CASTING METHOD FOR CAST IRON-MADE PISTON

摘要

PURPOSE:To obtain a thin thickness and lightweight cast iron-made piston without developing burr on a outer circumferential face by inserting the sand core into the inner part of vessel-type metallic mold with bottom or cylindrical metallic mold having the opening part in the upper part and arranging a runner passing through near to the bottom part in the core. CONSTITUTION:Concerning the production of cast iron-made piston, the sand core 4 is inserted into the inner part of integrated vessel-type metallic mold 2 with the bottom or integrated cylindrical metallic mold 2 having the opening part 1 at the upper part. At the time, in the core 4, the runner 5 passing through near to the bottom part of mold is arranged and the molten metal is poured into the mold space 6. In this way, the thin thickness and lightweight cast iron-made piston without developing the burr on a outer circumferential face is produced.