Calculation of draft and twist in ring spinning textile. Highspeed gelspinning of ultrahigh molecular weight. Purchase advanced fiber spinning technology 1st edition. The rotor spinning machine is referred to as open end spinning, since there is a definite break in the fiber flow prior to the yarn. The principles of inserting real twist into an assembly of fibres are illustrated in fig. Cost analysis of spinning mills show raw materials, power. Today, some yarns are made through rotor or openended spinning. Ring spinning system is a conventional but most usable spinning system that is able to produce highest quality product at low production rate. Production calculation formula in spinning textile calculation. India received 12 august 1992 the new spinning technologies such as rotor, air jet and friction spinning have tremendous potential for hi gher productivity. Hok is calculated at each stage of production in a spinning mill. Full text of cotton spinning calculations and yarn costs.
Calculate the tpi on simplex if the diameter of back roller is 1516, rpm of b. Metal spinning design consideration and parameter of. A practical and comprehensive manual of calculations, yarn costs, and other data involved in adapting the. Quality requirements of the drywet spinning process. This process is suitable for producing noncircular, hollow components in small to mediumsized production lots. Asuperscript 6a6 brsuperscript 8 cotton spinning calculations and yarn costs. In this context, the question of higher production at each spinning sequence of machine gains importance. Formulas used for yarn spinning production including various yarn numbering system conversions. As the speed is higher than ring spinning, the produced yarns are coarser than ring spun yarns. Metal spinning, also called spun metal manufacturing is a manufacturing process that forms sheet metal into a cylindrical or circular shape. Fineness is expressed as fibre diameter in microns 0.
How to remember the settings count then write down the number of holes showing in the stem post, seat height post and fore and aft seat bar. The production of pan fibers, commercially in the form of copolymers, for over 50 years has been performed by wet spinning and dry spinning processes1,2. Engineering techniques of ring spinning by engineering techniques of ring spinning. Whenever the type of count is not mentioned with the count, it is understood. The change in yarn properties with progressive change in count has also been reported. Jan 04, 2015 spinning calculation1 production calculations q. Spinning calculations conversion of weight units o 1kg 2. The instructor arranges elements, such as those shown under the spinning elements section into a 45 to 60 minute program. Commonly used units in this system of measurement are. In 1981, the company used amine oxide as a new solvent spinto.
The most commonly used unit of time for production calculation is hour. Calculations of fivewheel and sevenwheel take up motion of loom. Computercontrolled facilities for continuous casting of metallic fibres and wires performing inrotating liquidspinning inrolisp and shape flow casting sfc were designed and installed to determine and control the nearnetshape casting processes over an extended production period. The production is usually calculated in the units of weighttime or lengthtime e. The spindle is driven usually at an angular velocity that is either constant or changes only slowly and the. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any sizereduction requirements including, spinning production formulas, quarry, aggregate, and different kinds of minerals. It is used for the measurement of length per unit weight of yarn. Pbs, values which are comparable to and even surpass those reported for human patellar and achilles tendons. Spinning basics page 2 of 7 main program now, the main part of the program begins. Calculations of hok in the case of a spinning mill of 17280 spindles producing 14157 kgms. Yarn calculations by samrat dewan linkedin slideshare.
Cost analysis of spinning mills show raw materials, power important factors today, the availability of cotton and synthetic staple fibers is not a problem. Quality requirements of the drywet spinning process analysis of raw materials, solutions andfibers frank wendler, birgit kosan, thomas schulze, frank meister centre of excellence for polysaccharide research, thuringian institute for textile and plastics research, breitscheidstr. Historically, the formation of fibres by dryspinning was the first to evolve as a method for manufacturing polymerbased fibres, as pointed out in chapter 3. Production the output of a mc per unit time is called its production. Aug 04, 20 the production is usually calculated in the units of weighttime or lengthtime e. Analysis on the spinning process and properties of tencel yarn. In this article just i want try to give production calculation formula in cotton spinning. Spinning basics page 4 of 7 height of handle bars adjust so the handle bars are level to slightly below the seat height. Production calculation of spinning is one of the principle tasks for production manager who is responsible in spinning floor. To improve the productivity of ring for 9 combed wool and 24 carded count the obtained results was ring frame efficiency percentage plotte d in figure no.
In 1830, another american scientist, jenk, contributed the traveler rotating on the ring. Calculate the tpi twist per inch produced on a simplex with diameter of front roller 28 mm and its rpm be 30. Maximum time textile engineers forget the common spinning production calculation formula. A practical and comprehensive manual of calculations, yarn costs. Calculate blow room production, if number of scutchers is 3,shell roll speed is rpm shell roll dia is 9, lap weight is 12ozyd, and efficiency is 85%. Kaoerzi company had started researching cellulose fiber production with nmmo solvent method since 1978. Aug 29, 2015 speed frame production calculation math 2. Prepare the production plan of a spinning mill with the given statically data while the yield age is 82 %, bale wt. Since each instructor does it differently, spinning programs vary considerably. Jul 16, 2011 this paper describes the peculiarities encountered in the numerical modeling of noncircular spinning processes using motioncontrolled roller tools and applying the finite element method fem. Asymmetric spinning in addition to being inflexible, conventional spinning is limited to production of axisymmetric parts. The count range has been seen to be dependent on fibre type.
