Injection molded magnets can be of very simple shapes or very complex. All or only part of the device
may be magnetized. It is sometimes cost advantageous to make an entire part out of the magnet material and just magnetize the portion requiring magnetic output.
One of the more important developments in magnetic materials, polymer bonded magnets, have opened a new world of application opportunities. The processing temperatures employed to blend and mold the material mixture is low enough to allow many different magnet powders to be used alone or in combination in the polymer binder to achieve an unprecedented range of properties.
Another benefit of the injection molding process is that magnet material can be directly molded into, onto, or against other assembly components eliminating subsequent assembly steps. This is called insert injection molding.
Magnetic powders include ferrite, neodymium-iron-boron (NdFeB), and samarium cobalt (SmCo). There are several alloy compositions available of ferrite and NdFeB providing many different magnetic properties.
An important characteristic of injection molded magnets is that they conform dimensionally to the mold cavity which is precisely machined, the result being close tolerances in the finished product. What little dimensional variability there is results from shrinkage of the polymer during cooling. This depends upon part thickness and shape.
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Contact Name: Susan Chen
Company Name: Yuxiang Magnetic Materials Ind. Co., Ltd
Street Address: F/16, Jinyuan Plaza,
No.57 South Hubin Road, Xiamen, China
Member name: permanentmagnets
Member Since: 19 February 2009
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Business focus: Ferrite, Magnet, Flexible Magnets, Ndfeb Magnets, Alnico Magnets, Smco Magnets, Rubber Magnets, Refrigerator Magnet, Fridge Magnets, Magnetic Powder
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