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Industrial texturing nozzles are reviewed and categorized in two groups, either as converging-diverging or cylindrical type nozzles. A mathematical model is developed for the complex airflow in cylindrical type texturing nozzles, and experimental data obtained from various nozzles verify the flow predicted by this model.
Get PriceAir flow in yarn texturing nozzles . By Memis Acar (1248636), R.K. Turton (7206659) and Gordon R. Wray (7206662) Abstract. The air-jet texturing process, a purely mechanical means of texturing continuous filament yarns, is described. Industrial texturing nozzles are reviewed and categorized in two groups, either as converging-diverging or ...
Get Price2015-3-1 · Early texturing nozzle had an axial yarn feed while the compressed air was admitted to the nozzle body through a side entry. It also had an impact element of a flat plate type. Nevertheless, the lack of aerodynamic design of the inner configuration caused tremendous losses to the air flow resulting in inefficient texturing.
Get Price2016-7-20 · 2 Air Texturing Jets Industrially used air texturing jets, also referred to as nozzles, can be categorized (depending upon their internal design and construction) into two main groups: (i) converging and diverging type air texturing jets in which a converging-diverging flow duct (nozzle) is attached to the yam exit end of the jet
Get Price2020-4-22 · There is a lack of understanding of the air-texturing mechanism, and the existing postulated explanations fail to provide a satisfactory explanation of how the loop formation is achieved. The air-flow in the standard-core HemaJet was investigated by experimental means in order to gain a better understanding of the flow in these nozzles.
Get Pricein texturing nozzles theoretically and developed a mathe- matical model of air-jet the flow through cylindrical nozzles, which was verified by experimental results. ... Turton, R. K., and Wray, G. R., Air Flow in Yarn Texturing Nozzles, Trans ASME, J. Engng Indust., 109(3), 197– explains the dual role of water in air-jet texturing …
Get Pricetemperature of the air entering the receiver holes; the present study is concerned mainly with the heat transfer at the disc surface. Karabay et al (2001) carried out a combined experimental and computational study of flow in a “cover-plate” pre-swirl system. The cooling air from the stationary pre-swirl nozzles flowed
Get Price2018-3-2 · Air-Texturing: The major exhibitors of air-texturing machinery at ITMA 2003 in Birmingham U.K were Dietze & Schell Maschinenfabrik GmBH, Germany and SSM Staehle Eltex GmBH, Germany. Dietze & Schell presented their DS 60, DS 90 E, DS 60 D and DS 90 MFB air-texturing units. All of them are primarily designed to texture glass fibers and artificial ...
Get PriceCiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract:For further improvements in efficiency and performance of gas turbines, the secondary air system, i.e. the required cooling mass flow, plays an important role. The pre-swirled secondary air supply is a common method in the aero industry and is a promising option for heavy- duty gas turbine …
Get PriceScientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. Advantages in terms of availability, coverage, timeliness, and efficiency. Isaac Councill and C. Lee Giles.
Get Price2016-7-20 · 2 Air Texturing Jets Industrially used air texturing jets, also referred to as nozzles, can be categorized (depending upon their internal design and construction) into two main groups: (i) converging and diverging type air texturing jets in which a converging-diverging flow duct (nozzle) is attached to the yam exit end of the jet
Get Price2018-6-16 · The factors affecting loop formation are analysed in the light of the mechanism described. This mechanism of loop formation is claimed to be valid for all types of texturing nozzle because the underlying requirement to create a supersonic, turbulent, and non-uniform flow is common to all satisfactory air-jet texturing nozzles.
Get Price1991-9-1 · , A Basic Understanding of the Air Flow in Texturing Nozzles (in German), Melliand Textilber. 69 (4), 233-241 and E 126-129 ( 1988). Google Scholar Demier, A. , Acar, M. , and Wray, G.R. , Air-jet Textured Yarns: The Effect of Process and Supply Yarn Parameters on the Properties of Textured Yarns , Textile Res. J. 58 (6), 318 - 328 ( 1988 ).
Get Price1990-5-1 · Acar, M., Turton, R. K., Wray, G. R. Air flow in yarn texturing nozzles Trans ASME, J. Engng Industry, ... An analysis of the air-jet yarn texturing process, Part IV: Fluid forces acting on the filaments and the effects of filament cross-sectional area and shape J. Textile Inst, ...
