Generally, employees of NdFeB magnet manufacturers are most exposed to sintered NdFeB magnets, that is, sintered magnets. According to different production processes, there is also injection molded NdFeB magnets in the NdFeB product classification, so injection molded magnets and sintered magnets What are the differences? The editor will take you through it below.
Comparison between injection molded magnets and sintered magnets:
1. Production process
1) Injection molding permanent magnet: The process is simple and can be injection molded together with various metal and non-metal inserts, and multiple composite moldings can be performed.
2) Sintered permanent magnet: The process flow is more complicated, and assembly with other metal inserts requires additional processing.
2. Magnetic properties
1) Injection molded permanent magnet: high surface magnetic field performance.
2) Sintered permanent magnet: The surface magnetic field performance is very high.
3. Reliability
1) Injection molded permanent magnet: The product has high toughness, strong mechanical properties, and is not easy to break and chip.
2) Sintered permanent magnet: The product has high strength, but is brittle and easy to break, chip, and collapse.
4. Dimensional accuracy
1) Injection molding permanent magnet: Adopting injection molding method, it has high precision, good product consistency and high operating balance.
2) Sintered permanent magnets: Using the sintering molding method, the product accuracy is poor. When assembled with other inserts, the product operation balance is not high.
5. Multipolarization
1) Injection molding permanent magnet: it can be molded into any multi-polar product at one time without reducing the surface magnetism.
2) Sintered permanent magnet: The coil magnetization method is used, the process is complicated, the more poles the higher the cost, the accuracy is poor, and the magnetism is difficult to control.