Patent ID: 7040798
Filing Date: 2006-05-09
Classification: B29B,B29C

Abstract:
1. A multi-screw extruder for continuously machining and/or molding bulk material, the extruder comprising: an extruder casing including: a plurality of screws running parallel to an axial direction of the extruder, the plurality of screws arranged in a screw ring inside a radially expanded axial area of the cavity, the radially expanded axial area being proximate the feed port, the radially expanded axial area extending along a portion of the screw ring in a peripheral direction of the screw ring, and narrowing from the first axial area where the feed port is situated, along the axial direction of the extruder, to an unexpanded axial area, the axially parallel screws guided by the concave circular segments, the machining elements of the screws proximate an inside or outside of the screw ring; wherein each of the screws carries a number of axially consecutive machining elements, the machining elements intermeshing with adjacent screws, a portion of the machining elements being conveying elements.