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    • 88. 发明公开
    • METAL CASTING DEVICE AND METAL CASTING METHOD USING THE SAME
    • 金属铸造和本所使用的金属铸造
    • EP1252950A1
    • 2002-10-30
    • EP00900135.5
    • 2000-01-07
    • Nissin Dental Products, Inc.
    • MIYAKE, MatsuyukiKUWAMURA, Yasuhiko Neo Corporase Shimanouchi A-404
    • B22D21/02B22D21/06B22D23/00A61C13/20
    • B22D21/02A61C13/20
    • The invention provides an apparatus suitable for casting a metal having a high melting point and a method of casting a metal using the apparatus.
      In an apparatus for casting a metal in accordance with the present invention, a crucible (2), a casting mold (3) and an electrode rod (10) for an arc discharge are provided in an interior portion of a casting chamber (1) capable of controlling a pressure, a supporting shaft (6) exists in a side of an outflow end portion of the crucible (2) close to a charging port (5) of the casting mold (3), the crucible (2) can be tilted around the supporting shaft (6), a crucible tilting means (7) exists in a side of a non-outflow end portion of the crucible (2), a clearance between a metal and the electrode rod is kept substantially constant after the arc melting of the metal (4) on the crucible (2) is started and the melting of the metal (4) makes progress and until the metal (4) in the melting state drops down due to the tilting of the crucible (2), and the arc discharge is kept during a period that the metal (4) flows and drops down. At this time, it is preferable to connect a pressure reduction pump (12) and a pressurized gas supply source (13) to the casting chamber (1), make a gas supply pressure P 1 having a controlled pressure larger than a gas pressure P 2 required for casting, and shut off the supply of the pressurized gas at a time of getting to the gas pressure P 2 .