| 摘要 |
PURPOSE:To vent smoothly air and gas and to form an excellent casting having no blowholes by inclining the casting cavity of a casting mold relative with a horizontal plane and curving smoothly a runner to an inclined shape and branching the same to a plurality. CONSTITUTION:An inlet 28 is inclined at approximately the same angle as the angle of a casting cavity 27 to a deep funnel shape. An inclined runner 29 is divided to the right and left at a gentle angle at a branch point 30 in the midway to form branched runners 31 so that the runners are communicated with both sides at the bottom end of the cavity 27 by having the smooth curve. A riser hole 32 is provided at the top end of the cavity 27 and is opened atop the casting mold 25. A molten metal 33 is poured through the inlet 28 and is admitted through the runner 29 and the branch runners 31 to the cavity 27 so as to ascend in the cavity 27 until the molten metal arrives at the hole 32 where the molten metal is solidified to form a riser part 34 and a bend 35. The mold 25 and core 26 are collapsed and the casting is taken out. The runners and the riser 34 are removed from the casting and the product is thus obtd. |
