BONDED MAGNET

PERMANENT MAGNETS

BONDED MAGNETS

Plastic Bonded Permanent Magnets

The Bonded magnets, where magnetic material is mixed with some plastic components, can be compressed or injection molded; this magnets are available in Ferrite and Neodymium, offering a wide range of magnetic properties. Binder types include Nylon 6 (PA6), Nylon 12 (PA12) PPS and others. The field of application varies according to the combination of materials from 40 °C to 160 °C.
According to the different mixing solutions between binders and magnetic powders tehy could have different corrosion behavior, different mechanical strengths, particular magnetic properties and particular resistance to operating temperature.

The permanent magnet powder and the polymer are first kneaded together to form a compound. The compression or injection molding of Bonded permanent magnets is practically identical to the molding of normal plastic materials. The only difference is that for the production of anisotropic magnets the presence of an oriented magnetic field is necessary during the molding phase.

COMPLEX
SHAPES

The injection molding process is particularly suitable for complex shapes and parts with thin walls. This opens up completely new possibilities in the design of magnets and magnetic systems.

MULTIPOLE
MAGNETIZATION

The particular production process and their characteristics allow a wide variety of multipolar solutions, giving a finished product that has no need of future assembly.

WIDE RANGE OF
MAGNETIC FEATURES

The bonded neodymium based products have a range from 2 MGOe to 12 MGOe. Bonded ferrite based products have a range from 0.1 MGOe to 2.5 MGOe.

FAST
ASSEMBLY

Bonded magnets can be printed directly on a metallic or polymeric component (molding insert), so as to reduce assembly operations with other components.

APPLICATIONS

LIST OF MOST DIFFUSE APPLICATIONS

ELECTRIC MOTORS

Permanent Magnet motors have characteristics with high torque values ​​and compact dimensions.

SENSORS

Magnetic sensors are used to verify the position without contact. Use of NdFeB magnet offers very reduced dimension with high performance.

FAQs

TECHNICAL AND OPERATING INFORMATIONS

Differences between Injection and Compression?

  • Injection molding offers a greater variety of shapes and complexity than the compression one. The final material is isotropic: the design of the magnetization coil fixing device determines the magnetic model. Overmolding is possible with the injection molding process.
  • Compression molding usese a solid binder plus magnetic maeterial. The final material is isotropic - the magnetising coil fixture design determines the magnetic pattern. Compression molding is cost effective when higher volumes are required.