When the automatic winder joint is used, the jointer uses compressed air to untwist the upper and lower yarn ends and twist them together to form a high-quality knotless yarn, which overcomes the large joints formed by traditional knotting methods. Easy to fall off, affect the appearance of the fabric and other shortcomings, to create the conditions for improving the weaving efficiency and product quality. Found in actual production, the splicer air pressure, splicing time and splicing length and other process parameters are the key to ensure joint quality. If the air pressure is insufficient, the splicing strength is too low, the air pressure is too high, the yarn is easily blown into details, and the strength is also affected; if the spliced ​​length is too Short, the strength of the joint is weak or the splicer is not able to spliced. Otherwise, the yarn ends are exposed at both ends of the joint. , affect the uniformity of the yarn and the appearance of the fabric. Characteristics of semi-worsted yarns Semi-worsted yarns began with a large number of wool products. Now its products are not only wool spinning, but have been developed into the production of fiber blended yarns with multiple components such as cotton, silk, and hemp. Product features include: variety of varieties, raw material composition, and most of the fiber dyed, the performance of raw materials vary widely; yarn twist is generally larger than the same number of cotton yarns, combed yarns are larger, and some products are Strong twisted yarn, difficulty in retreat; after dyeing of raw materials, most of the strength of single fiber is damaged to varying degrees, and when the carding is performed, short fibers will be produced, resulting in frequent yarn defects and high shear rate. The joints are numerous; the appearance of the yarn is strong and the appearance of the customer is strong, and the appearance requirements are very high (such as silk cashmere), especially the joints of some single yarns of high-speed circular knitting machines are particularly prominent. The use of an automatic winder to produce semi-worsted yarns can easily cause defects in rifling and problems with the internal quality of the package. The control of the yarn return rate of the semi-worsted yarn cannot be ignored. Therefore, the key to producing semi-worsted yarns using an automatic winder is to solve the three major problems of joint appearance, strength, multiple bobbin turns, and yarn return rate control. Responsive measures to deal with poor quality The poor appearance of the knot shows mainly the hairiness at both ends of the knot, and the joint is too thick or too thin. The low knot strength is mainly due to unsuitable parameter adjustments such as retreat pressure and twisting time. At the same time, when these parameters are adjusted unfavorably, the appearance quality of knots is also affected. Process parameter optimization The process varies with the type of production, and the process parameters of the electronic yarn clearer and air splicer also change. Reasonable selection of winding speed The winding speed in production can be selected according to yarn number, variety, and yarn quality. The choice of twisting pressure and twisting time The size of the twisting air pressure and the length of the twisting time directly affect the appearance and strength of the twisted knot head. In order to ensure the strength of the twisted yarn, it is necessary to carry out repeated debugging on the length of the twisting pressure and twisting time. While the conventional twisting time on the automatic winder is only suitable for conventional twisting yarns, the multi-component blended semi-worsted yarn should increase the twisting time of the joint to increase the tightness of the fibers at the knot end. The length of the twisting time is controlled by the position of the cam and its follower bolt. By turning the cam back half-dimension and adjusting the position of the follower rod bolt, the knotting effect is better. Knot length adjustment The regularity of the fibers is the main factor that determines the length of the knots. In the actual production, adjustments are made according to the combination properties of the raw materials of the varieties, so that the appearance quality of the knots can reach an ideal state. Main measures taken to improve the intrinsic quality of the package The intrinsic quality problems of the package include biting head, tweezers, and wiping, which are mainly caused by hair tangling, yarn retraction after twisting, twisting, and repeated sucking by large suction nozzles. The most fundamental reason is the large difference in twist degree. The degree of stability is poor. The following measures can be taken for this purpose: Reasonably select winding speed and tension The dyed fiber is easy to produce static electricity in the production process, the higher the winding speed, the higher the static electricity, the more serious the damage of the yarn's strength, strips, etc. The longer the yarn hairiness, the hairiness tangled, easy to form a bite. In addition, the winding tension is also a major factor that affects the breakage on the car. Therefore, in the actual production, the speed and tension should be adjusted repeatedly to achieve the best state. Stereotype processing In order to reduce the defects in the production process of cheese yarns, the problem of the stability of the yarns should be solved. Can take steam heating heat setting and cocks placed 20 ~ 24h and then take the winding and other measures. For different breeds, using different stereotypes to promote unbalanced tension in the fiber stress tends to balance, in order to stabilize the twist, reduce the shrinkage rate, to prevent unbalanced twists and twists in the windings and produce small discrepancies in the yarn. Kink problem. Control of winding rate The control of the yarn return rate of the automatic winder is of great importance for improving the quality of the semi-worsted yarn. The following methods can be used in the production to reduce yarn return. Choose a reasonable drum reversal speed In the case of ensuring that the sucking nozzle head failure rate is as small as possible, a reasonable groove reversal speed is selected to minimize the amount of suction wire suction. We need to balance the yarn return rate and the error rate of head-searching for different reversal speeds of different types of tanks. Practice has proved that a more effective way to control the yarn return rate to a minimum is to achieve a balance between the reverse speed and the uptake rate. Clean up anti-torsion rod cylinder clip back flowers Regularly clean the anti-torsion rod cylinder clips to ensure that their movements are accurate and in place. Anti-torsion rod cylinder clips will directly cause the anti-torsion rod to move out of position, the yarn yarn head pressure is not tight, the suction nozzle absorbs too much yarn in the process of splicing, and the waste of wire is large. For this reason, the cylinder should be removed periodically to remove the clipped flowers one by one, and lubricate the inner wall of the cylinder with grease to ensure that it works well. In addition, adding a felt pad to the outside of the anti-torque cylinder can effectively reduce the back of the cylinder. Adjust twist-proof brush gauge Twist-proof brush spacing refers to the horizontal distance between the tip of the brush and the lifter of the balloon breaker at the farthest point of the brush. If the distance is too large or too small, the waste of wire waste will increase. Therefore, it should be adjusted repeatedly to make it Reach the best condition. Reasonably configure the process parameters The winder has a strong function of checking and catching defects. Under the premise of guaranteeing quality, the process parameters should be reasonably configured as far as possible so as to improve the operation efficiency of the equipment, reduce the production cost, and save the yarn return. The use of an automatic winder to produce semi-worsted yarns has a significant effect on improving the yarn quality and production efficiency. However, to make good use of its superiority and give full play to its effectiveness, it is necessary to understand the characteristics and production difficulties of various semi-worsted yarns, continuously carry out process tests and technological discussions, and master the operation rules of the equipment. At the same time do a good job of equipment maintenance and standard operation, regular inspections, implementation to the people, assessment in place, in order to give full play to the overall performance of the equipment. 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Automatic Winder for Producing Semi-worsted Yarn Technology
The winding process is an indispensable process in the spinning process. With the healthy development of semi-worsted spinning, and the requirements for a wide range of yarn counts, high grades, and diversified varieties, in the semi-worsted production practice The importance of automatic winder has been paid more and more attention by people, and the advantages of its cost performance have become more and more obvious. This article is based on textile resources. Please direct users to directly input textile resources in the browser.