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NAME:Bonded Compression Molded NdFeB Magnets
Bonded Compression Molded NdFeB Magnets are made of the powerful Nd-Fe-B material mixed into an epoxy binder. The mix is approximately 97% magnet material to 3% epoxy. The manufacturing process involves combining Nd-Fe-B powder with an epoxy binder and compressing the mixture in a press and curing the part in an oven. Since the material is formed by compression bonding, the dimensions typically vary or better for a given run.

Bonded NdFeB Magnets material is isotropic, so it can be magnetized through any direction, including multi-polar arrangements. Because the material is in an epoxy binder, it can be machined on a mill or lathe. However, the material will not support a thread, so holes cannot be tapped. Bonded NdFeB Magnets material is often used to substantially reduce the size of designs that used ceramic magnet materials. Significant size reductions can be achieved because Bonded NdFeB Magnets material is approximately 3 times stronger than ceramic magnet material. In addition, since Bonded NdFeB Magnets material is isotropic, it can be magnetized multi-polar, such as a N-S-N-S pattern on the outer diameter of a ring.


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Generally, the bonded NdFeB magnet is produced by molding compression of the compound NdFeB alloy powder with epoxy resin, also it can be made by injection or extrusion from NdFeB alloy powder mixed with plastic. The characteristics are as follows:


1.Higher Magnet Property: the magnet property of bonded NdFeB magnet is between that of sintered NdFeB and ferrite, and with good consistency and stability.


2.Large Freeness of Product Shapes and High Precision of Dimension: the magnet shape and dimension are decided by the tooling, like ring, segment, block, etc., without further sintering and mechanical machining processes.


3.Good Corrosion Resistance: after electrodeposited or through other special treatments, it can be used under normal or unfavorable environment conditions for a long time.


4.Diverse magnetization: Multi-pole magnetization and screw angle magnetization are available, and the field distribution could be square, sinusoid and so on.


5.It has high production efficiency, suitable for mass production.The bonded NdFeB magnet is mainly used for all kinds of micro–miniature motors, such as spindle motor, stepping motor, synchronous motor, DC motor and brushless DC motor. It can replace sintered NdFeB magnet and ferrite, making motor assembling simpler and more reliable, reducing costs and improving efficiency.

 Magnetic and Physical Properties