Feed bushing for single-screw extruders

Details Feed bushing for single-screw extruders Feed bushing for single-screw extruders

1982-04-02

1984-03-27

Jenkins, Robert W.

Agitating

With heating or cooling

366 79, 366349, 165 47, 165169, B01F 1506

Patent

active

044390416

ABSTRACT:
A feed bushing for single-screw extruders for the plasticizing extrusion of plastics under a high inertia resistance comprising an outer casing, a grooved bushing enclosed in the outer casing, and a cooling system. The groove bushing is assembled from a tubular grooved inset and a tubular reinforcement surrounding the grooved inset, the inset being shrink-fitted into the reinforcement with such a high shrinkage allowance that the inset is prestressed for pressure by the reinforcement for withstanding the maximum forces of inertia of the screw received in the grooved bushing. The grooved inset of the grooved bushing is made of cemented carbide, a metal oxide or other extremely hard and wear-resistant material. The reinforcement element is made of high-strength ductile steel.

REFERENCES:
patent: 2200997 (1940-05-01), Royle
patent: 3375549 (1968-04-01), Geyer
patent: 3900188 (1975-08-01), Seufert
patent: 4136969 (1979-01-01), Meyer

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