Processors today generally use three different kinds of purging compounds: chemical; abrasive; and non-abrasive. Purging compound options are widely used in the plastics industry, with traditional ...

Operators can then feed one or two barrel capacities of purging material into the extruder. The operator should start purging at low screw speed. After material begins coming out from the head, the ...

Purging between molds and material changes is time consuming and seems costly for molders. But is it a necessary evil? It’s necessary because molds and molding systems must be purged of residue ...