Introduction
ZHOUSHAN JIALONG SCREW MANUFACTURE CO., LTD. is a Chinese manufacturer specializing in screw barrels for the plastics and rubber machinery industry, with product lines that include conical twin-screw, parallel twin-screw, planetary, and single-screw assemblies for extruders and injection moulding machines. Headquartered in Jintang Town, Zhoushan, Zhejiang Province, the company was established in 2008 and serves export markets across Eastern Asia, Southeast Asia, the Middle East, and Africa. In industry terms, it operates in a critical upstream segment of plastics processing equipment, supplying wear-intensive components that strongly influence plastication, mixing, throughput, energy efficiency, and product quality in downstream polymer conversion.
The company is positioned as a manufacturer and seller under the Jialong brand, with an emphasis on customized engineering, surface treatment, and durability-oriented designs such as SKD inlay sleeve solutions for conical twin-screw barrels. Chinaplas exhibitor information identifies the company as a specialized, innovative enterprise recognized by the Chinese government, indicating a formal policy-level designation often associated with technology-oriented small and medium-sized manufacturers.
History and Development
Zhoushan Jialong Screw Manufacture was founded in 2008, building on what company materials describe as roughly two decades of screw-design experience and a manufacturing base in Zhoushan, a well-known Chinese cluster for screw and barrel production. The company presents itself as part of the region’s established machinery supply chain, where precision screw and barrel producers support both domestic and export-oriented plastics processing equipment makers.
A second development milestone was the company’s stated expansion from general screw-barrel manufacturing into a broader portfolio covering extrusion and injection moulding applications, including specialized variants such as bimetallic, rubber extruder, and segment screw and barrel products. This diversification indicates movement beyond standard commodity components toward application-specific engineering.
A third milestone is its participation in trade-show and supplier platforms, including CHINAPLAS exhibitor listings, which place the company within the regional network of plastics machinery suppliers seeking international buyers and OEM relationships. That visibility is consistent with its reported export activity in overseas markets.
Business Operations and Segments
The company’s core business is the manufacture of screw and barrel assemblies used in plastics and rubber processing machinery. Its operations are centered on the design, machining, and surface treatment of wear parts that are installed in processing equipment rather than on the production of full machines.
Its business scope appears to cover:
- Extrusion components for single-screw and twin-screw extruders
- Injection moulding screw barrels
- Rubber-processing screw systems
- Custom engineering and refurbishment-style solutions for customer-specific process requirements
Company materials state that it serves mainly Eastern Asia, Southeast Asia, the Middle East, and Africa, while available shipment data indicates at least some exports to India. Public supplier listings also describe it as active in OEM and processor supply channels.
Products and Technologies
Jialong’s product portfolio centers on screw-barrel systems for different machine architectures and processing tasks. The main categories include:
- Conical twin screw and barrel
- Parallel twin screw and barrel
- Planetary screw and barrel
- Single screw and barrel
- Bimetallic screw and barrel
- Rubber extruder screw
- Segment screw and barrel
- Injection moulding machine screw barrel
Technically, these components are central to polymer melting, conveying, compression, mixing, devolatilization, and pressure generation in plastics processing equipment. The company states that it offers several treatment options, including nitriding, chrome plating, stainless steel, bimetallic, and surface spraying technologies to address different wear, corrosion, and operating-life requirements.
Its materials also highlight use of 38CrMoAlA alloy steel and, for some products, SKD inlay sleeve designs intended to improve service life. For selected conical twin-screw products, public product listings indicate specifications such as nitrided surface hardness, nitriding depth, and documented inspection support, which are relevant indicators of wear resistance and quality control in screw-barrel manufacturing.
In practical terms, the company’s technology focus suggests an emphasis on:
- Wear resistance, especially in abrasive or filled compounds
- Corrosion resistance, important for PVC and other chemically active materials
- Process stability, through precision machining and application-specific geometry
- Customization, to fit different machine platforms and downstream process requirements
Applications and End Markets
The company’s components are used in plastic extrusion and injection moulding, as well as in rubber processing applications. Public listings specifically mention compatibility with materials and applications such as PVC, EVA, TPR, TR, and related plastic-machine configurations.
