Powder metallurgy processes – Forming articles by uniting randomly associated metal particles – Consolidation of powders
Patent
1982-07-21
1985-03-19
Schofer, Joseph L.
Powder metallurgy processes
Forming articles by uniting randomly associated metal particles
Consolidation of powders
428553, 72262, 72270, B22F 302, B22F 704, B21C 2301
Patent
active
045058784
ABSTRACT:
In a continuous friction-actuated process for the extrusion of copper, a passageway 3 is formed between an arcuate first member and a second member in the form of a wheel 1 having a circumferential groove 2 formed in its peripheral surface into which groove the first member projects. The wheel is rotated and metal is fed into the passageway at one end and extrudes from the passageway through at least one die orifice 6 located in or adjacent to an abutment member 5 extending across the passageway at the other end thereof. The abutment member is of substantially smaller cross-section than the passageway so as to leave a substantial gap between the abutment member and the groove. Particulate copper is first fed under such conditions that at least a substantial proportion of the copper extrudes through the clearance y between the abutment and the groove surface and adheres to the wheel until the copper so extruded forms a complete lining 8 in the groove, and thereafter copper rod is fed for the remainder of the extrusion operation.
REFERENCES:
patent: 3911705 (1975-10-01), Voorhes
patent: 4055979 (1977-11-01), Hunter et al.
patent: 4101253 (1978-07-01), Etherington
patent: 4362485 (1982-12-01), Slater et al.
patent: 4397622 (1983-08-01), Childs et al.
Pardoe-Recent Developments in "Conform"-Continuous Extrusion Technology, Research Disclosure, Mar. 1981, No. 203, Item No. 20342, (Havant, Hampshire, England).
Childs John B.
Fairey Norman R.
BICC Public Limited Company
Schofer Joseph L.
Teskin F.
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