Custom Plastic Injection Molding Services from China
Get precision-engineered custom plastic parts with fast turnaround and consistent quality from Fuming in China. We support prototype and low-volume production with lead times as fast as 2–4 weeks, and scale efficiently to full production runs. With over 20 years of experience serving European and North American clients, we deliver reliable manufacturing solutions tailored to your needs.
- Tolerances down to ±0.025 mm
- Wide selection of engineering plastics
- In-house mold making and molding
- ISO 9001:2015 certified
- Full NDA protection for all projects
Plastic Injection Molding for Diverse Applications
We provide comprehensive injection molding services, encompassing both mold fabrication and parts production. From consumer electronics and medical devices to industrial components, our solutions support a wide range of applications with consistent, dependable results.
Custom Injection Molding Capabilities
From initial concept through high-volume production, your plastic components are manufactured with precision and repeatability. Every stage—from design to final manufacturing—is streamlined to save time, lower costs, and guarantee dependable delivery.
Product Design
We refine your product designs based on samples or 2D/3D files, enhancing manufacturability and functionality. This minimizes potential redesigns and ensures your components can be efficiently produced at scale.
Mold Design
Our experienced engineers design durable, high-performance molds. Utilizing mold flow analysis, we reduce defects and extend mold life, lowering long-term production costs.
Mold Making
We select premium-quality steel and employ precision machinery to manufacture molds that meet tight tolerances. Reliable tooling means fewer production interruptions and consistent part quality.
Plastic Injection Molding
From prototype through mass production, we deliver components that meet your specifications. Our efficient processes and advanced molding technologies minimize waste and reduce production costs.
Insert Molding
Insert molding integrates additional materials into your plastic parts, improving durability and reducing assembly steps—providing more efficient and reliable solutions.
Overmolding
Overmolding enables multi-material combinations, offering enhanced product functionality, comfort, and aesthetic appeal—ensuring your parts stand out.
Liquid Silicone Rubber Molding
A precision molding process for flexible, durable, and biocompatible components—ideal for medical, automotive, and consumer applications.
Rapid Tooling
With rapid tooling, we provide quick mold fabrication, allowing you to accelerate production timelines and meet tight deadlines without compromising quality.
Flexible Injection Molding Solutions
At Fuming, we understand that speed and reliability are essential to your product’s success. Our injection molding solutions support every stage of development—from rapid prototype production to high-volume manufacturing and export-ready molds—each tailored to your specific requirements.
Prototyping Injection Molding
Quick-turn injection molding for design validation and functional testing. We support tight tolerances and engineering-grade materials—ideal for fast iterations before scaling up.
Low-Volume Injection Molding
Flexible production starting from just 50 units. Perfect for pilot runs, market testing, or bridge tooling between prototyping and mass production.
Mass Production
Scalable molding solutions with multi-cavity tools and automated processes. Optimized for cost-efficiency, consistency, and long-term supply requirements.
Export Molds
Precision-built molds tailored for overseas manufacturing. Delivered with full documentation, tool validation, and ongoing engineering support to ensure seamless integration at your production site.
Why Choose Our Injection Molding Services?
Bring your concepts to life with comprehensive on-demand manufacturing solutions.
Experienced Team
With over 20 years of experience in injection molding, we deliver precision and dependability on every project—including complex components.
Fast Turnaround
We recognize the importance of timely delivery. Our efficient lead times ensure your parts arrive on schedule, every time.
Quality Assurance
Our rigorous quality control system guarantees exceptional quality for both prototypes and production parts, providing you with complete confidence.
Cost-effective Solutions
We offer economical solutions without sacrificing quality, ensuring the best possible return on your investment.
Beyond Injection Molding – Fuming
From prototypes to full-scale production, Fuming delivers comprehensive manufacturing services from China, including CNC machining, injection molding, mold making, 3D printing, and sheet metal fabrication.
Founded in 2002, Fuming is the manufacturing service brand of Shenzhen RJC Industrial Co., Ltd. Headquartered in Shenzhen, we have assembled an experienced engineering and production team that oversees every project—from concept to finished component—with precision and accountability, ensuring consistent quality and on-time delivery.
