Method of producing foamed sand and production apparatus for producing foamed sand
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United States of America Patent
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Aug 4, 2020
Grant Date -
Nov 15, 2018
app pub date -
Oct 25, 2016
filing date -
Nov 6, 2015
priority date (Note) -
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status (Latency Note)
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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).
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