Injection Molded Magnet

Injection molded magnets are a type of permanent magnet that is made by injecting a magnetic compound into a mold. The resulting material can be molded into complex shapes, making it a versatile choice for many applications.

Classification

Isotropic: They have equal magnetic properties in all directions.

Anisotropic: They have a preferred magnetic orientation and are stronger in one direction than others.

Advantage

1.Versatile shape and size: They can be molded into a variety of shapes and sizes, making them suitable for a wide range of applications.

2.Complex shapes: They can be made into complex shapes that would be difficult or impossible to achieve with other types of magnets.

3.High precision: They can be made with very tight tolerances, ensuring high precision in their dimensions and magnetic properties.

4.Good resistance to demagnetization: They have good resistance to demagnetization, making them suitable for use in harsh environments.

Disadvantage

1.Lower magnetic properties: They have lower magnetic properties compared to other types of permanent magnets such as neodymium magnets.

2.Temperature limitations: They have a lower maximum operating temperature compared to other types of permanent magnets.

3.Higher cost: They can be more expensive than other types of magnets due to the production process.

Principle and Production process

These magnets are made by mixing magnetic powder with a polymer binder, such as nylon or PPS, and then injecting the mixture into a mold. The mold is then heated and the mixture solidifies into the desired shape. The resulting material is then magnetized, producing a permanent magnet.

Mixing: Magnetic powder is mixed with a polymer binder to create a magnetic compound.

Injection molding: The compound is injected into a mold under high pressure and temperature.

Cooling: The mold is cooled to solidify the compound into the desired shape.

Finishing: The magnet is trimmed, polished, and magnetized to the desired strength.

Application

Electric motors and generators

Sensors

Magnetic couplings

Magnetic bearings

Magnetic separation devices

Consumer electronics

Automotive parts

Medical devices

Aerospace components

Magnetic toys and games.