Bonded Magnets

Bonded Magnets, Bonded NdFeB, Isotropic Plastic Bonded Neodymium Magnets, Custom High Precision Bonding Neodymium Magnets, Polymer-bonded magnetic compounds, Polymer Bonded Rare-earth Magnets China Factory Supplier & Manufacturer

Bonded Magnets – Bonded NdFeB (Neodymium) Magnet is made by binding rapid-quenching neodymium (NdFeB) powder with a resin. This is then either compression moulded with epoxy or injection moulded with nylon. The resultant magnets have high dimensional accuracy, are less brittle than normal neodymium magnets but are also less powerful. Being less brittle, they can be more easily made into thin walled ring magnets.

Permanent magnets are fragile. Have you ever wonder there is a flexible permanent magnet? Try finding it in the following content.

 Compression Bonded NdFeB Magnets

Polymer Bonded Magnet By MPCO PDF

 Injection Molded NdFeB Magnets
Compression Bonded NdFeB Magnets Injection Molded NdFeB Magnets

What is bonded Neodymium Iron Boron (NdFeB) Magnet?

Bonded Neodymium Iron Boron (NdFeB) Magnet, a type of custom molded magnets, is made by binding neodymium (NdFeB) powder with a synthetic resin or polymer.

Bonded NdFeB Magnets

Bonded NdFeB Magnets

Injection Molded Magnets VS Compression Bonded Magnets

It can be manufactured in complex forms by means of pressing or extruding.

Bonded ndfeb magnets that are created through injection molding can be formed into complex shapes and also insert molded directly onto other components to produce assembly parts.

Injection bonded magnets can be made from NdFeB, Ferrite or a combination of the two.

Compression bonded neodymium magnets offer higher magnetic property (High energy product up to 12 MGOe) than injection-molded magnets (High energy product up to 6 MGOe), but are limited to more simple geometries.

Compression bonded magnets can be made from either NdFeB or SmCo powders, so it’s also called bonded rare earth magnets.

Bonded Neodymium Magnet Production Process

Injection Molded Magnet: Powder + Binder + Additive – Weighing – Mixing – Extruding Pelletizing – Injection Molding – Finishing – Coating – Magnetization

Compression Molded Magnet: Powder + Epoxy Resin – Weighing – Mixing & Granulation – Particles Adjusting – Compression Molding – Curing – Finishing – Coating – Magnetization

Bond Neo Magnet Grade

Many orders choose grades BNP-8 and BNP-10. You can find more information from our Bond Magnet Grade Page.

Surface Treatment

Although plastic bonded ndfeb magnets have a good corrosion resistance, we still advise to make a coating for them so that the durability is optimal. Epoxy is the most commonly used plating for bonded ndfeb magnet. You can find more information from our Magnet Coating Page.

Magnetization Direction

Due to the isotropy, the plastic bonded magnets can be magnetized in different directions. More complex directions are easy to realize. You can find more information from our Magnetization Direction Page.

Tolerance

There is no necessary for secondary operation in the production process. So the consistency of magnetic performance is good and tolerances are very tight.

Advantages

Relatively Powerful Magnetic force
Lower Temperature Resistance
Excellent Oxidation Resistance
Good Chemical Resistance
Extreme resistance to demagnetization
Multi-pole magnetization direction
Tight Tolerances Possible
Good Mechanical Strength

Application

Bonded magnets are mainly used on different motors and sensors, and you can think it is born for auto industry.

It also makes more application possibilities than sintered magnets. For example, the use of higher-density bonded neodymium magnets is helpful in achieving weight and volume reduction in permanent magnet motors, resulting in raw material cost savings.

stepper motors
actuators
magnetic bearings
steering control motors
magnetic clutch
peripheral motors
spindle motors
auto sensors
auto fan motors
vacuum cleaner motor
air conditioner motor
mobile vibration motor

Bonded VS Sintered Neodymium Magnets

The magnetic property of bonded neodymium magnets are weaker compared with sintered neodymium; nevertheless, bonded ndfeb magnets make up many insufficiencies of sintered magnet, such as

Precise size
Less brittle
Light weight
A molding assembly
More complex shapes
More choice of magnetized directions
Greater resistance against corrosion
So bonded neodymium magnet is a more flexible alternative to sintered neodymium magnet.

Neodymium Ring Bonded Magnets

Traditionally, to realize multi-pole requirement, the ring magnets used on motors are assembled by segment magnets.

But it is risky while spinning, the adhesive material is out of action. And it’s hard to control the component’s tolerance in the process of assembly. Also it’s not easy to keep magnetic properties’ consistency of all arc magnets.

A better solution is to make multi-poles on a ring magnet instead of segment formed ring.

Now we can provide multi-pole & radial ring sintered ndfeb magnet to meet this requirement. But the limiting factor for production is still a big problem and makes lots of customers seek help from other magnet materials.

