Structured Manufacturing Data (2026)

Temperature-Controlled Barrel

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Temperature-Controlled Barrel used in the Rubber and Plastic Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Temperature-Controlled Barrel is characterized by the integration of Barrel Body / Liner and Heating Band(s). In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel (e.g., 316L) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

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

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Product Specifications

Technical details and manufacturing context for Temperature-Controlled Barrel

Definition
The Temperature-Controlled Barrel is a critical component of a Polymer Melt Flow Index (MFI) Tester. It is a cylindrical chamber, typically made of high-grade steel, designed to house and melt a precise quantity of polymer granules. Its primary function is to maintain the polymer sample at a specific, uniform temperature (as per testing standards like ASTM D1238 or ISO 1133) to ensure consistent melt viscosity before the material is extruded through a standardized die under a defined load for flow rate measurement.
Working Principle
The barrel is heated by external heating elements (e.g., band heaters) and its temperature is precisely monitored and regulated by a PID controller via a thermocouple sensor embedded in or near the barrel wall. This creates a stable, uniform thermal environment to completely melt the polymer charge without degradation, ensuring the melt's rheological properties are consistent for accurate flow index determination.
Common Materials
Stainless Steel (e.g., 316L), High-Temperature Alloy Steel
Technical Parameters
  • Internal diameter and length, standardized (e.g., ~9.55mm ID) to match the tester's piston and die specifications. (mm) Customizable
Components / BOM
  • Barrel Body / Liner Part
    Forms the main cylindrical chamber that contains the polymer melt. Provides structural integrity and thermal mass.
    Material: Stainless Steel
  • Heating Band(s)
    Electrical resistance heaters wrapped around the barrel exterior to provide the necessary thermal energy.
    Material: Insulated Metal Sheath with Heating Element
  • Thermocouple Well Part
    A port or embedded channel to house the temperature sensor for accurate feedback to the controller.
    Material: Stainless Steel
  • Thermal Insulation Jacket
    Minimizes heat loss to the environment, improves temperature stability and efficiency.
    Material: Ceramic Fiber or High-Temperature Insulation

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Temperature-Controlled Barrel.

temperature controlled barrel for polymer testing stainless steel melt flow index barrel polymer melt flow tester barrel replacement high temperature alloy steel testing barrel precision barrel for rubber manufacturing testing

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 50 bar (max operating pressure)
flow rate: 0.1-10 g/10 min (MFI test range)
temperature: Ambient to 400°C (typical polymer processing range)
slurry concentration: Not applicable - designed for dry polymer granules only
Media Compatibility
✓ Thermoplastic polymer granules (e.g., PP, PE, PS) ✓ Polymer compounds with additives ✓ Recycled polymer flakes
Unsuitable: Corrosive chemicals or reactive monomers
Sizing Data Required
  • Required melt flow rate range (g/10 min)
  • Maximum polymer processing temperature (°C)
  • Barrel diameter needed for sample volume

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Thermal stress cracking
Cause: Rapid temperature cycling or uneven heating/cooling causing material fatigue and micro-fractures in the barrel wall
Insulation degradation
Cause: Moisture ingress, physical damage, or aging of thermal insulation materials leading to heat loss and temperature control instability
Maintenance Indicators
  • Audible hissing or bubbling sounds from insulation indicating moisture intrusion
  • Visible condensation or frost patterns on the external surface suggesting insulation failure
Engineering Tips
  • Implement gradual temperature ramp-up/down protocols to minimize thermal shock and stress accumulation
  • Establish regular infrared thermography inspections to detect insulation gaps and temperature uniformity issues before failure occurs

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASTM E230/E230M - Standard Specification for Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples CE Marking - Directive 2014/68/EU (Pressure Equipment Directive)
Manufacturing Precision
  • Temperature Control Accuracy: +/-0.5°C
  • Barrel Bore Diameter: +/-0.05mm
Quality Inspection
  • Pressure Test - Hydrostatic or Pneumatic per ASME BPVC Section VIII
  • Temperature Uniformity Survey - Per ASTM E230/E230M

Factories Producing Temperature-Controlled Barrel

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 temperature range does this temperature-controlled barrel support for polymer testing?

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.

Why is stainless steel (316L) used for the barrel construction?

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.

How does the thermal insulation jacket improve testing accuracy?

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.

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 basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Rubber and Plastic Product Manufacturing.

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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