The Top Chinese Injection tooling & Molding Partner
Custom Injection tooling & Molding Services
Get innovative injection molded parts with RPD. We provide custom molds designed to your exact specifications from prototype to production at competitive prices with fast lead times. Our experts handle the complexity，help you get to market faster. Ready to elevate your production? Let’s go !
- RPD Provide 24/7 Engineering Support All Year Round.
- All tools and dies are engineered and produced in house
- More Than 60+ Certified Materials for Choose. Offer CoCs, Material Certifications, Inspection Reports.
- ISO 9001:2015 quality standards.
- Expert DFM & process optimization
What is Injection tooling & Molding?
Injection molding is a manufacturing process for producing plastic parts in volume by injecting molten material into a custom-made mold (the “tooling”). The mold is precision-machined to the exact shape of the desired part. Once the plastic cools and solidifies, the mold opens and ejects the finished part.
The mold is a tool created in advance to produce these plastic parts. It is typically made from durable, wear-resistant materials such as tool steel or stainless steel. Molds are widely used in industrial production due to their long service life and ability to mass-produce plastic products efficiently.
What’s advantages of Injection tooling & Molding?
Consistent Quality & High Repeatability
Tooling produces identical parts every cycle， part #1 and part #1,000,000 are nearly the same. This minimizes scrap, reduces rejects, and ensures reliable quality for high-volume production.
Very High Production Speed
Tooling enables extremely fast cycle times: injection molding in seconds, Without tooling, each part would take hours (machining, manual fabrication).
Low Cost when High Volume
High upfront tooling cost is spread across tens of thousands to millions of parts. The more you produce, the cheaper each part becomes pennies at very high volume.
Minimal Material Waste
Tooling-based processes (injection molding, die casting, stamping) achieve 85–99% material utilization, far better than CNC machining. Less scrap means lower material cost plus better sustainability.
Complex Geometries & Fine Details
Tooling produces intricate shapes, thin walls, undercuts, threads, and surface textures that would be impossible or extremely expensive to machine individually. All features are built into the mold or die.
Automated Operation & Wide Material Range
It works seamlessly with robotic part handling and inspection systems, reducing labor costs and enabling lights-out manufacturing. Material versatility, works with both plastic and metal, even composite materials.
Injection Tooling & Molding Capabilities to Mass Production
Rapid Tooling & Molding Services
Aluminum or soft steel (P20)
Lead time: 1–4 weeks
Lifespan: 1k–100k shots
Best for: Prototypes, design iteration, low-volume production
Production Tooling & Molding Service
Hardened steel (H13, S136, S136, 718H, etc)
Lead time: 6–10 weeks
Lifespan: 100k–2M+ shots
Best for: High-volume, long-run manufacturing
Why Choose RPD?
Professional CNC Machining, sheet fabrication, Injection Molding & rapid prototyping, Professional Services, Comprehensive A-Z Solutions.
Guaranteed Quality & Rigorous Inspection
Advanced Technology & Broad Capabilities
Technical Partnership & Engineering Support
Wide Material/Project Experience
Competitive Value & Cost Optimization
Speed & On-Time Delivery
Injection tooling & Molding Material
We believe in using the highest quality materials for your tooling and molding project will booster your business. It’s important that your punch pressed parts are able to withstand the demands that will be put on them every day.
For Injection tooling, the tooling material including: tool steel，Stainless Steel, Aluminum, say S136, S136H, P20, NAK80, 718, 718H,316L, 6061, 7075, etc.
We offer a wide selection of industrial-grade materials for both prototyping and production, including common plastics like ABS, PC, PP, and PA, as well as high-performance, temperature-resistant options such as PEI and PPS. Visit our Material Guide for selection tips and recommendations.
Understanding material grades, properties, and trade-offs is key. Let us help you select the right material for your application. Contact us to explore more materials today!
