International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: 06 75

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1 International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: Optimization of Doubling at Draw Frame for Quality of Carded Ring Yarn A. Subrata Kumar Saha, B. Jamal Hossen Lecturer, Department of Textile Engineering Ahsanullah University of Science and Technology 11-12, Love Road, Tejgaon I/A, Dhaka-1208, Bangladesh Abstract-- Sliver has a huge impact on yarn quality parameter like evenness, imperfection index,, of yarn. In general means the increase in weight per unit length. Doubling is a process used in yarn manufacturing by which a single product is from a several intermediate feed product. The study was performed on 0.12 hank card sliver which was used to produce 2/1 Ne carded yarn. At first the number of in the breaker and finisher ing was 6, 7, and 8 respectively. The paper is to find out whether the change of number of has any effect on yarn quality or to find out the suitable number of sliver in passage 1 and passage 2. Index Term-- Doubling, Draft, Hairiness, count, unevenness, imperfection index. I. INTRODUCTION In processing in the spinning mill, the unevenness of the product increases from stage to stage after the. There are two reasons for this. Firstly the number of fibres in the section steadily decreases. Uniform arrangement of fibres becomes more difficult because of their smaller number. Secondly each drafting operation increases the unevenness. Each processing stage is a source of faults. Drafting arrangements, in particular increase unevenness considerably. In order, finally, to achieve a stable yarn the process must include operations that give an equalizing effect. These can be, leveling, and ing [1]. In general means the increase in weight per unit length [1]. Doubling is a process used in yarn manufacturing by which a single product is from a several intermediate feed product. For example, sliver where to 8 slivers are fed to and 1 sliver is delivered. On the other hand, draft is to reduce the linear density of a fibrous assembly by ing. This process is called drafting and drafting operation increases the unevenness []. The function of is to provide and ing at the same time. The paper is to find out whether the change of number of has any effect on yarn quality or to find out the suitable number of sliver in passage 1 and passage 2.The entire question leads us to this experiment. II. DOUBLING Doubling is very important for equalizing. This means well distribution of different fibres with their same or different properties all along the length of the delivery sliver. The main purpose of is blending and elimination of mass variation of the delivery sliver [1]. Mass variation is reduced if there are a few thick places and some amount of thin places in the same zone. If this kind of set up does not arise the task of elimination of mass variation completely depends on the auto leveler [3]. Blending also improved by because cans from different carding machines are fed to a breaker and cans of different breaker are fed to different finisher [5]. Thus a very good blending of fibre can be achieved. When and ing are combined, the input materials are doubled to reduce the long-term errors; however, new errors of shorter wavelengths are added as a result of the process of elongation. There is an exchange of relatively long-term for short-term error [6]. III. MATERIAL AND METHOD In modern installation, the raw material is supplied via ducting pipe into the feed chute of the carding machine. The carding machine produces card sliver. Then the card sliver cans are fed to the breaker. The breaker sliver cans are then fed to the finisher. In breaker and finisher different numbers of s was used and for each sample roving in simplex machine were made and finally yarn was made in ring. After producing yarn we test the quality of yarn. IV. EXPERIMENTAL PROCEDURE In this work card sliver was collected from carding machine. The card cans were then fed to the breaker, once for 6, once for 7 and once for 8. 8 cans for each set of were prepared. Then those slivers were fed to the finisher. The target is to get finisher sliver made from 6, 7 and 8. Those above mentioned sliver from each set of breaker sliver were prepared. Finally 90 cans finisher n sliver of 9 different were achieved. Then one simplex were selected for roving making. There are 9 samples each having 10 cans. Spindle no 111 to 120 of simplex machine were used for sample 1. For every sample those same spindles of same simplex machine we used. In one particular ring, from spindle no-601 to 610 the roving for each samples were fed. Finally 90 ring bobbins in 9 different samples each sample has 10 bobbins were made. Than tested those samples with the help of Uster tester-5. Different colour of can, belt, and sliver band, bobbin for separate different can, roving and ring yarn were used.

