| 摘要 |
PURPOSE:To enable precise casting in the vicinity of the combustion chamber of the cylinder head, and to prevent generation of cavities at the corner parts or sack-shaped parts of the cylinder head. CONSTITUTION:When a cylinder head W having a plurality of combustion chambers W1... which are formed in parallel with the gasket surface W2 is cast, the molten metal is poured through a number of sprues W3... which are arranged so as to surround the outer circumference of the respective combustion chambers W1... in a square-shaped manner. This constitution enables a precise casting in the vicinity of the combustion chambers W1..., and the run of the molten metal at the parts away from the sprues W3... becomes excellent, preventing generation of cavities. |
