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Custom Injection Molding Services

We provide plastic prototyping and mass-production plastic parts worldwide. Upload your 3D files now to get our factory-direct pricing.

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ISO 9001:2015 | ISO 13485:2016 | IATF 16949:2016

Certifications

First Mold's Injection Molding Capabilities

We have over 15 years of experience in rapid plastic prototyping and scalable on-demand manufacturing. For every project, First Mold utilizes detailed DFM to eliminate potential injection molding defects. Furthermore, our capability to build at least 15 million-shot production steel molds monthly, provide all types of custom-level surface finishes, and perform 100% CMM inspections on molded parts allows you to get the parts you envision faster and worry-free.

Plastic Injection Molding

Insert Molding

Overmolding

Silicone Injection Molding

Family Molding

Two Shot Injection Molding

Consult Our DFM Engineers

Plastic Protoyping and Full Injection Molding Production

The success of any plastic part fundamentally relies on the fabrication of its injection mold. Generally, a customer’s project can be boiled down to two critical phases: rapid prototyping and full-scale mass production. While the core mechanics of mold making and injection molding are similar for both, the engineering details differ dramatically. These differences lie heavily in the choice of tooling material (Aluminum vs. Hardened Steel), mold architecture (single-cavity vs. multi-cavity), and the strictness of quality validation.

Standards	Plastic Prototyping	Plastic Parts Mass Production
Objective	Functional testing & design validation.	Market launch & continuous supply chain.
Recommended Volume	100 – 10,000 parts.	10,000 – 1,000,000+ parts.
Time to First Part (T1)	7 – 15 days.	3 – 5 weeks.
Mold Material	Aluminum or P20 soft steel.	H13, S136, or hardened steel.
Mold Life	Up to 10,000 shots.	1,000,000+ shots (SPI Class 101/102).
Mold Cavities	Single-cavity.	Single-cavity & Multi-cavity & Family molds (Up to 64+).
Part Unit Cost	Moderate (Optimized for speed).	Absolute lowest (Volume pricing).
Design Complexity	Best for simpler geometry.	Unlimited
Quality Documentation	Standard dimensional inspection.	100% CMM, FAI, and full PPAP.
Mold Ownership	100% owned by the client.	100% owned by the client.
Tooling Transferability	Fully transferable.	Fully transferable
Engineering Support	Basic DFM review.	1-on-1 Co-engineering & advanced Moldflow.

Injection Molding Materials

We work with over 100 standard and engineering-grade thermoplastic and thermoset materials. Beyond base resins, we fully support custom material modifications such as glass‑filled, mineral‑filled, flame retardant, toughened, and alloy grades

Rigid Thermoplastics

PC (PC+GF)
POM (POM-C / POM-H)
PA (PA6 / PA66 / PA11 / PA12)
PBT (PBT+GF)
PET (PETG)
PC / ABS
PC / PBT

Thermoplastic Elastomers

LSR Silicone

Explore 100+ Injection Molding Materials

Craft Perfection with a Click

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Custom Surface Finishes & Textures

In-Mold Finishes

Standard	Finish Category	Roughness Ra (µm)
SPI A1 – A3	Diamond Buff / High Gloss	0.012 – 0.10
SPI B1 – B3	Grit Paper / Semi‑Gloss	0.05 – 0.32
SPI C1 – C3	Stone Finish / Smooth Matte	0.35 – 0.7
SPI D1 – D3	Media Blast / Textured	0.80 – 18.0
VDI 3400 (12‑45)	EDM / Spark-Eroded Texture	0.40 – 18.0

Need help defining the exact cosmetic or functional finish for your part? Feel free to directly Consult Our DFM Engineers for project-specific recommendations.

Secondary Operations

Printing & Marking

Silk screening, pad printing, and laser etching

Painting & Coatings

Spraying, UV coating, and EMI/RFI shielding.

Plating & Metallization

Electroplating, Chrome Plating, Gold Plating, and PVD.

Injection Molding Applications

First Mold’s injection-molded components serve over a dozen industries, including automotive, medical, telecommunications, and home appliances, and extend into highly demanding fields such as surgical instruments, waterproof communication housings, and optical lenses. We primarily fulfill customer requirements through material selection, mold design, and our manufacturing philosophy. What we care about most is the part’s end-use environment and its functional integrity under real-world operating conditions.

Automotive

Medical Device

Aerospace

Consumer Electronics

All our parts are custom-produced, so the range of categories we cover is extremely broad. However, upon systematic review, these parts can still be grouped into several common functional types.

