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Custom Rubber-Plastic Overmolded Parts

Rubber-plastic overmoulding is a versatile manufacturing process that integrates the structural strength of rigid plastics with the functional properties of elastomers such as silicone or TPE. This is achieved by moulding a rubber layer directly onto a pre-formed plastic component, resulting in a unified, seamless part.

At Menhow, we apply a range of overmoulding techniques—including cold runner systems, transfer moulding, insert moulding, and 2K moulding—to suit various design, performance and cost requirements.

This approach significantly enhances both product functionality and design flexibility, offering benefits such as improved grip, sealing capability, vibration absorption, and visual appeal. It also streamlines production by removing the need for secondary assembly or adhesives, ultimately improving manufacturing efficiency and product reliability.

Customizable Materials

Plastic Types Supported

● Nylon (PA)

● Polycarbonate (PC)

● ABS

● PBT

● PMMA

● Polyphenylene Sulfide (PPS)

Rubber Types Available

● HTV/LSR

● Nitrile (NBR)

● EPDM

● Neoprene (CR)

● Viton (FKM)

● Polyurethane foam

Our Advantages

Integrated Structural and Functional Design

2K dual-shot injection moulding enables integrated soft and hard material structures in one step, enhancing product strength, appearance, and dimensional stability

Overmoulding technology achieves unified product structure, reducing assembly steps

Enhances end-product value by providing structural protection and functional benefits such as soft-touch grip, anti-slip, and scratch resistance

Excellent Material Performance and Reliability

Silicone Rubber and LSR are highly compatible with most plastics (e.g., PC, PA), ensuring stable bonding and long product life.

Offers excellent resistance to weather and chemicals: high/low temperatures, oil, UV, alcohol-based cleaners, etc.

Silicone-plastic seal structures meet IP67 or higher waterproof ratings.

Environmental Compliance and Sustainability

Use of environmentally friendly materials that comply with RoHS, REACH, and halogen-free standards, along with clean production processes

Reduced material waste and improved utilisation, supporting low-carbon and energy-saving manufacturing

Precision Manufacturing and Automation Benefits

High dimensional precision and structural integration with tolerances controlled within ±0.05 or less

Automated and energy-efficient production processes reduce manual labour and improve efficiency and consistency

Application Area

Automotive

Medical Devices

Home Appliances

Industrial Instruments

Consumer Electronics

Overmoulded in-vehicle buttons (2K dual-colour keys);

Soft-edge trim for dashboards;

Silicone sealing ring overmoulded onto ECU plastic housing (IP67 rated);

Overmoulded dust-proof rings for cigarette lighters and charging ports.

LSR overmoulded button zones on diagnostic device housings;

Integrated overmoulded seals on insulin pump housings.

Overmoulded electric toothbrush housings;

Rubber overmoulding on button areas of rice cookers and juicers;

Overmoulded buttons for power tools, soft-edge shock-absorbing casings;

Silicone sealing rings overmoulded on plastic sensor housings.

Soft-touch borders on earphone housings;

LSR-sealed waterproof rings over USB/Type-C plastic connectors.

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We are committed to providing you with the best quality service and look forward to communicating with you to solve problems together and bring you a better experience.