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US 8,109,319 B2Granted
Molding process and the resulting mold
AssigneeSintokogio, Ltd.
InventorsNorihiro Asano, Toshihiko Zenpo, Masaya Hotta, Kazuyuki Nishikawa
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Abstract
A molding process which comprises mixing together a particulate aggregate, plural kinds of water-soluble binders, a crosslinking agent causing crosslinking reaction with the binders, a phenol resin, and water, agitating the obtained mixture to prepare a bubbled fluid aggregate mixture, filling the aggregate mixture into a molding cavity, and solidifying the aggregate mixture through the evaporation of water from the mixture to give a mold made from the mixture.
Claims14
A process for molding a mold comprising steps of:
- a. mixing, stirring, and bubbling granular aggregates, plural kinds of water-soluble binders as bonds, a cross-linker that causes a bridging reaction with the water-soluble binders wherein said cross-linker is a compound having a carboxyl group, and phenolic resin in an amount from 0.05 to 0.50 wt % per 100 wt % of said granular aggregates, to produce a fluid aggregate mixture;
- b. filling a molding space with said fluid aggregate mixture;
- and
- c. vaporizing moisture in said filled fluid aggregate mixture such that the aggregate mixture is cured to produce a mold from the cured aggregate mixture.
1 more element
Dependencies are inferred from the claim text.