Main defects of a 2pc aluminum can

There are several defects that can occur in the manufacturing process of an aluminum can. Some of the main defects mentioned are:

1. 1. Tears: These are significant defects in which part of the aluminum can body is torn during the forming process. Tear offs can be caused by material imperfections, poor lubrication, damaged or out-of-specification tooling, incorrect settings on the hollowing press or body former, or contamination in the coolant oil.
2. Leakage: This defect can occur when the inner lining of the can is compromised, allowing the contents to come in contact with the metal.
3. 3. Striae: Refers to unwanted marks or scratches on the surface of the can, which can affect both its appearance and structural integrity.
4. Split flange: This defect occurs when the flange (the edge where the end of the can is sealed) splits or cracks.
5. Neck creases or wrinkles: These are wrinkles or creases that occur in the neck area of the can, which may affect the seal with the lid.
6. Fractured domes: The dome is the lower part of the can, and a fracture here can compromise the can’s ability to withstand internal pressure.
7. Dome wrinkles: Wrinkles in the dome area, similar to neck creases, can affect the strength and integrity of the can.
8. 8. Water stains: These are discolorations typically caused by water or other fluids, which can affect the appearance of the can.
9. 9. Split can: This defect occurs when the body of the can itself splits, which may be due to various factors, such as material defects and inadequate forming processes.
   10. Short can: This defect occurs when the can does not reach the intended height, often due to a break in the can wall during the ironing process.
10. Uneven can height: This defect occurs when cans are not uniform in height, which may be due to tooling misalignment or inadequate lubrication.
11. Ironed scrap: This occurs when scrap from previous tears is ironed onto the can wall, indicating problems with scrap removal or previous defects.
12. Stains: Unwanted marks on the can that may be random and not oriented to the rolling direction of the metal, potentially due to foreign material in the process or contact with tooling.
    • Can pre-cutting: This occurs when the can is removed from the punch before the ironing process is complete, resulting in short cans, marks or bulges.
    • These defects can be due to various problems within the production line, and identifying the root cause is essential to implement corrective measures. the importance of analyzing failure patterns and root cause analysis to effectively address these defects.

causes and possible solutions for tears? Understanding Dome Wrinkles in Canmaking: Causes, Detection and Prevention  Dome Wrinkles in Can Manufacturing Can Defect: Puckers Split Flange Defect in Beverage Cans Bleed Through in Aluminum Can Manufacturing The Influence of Physicochemical Parameters on Can Defects: A Statistical Approach Main varnishing defects in tinplate? Aluminum Can Decorator Defects: Causes, Effects and Solutions Troubleshooting strategy for an aluminum beverage can production line