| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable gas venting device for a die-casting die in which a shield valve is closed securely before molten metal arrives at it, without making the die-casting die larger. SOLUTION: When a sensor for a vacuum runner 3 has detected the molten metal 2, an injection control device 22 instantly reduces an injection speed of an injection piston 11 to a predetermined speed.
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