Get PriceCorpus ID: 56069431. Grundsatzliches zur Lufstromung in Texturierdusen (A basic understanding of the air flow in texturing nozzles) @inproceedings{Demir1988GrundsatzlichesZL, title={Grundsatzliches zur Lufstromung in Texturierdusen (A basic understanding of the air flow in texturing nozzles)}, author={A. Demir and M. Acar and R. K. Turton}, year={1988} }
Get Price2018-3-2 · Air-Texturing: The major exhibitors of air-texturing machinery at ITMA 2003 in Birmingham U.K were Dietze & Schell Maschinenfabrik GmBH, Germany and SSM Staehle Eltex GmBH, Germany. Dietze & Schell presented their DS 60, DS 90 E, DS 60 D and DS 90 MFB air-texturing units. All of them are primarily designed to texture glass fibers and artificial ...
Get Price2018-4-24 · A numerical approach to predict the yarn interlacing frequency of triangular interlacing nozzle is discussed in this paper. The inviscid, compressible flow field inside air nozzles is computed through solving the steady continuity, momentum and energy equations with a finite volume method.
Get PriceComputations have been performed with single-phase water and air, and two-phase mixtures in a range of Reynolds number (considering all-liquid flow) from 1000 to 12000 3 2 and flow quality from1.9 10 to 1.6 10. The contraction loss coefficients are found to be different for single-phase flow of air and water.
Get PriceThe mean flow has different upstream circulations. The vortices at the intakes are defined by the first observation of a persistent surface separation wave which appears at the surface downstream of the intake. The potential flow solution for the combination of a point sink and a uniform flow …
Get PriceThe factors affecting loop formation are analysed in the light of the mechanism described. This mechanism of loop formation is claimed to be valid for all types of texturing nozzle because the underlying requirement to create a supersonic, turbulent, and non-uniform flow is common to all satisfactory air-jet texturing nozzles.
Get PriceThe air-jet texturing (AJT) and intermingling (INT) processes are two applications of air jets used to modify the structure of synthetic multifilament yarns. ... which are created by purpose designed nozzles. The present work experimentally investigates the interrelation between properties of the yarn produced and air flow and the nozzle ...
Get Price2018-6-16 · The factors affecting loop formation are analysed in the light of the mechanism described. This mechanism of loop formation is claimed to be valid for all types of texturing nozzle because the underlying requirement to create a supersonic, turbulent, and non-uniform flow is common to all satisfactory air-jet texturing nozzles.
Get Price2018-3-2 · Air-Texturing: The major exhibitors of air-texturing machinery at ITMA 2003 in Birmingham U.K were Dietze & Schell Maschinenfabrik GmBH, Germany and SSM Staehle Eltex GmBH, Germany. Dietze & Schell presented their DS 60, DS 90 E, DS 60 D and DS 90 MFB air-texturing units. All of them are primarily designed to texture glass fibers and artificial ...
Get Pricenozzle structure on the yarn suction performance, we designed 16 nozzles, determined yarn suction force F, mass flow rate of compressed air G and analyzed yarn suction efficiency , which is defined as the ratio of F to G. The rational geometrical parameters are obtained as follows: the number of jet orifices N¼3, jet orifice diameter d¼1.6mm, jet
Get PriceA numerical approach to predict the yarn interlacing frequency of triangular interlacing nozzle is discussed in this paper. The inviscid, compressible flow field inside air nozzles is computed through solving the steady continuity, momentum and energy equations with a finite volume method. A mathematical model for the prediction of yarn interlacing frequency of air nozzle is proposed, …
Get PriceThe experimental study presented here seeks to compare air flow characteristics and texturing data for nine nozzles under realistic texturing conditions as a basis for an improved understanding of ...
Get Price2008-12-1 · After a brief description of the air-jet texturing process, the historical development of industrial texturing nozzles is summarized, and a critical review is given of previous investigations that have been directed to an understanding of the texturing process.It is argued that many of the previous hypotheses were based on a technology that used pre-twisted supply yarns and that …
Get PriceYarn texturing nozzle: 1987-09-08: Burkhardt et al. 4641504: Yarn heating chamber: 1987-02-10: Runkel et al. 28/272: 4565524: Sealed yarn heating chamber: 1986-01-21: Runkel et al. 28/272: 4560347: Yarn heating chamber: 1985-12-24: Runkel et al. 28/272: 4529378: Heating chamber for processing advancing yarn: 1985-07-16: Runkel et al. 28/272 ...
Get PriceIt contains an account of the theory of air texturing together with a detailed description of the machine. Also included are machine specifications, speed relationships, production calculations testing and fault finding. ... description air nozzles theory of air flow loop formation stabilizing zone yarn take up compressed air speed ...
