Method of producing foamed sand and production apparatus for producing foamed sand
AssigneesToyota Jidosha Kabushiki Kaisha, Sintokogio, Ltd.
InventorsTakumi Maegawa, Masashi Morikawa, Kenichiro Mori, Yusuke Kato
Life of this patent
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Abstract
Provided is a method of producing foamed sand (s) for forming a sand mold. The foamed sand (s) includes sand particles (p) and foam (f) adhering to surfaces of the sand particles (p). The foam (f) contains water glass (b), water (w), and a surfactant (c). According to the method, an aqueous surfactant solution (e) in which the surfactant (c) is dissolved is frothed to generate froth (d) from the aqueous surfactant solution (e). Then, the generated froth (d), the water glass (b), and the water (w) are kneaded with the sand constituted by the sand particles (p).
Claims9
A method of producing foamed sand for forming a sand mold, the foamed sand including sand particles and foam adhering to surfaces of the sand particles, the foam containing water glass, water, and a surfactant, the method comprising:
- generating froth from an aqueous surfactant solution in which the surfactant is dissolved, by frothing the aqueous surfactant solution;
- and
- kneading the generated froth, the water glass, and the water together with the sand constituted by the sand particles.
A production apparatus for producing foamed sand for forming a sand mold, the foamed sand including sand particles and foam adhering to surfaces of the sand particles, the foam containing water glass, water, and a surfactant, the production apparatus comprising:
- a storage portion in which sand constituted by the sand particles is stored;
- a water glass supply portion configured to supply the water glass into the storage portion;
- a water supply portion configured to supply the water into the storage portion;
- a froth supply portion configured to supply, into the storage portion, froth generated by frothing an aqueous surfactant solution in which the surfactant is dissolved;
- and
- a kneader configured to knead, in the storage portion, the sand with the water glass, the water, and the froth supplied into the storage portion.
Dependencies are inferred from the claim text.