Global Patent Index - EP 1162014 A3

EP 1162014 A3 20020724 - 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

EP 1162014 A3 20020724 (EN)

Application

EP 01304835 A 20010601

Priority

JP 2000173006 A 20000609

Abstract (en)

[origin: EP1162014A2] 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

B21J 5/12; B21C 23/00; B21C 23/10; B21J 5/04; B21K 1/12; B21K 1/30

IPC 8 full level

B21J 5/06 (2006.01); B21C 23/00 (2006.01); B21C 23/10 (2006.01); B21J 3/00 (2006.01); B21J 5/04 (2006.01); B21J 5/12 (2006.01); B21K 1/12 (2006.01); B21K 1/30 (2006.01)

CPC (source: EP)

B21C 23/007 (2013.01); B21C 23/10 (2013.01); B21J 5/04 (2013.01); B21J 5/12 (2013.01); B21K 1/066 (2013.01); B21K 1/12 (2013.01); B21K 1/30 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

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