| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-pressure casting device by which a casting of high quality can be obtained. SOLUTION: The low-pressure casting device is provided with a die 20 and a molten metal holding furnace 30. The die 20 comprises a plurality of gates 25, 26 connected to a forming space. A crucible 32 in the molten metal holding furnace 30 is stored with a plurality of pots 33, 34, and the pots 33, 34 are stored with strokes 35, 36 connected to the gate 25, 26. A molten metal intake 51 is formed near the bottom parts of the pots 33, 34. By controlling the pressure in the pots 33, 34 to the negative one in a state where the molten metal intake 51 is opened, the molten metal in the crucible 32 is sucked into the pots 33, 34. Next, by feeding pressurized gas into the pots 33, 34 in a state where the molten metal intake 51 is closed, the molten metal in the pots 33, 34 is fed to the gates 25, 26. The suction operation and/or the pressurized gas feed operation to the plurality of pots 33, 34 is individually controlled. COPYRIGHT: (C)2007,JPO&INPIT
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