Rolling

Ingots made during casting pass through a scalping machine where surface oxides are scraped off providing a smooth rolling surface. Ingots are then pre-heated to about 500°C and passed through a series of rolling mills which reduce the thickness to between 6 mm and 2.5 mm. This material is coiled (rolled onto a cylinder) and cooled in preparation for cold rolling.

Subsequent rolling and annealing of the cold metal increases the strength of the aluminium alloy which enables it to be formed into the various components of the aluminium beverage can by the can manufacturers.

The final product is trimmed and coiled before packing.

• Tab stock, used to open the can, is coiled and cut into narrow strips.
  
• End stock, for the top of the can, is trimmed, levelled, washed and coated.
  
• Body stock, used for the bottom and sides of the can, is trimmed to width.
  

All bare and coated product is oiled to protect the sheets during transport and assist production of aluminium beverage cans by the manufacturer. The finished and packed coils are loaded onto semi-trailers for transport to export shipping terminals or direct to customers (can manufacturers). Highly specialised packaging is used to prevent damage to the metal.