A method of manufacturing a shell element (13) for an electronic device, said shell element (13) having a front (5) and at least one part that is angled in relation to said front (5), said shell element (13) further comprising a formed sheet (6) that constitutes at least a part of the outer surface of said front (5) and at least a part of said part that is angled in relation to the front of the shell element (13), said method comprising the steps of:
- forming a sheet (1) to a desired shape including a part that is angled in relation to a front part (5),
- injection moulding a plastics material on the back of the formed sheet (6),
- characterised in
- providing at least one opening (7) in the angled part of the formed sheet (6) before the plastics material is injection moulded on the back of the formed sheet (6) and leaving the at least one opening (7) open during the injection moulding of a plastics material on the back of the formed sheet (6).