CORE FOR PRECISION CASTING, PRODUCTION METHOD THEREFOR, AND MOLD FOR PRECISION CASTING

摘要

A core for precision casting, comprising a coating layer (19a) formed on the surface of a core main body (18a) for precision casting that is sintered using silica particles as the main component thereof, said coating layer being silicon alkoxide or a mixed alkoxide comprising silicon alkoxide and aluminum alkoxide. As a result holes (18c) formed on the surface are sealed. As a result, core breakage during casting can be prevented.