APPARATUS TO PRODUCE GALVANIZING STEEL SHEETS

摘要

PURPOSE: A device for manufacturing a galvanized steel sheet is provided to prevent scratches on a steel sheet by controlling a moving plate so that the surface of the steel sheet does not contact the steel sheet exit side of a chamber. CONSTITUTION: A device for manufacturing a galvanized steel sheet comprises an air knife and a chamber(100) The air knife is installed on the upper side of a plating bath to wipe a plated layer formed on a steel sheet, having passed through the plating bath, with nitrogen gas. The chamber forms an inactive atmosphere of nitrogen gas that encloses the air knife and the steel sheet not to form an oxide film on the surface of the plated layer. An exit control unit(150) is installed at a steel sheet exit formed on the upper side of the chamber and blocks the steel sheet exit according to the width or shaking of the steel sheet in order to minimize the leakage of nitrogen.