Weft Knitting

Circular Weft Knitting
Introduction to circular knitting machines and production of interlock and single jersey
  * To investigate the production of interlock and single Jersey fabrics.
  * How to produce fabrics with horizontal and Vertical Stripes
  * Examine different types of yarn feed used on weft Circular knitting machines.
  1. Examine the cam systems of interlock and single jersey Circular knitting machines to produce the fabrics below
  * Horizontal stripes [Single Jersey] examine the variations in width of stripe and how this can be achieved.
  * Vertical stripes {interlock}
  * Small check patterns.
  2. Examine the types of quality control on a weft knitting machines.
  * Negative feed.
  * Positive feed.
  * Assisted feed.
  3. Investigate the stitch length, stitch density [Courses and wales] and yarn measuring devices used in quality control.


Single Jersey: A single jersey fabric can be knitted using a plain circular knitting machine with one needle system , with help of latch needles specifically . This machine can only knit plain knits and hence is called a single   jersey machine.It is called open top circulars since they have a cylinder and no dial i.e only one set of needles. Present day single jersey machines have 12- 60 gauges up to 48 inch diameter.
Production of single jersey fabric on a circular latch needle machine:
According to David J Spencer ,Knitting technology;   The yarn is supplied from cones via a bobbin stand or a   free standing creel it is further passed through tensioners , stop motions and guide eyes down to the yarn feeder guides.
The fabric formed is of tubular from and is drawn downwards with the help of tension rollers inside the needle cylinder it is then wound onto the fabric batching roller.
The winding down motion is in unison with the cylinder and fabric tube.Since the sinker cam plate are placed outside the machine it is referred as open top machine....