Effect Of Shrinkage On The Design And Manufacture Of Plastic Parts In Injection Molding Using Cad Cam Techniques
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Effect Of Shrinkage On The Design And Manufacture Of Plastic Parts In Injection Molding Using Cad Cam Techniques
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Author : Deepak M. Shastri
language : en
Publisher:
Release Date : 1991
Effect Of Shrinkage On The Design And Manufacture Of Plastic Parts In Injection Molding Using Cad Cam Techniques written by Deepak M. Shastri and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with CAD/CAM systems categories.
Computer aided design software in injection molding has revolutionized injection molding in the design and manufacturing processes. Computer Aided Engineering can be applied to injection molding to increase the process efficiency, reduce part costs, and produce accurate parts in less time. The mold designer has many software programs to choose from to produce satisfactory mold designs from part geometries, and a correct selection can produce profitable results. A study of the need for and the scope of computers in injection molding is performed to evaluate the suitability of a CAE package by considering the value added to the parts using these techniques. The interactive nature of the programs is illustrated with examples and also the ability of the programs to perform simulations of the processes axe studied and the accuracy and reliability of the programs is considered. Evaluation of part shrinkage is very important to mold parts of required accuracy. The currently used methods in CAD mold design have one major drawback that mold designers experience. The variation in shrinkage coefficients for different resins cannot be compensated for and one cannot predict whether a specific part can be manufactured without warpage. Most CAD simulations cannot accurately predict the variation in shrinkage rates across all dimensions of a specific part. The factors influencing part shrinkage are studied and the variation of shrinkage with molding conditions is illustrated from previous experiments. A comprehensive plan is suggested to perform experiments to enable prediction of part shrinkage more accurately.
Handbook Of Molded Part Shrinkage And Warpage
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Author : Jerry Fischer
language : en
Publisher: William Andrew
Release Date : 2012-12-31
Handbook Of Molded Part Shrinkage And Warpage written by Jerry Fischer and has been published by William Andrew this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-31 with Technology & Engineering categories.
How easy life would be if only moldings were the same size and shape as the mold. But they never are, as molders, toolmakers, designers and end users know only too well. Shrinkage means that the size is always different; warpage often changes the shape too. The effects are worse for some plastics than others. Why is that? What can you do about it? The Handbook of Molded Part Shrinkage and Warpage is the first and only book to deal specifically with this fundamental problem. Jerry Fischer’s Handbook explains in plain terms why moldings shrink and warp, shows how additives and reinforcements change the picture, sets out the effect of molding process conditions, and explains why you never can have a single ‘correct’ shrinkage value. It goes on to demonstrate how to alleviate the problem through careful design of the molded part and the mold, and by proper material selection. It also examines computer-aided methods of forecasting shrinkage and warpage. And most important of all, the Handbook gives you the data you need to work with. Authoritative and rooted in extensive industrial experience, the expert guidance contained in this handbook offers practical understanding to novices, and new insights to readers already skilled in the art of injection molding and mold making Contains the answers to common problems and detailed advice on how to control mold and post-mold shrinkage and warpage Case Studies illustrate and enrich the text; Data tables provide the empirical data that is essential for success, but hard to come by
Injection Molding Handbook
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Author : D.V. Rosato
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Injection Molding Handbook written by D.V. Rosato and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
This third edition has been written to thoroughly update the coverage of injection molding in the World of Plastics. There have been changes, including extensive additions, to over 50% of the content of the second edition. Many examples are provided of processing different plastics and relating the results to critiCal factors, which range from product design to meeting performance requirements to reducing costs to zero-defect targets. Changes have not been made that concern what is basic to injection molding. However, more basic information has been added concerning present and future developments, resulting in the book being more useful for a long time to come. Detailed explanations and interpretation of individual subjects (more than 1500) are provided, using a total of 914 figures and 209 tables. Throughout the book there is extensive information on problems and solutions as well as extensive cross referencing on its many different subjects. This book represents the ENCYCLOPEDIA on IM, as is evident from its extensive and detailed text that follows from its lengthy Table of CONTENTS and INDEX with over 5200 entries. The worldwide industry encompasses many hundreds of useful plastic-related computer programs. This book lists these programs (ranging from operational training to product design to molding to marketing) and explains them briefly, but no program or series of programs can provide the details obtained and the extent of information contained in this single sourcebook.
