LSR Injection Molding,
Engineered for Precision.
Fully automated liquid silicone rubber injection molding for complex geometries, overmolded assemblies, and medical-grade applications. Tolerances held within ±0.05mm.
Our Equipment
32 Dedicated LSR Injection Machines
A full fleet of precision injection molding machines ranging from 60T to 300T, optimized for high-volume LSR production.
60T - 100T Machines
Ideal for small-footprint precision parts such as seals, valves, and micro components.
150T - 200T Machines
Our core production tier for pet product bowls, mats, bottles, and multi-cavity tooling.
250T - 300T Machines
Large-cavity molding for oversized trays, bulk tooling, and complex overmolded assemblies.
Material Handling
Fully Automated Feeding & Mixing System
Our closed-loop metering pumps blend Component A and Component B at precise 1:1 ratios directly from drum to nozzle -- eliminating air exposure, contamination, and manual variation.
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Closed-Loop Metering
Sealed drum-to-barrel system ensures zero contamination throughout the feeding cycle.
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Precision 1:1 Ratio Control
Static mixer blends A/B components within ±1% tolerance for consistent cure behavior.
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Integrated Color Dosing
In-line pigment pumps allow Pantone-matched colors without compromising cycle time.
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Real-Time Flow Monitoring
Sensors detect pressure anomalies and auto-shutdown on out-of-spec conditions.
Production Workflow
The Liquid Injection Molding Process
A six-stage closed cycle delivering repeatability, cleanliness, and short cycle times for high-volume LSR production.
Material Preparation
Two-component LSR drums loaded onto automated metering pumps and pre-conditioned.
Dynamic Mixing
Static mixer combines A/B compounds at 1:1 ratio with optional pigment injection.
Cold-Runner Injection
LSR injected into chilled runners, filling heated cavities with zero waste.
Thermal Curing
Mold heated to 170-200°C triggers rapid platinum-catalyzed vulcanization.
Robotic Demolding
6-axis robot extracts cured parts, places onto conveyor for inspection.
Inline QC & Packing
Vision inspection validates every part before auto-packaging for shipment.
Mold Engineering
High-Precision LSR Mold Technology
Our in-house tool shop specializes in cold-runner LSR molds engineered for zero flash, balanced flow, and multi-cavity consistency -- the foundation of reliable high-volume production.
Cold-Runner Systems
Eliminates runner waste and enables fully automatic operation with balanced cavity filling.
Precision CNC & EDM
5-axis CNC machining and wire EDM deliver mirror-polished cavities for optical-grade surface finish.
Mold Flow Simulation
Moldflow analysis prior to steel-cutting identifies risks and optimizes gate placement.
Vacuum-Assist Venting
Air evacuation ensures void-free, bubble-free parts even in deep-cavity geometries.
Design Freedom
Manufacturing Complex Structures With Confidence
LSR's low viscosity flows into geometries that compression molding simply cannot reach.
Thin Walls
Reliable molding down to 0.2mm wall thickness with uniform cure.
Micro Features
Fine ribs, pins, and lenses as small as 0.1mm with sharp detail.
Undercuts & Threads
LSR's elasticity enables direct demolding of complex undercuts.
3D Geometries
Deep draw, hollow cores, and multi-plane features in a single shot.
Hardness Range: 10A - 80A Shore
From ultra-soft gel-feel baby products to firm structural seals, we tune formulation and tooling to the exact tactile and mechanical requirement of your end-use application.
Automation
Full Automation. High Consistency. Zero Variation.
Every LSR cell operates lights-out with 6-axis robots, vision systems, and SPC-monitored machines -- delivering part-to-part repeatability that manual processes cannot match.
Overmolding
LSR Overmolding on Plastic & Metal
Bond LSR directly onto PBT, PA, PC, PP, aluminum, or stainless steel in a single-shot or two-shot molding cycle.
LSR + Engineering Plastic
Chemical bonding with PBT, PA66, PC, PPS for soft-grip handles and sealed enclosures.
LSR + Metal Insert
Primer-assisted bonding onto aluminum, stainless, and brass for sealing and vibration damping.
Two-Shot LSR + LSR
Dual-durometer or dual-color molding in a single machine cycle for premium tactile products.
Quality Control
In-Line Quality at Every Stage
ISO 9001-based quality systems with full material traceability from drum lot to finished unit.
Incoming Material
Each LSR drum verified by COA, viscosity, and durometer sampling before release to production.
In-Process SPC
Real-time monitoring of injection pressure, cavity temperature, and cycle variance.
Vision Inspection
AI vision systems inspect 100% of parts for flash, voids, bubbles, and dimensional accuracy.
Final AQL Audit
Pre-shipment AQL 1.0/1.5 inspection with full documentation and sample retention.
Project Fit Check
Is LSR Injection Right for Your Project?
Not every silicone part is a fit for LSR. Here's how to evaluate.
Choose LSR When
- +Annual volume exceeds 50,000 units
- +Dimensional precision is critical (±0.05-0.1mm)
- +Part has complex 3D or undercut geometry
- +Medical, food, or baby-contact application
- +Zero-flash, flashless cosmetic finish required
- +Overmolding onto plastic or metal insert
Consider HCR/Compression When
- --Low volume prototype or short run (< 10K units)
- --Very large flat or sheet-like parts
- --Simple geometry with wide tolerances
- --Cost sensitivity outweighs cycle speed
- --High-hardness (>80A Shore) applications
- --Specialty color masterbatch requirements
Not sure which process is best for your product?
Send us your drawing or sample. Our engineering team will respond within 24 hours with a free DFM analysis and recommendation.
Get Free DFM ReviewCase Studies
LSR Products in Production
A snapshot of recent LSR projects delivered to pet, baby, and consumer brands worldwide.
Foldable Travel Water Bottle
Multi-cavity LSR mold producing collapsible silicone bowl portion for a US brand. 200K/month.
Medical-Grade Pacifier
8-cavity cold runner mold for ultra-soft one-piece pacifier. EU LFGB certified for infant use.
Overmolded Grooming Brush
LSR bristles directly bonded onto PP handle in two-shot cycle. 1.2M units/year.
Slow Feeder Lick Mat
Complex 3D maze pattern with suction base, molded in a single LSR shot. Food-grade.
Smart Collar Soft Band
Hypoallergenic LSR band overmolded with electronic housing for pet tracker brand.
500+ LSR Projects Delivered
From concept validation to steady-state mass production. NDA-protected brands include Fortune 500 pet, baby, and consumer electronics companies.
Launch your LSR project with YMS.
Share your drawing, sample, or product idea. We'll return a full DFM feasibility report, mold quotation, and unit pricing within one business day.
What to Include in Your Inquiry
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2D / 3D Drawing or SampleSTEP, STL, IGS, or physical reference accepted.
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Target Hardness & Material GradeShore A range, FDA/LFGB/medical requirements.
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Estimated Annual VolumeHelps us recommend cavity count and tooling class.
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Target Market & CertificationsUS, EU, JP compliance paths differ for LSR products.