First, the concept of carding
Carding is the use of a flat or roller card, with the help of needle surface movement, the small cotton card is combed into a single fiber state, further remove impurities and non-spun short fibers, so that the fibers are parallel stretched, and finally made sliver Into the canister.
Because the fibers in the cotton lap or loose cotton are mostly in loose cotton and cotton bundles after being processed by the open-cleaning machine, and contain 40% to 50% of impurities, most of which are fine, highly viscous fibers. Impurities (such as fiber-breaking seeds, seed swarf, soft-seed epidermis, nep, etc.), so it is necessary to completely break down the fiber bundles into individual fibers, remove the small impurities that remain in them, and make the fibers of each blended fiber in single fibers. The state is fully mixed and made into a uniform sliver to meet the requirements of the subsequent process.
Second, the role of carding process:
(1) The combing is performed on the premise of minimizing the damage to the fibers, and the feeding cotton is subjected to careful and thorough carding so that the bundle fibers are separated into single fibers.
(2) The impurities are completely removed on the basis of thorough separation of the fibers.
(3) Uniformly mixing fibers in a single fiber state and mixing them well.
(D) into a strip made of a certain standard and quality requirements of uniform sliver and regularly placed in the sliver tube.
Third, the task of carding process:
(a) Carding Cotton or cotton bundles are carefully combed to substantially separate into single fibers.
(2) The impurity removal continues to remove the fine fibers with strong fibers or adhesion remaining in the lap or cotton stream, and the impurity content in the sliver is reduced to about 0.1%.
(3) Uniformly mix the functions of “suction†and “discharge†of the Clothing of the carding machine to achieve uniformity and mixing under the state of single fiber.
(d) Strips made of slivers that meet certain specifications and weight requirements are regularly placed in sliver tubes.
Fourth, process flow and role:
(a), to cotton and the part of the licker.
The main function of the cotton feeding and the licker-in section is to feed the cotton layer into the machine, hold the cotton layer, and remove impurities and short fibers.
The effect of the grip on the part of the cotton to the cotton directly affects the carding effect of the licker-in roller, thus requiring firm gripping, uniform gripping in the lateral direction, and proper gripping force. Otherwise, it will cause the uneven detangling of the licker-in roll in the horizontal direction, and the quality of the combing of the cotton layer where the gripping is not stable is poor, and the cotton bundle cannot be fully decomposed.
The slitting roller part of the slitting roller function. The main function of the licker-in section is to puncture and comb the cotton layer using the surface serrations and the serrations on the surface of the combing board to separate the impurities and short fibers. The quality of the combing quality directly affects the combing quality of the cylinder cover sheet, and is closely related to the number of neat pellets, the evenness of the strips, and the degree of damage to the fibers. The factors that affect the splitting effect of the licker-in section include: the speed of the licker-in, the process of the cotton feeding board, the saw-tooth saw-tooth specification, and the process of the combing board.
(b), cylinders, covers and doffers.
The parts of the cylinder, cover and doffer mainly consist of cylinders, revolving flats, front and rear fixed covers, doffers, front and rear cover panels, and large bottoms. The fibers that had been preliminarily combed by the licker-in roll were further carefully combed between the lids of the cylinder to remove some of the finer magazines and short fibers. The doffer condensed the fibers of the cylinder-covered card into fibers and the fibers were split. Uniform and mixed effects are achieved during the coagulation process.
(c) stripping cotton and the circle section.
The function of the stripping device is to strip the fibrous layer condensed on the surface of the doffer.
The function of the coil device is to take the sliver output from the large pressure roller, pull it through a small roller and press it tightly, and then put the coiler ring inside the can.
(D), clothing.
The cylinders of the carding machine, the cover plate and the surface of the doffer are coated with different specifications of the needle teeth. This type of covering is called the clothing. In order to ensure good carding, impurity removal and uniform action, the clothing should have the following properties: 1. Good puncture ability and certain holding ability. 2, good transfer ability. 3, a good ability to absorb and release fiber. 4, the needle teeth should be sharp, smooth, wear-resistant, needle surface to be flat.
(5) The relationship between carding machines and carding quality
The task of the carding process is accomplished by a carding machine. The degree to which the cotton bundles are separated into single fibers on the carding machine is closely related to the strength and the strength of the yarns; the effect of the removal of impurities is determined to a great extent Yarn neps and impurities; Carding machine in the carding system, the single most of the cotton out of the single, and the cotton contains a certain amount of spun fiber, so carding machine the number and quality of cotton directly with the use of The amount of cotton is relevant.
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