Degassing apparatus for mold

Details Degassing apparatus for mold Degassing apparatus for mold

B - Operations, Transporting

22

D

349/31, 22/49

B22D 17/32 (2006.01) B22D 17/14 (2006.01) B22D 46/00 (2006.01)

Patent

CA 2004157

Abstract of the Disclosure A degassing apparatus for a mold includes a degassing valve, an acoustic wave detecting unit, and a valve closing unit. The degassing valve is located at an end portion of a degassing passage extending from a mold cavity. The acoustic wave detecting unit is arranged midway along the degassing passage and detects an acoustic wave generated when a molten metal collides against a wall surface of the passage, and thereby detecting passing of the molten metal. The valve closing unit closes the valve when a detection signal level is higher than a reference signal level.

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