Rotor spinning process pdf

Critical rotating speed of rotor cup in an air suction. The spinning wheels unit is a key component in rotor spinning machine. Critical rotating speed of rotor cup in an air suction openend spinning machine show all authors. Click download or read online button to get process control in rotor spinning book now.

Impact of different stages of spinning process on fibre orientation and properties of ring, rotor and airjet yarns. This means that a yarn of 100 fibers per crosssection will require a total draft. Click download or read online button to get mechanics of rotor spinning machines book now. Finally, the optimization of rotor machine variables to process synthetic fibres and blends is dealt with. 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 torque generating the twist in the yarn is applied by the rotation of the rotor. The design of the rotor and its modified driving unit is described in detail. The fully automatic rotor spinning machine r 66 sets the standard for quality and productivity.

Rotor spinning, also known as openend spinning, was developed in the 1970s and early 1980s. Basu, in process control in textile manufacturing, 20. 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. This domination largely stemmed from the following reasons. Rotor spinning process consolidation in rotor spinning is achieved by mechanical twisting. However, too high rotor speed may result in yarn imperfections and too low twist level may result in lower tenacity yarns. Highspeed openend rotorspinning is discussed in relation to the properties of yams spun in the speed range from 30,000 to 100,000 revmin. Rotor spinning working principle linkedin slideshare. 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. The taguchi method and the anova technique are used to analyse the effect of process variables. The yarn loop rotating rapidly about a fixed axis generates a surface referred to as balloon.

The spinning wheels unit quality can directly effect the quality of spun yarn. Pdf optimization of process variables in rotor spinning for the. Openendrotor spinning an overview sciencedirect topics. Openend or carded or break or rotor spinning textile school. The regression models were also fitted to quantify the effect of speed frame, ring frame, rotor and airjet draft on the parameters mentioned above. Impact of different stages of spinning process on fibre. Critical rotating speed of rotor cup in an air suction openend spinning machine. This book explores the mechanics of rotor spinning machines.

Rotor spinning process for rotor yarn9 rotor yarn open end. Openend spinning requires fewer steps than ring spinning, because roving is not needed, and a full. The control of the single feeding applies know how from automated piecing to improve the. Faster production methods include rotor spinning a type of openend spinning, in which fibres are detached from the card sliver and twisted, within a rotor, as they are joined to the end of the yarn. There are various types of spinning methods for producing various types of yarn. 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.

Request pdf yarn tension in the process of rotor spinning yarn tension is a phenomenon of fundamental importance for rotor yarn formation. Use of taguchi method and grey relational analysis to. 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 lightweight design utilized a new and unfamiliar material inconel 718 and a relatively undeveloped electronbeam welding process. The amount of twist turns per metre is determined by the ratio between the rotor speed rpm and the takeup speed metresmin. 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 ring spinning is the most widely used form of the spinning machine due to significant advantages in comparison with the new spinning processes. The mvs spinning frame has corespinning capability. The influence of some process parametres on rotor spun.

The general principle of rotor spinning is shown in figure. Rieter is the only supplier worldwide to cover spinning preparation processes as well as all four. With the model, they hope to gain insight into the process. For the production of cotton blends, airjet spinning may be used. Rotor spinning rotor spinning, also known as openend spinning, was developed in the 1970s and early 1980s. Spinning method and the product continuity is maintained during the whole spinning process. The heart of the openend process is a rotor see exhibit 3, wherein fibers can be collected and then drawn off as a yarn. Textile spinning process of cotton yarn textile learner.

Core spun mvs yarn courtesy of muratec covering fibers. Fully automatic rotor spinning machine r 66 rieter. If you could open the door and pull out a sheet, it would spin together as you pulled it out. 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. The properties of the yarns with respect to strength and strength variation, extension at break, and shortterm yarn evenness are discussed. The yarn obtained with this method has a carrier almost without twist, which is braided on the yarn surface. 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 site is like a library, use search box in the widget to get ebook that you want. Spinning of synthetic fibres and blends on rotorspinning. The spinning machine is the final machine for yarn production.

