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molding</title> <meta name="description" content="Search results for: wax molding"> <meta name="keywords" content="wax molding"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler 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id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="wax molding"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 166</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: wax molding</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">166</span> A Molding Surface Auto-inspection System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ssu-Han%20Chen">Ssu-Han Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Der-Baau%20Perng"> Der-Baau Perng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Molding process in IC manufacturing secures chips against the harms done by hot, moisture or other external forces. While a chip was being molded, defects like cracks, dilapidation, or voids may be embedding on the molding surface. The molding surfaces the study poises to treat and the ones on the market, though, differ in the surface where texture similar to defects is everywhere. Manual inspection usually passes over low-contrast cracks or voids; hence an automatic optical inspection system for molding surface is necessary. The proposed system is consisted of a CCD, a coaxial light, a back light as well as a motion control unit. Based on the property of statistical textures of the molding surface, a series of digital image processing and classification procedure is carried out. After training of the parameter associated with above algorithm, result of the experiment suggests that the accuracy rate is up to 93.75%, contributing to the inspection quality of IC molding surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=molding%20surface" title="molding surface">molding surface</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20vision" title=" machine vision"> machine vision</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20texture" title=" statistical texture"> statistical texture</a>, <a href="https://publications.waset.org/abstracts/search?q=discrete%20Fourier%20transformation" title=" discrete Fourier transformation"> discrete Fourier transformation</a> </p> <a href="https://publications.waset.org/abstracts/4170/a-molding-surface-auto-inspection-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4170.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">431</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">165</span> Optimization of Plastic Injection Molding Parameters by Altering Gate and Runner of Feeding System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Ramezani">Ali Ramezani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Balancing feeding system of plastic injection molding has overriding importance as it minimizes the process’s product defects such as weld line, shrinkage, sink marks and warpage. This article presents the difference between optimization of feeding system in identical multi-cavity molding and family molding using Moldflow Plastic Insight software. In this work, the effect of dimension, shape, position and type of gates and runners on the products quality was studied. The optimization was carried out by analyzing plastic injection molding process parameters, including melt temperature, mold temperature, cooling time, cooling temperature packing time and packing pressure. It was found that symmetrical feeding system is the most efficient shape for diminishing defects in identical multi-cavity molding. However, the same results were not concluded for family molding due to the differences between volume, mass, thickness and shape of cavities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=balancing%20feeding%20system" title="balancing feeding system">balancing feeding system</a>, <a href="https://publications.waset.org/abstracts/search?q=family%20molding" title=" family molding"> family molding</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-cavity" title=" multi-cavity"> multi-cavity</a>, <a href="https://publications.waset.org/abstracts/search?q=Moldflow" title=" Moldflow"> Moldflow</a>, <a href="https://publications.waset.org/abstracts/search?q=plastic%20injection" title=" plastic injection "> plastic injection </a> </p> <a href="https://publications.waset.org/abstracts/126876/optimization-of-plastic-injection-molding-parameters-by-altering-gate-and-runner-of-feeding-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/126876.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">135</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">164</span> Optimization of the Transfer Molding Process by Implementation of Online Monitoring Techniques for Electronic Packages</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Burcu%20Kaya">Burcu Kaya</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan-Martin%20Kaiser"> Jan-Martin Kaiser</a>, <a href="https://publications.waset.org/abstracts/search?q=Karl-Friedrich%20Becker"> Karl-Friedrich Becker</a>, <a href="https://publications.waset.org/abstracts/search?q=Tanja%20Braun"> Tanja Braun</a>, <a href="https://publications.waset.org/abstracts/search?q=Klaus-Dieter%20Lang"> Klaus-Dieter Lang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Quality of the molded packages is strongly influenced by the process parameters of the transfer molding. To achieve a better package quality and a stable transfer molding process, it is necessary to understand the influence of the process parameters on the package quality. This work aims to comprehend the relationship between the process parameters, and to identify the optimum process parameters for the transfer molding process in order to achieve less voids and wire sweep. To achieve this, a DoE is executed for process optimization and a regression analysis is carried out. A systematic approach is represented to generate models which enable an estimation of the number of voids and wire sweep. Validation experiments are conducted to verify the model and the results are presented. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dielectric%20analysis" title="dielectric analysis">dielectric analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=electronic%20packages" title=" electronic packages"> electronic packages</a>, <a href="https://publications.waset.org/abstracts/search?q=epoxy%20molding%20compounds" title=" epoxy molding compounds"> epoxy molding compounds</a>, <a href="https://publications.waset.org/abstracts/search?q=transfer%20molding%20process" title=" transfer molding process"> transfer molding process</a> </p> <a href="https://publications.waset.org/abstracts/46904/optimization-of-the-transfer-molding-process-by-implementation-of-online-monitoring-techniques-for-electronic-packages" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46904.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">382</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">163</span> Molding Properties of Cobalt-Chrome-Based Feedstocks Used in Low-Pressure Powder Injection Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ehsan%20Gholami">Ehsan Gholami</a>, <a href="https://publications.waset.org/abstracts/search?q=Vincent%20Demers"> Vincent Demers</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Low-pressure powder injection molding is an emerging technology for cost-effectively producing complex shape metallic parts with the proper dimensional tolerances, either in high or in low production volumes. In this study, the molding properties of cobalt-chrome-based feedstocks were evaluated for use in a low-pressure powder injection molding process. The rheological properties of feedstock formulations were obtained by mixing metallic powder with a proprietary wax-based binder system. Rheological parameters such as reference viscosity, shear rate sensitivity index, and activation energy for viscous flow, were extracted from the viscosity profiles and introduced into the Weir model to calculate the moldability index. Feedstocks were experimentally injected into a spiral mold cavity to validate the injection performance calculated with the model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=binder" title="binder">binder</a>, <a href="https://publications.waset.org/abstracts/search?q=feedstock" title=" feedstock"> feedstock</a>, <a href="https://publications.waset.org/abstracts/search?q=moldability" title=" moldability"> moldability</a>, <a href="https://publications.waset.org/abstracts/search?q=powder%20injection%20molding" title=" powder injection molding"> powder injection molding</a>, <a href="https://publications.waset.org/abstracts/search?q=viscosity" title=" viscosity"> viscosity</a> </p> <a href="https://publications.waset.org/abstracts/93003/molding-properties-of-cobalt-chrome-based-feedstocks-used-in-low-pressure-powder-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93003.