Liquid Silicone Rubber (LSR) Molding
Precision in Every Mold – Liquid Silicone Rubber (LSR) Molding for Flawless Results
“From Liquid to Finished Part in One Seamless, Automated Process”
5/5
Years of experience
From Liquid to Final Part: The Automated LSR Molding Process
Liquid Silicone Rubber (LSR) molding represents the pinnacle of precision manufacturing, combining advanced material science with fully automated production to deliver consistent, high-quality components. This sophisticated process converts liquid silicone into finished parts with exceptional accuracy, making it ideal for demanding industries such as medical devices, automotive systems, and consumer electronics.
Key Advantages of Automated LSR Molding
1. Unmatched Precision
Achieves tolerances within ±0.005mm for critical applications
Maintains dimensional stability across production runs exceeding 1 million cycles
2. Superior Material Performance
Processes medical-grade LSR (FDA, USP Class VI, ISO 10993 compliant)
Delivers temperature resistance from -60°C to +230°C
3. Optimized Production Efficiency
Fully automated systems reduce human intervention and contamination risks
Typical cycle times under 30 seconds for high-volume manufacturing
4. Advanced Process Control
Real-time monitoring of injection parameters (pressure, temperature, cure time)
Closed-loop material handling ensures 98%+ utilization efficiency
5. Design Flexibility
Capable of producing complex geometries including micro-features (<0.2mm)
Enables multi-material and multi-color components in single operations
20,000+ Precision Parts, 150+ Materials
4.9/5
Tolerance Standard
±0.0005" Precision Guarantee
Since 2015
5/5
Surface Finish
C8-16 μin Ra Mirror Finish
Since 2015
4.8/5
Maximum Workpiece
40" × 28" × 20" Capacity
Since 2015
4.5/5
Material Hardness
Up to 65 HRC Processed
Since 2015
Tolerance for Liquid Silicone Rubber (LSR) Services
Limits for nominal size
Metals (ISO 2768- f)
Plastics (ISO 2768- m)
0.5mm* to 3mm
±0.05mm
±0.1mm
Over 3mm to 6mm
±0.05mm
±0.1mm
Over 6mm to 30mm
±0.1mm
±0.2mm
Over 30mm to 120mm
±0.15mm
±0.3mm
Over 120mm to 400mm
±0.2mm
±0.5mm
Over 400mm to 1000mm
±0.4mm
±0.8mm
Over 1000mm to 2000mm
±0.5mm
±1.2mm
LSR Molding Performance Specifications
| Category | Parameter | Standard LSR Grade | Medical/Precision LSR Grade | Validation Method |
|---|---|---|---|---|
| Material Properties | Tensile Strength | 8-12 MPa | 10-15 MPa (Reinforced) | ASTM D412 |
| Tear Strength | 25-50 N/mm | 40-60 N/mm | ASTM D624 | |
| Hardness (Shore A) | 20-70A | 30-80A | ASTM D2240 | |
| Thermal Properties | Operating Temp Range | -60°C to +200°C | -70°C to +230°C | ASTM D1329 |
| Thermal Conductivity | 0.2-0.3 W/mK | 0.15-0.25 W/mK | ASTM E1461 | |
| Dimensional Control | Positional Tolerance | ±0.010″ | ±0.003″ | CMM (5μm) |
| Surface Finish (Ra) | 32-64 μin | 16-32 μin | White Light Interferometry | |
| Process Capabilities | Minimum Wall Thickness | 0.3mm | 0.15mm | Micro-CT Scanning |
| Undercut Capability | 0.5mm | 0.2mm | Mold Flow Analysis | |
| Biocompatibility | FDA/USP Class VI | No | Yes | ISO 10993 Testing |
| Cytotoxicity | – | Pass | USP <87> | |
| Environmental | Sterilization Resistance | 100 cycles (Autoclave) | 300 cycles (EtO/Gamma) | AAMI ST108 |
| Compression Set | 15-25% | 10-15% | ASTM D395 | |
| Electrical | Volume Resistivity | 10^14 Ω·cm | 10^15 Ω·cm | ASTM D257 |
| Dielectric Strength | 18-22 kV/mm | 20-25 kV/mm | ASTM D149 |
Liquid Silicone Rubber(LSR) Surface Finishes
We provide finishes for aesthetics and performance: anodizing, polishing, sandblasting, coatings, and heat treatment. Let’s find the right one!
As Machined
This machined finish is rough and displays tool marks, representing the most basic form of surface treatment without any additional finishing or polishing.
Anodizing
It creates a protective oxide layer on aluminum, increasing corrosion resistance and hardness, and allowing for dyeing to enhance appearance.
Polishing
Polishing smooths surfaces to a high sheen, enhancing appearance and reducing roughness while offering some corrosion protection.
Brushed Finish
A brushed finish has fine, parallel lines for a textured look, enhancing grip and reducing fingerprints.
Sandblasting
Sandblasting uses high-pressure air and abrasive particles to clean or texture surfaces, enhancing adhesion for coatings.
Electropolish
Electropolishing is an electrochemical process that smooths and brightens metal surfaces, removing imperfections and enhancing corrosion resistance.
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