Over Molding Services From China

Looking for a reliable over molding partner? As a professional digital supplier, we can help. Get your multi-material parts more easily and at a better price.

Over Molding Small Batch Production

At Formioo, we provide high-quality overmolding solutions, combining multiple materials into a single component for enhanced durability, aesthetics, and functionality. Our service is ideal for industries such as automotive, medical, electronics, and consumer products, ensuring superior bonding and precision in every part.

With our trusted network of 200+ suppliers, we offer insert molding, two-shot molding, and multi-material overmolding, supporting both rapid prototyping and large-scale production. We work with a variety of thermoplastics and elastomers, ensuring seamless adhesion and improved product performance. Our ISO 9001:2015-certified quality system guarantees strict tolerances and high consistency.

As a leading digital injection molding supplier in China, Formioo connects you with the most advanced overmolding technologies at competitive pricing. Whether you need soft-touch grips, sealed enclosures, or ergonomic enhancements, we deliver cost-effective, high-precision parts with fast turnaround times—without compromising on quality.

Our Over Molding Services

Our partner manufacturer’s over molding production specializes in combining multiple materials into durable, functional components with precision and efficiency. We support rapid prototyping and high-volume manufacturing, utilizing a wide range of thermoplastics and elastomers for enhanced performance. With advanced molding techniques and multiple surface finishing options, we deliver cost-effective, high-quality parts with fast turnaround times—all streamlined through our seamless digital manufacturing platform.

Over Molding Capabilities

Material Compatibility

Our network is capable of molding combinations of materials such as TPE, silicone, rubber, ABS, PC, and other engineering plastics, meeting various industrial and custom production needs.

Printing Accuracy

Our standard tolerance is controlled within ±0.01mm, ensuring high precision for mechanical components, electronic parts, and industrial applications.

Maximum Build Size

Our maximum molding size is up to 1000mm × 600mm × 500mm, suitable for small to medium-sized parts.

Surface Finishing Options

We support polishing, painting, sandblasting, laser engraving, and more for enhanced durability and aesthetics.

Delivery Time

Our standard over molding lead time is 5-10 days, with expedited service available for urgent projects.

Our Latest Over Molded Products We Have Manufactured

Our complete CNC aluminum service will accompany your aluminum machining project from the prototype construction to the end aluminum parts manufacturing.

Over Molding Materials

PP

Polypropylene (PP) is popular for over molding due to its robust chemical resistance, fatigue endurance, and good impact strength. Its excellent adhesion characteristics make it perfect for creating dual-material parts, such as soft-touch handles over a rigid base or integrated seals in automotive components. PP’s versatility is evident in its usage across consumer electronics, household appliances, and industrial products. The ability to bond with elastomers and other polymers enhances product durability and design flexibility. Its low density further contributes to cost savings in mass production while maintaining high performance in diverse environments.

Mill Lead Time: 3 days
Color: Natural, with options for vibrant dyes

PE

Polyethylene (PE) is a cost-effective and highly versatile material ideal for over molding. Its excellent chemical resistance, flexibility, and ease of processing allow it to bond well with other substrates. PE is frequently used to create layered components such as water-resistant casings, ergonomic grips, and protective seals in consumer products, packaging, and automotive interiors. Over molding with PE enables the production of parts that can absorb shocks and provide insulation while maintaining a smooth finish. Its low melting point also facilitates efficient cycle times in high-volume production environments.

Mill Lead Time: 2 days
Color: Translucent white, customizable shades

PS

Polystyrene (PS) offers a smooth surface finish and rigidity, making it a practical choice for over molding applications. Its ease of molding and dimensional stability ensure excellent bonding when combined with soft elastomers for ergonomic grips or decorative overlays. PS is commonly applied in consumer products, such as remote control housings, appliance shells, and packaging components that require a crisp, clean look. The material’s ability to accept various finishes and colors further enhances its appeal for creating visually attractive products that perform well under repetitive stress and environmental exposure.

Mill Lead Time: 2-3 days
Color: Glossy white, available in custom tones

ABS

ABS (Acrylonitrile Butadiene Styrene) is a versatile thermoplastic polymer produced through emulsion. Known for its excellent resistance to corrosive chemicals, it is commonly used in applications such as automotive parts, toys, and electronic housings.

ABS is easy to machine and features a relatively low melting temperature, allowing for easy molding and shaping. Its high impact resistance makes it ideal for products subject to significant stress or force. These unique properties make ABS a popular choice across various industries worldwide.

Common applications: Enclosures

PC

Polycarbonate (PC) stands out in over molding for its exceptional clarity, high impact strength, and excellent heat resistance. Its ability to bond with elastomeric overmolds allows the production of parts such as protective casings, optical components, and high-strength electronic housings. PC’s dimensional stability and flame retardant properties also make it a prime choice in automotive lighting and secure enclosures. In over molding, PC ensures a clear, high-quality finish that can meet rigorous performance standards while providing versatility in design and customization for both consumer electronics and industrial applications.

