| 摘要 |
PROBLEM TO BE SOLVED: To provide a core manufacturing method in which air-pocket is hot caused in the molding sand to the most when the core is manufactured. SOLUTION: When the molding sand S filled in a molding sand tank 2 from just above position confront the metallic mold 1 for manufacturing the core is charged into a metal mold 1, firstly, the molding sand S in the molding sand tank 2 is charged into the mold 1 by the dead weight to fill the molding sand S into the mold 1. Thereafter, the high pressure air is charged into the molding sand tank 2, and the molding sand S left in the tank 2 is forcibly blown into the mold 1 to fring the molding sand S into close contact with the mold 1, and the mold 1 under this state is heated to manufacture the core.
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