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Plastic extrusion machine in Nanhaiya workshop View full size

Single-screw plastic extruder machine ready for shipment

Plastic Extruder Machine and Screw Barrel Support

Screw barrel support for single-screw, conical twin-screw, and parallel twin-screw plastic extrusion machines — including replacement and custom screw barrels for pipe, profile, film, sheet, WPC and granulation applications.

Quality

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Response

Technical Support

Pricing

Factory Direct

Warranty

Warranty by Order

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Product Overview

Plastic extruder machines are used to process plastic materials into pipes, profiles, sheets, pellets, WPC products and other continuous extrusion products. A stable extrusion process depends not only on the machine frame and downstream equipment, but also on the screw barrel system inside the extruder.

Nanhaiya supports plastic extrusion equipment projects with custom screw barrels, replacement screw barrels and screw barrel matching for single screw extruders, conical twin screw extruders and parallel twin screw extruders. We can review machine models, drawings, samples, measured dimensions and processed materials to support quotation and technical review.

For customers who operate plastic extrusion lines, our focus is on the screw and barrel components that affect plasticizing quality, output stability, material compatibility and wear resistance. Whether the project involves a new plastic extruder machine, an existing extrusion line or a worn screw barrel replacement, our team can help match the screw barrel design to the application requirements.

Technical Specifications

Parameter Value Unit
Product Type Plastic extruder machine support and screw barrel manufacturing
Supported Extruder Types Single screw extruder, conical twin screw extruder, parallel twin screw extruder and related plastic extrusion equipment
Main Component Focus Custom screw barrel, replacement screw barrel, extruder screw barrel and screw barrel for plastic extruder
Application Equipment Plastic extrusion machine, plastic extrusion line, pipe extrusion line, profile extrusion line, sheet extrusion line, pelletizing line, WPC extrusion line and plastic recycling extruder
Processed Materials PVC, PE, PP, ABS, WPC, recycled plastics, filled compounds and other materials depending on formulation and working conditions
Machine Matching Based on machine model, drawings, samples or measured dimensions
Screw Barrel Design Designed according to processed material, output requirement, L/D ratio, screw diameter, wear condition and extrusion application
Surface Treatment Nitriding, alloy spray welding, hard chrome plating or other treatments depending on material and working conditions
Customization Custom manufacturing according to drawings, samples, machine model or measured dimensions
Quotation Information Machine model, screw diameter, barrel dimensions, processed material, application, photos, drawings or worn samples are recommended for quotation review

Final specifications should be confirmed by Nanhaiya engineering before production.

Typical Applications

Pipe extrusion

Screw barrel support for PVC, PE and PP pipe extrusion lines where stable plasticizing and output consistency are important.

Profile extrusion

Screw and barrel matching for PVC profile, WPC profile and other plastic profile extrusion applications.

Sheet extrusion

Screw barrel support for plastic sheet extrusion machines processing PP, PE, ABS and other materials.

Pelletizing and granulation

Screw barrel solutions for pelletizing extruders and plastic granulation equipment.

Plastic recycling extrusion

Replacement and custom screw barrels for recycling extruders processing recycled or mixed plastic materials.

WPC extrusion

Wear-resistant screw barrel options for wood plastic composite extrusion where filled materials may increase abrasion.

Common Processing Issues

1

Unstable output: output fluctuation may be related to screw wear, barrel wear, material feeding, temperature control or screw design mismatch.

2

Poor plasticizing quality: incomplete melting, uneven mixing or unstable melt quality may require screw design review based on material and application.

3

Reduced production capacity: a worn screw barrel can reduce conveying efficiency and affect extrusion output over time.

4

Material leakage or pressure instability: barrel wear, screw clearance and machine condition should be checked when pressure becomes unstable.

5

High wear in filled or recycled materials: abrasive materials may require wear-resistant materials, alloy treatment or bimetallic screw barrel options.

Material Options

Nanhaiya manufactures screw barrels using materials selected based on processed material, wear requirements, and working conditions:

38CrMoAlA Nitrided Steel

Industry-standard material for extruder screws and barrels. Gas nitriding produces a hard, wear-resistant surface layer. Commonly used for PE, PP, PVC, and general-purpose polymer processing.

Wear resistance: Good | Corrosion resistance: Good | Best for: PE, PP, PS, ABS, PVC profiles and pipes

Bimetallic Composite

Centrifugally cast bimetallic liner with high-chromium cast iron on a ductile steel backing. Can be considered for abrasive formulations containing calcium carbonate, glass fiber, or talc. Wear resistance should be confirmed based on filler type and content.

