Simulation of the fiber arrangement in a sliver based on the distribution of the sliver linear density

The fiber arrangement in a sliver plays a significant role in determining the sliver evenness. In this research, an innovative method was proposed to simulate the fiber arrangement, based on the variation in linear density, relative to the mean values along the sliver axis, acquired from the measured distribution of the sliver linear density. The simulated results for three polymer carding slivers and three cotton carding slivers show that the fiber arrangement in the sliver can be concretely and graphically expressed by the variation of the linear density of each sliver subsection, relative to the mean sliver linear density. Moreover, the simulated sliver irregularities and frequency distributions of the carding sliver linear density in the sliver, based on the actual variation curve of the sliver linear density and the actual frequency of the sliver linear density, all conformed better to the actual slivers, compared with the simulated slivers with the method based on a random fiber arrangement. However, a comparison of the simulation results for these two methods demonstrates that the method based on the actual variation curve of the sliver linear density can only simulate the fiber arrangement of the test section. Conversely, the method based on the actual frequency distribution of the sliver linear density can simulate the fiber arrangement in the whole carding sliver, so that it is more applicable for use in further post-spinning processes with the accurate simulation results.