High-quality LSR Injection Molded Parts
LSR injection molding injects a two-part liquid silicone compound (base + catalyst in 1:1 ratio) into a heated mold where it vulcanizes into a permanent, cross-linked elastomer. Unlike thermoplastics that can be remelted, LSR's thermoset nature ensures dimensional stability and performance retention across extreme temperatures (-60°C to 230°C).
At Fecision, our ISO 13485:2016 quality management system governs every medical program — from incoming material certification through production, first-article CMM inspection (Cpk ≥1.67 on critical features), and full batch traceability. PPAP submission support is available for medical device customers requiring supplier qualification documentation.
What is Liquid Silicone Rubber (LSR)
Liquid Silicone Rubber (LSR) is a high-purity, versatile thermoset elastomer renowned for its exceptional performance characteristics. It is a two-part, platinum-cured silicone system (typically an A component and a B component mixed in a 1:1 ratio) that, once cured, offers a unique combination of properties making it an ideal choice for a vast array of demanding applications.
| Property | Typical Range | Standard |
|---|---|---|
| Hardness (Shore A) | 10 – 80 | ISO 7619-1 |
| Tensile Strength | 7 – 12 MPa | ISO 37 |
| Elongation at Break | 400% – 800% | ISO 37 |
| Tear Resistance | 17 – 47 kN/m | ISO 34-1 |
| Density | 1.11 – 1.20 g/cm³ | ISO 2781 |
| Temperature Range | -60°C to +230°C | – |
LSR Injection Molding Expertise
Our workshop is equipped with high-precision LSR injection molding machines (50-300 ton capacity), capable of handling a wide range of part sizes and complexities. We utilize automated material delivery systems and robotic part removal for consistent, efficient production.
Our engineering team possesses extensive expertise in selecting and processing a diverse portfolio of LSR grades to match the unique demands of each application. This includes medical-grade (USP Class VI), FDA-compliant, conductive, and self-lubricating LSR materials.
Fecision boasts comprehensive in-house mold design and manufacturing capabilities specifically tailored for LSR injection molding. Our tooling achieves 0.01mm tolerance capability with both hot and cold runner systems available.
Our services include post-molding operations like post-curing for enhanced properties, precision deflashing to remove any residual material, custom packaging solutions to protect your parts, and assembly services.
For components requiring pre-sterilization packaging qualification, Fecision provides cleanroom packaging validated per ISO 11607.
Fecision is designed to pass your supplier qualification audit.
Our ISO 13485:2016 QMS documentation, equipment calibration records, process validation files, and environmental monitoring logs are maintained audit-ready at all times.
What we make available for supplier qualification:
Fecision produces combination components where LSR is directly molded onto thermoplastic substrates in a single production cell — eliminating secondary assembly and adhesive bonding steps.
Request A QuotePA6, PA66, PBT, PC, and other engineering plastics validated for LSR adhesion.
Substrate surface activation is specified based on the material pairing and validated before production release.
Two-shot overmolded components eliminate separate bonding operations · adhesive outgassing risk in cleanroom environments · delamination failure modes in service · BOM complexity and assembly labour cost.
Specs & Model: XK-300X700
Capacity: 70 ton
Brand: Kraton Machinery
Capability: 1560w pcs/month
Specs & Model: 203-125*100
Capacity: 1500w pcs/month
Brand: Desrui
Capability: 12000w pcs/month
Specs & Model: XHMO-3
Controlled post-curing
The inherent properties of LSR, such as its biocompatibility, chemical inertness, sterilizability, and durability, make it an ideal material for a wide array of medical devices and components. We manufacture parts that come into direct patient contact, as well as components for diagnostic and surgical equipment.
Seals, Gaskets, O-rings for diagnostic equipment, infusion pumps and respiratory devices; Diaphragms and Valves for fluid management systems, drug delivery devices and medical pumps. Parts for wearables, catheters, respiratory masks and dental applications; Surgical Instrument Components like Handles and Grips; Drug Delivery Components like Plungers and Stoppers.
See MoreLSR is increasingly used in electronics due to its soft-touch feel, durability, water resistance, and ability to be molded into intricate designs.
Keypads and Buttons for remote controls, mobile phones and other electronic devices; Seals and Gaskets for portable electronics, wearables and outdoor equipment; Protective Coverings and Casings for smart devices; Components for Wearable Technology like Wristbands Seals and Sensor Housings
See MoreFecision serves various industrial sectors with LSR components designed for reliability and performance in demanding operational environments. These applications often require resistance to chemicals, extreme temperatures, and mechanical stress.
Seals, Valves, Membranes for industrial equipment, pumps and fluid handling systems; Gaskets and O-rings for a wide range of industrial machinery and processing equipment; Electrical Insulators and Connectors
See More
Your Strategic Partner for LSR Injection Molding Success
Certifications: ISO 9001:2015 · ISO 13485:2016 · AS9100 Rev D · GMP 21 CFR Part 820 compliant cleanroom · QC080000 · ISO 14001:2015 · ISO 45001:2018. Quality metrics: Cpk ≥1.67 on critical-to-quality dimensions. Full batch traceability from raw material CoA to finished part release. PPAP submission support included with medical programs.
16+ years of LSR injection molding experience across medical, electronics, and industrial programs. Our engineers have qualified LSR processes for Class I, II, and III medical devices — including products requiring IQ/OQ/PQ process validation under ISO 13485 Clause 7.5.6. We design and manufacture 500+ molds annually.
Manufacturing: 10,000+ sqm facility. Class ISO 7 cleanroom for medical and regulated programs. 50+ injection molding machines including LSR-dedicated cells with integrated cold runner systems and automated metering. All-electric LSR injection presses eliminate hydraulic oil contamination risk.
From DFM review to production release: Week 1–2 DFM review and material selection; Week 3–8 mould fabrication; Week 9–10 T0 trial and first-article CMM measurement; Week 11–12 OQ optimisation; Week 13–15 PQ validation; Week 16+ production release with full documentation package.
Validated Performance, Guaranteed Quality
Take the next step towards realizing your high-performance Liquid Silicone Rubber components.
We are committed to providing tailored solutions that meet your specific application needs and project timelines.
Every Fecision medical LSR program includes: IQ/OQ/PQ protocol execution and summary reports · CMM first-article report (Cpk ≥1.67 on critical features) · Material CoA per production lot · Full batch traceability records from raw material to part release.
For a standard medical LSR program: DFM review and approval (1–2 weeks) → mould fabrication (4–6 weeks) → T0 trial and first-article measurement (1–2 weeks). Total DFM-to-first-article: typically 8–12 weeks depending on part complexity.
Yes. Fecision welcomes customer quality audits as part of the supplier qualification process. Our ISO 13485:2016 QMS documentation, process validation records, and equipment calibration logs are maintained audit-ready. Remote documentation reviews and on-site audits can be scheduled with 2 weeks' notice.
LSR injection molding becomes most economical above approximately 15,000–30,000 parts per year, where automated cycle times (30–90 seconds) and zero flash trimming significantly reduce per-part cost vs. compression moulding. For lower volumes or development programs, we offer bridge tooling options.
