| 摘要 |
PROBLEM TO BE SOLVED: To improve a die casting apparatus by using an oxygen-replacing die casting method, with which a high quality die cast product can be produced. SOLUTION: The oxygen gas is filled up into a cavity C and an injection sleeve 16 by using an oxygen gas supplying device 80, and after purging inner parts in the cavity C and the injection sleeve 16 with the oxygen gas, portions having the possibility of infiltrating the outer air into the cavity C, for example, an auxiliary reducing pressure tank B and a third opening/closing valve SV for performing the reduced pressure exhausting from a fixed die flowing path 2c and a moving die flowing path 3c, and a main reducing pressure tank TA and a first opening/closing valve MV for performing the pressure reduction in the cavity C are simultaneously and parallel driven. COPYRIGHT: (C)2006,JPO&NCIPI
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