JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• 1. To learn the basic principles of Warp and Weft Winding
• 2. To understand the role of Tensioners and Yarn clearers in Winding
• 3. To learn about the process of Winding, Warping and Sizing
• 4. To learn about the selection of Size recipe for sizing of different fibres
• 5. To learn about the loom and its primary motions

Course Outcomes

(Graduate to have)

• 1. An ability to decide the suitable yarn preparation system based on the supply and end packages
• 2. An ability to select the tensioning and yarn clearing levels for processing a specific fibre /yarn
• 3. An ability to detect the package defects
• 4. An ability to plan for a size recipe for a specific set
• 5. An ability to test the wound package, warp beam, pirn and sized yarn for required parameters
• 6. An ability to adjust and set the timings and setting of primary motions in a loom for weaving a sort.

UNIT - I

Yarn Preparatory – Introduction, systems of yarn preparation – classification of winding machines – principles of warp winding- study of high speed and super speed cone winding machines – special features such as splicing, auto doffing, electronic slub catcher, ribbon breaker etc., - special features of Schalphrost Auto corner, production calculations – winding faults and remedies.-Quality Control Aspects

UNIT - II

Pirn winding: Introduction, systems of Weft Preparation, objectives, spindle and spindless pirn winders, constructional features of super speed pirn winder, bunch building motion, pirn elements, production calculation. Quality Control Aspects – Warping: objectives, classification, planning for patterned warps, calculations, anti-bound let off in beam warping, Working principle of conventional and modern beam warpers, Production calculation in beam and Sectional warping

UNIT - III

Introduction to sizing: Objectives, Types of forms of sizing, different zones, Creel zone: elements, different types of creels, Positive and negative creels, brake system, Lapper formation and recording Wet Zone : Elements and construction of Sow box, controls in sow box , modern sow box, stretch control . Dry Zone : Methods of Drying Concept of drying, Drying efficiency calculation , Stretch Control, Construction of Cylinders Wet splitting

UNIT - IV

Head Stock: Cut mark motion, moisture control , after waxing in sizing – dry splitting – Migratory behavior of warp ends in sizing – ATIRA Method of recoding – Brief note on Beam winding & Beam press – Types of combs – Motion for combs – Sizing faults and remedies – Calculations in sizing – Post sizing operations.

UNIT - V

Weaving: Introduction, Loom Specification, types and classification, loom motions ,comparison of tappet, Dobby and jacquard shedding ,Principles of Shedding : positive and negative tappet shedding, kinds of sheds, heald reversing motions, early and late shedding.- Principles of picking: cone under

Vs over picking, intensity of picking, setting and timing of picking mechanisms, early and late picking, shuttle checking, Picking elements – Beat up: Eccentricity of sley, Significance- loom production problems.

TEXT BOOKS:

• 1. Sizing Methods, Materials and Machines – D.B.Ajgaonkar, Mahajan Publishers, Ahmedabad, 2006
• 2. Introduction to Winding & Warping – M.K. Talukdar, Mahajan publishers, Ahmedabad, 2004

REFERENCE BOOKS:

• 1. Modern Yarn Preparation & Weaving Machinery- ormerod, Butterworths, London,2006
• 2. Conversion of Yarn to Fabric – P.R.Lord & M.H.Mohammed, Marrow Publishers, London, 2008.
• 3. Weaving, Technology, Management – Azagaonker, Sriramulu,Mahajan ,Ahemedabad, 2007