Introduction
ZHOUSHAN JINTANG OULIN MACHINERY CO., LTD. (舟山市金塘欧林机械有限公司), also known as OULIN SCREW, is a Chinese manufacturer of screw and barrel systems for plastics and rubber processing equipment. The company is based in Zhoushan, Zhejiang Province, an industrial cluster widely associated with screw-and-barrel manufacturing, and it serves customers in injection molding, single-screw extrusion, twin-screw extrusion, rubber processing, and related applications.
Founded in 2010, OULIN positions itself as a specialized processor of wear-critical components used in polymer conversion machinery, with product lines that include injection screws and barrels, extrusion screws and cylinders, twin conical and twin parallel screw-and-barrel assemblies, segmented screw elements, and rubber screw-and-barrel sets. The company states that it operates a modern factory and a complete processing system, and its equipment list includes CNC turning and milling, PTA alloy welding, grinding, drilling, and nitriding-related production steps.
History and development
OULIN states that it was established in 2010 and originally focused on producing high-quality screw and barrel components for customers in the plastics processing sector. Its own materials also describe the company as drawing on the skilled labor base and industrial supply chain concentration of Zhoushan, which it presents as a core competitive advantage.
Several development milestones are visible in the available sources:
- 2010: Company establishment and initial focus on screw-and-barrel manufacture.
- 2012: The company states that it began exporting screw barrels after building its domestic business base.
- Recent years: OULIN describes the expansion of its production system into a modern factory with a full machining workflow and a broader product portfolio for multiple machinery types.
Some third-party commercial directories also describe the company as a manufacturer/factory and trading company with OEM/ODM capability and export activity in multiple regions.
Business operations and segments
OULIN’s operations are centered on the manufacture of wear-resistant metal components for polymer-processing machines. Its business is organized around the machinery platforms it serves rather than around consumer-facing products.
The company’s listed product categories include:
- Injection molding screws and barrels
- Single-screw extrusion screws and cylinders
- Twin conical screw-and-barrel systems
- Twin parallel screw-and-barrel systems
- Segmented screw elements and segmented barrels
- Rubber screw-and-barrel systems
The company indicates that it can supply components for a wide range of machine sizes, including injection molding machines, single-screw extruders, conical twin-screw extruders, parallel twin-screw extruders, and rubber extruders.
Products and technologies
OULIN’s product offering is built around the core engineering challenge of improving wear resistance, corrosion resistance, and service life in high-temperature, high-shear processing environments.
Its materials describe the use of:
- Alloy steel as a base material in many products
- 42CrMo base steel for some injection-molding applications
- SKD61 full-hardened screw-and-barrel products for demanding applications
- Hard chrome coating for corrosion-critical uses, including recycled or engineering-plastics processing
- PTA welding, heat treatment, cutting, and casting as part of manufacturing routes
The company also states that, depending on customer requirements, it can offer quality grades ranging from nitriding-grade to bimetallic-grade products. Its process descriptions note a nitriding cycle of 144 hours and claim that this treatment improves torque performance and abrasive and corrosive resistance.
Examples of reported product specifications and applications include:
- 100 mm PE film extrusion screw and barrel for film extrusion
- 55 mm injection molding screw and barrel for PC applications
- 100 mm twin parallel screw and barrel for PVC compounding
- 150 mm extruder screw barrel for materials such as LDPE, LLDPE, HDPE, masterbatch, calcium carbonate blends, PP, and UV-stabilized compounds
- Bimetallic screw-and-barrel assemblies for plastic recycling machinery
The company also indicates dimensional and machine-range coverage, including screw diameters from 20 mm to 300 mm or wider depending on product type, clamping force ranges from 100 kN to 35,000 kN, and shot weights up to 30,000 g in certain injection-related offerings.
Applications and end markets
OULIN’s products are used in machinery serving a broad set of plastics and rubber conversion markets. The most clearly identified end markets include:
- Injection molding for general plastics and engineering plastics
- Film extrusion
- PVC compounding and profile production
- Recycled polymer processing
- Rubber processing
- Masterbatch and filled-compound production
The company also notes that its components are used in machinery for other industrial and specialty applications, including chemical fiber, extrusion, and some non-plastics processing sectors on its broader catalog descriptions.
