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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 for plastic extrusion

Conical Twin Screw Barrel

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Single screw barrel for plastic extrusion

Single Screw Barrel

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Parallel Twin Screw Barrel

Parallel Twin Screw Barrel

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Injection molding screw barrel for plastic processing

Injection Molding Screw Barrel

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Extruder Spare Parts

Extruder Spare Parts

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Plastic Extruder Machine

Plastic Extruder Machine

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Planetary Screw

Planetary 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.

precision engineered plasticating screw and barrel assembly ready for quality inspection at a manufacturing facility

How To Vet a Screw Barrel Supplier Before You Waste a Single PO

Learn how to vet a screw barrel supplier with this buyer's guide covering design parameters, materials, manufacturing quality, pricing, and red flags to avoid.

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modular twin screw extruder barrel segments assembled in sequence showing precision bored steel housing with heating and cooling infrastructure

Inside The Twin Screw Extruder Barrel: What Engineers Miss

Learn how twin screw extruder barrel bore geometry, liner metallurgy, wear diagnostics, and port configurations drive process performance, uptime, and cost.

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Nanhaiya exhibition display at CHINAPLAS trade show

Nanhaiya Exhibits at CHINAPLAS 2026 — New Planetary Screw Series

Nanhaiya showcased the latest planetary screw series and alloy spray welding technology at CHINAPLAS 2026, introducing screw barrel and alloy spray welding capabilities to international visitors.

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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