Injection Molding Service

Top performance and cost efficiency for high-volume production parts

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Advantages of Injection Molding

Scalability

Injection Molding can be the ideal process for production runs of 250-25,000+ parts.

Rapid Turnaround

Using our vetted Partner Network, Xometry is able to produce top quality Injection Molded parts in as little as 10 business days.

Efficiency

In higher volumes, injection molding produces significantly less waste than other manufacturing processes.

Part Production

Piece price is significantly lower with Injection Molding vs other processes, particularly as production quantities increase into the thousands.

Strength

Injection Molded parts will generally perform better than the same part CNC Machined from the same material. Careful selection of the resins allow for a wide range of corrosion resistance and chemical and solvent compatibility.

Precision

Injection molds are CNC machined to high precision, high tolerances and are able to produce thousands of identical parts with very small and intricate details.

Injection Molding Processes

Thermoplastic Injection Molding

We are able to deliver top quality plastic injection molded parts in as little as 10 business days. Xometry's Manufacturing Partner Network can help you design and manufacture tools, dies, and molds for rapid tooling for prototyping to advanced mold making for production runs. Full injection molding capabilities including insert molding, overmolding, unlimited undercuts, and internal/external threads are available for applications in: automotive aerospace consumer products industrial / energy medical / pharmaceutical

Mold Making

Our vetted network of partners allow us to quickly convert your 3D part data into a high-quality injection mold at top speed. We offer services from design and manufacturing for tools, dies, and molds for prototyping and production runs. Plastic blow molds, aluminum and steel tooling, 2-shot and 3-shot molding are also available. And with Xometry, you own your own tools, so our partner network also offers mold maintenance services.

Automotive Injection Molding

We are experienced in processes and techniques specific to the automotive industry.

Injection Molding Materials

Plastics

  • Acetal (Polyoxymethylene (POM)) [Delrin]
  • Acrylonitrile Butadiene Styrene (ABS)
  • Glass-Filled Nylon
  • High Density Polyethylene (HDPE)
  • Low Density Polyethylene (LDPE)
  • Nylon
  • Polybutylene Terephthalate (PBT)
  • Polycarbonate (PC)
  • Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS)
  • Polyether Ether Ketone (PEEK)
  • Polyetherimide (PEI) [Ultem]
  • Polyethylene Terephthalate (PET)
  • Polylactic Acid (PLA)
  • Polymethyl Methacrylate (PMMA/Acrylic)
  • Polyphenylene Sulfide (PPS)
  • Polypropylene (PP)
  • Polystyrene (PS)
  • Polystyrene/Polyphenyl Ethers (PS/PPE)
  • Polysulfone (PSU)
  • Thermoplastic Elastomer (TPE)
  • Thermoplastic Elastomer/Vulcanized (TPE/TPV)

Injection Molding Finishes

SPI B-1

600 Grit Paper. Typical Application: Medium polish parts.

SPI B-2

400 Grit Paper. Typical Application: Medium polish parts.

SPI B-3

320 Grit Paper. Typical Application: Medium- Low polish parts.

SPI C-1

600 Stone. Typical Application: Low polish parts.

SPI C-2

400 Stone. Typical Application: Low polish parts.

SPI C-3

320 Stone. Typical Application: Low polish parts.

SPI D-1

Dry Blast Glass Bead. Typical Application: Satin Finish

SPI D-2

Dry Blast #240 Oxide. Typical Application: Dull Finish

SPI D-3

Dry Blast #24 Oxide. Typical Application: Dull Finish

As Machined

No secondary polishing or grinding. Part will show tooling marks.

Applications for Injection Molding

Rapid Prototyping

Although injection molding is best suited for medium to high volumes, the use of low cost tooling allows injected molded parts to be produced very rapidly and cost effectively. In almost every case, an injection molded part will outperform the same 3D printed or machined part from the same material. And depending on the part geometries and the material selected, low cost tooling can last for many tens of thousands of parts.

End-Use Production

Injection molding is best known for producing production parts in the many thousands or even millions. With the advent of newer higher strength materials and fillers such as glass and carbon fiber, parts previously made out of metal are being replaced with injection molded parts to save weight and fight corrosion.

Certifications

ISO 9001, ISO 13485, UL, ITAR, ISO 7 & 8 Medical Clean Room (contact us)



Overview: What is Injection Molding?

The Basics of Injection Molding

Injection molding is one of the most often-used manufacturing processes for creating plastic parts. Thanks to its high-precision, repeatability, and cost efficiency at scale, injection molding is used to make a variety of products and parts from the smallest medical insert up to large automotive & aerospace parts.

How Injection Molding Works

The injection molding process requires an injection molding machine, raw plastic material, and a machined mold. The raw plastic material is first melted in the injection unit and is then injected into the mold — most often machined from steel or aluminum — where it cools and solidifies into the final plastic part.

The key steps in the injection molding process are:

  1. Clamping: The two sides of the mold are closed and clamped shut.
  2. Injection: The material is fed into the machine and pushed towards the mold. While this is happening, the material is melted by heat and pressure. The plastic is then injected into the mold — this is called the “shot.”
  3. Cooling: The plastic in the mold cools and solidifies into the shape of the part.
  4. Ejection: After the part cools, it is ejected from the mold.

Types of Injection Molding

The most common types of injection molding are:

  • One-shot Injection Molding

Benefits of Injection Molding

Injection molding offers a number of benefits not found in other manufacturing processes. Due to the high-pressure nature of the injection molding process, it is much easier to manufacture parts with detailed features or complex geometries that would be too costly for typical CNC machining processes. The ability to use your mold over and over again for a long period of time leads to an extremely high production output rate which is more cost effective and efficient than other manufacturing processes. Lastly, different injection molding processes, such as overmolding and insert molding, allow you to create plastic parts with unique characteristics such as enhanced strength, soft-grip surfaces, or added flexibility. Also beneficial is the ability to combine multiple assembly processes into one injection molding process.

The Benefits of Working With Xometry For Injection Molding

From simple parts to multi-component assemblies, Xometry combines the latest injection molding processes with our Instant Quoting Engine and an experienced injection molding manufacturing team to deliver high quality and defect-free injection molded parts. Xometry utilizes a network of over 2,400 manufacturing partners, including a wide range of dedicated injection molding partners. Our partners provide services from tool design and mold-making to prototyping and production runs.

With Xometry you own the mold, providing you with greater flexibility and control over your manufacturing process. Get injection molded parts your way — not subject to someone else's production constraints.

Other benefits include:

  • Quotes in 24 hours
  • First Article Inspections/Dimensional reports/PPAP
  • ISO9001 & ISO13485
  • Machine presses in the 50 to 2,000-ton range
  • Variety of mold construction and mold materials
  • Tight tolerances
  • Insert molding
  • Overmolding
  • Multi-cavity, family molds
  • Unlimited undercuts
  • Custom colors
  • Complex and large parts
  • All industry standard materials available

Featured Injection Molding Resources

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Machine Hours
13MM+
Parts Quoted
500k+
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