Can I contact factories directly on CNFX?

CNFX is an open directory. Each factory profile provides direct contact information.

INDUSTRY COMPONENT

Spiral Grooves

Spiral grooves are precision-engineered channels in annular dies that distribute polymer melt uniformly for consistent extrusion.

View Specifications

Component Specifications

Definition

Spiral grooves are helical channels machined into the mandrel or body of an annular die, designed to evenly distribute molten polymer around the circumference before it exits through the die gap. They ensure uniform flow, pressure, and temperature distribution, critical for producing consistent cross-sectional profiles in extruded products like pipes, tubes, and films.

Working Principle

The spiral grooves utilize a helical flow path to split and recombine the polymer melt multiple times, balancing pressure and eliminating flow irregularities. As the melt travels through the grooves, it undergoes shear thinning and thermal homogenization, resulting in a uniform annular flow at the die exit.

Materials

Typically made from high-grade tool steels (e.g., H13, D2) or carbide alloys, hardened to 48-52 HRC for wear resistance. Coatings like chromium nitride (CrN) or titanium nitride (TiN) may be applied to reduce friction and corrosion.

Technical Parameters

Helix Angle 30-60 degrees
Groove Depth 0.5-3.0 mm
Groove Width 1.0-5.0 mm
Surface Finish Ra 0.2-0.4 μm
Number of Grooves 4-12

Standards

ISO 9001, DIN 16780

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Spiral Grooves.

Parent Products

This component is used in the following industrial products

Annular Die

A critical component in plastic film blowing machines that shapes molten plastic into a continuous tubular film.

View Product Details

Engineering Analysis

Risks & Mitigation

Groove clogging due to polymer degradation
Uneven wear leading to flow imbalance
Thermal stress cracking in high-temperature operations

FMEA Triads

Trigger: Insufficient cleaning or material contamination
Failure: Partial or complete blockage of grooves
Mitigation: Implement regular maintenance schedules and use purging compounds between material changes.

Trigger: Abrasive polymer compounds or filler materials
Failure: Accelerated wear and loss of groove geometry
Mitigation: Use wear-resistant materials or coatings and monitor extrusion parameters for signs of wear.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

±0.05 mm on groove dimensions, concentricity within 0.01 mm

Test Method

Coordinate measuring machine (CMM) inspection, flow simulation software analysis

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

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.

Related Components

Machine Frame

The rigid structural foundation of a CNC wood router that provides stability, vibration damping, and precision alignment for cutting operations.

pH Sensor Assembly

Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications

Load Cell Assembly

Precision load cell assembly for automated powder dispensing systems

Dust Collection Port

A dust collection port is a critical component in automated powder dispensing systems that captures airborne particulates at the source to maintain clean air quality and prevent cross-contamination.

Frequently Asked Questions

What is the primary function of spiral grooves in an annular die?

The primary function is to distribute molten polymer evenly around the die circumference, ensuring uniform wall thickness and consistent product quality in extruded items like pipes.

How do spiral grooves affect extrusion pressure?

They help balance and reduce pressure variations by creating multiple flow paths, which minimizes defects such as weld lines and improves processing stability.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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.