Theory and Practice of Multi-Fiber Blending Carding with Fully Fixed Flat

Abstract

To investigate the differences in the carding effect between fully fixed flat carding machines and movable flat carding machines, this study employed the Fluent software to conduct numerical simulations of airflow velocity distributions between the cylinder and flat of both machine types, with particular focus on analyzing the airflow patterns near microscopic needle teeth. The simulation results were further verified by practical carding and spinning experiments of multi-fibers, namely diacetate, viscose, heat-shrinkable acrylic, micro-denier acrylic and wool fibers. The results demonstrate that the fully fixed flat carding machine exhibits a more stable airflow boundary layer near the needle teeth, which enhances the carding effect as evidenced by improved yarn quality parameters.

Keywords

carding machine / fully fixed flat / multi-fiber blending / simulation

References

[1] Bagwan A S A, Jadhav K. Card setting: a factor for controlling sliver quality and yarn[J]. Journal of Textile Science & Engineering, 2016, 6(2): 1-3.

[2] Guo D L, Dong Z Q. Development overview of new foreign carding machine and carding technology[J]. Cotton Textile Technology, 2015, 43(10): 79-84. (in Chinese)

[3] Sun P Z, Cao J P. Advance in research on entire stationary flat card[J]. Journal of Textile Research, 2009, 30(5): 137-141. (in Chinese)

[4] Mandl G. New technology for improved carding[J]. Melliand English, 2005(3): 18-21.

[5] He S S, Cheng L D, Xue W L, et al. Three—dimensional numerical simulation of air flow and fiber dynamic in carding region in carding machine[J]. Textile Research Journal, 2019, 89(19/20): 3916-3926.

[6] He S S, Cheng L D, Xue W L, et al. Card clothing with misaligned teeth for the card: Carding mechanism and application[J]. Textile Research Journal, 2023, 93(1/2): 124-132.

[7] Ou H L. The analysis of the air flow theory of the card and the anatomy of the case[J]. Textile Accessories, 2013, 40(6): 6-9. (in Chinese)

[8] Xiao J M, Zeng Y P, Dai X L. Development and use of full—fixed flat carding machine[J]. Cotton Textile Technology, 2018, 46(6): 67-73. (in Chinese)

[9] Chen Y F. Process principle and spinning effect analysis on entire stationary flat card[J]. China Textile Leader, 2022(3): 80-83. (in Chinese)

[10] Wang H W, Zhang Z Q, Zhao J K, et al. Application effect analysis of full fixed flat carding machine[J]. Cotton Textile Technology, 2023, 51(4): 48-52. (in Chinese)

[11] Jin X, Gu Y J. Development of diacetate fiber and modal blended knitted home—wear fabric[J]. Knitting Industries, 2024(2): 5-8. (in Chinese)

[12] Pavlov T. Textile airflow problems[M]. Zhou C N, Xing Y S, trans. Beijing: China Textile & Apparel Press, 1988. (in Chinese)

[13] Liu R, Wang B. Cotton spinning test[M]. 3rd ed. Beijing: China Textile & Apparel Press, 2008. (in Chinese)

[14] Cao J P, Zhang Z D, Zhang M G, et al. Correlation analysis on relationship between short fiber content of card sliver and yarn parameters[J]. Journal of Textile Research, 2018, 39(12): 30-36. (in Chinese)

[15] Hossain M A, Haque M S, Mohiuddin M, et al. A novel approach to produce neppy yarn in vortex spinning technology[J]. The Journal of the Textile Institute, 2025, 116(1): 1-11.

[16] Wu D Y. The cause and control of yarn hairiness[J]. China Fiber Inspection, 2018(12): 133-134. (in Chinese)

[17] Ou H L. The cause and control of the hairiness of the ring spun yarn[J]. Textile Accessories, 2013, 40(3): 22-26.

[18] Li X L, Yang Q Y. Factor analysis of affecting regenerated cellulose fiber carding quality[J]. Cotton Textile Technology, 2022, 50(5): 48-52. (in Chinese)