2 color injection molding

What Is the Process of Injection Molding?

Plastic pellets are moved through a heated screw and barrel during the injection molding process, melting the plastic to a molten state. An auger arrangement is what the screw and barrel of an injection molding machine resemble, pushing the material forward as the screw rotates.

The plastic “shot” that accumulates in front of the screw during rotation pushes the screw location inside the barrel rearward. The spinning stops when the requisite shot weight is reached in the barrel.

Injected into a Die

The molten plastic is then injected into a die that is contained and has the shape of the finished plastic product as the following step in the process. The die is allowed to cool after being filled with plastic.

The next shot is processed through the barrel while the plastic result is cooling.

When cooling is complete, the tool opens to release the final plastic product, then it closes to start the process all over again. Cycle time is the length of time needed to process raw plastic through the barrel, inject it into the enclosed tool, and eject the finished product.

A number of distinct elements, including the product thickness, which affects the cooling time of thicker components, and the overall sizes, which might affect the time needed to fill the 2 color injection molding, will affect the entire cycle time of a plastic product.

Almost Anything May

Almost anything may be done using injection molding. The mass production process has been completely revolutionized by this technology, which was developed in the 1940s and continually improved. It provides for enormous flexibility in product design.

The act of pumping molten materials into a mold or die is known as injection molding. After cooling, the material assumes the physical properties of the hollow or cavity of the mould. Nearly every plastic product you use on a daily basis is made using this procedure. Injection molding has been used to manufacture anything from the soft drink bottle cap to the dashboard of your car. Even the plastic parts of the computer you’re using right now were created via hot runner manifold.

Injection Molding Works with a Wide Range of Materials

Injection molding works with a wide range of materials, including plastics, metals, and practically anything else that can be made malleable. The several machine types’ variations in size, shape, and operating costs enable a wide variety of customization. Plastic or metal products can be produced in the same mold repeatedly, as is the case with the majority of items produced in bulk, which spreads the mold’s construction expense over a larger number of products.

Because of this, mass-manufactured goods like DVD covers, toys, and coat hangers may be produced for nothing more than the cost of the raw ingredients, in contrast to limited-run goods like vinyl toys or individually created works of art, which are much more expensive per unit.

Products made by Injection moulding die are widely available. The next time you order a kid’s meal at a fast food establishment, you’ll probably discover that a toy is included. Since hundreds of thousands of the exact same toy have been produced using the same plastic molding shape, making that toy will only cost a very minimal amount to produce (not to mention the cheaper materials). Although it might sound strange, the same technique is used by designers and artists to make unique molds. These unique goods will be much more expensive than the cost of producing, say, 100 units from the same mold.

The Injection Molding Process Has Its Limitations

Because of the nature of the technique, only one complete, solid item may be produced at once. Manufacturers and designers get around this issue by adapting their product designs to these constraints. An example would be a toy plastic automobile, which would have two molds for the outside and possibly another mold for the interior, which would detail the seats, dashboard, and steering wheel.

Our society has become so accustomed to injection molding that its limitations are no longer even acknowledged as such. There aren’t many solutions available if something cannot be made with this moulding, with the exception of carving the item by hand (a time-consuming operation if you need to make thousands of identical objects).


Injection molding is adaptable and an essential component of contemporary life. The ability to produce almost anything, whether it be useful or beautiful, broadens the possibilities of craftspeople, artists, designers, and regular people. In essence, practically anything may be produced via injection molding.

Food packaging products including cutlery, plates, lids, and containers, as well as other items like caps, clothes pegs, and children’s toys, can all be made using injection molding.

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