Process for die-casting light-weight metals
AssigneeAlusuisse Technology & Management Ltd.
InventorHans Thurner
Life of this patent
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Abstract
A process for die-casting aluminum and aluminum alloys is such that the molten metal is introduced into a filling chamber and injected from the filling chamber into a mold cavity by a piston. The mold cavity is evacuated in advance, after which it is flooded with oxygen. After flooding with oxygen and before injecting the molten metal into it, the mold cavity is again evacuated. Finally, the molten metal is injected into the hollow mold cavity. The process enables die-cast parts to be produced with low tendency to forming pores and blisters.
Claims6
A process for die-casting light-weight metals, wherein the molten metal is introduced into a filling chamber and injected from the filling chamber into a mold cavity by means of a piston, said process comprising:
- a) pre-evacuating the mold cavity;
- b) flooding the evacuated mold cavity with oxygen;
- c) further evacuating the mold cavity;
- and
- d) injecting molten metal into the mold cavity.
Dependencies are inferred from the claim text.