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">273</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">162</span> Inverse Dynamics of the Mould Base of Blow Molding Machines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vigen%20Arakelian">Vigen Arakelian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper deals with the study of devices for displacement of the mould base of blow-molding machines. The displacement of the mould in the studied case is carried out by a linear actuator, which ensures the descent of the mould base and by extension springs, which return the letter in the initial position. The aim of this paper is to study the inverse dynamics of the device for displacement of the mould base of blow-molding machines and to determine its optimum parameters for higher rate of production. In the other words, it is necessary to solve the inverse dynamic problem to find the equation of motion linking applied forces with displacements. This makes it possible to determine the stiffness coefficient of the spring to turn the mold base back to the initial position for a given time. The obtained results are illustrated by a numerical example. It is shown that applying a spring with stiffness returns the mould base of the blow molding machine into the initial position in 0.1 sec. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design" title="design">design</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanisms" title=" mechanisms"> mechanisms</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamics" title=" dynamics"> dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=blow-molding%20machines" title=" blow-molding machines"> blow-molding machines</a> </p> <a href="https://publications.waset.org/abstracts/99143/inverse-dynamics-of-the-mould-base-of-blow-molding-machines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/99143.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">153</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">161</span> Development of Swing Valve for Gasoline Turbocharger Using Hybrid Metal Injection Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20S.%20So">B. S. So</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20H.%20Yoon"> Y. H. Yoon</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20O.%20Jung"> J. O. Jung</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20S.%20Bae"> K. S. Bae</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metal Injection Molding (MIM) is a technology that combines powder metallurgy and injection molding. Particularly, it is widely applied to the manufacture of precision mobile parts and automobile turbocharger parts because compact precision parts with complicated three-dimensional shapes that are difficult to machining are formed into a large number of finished products. The swing valve is a valve that adjusts the boost pressure of the turbocharger. Since the head portion is exposed to the harsh temperature condition of about 900 degrees in the gasoline GDI engine, it is necessary to use Inconel material with excellent heat resistance and abrasion resistance, resulting in high manufacturing cost. In this study, we developed a swing valve using a metal powder injection molding based hybrid material (Inconel 713C material with heat resistance is applied to the head part, and HK30 material with low price is applied to the rest of the body part). For this purpose, the process conditions of the metal injection molding were optimized to minimize the internal defects, and the effectiveness was confirmed by the fracture strength and fatigue test. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hybrid%20metal%20injection%20molding" title="hybrid metal injection molding">hybrid metal injection molding</a>, <a href="https://publications.waset.org/abstracts/search?q=swing%20valve" title=" swing valve"> swing valve</a>, <a href="https://publications.waset.org/abstracts/search?q=turbocharger" title=" turbocharger"> turbocharger</a>, <a href="https://publications.waset.org/abstracts/search?q=double%20injection" title=" double injection"> double injection</a> </p> <a href="https://publications.waset.org/abstracts/95552/development-of-swing-valve-for-gasoline-turbocharger-using-hybrid-metal-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95552.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">213</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">160</span> Online Monitoring Rheological Property of Polymer Melt during Injection Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chung-Chih%20Lin">Chung-Chih Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Chien-Liang%20Wu"> Chien-Liang Wu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The detection of the polymer melt state during manufacture process is regarded as an efficient way to control the molded part quality in advance. Online monitoring rheological property of polymer melt during processing procedure provides an approach to understand the melt state immediately. Rheological property reflects the polymer melt state at different processing parameters and is very important in injection molding process especially. An approach that demonstrates how to calculate rheological property of polymer melt through in-process measurement, using injection molding as an example, is proposed in this study. The system consists of two sensors and a data acquisition module can process the measured data, which are used for the calculation of rheological properties of polymer melt. The rheological properties of polymer melt discussed in this study include shear rate and viscosity which are investigated with respect to injection speed and melt temperature. The results show that the effect of injection speed on the rheological properties is apparent, especially for high melt temperature and should be considered for precision molding process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=injection%20molding" title="injection molding">injection molding</a>, <a href="https://publications.waset.org/abstracts/search?q=melt%20viscosity" title=" melt viscosity"> melt viscosity</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20rate" title=" shear rate"> shear rate</a>, <a href="https://publications.waset.org/abstracts/search?q=monitoring" title=" monitoring"> monitoring</a> </p> <a href="https://publications.waset.org/abstracts/23196/online-monitoring-rheological-property-of-polymer-melt-during-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23196.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">381</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">159</span> Multi-Scale Damage and Mechanical Behavior of Sheet Molding Compound Composites Subjected to Fatigue, Dynamic, and Post-Fatigue Dynamic Loadings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Shirinbayan">M. Shirinbayan</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Fitoussi"> J. Fitoussi</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Abbasnezhad"> N. Abbasnezhad</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Lucas"> A. Lucas</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Tcharkhtchi"> A. Tcharkhtchi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sheet Molding Compounds (SMCs) with special microstructures are very attractive to use in automobile structures especially when they are accidentally subjected to collision type accidents because of their high energy absorption capacity. These are materials designated as standard SMC, Advanced Sheet Molding Compounds (A-SMC), Low-Density SMC (LD-SMC) and etc. In this study, testing methods have been performed to compare the mechanical responses and damage phenomena of SMC, LD-SMC, and A-SMC under quasi-static and high strain rate tensile tests. The paper also aims at investigating the effect of an initial pre-damage induced by fatigue on the tensile dynamic behavior of A-SMC. In the case of SMCs and A-SMCs, whatever the fibers orientation and applied strain rate are, the first observed phenomenon of damage corresponds to decohesion of the fiber-matrix interface which is followed by coalescence and multiplication of these micro-cracks and their propagations. For LD-SMCs, damage mechanisms depend on the presence of Hollow Glass Microspheres (HGM) and fibers orientation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=SMC" title="SMC">SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=Sheet%20Molding%20Compound" title=" Sheet Molding Compound"> Sheet Molding Compound</a>, <a href="https://publications.waset.org/abstracts/search?q=LD-SMC" title=" LD-SMC"> LD-SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=Low-Density%20SMC" title=" Low-Density SMC"> Low-Density SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=A-SMC" title=" A-SMC"> A-SMC</a>, <a href="https://publications.waset.org/abstracts/search?q=Advanced%20Sheet%20Molding%20Compounds" title=" Advanced Sheet Molding Compounds"> Advanced Sheet Molding Compounds</a>, <a href="https://publications.waset.org/abstracts/search?q=HGM" title=" HGM"> HGM</a>, <a href="https://publications.waset.org/abstracts/search?q=Hollow%20Glass%20Microspheres" title=" Hollow Glass Microspheres"> Hollow Glass Microspheres</a>, <a href="https://publications.waset.org/abstracts/search?q=damage" title=" damage"> damage</a> </p> <a href="https://publications.waset.org/abstracts/100208/multi-scale-damage-and-mechanical-behavior-of-sheet-molding-compound-composites-subjected-to-fatigue-dynamic-and-post-fatigue-dynamic-loadings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100208.