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US 10,183,322 B2Granted
Method of reusing core sand
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsDaisuke Yamashita, Hirotsune Watanabe, Masashi Morikawa
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Abstract
A method of reusing core sand includes: crushing a core used for casting into granules; heating the granules at a temperature of 300° C. to 550° C.; causing the heated granules to collide against each other such that water glass used as a binder detaches from the core sand; and blowing air into a mixture of the water glass and the core sand, which are detached from each other, such that the core sand is separated and collected from the mixture due to a difference in specific gravity between the water glass and the core sand.
Claims6
A method of reusing core sand comprising:
- crushing a core used for casting into granules;
- heating the granules at a temperature of 300° C. to 550° C.;
- after heating the granules, cooling the granules to 100° C. or lower;
- after cooling the granules, causing the granules to collide against each other such that water glass used as a binder detaches from the core sand;
- and
- blowing air into a mixture of the water glass and the core sand such that the core sand is separated and collected from the mixture due to a difference in specific gravity between the water glass and the core sand, the water glass and the core sand being detached from each other.
3 more elements
Dependencies are inferred from the claim text.