Mold cavity gas removal system with gas flow indicator

Details Mold cavity gas removal system with gas flow indicator Mold cavity gas removal system with gas flow indicator

1988-03-29

1989-06-13

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

164305, 164410, 425420, 425812, B22D 1770

Patent

active

048383384

ABSTRACT:
A gas removal system for a mold cavity of a die casting or other molding machine includes a vacuum line connecting the mold cavity to a vacuum pump when a valve therebetween is open to evacuate gas from the mold cavity prior to injection of molten material therein and further includes a gas flow indicator disposed in the vacuum line between the valve and vacuum pump. The gas flow indicator includes a mechanical flapper movable in a particular manner in response to evacuation of gases from the mold cavity and in another noticeably different manner when little or no gas is evacuated from the mold cavity as a result of the valve being improperly closed. The flapper is visible to a machine operator through a window to indicate whether the gas evacuation system is operative to remove gas from the mold cavity.

REFERENCES:
patent: 4538666 (1985-09-01), Takeshima et al.
patent: 4722385 (1988-02-01), Yamauchi et al.

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