Why Are Vision Inspection Systems Used in the Necker?
Once cans leave the Necker, they move to the Palletizer to be stacked and prepared for shipping. Defective cans cannot be included in these pallets, as they can compromise the entire shipment. Vision inspection systems address this challenge by inspecting every single can for defects.
Common Defects Detected by Vision Systems
Vision systems are designed to catch a wide range of defects, including:
- Draw Marks: Scratches or marks from the metal forming process.
- Foreign Objects or Contamination: Debris that may compromise the can's safety or usability.
- Deco (Ink) on the Inside: Ink from the decorating process.
- Necker Wax on the Inside: Residual wax used during necking.
- Oil and Grease on the Inside: Lubricants that can contaminate the can.
- Partial or Short Laquer Sprays: Insufficient internal coating applied by the IC Spray machine, which can lead to Metal Exposure.
- Pleats and Puckers on the Neck: Deformations caused during the necking process.
How Vision Systems Work
The vision systems use advanced cameras and sensors to identify damage, defects, and contamination. When a defective can is detected, the system rejects it using an compressed air blow-off valve. This ensures that only high-quality cans continue through the production process. Operators are continuously notified and kept up to date through a reporting interface near the Necker.
