Patent ID: 8790560
Filing Date: 2014-07-29
Classification: B22C

Abstract:
1. A molding process comprising the steps of: mixing, stirring, and foaming granular, aggregate material, one or more kinds of water-soluble binders without a phenolic resin, a nonionic surfactant having a hydroxyl group, a cross-linker having a carboxyl group, and water to form a foamed aggregate mixture that includes the granular aggregate material coated with one or more kinds of the water-soluble binders; filling a molding space in a metal mold with said foamed aggregate mixture by pressurizing said foamed aggregate mixture; vaporizing moisture in said foamed aggregate mixture in said molding space of said metal mold by heating said metal mold such that the aggregate mixture is cured to produce a mold from the cured aggregate mixture; and removing said produced mold from said molding space.