Precision Micro Molding — Medical, Electronics & Optics
SSP Precision delivers sub-millimeter injection molded parts with ±5 micron tolerances, starting from 0.1mm feature sizes. Trusted by global medical device, microelectronics, and optical leaders — manufactured in China, delivered worldwide.
What Is Micro Injection Molding?
Micro molding is a specialized injection molding process for producing extremely small, high-precision plastic parts — typically weighing less than 1 gram, with features as fine as 0.005mm. SSP Precision's micro molding capability serves the world's most demanding miniaturization requirements in medical, electronics, and optical applications.
Our sub-millimeter manufacturing combines ultra-precision tooling, specialized micro-injection equipment, advanced metrology, and ISO 13485 quality management — achieving a documented 99.98% first-pass yield rate across 500+ production runs.
Four Pillars of Micro Molding Excellence at SSP
Every micro molding project is built on four independently verified technical foundations — each critical at the microscopic scale where conventional molding standards simply don't apply.
Ultra-Precision Tooling
Molds machined with sub-micron EDM and micro-milling. Tool steel cavities achieving Ra ≤4μin surface finish, validated by white light interferometry before first shot.
Micro-Injection Equipment
Dedicated micro-injection presses with shot sizes from 0.005cm³. Closed-loop process control maintains injection velocity consistency to within 0.01mm/s per shot.
Advanced Micro-Metrology
CMM with 0.5μm resolution, optical comparators, confocal microscopes, and white light interferometry verify every critical dimension on 100% of first articles.
ISO 13485 Medical QMS
Full quality management system compliant with ISO 13485 for medical device manufacturing. Traceability from raw material lot through every production step to final delivery.
Micro Molding — Real Parts, Real Precision
Click any image to explore the detailed specifications, industry applications, and manufacturing capabilities behind each micro molding offering.
SSP's Micro Molding Process — Step by Step
A repeatable 8-stage process engineered specifically for the demands of sub-millimeter part production — every stage validated and documented for medical and regulatory compliance.
DFM Micro Review
Specialized micro-moldability analysis — wall thickness minimums, micro-feature draft angles, parting line strategy, and gate location for sub-gram shot volumes.
Sub-Micron Tooling
EDM and micro-milling of mold cavities to ±1μm accuracy. Surface Ra ≤4μin (0.1μm) verified by white light interferometry before first trial shot.
Material Preparation
Precision drying, color matching, and lot traceability for medical-grade PEEK, LSR, PA, POM, and 150+ specialist micro molding resins — ISO 13485 documented.
Micro-Injection
Shot sizes from 0.005cm³ on dedicated micro presses. Closed-loop velocity and pressure control maintains process consistency to within 0.01mm/s across every cycle.
Precision Cooling
Conformal micro-cooling channels maintain ±0.5°C mold temperature uniformity — critical for dimensional stability in sub-millimeter feature reproduction.
Micro-Metrology QC
CMM (0.5μm resolution), optical comparators, and confocal microscopes verify every critical dimension. NIST-traceable standards. 100% FAI on every new tool.
Post-Processing
Micro-deburring, ultrasonic cleaning, surface coating, assembly, and lot serialization — complete production-ready micro parts from a single China-based supplier.
Certified Global Delivery
ISO 13485 traceability documentation, FAIR reports, COC, and material certs ship with every order — worldwide delivery to medical, electronics, and optical OEMs.
150+ Specialist Materials · Micro-Grade Precision
SSP Precision processes the full spectrum of micro molding materials — from medical-grade biopolymers to high-performance engineering polymers — with documented tolerance compliance at the micron level.
Micro Molding Tolerances
NIST-Traceable MeasurementAll micro tolerances verified against NIST-traceable standards using 0.5μm-resolution CMM, confocal microscopy, and white light interferometry — aligned with ISO 2768-f (metals) and ISO 2768-m (plastics).
