| 摘要 |
Process and apparatus for producing a cast metallic product by forming a metal from a melt inside a forming space of a die under application of pressure to the melt according to a direct melt-forming method, in which while a melt into a forming space of a lower die unit, a piston valve closely slidable in a cylinder space is gradually descended to a given location in the forming space, said cylinder space being located under the casing space and opened to a bottom surface of the forming space at an area smaller than that of said bottom surface; the forming space is closed with an upper die unit after completion of feeding the melt in the forming space; and after the closing step, while vibration is being applied upon the melt inside the forming space, a forming pressure is exerted upon the melt by rising the piston valve.
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