Optimizing Fiber to Roller Interaction, Finisher Speed and Levelling Action Point Via Spectrogram Analysis for Improved Yarn Quality

초록

The main objective of the present research is to improve yarn quality by improving yarn evenness and strength while increasing the finisher speed. In this study, using spectrogram analysis, the drafting wave behavior in the finisher sliver was examined on the RSBD-35 drawing frame. The polyester-cotton blend (80:20) was developed at the varying delivery speeds (400, 500, and 600 meter/min) drawing frame to evaluate changes in sliver evenness and yarn characteristics. Based on the spectrogram analysis, the processing parameters were optimized and the sliver for the yarn preparation was developed at drawing frame at the optimized leveling action point (LAP; 984 mm) and 65.5 grains/yards. The yarn of 30/1 (Ne) was developed from the prepared sliver using the conventional ring spinning process. The coefficient of variation of mass (CV%) of the prepared sliver samples was determined by the UsterTester-3 (UT-3). The fineness/count (Nec) of the prepared samples was determined by following the standard test method ASTM-D1907. The quality parameters of the yarn including thick imperfection index (IPI;), U%, CV%, hairiness were determined by UsterTester by following the standard test method (ASTM D1425). The results indicated that increasing the finisher speed (600 m/min) reduced the LAP (984 mm) for PC yarn without compromising yarn quality indicators; U% (9.63), CV% (12.22), IPI (133), hairiness (4.27), and strength (CLSP: 4953). These results demonstrate the effectiveness of optimizing draw frame parameters in balancing productivity with yarn quality. © 2025 All rights reserved.

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