Can not open the mold, see if it is because of improper mold adjustment, too tight mold locking, too long mold locking time, mold temperature and other reasons. Due to the different die thickness, the die casting machine with mechanical hinge mode locking is adjusted by the die adjusting mechanism. In the state, the speed and pressure of mold opening are often not enough to open the mold. In addition, when the mold is heated and expanded, the thermal expansion leads to an additional increase in clamping force, which makes it difficult to open the mold.