| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively and accurately reproduce predetermined degassing and bring about a sufficient degree of vacuum within a mold cavity.SOLUTION: A control apparatus controls a changeover valve to connect a degassing valve to a low-vacuum tank in a first-half period of an operation in which a plunger tip press-fits molten metal into a mold cavity and to connect the degassing valve to a vacuum tank in a second-half period. |
