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US 4,784,207 AGranted
Apparatus for vacuum melting and casting
AssigneeMario Di Maio S.p.A.
InventorEliseo Di Maio
Life of this patent
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Abstract
An apparatus for lost-wax castings wherein metal is melted in a vacuum vessel, and wherein there are provided vacuum pumps for producing a higher degree of vacuum around the mold during the casting of the molten metal.
Claims5
Apparatus for casting comprising:
- a bell;
- a furnace contained in the bell for metal melting;
- a mold having gas-permeable walls;
- a vessel within the bell for receiving said mold for casting molten metal;
- means for inserting said mold into said vessel without lifting said bell;
- means for inclining said furnace for flowing molten metal into said mold received in said vessel;
- means for producing a first level of vacuum inside said bell for removing gas pockets from molten metal;
- means for producing a second level of vacuum, higher than said first level, inside said vessel substantially contemporaneous with inclining of said furnace for evacuating through said gas-permeable walls of the mold gases that form when molten metal touches said walls of said mold.
5 more elements
Dependencies are inferred from the claim text.