PURPOSE: To efficiently manufacture a casting product having a little impurity and excellent quality by using a molten metal carrying device, which can easily supply the fixed quantity without mixing impurities of slag, etc., floated up on the molten metal in a holding furnace.
CONSTITUTION: In this molten metal carrying device, a ceramic-made cylinder 7 providing a cylinder suction hole 5 for sucking the molten metal 3 in the molten metal holding furnace 2 and a cylinder discharging hole 6 for discharging the sucked molten metal 3, is arranged and a ceramic-made piston 8 inserted as freely sliding into this is arranged, and a ceramic-made molten metal carrying tube 9 connected as communicating with the cylinder discharging hole 6 and passed through higher position than the molten metal surface level in the molten metal holding furnace 2 is arranged. Further, at this other end, a molten metal supplying hole 10 is formed and also, a float D for detecting molten metal 3 surface level in the molten metal holding furnace 2 is arranged, and a hydraulic lifting device P for lifting the holding furnace 2 to hold the depth from the molten metal surface level of the cylinder suction hole 5 to the constant based on the above detected result, are arranged.
TSUBOTA HIROTAKA
TSUCHIDA JIRO
