Method of using a multiple gating nozzle

Details Method of using a multiple gating nozzle Method of using a multiple gating nozzle

1997-10-20

1999-10-26

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

2643288, B29C 4516, B29C 4520

Patent

active

059722584

ABSTRACT:
A method and apparatus for runnerless injection molding of plastic materials utilizing a novel valve stem for controlling the opening and closing of at least two gates in a single injection nozzle. The method and apparatus includes at least two separate melt streams whose flows are not obstructed by the valve stem. These melt streams may contain the same plastic material or different plastic materials and the injection nozzle may be either simultaneously or sequentially activated for filling the mold cavity.

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