Usually the mass of dyed yarn is very small, but the gr […]
Usually the mass of dyed yarn is very small, but the grade and value are very high. However, it is difficult to make use of the materials and wastes in the production of this color number next time, which is basically waste. Therefore, it is necessary to improve the primary production rate in production. In the production of feeding materials, it is necessary to ensure that the number of yarns is sufficiently large, and the use of the reclaimed and reclaimed yarn in the spinning in a timely manner, so that the smaller the amount after production, the better. Starting from the root, work closely with the dyeing factory to enhance the spinnability of the dyed fiber and minimize the amount of recycled and recycled materials. Try to ensure that the equipment is intact, strengthen the operation ability of the blockers, and strive to reduce the return of materials and flowers. Strengthen the recycling efficiency of recycled materials and recycled flowers, and analyze the raw material varieties according to the color mixing ratio. A variety of mixing methods can be used, such as mixing with wool, or combing with cotton and clearing flowers, or combining with separate strips. However, we must first ensure the color, there can not be too many long fragments of chromatic aberration. If necessary, spun and recycled materials are spun in batches.
Pay attention to control twist difference
If the twist spindle difference is too obvious, it will cause some color differences and color files in the clipped colors. The yarn with too high or too low twist on the woven sheet has a significant difference in color and shade. Therefore, only ensuring the healthy operation of the equipment can reduce the twist spindle difference, thereby reducing the color difference and color file.
Pay attention to the influence
If the long thick section, long detail and count deviation are too large, it is easy to cause color difference and color file. Especially for some AB yarns, for example, the former is white and the latter is red. If there are deviations in the thick and thin yarns or the count, the color difference of the finished yarn after double twisting will be very large. Therefore, it is necessary to continuously optimize the spinning technology of different varieties, use equipment in good condition, and improve the evenness of the yarn sliver through test monitoring and operation management, so that the count is not too large.
Optimized control of neps and color points
First, the neps impurities in the raw materials should be considered when configuring the raw materials. The reason is that no matter how good the carding machine is, the maximum efficiency of removing raw material neps is only 90%. There will still be a few color spots on the yarn, so it is necessary to pay attention to the quality of raw materials and the use of excessive colors in the color matching process of the dyeing plant.
Secondly, the proportion of raw materials should be strictly in accordance with customer requirements. Some raw materials are prone to color spots and neps when mixed. The wet hair should be separately lubricated and lubricated, and the static electricity problem should be changed by additives to make it smooth and soft. When lowering the neps, we must try our best to loosen the neps and entangled fibers of the raw materials to make them into single fibers. Finally, correctly handle the relationship between neps, color points, short pile and carding process. Reasonable configuration of carding degree, carding strength and transfer rate, so as to better card the fiber, reduce damage, and make it evenly mixed and effectively transferred. If an error occurs, the quality of the sliver will be affected, and the neps and color points will appear. To remove color spots in spinning, the carding process is critical. Neps can be eliminated or loosened during carding, but the removal effect will be better. Therefore, we should give priority to thinking about how to remove the neps in the raw materials, so as to reduce the combing pressure.
In addition, it is necessary to ensure that the carding process is reasonably optimized to achieve the best condition of the card clothing, and strive to loosen the remaining neps. According to the variety of raw materials to find the reason, take a good balance of carding and transfer, do not let the neps appear again.
The neps appear in the carding because the transfer rate is not high and the return is too much, so that the non-transferred fibers pass through the feeding board and the neps appear due to rubbing; the second is because the free fibers are carded in the cylinder and the cover The area may be rubbed into neps, but poor transfer is the key. The main carding area combs the neps, and the loosened neps become short piles, which have a low transfer rate and may be rubbed into neps. Therefore, the sliver neps, linters and color points are deeply affected by the carding process. The process parameter of the whole machine is the cylinder speed, and the higher speed can better remove the neps, but it will also increase the short pile. Therefore, the process parameters such as cylinder speed and selected partial gauges should be fully considered according to the principle of both mixing and short pile. Through trial and error and operation management, according to the blending of different raw materials, we can grasp the balance point of combing and minimize the neps and color points.
In short, in the production of semi-worsted yarn, we must highly control the color light, color point, color during the production of color spinning, and avoid the color difference and color particles by controlling the proportion of the color spinning components. At the same time, it is also necessary to continuously accumulate experience from the aspects of technical management and production technology, so as to ensure that the color difference control process is more scientific.