EP 0010510 B1 19830831 - IMPROVEMENT IN METHODS AND DEVICES FOR THE CONTINUOUS HYDROSTATIC EXTRUSION OF METALS
Title (en)
IMPROVEMENT IN METHODS AND DEVICES FOR THE CONTINUOUS HYDROSTATIC EXTRUSION OF METALS
Publication
Application
Priority
FR 7829852 A 19781012
Abstract (en)
[origin: US4343169A] An improved continuous hydrostatic extrusion process and apparatus for metals is disclosed. In order to reduce the leaks of viscous fluid through the clearances between the rotor and the stator, which clearances are necessary for operation of the apparatus, the drive fluid used in the groove of the rotor to cause forward movement of the blank is of a higher viscosity than the fluid in the isostatic chamber in which extrusion pressure is present. The pumping power is acccordingly greatly reduced and it is possible to avoid the use of expensive and delicate pressure multiplying means.
IPC 1-7
IPC 8 full level
B21C 23/00 (2006.01); B21C 23/21 (2006.01)
CPC (source: EP US)
B21C 23/005 (2013.01 - EP US); B21C 23/008 (2013.01 - EP US)
Citation (examination)
- FR 2128843 A1 19721020 - ATOMIC ENERGY AUTHORITY UK
- FR 2310813 A1 19761210 - TREFIMETAUX [FR]
- FR 2373339 A1 19780707 - TREFIMETAUX [FR]
Designated contracting state (EPC)
DE GB SE
DOCDB simple family (publication)
EP 0010510 A1 19800430; EP 0010510 B1 19830831; BE 879340 A 19800411; CA 1123382 A 19820511; CH 633732 A5 19821231; DE 2966114 D1 19831006; FR 2438508 A1 19800509; FR 2438508 B1 19810227; IT 1123790 B 19860430; IT 7926383 A0 19791010; JP S5557320 A 19800428; JP S5622404 B2 19810525; LU 81781 A1 19800507; PL 124902 B1 19830331; PL 218852 A1 19800616; US 4343169 A 19820810; YU 245479 A 19830121; ZA 795430 B 19800924
DOCDB simple family (application)
EP 79420047 A 19791009; BE 197584 A 19791011; CA 337357 A 19791011; CH 916579 A 19791011; DE 2966114 T 19791009; FR 7829852 A 19781012; IT 2638379 A 19791010; JP 13128179 A 19791011; LU 81781 A 19791011; PL 21885279 A 19791010; US 8103779 A 19791001; YU 245479 A 19791010; ZA 795430 A 19791011