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Investigation Of Foaming Behaviors In Injection Molding Using Mold Pressure Profile
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Book Synopsis Investigation of Foaming Behaviors in Injection Molding Using Mold Pressure Profile by : John Won S. Lee
Download or read book Investigation of Foaming Behaviors in Injection Molding Using Mold Pressure Profile written by John Won S. Lee and published by . This book was released on 2009 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is intended to improve the understanding of foaming behaviors in various foam injection molding processes: structural foam molding, gas counter pressure molding, and gas counter pressure with mold opening. The foaming behavior in foam injection molding is different from foam extrusion in two ways. First, foaming occurs in a confined volume, which consists of a mold, whereas, it occurs in an open environment in foam extrusion. And second, while the foaming behavior in foam extrusion does not change with time once the steady state is reached, foam injection molding is on the other hand, time-dependent. These differences made it very challenging to study the foaming behaviors in foam injection molding. In this thesis, experiments were first conducted in foam extrusion to understand the effects of processing and material parameters on cell nucleation and growth behaviors. Subsequently, the knowledge obtained from the foam extrusion experiments was transferred to the foam injection molding process and the fundamental foaming mechanisms in foam injection molding were developed by conducting extensive experiments. Four processing parameters were mainly studied in this thesis: injection speed, void fraction setting (i.e., shot size), nitrogen content, and gate resistance. The experimental results revealed that the mold pressure profile during the foam injection molding process governed its foaming behaviors. Furthermore, by analyzing the mold pressure profile during the structural foam molding, it was possible to predict the achievable cell density in structural foam molding based on the foam extrusion results. When the gas counter pressure was employed, the analysis of the foaming behavior was relatively easier since the cell nucleation did not occur during the injection stage. However, the cell density that was achieved by using the gas counter pressure was generally lower than that obtained in structural foam molding due to the lower pressure drop rate caused by the use of the gas counter pressure. It was also discovered that the use of mold opening in combination with the gas counter pressure was very effective when uniform cell structure with a high void fraction was desired in addition to class-A surface quality.
Book Synopsis Simulation of Cell Growth in High-pressure Foam Injection Molding by : Chongda Wang
Download or read book Simulation of Cell Growth in High-pressure Foam Injection Molding written by Chongda Wang and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, visualized experiments were conducted to reveal the fundamental mechanisms of nucleation and growth using high-pressure foam injection molding (HP-FIM) with and without mold opening (MO) using a real-time in-situ visualization system. Results from both molding methods showed significant differences in nucleation and growth behavior and final foam morphology when different packing pressures were applied. A simulation strategy is proposed to predict the bubble growth profile in both HP-FIM and HP-FIM + MO. The simulation is composed of three main components 1. The Cell model, 2. Material and transport properties which are functions of temperature, pressure, and blowing agent concentration, 3. The Simha-Somcynsky equation of state. Simulation was conducted on both molding methods. The predicted growth profiles for both trials were in quantitative agreement with experimental findings. Sensitivity analysis was also conducted, the resulted growth profiles under different conditions were in qualitative agreement with the literature.
