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US 9,764,377 B2Granted
Method for the production of core sand and/or molding sand for casting purposes
AssigneeS & B Industrial Minerals GmbH
InventorsAndreas Wolff, Bettina Vennemann, Dieter Genske, Peter Oberschelp
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Abstract
The invention relates to a method for producing core sand and/or molding sand for casting purposes. A granular mineral mold base material is mixed with at least one inorganic binder and additionally an inorganic expanding additive. Water glass may be used as the binder and expandable graphite may be used as the expandable additive.
Claims13
A method of making a core sand and/or mold sand for foundry use, comprising mixing a granular, mineral mold base material with at least one inorganic binder and an inorganic expanding additive,
- wherein water glass is utilized as the binder and expandable graphite is utilized as the expanding additive, and
- wherein the expandable graphite is added to the mixture of mold base material and water lass in an amount of up to approximately 0.5% by weight, based on the mold base material.
A method of casting, comprising:
- mixing a granular, mineral mold base material with at least one inorganic binder and an inorganic expanding additive;
- forming a casting mold from the resulting mixture;
- and
- casting a metal alloy in the casting mold,
- wherein water glass is utilized as the binder and expandable graphite is utilized as the expanding additive;
- and
- wherein the expandable graphite is added to the mixture of mold base material and, water class in an amount of up to approximately 0.5% by weight, based on the mold base material.
4 more elements
Dependencies are inferred from the claim text.