injection moulded prototype and production parts

Online Injection Moulding Service for Custom Parts

Digital manufacturing for plastic prototypes and on-demand production parts in as fast as 1 day. Request an instant injection moulding quote online today.

Moulds from £995


ISO 9001: 2015 | JOSCAR | ISO 14001:2018

Plastic and elastomeric materials
Product developers served
4.4 Million
Parts moulded each month

Injection Moulding Processes

We can deliver your custom plastic injection moulded parts in as fast as 1 to 15 days, depending on the complexity and volume of your order.

At Protolabs we offer plastic injection moulding, liquid silicone rubber, overmoulding, insert moulding, prototyping and on-demand manufacturing to ISO 9001 quality standards.

Make the move from prototyping to on-demand manufacturing for affordable, high-quality moulded 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.

Plastic Injection Moulding

Injection Moulded Black plastic part

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

1-15 Working Days

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Liquid Silicone Rubber Moulding

injection moulding - silicone rubber part

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

1-15 Working Days

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Overmoulding & Insert Moulding

Injection Moulding - Overmoulded part

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

1-15 Working Days

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Our Injection Moulding Facility

Want a peek behind the curtain of our injection moulding process? Take a virtual tour. We offer a fully digitised injection moulding process to bring you cost-efficient parts fast. From design upload to quoting, from part production to shipping, it’s injection moulding tailored to fit your needs, every step of the way.

Design for Mouldability Toolkit

im dfm toolkit from Protolabs

No one ever said that designing and manufacturing moulded parts was easy. Our goal is to get you through it quickly and with quality parts. A good starting point is our Design for Mouldability Toolkit.

Check Out the Toolkit

Quality Control Standards

DFM for consistency and quality in Injection Moulding

We combine scientific (or decoupled) moulding techniques, with extra attention paid to critical-to-quality dimensions using our proprietary automated CMM process. Plus, with every order you'll get, Comprehensive manufacturing analysis, Consultative design services, Quality reports like FAIs and process capability reports.

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Injection Moulding Sample Quote

IM Sample Quote

Look for the in-depth mouldability analysis and our prototyping vs. ODM pricing comparison feature.

View Sample Quote

Injection Mould Tooling Options and Quality Reporting

We have two unique offers to meet your needs wherever you are in the product lifecycle. Our prototype injection moulding process helps you cut product development cycles by weeks—sometimes months—and bridge to production with injection-moulded parts within days. Our On-demand Manufacturing process is designed to meet your production needs, and helps you qualify parts quickly to seamlessly transition into production with scientific moulding, in-process CMM inspections with GD&T, and a full suite of secondary operations to make sure that your parts show up and perform as expected.

  Prototyping On-Demand Manufacturing

I need to validate my design at Protolabs speeds. I need the flexibility to economically iterate before production.

I have on-demand production needs at Protolabs speeds.

Best When
  • Completing design or material iterations, and assessing cost or manufacturability tradeoffs
  • Key focus is to reduce design risk, increase R&D productivity,  and iterate faster to reduce time to market
  • Typical Quantities <2,000
  • Design is finalised and run-to-run part consistency is critical
  • Key focus is to improve quality, reduce cost, and mitigate supply chain risk
  • Process development, qualification documentation, and mould capability information is required
Mould Price Lower Higher
Part Price Higher Lower
Mould Cavities Single Single and multi-cavity
Mould Life Limited (guaranteed for at least 2,000 shots) Unlimited
Mould Storage Stored for 18 months of inactivity Stored for 3 years of inactivity
Mould Ownership Upon request Yes
Quality Documentation Basic inspection reports available upon request
  • Scientific moulding process development report
  • In-process CMM inspection of critical dimensions, including 9 GD&T symbols
  • First Article Inspection (CTQ)
  • 30 part capability study (CTQ)
Shared Features

Aluminium moulds
Standard lead times as fast as 15 days or less
Tolerances of +/-0.08mm plus resin tolerance (mm./mm.)
Set-up fees apply to each production run 
Consultative Design Services (CDS)
Finishing Options
No minimum order quantities (MOQ)
Quick-turn shipping in as fast as 1 day


Not sure which manufacturing service is right for your project? You can get quotes for both to compare. Alternatively, contact one of our representatives on +44 (0) 1952 683047 to chat about your requirements.