Book Synopsis Physical Foam Injection Molding by : Hartmut Traut
Download or read book Physical Foam Injection Molding written by Hartmut Traut and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2024-05-06 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than half of all injection molded plastic parts can be produced more cost-effectively and with better tolerances using foam injection molding compared to traditional compact injection molding. For the part designer, the focus is on the functionality of the molded part, not on the plastic-compatible design, which is precisely what compact injection molding requires. This book describes the necessary fundamentals of physical foam injection molding, clearly illustrated by means of detailed, industrially proven examples to show the technology’s potential. Machine and mold technology are also explained in detail, and polymers suitable for the process are discussed. The focus is always on the question of whether the potential of physical foam injection molding has already been exhausted or whether it is emerging as a second standard process alongside compact injection molding. The experienced authors make it possible to look beyond the end of one’s nose. The reader can see which plastic parts can be converted from compact to foam injection molding, and is encouraged to rethink the part design. With this book, specialists are able to examine an application for their own company and analyze it with regard to its economic implementation. However, the book also shows the clear limitations of this technology. Content: Foam Injection Molding and its Different Process Variants Definition and Characteristics of Physical Foam Injection Molding Design Guidelines for Foamed Components Polymers for Foam Injection Molding Process Simulation Mechanical Fundamentals of the Foam Injection Molding System Mold Technology Application Examples: Automotive/Household/Packaging/Medical
Book Synopsis Some Critical Issues for Injection Molding by : Jian Wang
Download or read book Some Critical Issues for Injection Molding written by Jian Wang and published by BoD – Books on Demand. This book was released on 2012-03-23 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is composed of different chapters which are related to the subject of injection molding and written by leading international academic experts in the field. It contains introduction on polymer PVT measurements and two main application areas of polymer PVT data in injection molding, optimization for injection molding process, Powder Injection Molding which comprises Ceramic Injection Molding and Metal Injection Molding, ans some special techniques or applications in injection molding. It provides some clear presentation of injection molding process and equipment to direct people in plastics manufacturing to solve problems and avoid costly errors. With useful, fundamental information for knowing and optimizing the injection molding operation, the readers could gain some working knowledge of the injection molding.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1978 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantitative Analysis of the Shrinkage and Warpage Behavior of Injection Molded Parts Using Conventional and Microcellular Injection Molding and Microcellular Co-injection Molding by : Adam Jon Kramschuster
Download or read book Quantitative Analysis of the Shrinkage and Warpage Behavior of Injection Molded Parts Using Conventional and Microcellular Injection Molding and Microcellular Co-injection Molding written by Adam Jon Kramschuster and published by . This book was released on 2005 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phenolic Based Foams by : Sandhya P.K
Download or read book Phenolic Based Foams written by Sandhya P.K and published by Springer Nature. This book was released on 2022-01-13 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest developments in phenolic foams and their applications. Compared with polystyrene and polyurethane foams, phenolic foams are known as third-generation polymeric foams. Phenolic foams exhibit excellent fire-retardant properties, including low flammability, low peak heat release rate, no dripping during combustion, and low toxicity. This book discusses various aspects of phenolic foams including properties, synthesis, fabrication methodologies, and applications. The contents also cover the methods for toughening of phenolic foams to make them more widely applicable. This book is of interest to both academics and industry alike. It is also a useful reference for fire safety regulators and policy-makers looking for new materials and methods for sustainable fire protection.
Book Synopsis Advances in Design, Simulation and Manufacturing VII by : Vitalii Ivanov
Download or read book Advances in Design, Simulation and Manufacturing VII written by Vitalii Ivanov and published by Springer Nature. This book was released on with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Fault Diagnosis in Thermoplastic Injection Molding Via Mold Cavity Pressure Signal Analysis by : Jin Zhang
Download or read book Fault Diagnosis in Thermoplastic Injection Molding Via Mold Cavity Pressure Signal Analysis written by Jin Zhang and published by . This book was released on 2006 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: In thermoplastic injection molding, mold cavity pressure signals facilitate process monitoring and diagnosis. The "healthy" process condition and parameter settings which lead to a "healthy" cavity pressure profiles are obtained using design of experiments and response surface analysis. The diagnostic system developed is shown to be fast, robust and adaptable. This methodology is suitable for on-line use for fault diagnostics and the run-to-run process control.
Book Synopsis Handbook of Polymeric Foams and Foam Technology by : Daniel Klempner
Download or read book Handbook of Polymeric Foams and Foam Technology written by Daniel Klempner and published by Hanser Gardner Publications. This book was released on 2004 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing all classes of polymeric foams, including their chemistry, synthesis, commercial production methods, properties, and applications, this handbook is designed to support engineers in their effort to develop practical solutions for industrial design and manufacturing challenges.
