The typical two-coating, two-bake continuous color coating production line follows a structured and efficient process. It begins with the uncoiler, which feeds the metal coil into the system. The material then passes through a sewing machine to join any seams or overlaps, ensuring a smooth surface for coating. Next, the material is guided through a pressure roller to maintain consistent tension and alignment.
Following this, a tension machine adjusts the material's tightness to prevent wrinkles or slack during the coating process. The opening looper helps manage the flow of the material as it moves forward. After that, the strip undergoes an alkali-based degreasing process to remove oils and contaminants, followed by thorough cleaning and drying to prepare the surface for coating.
A passivation step is then applied to enhance the material’s resistance to corrosion, and it is dried again to ensure no moisture remains. The first coating, known as the primer coat, is applied and then dried in a dedicated oven. This initial layer provides a solid base for the final topcoat.
The topcoat is then applied, followed by another drying stage to cure the finish. Afterward, the coated material is cooled down using air cooling to stabilize the coating. Once cooled, it is rewound onto a set and then passed through a winding machine. Finally, the finished product is packaged and prepared for storage in the warehouse.
LEDER LIGHTING CO.,LTD , https://www.lederlight.com