| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for reduced pressure die casting having little erosion and low developing ratio of casting defect, even in the reduced pressure die casting machine having a charging type for molten light alloy for casting in a holding furnace from the lower part onto a horizontal type injection sleeve through a molten metal supplying tube by reducing the pressure in a cavity in the die. SOLUTION: In the reduced pressure die casting apparatus provided with the structure filling up molten metal into the cavity under reduced pressure state, with a plunger tip sliding in the injection sleeve after charging the molten light alloy for casting in the holding furnace into the horizontal type injection sleeve from the lower part by reducing pressure in the cavity in the die; the above sleeve is characterized in that the inner wall surface in contact with the molten metal is formed of a metal-based composite material. COPYRIGHT: (C)2007,JPO&INPIT
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