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FEPLAST


Description
 
Composite material made up of a thermoplastic matrix and strontium-based hard ferrite powder.
The excellent rheological properties of Feplast enable complex shapes to be produced with the finest geometry.
The product is manufactured by injection under pressure. This technology enables potting and duel injection of plastic + plasto-magnet.
The injection process is well-suited to large and very large production runs.
Feplast is machinable.
 
Advantages
 
Possibility of producing complex shapes, making it possible to provide several functions with a single part:
- magnetic requirements,
- drive (gear, etc.)
- potted shafts,
- miscellaneous mounting components.
This means that additional assembly operations can be avoided, which makes the process more economical and more reliable. Furthermore, the process produces tight tolerances (from 0.1 to 0.01 mm)
 
Mechanical properties
 
Due to their plastic matrix, Feplast plastic magnets are more resistant to mechanical stresses than sintered hard ferrites, and most of all they are less friable. This material has a high tensile strength, which means that it behaves extremely well at high rotation speeds.
 
Chemical properties
 
Feplast has a low sensitivity to chemical aggressions.
It is totally insensitive to corrosion.
 
Magnetic properties
 
Due to the low density of these materials, their magnetic properties are not as good as those of sintered hard ferrites. However, anisotropic Feplast enables maximum BH values in excess of 15 kJ/m3 to be obtained. Furthermore, tight tolerances enable smaller air gaps to be obtained.
 
Isotropic Feplast
 
Material with no preferential magnetic orientation, which can therefore be magnetised in any direction (axial, radial and multipolar).
Tooling costs are lower than for anisotropic Feplast, but the maximum BH value is also  lower (max = 3 kJ/m3).
 
Anisotropic Feplast
 
Product with a higher specific energy, thanks to the orientation of the particles during injection.
The orientation is established according to the type of final magnetisation required. (radial, axial and multipolar).
 
Tooling costs are higher for this material than for an isotropic material, due to the orientation equipment required.
 
Prototypes
 
The validation of a magnet sometimes involves a prototype phase.
Arelec can carry out the design and manufacture or a prototype mould for a pattern, and supply prototype parts.
In certain cases, Arelec has standard machinable shapes for producing prototypes by machining.



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