| 摘要 |
PURPOSE:To perform the pouring of a molten metal adequately and uniformly by forming the opening of the lower end part of a pouring nozzle by the slit like bottom part opening parting by passing through the center of the bottom plate by leaving one part of the bottom plate and the slit like side part opening rising from the both ends of the bottom part slit. CONSTITUTION:In case of pouring a molten metal to a pouring basin 2 in the direction just under a nozzle and the direction for both sides from the lower part opening of a pouring nozzle 4, resistance is given to the molten metal to which a bottom plate 12 falls and one opening is formed by communicating the opening 11a of an opening part 10 side to the slit of the bottom part, so the molten metal becomes a lenient discharging flow as a whole. Even in the state of dipping the lower end part of the pouring nozzle 4 into the molten metal of the pouring basin 2 inside the discharging thereof becomes a lenient one and no large fluctuation is caused on the molten metal level. The large diameter hole 13a provided at the upper part of the opening 11a prevents the nozzle clogging. Consequently the local reduction in the molten metal level temp. and the molten metal level fluctuations are prevented by the lenient discharging flow and the generation of the surface defects of the surface fold, the scum inclusion on the molten metal level, etc. is prevented. |
