| 摘要 |
PCT No. PCT/CA93/00505 Sec. 371 Date Sep. 11, 1995 Sec. 102(e) Date Sep. 11, 1995 PCT Filed Nov. 24, 1993 PCT Pub. No. WO95/14567 PCT Pub. Date Jun. 1, 1995This invention relates to a device to compact parts with an undercut out of powder material having an upper die moveable relative a lower die, at least one upper punch associated with the upper die for relative movement therebetween, at least two lower punches associated with said lower die for relative movement therebetween, the lower punches defining a lower cavity with the lower die for filling with the powder material when the dies are in an open position, the upper die contacting the lower die in a closed position for movement of one of the lower punches towards the upper die so as to transfer the powder material towards the upper die and then to compact the powder material between the upper and lower punches with said dies in the closed position so as to produce said part; said dies moveable to an eject position for ejection of the compacted part.
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