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Over Moulding Vs. Insert Moulding- Choose Wisely

Know The Most Popular Thermoset Injection Moulding Techniques

The companies need to know about the most popular techniques available these days if they want to use the thermoset injection moulding process for complex parts development. The popular techniques commonly used these days are known as over moulding and insert moulding. These processes have gained much attention as companies try hard to innovate their processes to meet the 21st-century technologies. Even though these two processes have slight differences, one needs to put on their thinking hats and find the right one for their projects. Understanding a bit more in detail might help project managers to take the right process for their project. The project managers in TPI, the top plastic mould manufacturer in India are experts in making such decisions.

Understanding The Difference Between The Techniques Of Thermoset Injection Moulding

Thermoset Injection mold insert moulded components at display at the leading plastic moulding company in India

Insert Moulding

The major reason behind insert moulding is that a piece or a part is manufactured specifically to fit correctly as a component or an inner piece inside a big injection moulding design. The original part will be given to a separate assembly space where it will be combined into the larger injection moulded component. The insert part will flow in and around the original part to connect with it. The final product will have the original part or multiple pieces moulded into a bigger plastic product. Some examples of insert moulding are scalpels with plastic exterior pieces, metal knives, etc.

Over Moulding

The Over moulding process is quite similar to insert moulding. This process happens when two separately moulded parts are joined together to enhance a product’s feature. The process is called over moulding because the original part is moulded onto a second material. Examples of over moulding include plastic materials such as a toothbrush, a mop, or even a snow scraper.

Analysing The Project Materials

Certain experts classify over moulding and insert moulding as the former is for plastic on plastic while the latter is for plastic on metal. However, in reality, the difference is a bit more. Individual products can also be made with metal and plastic, multiple plastics, and different acrylic materials or polymers. So it is important to assess over moulding and insert moulding on an individual case basis.

Also Read: Thermoset Injection moulding process

Assessing The Assembly Processes

The major detail that can affect the over moulding or insert moulding is its use of the assembly line approach in creating a finished product. If the company says that the original moulded part must go through separate line assemblies, the desired technique will be insert moulding and not over moulding.

Before choosing the right technique, think of the original part has to go through evaluations, product checks, etc., before moulding into a bigger piece. For example, in the case of metal fasteners, if you see that the metal is put through different processes such as deburring, annealing, polishing, etc., before the additional injection moulding, then it is an insert moulding technique.

In the insert moulding technique, the products made of plastic substances are made efficiently. On the other hand, the over moulding technique is practically attached to the original product. Examples of insert moulding techniques are clips, fasteners, bushings, etc., which are inserted in a plastic structural design or framework. The over moulding examples include applying more than one plastic layer to connectors, cables, etc.

The companies that use both these techniques will understand how an insert moulding project will look like in the future. They will also understand the processes to make more precise production which can guarantee quality results.
When designing a manufacturing project or process, it is better to understand both over moulding and insert moulding and how they can help you build a quality supply chain.