Intelligent Optimization Of Mold Design And Process Parameters In Injection Molding
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Author : Mehdi Moayyedian
language : en
Publisher: Springer
Release Date : 2018-11-02
Intelligent Optimization Of Mold Design And Process Parameters In Injection Molding written by Mehdi Moayyedian and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-02 with Technology & Engineering categories.
This book describes an effective framework for setting the right process parameters and new mold design to reduce the current plastic defects in injection molding. It presents a new approach for the optimization of injection molding process via (i) a new mold runner design which leads to 20 percent reduction in scrap rate, 2.5 percent reduction in manufacturing time, and easier ejection of injected part, (ii) a new mold gate design which leads to less plastic defects; and (iii) the introduction of a number of promising alternatives with high moldability indices. Besides presenting important developments of relevance academic research, the book also includes useful information for people working in the injection molding industry, especially in the green manufacturing field.
Designing With Plastics
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Author : P. R. Lewis
language : en
Publisher: iSmithers Rapra Publishing
Release Date : 1993
Designing With Plastics written by P. R. Lewis and has been published by iSmithers Rapra Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Technology & Engineering categories.
In this report Dr Lewis surveys the current state of the art in designing with plastics, in terms of materials properties and processing technologies. He also considers the legal implications of intellectual property and product liability, as well as ergonomic and aesthetic design, parts consolidation and recyclability. His review is supported throughout by references to key processes and applications, including many well known consumer products, and further information can be derived from the 435 abstracts of published papers which complete the report.
Designing With Plastics And Composites A Handbook
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Author : Donald Rosato
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-18
Designing With Plastics And Composites A Handbook written by Donald Rosato and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-18 with Technology & Engineering categories.
For some time there has been a strong need in the plastic and related industries for a detailed, practical book on designing with plastics and composites (reinforced plastics). This one-source book meets this criterion by clearly explaining all aspects of designing with plastics, as can be seen from the Table of Contents and Index. It provides information on what is ahead as well as today's technology. It explains how to interrelate the process of meeting design performance requirements with that of selecting the proper plastic and manufacturing process to make a product at the lowest cost. This book has been prepared with an awareness that its usefulness will depend greatly upon its simplicity. The overall guiding premise has therefore been to provide all essential information. Each chapter is organized to best present a methodology for designing with plastics and composites. of industrial designers, whether in engineering This book will prove useful to all types or involved in products, molds, dies or equipment, and to people in new-product ventures, research and development, marketing, purchasing, and management who are involved with such different products as appliances, the building industry, autos, boats, electronics, furniture, medical, recreation, space vehicles, and others. In this handbook the basic essentials of the properties and processing behaviors of plastics are presented in a single source intended to be one the user will want to keep within easy reach.
