EP 0281591 B1 19910123 - PROCESS DEVICE AND SHEATH FOR PRODUCING PIPES OR SIMILAR ELONGATED PROFILES BY POWDER METALLURGY
Title (en)
PROCESS DEVICE AND SHEATH FOR PRODUCING PIPES OR SIMILAR ELONGATED PROFILES BY POWDER METALLURGY
Publication
Application
Priority
SE 8603686 A 19860903
Abstract (en)
[origin: WO8801547A1] A process and device for producing pipes or similar elongated profiles by powder metallurgy. A thin-walled sheath is filled with a metal and/or metal-alloy powder, if necessary after the powder has been pre-compressed by vibration or a similar process. The thin-walled sheath is then closed and cold- and/or warm-pressed by all-round isostatic pressure and the compact produced is further treated, especially by extrusion. To form a tubular compact, the sheath filled with powder (3) is centrally holed (bore 26) by a spike (4, 5) at the same time as the powder (3) is radially pressed from the inside to the outside, after the sheath has been closed (lid 9; 9'; 9'') and subjected to isostatic pressure. The sheath is composed of a cylindrical outer casing (8), a bottom part (14) and a lid (9; 9'; 9'').
IPC 1-7
IPC 8 full level
B22F 3/20 (2006.01); B22F 5/00 (2006.01); B22F 5/10 (2006.01); B22F 5/12 (2006.01)
CPC (source: EP US)
B22F 3/20 (2013.01 - EP US); B22F 5/10 (2013.01 - EP US); B22F 2998/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT SE
DOCDB simple family (publication)
WO 8801547 A1 19880310; EP 0281591 A1 19880914; EP 0281591 B1 19910123; JP H031361 B2 19910110; JP S63502840 A 19881020; SE 8603686 D0 19860903; US 4935198 A 19900619
DOCDB simple family (application)
EP 8700498 W 19870903; EP 87905747 A 19870903; JP 50535187 A 19870903; SE 8603686 A 19860903; US 18833588 A 19880429