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首页> 外文期刊>Journal of The Institution of Engineers (India), Series E. Chemical Engineering and Textile Engineering >Impact of Positive Thread Feeding for High-Speed industrial Lockstitch Sewing Machines: Part I Development of Device
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Impact of Positive Thread Feeding for High-Speed industrial Lockstitch Sewing Machines: Part I Development of Device

机译：高速工业锁定缝纫机积极螺纹喂养的影响：第一部分的开发

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摘要

During high-speed industrial lockstitch sewing,repeated stresses and strains on the needle thread adversely influence its sewing performance.The sewing performance of threads is affected by reduction in its tensile strength.For maximum strength retention of needle thread,a positive thread feeding device is developed,which is independent of the fabric feed mechanism as in conventional sewing,where sewing thread is pulled from the cone directly wherein the thread feed is controlled by spring disc tensioner and needle movement.The dynamic needle thread tension is measured above the needle bar using strain gauge load cell.The load cell converts force or weight into electrical signal.The highest thread tension(stitch tightening tension)occurs when the take-up lever pulls the required thread amount through the spring disc tensioner.Positive thread feeding of needle thread lowers the tightening tension(peak tension),and hence,strength retention of needle thread is observed.In this paper,the breaking force of mercerized cotton needle thread at various sewing variables,viz.fabric density,number of fabric layers,and stitch length,is studied during conventional sewing and also by using positive thread feeding device.The loss in breaking force increases with the increase in fabric density,whereas it decreases as the number of fabric layers and stitch length increased.
机译：在高速工业锁定缝制期间，针线上的重复应力和菌株对其缝纫性能产生不利影响。螺纹的缝纫性能受到抗拉强度的降低的影响。对于针线的最大强度保持，正绕线装置是开发的，它与常规缝制的织物进料机构无关，其中缝制螺纹直接从锥形从锥体中拉出，其中螺纹进料由弹簧盘张紧器和针头移动控制。动态针线张力使用在针杆上方使用应变计载荷电池。负载电池将力或重量转换为电信号。当卷杆通过弹簧盘张紧器拉动所需的螺纹量时，最高螺纹张力（针脚拧紧张力）发生。针线的阳性螺纹馈送降低拧紧张力（峰值张力），从而观察到针线的强度保持。在本文中，B在常规缝纫过程中研究了各种缝纫变量的丝光棉针螺纹的圆形棉花针线，织物层数，以及缝合长度，以及使用正绕线送料装置。断裂力的损失随着增加的增加而增加织物密度，而随着织物层的数量和缝合长度的增加而降低。

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