What is injection molded magnet?

Injection magnet is a permanent magnet made by mixing magnetic powder flaw detection with binder and granulating through injection molding process, which is called injection magnet. Compared with other permanent magnet processing methods, injection molding has unique and irreplaceable advantages.

Basic principles of injection molding

Injection molding is a forming method of injection and rubber products, also known as injection molding, is the composition of polymer powder or granular materials into the material barrel of injection machine, plastic ndfeb magnetic suppliers through heating, narrow, cutting, mixing and transportation efficiency, make the material proportion and melting, then with the plunger pump or extruder screw to molten polymer melt pressure, The high-temperature solution is injected into the pre-closed ultra-low temperature mold core according to the nozzle and the spate system software of the mold shell, and finally cooled and formed. After opening the mold shell, the product with certain geometric shape and precision can be obtained.

Advantages of injection molding

First, as with plastics, injection molding can make magnets with more complex shapes. In addition, the injection molding process can choose "embedded molding", "multi-step", "multi-product workpiece molding" method to form the magnet and other parts in one, thus saving the cost of secondary production processing and manufacturing.

Injection molding technology can produce both anisotropic magnets and various magnets. All kinds of magnets must be added to the trend electromagnetic field when forming, so that magnetic particle flaw detection in the molten state of the polymer has a certain orientation, that is, to produce trend, and can complete the multipole magnetization. Injection molding processes promote good consistency in specifications and characteristics.

In the whole process of molding, raw materials in the strong injection working pressure for the largest concentration value of the mold shell die to carry out a thorough filling, coupled with raw materials with thermosetting binder, so that the magnet has been better physical and physical properties. Due to the high composition of polymer binder in injection magnet, the magnet itself has strong corrosion resistance, and generally does not need to carry out surface coating maintenance.

With its unique advantages, injection molded magnets are often used in: magneto stator of brushless DC motor with low output power, multipole magneto rotor of brushless DC motor and servo motor, magnetic drive system, vehicle and its industrial sensors and other commodities.