Step 1: Casting

The first step in the production of aluminium coils is casting. Molten aluminium is poured into a casting machine, where it is solidified into a slab or billet. The size of the slab or billet depends on the desired thickness of the final product. The slab or billet is then transferred to a homogenizing furnace, where it is heated to an even temperature to improve its microstructure and reduce any internal stresses.

Step 2: Rolling

The next step in the production of aluminium coils is rolling. The slab or billet is passed through a series of rolling mills, which reduce its thickness and increase its length. The rolling process is conducted at high temperatures to improve the ductility of the aluminium and reduce the risk of cracking. The rolled aluminium is then cooled and trimmed to the desired width.

Step 3: Annealing

After rolling, the aluminium is annealed to improve its mechanical properties. The annealing process involves heating the aluminium to a high temperature and then cooling it slowly to room temperature. This process improves the aluminium’s strength, ductility, and formability. Annealing can be conducted in a batch furnace or a continuous annealing line.

Step 4: Slitting

The final step in the production of aluminium coils is slitting. The annealed aluminium is passed through a slitting machine, which cuts it into narrow strips of the desired width. The strips are then coiled and packaged for shipment.