Injection Molded Magnets

Injection molded magnets are a type of composite material which composed of magnetic powder and thermoplastic binder. Injection molded magnets can be divided to isotropic type and anisotropic type base on whether apply orientation field or not during the molding process. Magnetic properties of isotropic injection molded magnets are significantly lower than compression’s due the lower filling ratio of magnetic powder. Injection molded magnet also can be classified to injection molded NdFeB magnets, injection molded ferrite magnets, injection molded SmCo magnet, and injection molded SmFeN magnets according to the type of powder. The maximum operating temperature of PA12, PA, and PPS binder can reach 120, 150, and 180 degrees Celsius, respectively. Injection molded magnets are well adapted for mass production with higher dimensional accuracy, complex shape, superior mechanical strength, low weight, and integrated ability with other functional parts.

Injection Molded Magnets

Manufacturing Process of Injection Molded Magnets

Injection Molded Magnets-Process

Magnetic Properties of Injection Molded NdFeB Magnets

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-3 350-450 3.5-4.5 200-280 2.5-3.5 400-460 5.0-8.0 20-28 2.5-3.5 PA12: 120

PA6: 150

-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 -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 -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 -0.11 4.7-5.2
BZ-6 550-650 5.5-6.5 344-400 4.3-5.0 640-800 8.0-10.0 52-60 6.5-7.5 -0.11 4.7-5.3
BZ-5 (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 PPS: 180 -0.11 4.8-5.3
BZ-6 (PPS) 500-600 5.0-6.0 320-400 4.0-5.0 880-1120 11.0-14.0 44-52 5.5-6.5 PPS: 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.

Magnetic Properties of Injection Molded Ferrite Magnets

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-F1.5 220-240 2.2-2.4 160-167 2.00-2.10 231-240 2.90-3.00 11.6-12.4 1.45-1.55 PA12: 120

PA6: 150

-0.19 3.25
BZ-F1.9 270-290 2.7-2.9 180-186 2.25-2.33 216-228 2.70-2.85 14.8-15.6 1.85-1.95 -0.19 3.63
BZ-F2.0 280-290 2.8-2.9 184-200 2.30-2.50 216-246 2.70-3.10 15.6-16.4 1.95-2.05 -0.19 3.70
BZ-F2.1 280-290 2.8-2.9 190-204 2.38-2.55 216-249 2.80-3.12 16.4-17.2 2.05-2.15 -0.19 3.75
BZ-F1.7 (PPS) 250-260 2.5-2.6 167-175 2.10-2.20 208-216 2.60-2.70 13.6-14.0 1.70-1.75 PPS: 180 -0.19 3.65
  • 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.