CARDING SECTION Carding Section: Carding is a process in which fibres are opened (almost to single fibre staple), parallelised and removes dust, impurities, neps, short fibres to produce a continuous strand of fibres called sliver of uniform weight per unit length. Objects of Carding: Carding is one of the most important operations in the spinning process as it directly determines the final features of the yarn, above all as far as the content of neps and husks are concerned. There are many objectives of the carding process and these can be summarized as: Individualization of the cotton fibre at a single fibre staple state i.e. opening the tufts into individual fibres; Elimination of the remaining impurities i.e. eliminating all the impurities contained in the fibre that were not eliminated in the previous cleaning operations; Disentangling of neps i.e. removal of neps; Selecting the fibres on the basis of length, removing the shortest ones; Fibre...
Blow room Section : Basic operation in the Blow-room: Opening the cotton bale Homogeneously mixed or blended tufts Clean fibre tufts Convert fibre tufts into a fibrous sheet, is called lap. Objects of Blow-room : The basic purpose of blow-room line is to supply following qualities of fibre tufts to the carding process. Small fibre tufts Homogeneously mixed or blended tufts Clean fibre tufts Convert fibre tufts into a fibrous sheet, is called lap. Blending: The method of mixing different fibres within a specific ratio is known as blending. Mixing: The method of combining identical fibres in various grade of different ratio is known as mixing. Conventional Blowroom line: There are different types of conventional blow-room line. It differs manufacturer to manufacturer. For example a typical blow-room line as follows: Hopper bale opener Ultra cl...
DOUBLING AND DRAWING Doubling and Drawing : In preparing the fiber 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 fibers (through drawing) as well as the count requested by the spinning plan. The drawing operation done with the machine called the draw frame, permits a homogeneous blend both with fibers of the same nature as well as fibers with a different nature; the doubling steps are usually between four and eight. On a par with fiber characteristics such as length and fineness, a sliver with parallel fibers permits a yarn with better regularity and resistance. The drawing depends on some factors such as the number of doubling carried out and the value of the count of the entry sliver and delivery sliver. With drawing, curls, crimps and hooks are also eliminated, meaning the fibers folded in o...
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