Get Price2018-6-16 · The factors affecting loop formation are analysed in the light of the mechanism described. This mechanism of loop formation is claimed to be valid for all types of texturing nozzle because the underlying requirement to create a supersonic, turbulent, and non-uniform flow is common to all satisfactory air-jet texturing nozzles.
Get Price2021-8-22 · 'A Study of Air - Jet Texturing Nozzles : The Effects of Nozzle Configuration on the Air Flow,' Trans- actions of the ASME, Journal of Engineering for Indus- try, 112, pp.97-104., (1990). Effect of feed yarn parameters on air-jet textured yarn properties
Get Price2018-3-2 · Air-Texturing: The major exhibitors of air-texturing machinery at ITMA 2003 in Birmingham U.K were Dietze & Schell Maschinenfabrik GmBH, Germany and SSM Staehle Eltex GmBH, Germany. Dietze & Schell presented their DS 60, DS 90 E, DS 60 D and DS 90 MFB air-texturing units. All of them are primarily designed to texture glass fibers and artificial ...
Get Price1.6.1 Principle of air-jet texturing The processes of air-jet texturing are illustrated schematically in figure 1; When overfed (V1 > V2) filaments enter the texturing nozzle, they are carried along through the nozzle, blown out from the texturing end, and are formed into loops which are mutually trapped in the yarn structure by the effect of ...
Get Price2008-12-1 · After a brief description of the air-jet texturing process, the historical development of industrial texturing nozzles is summarized, and a critical review is given of previous investigations that have been directed to an understanding of the texturing process.It is argued that many of the previous hypotheses were based on a technology that used pre-twisted supply yarns and that …
Get PriceA method of air jet texturing is described wherein the intensity of texturing is proposed to be increased in that an air flow exceeding Mach 2 is obtained by the design of the nozzle duct. The total opening angle of the nozzle duct (11) directly in front of the texturing zone is designed to be greater than the ideal Laval angle with an effective length which is preferably a multiple of the ...
Get PriceBACKGROUND OF THE INVENTION. The present invention relates to an apparatus for texturing a synthetic yarn. Yarn nozzles are known from German DE-C 36 34 749 and corresponding to U.S. Pat. No. 4,796,340 and wherein the yarn nozzle is provided with a yarn duct which is supplied with hot air and terminates in an expansion chamber which has a larger cross section than the yarn …
Get PriceAir texturing up to 1,000 m/min: the technology rise. Unlike false twist texturing with the speeds of up to 1200 m/mn, the speeds of air texturing until now at about 400 m/mn, in some cases up to ...
Get PriceIndustrial texturing nozzles are reviewed and categorized in two groups, either as converging-diverging or cylindrical type nozzles. A mathematical model is developed for the complex airflow in cylindrical type texturing nozzles, and experimental data obtained from various nozzles verify the flow predicted by this model.
Get PriceAir flow in yarn texturing nozzles . By Memis Acar (1248636), R.K. Turton (7206659) and Gordon R. Wray (7206662) Abstract. The air-jet texturing process, a purely mechanical means of texturing continuous filament yarns, is described. Industrial texturing nozzles are reviewed and categorized in two groups, either as converging-diverging or ...
Get Price2015-3-1 · Early texturing nozzle had an axial yarn feed while the compressed air was admitted to the nozzle body through a side entry. It also had an impact element of a flat plate type. Nevertheless, the lack of aerodynamic design of the inner configuration caused tremendous losses to the air flow resulting in inefficient texturing.
Get Price2016-7-20 · 2 Air Texturing Jets Industrially used air texturing jets, also referred to as nozzles, can be categorized (depending upon their internal design and construction) into two main groups: (i) converging and diverging type air texturing jets in which a converging-diverging flow duct (nozzle) is attached to the yam exit end of the jet
Get Price2020-4-22 · There is a lack of understanding of the air-texturing mechanism, and the existing postulated explanations fail to provide a satisfactory explanation of how the loop formation is achieved. The air-flow in the standard-core HemaJet was investigated by experimental means in order to gain a better understanding of the flow in these nozzles.
Get Pricein texturing nozzles theoretically and developed a mathe- matical model of air-jet the flow through cylindrical nozzles, which was verified by experimental results. ... Turton, R. K., and Wray, G. R., Air Flow in Yarn Texturing Nozzles, Trans ASME, J. Engng Indust., 109(3), 197– explains the dual role of water in air-jet texturing in terms ...
