Plastic Injection Molding

A reliable source for Injection Molded Plastics information and leading Injection Molded Plastics Companies & Manufacturers.

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.

Leading Manufacturers

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. We can provide effective, efficient, and affordable solutions that will help you meet your goals and get the job done right. Contact us to learn more today!

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GSH Industries, Inc. $$$

Holland, OH  |  419-867-3900

In business since 2003, ICOMold has gained a reputation as a leader in low-cost, high-quality injection molded plastics. Headquartered in Holland, Ohio, we serve many industries and provide injection molded plastics to customers around the globe. Our online quote system provides fast quotes for your injection molded plastics projects.

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ICOMold $$$

Shelby Township, 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, and we are here to help you in every step of the molding process. For additional information, please visit our website!

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MSI Mold $$$

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. We use the latest technology in injection molded plastics to meet your needs. It is our goal to find the right solutions at the right price. Contact us for details!

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Britech Industries $$$

Riverside, CA  |  951-509-6918

We manufacture a variety of injection molded plastics for industries around the world. We use the latest technology, most innovative systems, and digital manufacturing to ensure that we create products that you can rely on. We make it our goal to build the best plastic products that you can depend on even in today's challenging world. Find out more by contacting us today!

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Molded Devices, Inc. $$$

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 $$$

Minneapolis, MN  |  866-900-2385

Diversified Plastics, Inc. (DPI) provides full-service plastic injection molding, Carbon DLS additive manufacturing and value-added services. The company also offers design for manufacturing assistances, complex in-house tooling, cleanroom assembly and value-added services. DPI uses a wide range of injection molding plastic resins, including engineering, high-performance and commodity grade resins.

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Diversified Plastics, Inc. $$$

Mountain, WI  |  715-276-4200

Nicolet Plastics is an injection molder that specializes in molding of complex parts from our two world-class facilities in Mountain, WI and Jackson, WI. We service our customers by offering solutions to all your molding needs including Carbon 3D printing and post molding / assembly. Our Mountain plant focuses on low to medium runs while our Jackson plant focuses on medium to high volume work. For over 30 years, we have achieved steady growth due to our fast, flexible team and great customer service.

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

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