Pallavaa group over 40 years of reliability, integrity and reverence in the spinning and weaving industry, initially focussing on the highend fashion fabric industry, now made available to the masses a revolution created by modern day brands. Production calculations production the output of a mc per unit time is called its production. Production planning function of the planning department. The spinning limit for three different fibres cotton, viscose rayon and polyester on a dref3 friction spinning machine has been investigated. It is used for the measurement of weight per unit length of yarn. Basic formulas used in spinning process sriyaditha textile. Simulations of multifilament spinning of pet fibers, based on a newtonian constitutive model, are described in 3, 4, and 5.
A typical melt spinning process involves casting molten. The basic mechanics of chiptype machining processes fig. Melt spinning is a metal forming technique that is typically used to form thin ribbons of metal or alloys with a particular atomic structure some important commercial applications of melt spun metals include highefficiency transformers amorphous metal transformer, sensory devices, telecommunications equipment, and power electronics. Simulation of multifilament semicrystalline polymer fiber.
In the present chapter, the solutionspinning processes will be briefly described. The yarn issuing from the drafting rollers passes through a threadguide, round a traveller that is free to rotate around a ring, and then onto a tube or bobbin, which is carried on a spindle, the axis of which passes through a center of the ring. Compared to ring spinning, rotor spinning offers higher productivity and so the production costs are much lower. The ring spinning machine was first invented in 1828 by the american thorp.
If the machine runs at 9% efficiency and twist multiplier is 4. Metal spinning manufacturing and design considerations. Chattopadhyay central institute for research on cotton technology, matunga, mumbai 400019, india received 23 aug 20, accepted 11 november 20, published on the web. In the present chapter, the solution spinning processes will be briefly described. So if the unit is not mentioned, it is understood to be a productionhr. The popularity of ring spinning technique can be depended to high yarn quality, adaptability of all fiber types spinning with very large scale of yarn fineness ne 6 to ne 250 as at the present. Request pdf improvement of overall equipment efficiency of ring frame through total productive maintenance. It is equal to the number of operative hours required to produce 100 kgms. In a ring frame 30 ne carded yarn is to be spun in which spindle speed is 17000 r. In 2014 season, for the third time in a row, the main production countries supplied more raw material than what was processed by spinning mills. Speed frame production calculation textile study center.
Production calculation of spinning is one of the principle tasks for production manager who is responsible in. Turns per inch of 19 to 20 is generally used by the spinners for spinning of 21 ne warp yarn. The formulae used for the calculation of the sn ratio for the above response types are given below. Thermal stabilization study of polyacrylonitrile s fiber. Metal spinning design consideration and parameter of spinning process and its terminology. Calculation of draft in ring spinning it is possible to achieve very high range of draft and twist on modern long spinning frames.
Fiber, fabric, finished products, and machinery manufacturing the previous chapter outlined broad themes affecting the industry complex that converts fiber into apparel and other end uses. A tool with a certain rake angle a positive as shown and relief angle moves along the surface of the workpiece at a depth t 1. This paper describes the peculiarities encountered in the numerical modeling of noncircular spinning processes using motioncontrolled roller tools and applying the finite element method fem. Calculation of size percentage and calculations related to cloth take up and crimp percentage. Wet spinning and drawing of human recombinant collagen. States, japan and other countries mainly for the production of high fashion. Engineering techniques of ring spinning textile study center.
Numerical simulation can be used to optimize the process. Smith faculty of agriculture, food and environment, and the center for nanoscience and nanotechnology, the hebrew university of jerusalem, p. The material ahead of the tool is sheared continuously along the shear plane,which makes. So if the unit is not mentioned, it is understood to be a production hr. These processes are based on the use of organic solvents that dissolve the pan polymer and a solution is formed.
Possibilities, applications and limitations k r salhotra department of textile technology. The average weight of one inch length of fibre, expressed in micrograms 0. Production calculation of ring frame textile calculation. Spinning capacity pallavaa group, erode 638 006, tamil. Efficiency it is the ability of a material to perform its task. Production calculation formula in spinning textile. The production technology is simple, based entirely on existing. Ring spinning machine or ring frame is used to produce required count of yarn from the supplied roving by the drafting. This chapter will examine the major segments of the industry in greater detail, addressing changes in both production tech. Standard test conditions included a drive speed of 1050 rpm, maximum hertz stresses from 48 000 to 384 000 psi 330x10 6 to 2650x10 nm 6 2, and ambient temperature i. Calculation of twist in ring spinning by changing the speed of the main pulley and adjustments in the twist change and auxiliary twist change gears wide range of twist can be achieved. Improvement of overall equipment efficiency of ring frame through. Box 12, jerusalem, israel institute of chemistry and the center for nanoscience and.
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