LSRParts
Custom Silicone Membranes Manufacturer
When fluid control, pressure regulation, or sealing systems fail, the entire application stops working. For OEMs and engineering teams developing pumps, valves, and sensors, the silicone membrane is often the most critical component in the assembly.
LSRParts manufactures custom silicone membranes designed for precise flex life, dimensional stability, and chemical resistance. We support your engineering team from early Design for Manufacturability (DFM) review through material selection, tooling, and high-volume mass production. Whether you need a simple flat diaphragm or a complex overmolded membrane, we build components that meet your exact functional requirements.
Precision Silicone Membranes Built for Your Application
A reliable membrane starts long before the mold is cut. Our engineering team reviews your CAD files to evaluate wall thickness, flex points, draft angles, and sealing features. By identifying potential manufacturing risks early, we give you a clear path from prototype validation to stable, repeatable mass production.
Pumps & Valves
Diaphragms for micro-pumps, check valves, and dispensing systems requiring consistent actuation and high flex life.
Medical Devices
Fluid control membranes, respiratory valves, and septa requiring biocompatibility and precision tolerances.
Automotive & EV
Pressure relief valves, sensor isolation membranes, and fluid regulation components designed for extreme temperatures and chemical exposure.
Industrial Sensors
Protective membranes for pressure sensors and transducers requiring accurate signal transfer and environmental protection.
Manufacturing Capabilities for Silicone Membranes
Depending on your membrane's geometry, tolerance requirements, and production volume, we utilize the most appropriate manufacturing method to ensure quality and cost-efficiency.
Liquid Silicone Rubber (LSR) Injection Molding
For high-volume production and complex geometries, LSR injection molding provides tight tolerances and excellent part-to-part repeatability. This process is ideal for thin-walled membranes and components requiring consistent dynamic performance.
| Parameter | LSRParts Capability |
|---|---|
| Process | Liquid Silicone Rubber Injection Molding |
| Silicone Hardness | 10–80 Shore A |
| Typical Part Tolerance | ±0.05 mm |
| Critical Tolerance | Down to ±0.02 mm (application dependent) |
| Mold Manufacturing Tolerance | ±0.01 mm |
| Part-to-Part Repeatability | Approx. ±0.1 mm (geometry dependent) |
| Production Mold Life | 3–5 million shots |
| Tooling Type | Prototype Tooling / Production Tooling |
| Production Scale | Prototype → High-volume mass production |
LSR Overmolding for Reinforced Membranes
When a membrane requires structural rigidity or needs to be integrated directly into a housing, LSR overmolding eliminates secondary assembly steps and provides a leak-proof chemical or mechanical bond. We overmold silicone onto plastic substrates (PC, PA, PBT, PPSU) and metals (Aluminum, Stainless Steel, Brass).
| Parameter | LSR Overmolding Capability |
|---|---|
| Mold Tolerance | ±0.01 mm |
| Typical Part Tolerance | ±0.05 mm |
| Plastic Substrates | PC, PA, PBT, PPSU, PPA, PEI |
| Metal Substrates | Aluminum, Stainless Steel, Brass, Copper |
| Bonding Strategy | Chemical / Mechanical bonding |
| Mold Cavities | Single / Multi-cavity |
Silicone Compression Molding
For larger membranes or lower-volume production runs where tooling costs need to be minimized, compression molding offers a practical solution.
| Parameter | Compression Molding Capability |
|---|---|
| Typical Part Tolerance | ±0.2 mm |
| Small Part Mold Cavity Tolerance | ±0.1–0.2 mm |
| Complex Part Mold Cavity Tolerance | ±0.3–0.5 mm |
| Part-to-Part Repeatability | Approx. ±0.1 mm |
| Mold Life | Up to 3–5 million shots |
Material Selection for Functional Performance
The performance of a silicone membrane depends entirely on selecting the right compound for the operating environment. We help you navigate material specifications to ensure your membrane withstands the required cycles, temperatures, and fluid exposures.
| Material | Target Applications for Membranes |
|---|---|
| General Purpose LSR | Industrial fluid control, standard pressure regulation |
| Medical Grade LSR | Medical devices, biocompatible fluid paths |
| Food Grade LSR | Beverage dispensing, food processing valves |
| Platinum-Cured Silicone | High-purity medical and food contact |
| Fluorosilicone | Automotive, fuel, and harsh chemical exposure |
| High-Temperature Silicone | High-heat industrial processes, automotive |
| Low-Temperature Silicone | Outdoor applications, extreme cold environments |
From DFM to Mass Production: Our Workflow
We focus on programs transitioning from prototype to high-volume production (typically 100,000+ pieces annually). Rapid tooling and efficient project management mean you can validate designs faster and move into mass production without delays.
DFM Review
We analyze your 3D files to optimize geometry for moldability, reducing the risk of flash, tearing, or uneven wall thickness.
Material Selection
Matching your performance criteria with the right silicone compound.
Mold Design & Tooling
In-house CNC and EDM capabilities allow us to build precision molds. Prototype tool lead times benchmark at approximately 10–12 days, helping you test physical parts sooner. Production tooling benchmarks at 3–6 weeks.
T0/T1 Sampling & Validation
First articles for your engineering team to test in the actual assembly.
Mass Production & Secondary Operations
We support post-curing, precision trimming, die cutting, slitting (X/Y and valve slitting), and final inspection to deliver a ready-to-install component.
Request a Quote for Your Custom Membranes
If you have a 3D CAD file and functional requirements for a custom silicone membrane, our engineering team is ready to review your project. We provide actionable DFM feedback and clear tooling and piece-price estimates to help you move your project forward.
Contact LSRParts today to discuss your silicone membrane requirements and receive a detailed RFQ.