FIELD: machine building.
SUBSTANCE: invention is related to extrusion of materials and may be used in processing industries of agricultural complex. Extruder comprises body, two screws in the form of shafts with helical thread and bearing unit of screw shafts. Bearing unit includes race attached to body and internal bushes. Bushes are fixed on screw shafts with the possibility of axial and circumferential motions relative to race. Holes for pressed materials are available on bushes. Helical thread of shaft in each screw may be located at a distance to race, equal to 0.5 - 2.5 of screw radius. At the same time each shaft is arranged with a gradual reduction of diametre in direction of pressed material flow.
EFFECT: improved reliability and durability of extruder, reduced power inputs.
4 cl, 3 dwg
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