Introduction
Nanjing Pinyi Screw Co., Ltd. (南京品一螺杆有限公司) is a Chinese plastics-machinery component manufacturer based in Nanjing, Jiangsu Province. Established in 2018, the company specializes in modular screw elements and related core components for twin-screw extrusion equipment, while also providing surveying, design, machining, and replacement-part services for domestic and imported extruder brands.
The company operates within the auxiliary-equipment and component segment of the plastics industry rather than as a polymer producer or complete machinery conglomerate. Its products support compounding, recycling, masterbatch production, filled and reinforced plastics, and other processes in which twin-screw extruders are used to melt, mix, disperse, react, and convey polymer materials. Company information describes a 1,200-square-metre production area, more than 40 processing and testing machines, and a reported production capability of approximately 300 metres of screw components per month.
History and Development
Nanjing Pinyi Screw was established in 2018 by technicians and production personnel with experience in extrusion-equipment manufacturing and component production. Its development has centered on three related capabilities:
- Modular screw-element production: The company developed its business around interchangeable screw components used to configure twin-screw processing sections for different materials and operating conditions.
- Custom component engineering: Its design and machining services allow customers to reproduce, modify, or replace core components for both domestic and imported extruders.
- Expansion from parts toward integrated support: Company descriptions indicate that its activities extend beyond individual screw elements to associated parts and, through its wider business network, complete twin-screw extrusion lines and granulation equipment.
This progression reflects a broader trend in the plastics-machinery sector: processors increasingly seek specialized component suppliers capable of shortening maintenance cycles, adapting equipment to new formulations, and supporting older or imported machinery.
Business Operations and Segments
Nanjing Pinyi Screw’s principal business activities include:
- Manufacture of modular screw elements for twin-screw extruders
- Engineering and machining of shafts, barrels, and other core components
- Replacement and refurbishment support for extrusion machinery
- Design and production of components based on customer drawings, samples, or equipment surveys
- Technical support for domestic and imported extruder configurations
- Associated supply of extrusion machinery and granulation lines through its broader commercial activities
The company’s operating model is therefore primarily business-to-business. Its customers are equipment manufacturers, plastics processors, compounders, recyclers, masterbatch producers, and machinery-service companies requiring replacement parts or customized processing configurations.
Products and Technologies
Modular Screw Elements
Modular screw elements are the company’s central product category. In a segmented twin-screw extruder, individual elements are mounted on keyed shafts to create a processing screw with defined conveying, kneading, mixing, or reverse-conveying functions.
Typical element categories include:
- Conveying elements for polymer transport
- Kneading blocks for distributive and dispersive mixing
- Mixing elements for improving additive or filler dispersion
- Reverse-conveying elements for increasing residence time and melt pressure
- Transition and combination elements for linking different processing zones
- Customized geometries for particular formulations or machine designs
The ability to change element geometry enables processors to adapt an extruder to polymers with different melt viscosities, filler concentrations, moisture levels, or thermal sensitivities. Screw configuration is particularly important in glass-fiber compounds, mineral-filled compounds, recycled polymers, flame-retardant formulations, and masterbatch production.
Shafts, Barrels, and Associated Parts
In addition to screw elements, Nanjing Pinyi Screw states that it can process other extrusion-machine components, including shafts and barrels. These parts must be manufactured to close dimensional tolerances because alignment, concentricity, intermeshing clearance, and surface condition affect throughput, torque transmission, wear, and product quality.
Barrels may incorporate specialized sections for:
- Solids feeding
- Polymer melting
- Filler or fiber side feeding
- Vacuum devolatilization
- Liquid injection
- Reaction or residence-time control
- Pressure buildup and die feeding
The company’s stated capability to survey and process parts for imported extruders is relevant to processors operating equipment from multiple manufacturers, particularly where original replacement components are costly, delayed, or no longer routinely available.
Manufacturing and Testing Capabilities
The company reports more than 40 processing and testing machines within its production facility. The available company information does not identify every machine type, but production of screw elements generally requires a combination of precision machining, heat treatment, grinding, dimensional inspection, and material or hardness verification.
Performance-related considerations for such components include:
- Dimensional accuracy and repeatability
- Resistance to abrasive fillers and glass fibres
- Resistance to corrosion from aggressive additives or polymers
- Surface hardness and wear life
- Proper fit between elements, shafts, and barrel bores
- Compatibility with the extruder’s torque, speed, and temperature range
Applications and End Markets
Nanjing Pinyi Screw serves the plastics-processing ecosystem through components used in applications such as:
- Engineering-plastics compounding
- Recycled-plastics processing
- Masterbatch manufacture
- Filled and reinforced polymer compounds
- Flame-retardant compounds
- Colour concentrates
- Polymer blending and alloying
- Biodegradable and modified polymer formulations
- Granulation and pelletizing operations
Twin-screw extrusion is used across automotive materials, electrical and electronic plastics, consumer products, packaging, construction materials, agriculture, and industrial components. The company’s component-focused position means that it participates indirectly in these end markets by supplying the machinery elements that enable formulation and material conversion.
