High Precision Insert Molding & Overmolding
High Precision Insert Molding & Overmolding Manufacturer in Taiwan
40+ Years Experience | 1,000+ Mold Sets | 50 Million Parts Manufactured
Ming-Li Precision is a Taiwan-based high precision insert molding manufacturer and overmolding supplier specializing in advanced plastic injection molding solutions for automotive, EV, medical, electronics, industrial, and connector applications.
With more than 40 years of mold manufacturing and injection molding experience, Ming-Li Precision has successfully produced over 1,000 insert molding molds and manufactured more than 50 million insert molded parts for global OEM and Tier 1 customers.
Request Insert Molding SolutionsWhat is Precision Insert Molding?
Insert molding is an advanced plastic injection molding process that encapsulates metal or non-plastic inserts within thermoplastic materials during the injection molding cycle.
This manufacturing process creates a single integrated component that combines the advantages of multiple materials into one high-performance product.
Typical insert materials include brass inserts, stainless steel terminals, aluminum components, threaded inserts, busbars, PCB assemblies, ceramic inserts, magnets, silicon steel laminations, cables, and electronic components.
Insert molding pre molding made by Ming-Li Precision
Precision Overmolding for Multi-Material Plastic Components
Overmolding is a multi-material injection molding process that applies an additional layer of material over an existing substrate, insert molded component, or plastic part.
This process improves ergonomics, grip performance, waterproofing, electrical insulation, vibration damping, product durability, and cosmetic appearance.
Ming-Li Precision provides advanced overmolding solutions using engineering plastics, TPE, silicone, PEEK, PPS, PEI, and other high-performance thermoplastics.
Insert molding overmolding made by Ming-Li Precision
Why Choose Ming-Li Precision as Your Insert Molding Manufacturer?
- 40+ years of insert molding and mold manufacturing experience
- Over 1,000 sets of insert molding molds produced
- More than 50 million insert molded parts manufactured
- IATF 16949 certified insert molding manufacturer
- Fully in-house tooling department
- Mold precision up to ±0.0015 mm
- Product tolerance up to ±0.01 mm
- Automotive Tier 1 manufacturing experience
- Advanced insert molding automation systems
- DFM and Moldflow analysis support
- ZEISS X-ray CT 3D scanning inspection
Silicon steel insert molding made by Ming-Li Precision
Insert Molding vs Overmolding: Process Comparison
| Feature | Insert Molding | Overmolding |
|---|---|---|
| Process | Plastic molded around insert | Additional material molded over substrate |
| Main Purpose | Structural integration | Functional enhancement |
| Applications | Connectors, terminals, sensors | Handles, grips, sealed housings |
| Strength | Excellent structural strength | Improved ergonomics and sealing |
Automotive housing insert molding made by Ming-Li Precision
Benefits of Precision Insert Molding for Automotive and EV Applications
- Improved structural strength
- Reduced assembly operations
- Better dimensional stability
- Lower production costs
- Enhanced electrical conductivity
- Improved reliability
- Reduced part count
- Better product durability
- Higher manufacturing efficiency
- Improved sealing performance
Automotive connector insert molding made by Ming-Li Precision
Custom Insert Molding Applications for Automotive, Medical, Electronics and Industrial Parts
Automotive Insert Molding
Automotive connectors using PEEK, LCP, PPS, PBT or other high-performance engineering plastics, inverter modules, HV terminals, and EV battery components.
Medical Insert Molding
Medical device housings, diagnostic equipment, and precision medical components using engineering-grade thermoplastic materials.
Electronics Insert Molding
PCB insert molding, terminal blocks, cable overmolding, sensor modules, and connector components for electronic applications.
Industrial Insert Molding
Solenoid valves, gears, industrial connectors, precision assemblies, and high durability insert molded components.
Automotive TPMS sensor insert molding made by Ming-Li Precision
Insert Molding Material Capabilities and Insert Material Selection
Engineering Plastic Materials
- PEEK
- PPS
- PBT
- PA6
- PA66
- PA9T
- LCP
- PEI
- PC
- POM
- PET
Insert Materials
- Brass
- Stainless Steel
- Aluminum
- Ceramic
- Glass
- PCB
- Wafer
- Cable
- Silicon Steel Laminations
Automotive connector insert molding made by Ming-Li Precision
Insert Molding Production Process Overview
1. Material Preparation
Plastic materials and inserts are prepared and verified before production.
2. Insert Placement
Inserts are precisely positioned inside the mold cavity manually or automatically.
3. Injection Molding
Molten thermoplastic material is injected around the insert.
4. Cooling and Solidification
The molded component cools and solidifies under controlled conditions.
5. Inspection and Quality Verification
Dimensional, cosmetic, and functional inspections are performed before shipment.
Insert molding mass production line in Ming-Li Precision
ZEISS X-ray CT 3D Scanning Inspection for Insert Molded Components
Ming-Li Precision utilizes advanced ZEISS X-ray CT scanning technology for non-destructive inspection of insert molded components.
X-ray CT scanning allows internal structure verification, void detection, insert positioning analysis, dimensional verification, and defect analysis.
ZEISS X-ray CT inspection for insert molding components by Ming-Li Precision
Ming-Li Precision Insert Molding Manufacturing Capabilities
| Item | Capability |
|---|---|
| Insert Molding Experience | 1,000+ Mold Sets |
| Insert Molded Parts Produced | 50 Million+ |
| Mold Precision | ±0.0015 mm |
| Product Tolerance | ±0.01 mm |
| Vertical Injection Machines | 35T–250T |
| Horizontal Injection Machines | 15T–320T |
| Quality Certification | IATF 16949 |
| Inspection Equipment | ZEISS CT Scan |
Automotive brush holder insert molding made by Ming-Li Precision
Looking for a Reliable Insert Molding Manufacturer in Taiwan?
Contact Ming-Li Precision today for DFM support, material selection, mold design consultation, and custom insert molding manufacturing solutions.
Contact Ming-Li Precision