EP 1174198 A2 20020123 - Metal hollow member and method for manufacturing the same
Title (en)
Metal hollow member and method for manufacturing the same
Title (de)
Metallischer Hohlkörper und Verfahren zu seiner Herstellung
Title (fr)
Corps métalliques creux et procédé pour sa fabrication
Publication
Application
Priority
JP 2000201746 A 20000704
Abstract (en)
A metal hollow member having a plurality of hollow portions extending in a longitudinal direction thereof and communication apertures formed in a partitioning wall partitioning adjacent hollow portions is formed by: extruding a molten extrusion material through a die comprising a female die for forming an outer peripheral portion of the metal hollow member and a male die including a plurality of hollow-portion-forming protrusions corresponding to the plurality of hollow portions; and intermittently supplying fluid insoluble in the molten extrusion material into the partitioning wall from a bottom portion of a groove formed between the adjacent hollow-portion-forming protrusions while extruding the molten extrusion material, whereby the plurality of communication apertures are formed by fluid-released-apertures from which the fluid is released.
IPC 1-7
IPC 8 full level
B21C 23/08 (2006.01); B21C 23/00 (2006.01); B21C 23/10 (2006.01); B21C 25/00 (2006.01); B21C 25/08 (2006.01); B21C 37/15 (2006.01); F28F 1/02 (2006.01)
CPC (source: EP KR US)
B21C 23/08 (2013.01 - KR); B21C 23/10 (2013.01 - EP US); B21C 25/00 (2013.01 - EP US); B21C 25/08 (2013.01 - EP US); B21C 37/151 (2013.01 - EP US); F28F 1/022 (2013.01 - EP US); F28F 2250/04 (2013.01 - EP US)
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 1174198 A2 20020123; EP 1174198 A3 20020807; AU 5419501 A 20020110; CA 2352028 A1 20020104; CN 1330989 A 20020116; JP 2002018512 A 20020122; KR 20020004871 A 20020116; TW 495397 B 20020721; US 2002017372 A1 20020214
DOCDB simple family (application)
EP 01305723 A 20010702; AU 5419501 A 20010703; CA 2352028 A 20010703; CN 01120010 A 20010704; JP 2000201746 A 20000704; KR 20010039776 A 20010704; TW 90116323 A 20010703; US 89731101 A 20010702