Bonded magnet can be magnetized into complex patterns with multiple poles that sintered magnet can’t do. This makes multi-poles ring bonded neodymium magnet an ideal material for different types of motors and sensors.

MPCO provides high precise custom bonded NdFeB magnets according to the specific requirements of customers; PLEASE SEND EMAIL TO US, our professional engineer will work with you.

Multipole Ring Bonded Epoxy Resin Binder Magnet BNP-2

Multipole Ring Bonded Epoxy Resin Binder Magnet BNP-2

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BNP-11 Diametrically Magnetized Radial Ring Magnet For DC Motor

BNP-11 Diametrically Magnetized Radial Ring Magnet For DC Motor

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Air Cleaner Air Purifier Bonded Neodymium Hot Deformed Magnet

Air Cleaner Air Purifier Bonded Neodymium Hot Deformed Magnet

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Thin Thickness Compression Bonded Radial Ring Magnets

Thin Thickness Compression Bonded Radial Ring Magnets

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Hot-pressed Full-Density Isotropic Magnet Radial Ring

Hot-pressed Full-Density Isotropic Magnet Radial Ring

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16-poles Multipoles Injection Bonded NdFeB Motor Magnet

16-poles Multipoles Injection Bonded NdFeB Motor Magnet

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Fascia Massage Gun Bonded Neodymium Ring Magnet

Fascia Massage Gun Bonded Neodymium Ring Magnet

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Club Car Advanced Motor High Speed Magnet

Club Car Advanced Motor High Speed Magnet

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Bonded Ceramic Injection Magnet for High Speed Motor Sensor

Bonded Ceramic Injection Magnet for High Speed Motor Sensor

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Club Car IQ High Speed ADC Motor Injection Molding Magnet

Club Car IQ High Speed ADC Motor Injection Molding Magnet

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High Speed Motor Magnet for Club Car

High Speed Motor Magnet for Club Car DS Precedent IQ With ADC Motors

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High Speed AC Motor Ring Bonded Magnets

High Speed AC Motor Ring Bonded Magnets

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Compression Molded Hall Effect Sensor Magnets 64 Poles

Compression Molded Hall Effect Sensor Magnets 64 Poles

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88 Poles Multipolars Bonded Speed Sensor Magnets

88 Poles Multipolars Bonded Speed Sensor Magnets

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Ring Type Compression Molding Sensor Magnets

Ring Type Compression Molding Sensor Magnets

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Radiation Ring Oblique Magnetization Magnets 10 Pole

Radiation Ring Oblique Magnetization Magnets 10 Pole

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12 Poles Ring Radial Multipole Magnetization Magnet

12 Poles Ring Radial Multipole Magnetization Magnet

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Compression Bonded Magnets Ring-shape 16 Pole

Compression Bonded Magnets Ring-shape 16 Pole

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Bonded NdFeB Multipole Orientation Ring Magnets

Bonded NdFeB Multipole Orientation Ring Magnets

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Bonded Motor Magnet Multipole Magnetic Ring For Automotive Stepper Motor

Bonded Motor Magnet Multipole Magnetic Ring For Automotive Stepper Motor

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Bonded Multipole Orientation Magnets For Fan Motor

Bonded Multipole Orientation Magnets For Fan Motor

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Bonded Neodymium Rotor Magnet With Radial 4-pole For DCEC Cooling Fan

Bonded Neodymium Rotor Magnet With Radial 4-pole For DC/EC Cooling Fan

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PPS Resin Isotropy NdFeB Sensor Magnet for TMR Angle Sensors

PPS Resin Isotropy NdFeB Sensor Magnet for TMR Angle Sensors

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TMR Angle Sensor Magnets Round Isotropy NdFeB PA12

TMR Angle Sensor Magnets Round Isotropy NdFeB PA12

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10 Poles Inner Bonded NdFeB Magnetic Ring for Fan Motor

10 Poles Inner Bonded NdFeB Magnetic Ring for Fan Motor

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8 Poles Ring Shape Radial Internal Magnetization Magnet

8 Poles Ring Shape Radial Internal Magnetization Magnet

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Higher-Density Bonded NdFeB Motor Magnets

Higher-Density Bonded NdFeB Motor Magnets

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Arc Bonded Neodymium Motor Magnets

Arc Bonded Neodymium Motor Magnets

Arc Bonded Neodymium Motor Magnets, Plastic Injection Bonded Segment Neodymium Magnets for Motor, Compression Molding Bonded Neodymium Magnets for Stepper Motor Rotor Arc Bonded Neodymium Motor Magnets Features: Type: Permanent Name: Bonded NdFeB magnets Size: Customer’s Request Composite: Neodymium-iron-boron Coating: Ni,Zn,Golden,Black Epoxy Certification: ISO9001,ISO14001,TS16949 Shape: Block,disc,ring,arc,etc. Grade:BN3-BN12 Material: Neodymium-Iron-Boron Tolerance: ±0.01~0.05mm Application: Micro-miniature motors,IT products,office […]