Liquid Silicone Rubber Overmolded Housing Part

# Liquid Silicone Rubber Overmolded Housing Part

Product of 橡楚（湖北）橡胶有限公司

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Product Overview

Liquid Silicone Rubber (LSR) overmolded housing parts are custom-engineered protective components that combine rigid substrate materials (such as engineering plastics, aluminum, or stainless steel) with biocompatible liquid silicone rubber via precision injection overmolding. As a professional manufacturer of LSR products based in 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, 橡楚（湖北）橡胶有限公司 produces these overmolded housing parts to deliver enhanced protection, ergonomic comfort, and functional performance for end-use products across industrial, consumer, medical, and electronic sectors.

Our LSR overmolded housing parts leverage the inherent advantages of LSR material: excellent thermal stability, chemical resistance, electrical insulation, and soft tactile feel, while the rigid core substrate maintains structural rigidity and dimensional stability required for load-bearing or enclosure applications. Unlike separate assembly of rigid housings and silicone gaskets or covers, our integrated overmolding process eliminates gaps between materials, reduces assembly steps for our customers, and improves overall sealing performance. All our production follows ISO 9001 quality management standards, with strict process control from raw material inspection to final product testing to ensure consistent quality for every batch.

We support full custom manufacturing based on customer 2D/3D drawings and functional requirements, with flexible production capacity that accommodates both low-volume prototype trials and mass production orders. Whether you need a water-sealed housing for outdoor electronics, a non-slip grip housing for handheld medical devices, or a impact-resistant housing for industrial sensors, our LSR overmolding solution can be tailored to meet your specific application needs.

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Technical Specifications

Material Properties

Our LSR overmolded housing parts use high-purity raw platinum-catalyzed liquid silicone rubber as standard, with the following core material properties:

Physical Performance

Finished overmolded housing parts are tested to meet the following physical performance requirements (adjustable per customer requirements):

Process Parameters

Our standard injection overmolding process is controlled to the following parameters to ensure consistent product quality:

1. LSR Injection Temperature: 120°C to 160°C
2. Curing Time: 30 seconds to 120 seconds (adjusted based on part wall thickness)
3. Injection Pressure: 5 MPa to 15 MPa
4. Substrate Pre-treatment: Plasma or physical etching treatment for improved bonding strength
5. Post-curing: 2 hours at 120°C to remove trace volatile compounds (mandatory for food and medical applications)

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Product Advantages

1. Integrated Sealing and Structural Performance

Compared to traditional assembly methods that combine rigid housings with separate silicone gaskets or covers, our overmolded process forms a seamless, gap-free bond between the LSR outer layer and rigid inner substrate. This eliminates leak paths that can form with assembled components, delivering consistent IP65 to IP67 level water and dust protection with proper design. The rigid core maintains the required dimensional stability and load-bearing capacity for the housing, while the LSR layer adds protective functions.

2. Tailored Ergonomic and Functional Performance

We can adjust the Shore hardness of the LSR layer to meet specific touch and grip requirements: soft 10-20 Shore A LSR delivers comfortable, non-slip grip for handheld devices, while harder 50-70 Shore A LSR provides enhanced abrasion resistance for high-wear applications. The LSR material also provides excellent shock and vibration absorption, reducing impact damage to sensitive internal components during use or accidental drops.

3. Long-Term Durability in Harsh Environments

Our LSR material retains its flexibility and mechanical properties after long-term exposure to extreme temperatures, UV radiation, and humid environments, with no cracking, hardening, or degradation that plagues many organic elastomers. This makes our overmolded housing parts ideal for long-term outdoor or industrial use, reducing replacement and maintenance costs for end products.

4. Cost-Effective Custom Manufacturing

As a dedicated LSR product manufacturer, we have in-house mold design and manufacturing capabilities, which reduces lead times for custom tooling. The overmolding process combines multiple components into a single part, reducing your assembly labor and component inventory costs. We can accommodate production volumes ranging from 100 prototype units to 100,000+ mass production units, with flexible order arrangements to match your project timeline.

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Applications

Liquid silicone rubber overmolded housing parts are used across a wide range of industries, common use cases include:

1. Medical Devices: Housings for handheld glucose meters, pulse oximeters, surgical hand tools, and portable patient monitors. The biocompatible LSR layer provides non-slip grip, comfortable handling, and resistance to repeated disinfection with medical-grade detergents and alcohols.
2. Consumer Electronics and Home Appliances: Waterproof housings for smart wearables, outdoor Bluetooth speakers, electric shaver handles, kitchen appliance handles, and waterproof remote controls. The LSR layer provides splash protection, impact resistance, and comfortable touch.
3. Industrial Automation and Sensors: Protective housings for outdoor pressure sensors, temperature transmitters, handheld industrial scanners, and power tool handles. The LSR layer absorbs vibration, provides insulation, and protects internal electronics from moisture and dust in harsh industrial environments.
4. Outdoor and Sports Equipment: Housings for GPS devices, waterproof flashlights, camping tool handles, and fitness equipment handles. The LSR layer provides non-slip grip even in wet conditions and resists UV degradation from long-term outdoor exposure.
5. Automotive Components: Housings for interior control knobs, sensor enclosures, and connector covers, where the LSR provides vibration damping and electrical insulation.

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Selection Guide

Hardness Selection

Choose the appropriate LSR Shore hardness based on your application requirements:

• 10 Shore A to 30 Shore A: For applications requiring maximum softness and comfort, such as handheld medical device grips and consumer product handles.
• 30 Shore A to 50 Shore A: Balances softness and abrasion resistance, ideal for general purpose sealing and impact protection for electronic housings.
• 50 Shore A to 70 Shore A: For high-wear applications requiring high structural strength, such as industrial power tool housings and outdoor equipment enclosures.

Size Specifications

We produce custom-sized overmolded housing parts based on your 2D drawings or 3D CAD models. Our current maximum molding dimension for overmolded parts is 300 mm × 200 mm × 100 mm; for larger parts, please contact our sales team to discuss feasibility. We can accommodate most custom feature requirements, including through holes, threads, undercuts, and surface texturing on the LSR layer.

Material Grade

Select the appropriate LSR material grade based on your end-use requirements:

• General Industrial Grade: For non-food, non-medical applications such as industrial sensor housings and automotive components, meets general performance requirements at a competitive cost.
• Food Contact Grade: Complies with FDA 21 CFR 177.2600 standards, suitable for kitchen appliance components, food processing equipment housings, and other applications with direct food contact.
• Medical Grade: Post-processing to meet low extractable requirements, suitable for medical devices with short-term skin contact; please note we do not produce LSR parts for implantable applications.

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Quality Assurance

At 橡楚（湖北）橡胶有限公司, all production processes follow the ISO 9001 quality management system, from raw material incoming inspection to finished product outgoing testing:

1. Raw Material Inspection: Every batch of LSR raw material is tested for hardness, tensile strength, and purity before production, and only qualified materials are used.
2. In-Process Inspection: Dimensional and appearance inspection is performed every 2 hours during production to process deviations.
3. Finished Product Testing: All finished overmolded housing parts undergo 100% appearance inspection and bonding strength testing; for waterproof housing products, we perform standardized air leak or water immersion testing per customer requirements.
4. Traceability: We maintain complete production and testing records for every batch to ensure full traceability of product quality.

We welcome customer third-party inspection for all orders, and our team will provide full technical support and after-sales service for your project.

Contact Information

橡楚（湖北）橡胶有限公司

Address: No. 54, Neihe Alley, Fankou Street, Economic Development Zone, Echeng District, Ezhou City, Hubei Province, China

Phone: +86 18071171144

Email: churubber@163.com