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United States Patent 5593227
Douris , ê et al. January 14, 1997

Twin-shaft screw-type extruding machine having mixing elements with wings

Scheuring , Ê et al. January 14, 1997

Abstract

A twin-shaft screw-type extruding machine comprises a casing, shafts driven to rotate in the same direction of rotation and mixing elements facing each other and associated in pairs, which are disposed non-rotatably on the shafts. Each mixing element is a disk connected with a shaft. Mixing wings are provided at equal angular distances on the fronts, facing each other, of the disk and in the vicinity of the latter's respective circumference. A mixing wing of a mixing element and a mixing wing of the associated mixing element interengage and rotate past each other, while leaving a gap.