Bonded NdFeB magnet is composed with compression NdFeB magnet, injection NdFeB magnet and flexible NdFeB magnet. Since its birth in the middle of 1980’s, the demand of bonded NdFeB magnet has been dramatically increasing for the industries of automatic control, automobile, 3C products (computer, communication & consumer electronics) and household electric appliance with virtues as follows:
- Offering new and cost-effective solutions for design and manufacture with availabilities of typical toughness of plastic, diverse and complex geometry, preferred magnetizing pattern, as well as more assembling methods.
- Extensive choice of property range 1.0—11.5 MGOe.
- Much better resistance of corrosion than sintered NdFeB magnet.
- Free-machining by direct molding with net shape and close-tolerance
- Minimizing figure and weight of application due to its comparatively stronger magnetic property and lower density.
Bonded magnet materials can be made from Ceramic, NdFeB, or SmCo powders which are combined with a variety of plastic binders (Matrix). They can be either Injection Molded or Compression Bonded into complex magnet shapes with finished dimensions. Bonded magnet materials have a moderate resistance to corrosion and a low tolerance to heat because of the binder material. Bonded magnet materials are commonly used in automotive parts because they lend themselves to large production quantities and complex shape can be produced at a low cost.
Injection molded magnets can be formed into complex shapes and be insert molded directly onto other components to produce assembly parts. Compression bonded magnetsoffer higher magnetic output than injection-molded magnets, but are limited to more simple geometries.
