Process for regulating hardening speed of self-hardening mold

Details Process for regulating hardening speed of self-hardening mold Process for regulating hardening speed of self-hardening mold

1974-08-26

1976-06-01

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296BE, 260 334R, 260 4251, C08L 2900

Patent

active

039607984

ABSTRACT:
A process for regulating the hardening speed of a self-hardening mold which comprises adding an alcohol as a hardening speed regulating agent when a mold is formed with molding sand prepared by adding a polyvinyl alcohol solution and a boron compound to refractory particles and then kneading the mixture. As the hardening speed regulating agent, polyhydric alcohol such as ethylene glycol, mannitol, sorbitol, glycerol, etc., and monohydric alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, etc., may be used.

REFERENCES:
patent: 3219613 (1965-11-01), Keene
patent: 3324065 (1967-06-01), Pierce
patent: 3591543 (1971-07-01), Stafford
patent: 3632786 (1972-01-01), Nickerson
patent: 3886112 (1975-05-01), Watson et al.

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