Extrusion International 5-2018

56 Extrusion International 5/2018 EXTRUSION TOOLING Flow Dynamics of Extrusion Tooling* ABy Denis Finn, Product Development Engineer Guill Tool & Engineering, West Warwick, RI *Please keep in mind that the information contained in this article applies only to thermoplastics. Information presented in this article was derived from a recent conversation between Denis Finn and Bill Conley, Guill National Sales Manager, at company headquarters. Denis Finn discusses several problems that can affect the flowof polymers in an extrusion system. Among these are the strict product acceptance criteria, material degradation caused by several factors, differences in temperature between the thermocouple and the polymer, and other process issues. Material that’s been burnt due to dead spots