INDUSTRY COMPONENT

Bimetallic Liner Tube

Bimetallic liner tube for polymer extrusion barrels providing wear resistance and thermal conductivity.

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Component Specifications

Definition
A specialized cylindrical component installed inside polymer extrusion barrels, constructed from two metallurgically bonded layers: an inner wear-resistant alloy (typically cobalt/nickel-based) and an outer structural steel layer. This dual-material design optimizes performance by combining abrasion resistance with structural integrity and efficient heat transfer.
Working Principle
Operates by creating a durable, low-friction inner surface that withstands continuous polymer flow while maintaining precise temperature control through the conductive outer layer. The metallurgical bond ensures thermal expansion compatibility and prevents delamination under operational stresses.
Materials
Inner layer: Cobalt-based alloy (Stellite 6/12) or Nickel-based alloy (Colmonoy); Outer layer: Carbon steel (AISI 4140/4340) or Alloy steel; Bonding method: Centrifugal casting or powder metallurgy fusion.
Technical Parameters
  • Length 500-4000 mm
  • Inner Diameter 25-300 mm
  • Wall Thickness 5-40 mm
  • Pressure Rating Up to 100 MPa
  • Surface Roughness Ra 0.2-0.8 μm
  • Operating Temperature Up to 400°C
  • Hardness (Inner Layer) HRC 55-65
Standards
ISO 9001, DIN 8580, ASTM A532

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Bimetallic Liner Tube.

bimetallic liner extrusion barrel liner polymer extrusion wear-resistant tube cobalt alloy liner extrusion machine parts plastic processing equipment Bimetallic Liner Tube Bimetallic Liner Tube in Rubber and Plastic Product Manufacturing

Parent Products

This component is used in the following industrial products

Polymer Extrusion Barrel Liner

Wear-resistant inner sleeve for polymer extrusion barrels

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Engineering Analysis

Risks & Mitigation
  • Thermal fatigue cracking
  • Delamination of layers
  • Abrasive wear from filled polymers
  • Corrosion from processing additives
  • Improper installation causing stress concentrations
FMEA Triads
Trigger: Excessive thermal cycling
Failure: Thermal fatigue cracks in inner layer
Mitigation: Implement controlled heating/cooling cycles; use temperature monitoring systems
Trigger: High abrasive polymer compounds
Failure: Premature wear of inner surface
Mitigation: Select appropriate alloy grade; implement polymer filtration; optimize processing parameters
Trigger: Improper installation
Failure: Delamination or poor thermal transfer
Mitigation: Follow manufacturer installation procedures; use proper tooling; verify interference fit

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
ID tolerance: ±0.05 mm; OD tolerance: ±0.1 mm; Straightness: 0.1 mm/m
Test Method
Ultrasonic testing for bond integrity, hardness testing (Rockwell C), dimensional verification, pressure testing

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What are the main advantages of bimetallic liners over single-material liners?

Bimetallic liners combine the wear resistance of hard alloys with the structural strength and thermal conductivity of steel, offering longer service life, better temperature control, and reduced maintenance compared to single-material alternatives.

How are bimetallic liner tubes installed in extrusion barrels?

They are typically shrink-fitted or hydraulically pressed into the barrel housing, creating an interference fit that ensures thermal contact and prevents rotation during operation.

What maintenance is required for bimetallic liner tubes?

Regular inspection for wear patterns, cleaning to prevent polymer degradation buildup, and monitoring of temperature profiles. Replacement is needed when wear exceeds manufacturer specifications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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