Process for bending pipes

Details Process for bending pipes Process for bending pipes

B - Operations, Transporting

29

C

B29C 53/08 (2006.01) B29C 53/82 (2006.01)

Patent

CA 2064468

Abstract In a process for bending tubes, which can be deformed or bent preferably when heated, in which the tube to be bent is possibly warmed, an internal support is introduced and the bending operation is carried out. Before bending, a tubular inner sheath (3) which can be expanded to a given extent is introduced into the tube (1) to be bent and filled with a pressurized medium, so that the entire surface of the inner sheath is in contact with the inner wall of the tube (1), which is then bent. The device for carrying out the process comprises a flexible, insertable pressure tube (3) made of a material which expands under pressure. Closure pieces (5,6) whose outer diameter is not greater than the inner diameter (12) of the tube (1) to be bent are mounted on the ends of the pressure tube (3).

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