The working principle of the metal separator and the metal detector is roughly the same, but the use of the two is not the same, the metal detector as the name suggests refers to the equipment that can detect various iron, stainless steel, copper, aluminum and other metal impurities in the product, used to ensure product quality and protect production equipment. The metal separator refers to the metal detection machine of the passage type, the fall type and the pipe type. Based on the function of the gold detector, it also has an automatic separation function, which can detect metal impurities at the same time, start the removal mechanism, and automatically remove metal impurities and contaminated products. Below, Shandong Gaohui Electromechanical Technology Co., Ltd. introduces the difference between the two!
Differences in shape classification:
The classification of metal separators is: channel-type, falling type and pipe type.
The classification of metal detection machines is:
1, divided by function:
1) All metal detector: can detect iron, stainless steel, copper, aluminum and other metals. The detection accuracy and sensitivity are relatively high, stable and reliable.
2) Iron metal detector: can only detect iron metal, commonly known as needle detector. The detection accuracy and sensitivity are low, and it is easy to interfere. Commonly referred to as "needle inspection machine" "needle inspection machine" "needle passing machine"
3) Aluminum foil metal detector: it can only detect ferrous metal, but when detecting products with aluminum foil packaging, its detection accuracy and sensitivity are still high. This product domestic Europe and the United States, Japan has, China has no mature products.
2, divided by use:
1) Underground metal detection machine.
2) Handheld metal detector.
3) Conveying metal detector.
4) Falling metal detector.
5) Pipe type metal detector.
6) Vacuum conveying metal detector.
7) Pressure conveying metal detector.
8) Flat metal detector.
Function classification difference:
The metal detector is used to detect metal foreign bodies mixed in the production process of food, medicine, cosmetics, textiles, etc. Metal detector is widely used in food, pharmaceutical, daily chemical and other processing and packaging industries, as a key control point of HACCP to help manufacturers carry out quality control to ensure that the final products entering the market will not cause physical harm to consumers.
Metal separator is to separate these metals, the general plastic production will use metal separator, the use of the benefit is to protect the production equipment, improve production efficiency and quality, improve the utilization of raw materials.
Function of metal detector:
1. Important Role in archaeology
Metal detectors can detect not only munitions, but also coins, keys and other metal objects. In battlefield archaeology, most of the evidence is metal, such as musket warheads, cartridges, bullets, cannons and shells, shrapnel and swords, depending on the historical period in which the battle took place. Therefore, the most important tool of the battlefield archaeologist is the simple metal detector.
2, textile (clothing, clothing, toys, shoe materials) inspection of broken needles special name: needle detector, needle detector
3, the detection of metal impurities in the food industry mainly uses metal detection machine, food metal detection machine is divided into two kinds: belt type and pipe type. The belt type is a conveyor belt, and the food is placed on the belt through the probe if it contains metal impurities, it will alarm to stop or eliminate. The pipe type is mainly free-fall type, the food falls freely, and the probe will alarm and then discharge.
How to separate plastics and metals:
1, metal trap
The pulverized waste is transported through a pipe, during which a metal trap is used to separate the metal debris with a diameter of 0.75 to 1.2MM.
2, electrostatic separator
The mixture is crushed and put into an electrostatic separator. Using the different charging characteristics of metal and plastic, copper, aluminum and other metals can be separated. This method is suitable for the treatment of metal-filled composite materials, cable materials and gold-plated plastics.
3, dissolution separation
The plastic coated metal part is immersed in a suspension containing methylene chloride, non-ionic surfactants, paraffin and water to dissolve and separate the plastic coating.
4, embrittlement separation
The mixed waste of metal and plastic is cooled to the embrittlement temperature of the plastic, and then crushed, and then the metal is separated from the plastic by the air sieve separation method.
5. Peeling of cable sheath
Wire, cable sheath materials are mainly polyvinyl chloride, polyethylene (including crosslinked polyethylene) and synthetic rubber and natural rubber, in addition to the above electrostatic separation method, there are two methods of dry method and temperature method can make plastic, rubber and copper, aluminum cores effectively separated.
(1) dry separation: the far-infrared device is used to heat the inside of the cable evenly, and then the skin is manually peeled.
(2) wet separation: the aluminum wire is impregnated in the impregnating agent (surfactant) solution, heated to 70-90 degrees after peeling off the skin, then, and then continuous cleaning with organic solvents several times, completely remove the tar.
Use of metal detector and metal separator:
The metal detector is used to detect metal impurities mixed in the production process of plastics, chemicals, food, medicine, cosmetics, textiles, etc.
The metal separator separates these metal impurities from the raw material or recycled material. It is mostly used in plastic recycled materials. Because plastic mouthpieces will be mixed with some metal fragments or particles after being processed by the crusher. Designed to prevent clogging in off-line production.
At present, gold detectors and metal separators are widely used in many industries, such as in the food industry, pharmaceutical industry and chemical industry, which have high health requirements, to ensure product quality and safety; Used in the plastics and recycling industries to protect expensive equipment from metal contamination and reduce downtime and defective products.
The above is the introduction of the difference between the metal separator and the metal detector. The metal detector can be used in the production line of the enterprise to detect the residual metal foreign matter in the raw material or finished product, including iron, copper, aluminum, stainless steel, lead, etc., which is widely used in food, medicine, toys and other industries. The use of metal detector can effectively help enterprises play a very important role in improving product quality and protecting downstream equipment, and can try to avoid unqualified products containing metal impurities entering the market. The metal separator has a strong ability to adapt to the environment, and can work at normal temperature, but also can be used normally in the environment of high humidity and cold storage. Due to the use of double signal detection, the detection sensitivity of iron and non-ferrous metals can be indicated respectively to achieve independent adjustment.