ABS
ABS bridges the gap between engineering and commodity plastics offering excellent strength, great surface finish, easy processing, and low cost. That's why it's the go-to material for automotive, electronics, consumer, and industrial parts. More Metals
PE
PE processes easily and keeps costs low. It may not match engineering plastics in heat resistance or stiffness, but its chemical resistance, flexibility, and affordability make it ideal for packaging, containers, and consumer goods — balancing efficiency and cost. More Metals
PP
PP is the most widely used commodity plastic, known for heat resistance, flexural endurance, and chemical resistance. Strong yet flexible, it's the go-to material for food-contact products from containers and appliances to medical and automotive parts. More Metals
PS
PS is a typical hard and brittle material. Due to its high transparency, easy processability, dimensional stability, and extremely low cost, it is widely used in disposable consumer goods such as stationery, tableware, and home appliances. More Metals
PA/Nylon
With excellent wear resistance, self-lubrication, high tensile strength, toughness, and resistance to oils and most solvents (though moisture-absorbent), this material is ideal for injection-molded parts like gears, bearings, and automotive intake manifolds.
PC
Featuring excellent transparency, high impact resistance, good heat resistance, and dimensional stability, this material is well-suited for injection molding mobile phone cases, automotive lens covers, water containers, and medical housings.
POM
Offering high rigidity and hardness, it is known as "steel-like plastic". It features a very low coefficient of friction, excellent wear resistance, strong fatigue resistance, and good resilience. These properties make it ideal for injection molding precision parts such as gears, bearing cages, and valves.
PET
Food contact safe, non-toxic, and odorless, this material delivers good rigidity, creep resistance, high-temperature stability, and resistance to oils and most solvents. It's an ideal choice for applications in medical, electrical enclosure, and automotive sectors.
PEEK
A top-tier high-performance plastic, it withstands 260°C continuous use and resists nearly all chemicals. With excellent radiation/hydrolysis resistance, flame retardancy, and high strength, it's ideal for aerospace, medical, and petrochemical applications.
PEI
This amber, semi-transparent plastic resists heat up to 210°C and is inherently flame-retardant，no additives needed. With high strength, rigidity, and resistance to hydrolysis and most chemicals, it's ideal for medical devices, electronic connectors, and aerospace interiors.
PPS
Withstanding up to 260°C, PPS delivers excellent chemical resistance, inherent flame retardancy, high rigidity, and dimensional stability. It's ideal for under-hood automotive parts, electronic connectors, pumps, valves, and microwave brackets.
Our Injection tooling & Molding capabilities
Contact us to explore more opinions today!
| Item | Details |
| Injection Molding Material | ABS,PC,PP,PPS,PEEK,PMMA(Acrylic),POM(Acetal/Delrin),HDPE,PTFE(Teflon),TPU,PVC,PET,PBT,PA(Nylon),etc |
| Lead Time | 2-5 weeks for tooling and 1-2weeks for injection molding |
| Machines & Mold Types | 50T – 1100T machines; single/multi-cavity & family molds; steel & aluminum molds. |
| Part Size Range | 5 × 5 × 5 mm to 1200 × 1000 × 500 mm |
| Tolerances & Precision | Mold cavity tolerance ±0.02 mm; part repeatability ±0.1 mm. |
| Wall Thickness & Features | 0.5 mm – 5 mm walls; 0.5° – 2° draft; undercuts, ribs, gussets, bosses. |
| Production Volumes | Prototype to mass production (up to 100,000+ cycles). |
| Secondary Operations | Mold texturing, pad printing, laser engraving, threaded inserts, assembly. |
| Inspection Standard | ISO 9001, 5 steps inspection |
| Mold Class | Purpose | Shot Life | Tolerance | Lead Time | Cost |
| Class 105 | Prototype Testing | Under 500 cycles | ± 0.02mm | 1-2 weeks | $ |
| Class 104 | Low-volume Production | Under 100000 cycles | ± 0.02mm | 2-3 weeks | $$ |
| Class 103 | Low-volume Production | Under 500000 cycles | ± 0.02mm | 2-3 weeks | $$$ |
| Class 102 | Medium-volume Production | Under 1000000 cycles | ± 0.02mm | 3-4 weeks | $$$$ |
| Class 101 | High-volume Production | Over 1000000 cycles | ± 0.02mm | 4-5 weeks | $$$$$ |
Injection Mold Surface Finishes
| SPI A | SPI B | SPI C | SPI D | |
