Method of manufacturing foundry sand molds

Details Method of manufacturing foundry sand molds Method of manufacturing foundry sand molds

1979-12-20

1982-05-18

Lieberman, Allan

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

106 385R, 26099818, 524600, 524603, B28B 734, C08L 126, C08L 3302, C08K 336

Patent

active

043304591

ABSTRACT:
Mixing (a) a carboxylic acid, (b) a divalent or trivalent metal oxide or hydroxide and (c) a foundry molding sand in the presence of an aqueous solution of (d) a carboxyl-group-containing polymer or (e) water followed by shaping and curing can provide sand molds having sufficiently high green strength without contamination of the working environment. The molding sand composition has excellent processability, which means filling of shapes or molds with the sand can be done with ease. The sand molds manufactured in this way can be disintegrated by a simple procedure. Therefore the molding sand can be used over and over again and does not cause environmental pollution due to disposal of the molding sand.

REFERENCES:
patent: 2765507 (1956-10-01), Wolf et al.
patent: 3330674 (1967-07-01), Santmyer
patent: 3640826 (1972-02-01), Lang et al.
patent: 3947392 (1976-03-01), Lang et al.
patent: 4106944 (1978-08-01), Epstein
patent: 4183759 (1980-01-01), Epstein
patent: 4203771 (1980-05-01), Matsui et al.

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