Blow Room

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.

The whole machine is subject to suction and the dust is collected in special filters; the material, on the other hand, undergoing contemporaneously, the rotary action of the cylinder and suction along the operating width, effects a helical movement around the drum and exits from the side opposite to that on which it entered. It is then transferred by the delivery hopper into the transportation conduit.

1. BLENDING

STEPS:          Cotton is passed from bales and then to apron. Apron moves cotton to blending apron. Blending apron has sharp spikes the raise cotton until part of it is knocked off by the roll. Some of the cotton stays on apron. The cotton knocked back by roll and continues to chum and blend until picked up again by apron. Another roll strips off cotton that was not knocked back by previous roll. Cotton falls on conveyor belt and is carried to next process.

WHY IT’S BEEN DONE:It is necessary so as to obtain uniformity of fiber quality.

 2. OPENING

 STEPS:Lint cotton falls on apron and passes between feeder rolls to beater cylinder. The rapidly whirling beater blades take off small tufts of cotton, knock out trash, and loosen up the mass. The two screen rolls are made of screen material and air is sucked out of them by fan. This draws the cotton from beater and condenses it on the surface of the screen rolls from which it is taken and passed on by the small rolls. Air suction through cotton takes out dirt and trash. Conveyor belt passes cotton to another type of beater. From beater the cotton passes to a conveyor and is carried to picker.

WHY IT’S BEEN DONE:It is necessary in order to loosen hard lumps of fiber and disentangle them; cleaning is required to remove trash such as dirt, leaves, burrs, and any remaining seeds.