How to Perform a Visual Can-Seam Analysis

September 27, 2024


When ensuring the quality and safety of canned products, performing a thorough visual can-seam analysis is necessary. The seam of a can is where the lid and body join to create an airtight seal. This protects the product from contamination and spoilage, which is why it’s important to maintain quality and regularly check the can seam.

To perform a proper visual can-seam analysis, here’s a clear step-by-step breakdown:

1. Initial Visual Inspection:

  • Take your can and inspect the seam visually for any obvious damage.
  • Look closely around the seam for concerns such as:
  • Droops
  • Incomplete seams
  • Knocked down flanges

2. Seam Thickness and Height Measurements:

  • Measure the seam thickness at three different places around the can.
  • Measure the seam height in three locations as well.
  • Ensure you are familiar with the manufacturer’s specifications for both the can and the lid when performing checks on the seam thickness and seam height.

3. Countersink Check:

  • Perform a countersink depth check using the appropriate tool, following manufacturer specs.

4. Using OneVision for Inspection:

  • Turn on OneVision to perform a more detailed computer-assisted inspection.
  • Follow these steps:
    • Calibration: Begin by calibrating the machine.
    • Check Countersink: Start the inspection by checking the countersink depth.
    • Thickness Measurement: Measure the seam thickness in two places instead of three.
    • Seam Height: Ensure seam height is measured, focusing on the two points you selected.
    • Remember to notch the can in two places for the next steps.

5. Advanced Inspection with OneVision:

  • Once notched, measure:
    • Cover hook
    • Body hook
    • Overlap
    • Seam height
    • Run these measurements on two cans for consistency.

6. Seam Strip Inspection:

  • Take an uncut can that’s been emptied and remove the tab.
  • Use the OneVision seam stripper and sideslips to cut the notch and strip the seam.
  • The cover hook should detach easily.
  • Visually inspect for any pressure ridge and assess the overall seam quality.

7. Wrinkle Rating:

  • Once the cover hook is off, evaluate the wrinkle rating for potential can-seam defects.
  • Following these steps will help ensure that the can seam is intact and meets manufacturing standards.

Can-Seam Analysis Training

Become a can-seamer expert by getting the training you need to improve your production line, saving you time and money. View our open time slots for training classes on the training calendar.

Making Sure Your Product Stays True from Production to the Shelf

Previous Blog

Next Blog Title

Next Blog