Category Archives: Uncategorized

Black Specks, Identify and Correct Black specks in tubing or pipe, espe­cially in light-colored or clear plastics— lead to scrap, unscheduled shutdowns, and unhappy customers.  Specks can also cause holes or post-process failures in tube or pipe as it continues … Continue reading →

Spiral Manifold History Spiral manifold melt flow technology was brought about by the need to eliminate the historic problem of knit lines (or weld lines) in the walls of extruded tubular products made using conventional spider-style extrusion dies. Spider-style extrusion … Continue reading →

Modern extruders usually have three or more temperature control zones along the barrel length.  These can be individually set to precise temperatures to optimize the extrusion process.  However, there are no firm guidelines on how to select the best processing … Continue reading →

Safety is something many take for granted.  The Society of the Plastics Industry says 2000+ acci­dents occur in the plastics industry each year. The majority are from workers falling, getting caught in machinery, and electrical accidents. The attitude that “it … Continue reading →

  When a melt pump is the method selected for die pressurization and metering, the extruder and all upstream equipment will be contributing to the polymer melt properties.   When an extrusion system’s output is not completely driven by the … Continue reading →