Extrusion control process and apparatus

Details Extrusion control process and apparatus Extrusion control process and apparatus

1986-06-26

1987-06-09

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling rate of movement of molding material or its...

264 401, 425135, 425145, 425162, B29G 4792, B29C 4710

Patent

active

046719083

ABSTRACT:
In an extrusion process, desired product quality parameters are maintained very accurately by manipulating the rotational speed of the screw associated with the extrusion process so as to maintain a desired ratio of feed rate to drag flow in the extrusion process and by manipulating the feed rate of the material to the extrusion process so as to maintain a desired energy input per unit of the material being processed.

REFERENCES:
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patent: 4448736 (1984-05-01), Emery et al.
patent: 4510104 (1985-04-01), Weaver et al.
PTC Report #305, Phillips Chemical Co., "Extrusion Screws for K-Resin".
Liptak, B. G., "Instrument Engineer's Handbook", Process Control, 1985, p. 789.

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