13. Station: Testing for holes and flange cracks

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We test all the cans produced for holes and flange cracks. These two types of defect can occur due to the great degree to which the tin plate is formed. Each can is picked up by a support spindle and immediately moved in an axial direction until the open side has reached the flange seal.

It is then conveyed passed a series of lights by the turret wheel. That means that light is shed on to the body of the can. If a hole or a flange crack allows light into the inside of the can, then the sensor on the open side of the can reacts in such a manner that this defective can is ejected whilst the machine is operating at full speed.

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