精梳机顶梳齿密对长绒棉精梳质量及成纱质量的影响

文章建立了顶梳梳理度数学模型,分析了单根纤维受到顶梳梳针的作用齿数与顶梳齿密的关系;保持精梳机其他工艺参数不变,分别改变顶梳针齿密度,探讨了顶梳齿密对长绒棉精梳质量及成纱质量的影响。结果表明:适当增加顶梳齿密有利于排除小卷中的短绒及棉结,改善成纱条干,提高成纱强力。顶梳齿密过高会造成纤维损伤,引起精梳条中短绒、棉结含量增多,成纱质量恶化。顶梳齿密需结合原棉品级与纺纱品种合理选配,加工9.7 tex长绒棉精梳纱时,设定顶梳齿密为32齿/cm,可以较好地兼顾精梳质量及纱线品质。

Effect of Tooth Density of Top Comb on Combing and Yarn Quality of Long-staple Cotton

The paper established a mathematical model of carding index of the top comb,and analyzed the relationship between the number of comb teeth for single fiber and the tooth density of top comb.The effect of tooth density of top comb on combing and yarn quality of long-staple cotton was studied via keeping the other process parameters of the comber unchanged and changing the tooth density of the top comb respectively.The results show that properly increasing the tooth density of top comb is beneficial to eliminate the short fibers and neps in the laps,improve the yarn evenness and enhance the yarn strength.If the tooth density of the top comb is too high,it will cause fiber damage,which will increase the content of short fibers and neps in combed sliver and weaken the yarn quality.The tooth density of top comb should be reasonably selected based on the grade of raw cotton and the type of spinning.In the production of 9.7 tex long-staple cotton combed yarn,when the tooth density of top comb is set to 32 teeth/cm,the yarn has both good combing quality and yarn quality.