Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1979-11-15
1982-08-24
Hampilos, Gus T.
Metal founding
Process
Shaping liquid metal against a forming surface
164348, 164122, 164900, 164121, B22D 1700
Patent
active
043456375
ABSTRACT:
Die castings are made from metal compositions that are fully liquid or as a preferred embodiment contain between about 10 and 85 weight percent degenerate dendrites. The composition is injected into the cavity of a die at a mean die temperature which is as near to ambient temperature as possible and usually less than about 400.degree. F. The die is formed of a material having a thermal diffusivity of at least about 0.5 cm.sup.2 /sec. The castings are ejected and the die surface is sprayed with a liquid to bring the die surface temperature back to the mean die temperature or below in the shortest possible time. The time between injection and ejection is less than about 1 minute and the time between ejection and spraying is less than about 30 seconds.
REFERENCES:
patent: 2923041 (1960-02-01), Ryznar
Rheocasting Processes; Flemings et al.; AFS International Cast Metals Journal; Sep. 1976, pp. 11-22.
Automation Comes to Die Casting; Radke and Smith, Tool and Manufacturing Engineer; vol. 53, No. 3, Sep. 1964.
Flemings Merton C.
Riek Rodney G.
Young Kenneth P.
Cook Paul J.
Hampilos Gus T.
Lin K. Y.
Massachusetts Institute of Technology
Smith, Jr. Arthur A.
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