Metal deforming – Tool and/or tool holder
Patent
1997-01-31
1998-09-29
Larson, Lowell A.
Metal deforming
Tool and/or tool holder
761071, B21D 3701
Patent
active
058132767
ABSTRACT:
There are provided a press die of cement composite characterized in that a punch and a blank holder comprise respective cut portions of a punch and blank holder forming member formed by transfer using a master model or by shaving a hardened body block and a method of producing a press die of cement composite charactareized in that a punch and blank holder forming member is formed by transfer using a master model or shaving a hardened body block and said punch and blank holder forming member is separately cut along an outline of a punch while starting from an extending hole provided in said punch and blank holder forming member at a position corresponding to one point of said outline to form the punch and a blank holder, respectively.
According to the press die of the invention and the method of producing the press die of the invention, since the punch and the blank holder can be simultaneously formed, the production steps can be reduced and the production time can be shortened. In addition thereto, the facing portions of the punch and the blank holder assembled with each other have a uniform clearance provided therebetween and therefore the press die of high accuracy can be provided.
REFERENCES:
patent: 2175139 (1939-10-01), Wilkie
patent: 3154664 (1964-10-01), Zeder, Jr.
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