Get Pricetemperature of the air entering the receiver holes; the present study is concerned mainly with the heat transfer at the disc surface. Karabay et al (2001) carried out a combined experimental and computational study of flow in a “cover-plate” pre-swirl system. The cooling air from the stationary pre-swirl nozzles flowed
Get Price2018-3-2 · Air-Texturing: The major exhibitors of air-texturing machinery at ITMA 2003 in Birmingham U.K were Dietze & Schell Maschinenfabrik GmBH, Germany and SSM Staehle Eltex GmBH, Germany. Dietze & Schell presented their DS 60, DS 90 E, DS 60 D and DS 90 MFB air-texturing units. All of them are primarily designed to texture glass fibers and artificial ...
Get PriceCiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract:For further improvements in efficiency and performance of gas turbines, the secondary air system, i.e. the required cooling mass flow, plays an important role. The pre-swirled secondary air supply is a common method in the aero industry and is a promising option for heavy- duty gas turbine …
Get PriceScientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. Advantages in terms of availability, coverage, timeliness, and efficiency. Isaac Councill and C. Lee Giles.
Get PriceThe texturing performance enhanced when the L/D ratio of yarn channel was between 7 and 10, and the ratio of the cross-sectional area of air inlet to the yarn channel was 1/4th. The use of air inlet at an angle between 45° and 60° with a 10° divergence provided at the exit side of the yarn channel further enhanced the texturing process [ 6 ].
Get Pricenozzle structure on the yarn suction performance, we designed 16 nozzles, determined yarn suction force F, mass flow rate of compressed air G and analyzed yarn suction efficiency , which is defined as the ratio of F to G. The rational geometrical parameters are obtained as follows: the number of jet orifices N¼3, jet orifice diameter d¼1.6mm, jet
Get Price2016-7-20 · 2.3 Nozzles Two cylindrical and two converging-diverging nozzles were chosen for parallel feed air-jet texturing. Table 3 provides data on nozzle parameters. The di fference between HemaJet with T I 00 core and T31 0 core I ies in that the T 100 core has one air hole while the T31 0 core has three air holes. The combined
Get PriceStandard suction nozzles replaced with new, flow-optimised and highly effective suction nozzles SmartJet: The unique SmartJet nozzle retrofitted in the doffer for additional efficiency in upper yarn pick-up . Your benefit New suction nozzle. Energy efficiency. Minimises energy costs by permitting vacuum reduction ; Optimised package quality
Get PriceA method of air jet texturing is described wherein the intensity of texturing is proposed to be increased in that an air flow exceeding Mach 2 is obtained by the design of the nozzle duct. The total opening angle of the nozzle duct (11) directly in front of the texturing zone is designed to be greater than the ideal Laval angle with an effective length which is preferably a multiple of the ...
Get Price2009-1-1 · 2. SYSTEM DESCRIPTION Air-jet texturing provides a means of creating texture in yarns. Further, it is a useful means of producing a yarn structure near to that associated with staple yarns. This is an important concession to the tastes of the ultimate consumer. Twisting and air-jet texturing can be combined.
Get Price2021-6-14 · texturing methods such as false twist texturing, air-jet texturing etc. and their brief working principles; Comparative properties different textured yarns; Objectives and different methods of producing bulk yarns Principles of manufacturing high bulk yarn; Testing of textured yarns and their application areas. 6 7-9 Total 45 100
Get Price2010-10-27 · Air jet spinning has offered yarn manufacturers the opportunity to produce yarn at relatively high production rate. Unlike other spinning methods in which productivity is limited by the amount of twist in the yarn, Air Jet yarns can be produced at the same production rate regardless of yarn counts. Murata Vortex Spinners are one such leading Air Jet spinning …
Get Price2011-5-31 · - Texturing nozzle (Du Pont Type XV, Venturi 100, Needle 86D) - Intermingling nozzle (Temco LD 32.04, 32.05, 32.06) These nozzles are designed initially for a modification of classical man-made fibers and work after different principles represented in figure 3. During air-jet texturing the airflow, directed
Get Price2016-8-30 · Air-jet texturing is a well-established filament yarn processing technology that has been around for more than half a century. There is much debate about various aspects of the process in the literature such as the mechanism of loop formation, role of water in air texturing and the influence of process variables on air textured yarn structure. An
Get PriceFor constant velocity and straight flow of weft yarn sub nozzles play the vital rule in air jet loom. An air jet loom requires 40-100 m 3 /h of compressed air with about 0.6 MPa of air pressure for weaving fabric, depending on the yarn type, fabric type and loom speed [ 54 ].
