Industry-Verified Manufacturing Data (2026)

Metering Section

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Metering Section 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 Metering Section is characterized by the integration of Flight and Root. In industrial production environments, manufacturers listed on CNFX commonly emphasize Tool Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The final section of an extrusion screw where molten material is precisely metered and pumped at constant pressure through the die.

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Product Specifications

Technical details and manufacturing context for Metering Section

Definition
The metering section is the downstream zone of an extrusion screw, following the melting/compression section. Its primary function is to homogenize the molten polymer, eliminate pressure fluctuations, and deliver a consistent volumetric flow rate to the die. It ensures uniform product dimensions and quality by maintaining steady pressure and temperature.
Working Principle
The metering section features a constant, shallow flight depth. As the screw rotates, the molten material is dragged forward by the screw flights. The shallow channel creates shear and backpressure, which further homogenizes the melt, removes any remaining solid particles, and generates the pressure required to force the material through the die. The constant geometry allows for predictable pumping and pressure generation.
Common Materials
Tool Steel, Nitrided Steel, Bimetallic Alloys, Stainless Steel
Technical Parameters
  • Flight depth (channel depth) in the metering section, typically shallow and constant. (mm) Customizable
Components / BOM
  • Flight
    The helical ridge that conveys, shears, and pressurizes the material.
    Material: Tool Steel
  • Root
    The central shaft of the screw; the surface between flights where channel depth is measured.
    Material: Tool Steel
  • Flight Land
    The outer surface/edge of the flight that runs close to the barrel wall, providing sealing and shear.
    Material: Wear-Resistant Alloy
Engineering Reasoning
15-80 bar at 0.5-2.5 MPa·s melt viscosity
Pressure drop below 12 bar or exceeding 85 bar at 220°C polymer temperature
Design Rationale: Shear-induced polymer degradation occurs when shear rate exceeds 1000 s⁻¹, causing molecular chain scission and viscosity reduction
Risk Mitigation (FMEA)
Trigger Barrel temperature deviation exceeding ±5°C from setpoint
Mode: Melt viscosity fluctuation >10% causing pressure instability
Strategy: Triple-zone PID control with redundant thermocouples and thermal buffer design
Trigger Screw wear increasing flight clearance beyond 0.15% of diameter
Mode: Pressure drop of 25% at constant screw speed
Strategy: Nitrided steel construction with 62 HRC surface hardness and 0.8 mm wear allowance

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Metering Section.

extrusion screw metering section rubber extrusion metering pump plastic manufacturing screw flight bimetallic extrusion screw components constant pressure extrusion die feed

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Extrusion Screw
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 70 MPa (10,000 psi) typical, 100 MPa (14,500 psi) maximum
flow rate: 10-10,000 kg/hr (screw diameter dependent)
temperature: 150-350°C (depending on polymer type)
slurry concentration: Not applicable - designed for molten polymers, not slurries
Media Compatibility
✓ Polyethylene (LDPE/HDPE) ✓ Polypropylene (PP) ✓ Polyvinyl Chloride (PVC)
Unsuitable: Abrasive-filled compounds (e.g., glass fiber reinforced polymers above 30% filler content)
Sizing Data Required
  • Required output rate (kg/hr)
  • Polymer viscosity at processing temperature
  • Screw diameter and L/D ratio

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Flow Measurement Drift
Cause: Accumulation of particulate matter or scaling on internal components (orifice plates, turbine blades, ultrasonic transducers), leading to inaccurate flow readings and calibration errors.
Seal or Gasket Failure
Cause: Chemical degradation, thermal cycling, or mechanical fatigue of sealing elements, resulting in leaks, pressure loss, and potential process fluid contamination or environmental release.
Maintenance Indicators
  • Unexplained fluctuations or deviations in flow readings compared to other process indicators (e.g., pump discharge pressure, tank levels).
  • Visible leaks, weeping, or residue buildup around flanges, fittings, or sensor housings, often accompanied by audible hissing or dripping.
Engineering Tips
  • Implement routine inline verification or calibration against a master meter or known volumetric standard to detect and correct drift early, especially after process upsets or changes in fluid composition.
  • Use compatible, high-quality sealing materials rated for the specific process fluid, temperature, and pressure, and follow proper torque procedures during installation to prevent over-compression or under-compression.

Compliance & Manufacturing Standards

Reference Standards
ISO 5167: Flow measurement by means of pressure differential devices ANSI B16.5: Pipe Flanges and Flanged Fittings CE Marking: Pressure Equipment Directive 2014/68/EU
Manufacturing Precision
  • Bore diameter: +/-0.05mm
  • Surface flatness: 0.08mm per 100mm
Quality Inspection
  • Pressure Leak Test
  • Dimensional Verification with CMM

Factories Producing Metering Section

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

S Sourcing Manager from United Arab Emirates Jan 12, 2026
★★★★★
"The Metering Section we sourced perfectly fits our Rubber and Plastic Product Manufacturing production line requirements."
Technical Specifications Verified
P Procurement Specialist from Australia Jan 09, 2026
★★★★☆
"Found 18+ suppliers for Metering Section on CNFX, but this spec remains the most cost-effective. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Singapore Jan 06, 2026
★★★★★
"The technical documentation for this Metering Section is very thorough, especially regarding technical reliability."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

14 sourcing managers are analyzing this specification now. Last inquiry for Metering Section from Mexico (46m ago).

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Frequently Asked Questions

What is the primary function of the metering section in extrusion screws?

The metering section precisely meters molten material and pumps it at constant pressure through the extrusion die, ensuring consistent product dimensions and quality in rubber and plastic manufacturing.

Which materials are best for metering section components in abrasive applications?

Bimetallic alloys and nitrided steel offer superior wear resistance for abrasive materials, while tool steel provides durability for general applications, and stainless steel is preferred for corrosive environments.

How do flight land dimensions affect metering section performance?

Flight land width and clearance directly impact pumping efficiency, pressure stability, and melt temperature control. Proper dimensions minimize leakage backflow and ensure consistent throughput to the die.

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 Specifications verified by CNFX Industrial Index (v2.6.03) for Rubber and Plastic Product Manufacturing sector.

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