---
title: "Temperature-Controlled Barrel"
industry: "Rubber and Plastic Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TEMPERATURE_CONTROLLED_BARREL"
  data_integrity_hash: "2b4f1864400be8d3da7fa72c9bd566ee"
  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:TEMPERATURE_CONTROLLED_BARREL"
  data_source_uri: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/temperature-controlled-barrel.md"
  official_resource_url: "https://cnfx.com/industry/rubber-and-plastic-product-manufacturing/product/temperature-controlled-barrel"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "125-450°C"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 316
    unit: "L"
    consequence: "Coefficient of thermal expansion mismatch between barrel (17.3 μm/m·°C) and heating elements (13.5 μm/m·°C) creates cyclic thermal stresses exceeding fatigue limit (140 MPa at 10^6 cycles)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "PID controller integral windup during rapid temperature setpoint changes exceeding 50°C/min"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement anti-windup algorithm with back-calculation and conditional integration at 90% of setpoint"
  - node_2:
      trigger: "Thermal gradient exceeding 15°C/cm along barrel axis due to uneven heater band power distribution"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install three-zone PID control with RTD sensors at 120° intervals and cross-coupled control algorithm"
bom_nodes:
  barrel-body-liner:
    type: "component"
    urn: "URN:CNFX:ME:BARREL_BODY_LINER"
    interface_type: "physical-logic-coupled"
  heating-bands:
    type: "part"
    urn: "URN:CNFX:ME:HEATING_BANDS"
    interface_type: "physical-logic-coupled"
  thermocouple-well:
    type: "component"
    urn: "URN:CNFX:ME:THERMOCOUPLE_WELL"
    interface_type: "physical-logic-coupled"
  thermal-insulation-jacket:
    type: "device"
    urn: "URN:CNFX:ME:THERMAL_INSULATION_JACKET"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - DIRECTIVE 2014/68/EU (PRESSURE EQUIPMENT DIRECTIVE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/rubber-and-plastic-product-manufacturing/product/temperature-controlled-barrel.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ca0f4cc10936b773d5883cd4c1e7a772c15237171d709ea6b0f0955e6b0e8945"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Temperature-Controlled Barrel

## 1. Technical Definition
A precisely temperature-regulated cylindrical chamber in a Polymer Melt Flow Index Tester where polymer granules are melted under controlled conditions.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **125-450°C**. Failure boundary: **Thermal stress exceeds yield strength of 316L stainless steel (205 MPa at 450°C) or temperature exceeds 500°C causing carbide precipitation**, Mechanism: **Coefficient of thermal expansion mismatch between barrel (17.3 μm/m·°C) and heating elements (13.5 μm/m·°C) creates cyclic thermal stresses exceeding fatigue limit (140 MPa at 10^6 cycles)**.

### 2.1 Analytical Physics Model
Governed by the **LMTD Logarithmic Mean Temperature Difference**:

> **Primary Equation**: $Q = U \cdot A \cdot \Delta T_{lm}$  
> **Engineering Impact**: Sizing validation for pasteurization and cooling tunnels.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| U | Heat Transfer Coeff | Engineering Constant |
| A | Area | Engineering Constant |
| \Delta T_{lm} | LMTD | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| PID controller integral windup during rapid temperature setpoint changes exceeding 50°C/min | 8 | Overshoot to 550°C causing polymer degradation and char formation | Implement anti-windup algorithm with back-calculation and conditional integration at 90% of setpoint |
| Thermal gradient exceeding 15°C/cm along barrel axis due to uneven heater band power distribution | 8 | Differential expansion creates bending moment of 850 N·m causing permanent barrel deformation | Install three-zone PID control with RTD sensors at 120° intervals and cross-coupled control algorithm |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Heating Band(s)](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/heating-bands.md) `(Standalone System)`
- [Thermal Insulation Jacket](https://cnfx.com/llms/industry/basic-metal-manufacturing/product/thermal-insulation-jacket.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Polymer Granule Feeder**, **Temperature Calibration System**, **Data Acquisition and Control Unit**  
**Downstream Applications**: Polymer Melt Flow Index Test Reports, Quality Control Data Sheets, Material Certification Documents  

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

### Q: What temperature range does this temperature-controlled barrel support for polymer testing?
**A**: Our temperature-controlled barrels typically support ranges from ambient to 400°C, with precise regulation within ±0.5°C for accurate polymer melt flow index measurements in rubber and plastic manufacturing.

### Q: Why is stainless steel (316L) used for the barrel construction?
**A**: 316L stainless steel provides excellent corrosion resistance, high-temperature stability, and minimal contamination risk, ensuring consistent test results and durability when melting various polymer formulations.

### Q: How does the thermal insulation jacket improve testing accuracy?
**A**: The thermal insulation jacket minimizes heat loss and maintains uniform temperature distribution throughout the barrel, preventing temperature gradients that could affect polymer melt consistency and flow index measurements.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - DIRECTIVE 2014/68/EU (PRESSURE EQUIPMENT DIRECTIVE)

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

### 🌐 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**: TEMPERATURE_CONTROLLED_BARREL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 1fb66ab1
