Metal founding – Process – Shaping a forming surface
Patent
1990-09-19
1992-03-10
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
050942891
ABSTRACT:
A new and improved carbon sand and a method of treating a petroleum fluid coke, having a spherical or ovoid particle shape and a size suitable for a core or mold surface in the foundry industry, by heating or roasting the carbon particles at a temperature in the range of about 1000.degree. F. to about 1500.degree. F., particularly about 1200.degree. F. to about 1400.degree. F., for a time sufficient to volatilize from the carbon particles substantially all of the organic contaminants volatilizable at the roasting temperature, and a method of casting molten metal against the heat treated carbon particles, combined with a suitable binder, to form cast metal parts. The carbon sand also is useful in forming shell molds and shell cores and otherwise using the carbon sand to replace other molding and coremaking sands used in any of the various molding and coremaking processes with any of the various binder systems practiced by 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.
American Colloid Company
Batten, Jr. J. Reed
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