EP0880611B1 - Procede de texturation aerodynamique, tuyere de texturation, t te de tuyere et leur utilisation - Google Patents

Procede de texturation aerodynamique, tuyere de texturation, t te de tuyere et leur utilisation Download PDF

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Publication number
EP0880611B1
EP0880611B1 EP97901514A EP97901514A EP0880611B1 EP 0880611 B1 EP0880611 B1 EP 0880611B1 EP 97901514 A EP97901514 A EP 97901514A EP 97901514 A EP97901514 A EP 97901514A EP 0880611 B1 EP0880611 B1 EP 0880611B1
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EP
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Prior art keywords
yarn
passage
nozzle
texturing
accelerating
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EP97901514A
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German (de)
English (en)
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EP0880611A1 (fr
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Gotthilf Bertsch
Erwin Schwarz
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Heberlein AG
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Heberlein Fasertechnologie AG
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
    • D02G1/161—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam yarn crimping air jets
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/16—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam

Definitions

  • the invention relates to a method for aerodynamic texturing of yarn with a Texturing nozzle with a continuous yarn channel, at one end of which the yarn is fed and is discharged at the other end as a textured yarn, with a middle Section compressed air with a feed pressure of more than four bar fed into the yarn channel and in a widening acceleration channel the blast air jet to supersonic is accelerated.
  • the invention further relates to a texturing nozzle, a nozzle core Nozzle head and its use, with a continuous, a compressed air supply having yarn channel, on one side of the yarn can be fed, and on the other side the texturing is feasible.
  • Two types of texturing nozzles have largely become available in air-jet texturing technology enforced. These can be differentiated according to the type of compressed air supply to the yarn channel become.
  • One is the air-jet texturing nozzle based on the radial principle. Doing so the compressed air is supplied via one or more, mainly radially arranged air channels, e.g. according to EP-A-0 088 254. Texturing nozzles according to the radial principle have their Area of application above all for yarns that tend to have lower overdeliveries of less than 100% require. In special cases, with so-called fancy yarns, up to 200% tradition are allowed.
  • the second type has the axial principle. The Compressed air is fed into an expanded chamber of the yarn channel via axially directed channels guided.
  • EP-A-0 441 925 Such a solution is shown in EP-A-0 441 925. Texturing nozzles after up to 300% of the axial principle are used, especially with very high traditions even used up to 500% successfully. Differentiate between the two corresponding practical solutions also particularly due to the configuration of the nozzle opening in the area of the nozzle outlet.
  • the solution according to EP-A-0 441 925 has a nozzle opening before the exit end corresponding to a Laval nozzle.
  • the Laval nozzle is characterized by a very small opening angle of about 8 ° to a maximum of 10 °.
  • the air speed in the nozzle opening can be raised bump-free above the sound limit, provided the air pressure is on the narrowest part of the Laval nozzle above a critical pressure ratio.
  • Laval already had recognized that when the air pressure is reduced, even in an ideal nozzle, the border zone the speed increase in the nozzle. It can be a bump front form with the known shock waves. In most fields of fluid engineering compression shocks are avoided if possible.
  • the texturing process is more complex in that not only a supersonic flow with a gas is required, but at the same time, the yarn is fed through the middle of the nozzle and processed through the butting front becomes.
  • GB-A 839 493 proposes a very special nozzle structure with at least two Pipe inserts.
  • the first tube insert has a slightly smaller diameter than the inside diameter of the second one, such that one between the two pipe inserts Inlet gap for the compressed air is created.
  • the second tube insert extends up to one expanding occasion. This will make the transition between the second pipe insert and the expanding outlet creates an abrupt cross-sectional expansion and a Supersonic flow prevented.
  • the supersonic speed would be one at this point condition continuous course.
  • the pressure of approx. 2 bar is very low and would also question reaching supersonic flow.
  • the tensile force on the yarn is preferred after Texturing (in cN, or mean cN) as well as the percentage deviation of the current one Traction (sigma%) selected.
  • the two values can be recorded separately or as a total (AT value).
  • AT value the ATQ measurement and evaluation principle of Applicant in cooperation with the company Retech AG, Switzerland. Yarn speeds below 400 m / min. don't pose any difficulties today. At individual practical applications is at yarn speeds of 400 to 600 m / min. still get a qualitatively accepted texturing.
  • the object of the invention was now either the texturing quality at a increase the given speed or the production speeds e.g. in the range from 400 to 900 m / min. and increase more and also at higher ones Production speeds that are equally good or at least approximately equally good To achieve quality, such as at lower production or yarn speeds.
