| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of producing an aluminum casting achieving both high strength and high rigidity even if the aluminum casting is a large-sized and thin component.SOLUTION: A sand mold core 17 is interposed between a fixed mold 13 and a movable mold 15. A sand core is gently cooled without rapidly cooling a molten metal and an action to maintain superior flowability is exerted. A structure being thin and lightweight and enhancing component rigidity can be obtained by utilizing a hollow structure using the sand core. A technique capable of producing an aluminum casting having a closed cross section structure is provided even if the aluminum casting is a large-sized and thin component. |
