The book does well to cover all the important aspects of this complex materials processing technology and goes into as much detail as needed to provide the reader with a clear understanding of the underlying science without resorting to complicated mathematical analysis.

Osswald’s coverage of injection molding materials and processing pays particular attention to the relationship between molecular weight and resulting material behavior. Of particular interest is the section on anisotropy development during processing, which gives the reader critical insight into residual stress development and warpage.

Chris Rauwendaal brings his enormous experience in screw behavior to help the reader understand this important but often neglected aspect of the injection molding process. Details include mechanisms of mixing in the screw and nozzle design. 

Bob Farrell’s treatment of the molding machine is complete, with extensive
treatment of clamp design including design calculations and a special discussion on tie-rod design.

John Beaumont’s chapter on mold design and part design provides guidelines and insight to aid the practitioner in this art.

This sets the stage for Turng’s examination of derivative molding processes such as gas-assisted injection, microcellular injection molding, multi-material molding and powder injection molding processes—less well understood, complex processes that are nonetheless important because of their extensive use in modern molding operations. The book also provides practical guidelines for trouble-shooting processing and material problems.


Paul Gramann, Tim A. Osswald and Tom Turng. Marcel Dekker, Inc.: New York, 1994. ISBN# 0-8247-8964-4. 

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- Reviewed by Hubert Lobo. Hubert Lobo is President of DatapointLabs, and a former CIMP member. Lih-Sheng (Tom) Turng was a student of Prof. K.K. Wang and also a member of CIMP. He is now an Associate Professor at the University of Wisconsin-Madison.