Mirror polished aluminum coil is a kind of aluminum coil with precision polishing treatment to achieve mirror effect on the surface. It is widely used in many fields such as architectural decoration, automobile manufacturing, electronics and electrical appliances, aerospace, etc. with its extremely high flatness, brightness and good corrosion resistance and ductility, showing excellent aesthetics and practicality.
The production process of mirror polished aluminum coil involves several steps to ensure that the final product has high reflectivity and quality surface finish. The following are the main steps involved in the production of polished mirror finish aluminum coil:
– Casting and rolling: First, aluminum ingots are melted by heating and then made into aluminum coils by a continuous casting and rolling process. This step forms the basic shape and thickness of the coil.
– Hot & Cold Rolling: Aluminum coils are subjected to hot and cold rolling processes to achieve the desired thickness and mechanical properties. During the cold rolling process, the surface of the aluminum coil gradually becomes smoother.
– Annealing: Rolled aluminum coils are often subjected to an annealing process to remove internal stresses and improve the material’s ductility and processability.
– Surface Treatment: Prior to polishing, the surface of aluminum coils may need to be chemically cleaned or acid washed to remove oxidation and impurities and ensure a clean surface.
– Polishing: Aluminum coils are polished using mechanical polishing equipment. The polishing process usually consists of two stages, rough polishing and fine polishing, to obtain a mirror finish. Polishing pastes or liquids may be used during the polishing process to enhance the surface finish.
– Anodizing (optional): To improve corrosion resistance and surface hardness, mirror polished aluminum sheet coil may be anodized. This step can also give different color effects to the aluminum coil.
Inspection and Packaging: Finally, the polished mirror finish aluminum coil is inspected for quality to ensure that it meets the specifications. Qualified products are then cut, packaged, and prepared for shipment.
Precise control of these steps and the high quality of the raw material are the keys to ensuring that mirror polished aluminum coil have excellent reflectivity and surface finish.