Extrusion

Details Extrusion Extrusion

1976-12-10

1978-07-18

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Means for molding powdered metal

Continuous length product formation

425224, 425376R, B22F 318

Patent

active

041012534

ABSTRACT:
Extrusion apparatus comprising a wheel having a circumferential groove around its outer edge. A fixed shoe member bearing against the edge of the wheel has a die member projecting into the circumferential groove. Material to be extruded is fed into the circumferential groove below the shoe member. The wheel is rotated relative to the shoe member so that the material is carried along the circumferential groove by frictional drag towards the die member and is extruded through an orifice in the die member. Conventiently the wheel is formed from three abutting discs, the center disc having a diameter less than that of the two outer discs whereby to form the circumferential groove.
The material to be extruded can be in the form of a metal powder. The wheel is arranged to rotate about a horizontal axis and the shoe member is disposed beneath the wheel whereby powder can be fed under gravity into the groove. The powder can be compacted into a continuous strip before entering into the groove between the shoe member and the wheel by arranging a driven roller to project into the groove in the wheel immediately in front of the shoe member.

REFERENCES:
patent: 3689209 (1972-09-01), Vinogradov et al.
patent: 3765216 (1973-10-01), Green

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