Global Presence and Market Position
Nanjing Pinyi Screw is located in Nanjing, an important industrial and engineering centre in eastern China with access to machinery manufacturers, polymer processors, transportation infrastructure, and the wider Yangtze River Delta manufacturing base.
The company presents itself as capable of supplying parts for domestic and imported extruders and serving customers outside China. Industry-facing business information also describes supply activity extending across Asian, European, and North American markets, although the available material does not establish a formal geographic revenue breakdown.
Its competitive position is based on specialization rather than scale. Relevant differentiators include:
- Compatibility with multiple extruder brands
- Custom manufacture from samples, drawings, or equipment measurements
- Shorter supply routes for replacement components
- Integration of design and machining capabilities
- Focus on modular screw components rather than only complete extrusion systems
The company operates in a fragmented supplier segment that includes original equipment manufacturers, specialist screw-element producers, machine shops, and aftermarket parts companies. Competition is influenced by material expertise, machining precision, delivery reliability, component life, and the ability to match legacy equipment.
Research and Development
Research and development at Nanjing Pinyi Screw is closely connected with application engineering. The company identifies strong design and research capability as part of its operating profile and states that its design team can survey, design, and process core extruder components for different brands.
For screw-component manufacturers, development work commonly involves:
- Adapting element geometry to improve melting and mixing
- Optimizing conveying and residence-time behaviour
- Developing wear-resistant configurations for abrasive formulations
- Matching parts to different shaft profiles and barrel dimensions
- Designing components for higher recycled-content or filler-loaded materials
- Balancing throughput, torque demand, melt temperature, and material degradation
Such work supports the wider plastics industry’s transition toward more complex formulations, increased recycled content, lightweight engineering materials, and more demanding processing conditions.
Sustainability and Environmental Initiatives
The company’s products can contribute indirectly to resource efficiency by extending the service life of extrusion machinery and enabling processors to maintain or reconfigure existing equipment rather than replace complete systems. Modular components may also allow worn sections to be replaced selectively.
Its equipment-related relevance to sustainability includes:
- Support for plastics recycling and regranulation
- Component supply for recycled-polymer compounding
- Maintenance and refurbishment of existing extrusion assets
- Screw configurations designed for filled, recycled, or bio-based materials
- Potential reduction in downtime and material losses through properly matched replacement parts
These benefits depend on actual operating conditions, component durability, energy consumption, and the efficiency of the complete extrusion line. Component manufacture itself also involves energy-intensive machining and heat-treatment processes, making material selection, manufacturing efficiency, and service life important environmental considerations.
Quality Management and Certifications
The company emphasizes production and testing capability, dimensional processing, and compatibility with multiple extruder designs. These factors are central to quality assurance for twin-screw components because small deviations in geometry or alignment can affect wear, torque, leakage, mixing performance, and product consistency.
Relevant quality controls for this product category include:
- Inspection of dimensions and tolerances
- Verification of shaft and element fit
- Material and hardness testing
- Surface-finish assessment
- Inspection of keyways and mating surfaces
- Functional or assembly checks
- Traceability of customized parts
Specific third-party certifications are not included in the cited company information and therefore are not described here.
Innovations and Future Outlook
Nanjing Pinyi Screw’s future prospects are linked to several structural developments in plastics processing:
- Growth in mechanical recycling and recycled-polymer compounding
- Rising use of glass fibre, mineral, and flame-retardant formulations
- Demand for engineering plastics in mobility, electronics, and energy systems
- Continued maintenance of installed extrusion equipment
- Greater need for customized screw designs for difficult or variable feedstocks
- Expansion of aftermarket services for imported and legacy machinery
The company’s ability to combine design, surveying, machining, and component supply may support customers seeking alternatives to original equipment channels. Its longer-term competitiveness will depend on maintaining dimensional precision, demonstrating component durability, expanding material and geometry expertise, and providing dependable delivery and technical support across international markets.
Summary
Nanjing Pinyi Screw Co., Ltd. is a Nanjing-based plastics-machinery component manufacturer established in 2018. Its core business is the production of modular screw elements and related components for twin-screw extruders, supported by custom design, equipment surveying, machining, and replacement-part services.
The company occupies a specialized position within the plastics industry’s machinery supply chain. Its products support compounding, recycling, masterbatch production, filled polymers, engineering plastics, and other extrusion-intensive applications. With a reported 1,200-square-metre facility, more than 40 processing and testing machines, and stated capacity of approximately 300 metres of screw components per month, Nanjing Pinyi Screw’s development is associated with the growing demand for configurable, maintainable, and application-specific extrusion equipment.
References
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CPS+ eMarketplace. (n.d.). NANJING PINYI SCREW CO., LTD.NANJING PINYI SCREW CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1040134Link