| 摘要 |
PROBLEM TO BE SOLVED: To prevent that, when a powder in a cavity is compressed with a die composed in such a manner that an upper 1 punch whose tip side is divided to the circumferential direction is arranged at the outer circumference of an upper 2 punch, the divided parts on the tip side of the upper 1 punch open to the outside and interferes the die; and to reduce a die accident caused by the interference. SOLUTION: In the press die, independently from the upper 2 punch 2, the outside of the upper 1 punch 1 arranged at the outer circumference of the upper 2 punch is provided with a die guide 3, the guide part 3a at the tip of the die guide 3 is outwardly inserted into the outer circumference of the divided parts 1b on the tip side of the upper 1 punch 1, and the divided part 1b is constrained by the guide part 3a, thus the opening of the divided parts 1b to the outside is prevented. COPYRIGHT: (C)2007,JPO&INPIT
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