Effect of Nozzle Geometry on Air-Jet Texturing Performancegood quality

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  • Effects of Geometry on the Flow Characteristics and ...

    2020-4-22 · highlight the fact that the current descriptions of air-jet texturing are not fully capable of explaining the subtle effects due to nozzle geometry and can at best be described as incomplete. Air-jet texturing is a versatile process for producing of a wide range of …

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  • (PDF) Airjet texturing

    Key words air-jet texturing, yarn wetting, inter- filament friction, loop formation and fixation, spin finish The air-jet texturing process produces spun-like yarns by this entrained water, usually adhered to the surface of the modifying the uniform arrangement of the synthetic con- filaments and trapped between them, meets the incoming tinuous ...

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  • (PDF) Impact of Process Parameters and Nozzle Design on ...

    1.6.1 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 ...

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  • Analysis and Optimization of a Texturing Nozzle ...

    and twist effects. The air flow in the texturing nozzle can be described by the conservation equations for mass, momentum and energy, combined with the ideal gas equation. This leads to the compressible Navier-Stokes equations. In the nozzle, the string of filaments is represented as a cylindrical dome, in order to simplify the geometry.

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  • Numerical and experimental study of the influence of ...

    in an unsteady motion, yarn ballooning and air jet nozzle effi-ciency reduction. The air pressure effect was also examined; they found that an increase in air pressure level can lead to a higher tangential, axial, and radial velocity. This increase in velocity will depend on the air jet nozzle geometry.

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  • Investigation of the use of High Pressure Water for Spun ...

    2020-4-16 · An existing air-jet texturing machine was modified to supply either air or water to the texturing nozzle. A new texturing-jet was designed and developed to produce spun-like textured yarn using water. The texturing jet was further improved by incorporating capillary effect to suck air with water into the texturing zone to improve

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  • The Fundamentals of Air-Jet Texturing - 1library.net

    The main purpose of the air texturing process is to take flat multifilament yarns and convert them into a three dimensionally stable bulked structures by forming continuous filaments into loops and core that supports these loops. This section describes the mechanism of loop formation in air jet texturing.

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  • Rimvydas Milašius Yarn Properties on the Yarn Structure ...

    D air texturing machine with a Hemajet – LB04 texturing jet was used. Three different structure yarns were produced: 1 core yarn + 3 effect yarns (1c+3e), 2 core yarns + 2 effect yarns (2c+2e), 3 core yarns + 1 effect yarn (3c+1e). 3 samples of each structure yarn were produced, changing the air pres-sure in the jet from 0.6 to 0.7 and to 0.8

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  • A review of physical experimental research in jet ...

    2019-8-13 · Jet electrochemical machining (Jet-ECM) is a non-traditional machining process that has developed rapidly since its introduction in the 1980s with progress being made in micro-machining and surface finishing. This paper critically reviews the development of physical experimental work in Jet-ECM and corresponding hybrid technologies and their applications, e.g. laser- and air-assisted Jet-ECM.

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  • Accuracy of the pattern transfer from the metal mask to ...

    2019-12-12 · Multiphase jet machining (MJM) is a recently developed surface texturing method based on which a mixture of abrasives and water is accelerated by compressed air to remove material from substrates. Considering the high divergence of the jet, masks are needed for MJM to obtain the desired features and dimensions. To investigate the pattern transfer accuracy, masks were prepared from a …

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  • MASTER OF TECHNOLOGY (M.TECH) (TT/TC) DEGREE

    2019-3-29 · picking, airjet nozzle, waterjet nozzle, rapier drives. Kinematics of weft population in unconventional weaving machines : air drag theory. Loom timings for shuttleless looms. TT 510 Structural Engg of Fibre Assemblies 4(150 ) Elements of yarn geometry. Geometry of helix and its application to yarn structure. Geometry of folded yarns.

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  • Reducing environmental impact in air jet weaving ...

    2016-6-6 · Reducing environmental impact in air jet weaving technology Reducing environmental impact in air jet weaving technology Grassi, Corrado; Schröter, Achim; Gloy, Yves Simon; Gries, Thomas 2016-06-06 00:00:00 Purpose – The purpose of this paper is to deal with the energy efficiency of textile weaving machines. Increasing energy costs and environmental impact are a challenge for textile ...

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  • OSA

    Waterjet-guided material processing is a technique that combines the capabilities of laser material processing with water jetting. In this study, we have investigated laser beam propagation in a waterjet column by numerically solving the Maxwell equations and the heat equation. A 1064 nm laser and its frequency-doubled 532 nm laser were chosen for the simulations, and the finite-difference ...

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  • TEKSTİL VE MÜHENDİS (Journal of Textiles and Engineer ...

