Multi-shaft screw-type extruder, in particular twin-shaft extruder
AssigneeKrupp Werner & Pfleiderer GmbH
InventorsErwin Haring, Gerhard Weihrich, Ulrich Burkhardt
Life of this patent
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Abstract
A multi-shaft screw-type extruder having a casing with two parallel intersecting casing bores and two shafts drivably disposed in the casing bores. Screw elements intermeshing kneading disks are fixed on the shafts The widths of the respective crest portions of the kneading disks are smaller than the disk width and form mixing-and-scraping-studs on the periphery of the disks. The mixing-and-scraping-studs on each kneading disk are axially misaligned relative to each other such that their peripheral faying surfaces jointly cover the entire disk width.
Claims12
A multi-shaft screw-type extruder, comprising
- a casing (2);
- at least two parallel and partially intersecting casing bores (42, 43);
- at least two shafts (3, 4) disposed in the casing bores (42, 43) and drivable to rotate in one of the same and the counter direction;
- screw elements (11, 17, 23, 26) fixed on the shafts (3, 4);
- intermeshing kneading disks (13), which are fixed on the shafts (3, 4), said disks having a disk width (B) and crest portions (30, 30') located in a periphery of the kneading disks (13);
- and
- mixing-and-scraping-studs (32, 32') formed by the respective crest portions (30, 30'), said studs (32,32') have a smaller width than said disk width (B), and said studs having peripheral faying surfaces (33),
- wherein the mixing-and-scraping-studs (32, 32') on each kneading disk (13) are misaligned in an axial direction such that the peripheral faying surfaces (33) of the mixing-and-scraping-studs (32) jointly cover the entire disk width (B) of each kneading disk (13).
Dependencies are inferred from the claim text.