彩涂铝板成型的步骤有哪些？

彩色涂层铝板兼具铝板和有机材料的优点。它不仅具有机械强度高、韧性好、铝板易加工成型的优点，而且具有有机高分子涂层材料良好的着色、装饰和耐腐蚀性。可进行落料、弯曲、拉深、焊接等加工。介绍了彩色涂层铝板成形的两个步骤

1、 彩色涂层铝板的前处理
基材预处理技术是伴随着涂料生产技术而产生的。它为涂层技术提供了基础，为制备优良的涂料奠定了基础。在生产过程中，一些润滑脂和润滑剂将残留在彩色涂层铝板的所有基材表面。当然，在运输过程中可能会粘附其他物质。如果不清除这些油脂和粘合剂，将影响铝板的涂层和使用。此外，清洁的基材表面需要进行化学处理，以生成稳定的转化膜，从而提高基材的耐腐蚀性和与涂层的附着力
2、 涂层法
彩色涂层铝板的涂装工艺一般按涂装层数可分为三道涂装工艺、两道涂装工艺和单道涂装工艺。根据涂布辊和传动辊的旋转方向，可分为正向涂布和反向涂布。涂布辊旋转方向与基材前进方向相同的涂布方法为正向涂布。相反，它是反向涂层。一般来说，前向涂膜工艺只能涂刷较低的湿膜厚度，而且该工艺涂膜的表面外观不理想，因此不采用该工艺。反向涂覆工艺是目前应用广泛的一种涂覆工艺。通过调整滚轮之间的旋转比和基板的移动速度，可以获得所需厚度和平整外观的薄膜

Color coated aluminum plate has the advantages of both aluminum plate and organic material. It not only has the advantages of high mechanical strength, good toughness and easy processing and forming of aluminum plate, but also has good coloring, decoration and corrosion resistance of organic polymer coating materials. It can be easily processed such as blanking, bending, deep drawing and welding. The following two steps of color coated aluminum plate forming are introduced

1、 Pretreatment of color coated aluminum plate
Substrate pretreatment technology is produced with the production of coating technology. It serves the coating technology and lays the foundation for the preparation of excellent coatings. Some grease and lubricants will remain on the surface of all substrates of color coated aluminum plate during the production process. Of course, other substances can be adhered during transportation. If these grease and adhesives are not removed, It will affect the coating and use of aluminum plate. In addition, the clean substrate surface needs to be chemically treated to generate a stable conversion film, so as to improve the corrosion resistance of the substrate and the adhesion to the coating
2、 Coating method
Generally, the coating process of color coated aluminum plate can be divided into three coating processes, two coating processes and single coating processes according to the number of coating layers. According to the rotation direction of coating roller and transmission roller, it can be divided into forward coating and reverse coating. The coating method with the same rotation direction of coating roller and the progress direction of substrate is forward coating. On the contrary, it is reverse coating. Generally, the forward coating process can only paint a lower wet film thickness, Moreover, the surface appearance of the film coated by this process is not ideal, so this process is not used. The reverse coating process is a coating process widely used at present. By adjusting the rotation ratio between rollers and the travel speed of the substrate, the film with the required thickness and flat appearance can be obtained