Injection Molding

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Rapid tooling and molding for small batch production. Ideal for enclosures, covers, and functional prototypes using ABS, PC, PA, or TPU. We provide expert DFM engineering reviews

your partner for mass production of plastic parts and fabrication of steel tools. Our production center is equipped with Plastic Injection Molding Machines for high volume runs and 3 Axis CNC Machines for cutting hard metals. A wide selection of engineering plastics in a variety of solid and tinted colors is available, example: (ABS, PC, PMMA, POM, PA, PET, PP, and PE).

Injection Molding

Injection molding is the most cost-effective way to make a plastic part at scale. The injection molding process involves injecting molten plastic into a mold tool, then ejecting the solidified part. This process quickly repeats hundreds or thousands of times, amortizing the cost of the mold tool and driving down the cost of each unit to a few dollars or less. Since the injection molding process uses the same mold tool for each part, it offers consistent quality across every part. Injection molding also has the highest variety of materials, colors, cosmetics, polishes, and surface textures when compared to CNC machining or even 3D printing.

Bridge the gap between prototype and volume production.

Design Guidelines

Feature	Tip
Undercuts	Reduce undercuts, which will increase the complexity and cost of the tool ejection mechanisms, by adding in pass-thru coring.
Wall Thickness	Prevent wall sink and voids by maintaining an even wall thickness. Thinner walls reduce cycle time and reduce costs.
Drafts	Ensure parts are designed with a minimum draft angle of 0.5°, or up to 5°, for faces with medium textures.
Ribs/Gussets	Ribs should be 40-60% the thickness of outer walls and should still maintain draft.
Bosses	Bosses should be designed at a depth of 30% the wall thickness and with a 30% edge groove. Attach them to side walls or ribs for structural integrity.

Injection Molding Services Capabilities

Service	Details
Lead Time	Starts at 5 business days, including fast quote responses with design-for-manufacturing (DFM) feedback
Production Options	Domestic and international
Materials	Most plastics, including custom sourcing and matching; see materials list below
Machines Available	Single, multi-cavity, and family molds; 50 to 3,700+ press tonnage; automated side actions or hand-loaded cores.
Inspection and Certification Options	Includes FAI and PPAP. ISO 9001, AS9100, ISO 13485, UL, ITAR, and ISO 7 and Clean Room molding.
Tool Ownership	Customer-owned with mold maintenance
Mold Cavity Tolerances	+/- 0.005″ when machining the mold and an additional +/- 0.002″ per inch when calculating for shrink rate
Part to Part Repeatability	+/- 0.004″ or less
Critical Feature Tolerances	Tighter tolerances can be requested and may increase the cost of tooling because of additional sampling and grooming. Xometry will mill to a steel-safe condition on critical features.
Available Mold Types	Steel and aluminum; Production grades range from Class 105, a prototype mold, to Class 101, an extremely high production mold. Xometry typically produces Class 104, 103, and 102 tools.

Applications

Rapid Prototyping

Low-cost tooling allows for rapid injection molding to be produced in as fast as 10 business days at affordable prices.

Production Parts

Custom injection molding can be the ideal process for low-volume production molding of 250 units to mass production molding of over 1,000,000 units. Plastic injection parts will generally perform better than the same part CNC machined or 3D printed using the same material. Careful selection of the resins allow for a wide range of properties and solvent compatibility. Molds are CNC machined to high precision, high tolerances and are able to produce thousands of identical parts with very small and intricate details.

Discover new possibilities

You can directly send the following data formats: Catia, NX, STEP, IGES, PRT, SLDPRT, DXF, and DWG.

We can convert CAD data formats so they are usable for production. Email:sales@golden-prototype.com