| 摘要 |
PROBLEM TO BE SOLVED: To mold a molding with level differences at the edge face in which thin parts and thick parts are coexistent without causing a wide density difference in an integrated die by sufficiently releasing packing powder for the thin parts in powder molding. SOLUTION: In the powder molding method where powder A is packed into a cavity 7 formed at the inside of a die 1, the powder A is pressed by a lower first punch 4 and a lower second punch 5, and an upper punch 3 in confronted arrangement so as to obtain the molding with the step differences at the edge face in which thick parts and thin parts are coexistent, the compression of the powder A is performed using a die 1 provided with a recessed part 8 to form into a release part for the powder in the cavity, the die 1 is pulled down when the upper punch 3 thrushes to the die 1, and the edge face with the step differences in the molding is molded by the upper punch or the lower punch having a molding face with the step differences. COPYRIGHT: (C)2007,JPO&INPIT
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