Method for continuous producing rust-inhibiting primer coating steel plate

Abstract

The invention provides a method for continuously producing rust-proof primer coated steel plate applied to the coating production field in the metallurgical industry. The method is characterized in that the defect of discontinuous former production is overcome and all processes are continuously completed on line. The method comprises the following steps: the head and tail of a hot-rolled steel band are welded together; the steel band enters a pickling tank to remove the oxide of the surface, and enters a hot air drying segment to remove the moisture of the surface; the steel band enters a roll coater 11 to coat the surface of the steel band and is then transmitted to a paint curing furnace 12 to cure and dry the band; the steel band with a certain temperature is blown by cold wind 14 to reduce the temperature; the steel band enters a horizontal type loop 15, is corrected an error through a loop 21, and then enters a flying shear 22 for definite distance cutting in order to be cut into the required plate according to the requirement; and then the steel band enters a dual stacking 23 to be stacked into a sheet bar with the defined height. When coiled materials are required, the steel band is longitudinally sheared into strip by a disc shear, then is coiled separately by a dividing shear, and enters a rolling machine 20 to form a coiled steel band.

Description

technical field [0001] The invention belongs to the field of coating production in the metallurgical industry, especially the coating of hot plates. Background technique [0002] At present, some of the original thin painted sheets in China use cold-rolled sheets as the original sheet, and the cost is high, which is 30-40% higher than that of the hot-rolled sheet as the original sheet, while the hot-rolled thin slab is less than 1.2mm. From hot casting (Giesshitze), the continuous expansion and rapid development of the range of hot-rolled sheets makes it possible to use hot-rolled sheets as the original sheet. At present, the technology of using hot-rolled sheet as the original sheet in China is to firstly carry out the uncoiling and leveling of steel coils, cut to length, stacking; sandblasting and derusting, painting, drying, cutting to length and four sides, stacking and other processes It is divided into three production lines. Firstly, a transverse cutting line is used...

AI Technical Summary

Problems solved by technology

The entire production process cannot be operated continuously, and the intermediate transportation links are complicated. Sand blasting and rust removal cause the surface roughness of the steel plate to increase; when spraying paint, it must be atomized, so the amount of paint wasted by aerosol treatment is very large, and the pollution is serious. The land area is large, the cost is high, the production efficiency is low, and the labor intensity is high

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