The machine working pressure, the pressing speed, the scope of the itinerary may need to carry on the adjustment according to the process. And the constant pressure to complete and scheduled two-way process, constant pressure the craft way. To have after the suppression guarantees pressure and time delay to be automatic return action. Optional accessories: photoelectric protection device. Stroke, pressure, time digital display system. Hydraulic system heating, cooling device. Plc programmable controller, blanking buffer device, mould heating and temperature control device, in die with floating guide and rolling bracket, etc.