Chinese injection molding manufacturers can look similar on a quotation sheet, but their actual strengths may be very different. A factory that performs well on a large automotive tool may not suit a cosmetic electronics housing, medical silicone component, or short pilot run.
The better question is not simply who has the most machines. You need to compare DFM support, material experience, mold validation, inspection, secondary operations, and the supplier’s ability to support your expected production model.
How We Selected These Injection Molding Companies
This list is not an absolute ranking based on revenue or factory size. The companies were selected for their published in-house tooling, plastic injection molding, engineering support, material or industry specialization, quality systems, downstream processing, international project support, and suitability for different project types. Equipment manufacturers that mainly sell injection molding machines were excluded. The list includes integrated OEM molders, specialist mold makers, precision manufacturers, and online production platforms.
Top 8 Injection Molding Companies in China
1. TK Group — Best for Complex Molding Programs
- Location:Headquartered in Hong Kong, with production bases in Shenzhen, Huizhou, Suzhou, and Vietnam.
- Main capabilities:Precision tooling, injection production, multi-component molding, product validation, surface treatment, and downstream manufacturing support.
- Typical industries:Automotive, consumer electronics, smart home, medical devices, packaging, and personal-care products.
- Best for:Large, long-term programs involving technically complex molds, multiple product variants, or several connected manufacturing processes.
- Why consider it:Its integrated engineering and production structure suits buyers who need more than a stand-alone export mold.
2. HingTung — Best for Engineering-Led OEM Plastic Parts
- Location:Based in Shenzhen, with manufacturing focused on custom molds and precision plastic components for overseas OEM customers.
- Main capabilities:DFM, mold design and manufacturing, custom plastic injection molding, finishing, ultrasonic welding, assembly, inspection, and packaging.
- Typical industries:Telecommunications, security, automotive, consumer products, furniture, medical, and general industrial equipment.
- Best for:Custom housings, covers, brackets, connectors, enclosures, and assembled structural plastic components.
- Why consider it:The HingTung Injection Molding Manufacturer can manage design review, tooling, production, finishing, and assembly under one coordinated project.
3. Hongrita — Best for Medical and LSR Molding
- Location:Operates from Hong Kong, Shenzhen, Zhongshan, and Malaysia, with manufacturing facilities serving international customers.
- Main capabilities:Precision tooling, LSR molding, multi-component molding, high-cavitation molds, smart manufacturing, secondary processing, and assembly.
- Typical industries:Medical, healthcare, baby care, automotive, industrial products, consumer goods, and rigid packaging.
- Best for:Regulated components, silicone parts, and products combining thermoplastics with LSR or multiple materials.
- Why consider it:Its specialized tooling and process capabilities are relevant when material interaction, precision, and validation require close control.
4. Silver Basis — Best for Large Precision Automotive Tooling
- Location:Headquartered in Shenzhen and positioned around large-scale precision die and mold technology.
- Main capabilities:Large precision tooling, plastic production, automotive modules, metal stamping, die casting, gauges, hot runners, and automation.
- Typical industries:Automotive, telecommunications, smart home, sports products, medical equipment, and industrial manufacturing.
- Best for:Large tools, automotive components, and long-term programs requiring several connected manufacturing processes.
- Why consider it:Its main difference is the combination of large mold engineering with broader automotive and structural manufacturing capabilities.
5. Tontec — Best for Engineering Polymers
- Location:Headquartered in Hong Kong, with manufacturing and development operations across China and several overseas regions.
- Main capabilities:Mold design, injection production, and processing of PPA, PPS, PSU, LCP, PEI, PEEK, and reinforced polymers.
- Typical industries:Aerospace, automotive, medical devices, industrial equipment, office products, power tools, and home appliances.
- Best for:Heat-resistant, chemically resistant, dimensionally stable, or fiber-reinforced engineering plastic components.
- Why consider it:Its published polymer experience provides a more useful starting point for advanced material projects than machine tonnage alone.
6. JMT Automotive Mould — Best for Automotive Injection Molds
- Location:Located in Huangyan, Taizhou, Zhejiang, a major Chinese mold-manufacturing region.
- Main capabilities:Automotive bumper, grille, lamp, instrument-panel, door-panel, HVAC, fender, and bi-injection mold development.
- Typical industries:Automotive, home appliances, household products, and other applications requiring large plastic tools.
