27 Jun 2024



Empty can inspection is a crucial step in the production process, directly influencing the quality and safety of the final product. Defective cans can compromise the integrity of the content, causing leaks, contamination, and customer dissatisfaction. The main objectives of empty can inspection include identifying both structural and surface defects, preventing contamination that could compromise food safety, and optimizing production by reducing waste to improve line efficiency, ensuring that only compliant cans proceed in the production process.

Ensuring the Quality of Empty Cans: Defect Analysis

Structural Defects

Structural defects involve physical alterations that can compromise the integrity and functionality of the can. These defects affect the can's ability to maintain internal pressure and can lead to content leakage. For example, significant deformation can make proper stacking of cans difficult, causing logistical problems and increasing costs. Additionally, deformations in the can or its closure can cause jams in processing machines, slowing down production and negatively impacting line efficiency. Through empty can inspection, it is possible to identify dents and deformations, such as surface depressions or any alterations to the original shape, typically flange ovalization. These defects can result from impacts during handling, transport, or during the production process (e.g., from faulty machinery). These imperfections can compromise the structural integrity of the can, making it more susceptible to leaks or breaks, and causing problems during filling. Moreover, small cracks or fractures in the can structure can be present, stemming from pressure overload during filling or defective materials. The risk of leaks is high, with potential repercussions on food safety.

Surface Defects

Surface defects refer to imperfections that do not necessarily compromise the can's structure but can affect aesthetics and perceived quality. Common defects include scratches, stains, and painting flaws, which make the product less attractive to consumers and give a perception of low quality.

Closure Defects

If the edge of the can is irregular or damaged, it can compromise the airtight seal of the can, increasing the risk of leaks or product contamination. Seaming and flanging procedures must be carefully controlled to ensure a safe and reliable closure.

Empty Can Inspection: The Antares Vision Group Solution

Antares Vision Group’s solutions for empty can inspection rely on high-resolution vision systems combined with lighting systems that utilize specific wavelengths, significantly enhancing the ability to detect otherwise hard-to-see defects. The employed cameras capture detailed images of the cans at high speeds, which are processed through advanced algorithms that identify and classify defects, allowing for the rejection of defective cans. To ensure comprehensive inspection of the can, multiple cameras are used from different angles, identifying defects that may only be visible from specific perspectives, thus increasing accuracy and reducing false positives. The advanced analysis software is programmable and customizable to meet the specific needs of the production line and continuously improves its detection capabilities through algorithm updates. The intuitive user interface is designed to be easily accessible to operators, allowing them to monitor and manage the inspection system without difficulty. The dashboard provides real-time detailed data on system performance, and accurate recording of inspection results is crucial for identifying trends and implementing corrective actions to make data-driven improvements and respond quickly to emerging issues.

It might be interesting too