| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for producing a magnesium alloy cast billet excellent in surface quality can be obtained reasonably in the mechanism. SOLUTION: The apparatus produces the magnesium alloy cast billet by pouring molten magnesium alloy pumped up from a melting furnace into a metallic mold through a nozzle to be solidified. This apparatus is provided with; a nozzle having at least three of nozzle pieces connected so as to be rotatable between mutually adjacent nozzle pieces; an ascending/descending means for ascending/descending the tip end part of nozzle piece supported by facing to the metallic mold among these nozzle pieces; a detecting means for detecting molten surface in the metallic mold of the molten magnesium alloy poured into the metallic mold through these nozzle pieces; wherein the nozzle piece at the tip end part is risen under state of approaching this molten alloy pouring hole to this molten alloy surface by operating the ascending/descending means while matching to the rise of the molten alloy surface in the metallic mold detected with the detecting means. COPYRIGHT: (C)2007,JPO&INPIT
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