Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1985-05-28
1986-05-20
Godici, Nicholas P.
Metal founding
Process
Shaping liquid metal against a forming surface
164133, 164306, 164337, 222600, B22D 1804, B22D 3700
Patent
active
045894663
ABSTRACT:
Apparatus and methods for differential pressure, counter gravity, casting of metal in a gas-permeable mold having a vertical passage with a lower open end for introducing molten metal into its mold cavity means. A crucible is provided for holding molten metal with its surface positioned beneath the mold. The crucible and the mold are relatively movable toward and away from one another for introducing molten metal into the lower open end of the mold, and pressure means is provided for applying a differential pressure to the mold and crucible to cause molten metal to fill the mold cavity means through the vertical passage. A rigid, permanently crimpable fill pipe is sealingly connected to the lower open end of the vertical mold passage with its lower end extending vertically downwardly toward the crucible. Fill pipe crimping means is positioned between the mold and crucible for selectively permanently crimping the fill pipe to close it, after filling of the mold cavity means, to prevent reverse flow of molten metal from the mold to the crucible as the mold and fill pipe are moved relatively away from the crucible.
REFERENCES:
patent: 3774668 (1973-11-01), Heimgartner
patent: 3863706 (1975-02-01), Chandley et al.
patent: 3900064 (1975-08-01), Chandley et al.
patent: 3976277 (1976-08-01), Basel et al.
patent: 4112997 (1978-09-01), Chandley
patent: 4142651 (1979-03-01), Leopoldi et al.
"Drip Free Dispensing of Viscous Liquids", J. W. Grubb, Western Electric Technical Digest, No. 62, Apr. 1981, pp. 3-4.
Chandley George D.
Thomas Eugene W.
Godici Nicholas P.
Hitchiner Manufacturing Co., Inc.
Kent Edgar H.
Seidel Richard K.
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