Metal founding – Process – Shaping a forming surface
Patent
1992-11-16
1993-06-01
Batten, Jr., J. Reed
Metal founding
Process
Shaping a forming surface
106 3822, 106 3828, 106 389, 164 33, 427134, B22C 100, B22C 300, B22C 900
Patent
active
052151433
ABSTRACT:
A new and improved, non-porous carbon foundry sand and a method of treating a fluid coke, having a spherical or ovoid particle shape and a size suitable for a coating surface, or a core or mold surface in the foundry industry, wherein the carbon sand is processed by heating the carbon particles at a controlled rate to a temperature in the range of about 1900.degree. F. to about 2300.degree. F. during a period of time preferably of more than about 30 minutes, and preferably for a period of about 1 to 2 hours, particularly to about 2000.degree. F. to about 2200.degree. F., and a method of casting molten metal against the heat treated carbon particles wherein the non-porous carbon foundry sand is combined with a suitable binder with which mixture a mold is formed to cast metal parts. The non-porous carbon sand also is useful in forming molds, cores, shell molds and shell cores and otherwise in using the carbon sand to replace other molding an core-making sands used in the foundry industry.
REFERENCES:
patent: 2830342 (1958-04-01), Meyers et al.
patent: 2830913 (1958-04-01), Meyers et al.
patent: 3802902 (1974-04-01), Turner, Jr. et al.
patent: 5094289 (1992-03-01), Gentry
American Colloid Company
Batten, Jr. J. Reed
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