US 12,084,774 B2
Gas wiping nozzle and method for manufacturing hot-dip metal coated metal strip
Kenji Yamashiro, Tokyo (JP); Hideyuki Takahashi, Tokyo (JP); Takumi Koyama, Tokyo (JP); Hidetoshi Inoue, Tokyo (JP); Syuhei Nishinaka, Tokyo (JP); Toshiki Fujii, Tokyo (JP); Reona Aishima, Tokyo (JP); Yutaka Yanagisawa, Tokyo (JP); and Masahiro Yoshikawa, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/008,487
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Apr. 21, 2021, PCT No. PCT/JP2021/016193
§ 371(c)(1), (2) Date Dec. 6, 2022,
PCT Pub. No. WO2021/256079, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-105965 (JP), filed on Jun. 19, 2020.
Prior Publication US 2023/0212728 A1, Jul. 6, 2023
Int. Cl. C23C 2/00 (2006.01); C23C 2/20 (2006.01); C23C 2/40 (2006.01)
CPC C23C 2/20 (2013.01) [C23C 2/40 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A gas wiping nozzle configured to blow a wiping gas onto a metal strip pulled up from a molten metal bath and adjust an amount of a molten metal coated to a surface of the metal strip, the gas wiping nozzle comprising:
a first nozzle member; and
a second nozzle member, wherein
the gas wiping nozzle has a slit as a gas blowing port between the first nozzle member and the second nozzle member, at a metal strip-side end of the gas wiping nozzle,
each of the first nozzle member and the second nozzle member is divided along a length direction of the slit into a plurality of nozzle members,
a dimension of a divided face of the first nozzle member is 1.5T1 or more in a section of the first nozzle member that is cut in the length direction of the slit, at at least one point on a depth direction orthogonal to the length direction of the slit where T1 is a thickness of the first nozzle member in a width direction of the slit, and a dimension of a divided face of the second nozzle member is 1.5T2 or more in a section of the second nozzle member that is cut in the length direction of the slit, at at least one point on the depth direction orthogonal to the length direction of the slit where T2 is a thickness of the second nozzle member in the width direction of the slit.