Injection molded magnet, often refers specifically to isotropic injection Neodymium magnet, is a kind of composite material produced by mixing isotropic NdFeB powder with the thermoplastic binder and some additives which then allow the magnet to be injection molded just same as any other plastic material would be. For isotropic injection molded neodymium magnet, its magnetic properties are lower than compression molded Neodymium magnet owing to relatively lower filling ratio of isotropic NdFeB powder. The most frequently used thermoplastic binder includes PA12 (Nylon12), PA6 (Nylon6), and PPS, then their maximum operating temperature is 120, 150, 180 degrees Celsius, respectively. Injection molded magnet is praised for its superior dimensional accuracy and mechanical strength. In addition, it also well suited for mass production and integrated ability with other functional parts. Injection molded magnet is broadly applied to household appliances, office automation, consumer electronics, and automotive industry for a long time.
Manufacturing Process of Injection Molded Magnet
Magnetic Properties of Injection Molded Magnet
Grade | Remanence Br | Coercivity Hcb | Intrinsic Coercivity Hcj | Max. Energy Product (BH)max | Max. Operating Temperature Tw | Temp. Coefficient Of Br | Density ρ | ||||
mT | kGs | kA/m | kOe | kA/m | kOe | kJ/m3 | MGOe | ℃ | %/℃ | g/cm3 | |
BZ-3 | 340-450 | 3.5-4.5 | 200-280 | 2.5-3.5 | 400-600 | 5.0-8.0 | 20-28 | 2.5-3.5 | 120 | -0.11 | 4.5-5.0 |
BZ-4 | 400-500 | 4.0-5.0 | 240-320 | 3.0-4.0 | 560-720 | 7.0-9.0 | 32-48 | 4.0-6.0 | 120 | -0.11 | 4.5-5.0 |
BZ-5 | 450-550 | 4.5-5.5 | 304-360 | 3.8-4.5 | 640-800 | 8.0-10.0 | 36-44 | 4.5-5.5 | 120 | -0.11 | 4.5-5.1 |
BZ-6 | 500-600 | 5.0-6.0 | 328-384 | 4.1-4.8 | 640-800 | 8.0-10.0 | 44-52 | 5.5-6.5 | 120 | -0.11 | 4.7-5.2 |
BZ-7 | 550-650 | 5.5-6.5 | 344-400 | 4.3-5.0 | 640-800 | 8.0-10.0 | 52-60 | 6.5-7.5 | 120 | -0.12 | 4.7-5.3 |
BZ-5SR(PPS) | 450-550 | 4.5-5.5 | 320-400 | 4.0-5.0 | 880-1120 | 11.0-14.0 | 36-44 | 4.5-5.5 | 180 | -0.11 | 4.8-5.3 |
BZ-6SR(PPS) | 500-600 | 5.0-6.0 | 320-400 | 4.0-5.0 | 800-1120 | 11.0-14.0 | 44-52 | 5.5-6.5 | 180 | -0.11 | 4.9-5.4 |
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