9. Station: Necking in

-> Video for modem connection

-> Video for broadband connection

The diameter of the can which is still cylindrical needs to be reduced in the upper section to accommodate the smaller end. During the necking in process the can is loaded on to a lifter and the axial movement of the lifter presses the open edge into the outer tool.

There the upper rim of the can is bent inwards and the diameter cylindrically reduced by approx. 1 mm. The lifter is then withdrawn, the can is pushed out of the tool using compressed air and conveyed to the next station. There the diameter is reduced further following the same procedure. A total of 15 stations are required in order to obtain the required final diameter.

1. Blanking and Deep-drawing 2. Wall-ironing and end forming 3. Trimming 4. Washing 5. Outside coating 6. Printing 7. Drying 8. Initial internal coating	9. Necking in 10. Flanging 11. End coating 12. Second internal coating 13. Testing for holes and flange cracks 14. Testing for internal defects 15. Palleting