Enclosures & Housings: Outer shells, device covers, control panels, and protective electronic casings.
Structural & Chassis Components: Internal frames, load-bearing brackets, chassis, and heavy-duty machine guards.
Mechanical & Moving Parts: Internal gears, impellers, cams, levers, and high-wear sliding components.
Electronic Connectors & Fasteners: Terminal blocks, wire harnesses enclosures, snap-fits, clips, and threaded components.
Seals, Dampeners & Grips: Waterproof gaskets, O-rings, shock-absorbing bumpers, and ergonomic overmolded grips.
Optical & Clear Components: Light guides, precision lenses, display screen windows, and clear sensor covers.

Why Partner With First Mold?

Solve issues before molding, not after.

Since we identify and resolve defects during DFM with cost/timing estimates, your first trial run becomes production-ready rather than rework-prone.

CPK health reports provided on request.

Because we maintain full process data for every batch, CPK health reports are available upon request to show entire-batch consistency beyond sample checks.

Industry You Can Trust

With one technically skilled project lead who has decision authority, any change is handled by a single person without repeating across departments.

Two Facilities, 50+ Injection Molding Machines

With injection molding centers in both China and Mexico, First Mold is well-positioned to conveniently serve its global customer base.

China Manufacturing Hub

Our China manufacturing base is equipped with over 50 injection molding machines ranging from 90T to 1000T. This facility focuses on handling complex tooling, high-volume mass production, and strict-tolerance components.

Explore Chinese Base

50+ Machines

1000T Press

Automated Line

Mexico Facility

Our Mexico facility features over a dozen advanced injection molding machines. It is specifically set up to serve North American buyers with rapid tooling and plastic prototypes.

Explore Mexico Base

Molding Floor

Rapid Tooling

QC Lab

Craft Perfection with a Click

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4 Steps to Get Your Plastic Parts

Custom injection molding is highly technical, but ordering it shouldn’t be. Upload your 3D CAD, and our team will handle the heavy lifting from engineering to global delivery.

Quote & DFM Analysis

Upload your CAD files securely. Within 24 hours, you will receive a comprehensive quote and a free DFM report

Tooling Fabrication & T1 Samples

Once specs are locked, we machine your custom mold. We then run physical T1 trial samples and send them to you.

Mass Production & Real-Time QC

We launch full-scale production. Automated presses and CMM inspection routines for uncompromising consistency.

Finishing & Global Logistics

We handle any required surface finishing and assembly. Finally, parts are shipped from our China or Mexico hubs to your dock.

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FAQ For Injection Molding Services

How much does a custom plastic injection mold cost?

It depends entirely on part size, geometry, and how many parts you need the mold to produce. A simple rapid tool might cost a couple of thousand dollars, while a high-cavity, high-volume automotive mold can run into the tens of thousands. Send us your 3D file and you’ll get an accurate quote within 24 hours — no guesswork, no hidden fees.

What is your minimum order quantity (MOQ) for custom injection molding?

Typically, you’ll start to see real unit cost advantages at volumes over 500 pieces. But if you only need a few hundred for market testing, we can use a rapid tooling approach to keep your initial investment low. There’s no hard threshold — we work out the most cost-effective option for your specific situation.

Who owns the injection mold tooling after it is built?

You do. If you paid for the mold, the tooling is 100% yours. We’re happy to store and maintain it for free, but you can pull it at any time. This is clearly stated in our agreement, no fine-print tricks.

What progress reports will I receive during mold fabrication?

You won’t be left guessing. You’ll receive updates at four key milestones:

Design complete: DFM and 3D mold design for your approval.
Rough machining done: Photos showing the mold base taking shape.
Before T0 trial: A confirmed T0 trial schedule.
After T0 trial: Physical T0 samples shipped to you, plus dimensional reports and process parameters.

And throughout the build, just ask — our engineers can snap photos or shoot short videos for you on the spot.

How do you handle plastic part design changes (ECN) after tooling approval?

We know late changes are expensive, so we’ll assess the impact quickly once you raise an ECN. Minor tweaks — like adding a rib or reducing material — we often handle at cost or sometimes even free. For larger changes, we’ll review the steel modification plan and cost with you immediately, then execute fast so your launch isn’t delayed.

What happens if the injection mold wears out during mass production?

Any mold we build is covered by a free warranty against normal, non-misuse wear within its designed lifespan. During production, we monitor tool condition proactively, so we’ll alert you about preventive maintenance before an issue surfaces. If a problem does occur — even in the middle of the night — our repair team is on standby. You don’t need to chase us.

What ISO certifications do your injection molding facilities hold?

We hold ISO 9001 for quality management. For medical or automotive programs, we have the capability and systems aligned with ISO 13485 and IATF 16949. Certificates can be shared right away, and you’re welcome to audit us in person.

Can I transfer an existing injection mold to your facility for production?

Of course. We’ll start with a free mold condition assessment and provide a detailed trial report showing what needs maintenance or adjustment. Once the tool is verified, we can put it straight into production. We handle the entire transfer process — you just wait for good parts to arrive.