MOLTEN METAL PLATED STEEL SHEET PRODUCTION METHOD AND APPARATUS

摘要

A molten metal plated steel sheet production method comprising the steps of dipping a steel sheet in a molten metal plating bath continuously to cause a molten metal to adhere to the steel sheet, changing the orientation of the steel sheet in the molten metal plating bath by means of an orientation changing device to pull it out of the molten metal plating bath, adjusting the amount of molten metal adhering to the steel sheet by means of a gas wiping device, correcting the warp of the steel sheet in a contactless manner by a magnetic force acting perpendicularly to the steel sheet and produced by an electromagnet disposed upstream and/or downstream from the gas wiping device, wherein the value of the current flowing through the electromagnet is set at a predetermined value according to information on the steel sheet. The warp of the steel sheet over the full length is prevented, the amount of plating coating is uniform, and the surface properties are excellent