---
title: "Polymer Extrusion Barrel Liner"
industry: "Plastics in Primary Forms Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:POLYMER_EXTRUSION_BARREL_LINER"
  data_integrity_hash: "60ff7dc6b49dd906f1cfdffff6f97ef0"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:POLYMER_EXTRUSION_BARREL_LINER"
  data_source_uri: "https://cnfx.com/llms/industry/plastics-primary-forms-manufacturing/product/polymer-extrusion-barrel-liner.md"
  official_resource_url: "https://cnfx.com/industry/plastics-primary-forms-manufacturing/product/polymer-extrusion-barrel-liner"
  is_verified_logic: true
attributes:
  thermal_conductivity:
    status: "config-dependent"
    typical_range: "15-45 MPa internal pressure, 180-280°C barrel temperature, 0.1-1.5 m/s polymer flow velocity"
    unit: "W/m·K"
  inner_diameter_tolerance:
    status: "config-dependent"
    typical_range: "15-45 MPa internal pressure, 180-280°C barrel temperature, 0.1-1.5 m/s polymer flow velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 0.5
    unit: "mm"
    consequence: "Abrasive wear from polymer additives (silica, talc) at shear rates &gt;1000 s⁻¹, thermal degradation of liner material above glass transition temperature (Tg+50°C), pressure-induced microcracking at stress concentrations &gt;350 MPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Polymer melt containing 15-25% abrasive mineral fillers (e.g., 20 μm silica particles)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hardened bimetallic liner with 62-65 HRC surface hardness, chromium carbide overlay ≥0.3 mm thickness"
  - node_2:
      trigger: "Barrel heating zone temperature gradient exceeding 40°C/cm along 1.5 m length"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Precision-ground interference fit of 0.05-0.08 mm, controlled induction heating installation at 200-250°C"
bom_nodes:
  bimetallic-liner-tube:
    type: "component"
    urn: "URN:CNFX:ME:BIMETALLIC_LINER_TUBE"
    interface_type: "physical-logic-coupled"
  cooling-channel-insert:
    type: "component"
    urn: "URN:CNFX:ME:COOLING_CHANNEL_INSERT"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
  thermal-barrier-coating:
    type: "component"
    urn: "URN:CNFX:ME:THERMAL_BARRIER_COATING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/plastics-primary-forms-manufacturing/product/polymer-extrusion-barrel-liner.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "7edb4f6ddd1b0e373717a18820ea2c9ef913102564b70e9e636e94d108659e4b"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Polymer Extrusion Barrel Liner

## 1. Technical Definition
Wear-resistant inner sleeve for polymer extrusion barrels

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-45 MPa internal pressure, 180-280°C barrel temperature, 0.1-1.5 m/s polymer flow velocity**. Failure boundary: **Liner wear depth exceeding 0.5 mm, barrel temperature exceeding 320°C, internal pressure surpassing 55 MPa**, Mechanism: **Abrasive wear from polymer additives (silica, talc) at shear rates &gt;1000 s⁻¹, thermal degradation of liner material above glass transition temperature (Tg+50°C), pressure-induced microcracking at stress concentrations &gt;350 MPa**.

### 2.1 Analytical Physics Model
Governed by the **Heat Sterilization F0 Lethality Model**:

> **Primary Equation**: $F_0 = \int_{0}^{t} 10^{(T-121.1)/z} dt$  
> **Engineering Impact**: Validates microbial reduction integrity for aseptic packaging.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| T | Process Temp (°C) | **$T \in [180-280°C]$ °C** (Per `temperature_range`) |
| t | Exposure Time (min) | Engineering Constant |
| z | Z-value | **10 °C** (Standard for *C. botulinum*) |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Polymer melt containing 15-25% abrasive mineral fillers (e.g., 20 μm silica particles) | 8 | Progressive liner wall thinning reducing barrel diameter by &gt;0.8 mm over 2000 operating hours | Hardened bimetallic liner with 62-65 HRC surface hardness, chromium carbide overlay ≥0.3 mm thickness |
| Barrel heating zone temperature gradient exceeding 40°C/cm along 1.5 m length | 8 | Thermal stress cracking at liner-to-barrel interface due to 150-200°C differential expansion | Precision-ground interference fit of 0.05-0.08 mm, controlled induction heating installation at 200-250°C |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| thermal_conductivity | Config-dependent | W/m·K | Verified |
| inner_diameter_tolerance | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Polymer Extruder**, **Barrel Heating System**, **Polymer Feed System**  
**Downstream Applications**: Plastic Pipes, Plastic Profiles, Plastic Sheets  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the main advantages of bimetallic alloy liners over nitrided steel?
**A**: 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.

### Q: How does the thermal barrier coating improve extrusion performance?
**A**: 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.

### Q: What factors determine the optimal wall thickness for an extrusion barrel liner?
**A**: 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.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Polymer Extrusion Barrel Liner](https://cnfx.com/industry/plastics-primary-forms-manufacturing/product/polymer-extrusion-barrel-liner)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: POLYMER_EXTRUSION_BARREL_LINER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: e9c23ffc
