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Abstract
This study aimed to develop a dynamic model of a roller carding machine. The roller carding machine used in this study comprised one set each of feed conveyors, feed rollers, licker-in rollers, clothing rollers, a set consisting of a cylinder and doffer and two sets of carding rollers/stripping rollers. In order to establish a dynamic mathematical model of a roller carding machine, this study derived the transfer rate and collecting power of cotton web from the mode of movement, relative velocity, clothing tooth angle and friction force of the main rollers of the system. The transfer delay time of the cotton web was deduced from the clearance among working rollers, corresponding angle of roller center, and angular velocity. Finally, the correctness of the dynamic mathematical model of the roller carding machine derived in this study has been proved from the experiment.
Keywords
Roller carding machine, dynamic mathematical model, transfer rate, collecting power, transfer delay time
(ProQuest: ... denotes formulae omitted.)
Introduction
The carding process is the primary factor influencing the quality of spun yarn, and the nature of cotton web determines the quality of cotton textile products. An important indicator used to assess the quality of spun yarn products is the appearance, while the key factors affecting the appearance include cleanliness of spun yarn, impurities in the spun yarn, nep in rude cotton, and fiber tuft produced during processing. The treatment of rude cotton and the formation of spun yarn in the textile industry process are finished by the carding process, thus, the carding machine is critical to the quality of spun yarn.
In the carding process, carding is the action of reducing tufts of entangled fibers into a filmy web of individual fibers by working the tufts between closely spaced surfaces clothed with opposing sharp points.1 A carding machine is a basic device used to produce uniform web and yarn, whose primary function is to disentangle twisting fibers, so that fibers can be separately arranged. After the impurities and dusts are removed, this carding action may be used as an aid to fiber carding for uniform web formation.
Past studies on mathematical models of roller carding machines are summarized as follows. Higuchi et al. developed a first order mathematical model of a...