Cooler-extruder device

Details Cooler-extruder device Cooler-extruder device

1988-11-25

1990-09-25

Jenkins, Robert W.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366 83, 366144, 366291, 366312, B29B 106

Patent

active

049589334

ABSTRACT:
A novel plastic extruder is taught which employs a compound feed screw having both a flights' section, and a wiper section adjacent thereto. The compound feed screw is positioned in a jacketed extruder barrel through which a foam plastic melt is propelled and cooled by means of a coolant circulated through the jacket, or other cooling means, prior to being forced through a die to form a cellular plastic sheet. The flights' section of the feed comprises a helical spiral ridge machined on a rotatable shaft, while the wiper section comprises a plurality of wiper blade assemblies mounted longitudinally on pairs of spaced apart, raised circular ridges, machined on the shaft, adjacent wiper blade assemblies being mounted radially displaced relative to each other.

REFERENCES:
patent: 2191349 (1940-02-01), Erickson
patent: 3029615 (1962-04-01), Lindsey
patent: 3069866 (1962-12-01), Dunn
patent: 3070836 (1963-01-01), DeHaven
patent: 3145017 (1964-08-01), Thomas
patent: 3163403 (1964-12-01), Engels
patent: 3779522 (1973-12-01), Loomans
patent: 3848289 (1974-11-01), Bachmann
patent: 3958968 (1976-05-01), Hosaka
patent: 4095307 (1978-06-01), Brubaker
patent: 4127372 (1978-11-01), Perla
patent: 4134714 (1979-01-01), Driskill

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