2018年10月1日星期一

NdFeB Magnet Stripping Operation

NdFeB Magnet Stripping Operation
What is stripping operation?
For the manufacture process of NdFeB magnet, each step will produce a certain proportion of defective products. The coating process is also existing defective products, without exception. In order to recycle these defective magnets, the magnet manufacturers will strip the coating of defective magnets, then replating them. The simple stripping operation of NdFeB magnet can be divided into chemical stripping and physical stripping, and different types of coating have its own stripping operation solution.
To some degree, the stripping operation will affect the dimension and surface state of the magnet, and later influence its magnetic properties and uniformity.
Physical stripping of NdFeB magnet
Physical stripping of NdFeB magnet
Physical stripping of NdFeB magnet
The physical stripping generally means that stripping the coating from the surface of the magnet by the physical method.
For the softer coating, the manufacturer will utilize sandblasting operation to remove it. Compressed air will drive the abrasive particle to impact the surface of the magnet, and the surface will have enough cleanliness and roughness depend on the impact and cutting action of the abrasive particle.1
Both mechanical cutting and grinding process can be applied in the physical stripping of simple geometry shape NdFeB magnet. It should be noted that the direct machining will affect the dimensions of the magnet, and the feed rate must be closely controlled to avoid the embrittlement of magnet.
The difference of expansion character between coating and magnet is also used by magnet manufacturers to strip the coating. The repeated thermal shock treatment will cause the fatigue cracking. The abrasive paper is usually used for the stripping operation of complex shape magnet and halfway stripping magnet.
Stripping Operation of NdFeB Magnet
Stripping Operation of NdFeB Magnet
Chemical stripping of NdFeB magnet
Chemical stripping will utilize the chemical reaction to corrode or dissolve the coating of magnet.
The chemical stripping is suitable for small size magnet, and different coating also uses different stripping solution system. The most common coating methods for NdFeB magnet are Nickel-Copper-Nickel coating and Zinc coating. The chemical character of rare earth permanent magnet is more active than coating, hence the chemical reagent and complexing agent need to be introduced to stripping solution system.
Zinc is a kind of amphoteric metal, and it can be reacted under both acid and lye. The strong acid stripping operation is usually using the nitric acid solution to remove the coating at room temperature. The alkaline stripping solution includes sodium hydroxide/potassium hydroxide and sodium nitride, and the temperature of the solution is around 100 deg c.
The stripping process for Nickel-Copper-Nickel coating is much more complex than Zinc coating, especially the primer Nickel layer. The simple formulation of Nickel-Copper-Nickel coating stripping solution is cyanide solution.

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2018年9月29日星期六

What Is A Hollow Cup Magnet

What Is A Hollow Cup Magnet

What Is A Hollow Cup Magnet
The hollow cup magnet, which is often called the magnetic ring, why? Because the magnetic ring itself is a hollow product, if it is not hollow, it will not be called a magnetic ring, so it is also reasonable to name the hollow cup magnet as a magnetic ring.
In general, the ring-shaped thing is mostly hollow, and the magnetic ring is just one of them. Why is the magnetic ring hollow? This is to make use of the regular characteristics of the magnetic ring. The hollow core of the magnetic ring is mainly simple in use and convenient to use. The hollow magnetic core can better penetrate into each interference source line, wrap the interference source line, and the characteristics of the magnetic ring can also be relatively horizontal, greatly improving the magnetic ring. The effect.
Hollow Cup Magnet
Hollow Cup Magnet
Everyone knows that the magnetic ring is used to suppress the interference signal. In order to make the home appliance work better, and also to work, it is no longer annoying to disturb signal interference. Therefore, as long as there is interference, we all remember that with the magnetic ring, hollow magnetic ring is also very simple to use, directly into the interference source line can, and the price is very cheap. We often see office computers on the data line, will see there is a starting point, that is, the location of the magnetic ring, in the appearance can not see it, has been injected with plastic, plastic injection is to protect the magnetic ring collision This leads to fragility and can also prevent magnetic leakage.
This is the advantage of the hollow magnetic ring, but also its advantages, in order to make it play a better and better effect, you can add more magnetic rings on the same interference source line, the more the magnetic ring is added, the anti-jamming effect The better, the priority is to choose a magnetic ring with a large outside diameter, a long length, and a small inner hole, so that it contains more components, and naturally the impedance characteristics are also stronger!


