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Zhoushan, China — A Well-Known Screw & Barrel Manufacturing Hub

Precision Screw & Barrel Manufacturer — Factory Direct from Zhoushan, China

We manufacture precision screws and barrels for plastic extrusion, injection molding and related processing equipment, with CNC machining and custom manufacturing support from Zhoushan, China.

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10+
Years Experience
Global
Customer Support
Export
International Markets
Responsive
Technical Support
Our Product Range

Screws and Barrels for Plastic Processing Equipment

We machine single screw barrels, twin screw barrels, extruder screw barrels, spare parts and related components using CNC and 5-axis equipment.

Conical Twin Screw Barrel manufactured by Nanhaiya for plastic extrusion and injection molding

Conical Twin Screw Barrel

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Single Screw manufactured by Nanhaiya for plastic extrusion and injection molding

Single Screw

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Parallel Twin Screw manufactured by Nanhaiya for plastic extrusion and injection molding

Parallel Twin Screw

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Injection Molding Screw manufactured by Nanhaiya for plastic extrusion and injection molding

Injection Molding Screw

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Spare Parts manufactured by Nanhaiya for plastic extrusion and injection molding

Spare Parts

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Plastic Extruder Machine manufactured by Nanhaiya for plastic extrusion and injection molding

Plastic Extruder Machine

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Segment Screw manufactured by Nanhaiya for plastic extrusion and injection molding

Segment Screw

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Why Choose Us

The Nanhaiya Advantage

With more than a decade of screw and barrel manufacturing experience in Zhoushan, Nanhaiya works with overseas buyers on custom production, technical review and factory-direct quotations.

Factory-Direct Pricing

Work directly with our Zhoushan factory for pricing, production details and quality control communication.

CNC & 5-Axis Machining

Advanced manufacturing with CNC lathes and 5-axis machining centers for precision machining and dimensional inspection.

Quality Inspection Support

Inspection requirements and warranty terms are agreed for each order based on the product type, application and order agreement.

Custom Screw Design

Tailored screw geometry and barrel configurations engineered for your specific polymer and application.

Responsive Technical Support

Our team reviews technical requirements and prepares quotations for international buyers.

International Customer Support

We support plastic machinery customers across Europe, the Americas, the Middle East, and Southeast Asia.

Our Manufacturing Base

Our Modern Factory in Zhoushan

Located in Zhoushan — a well-known screw and barrel manufacturing hub in China — our facility combines decades of regional expertise with modern manufacturing technology. Our workshop houses advanced CNC lathes, deep-hole drilling machines, and 5-axis machining centers.

  • Advanced CNC and 5-axis machining centers
  • Strict quality control at every production stage
  • Dedicated alloy spray welding workshop
  • Production capacity for custom screw barrel orders and replacement components
Learn More About Our Facility
Factory workshop interior with CNC machines
Skilled workers operating precision lathes
Wide view of the Nanhaiya factory workshop
Workers machining precision screw shafts
Global Reach

Serving International Markets

Our precision screws and barrels support plastic processing customers in international markets, from high-volume extrusion plants to specialty polymer facilities.

Nanhaiya global market distribution map with factory location in Zhoushan, China
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Technical Insights

Latest from Our Blog

Industry knowledge, product guides, and manufacturing tips from our engineering team.

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Twin Screw Extruder Factory: Spot Real Makers, Skip the Middlemen

Learn how to identify a genuine twin screw extruder factory, audit manufacturing quality, evaluate key specs, and avoid trading companies posing as real makers.

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cutaway schematic view of a twin screw extruder showing internal components from drive motor to die head

Schematic Diagram Twin Screw Extruder Decoded From Drive to Die

Learn how to read a schematic diagram of a twin screw extruder zone by zone - from drive motor to die head - with component labels, screw element codes, and barrel mapping.

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inside a twin screw extruder machine factory where precision engineering and assembly define equipment quality

Twin Screw Extruder Machine Factory: What Buyers Learn Too Late

Learn what a twin screw extruder machine factory actually produces, how to evaluate manufacturers, spot red flags, and calculate total cost of ownership before buying.

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Precision metal machining process

Need a Custom Screw Barrel Solution?

Get a custom quotation for precision screws and barrels tailored to your exact specifications. Our team can review your machine information, processed material, drawings, photos or worn samples so that we can prepare a quotation and carry out a technical review.

Request a Quote Custom Design Services