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During the work of the winding drum, the winding is changed to increase the capacity of the yarn winding: through winding, the pipe yarn (or hank yarn) with less capacity is connected to make a larger capacity of bobbin.The capacity of one bobbin is equivalent to more than 20 pipe yarns.Bobbins can be used for warp warping, twisting, weft rolling, dyeing, filling on shuttle-less looms and knitting yarns. If pipe yarn is directly used in these processes, it will cause too much downtime, affect the improvement of production efficiency, and also affect the improvement of product quality. Therefore, increasing the winding capacity is a necessary condition to improve the productivity and quality of the later process. Eliminate the defects on the yarn and improve the yarn quality: There are some defects and impurities on the yarn produced by cotton mills, such as knobs, details, double yarn, weak twist yarn and cotton knobs,etc. When winding the yarn, the yarn cleaning device is used to check the yarn, remove the defects and impurities that affect the quality of the fabric on the yarn, improve the uniformity and smoothness of the yarn, so as to reduce the breakage of the yarn in the last process and improve the appearance quality of the fabric. It is most reasonable to remove yarn defects and impurities during the winding process, because each bobbin is working independently during the winding process, and while one bobbin is handling the breakage, the other bobbin can continue to work without being affected.

Winders are mainly divided into ordinary winders and automatic winders. The common winder is characterized by simple structure, low price, easy operation, convenient maintenance and management, low power consumption, less yarn return, and is more practical, but the quality of the winding is poor and the production efficiency is low. The automatic winding machine is applicable to the winding process of cotton, wool, fiber, pure spinning and blended spinning, and could produces high-quality knotless yarn. It has the advantages of high efficiency, high speed, high quality, stability, easy maintenance and excellent performance. It is the latest generation of textile machinery products with a high level of integration of machine, electricity, instrument and gas.

Winding is the first process of preparation before weaving. Its task is to process the pipe yarn or hank yarn from the spinning part into a cone that meets certain requirements on the winding machine. The functions of winding process can be summarized as the following two points: (1) the original yarn (or filament) is made into a bobbin with a capacity of trap, which is provided for warp warping, weft rolling, knitting, weft supply or dyeing of shuttle-less looms. In terms of pipe yarn capacity, the pipe yarn packed in large rolls can only hold about 2500m of 29.2 Tex (20 English count) cotton yarn. If the pipe yarn is directly used in warping or weft feeding on the loom, the stopping time will be too long due to frequent tube change, which is not in line with the technical requirements, and is not conducive to improve the production efficiency.The winding capacity of the bobbin is greatly increased. Generally, the winding length of the bobbin can reach about 100,000 meters. (2) It can remove some defects on the yarn, and improve yarn quality.The original yarn transported from the textile mill generally has many appearance defects. When passing through the yarn cleaning device on the winder, the lint, dust, weak yarn, coarse knot and other impurity defects on the yarn can be removed. In this way, the appearance quality of the fabric can be improved, and the average strength of the yarn can be increased because the weak links on the yarn are removed, thereby reducing the breakage of the yarn in the subsequent process.

Winding is the first process of preparation before weaving. The pipe yarn, hank yarn or bobbin yarn in the pre-spinning is wound into a certain size bobbin on the winding machine, which is provided for knitting, weaving, warping, weft rolling or dyeing processes. After the winding process, the yarn is wound into a certain form of large winding, which avoids the frequent tube change in the later process, and also further eliminates the impurities, cotton knotting, large ends, thick and thin knots and other defects on the yarn, which improves the production efficiency, the quality of the cone yarn and the weaving performance.

How many types of winding machines are there? It is mainly divided into loose winder and tight winder. The loose winding machine is a groove drum winding machine for winding loose bobbins. A larger yarn winding Angle (such as 55°) is used, and a winding tension decreasing device and winding pressure decreasing device are equipped, so that the winding density of the bobbin is reduced and the inner and outer layers are uniform. Loose bobbins are used for bobbin dyeing. The simple tubes are made of light metal with many holes in the wall. There are also spring bobbins made of stainless steel wire to facilitate the dyeing liquid to penetrate the yarn layer through the tube wall and ensure uniform dyeing inside and outside the bobbin.Each spindle of the compact winding machine is driven separately by a motor, equipped with a set of automatic joint device. In addition, this type of machine is also equipped with advanced electronic yarn cleaner, air splicer or mechanical splicer, electronic length fixing device, anti-stack device, metal groove cylinder, horizontal spring pressure tension device without column core, waxing device, air ring control device, circuit blowing cleaning device, etc., to ensure the excellent quality of the cylinder. According to the degree of automation of winding operation, it is divided into semi-automatic winding machine and automatic winding machine and fine cylinder combined machine.The semi-automatic winder can only complete the winding of the bobbin, the automatic stop of the broken ends and the yarn cleaning and defect removal.The fine cylinder combined machine connects the spinning frame and the automatic winding machine with the manipulator and the automatic transport line, shortens the working procedure, reduces the manpower, and is beneficial to the production management and the product quality improvement.