Production line for spraying color steel plate

Abstract

The invention provides a production line for spraying a color steel plate, wherein a plurality of tension rollers are used to flatten a steel belt in each process section, and especially, stable constant tension is provided for an air-brush section. Meanwhile, in the production line for spraying the color steel plate, provided by the invention, corona treatment is performed on the surface of the steel belt before a spraying section to form a plurality of small pits in the surface of the steel belt, so as to improve the surface roughness of the surface of the steel belt, so that adhesive force between the surface of the steel belt and a color image layer is improved, the color image layer hardly undergoes paint peel-off phenomenon, and the formability of the steel belt is improved.

Description

technical field [0001] The invention relates to a production line for color steel plates, which belongs to the field of color steel plate manufacturing. Background technique [0002] Cold-rolled sheets and hot-rolled sheets are mainly used as raw materials in the existing domestic color steel production. The traditional color steel plate production is divided into three production lines: firstly, use a transverse cutting line to uncoil and level, cut the steel plate to the required length, and then stack the steel plates to the required height; then use A spraying line (or roller coating line), which sends the steel plate to the sandblasting derusting machine by conveying, blasting and derusting each steel plate, and then sending it to the spraying line (or rolling coating line) for spraying or rolling coating; spraying (or roller coating) After that, the dried steel plate is sent to the roller machine through the conveyor belt for roller forming. After forming, it is cut ...

AI Technical Summary

Problems solved by technology

The above-mentioned color steel plate production line has the following problems: continuous operation cannot be performed during the entire production process, and the intermediate transportation link is complicated, resulting in low production efficiency

[0004] In this production line, the painted steel strip is directly subjected to curing and drying treatment and cooling treatment and used for roller forming. Although the simple curing and drying is compared with natural drying However, the adhesion of the paint (or color layer) to the surface of the steel strip after painting (especially the color layer) of the color steel plate is low, which leads to the deterioration of the color steel plate in the later stage. Poor formability, especially in the bending forming process, the color layer is often easily separated from the steel plate, forming a "paint falling" phenomenon, especially in the forming of a patterned steel plate, this "paint falling" phenomenon will lead to incomplete patterns sex

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