Medical Metal Injection Molding (MIM) enables the high-volume production of small, complex, and high-precision medical components with excellent strength, biocompatibility, and consistency.
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Medical Metal Injection Molding (MIM) enables the high-volume production of small, complex, and high-precision medical components with excellent strength, biocompatibility, and consistency.
Get A Quote Now
A. High-Precision 316L MIM Structural Components
Project Overview
We provide customized high-precision medical MIM metal components for an international medical device client. Such metal injection molded parts impose extremely strict requirements on corrosion resistance, dimensional accuracy and batch consistency.
- Industry: Medical Devices
- Process: Metal Injection Molding (MIM)
- Material: 316L Stainless Steel
- Annual Demand: Over 500,000 pieces
Project Challenges
- Poor consistency of original CNC machining
- Micro complex structural design
- Strict tolerance requirement (±0.03mm)
- Medical-grade corrosion resistance
Solutions
- Medical-grade quality management system
- DFM structural optimization tailored for MIM
- Micro precision mold design
- Precise debinding and sintering control
Project Achievements
✅ Cost reduced by over 30% vs. CNC machining
✅ Yield rate increased to 98.5%
✅ Stable tolerance within ±0.01mm
✅ Lead time shortened by 40%
Customer Benefits
Reduced long-term manufacturing costs
Stable mass production of customized MIM components realized
Greatly improved product consistency
B. Medical Micro Precision Transmission Assemblies (High-Consistency MIM Solution)
Project Overview
We supply micro precision MIM parts for the internal transmission systems of high-end medical devices, which serve as critical moving structures.
- Material: 316L Stainless Steel
- Features: High precision / Superior corrosion resistance / Excellent batch consistency
- Batch Volume: Over 300,000 pieces per year
Project Challenges
- Inability of CNC machining to guarantee batch consistency
- Micro gear teeth and complex transmission structures
- Strict assembly accuracy requirements
- Stable performance under long-term operation
Solutions
- 100% dimensional inspection system
- MIM molding optimization for micro structures
- Precision mold and runner design
- Sintering dimensional control
Project Achievements
✅ Stable precision within ±0.02mm
✅ Yield rate up to 98% and above
✅ Production efficiency improved by 35%
Customer Benefits
- Realized domestic substitution of high-end medical device components
- Enhanced operational stability of medical equipment
- Lower maintenance and replacement costs
MIM vs Traditional Manufacturing Processes
| Item | MIM | Powder Metallurgy | Investment Casting | CNC Machining |
| Relative Density | 98% | 86% | 98% | 100% |
| Tensile Strength | High | Low | High | High |
| Surface Finish | High | Medium | Medium | High |
| Miniaturization Capacity | High | Medium | Low | Medium |
| Thin-Wall Forming Capacity | High | Medium | Medium | Low |
| Geometric Complexity | High | Low | Medium | High |
| Design Tolerance Latitude | High | Medium | Medium | Medium |
| Material Selection Range | Wide | Wide | Moderate | Wide |
Surface Treatment Classification Table
| Category | Representative Processes | Core Applications |
| Mechanical Post-treatment | Tumbling, Sandblasting, Mechanical Polishing, Vibratory Grinding | Deburring, surface roughness adjustment, basic surface finishing |
| Chemical & Electrochemical Treatment | Chemical Polishing, Electropolishing, Passivation, Pickling | Improve surface gloss, enhance corrosion resistance, remove oxide scale |
| Plating & Coating | Electroplating, Electroless Nickel Plating, PVD, DLC, Anodizing | Wear & corrosion resistance, hard coatings, decorative coloring |
| Heat Treatment | Vacuum Quenching, Age Hardening, Carburizing / Nitriding, Carbonitriding | Boost hardness & tensile strength, surface strengthening |
| Special Treatments | Black Oxide Coating, Impregnation & Sealing, Spraying, Laser Marking, Brushed Finishing | Sealing for air tightness, decorative marking, special surface |
Get In Touch
FAQ
Here are some of the questions we get asked often. If yours isn’t answered, don’t hesitate to contact us, we’re happy to help!
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How do you ensure the quality of the parts you manufacture?
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We apply full-process quality control across every stage: incoming material inspection, mold precision verification, MIM process parameter monitoring, debinding & sintering control, CNC/turning tolerance checks, and final surface treatment with dimensional measurement. Each batch undergoes AQL sampling inspection, and we provide full material certifications and inspection reports on request.
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Can you provide assistance during the design phase?
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Yes. Our engineering team offers free DFM (Design for Manufacturability) review. We help optimize wall thickness, draft angles, gate placement, and tolerances specifically for MIM. With in-house mold design and manufacturing capability, we can validate feasibility quickly and suggest cost-effective alternatives before tooling begins.
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What is your experience with high-precision parts?
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We have extensive experience producing high-precision MIM parts for 3C electronics, medical devices, and automotive applications — with tolerances as tight as ±0.02mm and surface roughness down to Ra 0.4μm after polishing. Our precision is backed by CNC machining, CNC turning, and coordinate measuring equipment, ensuring consistent quality even at high volumes.
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What materials can you process for MIM parts?
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We support the processing and production of various high-quality metal materials, covering mainstream metal materials required by high-precision industries: austenitic stainless steel, precipitation hardening stainless steel, martensitic stainless steel, low-alloy steel and non-ferrous light metals. Different materials have independent mature production processes, which can meet customer requirements for product hardness, corrosion resistance, wear resistance, toughness and lightweight performance.
