Aluminium foil manufacturing process

  The aluminium foil manufacturing process consists of smelting, rough rolling, intermediate rolling and aluminum foil blank rolling.

  Smelting

  Aluminium ingots are placed into the furnace to get smelted, and aluminium liquid flows into the casting mill through the launder, during which the the refiner A1-Ti-B is added to form a continuous and uniform refining effect. Gases and slags get removed constantly and uniformly by the graphite rotor.

  Rough Rolling

  The aluminum liquid from the first step becomes a billet. The temperature of inflow water in the inner cavity should be kept between 20 and 23 degree centigrade, and that of outflow water between 28 to 32 degree centigrade. The static pressure of the aluminum melt between the rolls is controlled at 0.004-0.005mpa, so as to ensure that the crystal direction {100} of the material is more than 95%, the grain size is less than 5um, and the slab of 6.5-7.5mm is rolled.

aluminum foil manufacturing process

  Intermediate Rolling

  The above slabs are rolled again by cold rolling mill. When the thickness reaches 4.5mm, they are sent to the annealing furnace. After heating to 360 ℃ and holding for 2 hours, they are continuously heated to 580 ℃ and holding for 18 hours. Homogenization annealing is carried out to make the grain size uniform and consistent in direction. Then, the slabs are continuously cold rolled to 0.60mm in cold rolling mill and sent to annealing furnace again, heating to 460 ℃ and holding for 5 hours. When the they cool down to 400 ℃, have them heat preserved for 7 hours to conduct intermediate annealing, and then continue rolling them to 0.3mm thick.

  Aluminum Foil Blank Rolling

  This step uses the four roll irreversible foil rolling mill to roll the above 0.3mm aluminum foil blank into the finished aluminum foil product.

  The aluminium foil manufacturing process above is short and cost efficient. It enables you to produce ultra-thin aluminum foil of advanced level with a small investment scale. Compared with the hot rolling production process, the investment cost is reduced by two-thirds and the operation cost is reduced by more than half.

Haomei supplies aluminium foil 8011, 8021, 1-7-, 1060, 3003 and 8079 of all regular specifications. Welcome to contact us for more information!

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