The first is the actual location of Color Coated Rolls:

       1. The base steel plate is scratched

       2. When the product is made of double plates, pay attention to the scratches on the reverse side, causing color cast, and the light color on the reverse side is easy to cause color cast

       3. Self-nozzle scratches: the key fingerboard with a front face

       4. Channel section

       Scratched guide plate (key reverse side)

       5. Scratches in the curing furnace

       Stove body objects are slack (common)

       Excessive tension is the face scratching, which often refers to the excessive support force when changing thick materials to thin materials.

       6. When changing direction, parking and unloading, the entrance and exit are pinched and scratched (common)

       7. The squeezing roller is scratched. Generally when the squeezing roller does not rotate

       8. Dirty things are scratched at the entrance and exit section, and there are dirt on the entrance and exit reaming drill, often referring to the reverse side or the upper knife of the scissors to scratch the surface of the color steel plate

       9. The S roller is scratched, and the actual effect of water cooling and squeezing is not very good. When the water is sent to the S roller, the tension in the furnace wall is too different from the pinch support force at the entrance and exit, which causes the S roller to deviate.

      10. The temperature of the initial coating curing oven board is not enough, and the paint is not dry and solid. The back paint is sticked off smoothly before the water cooling and heat dissipation.

       Clarify the actual position of Color Coated Rolls scratches

       1. It is first clear whether it is scratched before or after application

       2. It is scratched before drying treatment or scratched after drying treatment