EP 0281515 B1 19930811 - COOLING DEVICE FOR A PRESS FOR THE EXTRUSION OF LIGHT METALS
Title (en)
COOLING DEVICE FOR A PRESS FOR THE EXTRUSION OF LIGHT METALS
Publication
Application
Priority
CH 78487 A 19870302
Abstract (en)
[origin: US4829802A] To increase the extrusion speed for extrusion of light-weight metal such as aluminum, without incurring hot short cracks, or fissures, and retaining high-quality smooth surface of the extruded material, the region of the extrusion chamber immediately ahead of the extrusion die (3) is cooled by placing a cooling ring (12, 12') between the bore (9) of the extrusion cylinder in which the ram piston (13) operates. The cooling ring may be a unitary structure, or a multi-part structure, in which an independent inner ring is located within a cooling ring (12). For mechanical strength, a prestressing outer ring (20) is shrink-fitted around the cooling ring. The outer ring is retained, for example by screws (24), on the cylinder (2) within which the extrusion chamber (9, 10) is located. The cooling fluid may be water, a vaporizable liquid, or a gas, and is separated from the billet (1) within the extrusion chamber.
IPC 1-7
IPC 8 full level
B21C 29/00 (2006.01); B21C 29/04 (2006.01)
CPC (source: EP US)
B21C 29/00 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0281515 A2 19880907; EP 0281515 A3 19900829; EP 0281515 B1 19930811; AT E92799 T1 19930815; CA 1317910 C 19930518; DE 3883027 D1 19930916; JP H0436765 B2 19920617; JP S63230221 A 19880926; NO 167264 B 19910715; NO 167264 C 19911023; NO 880898 D0 19880301; NO 880898 L 19880905; US 4829802 A 19890516
DOCDB simple family (application)
EP 88810090 A 19880215; AT 88810090 T 19880215; CA 560168 A 19880301; DE 3883027 T 19880215; JP 4767288 A 19880302; NO 880898 A 19880301; US 16049688 A 19880224