| 摘要 |
PURPOSE:To manufacture easily hollow parts having intricate shapes to a casting by combining and integrally molding soluble cores for forming the hollow parts having the intricate shapes into a core body consisting of sand, disposing the core body into a casting mold and pouring a molten metal into the mold then dissolving the soluble cores and discharging the same together with the sand. CONSTITUTION:The core body 10 molded in a metallic mold is provided with positioning shafts 12 at both ends, is juxtaposed with cylinder bores 15 penetrating in the vertical direction and is provided with holes 13 for introduction of cooling water to the side walls. Shallow grooves 16 communicating the cores are provided between the adjacent bores. Both ends of the grooves 16 are communicated with notches 14 on the side walls of the body 10. The grooves 16 are shallower than the bores 15. The grooves 16 constitute cooling passages. The preliminarily molded soluble cores 26 are integrally combined into the grooves 16 simultaneously with the molding of the core body 10 consisting of the sand. The body 10 integral with the soluble cores is set into the casting mold and after the molten metal is poured therein, the sand is removed and the cores 26 are dissolved away by water, etc., then the hollow parts having the intricate shapes by the cores 26 are formed in the casting.
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