Robust Process Development and Scientific Molding
Robust Process Development and Scientific Molding

Author: Suhas Kulkarni

Publisher: Hanser

Published: 2017

Total Pages: 367

ISBN-13: 9781569905869

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The book introduces the reader to the concepts of Scientific Molding and Scientific Processing for Injection Molding, geared towards developing a robust, repeatable, and reproducible (3Rs) molding process. The effects of polymer morphology, thermal transitions, drying, and rheology on the injection molding process are explained in detail. The development of a robust molding process is broken down into two sections and is described as the Cosmetic Process and the Dimensional Process. Scientific molding procedures to establish a 3R process are provided. The concept of Design of Experiments (DOEs) for and in injection molding is explained, providing an insight into the cosmetic and dimensional process windows. A plan to release qualified molds into production with troubleshooting tips is also provided. Topics that impact a robust process such as the use of regrind, mold cooling, and venting are also described. Readers will be able to utilize the knowledge gained from the book in their day-to-day operations immediately. The second edition includes a completely new chapter on Quality Concepts, as well as much additional material throughout the book, covering fountain flow, factors affecting post mold shrinkage, and factor selections for DOEs. There are also further explanations on several topics, such as in-mold rheology curves, cavity imbalances, intensification ratios, gate seal studies, holding time optimization of hot runner molds, valve gated molds, and parts with large gates. A troubleshooting guide for common molded defects is also provided. With the purchase of this book, you also receive a free personal access code to download the eBook.

Injection Molding
Injection Molding

Author: Rong Zheng

Publisher: Springer Science & Business Media

Published: 2011-06-21

Total Pages: 194

ISBN-13: 3642212638

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This book covers fundamental principles and numerical methods relevant to the modeling of the injection molding process. As injection molding processing is related to rheology, mechanical and chemical engineering, polymer science and computational methods, and is a rapidly growing field, the book provides a multidisciplinary and comprehensive introduction to the subjects required for an understanding of the complex process. It addresses the up-to-date status of fundamental understanding and simulation technologies, without losing sight of still useful classical approaches. The main chapters of the book are devoted to the currently active fields of flow-induced crystallization and orientation evolution of fiber suspensions, respectively, followed by detailed discussion of their effects on mechanical property, shrinkage and warpage of injection-molded products. The level of the proposed book will be suitable for interested scientists, R&D engineers, application engineers, and graduate students in engineering.

Precision Injection Molding
Precision Injection Molding

Author: Jehuda Greener

Publisher: Hanser Publications

Published: 2006

Total Pages: 354

ISBN-13:

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One of the key aspects of the production of high precision components is the need to meet extremely tight dimensional tolerances, typically in the submicron range, and maintain these tolerances over the practical lifetimes of the molded articles. In addition, as many of the precision components are utilized in various optoelectronic systems and devices, control of optical and electrical properties is often crucial. The strict control of dimensional and electro-optical properties requires a systematic reexamination of the conventional injection-molding process with special consideration of its impact on the dimensions and electro-optical characteristics of the molded article. This volume examines precision injection molding from different perspectives, covering materials, process and hardware aspects of the technology, with special emphasis on the dimensional integrity and stability of the molded components. Special topics covered in this volume include: dimensional stability of molded plastics, models for warpage development, compact disc molding, process control, crystallization phenomena in injection molding, micro-molding and microfluidics.

Injection Molding Handbook
Injection Molding Handbook

Author: Tim A. Osswald

Publisher: Hanser Gardner Publications

Published: 2008

Total Pages: 764

ISBN-13: 9781569904206

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The Injection Molding Handbook provides engineers, professionals and other involved in this important industry sector with a thorough up-to-date overview of injection molding processing equipment and techniques, including the basic fundamental information on chemistry, physics, material science and process engineering. It covers all components of the injection molding machine and the various process steps. Topics directly affecting injection molding, such as material selection, process control, simulation, design and troubleshooting complete this reference book for the injection molder. The updated second edition handbook presents a well-rounded overview of the underlying theory governing the various injection molding processes without loosing its practical flavor.

Plastic Part Design for Injection Molding
Plastic Part Design for Injection Molding

Author: Robert A. Malloy

Publisher:

Published: 2011

Total Pages: 549

ISBN-13: 9783446404687

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The goal of the book is to assist the designer in the development of parts that are functional, reliable, manufacturable, and aesthetically pleasing. Since injection molding is the most widely used manufacturing process for the production of plastic parts, a full understanding of the integrated design process presented is essential to achieving economic and functional design goals. Features over 425 drawings and photographs.

