Aluminum alloy colored lacquer-coated tank cover coiled material and preparation method thereof

The invention discloses a preparation method of an aluminum alloy colored lacquer-coated tank cover coiled material and relates to the field of aluminum alloy products. On the one hand, the hardness of a coated coating roller and the surface roughness of the ground coating roller are strictly defined, so that the coating process is more uniform and full, the surface of the coated substrate is relatively good in leveling property, the chromatic aberration of a product is reduced, and the weight of the coating can be better controlled. On the other hand, the coating is filtered with a 5-20[mu]mfilter element, so that impurities in the coating can be eliminated better, and the impurity defect after coating can be better avoided. The preparation method is simple in process and high in production efficiency, and facilitates large-scaled industrial production. Meanwhile, the product is good in lacquer-coating quality on the surface and free of chromatic aberration, and can meet the existingtechnical demands of food