Process for making molds
AssigneeSintokogio, Ltd.
InventorsNorihiro Asano, Yusuke Kato
Life of this patent
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Abstract
The invention disclose a process for making molds which do not generate toxic gas in pouring a molten metal into the molds equipped with casting cores or the like even when the binder contained therein decomposes and which are excellent in the disintegration characteristics after casting. The process comprises mixing a particulate aggregate with one or more water-soluble binders, a surfactant, a crosslinking agent and water under stirring and foaming to prepare a foamed aggregate mixture, charging the foamed aggregate mixture into a mold-foaming cavity, solidifying the charged mixture by evaporating the water contained in the mixture to form a mold, and taking the mold out of the cavity.
Claims13
A molding process comprising steps of
- mixing, stirring, and foaming granular aggregate material, one or more kinds of water-soluble binders, a surfactant, a cross-linker, and water to prepare a foamed aggregate mixture;
- filling a molding space with said foamed aggregate mixture;
- vaporizing moisture in said filled aggregate mixture such that the aggregate mixture is cured to make a mold from the cured aggregate mixture;
- and
- removing said produced mold from said molding space.
The process of any one of the preceding claims, wherein said molding space is defined by a metal mold, and wherein said filling step includes a step for filling said foamed aggregate mixture in said molding space by pressurizing said foamed aggregate mixture.
Dependencies are inferred from the claim text.