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OwnerHelmut Bacher, Georg Wendelin +1inventors
InventorsHelmut Bacher, Georg Wendelin, Helmuth Schulz
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An apparatus for filtering thermoplastic synthetic plastic material has a screw (5) bearingly supported within a housing (1) for rotation around its longitudinal axis for the transport and preferably also plasticizing of the synthethic plastic material. This material is supplied to the screw (5) through an intake opening (7) into the housing (1) and leaves the housing (1) through an exit opening (8). The screw (5) is subdivided into two sections (9, 10) disposed one behind the other in axial direction. A filter (40) provided with penetration openings (25) is disposed in the flow of the synthetic plastic material that is disposed between these two sections (9, 10), which filter (40) is disposed within the housing (1) between the two sections (9, 10) of the screw (5) so that it subdivides the interior of the housing. The filter (40) is connected for common rotation with at least one of the screw sections (9, 10). At least one scraper (26) mounted in the housing (1) engages the upstream side of the filter (40) and strips off coarse impurities from the filter when the filter (40) is rotated and conveys the impurities into a collecting space (27) that is in connection with the interior of the housing.
Apparatus for removing impurities from thermoplastic synthetic plastic material, having a screw bearingly supported within a housing for rotation around its longitudinal axis for transporting the synthetic plastic material from an intake opening to an exit opening of the housing, the screw being subdivided into first and second screw sections axially disposed one behind the other, a filter for removing the impurities from the plastic material disposed inside the housing and between the first and second sections so that it subdivides an interior of the housing, the filter including penetration openings through which the synthetic plastic material passes and being connected for common rotation with at least one of the screw sections, and a scraper arranged in the housing positioned on an upstream side of the filter, the scraper being adapted to scrape off coarse impurities from the filter when the filter rotates and convey the impurities into a collecting space connected to the interior of the housing.
Apparatus for removing particulates from thermoplastic synthetic plastic material comprising a screw rotatably supported in a housing for transporting the synthetic plastic material from an intake opening to an exit opening of the housing, the screw including first and second screw sections axially disposed one behind the other, a filter for removing the particulates from the plastic material, disposed inside the housing and between the first and second sections, the filter including penetration openings extending substantially parallel to an axis of the screw sections, permitting passage of the synthetic plastic material and rotating with at least one of the screw sections, and a scraper positioned on an upstream side of the filter for removing the particulates from an upstream side of the filter as it rotates and conveying the particulates into a collecting space.
Dependencies are inferred from the claim text.