Method for manufacturing elongated bodies by extrusion of powder

Details Method for manufacturing elongated bodies by extrusion of powder Method for manufacturing elongated bodies by extrusion of powder

1981-04-20

1983-06-14

Larson, Lowell A.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 28, 419 48, 419 49, B22F 500, F16H 700

Patent

active

043880541

ABSTRACT:
A method for manufacturing elongated dense bodies of metals or metal alloys by extrusion of a powder charge enclosed in a metal capsule. A closed, powder-filled capsule is heated to a temperature necessary for bonding the charge under pressure, and the capsule is then inserted in a pressure chamber and surrounded by a layer of a solid, readily deformable material, such as talcum powder or pyrophyllite. A piston is inserted into the pressure chamber and subjects the capsule and the surrounding material to a pressure such that the capsule and the surrounding material are pressed out together through an opening in a die. Tubes can also be extruded, with the deformable packing material filling the tube bore.

REFERENCES:
patent: 3645728 (1972-02-01), Hrinevich, Jr.
patent: 3723109 (1973-03-01), Cairns et al.
patent: 3834002 (1974-09-01), Sissons et al.
patent: 3871200 (1975-03-01), Onoda et al.
patent: 3892030 (1975-07-01), De Pierre et al.

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