How is aluminum coil made?

Aluminum coil is made through a series of processes starting with the melting of aluminum ingots or scrap. The molten aluminum is then poured into a casting machine where it's cooled and solidified into large slabs. These slabs are then heated and passed through a series of rolling mills to reduce their thickness and achieve the desired coil gauge. The rolling process is often hot or cold, depending on the final application of the coil. After rolling, the aluminum is coiled into rolls and may undergo additional treatments like annealing to improve its properties. Finally, the aluminum coil is cleaned, inspected, and shipped for use in various industries such as construction, automotive, and packaging.