No credit card required upload your file and get a quote


Including mold and plastic material cost, Innovative injection molding solution that optimize your design and cut processing costs up to 50%

Prototype Injection Molding

Prototype injection molding may be your perfect solution for testing your new part....

Production Injection Molding

All production molds are guaranteed for preventive maintenance....

Post Molding Operation

Our ability to assembling parts as per customer specifications....

What Are Injection Molding Parts and Why Sunplast International for Plastic Injection Molding?

Understanding Plastic Injection Molding?

Plastic injection molding is the complex process whereby plastics of varying shapes are manufactured with the help of a simple yet efficient mechanism. Sunplast is an injection molding parts manufacturer that takes scientific approach to develop processes to produce only high-quality plastic parts.

If you have ever seen a plastic toy or a part that fits somewhere, most likely it was manufactured through the process of injection molding. This plastic manufacturing process has revolutionized the manufacturing and contributed significantly to mass consumption.

Sunplast engineers will guide you through each step to make your project successful.

What Parts are Involved In Injection Molding?

The plastic injection molding generally has two main units that work in tandem with one another to deliver the final finished plastic product.

The first half is the injection unit, which is basically a screw that acts as an “injection” to inject the plastic raw material into the mold. It is an Archimedes screw with turns all along its length that helps push the plastic pellets to the mold.

The second half is clamping unit, is the part that molds the molten plastic into the desired shape. Clamping unit helps mold to open and close to produce and eject plastic part.

Thus plastic injection molding follows a simple concept while applying sophisticated machinery.

How Does Plastic Injection Molding Work?

The screw sub-mechanism has an inlet at its top from where they drop the plastic pellets. These pellets are pushed forward by the turns on the screw body. The pellets are also heated by the heaters that cover the tube that encases the injection screw. The screw has check ring in front of it that prevent the molten plastic from escaping back to the screw body.

The molten plastic gets injected into the mold and forms the desired shape. The mold has air vents that allows air to go out when plastic melt enters in to the mold

After the shape molding, the clamp unit opens the mold, and the plastic part is ejected from the mold.

Our injection molding solutions include: Over Molding, Prototype Injection Molding , Production Injection Molding and Post Molding Operation.

Sunplast is one of the most well-known plastic injection molding manufacturers, and we are known for our high-quality and precision oriented plastic injection machines.

Injection Molding Parts