Injection molding services

Create strong, consistent injection molded parts with a range of industrial thermoplastics.

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On-demand manufacturing

We create and ship parts for customers across the US and the world.

Networked, global infrastructure

Remove the logistical risk typically associated with outsourced manufacturing.

Imagine, design, build

Access industry-grade materials and expert engineering insight.

Make your project possible

Harness cutting edge technology to take your project from prototype to production.

What is injection molding?

Injection molding is used to create strong, durable plastic parts and is ideal for manufacturing projects with high volume production requirements. During the injection molding process, molten thermoplastic is injected into a metal mold and then cooled to form consistent and durable solid parts.

Get your injection molding project started today. Upload your CAD file to our Cloud Manufacturing Platform™ to receive a quote, work with our engineers to optimize your design, and move to production when you’re ready. You can specify the post-production and finishing options you need for your parts, along with any inspection requirements. When your order is ready, we’ll package and ship the finished parts to you.

Explore our injection molding service

Reliable and cost-effective, plastic injection molding is commonly used for high volume production runs but is also suitable for prototyping. Our injection molding service also includes the following sub-capabilities:

Insert molded parts

Insert molding

Insert molding involves the injection of molten thermoplastic around a pre-placed insert to create strong, durable prototype parts.

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Overmolding is a process in which multiple shots of thermoplastic are injected over or around a substrate to create highly customizable prototype parts.

Family molding

Multi-cavity/family molds

Multi-cavity molds and family molds, enable the production of multiple injection molded parts from a single shot of thermoplastic. 

Injection molding applications

The injection molding process is precise and consistent, and used in a variety of industrial applications:

High volume production

Injection molding is ideal for high-volume production runs of identical plastic parts – and becomes more cost-effective with larger orders.

Customer end-use

Injection molding is capable of creating strong, durable, parts for an array of customer end-uses, including toys, plastic bottles, scissors, screwdrivers, remote control coverings, and case assemblies.

Injection molding materials

Create your injection molded parts from a range of industrial thermoplastic materials:

Common thermoplastic materialsOther supported materialsAdditives and fiber
Acrylonitrile Butadiene Styrene (ABS)Nylon (PA 6, PA66, PA12)UV absorbers
Polyethylene (PE)Polycarbonate/Acrylonitrile Butadiene Styrene
Flame retardants
Polypropylene (PP)Polyurethane (PU)Plasticizers
Polycarbonate (PC)Polymethyl Methacrylate (PMMA/Acrylic)Colorants
High Density Polyethylene (HDPE)Glass fibers
 Low Density Polyethylene (LDPE)
Polystyrene (PS)
POM (Acetal/Delrin)
Polyethylene Terephthalate (PET)
Thermoplastic Elastomer (TPE)
Thermoplastic Vulcanizate (TPV)
Polyetherimide (PEI)
Polysulfone (PSU)
Inquire for additional options

Injection molding production considerations

Optimize your injection molding project with these key production considerations:

General process information
Maximum part size​800 x 800 x 400 mm
31.5 x 31.5 x 15.7 in
Minimum part size1 x 1 x 1 mm
0.04 x 0.04 x 0.04 in
ToleranceBest achievable tolerance: ±0.001″ (0.025mm)
Standard: ±0.005″ (0.127mm)
For larger part tolerances please contact a Fast Radius engineer
Lead timeAs low as 2 weeks for T1 samples
After T1 sample approval, lead time for < 10,000 parts is as low as 1 week
Tool validationStandard process is to produce a small set of T1 samples for approval before initiating full production
Maximum press size1600T
Minimum order size100 parts and $5000
Set-up fee$500 per mold per order (applies to sample runs after initial T1 samples or engineering changes)
Tooling information
Production toolingSteel tool with shot life up to 1M shots
Ability to integrate side-pulls or cam-actions
Typically machined in 3 weeks
Rapid toolingMolds with steel cavity and core with a shot life of 5,000-10,000 shots
Typically machined in 2 weeks
Multi-cavity or family moldsMultiple identical cavities or family of parts machined into a single tool
Allows for more parts to be produced per shot, minimizing unit costs
Insert moldingInserts are placed into the mold and molding occurs around them to extend tool life for critical features
Allows for inserts such as helicoils to be molded in your design
Insert moldingPremade parts are placed into the mold and molded over
Allows for multi-material injection molding

Injection molding case studies

Our injection molding services solve manufacturing challenges for organizations around the world. Learn more about the ways that our work creates an impact.

Face shield

Making safer working conditions possible

In order to meet urgent demand during the Covid-19 crisis, we needed to ramp up production of face shields for frontline workers. To achieve this, we transitioned a 3D printing design to injection molding, and got tooling up and running quickly.

Why choose Fast Radius for injection molding?

Quality manufacturing

We manufacture high quality injection molded parts to meet industrial strength, durability, and tolerance requirements.

Industry Leading Experience

Industry expertise

Access a team of manufacturing and engineering experts that care about your project, and will work with you from concept to fulfillment.

World Economic Forum

Innovation and agility

Our manufacturing services are powered by innovation: the World Economic Forum has recognized Fast Radius as one of the most innovative factories in the world.


Global reach

A global network of production partners and logistics hubs ensures the fastest possible shipping times. Our partnership with UPS gives us the power to move products around the world with ease.

Factory of the Future

The factory of the future

The Fast Radius Cloud Manufacturing Platform™ combines digital design technology with cutting-edge expertise to make your projects possible.

Trusted by engineers across the globe


We transition from additive production to injection molding with our customers all the time, so we knew exactly how to approach design, manufacturing, and fulfillment to get our face shield to market quickly.

John Nanry Chief Operating Officer, Co-founder, Fast Radius


When you’re trying to create something new, it’s a huge advantage to have a true partner on your side. Fast Radius gave me the options I needed and had the resources to help me manufacture my product from start to finish.

Phillip Van Pelt CEO and Founder, Flip Rehab

Get a quote for your injection molded parts

Quoting is simple with Fast Radius. Learn more about our quoting process here.

Learn more about our injection molding capabilities


Our injection molding services, including insert molding and overmolding, enable you to prototype in a range of thermoplastics.

Parts production

Our injection molding services offer fast turnaround times, accuracy, and consistency, and are suitable for mid to high volume production.

Post-processing and finishing

Customize your injection molded parts with finishing and post-processing options, including surface detailing, coloring, and texturing.


Manufacture your injection molded parts to precise industry certifications and standards, including ISO9001 and AS9100D. Customize inspection services to suit your project.

Fast Radius manufacturing solutions

Fast Radius manufacturing solutions serve the needs of businesses across the industrial landscape. Explore our capabilities:

3D printing

Fast, scalable, and cost-effective 3D printing technology for a variety of industrial applications.

CNC machining

Automated CNC turning and 3-axis and 5-axis milling, using rotating drills, end mills, and lathes.

Urethane casting

Versatile mold-casting for the production of urethane parts customizable with colors and textures.