Patent ID: 6179460
Filing Date: 2001-01-30
Classification: B29B,B29C

Abstract:
A twin screw extruder (1) comprisinga casing (5) with a working direction (2);two partially intersecting casing bores (16, 17) disposed in the casing (5), which are parallel to each other;two shafts (22, 23), which comprise each an axis of rotation (20, 21), which are disposed in the casing bores (16, 17) and which are drivable to rotate in a same direction of rotation (18, 19) about the respective axis of rotation (20, 21), the axes of rotation (20, 21) having a distance A from each other; andsingle-flight kneading disks (25, 26), which are fixed on the shafts (22, 23) and have surface lines (27, 28) extending parallel to the respective axis of rotation (20, 21), the kneading disks (25, 26), in a cross-section perpendicular to the axis of rotation (20, 21), comprisinga crest (31), which is formed as a segment of a circle about the respective axis of rotation (20, 21) and which has a crest angle b and a radius R.sub.A ;a bottom (32), which is formed as a segment of a circle about the respective axis of rotation (20, 21) and has a bottom angle g and a radius R.sub.I ;two flanks (33), and which join the crest (31) and the bottom (32);R.sub.A >R.sub.I and A.apprxeq.R.sub.A +R.sub.I applying;wherein 0.degree..ltoreq.b.ltoreq.45.degree. applies to the crest angle b.