| 摘要 |
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.
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