Monday, May 6, 2013

Weaving Basics 01

From now I'll share the weaving basics in this article . I have copied this one from a famous book .
I will try to give it elaborately ......

Warp Beam – The warp beam is located at the back of the loom and is like a giant spool of thread that is threaded through the loom as the warp yarns. Its shown in the figure bellow -

Harnesses – the warp yarns are first threaded through vertical wires called heddles that are held in a frame called a harness. The harness frames go up and down with the cycles of the loom raising and lowering the warp yarns in a specific order. When the cycle of the loom is in process there are
a set of specific yarns that are raised and a specific set of yarns that remain lowered. When the yarns are fully raised and lowered the yarns create a shed in which the weft yarn is passed through.

Shuttle – there are many different ways to pass the weft yarn through the shed, but the traditional method is by shuttle. As the shed is opened the shuttle is sent across the warp yarns with the weft yarn. The shuttle is sent across on one cycle and then back again on the next cycle. More modern weaving machines send weft yarns through the shed by projectiles, rapiers, air (air jet looms), and water (water jet looms) but the basic idea is still the same.

Reed – the warp yarns are then threaded through a reed, which performs two functions. The reed keeps the warp yarns separated and pushes the new weft yarn fully forward up against the last warp yarn to make fabric. The reed has a forward and backward motion after each weft yarn is passed through the shed, pushing each weft yarn into place in the continual making of fabric.
One cycle of weaving would consist of the harnesses lifting (shedding), the weft yarn being passed through the shed (picking), and the reed moving the weft yarn into the newly formed fabric (beating-up) and then returning to its starting position. The next cycle of the loom starts with the harnesses changing position to create a new shed (the weaving pattern determines the sequence of harnesses being raised and lowered).
 

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Hi.... im Omar Faruk. Through this blog i would like to share anything related textiles ...........