EP 1162014 A2 20011212 - Pressure controlled fluid pressure extrusion method
Title (en)
Pressure controlled fluid pressure extrusion method
Title (de)
Verfahren zum druckgesteuerten, hydraulischen Druckstrangpressen
Title (fr)
Procédé d'extrusion par pression hydraulique à pression controlée
Publication
Application
Priority
JP 2000173006 A 20000609
Abstract (en)
The lower part of a material blank to be molded forms a lower seal (9) with a die (2). A punch (3) applying a molding force to the material forms an upper seal (7) with the perimeter of the die. The space between the upper and lower seals (9) forms a pressure chamber (6) that is filled with a fluid. As the punch descends into the die, the fluid is pressurized. The lower seal (9) is a complete seal to prevent leakage of fluid into the die. The upper seal is given a clearance with the die that permits controlled leakage of fluid therepast at a rate that limits the maximum pressure in the pressure chamber while permitting the development of an adequate pressure on the material being molded. <IMAGE>
IPC 1-7
IPC 8 full level
B21C 23/00 (2006.01); B21C 23/10 (2006.01); B21J 3/00 (2006.01); B21J 5/04 (2006.01); B21J 5/06 (2006.01); B21J 5/12 (2006.01); B21K 1/12 (2006.01); B21K 1/30 (2006.01)
CPC (source: EP US)
B21C 23/007 (2013.01 - EP US); B21C 23/10 (2013.01 - EP US); B21J 5/04 (2013.01 - EP US); B21J 5/12 (2013.01 - EP US); B21K 1/066 (2013.01 - EP US); B21K 1/12 (2013.01 - EP US); B21K 1/30 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1162014 A2 20011212; EP 1162014 A3 20020724; EP 1162014 B1 20050323; CA 2343685 A1 20011209; CA 2343685 C 20060704; DE 60109519 D1 20050428; DE 60109519 T2 20060413; JP 2001347336 A 20011218; JP 3707768 B2 20051019; US 2001049955 A1 20011213
DOCDB simple family (application)
EP 01304835 A 20010601; CA 2343685 A 20010411; DE 60109519 T 20010601; JP 2000173006 A 20000609; US 82769901 A 20010406