Abstract: An apparatus for the mixing of materials such as synthetic polymers and their additives. The apparatus comprises a casing which surrounds a cylindrical rotor. A series of groove rings are axially arranged in succession in the casing and have end surfaces placing the rings in abutting axial engagement with one another. These end surfaces of each groove ring may be integral therewith or may be provided by separate spacer rings. The grooves formed on the peripheral working surfaces of the groove rings are circumferentially separated by shearing lands and are limited in an axial direction by said end surfaces, said shearing lands and end surfaces defining said grooves as a series of individual closed chambers.

Abstract: An apparatus for the mixing of materials such as synthetic polymers and their additives. The apparatus comprises a casing which surrounds a cylindrical rotor. A series of groove rings and spacer rings are axially arranged on the rotor and in the casing. The grooves formed on the peripheral surface of the groove rings are circumferentially separated by shearing lands and are bound along their longitudinal side faces by the side faces of the alternately arranged spacer rings. In assembly, the grooves formed in the rotor groove rings are arranged in a partially overlapping, axially displaced relationship with respect to the radially opposed grooves formed on casing groove rings.