Yarn Manufacturing Techniques - III
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Follow on Instagram for UpdatesYarn Manufacturing Techniques - III Syllabus — Unit-wise Content
The official GTU curriculum for Yarn Manufacturing Techniques - III (subject code BE05029011) as prescribed for Textile Tech. · Semester 5 divides the course into 7 units, covering 63 listed topics. The unit-wise breakdown below is read from the GTU syllabus document for this subject code, so you can check what the course actually covers before deciding which papers to attempt.
Download the official syllabus PDF (BE05029011)Unit 1 Ring frame - objectives and functions; Creel, Drafting system, design of
- bottom and top rollers
- cot hardness and its effect on yarn quality
- Principles of ring twisting
- design aspects of spindles
- spindle drive
- rings and travellers Function and importance of ring and traveller
- Technical specifications of Ring and Traveller
Unit 2 Thread Guide Devices
- Functions and importance of thread guide devices including lappet guide
- balloon control ring, and balloon separators
- Cop Build-up: Cop shape
- winding process
- winding mechanism
- base formation of cop, and motor-powered cop formation
- Doffing: Preparation for doffing
- manual doffing, and automatic doffing
- Auxiliary Equipment: Fibre extraction or waste collection system
- blowers, and suction systems
- Spinning geometry
- spinning triangle
- twist and tension variation during cop build
- expression of yarn tension
- End Breaks in Ring Spinning: Factors affecting end breaks
- Modern developments in ring spinning
- Calculations: Production and twist calculations
Unit 3 Rotor spinning
- mechanism of twist insertion by rotors
- opening zone
- transport duct
- design features of rotor grooves
- navel, and doffing tubes, and their influence on yarn properties
- concept of back doubling
- calculation of back doubling and twist per unit length
- fibre flux in different regions of the rotor spinning machine
- role of wrapper and bridging fibres
Unit 4 Yarn formation using air-jets, raw material requirements, design features
- of air-jet nozzles
- twist distribution, and air-vortex spinning
- Friction spinning system
- DREF-II and DREF-III systems
- core-sheath yarn structure
- twisting using friction drums
- mechanism of yarn formation, and friction ratio
- limitations of the friction spinning system
- fundamentals of wrap spinning
Unit 5 Other Unconventional Spinning Techniques – Introduction to wrap
- cover spinning
- Bobtex Spinning
- SIRO spinning
- Self- twist spinning
- Twistless spinning
- Electrostatic spinning
- Core spinning
- solo spun yarn manufacture etc
- Requirements of raw materials
- principles of operation and properties of yarns produced from these spinning systems
- Some of the important advantages and limitations of these spinning systems
Unit 6 Doubling
- Objectives of doubled or folded yarn
- conventional ring doubling machine, and twist directions used for ply yarns (S on Z, Z on S, Z on Z, S on S) with examples of yarn products
- Two-for-One Twister Program Name: Engineering Level: UG Branch: Textile Technology Subject Code: BE05029011 Subject Name: Yarn Manufacturing Techniques-III (TFO): Principle of TFO, yarn passage
- special features, and advantages over ring doubling
- Fancy Yarn: Definition
- Production of Fancy Yarn: Methods of producing Knop
- Slub, and Gimp yarns
Unit 7 Value-Added Yarns on Ring Frame
- Compact spinning attachments for fibre triangle reduction
- servo-driven slub attachments for controlled yarn irregularities
- core-spinning devices for stretch and high-tenacity yarns, and Siro-spinning setups for multi-component blending
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