2 International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: V. DATA ANALYSIS of sliver in breaker of breaker cans Table I Process summary of sliver in finisher of finisher cans of roving (bobbins) of yarn (cops) sliver in breaker Table II Uster tester result for breaker sliver: of sliver in breaker Table III Uster tester result for finisher sliver: of sliver in finisher Sample of sliver in breaker Table IV Uster tester result for roving: of sliver in finisher

3 U % International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: Sample Numbe r of sliver in breaker Table V Uster tester result for 2/1 Ne carded ring yarn: of sliver in finisher Cvm % Thin (- 50%) Thick (+50% ) Neps (+200 %) IPI Hair iness VI. RESULT AND DISCUSSION of in breaker U % Fig. 1. of carded sliver Vs different number of in breaker of in breaker Cv% Fig. 2. of carded sliver Vs different number of in breaker From Figure 1 & 2, it is observed that & of card sliver shows an increasing trend when the number of increase. The main reason of this increasing trend is when number of were increased the feed material weight increases but delivery material weight is needed to remain same. So breaker draft is increased and that increases the and of sliver Fig. 3. of carded sliver Vs different number of combination sample in finisher

4 International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: Fig.. of carded sliver Vs different number of combination sample in finisher From Figure 3 &, it is observed that & of card sliver in finisher shows a decreasing trend when the number of in finisher increases (sample no 1 to3, to 6, 7 to 9 ). The main reason of this decreasing trend is finisher has auto leveller. It reduces the unevenness of sliver with the increment of number of Fig. 5. of carded roving Vs different number of combination sample in simplex machine Fig. 6. of carded roving Vs different number of combination sample in simplex machine From Figure 5 & 6, it is observed that & of card roving in roving shows a decreasing trend when the number of in finisher increases (sample no 1 to3, to 6, and 7 to 9). Sample 3 shows the best result Fig. 7. of carded yarn Vs different number of combination sample in ring

5 Hairiness% IPI% International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: From Figure 7 it is observed that of carded yarn at ring shows a decreasing trend when the number of in finisher increases (sample no 1 to3, to 6, and 7 to 9). Sample 6 shows the best result Fig. 8. of carded yarn Vs different number of combination sample in ring From Figure 8, it is observed that of carded yarn shows a decreasing trend when the number of in finisher increases (sample no 1 to3, to 6, and 7 to 9). Sample 5 shows the best result IPI% Fig. 9. Yarn imperfection index (IPI) of carded yarn Vs different number of combination sample in ring From Figure 9, it is observed that imperfection index (IPI) of carded yarn shows a decreasing trend when the number of in finisher increases (sample no 1 to3, 7 to 9). Sample 3 shows the best result Hairiness% Fig. 10. Hairiness of carded yarn Vs different number of combination sample in ring From Figure 10, it is observed that hairiness of carded ring yarn shows a decreasing trend when the number of in finisher increases (sample no 1 to3, to 6). Sample 3 shows the best result. VII. CONCLUSION This experiment shows that sample no-3 means six in breaker and eight in finisher is a good combination of in carded ring yarn production. Considering and sample-3 does not show the best result. The and value of other sample are very close to sample-3 value. In case of yarn quality main parameter is yarn imperfection index (IPI). In 6-8 combination yarn imperfection index (IPI) is lower. In the yarn test result considering IPI and hairiness it is clearly seen that 6-8 combination is the best. A

6 International Journal of Engineering & Technology IJET-IJENS Vol: 11 No: spinning mill which is looking for very good quality yarn should try this setup. REFERENCES [1] Klein W., Manual of Textile Technology, The Textile Institute. ISBN [2] Pattabhiram T. K., Essential Elements of Practical Cotton Spinning, Somaiya Publications Pvt. Ltd. Mumbai, New Delhi. [3] Lawrence, Ph.D. Carl A. Fundamentals of Spun Yarn Technology. Library of Congress Cataloging-in-Publication Data, ISBN (alk. paper) [] Mohammed Rubaiyat Chowdhury, Effect of numbers on sliver and yarn quality, The AUST Journal of Science and Technology, vol.-1, Issue-2, July, 2009, pp [5] Akshay Kumar, S M Ishtiaque, Impact of different stages of spinning process on fibre orientation and properties of ring, rotor and air-jet yarns, Indian Journal of Fibre & Textile Research, vol.-33, December. 2008, pp [6] Peter R. Lord, Handbook of yarn production, The Textile Institute. ISBN