hot sale large injection plastic bonded magnet

hot sale large injection plastic bonded magnet

Plastic bonded magnet materials can be created through injection molded, being made from ndfeb, strontium ferrite or a combination of the two. 

Injection molding plastic bonded magnet can be molded into complex shapes, but also molded directly onto components. 

Plastic bonded magnet can also be created through the process of compression bonding which offer higher magnetic output but are limited to simpler geometries than injection molded plastic bonded magnet materials. 

Compression plastic bonded magnet are often made from either ndfeb or SmCo powders.

Injection molded plastic bonded magnet:

• Binder Types / Nylon / PPS / Polyamide.

• Temperature Range -40c – 180c
• Very Tight tolerances off tool ( 0.002 -0.003 Typical )
• Very good mechanical strength

Compression plastic bonded magnet:

• Higher Magnetic Strength due to higher magnetic particle density.
• Epoxy Binder / Resistant to normal industrial solvents and automotive fluids
• Epoxy Coat after manufacturing to prevent oxidation
• Temperature Range -40c – 165c
• “Tight” tolerances off tool
• Good mechanical strength

Typical plastic bonded magnet applications:

• Sensors
• Brushless DC Motors
• Audio-visual Equipment
• office automation
• magnetic therapy

General plastic bonded magnet advantages:

• Materials are isotropic and can be magnetized in any direction
• Wide range of existing tool sizes are available in rings, discs and rectangles
• Exsisting Multipole magnetizing fixtures for quick prototyping
• Easily machined
• Existing Multipole rings simplify assembly verse arc sepments

Properties of plastic bonded magnet:

	BNP-3	BNP-6	BNP-8	BNP-8SR	BNP-9H	BNP-10	BNP-11	BNP-12L
Br (mT)	450-510	590-650	620-670	620-660	650-700	680-720	700-740	730-770
Br (Gs)	4500-5100	5900-6500	6200-6700	6200-6600	6500-4000	6800-7200	7000-7400	7300-7700
Hcb（kA/m)	199-263	302-374	390-454	405-470	421-484	413-477	430-493	366-430
Hcb  kOe)	2.5-3.3	3.8-4.7	4.9-5.7	5.1-5.9	5.3-6.1	5.2-6.0	5.4-6.2	4.6-5.4
Hcj  (kA/m)	477-597	597-796	636-796	955-1114	915-1034	636-796	636-796	517-637
Hcj  (kOe)	6.0-7.5	7.5-10.0	8.0-10.0	12.0-14.0	11.5-13.0	8.0-10.0	8.0-10.0	6.5-8.0
(BH) max (kJ/m³)	24-32	44-53.6	60-68	65.6-72	72-80	76-84	80-88	84-92
(BH)max (MGOe)	3.0-4.0	5.5-7.0	8.0-9.5	8.2-9.0	9.0-10.0	9.5-10.5	10.0-11.0	10.5-11.5
Tw/ ℃	120	120	120	160	160	120	120	110

Picture of plastic bonded magnet

Production processing:

demagnetizing curve:

BN8

BN8SR

BN9H

BN10

BN12L

BNI6SR

Widely applications of bonded ndfeb magnet: stepper motors, brushless motors, DC motors, starter motor, DVD spindle motor, CD-ROM drive.

Bonded ndfeb magnets are mainly for the motor.

Motor manufacturers generally use bonded ndfeb magnet for motor, because of low assembly labor costs

Sintered magnet arc are often assembled piece by piece, glued to the rotor or stator

While, for boned ndfeb magnet, workers just only set bonded ndfeb magnet into rotor or stator after adhesive bonding.

So there is no high requirement of power, not only require great speed, then the motor manufacturers will use bonded ndfeb magnet for the high speed motor. 

Magnetizing method

Skrew-45°,8 Poles on OD, or oblique magnetized bonded ndfeb magnet

radial 2 poles magnetized bonded ndfeb magnet

radial 6 poles magnetized bonded ndfeb magnet

radial 12 poles magnetized bonded ndfeb magnet

radial 16 poles magnetized bonded ndfeb magnet

radial 24 poles magnetized bonded ndfeb magnet

radial multi poles magnetized bonded ndfeb magnet

radiant magnetized bonded ndfeb magnet

axial magnetizing bonded ndfeb magnet

Our plastic bonded magnet are certificated by CE, Rosh....

We would love to see how you have used our plastic bonded magnet.

Simply send us a photo of your plastic bonded magnet in use and if we use it on our website we will return you $10 next order (Amount more than $1000).

