Custom Mold Making for Plastic Parts Top 10 Manufacturers in China 2025
Introduction – The Backbone of Plastic Product Manufacturing
Custom mold making is the foundation of modern plastic product manufacturing. From automotive components and consumer electronics to medical devices and packaging, precision molds ensure consistency, dimensional accuracy, and efficiency in high-volume production.
China remains the global leader in plastic mold manufacturing, thanks to its advanced machining infrastructure, cost efficiency, and ability to deliver both prototype and production molds. Whether you are a startup seeking prototype tooling or an established brand scaling up production, finding a reliable custom mold maker in China is key to success.
This article introduces the Top 10 Custom Mold Making Manufacturers in China for 2025 — companies known for high-quality mold design, precision machining, and global service capability.
What Is Custom Mold Making?
Custom mold making involves the design and fabrication of injection molds tailored to a client’s product geometry and production requirements. The process includes:
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Design for Manufacturability (DFM): Engineers analyze part design for molding feasibility.
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Mold Design: CAD/CAM modeling of core, cavity, gates, cooling lines, and ejection systems.
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Machining: CNC milling, EDM, wire cutting, and polishing to produce precision steel or aluminum molds.
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Trial Molding: T0–T2 sample runs for fine-tuning.
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Mass Production Support: Maintenance, mold repairs, and long-term tooling management.
High-quality molds guarantee tight tolerances, smooth surfaces, and long mold life — essential for cost-effective, repeatable plastic part production.
Top 10 Custom Mold Making Manufacturers in China (2025)
Below are ten of the most recognized companies providing custom plastic mold making and injection molding services in China.
1. Alpha-Mold – Expert in Precision Plastic Tooling and Injection Molding
Location: Dongguan, Guangdong, China
Contact: +86 15817600962 | info@alpha-mold.com
Alpha-Mold is a professional custom mold manufacturer integrating mold design, fabrication, and plastic part molding. With advanced CNC machines, EDM, and in-house quality inspection, Alpha-Mold serves clients in automotive, home appliance, medical, and consumer electronics industries.
Core strengths:
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Full-service mold design to injection molding
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Short lead time with in-house toolroom
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Prototype molds and multi-cavity production molds
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ISO 9001 quality management system
Why choose Alpha-Mold:
They combine rapid prototyping, mold making, and molding production — enabling fast project turnaround and high accuracy.
2. Sino Mould – Leading Plastic Mold Maker in China
Location: Huangyan, Zhejiang Province
Sino Mould is a top-tier manufacturer specializing in plastic injection molds, blow molds, and automotive tooling. With over 20 years of experience, they export thousands of molds annually to Europe, North America, and Southeast Asia.
Key services:
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Automotive interior and exterior molds
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Multi-cavity packaging molds
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Household and industrial product molds
Advantages:
Large-scale capacity, high precision tooling, and global after-sales support.
3. Aco Mold – Professional Injection Molding Partner
Location: Shenzhen, China
Aco Mold provides both custom mold manufacturing and injection molding production. They focus on export-grade tooling for international clients and offer DFM consulting to optimize product manufacturability.
Core expertise:
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High-precision mold design (steel/aluminum)
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Prototype and mass-production tooling
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Tolerance-controlled injection molding
4. First Mold Manufacturing Limited
Location: Dongguan, China
First Mold is known for complex mold structures such as 2K molds, insert molds, and over-molding. Their in-house machining center uses high-speed CNC, EDM, and CMM inspection to ensure dimensional accuracy.
Industries served: automotive, medical device, electronics, and packaging.
Highlight: In-house plastic part production, secondary processing, and assembly.
5. JasonMould Industrial Company Limited
Location: Huizhou, China
JasonMould offers custom plastic mold design and manufacturing, backed by a large facility with modern CNC and EDM equipment. They deliver molds for consumer electronics, home appliances, and industrial products.
Services:
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Custom mold design and production
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Rapid prototyping and molding
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Mold testing and modification services
Competitive edge: Strong engineering team and flexible production capacity.
