What is a needle detector? The role of the needle detector

What is a needle detector? The role of the needle detector

Needle detector English name: needledetectors alias: needle detector, needle detector is a ferromagnetic metal induction instrument, is a metal detector classification and application of the textile industry. Mainly used for the detection of textile ferromagnetic metal foreign bodies. Therefore, the purpose of the development of metal detectors is to detect broken needles in textiles, hence the name: needle detector! [Resume] In the 1970s, there was a textile needle break in Japan that caused children to be injured and killed, so the Japanese legislation The Needle Method stipulates that all textiles and all wearing items that come into contact with human skin must be tested for sharp metal foreign objects before entering the retail chain. Since the starting point of the needle detection method is caused by broken needles, this method pays special attention to broken needles, and non-ferromagnetic metal jewelry such as copper and aluminum is not included in the scope of broken needle detection.

Three categories: 1. Conveying needle detector 2. Platform needle detector 3. Handheld needle detector

The application of the needle detector in the knitted fabric finishing project plays an important role in improving the safety of knitted underwear. This paper introduces the role of the needle detector in the knitting finishing project; the precautions in use and the problems frequently encountered in the use of the needle detector are discussed in the maintenance technology, and an effective solution is proposed.

The traditional knitwear finishing project only includes four processes of finishing, inspection, folding and packaging. The content is mainly to meet the specified finished product style and specification size; correct the defects occurred in the pre-process, and carry out the necessary inspection and experiment on the finished product, according to The finished product quality is graded; the finishing machinery suitable for the finished fabric is correctly used; the necessary product instructions are added according to the properties of the raw materials; various kinds of liner packaging are applied to the finished product, so that the finished knitwear is finished by finishing the appearance. It is flat and beautiful to meet the various requirements of consumption, transportation and sales.

However, with the continuous improvement of the people's level and the stricter requirements on the quality of knitted fabrics, safety has become the goal pursued by the modern people, especially the knitted underwear is directly in contact with the skin, and the safety requirements are higher. It is easy to have foreign matter such as broken needles mixed into the knitted fabric, causing unsafe factors. Nowadays, knitted fabrics exported to Japan, the United States and other developed countries must go through the needle inspection machine before they can enter their national export sales. This has formed a new concept of knitting finishing engineering: ironing, inspection, folding, needle testing, packaging 5 The process is gone. This paper mainly discusses the application of needle detector in knitwear finishing project.

The needle detector is mainly used to check whether iron filings such as needles are mixed into the product and whether the product is put into inspection. While checking whether the product has iron filings, it is also possible to accurately record the quantity of the product. The detection principle is to work instantly on the cutting of the optical inductor. The optical inductance is mounted on the two sides of the conveyor belt, and the height is about 8mm. If the product is lower than the position of the optical inductor, the thin product is in the optical inductor beam. The following is passed, the machine does not think that there is a product to pass, the needle-injection operation can not be carried out, even if iron scraps with a thickness of about 5 mm are placed on the conveyor belt, the machine can not be inspected, and the product has a certain thickness, the iron filings Wherever the position is, the optical inductance can inspect the product and the needle-punching operation can be performed.