  • Another aspect of the task was to create existing systems with minimal effort, be it in terms of quality and / or performance.
  • the method according to the invention is characterized in that the yarn tension at a product speed of over 400 m / min. increases and the thread tension ratio is optimized to yarn speed in that the blown air jet in the Acceleration channel is accelerated to a speed greater than Mach 2, with the yarn tension of a given yarn quality over a large production speed range is about constant.
  • the invention further relates to a texturing nozzle, a nozzle core or nozzle head with a continuous yarn channel with an accelerating channel widening on the outlet side and a compressed air supply (P) into the yarn channel, on one side of which yarn can be fed and on the other side of which textured yarn can be drawn off, and is thereby characterized in that the acceleration-effective section adjoining the compressed air bores of the acceleration channel is designed continuously as a supersonic channel, and a length (l 2 ) of more than 11 ⁇ 2 times the diameter (d) at the start of the acceleration channel and a total opening angle ( ⁇ 2 ) greater than 10 ° and less than 40 °.
  • the texturing quality is at a higher production speed compared to the texturing quality at lower Production speed with one designed for the lower mach area Supersonic duct at least the same or better.
  • the texturing process is at Air speeds in the shock front of over Mach 2, e.g. at Mach 2.5 to Mach 5 so intense that almost at the highest yarn throughput speeds without exception, all loops are sufficiently gripped and well integrated in the yarn.
  • the Generation of an air speed in the high Mach range within the Acceleration channel does two things. First, the individual filaments become stronger opened and torn into the nozzle with greater force. The texturing breaks up to maximum speeds no longer together. Second, the whole Filament composite evenly and directly into the inside of clear outer channel boundaries Frontal zone led.
  • the new invention also allows for both the method and the device whole number of particularly advantageous configurations. It will also refer to the Claims 2 to 10 and 12 to 17 referenced.
  • the acceleration channel that is Yarn from the accelerating air jet over the corresponding distance drawn in and opened, and handed over to the subsequent texturing zone.
  • An essential point in texturing technology is that the end processor once for well-received quality can be maintained unchanged in further production. The constancy the same quality is often the top priority. This will be particularly good with the new solution achieved because the factors determining the texturing are more manageable than in the state of the art.
  • the main point for this is mastering the yarn tension especially with regard to the constancy of the thread tension and the constancy of the Texturing quality.
  • the compressed air is preferably in the acceleration channel via a Length of at least 1.5, preferably at least 2 times the narrowest diameter accelerated, the ratio of outlet to inlet cross section of the Acceleration channel is greater than 2.
  • the total opening angle of the blowing air jet should be larger than 10 °, i.e. larger than the ideal Laval angle. So far the best The result is achieved when the acceleration of the blast air jet has been steady. There were but also examined different variants with different accelerations. The Results were almost as good as steady acceleration with one continuous conical acceleration channel. The blow air jet is then connected to the Acceleration channel without redirection, through a discontinuous and strongly expanding Section led.
  • the blowing air is particularly preferably guided from the feed point into a cylindrical section of the yarn channel directly in an axial direction at an approximately constant speed up to the acceleration channel, the compressed air being introduced into the yarn channel via one or more, preferably three or more, bores or channels is such that the compressed air is blown in at an angle ( ⁇ ) with the delivery component in the direction of the acceleration channel.
  • the compressed air is preferably introduced into the yarn channel via three bores, such that the compressed air is blown in at a corresponding angle with the conveying component in the direction of the supersonic channel.
  • the new solution can also be used to texturize one or more yarn threads with a wide variety of traditions.
  • the entire theoretically effective expansion angle of the supersonic channel should be from the smallest to the largest diameter above 10 °, but below 40 °, preferably within 12 ° to 30 °, particularly preferably 12 ° to 25 °. According to the current roughness values, there is an upper limit angle (total angle) of 35 ° to 36 °, above which there is always one to prevent the supersonic flow from breaking off.
  • the compressed air is accelerated essentially continuously.
  • the nozzle channel section immediately upstream of the supersonic channel is preferably approximately cylindrical, with the delivery component being blown into the cylindrical section in the direction of the acceleration channel.
  • the pulling force on the yarn is increased with the length of the acceleration channel.
  • the expansion of the nozzle or the increase in the Mach number results in the intensity of the texturing.
  • the acceleration channel should have at least a cross-sectional expansion range of 1: 2.0, preferably 1: 2.5 or greater. It is further proposed that the length of the acceleration channel is 3 to 15 times, preferably 4 to 12 times larger than the diameter of the yarn channel at the start of the acceleration channel.
