---
title: "Extruder Barrel"
industry: "Rubber and Plastic Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:EXTRUDER_BARREL"
  data_integrity_hash: "33d3b063b55d5ac0dc37fe8582d1c510"
  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:EXTRUDER_BARREL"
  data_source_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/extruder-barrel.md"
  official_resource_url: "https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/extruder-barrel"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "10-100 MPa internal pressure, 150-350°C barrel temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "Thermal fatigue from cyclic heating/cooling causing microcrack initiation at stress concentrations"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Polymer degradation causing acidic byproducts"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Nitrided surface treatment with 0.3mm case depth"
  - node_2:
      trigger: "Screw deflection exceeding 0.1mm radial clearance"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Barrel bore straightness tolerance of 0.02mm/m with induction hardening to 55 HRC"
bom_nodes:
  barrel-liner:
    type: "component"
    urn: "URN:CNFX:ME:BARREL_LINER"
    interface_type: "physical-logic-coupled"
  heating-bands:
    type: "part"
    urn: "URN:CNFX:ME:HEATING_BANDS"
    interface_type: "physical-logic-coupled"
  cooling-channels:
    type: "component"
    urn: "URN:CNFX:ME:COOLING_CHANNELS"
    interface_type: "physical-logic-coupled"
  feed-throat:
    type: "component"
    urn: "URN:CNFX:ME:FEED_THROAT"
    interface_type: "physical-logic-coupled"
  venting-port:
    type: "component"
    urn: "URN:CNFX:ME:VENTING_PORT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - DIRECTIVE 2006/42/EC ON MACHINERY SAFETY"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/extruder-barrel.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "9fe5971d5097c2bf0025a8e43f23f3d15779a9b01fefe4eff121024ded62d0b1"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Extruder Barrel

## 1. Technical Definition
The cylindrical housing that contains the screws and provides the processing environment for polymer compounding.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **10-100 MPa internal pressure, 150-350°C barrel temperature**. Failure boundary: **Yield strength exceeded at 250 MPa internal pressure or 400°C barrel temperature**, Mechanism: **Thermal fatigue from cyclic heating/cooling causing microcrack initiation at stress concentrations**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Polymer degradation causing acidic byproducts | 8 | Corrosion pitting on internal barrel surface | Nitrided surface treatment with 0.3mm case depth |
| Screw deflection exceeding 0.1mm radial clearance | 8 | Metal-to-metal contact causing scoring | Barrel bore straightness tolerance of 0.02mm/m with induction hardening to 55 HRC |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Heating Bands](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/heating-bands.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hopper Loader**, **Water Cooling System**, **Gravimetric Blender**  
**Downstream Applications**: Plastic Pipes, Window Profiles, Plastic Sheets  

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

### Q: What are the advantages of bimetallic alloy extruder barrels over nitrided steel?
**A**: Bimetallic alloy barrels (like Xaloy or Reiloy) offer superior wear resistance and corrosion protection for abrasive or corrosive polymers, extending service life compared to standard nitrided steel barrels.

### Q: How do cooling channels in an extruder barrel improve processing?
**A**: Cooling channels allow precise temperature control along the barrel length, preventing polymer degradation, improving melt consistency, and enabling processing of heat-sensitive materials.

### Q: When should an extruder barrel be replaced or relined?
**A**: Replace or reline the barrel when excessive wear causes increased clearance between screws and barrel liner, leading to reduced output, poor mixing, or inconsistent product quality.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - DIRECTIVE 2006/42/EC ON MACHINERY SAFETY

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Extruder Barrel](https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/extruder-barrel)**

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

> **Reference ID**: EXTRUDER_BARREL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 19930dd2