Global presence and market position
Available listings indicate that OULIN exports to markets including India, Spain, Chile, Italy, Iran, Mexico, Turkey, Russia, and others, with one source stating that its products have been exported to more than 20 countries. A supply-chain database also shows import activity associated with markets such as India and Vietnam in recent years, though the dataset is limited and should be treated as indicative rather than exhaustive.
Commercial platform listings place the company in the Zhoushan screw-and-barrel cluster and describe its trade profile as serving South America, Europe, Southeast Asia, the Middle East, Africa, and domestic China. The company is also shown on industrial marketplaces and exhibition-related platforms, including the Chinaplas exhibitor listing requested by the user, which reflects its participation in plastics industry procurement channels.
Sustainability and environmental considerations
The company’s publicly available materials do not present a detailed sustainability report or quantified emissions targets. However, its product catalogue includes components for recycling-oriented extrusion and pelletizing applications, which aligns with broader industry efforts to process reclaimed polymers and reduce material loss in manufacturing loops.
From an industry perspective, screw-and-barrel manufacturers influence sustainability indirectly through:
- Wear life, which affects maintenance frequency and replacement waste
- Process efficiency, which affects energy use and throughput
- Capability for recycled and filled compounds, which supports circular-material processing
OULIN’s public descriptions emphasize durability, corrosion resistance, and long service life, but they do not provide third-party verified lifecycle data, energy metrics, or environmental certifications in the sources reviewed.
Financial performance and economic impact
No audited financial statements or detailed revenue disclosures were found in the supplied sources. The available commercial listings instead provide operational indicators such as a reported workforce of 49 employees, OEM/ODM capability, and annual production capacity figures for some product lines ranging from roughly 300 to 700 sets per year depending on the item.
Economically, the company contributes to the upstream supply chain that supports China’s plastics machinery sector by manufacturing specialized precision components that are essential for machine performance, uptime, and process consistency. Its location in Zhoushan also ties it to one of China’s most concentrated screw-and-barrel manufacturing regions.
Leadership and corporate profile
The sources identify a sales contact, Mr. Ziv Liu, but do not provide a full board structure or formal governance disclosure. The company presents itself as a manufacturer emphasizing customer service, after-sales support, and custom production to specification.
Public product pages also mention:
- OEM/ODM service
- A 180-day warranty on selected products
- Replacement promises in the event of quality defects on certain listings
These statements suggest a market model oriented toward customized industrial supply rather than mass consumer branding.
Innovations and future outlook
OULIN’s forward position appears to rest on continued specialization in high-wear, corrosion-resistant screw-and-barrel engineering for increasingly demanding plastics applications. Its technical offerings already cover recycled polymers, filled compounds, PVC processing, engineering plastics, and rubber machinery, which are all segments where material abrasion and thermal stability matter heavily.
Its public materials imply several strategic directions:
- Greater use of bimetallic and hardened constructions for longer service life
- Expanded support for recycling and reprocessing machinery
- Continued use of custom OEM/ODM manufacturing for machine builders and processors
The company’s future competitiveness will likely depend on process precision, alloy and surface-treatment quality, export execution, and its ability to serve evolving polymer processing requirements, particularly in recycled-content and high-performance compound applications.
Summary
ZHOUSHAN JINTANG OULIN MACHINERY CO., LTD. is a specialized Zhoushan-based manufacturer of screw-and-barrel components for plastics and rubber machinery. Its profile reflects the strengths of the Zhoushan industrial cluster, with a product portfolio spanning injection, extrusion, twin-screw, and rubber-processing systems, and with technical emphasis on wear resistance, surface treatment, and custom fabrication.
References
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CPS+ eMarketplace. (n.d.). ZHOUSHAN JINTANG OULIN MACHINERY CO., LTD.ZHOUSHAN JINTANG OULIN MACHINERY CO., LTD.. CPS+ eMarketplace. https://www.chinaplasonline.com/eMarketplace/ExhibitorInfo?CompId=1009245Link