Check valve arrangement for the discharge end of an extruder, pl

Details Check valve arrangement for the discharge end of an extruder, pl Check valve arrangement for the discharge end of an extruder, pl

1983-12-20

1985-07-23

Woo, Jay H.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

2643281, 366 77, 425376A, 425564, B29F 102

Patent

active

045306052

ABSTRACT:
A check valve at the end of a plastifying worm for an extrusion or injection molding machine comprises a valve ring whose inner diameter is greater than that of a tip at the end of the head of the worm and which surrounds the neck connecting this tip with the valve seat of the worm. Spacers, preferably balls, are disposed between the ring and the tip and the surfaces of the ring and the tip flanking the balls are oriented to allow radial removal of the balls when the valve projects from the cylinder.

REFERENCES:
patent: 3209408 (1965-10-01), Kelly
patent: 3936038 (1976-02-01), Olmstead

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