Compact spinning with a lattice apron has recently become a very attractive approach for pneumatic compact yarn production spinning systems. One of the main challenges with use of this method is the high negative pressure that leads to high energy consumption. In response to this challenge, we present a numerical and experimental investigation of the effects of a three-dimensional (3D) printed guiding device on the airflow characteristics and yarn properties. Initially, the 3D numerical model of the compact spinning system was set up based on the real geometrical dimensions. Secondly, the 3D prototype was developed, simulated, and analyzed using Solidworks and Ansys. Ultimately, the design, which exhibited low negative pressure along the model domain, was adopted and then 3D printed to enable further experimental investigation. Airflow analysis results illustrated that when using the guiding device with low negative pressure, the active area of negative pressure was increased. This was due to the existence and the special design of the guiding device that prevented the decrease of the negative pressure with atmospheric pressure. This increased the transverse condensing force, which was beneficial for twisting the free-end fiber around the fiber bundle. Experimental results revealed that the three yarns spun with the guiding device achieved significant energy saving when the guiding device was used. Moreover, these yarns spun with the guiding device had better strength, hairiness, and evenness than those spun without a guiding device. The model developed can be further improved and utilized for commercial purposes, as it significantly reduces energy costs while improving yarn properties.

带格子皮圈的紧密纺最近已成为气动紧密纱生产纺纱系统的一种非常有吸引力的方法。使用这种方法的主要挑战之一是导致高能耗的高负压。为了应对这一挑战，我们对三维 (3D) 打印导向装置对气流特性和纱线特性的影响进行了数值和实验研究。最初，紧密纺系统的 3D 数值模型是基于真实几何尺寸建立的。其次，使用 Solidworks 和 Ansys 开发、模拟和分析 3D 原型。最终，采用沿模型域表现出低负压的设计，然后进行 3D 打印以进行进一步的实验研究。气流分析结果表明，当使用低负压导向装置时，负压有效面积增加。这是由于导向装置的存在和特殊设计，可防止负压随大气压降低。这增加了横向凝聚力，有利于围绕纤维束扭转自由端纤维。实验结果表明，使用导向装置纺制的三根纱线在使用导向装置时都实现了显着的节能。而且，这些用导向装置纺成的纱线比没有导向装置纺出的纱线具有更好的强度、毛羽和均匀度。开发的模型可以进一步改进并用于商业目的，