Blow room is the starting of the spinning operation where the fibre is opened, cleaned, mixed , micro dust removed and evened thus passed to carding machine without increasing fibre rupture, fibre neps , broken seed particles and without removing more good fibres. The basic functions of blow room are opening, cleaning, dust removal, blending and evenly feeding the material on the card.
In total all the trimmings used for the garment cab be substantial cost item and so their selection and use require careful considerations. There is no point in improving materials utilisation if the savings made are thrown away by using expensive tapes as stay tapes. The professional approach is: sufficient for the intended purpose no more.
Carding is a mechanical process that breaks up locks and unorganised clumps of fibre and then aligns the individual fibres so that they are more or less parallel with each other. Carding can also be used to create blends of different fibres or different colours. Carding plays a crucial role in all spinning cycles particularly in the woollen spinning cycle, in which it incorporates different functions, all essential in order to obtain the level of quality required of the product.
Carded Slivers are fed into the Draw-Frame and are stretched/Straightened and made in to a single sliver. Also fibre blending can be done at this stage. The cans that contain the sliver are placed along the draw-frame feeder rack, usually including eight pairs of cylinders (each pair is above the space occupied by a can),the lower cylinder is commanded positively, while the upper one rests on the lower one in order to ensure movement of the relative sliver that runs between the two.
The input of roving frame is silver that comes from draw frame section where only parallel of
comber sliver. In roving section reduce the linear density of draw frame silver by drafting. After
reducing the linear density the silver is transfer into roving (a thin form of rope). This is first
stage where twist is inserted for making a yarn in spinning mill. The output of this section is
roving which is wind on a bobbin and this is suitable for further process. Here in this section
In Lap-former machine, slivers are fed to form a lap of 20 inches wide condensed with a slight draft and weighing as per set length. The machine run smoothly so as not to disturb the fibres which undergo combing at the comber machines. One such Lap former is sufficient to feed 8 comber machines.