Plastic and nonmetallic article shaping or treating: processes – Miscellaneous
Patent
1996-11-04
1998-08-25
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Miscellaneous
2641761, 26421121, 425206, 425208, 4253761, B29C 4738, B29C 4764
Patent
active
057980772
ABSTRACT:
A plasticating screw and method of plasticating without thermal degradation problems. Said screw having a metering section with a helical flight disposed within and cooperating with the innerwall of a heated barrel. In particular, solid resinous material is introduced to a helical valley extending between said flight. The resinous material is heated and plasticized by said apparatus while being advanced along a helical path towards an outlet opening by the rotation of said screw. The bottom surface of the helical valley in said metering section having a plurality of geometrically shaped surfaces in side-by-side relation with at least two of said shaped surfaces being sloped. During operation, the level differential between the shaped surfaces induces a continuous tumbling, variable shear and mixing action upon the molten resin as the molten resin in the metering section flows along the helical path.
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Colby Paul N.
White Harry F.
Womer Timothy W.
Eashoo Mark
Herberger, Esquire Robert J.
Silbaugh Jan H.
Spirex Corporation
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