Aluminum foil manufacturing process
The aluminium foil manufacturing process can be divided into 9 steps, that is casting – uniform treatment – surface cutting – hot rolled – cold rolled – foil roiling – wash winding – annealing – cutting. 1, Casting The production castings, fine aluminum ingots (to remove impurities) suitable for for rolled, heated to melt into molten metal. Some manufacturers will add the rolling debris to formulate different purity aluminum ingots, but the total purity is guaranteed. Molten metal generally use rolling to become billets by continuous casting. 2, Uniform treatment The cast billet is maintained at a high temperature close to the melting point (20-30 hours), is homogenized. As a result of this treatment, the deformation in the casting can be well eliminated, and the impurities also dissolve in solid solution and the impurity distribution becomes uniform. 3, Surface cutting Billet has irregular surface and the oxide layer.. So it is need to be cut about 8-10mm’s thick. 4, Hot-rolled...