ISO 9001 Certified Factory · Specializing in Compression Molding & LSR Liquid Silicone Rubber Injection Molding · Silicone Products & Special Rubber/Silicone Materials & Waterproof Seals/Anti-Vibration Pads · ISO 9001 Certified Factory · Specializing in Compression Molding & LSR Liquid Silicone Rubber Injection Molding · Silicone Products & Special Rubber/Silicone Materials & Waterproof Seals/Anti-Vibration Pads ·
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Solid Silicone Compression Molding Technology

Solid Silicone Compression Molding Technology

A traditional and mature silicone molding technology, where solid silicone raw materials are heated and vulcanized in a mold using vacuum hot pressing. It is suitable for large-volume production and offers relatively low tooling costs, making it the preferred choice for mass production.

Our core capabilities focus on pure silicone/rubber products, overmolding, plastic-to-silicone bonding, metal-to-silicone bonding, and other diverse processes. Located in Xinzhuang District, New Taipei City, our factory offers professional, one-stop OEM/ODM manufacturing services for clients throughout Taiwan.

Compression Molding Mass Production Low Tooling Cost Silicone Keypads Waterproof Seals
LSR Liquid Silicone Rubber Injection Molding Technology

LSR Liquid Silicone Rubber Injection Molding Technology

To meet the market's high precision and quality requirements, Jun-Hsiang has introduced LSR Liquid Silicone Rubber injection molding technology. LSR technology is characterized by high precision, high automation, and excellent production efficiency.

This technology effectively addresses our clients' demands for high precision and is widely applicable to medical devices, electronic components, automotive parts, and other high-accuracy applications.

LSR Liquid Silicone High Precision High Automation Medical Grade Electronic Components

LSR Technology Highlights:

  • Core Process: Dual-component automated metering and mixing injection.
  • High Precision: Micron-level precision mold venting and injection, with tolerances controlled within ±0.02mm.
  • Material Advantages: Non-toxic, resistant to extreme temperatures, complying with medical-grade (USP Class VI) and food-grade (FDA) standards.
  • Overmolding: Professional overmolding / silicone-to-metal bonding with plastics, metals, and copper parts.

LSR Injection Molding FAQ

Answers to your questions about Liquid Silicone Rubber (LSR) injection molding technology and manufacturing processes.

What is LSR Liquid Silicone Rubber injection molding?

LSR (Liquid Silicone Rubber) injection molding is an automated manufacturing process where two-part liquid silicone raw materials (Part A and Part B) are mixed precisely at a 1:1 ratio and injected into a heated mold for rapid vulcanization. It is particularly suitable for high-precision, complex-shaped medical devices, electronic components, and high-temperature resistant seals.

How does LSR injection molding differ from traditional solid silicone compression molding?

LSR injection molding utilizes a fully enclosed automated feeding system, eliminating risks of human contamination, with very short cycle times, micron-level precision, and minimal flash. Traditional compression molding requires manual weighing and placement of solid compound, leading to slower production cycles; it is more suitable for larger parts or projects with limited tooling budgets.

What are Jun-Hsiang's advantages in LSR overmolding and insert molding?

Jun-Hsiang Enterprise has over 30 years of mold development experience, achieving integrated overmolding processes such as silicone-to-aluminum, silicone-to-iron, and silicone-to-plastic bonding. Through professional surface treatment and precise mold venting design, we ensure a tight bond between the silicone and the metal/plastic substrates, preventing delamination and meeting IP68 waterproof standards.

Advanced Production & QC Equipment

We have introduced advanced automated production equipment and precision measurement instruments to guarantee stable production and high-standard quality assurance.

LSR Liquid Silicone Rubber Injection Molding Machine

LSR Liquid Silicone Rubber Injection Molding Machine

Utilizing a precision control system from leading domestic manufacturer Chuan-Lien Machinery, combined with automated metering and mixing, it is built for high-efficiency and stable injection molding of high-quality silicone rubber parts.

Vacuum Compression Molding Machine

Vacuum Compression Molding Machine

Equipped with an advanced vacuum system to eliminate bubble defects, ideal for large-scale production of silicone keypads, waterproof seals, O-rings, and overmolded parts.

2.5D Optical Measuring Projector

2.5D Optical Measuring Projector

Non-contact, high-precision 2D optical measurement, ensuring strict tolerance control for intricate features, micro-apertures, and dimensions. It serves as a core tool in our quality control.

Complete In-House Production & Quality Inspection Equipment List

⚙️ Production Equipment

  • LSR Liquid Silicone Injection Molding Machine
  • Vacuum Compression Molding Machines (Multiple Units)
  • Raw Material Mixer & Cutter
  • Three-Roll Mill
  • Post-Curing Ovens (Secondary Vulcanization)
  • Motorized Sliding Screen Printer
  • Chassis Flat Screen Printer / Mid-sized Screen Printer
  • IR Conveyor Dryer

🔬 Quality Inspection & Testing Instruments

  • 2.5D Optical Measuring Projector
  • Force-Displacement Tester
  • Silicone Rubber Keypad Lifetime Tester
  • Abrasion Resistance Tester
  • High-Precision Manual Force Gauge
  • Magnifying Scope / Microscope
  • Shore Durometer
  • Vernier Calipers / Digital Thickness Gauge

Interactive Material Selection Helper

Based on your product's operating environment, select the desired physical properties and certifications, and we will recommend the most suitable silicone or rubber material.

Step 1: Check your material property requirements (multiple selections allowed)

Step 2: Recommended materials for your application

LSR Liquid Silicone Rubber
Medical Food-Grade High Precision

Dual-component automated mixing injection. Non-toxic, odorless, anti-aging, with excellent biocompatibility. Performs perfectly under high temperature, dust-proof, transparency, and medical demands.

FVMQ Fluorosilicone
Oil & Flame Resistant Extreme Temp

Combines the solvent and oil resistance of fluorocarbon rubber with the wide temperature range of silicone. Typically used in automotive engine seals, fuel line gaskets, and the aerospace industry.

Self-adhesive / Overmolding Silicone
Overmolding Primerless

Specially modified silicone that chemically bonds directly to plastic (PC, PBT, PA) or metal surfaces during injection molding without primer, ideal for multi-material waterproof assemblies.

Food Grade Solid Silicone (FDA Solid Silicone)
FDA Compliant Compression Molding

Primarily used to manufacture silicone keypads, consumer goods, and tableware seals in direct contact with food, complying with FDA and LFGB standards.

EPDM Rubber
Weatherproof Outdoor Seal

Excellent chemical, UV, and ozone resistance. Commonly used for automotive weather stripping, outdoor electrical enclosures, and vibration-damping rubber components.

NBR / HNBR Rubber
Wear Resistant Oil Resistant

Superb resistance to mineral oils, gasoline, diesel, and high tensile strength. Excellent tear and abrasion resistance, suitable for industrial O-rings, dust boots, and oil check valves.

Interested in our technology?

We possess over 30 years of professional silicone and rubber manufacturing experience, backed by ISO 9001 certification to provide you with the most reliable tooling development and OEM/ODM services.

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