1. There should be an ideal speed change process in setting injection parameters, mold opening and closing stroke, mold protection pressure and so on to ensure the safe operation of the mold.
2. Set the low pressure protection pressure to 0, and then set the injection molding machine to low pressure manual. Close the mold repeatedly, see the required position (actual position) of low pressure of the mold, and increase 1% at a time with the minimum low pressure until the low pressure mold locks to high pressure, which is the low pressure protection pressure to be set.