Patent ID: 7134312

Claim:
A die apparatus for a pressing machine, comprising: a lower die securely loadable in a lower die holder fastened to a bolster side of a pressing machine such that the lower die is extractable upwards; a lower die lifting mechanism which is provided below the lower die and which is operable to lift up the lower die until it lies higher in position than an upper face of the lower die holder; an upper die set which is adapted to be held in an upper die holder by a stopper mechanism that is engageable with the upper die set to hold the upper die set in place in the upper die holder and that is disengageable from the upper die set to allow the upper die set to disengage from the upper die holder such that the upper die set is extractable downwards from the upper die holder; and an upper die mounting and demounting jig which is adapted to be removably positioned on the raised lower die lifting mechanism after the lower die is removed from the lower die lifting mechanism, such that the upper die mounting and demounting jig lies coaxially with the lower die lifting mechanism.