6. DJ Molding Co., Ltd.
Location: Dongguan, Guangdong
DJ Molding specializes in precision injection molds and plastic parts for export markets. Their services include mold design, production, and plastic injection molding under ISO 9001 certification.
Core strengths:
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High-precision steel molds
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Tight-tolerance parts for medical & automotive sectors
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Mold flow analysis for optimized cooling & ejection
7. GM-Tec Co., Ltd.
Location: Shenzhen, China
GM-Tec is a well-known manufacturer offering rapid tooling and injection molding services for both prototype and production molds. Their engineering team works closely with customers from DFM to mass production.
Specialties:
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Rapid aluminum tooling
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Precision steel molds
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Injection molding for consumer products
8. Eco Molding Co., Ltd.
Location: Shenzhen, China
Eco Molding is recognized for producing durable molds with precise tolerances. They design molds for industries like electronics, automotive, and healthcare, focusing on both cost efficiency and quality assurance.
Advantages:
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Advanced DFM & mold flow simulation
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Automated machining and polishing systems
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Excellent overseas project management
9. RYD Tooling – Injection Mold Engineering Experts
Location: Shenzhen, Guangdong
RYD Tooling manufactures injection molds for global clients, offering in-house design, tooling, and injection molding. They are known for DFM optimization and fast sampling.
Capabilities:
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2K molding and insert molding
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Mold assembly and maintenance
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Professional project management team
10. Go4Mould – High-Precision Plastic Molds and Die Casting
Location: Zhejiang, China
Go4Mould focuses on precision plastic molds, die casting, and mold components. They support customers through mold design, engineering, machining, and mass production.
Industries: automotive, medical, industrial, packaging.
Strength: Advanced tooling facilities and excellent mold finishing.
Common Mold Types Offered by Chinese Manufacturers
| Mold Type | Description | Typical Use Case |
|---|---|---|
| Prototype Mold | Low-cost mold for testing designs | Early product development |
| Production Mold | Hardened steel mold for long production runs | Consumer goods, automotive |
| Insert Mold | Combines metal inserts with plastic | Electrical and mechanical components |
| Multi-Cavity Mold | Produces multiple parts per cycle | High-volume production |
| Overmold Tooling | For soft-over-hard material parts | Handles, seals, grips |
Why Choose China for Custom Mold Making?
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Cost Efficiency: Lower tool fabrication costs without compromising precision.
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Advanced Equipment: Five-axis CNC, EDM, and CMM inspection.
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Engineering Expertise: Decades of mold design experience for complex geometries.
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Scalability: From prototype molds to high-volume multi-cavity tools.
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Global Delivery: Mature export processes and logistics.
Quality Control & Engineering Standards
Reputable mold makers in China adhere to global quality systems like ISO 9001 and IATF 16949. They use:
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Mold Flow analysis before cutting steel
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CMM (Coordinate Measuring Machines) for precision measurement
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Mold trials (T0–T2) to ensure dimensional conformity
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Hardness, polishing, and wear-resistance testing
How to Work with a Mold Maker
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Provide 3D drawings (STEP/IGES files) and material requirements.
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Request DFM feedback to optimize your design for injection molding.
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Approve mold design drawings before machining begins.
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Request sample parts from T0 or T1 trials.
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Approve and ship molds or continue production with your supplier.
Final Thoughts
China continues to lead the world in custom mold making for plastic parts, offering unmatched value, precision, and scalability. Whether your goal is a prototype mold for product validation or a long-life production tool for mass manufacturing, the companies above are among the most trusted mold makers in 2025.
For a complete one-stop solution covering rapid prototyping, mold making, and injection molding, Alpha-Mold stands out with professional engineering support, reliable delivery, and global communication standards.
Contact Alpha-Mold
Company: Alpha-Mold Co., Ltd.
Phone: +86 15817600962
Email: info@alpha-mold.com
Services: Custom mold design, precision CNC machining, plastic injection molding, rapid tooling
Hot Keywords: custom mold making, plastic injection mold manufacturer, plastic molding service China, precision mold tooling, custom plastic mold supplier
