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Low-pressure casting apparatus

  • US 5,791,398 A
  • Filed: 07/05/1996
  • Issued: 08/11/1998
  • Est. Priority Date: 07/07/1995
  • Status: Expired due to Fees
First Claim
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1. A low-pressure casting apparatus for casting molten metal into a casting mold, into which a large capacity of molten metal is to be cast, in addition to a casting mold of a small capacity, by pressurizing molten metal contained in a crucible, and by casting the molten metal through a stalk into the casting mold said casting apparatus comprising:

  • a die base on which the mold 29 is mounted, at least two furnaces for holding molten metal, each having a crucible, the capacity of which crucible to accommodate the molten metal is smaller than that of said casting mold, into which a large capacity of molten metal is to be cast, and which crucible is disposed in the furnace, and a pressure chamber,at least two transport cars, which are equipped with elevator means for carrying and moving up and down each of the holding furnaces, and which can move each of the holding furnaces 16 and each of the elevator means to a position just under the casting mold,at least two stalks, mounted on the holding furnaces 16, for making each of the crucibles communicate with a cavity of the casting mold via a press-contacting mechanism,pressurized-gas supply means for supplying a pressurized gas to each pressure chamber of the holding furnaces, at least two connecting mechanisms, detachably mounted on the holding furnaces, for communicably connecting the supply means with the pressure chamber of their respective holding furnaces, andcommunication mechanisms for making the pressure chambers of the holding furnaces communicate with one another.

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