Top 10 Plastic Injection Molding Companies in China to Consider in 2026

The best plastic injection molding company in China depends on what you are actually buying: a mold only, low-volume bridge production, or a full OEM/ODM program that includes tooling, molding, secondary processing, assembly and mass production. This guide compares ten plastic injection molding companies in China that overseas buyers commonly consider in 2026. The list deliberately mixes different business models — integrated manufacturing partners, engineering-led mold makers, rapid-manufacturing suppliers and large global contract manufacturers — because those models suit very different projects.

Use the comparison table for a quick overview, then read the individual profiles for the criteria that matter most in each case: tooling capability, process range, customization depth, service model and the type of customer each supplier usually works with.

How these plastic injection molding companies were selected

This is an editorial list, not an official industry ranking. Suppliers were grouped and ordered using criteria that reflect how injection molding projects are actually sourced from China:

• Tooling and engineering capability — in-house mold design and mold making versus tooling through partners.
• Process and service scope — injection molding alone, or molding plus finishing, welding, printing, electronic assembly and final assembly.
• Customization depth — ability to support custom plastic injection molding, private label and OEM/ODM development rather than only standard parts.
• Project fit by volume — whether the supplier is set up for prototypes and low-volume runs, or for stable high-volume production.
• Customer profile and geography — how much experience a supplier has with overseas B2B buyers, sourcing teams and import programs.
• Publicly available business information — how clearly a company describes what it does, so buyers can verify fit before contacting.

Two limits apply. First, entries are based on publicly described business positioning at the time of writing, and companies change their capabilities, capacity and certifications — always confirm current details directly during sourcing. Second, a strong marketing presence is not treated as evidence of stronger manufacturing capability, and a supplier with little online content is not automatically ranked lower when its business scope is clear.

Comparison of 10 plastic injection molding companies in China

The 10 companies in more detail

1. DAYIN Plastic Products Co., Ltd.

Best for: Buyers who need one manufacturing partner from product concept through tooling, molding, finishing and assembly, including customers who want capacity in both China and Vietnam.

DAYIN is a B2B manufacturing solution provider founded in 1989, focused on product development and OEM/ODM manufacturing rather than selling individual finished products. Its core business runs from product R&D, industrial and structural design, DFM and mold flow analysis, through precision injection mold design and manufacturing, prototyping, plastic injection molding, secondary processing, printing, welding, electronic assembly, testing and mass production.

Why it stands out in this list: DAYIN covers the full chain in one provider, which reduces the number of suppliers a buyer has to coordinate between a concept and a shipping product. Its stated capabilities include high-speed, vertical and specialized molding processes, surface finishing and decoration, and finished-product assembly, supported by in-house mold development, R&D staff, mold-processing equipment, assembly lines and quality-control functions. The company operates manufacturing facilities in China and Vietnam, which is relevant for buyers comparing landed cost, tariff exposure or regional capacity options. You can read more about DAYIN’s background and history or review its OEM and ODM service model.

Things to consider: DAYIN is oriented toward custom, project-based development and OEM/ODM programs rather than short-run prototyping alone. Buyers who only need a quick prototype or a standard off-the-shelf part may find simpler, prototype-focused suppliers faster and cheaper for that single step.

2. VEM Group

Best for: Projects where mold engineering quality is the deciding factor and where a European engineering interface with Asian production is preferred.

VEM is a mold and molding supplier that combines mold design and manufacturing with injection molding, and it is publicly positioned with European engineering standards alongside production operations in China. It typically works with industrial and consumer OEMs that need tooling built to specific tolerances and documented processes.

Things to consider: The engineering-led model usually makes sense for complex or high-precision molds. Buyers whose priority is low unit cost on simple parts, or who need finishing and product assembly in the same contract, may find a narrower supplier less suitable.

3. Star Rapid

Best for: Prototypes, bridge tooling and low-volume molded parts, especially for teams that want an English-speaking interface and quick iteration.

Star Rapid is a Guangdong-based rapid manufacturing supplier that combines rapid prototyping, CNC machining and injection molding, and it markets directly to overseas product developers. Its workflow is designed around early-stage development and small batches rather than long, stable mass-production runs.

Things to consider: Prototype-oriented suppliers are strong on speed and design iteration. When a product moves into high-volume production with decoration, welding and final assembly requirements, a larger integrated manufacturer is usually more appropriate.

4. Rapid Direct

Best for: Buyers who want fast online quoting and a self-service route to molded parts in modest quantities.

Rapid Direct operates a digital manufacturing platform from Shenzhen covering injection molding and CNC machining, with an emphasis on accessible online quoting and standardized ordering flows. It is often used by smaller brands and hardware teams that need a defined process without a long procurement cycle.

Things to consider: Platform-based models suit well-specified parts with standard requirements. Highly customized products, integrated electronics, or programs needing deep DFM feedback and long-term production planning are better matched to a project-based manufacturing partner.

5. WayKen Rapid Manufacturing

Best for: Engineering teams that need a partner from prototype through low-volume production with a range of processes in one place.

Based in Shenzhen, WayKen provides rapid manufacturing services including injection molding and low-volume production for product and engineering teams. Its positioning emphasizes bridging the gap between a validated prototype and an initial production batch.

