PURPOSE: To ensure height of swelling of molten metal jet by providing an air vent on the nozzle plate connected to a jet nozzle discharge port under a steel plate that runs horizontally.
CONSTITUTION: The discharge port 41 of a jet nozzle 4 is inclined to the direction of advance of a steel plate 2 so that molten metal is jetted obliquely upward and the jet A becomes a parabola. The nozzle 4 is provided with a nozzle plate 5 to ensure the length of wetting of the steel plate by the molten metal along the lower face of the steel plate 2 of the jet A side to connect to the discharge port 41. The plate 5 is parallel 51 to the lower face from the discharge port 41 side to an extent of specified length, and exit side of the steel plate therefrom is inclined downward. An air vent 6 that ommunicates with a space B formed between the jet A and the parallel part 51 is provided in the parallel part 51. By this way, evacuation of the space B and consequent generation of Coanda effect is prevented and the height of swelling of the jet A can be ensured.
OONAKA SHIYOUJI
SEO ICHIJI
HAKAMAGI HIROYUKI
