Simulation of carding condensing process

A simulation describing the fiber movement during the condensation was conducted, and the effect of the condensation in the carding machine was studied. The simulation results showed that the condensation has the blending and the evening effect on the condensed sliver, which can be explained by the fiber rearrangement. Moreover, the increasing web width and the decreasing condensing length can result in a more uniform sliver. Further, the evening effect of the web width on the web was verified by experiments. The simulation results were in general agreement with the experimental results.

Observation of Damage of Cotton Fiber in the Processes of Blowing, Cleaning and Carding

The quality of the produced yarn mainly depends on the properties of the raw material, its preparation for spinning, the condition of the equipment, and the preservation of the natural quality of cotton fiber during processing. The question of the number of defects in cotton fiber and their total content is a very important issue for cotton spinning. The non-standardized number of defects in the raw material reduces the quality indicators and yarn yield, which requires additional technological processes; therefore, on the part of production, the requirements for reducing the share of cotton fiber defects are constantly increasing. During processing in blowing and cleaning units and on carding machines, the cotton fiber is mechanically damaged. To observation the damaged fibers, we used the Congo-Roth red paint according to the method of Ch. Dore. Despite the carding is considered the last stage in the process of cleaning the fibers from impurities and defects in the spinning system, 30% of impurities and fiber defects still remain on the card sliver. Besides, it should be noted the carding machine is also considered an additional occurrence of defects, in particular (neps), which reduce the quality indicators of the card sliver and the finished product.

Methods of Mounting Saw-Toothed Metallic Wire on the Taker-in and Other Rollers of Carding Machine

Two methods are used for mounting sawtoothed metallic wire on different rollers of carding machine. The taker-in roller of the machine is generally grooved one way starting from one end of the roller to the other end and metallic toothed wires are mounted into the grooves. In course of time teeth of wires are worn out as they interact with fibers and impurities. As a result quality of product is deteriorated gradually. So the general practice is to replace the worn-out wires with new ones. Close observation of gradual wearing out of wire teeth reveals that due to oblique disposition of the teeth, only one of the two transitional edges of the front face of the teeth is mainly worn out leaving the other transitional edge intact. This paper explains one patented method and proposes another novel one that utilizes this unworn transitional edge and thus improves quality of yarn and increases longevity of the wear. The first method proposes taker-in with grooves starting from both ends of the roller. Application of this method will enable spinners to utilize both the transitional edges of taker-in teeth by dismounting the wires from the groove first after some use and then mounting the same wire on the roller again but into the grooves that start from other end of the roller. The second method proposes use of two types of wires on the bare taker-in roller; one type is toothed and another is without teeth. They are mounted on the roller side by side and alternately. Incorporation of tooth-less bare strip of wire gives obliqueness to the toothed wire. This method also will allow utilization of unworn edge of teeth by dismounting the wire first after some use and then mounting them on the roller starting from other end of it. GUB JOURNAL OF SCIENCE AND ENGINEERING, Vol 6(1), Dec 2019 P 27-32

Influence of carding machine productivity on yarn quality

This article is devoted to determining the influence of carding machine performance on yarn quality. The effects of the speed of the receiving and the main reels and the wiring between the main drum and the flat cloth on the quality of the carding tape are also examined.

Effect of Secondary Raw Material on the Change of Single Extensive Elongation of Non-Woven Fabrics

The article describes research studies in the laboratories of the departments of "Spinning Technology" and "Silk Technology". For this purpose were taken samples of cotton fiber and silk waste from the carding machine in the spinning process, 100% cotton fiber waste, 50% cotton fiber, 30% silk, 20% mulberry bark fiber, 70% cotton fiber, 15% silk, 15% mulberry bark fiber, non-woven fabrics were produced from 75% cotton fiber 10% silk 15% mulberry bark fiber blends. The single-period elongation deformation of the obtained non-woven fabrics was determined using the device "Stoyka".

Evaluation of Kenaf/Polyester Fiber Blended Sliver Produced from Carding Machine

Controlling sliver evenness is very important since this parameter can affect the quality of the yarn produced. In kenaf sliver production, kenaf fibres alone could not form a good sliver. Thus, fibres such as polyester are needed to blend with kenaf to improve fibre cohesiveness and form a better sliver. The aim of this study is to identify the optimum ratio of kenaf that can be used for sliver production. The heart of the process for the production of kenaf/polyester slivers is carding. The weight percentage of kenaf used for the kenaf/polyester sliver production was 50%, 60% and 70%. After sliver formation, the waste percentage, diameter and size were determined. The sliver images were analysed under video analyser and captured by digital SLR camera to observe the fibre blending. The research showed that lower percentage of kenaf offered better waste percentage and sliver diameter. Whereas, sliver size showed some decrement with an increment of kenaf fibre percentage. The presence of polyester in the production of kenaf/polyester sliver seems to play an important role to bind the kenaf fibres together.