This product is formed by liquid silicone rubber overmolding process, combines the strength advantage of plastic skeleton, has excellent sealing protection performance, is resistant to aging and high-low temperature, adapts to various industrial and electronic scenarios, and can be customized for size and hardness with good fit and easy installation.
Material
Industrial LSR
Hardness
Shore A 30-70
Temperature
Certifications
Applications
-40°C ~ +150°C
Colors
Black, White, Gray, Customizable
# Plastic Skeleton Overmolded Silicone Protective Sleeve
*Liquid Silicone Rubber (LSR) Precision Overmolded Protection Solution*
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Plastic Skeleton Overmolded Silicone Protective Sleeve is a high-performance integrated protection component manufactured through precision LSR (Liquid Silicone Rubber) injection overmolding technology, combining the structural rigidity of engineering plastic skeleton and the excellent sealing, buffering and insulation performance of medical-grade or industrial-grade silicone. This product solves the pain points of traditional separate assembly protection sleeves, such as easy falling off, poor sealing and low production efficiency, and realizes one-time molding of integrated structure, providing stable and long-term protection for wires, cables, pipes, connectors and sensitive electronic components in harsh application environments.
This product leverages our 15+ years of expertise in LSR overmolding: we use chemically bonded interfaces between silicone and plastic skeleton (including PP, PA66, PBT, PC and other common engineering plastics) to avoid delamination under extreme temperature and mechanical vibration, and can customize shape, hardness, size and performance according to specific application scenarios. Core selling points include high bonding strength, IP67-level dustproof and waterproof protection, wide temperature resistance range, food/medical-grade material compliance, and mass production consistency.
Our overmolding process strictly controls the following key parameters to ensure consistent product quality:
Compared with post-assembled silicone protection sleeves, our overmolding process realizes physical occlusion and chemical bonding between silicone and plastic skeleton at the same time. The bonding interface can resist long-term vibration, extreme temperature change and oil erosion, completely avoid the problem of silicone sleeve falling off or shifting that often occurs in assembled products, and improve the overall service life of components by more than 3 times.
We support customized adjustment of silicone hardness, skeleton material, product shape and functional performance. Customers can choose food-grade materials for food equipment, medical-grade materials that meet biocompatibility requirements for medical devices, and oil-resistant and flame-retardant materials for industrial automotive scenarios. All materials comply with international environmental protection and safety standards.
The dense LSR layer has natural water and air tightness, which can easily achieve IP67-level protection, blocking dust, moisture, water splashing and chemical corrosion from the outside. At the same time, the elastic silicone material can absorb instantaneous impact and continuous vibration, effectively protect internal wires, connectors and sensitive components, and reduce failure rate caused by mechanical stress.
The one-time injection overmolding process eliminates the manual assembly process required for separate protection sleeves, reduces the size error caused by manual operation, and achieves stable dimensional tolerance control within ±0.05mm for mass production. While improving product qualification rate, it helps customers reduce assembly labor costs and after-sales maintenance costs.
Used for wire harness protection at chassis, door connections, engine compartment and battery system of new energy vehicles and traditional fuel vehicles. It protects wire connectors from mud, water, oil and high temperature, absorbs vibration generated during vehicle driving, and avoids wire abrasion and connector loosening. It can also be used as a protection sleeve for temperature sensors and pressure sensors on automotive pipelines.
Used for the handle protection of surgical instruments, the connecting part protection of portable ultrasound probes, infusion equipment pipes, and rehabilitation equipment. The medical-grade LSR meets biocompatibility requirements, can withstand repeated high-temperature sterilization (autoclave, ethylene oxide), has non-slip handfeel, and can buffer the impact between the device and surrounding objects.
Used for charging interface protection of outdoor mobile power supplies, connector protection of wearable devices, cable outlet protection of industrial control panels, and sealing protection of outdoor communication equipment connectors. It provides insulation, dustproof and waterproof performance, improves the water resistance of the whole device, and extends the service life of electronic components in harsh outdoor environments.
Used for pipeline connection protection of food processing equipment, sealing sleeve of beverage dispensing machines, handle protection of kitchen appliances. It meets FDA food contact standards, is non-toxic and tasteless, can resist repeated cleaning with food-grade detergents and high-temperature steam, does not precipitate harmful substances, and maintains soft elasticity after long-term use.
Used for power cord outlet protection of small home appliances, buffer protective sleeve of electric tool connecting parts, and sealing protection of pneumatic pipeline joints. It has good insulation and wear resistance, reduces noise generated by vibration, and prevents electric leakage and pipeline abrasion.
We support full customization according to customer-provided skeleton drawings or 3D models. Conventional inner diameter range is 2mm~100mm, outer diameter range is 4mm~120mm, length can be customized from 5mm~500mm. For special large-size or complex shape products, our engineering team will carry out molding feasibility evaluation free of charge, and provide optimized design suggestions to ensure the bonding effect and dimensional accuracy.
Our production process follows ISO 9001:2015 quality management system, and each batch of products has complete raw material traceability: all LSR and plastic skeleton raw materials are purchased from international first-tier suppliers (Dow Corning, Wacker, Shin-Etsu), and we retain raw material factory inspection reports for each batch. We implement full inspection of product appearance, dimensional tolerance and bonding strength before delivery, and carry out sampling tests for waterproof performance and hardness according to customer requirements.
Our products have obtained multiple authoritative certifications: all products comply with RoHS 2.0 and REACH regulations, food-grade products pass FDA food contact certification, medical-grade products pass ISO 10993 biocompatibility certification, and automotive-grade products meet IATF 16949 automotive quality management system requirements. If customers need third-party testing, we can cooperate with designated institutions to complete testing according to requirements.
We provide 12-month quality guarantee for mass products. If there is any quality problem that meets the contract specifications within the guarantee period, we will provide free replacement or return service. Our engineering team provides free pre-sales design consultation and after-sales technical support to help customers optimize product matching for specific application scenarios.
