| 摘要 |
A progressive mold is provided to perform precise processing by bending a base material while pressing the base material against a die. A progressive mold comprises an upper die holder(40) including an upper die retainer(44) having a bending punch(46), a lower die retainer(14) in which a die(18) corresponding to the bending punch is movably mounted, a driving pin(48) which is installed on the upper retainer and ascended and descended together with the upper holder, and a seesaw cam(20) which is installed on the lower retainer via a connection pin and has a seesaw motion. One end of the seesaw cam is pressed down with the driving pin to push up the die before a hammering punch strikes the die, so that a base material(m) placed on the die is pressed against the bending punch and the bending punch is inserted into a groove(18') of the die to bend the base material.
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