During the die-casting process of aluminum alloy die-casting machine, only one speed of the pressure-feed metal liquid enters its mold, and its injection speed is only 1m ~ 2m / s during operation. With this process, there are many internal pores in the casting, and the structure is loose. It was soon improved to a two-stage injection. The injection process was simply decomposed into two stages, slow and fast, but the Vitesse ya mbangu ezalaki kaka 3m / s. komatisaka compacité ya ba parties ya die-casting, mpe kobakisa étape ya bomati ya pression sima ya malembe mpe mbangu, ekomi ba étapes misato ya injection ya malembe, injection ya mbangu mpe promotion, oyo ezali injection classique ya ba étapes misato.
