PELLETISING SCREW EXTRUDER Russian patent published in 2014 - IPC B29B9/06 

FIELD: process engineering.

SUBSTANCE: pelletising screw extruder relates to processing of high-concentration polydisperse compositions of higher viscosity by extrusion and can be used in whatever industries. Proposed extruder comprises housing, screw and multichannel extruder with inner surface facing the material flow and provided with extruding channels with converging intake parts. Converging intake parts of peripheral extruding channels located at recess of multichannel extruding part between housing inner surface and said multichannel extruder form a complex geometrical surface. Extruder inner surface facing the material flow follows the screw shank shape. Extruding channels have converging intake parts of whatever shape of figure of revolution aligned with cylindrical parts at different angles to extruder central axis in the planes tangential to axial cross-sections of said extruder in centres of extruding channels. Angles of channels inclination increase as they move from central channels with zero inclination.

EFFECT: decreased loses and number of rejects.

4 dwg