Mill Lead Time: 3-4 days
Color: Crystal clear, with tinted options

PA

Polyamide (PA), commonly known as Nylon, is favored for over molding because of its excellent mechanical properties, high impact resistance, and thermal stability. It bonds effectively with softer materials, making it ideal for applications like durable gear housings, automotive connectors, and robust consumer product components. Over molding with Nylon can produce components that require high strength and wear resistance, such as sealed bearings and protective covers. Its inherent toughness and resistance to abrasion make it an excellent choice for parts that undergo repeated stress and friction, ensuring long-lasting performance in demanding environments.

Mill Lead Time: 4 days
Color: Natural off-white with dyeing options

POM

Polyoxymethylene (POM), also known as acetal, is renowned for its high stiffness, low friction, and excellent dimensional stability. These properties make it a prime candidate for over molding applications that demand precision and durability. In automotive and consumer electronics, POM is used to create over molded gears, pump components, and switch housings, where its strong bonding with elastomer layers enhances shock absorption and ergonomic comfort. Its resistance to wear and chemicals ensures long-lasting performance, even under repetitive stress. This material is especially valued for applications that combine mechanical strength with the need for smooth, aesthetic surfaces.

Mill Lead Time: 4 days
Color: Natural, with custom pigmentation options

PEEK

PEEK is a high-performance thermoplastic prized for its exceptional strength, chemical resistance, and ability to withstand high temperatures. In over molding, PEEK is used where extreme performance is required, such as aerospace components, high-end medical devices, and advanced automotive parts. Its ability to bond with elastomeric layers enables the creation of multi-functional parts that combine rigidity with flexibility for seals and shock absorbers. Despite its higher cost, PEEK delivers unparalleled performance in critical applications that demand durability and precision under harsh conditions. Its excellent mechanical properties make it indispensable in environments where failure is not an option.

Mill Lead Time: 7 days
Color: Natural amber, with specialty coatings

PEI

Ultem (PEI) is a high-performance plastic distinguished by its excellent flame retardancy, dimensional stability, and robust mechanical properties. Its use in over molding is ideal for producing parts that require both strength and aesthetic quality, such as advanced electronic enclosures, medical device housings, and automotive components. Ultem’s compatibility with elastomer overmolds allows for the integration of soft-touch surfaces with rigid structural cores. This material stands out in environments demanding high heat resistance and chemical stability. The resulting over molded parts are both durable and visually appealing, making Ultem a top choice in high-end industrial and consumer applications.

Mill Lead Time: 7 days
Color: Natural amber with options for bright, engineered finishes

LCP

Liquid Crystal Polymer (LCP) is a unique high-performance plastic that offers exceptional chemical resistance, high strength, and low moisture absorption, making it highly suited for over molding. Its anisotropic properties enable excellent dimensional stability and precision, ideal for intricate components such as connector housings, micro-mechanical parts, and high-frequency electronics. Over molding with LCP results in parts that are lightweight yet durable, and its compatibility with elastomeric layers allows for integrated seals and ergonomic enhancements. Its superior performance in harsh environments has made it popular in both the electronics and automotive sectors, ensuring reliability in high-stress applications.

Mill Lead Time: 6 days
Color: Natural translucent, with customizable hues

PI

Polyimide (PI) is renowned for its extraordinary thermal stability and excellent mechanical properties, making it a standout choice for over molding applications in extreme environments. PI is often utilized in the aerospace and electronics industries, where it provides reliable insulation and durability under high temperatures and continuous stress. Over molding with PI can be seen in advanced circuit boards, high-temperature seals, and precision mechanical components. Its ability to maintain structural integrity under severe conditions makes it ideal for applications where performance and longevity are critical. This resilience, combined with its versatility, ensures that PI-based components meet demanding industry standards.

Mill Lead Time: 8 days
Color: Deep brown, with high-gloss finish

Finishing Options for Over Molding

Name	Applicable Materials	Colors	Can Be Applied with
Smooth Finish	Various thermoplastics, elastomers	Various thermoplastics, elastomers	Mold polishing, Hand-finishing techniques
Matte Finish	ABS, Polycarbonate, Polypropylene	Matte Black, Matte White	Sandblasting, Matte coating processes
Glossy Finish	Acrylic, ABS, PC	High-gloss, Transparent	Mold polishing, Gloss coating application
Textured Finish	ABS, Polypropylene, Polycarbonate	Custom color palette	Texturing molds, Embossing, Laser etching
Soft Touch Finish	Elastomers, TPE, TPU	Soft Neutral tones	Co-extrusion, Soft-touch over molding
Anti-Slip Finish	Polypropylene, ABS, Nylon	Standard Grey, Custom hues	Embossing, Knurling, Laser texturing
Metalized Finish	Polycarbonate, ABS, Nylon	Metallic Silver, Gold, Bronze	Vacuum metallization, PVD, Sputtering
UV Coating	ABS, Polycarbonate, Acrylic	UV Clear, Tinted	UV curing, Spraying, Dipping