Custom Molding of Thermoset Elastomers
Custom Molding of Thermoset Elastomers

Author: Bernie Stritzke

Publisher: Carl Hanser Verlag GmbH Co KG

Published: 2012-11-12

Total Pages: 204

ISBN-13: 3446433457

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The book covers chemistry of thermoset elastomers, but only to the extent needed for understanding how to process them through a manufacturing environment and how they react in various manufacturing methods. The focus of the book is to provide in-depth coverage of tooling, processing, and secondary operations that can improve manufacturing efficiencies. Detailed and easy to understand diagrams display specific conditions and how they can be improved upon. Innovative ideas and solutions are shared and discussed. 1. Introduction to Rubber Chemistry 2. Compounding, Mixing and Equipment 3. Materials 4. Product Design 5. Material Testing for Rubber 6. Polymer Flow 7. Molding Methods 8. Compression Molding 9. Transfer Molding 10. Injection Molding 11. LSR 12. Secondary Operations and Additional Methods 13. Rubber Molding Processing

A Practical Approach to Scientific Molding
A Practical Approach to Scientific Molding

Author: Gary F. Schiller

Publisher: Carl Hanser Verlag GmbH Co KG

Published: 2024-01-15

Total Pages: 184

ISBN-13: 1569902569

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This easy-to-understand guide provides the necessary information to implement a scientific molding program. It is a hands-on reference for people on the molding floor, including those previously lacking theoretical background or formal education. The book covers how the injection molding machine prepares the plastic and understanding of plastic flow. The functions of the main machine components are explained and understanding of correct procedures and testing is developed. Each step of the process is clearly explained in a step-by-step manner, and simple examples of important calculations are provided. The practical approach is augmented by useful guides for troubleshooting and machine set-up. An Excel spreadsheet with a process test and a machine performance test is available as bonus material. The 2nd edition has various updates, improvements, and corrections throughout. Contents 1. Injection Unit: Screw 2. Injection Unit: Barrel 3. Clamping Unit 4. Ejectors/Controllers, Human Machine Interface (HMI) 5. Machine Performance Testing 6. Process Development Test 7. Plastic Temperature 8. Plastic Flow 9. Plastic Pressure (Pack/Hold) 10. Cooling 11. Benchmarking the Injection Molding Process 12. Process Troubleshooting 13. What is Important on a Set-Up Sheet? 14. Commonly Used Conversion Factors and Formulas 15. Machine Set-Up 16. Things That Hurt the Bottom Line of a Company 17. Terms and Definitions

Polymer Processing
Polymer Processing

Author: Jean-François Agassant

Publisher: Carl Hanser Verlag GmbH Co KG

Published: 2017-08-07

Total Pages: 873

ISBN-13: 1569907056

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Engineering of polymers is not an easy exercise: with evolving technology, it often involves complex concepts and processes. This book is intended to provide the theoretical essentials: understanding of processes, a basis for the use of design software, and much more. The necessary physical concepts such as continuum mechanics, rheological behavior and measurement methods, and thermal science with its application to heating-cooling problems and implications for flow behavior are analyzed in detail. This knowledge is then applied to key processing methods, including single-screw extrusion and extrusion die flow, twin-screw extrusion and its applications, injection molding, calendering, and processes involving stretching. With many exercises with solutions offered throughout the book to reinforce the concepts presented, and extensive illustrations, this is an essential guide for mastering the art of plastics processing. Practical and didactic, Polymer Processing: Principles and Modeling is intended for engineers and technicians of the profession, as well as for advanced students in Polymer Science and Plastics Engineering.

Rigidity Theory and Applications
Rigidity Theory and Applications

Author: M.F. Thorpe

Publisher: Springer Science & Business Media

Published: 2006-04-11

Total Pages: 435

ISBN-13: 0306470896

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Although rigidity has been studied since the time of Lagrange (1788) and Maxwell (1864), it is only in the last twenty-five years that it has begun to find applications in the basic sciences. The modern era starts with Laman (1970), who made the subject rigorous in two dimensions, followed by the development of computer algorithms that can test over a million sites in seconds and find the rigid regions, and the associated pivots, leading to many applications. This workshop was organized to bring together leading researchers studying the underlying theory, and to explore the various areas of science where applications of these ideas are being implemented.