ONE-SIDE AND BOTH-SIDE METAL HOT DIPPING DEVICE FOR STRIP

PURPOSE:To provide the titled device which changes over easily and quickly one-side plating and both-side plating by the constitution in which one of gas throttling nozzles disposed to face each other with a strip after metal hot dipping in-between is vertically moved and the level of a plating bath surface is adjusted. CONSTITUTION:The strip S is introduced from a continuous furnace (not shown) side through a snout 5 into a sealing box 14 of which the lower part is dipped into the plating bath 6 and in which a non-oxidizing atmosphere is maintained. After the strip is passed through the inside of the plating bath 6, the strip is conveyed in a perpendicular direction by a driving roll 15 and is subjected to the gas throttling on both sides by a pair of gas throttling nozzles 15a, 15b disposed to face each other with the strip in-between; thereafter, the strip S subjected to both-side plating is conducted to the outside. The surface W of the plating bath 6 is lowered to the lower level of the upper roll 15 and the plating liquid is gushed to one side of the strip S from a jet nozzle 17 and the one nozzle 16b is lowered down to the level of the roll 15, by which the one-side plating is executed.