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폴리에스테르 필라멘트 직물의 스낵기구(제1보) -필라멘트 평직물의 스낵 이론-
우범식,김상용 한국섬유공학회 1976 한국섬유공학회지 Vol.13 No.2
Idealized model of plain woven fabrics was chosen to investigate the factors which determine the snag mechanism. From the approach of structural mechanics, it was found that the friction coefficient of fibers, contact angles between warps and fillings, contact length and elastic modulus of yarns are most relevant to the snag mechanism. Energy stored in the yarn per unit volume is proportional to the sum of squares of yarn strain and contact lengths.
우범식,김상용 한국섬유공학회 1973 한국섬유공학회지 Vol.10 No.1
In order to predict the compressional behavior of tufted materials from a knowledge of yarn bending properties and tuft structure, statistical analysis was made for the 40 tufted materials. By selecting ten significant regression models, physical significance was studied. Predictions based on the average pile thickness are for the compression behavior and those based on the initial thickness are for the construction of tufted materials. (Received Feb. 14. 1973)
우범식,이진우 한국섬유공학회 1967 한국섬유공학회지 Vol.4 No.1
The main object of this investigation was to study the effect of the variation in the shedding and beating on the eveness of the physical properties of fabrics. The variation of shedding and beating in weaving is resulted in the uneveness of physical properties of fabrics such as the density in filling direction, thickness as well as tensile strength in filling direction regardless of fabric structures. The beating when next shed is a little opened is found to be the best for the maximum ends per inch of fabrics. It is emphasized that a constant condition of shedding and beating in weaving is essential for the fabrics to obtain the eveness of density in warp and filing direction, thickness, tensile strength and elongation in both directions.
우범식,이재곤,류운영,허유,Woo, Bum-Shick,Lee, Jae-Kon,Ryu, Woon-Young,Heo, You 한국섬유공학회 1978 한국섬유공학회지 Vol.15 No.4
In order to investigate the possibility of improvement of the open end spinning machine which has higher productivity and is more economical than the existing ones, 5 kinds of new open end spinning equipments were designed and operated to produce cotton yarns. The two of those five, enclosed rotor with grooved twister and open rotor with grooved twister, were operated only to produce yarns of Ne 8.5, Ne 4.0 respectively. The quality of both yarns were inferior. The other three types of five, the closed rotor, the closed rotor with radial twister and closed rotor with pinned twister, were operated to produce cotton yarns of Ne 11.0, Ne 11.9 and Ne 10.5 respectively. The quality of produced yarns with these three equipments was fairly good and acceptable.
수직제어방식에 의한 섬유기계의 운전에 관한 연구 제1보 On-off 제어방식에 의한 횡편기의 무늬내기 기구의 시작-
이재곤,우범식,이대훈,Lee, Jae-Gon,U, Beom-Sik,Lee, Dae-Hun 한국섬유공학회 1980 한국섬유공학회지 Vol.17 No.3
In order to investigate the method of pattern forming by the on-off control method in the v-bed flat knitting machine, the needle selection mechanism of the existing v-bed flat knitting machine was converted into newly contrived one which was controlled by the electronic logic circuit. The requirements of the electronic logic circuit and the pattern reading system of the v-bed flat knitting machine were examined. The operational results of the contrived needle selection mechanism by the electronic logic circuit and the pattern reading system showed that the newly contrived system was fully adaptable to the existing v-bed flat knitting machine.
송재수,우범식 한국섬유공학회 1976 한국섬유공학회지 Vol.13 No.1
In order to investigate the performance of high production card, some experiments were carried out on the fiber transfer rate, neps in the web and irregularity of card sliver with the various factor such as; density of metallic card clothing on the doffer, speed of cylinder, setting of flat and doffer, speed of doffer, weight of sliver, and micronaire value of cotton. As the results, the following conclusions were obtained; The density of metallic card clothing on the doffer and its speed were the most prominent factors on the fiber transfer rate. Large fiber transfer rate produced the cloudy web and it was thought that large fiber transfer rate brought less back doubling effect on the cylinder. When the speeds of cylinder were not increased. Within the range of present experiment, fiber transfer rate was not changed in accordance with the change of micronaire value.