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The latest technology progress of spinning machinery at ITMA ASIA+CITME 2022 were summarized. Taking the representative spinning equipment in the exhibition as examples, new products and innovative technology launched by famous domestic and foreign enterprises were highlighted, including carding machine, comber, drawing frame, roving frame, spinning frame, bobbin winder, two-for-one twister, new spinning machine and so on. It was pointed out that the exhibition focused on the themes of digital transformation, green development and cross-border integration of emerging industries, highlighted the concern from the spinning machinery industry for sustainable and smart solutions in the environment of gradual recovery of the global economy. It is considered that the development trend of spinning equipment is high efficiency, energy saving, digitalization, automation and intelligence. [ABSTRACT FROM AUTHOR]

In order to reduce the labor intensity of workers and achieve the automatic holding and placing of fiber bales for reciprocating automatic bale plucker, the structure of an AGV-based holding cart of the belt and packaging bag automatic removal machine for fiber bales was introduced. The holding device of the cart was designed. The dimensions of the holding gripper of the holding device were determined. The main mechanisms and parts of the holding device and its supporting part were designed and calculated. According to the working requirements, the parameters of the rack and pinion of the drive mechanism of the holding gripper were designed. The load of each oil cylinder was determined and the selection of the oil cylinder were performed by carrying out force analysis of the fiber bale and each component. Based on the design, the height of the holding gripper was 1 200 mm, and length of the holding gripper was 600 mm. The opening and closing range of the gripper was 660 mm to 910 mm. The working pressure of the oil cylinder of the gripper was 140 kg/cm². The diameter of the oil cylinder was 100 mm, and the stroke was 5 mm to 280 mm. The minimum working pressure of oil cylinder of the supporting machanism of the gripper was 0.97 MPa. The oil cylinder diameter was 80 mm, the rod diameter was 40 mm and the stroke was 400 mm. [ABSTRACT FROM AUTHOR]

In order to solve the problem of falling detection for the elderly living alone, a low-cost fabric pressure sensing array and pressure distribution detection system are designed. Several silver plated conductive yarns were arranged on the front side of the fabric substrate at intervals along the warp direction, while another group of several silver plated conductive yarns were arranged above the first group at intervals along the weft direction. Pressure sensing units were printed at the intersection of two groups of silver plated conductive yarns. The electromechanical properties of the sensing unit was experimentally tested. A pressure distribution detection system based on the sensing array was designed using Arduino microcontroller unit and multiplexers to measure the resistances of all the sensing units in the array to obtain the distributed pressure value. The results show that the resistance of the sensing unit which exhibits a significant piezoresistive effect decreases exponentially as the pressure increases. The sensing unit the maximum measurable pressure of which can be 25 kPa has reliable electromechanical stability. The pressure distribution can be detected by the sensing array, which will lay a foundation for the subsequent detection of the fall of elderly people. [ABSTRACT FROM AUTHOR]

A numerical model is presented to simulate the fiber motion in the airflow inside the vortex spinning nozzle (VSN). The coupling between the fiber and airflow together with the fiber-wall contact is solved. Based on the numerical model, the motional characteristics of four types of fibers-cotton, viscose rayon, lyocell, and polyester fibers-in the airflow inside the vortex spinning nozzle are simulated and analyzed-The vortex yarn structure is viewed under the scanning electron microscope and the fiber strength utilization factors of the vortex yarns spun from different types of fibers are compared to verify the wrapping effects of different types of fibers in the vortex yarns obtained by the numerical simulation. The agreement between the numerical and experimental results shows that the numerical modeling methodology proposed in this research provides a reliable way of investigating the fiber dynamics in airflow and an efficient solution to the mechanical problems in polymer/textile manufacturing processes involving fluid-solid coupling. POLYM. ENG. SCI., 52:856-867, 2012. © 2011 Society of Plastics Engineers, INTRODUCTION Fluid-solid coupling phenomena, such as the flow-induced vibration of a membrane, and the film wrinkling of the film insert molded part (1), are frequently encountered in the engineering applications. [...]