Injection molding method of plastic magnetic rotor
Plastic magnetic rotor is a magnetic component produced through injection molding process, which combines the characteristics of magnetic powder and plastic to manufacture magnetic components with complex shapes and high-precision requirements. During the injection molding process, magnetic powder is oriented and arranged under the action of a magnetic field to form the required magnetic properties. The injection molding method for plastic magnetic rotors usually includes the following steps:
1. Material configuration: Mix magnetic powder, resin, additives and other raw materials in a certain proportion to ensure the performance of the final product.
2. Mixing: Fully mix the magnetic powder with the binder for subsequent injection molding.
3. Granulation: Process the mixed magnetic powder and binder into granules suitable for use in injection molding machines.
4. Injection molding: Put the pellets into the injection molding machine and inject them into the mold cavity under high temperature and high pressure. During this process, the magnetic powder is oriented and arranged.
5. Orientation: During or after injection molding, magnetic field orientation is applied to the magnet to enhance the magnetic force in a specific direction.
6. Demagnetization: Remove residual magnetic fields to ensure product performance.
7. Magnetization: According to the requirements of the product, perform axial or radial magnetization to achieve the required magnetic properties.
8. Testing: Conduct size, appearance, magnetic properties, and other inspections on the finished product to ensure compliance with design requirements.
The injection molding method of plastic magnetic rotors has the advantages of high production efficiency, low cost, and the ability to produce magnetic parts with complex shapes. This technology is widely used in products such as motors, sensors, fans, etc.
The latest research shows that by using high-strength carbon fiber composite material rings to cover injection molded plastic magnets, structures that can withstand extremely high speeds can be achieved, which is particularly important for applications in aircraft and high-speed motors. In addition, the market size of the injection molding magnetic industry is expanding, and technological innovation and process improvement are key factors driving the development of the industry.
