| 摘要 |
PURPOSE:To eliminate such a dangerous selective molten metal flow that molten metal comes out of a metallic mold because of breakage of a part of solidified part in the molten metal and to attain perfect gas venting. CONSTITUTION:One or plural pieces of slender ejecting groove 4 for flow straightening formed in narrow groove width and having a long flowing path communicates a cavity 3 with a recessed part 5 and is arranged in parallel with the mating surfaces of the metallic molds. A tapered gas venting groove 6 having almost the same width as the breadth of the ejecting groove 4 for flow straightening is provided outside the recessed part 5 in parallel with the ejecting groove 4 for flow straightening while communicating the recessed part 5 with the air outside the metallic mold.
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