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">211</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">158</span> Optimization for the Hydraulic Clamping System of an Internal Circulation Two-Platen Injection Molding Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jian%20Wang">Jian Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Lu%20Yang"> Lu Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiong%20Peng"> Jiong Peng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Internal circulation two-platen clamping system for injection molding machine (IMM) has many potential advantages on energy-saving. In order to estimate its properties, experiments in this paper were carried out. Displacement and pressure of the components were measured. In comparison, the model of hydraulic clamping system was established by using AMESim. The related parameters as well as the energy consumption could be calculated. According to the analysis, the hydraulic system was optimized in order to reduce the energy consumption. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AMESim" title="AMESim">AMESim</a>, <a href="https://publications.waset.org/abstracts/search?q=energy-saving" title=" energy-saving"> energy-saving</a>, <a href="https://publications.waset.org/abstracts/search?q=injection%20molding%20machine" title=" injection molding machine"> injection molding machine</a>, <a href="https://publications.waset.org/abstracts/search?q=internal%20circulation" title=" internal circulation"> internal circulation</a> </p> <a href="https://publications.waset.org/abstracts/35095/optimization-for-the-hydraulic-clamping-system-of-an-internal-circulation-two-platen-injection-molding-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35095.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">550</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">157</span> Simulation of the Reactive Rotational Molding Using Smoothed Particle Hydrodynamics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Hamidi">A. Hamidi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Khelladi"> S. Khelladi</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Illoul"> L. Illoul</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Tcharkhtchi"> A. Tcharkhtchi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Reactive rotational molding (RRM) is a process to manufacture hollow plastic parts with reactive material has several advantages compared to conventional roto molding of thermoplastic powders: process cycle time is shorter; raw material is less expensive because polymerization occurs during processing and high-performance polymers may be used such as thermosets, thermoplastics or blends. However, several phenomena occur during this process which makes the optimization of the process quite complex. In this study, we have used a mixture of isocyanate and polyol as a reactive system. The chemical transformation of this system to polyurethane has been studied by thermal analysis and rheology tests. Thanks to these results of the curing process and rheological measurements, the kinetic and rheokinetik of polyurethane was identified. Smoothed Particle Hydrodynamics, a Lagrangian meshless method, was chosen to simulate reactive fluid flow in 2 and 3D configurations of the polyurethane during the process taking into account the chemical, and chemiorehological results obtained experimentally in this study. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reactive%20rotational%20molding" title="reactive rotational molding">reactive rotational molding</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=smoothed%20particle%20hydrodynamics" title=" smoothed particle hydrodynamics"> smoothed particle hydrodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20tension" title=" surface tension"> surface tension</a>, <a href="https://publications.waset.org/abstracts/search?q=rheology" title=" rheology"> rheology</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface%20flows" title=" free surface flows"> free surface flows</a>, <a href="https://publications.waset.org/abstracts/search?q=viscoelastic" title=" viscoelastic"> viscoelastic</a>, <a href="https://publications.waset.org/abstracts/search?q=interpolation" title=" interpolation"> interpolation</a> </p> <a href="https://publications.waset.org/abstracts/16815/simulation-of-the-reactive-rotational-molding-using-smoothed-particle-hydrodynamics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16815.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">288</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">156</span> Six Sigma-Based Optimization of Shrinkage Accuracy in Injection Molding Processes </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sky%20Chou">Sky Chou</a>, <a href="https://publications.waset.org/abstracts/search?q=Joseph%20C.%20Chen"> Joseph C. Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper focuses on using six sigma methodologies to reach the desired shrinkage of a manufactured high-density polyurethane (HDPE) part produced by the injection molding machine. It presents a case study where the correct shrinkage is required to reduce or eliminate defects and to improve the process capability index Cp and Cpk for an injection molding process. To improve this process and keep the product within specifications, the six sigma methodology, design, measure, analyze, improve, and control (DMAIC) approach, was implemented in this study. The six sigma approach was paired with the Taguchi methodology to identify the optimized processing parameters that keep the shrinkage rate within the specifications by our customer. An L9 orthogonal array was applied in the Taguchi experimental design, with four controllable factors and one non-controllable/noise factor. The four controllable factors identified consist of the cooling time, melt temperature, holding time, and metering stroke. The noise factor is the difference between material brand 1 and material brand 2. After the confirmation run was completed, measurements verify that the new parameter settings are optimal. With the new settings, the process capability index has improved dramatically. The purpose of this study is to show that the six sigma and Taguchi methodology can be efficiently used to determine important factors that will improve the process capability index of the injection molding process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=injection%20molding" title="injection molding">injection molding</a>, <a href="https://publications.waset.org/abstracts/search?q=shrinkage" title=" shrinkage"> shrinkage</a>, <a href="https://publications.waset.org/abstracts/search?q=six%20sigma" title=" six sigma"> six sigma</a>, <a href="https://publications.waset.org/abstracts/search?q=Taguchi%20parameter%20design" title=" Taguchi parameter design"> Taguchi parameter design</a> </p> <a href="https://publications.waset.org/abstracts/84336/six-sigma-based-optimization-of-shrinkage-accuracy-in-injection-molding-processes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84336.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">178</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">155</span> Study of Hot Press Molding Method of Biodegradable Composite, Polypropylene Reinforced Coconut Coir</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Herman%20Ruswan%20Suwarman">Herman Ruswan Suwarman</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Rivai"> Ahmad Rivai</a>, <a href="https://publications.waset.org/abstracts/search?q=Mochamad%20Saidiman"> Mochamad Saidiman</a>, <a href="https://publications.waset.org/abstracts/search?q=Kuncoro%20Diharjo"> Kuncoro Diharjo</a>, <a href="https://publications.waset.org/abstracts/search?q=Dody%20Ariawan"> Dody Ariawan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of biodegradable composite to solve ecological and environmental problems has currently risen as a trend. With the increasing use of biodegradable composite comes an increasing need to fabricate it properly. Yet this understanding has remained a challenge for the design engineer. Therefore, this study aims to explore how to combine coconut coir as a reinforcing material and polypropylene (PP) as a biodegradable polymer matrix. By using Hotpress Molding, two methods were developed and compared. The difference between these two methods is not only the step of fabrication but also the raw material. The first method involved a PP sheet and the second used PP pellets directly. Based on the results, it can be concluded that PP pellets yield better results, where the composite was produced in a shorter time, with an evenly distributed coconut coir and a smaller number of voids. