Basic use of needle detector / food metal detector knowledge
Simply speaking, when manufacturers produce clothing, sports shoes, plush toys, etc., the products must pass the needle detection of the needle detector before packaging. The working principle of the needle detector is: firstly, the upper and lower probes receive and process signals, and are sensed by strong magnetic field induction and photoelectricity scanning, and then have a strong electric integrated block, a sensitivity control integrated block, a signal receiving integrated block and a signal output integrated block. Complete the inspection work.
When the product passing through the needle detector has broken needles or substances such as iron metal, the needle detector is not allowed to pass. When the iron-containing metal is detected, the needle detector will automatically alarm and the conveyor belt will be reversed to discharge the goods. The original position; from the position of the inspector according to the broken needle signal indicator, can quickly find the location of the broken needle, and if the metal is not detected, it can pass through the needle detector channel. According to the regulations for the detection of broken needles in exporting textiles, the products that pass the needle inspection by needle detectors can be exported.
How food metal detectors work
The lens transmits infrared radiation to the infrared detector, and when the amount of radiation reaches the starting point, the electronic switch output line is triggered. The product is also specially designed with electronic compensation lines to compensate for changes in the high temperature environment and device aging, so no need to adjust, to ensure high security and reliability of operation. Three different temperature set points provide the best temperature impact.
The origin of food metal detectors
In the early period, if it was to be specific to that period, it was the 80s of the last century. When people wore clothes, they were often stabbed by "inexplicable" sharp objects. Such stabbing incidents were frequent. The occurrence has caused the Japanese government to pay enough attention, which makes the government specifically issue corresponding regulations to control the broken needle. Therefore, the origin of the original food metal detector was from Japan, and its principle is similar to that of metal detectors. Due to the strict control and restriction of it, the metal fittings such as the zipper zipper used in daily life must be 100% over-tested. That is to say, it must be verified by the metal detector to finally pass the production. of.
Food metal detector main application areas
1. Rolling mill: control shearing machine, monitor hot rod, control boring machine, coil adjustment, switch cross cutting crane, cold bed, coiling control, monitoring edge cleaning, continuous casting or tracking high speed coil.
2. Coke oven: Monitor quenching, shear reduction, and exhaust flame and conveyor in the furnace.
3. Forging casting: monitoring casting process, position control, waste incinerator, monitoring conveyor belt, blast furnace, waste monitoring, glass industry, monitoring casting mold.
4. Food Metal Detector General Industry: Any place where a reliable signal is required to use infrared radiation.
Food metal detector repairs internal noise caused by malfunction
The noise inside the needle detector comes from the noise or vibration generated by the needle detector itself.
First fix the mechanical bottom anchor bolts so that the rollers are off the ground.
If the ground bearing capacity is weak, it will cause mechanical vibration, which may cause malfunction. Please lay a 20cm square plate under the bottom bolt to reduce the consumption of the mechanical body.
How to make the food metal detector work the most
Food metal detectors and needle detectors are the testing equipment that must be used in export orders and play an important role in export orders. If you do not do well in this process, it will have a big negative reaction to labor-intensive enterprises that have already had very low profits.