PROCESS FOR DIE-CASTING LIGHT-WEIGHT METALS

摘要

A process for die-casting aluminium and aluminium alloys is such that the molten metal (20) is introduced into a filling chamber (16) and injected from the filling chamber (16) into a mould cavity by means of a piston (24). The mould cavity (14) is evacuated in advance after which it is flooded with oxygen, and after the flooding with oxygen and before injecting the molten metal (20) into it, is again evacuated. Finally the molten metal (20) is injected into the hollow mould cavity (14). The process enables die-cast parts to be produced with low tendency to forming pores and blisters.