| 摘要 |
PURPOSE: A molten metal injection apparatus for preventing mixing of oxide is provided to prevent oxide from introducing in molten metal injection cup and minimize entrapment of air according to flow of molten metal by installing an open/shut type barrier membrane operated by control unit in front of the molten metal injection cup. CONSTITUTION: In a molten metal injection apparatus vertically operated and equipped with injection cup(20) for receiving molten metal, the molten metal injection apparatus for preventing mixing of oxide is characterized in that the injection cup(20) comprises a molten metal inflow hole(21) formed on the front side of the injection cup(20), and a movable open/shut type barrier membrane(30) for selectively opening the molten metal inflow hole(21), wherein the entrance of an upper part of the injection cup(20) is positioned at a higher elevation than the elevation level of the molten metal, wherein an opening and closing unit for opening and closing the open/shut type barrier membrane(30) comprises first sensor part(40a) and second sensor part(40b) for sensing position of the injection cup(20) inside the molten metal; a control part(50) for outputting control signals by signals of the first sensor part(40a) and second sensor part(40b); and a driving motor part(60) for lifting and lowering the open/shut type barrier membrane(30) as the driving motor part(60) is being driven by control signals of the control part(50), wherein a lowerable and liftable means of the open/shut type barrier membrane(30) through the driving motor part(60) is a wire type.
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