Injection Molded Plastic Electronics Components & Mold Manufacturer
Topworks designs and builds high-precision injection molds for consumer electronics, electrical enclosures, micro-connectors, and automotive sensor housings. From UL94 V-0 flame-retardant PC/ABS to high-temperature PPS and LCP, we hold tight tolerances down to ±0.05 mm.
- Tolerances down to ±0.05 mm
- UL94 V-0 ABS, PC, PA66+GF, PPS, LCP
- Insert molding & 2K overmolding
- 500K-1M+ shots H13 / S136 steel
Electronics & Electrical Tooling Specifications
| Parameter | Engineering Specification |
|---|---|
| Engineering Resins | ABS, PC, PC/ABS (enclosures) · PA66+30%GF, PBT+30%GF, PPS, LCP (connectors & high-heat parts) |
| Typical Components | Control enclosures, terminal blocks, bobbins, pin headers, sensor housings, switch plates, LED optics |
| High-Temp Processing (PPS/LCP) | 290-340°C melt temp; 130-150°C mold temp via hot-oil TCU for 200°C+ continuous service parts |
| Dimensional Tolerance | ±0.10 mm standard · ±0.05 mm on precision pitch & sealing features |
| Advanced Processes | Automated brass/copper terminal insert molding, 2-shot (2K) TPE sealing, thin-wall shielding |
| Cavity & Core Steel | Assab S136 / 1.2316 (high-gloss & corrosion resistant), H13 / SKD61 (glass-filled wear resistance) |
Thermoplastic Shrinkage Rates for Electronics Design
Controlling warpage on thin-wall electronic housings and maintaining pin-to-pin pitch on connectors requires accurate shrinkage compensation before cutting steel:
| Resin Grade | Typical Mold Shrinkage (%) | Key Electrical / Mechanical Application |
|---|---|---|
| LCP (Liquid Crystal Polymer) | 0.05% – 0.20% | Ultra-fine pitch SMT connectors, high-frequency 5G components |
| PPS + 40% GF | 0.10% – 0.25% | EV power electronics, under-hood sensors, high-heat bobbins |
| PC / ABS Alloy | 0.40% – 0.60% | Thin-wall smart device enclosures, routers, charger housings |
| PC + 30% GF | 0.15% – 0.30% | Structural frames, load-bearing instrument housings |
| PBT + 30% GF | 0.20% – 0.50% | Automotive harness connectors, coil formers, relay boxes |
| PA66 + 30% GF | 0.30% – 0.70% | Terminal blocks, circuit breaker housings, cable glands |
| UL94 V-0 ABS | 0.40% – 0.70% | Consumer appliance shells, junction boxes, control panels |
Electronics Injection Molding FAQ
What electronics parts are best suited for injection molding?
Connectors, housings, enclosures, bobbins, terminal blocks, and high-volume components with repeatable geometry. We optimize gate locations and venting to prevent burn marks on thin walls.
Can you build multi-cavity molds for small electrical connectors?
Yes. We build 8, 16, 32, and 64-cavity molds with balanced feed systems and EDM micro-machined inserts to hold ±0.05 mm pitch accuracy across all cavities.
Do you support metal terminal insert molding and 2K overmolding?
Yes. We run vertical rotary-table presses for brass/copper busbar and pin insert molding, as well as two-shot (2K) injection molding for IP67 waterproof TPE seals on PC/ABS enclosures.
Ready to Tool Your Electronic Enclosure or Connector?
Send your 3D STEP/IGES files and UL/tolerance requirements. Our engineers will return a full DFM analysis and itemized tooling quote within 24 hours.
