Triple channel wave screw

Details Triple channel wave screw Triple channel wave screw

1993-02-08

1994-12-27

Simmons, David A.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

264349, 366 89, 366 90, B29B 742

Patent

active

053759923

ABSTRACT:
A plasticating apparatus having a barrel and a screw rotatably disposed therein. The screw has a mixing section including a helical conveying flight to form a helical passage for transporting resinous material along the screw. The mixing section further includes two helical divider flights, each spaced from the conveying flight to divide the helical passage into three channels of varying cyclic depth in the helical direction of the channels. The portions of minimum depth of the channels define wave crests which are helically displaced from each other.

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"Screw design improves plastication, doesn't add head to melt", PM&E, May, 1991.

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