Injection Molding

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

Injection molders fabricate parts with a range of complexities, from simple shapes to close tolerance precision parts. From medical equipment, computer and automotive parts to office supplies, toys and tools, injection molded parts are found in almost every sector of industrial and consumer industries. Read More…

Injection Molding Injection molding is the most common method used by plastic suppliers, encompassing 32% of all plastics processing applications.

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

A few common examples of injection molding include catheters, contact lens containers, monitors, mop buckets, video game cartridges and screwdriver handles. Injection molding is primarily done with thermoplastics; however, a small amount of thermosets, biodegradable plastics and elastomers are also subjected to this process. There are many advantages to the injection molded process. Some of these advantages include high production rates and little need to finish parts after the molding is complete.

In addition, the cost per part is very low despite the high cost of tooling. Since injection molding can be used to produce very complex parts, injection molding is often used to produce parts that no other process can do. Other advantages of the injection molding process include the efficient use of materials and energy, precision-formed parts and a negligible amount of waste produced.

The most common type of injection molding machine are hydraulic oil machines, which use the force of hydraulic fluids to move the mold through the machine. Next in popularity is the toggle injection molding machine. Toggle machines use mechanical links to advance the mold in the machine. In addition, hybrid hydraulic/toggle machines are beginning to emerge in the injection molded plastics industry. Hybrid machines are used to eliminate some of the problems of other injection c molding machines, such as slow processing rates of parts and rapid wear and tear of machines.

No matter the machine, the injection molding process remains the same, beginning with heating the barrel section of the machine. Next, plastic pellets or granules are fed into a hopper where a screw pushes them to the heated barrel. In the barrel, the pellets or granules are heated to the melting point. The molten plastic material is then injected into the cavity of a split die chamber/mold, which is then clamped shut.

The plastic resin cools as water or other fluids circulate through the cooling system of the mold, extracting the heat. The injection molded part is held in the mold under high pressure until the part solidifies. The plastic part is finally ejected from the plastic injection mold, and the process begins again.

Injection Molding Informational Video