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biodegradable" title="biodegradable">biodegradable</a>, <a href="https://publications.waset.org/abstracts/search?q=coconut%20coir" title=" coconut coir"> coconut coir</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20press%20molding" title=" hot press molding"> hot press molding</a>, <a href="https://publications.waset.org/abstracts/search?q=polypropylene" title=" polypropylene"> polypropylene</a> </p> <a href="https://publications.waset.org/abstracts/146760/study-of-hot-press-molding-method-of-biodegradable-composite-polypropylene-reinforced-coconut-coir" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146760.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">146</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">154</span> Design of the Fiber Lay-Up for the Composite Wind Turbine Blade in VARTM</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tzai-Shiung%20Li">Tzai-Shiung Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Wen-Bin%20Young"> Wen-Bin Young</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The wind turbine blade sustains various kinds of loadings during the operating and parking state. Due to the increasing size of the wind turbine blade, it is important to arrange the composite materials in a sufficient way to reach the optimal utilization of the material strength. In the fabrication process of the vacuum assisted resin transfer molding, the fiber content of the turbine blade depends on the vacuum pressure. In this study, a design of the fiber layup for the vacuum assisted resin transfer molding is conducted to achieve the efficient utilization the material strength. This design is for the wind turbine blade consisting of shell skins with or without the spar structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=resin%20film%20infiltration" title="resin film infiltration">resin film infiltration</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20assisted%20resin%20transfer%20molding%20process" title=" vacuum assisted resin transfer molding process"> vacuum assisted resin transfer molding process</a>, <a href="https://publications.waset.org/abstracts/search?q=wind%20turbine%20blade" title=" wind turbine blade"> wind turbine blade</a>, <a href="https://publications.waset.org/abstracts/search?q=composite%20materials" title=" composite materials"> composite materials</a> </p> <a href="https://publications.waset.org/abstracts/6109/design-of-the-fiber-lay-up-for-the-composite-wind-turbine-blade-in-vartm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6109.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">382</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">153</span> Development of Imprinting and Replica Molding of Soft Mold Curved Surface</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yung-Jin%20Weng">Yung-Jin Weng</a>, <a href="https://publications.waset.org/abstracts/search?q=Chia-Chi%20Chang"> Chia-Chi Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chun-Yu%20Tsai"> Chun-Yu Tsai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper is focused on the research of imprinting and replica molding of quasi-grey scale soft mold curved surface microstructure mold. In this paper, a magnetic photocuring forming system is first developed and built independently, then the magnetic curved surface microstructure soft mode is created; moreover, the magnetic performance of the magnetic curved surface at different heights is tested and recorded, and through experimentation and simulation, the magnetic curved surface microstructure soft mold is used in the research of quasi-grey scale soft mold curved surface microstructure imprinting and replica molding. The experimental results show that, under different surface curvatures and voltage control conditions, different quasi-grey scale array microstructures take shape. In addition, this paper conducts research on the imprinting and replica molding of photoresist composite magnetic powder in order to discuss the forming performance of magnetic photoresist, and finally, the experimental result is compared with the simulation to obtain more accurate prediction and results. This research is predicted to provide microstructure component preparation technology with heterogeneity and controllability, and is a kind of valid shaping quasi-grey scale microstructure manufacturing technology method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=soft%20mold" title="soft mold">soft mold</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic" title=" magnetic"> magnetic</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=curved%20surface" title=" curved surface"> curved surface</a> </p> <a href="https://publications.waset.org/abstracts/63938/development-of-imprinting-and-replica-molding-of-soft-mold-curved-surface" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63938.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">326</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">152</span> Effects of Dimensional Sizes of Mould on the Volumetric Shrinkage Strain of Lateric Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=John%20E.%20Sani">John E. Sani</a>, <a href="https://publications.waset.org/abstracts/search?q=Moses%20George"> Moses George</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The paper presents the result of a laboratory study carried out on lateritic soil to determine the effects of dimensional size on the volumetric shrinkage strain (VSS) using three mould sizes i.e. split former mould, proctor mould and California bearing ratio (CBR) mould at three energy levels; British standard light (BSL), West African standard (WAS) and British standard heavy (BSH) respectively. Compactions were done at different molding water content of -2 % to +6 % optimum moisture content (OMC). At -2% to +2% molding water content for the split former mould the volumetric shrinkage strain met the requirement of not more than 4% while at +4% and +6% only the WAS and BSH met the requirement. The proctor mould and the CBR mould on the other hand gave a lower value of volumetric shrinkage strain in all compactive effort and the values are lower than the 4% safe VSS value. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lateritic%20soil" title="lateritic soil">lateritic soil</a>, <a href="https://publications.waset.org/abstracts/search?q=volumetric%20shrinkage%20strain" title=" volumetric shrinkage strain"> volumetric shrinkage strain</a>, <a href="https://publications.waset.org/abstracts/search?q=molding%20water%20content" title=" molding water content"> molding water content</a>, <a href="https://publications.waset.org/abstracts/search?q=compactive%20effort" title=" compactive effort "> compactive effort </a> </p> <a href="https://publications.waset.org/abstracts/37221/effects-of-dimensional-sizes-of-mould-on-the-volumetric-shrinkage-strain-of-lateric-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37221.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">532</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">151</span> Optimization of Two Quality Characteristics in Injection Molding Processes via Taguchi Methodology</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Joseph%20C.%20Chen">Joseph C. Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Venkata%20Karthik%20Jakka"> Venkata Karthik Jakka</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main objective of this research is to optimize tensile strength and dimensional accuracy in injection molding processes using Taguchi Parameter Design. An L16 orthogonal array (OA) is used in Taguchi experimental design with five control factors at four levels each and with non-controllable factor vibration. A total of 32 experiments were designed to obtain the optimal parameter setting for the process. The optimal parameters identified for the shrinkage are shot volume, 1.7 cubic inch (A4); mold term temperature, 130 ºF (B1); hold pressure, 3200 Psi (C4); injection speed, 0.61 inch3/sec (D2); and hold time of 14 seconds (E2). The optimal parameters identified for the tensile strength are shot volume, 1.7 cubic inch (A4); mold temperature, 160 ºF (B4); hold pressure, 3100 Psi (C3); injection speed, 0.69 inch3/sec (D4); and hold time of 14 seconds (E2). The Taguchi-based optimization framework was systematically and successfully implemented to obtain an adjusted optimal setting in this research. The mean shrinkage of the confirmation runs is 0.0031%, and the tensile strength value was found to be 3148.1 psi. Both outcomes are far better results from the baseline, and defects have been further reduced in injection molding processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=injection%20molding%20processes" title="injection molding processes">injection molding processes</a>, <a href="https://publications.waset.org/abstracts/search?q=taguchi%20parameter%20design" title=" taguchi parameter design"> taguchi parameter design</a>, <a href="https://publications.waset.org/abstracts/search?q=tensile%20strength" title=" tensile strength"> tensile strength</a>, <a href="https://publications.waset.org/abstracts/search?q=high-density%20polyethylene%28HDPE%29" title=" high-density polyethylene(HDPE)"> high-density polyethylene(HDPE)</a> </p> <a href="https://publications.waset.org/abstracts/91601/optimization-of-two-quality-characteristics-in-injection-molding-processes-via-taguchi-methodology" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91601.