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).
FECISION reviews the applicable production-site quality system and project documentation with the manufacturing partner. Medical programs specify the component use, material records, traceability and validation requirements before the order is accepted.
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
The selected manufacturing partner matches the liquid silicone injection cell, metering system, mold and part-removal method to the project. Press size, shot weight and capacity are confirmed for the actual part.
We review the silicone grade, hardness, color, service temperature and contact requirements with you. Medical or food-contact applications require documentation for the exact material and intended conditions of use.
LSR mold design and manufacture are coordinated with the production partner. Gate placement, venting, runner design, flash limits and drawing tolerances form part of the tooling review.
Post-curing, deflashing, marking, assembly and packaging can be included in the quotation. The agreed process defines which operations are performed and how finished parts are accepted.
If controlled packaging or sterilization compatibility is required, specify it with the RFQ so the production and testing scope can be reviewed.
FECISION helps coordinate production-site qualification for the agreed manufacturing scope.
The relevant records depend on the selected site and process. A project review can establish which of the following records are required:
FECISION coordinates LSR molding onto suitable plastic or metal substrates. The manufacturing partner reviews the material pairing, substrate heat resistance, tooling sequence and retention features before recommending insert overmolding or another suitable process.
Request A QuoteCandidate substrates include suitable engineering plastics and metals. Adhesion depends on the exact LSR and substrate grades, surface condition and molding process.
Substrate surface activation is specified based on the material pairing and validated before production release.
Overmolding can reduce assembly operations. Chemical adhesion must be confirmed with the selected grades and process; mechanical interlocks may be needed where the bond alone does not meet the requirement.
Partner production resources
Preparation matched to silicone process
Partner LSR injection equipment
Shot size and capacity reviewed per project
Partner finishing resources
Trim method matched to part geometry
Partner finishing resources
Flash acceptance defined on the drawing
Partner thermal-processing resources
Cycle specified for the selected grade
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
Medical and automotive requirements are matched to the selected partner site and its certified scope. ISO 13485, IATF 16949 and other applicable standards are reviewed alongside the actual process and material requirements.
FECISION coordinates the drawing review, silicone selection, tool design and sampling plan with the manufacturing partner. Critical dimensions and acceptance criteria are agreed before tooling begins.
The production cell and any controlled-environment operations are selected for the application. Cleanroom classification, monitoring records and packaging scope are reviewed when the project requires them.
The quotation identifies tooling milestones, sample quantities, inspection reports and any additional validation work. Lead time depends on geometry, material availability and the agreed qualification program.
Project Quality Planning
Electronics Project Review
The project review covers a connector seal and cable grommet concept. The DFM discussion focuses on undercut release, flash at the plastic interface, corner radii and shrinkage compensation.
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.
The documentation package is agreed during quotation. It can include material lot records, dimensional inspection, traceability and specified validation deliverables. IQ/OQ/PQ scope and acceptance criteria are reviewed with the selected production site when required.
Tooling and sampling dates are confirmed after the part, silicone grade, cavity count and validation requirements have been reviewed. Share your target launch date so the quotation can identify the relevant milestones.
We coordinate a review of the relevant site qualifications, manufacturing scope and project quality records. Any further document sharing or site review is arranged according to supplier authorization and the agreed confidentiality scope.
Send your trial quantity, expected annual volume and part drawing. We assess the tooling investment, material purchase, cycle and finishing requirements to recommend a practical batch size and production approach.
