Device and method for manufacturing a coated metal strip with improved appearance by adjusting a coating thickness using gas jet wiping
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United States of America Patent
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Jan 9, 2024
Grant Date -
Dec 15, 2022
app pub date -
Nov 25, 2020
filing date -
Nov 29, 2019
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Abstract
A gas wiping device for controlling a thickness of a coating layer deposited on a running metal strip plated with molten metal in an industrial hot-dip installation includes: a main nozzle unit and a secondary nozzle unit, for blowing a wiping jet on a surface of the running strip, the main nozzle unit and secondary nozzle unit respectively including a main and secondary chamber fed by pressurized non-oxidizing gas and at least a main and secondary elongated nozzle slot formed in a tip of the respective main and secondary nozzle units, the tips each including an external top side, facing a downstream side of the running strip, and making an angle with the surface of the running strip. The secondary nozzle unit is adjacent the main nozzle unit over an external top side of the main nozzle unit tip.
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