Filter screen pack for extrusion die

Details Filter screen pack for extrusion die Filter screen pack for extrusion die

1997-05-28

2000-11-28

Pyon, Harold

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Filter cleaning

210107, 2103331, 425197, 425199, B01D 3516, B29C 4768

Patent

active

06153093&

ABSTRACT:
The filter intercepts dirt emanating from a molten-polymer extruder. The filter is clamped between perforated support plates, and a rotor sweeps the holes in the upstream plate. The rotor defines a cavity which communicates with a small sector of the holes at any one time. The cavity is openable to drain, via a valve. The melt is under high pressure, to which the cavity is exposed. The rotor is rotated by a drive-shaft, and the drain is located co-axially with the drive-shaft.

REFERENCES:
patent: 4057379 (1977-11-01), Sato
patent: 4752386 (1988-06-01), Schulz et al.
patent: 4849113 (1989-07-01), Hills
patent: 4973406 (1990-11-01), Ponzielli
patent: 5141631 (1992-08-01), Whitman
patent: 5462653 (1995-10-01), Hills

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