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">196</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">150</span> Suitable Die Shaping for a Rectangular Shape Bottle by Application of FEM and AI Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Ploysook">N. Ploysook</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Rugsaj"> R. Rugsaj</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Suvanjumrat"> C. Suvanjumrat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The characteristic requirement for producing rectangular shape bottles was a uniform thickness of the plastic bottle wall. Die shaping was a good technique which controlled the wall thickness of bottles. An advance technology which was the finite element method (FEM) for blowing parison to be a rectangular shape bottle was conducted to reduce waste plastic from a trial and error method of a die shaping and parison control method. The artificial intelligent (AI) comprised of artificial neural network and genetic algorithm was selected to optimize the die gap shape from the FEM results. The application of AI technique could optimize the suitable die gap shape for the parison blow molding which did not depend on the parison control method to produce rectangular bottles with the uniform wall. Particularly, this application can be used with cheap blow molding machines without a parison controller therefore it will reduce cost of production in the bottle blow molding process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AI" title="AI">AI</a>, <a href="https://publications.waset.org/abstracts/search?q=bottle" title=" bottle"> bottle</a>, <a href="https://publications.waset.org/abstracts/search?q=die%20shaping" title=" die shaping"> die shaping</a>, <a href="https://publications.waset.org/abstracts/search?q=FEM" title=" FEM"> FEM</a> </p> <a href="https://publications.waset.org/abstracts/16970/suitable-die-shaping-for-a-rectangular-shape-bottle-by-application-of-fem-and-ai-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16970.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">238</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">149</span> Detection of Extrusion Blow Molding Defects by Airflow Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Eva%20Savy">Eva Savy</a>, <a href="https://publications.waset.org/abstracts/search?q=Anthony%20Ruiz"> Anthony Ruiz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In extrusion blow molding, there is great variability in product quality due to the sensitivity of the machine settings. These variations lead to unnecessary rejects and loss of time. Yet production control is a major challenge for companies in this sector to remain competitive within their market. Current quality control methods only apply to finished products (vision control, leak test...). It has been shown that material melt temperature, blowing pressure, and ambient temperature have a significant impact on the variability of product quality. Since blowing is a key step in the process, we have studied this parameter in this paper. The objective is to determine if airflow analysis allows the identification of quality problems before the full completion of the manufacturing process. We conducted tests to determine if it was possible to identify a leakage defect and an obstructed defect, two common defects on products. The results showed that it was possible to identify a leakage defect by airflow analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=extrusion%20blow%20molding" title="extrusion blow molding">extrusion blow molding</a>, <a href="https://publications.waset.org/abstracts/search?q=signal" title=" signal"> signal</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor" title=" sensor"> sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=defects" title=" defects"> defects</a>, <a href="https://publications.waset.org/abstracts/search?q=detection" title=" detection"> detection</a> </p> <a href="https://publications.waset.org/abstracts/161761/detection-of-extrusion-blow-molding-defects-by-airflow-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161761.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">151</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">148</span> Reducing Component Stress during Encapsulation of Electronics: A Simulative Examination of Thermoplastic Foam Injection Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Constantin%20Ott">Constantin Ott</a>, <a href="https://publications.waset.org/abstracts/search?q=Dietmar%20Drummer"> Dietmar Drummer</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The direct encapsulation of electronic components is an effective way of protecting components against external influences. In addition to achieving a sufficient protective effect, there are two other big challenges for satisfying the increasing demand for encapsulated circuit boards. The encapsulation process should be both suitable for mass production and offer a low component load. Injection molding is a method with good suitability for large series production but also with typically high component stress. In this article, two aims were pursued: first, the development of a calculation model that allows an estimation of the occurring forces based on process variables and material parameters. Second, the evaluation of a new approach for stress reduction by means of thermoplastic foam injection molding. For this purpose, simulation-based process data was generated with the Moldflow simulation tool. Based on this, component stresses were calculated with the calculation model. At the same time, this paper provided a model for estimating the forces occurring during overmolding and derived a solution method for reducing these forces. The suitability of this approach was clearly demonstrated and a significant reduction in shear forces during overmolding was achieved. It was possible to demonstrate a process development that makes it possible to meet the two main requirements of direct encapsulation in addition to a high protective effect. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=encapsulation" title="encapsulation">encapsulation</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20reduction" title=" stress reduction"> stress reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=foam-injection-molding" title=" foam-injection-molding"> foam-injection-molding</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/145190/reducing-component-stress-during-encapsulation-of-electronics-a-simulative-examination-of-thermoplastic-foam-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/145190.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">126</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">147</span> Thermal and Mechanical Properties of Powder Injection Molded Alumina Nano-Powder</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Rezaee%20Saraji">Mostafa Rezaee Saraji</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Keshavarz%20Panahi"> Ali Keshavarz Panahi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, the processing steps for producing alumina parts using powder injection molding (PIM) technique and nano-powder were investigated and the thermal conductivity and flexural strength of samples were determined as a function of sintering temperature and holding time. In the first step, the feedstock with 58 vol. % of alumina nano-powder with average particle size of 100nm was prepared using Extrumixing method to obtain appropriate homogeneity. This feedstock was injection molded into the two cavity mold with rectangular shape. After injection molding step, thermal and solvent debinding methods were used for debinding of molded samples and then these debinded samples were sintered in different sintering temperatures and holding times. From the results, it was found that the flexural strength and thermal conductivity of samples increased by increasing sintering temperature and holding time; in sintering temperature of 1600ºC and holding time of 5h, the flexural strength and thermal conductivity of sintered samples reached to maximum values of 488MPa and 40.8 W/mK, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alumina%20nano-powder" title="alumina nano-powder">alumina nano-powder</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=flexural%20strength" title=" flexural strength"> flexural strength</a>, <a href="https://publications.waset.org/abstracts/search?q=powder%20injection%20molding" title=" powder injection molding"> powder injection molding</a> </p> <a href="https://publications.waset.org/abstracts/41809/thermal-and-mechanical-properties-of-powder-injection-molded-alumina-nano-powder" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41809.