Software Sustainable Analysis Of Injection Molding Process For Shrinkage In Wood Plastic Composites With Pecan Shell
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Author : Victor Hugo Cruz Macias
language : en
Publisher:
Release Date : 2017
Software Sustainable Analysis Of Injection Molding Process For Shrinkage In Wood Plastic Composites With Pecan Shell written by Victor Hugo Cruz Macias and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Polymer sustainability is in the spotlight in the industry of this globalized world. Since most of the plastics are made out petroleum, means that are not nor compostable nor biodegradable. Wood Plastic Composites (WPC) are cutting edge materials. WPC consist of wood fibers embedded in a petrochemical matrix, increasing stability and stiffness of composite materials compared to pure plastics. Manufacturing process condition affects directly to the quality of production, and the problems that are in the spotlight is the shrinkage. When polymer cools down from melt conditions to room temperature, the part volume reduction is called shrinkage, and this phenomenon is associated with material behavior. A non-uniform change of internal stresses causes warpage, which is a part defect. The most critical of these defects are shrinkage and warpage, because not only affects appearance but it also functionality. The geometry of parts is being affected by shrinkage and, and the principal factors for shrinkage are mold and melt temperature, packing pressure, packing time, cooling time, injection velocity, injection time, injection pressure, gate location, runner type, and so on. Three critical parameters are employed in this study for been considered critical process parameters that have a high impact on the shrinkage of molded parts. Therefore, mold temperature, melt temperature and cooling system design are used as critical factors for the shrinkage defect of the injection molding parts. This study aims to obtain a temperature and cooling system model as well as to observe the effect of the temperature and cooling system design on the shrinkage defect. NX and Moldex 3D software packages are used for thermal, flow, and cooling system analysis to observe the effects of temperature and cooling design on these defects. Improving previous models of mold and cooling systems lead to better results. The thickness of the mold, velocity and Reynolds number of coolant and location of the cooling channels are the main improvements on the design. Improving these factors, temperature decreases and the efficiency of the cooling system increases. Results show the effect of temperature and cooling system on volumetric shrinkage. Volumetric shrinkage improves and results show the proposed methodology works well in cooling system design and prediction work.
Computer Aided Injection Mold Design And Manufacture
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Author : J.Y.H. Fuh
language : en
Publisher: CRC Press
Release Date : 2004-08-02
Computer Aided Injection Mold Design And Manufacture written by J.Y.H. Fuh and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-08-02 with Technology & Engineering categories.
Examining processes that affect more than 70 percent of consumer products ranging from computers to medical devices and automobiles, this reference presents the latest research in automated plastic injection and die casting mold design and manufacture. It analyzes many industrial examples and methodologies while focusing on the algorithms, implementation procedures, and system architectures that will lead to a fully automated or semi-automated computer-aided injection mold design system (CADIMDS). This invaluable guide in this challenging area of precision engineering summarizes key findings and innovations from the authors' many years of research on intelligent mold design technologies.
Spe Antec 2001 Proceedings
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Author : Spe
language : en
Publisher: CRC Press
Release Date : 2001-05-07
Spe Antec 2001 Proceedings written by Spe and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-05-07 with Technology & Engineering categories.
Conference proceedings from 'Antec 2001' held on 6-10 May 2001 in Dallas, Texas. This includes the Volume III topic of Special Areas Color and Appearance Division.
A Plastic Injection Molding Part Feature Extractor And Design Advisory System
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Author : Sagil James
language : en
Publisher:
Release Date : 2010
A Plastic Injection Molding Part Feature Extractor And Design Advisory System written by Sagil James and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Improving plastic injection molded part design is one of the most challenging tasks over past few years. The impact of plastics on the environment has enhanced the interest in this field. An improvement in plastic product design requires expert manufacturing knowledge to be fed to the designer at the initial design stage itself. This can be accomplished by integrating Design for Manufacturing (DFM) rules with a CAD based Plastic injection molding feature extraction module. This research presents a novel methodology to extract manufacturing features from a plastic injection molded part. The geometric model of the part is converted to a IGES format. The B-Rep model of the part is subsequently regenerated from the IGES file and the relevant features are recognized using a rule-based feature extraction technique. Since the feature extractor uses the CAD neutral IGES file format, it does not require the part to be designed using feature-based design technique. Another important contribution of this research is the development of a methodology to provide design recommendations to the part design using an automated design advisory system. The design advisory system uses a knowledge base of DFM rules, collected from various sources in order to provide design advices. Both the feature extraction and design advisory methodology developed is verified on different plastic injection molded parts.