Precision Injection Mold Manufacturer
±0.002mm Ultra-High Precision Machining Capabilities
24H Comprehensive DFM Analysis & T1 Samples in 15 Days
ISO9001 & TS16949 Certified In-House Manufacturing
We Have the Right Molding Setup for Your Specific Project
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.
Core Service
Standard Injection Molding
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
2-Shot & Multi-Material
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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Insert Molding
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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High-Output Stack Molds
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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Automatic Unscrewing Molds
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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Waste-Free Hot Runners
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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Micro-Pitch Connector Molds
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 MoreWhy Choose GBM Mold?
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
High-Speed CNC Machining
Precision Wire EDM
3D CMM Quality Inspection
Expert Mold Assembly
Automated Injection Production
Robotic Insert Placement
Custom Injection Molds For Diverse Applications
Providing robust, high-performance molded components across the world's most demanding industries.
Automotive
High-precision interior and exterior components meeting strict TS16949 standards for durability and safety.
Medical Devices
Cleanroom molding capabilities ensuring biocompatibility and exact tolerances for critical healthcare tools.
Consumer Electronics
Thin-wall molding and intricate connector housing for modern smart devices and wearables.
Industrial Equipment
Heavy-duty, wear-resistant polymer replacements for metal parts in harsh operational environments.
Injection Mold Solutions Tailored To Your Challenges
Complex Overmolding & Insert Design
- Advanced DFM to prevent insert displacement.
- Pre-heating strategies for optimal bonding.
- Custom automation for insert loading.
High-Tolerance Tooling Fabrication
- Imported Makino CNC & Sodick EDM machines.
- Machining accuracy maintained at ±0.002mm.
- Premium steel (H13, S136) for mold longevity.
Stringent Quality Assurance
- Hexagon CMM & OGP vision measuring systems.
- Comprehensive FAI (First Article Inspection) reports.
- ISO9001 & TS16949 compliant workflow.
Rapid Prototyping & Scale-Up
- T1 samples delivered in as fast as 15 days.
- Seamless transition from low-volume to mass production.
- In-house injection machines ranging from 50T to 1200T.
Choosing the Right Steel for Glass-Filled PA66 Molds
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) | 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 | 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 | 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. |
A Simple Guide to SPI Mold Classes & Steel Choices
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.
SPI Class 101
FOR NON-STOP PRODUCTIONBuilt 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.
Note: Hardened to 48-52 HRC to handle long, demanding runs.
SPI Class 102
FOR SOLID DAILY RUNSA 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.
Note: Good for tight tolerances and clean surface finishes.
SPI Class 103
FOR SMALLER BATCHESThe 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.
Note: Pre-hardened steels (28-32 HRC) for faster machining and lower initial cost.
Spotting Design Issues Early: Our DFM Process
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.
Checking Your Design for Molding Readiness
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.
Simulating the Plastic Flow
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.
Making Sure Parts Eject Smoothly
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 or damaged during ejection.
Preventing Surface Defects
By analyzing the cooling process and wall thicknesses, we proactively identify areas prone to sink marks, gas marks, and other surface defects. We adjust the tool design to ensure a flawless cosmetic finish for your final product.
What to Expect: Our Mold Building Timeline & Updates
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.
A Typical Mold Manufacturing Schedule
Delivered on TimeBased on a standard 30-day T0 timeline (Adjustable for complex parts)
Order & Review
Days 1-3Confirming order and checking part design (DFM)
Mold Design
Days 4-7Creating and approving 2D/3D mold drawings
Ordering Steel
Days 8-12Buying and prepping the right tool steel
Machining
Days 13-24Cutting and shaping the mold parts (CNC, EDM)
Assembly
Days 25-28Putting it all together and polishing
First Trial (T0)
Days 29-30Testing the mold and checking the first sample parts
How We Keep You in the Loop
You shouldn't have to chase us for updates. We'll tell you what's happening before you even have to ask.
Weekly Progress Reports
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.
Real Photos from the Shop Floor
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.
Ready to get your mold project started?
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.
We Use Real Test Data , Not Guesswork, to Set Up Your Production
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."
Testing How the Plastic Flows
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).
Locking in the Right Pressure
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.
Setting the Best Cooling Time
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 Ship Your Mold with Complete, Easy-to-Read Testing Reports
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.
CMM Measurement Report (FAI)
A clear report comparing the first molded samples directly against your 3D CAD drawing, proving we hit those tight ±0.002mm tolerances.
Original Steel Certificates
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.
Heat Treatment Records
Hardness test results (HRC) showing the steel was treated properly to handle hundreds of thousands of high-pressure injection shots without cracking.
Ready-to-Use Machine Settings
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.
About GBM
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.
Talk Directly To Our Factory
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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