Its end markets therefore include:
- Plastic pipe, profile, and sheet extrusion
- PVC and engineering-polymer processing
- Injection moulding operations
- Rubber and elastomer conversion
- OEM machine builders and parts replacement channels
Because screws and barrels are high-wear consumables, the company also participates indirectly in the maintenance and replacement market for plastics machinery, where machine uptime and part life are economically significant for processors.
Global Presence and Market Position
Zhoushan Jialong is a mid-sized specialized manufacturer rather than a diversified multinational group. Company materials indicate a workforce of roughly 100 to 120 employees and annual sales in the range of 13 million to 14 million in reported currency terms. Those figures place it among the small-to-medium industrial suppliers that form an important part of China’s plastics machinery supply chain.
Its geographic position in Zhoushan, specifically Jintang Town, is notable because the area is widely associated with screw and barrel manufacturing, giving the company access to an established industrial ecosystem of machining, metallurgy, and logistics. The company also indicates branch or sales presence in several Chinese cities, suggesting a domestic sales-and-service network supporting wider coverage.
Trade-platform data suggests that the company has conducted limited but identifiable export business, including shipments to an Indian buyer in the extruder-spare-parts category. While that data does not establish market share, it does confirm participation in cross-border supply chains.
Sustainability and Environmental Initiatives
Publicly available materials for the company focus more on material performance and service life than on formal sustainability reporting. However, longer-life components can contribute indirectly to resource efficiency by reducing replacement frequency, downtime, and scrap associated with premature wear.
The company’s use of bimetallic and surface-treated solutions is relevant from an environmental and operational perspective because such technologies are often adopted to extend component life under abrasive or corrosive processing conditions. That said, no detailed public sustainability targets, emissions disclosures, or circular-economy programs were identified in the available sources.
Financial Performance and Economic Impact
The company discloses annual sales of approximately 13 million to 14 million and a workforce of around 100 to 120 employees. Those figures suggest a focused industrial supplier with meaningful local employment and steady participation in the machinery-component economy.
Its economic impact lies less in scale than in specialization: screw and barrel producers support the broader plastics-processing sector by enabling machine performance, maintenance cycles, and equipment localization. In that sense, the company contributes to the regional industrial base serving polymer converters, machine builders, and aftermarket customers.
Leadership and Corporate Governance
Publicly available source material identifies the company’s contact person as Wenglei, but no detailed board structure, ownership profile, or formal governance disclosures were located in the reviewed sources. As a privately held manufacturing company, its governance information appears limited in public-facing materials.
Innovations and Future Outlook
The company’s innovation profile is centered on custom engineering, materials selection, and surface-treatment capability rather than on fully novel process machinery. This is consistent with the role of a specialized component supplier, where incremental gains in wear life, machining precision, and fit-for-process design can have substantial operational value for customers.
Its inclusion in CHINAPLAS exhibitor materials as a specialized and innovative enterprise suggests continuing positioning around technical capability and product differentiation. Future competitiveness will likely depend on the company’s ability to:
- Maintain precision and consistency in high-wear components
- Expand value-added materials and surface technologies
- Support custom configurations for diverse polymer applications
- Strengthen export relationships and OEM cooperation
Summary
Zhoushan Jialong Screw Manufacture Co., Ltd. is a specialized Chinese producer of screws and barrels for plastics and rubber processing machinery, founded in 2008 and based in Zhoushan, Zhejiang. Its product scope spans conical and parallel twin screws, single-screw systems, planetary assemblies, and bimetallic and surface-treated variants designed for extrusion and injection moulding applications. Within the plastics industry, it represents an important type of precision component supplier whose technical performance directly affects machine durability, processing stability, and downstream manufacturing efficiency.
References
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CPS+ eMarketplace. (n.d.). ZHOUSHAN JIALONG SCREW MANUFACTURE CO., LTD.ZHOUSHAN JIALONG SCREW MANUFACTURE CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1026637Link