Improvements in processing thermoplastic synthetic materials in mixing and kneading machines

摘要

930,828. Mixing appliances. BADISCHE ANILIN- & SODA-FABRIK A.G. Aug. 23, 1960, No. 29065/60. Class 86. [Also in Group V] The screw 3 of a screw extractor or kneading machine for processing thermoplastic synthetic material has a non-threaded end 4 extending from the cylinder 1 into an eccentric cylindrical chamber 2 of larger diameter than the cylinder 1. The material leaving the screw 3 is thus compressed between the end 4 and the wall of the chamber 2 before being discharged through an outlet 6 disposed at a part of the chamber wall close to the end 4. The screw 3 is reciprocated axially whilst it is rotated. A further outlet 8 is connected to a source of suction for the removal from the chamber 2 of volatile constituents of the thermoplastic material.