Industry-Verified Manufacturing Data (2026)

Polymer Extrusion Barrel Liner

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Polymer Extrusion Barrel Liner used in the Plastics in Primary Forms Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Polymer Extrusion Barrel Liner is characterized by the integration of Bimetallic Liner Tube and Cooling Channel Insert. In industrial production environments, manufacturers listed on CNFX commonly emphasize Bimetallic Alloy (steel base with hard-facing) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Wear-resistant inner sleeve for polymer extrusion barrels

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Product Specifications

Technical details and manufacturing context for Polymer Extrusion Barrel Liner

Definition
A precision-machined cylindrical liner that fits inside extrusion barrels to protect against polymer abrasion and corrosion. This component ensures consistent polymer flow and temperature distribution during plastic processing. It extends barrel lifespan by providing a sacrificial wear surface that can be replaced independently. Critical for maintaining dimensional accuracy and preventing contamination in high-volume production.
Working Principle
Acts as a sacrificial wear surface between rotating screw and stationary barrel, reducing friction and preventing direct barrel damage while maintaining thermal conductivity for polymer melting.
Common Materials
Bimetallic Alloy (steel base with hard-facing), Nitrided Steel, Carbide-Reinforced Composite
Technical Parameters
  • Heat transfer efficiency for polymer melting (W/m·K) Per Request
  • Precision bore tolerance for screw clearance (mm) Per Request
Components / BOM
  • Bimetallic Liner Tube
    Primary wear-resistant cylindrical body
    Material: Steel substrate with alloy overlay
  • Cooling Channel Insert Optional
    Integrated cooling passage for temperature control
    Material: Copper alloy or stainless steel
  • Mounting Flange
    Interface for securing liner to barrel housing
    Material: Carbon steel
  • Thermal Barrier Coating Optional
    Surface treatment to reduce heat transfer
    Material: Ceramic or composite coating
Engineering Reasoning
15-45 MPa internal pressure, 180-280°C barrel temperature, 0.1-1.5 m/s polymer flow velocity
Liner wear depth exceeding 0.5 mm, barrel temperature exceeding 320°C, internal pressure surpassing 55 MPa
Design Rationale: Abrasive wear from polymer additives (silica, talc) at shear rates >1000 s⁻¹, thermal degradation of liner material above glass transition temperature (Tg+50°C), pressure-induced microcracking at stress concentrations >350 MPa
Risk Mitigation (FMEA)
Trigger Polymer melt containing 15-25% abrasive mineral fillers (e.g., 20 μm silica particles)
Mode: Progressive liner wall thinning reducing barrel diameter by >0.8 mm over 2000 operating hours
Strategy: Hardened bimetallic liner with 62-65 HRC surface hardness, chromium carbide overlay ≥0.3 mm thickness
Trigger Barrel heating zone temperature gradient exceeding 40°C/cm along 1.5 m length
Mode: Thermal stress cracking at liner-to-barrel interface due to 150-200°C differential expansion
Strategy: Precision-ground interference fit of 0.05-0.08 mm, controlled induction heating installation at 200-250°C

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Polymer Extrusion Barrel Liner.

extruder barrel sleeve polymer processing liner compounding barrel insert bimetallic polymer extrusion barrel liner nitrided steel extrusion barrel sleeve carbide-reinforced composite barrel liner wear-resistant extrusion barrel inner sleeve high-temperature polymer extrusion liner

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 50 MPa (7,250 psi)
flow rate: Up to 500 kg/h (1,102 lb/h)
temperature: Up to 300°C (572°F)
slurry concentration: Not applicable (for polymer melts only)
Media Compatibility
✓ Polyethylene (PE) ✓ Polypropylene (PP) ✓ Polyvinyl Chloride (PVC)
Unsuitable: Highly abrasive filled polymers (e.g., glass fiber >40%)
Sizing Data Required
  • Barrel inner diameter (mm/in)
  • Required liner thickness (mm/in)
  • Extruder screw diameter (mm/in)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive wear
Cause: High filler content in polymer (e.g., glass fibers, minerals) causing mechanical abrasion against liner surface during extrusion
Thermal degradation
Cause: Excessive barrel temperatures or localized hot spots leading to polymer degradation and corrosive byproducts attacking liner material
Maintenance Indicators
  • Visible scoring or grooving on liner surface during inspection
  • Audible scraping or grinding noises during operation indicating metal-to-metal contact
Engineering Tips
  • Implement proper material transition procedures to avoid sudden temperature changes that cause thermal shock
  • Use appropriate screw designs and maintain proper screw-to-liner clearance to minimize mechanical wear

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ASTM D638 - Standard Test Method for Tensile Properties of Plastics CE Marking - EU conformity for machinery safety
Manufacturing Precision
  • Bore diameter: +/-0.03mm
  • Surface roughness: Ra 0.4μm max
Quality Inspection
  • Hardness testing (Rockwell C scale)
  • Dimensional verification with CMM

Factories Producing Polymer Extrusion Barrel Liner

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

T Technical Director from Australia Feb 27, 2026
★★★★★
"Standard OEM quality for Plastics in Primary Forms Manufacturing applications. The Polymer Extrusion Barrel Liner arrived with full certification."
Technical Specifications Verified
P Project Engineer from Singapore Feb 24, 2026
★★★★☆
"Great transparency on the Polymer Extrusion Barrel Liner components. Essential for our Plastics in Primary Forms Manufacturing supply chain. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Germany Feb 21, 2026
★★★★★
"The Polymer Extrusion Barrel Liner we sourced perfectly fits our Plastics in Primary Forms Manufacturing production line requirements."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

11 sourcing managers are analyzing this specification now. Last inquiry for Polymer Extrusion Barrel Liner from Germany (1h ago).

Frequently Asked Questions

What are the main advantages of bimetallic alloy liners over nitrided steel?

Bimetallic liners offer superior wear resistance and longer service life due to their steel base with hard-facing layer, making them ideal for abrasive polymer processing, while nitrided steel provides good corrosion resistance at lower cost.

How does the thermal barrier coating improve extrusion performance?

The thermal barrier coating reduces heat transfer to the barrel, maintaining consistent polymer melt temperature, improving energy efficiency, and preventing material degradation during extended operation.

What factors determine the optimal wall thickness for an extrusion barrel liner?

Optimal wall thickness depends on operating pressure, material abrasiveness, thermal expansion requirements, and cooling system design, typically ranging from 10-30mm for most polymer extrusion applications.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Plastics in Primary Forms Manufacturing sector.

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