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">329</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">146</span> Simulation of Cure Kinetics and Process-Induced Stresses in Carbon Fibre Composite Laminate Manufactured by a Liquid Composite Molding Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jayaraman%20Muniyappan">Jayaraman Muniyappan</a>, <a href="https://publications.waset.org/abstracts/search?q=Bachchan%20Kr%20Mishra"> Bachchan Kr Mishra</a>, <a href="https://publications.waset.org/abstracts/search?q=Gautam%20Salkar"> Gautam Salkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Swetha%20Manian%20Sridhar"> Swetha Manian Sridhar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vacuum Assisted Resin Transfer Molding (VARTM), a cost effective method of Liquid Composite Molding (LCM), is a single step process where the resin, at atmospheric pressure, is infused through a preform that is maintained under vacuum. This hydrodynamic pressure gradient is responsible for the flow of resin through the dry fabric preform. The current study has a slight variation to traditional VARTM, wherein, the resin infuses through the fabric placed on a heated mold to reduce its viscosity. The saturated preform is subjected to a cure cycle where the resin hardens as it undergoes curing. During this cycle, an uneven temperature distribution through the thickness of the composite and excess exothermic heat released due to different cure rates result in non-uniform curing. Additionally, there is a difference in thermal expansion coefficient between fiber and resin in a given plane and between adjacent plies. All these effects coupled with orthotropic coefficient of thermal expansion of the composite give rise to process-induced stresses in the laminate. Such stresses lead to part deformation when the laminate tries to relieve them as the part is released off the mold. The current study looks at simulating resin infusion, cure kinetics and the structural response of composite laminate subject to process-induced stresses. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cure%20kinetics" title="cure kinetics">cure kinetics</a>, <a href="https://publications.waset.org/abstracts/search?q=process-induced%20stresses" title=" process-induced stresses"> process-induced stresses</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20expansion%20coefficient" title=" thermal expansion coefficient"> thermal expansion coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20assisted%20resin%20transfer%20molding" title=" vacuum assisted resin transfer molding"> vacuum assisted resin transfer molding</a> </p> <a href="https://publications.waset.org/abstracts/54963/simulation-of-cure-kinetics-and-process-induced-stresses-in-carbon-fibre-composite-laminate-manufactured-by-a-liquid-composite-molding-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54963.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">240</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">145</span> Mechanical and Thermal Characterization of Washout Tooling for Resin Transfer Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zachary%20N.%20Wing">Zachary N. Wing</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Compared to autoclave based processes, Resin Transfer Molding (RTM) offers several key advantages. This includes high internal and external complexity, less waste, lower volatile emissions, higher production rates, and excellent surface finish. However, the injection of high pressure-high temperature resin presents a tooling challenge in cases where trapped geometries exist. Tooling materials that can sustain these conditions and be easily removed would expand the use of RTM. We have performed research on developing an RTM suitable tooling material called 'RTMCore' for use in forming trapped geometries. RTMCore tooling materials can withstand the injection of high temperature-high pressure resin but be easily removed with tap water. RTM properties and performance capabilities are reviewed against other washout systems. Our research will cover the preliminary characterization of tooling system properties, mechanical behavior, and initial results from an RTM manufacturing trial. Preliminary results show the material can sustain pressures greater than 13 MPa and temperatures greater than 150°C. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=RTM" title="RTM">RTM</a>, <a href="https://publications.waset.org/abstracts/search?q=resin%20transfer%20molding" title=" resin transfer molding"> resin transfer molding</a>, <a href="https://publications.waset.org/abstracts/search?q=trapped%20geometries" title=" trapped geometries"> trapped geometries</a>, <a href="https://publications.waset.org/abstracts/search?q=washout%20tooling" title=" washout tooling"> washout tooling</a> </p> <a href="https://publications.waset.org/abstracts/87415/mechanical-and-thermal-characterization-of-washout-tooling-for-resin-transfer-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87415.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">158</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">144</span> Developing an Online Library for Faster Retrieval of Mold Base and Standard Parts of Injection Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alan%20C.%20Lin">Alan C. Lin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ricky%20N.%20Joevan"> Ricky N. Joevan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper focuses on developing a system to transfer mold base plates and standard parts faster during the stage of injection mold design. This system not only provides a way to compare the file version, but also it utilizes <em>Siemens NX 10 </em>to isolate the updated information into a single executable file (<em>.dll</em>), and then, the file can be transferred without the need of transferring the whole file. By this way, the system can help the user to download only necessary mold base plates and standard parts, and those parts downloaded are only the updated portions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CAD" title="CAD">CAD</a>, <a href="https://publications.waset.org/abstracts/search?q=injection%20molding" title=" injection molding"> injection molding</a>, <a href="https://publications.waset.org/abstracts/search?q=mold%20base" title=" mold base"> mold base</a>, <a href="https://publications.waset.org/abstracts/search?q=data%20retrieval" title=" data retrieval"> data retrieval</a> </p> <a href="https://publications.waset.org/abstracts/67449/developing-an-online-library-for-faster-retrieval-of-mold-base-and-standard-parts-of-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67449.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">302</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">143</span> Different Processing Methods to Obtain a Carbon Composite Element for Cycling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maria%20Fonseca">Maria Fonseca</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20Branco"> Ana Branco</a>, <a href="https://publications.waset.org/abstracts/search?q=Joao%20Graca"> Joao Graca</a>, <a href="https://publications.waset.org/abstracts/search?q=Rui%20Mendes"> Rui Mendes</a>, <a href="https://publications.waset.org/abstracts/search?q=Pedro%20Mimoso"> Pedro Mimoso</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present work is focused on the production of a carbon composite element for cycling through different techniques, namely, blow-molding and high-pressure resin transfer injection (HP-RTM). The main objective of this work is to compare both processes to produce carbon composite elements for the cycling industry. It is well known that the carbon composite components for cycling are produced mainly through blow-molding; however, this technique depends strongly on manual labour, resulting in a time-consuming production process. Comparatively, HP-RTM offers a more automated process which should lead to higher production rates. Nevertheless, a comparison of the elements produced through both techniques must be done, in order to assess if the final products comply with the required standards of the industry. The main difference between said techniques lies in the used material. Blow-moulding uses carbon prepreg (carbon fibres pre-impregnated with a resin system), and the material is laid up by hand, piece by piece, on a mould or on a hard male. After that, the material is cured at a high temperature. On the other hand, in the HP-RTM technique, dry carbon fibres are placed on a mould, and then resin is injected at high pressure. After some research regarding the best material systems (prepregs and braids) and suppliers, an element was designed (similar to a handlebar) to be constructed. The next step was to perform FEM simulations in order to determine what the best layup of the composite material was. The simulations were done for the prepreg material, and the obtained layup was transposed to the braids. The selected material was a prepreg with T700 carbon fibre (24K) and an epoxy resin system, for the blow-molding technique. For HP-RTM, carbon fibre elastic UD tubes and ± 45º braids were used, with both 3K and 6K filaments per tow, and the resin system was an epoxy as well. After the simulations for the prepreg material, the optimized layup was: [45°, -45°,45°, -45°,0°,0°]. For HP-RTM, the transposed layup was [ ± 45° (6k); 0° (6k); partial ± 45° (6k); partial ± 45° (6k); ± 45° (3k); ± 45° (3k)]. The mechanical tests showed that both elements can withstand the maximum load (in this case, 1000 N); however, the one produced through blow-molding can support higher loads (≈1300N against 1100N from HP-RTM). In what concerns to the fibre volume fraction (FVF), the HP-RTM element has a slightly higher value ( > 61% compared to 59% of the blow-molding technique). The optical microscopy has shown that both elements have a low void content. In conclusion, the elements produced using HP-RTM can compare to the ones produced through blow-molding, both in mechanical testing and in the visual aspect. Nevertheless, there is still space for improvement in the HP-RTM elements since the layup of the braids, and UD tubes could be optimized. