Finding the best injection molding companies in China is not just a matter of comparing molding prices. For OEM projects, buyers also need to consider tooling control, DFM support, production capacity, quality management, and whether finishing and assembly can be handled without involving several outside suppliers.
At HingTung, we manage these stages as part of one coordinated manufacturing workflow, so we see how much they can influence cost, quality, and production efficiency. The eight injection molding companies below represent different manufacturing models, from large-scale molding groups to rapid manufacturing specialists and integrated OEM factories.
How to Evaluate Injection Molding Companies in China
When comparing plastic injection molding manufacturers, focus on capabilities that directly affect tooling, production stability, and final part quality. Company size matters less than whether the supplier’s resources match the actual OEM project.
Key factors include:
- Tooling capability: In-house mold design and manufacturing provide better control over tooling changes, maintenance, and production consistency.
- DFM and engineering support: Early design review helps identify molding risks before mold construction begins.
- Production capacity: Press range, equipment availability, and manufacturing setup should match the expected part size and production volume.
- Quality systems: Inspection procedures, traceability, and relevant certifications should be clearly documented.
- Secondary operations: Finishing, machining, joining, and assembly can reduce the need to manage multiple suppliers.
- Long-term project fit: Mold ownership, maintenance, engineering changes, and repeat production should be clearly managed from the start.
Best Injection Molding Companies in China at a Glance
The table is intended as a quick shortlist rather than a ranking by company size. A large manufacturer may suit a high-volume program, while another supplier may be a better fit for fast tooling, engineering support, or assembled OEM products.
| Company | Manufacturing Model | Key Strength | Best For |
| HingTung | Integrated OEM factory | Tooling through assembly | End-to-end OEM manufacturing |
| TK Group | Large integrated manufacturer | Tooling and mass production | Large OEM programs |
| RapidDirect | Factory + supplier network | Digital and rapid manufacturing | Fast product development |
| First Mold | Direct manufacturing group | Tooling + molding | Custom tooling and production |
| HLH Rapid | Rapid manufacturing company | Rapid tooling | Prototype and bridge production |
| RPWORLD | Engineering-led manufacturer | DFM and material support | Engineering-focused custom parts |
| JMT Mould | Mold-focused manufacturer | Tool design and construction | Tooling-intensive projects |
| Sositar Mould | Custom mold and molding factory | In-house mold and molding | Small to mid-sized custom programs |
8 Best Injection Molding Companies in China
1. HingTung: Integrated OEM manufacturing
Founded in 2011, HingTung integrates DFM and Moldflow analysis, in-house mold making, custom plastic injection molding services, secondary operations, assembly, and inspection. More than 80 injection molding machines from 60–650T support both tooling development and repeat OEM production.
- Facility: 50,000 m²
- Equipment: 350+ machines and supporting equipment
- Injection molding: 80+ machines, 60–650T
- Certifications: ISO 9001, ISO 14001, IATF 16949
- Key capabilities: DFM, mold making, molding, CNC, finishing, assembly, inspection
2. TK Group: Large-scale integrated manufacturing
Founded in 1983, TK Group provides structural analysis, mold development, validation, mass-production injection molding, and surface treatment. Its four production bases have approximately 180,000 m² of total building area.
- Production bases: Shenzhen, Huizhou, Suzhou, and Vietnam
- Established: 1983
- Public listing: Hong Kong Stock Exchange, stock code 02283
- Key capabilities: Mold development, injection molding, validation, surface treatment
3. RapidDirect: Digital rapid manufacturing
RapidDirect combines China-based facilities with a broader manufacturing network. Its injection molding services include aluminum and steel tooling, Moldflow analysis, insert molding, and overmolding, supported by 50 machines ranging from 90 to 830 tons.
- Manufacturing model: China facilities + supplier network
- Injection molding capacity: 50 machines, 90–830T
- Mold types: Aluminum and steel
- Key capabilities: Digital quoting, rapid tooling, insert molding, overmolding
4. First Mold: Tooling-to-production integration
Founded in 2011 and headquartered in Zhongshan, First Mold combines DFM, in-house tooling, injection molding, CNC machining, QA, and assembly. It operates two production facilities in China and a manufacturing base in Mexico.
- Headquarters: Zhongshan, Guangdong, China
- China facility area: 30,000+ m²
- Overseas manufacturing: Mexico
- Certification: ISO 9001
- Key capabilities: DFM, tooling, injection molding, CNC, QA, assembly
5. HLH Rapid: Rapid tooling and bridge production
Founded in 2008, HLH focuses on prototyping, rapid tooling, and production. Its injection molding capabilities include aluminum and steel tooling, multi-cavity molds, insert molding, and overmolding, with machines ranging from 50 to 3,000 tons.
- Headquarters: Shenzhen, China
- Manufacturing facility: 12,000 m²
- Machine range: 50–3,000T
- Certifications: ISO 9001:2015, ISO 14001:2015, IATF 16949, ISO/IEC 27001
- Key capabilities: Rapid tooling, injection molding, prototyping, finishing
6. RPWORLD: Engineering and material support
RPWORLD focuses on engineering-led custom manufacturing, supporting 100+ material options including engineering plastics and reinforced grades. Its published injection molding capacity reaches 480T, with FAI and RoHS/REACH documentation available where applicable.
- Injection molding capacity: Up to 480T
- Material options: 100+
- Production range: Published guidance covers 50 to 100,000+ parts depending on project requirements
- Quality support: FAI, RoHS/REACH documentation where applicable
- Key capabilities: DFM, material support, custom molding, engineering
7. JMT Mould: High-capacity mold manufacturing
Based in Huangyan, Taizhou, JMT Mould focuses on mold design and manufacturing for automotive, home appliance, and household-product applications. Its two plants cover approximately 41,000 m², with five-axis machining, CNC, EDM, metrology, and injection molding equipment.
- Location: Huangyan, Taizhou, Zhejiang, China
- Facilities: Two plants, approximately 41,000 m²
- Employees: 350+ according to its current company profile
- Certifications: IATF 16949:2016, ISO 9001:2015, environmental and occupational health management systems
- Key capabilities: Mold design, CAE, machining, tooling, injection molding
8. Sositar Mould: Direct mold and molding supply
Sositar Mould is a Shenzhen-based mold-making and injection molding supplier offering DFM, Moldflow analysis, mold design, tooling, inspection, and plastic injection molding.
- Location: Shenzhen, Guangdong, China
- Injection molding: 20 machines
- Machine range: 50–650T
- Key capabilities: Mold design, DFM, tooling, injection molding, inspection
Final Thoughts
The best injection molding company depends on your tooling, material, volume, quality, and downstream manufacturing requirements. For OEM projects requiring integrated support, HingTung provides a single manufacturing workflow from DFM and mold making through molding, secondary processing, and assembly.
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