Here, total process flow chart is less than combed yarn as well as carded yarn. Airjet spinning of cotton yarns cotton incorporated. Consolidation in rotor spinning is achieved by mechanical twisting. The new gauge is rugged and will perform well under both working and transfer conditions.

The following aspects are decisive in this respect. The simplicity and accuracy of operation should offer. 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. The quantity of production on rotor spinning has increased in recent years 9. This provides repeatable process results, high uptime and optimum cycle times. 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. With the new robot robodoff, automatic package change without interrupting the spinning process is now also possible on the r 37. Figure 3 shows the composition of a core spun yarn. Rotor spun yarns from recycled cotton spinning wastes were manufactured by means of rotor spinning process and tested for yarn imperfections and strength. 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. The turbine rotor assembly tested in this program was designed by the aerojetgenera1 corporation under contract to the national aero nautics and space administration. By extensive experiment, trommer has found that the limitation 8 of the ratio of rotor diameter to fiber length is more than 07. For example, rotorspun yarns have low tensile strengths due to their structure, and successful rotor spinning is still restricted to the coarseand mediumcount range. The first functioning of rotor spinning, machine was presented at the itma in 1967.

The influence of fibre friction, opening roller speed and sliver. The whole process is exactly controlled by the spinning unit electronics. Process flow chart of rotor yarn manufacturing cotton. Rieter is the worlds leading supplier of systems for shortstaple fiber spinning. In textile spinning sector, open ended spinning or break spinning is considered as rotor spinning. After drafting, the sliver is fed into a rotary beater. Results of studies are examined the effect of cleaning intensity,cylinder spee d. Mechanics of rotor spinning machines crc press book. 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. These steps of processing are carried out in the blow room of a spinning mill. 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. Now a days, rotor spinning system is rising due to the considerable reduction in space and personnel 10 11.

If we notice, we will see that the cotton fiber s are converted into carded yarn, combed yarn and rotor yarn. 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. Have students compare the flight of the rotor motors to that of a maple seed or a dandelion. Yarn spinning according to the rotor spinning principle predominates for all nonconventional spinning methods. Mathematical models for a rotor spinning process interim. Effects of spinning conditions on convergent point in rotorspun compositeyarn spinning process. Rotor spinning free download as powerpoint presentation. 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. Process control in rotor spinning download ebook pdf. The rotor spinner and a twodimensional view the rotor spinning machine consists of a rotor and a coagulator. As a rule rotor spinning operates with normal draw frame sliver of a quality customary in spinning mills.

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. The principle behind openend spinning is similar to that of a clothes dryer spinning full of sheets. 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. Theoretical modeling for predicting the optimum twist. The machine is fed with a sliver that is delivered by either a combing machine or a draw frame.

This is made possible by the new geometry of the spin box without takeoff tube. The spinning rotor viscosity guage has inherent long. 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. 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 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. High spinning productivity can be obtained by keeping the rotor speed high and twist level as low as possible. 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. Rotor spinning process is fully different from carded or combed spinning.

The market leader develops and manufactures machinery, systems and components. This results in fewer weak points and fewer imperfections in the yarn. Rotor speed and twist per metres tpm are two key parameters in openend rotor spinning of cotton yarns. A sliver may have more than 20,000 fibers in its crosssection. Spinning is the first steps of textile product processing. This device ensures that the fibers are beaten into a thin supply which enters a duct and gets deposited on. Mechanics of rotor spinning machines download ebook pdf. 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. Effect of spinning parameters on thick, thin places and. The srg3 will find applications in metrology and in experiments where high accuracy and repeatability are essential. Ring spinning, the widely used yarn formation technique. Yarn tension in the process of rotor spinning request pdf.

Spinning machines an overview sciencedirect topics. 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. Most of rotor yarn count is below 20 s but highest yarn count may be 40 s. 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. The process of making yarns from the textile fiber is called spinning.

Pdf effect of rotor spinning transfer channel modification on fiber. The spinning process is far more stable and the yarn strength higher. The basic principle of open end yarn formation a constant stream of separated, individual fibers is allowed to flow to a rotating yarn end. 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. The new spin box s 66 ensures high spinning stability and.

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