改善过成熟原棉成纱条干的实践

为了改善过成熟原棉的成纱条干水平,减少成纱棉结,针对过成熟原棉细度粗、纤维整齐度差的特点,进行了纺纱工艺试验.开清棉工序要精细抓棉,减少打击点,各机打手速度偏小掌握;梳棉工序降低刺辊速度,增加盖板速度;并条工序合理配置牵伸倍数,提高纤维平行伸直度;粗纱工序采用较小牵伸倍数,较大粗纱捻系数;细纱工序减小后区牵伸倍数,采用附带压力棒的隔距块.通过调整工艺,选用新型专件器材,加强车间温湿度管理,使过成熟原棉成纱条干和棉结得到有效改善.

Practice of Improving over Mature Raw Cotton Yarn Evenness

To improve evenness level of over mature raw cotton and reduce yarn neps, spinning test was done according to big fineness, worse regularity. Careful picking, less beating point, and smaller beating speed should be adopted in opening and carding process. Smaller licker-in speed and higher flat speed should be adopted in carding process, reasonable draft multiple and better fiber straightness should be adopted in roving process, smaller draft multiple, bigger roving twist factor should be adopted in roving process, smaller back zone draft multiple and additional press bar spacer should be adopted in spinning process. Through adjusting processing, choosing new type element, controlling of moisture temperature of workshop, over mature cotton yarn evenness and neps are improved.