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. Here are a few examples:

Transform a fragile item into something durable and robust.

Form a barrier against dust and water

Create a seal using a flexible elastomer

Better aesthetics and sustainability

Rilong Mold is exceptionally qualified to handle overmolding for a wide array of consumer and life science applications. Our expertise spans high-performance silicone overmolding on plastic, embedding electronics in plastic for cutting-edge devices, and layering silicone on silicone to create safer infant pacifiers. With our advanced technical skills and in-depth material knowledge, we can tackle the most complex and demanding projects.

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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

PPE/PS

PBT

POM

LDPE

PVC

Rubber Plastics

Metal Materials

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 begins with standard injection molding of substrate parts using an aluminum mold without heating or cooling lines. This results in longer cycle times, allowing for careful monitoring of fill pressure, cosmetics, and overall quality.

Once all substrate parts are molded, overmold tooling is assembled, and each part is manually placed into the mold to be overmolded with thermoplastic or liquid silicone rubber.

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.

After the molding run is complete, the finished parts are promptly boxed and shipped, ensuring quick delivery to the next stage of production or directly to customers.

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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.