The invention discloses a preparation method for a double-sided light
aluminum foil. The preparation method comprises the following steps that (1) cast-rolling is performed, wherein an aluminum alloymaterial and an aluminum
ingot are put into a
melting furnace for melting, after standing is performed through a standing furnace, a molten liquid is filtered, and a cast-rolled plate is obtained after multiple times of cast-rolling is performed by a cast-rolling
machine; (2) cold rolling is performed, wherein the cast-rolled plate is cooled to
room temperature, multiple times of cold pressing isperformed by a cold press, and then multiple times of annealing treatment is performed to obtain an
aluminum foil stock; (3) an
aluminum foil working procedure is performed, wherein the aluminum foilstock undergoes five passes of rolling working procedures to obtain a finished aluminum foil, the
first pass of the rolling working procedure to the third time of the rolling working procedure are rough rolling, the thickness of the obtained aluminum foil is 0.03 mm, the fourth pass of the rolling working procedure is intermediate rolling, the thickness of the obtained aluminum foil is 0.014 mm, the fifth pass of rolling working procedure is finish rolling, and the aluminum foil with the thickness of 0.009 mm is obtained. According to the method, the distribution of reduction pass of an aluminum foil rolling working procedure is adjusted again, the pass
reduction rate of the third pass is properly improved, the pass
reduction rate of the fifth pass, namely, the pass
reduction rate of the final pass is reduced, so that the reduction process speed is reduced, and the thickness of the product is reduced easier.