  • the acceleration channel can be completely or partially continuously expanded, have conical sections and / or have a slightly spherical shape. However, the acceleration channel can also be formed in stages and have different acceleration zones, with at least one zone with high acceleration and at least one zone with low acceleration of the compressed air jet.
  • the exit area of the acceleration channel can also be cylindrical or approximately cylindrical and the entry area can be greatly expanded, but expanded less than 36 °. If the boundary conditions for the acceleration channel have been complied with according to the invention, the aforementioned variations of the acceleration channel have proven to be almost equivalent or at least equivalent.
  • the yarn channel then has a strongly convex, preferably trumpet-shaped, more than 40 ° widened yarn channel mouth, the transition from the supersonic channel into the yarn channel mouth preferably being discontinuous.
  • a decisive factor was found in the fact that the impact conditions in the texturing space can also be positively influenced and kept stable with an impact body.
  • a preferred embodiment of the texturing nozzle according to the invention is characterized in that it has a continuous yarn channel with a central cylindrical section into which the air supply opens, and in the thread running direction a preferably conical acceleration channel directly adjoining the cylindrical section with an opening angle ( ⁇ 2 ) greater than 10 ° , and has a subsequent extension section with an opening angle ( ⁇ ) greater than 40 °, the extension section being conical or trumpet-shaped.
  • the invention further relates to a nozzle head with a texturing nozzle with a yarn channel, which has an inlet section in the yarn conveying direction, a cylindrical central section with the compressed air supply, and an expanded air acceleration section and a preferably deliverable impact body on the outlet side, and is characterized in that the acceleration-effective section subsequently adjoins the compressed air bores (15) of the acceleration channel are continuously designed as supersonic channels, and have a length (l 2 ) of more than 11 ⁇ 2 times the diameter (d) at the beginning of the acceleration channel and a total opening angle ( ⁇ 2 ) greater than 10 ° and less than 40 ° .
  • the yarn channel is preferably formed with the central section and the air acceleration section in a nozzle core that can be installed and removed.
  • the invention was also based on the object of improving the quality and / or the production speed in an existing system.
  • the solution according to the invention is characterized by the use of a nozzle core, as a replacement for an existing nozzle core (or an entire nozzle head with a nozzle core) for increasing the production speed and / or for improving the texturing quality according to claim 21.
  • the nozzle core or the entire nozzle head have identical fitting dimensions as the nozzle cores or the nozzle heads of the prior art.
  • the new replacement nozzle core has an air acceleration section with a length (l 2 ) of more than 1.5 times the diameter (d) at the beginning of the acceleration channel (11) and a total opening angle ( ⁇ 2 ) greater than 10 °.
  • FIG. 1 represents only the area of the nozzle mouth of a known texturing nozzle, in accordance with EP-A-0 088 254.
  • the corresponding texturing nozzle 1 has a first cylindrical section 2, which at the same time also has the same corresponds to the narrowest cross section 3 with a diameter d.
  • the yarn channel 4 begins to expand in a trumpet shape, the shape being able to be defined with a radius R.
  • a corresponding impact front diameter DAs can be determined.
  • the detachment or tear-off point A 1 can be determined relatively precisely, which is slightly larger than the clear diameter of the nozzle.
  • the acceleration range of the air can also be defined by the length l 1 from the point of the narrowest cross-section 3 and the tear-off point A 1 . Since it is a real supersonic flow, the air speed can be roughly calculated from this.
  • VDa is the highest air speed.
  • Vd is the speed of sound at the narrowest point 3. In the present example, the following values were calculated: The d ⁇ 1.225; FA F3 ⁇ 1.5; l 1 d ⁇ 1.0;
  • FIG. 2 now shows an example of an embodiment of the acceleration channel 11 according to the invention, which corresponds to the length l 2 .
  • the texturing nozzle 10 according to the invention corresponds in the example shown up to the narrowest cross section 3 to the nozzle core according to FIG. 1, but is then different.
  • the opening angle ⁇ 2 is specified at 20 °.
  • the drainage point A 2 is located at the end of the supersonic duct, where the yarn duct merges into a discontinuous, strongly conical or trumpet-shaped extension 12 with an opening angle ⁇ > 40 °. Due to the geometry, there is a butt front diameter DAE which is significantly larger than in FIG. 1.
  • an extension of the acceleration channel 11 with a corresponding opening angle increases the butt front diameter D AE .
  • Various studies have shown that the previous assumption, for example according to textile practice, that the texturing is a result of multiple knock-out penetrations of the yarn is at least partially incorrect.