WARNING: Persons who are pregnant, wearing pacemakers, pacemaker defibrillators, insulin pumps, or electric insulin devices, should not use magnetic products.

speaker magnet

Speaker Magnets

Every audio speaker has a magnet in it. From subwoofers to iPod headphones, magnets provide the motive force that makes speakers move.

Although neodymium magnets were expensive, they allowed loudspeaker motors to be as little as half the weight of comparable ceramic magnet motors.

Prices of neodymium started coming down and interest in lighter weight speakers grew, as did neodymium speaker options.

speaker neodymium magnets:

arc neodymium speaker magnets:

ring neodymium speaker magnets:

pot magnet speaker driver magnets:

ferrite ring speaker magnets:

ferrite arc speaker magnets:

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Introduction of Great Magtech:

Advantages of GME speaker magnets

1. High Grade / High performance:

GME highest grade: N54, 52M, 50H, 48SH, 42UH, 38EH, 33AH, etc.

2. High Consistency: 

The Cpk of Remanence (Br) and Intrinsic Coercive Force (Hcj) are much higher than 1.67. 

The consistency of the surface magnetic field and magnetic flux can be controlled at +/-1%.

3. High Working Temperature:

GME ndfeb magnet can satisfy the working temperature requirements with excellent temperature resistance. 

The AH series with 40 kOe super-high coercive force can replace Smco magnets in most applications.

4. Low Weight loss:

GME super-high ndfeb magnet have a long lifetime with the following specifications; PCT: 130C，

humidity 100%，vapor pressure 2.7bar, 20days，average low weight loss <2 mg/cm².

5. High anti-corrosion:

 coating Nickel-Copper-Epoxy is typically more than 1000 hours.

strong speaker magnet Manufacturing Processes:

strong speaker magnet main manfucturing equipments:

How we test our strong speaker magnet:

How we pack strong speaker magnet:

We would love to see how you have used our magnets

Simply send us a photo of your magnets in use and if we use it on our website we will return you $10 next order (Amount more than $1000).

Keep magnets away from kids and animals.

VCM Magnets

neodymium (rare earth) magnets are widely used for motors, one of them is voice coil motors, especially in disk voice coil motors.

Voice Coil Motors (VCM), also called Voice Coil Actuators (VCA), are a very mature design that utilizes a magnet and yoke in conjunction with a coil. 

The coil and magnet area concentric about a common axis and there exists an engineered magnetic return path.

The coil is typically connected to a mechanism which translates the coil’s linear motion into a beneficial action. 

For example, a conventional loud-speaker uses a voice coil motor to drive a cone which converts the coil’s oscillating motion into sound energy.

VCM Magnets

Key Benefits of a VCM – Voice Coil Actuator:

• No commutation required
• Low to no hysteresis
• Zero cogging
• Fewer mechanical components compared to “screw-type” actuators
• Linear control characteristics
• High power to mass ratio
• High power to volume ratio
• Infinite position (Limited only by the encoder device.)
• High acceleration

Similar Products / Design:

• Moving Magnet  – Voice Coil Motor
• Rotary – Voice Coil Motor

Example Applications:

• Shakers – Vibrators
• Lens focusing
• Servo valves
• Positioning Stages
• Speakers

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Introduction of Great Magtechc Electric:

Advantages of GME arc electromagnet

1. High Grade / High performance:

GME highest grade: N54, 52M, 50H, 48SH, 42UH, 38EH, 33AH, etc.

2. High Consistency: 

The Cpk of Remanence (Br) and Intrinsic Coercive Force (Hcj) are much higher than 1.67. The consistency of 

the surface magnetic field and magnetic flux can be controlled at +/-1%.

3. High Working Temperature:

GME arc electromagnet can satisfy the working temperature requirements with excellent temperature resistance.

The AH series with 40 kOe super-high coercive force can replace Smco magnets in most applications.

4. Low Weight loss:

GME super-high arc electromagnet have a long lifetime with the following specifications; PCT: 130C，humidity 100%，

vapor pressure 2.7bar, 20days，average low weight loss <2 mg/cm².

5. High anti-corrosion:

 coating Nickel-Copper-Epoxy is typically more than 1000 hours.

VCM Magnets Manufacturing Processes:

VCM Magnets main manfucturing equipments:

How we test our VCM Magnets:

How we pack strong VCM Magnetst

Our VCM Magnets are certificated by CE, Rosh....

We would love to see how you have used our arc neodymium magnets

Simply send us a photo of your arc neodymium magnets in use and if we use it on our website we will return you $10 next order (Amount more than $1000).

WARNING: Persons who are pregnant, wearing pacemakers, pacemaker defibrillators, insulin pumps, or electric insulin devices, should not use magnetic products.