LSR Liquid Silicone Rubber Injection Molding
Achieve micron-level tolerances, complex geometries, and medical-grade cleanliness with our advanced LSR injection molding technology.
Liquid Silicone Rubber Injection Molding Capacities
Siliconexy specialize in custom Liquid Silicone Rubber (LSR) injection molding for medical, consumer goods, automotive, electronics, industrial and consumer applications, delivering ultra-precise, biocompatible and durable parts with efficient mass production capabilities.
We support both standalone LSR parts and integrated builds through a liquid silicone rubber injection molding service model aligned with your drawings, tolerances, and test requirements.
What Is LSR Injection Molding?
LSR injection molding is an advanced manufacturing process that uses two-component liquid silicone rubber, mixed and injected into precision molds under controlled temperature and pressure, then cured to form high-quality silicone parts.
Unlike traditional compression molding, LSR injection molding uses low-viscosity liquid silicone that flows easily into intricate mold cavities, enabling the production of micro-components, thin-walled parts and complex geometries with minimal waste. The process is fully automated, ensuring uniform part quality, tight tolerances and efficient production cycles.
Why Choose LSR Injection Molding Over Compression Molding
Advantages | Characteristics of LSR Injection Molding |
Precision & Complexity | Achieves tolerances as tight as ±0.01mm; ideal for micro-molding, thin walls (as low as 0.2mm), and intricate geometries |
Cycle Time & Volume | Fully automated with cycle times as low as 15–60 seconds; optimal for high-volume production (10k–10M+ units) |
Purity & Compliance | Inherently biocompatible; available with ISO (medical), FDA, USP, and food-contact grades |
Temperature Resistance | Maintains performance from -50°C to 250°C; ideal for automotive under-hood applications and medical sterilization |
Aesthetics & Touch | Smooth, non-stick surface finish; self-healing properties; available in custom colors with consistent cosmetic quality |
Applications for LSR Injection Molded Parts
Food Grade LSR: Non-toxic, odorless, waterproof, heat-resistant, dishwasher-safe, soft touch.
Baby bottle nipples, baby bibs, teether toys, baby, pacifiers, kitchenware seals, personal care product components, waterproof accessories, baking molds (LFGB certified), etc.
Medical Grade LSR: Biocompatible, sterilizable (autoclave/ETO), non-irritating, low compression set.
Syringe stoppers, surgical instrument grips, respiratory masks, implantable components (biocompatible). Medical device components, surgical instruments, drug delivery systems, infant care products, wound care parts (FDA/ISO 10993 certified) etc.
Smartwatch bands, ear tips, waterproof seals (IP68), camera buttons, protective cases. Waterproof connectors, cable grommets, keypad membranes, insulation sleeves, sensor housings, wearable device components, etc.
High-Temp LSR: Withstands -60°C to 250°C, thermal stable, anti-aging, chemical resistant.
Seals, gaskets, O-rings, sensor components, LED light covers, steering wheel grips, under-hood high-temp parts, etc.
General Industrial LSR: Weather-resistant, electrical insulation, wear-resistant, good sealing performance.
Diaphragms, O-rings, custom seals for pneumatic systems, hydraulic seals, precision gaskets, chemical-resistant components, vibration dampers, thermal insulation parts, etc.
LSR Injection Molding – Technical Specifications
We offer full-spectrum custom services to match your unique LSR project requirements, with flexible production scales and strict quality control.
Parameter Category | Capability Range |
Tolerance | ±0.01mm to ±0.05mm (CNC-ground molds with precision alignment) |
Part Size | Micro parts: 0.01g – 500g; up to 400mm x 400mm for larger components |
Wall Thickness | 0.2mm (thin-film applications) – 10mm (thick-walled seals) |
Hardness Range | 20 Shore A – 80 Shore A (custom blends available) |
Mold Materials | Hardened steel (S136, 718H) with mirror polish for optical-grade surfaces |
Mold Systems | Hot runner / cold runner; fully automated degating available |
Standards | ISO 9001:2015, ISO 13485 (medical), IATF 16949 (automotive), RoHS, REACH, FDA, LFGB |
Custom LSR Injection Molding Process
Below is our product customization workflow for plastic injection molding services. Partner with us for a smooth, efficient, and innovative journey from concept to completion.
Why Partner With Us for LSR Injection Molding?
- Professional LSR Expertise: 10 Years of experience serving overseas buyers, proficient in international trade terms, documentation and industry-specific quality standards for LSR.
- Strict Quality Control System: ISO 9001 certified factory, full-process QC testing, traceable material sourcing and detailed inspection reports provided for order.
- Flexible Order Scales: Support prototype samples, small-batch trials and large-scale mass production to meet diverse project cycles and volume demands.
- Fast Lead Times: Optimized mold fabrication and automated production lines, with lead times as short as 8-15 days for prototypes and 2-6 weeks for mass production.
- Dedicated Engineering Support: In-house R&D team specializing in LSR molding, able to solve complex design challenges and optimize product performance for harsh environments.
- Hassle-Free Global Shipping: Experienced in international export, supporting FOB and other trade terms, with secure packaging for long-distance shipping.
