34f08f34_rials_patent_application_class__Description
20090205801 08-20-2009 [Description] 
METHOD OF MANUFACTURING EXPENDABLE SALT CORE FOR CASTING AND EXPENDABLE SALT CORE FOR CASTING - A die casting method for forming an expandable salt core includes, first, a salt mixture containing at least a potassium salt and a sodium salt is melted by heating to obtain a melt. Subsequently, the temperature of the melt is decreased to set the melt in a semi-solidified (solid-liquid coexisting) state. The melt in the semi-solidified state is injected into a metal mold under a high pressure and solidified. After solidification, the obtained expendable salt core is taken out of the metal mold.
Utilizing particular mold materials patent application class