In the realm of Plastic Molding, the adoption of Thermoplastic Rubber components is reshaping industries seeking durable, elastic, and highly customized solutions. Among the most sought-after innovations in this field is
TPR Overmolding, which allows rigid plastic substrates to be seamlessly combined with soft-touch rubber layers. This results in enhanced grip, impact resistance, and visual appeal across numerous sectors including electronics, automotive, and medical devices. With precision-driven technology, this method supports efficient mass production while ensuring ergonomic designs tailored to user experience. Through carefully engineered interfaces between the base plastic and TPR layers, overmolding also contributes to waterproofing, shock absorption, and even acoustic insulation — making it a versatile asset for today’s complex manufacturing needs. These enhanced hybrid parts are instrumental in product categories where tactile sensation matters. Consumers today expect seamless, sleek designs with added comfort and usability, driving greater demand for dual-material manufacturing. The combination of tactile softness with internal strength has enabled developers to create more intuitive user interfaces in consumer goods. Additionally, designers gain more freedom in creating contoured or unconventional shapes without sacrificing function, broadening possibilities for innovation in handheld and industrial devices.
TPR Overmolding
Model -
Product Specifications: Aluminum/Die Casting + TPR/TPE
Product Description:
Air/Pneumatic tools Housing / Case (TPR Overmolding)
TPR Overmolding for Enhanced Grip & Shock Absorption Whether using powder-coated or liquid-painted metal housings, TPR (Thermoplastic Rubber) overmolding is an ideal solution to enhance grip comfort and reduce vibration. This improves ergonomic performance and minimizes user hand fatigue.
Unlike manual assembly, TPR overmolding enables high-speed, large-volume production while reducing the risk of slipping, cracking, or detachment. It’s especially suitable for plastic injection molding applications that demand both performance and user comfort.
Key benefits of TPR include:
Excellent abrasion resistance and deformation stability Strong electrical insulation and heat resistance Resistance to grease and harsh chemicals At Sung I Industrial, we specialize in mold development, OEM/ODM, and custom manufacturing. With full vertical integration, we work with advanced engineering plastics and sustainable materials to deliver reliable, production-ready solutions.
At the forefront of this evolution stands SUNG I INDUSTRY CORP. , a trusted Taiwanese manufacturer known for vertically integrated solutions that span from high-precision mold development to final component assembly. Since 1978, they have built a solid reputation in the global market for delivering quality and efficiency without compromise. With a seasoned team of molding experts and state-of-the-art facilities, they support both OEM and ODM clients seeking custom solutions. As a leading name among global suppliers of thermoplastic rubber injection technologies, SUNG I continues to elevate its role in sustainable manufacturing, incorporating eco-conscious materials and streamlining energy usage.
Their TPR-based product innovations are setting a new standard for performance, design, and adaptability — reinforcing Taiwan’s position as a global leader in precision plastic engineering. With decades of engineering refinement behind them, this company aligns with industries striving for low-waste production and optimized product lifecycles. Through lean manufacturing practices, they reduce overhead while maintaining consistency across large and small production runs. This reliability, combined with rapid tooling adjustment capacity, helps accelerate prototyping and minimize downtime — a key factor for competitive players in ever-evolving global markets.
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Products List
Product Specifications: PA+GF+ TPR/TPE/Cork TPE
Product Description:
Air/Pneumatic Tools Housing / Case(TPR Overmolding) / Cork Grip
Sustainable TPE Overmolding with Cork-Based Materials
In response to the growing need for sustainable manufacturing, Sung I Industrial now offers overmolding solutions using TPE blended with natural cork materials. This eco-friendly approach not only reduces the overall weight of the product but also enhances shock absorption, grip comfort, and visual appeal—making it ideal for ergonomic applications.
Unlike traditional rubber or synthetic materials, cork-infused TPE provides a warm tactile feel and a unique surface texture that helps differentiate products in the market. This innovation is especially valuable for brands seeking sustainability without sacrificing durability or functionality.
Through our expertise in plastic injection molding, mold development, and custom manufacturing, we support full OEM/ODM integration. Combined with our vertically integrated production system, we can deliver scalable solutions that use engineering plastics and sustainable materials—helping clients meet modern product demands while aligning with eco-conscious values.
Product Specifications: Aluminum Magnesium Alloy +PP+TPR/TPE
Product Description:
Air / Pneumatic Tools Handle / Grip
Overmolding Technology|Enhanced Grip & Brand Identity Through Multi-Material Integration
At Sung I Industrial, we specialize in plastic injection molding and mold development, offering fully custom manufacturing solutions that balance both functionality and aesthetics. Our advanced overmolding technology allows materials like TPR and TPE to be molded directly over metal or plastic substrates, enhancing grip, anti-slip performance, and shock absorption.
Even for metal components with a pre-applied paint or coating finish, Sung I ensures that the overmolding process will not scratch or damage the surface—maintaining a flawless appearance. We can also integrate rigid materials like PP to increase structural strength while offering a dual-layer surface design that adds visual diversity and improves product recognition. This makes it an ideal solution for ergonomically designed products such as hand tools, sporting goods, and automotive components.
With full OEM/ODM support and a vertically integrated workflow, Sung I manages every step from design, material selection, and mold fabrication to injection molding, post-processing, and final packaging—delivering high-quality, scalable overmolding solutions for today’s performance-driven markets.