Everything You Need to Know About Plastic Injection Molding

The plastic injection molding is popularly considered to be 1 of the most vital facets in the production of plastics in Malaysia for various reasons across arrays of industries. It is one of the oldest and most reliable ways of manufacturing plastics. It involves the process of creating thermosetting plastic and thermoplastic supplies. These materials are used in large scale industries such as automotive and medicine. The main idea of this process is to use molten plastic in liquid form straight into a mold of any shape you want your custom plastics to be. For example, you may want a round plastic container, so the mold needs to be exactly round shaped.

Once you have molded the plastic in the container, let it cool down. Once the process of cooling is complete, the mold can be easily removed and you will have a custom-made round plastic container.

However, there are 4 things that you must be aware of plastic injection molding and they are as follows –

The Process

The name Plastic Injection Moulding is aptly named since the process involves a manufacturer, injecting the liquid plastic material into the mold. The process starts with applying a certain amount of heat to small pellets until they become molten liquid. The temperature while heating the small pellets should be between 200 to 400 degrees centigrade. The pliable hot liquid is transferred into the mold using the nozzle. The nozzle comes in different shapes and designs. As soon as the molten liquid has cooled down completely, you can remove them with ejector pins from the mold.

The Price

There is no denying the fact that this process of plastic injecting molding is fairly priced, especially if you are manufacturing them in large quantities. These moldings are generally fully automated which is why they are used for mass production and so, they are extremely budget-friendly.

The Lingo

It is important to know that there is a separate lingo for plastic injection molding. Remember the following lingo while you are at the shop – 


A hollowed space inside the mold. This is where you inject the hot material for creating a custom-made plastic product.


This is the excess plastic portion that comes out of the molds.


This is the place from which the hot liquid plastic enters into the mold.


A waterway or channel for the plastic liquid to travel from the molding machine and reach the gate.


A force that is created to induce heat once the resin layers touch each other during the process of the plastic injection mold.


A channel or waterway, connecting the runner to the molding machine's nozzle.


This is the residue, oozing out from the gate. Usually, one requires a machine operator to automatically or manually cut it.

The Details

Plastics made from plastic injection molding are extremely detailed. Generally, the manufacturer works delicately with his engineering team for designing and creating those designs on plastic molds.


To sum up, once the design of the plastic mold is complete, there may be certain finishing touches required to ensure premium quality. If the manufacturer is extremely professional, the plastic products may come out looking extremely polished and detailed.