Precision vacuum melting and casting furnace with a melting cham

Details Precision vacuum melting and casting furnace with a melting cham Precision vacuum melting and casting furnace with a melting cham

1985-04-25

1986-05-27

Crosby, Gene P.

Metal founding

Means to apply vacuum directly to work or to hold or...

Means applying vacuum or suction directly to molten casting...

164335, 251228, 137330, B22D 2715, B22D 3700

Patent

active

045909830

ABSTRACT:
A precision vacuum melting and casting furnace with a melting chamber containing a melting device. A casting chamber is positioned below the melting chamber. The casting chamber can be raised, lowered, and swung out to the side. The casting chamber communicates with the melting chamber through a valve chamber, which contains a vacuum valve. The valve chamber accommodates a lift platform for raising the mold up under the melting device. The casting chamber has a lifting mechanism, and the vacuum valve has an activating rod. In order to essentially simplify precise alignment of the different movable parts and to convert an existing conventional casting furnace into a furnace in accordance with the present invention, a hollow vertical shaft is attached to the valve chamber. The rod that activates the vacuum valve extends vacuum-tight through the shaft. A sleeve that guides the casting chamber is positioned at the outer surface of the shaft.

REFERENCES:
patent: 3519061 (1970-07-01), Dunlop
patent: 3845808 (1974-11-01), Higginbotham et al.
patent: 3897815 (1975-08-01), Smashey
patent: 3916992 (1975-11-01), Boyadjieff et al.
patent: 4328947 (1982-05-01), Reimpell et al.
patent: 4541475 (1985-09-01), Goddard et al.

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