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=HP-RTM" title="HP-RTM">HP-RTM</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20composites" title=" carbon composites"> carbon composites</a>, <a href="https://publications.waset.org/abstracts/search?q=cycling" title=" cycling"> cycling</a>, <a href="https://publications.waset.org/abstracts/search?q=FEM" title=" FEM"> FEM</a> </p> <a href="https://publications.waset.org/abstracts/108413/different-processing-methods-to-obtain-a-carbon-composite-element-for-cycling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108413.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">132</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">142</span> Effect of Permeability on Glass Fiber Reinforced Plastic Laminate Produced by Vacuum Assisted Resin Transfer Molding Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nagri%20Sateesh">Nagri Sateesh</a>, <a href="https://publications.waset.org/abstracts/search?q=Kundavarapu%20Vengalrao"> Kundavarapu Vengalrao</a>, <a href="https://publications.waset.org/abstracts/search?q=Kopparthi%20Phaneendra%20Kumar"> Kopparthi Phaneendra Kumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vacuum assisted resin transfer molding (VARTM) is one of the manufacturing technique that is viable for production of fiber reinforced polymer composite components suitable for aerospace, marine and commercial applications. However, the repeatable quality of the product can be achieved by critically fixing the process parameters such as Vacuum Pressure (VP) and permeability of the preform. The present investigation is aimed at studying the effect of permeability for production of Glass Fiber Reinforced Plastic (GFRP) components with consistent quality. The VARTM mould is made with an acrylic transparent top cover to observe and record the resin flow pattern. Six layers of randomly placed glass fiber under five different vacuum pressures VP1 = 0.013, VP2 = 0.026, VP3 = 0.039, VP4 = 0.053 and VP5 = 0.066 MPa were studied. The laminates produced by this process under the above mentioned conditions were characterized with ASTM D procedures so as to study the effect of these process parameters on the quality of the laminate. Moreover, as mentioned there is a considerable effect of permeability on the impact strength and the void content in the laminates under different vacuum pressures. SEM analysis of the impact tested fractured GFRP composites showed the bonding of fiber and matrix. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=permeability" title="permeability">permeability</a>, <a href="https://publications.waset.org/abstracts/search?q=vacuum%20assisted%20resin%20transfer%20molding%20%28VARTM%29" title=" vacuum assisted resin transfer molding (VARTM)"> vacuum assisted resin transfer molding (VARTM)</a>, <a href="https://publications.waset.org/abstracts/search?q=ASTM%20D%20standards" title=" ASTM D standards"> ASTM D standards</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a> </p> <a href="https://publications.waset.org/abstracts/97819/effect-of-permeability-on-glass-fiber-reinforced-plastic-laminate-produced-by-vacuum-assisted-resin-transfer-molding-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97819.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">141</span> A Pull-Out Fiber/Matrix Interface Characterization of Vegetal Fibers Reinforced Thermoplastic Polymer Composites, the Inﬂuence of the Processing Temperature</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Duy%20Cuong%20Nguyen">Duy Cuong Nguyen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Makke"> Ali Makke</a>, <a href="https://publications.waset.org/abstracts/search?q=Guillaume%20Montay"> Guillaume Montay</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work presents an improved single ﬁber pull-out test for ﬁber/matrix interface characterization. This test has been used to study the Inter-Facial Shear Strength ‘IFSS’ of hemp ﬁbers reinforced polypropylene (PP). For this aim, the ﬁber diameter has been carefully measured using a tomography inspired method. The ﬁber section contour can then be approximated by a circle or a polygon. The results show that the IFSS is overestimated if the circular approximation is used. The Inﬂuence of the molding temperature on the IFSS has also been studied. We ﬁnd a molding temperature of 183°C leads to better interface properties. Above or below this temperature the interface strength is reduced. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite" title="composite">composite</a>, <a href="https://publications.waset.org/abstracts/search?q=hemp" title=" hemp"> hemp</a>, <a href="https://publications.waset.org/abstracts/search?q=interface" title=" interface"> interface</a>, <a href="https://publications.waset.org/abstracts/search?q=pull-out" title=" pull-out"> pull-out</a>, <a href="https://publications.waset.org/abstracts/search?q=processing" title=" processing"> processing</a>, <a href="https://publications.waset.org/abstracts/search?q=polypropylene" title=" polypropylene"> polypropylene</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a> </p> <a href="https://publications.waset.org/abstracts/29372/a-pull-out-fibermatrix-interface-characterization-of-vegetal-fibers-reinforced-thermoplastic-polymer-composites-the-influence-of-the-processing-temperature" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29372.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">392</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">140</span> Investigation on the Cooling Performance of Cooling Channels Fabricated via Selective Laser Melting for Injection Molding</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Changyong%20Liu">Changyong Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Junda%20Tong"> Junda Tong</a>, <a href="https://publications.waset.org/abstracts/search?q=Feng%20Xu"> Feng Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Ninggui%20Huang"> Ninggui Huang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the injection molding process, the performance of cooling channels is crucial to the part quality. Through the application of conformal cooling channels fabricated via metal additive manufacturing, part distortion, warpage can be greatly reduced and cycle time can be greatly shortened. However, the properties of additively manufactured conformal cooling channels are quite different from conventional drilling processes such as the poorer dimensional accuracy and larger surface roughness. These features have significant influences on its cooling performance. In this study, test molds with the cooling channel diameters of φ2 mm, φ3 mm and φ4 mm were fabricated via selective laser melting and conventional drilling process respectively. A test system was designed and manufactured to measure the pressure difference between the channel inlet and outlet, the coolant flow rate and the temperature variation during the heating process. It was found that the cooling performance of SLM-fabricated channels was poorer than drilled cooling channels due to the smaller sectional area of cooling channels resulted from the low dimensional accuracy and the unmolten particles adhered to the channel surface. Theoretical models were established to determine the friction factor and heat transfer coefficient of SLM-fabricated cooling channels. These findings may provide guidance to the design of conformal cooling channels. