Overmolding and Insert Molding

Enhancing Your Products by Overmolding


Both overmolding and insert molding injection processes involve combining two different materials to create a single part, often including threaded metal inserts. This technique ensures a seamless integration of multiple plastic components, resulting in a uniform and durable product. Rilong Mold excels in handling overmolding for various consumer and life science applications. Our areas of expertise include:
High-performance silicone overmolding on plastic.
Embedding electronic components into plastic for cutting-edge devices.
Silicone-over-silicone overmolding to create safer infant pacifiers.
Better aesthetics and durable

With advanced technical skills and extensive material knowledge, we can tackle the most complex and demanding projects.

Overmolding &Insert Molding of Exquisite Quality

Plastic and silicone overmolding demands more than just advanced equipment, which we have at our state-of-the-art manufacturing facility in Dongguan China. It also requires extensive knowledge of raw materials and their compatibility, especially regarding factors such as shrinkage and temperature requirements.
Strong parts
Improved Aesthetics
bridge tooling
pilot runs

Materials of Overmolding and Insert Molding

At Rilong, we offer a wide range of molding materials and additives to meet special requirements. Our professional material experts can customize the most cost-effective solutions to meet your specific needs. Here is our list of injection molding materials and additives for your reference.
Plastic Materials

The General materials listed below are for custom insert and over-molded plastic injection.

ABS
HDPE
PA6/6
PTFE
PP
PC
PE
PPE/PS
PBT
POM
LDPE
PVC
PU

Overmolding vs Insert Molding

The overmolding and insert molding processes are specialized injection molding techniques used to integrate multiple materials or components into a single molded part.

Overmolding

Overmolding molds a material layer over an existing part to enhance aesthetics, grip, or functionality. After substrate parts are molded, they are manually placed into the overmold tooling for thermoplastic or silicone rubber molding.

It is commonly used for tool handles, electronic device covers, toothbrushes, and razors. It’s ideal for creating parts with a soft, flexible outer layer over a rigid base

Insert Molding

Insert molding is a similar process, but it involves using a preformed part, often made of metal, which is placed into the mold. This preformed part is then overmolded with a thermoplastic resin to create the final component.

Suitable for applications requiring strength and conductivity, such as electrical components, automotive parts, and medical devices. It’s used to enhance the structural integrity and durability of the final product.

Transforming Your Ideas Into a Reality

Rilong Precision Mold World Class Injection Molds and Molding Services
Concept to distribution, We get it done

DESIGN

From initial sketches to detailed CAD/CAM designs, our team of skilled technical designers and engineers will expertly guide you in preparing your component for the molding process.

MANUFACTURING

Our multiple facilities, equipped with the latest technology and staffed by experienced professionals, ensure that we meet a wide range of production needs with precision and efficiency.

FULFILLMENT

Rilong offers global distribution services through our three strategically located warehouses in Shenzhen, Dongguan, and Zhuhai. This ensures timely delivery, regardless of your location.

Customer-Focused Partnership

At Rilong, we design and develop new product molds based primarily on our customers’ ideas. We take pride in listening to customer feedback and implementing their innovations, ensuring that their vision is brought to life.

Leaders in Innovation

Rilong Precision Mold supports this rapid pace by developing and building advanced tools that ensure we remain at the forefront of the industry, consistently leading with innovation and excellence.

Need High Quality Injection Molded Parts?

If you have a great idea, we can help bring it to life. We’ve done this before and enjoy becoming partners throughout product creation. From advising you through the mold sourcing process to delivering your new product to customers, we want to work with you every step of the way.

A Never-Ending Pursuit to Get Better

Our strength is our flexibility and adaptability. We combine our experience with your ideas to bring out products that are one step into the future.

Quality Defect-Free Production

Our vision is to not only deliver products that exceed customer expectations but also to help them reduce costs by working with them in the mold design fields. 

On-Time Order Delivery 

We desire to ensure that customers receive the goods accurately and complete delivery in the shortest possible time.