To better serve North American customers, we established RJC AMERICAN INC in California in 2021, providing local support for order management and project coordination.
With our full manufacturing capabilities under one roof, you can transition seamlessly from prototyping to production, streamline supplier management, and control costs—all while leveraging China’s efficient manufacturing ecosystem.
About Fuming →
20+
Years in Business
150+
Team Members
10,000+
Projects Completed
3,000+
Companies Served
50+
Countries Shipped
Ready to Get Started?
Upload your design files to receive pricing and lead time estimates within 12 hours on business days. Our team is ready to bring your parts to life.
Client Testimonials
Discover what businesses that rely on us have to say
Throughout your injection molding project
we collaborate closely with you at every phase—from initial design through final delivery—to ensure a seamless workflow and results that fulfill your requirements.
Design & Concept Development
Work alongside our engineering team to turn your concepts into manufacturable designs. We develop and refine detailed 2D/3D models, ensuring cost-effective production from the start.
Mold Design & Manufacturing
Precision begins at the tooling stage. We engineer molds using advanced analysis and high-accuracy machining, delivering durability and consistent performance.
Injection Molding Production
Flexible production volumes tailored to your requirements. Whether prototypes or full-scale manufacturing, we maintain consistent quality with optimized processes.
Quality Control & Delivery
Every component undergoes thorough inspection for accuracy and reliability. Reliable shipping guarantees your parts arrive on schedule, every time.
Key Injection Molding Parameters
Obtain a concise summary of essential specifications and capabilities to streamline your injection molding project planning.
| part size | 5×5×5 mm to 1200 × 1000 × 500 mm |
| Tolerance | Best achievable tolerance: ±0.001″ (0.025mm); Standard: ±0.005″ (0.127mm); For larger part tolerances please contact us |
| Lead time | Most orders can be completed within 2–4 weeks, depending on part complexity |
| Tool validation | Standard process is to produce a small set of T1 samples for approval before initiating full production |
| Mold Cavities | Single-cavity molds, multi-cavity molds, family molds |
| Secondary Operations | Mold texturing, pad printing, laser engraving, threaded inserts, and basic assembly |
FAQs About Injection Molding
Find answers to frequently asked questions about our services, pricing, lead times, and more. Can’t find what you’re looking for? Reach out to us for personalized assistance.
Injection molding is one of the most efficient and scalable manufacturing processes for plastic parts. Here’s a balanced view of its strengths and limitations—along with how Fuming helps you maximize its potential.
Advantages:
Cost-effective for medium to high volume production: Once the mold is built, parts can be produced rapidly with low unit cost—ideal for scaling up.
Consistent part quality: Injection molding delivers repeatable accuracy, excellent dimensional stability, and clean surface finishes—even for complex geometries.
Wide material selection: Supports a broad range of thermoplastics, including ABS, PC, PP, PA, and filled materials for enhanced mechanical properties.
Flexible surface treatments: From textured mold finishes to post-molding processes like painting and plating, Fuming offers end-to-end finishing options.
Low waste: Compared to CNC machining or 3D printing, injection molding generates minimal material scrap.
Limitations:
| Limitation | Our Solution |
|---|---|
| High upfront mold cost | We offer rapid tooling and bridge molds to reduce initial investment for small runs. |
| Longer lead time for mold fabrication | Our in-house mold shop ensures fast turnaround—typically 2–3 weeks, with expedited options available. |
| Design changes after tooling are costly | Our engineers support early DFM (Design for Manufacturability) reviews to minimize risk before mold cutting. |
| Not ideal for very low quantities | For prototype or low-volume needs, we also offer Vacuum Casting, CNC machining, and 3D printing as flexible alternatives. |
In summary, injection molding is highly efficient when you need precision parts at scale. And with our fast tooling, flexible production volumes, and engineering support, we help you overcome common limitations and move from idea to production—faster and more reliably.
Not sure if injection molding is the right fit?
