We don't believe in a one-size-fits-all approach. Whether you need standard plastic covers, threaded bottle caps, or complex parts with metal inserts, we match your design with the exact molding process it needs to run smoothly and cost-effectively.
We turn raw plastic pellets into solid, consistent parts. From your first physical prototype to high-volume mass production, we tightly control the machine temperature and pressure so every single piece comes out identical and ready for assembly.
See How We Do It
We shoot two different plastics (like a hard base and a soft grip) in the same machine cycle, so they fuse together naturally without the need for manual gluing.
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We mold the hot plastic directly around pre-placed metal components (like threaded brass nuts or pins), locking them permanently in place for a much stronger part.
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Need a massive amount of parts fast? We build molds with two parting layers to double your daily output on the exact same machine, drastically lowering your per-part cost.
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Perfect for threaded caps and pipe fittings. Internal gears automatically unscrew the plastic part before it drops, keeping the delicate threads completely intact.
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By keeping the plastic melted all the way into the cavity, you don't waste material on scrap runners. It also cools faster, speeding up your entire production line.
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We cut the mold steel with extreme precision so those tiny pin holes and delicate features align perfectly every time for your electronics and automotive parts.
Learn More →Leveraging over 10 years of expertise and state-of-the-art facilities, we deliver certified precision injection molding solutions tailored for your most complex engineering challenges.
Explore Our Capabilities
Providing robust, high-performance molded components across the world's most demanding industries.
High-precision interior and exterior components meeting strict TS16949 standards for durability and safety.
Cleanroom molding capabilities ensuring biocompatibility and exact tolerances for critical healthcare tools.
Thin-wall molding and intricate connector housing for modern smart devices and wearables.
Heavy-duty, wear-resistant polymer replacements for metal parts in harsh operational environments.
Shooting Polyamide 66 with 30% glass fiber into a mold is almost like sandblasting the inside of it. The glass acts like sandpaper, which quickly wears down soft metals. To keep your parts accurate and stop the mold from wearing out prematurely, we build these specific tools using fully hardened tool steels.
| Mold Component | Recommended Steel Type | Target Hardness (HRC) | Why We Use It |
|---|---|---|---|
| Core & Cavity Plates (Main body of the mold) |
1.2344 (H13) / S136 / SKD61 | 48 - 52 HRC | These steels are tough enough to handle the glass fibers without cracking. We often use S136 because it also resists the corrosive gases that hot PA66 releases. |
| High-Wear Areas & Inserts (Corners and narrow gaps) |
VIKING / ASP23 / SKD11 | 54 - 58 HRC | Regular steel wears out too fast in areas where the plastic flows the fastest. We use powder metallurgy (PM) steels here because they offer extreme wear resistance. |
| Gate & Sprue Bushing (Where plastic enters) |
Tungsten Carbide / SKH51 | 58 - 62 HRC | This is where the plastic shoots into the mold at the highest speed and pressure. We use Tungsten Carbide to survive this intense, concentrated wear. |
| Sliders & Lifters (Moving parts) |
1.2344 (H13) + Nitriding | Surface > 60 HRC | Moving parts need to slide smoothly. We use a tough steel core so they don't snap, and add a hardened surface layer (nitriding) so the glass fibers don't scratch them up. |
Not sure which steel setup fits your budget and expected production volume? Send us your details. Our in-house engineers will review your design and provide a practical DFM analysis within 24 hours.
We build molds following Society of the Plastics Industry (SPI) standards, but more importantly, we help you pick the right steel for the job. Our goal is to balance your production targets with your budget, so you get reliable tooling without overpaying.
Built for continuous, high-volume runs. We use the hardest steels to handle heavy wear and tear, and design practical cooling layouts to keep your cycle times short and steady.
* Hardened to 48-52 HRC to handle long, demanding runs.
A practical choice if you need a lot of parts but aren't running the mold 24/7 forever. It hits a good sweet spot between how long the mold lasts and how much it costs to build.
* Good for tight tolerances and clean surface finishes.
The go-to option for lower volume runs. It’s more budget-friendly upfront because the steel is easier to machine, but it still gets the job done accurately.
* Pre-hardened steels (28-32 HRC) for faster machining and lower initial cost.
Our engineers provide 24H DFM analysis to recommend the most cost-effective mold class and steel grade for your specific volume requirements.
