During the use of color-coated boards, some minor problems are inevitable, and we must face these problems. Below, the editor will list in detail the problems that may occur based on his 10 years of experience in the color-coated board industry.

First, the specific parts of the color-coated board: 1. Scratches on the substrate

2. Pay attention to scratches on the back of the product when making a single board, which will cause color difference. The back is light in color and is prone to color difference

3. Scratches on the spray pipe: mainly refers to the board belt

4. Entrance section

Scratches on the guide plate (mainly on the back)

5. Scratches in the curing furnace

Sag of objects in the furnace (common)

Excessive tension causes scratches on the front, mostly referring to excessive tension when thick materials are replaced with thin materials.

6. When emergency stop or parking to unload, the exit loop is scratched (common)

7. Scratches on the squeeze roller. Usually when the squeeze roller does not rotate

8. Scratches on the exit section by foreign objects, there are foreign objects on the exit guide plate, mostly scratches on the back or the knife on the scissors

9. Scratches on the S roller, poor water-cooling squeeze effect, water is brought into the S roller, the tension in the furnace body is too different from the tension of the exit looper, causing the S roller to slip.

10. The initial coating and curing furnace plate temperature is not enough, the paint is not cured well, and the water-cooled front stabilizing roller sticks off the back paint

Determine the specific part of the color-coated plate scratch

1. First determine whether it is scratched before or after coating

2. Is it scratched before or after drying