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Saturday, 9 January 2010

Weaving operation

Fabric Construction
Textiles are important for everyone. It is used for covering body, for warmth or coolness, personality enhancement and sometimes to display one's status in the society. From the wholesale textile manufacturer and merchant to the retailer and the end- user, the customer, everyone consumes textile. Not only those who are in this direct trade are related to this product but there are certain industries which are indirectly associated with textile. Automobile industry is a good example of this type of industry which uses textile in various forms. Others who use textile in one or the other form may include designers, interior decorators, craftspersons, advertisers using hoardings and banners, painters etc


Weaving operations
Four major operations are involved in weaving- Shedding, Picking, Beating up (Battening) and Taking up and letting off.

Shedding
Each alternate warp yarn is raised to insert the filling yarn into the warp to form a shed.

Picking
As the warp is raised, the filling yarn is inserted through the shed by a carrier device. Different types of looms are used for carrying the filling yarn through the shed- Shuttle loom, shuttle less looms, circular looms etc.

Beating up (Battening)
With each picking operation, the reed pushes or beats each filling yarn against the portion of the fabric that has already been formed. Reed is a comb like structure attached to the looms. It gives the fabric a firm, compact construction.

Taking up and letting off
With each shedding,Picking, Battening operation, the new fabric must be wound on the cloth beam which is called 'taking up'. At the same time, the warp yarns must be released from the warp beam which is called l 'letting off'.

As the shuttle moves back and forth across the width of the shed, a self edge is woven which is called selvage or selvedge. The selvage prevents the fabric from muddling. It is usually more compact and strong than the rest of the fabric. There are different kinds of selvages depending upon the expected use of the fabric- Plain Selvages, Tape Selvages, Split Selvages, Fused Selvages, Leno Selvages and Tucked Selvages.

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