Advantages of injection moulding

Updated February 21, 2017

Injection moulding is a method of creating plastic products. Most plastic products are made using injection moulding. This process is attractive to manufacturers because of multiple advantages it provides over other plastic moulding methods. Overall, injection moulding is simpler, more reliable, more versatile and more efficient than most other types of injection moulding.

High pressure

Plastic injection moulding operates at a very high pressure, meaning that the melted plastic is pressed harder against the mould than in other moulding processes. This provides the advantage of a greater amount of detail in the design of the piece being moulded, included complex geometry or detailed features.


The injection moulding process is also very fast compared to other moulding processes. A full injection moulding process takes very little time, which allows for far more products to be generated from the same mould. Therefore, you get a lot more mileage out of a single mould. Injection moulding is highly efficient.


Injection moulding is a highly automated process. Most injection moulding is done by machines that a single operator can run. Therefore, very little overhead will have to go into paying the labour force in a plastic injection moulding process.


Injection moulding is a monomer-free process. Monomers are a type of plastic that create a lot of fumes, which many people have a negative physical reaction to. Therefore, any moulding process that employs monomers require a good deal of ventilation. If you use injection moulding, you will not have to worry about these problems.

Multiple plastic types

When you use injection moulding, you have the option of moulding two different types of plastic at once. This process is called co-injection moulding. Therefore, you do not have to worry about access to a particular type of plastic.


Injection moulding makes use of thermoplastics. Thermoplastics can be injected into the mould, then the excess can be remelted and used again. Therefore, injection moulding can save you on materials. Thermoplastics can also come in a wide variety of densities or strengths.


Injection moulding provides you with the option of using fillers in your moulds. Fillers are used to reduce the density of the plastic as it is moulded as well as provide greater strength to the product once it is moulded. This is another method of reducing the total cost of the process.

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About the Author

Justin Mitchell has been a writer since 2009. In 2002, he received a B.A. in theater and writing from the University of Northern Colorado. Mitchell worked as an ESL teacher in Europe and Asia before earning a master's degree in journalism from the City University of New York. He has written for the "New York Daily News" and, among other outlets.