Salt cores for piston of the engine oil gallery formed

摘要

The present invention is characterized in that it comprises a pair of support pieces protruding inward from the inner circumferential surface of the core body, wherein the support piece has a fixing groove recessed upward from the bottom surface, Wherein the fixing groove is formed so as to be inclined as its inner circumferential surface moves inward and an entrance end forming an inclined surface outwardly is formed at the entrance side of the fixing groove, And a solid core for forming an oil gallery of an engine piston which can maintain a fixed state more firmly.