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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.

a blown film extrusion line in operation where the bubble's behavior reveals critical clues about process stability and film quality

Blown Film Problems Decoded: What Your Bubble Is Telling You

Solve blown film problems from resin to roll. Learn to identify gels, gauge variation, bubble instability, die defects, and downstream failures with actionable fixes.

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Single-screw extruder with a control cabinet, tall hopper and drive motor in an outdoor equipment yard.

Single Screw Extruder Supplier Red Flags You Can't Afford To Miss

Learn how to evaluate a single screw extruder supplier with this buyer's guide covering pricing, screw and barrel tech, new vs used trade-offs, and red flags.

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feed zone of an industrial extruder where polymer pellets enter the screw channel the critical area where feeding instability originates

Your Extruder Feeding Instability Isn't Random — Here's Why

Extruder feeding instability causes surging output and scrap. Learn the 6 root causes, polymer-specific fixes, wear diagnostics, and preventive protocols.

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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