Bonded Molding Magnet, Plastic-bonded NdFeB-magnets, Bonded NdFeB Magnets and Assemblies, NdFeB magnet – bonded, pressed

Plastic-bonded NdFeB-magnets are formed into tools by means of compressing a mixture made of NdFeB-powder and synthetic resin. Bonded pressed magnets are able to fabricate in complex shapes. The magnetic values of bonded pressed magnets are higher than injected moulded magnets, due to their high density level. These magnets achieve highest form tolerances, making a further shaping process unnecessary. During manufacturing, general tolerance levels are kept to ±0.1 mm. The bonded NdFeB-magnets themselves have a relatively high corrosive resistance to environmental influences. Due to the high content of NdFeB powder, an epoxy coating is recommended.

Injection Molded/Bonded Magnets

MPCO is an industry leader in the design and production of injection molded magnets. These unique magnets are made by mixing magnetic material with a polymer binder (usually nylon or PPS) which then allows the magnet to be injection molded just as any other plastic would be.

Injection molding allows the production of intricately shaped magnets with extremely tight tolerances and a wide variety of physical and magnetic characteristics.

A wide range of properties are possible depending on the type of magnetic material and binder utilized. EAM offers both Neodymium and Hard Ferrite injection molding capability, and it is also possible to utilize a blend of different magnetic material to produce the desired properties.

MPCO knowledgeable product development team will assist you in choosing the optimal combination of binder and magnet material for your specific application.

Bonded Molding Magnet

Bonded Molding Magnet

One of the greatest advantages of the injection molding process is that a high degree of shape complexity is possible — ie. gears, snap fits and undercuts. It is also possible to incorporate shafts, brushes and other inserts into the process, simplifying the magnetic assembly manufacturing process. Injection molded magnets can be insert molded directly onto or around existing components, often eliminating the need for additional steps in the manufacturing process.

INJECTION MOLDED MAGNETS

Injection molded magnets are available using ferrite, neodymium-iron-boron, or blends of magnetic materials to achieve an extensive range of properties. Binder types include Nylon 6 and 12, PPS, and Polyamide. The binders and magnetic alloys are capable of a wide range of application temperatures from below -40°C to above 180°C. The Injection molding process is particularly well suited to molding very intricate shapes and thin walled parts. The finished parts can be either very simple or complex in geometry.

Magnetic materials can be insert injection molded directly inside or against an existing component to produce assembly pieces. Injection molded magnets dimensionally conform to mold cavities, which are precisely machined, resulting in finished products which usually do not require further finishing operations. This eliminates subsequent operations and reduces total cost.

Typical Applications
Bonded NdFeb magnets are usually used as a micro-motor stator or rotor it’s magnetized and interacts with the winding coil to form a driving unit.Digital cameras in consumer electronics, camcorders;TV, DVD player, computer, server;Office automation printing, duplicator;No-box refrigerators, air conditioners, microwave ovens, coffee machines, hair dryers, etc.Base station with 5G communication;A fascial gun for exercise and fitness;Dental washers, disinfectant sprays and surgical saws for medical equipment;Automobile seats, sunroof, steering system, tail box, rearview mirror storage and other aspects have been widely used, especially in the national promotion of energy saving, fast and efficient today, brushless DC motor and its core parts (bonded Neodymium iron boron magnet) more indispensable change.

Bonded Permanent Alternator Motorcycle Rotor Magnet

Step Motor Bonded Inject Molding Neo Magnet Ring Magnetic Assembily

Injection Ring Bonded Ferrite Magnet

Bonded NdFeB Injection Magnets for Synchronous Motor

Hot Pressed Injection Bonded SmCo Magnets

Epoxy Polymer Bonded Samarium Cobalt Rare Earth Magnets

Technical Specifications
MAGNETIC AND PHYSICAL PROPERTIES OF INJECTION & BONDED MOLDING NdFeB MAGNET

