Introduction
Ningbo Jinyi Precision Machinery Co., Ltd. (宁波金亿精密机械有限公司) is a Chinese manufacturer of screws, barrels, tie bars, and related precision parts for plastics and rubber processing machinery, with additional supply relationships into food and medical applications. The company is headquartered in Ningbo, Zhejiang, and describes itself as having more than 25 years of development, multiple production bases in Ningbo and Zhoushan, and an in-house manufacturing model that covers key finishing processes for screw-barrel systems.
Within the plastics industry, Jinyi operates in a technically important niche: the manufacture of core wear components used in injection molding, extrusion, and related polymer-processing equipment. Its product range includes single-screw and twin-screw barrel sets, bimetallic and nitrided wear-resistant configurations, and tie bars, pistons, and nuts for machinery platforms used by plastics and rubber processors. The company also emphasizes process control, certification, and customized engineering support, reflecting the importance of dimensional accuracy, surface treatment, and wear resistance in this segment of machinery supply.
History and Development
Jinyi’s corporate materials place its development over more than two decades, with establishment records available from third-party business directories indicating 2003 as the formal founding date, while the company itself presents a longer operating history in the industry. This combination suggests a business that grew from an earlier manufacturing base into a more formalized corporate structure in the early 2000s.
A few development milestones are consistently identifiable:
- The company reports that it was among the first in its industry to implement ISO 9001 and SGS certification, indicating an early emphasis on quality management and external verification.
- It established an in-house chrome-plating workshop in mainland China, which the company says allows more of the screw-barrel and tie-bar production chain to be controlled internally.
- Its production footprint expanded to five factories in Ningbo and Zhoushan, supporting a broader product scope and higher-volume manufacturing capacity.
Publicly available Chinese records also show that the company has been recognized as a technology-oriented small and medium-sized enterprise in Ningbo, and industry databases report a portfolio of patents and technical activity associated with the business.
Business Operations and Segments
Jinyi’s business is centered on precision manufacturing for polymer-processing machinery. Its operations are best understood as serving the equipment layer of the plastics industry rather than raw materials or final plastic products.
Core operating areas
- Injection molding components
- Extrusion components
- Rubber-processing components
- Auxiliary precision parts, including tie bars, pistons, and nuts
The company states that it supplies parts for plastics, rubber, food, and medical industries, and some product listings reference compatibility with major machine types and branded equipment platforms used in injection molding and extrusion. Jinyi also presents itself as a manufacturer and trading company, indicating a model that combines direct factory production with export and commercial functions.
Products and Technologies
Jinyi’s main products are screw-barrel assemblies and related machine elements. These components are central to polymer processing because they meter, plasticize, convey, and pressurize material during molding or extrusion.
Product categories
- Single-screw barrels
- Twin-screw barrels
- Bimetallic screw barrels
- Wear-resistant screw barrels
- Tie bars, piston rods, and nuts
Technical characteristics
The company describes its products as being made through processes such as nitriding, electroplating, and PTA surfacing, with product listings also referring to tungsten carbide coating and other wear-resistant treatments. Chinese-language company materials further describe a range of screw geometries used in processing, including variable pitch and variable depth screws, mixing screws, barrier screws, vented screws, and other specialized profiles designed for different processing conditions.
Jinyi’s materials also indicate that it works with alloys and surface-engineering methods intended to improve service life under abrasive and corrosive wear environments. This is especially relevant in plastics processing, where additives, fillers, PVC compounds, and engineering polymers can significantly increase wear and corrosion demands on machine components.
Manufacturing and process control
According to company materials, Jinyi performs a substantial part of its manufacturing workflow in-house, including finishing and surface-treatment operations. The company also emphasizes precision inspection at each stage of production and states that it has established a quality-control system supporting consistent output.
Applications and End Markets
Jinyi’s components are used in machinery serving several downstream sectors:
- Plastics processing
- Rubber processing
- Food equipment
- Medical equipment
Within plastics, the company’s products are relevant to:
- Injection molding
- Profile and pipe extrusion
- Sheet and board extrusion
- Blowing and related conversion processes
This application profile is consistent with the role of screw-barrel systems as consumable or semi-consumable wear parts in polymer machinery. Because these parts are exposed to heat, pressure, abrasion, and chemical interaction, buyers often prioritize metallurgy, surface hardening, dimensional tolerance, and repairability.