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conformal%20cooling%20channels" title="conformal cooling channels">conformal cooling channels</a>, <a href="https://publications.waset.org/abstracts/search?q=selective%20laser%20melting" title=" selective laser melting"> selective laser melting</a>, <a href="https://publications.waset.org/abstracts/search?q=cooling%20performance" title=" cooling performance"> cooling performance</a>, <a href="https://publications.waset.org/abstracts/search?q=injection%20molding" title=" injection molding"> injection molding</a> </p> <a href="https://publications.waset.org/abstracts/102200/investigation-on-the-cooling-performance-of-cooling-channels-fabricated-via-selective-laser-melting-for-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/102200.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">150</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">139</span> A Program Based on Artistic and Musical Activities to Acquire Some Educational Concepts for Children with Learning Difficulties</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Amin%20Mousa">Ahmed Amin Mousa</a>, <a href="https://publications.waset.org/abstracts/search?q=Huda%20Mazeed"> Huda Mazeed</a>, <a href="https://publications.waset.org/abstracts/search?q=Eman%20Saad"> Eman Saad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study aims to identify the extent of the effectiveness of the artistic formation program using some types of pastes to reduce the hyperactivity of the kindergarten child. The researcher has discussed the effectiveness of the artistic program using some types of pastes in reducing the hyperactivity of the kindergarten child. The research sample included 120 children of ages between 5 to 6 years old from the five schools for special needs section learning disability, Cairo Province. The study used the empirical like curriculum which depends on designing one group using the before and after application measurement for the group to validate the fidelity of both the hypothesis and the effectiveness of the program. The variables of the study were specified as follows; artistic formation program using paper Mache as an independent variable and its effect on skills of kindergarten child with learning disabilities as a subsequent variable. The researchers depended on applying a group of artistic formation program using pulp melding skills for kindergarten children with learning disabilities. The tools of the study, designed by the researcher, included: recording card used for recording the Effective program using pulp molding skills for kindergarten children with learning disabilities during practicing the artistic formation activity. In additional, there was a program using pulp molding skills for kindergarten children with learning disabilities. The results proved the effectiveness of the program using pulp molding skills for kindergarten children with learning disabilities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=artistic%20program" title="artistic program">artistic program</a>, <a href="https://publications.waset.org/abstracts/search?q=developing%20skills" title=" developing skills"> developing skills</a>, <a href="https://publications.waset.org/abstracts/search?q=kindergarten" title=" kindergarten"> kindergarten</a>, <a href="https://publications.waset.org/abstracts/search?q=children" title=" children"> children</a>, <a href="https://publications.waset.org/abstracts/search?q=learning%20disabilities" title=" learning disabilities"> learning disabilities</a> </p> <a href="https://publications.waset.org/abstracts/138898/a-program-based-on-artistic-and-musical-activities-to-acquire-some-educational-concepts-for-children-with-learning-difficulties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138898.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">138</span> The Analysis of Defects Prediction in Injection Molding </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Moayyedian">Mehdi Moayyedian</a>, <a href="https://publications.waset.org/abstracts/search?q=Kazem%20Abhary"> Kazem Abhary</a>, <a href="https://publications.waset.org/abstracts/search?q=Romeo%20Marian"> Romeo Marian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an evaluation of a plastic defect in injection molding before it occurs in the process; it is known as the short shot defect. The evaluation of different parameters which affect the possibility of short shot defect is the aim of this paper. The analysis of short shot possibility is conducted via SolidWorks Plastics and Taguchi method to determine the most significant parameters. Finite Element Method (FEM) is employed to analyze two circular flat polypropylene plates of 1 mm thickness. Filling time, part cooling time, pressure holding time, melt temperature and gate type are chosen as process and geometric parameters, respectively. A methodology is presented herein to predict the possibility of the short-shot occurrence. The analysis determined melt temperature is the most influential parameter affecting the possibility of short shot defect with a contribution of 74.25%, and filling time with a contribution of 22%, followed by gate type with a contribution of 3.69%. It was also determined the optimum level of each parameter leading to a reduction in the possibility of short shot are gate type at level 1, filling time at level 3 and melt temperature at level 3. Finally, the most significant parameters affecting the possibility of short shot were determined to be melt temperature, filling time, and gate type. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=injection%20molding" title="injection molding">injection molding</a>, <a href="https://publications.waset.org/abstracts/search?q=plastic%20defects" title=" plastic defects"> plastic defects</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20shot" title=" short shot"> short shot</a>, <a href="https://publications.waset.org/abstracts/search?q=Taguchi%20method" title=" Taguchi method "> Taguchi method </a> </p> <a href="https://publications.waset.org/abstracts/56717/the-analysis-of-defects-prediction-in-injection-molding" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56717.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">218</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">137</span> Virtual Prototyping of LED Chip Scale Packaging Using Computational Fluid Dynamic and Finite Element Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20C.%20Law">R. C. Law</a>, <a href="https://publications.waset.org/abstracts/search?q=Shirley%20Kang"> Shirley Kang</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Y.%20Hin"> T. Y. Hin</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Z.%20Abdullah"> M. Z. Abdullah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> LED technology has been evolving aggressively in recent years from incandescent bulb during older days to as small as chip scale package. It will continue to stay bright in future. As such, there is tremendous pressure to stay competitive in the market by optimizing products to next level of performance and reliability with the shortest time to market. This changes the conventional way of product design and development to virtual prototyping by means of Computer Aided Engineering (CAE). It comprises of the deployment of Finite Element Method (FEM) and Computational Fluid Dynamic (CFD). FEM accelerates the investigation for early detection of failures such as crack, improve the thermal performance of system and enhance solder joint reliability. CFD helps to simulate the flow pattern of molding material as a function of different temperature, molding parameters settings to evaluate failures like voids and displacement. This paper will briefly discuss the procedures and applications of FEM in thermal stress, solder joint reliability and CFD of compression molding in LED CSP. Integration of virtual prototyping in product development had greatly reduced the time to market. Many successful achievements with minimized number of evaluation iterations required in the scope of material, process setting, and package architecture variant have been materialized with this approach. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LED" title="LED">LED</a>, <a href="https://publications.waset.org/abstracts/search?q=chip%20scale%20packaging%20%28CSP%29" title=" chip scale packaging (CSP)"> chip scale packaging (CSP)</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamic%20%28CFD%29" title=" computational fluid dynamic (CFD)"> computational fluid dynamic (CFD)</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20prototyping" title=" virtual prototyping "> virtual prototyping </a> </p> <a href="https://publications.waset.org/abstracts/74429/virtual-prototyping-of-led-chip-scale-packaging-using-computational-fluid-dynamic-and-finite-element-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74429.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">287</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=wax%20molding&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=wax%20molding&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=wax%20molding&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=wax%20molding&page=5">5</a></li> <li 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