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Manufacturing Insight: Liquid Silicone Rubber Molding Machine
Precision Liquid Silicone Rubber Molding Solutions for Demanding Applications
Liquid silicone rubber (LSR) molding delivers exceptional performance for medical devices, automotive seals, and consumer electronics requiring biocompatibility, thermal stability, and long-term resilience. Achieving consistent part quality demands advanced material science expertise, precision-engineered tooling, and tightly controlled injection processes to manage LSR’s unique flow characteristics and vulcanization requirements. At Honyo Prototype, we integrate Rapid Tooling and high-precision LSR injection molding to transform complex designs into fully functional, production-ready components without compromise.
Our end-to-end service begins with Rapid Tooling using premium aluminum or stainless steel molds, fabricated in-house to achieve tight tolerances (±0.05mm) and surface finishes critical for medical-grade biocompatibility. This accelerates development cycles from weeks to days while maintaining repeatability for low-to-mid volume production. Coupled with our 50-300 ton LSR molding presses featuring closed-loop process control, we ensure minimal flash, zero material waste, and strict adherence to ISO 13485 standards for regulated industries. Every project leverages our engineers’ deep material science knowledge to optimize gate design, cure cycles, and part ejection—eliminating common defects like incomplete filling or post-mold shrinkage.
Accelerate your path to validation with Honyo’s Online Instant Quote platform. Upload CAD files to receive detailed manufacturability feedback, lead time estimates, and competitive pricing within hours—not days—enabling faster iteration and procurement decisions. For mission-critical LSR components where performance and speed are non-negotiable, Honyo Prototype delivers engineered excellence from concept to certified production.
Request Your Instant Quote Today: www.honyoprototype.com/lsr-quote
Technical Capabilities
Liquid Silicone Rubber (LSR) molding machines are precision-engineered systems designed for high-volume, consistent production of silicone parts using steel or aluminum molds. These machines utilize a two-part liquid silicone injection process, which cures under heat and pressure to produce durable, high-precision components. At Honyo Prototype, we specialize in rapid tooling and prototyping, delivering T1 samples within 7 days using optimized LSR molding workflows.
Our technical capabilities support mold fabrication from aluminum (for rapid prototyping and low-to-medium volumes) and steel (for high-volume, long-life production). The LSR molding process is compatible with overmolding onto rigid substrates such as ABS and nylon, enabling the creation of soft-touch, biocompatible, or sealing components.
Key technical specifications for our LSR molding machine and mold materials are outlined below:
| Parameter | Specification |
|---|---|
| Machine Type | Horizontal, Clamping Hydraulic or Hybrid Injection |
| Injection Unit | Twin-Barrel Metering System for A/B Components |
| Shot Weight Range | 10g – 500g (adjustable based on part size) |
| Clamping Force | 50 to 300 tons (selected per mold size and projection area) |
| Injection Pressure | Up to 2,000 bar |
| Melt Temperature Control | 30°C – 40°C (cold runner), 150°C – 200°C (barrel zones) |
| Mold Temperature | 150°C – 200°C (electrically heated platens) |
| Cycle Time | 30 – 90 seconds (depending on part thickness and cure requirements) |
| Mold Materials | Aluminum (7075-T6, 6061-T6), Tool Steel (P20, H13, S136) |
| Mold Surface Finishes | As-machined, polished (SPI finishes up to A1), texture (MT), coating (optional DLC) |
| Part Materials | Liquid Silicone Rubber (LSR) – Platinum Cure, Medical Grade, High Consistency Options |
| Overmolding Compatibility | ABS, Nylon (PA6, PA66), Polycarbonate, PBT |
| T1 Sample Lead Time | 7 days from mold design approval (includes mold fabrication, machine setup, and first-article sample) |
| Accuracy (LSR Parts) | ±0.1 mm for dimensions up to 100 mm; ±0.15% for larger features |
| Production Environment | Cleanroom Class 8 (ISO 14644-1) available for medical applications |
We leverage CNC machining and EDM for precise mold cavity creation, ensuring tight tolerances and excellent surface replication. Aluminum molds are typically used for prototyping and runs up to 50,000 cycles, while steel molds support production volumes exceeding 500,000 cycles. All molds are designed with optimized cooling channels and venting to minimize cure time and prevent defects.