Get Price2008-6-3 · Air Flow in Yarn Texturing Nozzles. J. Eng. Ind (August,1987) The Application of Rotating Flow Theory to the Flow Inside a Break Spinning Apparatus. J. Basic Eng (December,1972) Finite Elastic Behavior of Flexible Fabric Composite Under Biaxial Loading. J. Appl. Mech (September,1999)
Get Price2009-1-1 · 2. SYSTEM DESCRIPTION Air-jet texturing provides a means of creating texture in yarns. Further, it is a useful means of producing a yarn structure near to that associated with staple yarns. This is an important concession to the tastes of the ultimate consumer. Twisting and air-jet texturing can be combined.
Get PriceTherefore, the yarn is not modeled in the numerical analysis. Long and short nozzles profiles are shown in Figs. 1 and 2. The nozzles are meshed by tetrahedron meshing method, patch independent with a finite volumes varying from 99,000 and 130,000 elements, shown in Figs. 3 and 4. 2.1. Boundary conditions
Get Price2001-12-26 · Abstract: The new invention proposes that filament yarns, in particular partially stretched yarns known as POY yarns, be subjected to stretch texturing via an air treatment nozzle. The air treatment nozzles are designed in miniaturized form, have a continuous yarn duct in which there open a plurality of transverse bores for the supply of high pressure air in the range over 14 …
Get PriceSpinning exhaust and texturearray machine for manufacturing a textured yarn having a moulding device (1) and several cooperating modules (5.1, 5.2, 5.3), each of which has several production units (8.1, 8.2, 8.3) for stretching and texturing one of the threads and take up mechanism (9) for winding the thread (24), and are located next to each ...
Get PriceThe hollow-spindle process [25] is the more common filament wrapping technique, the basic principle of which is shown in Fig. 1.23.The essential features of the spinning line are a roller drafting unit, a hollow spindle on which is mounted a pirn of filament 9, a pair of take-up rollers and a package build unit.The spindle has an integral pin-type false twister located at its base (some ...
Get Price2016-9-22 · Air texturing – air nozzles Laminar vs Turbulent flow – Properties and applications of air textured yarns. Texturamat and dynafil – M.Thermal stress tester – quality control in texturising – textured yarn defects – texturing problems. TEXT BOOKS: 1. C.W.Lawrence, “Technology of Yarn Production”, Wood Head ...
Get Price2008-6-3 · Air Flow in Yarn Texturing Nozzles. J. Eng. Ind (August,1987) A Numerical and Experimental Study on the Effect of the Cone Angle of the Spindle in Murata Vortex Spinning Machine. J. Fluids Eng (March,2008) The Application of Rotating Flow Theory to the Flow Inside a Break Spinning Apparatus.
Get Pricethe nozzles, which includes various shapes and dimensions of the air inlet and the yarn guiding canals, as well as their mutual differentiated positions of yarns, result in different air flow parameters occurring, and as a conse-quence a dissimilarity of the interlu-ced connections and composite yarn parameters. The external construc-
Get Price2021-6-14 · texturing methods such as false twist texturing, air-jet texturing etc. and their brief working principles; Comparative properties different textured yarns; Objectives and different methods of producing bulk yarns Principles of manufacturing high bulk yarn; Testing of textured yarns and their application areas. 6 7-9 Total 45 100
Get PriceAir guide elements. By means of the precise and constant air flow with the suction inserts Bright and Bright-Twin, the fibers are optimally integrated in the fiber package. The improved air flow prevents deposits of dust and fiber particles. This results in a fully compacted yarn at …
Get Price2020-8-21 · Synthetic Filament Texturization Techniques. Texturization techniques Textured Yarn Process Techniques and Product developments. Texturization is also called as a disorientation process because in this process the flat continuous filaments are distorted to have loops, crimps, coils or curls along their full length to improve the bulkiness, porosity, softness and elasticity …
Get Price2001-12-26 · A method of treating filament yarn includes supplying a plurality of yarn filaments through a yarn channel of a nozzle in a yarn travel direction and introducing a blowing medium into the yarn channel substantially in a direction of the yarn travel direction and at an angle of introduction of more than about 15° and less than about 45° from a direction perpendicular to the yarn …
Get PriceThe investigation carried out by us indicated the dependencies of all the process parameters tested, such as the speed of air-flow and air pressure, the construction design of the nozzles, and the properties of the component yarns on the linked yarn properties.
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