This is normally used in cotton carded spinning. The frame is fed with slivers from the drawframes which transform the yarn directly into packages, eliminating the passage on the roving frame and, in many cases, further packaging operations. The figure below represents an example of rotor (or open-end) spinning frame.Fig. More >
The devices on the combing machine are well synchronised with each other and a combing cycle is completed in the time it takes the circular comb to complete one turn. This cycle is divided into three stages:
1) combing of the tuft 2) backward motion of the previous tuft 3) condensing More >
The combing machine is composed of eight combing heads which produce slivers which, later, are doubled four on four by a drawing aggregate of four on top of five cylinders to make two slivers which are taken to the collection cans. Each combing head is More >
The cans that contain the sliver are placed along the drawframe 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 More >
In preparing the fibre tufts for spinning, doubling and drawing represent two essential operations and their combined
effect permits a sliver with a more regular section to be obtained (through doubling) equipped with parallel fibres
(through drawing) as well as the count requested by the spinning plan.
The drawing operation done with the More >
Winding is the creation of large yarn packages that can be easily unwound. This makes using the yarn on subsequent machines both easier and more economical.
In order to form packages of the right weight for subsequent processing stages, the winding machine can be fed by ring-spun yarn bobbins, by packages More >
The combing process is carried out in order to improve the quality of the sliver coming out of the card. The process eliminates short fibres, it achieves better parallelisation of fibres, it straightens curls, and it removes neps and residue impurities. It is clear from these functions More >
As a consequence of the spinning, weaving and knitting of the cotton and short-staple fibre being carded, combed or open-end spun, working of regenerated fibre has sprung up where regenerated fibre is intended as knitting waste, sub-products derived from the spinning cycle (flying fibres), the waste, the scraps from weaving More >
The lap, turned slowly by the conveyor cylinders of the feeder hopper described in the previous pages, is stretched out (Figure 1) onto the feeder table (4), at the end of which is the feeder cylinder (1). The feeder table is made of well polished metal so the fibre is More >