Means for controlling feedstock compaction in forming flexible p

Details Means for controlling feedstock compaction in forming flexible p Means for controlling feedstock compaction in forming flexible p

1992-06-04

1994-11-22

Kuhns, Allan R.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

425 4C, 425147, 425148, 264 407, B29C 6722

Patent

active

053663659

ABSTRACT:
A process for making porous flexible pipes from two feed streams containing a thermoplastic material and a thermoset material, in which the feed streams are delivered to a die head extruder in a substantially compaction-free and segregation-free manner to insure that the feed composition in the extruder is substantially the same as the initial feed composition. The process can be automated so that an operator can manufacture porous flexible pipes of desired porosity and other rheological and mechanical characteristics by simply entering a command which will simultaneously adjust the process parameters such as the temperature and/or pressure inside the extruder, and the post-extrusion tension to meet the special need.

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