| 摘要 |
PURPOSE:To obtain a nozzle for casting of good dimensional accuracy continuously with high performance by forming a molten metal hole and an axially clogged part simultaneously by the use of an extruding machine. CONSTITUTION:An outer die cylinder 5, a die mandrel 6 and a bottom plate 7 are set to a mouthpiece 4, and body 14 is packed in the die by the extrusion of an auger machine 3, that is, a screw 12, having two stage deaeration by Patent Application No. SHO 56-19908. In this state, the plate 7 and the mandrel 6 are removed, and a plate is placed on the table 8. After the molding is cut in a wire cutting position 9, the table 8 is moved downward to remove a nozzle 10 for casting formed with an outflow port 1 for molten metal closed at one end. Here, 13 in the figure denotes a screw shaft. After the formed nozzle 10 is dried and calcined by an ordinary system, outlet ports 2 for molten metal are drilled-in prescribed positions, whereby the product is obtained. |
