Shed Weaving in Loom | Tappet, Dobby, Jacquard Shedding

Definition of Weaving Shedding:

It is the process by which the warp threads are divided into two layer parts, are above the other, for the passage of the shuttle with a pick of weft. Shed weaving is done due to passing the weft yarn over the warp yarn on the slay race of a weaving loom.

Why Shedding Is Required In Weaving?

You know, in weaving there are three procedures is followed to weave a cloth. At first the warp yarn is separated in two layers. And a shed is created where shuttle is passed by taking the weft yarn. and at last the reed press the last yarn into cloth. This whole matter is called shedding and without it weaving is not possible at all.
Sometimes some modern weaving loom doesn’t need all the three shedding procedures to followed like Air Jet Weaving Process or Water Jet Weaving process. But in traditional Cotton and Jute Mills; we still observe that this Shedding in Weaving Loom is continued.

Classification of Shedding:

Shedding are basically classified in 3 steps. These are Tappet Shedding, Dobby Shedding and Jacquard Shedding.
1. Tappet Shedding. –
a) Positive shedding,
b) Negative Shedding.
2. Dobby Shedding.-
a) Positive dobby shedding,
b) Negative dobby shedding.
3. Jacquard Shedding. –
a) Single lift single cylinder jacquard
b) Single lift double cylinder.
c) Double lift single cylinder.
d) Double lift double cylinder.

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