This 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. It explains the underlying principles of polymer science: the properties that are important to injection molding and their application to molding process development. 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: 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, giving 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. This third edition includes a completely new subchapter covering melt preparation, as well as much additional, revised, and updated material throughout the book. The revisions are deeply informed by the authors long and ongoing experience as a trainer, resulting in improved ways to conduct a study, perform experiments, or explain a concept.

Hersteller:
Carl Hanser Verlag GmbH & Co.KG
[email protected]
Kolbergerstr. 22
DE 81679 München

1 Introduction to Scientific Processing 2 Properties of Polymers and Plastics That Influence Injection Molding 3 Polymer Rheology 4 Plastic Drying 5 Common Plastic Materials and Additives 6 Injection Molding and Molding Machines 7 Scientific Processing, Scientific Molding, and Molding Parameters 8 Introduction to Process Development 9 Process Development Part 1: The Melt Preparation 197 10 Process Development Part 2: The 6-Step Study - Exploring the CosmeticProcess 11 Process Development Part 3: Exploring the Dimensional Process via Design of Experiments 12 Mold Qualification Flowchart, Production Release, and Troubleshooting 13 Role of Mold Cooling, Venting, and Regrind in Process Development 14 Related Technologies and Topics 15 Quality Concepts Appendix A Materials Data Sheet Appendix B Conversion Tables for Commonly Used Process Parameters Appendix C Water Flow Tables Appendix D Part Design Checklist Appendix E Mold Design Checklist Appendix F Mold Qualification Checklist Appendix G Regrind Tables - Percentage of Regrind in Total Shot Appendix H Calculation of Melt Density Index