TH53767A - Method for producing metal strips that are hot-dip coated - Google Patents

Abstract

DC60 A method for producing metal strips that is hot dip coated consists of: Stage of Coating of molten metal on the surface of the metal strip By continuously dipping the metal strips in the solution For coating Raise the metal bar at a constant speed. While supporting the metal bar with a pair of rollers Upper support and lower support rollers To clamp the surface of the metal strip in the coating latex, adjust the coating weight of the molten metal deposited on the metal strip surface by wiping the molten metal with gas. From the tip of the rat nipple for wiping gas That is held over the surface of the coating solution and makes the metal strip forward while supporting the metal strip With a pair of touch rollers Top and bottom contact roller To pinch the surface of the metal strip Where the metal strip is pushed forward by setting an L distance between the upper support rollers arranged in the coating fluid. With contact roller The bottom was arranged outside the coating solution. Within the range determined by the formula L is less than or equal to 80 X T X W2 / V, where L is the distance between the top support roller in the coating fluid and the bottom contact roller. Externally, coating fluid (mm), V: is the line velocity of the metal strip (m / s), T: is the tension applied to the metal strip. (kgf / mm2) and W: is the target coating weight per side of the metal strip. (g / sq m) according to this invention Consistent quality Of metal strips can be acquired By reducing the variation in the coasting weight of the molten metal. That is deposited on the surface of the metal bar By reducing the variation of Coating weight of molten metal The metal band is constantly deposited on the surface, regardless of the changing operating conditions. In which the hot dip galvanizing operation Successive being made Moreover Coating costs can be drastically reduced. By preventing falling Excessive deposition of molten metal The manufacturing method of metal strips that is hot-dip coated consists of a step of reclamation of Molten metal coating on the surface of the metal strip By continuously dipping the metal strips in the solution For the coating, raise the metal strip at a constant speed. While supporting the metal bar with a pair of rollers Upper supports and lower support rollers to clamp the surface of the metal bar in the glaze bath. Adjust the coating weight of the molten metal deposited on the surface of the metal strip by wiping the molten metal with gas from the tip of the wiping gas held over the surface of the glaze bath and making the metal strip forward while Support the metal bar with a pair of contact rollers. Top and bottom contact roller to pinch the surface of the metal strip Where the metal bars are made forward By setting the distance L between the upper support rollers provided in the coating bath. And contact roller The bottom is arranged outside the basin for the glaze. Within the range defined by the formula L (less than or equal to) 80 X T X W2 / V where L: is the distance between the upper support rollers in the solution. For coatings and the bottom contact roller outside for coating (mm), V: is the line velocity of the metal strip (m / s), T: is the tension applied on the metal strip (kgf / mm2) and W. : Is the target coating weight per side of the metal strip (g / m2) according to this fabrication. Consistent quality Of metal strips can be acquired By reducing the variation in the coasting weingth of the molten metal deposited on the surface of the metal strip. By reducing the variation of The coating weight of the molten metal that accumulates on the surface of the metal strip over time, regardless of the change in operating conditions. In which the hot dip galvanizing operation Successive being made Moreover Coating costs can be drastically reduced. By preventing falling Excess deposition of molten metal:

Claims (6)

1. The manufacturing method of metal strips that is hot-dip coated consists of the steps of Dipping the metal strip in a hot dip coating bath to deposition the molten metal. Continuously on the surface of the metal strip Conveying a metal band at a constant speed while supporting that metal bar with a pair of Upper support roller and lower support roller In the glaze Adjusting the coating weight of the molten metal deposited on the surface of the bar. Metal by wiping the molten metal with gas from the tip of the rat nipple for wiping the gas That was held above the surface Of the coating bath and making the metal strip forward (advancing) while supporting the metal strip with a pair of top contact rollers and bottom contact rollers arranged outside the coating solution Where the metal bar is pushed forward by setting the L distance between the support rollers. The upper side is set up in the glaze basin and the lower contact roller arranged outside the tub for The enamel is within the range determined by the formula: L (less than or equal to) 80 x T x W2 / V where L: is the distance between the upper support roller in the glaze bath and the lower contact roller outside the glaze bath (mm .) V: is the line speed of the metal strip (m / min), T: is the tension applied on the metal strip (kgf / mm2) and W: is the coating weight that is targeted against one of the metal strips. (g / m2) 2. Method according to claim 1, where the metal strip consists of a steel strip and a solution For hot-dip glazes, it is filled with molten zinc. 3. Method according to claim 1, where the metal strip is treated as an alloying treatment of the lower (doenstream) of the upper contact roller. 4.How to produce metal strips that are hot dip coated Consisting of Conveying metal strips through a solution for hot dip applications To deposit metal A continuous liquid on the surface of the metal strip Supporting the metal bar with a pair of support rollers submerged in the coating solution. Spraying gas onto the ring while the metal strip is removed from the glaze chamber. Then, with the wiping tip of the mouse placed over the surface of the glaze basin. Which by that To adjust the coating weight of the molten metal on that metal strip and further conveying the metal strip while supporting the metal strips on one pair of contact rollers. Top and bottom contact roller Where the L-distance between the upper support rollers is provided in the coating fluid. With the bottom contact roller arranged outside the coating bath is maintained according to the formula: L (less than or equal to) 80 XTX W2 / V, where L: is the distance between the upper support roller in the coating bath and the side contact roller. The bottom is outside for coating (mm), V: is the line speed of the metal strip (m / min), T: is the tension applied on the metal strip (kgf / mm2) and W: is the weight of the metal strip. Coating set target per side of the metal strip (g / m2) 5. Method according to Clause 4, where the metal bar consists of Steel strips and reagents For hot-dip glazes, it is filled with molten zinc. 6. Method according to claim 4, where the metal strip is treated as an alloying treatement of the lower (downstream) contact roller.