Finding an injection molding company in China is easy. Finding one that fits the way your product needs to be made is a different matter.
Some manufacturers are built around large automotive tools. Others specialize in silicone, engineering plastics, packaging, or precision components. For an OEM project, the right choice often depends on what happens before and after molding as much as the molding process itself.
Here is a quick look at eight companies and where each one tends to fit best.
| Company | Main Strength | Best Fit |
| HingTung | Integrated OEM manufacturing | Custom parts requiring tooling, molding, finishing, and assembly |
| TK Group | Complex molding programs | Large, long-term multi-process projects |
| Hongrita | LSR and precision molding | Medical, silicone, and multi-material parts |
| Silver Basis | Large precision tooling | Automotive and structural molding programs |
| Tontec | Engineering polymers | High-performance plastic components |
| JMT Automotive Mould | Automotive tooling | Large automotive interior and exterior molds |
| SINO Mould | Thin-wall molding | Packaging and high-output products |
| Rilong Precision Mold | Optical and silicone molding | Optical, sensor, waterproof, and multi-material parts |
Top 8 Injection Molding Companies in China
1. HingTung: Best for Integrated OEM Plastic Part Production
A lot of OEM projects do not end when the molding machine opens. An enclosure may still need inserts, printing, surface finishing, inspection, matching metal parts, assembly, or packaging. Once those jobs are split between several vendors, even a small design revision can create a surprising amount of back-and-forth.
The HingTung injection molding manufacturer is a good fit when the project involves more than molded components alone.
- Core capabilities: DFM, mold design and manufacturing, injection molding, secondary processing, inspection, assembly, and packaging
- Typical parts: Housings, covers, brackets, connectors, enclosures, and structural plastic components
- Industry experience: Consumer electronics, telecommunications, security, automotive, medical, and industrial products
- Best fit: OEM programs where several manufacturing stages need to work together
The advantage here is less about having a long service list and more about keeping responsibility in one place. If a change to a boss, insert, finish, or mating component affects both the mold and final assembly, the engineering team can deal with the effect across the project rather than passing the issue from one supplier to another.
2. TK Group: Best for Complex Molding Programs
TK Group is headquartered in Hong Kong, with manufacturing operations in China and Vietnam. It is one of the larger players on this list, and its setup is better suited to programs that go beyond a relatively simple mold-and-part order.
- Key strengths: Precision tooling, injection molding, multi-component molding, validation, and surface treatment
- Good fit for: Automotive, consumer electronics, medical devices, and smart-home products
- Project profile: Larger programs with complex molds, multiple variants, or several linked manufacturing processes
For a long-running OEM program with a lot of moving parts, that broader engineering and production structure can be useful.
3. Hongrita: Best for Medical and LSR Molding
Hongrita is worth a closer look when silicone or multi-material molding is part of the project. Its experience covers liquid silicone rubber alongside conventional thermoplastics, which puts it in a different category from a general-purpose injection molding shop.
4. Silver Basis: Best for Large Automotive Tooling
Silver Basis is more closely associated with large molds and automotive manufacturing than with small custom plastic programs. Its capabilities extend beyond injection molding into stamping, die casting, hot runners, gauges, automation, and automotive modules.
Where it fits best:
- Large precision molds
- Automotive structural and appearance parts
- Programs requiring several connected manufacturing processes
That scale can be an advantage on demanding automotive work. On the other hand, a company developing a smaller enclosure or a relatively straightforward OEM plastic part may not need such a large manufacturing setup.
5. Tontec: Best for Engineering Polymers
Not every injection molding project can be handled with ABS, PC, or standard nylon. Once a design calls for higher heat resistance, chemical stability, or reinforced materials, resin experience becomes a much bigger part of the supplier decision.
Tontec has published experience with materials including PPA, PPS, PSU, LCP, PEI, PEEK, and reinforced polymers.
That makes it particularly relevant when the project involves:
- High operating temperatures
- Chemical exposure
- Tight dimensional stability
- Fiber-reinforced plastic parts
For these applications, familiarity with the material can be just as important as mold-making capability.
6. JMT Automotive Mould: Best for Automotive Injection Molds
Located in Huangyan, Taizhou, JMT Automotive Mould has a clear automotive focus. Its portfolio includes tooling for bumpers, grilles, lamps, instrument panels, door panels, HVAC components, fenders, and bi-injection parts.
The company is most relevant to:
- Large automotive interior molds
- Exterior appearance parts
- Complex vehicle tooling programs
That specialization is a strength when the project is genuinely automotive. For a smaller electronics housing or general industrial component, however, the same level of automotive tooling capability may add little practical value.
7. SINO Mould: Best for Thin-Wall and Packaging Projects
Thin-wall packaging is a very different molding challenge from producing an industrial enclosure. Here, a few seconds of cycle time, cavity balance, automation, and labeling efficiency can have a direct effect on the economics of the part.
SINO Mould focuses strongly on this type of work, including:
- Thin-wall and multi-cavity molds
- Hot-runner systems
- IML solutions
- High-speed molding
It is therefore a more natural candidate for cups, lids, containers, and similar high-output products where production speed and cavity performance matter more than flexibility for smaller custom projects.
8. Rilong Precision Mold: Best for Optical and Silicone Components
Rilong Precision Mold is more specialized than a conventional plastic mold shop. Its work includes LSR, 2K molding, overmolding, insert molding, optical parts, sensors, waterproof assembly, and related finishing.
A few areas stand out:
- Optical and sensor components
- Silicone and multi-material parts
- Waterproof or functionally assembled products
That combination is useful when the molded component has to do more than hold its shape. Sealing, optical performance, sensing, or bonding different materials may all need to be considered during tooling and molding.
How to Choose the Right Injection Molding Company
Start with what you expect the supplier to deliver. If the job ends with an export mold, a specialist toolmaker may be exactly what you need. A medical silicone component, high-speed packaging tool, automotive bumper mold, or PEEK part can also justify choosing a manufacturer with a much narrower specialization.
The decision changes when the requirement is a finished OEM component. In that case, look beyond machine tonnage and the initial tooling price. DFM support, mold manufacturing, material control, repeat production, inspection, finishing, inserts, assembly, and engineering changes can all affect the real cost and schedule. A cheap mold is not necessarily a cheap project if three more vendors are needed before the part is ready to ship.
Final Thoughts
There is no useful way to name one injection molding company as the best choice for every project. The manufacturer that makes sense for thin-wall packaging may be the wrong choice for an assembled electronics enclosure, just as a large automotive mold specialist may not be ideal for a smaller OEM program.
For products that need tooling, molding, finishing, inspection, or assembly under one project, HingTung offers a more integrated route from design review to finished production. If you already have 3D files or drawings, sending the material, expected volume, key tolerances, finish, assembly requirements, and target schedule gives the engineering team enough information to review manufacturability and prepare a more useful quotation.
