Cast shaping method and cast material

Abstract

A molding method of molding a mold for producing iron castings includes generating mixed sand using engineered sand as an aggregate and a binder, filling the mold with the mixed sand, and solidifying the mixed sand filled in the mold.

1 . A molding method of molding a mold for producing iron castings, the molding method comprising:
 generating mixed sand using engineered sand as an aggregate and a binder;   filling the mold with the mixed sand; and   solidifying the mixed sand filled in the mold.   
     
     
         2 . The molding method according to  claim 1 , wherein the engineered sand comprises 60% or more of aluminum oxide (Al 2 O 3 ) and 40% or less of silicon dioxide (SiO 2 ), and the binder is either sodium silicate or potassium silicate. 
     
     
         3 . The molding method according to  claim 1 , wherein the binder has a molar ratio of 1.8 or more. 
     
     
         4 . The molding method according to  claim 1 , wherein the binder is 4 parts by weight or less relative to 100 parts by weight of the aggregate. 
     
     
         5 . The molding method according to  claim 1 , wherein the engineered sand is produced by a melting method or a sintering method. 
     
     
         6 . The molding method according to  claim 1 , wherein in the solidifying, the mixed sand is solidified by a dehydration condensation reaction. 
     
     
         7 . The molding method according to  claim 1 , wherein in the solidifying, the mixed sand is solidified using carbon dioxide (CO 2 ) gas. 
     
     
         8 . The molding method according to  claim 1 , wherein the mixed sand is foamed mixed sand containing at least a surfactant. 
     
     
         9 . A mold material for molding a mold for producing iron castings, the mold material comprising engineered sand as an aggregate, the engineered sand comprising 60% or more of aluminum oxide (Al 2 O 3 ) and 40% or less of silicon dioxide (SiO 2 ), and either sodium silicate or potassium silicate as a binder.