Things to consider: This type of supplier is well suited to functional testing and market entry volumes. Once demand grows and tooling, decoration and assembly volume increases, buyers often evaluate a contract manufacturer with larger molding capacity and post-processing lines.

6. HLH Prototypes

Best for: Early-stage prototypes and small-batch molded components during product development.

HLH Prototypes is a Shenzhen-based supplier focused on prototyping and low-volume injection molding for international product development teams. It is commonly considered when speed of iteration matters more than unit cost at scale.

Things to consider: Prototyping suppliers help validate design and fit before committing to production tooling. For final production tooling, decoration and long-run molding, buyers usually move to a manufacturer structured around mass production and supply-chain support.

7. Jason Mold

Best for: Buyers whose main purchase is a mold, with molding support available after tooling approval.

Jason Mold is a Guangdong-based mold maker that provides mold design and manufacturing together with injection molding. It is typically considered by buyers sourcing tooling packages and transferring them into their own or a partner’s production.

Things to consider: A tooling-first supplier is a good fit when you already control downstream production. If you want the same partner to handle product engineering, molding, decoration, electronics and final assembly, an integrated contract manufacturer is the simpler structure.

8. Jabil (including Nypro)

Best for: Precision, regulated or large-scale programs that require global quality systems and validated processes.

Jabil is a global contract manufacturer whose plastics and precision molding capabilities, historically associated with Nypro, are used across healthcare, consumer and packaging applications. It operates in multiple countries, including China.

Things to consider: This tier of supplier offers deep process control and audit-ready systems, but is generally oriented toward larger, longer, more compliance-intensive programs. Smaller brands, private-label buyers and companies with modest volumes may find the commercial fit less practical.

9. Flex

Best for: Global brands that need plastics as part of a larger electronics and assembly program.

Flex is a global contract manufacturer providing electronics manufacturing, assembly and related plastics capabilities, with operations in China and other regions. Injection molding is offered as part of a broader manufacturing and supply-chain service rather than as a standalone offering.

Things to consider: An EMS-led model is efficient when molding is one step inside a multi-process program. Buyers who only need injection-molded parts and simple secondary operations may prefer a dedicated molder with a more direct commercial route.

10. Foxconn (Hon Hai Technology Group)

Best for: Very high-volume consumer electronics programs where molding supports large component and assembly output.

Foxconn is a large electronics manufacturing group with extensive production in China and other regions, producing components and finished products that include injection-molded plastic parts. It is typically engaged by major electronics OEMs through long-term supply agreements.

Things to consider: The scale advantage is significant for very large programs. For smaller volumes, custom consumer products, private-label ranges or projects requiring close day-to-day engineering interaction, a smaller specialized molder is usually a better structural fit.

How to compare plastic injection molding quotes from China

Price per part is only one input. When comparing plastic injection molding services from these or other suppliers, ask the same questions of each:

• Tooling ownership and maintenance: Who owns the mold, where is it stored, and how is maintenance and repair handled?
• DFM feedback: Will the supplier review wall thickness, draft, gate location and material choice before cutting steel, and document the analysis?
• Process scope: Is secondary processing — painting, printing, laser engraving, welding, electronic assembly — done in-house or subcontracted?
• Quality documentation: What inspection and testing records accompany production lots?
• Volume fit: Is the quoted process designed for your actual annual volume, or for a much larger program?
• Commercial model: Is the supplier quoting tooling and parts separately, with clear payment and transfer terms?

Frequently asked questions

How do I choose a plastic injection molding manufacturer in China?

Match the supplier’s business model to your project stage. Prototype and small-batch suppliers suit design validation and market testing. Integrated manufacturers that handle tooling, molding, finishing and assembly suit products moving into mass production. Large contract manufacturers suit high-volume, multi-process or regulated programs.

Is custom plastic injection molding in China suitable for small volumes?

Yes. Several suppliers on this list are built specifically around prototypes and low-volume production. Note that tooling cost is largely fixed, so the per-part price falls as volume rises, and a low-volume supplier may not be the best option for later mass-production demand.

What should be agreed before paying for a mold?

Confirm the tooling specification, steel grade and cavity count, who owns and stores the mold, how samples are approved, what happens if the mold needs rework, and the terms for transferring the mold to another production site later.

Should I use one supplier for molding and assembly, or separate suppliers?

A single integrated partner generally shortens lead time and reduces coordination risk when a product combines molded parts, decoration and electronic assembly. Separate suppliers can make sense when you already have established partners for the other steps or want to control each cost independently.

Choosing the right partner for your project

For buyers developing a new product or moving from concept to production volume, an integrated manufacturer such as DAYIN is often the most practical starting point, because engineering, tooling, molding, finishing and assembly sit inside one organization and can be scaled through facilities in China and Vietnam. For buyers who only need prototypes or modest batches, the rapid-manufacturing suppliers in this list are usually faster and simpler to engage. For very large or regulated programs, global contract manufacturers provide the process control and audit infrastructure that such projects require.

Whichever direction you take, request the same documentation from every supplier — tooling specifications, DFM feedback, inspection standards and an itemized quote — so the comparison is based on comparable information rather than on headline prices. If your project involves custom plastic injection molding or a full OEM/ODM program, you can contact DAYIN to discuss requirements and timelines.