Condensed (compact) spinning is a high-tech and highly efficient technology. Changes in downstream market demand not only require companies to use the characteristics of compact yarn to develop new products and show their quality and charm, but also need to further improve the advantages of compact spinning technology to maximize the economic benefits of compact spinning.
Method 1: Install ectopic crossbar The moving device significantly reduces the loss of cots and aprons
During concentrated spinning, the cots and aprons are easy to wear, which increases production costs. Installing an ectopic traversing device can significantly reduce the loss of cots. Loss of roller apron.
Install the eccentric traversing device to position the roving sliver at the left position. After one operating cycle, use the hitchhiker to adjust the device to change the roving sliver to the right. Position operation, and then return to the original drafting route in the next cycle. Such repeated “dislocations” can change the drafting route from one to two, increasing the area of the friction part of the yarn, thereby doubling the life of the rubber roller and apron and halving the loss. The device consists of a bell mouth flat iron positioning seat and an eccentric cam assembly. The position of the bell mouth and the position of the special-shaped tube move a certain distance in the same direction, and the adjustment amounts of the two parts are consistent and remain fixed. This ensures that the relative position of the feed roving and the suction groove of the special-shaped tube remains unchanged after adjustment, and will not affect the compact spinning. agglomeration effect. The eccentric cam assembly is fixed on the roller seat with screws and retaining rings. When the turner on duty removes the special-shaped pipe to clean the winding, there is no need to remove it, so it is not easy to fall off and be lost. This device is suitable for both single bell mouth and double bell mouth feeding and drafting. Through the actual installation test, the device operates normally and has no impact on the spinning quality. This device is suitable for most compact spinning machines. It is convenient and easy to modify, has fast investment recovery, is simple to adjust, and has no impact on the start-up time and cycle.
The ectopic traverse device can significantly reduce the loss of rubber rollers and aprons. Taking the apron loss of Celosa produced by a 456-spindle compact spinning machine as an example, the upper and lower rubber rings The circle price is 1.8 yuan and is updated every 2 months. The annual cost of each car is 4924.8 yuan. After using this device, it saves 2462.4 yuan, which means that each spindle can save 5.4 yuan per year, and 100,000 spindles can be saved every year. 540,000 yuan, coupled with the reduction in rubber roller costs, the economic benefits are considerable.
Method 2 improves the movement of whiskers and stably improves spinning quality
Improving the movement state of the whiskers in the gathering area can keep the gathering spinning machine in good condition and steadily improve the spinning quality.
The change of the state of the whiskers in the aggregation area is the main factor affecting the quality of the gathering. It mainly occurs during the transfer of the whiskers from the roller to the negative pressure tube and when the whiskers are under negative pressure. During the movement on the tube. During the transfer process from the roller to the negative pressure tube, the whiskers will fall or tilt left and right in the “uncontrolled area” between the roller and the negative pressure tube. Experiments have found that about 30% of the spindles will exceed the limit. Normal standard value. Excessive pressure on the cradle, the generation of static electricity, poor surface condition of the rubber roller and low negative pressure will all affect the movement of the whiskers during this process. In actual production, the cradle pressure should be kept small to prevent the generation of static electricity, keep the surface of the rollers and rubber rollers smooth and clean, choose to use ultraviolet light to treat the rubber rollers to prevent fiber adhesion, and at the same time maintain negative pressure adjustment to prevent the occurrence of stringy conditions. Variety. When the whiskers move on the negative pressure tube, the aggregation state will change, causing the fibers to become scattered, resulting in a large increase in hairiness and a sharp increase in the breakage rate. There will also be a high breakage rate in a single spindle or the inability to spin normally, but the overall Good production phenomenon. The main reasons for this phenomenon are: first, the problem with the startup program design of the modified machine caused the negative pressure fan to not start; second, the accumulation of dust in the negative pressure air box was not cleaned in time, resulting in too small negative pressure. Therefore, operation management must be strengthened and timely cleaning is required. For mesh hoop accumulation, pay attention to selecting an anti-static mesh hoop with appropriate mesh number based on the type of fabric being spun.
In addition, the forward stroke of the drafting rubber roller should be set reasonably and the value should be reasonably controlled between 2mm and 3mm; at the same time, measures should be taken on the exhaust system to Control temperature and humidity differences to reduce the impact of temperature differences.
Method 3 adds a pneumatic aggregation device with lower investment cost
Adding a set of pneumatic gathering devices in front of the drafting device on an ordinary ring spinning frame is an available way to improve the performance of the gathering spinning frame.
A control roller is added in front of the front roller, with a control rubber roller installed on it. An apron similar to the middle roller is placed on the rubber roller and bracket to form a similar middle roller with opposite directions. The tip of the upper rubber ring of the roller penetrates between the front roller and the front rubber roller, and a special-shaped cross-section suction and gathering tube is installed under it. Together with the suction and gathering tube used as a negative pressure and a special-shaped mechanical gathering component, it forms a set of agglomeration system, which is similar to that of a pulley. The lower pin rod of the lower apron in the stretching device is clamped to the whiskers output by the front roller so that the stretched whiskers are immediately gathered by the mechanical mechanism to initially gather the yarn, and then the control roller and control top roller Under the transmission, the yarn is additionally gathered through the negative pressure suction and gathering tube, the cross-sectional area of the yarn is reduced, and the twisting triangle area is greatly reduced. The special-shaped negative pressure suction tube and the bundler work together to gather the fiber strands output from the roller nip line in front of the drafting device of the traditional spinning machine on one line. The control roller is driven by the head draft transmission system through a set of intermediate gears, synchronized with the front roller, and relies on frictionRotate the rubber ring and rubber roller. In order to ensure that the yarn is drafted and extracted smoothly, the drafting tension that meets the process needs is set between the front nip and the control nip, and the transmission ratio of the control roller and the front roller should be set to 1.03~1.05. The load-bearing fibers are moderately elongated during suction, allowing the fibers to achieve better evenness.
Structurally speaking, this process belongs to air-suction and resistance twisting. It is a comprehensive condensation method, not expensive roller condensation. Although it is similar to Mazzoli’s grid porous apron, it does not require perforated apron and there is no special-shaped adsorption block in the upper apron. The installation is relatively simple and can be installed on ordinary ring spinning machines to spin different counts. Fine yarn, lower investment cost. </p