    Alagirusamy et al. (2005) reported a study on effect of jet design to the intermingling and also described im-provements of commingling nozzle design in the com-mingling process. This study found that knot frequency and interlacing degree of composite commingled yarns depend on the nozzle design. Air inlet number and inlet

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  • Ink - Jet Texturing - A New Technology for Producing ...

    2003-4-7 · The new texturing machine developed by Intexia uses the latest high-resolution, drop-on-demand inkjet printheads. The machine incorporates both the ink-jet printing and electro-chemical etching systems. Designed for maximum versatility, it is capable of texturing a range of both flat and cylindrical components in a variety of sizes.

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  • Review of non-conventional technologies for assisting ...

    2020-11-2 · The needle electrode is connected to the power supply, and the nozzle is connected to the ground. The gas supply contains N 2 with purity of 99.999% with an adjustable flow rate, usually kept at 1 m 3 /h. Through this combination, the injected nitrogen is converted to a plasma jet and is ejected to surrounding air through the nozzle .

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  • Indian Journal of Fibre - 14.139.47.11

    Stress-strain characteristics of air-jet textured polyester yarns . R S Rengasamy, V K Kothari & Asis Patnaik [IPC Code: Int. Cl 7. D02G 3/22, D06H 3/00] 283. Migratory behaviour of core and sheath fibres in dref-III friction-spun acrylic yarns. S Dhamija, S Sambari & …

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  • Applications of texturization techniques on cutting tools ...

    2020-7-12 · Xie et al. [] studied the effects of textured tools in the Ti-6AL-4 V dry turning, with textured cutting tools made by micro grinding, shown in Fig. 4.The results showed that the grooved tool reduced tool wear and reduced machining temperature. The decrease in cutting forces and temperature was reached, being 27.2 and 56.1%, respectively, were related to textures of 25 μm, since for 149 μm ...

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  • Fluid dynamics of acoustic and hydrodynamic cavitation in ...

    2017-3-15 · The reasons for these discrepancies are: secondary-scale effects related to micro-geometrical differences, which are caused by wall roughness and by details of the nozzle geometry, such as roundness at the nozzle inlet [47,48] and nozzle conicity, or …

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  • The Effect Of Specimen Geometry On Crack Growth ... - TWI

    Crack growth resistance of 20mm thick API 5LX65 pipeline steel in the longitudinal orientation has been measured in both three-point bend and centre-cracked tension (CCT) using the yielding mechanics parameters J and COD. Energy balance considerations are extended to describe instability in the elastic-plastic regime. Member Report 61/1978

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  • Publications - Fluid Mechanics

    Sabnis, K and Babinsky, H and Galbraith, DS and Benek, JA (2021) Nozzle geometry-induced vortices in supersonic wind tunnels. AIAA Journal, 59. pp. 1087-1098. ISSN 0001-1452. Story, J and Garcia, IV and Babinsky, H (2021) The Effect of Cross-Flow Vortex Trap Devices on the Aerodynamic Drag of Road Haulage Vehicles. SAE Technical Papers.

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  • Indian Journal of Fibre - 14.139.47.11

    Stress-strain characteristics of air-jet textured polyester yarns . R S Rengasamy, V K Kothari & Asis Patnaik [IPC Code: Int. Cl 7. D02G 3/22, D06H 3/00] 283. Migratory behaviour of core and sheath fibres in dref-III friction-spun acrylic yarns. S Dhamija, S Sambari & …

    Get Price
  • MASTER OF TECHNOLOGY (M.TECH) (TT/TC) DEGREE

    2019-3-29 · picking, airjet nozzle, waterjet nozzle, rapier drives. Kinematics of weft population in unconventional weaving machines : air drag theory. Loom timings for shuttleless looms. TT 510 Structural Engg of Fibre Assemblies 4(150 ) Elements of yarn geometry. Geometry of helix and its application to yarn structure. Geometry of folded yarns.

    Get Price
  • ENERGY BASED EVALUATION OF WATERJET PEENING

    2014-4-14 · WAJ nozzle -Run 23: P S: 600 MPa SOD: 101.6 mm u: 120 mm/s d n: 0.25 mm with a WJ nozzle Based on the results presented by Chillman et al [7], these standoff distance and air flow rate pairings were shown to tailor the jet structure in a means that led to the most aggressive material removal. Figure 2. R a

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  • Morphology evolution of the light trapping structure using ...

    2021-7-14 · The texturing experiments were conducted in the atmosphere by using the ICP jet device to acquire the light trapping structure on the c-Si surface. A Si sample of 2 × 2 cm 2 was fixed on the sample stage after being cleaned through sanitation in ethanol and de-ionized water.

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  • Applications of texturization techniques on cutting tools ...

