The srg3 will find applications in metrology and in experiments where high accuracy and repeatability are essential. In textile spinning sector, open ended spinning or break spinning is considered as rotor spinning. Here, total process flow chart is less than combed yarn as well as carded yarn. The quantity of production on rotor spinning has increased in recent years 9.
The yarn loop rotating rapidly about a fixed axis generates a surface referred to as balloon. Pdf the end breakage in rotor spinning not only reduces the running efficiency of the process, but also deteriorates the quality of the yarn in terms. The new gauge is rugged and will perform well under both working and transfer conditions. The influence of fibre friction, opening roller speed and sliver. Organic cotton a ber classication guide 6 staple length yarn count range length type ne nm tex short coarse 316 527 19737 medium medium 1744 2876 34. The whole process is exactly controlled by the spinning unit electronics. Process control in rotor spinning download ebook pdf.
Blow room at this process the fibres in bale form will be. There are various types of spinning methods for producing various types of yarn. The process sequence in rotor spinning includes feeding of input sliver, opening of fibres to the individualized stage, transportation of fibres up to the rotor groove, and insertion of twist and. Rieter is the worlds leading supplier of systems for shortstaple fiber spinning. Rotor direct process with rsb draw frame module on the card productive spinning with high shortfiber content the strength of the rieter rotor spinning system has always been its high productivity and achievement of a consistent yarn quality, particularly in applications with shorter fibers. The new spin box s 66 ensures high spinning stability and. The taguchi method and the anova technique are used to analyse the effect of process variables. Consolidation in rotor spinning is achieved by mechanical twisting.
This results in fewer weak points and fewer imperfections in the yarn. The regression models were also fitted to quantify the effect of speed frame, ring frame, rotor and airjet draft on the parameters mentioned above. Core spun mvs yarn courtesy of muratec covering fibers. The amount of twist turns per metre is determined by the ratio between the rotor speed rpm and the takeup speed metresmin. If we notice, we will see that the cotton fiber s are converted into carded yarn, combed yarn and rotor yarn. The spinning machine is the final machine for yarn production.
The spinning rotor viscosity guage has inherent long. Rotor spinning process consolidation in rotor spinning is achieved by mechanical twisting. The following aspects are decisive in this respect. Yarn spinning according to the rotor spinning principle predominates for all nonconventional spinning methods. Spinning method and the product continuity is maintained during the whole spinning process. Fully automatic rotor spinning machine r 66 rieter. Rotor spinning free download as powerpoint presentation. Effects of spinning conditions on convergent point in rotorspun compositeyarn spinning process.
The rotor spinner and a twodimensional view the rotor spinning machine consists of a rotor and a coagulator. The process sequence in rotor spinning includes feeding of the input sliver, opening of fibers to the individualised stage, transportation of fibers up to the rotor groove and insertion of twist and winding of yarn. The general principle of rotor spinning is shown in figure. Rotor spinning rotor spinning, also known as openend spinning, was developed in the 1970s and early 1980s. However, too high rotor speed may result in yarn imperfections and too low twist level may result in lower tenacity yarns.
The influence of ratio k f to the properties of yarn such as diameter of yarn, angle twist, strength, hairiness, yarn delivery, and also yarn twist will be discussed and. Rotor spinning, also known as openend spinning, was developed in the 1970s and early 1980s. The ring spinning machine is used in the textile industry to simultaneously twist staple fibers into yarn and then wind it onto bobbins for storage. Rotor spun yarn is more economical than ring spun yarn by virtue of its higher production rate and the condensed process involved in making the yarn i. The yarn obtained with this method has a carrier almost without twist, which is braided on the yarn surface. Rieter is the only supplier worldwide to cover spinning preparation processes as well as all four. Spinning is the first steps of textile product processing. The spinning wheels unit quality can directly effect the quality of spun yarn. Pdf effect of rotor spinning transfer channel modification on fiber. The influence of some process parametres on rotor spun. As a rule rotor spinning operates with normal draw frame sliver of a quality customary in spinning mills.
The principle behind openend spinning is similar to that of a clothes dryer spinning full of sheets. Critical rotating speed of rotor cup in an air suction. Request pdf yarn tension in the process of rotor spinning yarn tension is a phenomenon of fundamental importance for rotor yarn formation. Theoretical modeling for predicting the optimum twist. The aim of this study is to observe the effect of spinning parameters such as rotor diameter and speed on thick, thin places and neps of yarn in rotor spinning process. Use of taguchi method and grey relational analysis to. An openend rotor spinning machine having a plurality of work stations, wherein each work station comprises an openend spinning device for manufacturing a yarn, a winding device with a creel, a yarn traversing device for producing a cheese, a pivotably supported, vacuumchargeable suction nozzle, an individual drive for pivoting the suction nozzle between a yarn takeup position in the area. Process flow chart of rotor yarn manufacturing cotton. Ring spinning, the widely used yarn formation technique. The heart of the openend process is a rotor see exhibit 3, wherein fibers can be collected and then drawn off as a yarn. Basu, in process control in textile manufacturing, 20. Yarn tension was tested between the rotor and the delivery rollers, whereas sliver linear density was tested before the rotor, and yarn linear density between the delivery rollers and the takeup unit. For example, rotorspun yarns have low tensile strengths due to their structure, and successful rotor spinning is still restricted to the coarseand mediumcount range.
