| 摘要 |
PROBLEM TO BE SOLVED: To provide a method, system and program for reusing a water-soluble core by which the concentration of mixing sand (slurry) to be fed to a core die of a molding machine can be adjusted simply and highly precisely in a short time without using any centrifugal separator. SOLUTION: In adjusting the blending ratio of cast sand and inorganic salt solution of a slurry containing inorganic salt, fine inorganic powder and cast sand which are settled and collected when a water-soluble core is washed with water or water solution of an inorganic salt binder, the target densityρof the slurry for obtaining the predetermined blending ratio is determined from the blending ratio of cast sand and inorganic salt solution and the density. The removing amount x of the inorganic salt solution to be removed from the slurry in order to set the densityρ<SB>0</SB>of the slurry to be the target densityρis obtained, and the inorganic salt solution of the removing amount x is removed from the slurry. COPYRIGHT: (C)2008,JPO&INPIT
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