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2018年9月27日星期四

Decrypt NdFeB Magnets

Decrypt NdFeB Magnets

Decrypt NdFeB Magnets – The formation of a magnetic field is a magnetic field generated by a molecular ring current of a magnetic substance, and the direction of movement of atoms or ions outside the nuclear electrons is random, so a large number of atom synthesis current is zero, no magnetic field, such as ferric chloride, iron sulfate, etc. The iron ions in the solution are not magnetic, so they will not be affected by the magnetic force. Therefore, iron ions do not attract iron ions under the action of a magnet.
Decrypt NdFeB Magnets
Decrypt NdFeB Magnets
Magnet magnetic drive centrifugal pump It is designed by applying modern magnetic mechanics principle. It uses the magnetic transmission of permanent magnet to realize the non-contact transfer of torque. It also drives the external rotor and the external permanent magnet. The magnet magnetic line is used to drive the magnetic flux through the isolation sleeve. The inner rotor is also an inner permanent magnet. Since the medium is enclosed in a static insulating sleeve, the leak-free pumping medium can be sealed, and the shaft seal of the mechanical transmission pump can be solved without leakage, thus achieving a completely sealed, leak-free and pollution-free new industrial magnetic force. The purpose of the pump.
For most people, in the new technology industry, the permanent magnet material NdFeB, which has been widely used, is still a very mysterious thing. So what exactly is NdFeB? NdFeB, as its name suggests, is a metal compound composed of elements such as yttrium, iron, boron and rare earth elements. It combines the advantages of some rare earth elements and iron foot elements. It is the first high-performance utility model free of cobalt. The material, NdFeB has the advantages of extremely high energy machines and coke particles, and high energy density. This is a NdFeB permanent magnet material, which has been widely used in modern industry and electronic information, and makes instrumentation and electricity. The miniaturization, lightweighting, and insurance of electric motors and other equipment have become possible.
The application of NdFeB magnets in maglev trains is a magnetic levitation high-speed train system using contactless electromagnetic suspension, guidance and drive systems. Its speed can reach over 500 kilometers per hour. It is the fastest ground passenger vehicle in the world today. It has the advantages of high speed, strong climbing ability, low noise when using low energy consumption, safety and comfort, no fuel, and less pollution. It achieves high-speed ground-free operation without contact with the ground and without fuel.

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Disc NdFeB Permanent Magnets

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Strong NdFeB Magnet Disc

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2018年9月25日星期二

Magnetic Perfume Cap

Magnetic Perfume Cap

About Magnetic Perfume Cap
The perfume is a mixture of essential oil, fixatives and solvents, used to give the human and living-spaces an agreeable scent. The manufacture process of perfume has been already formed during the time of Ancient Egypt, then the process has further improved by ancient Rome and Arabs. The manufacture process was introduced into the European in the 14th century, and France is still the trading and designing center of the perfume until today.development of the aesthetic standard magnetic perfume cap
development of the aesthetic standard magnetic perfume cap
With the development of the aesthetic standard, the perfume bottle is not only as the vessel of perfume, but also has formed an art. The perfume bottle has already become a carrier of fashion sense for the last 100 years.
The magnetic perfume cap was used in Bleu De Chanel by industry giant Channel in 2010, and similar design is still used now. The magnetic perfume cap greatly improved the comfort level of the perfume’s level.
The principle of magnetic perfume cap
The principle of magnetic perfume cap
The principle of magnetic perfume cap
The production process of magnetic perfume cap
The production process of magnetic perfume cap
The production process of magnetic perfume cap
The magnet in magnetic perfume cap
The magnet in magnetic perfume cap is sintered NdFeB magnet, and the annual usage of magnetic perfume cap magnet is very large. Many magnet manufacturers in Zhejiang Province and Guangdong Province convert these millions of magnets, and the market competition in this area is fierce. In such case, some magnet manufacturers were already applied the low-cost sintered NdFeB magnet and bonded magnet into the magnetic perfume bottle. For low-cost sintered NdFeB magnet, its lifetime and pull force will much lower than regular magnet.
In consideration of ergonomic design, the magnet will be magnetized into 4-pole. The 4-pole magnet will also provide enough pull force to avoid the fall off of magnetic perfume cap. For same magnet, the pull force of multi-pole one will be higher than simple axial-magnetized one, so the customer can find 8-pole and 16-pole magnet in low-cost sintered NdFeB magnet. The magnetizing process is the productivity limitation of the magnetic perfume cap magnet in past several years.
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