1. Differences in production processes:
Injection molded NdFeB permanent magnets: The process is simple, and various metal and non-metal inserts can be injection molded, and multiple composite molding can be performed.
Sintered NdFeB permanent magnets: The process is more complicated, and assembly with other metal inserts requires additional processes.
2. Magnetic differences
Injection molded NdFeB permanent magnets: The surface magnetic field performance is high, generally not exceeding 3000 Gauss. Sintered NdFeB permanent magnets: The surface magnetic field performance is very high, and a single magnet can reach more than 5000 Gauss.
3. Reliability
Injection molded NdFeB magnets: The product has high toughness, strong mechanical properties, and is not easy to break and fragment.
Sintered NdFeB: The product has high strength, but is brittle and easy to break, fragment and shatter.
4. Dimensional accuracy
Injection molded Ndfeb permanent magnet: Injection molding method, high precision, good product consistency, and high operating balance. Sintered NdFeB permanent magnet: Sintering molding method, poor product precision, assembled with other inserts, the product operating balance is not high.
5. Difficulty of multi-pole magnetization
Injection molded NdFeB can be formed into multi-pole products at will without reducing the surface magnetism. Sintered NdFeB permanent magnets use coil magnetization method, which has a complex process. The more poles, the higher the cost, poor precision, and difficult to control magnetism.
6. Temperature resistance (working temperature)
Injection molded NdFeB generally has low temperature resistance, but by selecting different plastic substrates (such as PPS), its temperature resistance can be improved, and the maximum temperature resistance is about 180℃.
Sintered NdFeB can withstand temperatures of 200℃ or even higher by selecting high temperature resistant grades.
7. Different application fields
Injection molded NdFeB is suitable for fields with complex shapes and high precision requirements, such as sensors, magnetic encoders, micro motors, etc.
Sintered NdFeB has high magnetic properties, so it is widely used in high-performance motors, wind turbines, hybrid vehicles, medical equipment and other applications that require high magnetic force.
