B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
205/13, 13/17
B21C 23/08 (2006.01) B22F 3/12 (2006.01) B22F 3/20 (2006.01)
Patent
CA 1120005
- 2 - A b s t r a c t This invention relates to a capsule for pressings pressed by isostatic pressure and to these pressings used for extruding metallic objects, particularly tubes, of stain- less steel, the outer and inner wall of the capsule con- sisting 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 pro- vided, 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 pro- duction of such capsules and pressings and to a process for extruding tubes and to the tubes obtained according to this process.
338386
Dkerman Dke
Dslund Christer
Eriksson Hans
Flodin Benny
Tornberg Claes
Fetherstonhaugh & Co.
Granges Nyby Ab
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