Book Synopsis Polylactide Foams by : Mohammadreza Nofar
Download or read book Polylactide Foams written by Mohammadreza Nofar and published by William Andrew. This book was released on 2017-09-18 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polylactide Foams: Fundamentals, Manufacturing, and Applications provides an introduction to the fundamental science behind plastic foams, polylactic acid) and polylactide foaming, giving designers tactics to replace traditional resins with sustainable and biodegradable materials. The book then delves deeper into the technology behind PLA foaming, such as PLA/gas mixture characteristics, solubility, interfacial tension behaviors and crystallization kinetics of various types of PLA and their compounds. The foaming behaviors and mechanisms of various types of PLA and PLA compounds are extensively analyzed and discussed through different manufacturing technologies, namely extrusion foaming, foam injection molding and bead foaming. Interest in Poly(lactic acid) and PLA foams is extremely high – particularly as a potential replacement for styrenic resins – and the price of PLA resin is lower than ever before. This biopolymer has significant potential to improve the sustainability of the plastics industry. Polylactide Foams have a range of potential applications, such as in construction, packaging, insulation, biomedical scaffolds, and others. However, processing and performance of PLA are not at the same level as other non-biodegradable resins. - Introduces the concepts behind foaming, poly(lactic acid) and PLA foaming - Supports further research and development in PLA foams by covering the state-of-the-art in different manufacturing and processing methods - Provides practical guidance for materials scientists and engineers in industry looking to replace traditional polymer resins with a sustainable, biodegradable alternative
Book Synopsis Handbook of Polymer Crystallization by : Ewa Piorkowska
Download or read book Handbook of Polymer Crystallization written by Ewa Piorkowska and published by John Wiley & Sons. This book was released on 2013-07-01 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric crystals are more complex in nature than other materials' crystal structures due to significant structural disorder present. The only comprehensive reference on polymer crystallization, Handbook of Polymer Crystallization provides readers with a broad, in-depth guide on the subject, covering the numerous problems encountered during crystallization as well as solutions to resolve those problems to achieve the desired result. Edited by leading authorities in the field, topics explored include neat polymers, heterogeneous systems, polymer blends, polymer composites orientation induced crystallization, crystallization in nanocomposites, and crystallization in complex thermal processing conditions.
Book Synopsis Cellulose Nanocomposites by : American Chemical Society. Meeting
Download or read book Cellulose Nanocomposites written by American Chemical Society. Meeting and published by . This book was released on 2006 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to cellulose nanocomposites; strategies for preparation of cellulose wiskers from microcrystalline cellulose as reinforcement in nanocomposites; self-assembly of cellulose nanocrystals: parabolic focal conic films; cellulose fibrils: isolation, characterization, and capability for technical applications; morphology of cellulose and its nanocomposites; useful insights into cellulose nanocomposites using raman spectroscopy; novel methods for interfacial modification of cellulose - reinforced composites; cellulose nanocrystals for thermoplastic reinforcement: effect of filler surface chemistry on composite properties; the structure and mechanical properties of cellulose nanocomposites prepared by twin screw extrusion; preparation and properties of biopolymer-based nanocomposites films using microcrystalline cellulose; nanocompusites based on cellulose microfibril; cellulose microfibers as reinforcing agents for structural materials; dispersion of soybean stock-based nanofiber in plastic matrix; polysulfone-cellulose nanocomposites; bacterial cellulose and its nanocomposites for biomedical applications.
Book Synopsis Numerical Investigation of the Flow Front Behavior in the Co-injection Molding Process by : Florin Ilinca
Download or read book Numerical Investigation of the Flow Front Behavior in the Co-injection Molding Process written by Florin Ilinca and published by . This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rubber Toughened Engineering Plastics by : A.A. Collyer
Download or read book Rubber Toughened Engineering Plastics written by A.A. Collyer and published by Springer Science & Business Media. This book was released on 1994-05-31 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rubber Toughened Engineering Plastics covers the main physical principles involved in optimum toughening in high temperature engineering plastics and speciality plastics and describes the synthetic strategies used to obtain satisfactorily toughened grades in these materials by control of microstructure. This book will act as a focus for current thought on the principles of rubber toughening and the methods employed for the rubber toughening of major engineering and speciality plastics.
Book Synopsis Open-cell Foaming with Injection Molding by : Raymond Kar Man Chu
Download or read book Open-cell Foaming with Injection Molding written by Raymond Kar Man Chu and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
