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  • Dongguan Meidele Metal Detector Factory
  • ADD: Dongcheng District, Guangming Village, Wanhang Technolog Park, Dongguan City of Guangdong Province, China.
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  • Undetectable glass foreign body
    Mar 02, 2019

    Undetectable glass foreign body


    Recently, when consumers consume a famous ice cream brand store, they are injured by the glass foreign objects in the ice cream, and the blood flow is not limited. On the issue of injury, consumers have had a long negotiation with the brand. The appearance of foreign matter in food not only causes harm to consumers, but also negatively affects the brand itself.


    So how do you avoid products containing glass foreign matter from flowing into the hands of consumers? A statement: The content of this article comes from: METTLER TOLEDO product testing, reprint, please indicate the source of the best way is to introduce X-ray detection technology in the production process. The glass is fragile, and the producers are more likely to mix the glass shards into the jar. How to detect broken glass in glass jars? This is cumbersome, but METTLER TOLEDO's X-ray inspection system can make foreign objects look like nothing.




    What are the difficulties in detecting glass foreign bodies?



    Density is the key to everything! Proper use of X-ray inspection technology can achieve the best test results.



    The glass bottle itself and the product inside have different densities, which affects the absorption of X-rays for detection, which in turn affects the sensitivity of the detection. So what are the problems that affect the accuracy of detection?


    1. Broken glass in a glass jar

    The main foreign body threat in glass jars is broken glass. Since they are also glass, this is a major challenge for X-ray inspection machines. It is the leading technology company in the industry to detect broken glass in glass jars.

    Our approach is that the same batch of glass jars are "looking up" exactly the same, but due to the different melting processes, their density and chemical composition are very likely to be different. Foreign objects are found by different density displays.


    2. The shape and decoration of the glass jar

    The simpler the shape of the container, the easier it is to check. If the glass can is decorated with square edges or embossing, it will cause blind spots in the inspection, which will reduce the detection sensitivity of the internal product.

    Our approach is to overcome the effects of these special shapes and decorations by repeatedly presenting empty cans into X-rays, allowing the machine to "learn" the results of the correct packaging, and then use fixed-width filters for filtering in the tests to overcome these special shapes and decorations. Blind spot.




    3. The nature of the product itself

    For fast-filling large-volume liquid products, such as beverages, foreign matter may be washed from the bottom and suspended in the can. For hot-filled semi-solid or thick granule products, such as sauces, foreign matter will be moved to a position close to the bottom of the can due to viscous and the like.

    Our approach is to compensate for the specific location by determining the nature of the product to find the most likely location of the foreign object.



    4. Cap

    The cap may contain a metal seal, a rubber seal or a glass thread, which causes an overall density change.

    Our approach is to use X-rays to compensate for the presence of foreign matter at locations where the natural thickness of the sidewalls of the cans is different.






    Designed for glass filling companies


    Although each glass bottle has many different X-ray detectors that can penetrate the density, can it ensure that the density differences mentioned above are accurately measured? METTLER TOLEDO's advanced X-ray inspection technology solutions ensure that detection sensitivity is fully optimized. To increase the probability of detection, each can be fully inspected from the lid to the base and from different viewing angles.