Introduction
ZHOUSHAN JINJIA PLASTICS MACHINERY CO., LTD. (浙江金佳塑料机械有限公司) is a Chinese manufacturer of bimetallic barrels and screws for plastics processing machinery, with its operations centered in Jintang Town, Dinghai District, Zhoushan, Zhejiang Province. The company presents itself as a research, production, and sales enterprise focused on wear-resistant, corrosion-resistant, high-hardness screw-barrel systems, with a particular emphasis on large-diameter products used in demanding processing environments.
In the plastics industry, barrel and screw assemblies are critical wear parts that determine plasticizing efficiency, output stability, and service life in injection molding, extrusion, and related compounding applications. Jinjia positions itself in this niche by manufacturing bimetallic screw barrels for engineering plastics and high-fill or highly abrasive materials such as PVC, PP, PE, XPS, fiberglass-filled plastics, calcium-filled compounds, and flame-retardant materials. The company also highlights export activity and participation in international plastics-industry exhibitions, indicating a market presence that extends beyond China.
History and Development
Zhejiang Jinjia Plastics Machinery Co., Ltd. states that it was established in 2009 and operates from a plant area of more than 14,000 square meters. Its registered capital is reported as RMB 10 million.
A notable development in the company’s technical profile is the claimed patent for a nickel-based cobalt-chromium bimetallic conical twin barrel, which the company describes as supporting its wear-performance specialization. This suggests an early focus on differentiated metallurgy rather than standard commodity parts.
The company later expanded its export orientation, stating that it holds self-operated import and export rights and ships products to markets including Turkey, the European Union, the United States, Brazil, India, South Korea, Iran, Russia, and Southeast Asia. Its repeated inclusion in CHINAPLAS-related exhibitor and technology listings also indicates a sustained effort to market itself within the international plastics equipment ecosystem.
Business Operations
Jinjia describes its operating model as integrating science and technology, production, and sales. Its core business is the manufacture of bimetallic barrel and screw assemblies, especially those intended for high-wear or corrosive processing conditions.
The company’s business profile also indicates activity in plastics machinery and related parts, with some records listing broader manufacturing and processing of plastics machinery and associated components. However, the company’s public-facing materials consistently emphasize screw-barrel systems as the central product line.
Products and Technologies
Jinjia’s main products include:
- Bimetallic barrels
- Bimetallic screws
- Conical twin-screw barrels
- Parallel twin-screw barrels
- Injection molding screw barrels
- Extrusion screw barrels
The company states that it has particular capability in large-size screw barrels, with production described as mature and stable for screw diameters of 500 mm, 600 mm, and 700 mm. That scale is relevant for large extrusion and heavy-duty processing lines, where torque, wear resistance, and thermal stability are especially important.
Technically, Jinjia says it works with cobalt-based tungsten carbide systems and other bimetallic structures designed for high wear resistance, high corrosion resistance, and high hardness. It also highlights processing knowledge for challenging materials such as halogen-free flame-retardant plastics, high-fiberglass plastics, magnetic plastics, high-calcium-powder plastics, bakelite, and XPS foam board materials.
The company lists several manufacturing and inspection capabilities, including:
- High-temperature, high-speed automatic centrifugal bimetal casting furnaces
- CNC screw machine tools
- Large processing centers
- Vacuum heat-treatment equipment
- Cladding processing equipment
- Bimetal alloy HIP composite manufacturing equipment
- Hardness and alloy-layer testing equipment
These technologies are consistent with a supplier of precision wear parts, where metallurgy, bonding quality, and dimensional accuracy directly affect machine performance and part life.
Applications and End Markets
Jinjia’s products are directed primarily at processors using injection molding and extrusion equipment. The company’s own descriptions and third-party listings indicate use in materials and applications such as:
- PVC profiles
- XPS foam boards
- Engineering plastics
- Flame-retardant compounds
- Fiberglass-filled materials
- High-calcium formulations
- Bakelite processing
These end markets are typical of applications where standard screw-barrel assemblies wear quickly and where service life can be improved by bimetallic or other surface-engineered designs.
Global Presence and Market Position
Public company materials describe Jinjia as one of the larger Chinese manufacturers of bimetallic barrels and screws and note a particular advantage in large-size screw barrels. The company also states that it is among the Chinese firms with relatively high export volumes in this product category.
Its reported overseas markets include Europe, North America, South America, the Middle East, South Asia, and Southeast Asia, suggesting a business model oriented toward both domestic and international machinery makers and processors. While publicly available materials do not provide audited market share figures, the company’s repeated exhibition presence and export claims indicate that it participates in the global niche market for high-performance plasticizing components.
Sustainability and Environmental Considerations
No detailed public sustainability report was identified in the provided sources. Based on the company’s product focus, its main environmental relevance lies in the durability and service-life extension of screw-barrel assemblies, which can reduce replacement frequency and material consumption in plastics processing equipment.
At the same time, Jinjia’s product range serves sectors that process PVC, flame-retardant, and filled compounds, which are associated with stricter operational and environmental controls in many jurisdictions. The company’s publicly stated emphasis is therefore best understood as performance and durability rather than explicit sustainability leadership.
Leadership and Corporate Profile
Public records identify Xu Mingliang as the company’s legal representative. The company is located at No. 8 Jixiang Road, Xihou Industrial Zone, Jintang Town, Dinghai District, Zhoushan, Zhejiang, China.
The available sources do not provide a full board structure or governance framework. The firm’s public materials instead emphasize engineering capability, export operations, and technical specialization, which is typical of many privately held industrial component manufacturers in China.
Innovations and Future Outlook
Jinjia’s future development appears tied to demand for high-performance wear parts in plastics processing, especially as processors pursue longer service intervals, greater throughput, and more stable operation with abrasive or corrosive formulations. Its capability in large-diameter screw barrels may be especially relevant for industrial extrusion lines and high-output applications.
The company’s technical differentiation is likely to depend on continued advancement in metallurgical formulations, bonding quality, heat treatment, and precision machining. In a market where many users compare parts by lifespan, hardness, and corrosion resistance, Jinjia’s competitive position will depend on maintaining consistent quality and demonstrating performance under demanding real-world processing conditions.
Summary
ZHOUSHAN JINJIA PLASTICS MACHINERY CO., LTD. is a specialized Chinese manufacturer of bimetallic screw barrels serving the plastics machinery sector. Its public profile centers on large-size, wear-resistant, corrosion-resistant components for injection and extrusion equipment, with documented export activity and a technical focus on difficult processing materials.
References
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CPS+ eMarketplace. (n.d.). ZHOUSHAN JINJIA PLASTICS MACHINERY CO., LTD.ZHOUSHAN JINJIA PLASTICS MACHINERY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1024956Link