АНАЛИЗ ДВИЖЕНИЯ ВОЛОКНИСТОГО МАТЕРИАЛА В ФОРМИРУЮЩЕМ БУНКЕРЕ

МАТЕРИАЛОВЕДЕНИЕ

Abstract

An experimental method for analyzing the movement of a fibrous material in a forming bunker of a two-chamber hopper feeder at processing fine-fiber cotton is proposed. It is shown that in spite of somewhat increased unevenness of the carding tape with impoverished feeding, the quality of the semi-finished products along the transitions in the compared variants is equalized. The level of breakage, and the physical and mechanical properties of the yarn in the control and test versions differ little. The tests carried out proved the absence of a negative effect of the lack of energy of the carding machines on the technological process in the system of combed spinning of cotton. It is also proved that for the stability of the feed process, it is necessary to conduct research on the use of means that allow to reduce the magnitude of the phenomenon of the cotton hanging between the walls of the forming bunker at the minimum width of it. It has been experimentally proved that at a large width of the forming bunker, a significant compaction of cotton falls on its lower part before entering the clamping zone of the outgoing rollers which will force out the layers of cotton of its total weight supported by these rollers. Based on the analysis of the results of the experiments, it can be concluded that as the filling level of the cotton bunker increases, the density of the fiber increases. In the paper, it is shown that in the general case, the different values of the height of the sections with constant density in the lower part of the hopper cause the fiber density to fluctuate with different loosening effects in the sorting and trebling workshop and fluctuations in the filling level of the hopper with cotton. Therefore, in order to ensure a uniform planking of the fibrous material on the feeding table of the machine, it is necessary to ensure a stable density of the pulp on the largest possible portion of the forming hopper in front of the fiber zone by the outgoing rollers.