Color coated sheet coil

The production process of color coated sheet coil is a complex and delicate process, mainly including the following steps:

Uncoiling and Stitching

After the color coated substrate is put online, the first step is to perform the unwinding operation, unfold and sew the substrate onto the previous substrate to achieve continuous production. This step ensures the continuity and stability of the production process.

Pre processing

Pre treatment is a key step in the production of color coated sheet coils, mainly including degreasing cleaning and chemical pretreatment.

1. Degreasing cleaning: Remove oil stains and other impurities from the surface of the substrate to ensure good adhesion between the subsequent coating and the substrate. This step usually involves multiple cleaning and drying processes.

2. Chemical pretreatment: Chemical treatment is carried out on the surface of the substrate, such as roller coating with passivation solution, to improve the adhesion and anti-corrosion ability between the substrate and the coating. After the passivation solution is dried, the initial coating is carried out, which is roller coating primer.

Painting and curing

The painting process is the core part of color coated sheet coil production, mainly including the coating and curing of primer and topcoat (including back coat).
1. Primer application and curing: After the initial application of primer, dry and cure the primer. Curing refers to the process in which a coating undergoes chemical condensation from a liquid state to a solid state under certain temperature and other conditions through the main film-forming substance, auxiliary film-forming substance, and curing agent.

2. Coating and curing of topcoat and backcoat: After the primer is cured, precision coating is carried out, that is, roller coating of topcoat and backcoat. Both topcoat and back coat require drying and curing. This step ensures the quality and durability of the coating.

Cooling and winding

The painted and cured color coated sheet coil needs to be cooled to ensure the stability and performance of the coating. After cooling, the color coated plate roll is rolled up for subsequent processing and use.

Quality inspection and grading

During the production process, it is also necessary to inspect the appearance and performance of the color coated sheet coil to ensure that the product quality meets the standards. After passing the inspection, it will be divided into rolls according to customer needs to meet the requirements of different specifications and uses.

Packaging and factory delivery

Finally, pack the color coated sheet rolls after division for transportation and storage. After packaging is completed, the color coated sheet roll can be sold from the factory.
In summary, the production process of color coated sheet coils includes multiple steps such as unwinding and stitching, pre-treatment, painting and curing, cooling and winding, quality inspection and slitting, and packaging and delivery. Each step is crucial to ensure the quality and performance of the color coated sheet coil.