Injection Molding

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Injection Molding Service

Digital manufacturing for plastic prototypes and on-demand production parts. Request an injection molding quote today.

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Injection Molding Processes

Make the move from prototyping to on-demand manufacturing for affordable, high-quality molded parts within days. Better yet, your prototyping tool is free once you shift to an on-demand manufacturing tool. Working with a single supplier that provides free design consultation services also massively speeds up the manufacturing process, allowing for greater supply chain flexibility, more consistent parts, and making qualification a breeze.

Liquid Silicone Rubber Molding

Liquid silicone rubber molding is a thermoset process that mixes a two-component compound together, which is then heat cured in the mold with a platinum catalyst to produce a final part.

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Insert Molding

Overmolding and insert molding are two-part injection molding processes where one material is overlaid onto a second substrate part or metal insert to create a single component.

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Overmolding

Plastic injection molding is a manufacturing process where resin in a barrel is heated to a molten state, then shot into a mold to form a final production-grade thermoplastic part.

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What’s in an Online Injection Molding Quote?

We do quoting a little differently. When you request an injection molding quote, you’ll not only receive accurate pricing, but also a manufacturing analysis—within just a few hours. Our online quoting platform also provides you with gate and ejector pin layouts and a price curve tool to help select the best tooling option for your project.

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 Injection Molding Service

At RJC , we specialize in high-quality custom injection molding and mold tool making.

injection molding is by far the industry’s most common way to manufacture plastic parts, especially when making larger quantities.

We provide custom molding for 50 to 100,000+ injection-molded parts as well as a wide range of other manufacturing and finishing services to complete your project.

What is injection molding?

 injection molding is the process of making plastic parts via the injection of molten plastic — typically a thermoplastic — into a metal mold, which is usually made from steel or aluminum.

The machine feeds raw material into the mold itself, the geometry of which is effectively a negative impression of the final part and which usually consists of two sections: an injection (A) mold and an ejector (B) mold.

The space between the two sections is the mold cavity, into which material is injected.

Although capable of producing a very wide range of parts, injection molding has some design constraints. Parts must have fairly narrow walls, should generally avoid overhanging features, and must have some degree of draft (tapered sides) so the part can be ejected from the mold.

Injection molding is principally used with plastics, and thermoplastics in particular. Thermoplastics are polymers that soften at an elevated temperature (at which point they can be freely injected into a mold) then return to a solid state after cooling. Injection molding also works with thermosets, which can be cured to make a solid but cannot then be melted back into a liquid state. Less common are elastomers.

RJC Injection Molding Case Study

Case Study: Expanding Global Product Line Using RJC Injection Molding
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Case Study: Expanding Global Product Line Using RJC Injection Molding
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Case Study: Expanding Global Product Line Using RJC Injection Molding
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Why Choose RJC for Injection Molding?

Need a manufacturing partner that produces parts domestically? Our US-based injection molding facilities can help you mitigate supply chain risk and quickly respond to changes in demand.

Every quote includes real-time pricing and design analysis. We evaluate your 3D CAD and help identify any features that may pose challenges during the molding process such as difficult to machine undercuts and insufficient draft. Plus, our team of experienced applications engineers is available to discuss your unique design, evaluate cost tradeoffs, and even help you optimize your parts and make design changes with our Consultative Design Service.

Procuring parts on demand, without MOQs, helps you manage market or demand volatility, eliminating the need to sign up for large part volumes with traditional production toolers, and providing a second source for bridge production, line-down emergencies, end-of-life production, or product customization.

We’ll work with you throughout the course of your project to help you quickly move from prototyping to production, including finishing options and a full suite of secondary operations for complete end-use parts.

Need a manufacturing partner that produces parts domestically? Our injection molding facilities can help you reduce supply chain risk and respond quickly to changes in demand.

Get custom injection molded and production parts in as little as 10 business days. We provide professional engineering reviews and give you dozens of materials and finishes to choose from.
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Injection Molding FAQ

What plastics can you use with injection molding?

Injection molding can use almost any type of plastic that can also be combined together. This unmatched versatility is what makes injection molding so popular and suitable for some of the most demanding industries in the world. You can check out our selection of available materials and finishes on this page.

What is the process behind injection molding?

The plastic pellets are melted and are then inserted in liquid form into the mold tool, where it cools and takes the required shape. The process allows for high precision and tight tolerances because it can be replicated exactly each time.

Why should I use injection molding?

Injection molding is one of the most affordable ways to manufacture large quantities of parts, especially for bigger production runs. Even though designing and creating the mold can take time, after that, the process becomes very affordable and efficient.

How quickly can you produce parts using injection molding?

Before production can begin, we will first need to design the injection mold tool. How long this takes will depend on the complexity of your project, but the usual timeline can be as short as a week and as long as a couple of months.