We don't just take your CAD file and start machining right away. Before any steel is cut, our team looks closely at your 3D design to catch potential molding headaches. Catching these issues early saves you from expensive mold modifications later and helps get your product to market faster.
We start by looking at the basics, like wall thickness and overall structure. If there's an area that might cause trouble or slow down injection molding, we'll flag it. We then suggest practical tweaks to make your part easier and more cost-effective to manufacture.
Before building the mold, we use software to see how melted plastic will actually fill the cavities. This helps us figure out the best spot to inject the plastic (the gate) and prevents common issues down the line, like trapped air, weak weld lines, or warped parts.
Parts need a slight taper (draft angle) so they can pop out of the mold without getting stuck. We double-check and adjust these angles to make sure your final parts don't get scratched, scuffed, or damaged when the mold opens.
Nobody wants finished parts with little dents (sink marks) or weird flow lines on the surface. We plan out the mold's cooling channels and pressure settings in advance to keep your parts looking clean and professional right out of
Building a mold takes time, and you shouldn't have to guess how it's going. We follow a clear schedule and keep you updated every step of the way, so there are no surprises and your project stays on track.
Based on a standard 30-day T0 timeline (Adjustable for complex parts)
Confirming order and
checking part design (DFM)
Creating and approving
2D/3D mold drawings
Buying and prepping
the right tool steel
Cutting and shaping the
mold parts (CNC, EDM)
Putting it all together
and polishing
Testing the mold and checking
the first sample parts
You shouldn't have to chase us for updates. We'll tell you what's happening before you even have to ask.
Every week, your project manager will send you a straightforward update. You'll see exactly what we finished, what we're working on right now, and what's coming next. We use simple charts so you can easily check if we are on schedule at a glance.
Seeing is believing. Along with your weekly notes, we send you actual photos and short videos of your mold being cut and put together. The pictures are date-stamped, so you know exactly what your tooling looks like in real-time.
Send us your 3D files. We'll take a look and get back to you with a practical design review (DFM) and a clear quote within 24 hours.
Data-Driven Process Optimization
Instead of adjusting machine settings by trial and error, our engineers test how the plastic actually behaves inside the mold. This approach ensures your parts come out identical every single time, without relying on an operator's "gut feeling."
We test how easily the melted plastic moves at different speeds. This helps us find the sweet spot for injection, preventing half-empty parts (short shots) or plastic leaking out (flash).
We measure exactly when the plastic freezes at the gate. This tells us exactly how much pressure to hold, which stops your parts from shrinking or getting ugly sink marks.
We figure out the exact seconds your part needs to cool down inside the mold. This ensures the part pops out perfectly straight without warping, while safely speeding up your daily production.
We want you to have peace of mind when the tooling arrives at your facility. You get actual data and certificates proving the steel quality, part dimensions, and the exact machine settings we used during our successful trials.
A clear report comparing the first molded samples directly against your 3D CAD drawing, proving we hit those tight ±0.002mm tolerances.
Proof that we used the actual requested steel brands (like ASSAB or LKM), so you know the mold will easily last for its promised lifespan.
Hardness test results (HRC) showing the steel was treated properly to handle hundreds of thousands of high-pressure injection shots without cracking.
A practical cheat sheet with the exact temperatures, speeds, and pressures we used, so your local operators can plug them in and start running immediately.
Let's look at your part design and discuss how we can set up a stable manufacturing process for you.
Talk to Our Engineering Team →Or call us directly at +86 15268369865
GBM Mold Technology Co., Ltd. is a premier one-stop precision injection mold manufacturer with over a decade of industry excellence. We specialize in transforming complex engineering designs into tangible, high-quality mass-produced components.
Equipped with state-of-the-art CNC machinery and strictly adhering to ISO9001 and TS16949 quality management systems, our in-house facility ensures uncompromising precision. From intricate connector molds to large automotive panels, we serve a demanding global clientele with robust export capabilities.
Send us your 3D/2D drawings or project details. Our senior engineering team will provide a comprehensive DFM analysis and accurate quotation within 24 hours.
Email Us
Annie@gbminjection.comCall Us
+86 15268369865Visit Us
Room 101, Jiumo Technology Park, Gangsheng Road, Yabian Village, Shajing Street, Baoan District, Shenzhen City
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