Technologies for cotton spinning
The spinning systems
The Italian textile machinery industry can offer a complete range of machines for the spinning of cotton and of man-made fibre in cotton staple length.
Chart 1 shows the spinning systems which are used for converting the fibre into yarn.
Chart 1 - Spinning systems using Italian machinery
The insertion of electronic systems for controlling the various movements, as well as the use of pneumatic and hydraulic devices and of data processing systems permitted not only to enhance performances, but also to obtain flexibility in spinning and the on-line control of product quality consistency.
The installation of automation systems on board the machine and the linkages among the various machines enable to reduce the attendance by the operator.
Besides we point out that the personnel in charge has taken up mainly a function of supervision and of control, while dropping progressively the heaviest and most exacting tasks.
Spinning preparation
The laying out of a spinning preparatory line shall take following targets into account:
· minimization of the residual impurities in the fibres
· most intensive mixing of the fibres
· lowest discard of good fibres
· maximum flexibility
This is in fact a continuous process, from the fibre bale up to the card sliver contained in the cans, which later on are carried to the drawing frames.
The factor which became of the utmost importance is the flexibility of the process, which permits blends of up to 4 different types of fibre in percentages ranging from 2% to 98%.
