How to detect and reduce classimat faults:
Detecting process of classimat faults:
Frequent yarn defects that do not occur frequently are classimat infrequent errors. Such errors are Slub, Thick and Thin place. This type of yarn defect is usually scanned using the usterClassimat method. Classimat defects are determined based on the severity of such errors and the nature of the spread of such errors. Before diagnosing this defect, the yarn usually needs to be conditioned for 24 hours at a relative humidity of 65(+/-) 2% and a temperature of 27° (+/-) 20 C. To diagnose such defects in yarn, usually, a random sampling of 100 km in length is taken. At least five such samples were tested. https://bdfabric.com/what-is-uster-classimat/
The fault of the yarn to be tested must be the cheese or cone of the winding machine running at a steady speed. However, in this case, the yarn of cheese winding is given priority. Once the yarn error-proofing test of the usterClassimat machine is completed, the results are available in printout form. This printout of the result contains two sets of data. One of which is the total error of all specified lengths, which is displayed on the left side of the result. In the 2nd set of data to the right of the result, the number of errors per kilometer of yarn is found. In this way, by examining five samples of 100 km of yarn of the same type, the number of defects in that yarn can be determined by averaging it. https://bdfabric.com/operations-for-controlling-fusing-in-garments-industries/
How to reduce classimat faults:
How to detect and reduce classimat faults. If measures are taken to reduce the infrequent yarn defects, on the one hand, the yarn defect will be reduced, on the other hand, the spinning activities and the visibility of the fabric made from the yarn will be greatly improved.
1. the Adequate number of beating points should be used for proper opening and cleaning of cotton keeping in view the quality of cotton processed in the blow room.
2. To properly clean and separate the fibers in the carding machine, the carding machine which has a slow production rate has to be used and the fiber has to be carded twice. High-speed cylinders and flats can also be used. In addition, the amount of waste extraction should be increased to reduce the yarn defects in the classimat test.
3. During combing, the amount of Noel extraction should be increased to better remove the naps and fiber clusters, so that the yarn defects are reduced.
4. Proper process parameters must be used in spinning. Spinning machines need to be properly cleaned and maintained. The drafting system needs to be cleaned regularly. Appropriate drafting aprons should also be used and the aprons should not be cracked or torn. The machine needs to be cleaned after each duff descends on the roving frame. In addition, an overhead cleaner should be used on the spinning frame to reduce the long length of the yarn.
If the control measures mentioned in the spinning section are adopted, yarn errors and classimat errors will be greatly reduced.
