Custom LSR Injection Molding & Silicone Parts Manufacturer | LSRParts
At LSRParts, we manufacture precision liquid silicone rubber (LSR) components using LSR Injection Molding that match your exact drawings and performance requirements. Our process starts with a detailed DFM review to confirm part geometry, wall thickness, sealing features, draft angles, undercuts, flash, material hardness, shrinkage, tolerances, and bonding before any tooling begins. This early collaboration identifies risks and streamlines development from prototype to stable mass production.
Your Path from DFM Review to Mass Production
We support OEMs and engineering teams with every step:
- ✓Material selection tailored to your application
- ✓Mold design and tool manufacturing
- ✓T0/T1 sampling
- ✓Validation
- ✓Production approval
- ✓Mass production
- ✓Inspection
- ✓Assembly and packaging
This structured workflow ensures your components meet dimensional consistency, sealing performance, and material reliability from the first validated part.
LSR Injection Molding Capabilities
Our LSR Injection Molding delivers production-ready parts with the following specifications:
| Parameter | LSRParts Capability |
|---|---|
| Process | Liquid Silicone Rubber Injection Molding |
| Maximum Part Envelope | 300 × 200 × 100 mm |
| 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 |
| Mold Cavities | Single-cavity / Multi-cavity |
| Production Mold Life | 3–5 million shots, tooling/application dependent |
| Mold Materials | P20 / H13 / 420 Stainless Steel |
| Tooling Type | Prototype Tooling / Production Tooling |
| Production Scale | Prototype → High-volume mass production |
| Color | Custom / Pantone matching |
| Surface | Custom texture / matte / polished |
| Automated Molding | Available |
| Secondary Operations | Post-curing, trimming, printing, laser marking, bonding, assembly, etc. |
These capabilities support applications in automotive, medical devices, electronics, pumps, valves, and fluid control systems.
LSR Overmolding Capabilities
We add LSR overmolding to plastic or metal substrates for integrated components such as seals, grips, and connectors.
| Maximum Part Envelope | 300 × 200 × 100 mm |
| LSR Hardness | 10–80 Shore A |
| Mold Tolerance | ±0.01 mm |
| Typical Part Tolerance | ±0.05 mm |
| Mold Cavities | Single / Multi-cavity |
| Mold Life | 3–5 million shots depending on tooling |
| Plastic Substrates | PC, PA, PBT, PPSU, PPA, PEI etc. |
| Metal Substrates | Aluminum, Stainless Steel, Brass, Copper |
| Bonding | Chemical / mechanical bonding strategy |
| Insert Molding | Supported |
| Typical Applications | Medical devices, connectors, seals, grips, electronics |
| Post Processing | Post-cure, trimming, printing, marking, assembly |
Compression Molding Capabilities
We provide large-format silicone rubber compression molding for high-volume parts.
| Process | Silicone Rubber Compression Molding |
| Maximum Size | 2500 × 2000 × 1000 mm |
| 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 |
| Cavities | Single / Multi-cavity |
| Mold Life | Up to 3–5 million shots, application dependent |
| Mold Materials | P20 / H13 / 420 Stainless Steel |
| Secondary Operations | Post-cure, trimming, punching, drilling, printing, bonding, assembly |
Silicone Extrusion Capabilities
We extrude custom silicone profiles, tubing, cords, strips, and multi-lumen tubing.
| Parameter | LSRParts Capability |
|---|---|
| Products | Tubing, cords, strips, custom profiles, multi-lumen tubing |
| Tubing OD | 0.5–120 mm |
| Standard Cross-Section Tolerance | ±0.05 mm |
| Precision Cross-Section Tolerance | ±0.03 mm |
| Wall Thickness | 0.3–15 mm |
| Length | Cut-to-length / Continuous coils |
| Maximum Continuous Coil | Up to 1,000 m |
| Curing | Hot air / Salt bath / Microwave / Steam |
| Surface | Smooth / Matte / Textured / Fabric impression |
| Color | Pantone / RAL matching |
| Production Volume | Prototype to 1M+ meters/year |
| Secondary Operations | Cutting, coiling, joining, marking, inspection, packaging |
Tooling Capability
| Specification | LSRParts Capability |
|---|---|
| DFM | Yes |
| CAD | SolidWorks / CAD |
| Mold Flow Review | Supported |
| CNC | 3-axis / 5-axis CNC |
| EDM | Sinker EDM / Wire EDM |
| Rapid Tooling | Aluminum tooling |
| Rapid Tool Life | Approx. 100–10,000 cycles |
| Production Tooling | Hardened steel tooling |
| Common Mold Steel | P20 / NAK80 / H13 / S136 / 420 |
| Stainless Tooling | 316 / 420 where applicable |
| Aluminum Tooling | 6061 / 7075 |
| Tool Surface Finish | Ra 0.8 μm or better where required |
| Prototype Tool Lead Time | Benchmark approx. 10–12 days |
| Production Tool Lead Time | Benchmark approx. 3–6 weeks |
| Sampling | T0 / T1 / validation |
| Multi-Cavity Tooling | Yes |
| High-Volume Tooling | Yes |
Secondary Operations
We offer a full range of post-processing services to complete your components:
✓Post-Curing
✓Precision Trimming
✓Die Cutting
✓Punching
✓X / Y Slitting
✓Valve Slitting
✓Pad Printing
✓Silk Screening
✓Laser Marking
✓Drilling
✓Bonding
✓Dipping
✓Cutting & Coiling
✓Assembly
✓Functional Testing
✓Inspection
✓Custom Packaging
Material Matrix
We stock and compound silicone materials for your specific needs:
| Material | Target Applications |
|---|---|
| General Purpose LSR | Industrial / electronics |
| Medical Grade LSR | Medical devices |
| Food Grade LSR | Food / beverage / baby |
| Platinum-Cured Silicone | Medical / food contact |
| Optical LSR | Optical / lighting |
| Fluorosilicone | Automotive / fuel / chemical exposure |
| High-Temperature Silicone | Automotive / industrial |
| Low-Temperature Silicone | Outdoor / automotive |
| Electrically Conductive Silicone | Electronics / EMI |
| Thermally Conductive Silicone | Thermal management |
| Flame-Retardant Silicone | Electrical / automotive |
| Custom Compounds | Application specific |
Ideal Customers We Serve
LSRParts works with OEMs and Tier suppliers that require custom silicone parts, tooling, and repeat production. Priority industries include:
Automotive & EV
Connector seals, wire seals, battery seals, sensor seals
Medical & Healthcare
Septa, plunger tips, valves, diaphragms, tubing, device seals
Pumps, Valves & Fluid Control
Diaphragms, membranes, check valves, sealing components
Electronics & Sensors
Waterproof seals, housing seals, keypads, overmolded parts
Food, Beverage & Baby Care
Bottle valves, breast pump parts, food-grade seals and tubing
Our Ideal Customer Profile
- ✓Custom drawings or 3D files
- ✓New tooling requirements
- ✓Annual demand above 100,000 pcs
- ✓Precision or functional requirements
- ✓Prototype-to-mass-production programs
- ✓Need for DFM and engineering support
Get an RFQ for Your Custom LSR Injection Molding Project
Ready to move your silicone component from prototype to production? Provide your 3D files, drawings, or specifications, and we will respond quickly with a tailored quote, sample availability, and confirmed lead times. Our focus on LSR Injection Molding ensures every part is built for your exact application and volume. Submit your RFQ today and start your production-ready silicone solution.
Request a Quote
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