| 摘要 |
PURPOSE:To prevent a break out accident caused by over-solidification of a casting billet by arranging a starting plate at a discharging hole of a casting nozzle, and reducing a pressure in the casting nozzle to pour as a steady flow for a molten metal casting to a drum surface at starting of pouring. CONSTITUTION:The molten metal 4 in a tundish 1 is poured into the casting nozzle 2 by opening of a stopper 3 and is poured to the drum 6 surface through a filter 5. The starting plate 7 is provided to be covered on an aperture part of the filter 5 and to be melted down by bringing into contact with the molten metal for about 1min. Therefore, the molten metal is filled up in the casting nozzle 2 till melting down of the starting plate 7 and a uniform pouring from the filter 5 is obtained. Further, as an atmospheric pressure in the casting nozzle 2 is reduced from a suction hole 8 and is kept on the reducing pressure till filling up of the molten metal 4 therein 2, the uniform pouring is obtained. |
