Patent ID: 7820039
Filing Date: 2010-10-26
Classification: B01D,B29C

Abstract:
1. An apparatus for the continuous filtering of impurities from a plastic melt, comprising a filter insert in the form of a hollow rotary body held to rotate about a rotational axis of the filter insert relative to a housing, wherein the plastic melt flows through the filter insert, the filter insert is arranged in a flow conduit of the housing between a feed conduit for the plastic melt to be filtered and a discharge conduit for the filtered plastic melt, and a discharge apparatus for impurities held back by the filter insert, said discharge apparatus comprising a feed screw cooperating with the filter insert, wherein the filter insert comprises a disk-like filter arranged on a face side of the hollow rotary body and coaxial to the rotational axis, wherein the feed screw is optionally arranged with multiple threads and comprises a first scraper set against the disk-like filter, wherein the discharge apparatus further comprises at least one second scraper arranged behind the feed screw in a direction of rotation of the filter insert and pressed against the disk-like filter, and wherein the feed conduit opens into a ring conduit, the ring conduit guiding the filtrate to the disk-like filter and tapering towards the disk-like filter in the direction of rotation of the filter insert.