Introduction
ZHOUSHAN SHENGLONG MACHINERY CO., LTD. is a Chinese plastics machinery manufacturer based in Zhoushan, Zhejiang, specializing in screws, barrels, extruders, injection-molding components, and twin-screw related parts for plastics processing equipment. The company is presented in trade and exhibition materials as a supplier serving international customers, with an export-oriented profile and a product range centered on wear-intensive core components used in plastic extrusion, injection molding, and compounding systems.
The company is associated with the broader Zhoushan cluster of plastics machinery producers, an industrial base known for specialized production of plasticizing components such as screw barrels and related precision parts. Its public materials emphasize OEM/ODM service, custom development, in-house machining, testing capability, and export sales to overseas markets, indicating a business model focused on both standard catalog products and customer-specific manufacturing.
History and Development
The company has been active in trade directories and plastics exhibition listings for many years, including appearance in Chinese and international plastics trade records from the early 2010s onward. Its continued presence in later exhibition materials, including CHINAPLAS-related listings, suggests sustained participation in the plastics processing equipment supply chain.
A trademark record for “胜龙” identifies the company as the applicant and dates the filing to 2004, indicating an established commercial identity in the plastics machinery market. Public company descriptions also emphasize the development of custom manufacturing capability, precision machining, and quality control systems as part of its evolution from a component supplier to a broader solutions-oriented manufacturer.
Key development themes reflected in available materials include:
- Expansion from basic screw and barrel production toward a wider portfolio of extruder and injection-related components.
- Adoption of OEM/ODM and drawing-based customization services for customer-specific orders.
- Growth in export activity and international market participation, particularly through plastics industry exhibitions and overseas customer relationships.
Business Operations and Segments
Shenglong’s business is centered on the manufacture and sale of plastic machinery parts rather than complete processing lines. Its described operating scope includes:
- Screws and barrels
- Extruder parts
- Injection-molding components
- Twin-screw extruder related parts
- Gearbox bearings and supporting hardware for extrusion equipment.
The company’s operations are described as combining internal machining, quality inspection, and product development, with a stated annual capacity exceeding 20,000 tonnes in one corporate profile and with its own processing plant supporting direct pricing and production control. Public materials also indicate that it uses a mix of manufacturing processes to serve different wear and performance requirements, including special surface treatments and materials engineering for high-demand parts.
Products and Technologies
The company’s core products are screw and barrel assemblies and related wear parts used in plastics processing machinery. These components are critical to plasticizing polymers by conveying, melting, mixing, and pressurizing material before shaping in extrusion or injection systems.
Reported product and process characteristics include:
- Manufacture from 38CrMoAlA carbon steel, a commonly used alloy for screw and barrel applications requiring strength and surface hardening.
- Heat treatment, nitriding, precision grinding, spray-welded wear-resistant layers, polishing, and finishing processes used to improve wear resistance and dimensional accuracy.
- Multiple surface and material treatment options, including cold/hot alloy combinations, advanced nitriding, and thermal spray hardfacing.
- Custom development based on customer drawings or samples, consistent with an OEM/ODM model.
Reported product categories and examples include:
- Extruder screws
- Injection screws
- Twin-screw extruder components
- Barrels and screw barrels
- Expansion screws
- Gearboxes and bearing-related parts for twin-screw systems.
These product types are directly relevant to plastics processors because screw geometry, metallurgy, and barrel treatment affect plasticizing efficiency, output stability, wear life, and material compatibility. Shenglong’s emphasis on precision manufacturing and inspection reflects the technical demands of these components.
Applications and End Markets
The company’s products are used in machinery serving multiple plastics-processing sectors, particularly:
- Extrusion
- Injection molding
- Twin-screw compounding
- General polymer processing equipment.
Its customer base is described as including both domestic and overseas users, with export markets mentioned across Europe, South America, the United States, Japan, and other regions in company and trade materials. This indicates participation in international aftermarkets and OEM supply chains for plastics machinery builders and processors.
Because screws and barrels are wear parts, the company’s end markets likely include processors seeking replacement components, machinery builders seeking OEM supply, and firms requiring customized parts for resin-specific or output-specific applications; this follows directly from its stated OEM/ODM and drawing-based production model.
Global Presence and Market Position
Public materials portray Shenglong as an export-oriented manufacturer with customers in more than 80 countries according to its own promotional material, though this is a company-supplied statement rather than an independently audited figure. Another corporate profile states that the company exports to Europe, Japan, and other international markets, reinforcing its cross-border market reach.
Its market position appears to be that of a specialized component supplier within the plastics machinery ecosystem rather than a full-line machinery conglomerate. In industry terms, such firms play a crucial role in the maintenance, customization, and performance optimization of extrusion and injection systems, where screw and barrel quality can materially influence production efficiency and product consistency.
The company’s presence at CHINAPLAS and related exhibition listings indicates active participation in one of the plastics industry’s major trade platforms. This visibility is consistent with a supplier competing on customization, metallurgy, wear performance, and lead-time responsiveness rather than on broad machinery portfolio breadth.
Research and Development
Shenglong’s corporate descriptions emphasize a professional technical team and ongoing refinement of production processes. The company states that it can develop products from customer drawings or samples and that it has invested in automated production and advanced testing equipment to improve consistency.
Reported R&D and technical capabilities include:
- Product development for customized screw and barrel designs.
- Use of advanced inspection equipment and laboratory testing to verify quality.
- Process improvement and in-house equipment development to support lean production.
The company’s R&D orientation appears closely tied to practical manufacturing needs in the plastics machinery sector, especially the need to balance wear resistance, heat treatment uniformity, machining precision, and process repeatability in components subject to high mechanical and thermal stress.
Sustainability and Environmental Initiatives
The available materials focus primarily on production efficiency and product quality rather than formal sustainability reporting. The most relevant environmental implication of the company’s product line is indirect: well-engineered screws and barrels can improve process efficiency, reduce downtime, and extend component service life, which can lower material waste and replacement frequency in plastics processing operations.
Company materials also mention lean production, JIT-style manufacturing, and quality control systems aimed at reducing cycle time and improving resource use. These operational practices may support efficiency, although the sources do not present a dedicated environmental management report or quantified emissions data.
Quality Management and Certifications
The company states that it operates under ISO 9001-based quality control requirements and references ISO/TS 16949:2002 quality management practices in its corporate profile. It also describes an internal testing laboratory, advanced inspection equipment, and control personnel involved directly in production oversight.
The company’s CHINAPLAS listing identifies it as a “专精特新企业”—a Chinese government-recognized designation for specialized, sophisticated, distinctive, and innovative small and medium-sized enterprises. This designation is relevant because it indicates official recognition of technical specialization and manufacturing capability.
Innovations and Future Outlook
Shenglong’s future prospects are tied to several structural trends in the plastics machinery supply chain:
- Continued demand for replacement and upgraded screw-barrel systems as processors seek longer service life and better output stability.
- Growth in customized and resin-specific components, especially for high-performance polymers, recycled materials, and compounding applications.
- Ongoing preference among machinery builders for suppliers that can provide precision machining, nitriding, hardfacing, and rapid OEM support.
The company’s emphasis on customized production, international sales, and technical inspection suggests a strategy built around specialization and manufacturability rather than mass-market standardization. In the Zhoushan plastics machinery cluster, that positioning aligns with the industry’s need for dependable component suppliers able to support both domestic equipment makers and export-oriented machine builders.
References
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CPS+ eMarketplace. (n.d.). ZHOUSHAN SHENGLONG MACHINERY CO., LTD.ZHOUSHAN SHENGLONG MACHINERY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1003225Link