What are the benefits of Injection Moulding at Protolabs?

What are the advantages of Injection Moulding?

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Injection moulding is plastic manufacturing process that can produce high quality parts at scale. It's typically used for low- to high-volume production but our aluminium tooling can also make prototyping runs economical.

  • Low cost at higher volumes
  • Exceptional part cosmetics and surface finish
  • Repeatable
  • Complex parts
  • Low scrap rate
  • Large selection of thermoplastic and thermoset materials

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What are the applications of injection moulding?

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Injection moulding is widely used for plastic part production in medical, consumer, and automotive industries. Typical parts include:

  • Housings
  • Brackets
  • Gears
  • Single-use medical parts
  • Electrical connectors
  • Syringes
  • Containers

How much does injection moulding cost?

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Our moulds start from £995, however, because of the initial capital investment in tooling, injection moulding makes sense for higher volumes of parts. Our mould costs will vary depending on part geometry and complexity. Other factors that will impact injection moulding cost are lead times and material.
To find out how much your part will cost, upload your CAD model to get a free quote.

Do you do production moulding?

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Yes, we offer a production tooling option called on-demand manufacturing. This tooling option provides several benefits: lower piece part price, multi-cavity capabilities, guaranteed tooling for the life of the project (we will cut a new tool if it wears out), and first article inspections.

What are your tolerances for moulded parts?

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In most cases, we can maintain a machining tolerance of +/- 0.08mm with an included resin tolerance that can be greater than but no less than +/- 0.002mm/mm.

Can you use aluminium tools for mass-volume production?

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If you use Protolabs for On Demand Manufacturing, we give you a lifetime guarantee for the moulds so you can use them for mass-volume production.  There are high-volume applications where it is better to choose our ODM offer using aerospace-grade aluminium tooling and others where it makes more sense to opt for steel moulds – speak to our application engineers for advice.

Will aluminium tools last as long as steel tools?

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If you use Protolabs for On Demand Manufacturing, we give you a lifetime guarantee for the moulds so you can use them for mass-volume production.  There are high-volume applications where it is better to choose our ODM offer using aerospace-grade aluminium tooling and others where it makes more sense to opt for steel moulds – speak to our application engineers for advice.

Does it take a long time to produce injection moulding tools?

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While steel moulds typically take 10-12 weeks to produce, and you may need to wait even longer if they are being shipped from across the world, the same is not true if you use Protolabs tooling.  At Protolabs, it takes us between 1 to 15 days to produce moulds. 

What is the maximum part size for injection moulding?

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The largest size we can support with plastic injection moulding is 480mm x 980mm with a depth of 101mm from parting line with 3° of draft, up to 280mm of the part. With a volume of 966,837 mm³ and a projected mould area of 112903 mm²

What materials are available for injection moulding?

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Injection Molding Materials

We have wide selection of more than 100 thermoplastic and thermoset materials. And if you're looking for alternative material options, check out our guide to resin substitutes for ABS, PC, PP, and other commonly moulded plastics.


  • ABS
  • ABS/PC
  • Acetal
  • Acetal Copolymer
  • Acetal Homopolymer/Delrin
  • HDPE
  • LDPE
  • Nylon
  • PBT
  • PEEK
  • PEI
  • PMMA (Acrylic, Plexiglas)
  • Polycarbonate
  • Polypropylene
  • PS
  • PPS
  • TPC-ET
  • TPE
  • TPU
  • TPV


  • Standard Silicone (30,50,60 and 70 durometers)
  • Dow Corning MS-1002 Clear
  • Dow Corning MS-4002 Optical Clear

What's in an Online Injection Moulding Quote?

We do quoting a little differently. When you request an injection moulding 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.

Get a Quote

Additional Links and Resources

Get an online quote and injection moulding design analysis today.