Insert moulding places metal hardware into the cavity before the shot, so the plastic forms directly around it. The result is a load-rated threaded interface, an electrical connection or a rigid frame that cannot come loose the way a press-fit or ultrasonically set insert can.
Brass, stainless and aluminium inserts moulded in place
Threaded bosses rated for repeated fastening cycles
Busbars, lead frames and electrical contacts
Magnets encapsulated for sensors and actuators
Metal frames and stiffeners overmoulded with resin
Pre-mould and automatic insert loading options
| ABS, PC and PC/ABS |
| PA66 and glass-filled PA |
| PBT and PET for electrical parts |
| PPS for high-temperature use |
| TPE and TPU for sealed designs |
| Flame-retardant V-0 grades |
| Specification | Details |
|---|---|
| Insert types | Threaded, knurled, flanged, bushings, pins |
| Insert materials | Brass, stainless, aluminium, steel |
| Pull-out strength | Verified by destructive testing per lot |
| Quantity | from 500 pieces |
| Tooling | Insert pockets designed for correct retention |
| Leak tightness | Down to IP67 for sealed enclosures |
Pre-treatment of inserts for adhesion
Degreasing and oxide removal
Thread cleaning and gauging
Anodizing on visible aluminium parts
A moulded-in insert is encapsulated on all sides, so it resists pull-out, torque and vibration far better than a post-installed insert. It also removes the installation step and its quality risk.
Yes. Parts with four to eight inserts are routine, and we build loading fixtures so the insert positions are repeatable shift to shift.
For high-melt resins and large metal masses we preheat the insert to prevent cold welds and shrinkage voids. The DFM report states whether your part needs it.
Rapid aluminum & production steel tooling, T1 samples in 7–15 days.
Production plastic injection moulding from 100 to 100,000+ parts. Hardened steel multi-cavity tooling, 100+ resins, scientific moulding and full PPAP support.
Aluminium rapid tooling for 100-5,000 part pilot runs. T1 samples in 7-10 days, production-like parts, and a straight path to steel tooling when volumes grow.
Mould design and manufacture in-house: 2-plate, 3-plate, hot runner and stack moulds in P20, H13 and S136 steel. DFM and mould flow analysis on every tool.
Overmoulding and two-shot moulding of soft-grip TPE/TPU over rigid substrates, plus sealing rings and multi-material parts in one production flow.
Send your files today — DFM-checked quotation within 24 hours.