| Description | Mirror finish with exceptional smoothness and reflectivity. Ideal for high-end consumer products, optical components, and applications requiring pristine surface quality. | High gloss finish with excellent surface quality and minimal visible tool marks. Perfect for automotive parts, electronics housings, and premium consumer goods. | Semi-gloss finish with good surface quality and moderate tool marks. Suitable for general purpose applications, household items, and cost-effective production runs. | Matte finish with visible tool marks and textured appearance. Ideal for industrial applications, prototypes, and products where surface finish is not critical. |
| Finishing Look | High Gloss | Semi Gloss | Low Gloss | Matte |
| SPI Finish Grades | SPI A1, A2, A3 | SPI B1, B2, B3 | SPI C1, C2, C3 | SPI D1, D2, D3 |
| Surface Roughness Ra (μm) | SPIA1: 0.012 to 0.025 SPIA2: 0.012 to 0.025 SPIA3: 0.05 to 0.10 | SPI B1: 0.05 to 0.10 SPI B2: 0.10 to 0.15 SPI B3: 0.28 to 0.32 | SPI C1: 0.35 to 0.40 SPI C2: 0.45 to 0.55 SPI C3: 0.63 to 0.70 | SPI D1: 0.80 to 1.00 SPI D2: 1.00 to 2.80 SPI D3: 3.20 to 18.0 |
Custom Parts For Different Industries
Provide CNC Machining One-Stop Services for Different Industries
Our Customers
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Which Process Should I Choose？ Injection Molding vs. Other Manufacturing Methods
| Process/Method | Description | Best For | Key Benefits | Typical Lead Time |
| CNC Machining | Removes material from a solid block | High precision, tight tolerances, any quantity | MOQ 1 piece and fast delivery, no need mold | 3–10 working days |
| 3D Printing | Builds layer by layer | Complex internal structures, prototypes, low volume | MOQ 1 piece and fast delivery, no need mold | 1–3 working days |
| Injection Molding | Injects molten material into a mold | High-volume plastic parts | For mass production parts, cost-effective | 15–25 working days |
In summary: CNC machining is the go-to manufacturing process when you need high precision, tight tolerances, wide material selection, and reliable repeatability，from one-off prototypes to production runs of thousands of parts.
Would you like to start a project with us?
End-to-End 6D Solutions, From Concept to Mass Production. Integrated 5 Steps Quality Control Across Every Stage.
Phase 1: DFM & Material selection
The process encompasses: conducting a product feasibility analysis, specifying the manufacturing processes and mold materials, establishing tolerance standards, and formulating cost optimization strategies.
Phase 2: Mold Design
The scope includes leveraging mold flow analysis, design simulation, and structural optimization to guarantee high performance and superior manufacturability.
Phase 3: Mold Manufacturing
Encompasses precision manufacturing processes, including CNC machining, EDM, texture，assembly, polishing, etc, each executed to exacting standards.
Phase 4: Mold Testing
De-risks production by using in-house trials to verify mold function and confirm part quality.
Phase 5: Sample Confirmation
Before the final approval, provide the customers with satisfactory samples for evaluation and feedback.
Phase 6: Mold & Parts Delivery
Upon customer approval, molds will be either shipped or retained in-house for batch production and free maintenance.
How can we work close with our client?
A – Z Assistance:
1)Our professional team will provide 24/7 Engineering Support
by one-on-one assistance.
2)Our experienced engineers will freely review and optimize your part designs (DFM), provide actionable feedback, and deliver competitive quotations, which all based on your design drawings, application requirements, and desired outcomes.
4)Throughout production, you’ll receive progress updates every 2–3 days.
5) Upon completion, we’ll share high-quality photos of finished parts and packaging, along with full documentation: inspection reports, shipping details, and material certifications.
Injection Tooling & Molding with Expert DFM & Engineering Support
What Our Engineering & DFM Support Includes?
Design Review
Analyze CAD models for manufacturability, tolerance feasibility, and material suitability
Material Selection
Recommend the optimal metal, plastic, or composite based on strength, cost, and application needs。
Design Optimization
Adjust sharp corners, deep cavities, thin walls, or hard-to-machine details for efficient production
Tolerance Analysis
Ensure critical dimensions are achievable while avoiding unnecessarily tight tolerances that drive up cost
Tool Access Check
Identify features that may require special tooling or 5-axis machining
Cost Reduction Suggestions
Propose design changes that reduce cycle time, tool wear, or secondary operations
How to work with RPD?
