Automobile and motorcycle: automobile aluminum die, auto parts die casting die, precision die casting die, aluminum/zinc/magnesium die casting die. The basic process of die casting is: the liquid metal first fills the mold cavity at low speed or high speed. The mold has a movable cavity surface. It is pressurized forged with the cooling process of the liquid metal, which not only eliminates the shrinkage defects of the blank, but also enables the internal organization of the blank to reach the broken grain in the forged state. The comprehensive mechanical properties of the blank have been significantly improved.