Resin constituent for shell mold and resin coated sand null for shell mold mold

摘要

PROBLEM TO BE SOLVED: To provide a resin composition for shell mold improving a mold collapsibility after pouring molten metal, in a casting of a light alloy casting, such as aluminum casting using the shell mold. ;SOLUTION: This resin composition for shell mold contains 1-30wt. parts of at least one kind selected among amino acid or amino alkali metal salt, alkali earth metal salt, hydrochloride and sulfate, further, alkyl-ester and its hydrochloride as a collapsing agent to 100 wt. parts phenol-formaldehyde base resin used to manufacture the easily collapsing mold for aluminum and light alloy casting.;COPYRIGHT: (C)1998,JPO