- Best for:Large automotive interior, exterior, appearance, and structural molds with complex surfaces.
- Why consider it:Its automotive-tooling focus is useful for large molds, but may be excessive for a low-volume electronic enclosure.
7. SINO Mould — Best for Packaging and Thin-Wall Molding
- Location:Based in Huangyan, Taizhou, Zhejiang, with a strong focus on injection mold engineering.
- Main capabilities:Thin-wall molds, multi-cavity tooling, hot runners, IML systems, high-speed molding solutions, and production support.
- Typical industries:Food packaging, household products, appliances, automotive parts, logistics products, and general containers.
- Best for:High-output cups, lids, containers, and other thin-wall products requiring balanced filling and rapid cycles.
- Why consider it:Its packaging focus matters when the mold, machine, robot, labeling system, and cycle performance must work together.
8. Rilong Precision Mold — Best for Optical and Silicone Components
- Location:Established in Shenzhen, with manufacturing operations in Shenzhen and Heyuan, Guangdong.
- Main capabilities:Precision molds, LSR, 2K molding, overmolding, insert molding, optical design, sensor components, waterproof assembly, and finishing.
- Typical industries:Electronics, optical devices, sensors, security products, industrial products, and consumer equipment.
- Best for:Optical, silicone, waterproof, or multi-material parts that combine molding with functional assembly.
- Why consider it:Its optical, Fresnel, sensor, and IP-level assembly capabilities distinguish it from a general mold shop.
Not All Injection Molding Companies Operate the Same Way
A business may describe itself as a plastic molding company, but that label does not explain who builds the tool, where production occurs, or whether the supplier manages assembly. Before requesting quotes, decide whether you need an export mold, complete molded products, regulated production, packaging-scale output, or a flexible pilot service.
| Supplier Type | Main Strength | Best For | Possible Limitation |
| Full-service OEM molder | DFM, tooling, molding, and assembly | Complete custom plastic products | Detailed files are usually needed for quoting |
| Specialist mold maker | Complex mold engineering | Export molds and large tooling | May not prioritize long-term part production |
| Precision or regulated molder | Material control and validation | Medical, optical, and precision parts | Project entry may require more documentation |
| Packaging specialist | Fast cycles and multi-cavity tooling | Containers and thin-wall products | Often less flexible for low-volume custom parts |
| Manufacturing platform | Fast quoting and flexible sourcing | Prototypes and bridge production | Production may involve several facilities |
In practice, the supplier type should match the responsibility you want it to carry. Buying a mold and buying approved, finished, assembled parts are not the same sourcing task.
How to Compare Injection Molding Quotes from China
Two quotations with similar totals may describe very different tools and production responsibilities. A detailed quote should explain what is included, what remains an assumption, and which costs may appear after the first trial.
Check the Mold Specification
Confirm the steel grade, mold base, cavity count, runner system, gate type, cooling design, expected mold life, and included spare inserts or wear parts. A lower tooling price may reflect softer steel, fewer replaceable components, a simpler cooling layout, or a shorter expected service life.
Before approving tooling, ask the supplier to place these items in the quotation or mold specification. Verbal explanations are difficult to enforce later.
Confirm the Material and Inspection Scope
A resin description such as ABS, PC, or PA is not enough. Your plastic injection molder should identify the exact grade, color, flame rating, filler percentage, and any restriction on recycled material.
The quote should also state whether it includes first-article reporting, dimensional inspection, cosmetic checks, functional testing, and inspection fixtures. Define critical dimensions and the inspection frequency before production begins.
Clarify Mold Ownership and Modification Costs
Confirm who owns the mold after payment, where it will be stored, who performs routine maintenance, and what happens if the project moves to another supplier. The agreement should also address engineering-change costs, mold transfer conditions, storage fees, and disposal after the program ends.
These points can be more important than a small difference in the original mold price.
Conclusion
No manufacturer fits every project. Medical LSR parts, automotive tools, thin-wall packaging, rapid pilot runs, engineering polymers, and OEM structural components require different technical and supply-chain strengths.
For custom housings, covers, brackets, connectors, and assembled plastic parts, HingTung supports DFM review, mold design and manufacturing, molding, secondary finishing, inspection, assembly, and packaging. Send your drawings and project requirements to request an initial manufacturability review.