Can Seam Droops, Vees and Leaks

Classify the visible defect, identify the seaming head, hold affected product and perform a qualified teardown. Check product contamination, end feed, flange condition, roll profile, chuck condition, baseplate pressure and pin height.

Stop automatic operation, isolate electrical and pneumatic energy, close and depressurize product circuits, and follow the machine lockout/tagout procedure before opening guards or removing a valve. Quarantine product made since the last confirmed good check.

Locate the fault

• A smooth droop or V-shaped projection extends below the seam
• The seam feels sharp or shows a cut-over
• Leaks appear after handling or cooling
• One head has poor overlap or excessive wrinkles

Inspection sequence

1. Stop and identify the last confirmed acceptable seam check
2. Classify the visible defect and map it to head and angular location
3. Perform teardown measurements and tightness evaluation to the supplier specification
4. Inspect fill control and foam that may contaminate the seam area
5. Check roll freedom, profile, chuck lip and tooling cleanliness
6. Verify baseplate pressure, pin height and setup records after safe isolation

Corrective work

• Correct fill or foam control so the seam area remains clean
• Clean, replace and set seaming tooling with qualified procedures
• Restore lifter pressure and pin height to the specified setup
• Segregate all potentially affected cans for authorized evaluation

Operating records and follow-up

• Conduct frequent documented visual and teardown checks
• Inspect immediately after a jam or adjustment
• Keep seaming tools matched and protected
• Control fill level and foam before the seamer
• Train more than one qualified closure inspector per shift

Equipment details: Craft Beer Can Filling Machine.