Injection-molded bonded magnet with multi-pole anisotropic orientation
Custom injection-molded bonded (plastic) magnets with controlled anisotropic magnetic orientation, enabling multi-pole patterns in complex shapes for sensor and motor applications.
AI-assisted directory summary. Technical specifications, performance metrics, readiness and compliance labels are unverified unless individually supported and reviewed. Proposed partnership routes do not establish supplier consent, export eligibility, or willingness to sign an NDA. Confirm claims and test conditions with the linked sources and supplier before procurement or citation.
Problem solved
Enables compact, complex-shaped permanent magnets with tailored multi-pole magnetization patterns (radial, pole-anisotropic, convergent) for high-precision sensors and miniaturized motors, while offering rare-earth-free material options.
Application contexts
- EV/PHEV high-voltage contactor magnets
- Motor rotor magnets (radial and pole-anisotropic)
- Encoder position sensor magnets (fine-pitch multi-pole)
- Magnet rollers for OA equipment (patented 2-part shaft-integrated)
- Automotive sensor magnets (steering angle, rotation speed)
Technical principle
Bonded magnets are produced by compounding magnetic powder (ferrite, NdFeB, SmFeN, or iron nitride) with thermoplastic resin and injection-molding under an orienting magnetic field. In-house magnetic field simulation is used to design the mold cavity's magnetic circuit, controlling the anisotropic alignment of magnetic powder particles. Convergent orientation (patented, licensed from JFE Chemical) concentrates magnetic flux by varying N/S pole area ratios. Multi-pole indexing magnetizers enable fine-pitch (sub-mm) magnetization patterns for encoder and sensor applications.
Typical use cases
- Multi-pole encoder magnets for EV traction motor position sensing
- High-voltage DC contactor magnets for PHEV battery disconnects
- Radial-orientation bonded magnet rings for miniaturized servo motors
- Convergent-orientation magnets for high-torque-density actuators
Partnership route
How global engineering teams typically engage this asset.
Helpful to include: target magnetic properties (Br, HcJ, BHmax) · magnet dimensions and tolerance requirements · pole count and magnetization pattern · operating temperature range · annual volume · preferred material (ferrite/NdFeB/SmFeN/rare-earth-free)
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Source & provenance
Translation review status: unreviewed. Publication does not establish technical verification or supplier endorsement.
Original language: JA.
Record updated: .
- ピーエム技研株式会社 公式サイト
https://www.pmgiken.co.jp/
Primary-source candidate; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
- US8750768B2 - Magnet roller (PM Giken assignee)
https://patents.google.com/patent/US8750768B2/
Supporting / discovery source; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
- WO2011152179A1 - マグネットローラ (PM Giken assignee)
https://patents.google.com/patent/WO2011152179A1/
Supporting / discovery source; evidence review: pending.
Source accessed / recorded (collector timestamp): .
Source publication date: Not recorded.
Collector timestamps record when a source was stored, not an independent verification date. Source links provide context; they do not validate every specification, readiness label, certification, or proposed partnership route.