Production process overview

In the manufacturing of rolled aluminium for brazed heat exchangers within Gränges there are several different process steps involved – from melting and casting to the final slitting and packaging. Each process step has its complexity as for instance the cladding process where one or several clad alloys are bonded to the core via the hot rolling process.

1. Casting    2. Homomogenization (for thicker gauge materials)    3. Scalping (removing the outer skin of the cast ingot)

4. Plate rolling and cutting and plate welding to core

5. Pre heating    6. Hot rolling (break down mill)    7. Hot rolling (final mill to coiling)

8. Cold rolling    9. Annealing (intermediate- or final annealing)

10. Slitting