+86-13505809643 Email Us
Single screw for aluminum-plastic panel extrusion View full size

Single screw for aluminum-plastic panel

Single Screw Barrel for Plastic Extrusion

Single screw and extruder screw barrels from Φ15 to Φ300 mm with L/D ratios from 15 to 53. Multiple screw design options are available, including ordinary, gradual-transition, abrupt-transition, barrier, pin, vented, BM and separation types. Materials and surface treatments can be selected according to the processed material and working conditions. Custom manufacturing is supported based on machine models, drawings, photos, samples or measured dimensions.

Quality

Quality Checked

Response

Technical Support

Pricing

Factory Direct

Warranty

Warranty by Order

Inquire on WhatsApp Request a Quote

Product Overview

Single screw barrels are widely used in plastic extrusion equipment for pipe extrusion, film extrusion, sheet extrusion, pelletizing, recycling extrusion and other continuous plastic processing applications. The screw and barrel system directly affects material conveying, melting, mixing, pressure building and output stability.

Nanhaiya manufactures custom single screw barrels according to machine model, drawings, samples or measured dimensions. The screw barrel design can be reviewed based on processed material, screw diameter, L/D ratio, output requirement, wear condition and extrusion application.

Our engineering team can review extruder information, screw barrel photos, drawings, samples or measured dimensions to support quotation and technical evaluation. Whether the application involves PE, PP, PVC, ABS, recycled plastics or filled materials, the final screw and barrel design should be matched to the processed material, equipment and working conditions.

Full Technical Specifications

Parameter Value
Product Type Single screw and barrel for plastic extrusion
Screw Diameter Range Φ15–Φ300 mm
L/D Ratio 15–53
Conventional Materials 38CrMoAlA, SKD61, Cr12MoV, SACM645, nickel-based alloy and GH113
Nitriding Hardness HV900–1000
Nitriding Depth 0.5–0.8 mm
Quenching Hardness HRC55–62, where applicable
Nitriding Brittleness ≤ Grade 2
Surface Roughness Ra0.4
Screw Straightness 0.015 mm
Chrome Plating Hardness ≥950 HV, where applicable
Chrome Plating Thickness 0.05–0.10 mm, where applicable
Alloy Layer Depth 0.8–2.0 mm, where applicable
Screw Design Options Ordinary, gradual-transition, abrupt-transition, barrier, pin, vented, BM and separation types
Screw Starts Single-start or multi-start
Compression Ratio Manufactured according to customer requirements
Barrel Feeding Options Grooved forced-feeding design available as an option
Machine Matching Confirmed according to machine model, drawings, samples or measured dimensions
Final Specification Note Final specifications should be confirmed according to machine model, processed material, output requirement and working conditions.

Final specifications should be confirmed by Nanhaiya engineering before production.

Suitable Applications

This product is commonly used for the following applications, depending on material, machine model and processing conditions. Explore related applications on our Screw Barrel Applications page.

Film blowing
Plastic bag production
Pipe extrusion
Plastic granulation
General plastic extrusion

Common Processing Issues

1

Reduced conveying efficiency

Solution: Screw or barrel wear can reduce material conveying performance and affect extrusion output over time.

2

Poor melting or plasticizing

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

3

Output fluctuation

Solution: Inconsistent output may be related to screw clearance, barrel wear, feeding condition, temperature control or machine settings.

4

High wear with recycled or filled materials

Solution: Recycled plastics, fillers or abrasive compounds may require suitable material selection or surface treatment.

5

Specification confirmation

Solution: When original drawings are unavailable, machine information, photos, samples and measured dimensions can support specification review and manufacturing confirmation.

Material Options

Nanhaiya manufactures single screw and extruder screw barrel components from the following conventional materials:

38CrMoAlA Nitrided Steel (Standard)

The commonly used material for single screw barrels. After nitriding treatment, it achieves a surface hardness of HV900-1000 with a nitriding depth of 0.5-0.8mm. Suitable for processing PE, PP, PS and general-purpose plastics without highly abrasive fillers.

SKD61 / Cr12MoV (High-Hardness Tool Steel)

Tool steel grades commonly used for screw components requiring higher quenching hardness. After quenching treatment, these materials achieve HRC55-62 hardness. Can be designed for applications with moderate wear requirements, depending on processed material and working conditions.

SACM645 (Nitriding Steel)

A nitriding-grade steel similar to 38CrMoAlA, commonly used for screw components. Provides consistent nitriding response with HV900-1000 surface hardness and 0.5-0.8mm nitriding depth.

Ni-Based Alloy & GH113 (Corrosion-Resistant)

For applications involving corrosive additives or aggressive processing environments, Ni-based alloy and GH113 materials are available. These can be designed for processing PVC with stabilizers, fluoropolymer additives or other corrosive compounds, depending on material type and working conditions.

