Industrial Permanent Bonded Ferrite Magnets
Bonded ferrite is produced by mixing plastic matrix and ferrite oxides.
The production process of permanent bonded ferrite magnets has been known since the 50’s, mainly the injection molding and compression practice. The main advantage compared to the sintered ferrite is the wide variety of shapes, miniaturization possibilities, minimization or assembling process, robustness, tooling process.
The assembling process and miniaturization of devices using these kinds of magnets are optimized thanks to the over-moulding process. In this case, magnet post-processing is usually not necessary. Magnetization configurations can be optimized to the need of the final device application. Permanent bonded ferrite magnets have high resistance to oxidation and in general to chemical aggression.
The Production of Permanent Ferrite Magnets
Ferrite-rubber bonded magnets are produced by combining ferrite magnet powder and bonding synthetic rubber. They are very strong and have excellent flexibility which can be formed by extrusion molding into different shapes.
This makes bonded ferrite magnets particularly suited to application where the contact with liquid or aggressive environment is frequent. Thermal behavior is acceptable for many applications as its coercive force is not reduced up to maximum working temperature, 120 °C.
Permanent bonded ferrite magnets have the following applications:
- Motor magnets
- Magnetic rings for aerodynamic component
- Color television monitor
- Isotropic injection products
- Anisotropic injection products
MPI Magnets specialized in the production of permanent bonded ferrite magnets. With an experience of more than 30 years, we have successfully designed and manufactured a full range of top-quality products and distributed them around the world.