Grade Injection Molding Magnet   Bonded Molding Magnet
HMG-

2

HMG-

3

HMG-

4

HMG-

5

HMG-

6

HMG-

7

HMG-

2

HMG-

3

HMG-

4

HMG-

6

HMG-

7B

HMG-

8L

HMG-

8H

HMG-

8HD

HMG-

10A

HMG-

10L

HMG-

10H

HMG-

11L

HMG-

11H

HMG-

12H

HMG-

12L

HMG-

13L

Br    (KGS) 3.0-4.0 3.5-4.5 4.5-5.0 4.5~5.5 5.0-6.0 5.3-6.2 3.0-4.0 3.5-4.5 4.5-5.0 5.0-6.0 6.0-6.5 6.3-6.7 6.2-6.8 6.2-6.6 6.5-7.2 7.0-7.5 6.5-7.0 7.0-7.5 6.5-7.2 7.2-7.85 7.2-7.85 7.8-8.3
Residual lnduction  (T) 0.3-0.4 0.35-0.45 0.45-0.5 0.45-0.55 0.5-0.6 0.53-0.62 0.3-0.4 0.35-0.45 0.45-0.5 0.5-0.6 0.60-0.65 0.63-0.67 0.62-0.68 0.62-0.66 0.65-0.72 0.7-0.75 0.65-0.70 0.70-0.75 0.65-0.72 0.72-0.785 0.72-0.785 0.78-0.83
Hcb       (kOe) 2.4-3.2 2.8-3.2 3.0-4.0 3.5-4.5 4.0-4.5 4.3-5.2 2.4-3.2 2.8-3.2 3.0-4.0 4.0-4.5 4.2-5.0 4.8-5.6 5.5-6.5 5.0-6.0 5.3-6.0 5.0-5.5 5.5-5.8 5.0-5.5 5.3-6.0 5.0-6.0 5.0-6.0 5.0-6.0
Coercive Force     (kA/m) 192-256 224-256 240-320 280-360 320-360 344-416 192-256 224-256 240-320 320-360 336-400 384-448 440-520 400-480 424-480 400-440 440-464 400-440 424-480 400-480 400-480 400-480
Hci      (kOe) 6.0-8.0 6.0-8.0 7.0-9.0 7.0-9.0 7.0-9.0 6.5-11 6.0-8.0 6.0-8.0 7.0-9.0 7.0-9.0 8.0-10.0 8.0-10.0 12.0-16.0 11.0-14.0 8.0-10.0 6.5-8.0 9.0-11.5 6.5-8.0 8.5-10.0 8.0-10.0 6.5-8.0 6.0-8.0
Intrinsic Coercive Force(kA/m) 480-640 480-640 560-720 560-720 560-720 520-880 480-640 480-640 560-720 560-720 640-800 640-800 960-1280 880-1120 640-800 520-640 720-920 520-640 680-800 640-800 520-640 480-640
(BH)max  (MGOe) 2.0-3.0 2.5-3.5 4.0-5.5 4.5~5.5 6.0-7.0 6.0-7.5 2.0-3.0 2.5-3.5 4.0-5.5 6.0-7.0 7.0-8.0 8.0-9.0 8.0-9.0 8.0-9.0 9.0-10.0 9.5-10.5 9.0-10.0 10.0-11.0 9.7-11.0 10.0-12.0 10.0-12.0 11.0-13.0
Max.Energy Product (kJ/m³) 16-24 20-28 32-44 36~44 48-56 48-60 16-24 20-28 32-44 48-56 56-64 64-72 64-72 64-72 72-80 76-84 72-80 80-88 77.6-88 80-96 80-96 88-104
μRecoll (μH/m)
Permeabilily
1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2
Temperature
Coefficient of B(%/℃)
-0.11 -0.11 -0.11 -0.11 -0.11 -0.11 -0.11 -0.11 -0.11 -0.11 -0.11 -0.12 -0.08 -0.08 -0.11 -0.11 -0.10 -0.12 -0.10 -0.10 -0.12 -0.12
 Curie Temperature(℃) 350 320 320 320 320 350 350 320 350 350 350 350 350 350 350 350 350 320 320 320 320 320
Baturation(kA/m)
Magnetizing Force(kOe)
>1600 >1592 >1592 >1592 >1592 >1592 >1600 >1592 >1600 >1600 >1600 >2400 >2400 >2400 >1600 >1600 >1600 >1600 >1600 >1600 >1600 >1600
>20 >20 >20 >20 >20 >20 >20 >20 >20 >20 >20 >30 >31 >31 >20 >20 >20 >20 >20 >20 >20 >20
Max.Operating Temperature(℃) 160 160 160 160 160 160 160 160 160 160 160 160 160 180 160 160 160 160 160 160 150 150
Density           (g/cm³) 4.0-4.5 4.0-4.5 3.9~4.9 4.5~5.0 4.5~5.5 5.0~5.5 4.5-5.0 5.0-5.5 5.2-5.7 5.5-6.0 5.4-5.9 5.7-6.1 5.7-6.2 5.7-6.2 5.9-6.2 5.9-6.2 5.9-6.2 5.9-6.2 5.9-6.2 6.0-6.3 6.0-6.3 6.1-6.4