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US 10,967,421 B2Granted
Method of reusing core sand
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsDaisuke Yamashita, Hirotsune Watanabe, Masashi Morikawa
Life of this patent
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Abstract
A method of reusing core sand includes crushing a core used for casting into granules, the core includes water glass as a binder, and the water glass includes water-soluble water glass and water-insoluble water glass; heating the core; detaching the water glass from the core sand; and separating and collecting the core sand from a mixture of the water glass and the core sand.
Claims5
A method of reusing core sand comprising:
- crushing a core used for casting, the core including water glass as a binder, the water glass including water-soluble water glass and water-insoluble water glass, an amount of the water-soluble water glass adhering to the core sand being adjusted to be smaller than an amount of the water-insoluble water glass adhering to the core sand when the core is crushed;
- heating the core, the core being crushed;
- after heating the core, detaching the water glass from the core sand;
- and
- separating and collecting the core sand from a mixture of the water glass and the core sand, the water glass being detached from the core sand.
2 more elements
A method of reusing core sand comprising:
- crushing a core used for casting, the core including water glass as a binder, the water glass including water-soluble water glass and water-insoluble water glass;
- heating the core such that a ratio of a mass of the water-soluble water glass to a mass of the core sand and the water glass after heating the core is adjusted to be 0.2% or lower, the core being crushing;
- after heating the core, detaching the water glass from the core sand;
- and
- separating and collecting the core sand from a mixture of the water glass and the core sand, the water glass being detached from the core sand.
2 more elements
Dependencies are inferred from the claim text.