14. Station: Testing for internal defects

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This test is a continuous 100% test of the inside of the can. It is performed by a CCD line scan camera system comprising five cameras.Camera no. 5 monitors the end and the lower section of the can. Cameras nos. 1, 2, 3 and 4 concentrate on the respective internal section of the can allocated to them.

The images from the five cameras are compared with a specified image in the computer system connected downstream. As soon as one of the five camera images does not correspond to the specified data in the computer system, then the can is removed from the can flow via a blow-off station.

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