How to solve the surface scratch problem of color coating board?

Color coated board is a combination of metallurgy and chemical surface treatment engineering important products, to ensure the quality of color coated board is very important, but color coated board in the process of production, handling and use inevitably bump, resulting in product damage, affect the normal use. In order to ensure the normal use of products, for you to explain the color plate surface scratch problems and solutions.

Surface scratch is a kind of surface defect in the production of color coating board. It not only affects the appearance of color coating products, but also reduces the corrosion resistance of color coating products. It can be divided into raw material scratches and production process scratches according to the source:

Raw material surface scratch

Raw material surface scratch refers to the quality defect of the substrate during the production of galvanizing. When the substrate with scratches is used to produce color coating board, it is easy to produce color difference on the surface of the color coating board and even the quality defect of missing coating.

Specific solution: Control measures to check the production quality in the process, to prevent the raw material substrate with scratches into the factory.

The scratch produced during the production of color coating board

A. There are foreign body scratches on the surface of the inlet and outlet guide plates, and the defect is located on the back of the steel plate. The main cause of the problem is foreign body on the surface of the guide plates.

Specific solutions: regularly check guide wear, repair, adjust; Tighten loose screws on the guide plate and remove foreign bodies on the surface of the guide plate.

b. The spray pipe is scratched, and the defect is located on the back of the steel plate. The main cause of the problem is that the tension is too small, and the lower surface of the strip is in contact with the nozzle.

Specific solution: appropriate increase cleaning section strip tension.

c. Extrusion roll scratch, the defect is located at the front and back of the steel plate, the main cause of the problem is foreign matter on the surface of the roller or extrusion roll bearing stuck.

Specific solution: remove the foreign body on the surface of the roller, adjust the extrusion roll or bearing.

d and S roll scratch, the defect is located on the front and back of the steel plate, the main cause of the problem is that there are foreign bodies on the surface of the roller, the tension in the furnace body and the tension of the outlet lopper is too large, resulting in the slip of S roll.

Specific solution: remove the foreign body on the surface of the roller, adjust the outlet looper and the tension control in the furnace.

e. Curing furnace scratch, the defect is located in the front and back of the steel plate, the main cause of the problem is improper control of the tension in the curing furnace, the steel plate sag scratch the back of the tension is too small, the furnace mouth scratch the front of the strip steel when the tension is too large production thin material.

Specific solution: adjust the tension control, control the overhang position of strip steel.