Injection-molded plastic magnets for complex, lightweight parts
Injection molding of ferrite or NdFeB powder in a thermoplastic binder (PA or PPS) to make bonded-magnet parts with 3D geometry, insert-molded shafts/gears, and no post-grind in the cases the company describes.
Problem solved
Sintered magnets are limited to simple block/arc shapes, chip easily, often need grinding, and lock the design to a high rare-earth sintered grade. Plastic-magnet injection is used when the buyer needs complex 3D geometry, thin walls, insert-molded metal, lower inertia, or a ferrite-bonded option that does not depend on sintered NdFeB.
Application contexts
- Automotive auxiliary motors and sensors
- Industrial equipment magnet parts
- Power-tool rotors and stators where bonded magnets are acceptable
Technical principle
Magnetic powder (ferrite or neodymium) is compounded with a thermoplastic binder (PA or PPS) and injection-molded. The company states a skin layer forms during molding, which it claims is advantageous for corrosion resistance versus exposed sintered bodies. Insert molding can place a shaft or gear in the same shot. Magnetic performance is lower than sintered magnets; the trade is shape freedom, chipping resistance and dimensional control without grind.
Typical use cases
- Complex 3D bonded-magnet part that cannot be sintered without chipping
- Insert-molded shaft or gear magnet for a small motor
- Ferrite-bonded substitute when sintered NdFeB is not required by the magnetic circuit
Partnership route
How global engineering teams typically engage this asset.
Helpful to include: required Br / torque / air-gap flux · preferred powder (ferrite vs NdFeB) and binder (PA vs PPS) · geometry / insert metal · operating temperature · annual volume
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- Source: プラマグ射出成形 | 株式会社ニューテック
- Original language: JA
- Summary AI-assisted; translation status: Unreviewed