Book a consultation with our engineering team—we’ll help assess your project and recommend the best path forward.
We manage quality throughout the entire lifecycle of your project—not just at final inspection.
1. DFM Review & Moldflow Simulation
Before mold manufacturing begins, our engineering team performs DFM analysis and, when necessary, flow simulation to identify potential issues related to wall thickness, draft angles, or gate locations.
2. Mold Fabrication Control
During tool fabrication, we verify the accuracy of mold components—including cores, cavities, and electrodes—to ensure dimensional precision prior to trial runs.
3. Mold Trials (T0, T1, T2)
Each mold undergoes controlled trial shots. We evaluate part quality, fine-tune molding parameters, and provide samples (such as T1) for customer approval. All adjustments are tracked and documented.
4. Engineering Validation
Critical dimensions and surface finishes are validated. We may conduct Design of Experiments (DOE) studies to confirm process repeatability and consistency.
5. In-Process Quality Monitoring
During production, we implement:
First-article inspection (FAI) for each batch
Ongoing SPC checks on key dimensions or cosmetic criteria
Regular equipment calibration and tool wear monitoring
6. Final Inspection & Delivery Control
Prior to shipment, we conduct comprehensive appearance and dimensional inspections. Reports, certificates, and customer-specific QC plans are available upon request.
To provide an accurate quote, please include:
Material type
Estimated quantity
Surface finish requirements
Mold information, if available (e.g., existing tool or need for new mold)
Drawings (2D or 3D) are highly recommended
No drawings? A physical sample or photos with basic dimensions can also help us evaluate your project.
Not sure about all the details? Just share what you have—or book a meeting with our engineers for support. Contact us.
The lead time for mold manufacturing generally ranges from 2 to 3 weeks, depending on the complexity and size of the mold. Simple molds may require less time, while multi-cavity or highly detailed molds can take longer.
| Mold Class | Purpose | Shot Life | Tolerance | Lead Time |
|---|---|---|---|---|
| Class 105 | Prototype Testing | Under 500 cycles | ± 0.02mm | 2-3 weeks |
| Class 104 | Low-volume Production | Under 100,000 cycles | ± 0.02mm | 2-3 weeks |
| Class 103 | Low-volume Production | Under 500,000 cycles | ± 0.02mm | 2-3 weeks |
| Class 102 | Medium-volume Production | Under 1,000,000 cycles | ± 0.02mm | 2-3 weeks |
| Class 101 | High-volume Production | Over 1,000,000 cycles | ± 0.02mm | 3-4 weeks |
We offer expedited tooling services for projects with tighter schedules—please contact us to discuss your timeline.
Injection molding is compatible with a wide range of engineering plastics. The materials listed below offer various mechanical, thermal, and aesthetic properties, enabling the production of parts from simple housings to complex functional components. If you have specific material requirements, our engineering team can provide tailored advice.
| Common Thermoplastic Materials | Other Supported Materials | Additives and Fiber |
|---|---|---|
| Acrylonitrile Butadiene Styrene (ABS) | Nylon (PA 6, PA66, PA12) | UV absorbers |
| Polyethylene (PE) | Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS) | Flame retardants |
| Polypropylene (PP) | Polyurethane (PU) | Plasticizers |
| Polycarbonate (PC) | Polymethyl Methacrylate (PMMA/Acrylic) | Colorants |
| Polystyrene (PS) | High Density Polyethylene (HDPE) | Glass fibers |
| PEEK | Low Density Polyethylene (LDPE) | |
| POM (Acetal/Delrin) | ||
| Polyethylene Terephthalate (PET) | ||
| Thermoplastic Elastomer (TPE) | ||
| Thermoplastic Vulcanizate (TPV) | ||
| Polyetherimide (PEI) | ||
| Polysulfone (PSU) |
Inquire for additional options
Our injection molding services include various surface treatments such as polishing, sanding, painting, plating, and silk-screen printing. These options enhance part appearance, improve durability, or provide specific functional characteristics. Please specify your surface finish requirements when requesting a quote from Fuming.