| 摘要 |
PURPOSE: A core manufacturing method is provided which not only uses an existing core material as it is, but also prevents infiltration of molten metal into the core due to high pressure environment, and a casting method of an engine piston containing oil gallery is provided which comprises the core manufacturing method. CONSTITUTION: The manufacturing method of a high-pressure casting core comprises the process of forming a metallic thin film layer(3) on the surface of the core(2) by taking out and cooling the molten metal coated core right after dipping the core into molten metal, wherein the molten metal is the same material as a metal material such as aluminum to be high pressure cast in a core installed mold, wherein the core is a salt core(2). The casting method of an engine piston containing oil gallery comprises the manufacturing method of the high-pressure casting core.
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