Woven fabrics are produced by two series of yarns. This is Weaving Preparatory Process the vertical that is length wise yarns are called warp yarns & the width wise yarns of fabric are called weft yarns. The warp yams are also called ends & the west yarns are called picks. The warp & weft yarns are bound together by their interlacement & woven fabric is produced in the weaving machine which is called loom. To produce woven fabric, the warp & weft yarns require reprocess. The step wise systematic weaving preparatory process is briefly described below In the weaving mill, raw material is yarn, which is collected in cone form. Each cone is roughly 2 kg weight. For weft yarn, these cones may be fed directly in the weaving machine where shuttle is not used. If shuttle is used for weft yarn insertion then beam winding is essential from those cones. For warp yarns, we need to produce pre – beam which is also called warpers beam. To produce warpers beam, we need warping machine with a creel capacity about 400-700 cone capacity. To produce a weavers beam we need 6 to 12 warpers beam. Number of cones to be set in the creel depends on production planning.
Weaving Preparatory Process for beam
To produce weavers beam, 6 to 12 pre- beams are arranged in the feed side of the sizing machine. If a fabric requires 6000 warp yarns and pre- beam produced from 500 warp yarns, then 12 pre – beam will be required to feed, in the feed side of sizing machine. Weaving Preparatory Process warp yarns from 12 pre – beams combined together before the sizing box & the sheet like warp yarns passes through the sizing box. Size materials about 10% on the weight of warp yarns are applied. This percentage of size take-up could be controlled. Then the wet warp yarns passes around 7 to 9 steam heated drying cylinders. When the warp yarns leaves the steam heated drying cylinders, the sized yarn becomes perfectly dry. The sized dry yarns are wound on a beam called weavers beam. One beam can wound 1000 to 3000 yards length of warp yarns. Weaving Preparatory Process the main object of applying size materials on warp yarns is to increase the strength & reduce the hairyness of the yarns. Sizing is an essential operation for woven fabric production.
The weaver’s beam needs some few operations before placing the beam in the loom. The warp yarns are passed through heald eve of the heald wires according to design of the fabric. Number of heald frames may be 2, 3 or 4 numbers. Then the warp yarns are passed through the dents of the reed at a regular pattern. Then the yarns are wond on the fabric beam.