Dimensional Tolerance Reference (ISO 2768)
Standard grade (f) for metals, precision grade (m) for micro plastics components
| Nominal Size Range | Metals — ISO 2768-f | Plastics — ISO 2768-m | SSP Micro Grade |
|---|---|---|---|
| 0.5 – 3 mm | ±0.05 mm | ±0.10 mm | ±0.005 mm |
| 3 – 6 mm | ±0.05 mm | ±0.10 mm | ±0.008 mm |
| 6 – 30 mm | ±0.10 mm | ±0.20 mm | ±0.01 mm |
| 30 – 120 mm | ±0.15 mm | ±0.30 mm | ±0.02 mm |
| 120 – 400 mm | ±0.20 mm | ±0.50 mm | ±0.05 mm |
Micro Part Surface Finishes Available
Surface quality at the micro scale is critical. SSP offers a complete range of finishing options — from mirror polish cavity tooling to post-process electropolishing and specialty coatings.
Mirror Polish
Ra ≤4μin (0.1μm) — essential for optical and micro-optic components. Progressive diamond polishing verified by white light interferometry.
As Machined
Direct tool-finish surfaces with controlled Ra — fastest lead time option. Suitable for functional micro parts not requiring optical quality.
Electropolishing
Electrochemical process smoothing metal micro-insert surfaces — removes 2–10μm of material, improving corrosion resistance and eliminating micro-burrs.
Anodizing
Type II and Type III hard anodizing for aluminium micro-components — 5–50μm oxide layer. Hardcoat available for maximum wear resistance.
Micro Sandblasting
Controlled micro-abrasive blasting for uniform matte finish and improved adhesion — available in glass bead, Al₂O₃, and specialty abrasive media.
DLC Coating
Diamond-Like Carbon PVD coating (HV 4000+) — ultra-thin 1–5μm application preserving micro-feature geometry while dramatically extending wear life.
Brushed Finish
Directional grain brushing for metal micro-inserts — uniform linear texture improving grip and reducing specular reflectance on external surfaces.
Sterilization Ready
Medical micro parts validated for EtO, autoclave (121°C), gamma irradiation, and electron beam sterilization — material compatibility confirmed for each process.
Electroless Nickel
Uniform 3–25μm nickel coating over complex micro-geometries — uniform coverage regardless of feature depth, excellent corrosion resistance.
Passivation
Citric acid and nitric acid passivation for stainless steel and titanium micro inserts — removes free iron, maximizing corrosion resistance for medical applications.
Micro Precision from China — Global Standard, Local Cost
SSP Precision combines China's manufacturing cost efficiency with world-class micro molding technology — ISO 13485 certified, serving medical device OEMs, electronics manufacturers, and optical innovators across 30+ countries.
Micro Precision Made in China. Delivered to Your Industry.
SSP Precision's China-based micro molding facility serves medical device OEMs, electronics manufacturers, and optical component companies across 30+ countries — delivering certified micro parts with full ISO 13485 documentation.
Complete Precision Manufacturing — Beyond Micro Molding
Micro molding is one specialized capability within SSP Precision's complete manufacturing portfolio. Explore our full range of precision services — all available to complement your micro component requirements.
Injection Molding
Custom thermoplastic, LSR, overmolding, and insert molding — full production volumes from the same ISO-certified facility as our micro molding operations.
Injection Molds
P20, H13, S136 steel molds with micro-cavity capability. Hot runner and cold runner options — tooling rated for 500K+ production cycles.
Green Mold
Eco-friendly injection molding with bioplastics (PLA, PHA, Bio-PP), all-electric machinery, and closed-loop recycling. ISO 14001 certified sustainable manufacturing.
Tooling Spare Parts
Precision punches, die inserts, guide pins, and micro-mold components — rapid replacement parts to keep your micro molding operations running.
Ready to Manufacture Parts at the Microscopic Scale?
Upload your CAD files or share your micro molding specifications. SSP Precision's engineering team responds within 24 hours with a quote, material recommendations, and tolerance feasibility assessment — ISO 13485 documentation included on every medical order.