BONDED MAGNETS, Polymer bonded permanent magnet, Injection Molded Magnets, Compression Bonding Neodymium Magnets, Compression Bonded Magnets, Injection Molding NdFeB or Ferrite (Ceramic) Magnets
Bonded magnets are one of the most important magnetic materials. It opened a new world of application possibilities. Thermo-elastomer and thermo-plastic resins can be blended together with a variety of magnetic powders to form injection molded, compression and flexible magnets.
Injection molded magnets can be formed into complex shapes and be insert molded directly onto other components to produce assembly parts. Compression bonding magnets offer higher magnetic output than injection-molded magnets, but are limited to more simple geometries.
Injection Molded Magnets
– Bonded Ferrite
– Bonded NdFeB
Compression Bonded Magnets
– Bonded NdFeB
– Bonded SmCo
What is Bonded Magnet Anyway?
• Bonded magnet are composites of a permanent magnetic powder(s) embedded in a non‐magnetic matrix.
• The matrix is typically a thermoplastic or elastomeric binder.
• Common processing techniques are extrusion, injection molding, compression bonding, and calendering.
• Exhibit excellent mechanical properties compared to fully dense rare earth and ferrite magnets.
• End product has good finish and dimensional tolerances requiring no finishing operations.
• Injection molded magnets can be formed into complex shapes and be insert or over molded directly onto other components to produce assemblies.
• The non‐magnetic binder lowers the density of the magnet and dilutes the contribution of the magnetic powder.
• They generate less magnetic output per unit volume than fully dense magnets.
• The two most common magnetic powders are isotropic NdFeB and hard ferrite.
What’s New in Bonded Magnet?
• Rare Earth‐Free Fe16N2 based magnets.
• Application of 3D Printing/Additive Manufacturing to Bonded Magnets and Assemblies.
• Higher Energy Product Compression Bonded Isotropic NdFeB magnets.
Compression Bonding or Injection Molding?
• Complex forms with good geometrical tolerances
• Multi‐cavity tooling
• Over and insert molding
• Expensive tooling
• Lower magnetics (66% volume loading of magnetic powder)
• NdFeB and ferrite
• Thin walled large L/D ratio rings
• Simple low cost tooling
• Higher magnetics (75% volume loading of magnetic powder)
• Simple geometries
• Value added operations during pressing very difficult
• NdFeB only
No products were found matching your selection.