These steps of processing are carried out in the blow room of a spinning mill. Impact of different stages of spinning process on fibre orientation and properties of ring, rotor and airjet yarns. The lightweight design utilized a new and unfamiliar material inconel 718 and a relatively undeveloped electronbeam welding process. The torque generating the twist in the yarn is applied by the rotation of the rotor. The properties of the yarns with respect to strength and strength variation, extension at break, and shortterm yarn evenness are discussed. The basic principle of open end yarn formation a constant stream of separated, individual fibers is allowed to flow to a rotating yarn end. Results of studies are examined the effect of cleaning intensity,cylinder spee d. By extensive experiment, trommer has found that the limitation 8 of the ratio of rotor diameter to fiber length is more than 07. This device ensures that the fibers are beaten into a thin supply which enters a duct and gets deposited on. Openend spinning requires fewer steps than ring spinning, because roving is not needed, and a full.
Sliver from the card goes into the rotor, is spun into yarn and comes out, wrapped up on a bobbin, all ready to go to the next step. Critical rotating speed of rotor cup in an air suction openend spinning machine show all authors. The influence of rotor speed, rotor groove, type of navel and winding tension on yarn property and spinning performance, and concludes spiral groove and plain smooth navel give better yarn quality and grooved navel gives better spinning performance in coarse counts. With the model, they hope to gain insight into the process. Impact of different stages of spinning process on fibre. It discusses the openend spinning machine rotors vibrations and bearings as well as the kinematics of the rotors drive as individual drive or central drive, both as a reducing drive and multiplying drive.
Rotor spinning was the first process that was capable of producing a crosswound package ready for processing or sale in a single process stage from a draw frame sliver. This is a process in which a filament or staple yarn is fed behind the front roll of the drafting system and covered or wrapped with another fiber during the spinning process. Rotor spinning process is fully different from carded or combed spinning. One important point should be pointed out here that, roving formation in simplex machine is not needed in rotor spinning where drawn slivers are fed to the machine directly. This is made possible by the new geometry of the spin box without takeoff tube. Effect of spinning parameters on thick, thin places and. Rotor spun yarns from recycled cotton spinning wastes were manufactured by means of rotor spinning process and tested for yarn imperfections and strength. The torque generating the twist in the yarn is applied by the rotation of the rotor with respect to the point of the yarn contacting the rotor navel. Away from the test bench, the mks spinning rotor gauge may also be used in situ on a process chamber to assure high vacuum gauge reading accuracy and tooltotool consistency.
Airjet spinning of cotton yarns cotton incorporated. The control of the single feeding applies know how from automated piecing to improve the. Rotor spinning working principle linkedin slideshare. The turbine rotor assembly tested in this program was designed by the aerojetgenera1 corporation under contract to the national aero nautics and space administration. If you could open the door and pull out a sheet, it would spin together as you pulled it out.
The spinning process is far more stable and the yarn strength higher. Click download or read online button to get process control in rotor spinning book now. Mechanics of rotor spinning machines crc press book. This provides repeatable process results, high uptime and optimum cycle times. After drafting, the sliver is fed into a rotary beater. Most of rotor yarn count is below 20 s but highest yarn count may be 40 s. High spinning productivity can be obtained by keeping the rotor speed high and twist level as low as possible. The first functioning of rotor spinning, machine was presented at the itma in 1967. Although rotor spinning is now a wellestablished manufacturing process, there are problems that must be solved if the full potential of this method of spinning is to be exploited. Have students compare the flight of the rotor motors to that of a maple seed or a dandelion.
The simplicity and accuracy of operation should offer. Mathematical models for a rotor spinning process interim. This book explores the mechanics of rotor spinning machines. Despite the obvious merits of using ring spun yarns in making denim fabrics, rotor spun yarns have taken the largest market share for many years, particularly in the us market. For the production of cotton blends, airjet spinning may be used. Yarn tension in the process of rotor spinning request pdf. With the new robot robodoff, automatic package change without interrupting the spinning process is now also possible on the r 37. Finally, the optimization of rotor machine variables to process synthetic fibres and blends is dealt with. The system spins yarn directly from slivers, using a spinning rotor and a withdrawal system that imparts false twist to form the fibers into a yarn. The market leader develops and manufactures machinery, systems and components.
The process of making yarns from the textile fiber is called spinning. The spinning wheels unit is a key component in rotor spinning machine. This site is like a library, use search box in the widget to get ebook that you want. Compared to the fully automated rotor spinning machine r 70 with the latest technology, the r 37 is specifically designed for economical production with manual support. Openendrotor spinning an overview sciencedirect topics. Ring spinning openend spinning bobbin rotates constantly for insertion of twist spool does not need to be rotated to insert twist cannot handle spools of bigger size much larger spools can be wound can spin finer yarns 35 times faster than ring spinning uniform and strong yarn uniform but flexible yarn with better dye ability. Spinning of synthetic fibres and blends on rotorspinning. This domination largely stemmed from the following reasons. Critical rotating speed of rotor cup in an air suction openend spinning machine. Now a days, rotor spinning system is rising due to the considerable reduction in space and personnel 10 11. Pdf optimization of process variables in rotor spinning for the. A sliver may have more than 20,000 fibers in its crosssection. Spinning machines an overview sciencedirect topics. Mechanics of rotor spinning machines download ebook pdf.
Rotor speed and twist per metres tpm are two key parameters in openend rotor spinning of cotton yarns. Click download or read online button to get mechanics of rotor spinning machines book now. The mvs spinning frame has corespinning capability. The fully automatic rotor spinning machine r 66 sets the standard for quality and productivity. Textile spinning process of cotton yarn textile learner. Highspeed openend rotorspinning is discussed in relation to the properties of yams spun in the speed range from 30,000 to 100,000 revmin. To provide a more economical spinning system than conventional ring spinning through higher productivity, and to produce yarn of a quality that matches or surpasses that of the conventional ring spinning. This means that a yarn of 100 fibers per crosssection will require a total draft.
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