Effect of Yarn Hairiness on Energy Consumption in Rotating a Ring-Spun Yarn Package

Abstract

The effect of yarn hairiness on energy consumption when rotating a ring-spun yarn package is investigated theoretically and experimentally. A theoretical model is developed to calculate the energy required to rotate hair fibers, based on hair length and number as well as package speed and size. A single spindle test rig is used to verify the theoretical prediction. The experimental results confirm the theoretical prediction that the package power increases with increased yarn hairiness level and spindle speed.In recent years, considerable research has gone into the development of a ring spinning theory [5-12, 16, 17] and studies of yarn hairiness [ 1-3. 15, 18-26]. While ring spinning has been a very important technology for staple yarns, it is also known for its high power consumption and low productivity. It is conceivable that power consumption in ring spinning could be exacerbated by any increase in the hairiness level of yams during the spinning process, because of the likely increase in air drag associated with rotating a hairy yam and yam package.In the only reported trial we could find in the literature [ 14], the power to rotate one frame package of continuous filament yarn was recorded. The package was then wrapped manually with one layer of heavy-count woolen yarn, and the power required was five times the initial result. This highlights the importance of yarn hairiness in energy consumption during ring spinning. But no one has yet attempted to quantify the effect of yarn hairiness on power consumption in ring spinning.In a normal ring spinning process, the total power consumption will include the power required to overcome friction between moving machine parts and to rotate the yarn package and yarn balloon, etc.[4]. In this paper, we consider the simple case of power consumption when rotating a single yarn package. We develop a power model to calculate increased power consumption due to increased hairiness of yarns on the package. We also conduct experiments to verify the power model. Theoretical BACKGROUND

Compact spinning: a comprehensive review of the revolution in yarn manufacturing

“…4 Currently, ring spinning is as a particularly prominently utilized technology for yarn production. [5][6][7][8][9][10][11][12][13][14] One of the prevalent techniques for creating and winding fibers to produce yarn is ring spinning. [15][16][17][18][19][20][21][22] This is attributed to the versatility of ring spinning to spin almost any class of fibers, whether natural or synthetic fibers like cotton, polyester, and so on.…”