Thin walled high velocity propagation of foamed thermoplastic re

Details Thin walled high velocity propagation of foamed thermoplastic re Thin walled high velocity propagation of foamed thermoplastic re

1989-10-06

1991-07-16

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

26421121, 366 81, B29C 4764

Patent

active

050320734

ABSTRACT:
An improved extrusion structure and techniques for obtaining very high extrusion speeds based upon the use of higher extrusion temperatures and resulting increase in critical extrusion rates. Structure is provided for eliminating back flow of the extrudate, for continuously mixing the extrudate just prior to entering the extruding die, and for controlling the temperature of the extrudate at critical locations along the path of flow.

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