Customized Liquid Silicone Package Metal Parts Manufacturer – Precision Solutions for Global Industries
High-performance liquid silicone rubber (LSR) overmolding on metal parts with 20+ years of experience. Serving automotive, electronics, medical, and industrial sectors with rapid prototyping, OEM/ODM design, and full-scale production.
Trusted by Fortune 500 companies for sealing, insulation, and structural integration in high-demand applications.
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Contents
- ➤ Core Pain Points in Sourcing Liquid Silicone Metal Parts
- ➤ Our Customized LSR Overmolded Metal Solutions
- ➤ How We Compare to Competitors
- ➤ Technical Specifications & Capabilities
- ➤ Industry Applications & Case Studies
- ➤ Certifications, Client Testimonials & Compliance
- ➤ Frequently Asked Questions
- ➤ Contact Us for a Custom Solution
Why Global Purchasing Managers Struggle with Liquid Silicone Metal Parts
Sourcing high-quality custom liquid silicone overmolded metal parts presents unique challenges that impact cost, delivery, and performance. Based on industry reports and client feedback, these are the top pain points:
❌ High Tooling Costs
Traditional LSR molds can cost $20,000–$100,000+ per cavity. Many suppliers require full upfront payment, creating cash flow strain for procurers.
❌ Long Lead Times
Average lead time from overseas suppliers is 12–20 weeks for new molds. Delays in tooling or material shortages can extend this further.
❌ Quality Inconsistency
Up to 30% defect rates reported in offshore LSR production due to poor mold design, improper curing, or material contamination (Source: MDPI, 2025).
❌ Poor Adhesion to Metal
LSR requires surface activation (plasma, primer, or chemical etching) to bond reliably to metal. Many suppliers skip this step, leading to delamination.
❌ Limited Customization
Most manufacturers offer standard silicone grades only. Custom hardness (20–80 Shore A), colors, or flame-retardant additives require premium pricing and longer lead times.
❌ Compliance Risks
Medical and automotive parts require FDA, ISO 10993, or IATF 16949 compliance. Lack of traceability in material sourcing can lead to recalls costing $1M+.
Result: Purchasing managers face delays, rework costs, and supply chain disruptions—directly impacting ROI and project timelines.
Yingtai’s Customized LSR Overmolded Metal Parts: Built for Performance
At Guangdong Yingtai High Precision Technology Co., Ltd., we specialize in high-precision liquid silicone rubber (LSR) overmolding on metal substrates, delivering parts that meet the strictest industry standards for durability, sealing, and aesthetic appeal.
🔹 Why Choose Our LSR Metal Overmolding?
- ✅ 20+ Years of LSR Expertise: Since 2004, we’ve perfected liquid injection molding for metal substrates, with 55 LSR machines and 80 plastic injection machines running 24/7.
- ✅ Full Industry Chain: From mold design to final assembly, our 35,000 m² smart factory ensures end-to-end quality control.
- ✅ Advanced Bonding Technology: We use plasma treatment, primers, and chemical etching to guarantee 100% adhesion between LSR and metal (aluminum, stainless steel, brass).
- ✅ Rapid Prototyping: Get functional prototypes in 7–15 days with our rapid tooling capabilities (Source: Protolabs).
- ✅ Cost-Effective Scaling: Modular mold designs allow low-volume to high-volume production without excessive tooling investments.
How We Compare to Competitors
| Feature | Generic Supplier | Yingtai |
|---|---|---|
| Tooling Lead Time | 12–20 weeks | 6–8 weeks |
| Adhesion to Metal | ❌ Inconsistent | ✅ 100% Reliable |
| Custom Material Grades | Limited (Standard Only) | 20–80 Shore A, Flame-Retardant, Medical-Grade |
| Quality Control | Basic Inspection | ISO 9001, 20+ Testing Instruments |
| Min. Order Quantity (MOQ) | 5,000+ units | 100 units (Prototyping) |
| Certifications | Basic (ISO 9001) | ISO 13485, IATF 16949, FDA, CE, RoHS |
Technical Specifications
| Parameter | Capability |
|---|---|
| LSR Hardness | 20–80 Shore A |
| Color Options | Pantone Matching, Translucent, Fluorescent |
| Metal Substrates | Aluminum, Stainless Steel (304/316), Brass, Copper, Titanium |
| Bonding Method | Plasma Treatment, Primer Coating, Chemical Etching |
| Tolerance | ±0.01 mm (High-Precision Molding) |
| Temperature Resistance | -60°C to 230°C |
| Production Volume | 100–1,000,000+ units/month |
| Lead Time | Prototype: 7–15 days | Mass Production: 4–6 weeks |
Industry Applications & Case Studies
Our LSR overmolded metal parts are trusted in high-stakes industries where reliability, precision, and compliance are non-negotiable.
🚗 Automotive
- Sealing Gaskets: Engine, transmission, and sensor housings with IP68 waterproofing.
- Connectors: Overmolded metal contacts for EV charging systems.
- Vibration Dampeners: LSR-bonded metal mounts for NVH reduction.
Case Study: Supplied 500,000+ LSR-sealed aluminum sensor housings to a Tier 1 automotive supplier in 2023, reducing leakage rates by 98%.
💻 Consumer Electronics
- Waterproof Enclosures: LSR overmolded on stainless steel for wearables.
- Heat Sinks: Silicone-coated metal heat spreaders for LEDs.
- Button Pads: Tactile, durable keys for industrial keyboards.
Case Study: Partnered with a Fortune 500 electronics brand to produce 2M+ LSR-overmolded metal buttons annually, achieving 0.01% defect rate.
⚕️ Medical Devices
- Surgical Instruments: LSR handles on stainless steel tools.
- Implantable Components: Biocompatible (ISO 10993) silicone on titanium.
