Over-Molding at Yomura

Learn about Yomura's expertise in over-molding and the advantages of this precision manufacturing process in creating high-quality, durable products.

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Over-Molding Process

What is Over-molding?

Over-molding is a precision manufacturing process in which one material is molded over another material, typically rubber or thermoplastic elastomer (TPE) over plastic. This process is often employed when the design requires a "soft touch" or waterproofing (IP68) feature.

Insert Molding

Insert molding can also be combined with over-molding, incorporating materials such as aluminum, brass, stainless steel, copper, plastic, and more.

International Protection Rating IP-68

IP-68 is the most rigorous Ingress Protection classification for water and dust protection. Products rated IP-68 have undergone stringent testing in certified laboratories, proving their ability to provide complete protection against long-term submersion under water.

Materials

TPE Materials

Over-molding of thermoplastic elastomers (TPEs) is a specialized process, and our TPE materials are carefully formulated to bond with a variety of thermoplastics.

Materia Compatibility
  • PC/ABS, PC/PETG, Acetal (POM)
  • Copolyester, Polystyrene (PS)
  • Polycarbonate (PC), Polyphenylene oxide (PPO)
  • High Impact Polystyrene (HIPS)
  • Acrylonitrile Butadiene Styrene (ABS)
  • Standard and Modified Nylon 6, Nylon 6/6, Nylon 6,6,6

Material Reference Charts

OVER INJECTION MOLDING
2-Shot Overmolding Thermoplastics/Elastollan TPU without Plasma - Treatment
OVER INJECTION MOLDING
2-Shot Overmolding Thermoplastics / Elastollan TPU after Plasma - Treatment
OVER INJECTION MOLDING
Matrix of Bonding Thermoplastics-Elastollan TPU from BASF Corporation
OVER INJECTION MOLDING
Elastollan TPU Bonding Study
OVER INJECTION MOLDING
Elastollan TPU Weld-line Bond Strength Study
OVER INJECTION MOLDING
Elastollan TPU Weld-line Bond Strength Study

Advantages

Easy to Grip, Soft Touch Feeling

Over-molded TPE surfaces provide a comfortable and ergonomic grip with a soft-touch sensation.

Flexibility and Hinge Capabilities

TPE over-molding allows for flexible components, making it suitable for hinges and other dynamic applications.

Expanded Design Versatility

The integration of multiple materials through over-molding enables greater design flexibility.

Applications

Handheld Portable Housings

Over-molded products are used in hand-held device housings for enhanced durability and a comfortable grip.

Medical and Industrial Parts

Over-molded components are vital in medical equipment and various industrial applications to ensure reliable performance.

Sports and Leisure Equipment

Over-molded parts are utilized in sports and leisure equipment for enhanced durability and impact resistance.

 

Drop Protection and Shock Absorption

Impact Resistance

Over-molded TPE enhances impact resistance and shock absorption capabilities, ensuring product durability.

Reduced Part Size

Over-molding eliminates the need for additional assemblies, contributing to smaller and lighter end-products.

Reduced Assembly Time and Cost

Streamlined Manufacturing Process

Over-molding simplifies the manufacturing process, reducing assembly time and associated costs.

Improved Product Accuracy

The precision of the over-molding process ensures precise alignment and reliable performance of the finished product.

Yomura's Expertise

Extensive Knowledge

Yomura leverages extensive knowledge of material compatibility and over-molding techniques to deliver high-quality, durable, and functional products tailored to specific requirements.

Exceptional Design Integration

Our expertise ensures the successful integration of materials and strong end-application bonds for optimal product performance.

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Gallery

Overmolding Parts from YOMURA
Overmolding Products from YOMURA
YOMURA Overmolding Product Design
YOMURA Overmolding Examples
YOMURA Overmolding Products
YOMURA Overmolding Products
YOMURA Overmolding Parts
YOMURA Overmolding Part Design
YOMURA Overmolding Examples
YOMURA Overmolding Products
Overmolding Parts from YOMURA
Overmolding Products from YOMURA
Overmolding Parts from YOMURA
Overmolding Parts from YOMURA
Overmolding Parts from YOMURA
YOMURA Overmolding Examples
YOMURA Overmolding Examples
YOMURA Overmolding Product Design