Insert-molded, two-shot and encapsulated magnets with engineering polymer overmolding. Sealed against moisture, chemicals and mechanical impact. Specified for automotive sensors, pumps, motors and medical devices where reliability under harsh conditions is non-negotiable.
Magnet inserted into a mold and encapsulated with polymer. Most common overmolding method for sensor and motor magnets.
Magnet pre-formed and overmolded in a second shot. Tighter dimensional control and integrated features.
Pre-assembled magnet encased in thermoset polymer. Used for harsh-environment sealing.
Representative overmolded magnets showing the polymer body encapsulating the magnet.
Ferrite magnet overmoulded for pump duty
Ferrite magnet sealed inside a polymer body
A visual record of magnetic material and assembly manufacturing, inspection and packing.
Manufacturing 
Manufacturing 
Manufacturing 
Inspection 
Inspection 
Packing Overmolding turns a magnet into a sealed, handled component. Polymer choice, insert position, flow, shrinkage, magnet temperature and the final interface must be developed together.
A drawing alone may not define the magnetic requirement. These inputs help us recommend the right grade, geometry, coating and inspection plan instead of quoting a generic part.
Specify temperature, chemicals, humidity, pressure, UV, sterilization, flame rating and expected service life for the polymer shell.
Provide magnet grade, coating, magnetization state, insert datum, keep-out zones, adhesive and the allowable magnetic shift.
Show clips, seals, ribs, bosses, draft, parting line, gate preference, ejection constraints and critical assembly dimensions.
State annual volume, cycle target, cavity strategy, traceability, cosmetic limits and any automotive or medical documentation needs.
Inspection scope should follow the failure mode. We can align the report format, sample quantity and release criteria during drawing review.
Measure magnet location, orientation, stand-off and critical molded dimensions against the functional drawing.
Test flux, pull, switching or sensor response on the final molded component, not only on the loose magnet.
Run the agreed temperature, humidity, chemical, pressure or sterilization exposure and retest function afterward.
Inspect voids, cracks, flash, weld lines, pull-off or torque retention and any leak or sealing requirement.
Insert molding and other encapsulation routes can be evaluated when the magnet, polymer and process window are compatible. The insert must be protected from heat, pressure and movement during molding.
The polymer itself may not change the magnet's intrinsic grade, but position, orientation, air gap, temperature and nearby material can materially change the functional field or sensor response.
Tooling responsibility and ownership can be defined during DFM review. The design should freeze the magnetic datum and critical molded interfaces before tool release.
Our engineering team can review material, operating conditions, magnetic requirements, manufacturing route and validation needs before quotation.