Study Of Facilities Of Lattice Apron On Compacting Spinning

Compact spinning is a new spinning technology which develops fast in the recent years . Compact spinning technology makes drafting,compacting and twisting separated adopting compact set. Compact spinning technology can reduce spinning triangular space to minimum,decrease yarn hairiness,improve yarn break strength and break elongation ,improve the resultant yarn quality.In the paper, lattice apron and other connected parts were analyzed on negative pressure compact spinning, and the effects of these apparatuses to the abilities of compact-spun yarn were discussed. We analyzed problems in traditional ring spinning technology first, and then the existed compact spinning equipment is classified and compared. The structure and capability of Sussen's Elite compact spinning systems were introduced, and the principle of this equipment was also introduced. We designed our own compact spinning equipment, after studied the lattice apron and the other parts on compact spinning equipment and connected with domestic machines. We have reconstructed spinning frames successfully, such as EJM128k, FA503, FA506, and etc. And the yarn has the better morphological qualities and capabilities . After analyzing on the yarn strip gathering progress by the theories of hydromechanics , we firstly concluded the influence factors of the flow field in condensed area. And then we studied the flow field in condensed area, and finished the tests of flow field in condensed area.On the base of analyzing flow field of compact spinning, all capabilities of lattice apron were classified and explanted. We focused on the analysis of the power which the lattice apron endured, and then made a choose of the raw materials and fabric structure. And the difficulties of making lattice apron were also introduced. In the process of lattice apron study, electrical conductivity, permeability and durability were mainly studied, and unified the yarn performance index, the correlation analysis were made.The principle of compact spinning technology is introduced, especially including the structure and capability of Elite compact spinning systems ,which are devised by the Sussen company ,German . According to the analyses of compact spinning structure, an actual compact spinning system are made according to EJM128K-SM spinning frame. Spinning experiments are carried out .At the meantime, the performance and characteristic of compact spinning systems are analyzed and compared to. Through the study of lattice aprons, excellent lattice aprons are chosen. And discussing compact spinning technology , at last we developed extra high-count cotton yarns with EJM128K-SM spinning frame which was reconstructed by ourselves. By experiments, conclusion can be made as followings .Under the equal conditions,the compact spinning yarn has many distinct characteristics ,such as better structure ,higher breaking force , less hairiness and so on .Compact spinning can also break the limitation of the conventional spinning and high-count yarns(such as 2.9tex-4.2tex) can be produced. Along with the spinning technical development, the people's request to the yarn capability is also higher .Therefore , the thorough investigation of technology and craft to compact spinning ,along with speeding up the compact spinning reformation to national spinning machines ,has an important meaning towards strengthening the competition ability of the business enterprises ,keeping and promoting our country a textile industry in the important position of the international textile product market as well.