Overmold bonded magnet material onto shafts, hubs, bushings, and carriers to reduce adhesive assembly and alignment risk.
Insert Molding and Magnet Overmolding is most relevant when best for buyers replacing glued magnet assemblies or adding magnetic function to an existing mechanical part. Typical oem capability programs include Shaft-mounted rotors, Sensor hubs, and Motor rotor assemblies, so the early review should confirm insert material, surface preparation, pull-out force, and torque retention.
Before sample tooling, align on 2D/3D drawing, material target, magnetic pattern, and sensing datum and operating temperature, vibration, media exposure, and lifetime requirement. The first acceptance check is retention force (Defined by pull-out, push-out, or torsion requirement), because a sensor rotor can pass magnetic testing but still fail if the insert interface moves under load.
The main risk is brittle sintered magnet carried into a vibration-critical assembly; control it by review bonded magnet material and molded geometry when chipping, cracking, or adhesive failure can affect functional safety. Also review validation handoff and magnetic pattern accepted without measurable criteria before moving from prototypes to repeat production.
| Program Metric | Typical Range | Procurement Value |
|---|---|---|
| Retention force | Defined by pull-out, push-out, or torsion requirement | A sensor rotor can pass magnetic testing but still fail if the insert interface moves under load. |
| Validation handoff | Operating temperature, vibration, media exposure, and lifetime requirement | It connects Insert Molding and Magnet Overmolding design intent to sample approval, lot inspection, and production sourcing decisions. |
Often yes. Insert molding can combine magnet and mechanical carrier in one molded part, but retention and thermal cycling targets should be defined early.
Include 2D/3D drawing, material target, magnetic pattern, and sensing datum, operating temperature, vibration, media exposure, and lifetime requirement, and sample quantity, tooling target, annual forecast, destination, and PPAP needs. If the part is tied to automotive or safety-critical sensing, also include PPAP, traceability, and magnetic test expectations.
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Include drawing, material, pole pattern, temperature, compliance, and PPAP needs.
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