    2020-7-12 · Xie et al. [] studied the effects of textured tools in the Ti-6AL-4 V dry turning, with textured cutting tools made by micro grinding, shown in Fig. 4.The results showed that the grooved tool reduced tool wear and reduced machining temperature. The decrease in cutting forces and temperature was reached, being 27.2 and 56.1%, respectively, were related to textures of 25 μm, since for 149 μm ...

    Get Price
  • Review of non-conventional technologies for assisting ...

    2020-11-2 · The needle electrode is connected to the power supply, and the nozzle is connected to the ground. The gas supply contains N 2 with purity of 99.999% with an adjustable flow rate, usually kept at 1 m 3 /h. Through this combination, the injected nitrogen is converted to a plasma jet and is ejected to surrounding air through the nozzle .

    Get Price
  • Method and device for treating filament yarn with air ...

    In contrast, air jet texturing is known, for example, from EP-PS 88 254. Air jet texturing utilizes the forces of air, in particular shock waves at the outlet from an air nozzle. The shock waves produce filament loops uninterruptedly on each individual filament. During air jet texturing, the yarn is guided into the air nozzle with a large overfeed.

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  • Table of contents

    Nozzle-internal particle velocity measurements and loading effect on particle acceleration inside a cold spray ... Significance of personnel qualification and quality management for thermal spray plants.....15 H. Cramer, R. Huber and A. Ohliger-Volmer, Milnchen/DE ... Effect of nozzle geometry on the microstructure and properties of HVAF ...

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  • Jun Wang

    2021-8-23 · Emeritus Professor Jun Wang is with the School of Mechanical & Manufacturing Engineering Contact E-mail: [email protected] (***NO longer take new research students***) Professor Jun Wang has been a member of the academic staff in the Ocean University of China (1982-1988), the University of Melbourne (1993-1995), Queensland University of Technology (1995-2005) and UNSW …

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  • Charpy V-Notch Test: Striker Geometry and Specimen ...

    An investigation of striker geometries and the influence of specimen thickness on the energy absorbed in a Charpy V-notch impact test is reported. Tests were performed on a ferritic steel submerged arc weld metal and the following plain materials: five ferritic steels, three austenitic stainless steels, two aluminium bronzes and an aluminium alloy. Relevance of the research to pressure vessel ...

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  • Dr Arunangshu Mukhopadhyay, Professor - Textile

    A. Mukhopadhyay & D. P. Chattopadhyay, “Effect of caustic soda treatment on the mechanical properties of ring and air jet spun yarn fabrics” 1996: Textile Asia: S. K. Punj, A. Mukhopadhyay & R. N. Saha, “Air-jet spinning of acrylic” 1996: Indian J. Fibre & Textile Res.

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  • Fabrication of Microlens Array and Its Application: A ...

    2018-2-27 · Microlens arrays are the key component in the next generation of 3D imaging system, for it exhibits some good optical properties such as extremely large field of view angles, low aberration and distortion, high temporal resolution and infinite depth of field. Although many fabrication methods or processes are proposed for manufacturing such precision component, however, those methods still ...

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  • CIRP

    2021-8-28 · CAMJP makes use of a purposely designed multi-jet nozzle incorporated with a pressure control system. The effect of surface curvature on the MRR is analysed by computational fluid dynamic modelling. The fluid pressure of each jet is controlled independently to vary the MRR according to the curvature of freeform surfaces.

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  • Browse Papers, page 2346 - SAE International

    2004-3-8 · A well-known problem with open-jet wind tunnels are low-frequency pulsations, which affect the flow quality and thus the quality of the measured data. This so-called wind tunnel buffeting is caused by large-scale vortices in the shear layer, which excite acoustic resonant modes of the wind tunnel circuit.

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  • International Journal of Heat and Fluid Flow

    About. The International Journal of Heat and Fluid Flow publishes high impact research that primarily expands upon the interplay between fluid dynamic processes and convective heat transfer through the use of experiments and/or computer simulations, with an emphasis on the physics associated with the problem considered.

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  • M.Tech. (Textile Technology) from Rajasthan Technical ...

    Noise control in texturing. Air jet texturing - Principle, mechanisms, development of jets and machinery, process optimization and characterization, air jet texturing of spun yarns. Air interlacement - Principle and mechanism, jet development and characterization. Bulked continuous filament yarns - Need, principle, technology development.

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  • Publications - RWTH AACHEN UNIVERSITY Institut für ...

    Debicki, Lukasz Mikolaj (Corresponding author) 85 Jahre Institut für Textiltechnik der RWTH Aachen University (ITA) Verstärkungsstrukturen für den Einsatz im myokardialen Tissue Engineering. Bolle, Tim. Neue Methode integriert Inserts in Preforms besser. Schwab, Max …

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