Injection molded magnets offer designers and engineers a material with nearly unlimited dimensional and magnetic possibilities. They are made by mixing magnetic materials (NdFeB, ferrite) with a polymer binder (usually nylon or PPS) which then allows the magnet to be injection molded just as any other plastic would be. In addition to providing maximum shape complexity, these magnets can be over-molded directly onto/around existing components like shafts or bushings, often eliminating the need for secondary gluing or assembly.
Injection molding allows for the production of intricately shaped magnets with extremely tight tolerances (up to .01mm) and a wide variety of physical and magnetic characteristics, depending on the type of magnetic material and binder utilized. Exceptional tensile strength provides high impact and rotational force resistance – and they have excellent chemical resistant properties as well.
Injection molded magnets are available in both neodymium and hard ferrite materials – and neodymium magnets made this way are also self- encapsulating, eliminating the need for additional corrosion resistant coatings or plating. It is also possible to utilize a range of blended hybrid materials to produce an incredibly wide range of potential energy products.
Injection molded magnets are the option our customers turn to most often to replace more traditional sintered or cast materials, allowing for local sourcing of magnets while streamlining the manufacturing process. EAM’s knowledgeable product development team can help you choose the optimal combination of binder and magnet material for your specific application.