CN Mould & Plastic Limited
#Advanced manufacturing

Rubber Insert Molding

The basic principle of plastic insert molding is similar to that of plastic injection molding. First, a plastic insert is prepared and placed into the mold. Then, melted plastic is injected into the mold cavity and left to cool and harden. The finished plastic part is then removed from the mold.


The only variation is that an additional step is required to insert the plastic into the mold. This ensures that the plastic covers the insert and maintains a consistent wall thickness, without cracks.

Request a Quote
plastic insert molding

How Does Rubber Insert Molding Work?

1

To begin, customize the mold to accommodate the plastic insert. The plastic insert can be placed by hand or by an automated process.

2

Next, inject the melted plastic into the mold cavity.

3

After cooling and solidifying, the plastic is combined with the plastic insert.

4

Open the mold and remove the part.

5

Separate the part from the sprue and post processing.

How Does Rubber Insert Molding Work?

The Difference Between Rubber Insert Molding And Overmolding

Plastic insert molding and Overmolding are two technologies of adding an additional layer of plastic to an existing plastic component.


There are still some significant distinctions between the two injection molding techniques. Insert molding is a process where a plastic insert that has been pre-made is put into a mold and then plastic is injected into it. While Overmolding is a two-step process where a mold cavity is partially filled with one type of plastic and then another type of plastic is injected to cover the first injection.

Explain Advantages of
Rubber Insert Molding

1. Reduce assembly and labor costs: using insert molding technology, which involves combining plastic inserts with other thermoplastic materials, can lower assembly and labor expenses.


2. Improve reliability: insert molded plastic parts can be more reliable because each plastic insert is securely fixed in the thermoplastic material, preventing any issues with loose parts or misalignment.

Explain Advantages of Rubber Insert Molding
We're here to help you for your any Injection Molding needs.
Your Molding Expert!
INJECTION MOLDING EXPERT
#ADVANCED MANUFACTURING
#SPECIAL
Designing the Parting Line in Injection Molds
04-17
The parting line is the surface where the two halves of an injection mold meet. It can take many forms, including horizontal, stepped, inclined, curved, side, and even irregular shapes. While parting ...
Processing TPU: Key Techniques and Precautions
04-16
TPU (Thermoplastic Polyurethane) is a high-performance polymer material. Compared to conventional plastics and rubber, TPU offers a wide hardness range, outstanding mechanical properties, and excellen...