Extrusion is a process used for the creation of fixed cross-sectional profiles. Materials, such as plastic or thermoplastic, are pressed through a die of desired shape and cross-section. Plastic ...

Editor?s note: Chris Rauwendaal is a designer, consultant, and seminar instructor who has written extensively on process engineering and extrusion topics. Part 1 of this article (PM&A Nov./Dec. 2002) ...