Upload Design Drawing
- Send 2D/3D drawing online or by email
- Design Drawing format: STEP, IGES, DWG, PDF, STL, etc
- If you have multiple files, zip them or send by email to ashley@rdpmfg.com
DFM Analysis & Quote
- Our engineer team will review & analyze every file carefully.
- Request more details or provide optimize solution.
- Offer accurate quote with 6 hours.
Order Confirmation
- Confirm order & delivery details, sign the contract.
- Arrange & start to production.
- Check and confirm all details during production, Track every steps.
Parts Delivered
- Control quality during production.
- Provide order photos,inspection sheet and other request documents.
- Pack & label orders, then shipping.
FAQs About Our Injection tooling & Molding Services
Why Tooling?
Tooling is the foundation of high-volume, repeatable manufacturing. Tooling turns a slow, manual process into a fast, automated, high-volume production system. If you need mass production, you must be choose tooling and molding production.
What kind of equipment do you use?
The molding workshop includes EDM, wire EDM, 50+CNC machining center, 50+injection machines ranging from 80 to 1000 tons, ect to meet different production requirements. Request equipment list, contact our team: ashely@rpdmfg.com.
Do you support export mold or production?
Yes, exactly. We support both. You can either for use at your own facility or leave it with us for long-term molding production.
What is your quality control system?
We operate under a rigorous Quality Management System (QMS) aligned with ISO standards. Our 5 Steps QC process is including IQC (Incoming Quality Control) , FQC (Final Quality Control) , OQC (Outgoing Quality Control) for routine production.
QE (Quality Engineering) / CAPA (Corrective and Preventive Actions) implemented throughout the entire product lifecycle, especially during the post-sale stage, to drive continuous improvement. Simply speaking 100% inspection before shipment to ensure zero defects.
What kind of quality assurance or warranty do you offer on orders?
One of the reasons engineers purchase from RPD is that we take on all the risks for you. We guarantee you’ll love what you get. Not happy with it? We’ll either redo it or give you a full refund. Your purchase is completely risk-free.
Why injection tooling is so expensive?
Material – Hardened steel (costly but durable for high volume)
Complexity – CNC, EDM, polishing; multi-cavity, undercuts add cost
Precision – Tight tolerances require advanced equipment & skilled labor
Customization – Every mold is custom-built for a specific part
Engineering – Significant design time for cooling, ejection, and geometry
Which kind of file formats can I send for tooling& production?
We accept STEP, IGES, STL, DWG, DXF, and other common CAD formats.
What Factors will Influence Tooling Design?
1. Part Geometry – Shape, size, and complexity drive mold design. Thin walls, intricate details, and complex geometries require specialized features like additional cooling or advanced gating systems.
2. Material Selection – The plastic type affects cooling rates, shrinkage, and flow. Polypropylene shrinks more; polycarbonate needs higher mold temperatures. Abrasive or corrosive plastics also demand wear-resistant mold materials.
3. Tolerances & Precision – High-precision parts (automotive, medical) require tighter mold tolerances — which complicates design and increases cost.
4. Ejection System – Ejector pins, air blasts, or stripper plates must be carefully integrated to remove parts without damage — affecting both design and cycle time.
5. Gate Design – Gate type and location (direct, pin, edge) control how molten plastic enters the mold, impacting part quality, surface finish, and cycle time.
6. Undercuts & Parting Lines – Undercuts or complex shapes may require side actions or lifters to release the part, increasing mold complexity and cost.
Can we store the mold at your facility for future production orders? Do you provide free maintenance for the mold?
Yes, we offer two key benefits for molds set up at our facility: free storage and free maintenance.
CNC Resources
What is a CNC Machining Center?
A CNC machining center is an advanced, computer-controlled machine tool capable of performing multiple machining operations—such as milling, drilling, tapping, boring, and sometimes turning.
Ashely . March 9, 2026
How many kinds of Types in CNC Machining Centers?
There are at least 5 different CNC lathes type in Machining Centers: Vertical Machining Center, Horizontal Machining, 5-Axis Machining Center, Gantry / Bridge Mill, Turn-Mill Center (Multi-Tasking).
Ashely . March 9, 2026
What is CNC Machining?
CNC (Computer Numerical Control) machining is a subtractive manufacturing process in which pre-programmed computer software controls the movement of factory tools and machinery to remove material from a solid workpiece, creating a finished part or product.
Ashely . March 9, 2026