Capsules and pressings for extruding objects, particularly tubes

Details Capsules and pressings for extruding objects, particularly tubes Capsules and pressings for extruding objects, particularly tubes

1979-10-26

1983-08-30

Hunt, Brooks H.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428558, 419 41, 419 42, B22F 300

Patent

active

044017235

ABSTRACT:
This invention relates to a capsule for pressings pressed by isostatic pressure and to these pressings used for extruding metallic objects, particularly tubes, of stainless steel, the outer and inner wall of the capsule consisting of thin-walled sheet metal, and at least the outer wall having substantially the same strength properties in the axial direction over its circumference and particularly consisting of a spiral-welded tube and being preferrably provided with a bulge which is directed outwardly against the shrinkage occurring during isostatic pressing, and at least on the front end of the capsule an insert being provided, which consists of one or more pieces of a ductile solid material or a ductile material pressed from powder. The invention further relates to a process for the production of such capsules and pressings and to a process for extruding tubes and to the tubes obtained according to this process.

REFERENCES:
patent: 3631583 (1972-01-01), Haller
patent: 3632243 (1972-01-01), Mott
patent: 3753704 (1973-08-01), Manilla et al.
patent: 3803702 (1974-04-01), Bratt
patent: 4038738 (1977-08-01), Fischmeister et al.
patent: 4143208 (1979-03-01), Aslund
Popper, Isostatic Pressing 1976, Heyden & Son Ltd. TS245p6 pp. 33-43.

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