End breakage in ring frame pdf

front and back rows of the speed frame in different ring frames. Figure 5: Thread path geometry at flyer top 3. BREAKAGE RATE The productivity of the speed frame suffers due to the end breaks. The control of end breaks is thus of the utmost importance. Most of the breaks occur within the flyer, and The changes needed to the ring spinning frame to produce Sirospun yarns are thus a double creel (for twice the number of roving packages), a double set of roving guides, a wider middle (apron) roller recess, modified front-zone condensers (if used), and the break-out device (Fig. 8.4). The yarn count per spindle is doubled and the amount of This helps to reduce the end breakage rate in the ring frame process. • The back top rollers are coated with hard rubber generally because compact and twisted roving enters the back roller which does not need extra guidance and fibres control. The hardness of rubber cots is kept 80 - 85 degrees shore in the back front roller. This project is totally related with maintenance. Before taken action the ring frame efficiency was 88%. And production of the department at 88% efficiency is 299.27 kg/shift for 1 m/c. Then after reducing the doffing time, gripper failure & end breakage rates the m/c efficiency increases to at 91% there is 3% improvement in effic different factors, such as residual trash in draw frame sliver, rotor speed, opening roller speed and yarn count on the end breakage rate and proportion of different types of breakage. Materials and Methods A medium grade cotton was used in the study. The cotton fibres were processed through a blow room, carding and two passages of draw frame. Spinning end breaks As the yarn is wound onto the bobbin it is under tension. A component of this tension is the force required to move the traveller against the friction between the ring and the traveller. It causes ends breakage. Recent development of Ring frame: Automation in ring frame. Automatic doffing system can occur. Automatic drafting system can occur. It can do automatic data collection. High spindle gauge. (41mm, 43mm) Drafting ring is high up to 200. Direct to ply yarn-spinning system. Lubricated balloon can control ring. (1947). SOME FACTORS AFFECTING END BREAKAGE IN RING SPINNING. Journal of the Textile Institute Proceedings: Vol. 38, No. 12, pp. P561-P575. In the performances are given in Table 4 along with the present work, an attempt has been made to optimize square of correlation coefficients. ring frame process parameters, viz. spindle speed, top 3.1 End Breakage Rate roller pressure and traveller mass, to achieve better The contour diagrams (Fig. 1) show the influence yarn quality and product yarn breakage in ring spinning. In general, the tension test includes a contact measurement method and a non-contact measurement method.9-11 For the contact measurement method,12-14 the running length of yarn interacts with an external device that is in conjunction with the ring frame, which measures the resulting impacts due to the interaction 34/1 Ne carded slub yarn is made from ring frame where slub attachment was mounted. Then ring cops of slub yarns are tested by Uster-5 and the result of slub yarns are analyzed and U%, CVm%, Thin (−50%), Thick (+50%), Hairiness, end breakage% lub yarn slub length, slub thickness, slub/meter and pause s length measured by Uster-5 and manually Effective permissible end breaks / 100 spindle hours = 125 n − 30 c where n = number of