The production process of aluminum coils mainly includes the following steps: aluminum preparation: including melting and casting of aluminum ingots to obtain aluminum materials of a certain shape and size. Hot melt casting: Heating aluminum to a molten state and forming ingots of a certain shape and size through the casting process. Pre rolling continuous casting: preliminary rolling of ingots through pre rolling process to make the material more uniform. Cold rolling: Cold processing of pre rolled aluminum materials, gradually reducing the thickness and obtaining the desired shape and size of aluminum coils through multiple passes of rolling. Annealing: During the rolling process, aluminum coils undergo strong plastic deformation, leading to an increase in internal stress. In order to eliminate internal stress and improve the mechanical properties of the material, annealing treatment is required. The annealing temperature is generally lower than the recrystallization temperature to avoid grain growth. Precision rolling: After annealing, the aluminum coil is subjected to precision rolling again to obtain more accurate thickness and smoother surface. Coating: In order to improve the corrosion resistance and aesthetics of aluminum coils, a protective film can be applied on the surface. Cutting: Cut aluminum coils into different lengths and widths according to customer requirements. The above are the main steps in aluminum coil production, through which high-quality aluminum coils can be obtained.