For overmolded components, we support insert molding and two-shot processes, bonding LSR to engineered thermoplastics like ABS and nylon with strong adhesion through material-specific primers and mold treatments.
This integrated approach enables rapid validation of design functionality and accelerates time to market for medical, automotive, and consumer electronics applications.
From CAD to Part: The Process
Honyo Prototype delivers end-to-end liquid silicone rubber (LSR) molding services through a rigorously controlled digital workflow designed for precision, speed, and manufacturability. This process eliminates traditional quoting delays and integrates engineering validation before production begins. Note that Honyo provides LSR prototyping and low-volume production services; we do not sell standalone molding machines.
CAD Upload
Clients initiate the process by uploading 3D CAD files (STEP, IGES, or native formats) via our secure customer portal. The system automatically validates file integrity, checks for common geometry errors, and assigns a unique project ID. All data undergoes immediate encryption per ISO 27001 standards, with access restricted to authorized engineering personnel only.
AI-Powered Quoting
Our proprietary AI engine analyzes the CAD geometry against real-time parameters including material costs (medical-grade, high-consistency, or fluorosilicone options), machine availability, tooling complexity, and labor rates. The algorithm factors in LSR-specific variables such as cure kinetics, flash control requirements, and secondary operations (e.g., bonding, assembly). Within 90 minutes, clients receive a detailed quote with cost breakdown, lead time projection, and material certification options—without requiring manual engineering intervention.
Digital DFM Analysis
Before tooling fabrication, every design undergoes automated and engineer-reviewed Design for Manufacturability (DFM) analysis focused on LSR physics. The system checks critical parameters: wall thickness uniformity (minimum 0.5mm), gate location optimization to prevent weld lines, vent placement for air evacuation, and parting line validation. Engineers provide actionable feedback within 24 hours, including recommendations for draft angles, undercuts, and tolerance adjustments per ISO 3302-1 standards. Clients approve or iterate via the portal.
Precision Production
Approved designs move to production using dedicated LSR molding cells. Key stages include:
Tool Fabrication: Steel or aluminum molds CNC-machined to ±0.025mm tolerances, with conformal cooling channels for thermal management.
Material Preparation: Automated metering/mixing of A/B components under vacuum degassing.
Molding Process: 80-300 ton hydraulic presses with closed-loop injection control, operating at 140-200°C mold temperatures. Real-time pressure sensors monitor cavity filling.
Post-Processing: Flash removal via cryogenic tumbling or laser trimming, followed by 4-hour post-cure at 200°C to stabilize properties.
All critical process parameters (injection speed, cure time, material viscosity) are logged for full traceability.
Validation and Delivery
Every batch undergoes first-article inspection against AS9102 standards, including:
Dimensional verification via CMM (reported in PPAP Level 3 format)
Hardness testing (Shore A 10-80) per ASTM D2240
Visual inspection for surface defects under 10x magnification
Final packaging includes anti-static shielding for electronic components and serialized lot tracking. Standard delivery is 15 business days from CAD approval; expedited options available. All shipments include material certificates, process validation reports, and RoHS/REACH compliance documentation.
This integrated workflow reduces time-to-prototype by 40% compared to conventional methods while ensuring LSR parts meet stringent automotive (ISO/TS 16949), medical (ISO 13485), and aerospace requirements. Clients retain full visibility through our portal with real-time production milestones and quality data access.
Start Your Project
Interested in high-performance liquid silicone rubber molding machines? Contact Susan Leo today at [email protected] to discuss your production needs.
Our advanced manufacturing facility is located in Shenzhen, China, ensuring precision engineering and fast turnaround for your LSR molding projects.
Get a quote or schedule a consultation with our technical team to learn how we can support your manufacturing goals.
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