Wear resistance: High | Corrosion resistance: Good | Best for: WPC profiles, filled compounds, recycled materials

Stainless Steel

Corrosion-resistant screw and barrel construction for processing corrosive additives or acidic resin systems. Material selection should be confirmed based on processed material and application requirements.

Wear resistance: Moderate | Corrosion resistance: High | Best for: Corrosive polymers, acidic compounds

Surface Treatment Options

Surface treatment can extend the service life of screw and barrel components and improve wear and corrosion resistance:

Gas Nitriding

A common surface treatment for extruder screws and barrels. Diffusion of nitrogen atoms into the steel surface creates a hard, wear-resistant layer. Suitable for most polymer processing applications.

Bimetallic Spray Welding

Dual-alloy spray coating technology applying tungsten carbide or nickel-based alloy to screw flights and barrel bore. Can be considered for abrasive formulations and recycling applications. Learn more about our alloy spray welding service.

Hard Chrome Plating

Electrolytic chrome deposition providing corrosion resistance and low friction coefficient. Reduces material adhesion and can be considered for heat-sensitive polymers. Commonly applied to screw tips, die heads, and calibrating sleeves.

Customization Options

Nanhaiya can support screw barrel customization based on your machine type, processed material, and application requirements:

Custom Screw Barrel Manufacturing

Custom screw barrels can be manufactured based on processed material, equipment model, screw diameter, L/D ratio, and application. Screw barrel design should be matched with processed material, equipment model, and working conditions.

Replacement Screw Barrel Manufacturing

Replacement screw barrels can be manufactured based on existing dimensions, drawings, photos, or worn samples. Customers can provide screw diameter, barrel dimensions, L/D ratio, and machine brand/model for matching.

Surface Treatment Options

Nitrided, bimetallic, or alloy surface treatment options can be selected based on processed material, filler content, and wear requirements. Surface treatment should be confirmed based on application and working conditions.

Spare Parts Support

Spare parts support can be provided where applicable, including replacement screws, barrels, and related components. Availability should be confirmed based on machine type and part specifications.

Custom Screw Design Service

For specialized applications, our engineering team can provide custom screw design based on your formulation and application requirements. Learn more about our custom screw design service.

What Information Do We Need for Quotation?

To support an accurate quotation and technical review for a plastic extruder machine or extrusion line, please provide the following information when possible:

  • Extruder type: single screw, conical twin screw or parallel twin screw
  • Machine brand, model or equipment photos
  • Screw diameter, barrel dimensions and L/D ratio if available
  • Processed material, such as PVC, PE, PP, WPC, recycled plastic or filled compound
  • Application, such as pipe extrusion, profile extrusion, sheet extrusion, pelletizing or recycling
  • Current production issue, wear condition or replacement requirement
  • Drawings, samples, measured dimensions or worn screw barrel photos

Our team will review the information and follow up with pricing, manufacturing feasibility and technical support.

Frequently Asked Questions

Do you manufacture complete plastic extruder machines?
Nanhaiya mainly focuses on screw barrel manufacturing and related extrusion equipment support. We can support plastic extruder machine projects with custom screw barrels, replacement screw barrels and screw barrel matching for extrusion lines.
What types of plastic extrusion machines can your screw barrels support?
We can support single screw extruders, conical twin screw extruders, parallel twin screw extruders and related plastic extrusion equipment used for pipe, profile, sheet, pelletizing, recycling and WPC extrusion.
Can you make a replacement screw barrel for an existing extruder?
Yes. Replacement screw barrels can be produced according to machine model, drawings, samples, worn parts or measured dimensions. Photos and key dimensions help our team review the quotation more accurately.
What information is needed for a custom screw barrel quotation?
Please provide the extruder type, screw diameter, barrel dimensions, processed material, application, current production issue and any available drawings, photos, samples or measured dimensions.
Can you support screw barrels for plastic recycling extruders?
Yes. For recycling extrusion, the screw barrel design and surface treatment should be reviewed according to material condition, contamination level, filler content and wear requirement.
More technical FAQs (1)
What is the difference between a plastic extruder machine and an extruder screw barrel?
A plastic extruder machine is the complete equipment used for extrusion processing. The extruder screw barrel is the core plasticizing component inside the machine, responsible for conveying, melting, mixing and building pressure during extrusion.

Request a Plastic Extruder Screw Barrel Quote

Send your extruder type, processed material, application, drawings, photos or measured dimensions. Nanhaiya can review your plastic extrusion machine requirements and support custom or replacement screw barrel quotation.

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Or email us directly at info@nhyscrew.com