Anisotropic Injection Molded Magnets

Anisotropic Injection Molded Magnets, Injection Bonded Anisotropic NdFeB Magnet, Injection bonded ndfeb sensor magnets, anisotropic injection bonded ndfeb magnets

Anisotropic Injection Molded Magnets – The common molding technics of anisotropic ndfeb magnet are injection molding and compression molding. Two major application samples of anisotropic ndfeb magnet are sensor magnet and expansion valve.

Injection bonded ndfeb sensor magnets made by HDDR ndfeb powder are widely used for auto speedometer, speed sensor, water temperature sensor etc. The surface magnetic field can reach 3000GS upwards, needle axis remained in the body of ndfeb magnet when injection molded, which is in favor of forming the excellent maving balance.

Electric expansion valve adopts HDDR injection magnetic ring that made by anisotropic ndfeb powder features good properties 30%~60% higher than other expansion valves made by common anisotropic ndfeb ring, thus, it can highly advance energy-efficiency-rate of air conditioner, and promotes the development of frequency conversion air conditioner towards energy-saving and environment-protection.

Anisotropic Injection Molded Magnets

Anisotropic Injection Molded Magnets

About the Injection Molded Neodymium Magnets
Injection Molded Neodymium magnets are made by permanent magnetic powder, Neodymium powder, and thermoplastic matrix material (PA 6, PA 12, PPS). Magnetic material could directly insert in or against the shaft and other components, which eliminates the additional assembly process. In addition, the thermostability of this type magnet is affected by its binder. With the PPS type, the operating temperature could achieve as high as 180℃.

The advantages of injection molded magnet derive from the fact that it not only allows the thin-wall and intricate design, but also it can be designed in a multipolar or complex magnetization.
The manufacturing process of injection molding, connecting the magnetic material to shaft and other components directly, eliminates additional assembly process and saves the cost.

Conforming dimensionally to the mold cavity gives them the advantage of close tolerance, which is widely used in automatic equipment, stepping motors, Brushless motors, DC to DC Air conditioner motors, cooling fan motors, meters, automotive sensor, and high end household appliance.

Properties Unit AIMM-11 AIMM-13 AIMM-15 AIMM-17 AIMM-19 AIMM-21
Residual Induction Br T 0.65-0.7 0.7-0.75 0.75-0.83 0.88-0.93 0.95-1.0 1.0-1.05
kGs 6.5-7.0 7.0-7.5 7.5-8.3 8.8-9.3 9.5-10.0 10.0-10.5
Coercive Force Hcb kA/m 457-477 477-517 477-533 517-565 517-565 557-629
kOe 6.0-6.5 6.0-6.5 6.0-6.7 6.5-7.1 6.5-7.1 7.0-7.9
Intrinsic Coercive Force Hcj kA/m 875-1035 875-1035 875-1035 875-1035 875-1035 915-1035
kOe 11.0-13.0 11.0-13.0 11.0-13.0 11.0-13.0 11.0-13.0 11.5-13.0
Maximum Energy Product (BH)max kJ/m3 72-88 87-103.5 103.5-119 123-135 135-151 151-167
MGOe 11-13 11-13 13-15 15.5-17.0 17-19 19-21
Recoil Permeability μ 1.10-1.20 1.10-1.20 1.10-1.20 1.10-1.20 1.10-1.20 1.10-1.20
Temperature Coefficient of Br %/℃ -0.13 -0.13 -0.13 -0.12 -0.12 -0.12
Temperature Coefficient of Hcj %/℃ -0.5 -0.5 -0.5 -0.55 -0.55 -0.55
Forming Method Injection Molded Compression Molded