At present, there are two methods for testing the tension of quilt production line, namely direct testing method and indirect testing method. Special equipment for the textile industry on the winder. As the last process of spinning and the first process of weaving, winding is the link between the past and the next.“bridge”Therefore, it occupies an important position in the textile field.
Grinder A spinning machine that turns fiber strands into rovings. The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame. The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit.
The former can directly measure the tension change of the spinning section, which has the advantages of being faster and more accurate. However, due to the instrument company itself and the use of technical means management, there are still many problems and inconveniences that can be applied and studied in production. , so our current society generally believes that the latter is used, that is, the elongation of the roving is used to indirectly reflect the spinning tension. Because in terms of normal development (when the twist of the roving is constant), the larger the elongation rate, the larger the roving tension; the smaller the elongation rate, the smaller the tension. However, they should clearly point out that roving tension and elongation are two aspects that completely satisfy different physics teaching concepts, and cannot be discussed together; in addition, when testing the elongation of rental yarn, the work demand is large and the process is relatively cumbersome, so Now with the further improvement of the requirements for roving tension control ability, it is necessary to use a new main test method to directly correlate the test results between the tension data.
To test the roving elongation rate, the production plant is the same time, the difference between the actual length of the spool and the length of the wound yarn is calculated as a percentage of the ratio of the output before the roll length is calculated before the output roll. Since the speed of the front roller is faster, it is not easy to grasp the switch off time to be calculated so that the output speed of the front roller and the speed of the back roller are often determined by the calculation of the transmission system. The calculation method of elongation is as follows: the average roving elongation measured by voltametry can generally be required to be in the range of 1%-2% (maximum not more than 2.5%).
The time required for the development of the difference in elongation between front and rear rows and between large and small yarns is not more than 1.5%. When it exceeds a certain range, it should be adjusted in time. At the same time, however, it should be noted that elongation is only an indirect management method to test the tension of the roving, and tension is only an important factor of elongation.
Therefore, when it is necessary to adjust the working tension, it should be based on the actual situation of the students, and the method of combining visual tension and elongation detection should be used to analyze and adjust. (2) Technological adjustment of the tension of the quilt production line When testing or replacing the quilt production line, the following steps are generally taken: 1. Adjust the winding density of the cuff. For normal axial roving density, a gap of 0.5mm should be left between adjacent turns of yarn small; i.e., with the naked eye it can be seen faintly when the first layer of yarn fits around the bobbin surface.
When the axial dimension of the density is changed, the lifting gear can be exchanged, and the winding density is suitable. 2. Determine the iron gun belt as the starting working position, and adjust the yarn tension. 3. Determine the tension change gear, a large warp tension adjustment.
The tension is determined by changing the gear lily belt movement amount, i.e., the winding speed at each stage of doffing, so that the influence of the whole fan yarn large, medium and small yarn tension is large, so the reasonable tension gear arrangement is important .