1. How to optimize and set the yarn clearing curve? Answer: Optimizing the yarn clearing curve is a long-term process. The basic method is: first, roughly set a more appropriate yarn clearing cur...
1. How to optimize and set the yarn clearing curve?
Answer: Optimizing the yarn clearing curve is a long-term process. The basic method is: first, roughly set a more appropriate yarn clearing curve based on the basic situation of yarn production in the factory; secondly, use the defect-catching function of the electric clearer , grading matrix, scatter plot and customer feedback information, combined with the auxiliary point function of the yarn clearing curve, to adjust the electro-clearing process; then repeat the above steps as needed until the electro-clearing process is optimized.
The standard of the ideal optimization curve: all harmful yarn defects and harmful foreign fiber yarn defects are detected and removed , few or no harmless yarn defects and foreign fiber defects are detected and removed, and the efficiency loss caused by yarn clearing remains small.
2. What is the concept of system yarn cutting?
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Answer: There are several main reasons for system yarn cutting. The Lofi control box will continuously monitor the connected electric cleaners to check whether there is any problem with the software and hardware of each single spindle. If it encounters If there is a deviation in the spindle and it is necessary to perform self-adjustment, the electric cleaner will be ordered to activate the system to cut yarn. Each time the electric yarn cutting is performed, the detection slot will be tuned and cleared. So that the continued winding of the fine yarn will not cause sensitivity variation due to contamination of the yarn path.
To give another example, after self-parameter setting, if the spun yarn joint is completed, it will be within the default length immediately. Foreign fiber yarn cutting occurs and reaches the self-set continuous occurrence of 2 or 3 times, 4 times… Luo Fei can set it up (of course, he can also cancel the setting). The probability of multiple consecutive occurrences of foreign fibers is too low. It may be due to changes in the color or grayscale of the raw cotton. Resampling is necessary to compensate for changing color differences, thus creating a systematic yarn cut for adaptation. The above are the yarn cutting functions of Loepfe Cleaning System. This system’s yarn cutting signal depends on different integrated winding cars. If the winding car deems it necessary, this command can also be issued by the winding car.
3. When warping and rewinding, the yarn ends are broken due to waste yarn or random yarn. How did it come about?
Answer: 1. The waste yarn ejected when splicing adjacent spindles (when the suction nozzle is clogged Bottom) The winding position directly floats into the yarn clearer;
2. When the traveling fan blows, some yarn ends in front or behind the machine are blown up;
3. The yarn ends of the dropped bobbin are being spun. The package is brought in. Generally, this happens when the yarn collector fails to collect the yarn in time and there is a lot of yarn piled behind;
4. The operator did not break the thread ends of the previous package when doffing;
5. The yarn tail left when doffing the yarn (the yarn wound around the big end of the paper tube two or three times) The joint used when putting on the warping machine or knitting machine) is too long or loose and broken and then attached;
6. The doffing and threading operation method is wrong. The yarn end is across the big end of the paper tube. When the warping stopper joins the yarn, the thread end is pulled out across the yarn end, and the other half becomes a waste yarn and is caught in the cheese;
7. When the spindle brake device is not good, the spindle cannot be raised or stopped in time, making it difficult to find the yarn end. During automatic splicing, the large suction nozzle sucks out a yarn and then splices it, resulting in broken ends during unwinding. During inspection, it was thought that the yarn residue was attached ( Breaking the continuous yarn);
8. Even if there is no spindle problem in point 7, it is easy to find messy ends when spinning high-count yarns, especially when there are multiple continuous joints and the package yarn tension is loose (or mechanical reasons, or bobbin reasons; resulting in continuous multiple splices) Secondary joint);
9. The gap between the large suction nozzle or the threading hook and the yarn package is not good, causing yarn grinding.
4. How to set the 16-70D spandex core-spun yarn on 338 How to set the twisting parameters, untwisting code and twisting code? When we were making the 16-70D, the setting was 6 457. The knots made by a single spindle looked pretty good, and the strength was only sloppy. The problem came when the whole bike was made of this kind, and its efficiency was only 58%. The number of repeated knottings has reached 150%. I would like to ask the experts how to solve this problem and whether there should be any changes in knotting, such as untwisting the tube, twisting the knots, etc. Do you need to change other parameters in the computer? The sawtooth we use to untwist the tube and twist the tube is DZ3/16.1E.
Answer: If the knotting effect of the winding machine on a single spindle is okay, but if the knotting effect of the complete machine is not good, you should first consider whether the air supply pressure can meet the standard, especially on a single spindle. The actual air pressure, generally speaking, the air pressure of the entire vehicle can be seen from the air pressure gauge on the front of the vehicle, but the air pressure of the subsequent injector cannot be seen. You can analyze it from the sound of each injector’s air injection. There is also whether the mechanical action coordination is good and whether the yarn cutting and pressing actions are in place. Generally speaking, electronic control can achieve the consistency of the entire machine, but mechanical deviations are more likely to occur after a long time of use. The specific situation can be found in the carTake a look at the above, and when the air pressure and mechanical problems are correct, consider the process indicators and splicing block issues. Generally, the untwisting effect of toothed untwisting tubes should be relatively good. If you feel that the strength is not good, you can also check the untwisting effect first. Please remove the twist agglomeration and let it untwist purely to see. The shape after untwisting can be determined by adjusting the air pressure and the air jet angle of the untwisting tube. If there are other types of splicing blocks, after all the above items are completed, you can also try the effects of different splicing blocks. Another thing to note is whether the sealing of the yarn pressing plate is good when pressing yarn.
5. How to solve the problem of mesh yarn on the SMARO automatic winding machine?
Answer: If mesh or random yarn layers appear on the Qingdao SMARO self-winding bobbin, the following parts should be checked:
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1. Whether the distance between the large nozzle and the bobbin is less than 6mm (when the bobbin is 100mm at the small end);
2. Whether the suction negative pressure is greater than 42, try adjusting it to 38 (it is too small to suck the yarn); When knotting, the yarn cannot smoothly enter the twister channel and the knotting fails, and the knotting is repeated;
4. The yarn pressing rod is deformed, and the yarn is not fed into the yarn clamping plate of the knotting device during the knotting action, causing knotting defects. The yarn is sheared by the electric cleaner or the knot cannot be tied. The knotting fails and the knotting is repeated;
5. Check whether the knotting quality is up to standard. Unqualified knots will be removed through the electric cleaning knot inspection channel and the knots will fail to be tied repeatedly;
6. Is the humidity in the workshop too low? The humidity in the viscose raw material workshop should be greater than 65 %;
7. Check whether there is any waste wire hanging on the tension plate;
8. Whether the tension is adjusted reasonably;
9. The tension is sometimes absent, sometimes large and sometimes small;
10. The angle between the package plane and the groove barrel plane changes.
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