Overview
ISO 21485:2013 is an international standard developed by ISO that defines the vocabulary and principles of construction for draw frames used in cotton spinning textile machinery. This standard provides uniform terminology and fundamental design concepts related to draw frames and their components, ensuring consistency and clarity in the textile industry. It addresses the critical machinery used in cotton spinning, focusing on the delivery and drafting systems essential for fiber processing.
Key Topics
- Vocabulary for Draw Frames: ISO 21485:2013 establishes standardized terms for the various parts and functions of draw frames, such as sliver cans, creels, drafting systems, draft and doubling, delivery units, and cleaning devices.
- Principles of Construction: The document outlines key construction elements including the drive mechanisms (main and variable speed drives), roller types (fluted, knurled, smooth), pressure systems (spring-loaded or pneumatic), and stop motions (mechanical or electrical).
- Drafting and Doubling: Defines drafting as the attenuation of fiber slivers through progressively faster rollers, and doubling as the process of feeding multiple slivers simultaneously to ensure even mass and fiber alignment. Autoleveller draw frames, incorporating devices to compensate sliver mass variation, are also described.
- Machine Dimensions and Sides: Provides standardized identification of machine sides (left and right) relative to fiber flow and important spatial dimensions relevant for installation and operation.
Applications
ISO 21485:2013 applies primarily to the design, manufacturing, operation, and maintenance of draw frames in cotton spinning processes within the textile industry. Its practical applications include:
- Manufacturer Reference: Ensuring that machine designers and manufacturers use common terminology and construction principles, fostering compatibility and quality assurance.
- Technical Training and Documentation: Serving as a reliable source for technical writers and trainers developing educational materials, manuals, and operational guidelines for textile machinery.
- Quality Control and Innovation: Helping engineers and quality managers understand standard components and functions, enabling improved machine performance, troubleshooting, and innovation with new technologies in fiber processing.
- International Trade Compliance: Facilitating clearer communication and conformity assessment internationally, supporting trade and regulatory adherence across textile machinery markets.
Related Standards
- ISO 92 - Defines left and right sides of textile machinery, relevant for standardized machine orientation terminology.
- ISO 93-1 & ISO 93-2 - Specifications for cylindrical sliver cans used for sliver collection, referenced for sliver can dimensions in ISO 21485.
- ISO 16853 - Covers rectangular sliver cans dimensions and tolerances, important for machine compatibility.
- ISO 2205 - Terminology for drafting arrangements in spinning machines, supporting detailed understanding of drafting components.
By applying the vocabulary and construction principles from ISO 21485:2013, textile engineers and manufacturers can ensure high-quality, consistent draw frame production and operation, contributing to enhanced cotton spinning efficiency and uniformity. This standard is essential for anyone engaged in textile machinery design, production, or maintenance, emphasizing practical utility and industry-wide communication.
Open preview (PDF)Textile machinery — Draw frame for cotton spinning — Vocabulary and principles of construction