Tubular extrusion apparatus and method

Details Tubular extrusion apparatus and method Tubular extrusion apparatus and method

B - Operations, Transporting

29

C

18/739

B29C 47/70 (2006.01) B29C 47/06 (2006.01) B29C 47/28 (2006.01)

Patent

CA 1141916

TUBULAR EXTRUSION APPARATUS AND METHOD ABSTRACT A flow distribution system for a side-fed tubular extrusion die improves the uniformity of resin distribution around the die annulus. The die has a toroidal chamber surrounding the die orifice into which the molten resin is fed from one side, and a plurality of ports through which the molten plastic flows out of that chamber toward the die annulus. The cross- sectional area of each of the ports is gradually increased from a point adjacent the entry of the molten resin to a maximum cross-section at a-point 180° from the resin entry point.

361847

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