Improve the production efficiency of automatic winding machine
Improving the operation efficiency of the automatic winder is a comprehensive indicator to judge whether to use the automatic winder scientifically. It can objectively reflect the quality of the bobbin, whether the process parameters are reasonable, whether the worker's operation method is correct, and whether the equipment maintenance work is in place. At present, in the use of enterprise automatic winders, due to the gaps in the above aspects of work, there is a large gap in operating efficiency. The production efficiency of well-used enterprise equipment reaches more than 90%, and the average enterprise is 80% ~ Between 85%, a few enterprises are only 70% or even lower, and the difference between the production efficiency of advanced and backward enterprises is about 20%. Therefore, to use automatic winders scientifically, we must first grasp the important links to improve the production efficiency of equipment. Generally, the production efficiency of automatic winders should reach more than 85%. How to achieve this goal? According to the experience of many enterprises, the following tasks should be done.
Improve the quality of bobbins and increase the capacity of bobbins
The bobbin yarn has fewer defects and is well formed. When the automatic winder is unwound, it can reduce the unwinding, reduce the breakage, and improve the operation rate. At the same time, appropriately increasing the capacity of the bobbin at a certain spindle speed of the spun yarn and reducing the number of knotting knots during winding are also a measure to improve the operating efficiency of the equipment. At present, some cotton spinning mills increase the diameter of the ring from 38 mm to 42 mm when spinning 14.5 tex to 9.7 tex yarns, and the bobbin capacity can be increased by 25% to 30%. Each bobbin can reduce the number of knots 6 or more.
Reasonable setting and optimization of yarn clearing curve
Production practice shows that 80% to 90% of the yarn defects are class A and B short chunky yarn defects from the analysis of electric clear cutting yarn defects. The short chunky yarn defects are set strictly and loosely, which determines the number of tens of thousands of meters. . Tests have confirmed that the number of shears per 10,000 meters is between 6 and 7 times, and the rate of single spindle operation can reach 85% to 86.5%. When the number of shears per 10,000 meters is increased to 7.5 to 8 times / hour, the rate of single spindle operation will drop by about 2.0% . Therefore, the setting of electronic clearing process parameters should conform to the following three principles: first, harmful yarn defects or foreign fibers are detected and removed; second, there are few or no harmless yarn defects or foreign fibers are mistakenly cut and removed; third, due to The efficiency reduction caused by yarn clearing should be kept to a minimum. In addition, when using the foreign fiber function electronic yarn clearer, the foreign fiber detection device must be installed in the opening and clearing process to detect most foreign fibers to reduce the number of foreign fiber shears on the automatic winder. Some factories have conducted many tests. After installing the foreign fiber sorting device in the opening and cleaning process, the number of cutting defects on the automatic winder can be reduced by 55% to 60%, which greatly improves the production efficiency. Therefore, for foreign fiber containing For many raw cottons, it is undesirable to rely solely on electric clearance.
Strengthen the training of gear mechanics and correctly implement the operation method
Due to the high technical content of the automatic winder and the fast running speed, it is required that the shifters must be familiar with the performance of the machine and correctly understand the operating essentials of each component. Therefore, the shifters must undergo more than 20 hours of training before taking up the job. Some factories have done analysis and determination, the length of training for operators, and the level of proficiency in operations have a greater impact on production efficiency. For example, if one operator is trained for more than 20 hours and the working time is more than 6 months, the machine will be shut down due to the proficient operation, and the equipment operation efficiency will reach 85% or more. The efficiency is only 78%, and the difference between the two is 7%, so the training of gear mechanics cannot be ignored.
Do well the temperature and humidity control and adjustment of the winding workshop
Due to the use of air splicing and electronic yarn clearing technology, the automatic winder has stricter requirements on the temperature and humidity of the workshop than the ordinary winder. If the relative humidity in the workshop is too low, the yarn channel becomes astringent and the cohesion decreases, which will not only increase hairiness And will produce sudden yarn defects. Therefore, in addition to controlling the spinning process, especially the two moisture regain control points for cotton rolls and rovings, a certain number of air changes and proper temperature and humidity conditions should be maintained during the winding process, and the temperature should be controlled at 22 ℃ -30 ℃. The relative humidity is controlled within the range of 62% to 72%. In particular, the use of capacitive electronic yarn clearer is more sensitive to changes in temperature and humidity. Improper control will increase yarn breakage and miscutting, affecting production efficiency. Therefore, the understanding that the winder workshop does not need to install air conditioning equipment is not comprehensive.
Reasonably control the running speed of automatic winder
The speed of the automatic winder is high and the output is high, but it will increase the hairiness to a certain extent. Must pass the test, based on the maintenance of the key components of the yarn channel, control the hairiness to the lowest premise, properly increase the speed of the winding, and maximize the production efficiency of the automatic winder machine .