Knitting Technology

Basic knitting terms and definitions (course, wale, CPI, WPI, stitch density, loop length), Comparison of weaving and knitting, comparison of warp and weft knitting, Preparation of yarns for weft and warp knitting; Classification of weft knitting machines; Structural Elements of Weft Knitting: Needle loop, sinker loop, technical face, technical back, knit stitch, tuck stitch, purl stitch, miss stitch, needle numbering system

Mechanical elements of weft knitting: needles, and their types (latch needle, bearded needle and compound needle), sinkers, cams, cylinder, jack; knitting action of all needles; Knitting cycle and yarn path of weft knitting; Four basic weft knitting structures- single jersey, rib, purl and interlock (their structures, loop formation, machine construction, fabric characteristics, use and derivatives), Circular weft knitting machines

Flat bed knitting machine: Process of loop formation, cam track, features, and structures produced; Relation between yarn count and machine gauge; Science of Knitting: Concept of loop length, loop length geometry, knitting tension, fabric relaxation and shrinkage, tightness factor, robbing back, spirality, all related numerical

Warp knitting principles: open loop, closed loop, overlap and under lap; Construction of warp knitted fabrics, principle, operation and comparison of Tricot and Raschel machines, mechanism of needle and guide bar movements, Single needle bar structures; Multiple guide bar construction: lock knit, reverse lock knit, satin, sharkskin structures and properties; Swinging and shogging of guide bars

Modern developments in weft and warp knitting machines; calculations regarding production, GSM, stitch density etc of weft and warp knitting; spacer knitted fabrics; causes and remedies of faults in knitted fabrics Grand total of lectures required=36