Shrinkage ensures that the size is always different and warpage often changes the shape too. The effects for some plastics are worse than others, but not for the same reasons. This is the first and only handbook to deal with these fundamental problems. The book is written in a way that makes it seem like an expert is standing next to you. It explains in plain terms why moldings shrink and warp, shows how additives and reinforcements change the picture, sets out the effects of the molding process conditions, and reveals why you never can have a single “correct” shrinkage value. The handbook shows you how to alleviate problems by careful design of the molded part and the mold, careful selection of materials, and proper process techniques. It examines computer-aided methods of forecasting shrinkage and warpage. And, most important of all, the handbook provides representative data to work with. This is the most comprehensive collection of shrinkage data ever compiled in a book and includes hard-to-find multi-point information on how materials, part design, mold design, processing, and post mold treatment affect the part’s shrinkage and warpage.

Contents Include:
Introduction to Plastics Processing; Shrinkage and Warpage; Causes of Part Variation – Part Design; Causes of Part Variation – Mold Design; Causes of Part Variation – Processing; Factors Affecting Post-Mold Shrinkage; How to Control Mold and Post-Mold Shrinkage and Warpage; Computer Analysis; Case Studies; Data.