Bimetallic Screw and Barrel (Optional)

For higher wear-resistance requirements, a bimetallic screw and barrel with alloy spray welding is available. Alloy depth is 0.8-2.0mm. This option can be designed for processing glass-fiber reinforced compounds, calcium carbonate-filled materials or recycled plastics with contaminants. Final material selection should be confirmed depending on processed material, screw design, extruder model and working conditions.

For more details on alloy surface treatment, see our alloy spray welding service page.

Surface Treatment Options

Nitriding Treatment (Standard)

The standard surface treatment for Nanhaiya single screw barrels. Gas nitriding produces a hardened surface layer with a nitriding hardness of HV900-1000 and a nitriding depth of 0.5-0.8mm. This provides good wear resistance for general-purpose extrusion of PE, PP, PS and other common thermoplastics.

Quenching Treatment

For screw components made from SKD61 or Cr12MoV tool steel, quenching treatment achieves a surface hardness of HRC55-62. This treatment can be used for applications requiring higher mechanical strength and moderate wear resistance, depending on processed material and working conditions.

Alloy Spray Welding (Optional)

For higher wear-resistance requirements, alloy spray welding can be applied to screw and barrel surfaces. This treatment produces an alloy layer with a depth of 0.8-2.0mm. Can be designed for processing abrasive or corrosive materials, depending on filler type, loading and working conditions. For more details, see our alloy spray welding service page.

Bimetallic Alloy Layer (Optional)

For demanding applications involving highly filled compounds or abrasive materials, a bimetallic alloy layer can be applied to the barrel interior. This provides enhanced wear resistance compared to standard nitriding. Final surface treatment selection should be confirmed depending on processed material, screw design, extruder model and working conditions.

Customization Options

Nanhaiya offers customization for single screw and extruder screw barrel to match your specific equipment and production requirements. The product can be designed according to processed material, application, output requirement and extruder model.

What Can Be Customized

  • Screw type — ordinary, gradual-transition, abrupt-transition, barrier, pin, vented, BM or separation type, depending on the processed material and application
  • Compression ratio — manufactured according to customer requirements
  • Screw starts — single-start or multi-start, depending on the application
  • Barrel feeding design — grooved or forced-feeding designs can be reviewed when required, depending on the material form and feeding conditions
  • Material and surface treatment — selected from 38CrMoAlA, SKD61, Cr12MoV, SACM645, Ni-based alloy, GH113 or bimetallic options depending on processed material and working conditions
  • Screw diameter and L/D ratio — from Φ15 to Φ300 with L/D ratios from 15 to 53

Custom Manufacturing and Machine Matching

Custom manufacturing can be reviewed based on machine models, drawings, photos, samples or measured dimensions. If original drawings are unavailable, our engineering team can evaluate the available machine information and physical references to confirm manufacturing feasibility and technical details.

Final specifications should be confirmed depending on processed material, screw design, extruder model and working conditions. For custom extruder screw design inquiries, contact our engineering team or visit our custom screw design service page.

What Information Do We Need for Quotation?

To support an accurate quotation and technical review for a single screw barrel, please provide the following information when possible:

  • Extruder type and machine model
  • Screw diameter, barrel dimensions and L/D ratio if available
  • Processed material, such as PE, PP, PVC, ABS, recycled plastic or filled compound
  • Application, such as pipe extrusion, film extrusion, sheet extrusion, pelletizing or recycling extrusion
  • Current production issue, wear condition or required specification
  • Drawings, samples, measured dimensions or screw barrel photos

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

Single Screw / Extruder Screw Barrel FAQ

What is a single screw barrel used for?
A single screw barrel is commonly used in plastic extrusion equipment for pipe extrusion, film extrusion, sheet extrusion, pelletizing, recycling extrusion and related plastic processing applications.
Can you manufacture a single screw barrel according to an existing machine or sample?
Yes. Nanhaiya can manufacture single screw barrels according to machine models, drawings, samples, photos or measured dimensions.
What information is needed for a single screw barrel quotation?
Please provide the extruder model, screw diameter, barrel dimensions, processed material, application, wear condition and any available drawings, photos, samples or measured dimensions.
Can the screw barrel be customized for PE, PP, PVC or recycled plastics?
Yes. The screw barrel design, material selection and surface treatment can be reviewed according to the processed material, output requirement, filler content, wear condition and working conditions.
Do you provide single screw barrels for pipe, film and sheet extrusion?
Yes. Single screw barrels can be produced for pipe extrusion, film extrusion, sheet extrusion, pelletizing, recycling extrusion and related plastic extrusion equipment based on machine and application requirements.
More technical FAQs (1)
Can you support projects without original drawings?
Yes. If original drawings are unavailable, machine information, photos, samples and measured dimensions can help our engineering team review the required specification and confirm manufacturing feasibility.

Request a Single Screw Barrel Quote

Send your machine model, processed material, application, drawings, photos or measured dimensions. Nanhaiya can review your single screw barrel requirements and support custom manufacturing, engineering evaluation and quotation.

Chat on WhatsApp Send Inquiry

Or email us directly at info@nhyscrew.com