科研之友
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摘要
When a loom is stopped and restarted, there is often a start-up mark (stop mark) on the fabric where the local pick density deviates from the normal value. The presence and severity of the start-up marks have a direct impact on the value of the fabrics produced. The cause of start-up marks in woven fabric includes cloth fell drifting due to the relaxation of the warp and the fabric, and the loom's dynamic characteristics when starting up. Several methods have been used to reduce the effect of start-up marks. In this study a new method to eliminate the start-up marks has been proposed. In this approach, the warp tension is lowered to near zero when the loom stops, and the loom parameter is readjusted when the loom restarts. A main advantage of the current approach is that its effectiveness is essentially not affected by the time duration of the loom stoppage. The low-tension method for start-up mark prevention can be implemented on any looms with digital let-off and take-up controls. The procedures to control the cloth fell position to prevent stat-up marks are described. The method has been tested in commercial operations producing different styles of fabrics, demonstrating its simplicity, flexibility, as well as effectiveness.
- 出版日期2007
- 单位东华大学
