Introduction
Zhoushan Dinghai Jinsheng Bimetallic Plastic Machinery Factory (舟山市定海区金盛双金属塑料机械制造厂(普通合伙)) is a Chinese manufacturer of screws, barrels, and related components for plastic-processing machinery, based in Zhoushan, Zhejiang Province. Established in 2004, the company is identified as a manufacturer with around 50 employees in third-party supplier listings, and its product scope centers on bimetallic screw-and-barrel assemblies alongside conical twin-screw, parallel twin-screw, single-screw, rubber-processing, and planetary screw-and-barrel configurations used in extrusion and injection molding equipment.
The company operates within the concentrated Zhoushan screw-and-barrel manufacturing cluster, a regional industrial base known for supplying machinery components to plastics processors in China and export markets. Its positioning reflects the broader industry demand for wear-resistant, high-performance processing components that can be customized for applications such as PVC processing, compounding, rubber machinery, extruders, and injection molding machines.
History and Development
Founded in 2004, Jinsheng developed as a specialized producer of screw-and-barrel products rather than a general-purpose plastics machinery maker. Its stated evolution has been toward a broader product range covering multiple screw geometries and material systems, including bimetallic, conical twin-screw, parallel twin-screw, and planetary designs.
Publicly available business records identify the enterprise as a private partnership with registered capital of RMB 800,000, headquartered in the Da Feng / Xihou Industrial area of Jintang Town, Dinghai District, Zhoushan. Trade and exhibition records also show that the company has participated in major plastics industry fairs, including CHINAPLAS, indicating continued commercial activity and market-facing distribution beyond its domestic base.
Business Operations
The company’s core business is the manufacture and supply of screw-and-barrel assemblies for plastic and rubber processing machinery. Available supplier profiles describe it as a manufacturer rather than a trading-only company, and indicate activity in both domestic and export-oriented channels.
Its operational profile is consistent with a specialized component supplier in the plastics machinery value chain:
- Primary output: screw and barrel sets for extruders and injection machines.
- Materials used: #45 steel, 40Cr, 38CrMoAlA, 42CrMo, SKD11, SKD61, and high-temperature alloys.
- Typical customer segments: plastics processors, PVC-related manufacturers, and buyers of replacement or custom machinery parts.
- Workforce scale: about 50 employees in supplier listings.
Products and Technologies
Jinsheng’s product mix is centered on processing-critical components rather than complete machine systems. The company’s listed product families include:
- Bimetallic screw and barrel
- Conical twin screw and barrel
- Parallel twin screw and barrel
- Single screw and barrel
- Rubber screw and barrel
- Planetary screw and barrel
- Injection-molding and extruder components
Technically, these products are important because screws and barrels determine plasticization, mixing, conveying, melting, and wear resistance in processing equipment. Bimetallic barrels are generally used where abrasion, corrosion, or high-output processing conditions increase wear, while twin-screw designs are commonly associated with compounding, PVC processing, and specialized extrusion tasks.
The company’s material list suggests it serves applications requiring different combinations of hardness, heat resistance, and wear performance. That breadth is typical of suppliers that support processors needing custom geometry and metallurgy for specific polymer formulations and machine conditions.
Applications and End Markets
Jinsheng appears to serve the following end markets:
- Plastics extrusion
- Injection molding
- PVC processing
- Rubber machinery
- Polymer compounding and related processing lines
These end markets are consistent with its product portfolio and with the broader demand pattern in China’s plastics machinery supply chain, where screws and barrels are often replaced or upgraded to improve throughput, durability, and processing stability.
Global Presence and Market Position
The company is based in Zhoushan, a well-known industrial region for screw-and-barrel production, which gives it access to a dense ecosystem of machining, heat treatment, and component suppliers. Public listings indicate that the factory has engaged with international business-to-business marketplaces and exhibition platforms, suggesting outreach to buyers beyond its immediate domestic region.
Its market position is best characterized as that of a specialized mid-scale component manufacturer within a regional cluster, rather than a large integrated plastics machinery producer. Industry directories and exhibition listings place it among the many Zhoushan-area firms competing in the screw-and-barrel segment, where differentiation depends on material quality, customization, delivery time, and consistency in wear performance.
Sustainability and Environmental Considerations
No detailed public sustainability report was identified in the available sources. As a supplier of metal processing components, the company’s environmental footprint is more likely to arise from metalworking, heat treatment, machining energy use, and industrial emissions control than from polymer conversion itself.
At the industry level, screw-and-barrel suppliers contribute indirectly to sustainability by enabling more efficient polymer processing, potentially reducing scrap, energy consumption, and downtime when parts are engineered for longer service life and better wear resistance. However, the environmental implications of plastics machinery also remain tied to broader sector challenges surrounding resource use, recycling, and process efficiency.
Leadership and Corporate Information
Public business records identify the enterprise as a private partnership with the legal representative Jin Chunbo and a founding date of 5 January 2004. The company’s registered address is in Jintang Town, Dinghai District, Zhoushan, aligning it with the region’s manufacturing concentration.
Industry Context
The company operates in a niche that is essential to the plastics industry but often less visible than resin production or complete machine assembly. Screw-and-barrel systems are core consumable and replacement components in extrusion and injection molding, and their metallurgy and geometry strongly influence processing quality, wear life, and operating cost.
In that context, Jinsheng’s significance lies in its role as a specialized component supplier within one of China’s most concentrated plastics machinery clusters, serving processors that require custom or replacement parts for demanding applications.
Future Outlook
The company’s future prospects are tied to several broader industry trends:
- Continued demand for wear-resistant and corrosion-resistant processing components
- Ongoing replacement demand from installed extrusion and injection machinery
- Greater need for customization in compounding, PVC, and rubber applications
- Pressure to improve precision manufacturing and consistency in export-oriented supply chains
As plastics processors seek higher uptime and more stable melt processing, suppliers such as Jinsheng remain relevant where metallurgy, dimensional accuracy, and application-specific design are critical.
References
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CPS+ eMarketplace. (n.d.). ZHOUSHAN DINGHAI JINSHENG BIMETALLIC PLASTIC MACHINERY FACTORYZHOUSHAN DINGHAI JINSHENG BIMETALLIC PLASTIC MACHINERY FACTORY. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1005501Link