刺辊速度对棉结变化和重新分布的影响

为在梳理过程中能够有效去除棉结,提升梳理及成纱质量,在4种不同的刺辊速度下对棉纤维进行梳理,将生条、刺辊落棉、盖板花和锡林漏底落棉分别采样,利用USTER AFIS测试仪对其棉结的含量和尺寸进行检测。结果显示:棉卷经梳理后其棉结总数下降20.58%~26.7%;棉卷中的棉结经过梳理后重新分布在生条、刺辊落棉、盖板花和锡林漏底落棉中,其中生条中的棉结含量最高,占总量的90%左右,依次为盖板花、刺辊落棉和锡林漏底落棉;与棉卷中棉结的平均尺寸相比,生条中棉结尺寸降低13.1%~14.2%,而刺辊落棉和盖板花中棉结尺寸分别增加12.6%~19.2%和8.4%~10.3%,锡林漏底落棉中棉结尺寸降低2.6%~4.6%;生条中棉结含量随着刺辊速度的增加总体呈现降低趋势。

Effect of taker-in speeds on variation and redistribution of nep

In order to remove nep effectively in carding so as to improve carding and yarn quality, the cotton fibers were carded at 4 taker-in speeds, the content and size of nep in card sliver, taker-in droppings, flat strips and cylinder screen droppings were tested using USTER AFIS tester. Results show that total neps are reduced by 20.58%-26.7% after laps are carded; the neps in cotton lap are carded and redistributed in card sliver, taker-in droppings, flat strips and cylinder screen droppings, and nep percentage in card sliver is the highest, at about 90%, followed by that in flat strips, that in taker-in droppings and that in cylinder screen droppings; comparing with the average size of total neps in cotton lap, that in card sliver is decreased by 13.1%-14.2%, while that in taker-in droppings and that in flat strips are increased by 12.6%-19.2% and 8.4%-10.3%, respectively, and that in cylinder screen droppings is reduced by 2.6%-4.6%; nep content of card sliver has a tendency to decrease with the increase of taker-in speed.