Introduction
Zhejiang Zhongyang Screw Manufacturing Co., Ltd. (浙江中扬螺杆制造有限公司) is a Chinese manufacturer specializing in screws, barrels, and related assembly parts for plastic and rubber processing machinery. Founded in 2006, the company has developed into a sizeable precision component supplier serving extrusion and injection molding applications, with manufacturing operations centered in Zhoushan, Zhejiang Province.
The company’s position in the plastics industry is defined by its focus on the core wear parts that determine plastification, mixing, conveying, and pressure build-up in processing equipment. Its production base includes a large machine park, CNC finishing capability, nitriding and bimetallic barrel workshops, heat-treatment equipment, and in-house testing laboratories, indicating a vertically organized approach to custom and serial production. Company materials state that its products are used in more than 40 countries, underscoring an export-oriented business model in global plastics processing supply chains.
History and Development
Zhejiang Zhongyang Screw Manufacturing was established in 2006 as a designer, manufacturer, rebuilder, and supplier of screw-and-barrel assemblies for plastics and rubber machinery. Over time, the company expanded from a specialist manufacturer into a broader industrial supplier with OEM and ODM capabilities and technical service support.
Several developments illustrate this trajectory:
- The company built a larger production footprint, with materials describing a factory area of about 50,000 square meters and more than 200 employees.
- It invested in specialized processing capacity, including CNC finishing, computer-controlled nitriding, bimetallic barrel casting, quenching, and automatic PTA welding.
- Chinese government and provincial records identify the company as a high-tech enterprise and a recurring entrant in Zhejiang’s technology-oriented SME programs, indicating sustained recognition of its technical profile.
Business Operations
The company operates primarily as a manufacturer and technical supplier rather than a broad machinery OEM. Its activities include:
- design and manufacture of screw and barrel systems;
- rebuilding and refurbishment of worn components;
- supply of assembly parts for plastic and rubber machines;
- technical consulting, repair, installation, and modification services.
The company’s official materials describe a production organization supported by multiple machining centers and stage-by-stage quality inspection, with ISO 9001 certification cited on company-affiliated pages and marketplace listings. Its Zhoushan location places it within one of China’s important industrial clusters for screw and barrel production and related extrusion-component manufacturing.
Products and Technologies
Zhejiang Zhongyang’s portfolio centers on screws, barrels, and assembly parts used in plastics and rubber processing equipment. Reported product categories include:
- single-screw barrels for extrusion machinery;
- injection-molding screws and barrels;
- conical twin-screw and parallel twin-screw assemblies;
- bimetallic screws and barrels;
- segmented screw and barrel components;
- related parts such as heater, gearbox, and auxiliary assembly items in some company descriptions.
The technical significance of these products lies in their role in feeding, melting, mixing, conveying, and pressurizing polymer or rubber feedstock during processing. Company and marketplace descriptions indicate use of materials such as 38CrMoAl and bimetallic structures, which are commonly selected to improve wear resistance, corrosion resistance, and service life in demanding polymer-processing environments.
Manufacturing capabilities described by the company include:
- CNC machining for finishing and dimensional control;
- nitriding to increase surface hardness and wear resistance;
- bimetallic barrel casting for enhanced abrasion performance;
- heat treatment for mechanical property optimization;
- PTA welding for wear-resistant overlays;
- laboratory testing of raw materials and finished products, including composition and hardness checks.
Applications and End Markets
The company’s products are used mainly in plastic extrusion and injection molding. These end markets cover a broad range of polymer-processing equipment, including systems used for pipes, profiles, sheets, packaging materials, consumer goods, and engineered plastic components.
Company descriptions and marketplace listings also indicate relevance to rubber machinery, reflecting the need for wear-resistant screws and barrels in elastomer processing, where mixing and thermal control are critical. Example application areas mentioned in product descriptions include materials such as PP, PE, PVC, ABS, PS, and HDPE.
Global Presence and Market Position
Zhejiang Zhongyang states that its products and services have been sold in more than 40 countries, while other company materials and business-platform profiles suggest a broader export reach across Europe, South America, Southeast Asia, the Middle East, Oceania, and Africa. The company also presents itself on international trade platforms and at plastics-industry exhibition channels, including its CHINAPLAS exhibitor listing.
Public-facing company statements describe the firm as a specialist in screw-and-barrel manufacturing with a sizable production base and export activity, but independently verifiable market-share data are not provided in the available sources. As a result, its market position is best characterized as that of a specialized mid-sized component manufacturer with international sales rather than a diversified multinational machinery group.
Sustainability and Environmental Considerations
No detailed public sustainability report was identified in the available sources. The company’s environmental relevance is tied mainly to the industrial nature of screw-and-barrel production, which depends on heat treatment, metal processing, coatings, and precision machining.
In the broader plastics industry, products such as high-wear screws and barrels can contribute indirectly to material efficiency by supporting stable processing, reduced downtime, and longer service life of machinery components. That effect is inferential rather than explicitly stated by the company, but it is consistent with the technical function of these parts in extrusion and injection systems.
Financial Performance and Economic Impact
The available sources do not disclose audited revenue, profit, or detailed financial statements. Economic impact is therefore better assessed through operational scale and industrial role: the company maintains a substantial manufacturing base, employs a skilled production workforce, and participates in international trade for a critical machinery sub-sector.
Its contribution to the plastics industry lies in supplying wear parts that are essential to the performance and uptime of processing machinery. In practical terms, this places the company within the upstream service and components layer of the plastics value chain rather than the resin-production or final-products segment.
Leadership and Corporate Profile
Public sources identify the firm as a Zhejiang-based manufacturer operating from No. 37 Xingang Fifth Road, High-tech Industrial Park, Dinghai District, Zhoushan, Zhejiang, China. Company-affiliated profiles also describe a technical sales and global-sales organization supporting export business and customer service.
Official and quasi-official records indicate recognition as a high-tech enterprise and inclusion in Zhejiang technology-enterprise programs, which supports its image as a manufacturing company with a notable engineering orientation.
Innovations and Future Outlook
The company’s reported investments in CNC machining, bimetallic casting, nitriding, and PTA welding suggest a strategy centered on extending component durability and tailoring products to different processing conditions. Its technical service offering—covering design, modification, repair, installation, and after-sales consultation—also indicates a move toward solution-oriented manufacturing rather than commodity-only supply.
Future growth is likely to depend on several industry conditions:
- demand for replacement and upgraded screw-and-barrel systems in aging processing equipment;
- continued growth in extrusion and injection molding capacity in export markets;
- customer demand for longer-life, wear-resistant, and application-specific components;
- competition from other Chinese and international screw-and-barrel manufacturers on cost, lead time, and customization.
Summary
Zhejiang Zhongyang Screw Manufacturing Co., Ltd. is a specialized Zhejiang-based producer of screws, barrels, and related components for plastics and rubber machinery. Built around precision machining, wear-resistant processing, and export sales, the company occupies an important niche in the plastics equipment supply chain, where component quality directly affects processing efficiency, product consistency, and equipment life.
References
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CPS+ eMarketplace. (n.d.). ZHEJIANG ZHONGYANG SCREW MANUFACTURING CO., LTD.ZHEJIANG ZHONGYANG SCREW MANUFACTURING CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1026458Link