EP 0795365 A1 19970917 - Process of making a fluid flow tube with varying cross section
Title (en)
Process of making a fluid flow tube with varying cross section
Title (de)
Verfahren zur Herstellung eines Strömungsrohres mit veränderlichem Querschnitt
Title (fr)
Procédé de fabrication d'un tube d'écoulement à section variable
Publication
Application
Priority
EP 96200712 A 19960314
Abstract (en)
A process for making a fluid tube (10) with a varying cross section comprising extruding a tube with a constant cross section, positioning the extruded tube in a die having substantially the cross section of the outer wall of the end tube and increasing the pressure inside the extruded tube, thereby deforming the tube, so that its outer wall confirms to the die form. The tube is a multiport extruded tube, in which the partition walls (16,17) are provided with at least one portion (19) with reduced thickness, the partition walls being broken during expansion. <IMAGE>
IPC 1-7
IPC 8 full level
B21C 37/15 (2006.01); B21C 37/16 (2006.01); B21C 37/20 (2006.01); B21D 26/02 (2011.01); B21D 26/033 (2011.01); F28D 1/047 (2006.01); F28F 1/02 (2006.01)
CPC (source: EP)
B21C 37/151 (2013.01); B21C 37/16 (2013.01); B21C 37/202 (2013.01); B21D 26/033 (2013.01); B21D 53/06 (2013.01); F28D 1/0478 (2013.01); F28F 1/022 (2013.01); F28F 1/025 (2013.01)
Citation (search report)
- [XA] DE 4425984 A1 19960125 - BAYERISCHE MOTOREN WERKE AG [DE], et al
- [A] JP H0327833 A 19910206 - SHOWA ALUMINUM CORP
- [A] US 4580324 A 19860408 - LASKA STANLEY T [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 015, no. 155 (M - 1104) 18 April 1991 (1991-04-18)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 96200712 A 19960314