Classification and characteristics of spinning machines
Common slubbing spinning machines are generally divided into three categories: traveling frame spinning frame, traveling spinning frame and ring spinning frame.
Both the carriage spinning frame and the carriage spinning frame are intermittent spinning machines. Ring spinning machine is a continuous spinning machine.
The spinning methods corresponding to these three types of roving spinning machines are somewhat different, and there are also many differences in performance.
According to relevant research, among the three types of spinning machines, the uniformity of the ring spinning machine is relatively lower than the first two, but the spinning efficiency is higher than the other two. Each of these three types of spinning machines has its own merits.
The differences in the spinning yarns of different roving spinning frames are caused by the differences in spinning yarns. The twisting method of the first two is horizontal, with no control zone length, winding without twisting and twisting without winding. The balance of twist is good, so the uniformity is much better, but the drafting zone is too long.
The twisting method of the ring spinning machine is vertical, and the balance time of the twist is short, so its uniformity is poor. Since the non-control zone is short, the problem of end breakage is much smaller.
It is precisely because of the different mechanisms of these tasks that there are differences in the quality and efficiency of their production. For each enterprise, different slubbing spinning machines can only achieve the highest efficiency by selecting them according to their actual production needs.
The structure and working principle of the ring spinning machine are similar to those of the cotton ring spinning machine.
The structure and working principle of spinning machine
The traveling frame spinning machine and the spinning frame are essentially the same. The difference is that when the traveling frame spinning machine is working, the bobbin frame makes a reciprocating motion, while when the traveling frame spinning machine is working, the spindle makes a reciprocating motion. The spinning mechanism of the carriage spinning frame and the ring spinning frame are the same, but their spinning mechanism is different from that of the ring spinning frame. The main difference lies in the way the spinning frame completes the three main processes of drafting, twisting and winding. In the traveling frame and the spinning frame, drafting and twisting are carried out in the horizontal direction, and the twisting and winding processes are not carried out at the same time, that is, twisting is not done during twisting, and twisting is not added during winding. For ring spinning machines, drafting and twisting are basically carried out in the vertical direction, and the three processes of twisting, drafting and winding are carried out at the same time, so its production efficiency is higher.
Carriage spinning frames and spindle spinning frames are transverse and have a long drafting zone where the twist is usually applied via spindles. The spindle axis is almost perpendicular to the roving plane, but slightly tilted forward. During drafting and twisting, the yarn slips off the top of the spindle as the spindle rotates, adding twist to the roving rather than winding the roving onto the cop.
Some believe this flicking action helps redistribute the twist, creating vibrations that are beneficial to drafting. In the first stage of the working cycle, the surface drum transports the roving out of the bobbin frame, and the carriage moves backward at the transport speed. At the same time, the spindle rotates to add a small amount of twist. At the preset point where the carriage moves backward, the conveying roller stops while the carriage continues to move backward. The length of the twisted roving thus begins to be stretched, while twist continues to be added. At the end of the draft, the spindle speed is increased to maximum and the final twist is added. As the carriage returns to the starting point, the yarn is rolled onto the package. During the winding process, the tension bow and the winding bow bind the roving, so that the rotation of the spindle can wind the twisted wool yarn onto the bobbin in a certain shaping manner.
A longer drafting zone on a hand spinning machine will contribute to better drafting, since the longer part allows a wider range of density changes to exist simultaneously in the drafting zone. Since the twist drafting mechanism is a competitive mechanism, long surplus changes can be resolved in a longer draft zone.
In ring spinning, the twisting and winding steps of the yarn are combined. The ring has a lightweight traveler clamped to it, through which the yarn is passed before being wound onto the spindle bobbin. The rotating spun yarn drives the traveler to rotate around the fixed steel ring. Because there is friction between the traveler and the steel ring, the speed of the traveler is slightly slower than the spindle, so that the spun yarn can be wound onto the bobbin. As the speed of the spindle increases, the friction between the traveler and the steel ring increases, the centrifugal force on the yarn also increases, and the tension on the yarn also increases. The traveler weight must be chosen so that the tension produced exceeds the centrifugal force on the yarn at all speeds, otherwise the yarn will not wind properly. If the traveler is too heavy, the tension may frequently exceed the strength of the local yarn at high speeds, and the yarn will break at the thinnest part.
Ring spinning is a continuous spinning process. Therefore, when the spindle speed is consistent, its production efficiency is much higher than that of the carriage spinning frame and the carriage spinning frame. This is because of the differences between the carriage spinning frame and the carriage spinning frame. The spindle only spins part of the time. In wool worsted spinning and cotton spinning, the spinning frame has been completely replaced by the ring spinning frame and some other new spinning equipment, such as rotor spinning machine and air-jet spinning machine. However, the spinning frame is still very popular in some traditional woolen spinning enterprises.
Woolen yarn has completely different qualities and aesthetics than worsted yarn. The fibers in slub yarn are less parallel and the yarn is bulkier, allowing for bulkier knits and flannel garments. Woolen systems can handle shorter fibers than worsted systems and are…�Adaptable to a variety of fiber blends, including blends with high proportions of recycled fibers.
Traveling spinning machines can be divided into three forms according to the moving parts: one is the walking type with the spindle frame (i.e. the spinning wheel), the second is the walking type with the roving creel, and the third is the spinning machine with both the roving frame and the spindle frame moving.
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