Food metal detectors are familiar to everyone. The metal detectors machine uses "balanced coil" detection heads. The detector of this design can detect various metal contaminants. These include ferrous metals, non-ferrous metals and stainless steel in fresh and frozen foods. Products that are packaged or not can be tested, and products packaged in metal film can also be tested. Metal detectors are widely used and have many uses. They have become the main component of many food processing lines in Asia.
In China, food safety has always been very severe. No matter how strict the management procedures are in the production process, and the corresponding protective measures have been taken to deal with the influx of metal foreign bodies, it cannot be completely ruled out. Once these unqualified and unsafe products enter the market for sale, they will cause major harm to the health of consumers and also cause the company's product brand to drop significantly.
Pollution sources usually include the following four types:
Caused by raw materials, typical examples include: metal tags and syringe needles in meat products, metal wires in wheat, broken mesh wires in powder materials, tractor parts in vegetables, fish hooks, and metals in material containers Hook and loop and wire bundle.
Caused by human factors, buttons, pens, jewelry, coins, keys, hair clips, thumbtacks, pins, paper clips, etc.
It is caused by repairs and maintenance, such as screwdrivers and other repair tools, metal cutting and welding slag generated after repairs, copper wire scraps after electrical repairs, improper cleaning or negligence caused other items to be missed, and metal scraps generated by pipeline repairs.
Caused by in-plant processing, during product handling or processing, mills, mixers, mixers, slicers, and conveying systems can cause metal contamination, such as broken screens, metal fragments generated by milling machines, and recycled products In the foil.
The use of metal detectors is a necessary means to prevent metal foreign objects from being mixed into products. As the first person responsible for food safety, food companies must earnestly take responsibility for protecting the health of consumers, their own brands, and establishing a food safety culture.
In the food industry, metal detectors machines are mainly used to detect metal impurities. There are two types of metal detectors for food: belt type and pipeline type. The belt type is a conveyor belt. Put the food on the belt and pass the probe if it contains metal impurities, it will alarm and stop or remove it. The pipeline type is mainly a free-falling type, where the food falls freely, and the probe will alarm and then be discharged.
At present, Germany has the best number of metal detectors for food, and foreign products in China are mainly made in Japan. The Japanese have strict requirements on food metals. The standards they put forward in Chinese food processing cannot meet the requirements for most domestic products. Some special foods cannot meet the requirements even for German products, such as fresh meat. Category, pickles, canned food. Some domestic practices that make products qualified are trade secrets and are not convenient to disclose. Metal detectors machines are based on electromagnetic principles and are easily disturbed. The standard of the test block is generally determined by the manufacturer.