Sieve device for cleaning plastic melts

Details Sieve device for cleaning plastic melts Sieve device for cleaning plastic melts

1984-11-15

1986-10-28

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

With upstream screen or perforated plate for straining,...

210415, 210791, B29C 4517, B29C 4768

Patent

active

046196005

ABSTRACT:
A sieve device for cleaning plastic melts in a high-pressure press consists of a known plate-like housing. The housing has a flowthrough bore that constitutes part of the flow channel of the press. The housing also has a sieve disk positioned in the flowthrough bore. A sieve-cleaning mechanism rests against the sieve disk. The mechanism consists of a plate, which has several perforations and which projects to some extent out of the housing. It is mounted upstream of the disk inside the housing and can move in such a way that at least one perforation is always in the flow channel and at least one perforation is always outside the housing. Contamination on the upstream side of a disk is removed by shifting the perforation being employed at a given moment out of the housing.

REFERENCES:
patent: 4257901 (1981-03-01), Rapp
patent: 4479768 (1984-10-01), Kube et al.

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