METHOD AND APPARATUS FOR CONTINUOUSLY PLATING METAL STRIP

摘要

PURPOSE:To obtain products of superior quality with high productivity by hot dipping a punched metal strip while moving the strip continuously and horizontally; removing excess moten metal; and spraying compressed heated air to regulate the resulting hot dipped layers to a uniform thickness. CONSTITUTION:Punched metal strip 1 is introduced into slit 8 of jet spraying unit 4 set in the center of molten metal vessel 2 through slit 6 of vessel 2 and wringer rollers 12, 13. Strip 1 contacts to jet currents of molten metal 3 raised in the direction of the arrows with a propeller pump (not shown) to be hot dipped. Strip 1 is then passed through slit 9 and wringer rollers 12, 13 to remove excess molten metal and sprayed with compressed air from first gas sprayer 14 to remove molten metal remaining on notch parts and small holes. The hot dipped layers are regulated to a uniform thickness with compressed heated air sprayed from a pair of second gas sprayers 15, 15', and strip 1 is taken out through slit 7.