Compression Molded Magnets

Compression molded magnets are consisting of isotropic NdFeB powder and thermosetting epoxy resin binder, then compound compression molded into the required geometry and thus cured at a specific temperature. Compression molded magnets need to be applied epoxy resin through electrophoresis or spraying technology to obtain superior corrosion resistance. It has higher magnetic performance due to the higher loading of magnetic powder. Unlike injection molded magnets, compression molded magnets are suitable those applications with relatively lower mechanical strength and uncomplicated shapes, especially thin-wall ring shape. As the most representative products, ring magnets can be magnetized to multipole, thus used by various kinds of micro motor.

Compression Molded Magnets

Manufacturing Process of Compression Molded Magnets

Compression Molded Magnets-Process

Magnetic Properties of Compression Molded 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
BN-2 300-400 3.0-4.0 240-320 3.0-4.0 480-640 6.0-8.0 24-32 3.0-4.0 160 -0.11 4.5-5.0
BN-4 400-500 4.0-5.0 240-320 3.0-4.0 560-720 7.0-9.0 32-48 4.0-6.0 160 -0.11 5.0-5.5
BN-6 500-600 5.0-6.0 320-400 4.0-5.0 560-720 7.0-9.0 48-60 6.0-7.5 160 -0.11 5.5-5.8
BN-8 600-680 6.0-6.8 360-440 4.5-5.5 640-800 8.0-10.0 60-72 7.5-9.0 160 -0.11 5.8-6.0
BN-8L 600-680 6.0-6.8 400-480 5.0-6.0 640-800 8.0-10.0 64-72 8.0-9.0 160 -0.11 5.8-6.1
BN-8H 600-660 6.0-6.6 400-480 5.0-6.0 1040-1360 13.0-17.0 64-72 8.0-9.0 180 -0.10 5.8-6.1
BN-8SR 600-680 6.0-6.8 400-480 5.0-6.0 800-1120 10.0-14.0 68-76 8.5-9.5 180 -0.10 5.8-6.1
BN-10 680-730 6.8-7.3 400-480 5.0-6.0 640-800 8.0-10.0 76-84 9.5-10.5 160 -0.10 5.8-6.1
BN-10H 700-750 7.0-7.5 440-520 5.5-6.5 720-800 9.0-10.0 80-88 10.0-11.0 160 -0.10 6.0-6.3
BN-12 720-770 7.2-7.7 440-520 5.5-6.5 720-800 9.0-10.0 88-96 11.0-12.0 160 -0.10 6.0-6.3
BN-12H 720-770 7.2-7.7 440-520 5.5-6.5 760-880 9.5-11.0 88-96 11.0-12.0 160 -0.10 6.1-6.4
BN-12L 760-810 7.6-8.1 400-480 5.0-6.0 480-640 6.0-8.0 88-96 11.0-12.0 150 -0.12 6.0-6.3
BN-13L 780-830 7.8-8.3 400-480 5.0-6.0 480-640 6.0-8.0 88-104 11.0-13.0 150 -0.12 6.1-6.4
  • 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.