Extruder screw tip and associated flow channel

Details Extruder screw tip and associated flow channel Extruder screw tip and associated flow channel

2005-05-03

2005-05-03

Colaianni, Michael P. (Department: 1732)

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Agitator or kneader comprises means rotating about a...

C264S211210, C366S089000

Reexamination Certificate

active

06887062

ABSTRACT:
A screw nose for a rubber extruder screw has an upstream portion of increasing diameter providing working engagement of the rubber flowing from the screw with the extruder barrel and a downstream portion of decreasing diameter providing working engagement of the rubber with a converging tapered wall of a flow channel block for reducing the shrinkage and pressure drop at the discharge end of the screw and thereby prevent porosity and blisters in an extruded rubber component.

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patent: 6547431 (2003-04-01), Womer

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