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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Custom Silicone OEM Manufacturer in Taiwan｜From CAD to Mass Production

Specializing in LSR Liquid Silicone Rubber Injection, Solid Compression Molding, and Silicone Overmolding (Silicone-to-Metal / Plastic Bonding). Full engineering support from 2D/3D CAD review and quotation, in-house mold making to T1 sampling and mass production.

🔒 Mutual NDA Protected ISO 9001:2015 Certified 30+ Years Tooling & Molding Expertise
Submit Drawings for RFQ (STP / IGS / DWG / PDF) Email Engineering: jojo.li888@msa.hinet.net
💡 Jun-Hsiang Silicone OEM Manufacturing Overview (Executive Summary)

Jun-Hsiang Enterprise is an ISO 9001 certified custom silicone OEM manufacturer based in Taiwan with over 30 years of tooling and manufacturing experience. We provide LSR liquid silicone injection molding, solid silicone vacuum compression molding, self-lubricating silicone molding, and silicone overmolding (silicone-to-metal and plastic bonding). Serving medical devices, electronics, automotive connectors, and industrial precision damping components with one-stop custom mold making to high-volume production.

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 - Jun-Hsiang Enterprise OEM Factory, Xinzhuang, New Taipei

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 strict dimensional tolerance control based on product design.
  • 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.
Process Comparison

Silicone Molding Process Selection Matrix

Based on your dimensional tolerance requirements, annual production volume, tooling budget, and assembly structure, our engineers recommend the optimal manufacturing process.

Evaluation Metric Solid Compression Molding LSR Liquid Injection Molding Silicone Overmolding
Raw Material State Solid compounded slabs / pre-forms Two-part liquid (Part A/B 1:1 ratio) Liquid LSR or modified self-adhesive silicone
Tooling Investment Cost-effective, lower initial NRE Precision runner tooling, higher initial NRE Custom fixtures & anti-flash tooling required
Production Volume Low to medium batch, flexible runs Medium to high volume, rapid cycle times Small-batch prototypes to high-volume assembly
Tolerance & Flash Standard industrial tolerances, manual trimming Micron-level cavity precision, minimal flash High substrate alignment precision, tight seal
Typical Applications Keypads, O-rings, vibration dampeners, gaskets Medical masks, micro-valves, auto harness seals Silicone-to-metal inserts, plastic waterproof housings
OEM / ODM Workflow SOP

Standard 7-Step Custom Tooling & OEM Process

From 2D/3D CAD quotation and in-house mold making to T1 sample inspection, we enforce rigorous SOP. Mass production starts strictly upon customer sign-off.

01 CAD & NDA

CAD Review & Mutual NDA

Accepting .STEP, .IGES, .DWG, and .PDF formats. Mutual NDAs are executed prior to proprietary drawing review to safeguard your intellectual property.

02 Material Selection

Material Formulation & Hardness

Recommending optimal Shore A hardness and compounds (self-lubricating, high-temp silicone, fluorosilicone, EPDM/NBR) tailored to your operational environment.

03 Mold Design

Mold Design: Parting Line & Venting

Evaluating parting lines, draft angles, venting grooves, and wall thickness uniformity to eliminate shrinkage voids, air traps, and tear risks early in design.

04 Tooling Fabrication

In-House Precision Tooling

In-house steel mold making with high-precision CNC / EDM cavity machining. Tight tolerance control ensures runner balance, anti-flash boundaries, and desired textures.

05 T1 Sampling & QC

T1 Sampling & 2.5D Dimension QC

Producing first-article T1 prototype parts. QC engineers perform 2.5D optical non-contact dimension verification, flash inspection, and durometer hardness testing.

06 Approval & Sign-off

Client Fit Validation & Sign-Off

Physical samples are dispatched for customer fit-and-function validation. Tooling fine-tuning is performed promptly if needed to secure final engineering approval.

07 Mass Production

ISO 9001 Mass Production & Delivery

Executed under ISO 9001:2015 standards, including in-process patrol inspections, post-curing baking, final lot sampling, and secure packaging for global shipment.

Email Drawings for RFQ
Equipment Gallery

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

  • High-Capacity Large Shot Weight LSR Injection Molding Machine & Bulk Dosing System (Heavy-Duty / Thick-Wall)
  • Precision 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
Industries & Applications

Proven Silicone OEM Expertise Across Critical Industries

Tailored material formulations and precision tooling solutions engineered to meet demanding environmental resistance, mechanical stress, and international regulatory standards.

📱

Consumer & Industrial Electronics

Precision waterproof seals, conductive keypads, acoustic ear tips, and micro-cushioning enclosure gaskets.

