Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – Within pressurizing chamber
Patent
1985-06-12
1987-01-20
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
Within pressurizing chamber
366 75, 366 81, 366293, 425209, B29B 710
Patent
active
046377905
ABSTRACT:
Plasticating extruders in which increased melting effectiveness is attained through multiple stages including at least one inner screw conveyor within an outer screw conveyor in a barrel for receiving unmelted solid material from the channel of the outer screw conveyor and conveying the received unmelted solid material in the channel of the inner conveyor in a direction parallel to and axially coextensive with the direction of travel of the material in the channel of the outer screw conveyor and melting the received unmelted solid material to bring melted material to a downstream location where the melted material from both channels merges to deliver a flow of fully melted material to a downstream discharge outlet. A vent may be located in the barrel in the vicinity where material enters the channel of the inner screw conveyor for improved venting as a result of the diversion of material away from the vent.
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Fortenberry J.
Scientific Process & Research, Inc.
Woo Jay H.
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