Sand mold composition for metal casting

Details Sand mold composition for metal casting Sand mold composition for metal casting

1976-04-06

1978-03-21

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 3835, 106193J, 106197C, 106209, 106214, B28B 734

Patent

active

040802132

ABSTRACT:
A sand mold composition for the metal casting comprising a molding sand and pullulan as a binder therefor. As compared with prior art, the present composition has following advantages: in the molding step, no gas, dust, noise, or vibration is generated; in the pouring and sand stripping steps, neither noxious gas nor offensive odor is emitted; although the mold has a sufficiently high strength at room temperature for the convenient handling, it is readily broken down after the casting and so renders the knock-out and sand stripping very easy; and the recovered sand can be reused as such, practically without any after-treatment. The molding cycle is comparable to that of conventional oil sand or carbon dioxide-bonded mold.

REFERENCES:
patent: 2977236 (1961-03-01), Neukom
patent: 3179523 (1965-04-01), Moren
Hijiya et al., Chem. Abs., vol. 82, 1975, 18915e, 58849t.

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