粗纱物理特性对环锭纺细纱机后区牵伸效果影响  

Influence of roving performance on back drafting of ring spinning frame

作　　者：吴佳庆 郝新敏 王美慧 郭亚飞 王迎 WU Jiaqing;HAO Xinmin;WANG Meihui;GUO Yafei;WANG Ying(School of Textile and Material Engineering,Dalian Polytechnic University,Dalian,Liaoning 116034,China;Systems Engineering Research Institute,Academy of Military Science,Beijing 100084,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034 [2]军事科学院系统工程研究院,北京100084

出　　处：《纺织学报》2024年第4期76-82,共7页Journal of Textile Research

基　　金：国家自然科学基金项目(U1808211);辽宁省重大科技专项项目(2019JH1/10100010)。

摘　　要：为探究粗纱在细纱后区的形态变化和粗纱物理特性能对细纱后区牵伸效果的影响,以不同粗纱定量、捻度和纤维长度的粗纱为例,分析粗纱截面纤维分布、粗纱定量和捻度等物理特性对粗纱拉伸强力影响、粗纱须条在牵伸区的变化以及基于等长切断称重法分析牵伸效果。结果表明:在牵伸过程中粗纱须条截面从圆形变成扁平带状后又恢复成一定紧密度的类圆形;粗纱定量为450 g/(10 m),捻度为4.01和4.48捻/m的粗纱力学性能好,利用粗纱捻回产生的附加摩擦力界能有效控制纤维的运动,牵伸区内纤维变速点集中,牵伸效果好;大定量粗纱受罗拉胶辊差速影响易发生纤维分层,纤维变速点分散,需加大罗拉钳口压力予以改善;后区牵伸倍数在1.10~1.36倍以内,有利于牵伸稳定。Objective The purpose of this paper is to explore the shape change of roving whisker in the back drafting area of spinning frame and the influence of roving performance on the drawing effect of the back drafting area of spinning frame.It has certain beneficial effect for producers to set the roving production process and optimize the spinning production parameters.Method In this research,polyester fiber(1.67 dtex×38 mm)and viscose fiber(1.67 dtex×51 mm)were used as raw materials to prepare roving samples with different roving weights,roving twist and fiber length.The roving section was observed by resin embedding method,and the roving mechanical properties were measured by stretching method.The drawing experiment was carried out on the digital spinning machine SSP-01 to observe the shape change of the roving whisker and cut off the drawing sample.The drawing effect of the back area of the spinning yarns was analyzed,based on the isometric cutting and weighing method.Results The section of roving whiskers in the rear drafting area was round at first,became a flat ribbon after extrusion by roller pliers,and then gradually shirked and recovered to a circular shape with a certain tightness.Roving(450 tex,4.01 twist/m or 4.48 twist/m)had better mechanical properties than another samples.The additional friction boundary generated by roving twist back was found to control effectively the movement of fibers,so that the fiber accelerated points was concentrated and close to the clamp mouth of the middle roller,and the drafting effect was stable.The variation of roving strength indirectly proved that the roving strength was better at the twist of 4.01 twist/m and 4.48 twist/m,indicating that the additional friction boundary generated by roving twist back could effectively control the fiber movement.The drafting effect of 350 tex roving whisker met the draft requirement of concentration of the fiber accelerated point and as close as possible to the jaws of the middle roller when the draft multiple of the back area was 1.1

关 键 词：后区牵伸 粗纱须条运动 粗纱强力 纤维变速点分布 等长切断称重法 

分 类 号：TS104.1[轻工技术与工程—纺织工程]