Injection Molded Magnet

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.

Injection Molded Magnet

Manufacturing Process of Injection Molded Magnet

Injection molded magnet manufacturing process

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
  • The above-mentioned data of magnetic properties and physical properties are given at room temperature.
  • The max working temperature of magnet is changeable due to length-diameter ratio, coating thickness and other environment factors.