Overview
ISO 20726:2004 - Textile machinery - Hopper feeders for cotton spinning - Vocabulary and principles of construction - defines a standardized vocabulary and the basic principles for designing hopper feeders used in cotton spinning. The standard establishes clear terms in English and French (official ISO languages) and provides equivalent German terms (published by DIN). It is intended to harmonize terminology, describe core components, and give construction principles to support design, manufacture, procurement and training in the textile industry.
Key topics and requirements
- Scope: Establishes vocabulary of terms and principles of construction for hopper feeders used in cotton spinning.
- Defined components: Clear definitions for major parts such as feed table, feed lattice, spiked lattice, evener device (evener roll or evener lattice), cleaning roll, stripper roll, light barrier (filling level control) and suction pipe (dust extraction).
- Machine orientation & dimensions: Standardizes terms for right side / left side, machine length, feed table length, machine width, and inner frame (nominal) width to ensure consistent dimensional references.
- Construction principles (Annex A):
- Nominal width corresponds to inner frame width.
- Feeding is by feed table or condensers (condensers referenced to ISO 20725).
- Delivery to downstream machines can be by conveyor belt or by suction.
- Special designs (example: weighing hopper feeders) are acknowledged for precise dosing of fibre blends.
- Illustrative examples: Figures and indexes present layouts, component keys and symbols for consistent interpretation.
Practical applications and users
Who benefits from ISO 20726:
- Machine designers and manufacturers - for consistent terminology and guidance on basic construction elements and layouts.
- Procurement and specifications teams - to write clear purchase specifications and acceptance criteria for hopper feeders.
- Plant engineers and maintenance staff - to understand component names, functions and integration points (e.g., suction, feeding, discharge).
- Standards committees and educators - for training materials, instruction booklets and cross‑border communication.
- Technical writers and documentation teams - to ensure manuals use harmonized vocabulary.
Practical uses:
- Drafting contractual technical specifications for hopper feeders.
- Aligning production drawings and spare‑parts lists with standardized terms.
- Integrating hopper feeders into cotton spinning lines (feed/ delivery interfaces).
- Training operators on component functions and safety-relevant parts (e.g., guards, light barriers).
Related standards
- ISO 20725 - Textile machinery - Condensers for cotton spinning - vocabulary and principles of construction (referenced for condenser feeding).
- Note: ISO 20726 provides terminology that complements other textile‑machinery standards managed by ISO/TC 72.
Keywords: ISO 20726, hopper feeders, cotton spinning, textile machinery, vocabulary, principles of construction, feed table, spiked lattice, evener roll, weighing hopper feeder.