Huaxiao Manufacturing

Metal Injection Molding (MIM) Services

Huaxiao delivers high-precision Metal Injection Molding (MIM) parts — the optimal process for small, complex metal components in medium to high production volumes. MIM combines the design freedom of plastic injection molding with the strength and performance of wrought metals. Parts achieve 95–99% theoretical density with mechanical properties comparable to wrought materials.

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Why Choose Huaxiao for Metal Injection Molding (MIM)?

Industry-leading capabilities backed by ISO 9001:2015 certification and 15+ years of precision manufacturing experience.

Unlimited Geometric Complexity

Internal threads, undercuts, thin ribs, cross-holes, and complex 3D contours — all formed in a single injection shot with no secondary machining.

Near-Wrought Mechanical Properties

95–99% theoretical density after sintering. Tensile strength, hardness, and corrosion resistance approach those of wrought bar stock.

Tight Dimensional Tolerances

Standard tolerance ±0.3% of dimension. Precision MIM achieves ±0.1% on critical features — far tighter than investment casting.

Superior Surface Finish

As-sintered surface finish of Ra 0.8–1.6µm eliminates or significantly reduces secondary polishing or machining requirements.

Broad Material Range

Stainless steels (316L, 17-4PH, 440C), low-alloy steels, tool steels, titanium alloys, and specialty alloys including Kovar and Invar.

Technical Specifications

Process Steps	Feedstock Mixing – Injection Molding – Debinding – Sintering
Part Weight	0.02g – 300g
Max Dimensions	100mm x 100mm x 100mm
Tolerance	±0.3% standard, ±0.1% precision on critical features
Density	95–99% theoretical (as-sintered)
Surface Finish	Ra 0.8 – Ra 1.6µm (as-sintered)
Materials	316L, 17-4PH, 420, 440C, 4605, Fe-Ni, Fe-Si, Titanium Grade 2/5, Kovar, Invar
Certification	ISO 9001:2015, ISO 13485 (Medical Devices)

Industry Applications

✓Medical and surgical instruments and implant components
✓Firearms components (triggers, safeties, ejectors, sights)
✓Consumer electronics (hinges, SIM trays, connectors, camera parts)
✓Automotive sensors, fuel injectors, and micro components
✓Watchmaking and jewelry components

Quality You Can Trust

ISO 9001:2015 certified. Every part is dimensionally inspected, material-certified, and quality-verified before shipment.

✓ CMM Dimensional Reports
✓ Material Certs (EN 10204 3.1)
✓ NDT Available (UT / MT / PT / RT)
✓ RoHS & REACH Compliant
✓ Third-party Inspection Welcome

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Complex Small Parts? MIM Is Your Answer.

Upload your drawings or specifications — receive a detailed quote within 24 hours. No obligation.

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Frequently Asked Questions

How does MIM compare to traditional machining or casting?

For complex parts in volumes above 5,000 pieces, MIM reduces per-part cost by 40–70% versus multi-axis CNC machining. Compared to investment casting, MIM achieves tighter tolerances (±0.3% vs ±0.5%) and better surface finish.

What is the typical lead time for MIM parts?

Mold manufacturing: 4–6 weeks. First article samples and PPAP: 2–3 weeks post-mold. Production ramp: 3–4 weeks. Total: approximately 9–13 weeks to first production shipment.

What materials are available for MIM?

Standard MIM materials: 316L (corrosion resistance), 17-4PH (high strength + corrosion), 420/440C (wear resistance + hardness), Fe-2Ni and Fe-8Ni (cost-effective structural), titanium Grade 5 (biocompatible).

Can MIM parts be post-processed?

Yes. Post-sintering operations include: precipitation hardening, CNC machining of critical features, electropolishing, passivation, PVD/DLC coating, electroplating, and black oxide treatment.

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Metal Injection Molding (MIM)