The Knitting Action of the Circular Rib Machine

Rib has a vertical cord appearance. It is more expensive fabric to produce than plain fabric. Structure of rib fabric is heavier. To produce rib fabric rib circular knitting machine is widely used.

In rib circular knitting machine group there is one set of needles on the circumference of a vertical cylinder and a second set of needles, arranged perpendicular to the first set and mounted on a horizontal dial. On most of the circular knitting machines the cylinder and dial rotate, whereas the cams with yarn feeder guides are stationary.

In this article I will explain knitting action of rib circular knitting machine.

Knitting action of the rib circular knitting machine:

The knitting action of a circular rib machine consists of three action. There are :

(a) Clearing
(b) Yarn Feeding
(c) Knocking-over

knitting action of a circular rib machine
Fig: Diagram of knitting action of a circular rib machine
(a) Clearing:
The cylinder and dial needles move out to clear the plain and rib loops formed in the previous cycle.

(b) Yarn Feeding:
The needles are withdrawn into their tricks so that the old loops are covered by the open latches and the new yarn is fed into the open hooks.

(c) Knocking-over:
The needles are withdrawn into their tricks so that the old loops are cast off and the new loops are drawn through them. In a gauge range from 5 to 20 npi, an approximately suitable count may be obtained using the formula NeB = G2/8.4, where NeB = cotton count and G = gauge in npi. For underwear fabric, a popular gauge is E 14 with a count of 1/30’s.

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Mazharul Islam Kiron is a textile consultant and researcher on online business promotion. He is working with one European textile machinery company as a country agent. He is also a contributor of Wikipedia.

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