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Plastic Injection Molding

A reliable source for Plastic Injection Molding information and leading Plastic Injection Molding Companies & Suppliers.

It is the most common manufacturing technique employed in the making of the plastic objects we use each day, ranging from automotive dashboards to bottle caps and children’s toys. Read More…

Plastic Injection Molding Plastic injection molding is the process of using molten plastic and an injection mold machine to create molded plastic products.
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Leading Manufacturers

Denver, CO  |  303-592-9548

For 50 years, LTM Plastics has been a leading manufacturer of injection molded plastics. When working with LTM Plastics, our customers can be assured that they are getting high quality products at a competitive price. We pride ourselves on our team’s communication and collaboration with our customers to meet their needs.

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LTM Plastics $$$

Imlay, MI  |  248-275-1978

If you are in need of injection molded plastic parts that are of consistent quality, look no further than MSI Mold! We have over 30 years of experience in design, production, and tooling of custom plastic parts.

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MSI Mold $$$

Cleveland, OH  |  440-238-3009

You won’t find better quality injection molded plastics anywhere else in the industry. We have built ourselves up from a small manufacturing company to a large company with decades of experience.

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GSH Industries, Inc. $$$

Stuart, FL  |  772-286-9278

We may have started small, but today, we offer our products and services to companies around the world. We are dedicated to our customers, and our goal is to offer better service and pricing to any customer no matter the size.

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Britech Industries $$$

Riverside, CA  |  951-354-0258

At R.M.Tool, we provide custom CNC Machining to help our customers solve some of their toughest machining needs. Our state-of-the-art CNC machining department is equipped with Milling, Turning and Wire EDM Machining Centers. We can process materials such as Steel, Stainless, Aluminum, and other Exotic Materials. We strive to always please our customers by always delivering quality products. From design to finished product, R.M.Tool is your one stop shop for all of your CNC machining needs.

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Hi-Rel Plastics & Molding $$$

Tempe, AZ  |  951-509-6918

Call Molded Devices for a fast, competitive quote on plastic molding, plastic injection molding, and medical injection molding services. A wide range of standard & proprietary caps, covers & containers plus custom components for all your needs. We are your one-stop for design consult, quick prototyping, custom formulations & secondary operations!

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Molded Devices, Inc. $$$
placeholder image LTM Plastics MSI Mold GSH Industries, Inc. Britech Industries Hi-Rel Plastics & Molding Molded Devices, Inc.

The process of plastic injection molding is used for mass production and prototyping because of its ability to yield high runs at close tolerances. Injection molding is commonly used in the consumer, food service, medical, plumbing, computer and automotive industries, as almost any plastic object can be made from a plastic injection mold. Plastic molding has many advantages including: fast turnaround times, low labor costs and the ability to make complex plastic products.

Waste produced during the molding process is minimal because material is injected into a precisely cut mould. There may be a joining line where the two halves of the mold cavity meet, but the amount wasted is negligible and can be removed during finishing. Any other plastic material waste can easily be recycled for use in further production runs.

Plastic Injection Molding Machine Plastic Injection Molding - Britech Injection Molded Plastics

Another advantage of plastic injection molding is the wide variety of materials available for use in the manufacturing process. Material choice is usually dependent on the intended use and function of the product. Most molded plastic products are made from thermoplastics, which become more pliable when heated and rigid when cooled. Thermosets and elastomers, like rubber, are also used in the injection molding process.

The basic machinery used in the process of plastic injection molding consists of a hopper - where the plastic pellets are placed prior to being heated. The plastic material is then fed into a heating unit where it is heated and mixed until molten, at which point dyes or other chemical agents can be added to change the final appearance and feel of the product. The two halves of the injection mold are clamped together under pressure and then the molten plastic is injected into the mold - an inverse of the desired shape of the part being made.

The plastic is then left for a short time to cool and harden before the two halves are separated and the plastic part is ejected out of the mold using ejector pins or rods. Plastic injection molding is a highly beneficial manufacturing choice, yet a disadvantage to be considered is the initial expense of the plastic injection mold that will need to be designed and engineered. However, the many advantages outweigh this expense for many manufacturers.

Plastic Injection Molding Informational Video


Plastic Molding Processes

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