Choose the detection equipment to choose product safety

With the continuous development of packaging technology and the continuous deepening of the concept of food safety, there are more and more food companies that use metal detection equipment. However, many metal detectors do not perform well today. In particular, the detection of very low-quality metals, non-ferrous metals (such as copper, brass, and low-carbon steels), or non-magnetic stainless steels does not perform satisfactorily. These detectors are often tested for their detection performance by metal balls, rather than performance tests using metal contaminants produced in the production process, such as wire, nails, metal shavings or stainless steel encountered in actual production (metal ball test The law has become the industry standard testing method for testing machine performance, and it is also a common method for comparing the performance of different inspection machines). In fact, slender iron wires and metal shavings that are smaller than metal spheres cannot be detected by some testing equipment. This phenomenon is called directional interference. It is these slender and metal shavings that are the greatest threats to product safety, so the idea of ​​using metal ball testing to ensure safety is wrong.

The only solution to these problems is to install the latest high-frequency detectors to truly eliminate metal contamination. Sometimes, inspection machines detect different products of metal packaging materials, and sometimes detect products with small or non-metallic packaging materials, so the frequency of detection will vary depending on the product. In this way, it is necessary to select a broadband detector, such as Safeline's Signature WF. Similar to the paste products, the metal detection of milk products also has the problem that the products themselves have conductivity, and the product types and packaging materials on the same production line are also different. Parmalat is a world-renowned milk producer and produces yogurt, cottage cheese, and dairy desserts. Parmalat refitted the production line at its Kendall plant and installed Safeline metal detectors to increase production capacity. Among the eight inspection machines installed, a stand-alone Signature 2 metal detector and a metal detection system with dual inspection heads were included. This dual head system can convert the test head according to the product is a plastic film or foil packaging, so that when the detection of different products, the conversion speed is increased, and the detection efficiency is improved.

This detector can maintain a high detection sensitivity in the production line, mainly due to several major design advantages, such as: enhanced anti-vibration (EVI) performance, through the advanced internal structure and coil system, can stabilize the vibration and reduce Unwanted signal interference; dynamic filtering and enhanced noise suppression (ENI) performance reduces electrical and electrical noise generated by air.

However, it should be noted that even if the latest and best metal detectors are installed, metal contamination cannot be 100% eliminated. If the detection accuracy is 1 mm, the detector cannot detect the 0.9 mm metal, and in this case it is necessary to add other measures. In the end-user company's production line, prevention is more important than correction or failure analysis. When users take measures to reduce metal contamination, establishing a strict control system (eg, HACCP) is the first and most important step. The so-called control point is the location where metal contamination can be detected on the product line, or where other quality problems arise. In addition to testing at these control points, other channels are also tested to reduce the risk of metal contamination. Since the process has a stirring process and the stirrer is made of metal, it is difficult to ensure that the metal particles are not mixed into the food.

Nestlé is the world's largest food company. Its 8,500 food, beverage and medical products use the Nestle brand. With different packaging and specifications, Nestle's products have reached more than 22,000 kinds. Nestlé in Heilongjiang Shuangcheng mainly produces baby rice flour, wheat flour, baby foods made of milk and instant whole milk powder. Twin Cities Nestlé has realized the seriousness of metal contamination in milk powder through the inspection and experience of the actual production site. It is required to install a safeline gravity feed metal detection system at the outlet of each finished product pipeline. It can detect a diameter of 1.0. Mm of iron. This effectively improves the safety of the product and also increases the production efficiency. Avoid disposing tons of powdered milk when you find that the stirrer is damaged.

Source: Export Goods Packaging