PELLETIZING SCREW EXTRUDER Russian patent published in 2016 - IPC B28B3/22 B29C43/00 

FIELD: machine building.

SUBSTANCE: invention relates to processing of high-concentration polydisperse compositions by feedthrough pressing method and can be used in whatever industries. Pelletizing screw extruder comprises a screw, multichannel press-tool and body with a bush. On the inner surface of the bush there are sheaf-like reefs with wide trapezoidal base at the reef bottom and outer divergent part with rounded side walls and adjustable interface radius. In the reefs there are detachable elastic inserts made without cavities, one-cavity or multiple-cavity with constant or variable cross-section area of cavities in transverse and/or in lengthwise direction.

EFFECT: technical result is increased retention capacity of reefs due to wider range of varying inserts elasticity, reduced number of forced press stops because of break-down of mass from the reefs, wider permitted range of pliability of different-composition and -physical and mechanical properties polydisperse compositions processed on the same pelletizing screw extruder, reduced costs due to easy operational replacement of set of elastic inserts without replacement of a corrugated bush in maintenance and readjustment of the press for forming various compositions.

1 cl, 4 dwg, 2 ex