| 摘要 |
PROBLEM TO BE SOLVED: To solve such problems that in a low-pressure casting method for using a manufacturing process for car parts, etc., when molten metal is poured into a mold, in the mold, a part of the molten metal is separated as spray and since the spray is firstly cooled/solidified by sticking to a wall surface, after casting, since the spray can not be unified and be exfoliated, this trouble is considered as one problem and further, since in the molten metal, the air and much impurity components are interposed, the molten metal is needed to pour into the mold while preventing these segregation. SOLUTION: In a stoke 2 submerged into the molten metal 3 to pour this molten metal into the mold 8, a spiral state projective part 24 having one rotation or more is arranged in the height of the radial in the inner diameter or more at least a part of the inner face of the cylindrical main body part 21. Since the molten metal 3 is poured into the mold 8 while spirally rotating and stirring in the stoke 2 along this projective part 24, the generation of the spray does not happen and the molten metal 3 is uniformized and it is prevented that the cast product is exfoiled and segregated. COPYRIGHT: (C)2008,JPO&INPIT
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