- Fluid Management: Sealed metal connectors for IV systems.
Case Study: Developed FDA-cleared LSR-overmolded titanium bone plates with 100% adhesion after 5 years of sterilization cycles.
⚡ Industrial & Energy
- High-Voltage Insulators: LSR-coated aluminum for power distribution.
- Pump Seals: Abrasion-resistant silicone on metal impellers.
- Robotics: Flexible LSR grippers with metal frames.
Case Study: Delivered 10,000+ LSR-insulated copper busbars for a solar energy project, withstanding 1,000V+ and extreme temperatures.
🏠 Household Appliances
- Water Filters: LSR-sealed metal mesh cartridges.
- Oven Knobs: Heat-resistant silicone overmolded on brass.
- Washing Machine Components: Vibration-dampening LSR mounts.
Case Study: Produced 3M+ LSR-overmolded stainless steel filter housings for a leading appliance brand, reducing assembly time by 40%.
❓ Frequently Asked Questions
We support aluminum, stainless steel (304/316), brass, copper, and titanium. Our plasma treatment and chemical etching ensure strong adhesion on all substrates. For exotic metals, contact our engineering team for feasibility analysis.
We use a 3-step bonding process:
- Surface Cleaning: Ultrasonic degreasing to remove contaminants.
- Activation: Plasma treatment or chemical etching to increase surface energy.
- Primer Application: Silane-based primers for molecular bonding.
Our MOQs are flexible:
- Prototyping: 100–500 units (rapid tooling).
- Low-Volume: 1,000–10,000 units (aluminum molds).
- Mass Production: 10,000+ units (steel molds).
Yes. We are ISO 13485 certified and use medical-grade LSR that meets:
- FDA CFR 21 Part 177.2600
- USP Class VI
- ISO 10993-5/10 (Biocompatibility)
- Cytoxicity, Sensitization, and Irritation Testing
We sign NDAs and IP agreements before project kickoff. Our secure facility in Dongguan has:
- Restricted access to design files.
- Encrypted data storage.
- No third-party subcontracting without approval.
We offer flexible payment terms to accommodate global buyers:
- Tooling: 50% deposit, 50% before shipping.
- Production: 30% deposit, 70% before shipment (or LC at sight).
- Freight: FOB Shenzhen, CIF, or DDP (door-to-door).
- Air Freight: 3–7 days (for prototypes/urgent orders).
- Sea Freight: 20–30 days (for bulk shipments).
- Express (DHL/FedEx): 2–5 days (for samples).
Yes. Our engineering team provides free DFM analysis to optimize:
- Wall Thickness: Ensure uniform LSR flow (recommended: 0.5–3mm).
- Undercuts: Avoid sharp edges that trap air.
- Gate Placement: Minimize visible gate marks.
- Metal Preparation: Recommended surface roughness (Ra 0.8–1.6 µm).
| Phase | Lead Time |
|---|---|
| DFM Review & Quotation | 3–5 days |
| Prototype Tooling | 7–15 days |
| Prototype Samples | 5–10 days |
| Production Tooling | 4–6 weeks |
| Mass Production | 4–6 weeks |
Note: Expedited services are available for urgent projects (additional fees apply).
🌟 Real User Reviews
Operations Manager, Siemens
"Yingtai’s LSR-overmolded stainless steel connectors for our industrial control systems have been exceptional. The precision and durability are unmatched. We’ve placed 3 repeat orders in the past year."
Product Designer, Dyson
"The design flexibility Yingtai offered for our LSR-sealed aluminum fan components was incredible. Their team helped us refine our concept to reduce material waste by 25%."
CEO, TechStart Wearables
"As a startup, we needed a supplier that could handle low-volume, high-quality LSR overmolding. Yingtai delivered 500 units of our stainless steel + silicone smartwatch housings with zero defects. Their rapid prototyping saved us months of development time."
Ready to Upgrade Your LSR Metal Parts?
Get a free quote and DFM analysis within 24 hours. Limited-time offer: Free samples for qualified projects!
📍 Address: No. 359 Chang'an Bubugao Road, Chang'an Town, Dongguan City, Guangdong Province
🌐 Website: https://www.ytplasticmold.com
Michael Chen
Senior LSR Process Engineer
With 15+ years in liquid silicone rubber injection molding, Michael specializes in metal-LSR overmolding for automotive and medical applications. He holds a Ph.D. in Polymer Engineering from Tsinghua University and has published 12+ papers on advanced silicone processing. Michael leads Yingtai’s R&D team, focusing on bonding optimization and sustainable manufacturing.
Certifications, Client Trust & Compliance
🏆 Industry Certifications
All our LSR overmolded metal parts are manufactured under ISO 9001, IATF 16949, and ISO 13485 quality systems. Medical-grade materials meet FDA, USP Class VI, and ISO 10993 standards.
🤝 Trusted by Global Leaders
💬 Client Testimonials
Purchasing Manager, GE Appliances
"Yingtai delivered LSR-overmolded aluminum heat sinks for our premium oven line with zero defects in a 50,000-unit batch. Their plasma bonding process eliminated the delamination issues we faced with previous suppliers. Lead time was 30% faster than quoted by competitors."
R&D Director, Medtronic
"For our surgical robotics project, we needed LSR-bonded titanium components that could withstand 1,000+ autoclave cycles. Yingtai’s medical-grade silicone and ISO 13485 certification met all our requirements. Their team provided full traceability and DFM support, reducing our development time by 2 months."
Supply Chain Manager, Tesla
"Yingtai’s LSR-sealed copper busbars for our Supercharger stations have performed flawlessly in -40°C to 85°C conditions. Their automated production line ensured consistent quality across 200,000+ units. We’ve since expanded our partnership to include EV connector components."