Title:
【発明の名称】成形工具
Document Type and Number:
Japanese Patent JP2651047
Kind Code:
B2
Abstract:
PCT No. PCT/DK94/00130 Sec. 371 Date Sep. 20, 1995 Sec. 102(e) Date Sep. 20, 1995 PCT Filed Mar. 28, 1994 PCT Pub. No. WO94/22607 PCT Pub. Date Oct. 13, 1994A deforming tool having a die and prestress ring for the extrusion of a workpiece. The prestress ring being constructed so that the radial prestress exerted by it on the die in a region of transition from one to the other of two converging inner faces of the die, which together form an internal angle of less than 180 degrees, and/or in the region of a sudden transition from a low to a high value of the pressure exerted by the workpiece during its deformation radially on the die, is less than in the regions adjacent to the transition.
Inventors:
GURENBEEKU IENSU
Application Number:
JP52156094A
Publication Date:
September 10, 1997
Filing Date:
March 28, 1994
Export Citation:
Assignee:
DANFUOSU AS
International Classes:
B21J13/02; B21C25/02; B30B15/02; (IPC1-7): B21C25/02
Domestic Patent References:
| JP63149011A | ||||
| JP57170818U |
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)