Global Presence and Market Position
Jinyi presents itself as an export-oriented industrial supplier with customers and partners in more than 30 countries, including the United States, Germany, Japan, Spain, Italy, the United Kingdom, Korea, and Canada. Other company-facing materials state that its products are sold to more than 50 countries and regions, indicating a broader claimed international reach in Chinese-language sources. The difference likely reflects varying reporting dates or definitions of active markets.
The company’s location in Ningbo, a major port city, is strategically significant for export logistics. Company materials emphasize proximity to Ningbo Port and efficient shipment capability. In industry directories, Jinyi is also described as participating in international trade platforms and exhibitions, reinforcing its position as a globalized component supplier rather than a purely domestic machine shop.
No reliable source among the provided materials gives a verified global market share, so its market position is best described as a specialized mid-sized industrial supplier with international reach, rather than a quantified market leader.
Sustainability and Environmental Initiatives
Public materials in the provided sources do not present a detailed sustainability report, carbon target, or lifecycle program. What is visible is a manufacturing strategy focused on durability and wear resistance, which can indirectly support resource efficiency by extending component life and reducing replacement frequency.
The company’s focus on repair services, surface treatment, and custom refurbishment of worn screws suggests an emphasis on component life extension rather than single-use replacement. However, no source provided here is sufficient to assess broader environmental performance, energy use, emissions management, or compliance beyond quality certification.
Financial Performance and Economic Impact
No audited financial statements or revenue disclosures were included in the available sources. As a result, Jinyi’s financial performance cannot be quantified here with confidence.
What can be verified is its industrial footprint:
- Multiple manufacturing bases in Ningbo and Zhoushan
- A workforce described in company materials as roughly 300 employees
- A registered capital figure of 30 million RMB in third-party business listings
- Export activity across multiple continents and industrial markets
These indicators suggest a company with meaningful regional manufacturing importance in Zhejiang’s precision machinery sector, particularly in the niche of polymer-processing wear parts.
Leadership and Corporate Governance
Publicly accessible materials identify Zhang Libo as the legal representative in some Chinese business data sources, while third-party records also reference a management structure involving family or closely held ownership. The company is presented as a privately held manufacturing enterprise rather than a listed corporation.
Governance-related signals visible in the sources include:
- Formal business registration and establishment records
- Quality-system certification claims
- Patent and technology activity recorded in commercial databases and news coverage
No source provided here includes a detailed board structure, audited governance report, or ESG governance framework.
Innovations and Future Outlook
Jinyi’s innovation profile is closely tied to materials engineering, surface treatment, and custom process design for screw-barrel systems. Its references to bimetallic structures, wear-resistant coatings, and specialized screw geometries point to ongoing technical work aimed at improving lifespan and process stability in demanding applications.
Recent patent-related reporting indicates continued attention to proprietary machinery and manufacturing methods, including a reported 2025 patent grant for an injection screw processing device. Public patent databases and industry intelligence sources also show a meaningful intellectual-property footprint, although the exact technical scope is broader than the materials reviewed here.
Going forward, Jinyi’s prospects are likely tied to several industry trends:
- Demand for higher-wear, longer-life components in PVC, engineering plastics, and filled compounds
- Greater need for customized screw-barrel designs to match specific resins and process windows
- Continued competition based on precision, turnaround time, and repair capability
- Export opportunities in machinery supply chains serving Asia, Europe, and North America
Summary
Ningbo Jinyi Precision Machinery Co., Ltd. is a specialized Chinese manufacturer focused on the precision components that underpin plastics and rubber processing machinery. Its core strengths lie in screw-barrel manufacturing, surface engineering, and customized wear-resistant parts, supported by multiple production bases, export activity, and a long operating history in Ningbo’s industrial ecosystem.
References
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CPS+ eMarketplace. (n.d.). NINGBO JINYI PRECISION MACHINERY CO., LTD.NINGBO JINYI PRECISION MACHINERY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1006610Link