Two-shot and co-injection molding review for magnetic assemblies that combine magnet material with structural plastic, carriers, or sealing features.
Two-Shot Magnetic Injection Molding is most relevant when best for design teams trying to combine magnet, carrier, sealing, or mechanical features into a molded assembly. Typical oem capability programs include Magnetic sensor carriers, Pump impeller assemblies, and Actuator gears and housings, so the early review should confirm shot sequence, interface geometry, resin compatibility, and mechanical 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 interface reliability (Pull-out, peel, torsion, leak, or thermal-cycle target by design), because two-shot parts fail at the interface when resin compatibility and geometry are not engineered early.
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 function separation and magnetic pattern accepted without measurable criteria before moving from prototypes to repeat production.
| Program Metric | Typical Range | Procurement Value |
|---|---|---|
| Interface reliability | Pull-out, peel, torsion, leak, or thermal-cycle target by design | Two-shot parts fail at the interface when resin compatibility and geometry are not engineered early. |
| Function separation | Magnetic zone, mechanical datum, sealing area, and assembly features | The part must keep magnetic material where it helps while protecting surfaces that must remain structural or clean. |
No. Two-shot molding is useful when two molded materials must be integrated. Insert molding may be simpler when the carrier is metal or a preformed plastic part.
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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