Processes: LSR Liquid Injection · Overmolding
🩺

Medical Devices & Healthcare

Respiratory mask silicone cushions, self-lubricating syringe plunger seals, and fluidic manifold connectors.

Compliance: USP Class VI · Biocompatible Compounds
🚗

Automotive Harness & Powertrain

Self-lubricating wire harness grommets, weatherproof cable boots, and oil-resistant powertrain O-rings.

Features: Oil & Thermal Resistance · Low-Friction Bleed-Out
🛸

UAV Drones & Robotics

Gimbal vibration isolation damping balls, landing gear bumpers, and outdoor IP-rated sealing grommets.

Features: High Tear Strength · Wide Operational Temperature
⚡

Semiconductor & Vacuum Systems

High-vacuum chamber fluorosilicone seals (FVMQ), plasma-resistant gaskets, and wafer carrier cushions.

Features: Low Outgassing · Chemical & Acid Resistance
🥣

Food-Grade & Consumer Kitchenware

Thermos bottle airtight gaskets, food-grade baking utensils, infant straws, and teether components.

Certifications: FDA 21 CFR 177.2600 · LFGB Compliant
🖥️

AI Servers & Liquid Cooling Systems

Liquid cooling quick-disconnect O-rings, cold plate sealing gaskets, and high-power module insulating pads.

Features: Coolant Compatibility · Low Compression Set
🏭

Industrial Machinery & Fluid Control

Pneumatic & hydraulic valve seals, heavy-duty anti-vibration mountings, pump diaphragms, and protective boots.

Features: High Abrasion Resistance · Rubber-to-Metal Bonding
Material Helper

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

Self-Lubricating Silicone (Bleed-out Rubber)
Self-Lubricating No Grease Low Friction

Formulated with internal phenyl silicone oil that slowly bleeds to the surface after curing to form a thin lubricating film. Eliminates external grease, designed for automotive wire seals and medical stoppers.

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.

OEM / ODM FAQ

Custom Silicone OEM & Tooling Manufacturing FAQ

Key answers for procurement managers and mechanical engineers evaluating silicone OEM factories, mold prototyping, MOQ, and material certifications.

Q1: What CAD drawing formats are required for silicone tooling evaluation?

We support standard 2D and 3D engineering CAD formats, including STEP (.step / .stp), IGES (.iges / .igs), AutoCAD (.dwg / .dxf), and engineering PDF drawings. If you only have physical samples, we can also perform reverse engineering measurements and technical evaluation.

Q2: Do you support low-volume prototyping? What is your Minimum Order Quantity (MOQ)?

Yes. Jun-Hsiang provides flexible prototyping and pilot-run options, from prototype tooling trials and pilot validation runs to high-volume automated mass production. Specific MOQ depends on part geometry, material grade, and cavity layout. Contact us directly for a case-by-case assessment.

Q3: How long does tooling fabrication and T1 sampling typically take?

Tooling lead time and T1 sampling schedule depend on structural complexity, undercut features, and number of mold cavities. Upon receiving complete drawings and confirming the tooling order, our engineering team provides a milestone timeline to keep your project on schedule.

Q4: How do you ensure strong adhesion in silicone-to-metal or overmolding parts?

Bonding strength relies on substrate pre-treatment, primer formulation, mold preheat temperatures, and precision anti-flash parting lines. With over 30 years of tooling experience, Jun-Hsiang applies dedicated positioning fixtures and molding parameter controls for aluminum, stainless steel, iron, or engineering plastics to prevent delamination.

Q5: Can Jun-Hsiang execute a Non-Disclosure Agreement (NDA)?

Yes. We prioritize client patent and design confidentiality. Prior to receiving 2D/3D CAD drawings or initiating project consultations, we readily sign a Mutual Non-Disclosure Agreement (NDA) to protect your proprietary intellectual property.

Q6: What regulatory and compliance certifications do your materials meet?

Jun-Hsiang is ISO 9001:2015 certified. Depending on your project requirements, we source and mold materials compliant with FDA 21 CFR 177.2600 food-grade standards, European LFGB, USP Class VI medical biocompatibility, RoHS, and REACH regulations, accompanied by material test reports and certificates of analysis.

Start Your Project

Launch Your Silicone OEM Project | Submit Drawings for a Prompt Engineering Response

Accepting 2D / 3D CAD files (.STEP, .STP, .IGS, .DWG, .PDF). Mutual NDA executed prior to file review to safeguard your intellectual property.

Submit Drawings for RFQ Call: +886-2-2203-9918 Email RFQ Directly