Fabric Manufacturing-II

Various methods of fabric manufacture: - Weaving, knitting, braiding, non-woven, brief description of all methods and processes involved in it, Different kinds of fabrics: Grey, mono-colour, multi-colour, warp or weft stripes, checks etc. General description of plain power looms, introduction to weaving process, primary, secondary and auxiliary motion of plain power looms, Various ways of shedding, over and under pick motion, tappet shedding, Temples and its utility, idea about heald count and reed count in different systems, Negative and positive take up motion, negative five wheel and seven wheel take up motion and positive let-off motions.

Scope & limitation of dobby, types of Dobby and their principle of working, negative and positive dobby, brief description of cross border dobby, method of pegging for dobby, heald reversing motion. Latest Developments in dobby.Warp protective devices, side and center weft fork motion

Jacquards shedding, types of jacquards and their principle of working, size and figuring capacity of jacquard, cross border jacquards. Single lift single cylinder Jacquard, Double lift single cylinder, Double lift double cylinder, split harness, Different system of harness tie- up, Card cutting & Lacing, Recent developments in jacquard weaving.

• Objectives for developing automatic loom, scope for automation, design features of automatic loom, loom motions, accessories and other critical features of automatic looms, weft feelers-construction & working of side sweep, electrical & electronic weft feelers, their merits, demerits & applications.
• Automatic let-off motion: Principles and requirements of automatic let-off mechanism, types of Automatic loom: pirn change, shuttle change loom, detailed study of various motions of automatic looms, warp stop motion- types, construction and working of mechanical & electrical warp stop motion, centre weft fork motion; and its advantages.
• Construction & working of Multiple box motion, their types, two colour and four-colour drop box motion, brief description of pick-at will, pick and pick motion. Principal of operation of terry mechanism, Pick finding, heald leveling, light indicators; pick counters need, functions & use, Auto-loom fabric defects- causes and remedies

Calculations related to weaving- Reed & heald count calculation, Production and efficiency of looms, requirement of Warp and Weft weight calculation, GLM, GSM, Cover factor, Fabric sett calculation