The coating of thermal insulation aluminum coil coating […]
The coating of thermal insulation aluminum coil coating is the core part of the production line. The main equipment includes a roller coater and a drying tunnel. Generally, the front or back coating process is adopted. According to the different directions of the coating roller and the transmission roller, it can be divided into There are two processes of coating and reverse coating.
Insulation aluminum coil coating process Generally, the pre-coated aluminum coil coating process can be divided into three coating processes, two coating processes and single coating processes according to the number of coating layers of the coating. According to the rotation direction of the coating roller and the transmission roller, it can be divided into two processes: forward coating and reverse coating. The coating method in which the rotation direction of the coating roller is the same as the progress direction of the substrate is sequential coating. On the contrary, it is reverse coating. Generally, the smooth coating process can only produce Aluminium Coated Sheet a lower wet film thickness, and the surface appearance of the coating film produced by this process is not ideal, and the solidification process is not used. The reverse coating process is currently the most widely used coating process. By adjusting the ratio of rotation between the rollers and the travel speed of the substrate, a coating film with the required thickness and smooth appearance can be obtained. Coating is the core part of the entire production line. The main parts of this section are: the relative rotation speed ratio between the rollers; the thickness of the substrate and the balance between the speed of the substrate and the surface temperature of the substrate; the viscosity of the coating and the difference between the rollers The size of the gap; the relationship between the dry film thickness of the coating film and the gap between the paint and the roller; the relationship between the curing time, the length of the drying tunnel, the speed of the substrate, the thickness of the substrate and the surface temperature.
Insulation aluminum coil coating post-treatment stage The post-processing section is used to further process the produced coil aluminum to give it better protection and decorative effects. Mainly include filming, printing, embossing and embossing. Here is a brief explanation: the film is to press the polyolefin peelable film on the top coat, and the printing is to print various patterns and patterns on the metal roll after the top coat. Embossing is to heat embossed patterns on the surface of the paint film. Pressing is a three-dimensional pattern that is pressed out of a steel roller with matching yin and yang patterns.