  • Immediately in the area of the shock front formation is the largest possible compression shock front 13 with subsequent abrupt pressure increase zone 14.
  • the actual texturing takes place in the area of the compression shock front 13.
  • the air moves about 50 times faster than the yarn.
  • Many tests have shown that the detachment point A 3 , A 4 can also migrate into the acceleration channel 11, namely when the feed pressure is reduced.
  • FIG. 3 is a preferred one Embodiment of an entire nozzle core 5 shows in cross section.
  • the outer fit is preferably adapted exactly to the nozzle cores of the prior art. This affects before all the critical installation dimensions, the bore diameter BD, the total length L, the Nozzle head height KH, as well as the distance LA for the compressed air connection P '.
  • the attempts have show that the previous optimal injection angle ⁇ can be maintained, as can the Location of the corresponding compressed air bores 15.
  • the yarn channel 4 has in the inlet area of the yarn, arrow 16, a yarn insertion cone 6.
  • By in the yarn transport sense (Arrow 16) directed compressed air via the oblique compressed air bores 15, after backward exhaust air flow reduced.
  • the dimension "X" indicates that the Air drilling preferably at least about the size of the diameter of the narrowest Cross section 3 is set back. Seen in the direction of transport (arrow 16), the Texturing nozzle 10, or the nozzle core 5 a yarn insertion cone 6, a cylindrical middle section 7, a cone 8, which is simultaneously the acceleration channel 11 corresponds, as well as an expanded texturing space 9.
  • the texturing room becomes transverse to Flow limited by a trumpet shape 12, which is also an open conical funnel can be trained.
  • FIG. 4 shows an entire texturing head or nozzle head 20 with a built-in one Nozzle core 5.
  • the unprocessed yarn 21 is fed to the texturing nozzle via a feed mechanism 22 fed and transported as textured yarn 21 '.
  • An impact body 23 for a texturing nozzle In the exit area 13 of the There is an impact body 23 for a texturing nozzle.
  • a compressed air connection P ' is on the side of the Nozzle head 20 arranged.
  • the textured yarn 21 ' runs at a transport speed VT via a second delivery unit 25.
  • the textured yarn 21 ' is via a quality sensor 26 led e.g.
  • ATQ HemaQuality
  • the Appropriate quality measurement is a prerequisite for optimal monitoring of the Production. Above all, the values are also a measure of the yarn quality. in the Air bubble texturing process is difficult to determine quality in that no defined one Loop size exists. There is much better deviation from that of the customer as good quality. This is possible with the ATQ system because the Yarn structure and its deviation determined via a thread tension sensor 26 evaluated and the AT value can be displayed by a single key figure.
  • the thread tension sensor 26 detects in particular the analog electrical signal Thread tension after the texturing nozzle.
  • the mean and variance are the Thread tension measured values continuously calculated the AT value.
  • the size of the AT value is from The structure of the yarn depends on the user and his own Quality requirements determined.
  • the thread tension changes during production or the variance (uniformity) of the thread tension, the AT value also changes. Where the upper and lower limits can be with yarn mirrors, knitting or Tissue samples can be determined. They differ depending on the quality requirements.
  • the A very special advantage of the ATQ measurement is that different types of interference from the Process can be recorded simultaneously. E.g. Equality of texturing, Thread wetting, filament breaks, nozzle contamination, impact ball spacing, hotpin temperature, Air pressure differences, POY plug-in zone, thread pattern, etc.
  • Figure 4a is a Display pattern for the course of the AT value during a short measurement time.
  • Figures 5 and 6 show a multiple magnification compared to the actual size of the nozzle cores; 5 shows a nozzle core of the prior art, FIG. 6 shows a nozzle core according to the invention. Since the new invention succeeded in solving the problem inside the nozzle core, the new nozzle core could be designed as an exchange core for the previous one.
  • the dimensions B d , E L as the installation length, L A + K H and K H are therefore preferably not only produced in the same way, but also with the same tolerances.
  • the trumpet shape in the outer exit area is also preferably produced in the same way as in the prior art, with a corresponding radius R.
  • the impact body can have any shape: spherical, spherical flat or even in the form of a spherical cap (FIG. 8a).
  • the exact position of the impact body in the exit area is maintained by maintaining the outer mass, corresponding to an equal withdrawal gap S p1 .
  • the texturing space 18, which is denoted by 17 in FIG. 5, remains unchanged on the outside, but is now defined in the backward direction by the acceleration channel 11 according to the invention.
  • the texturing space can also be enlarged into the acceleration channel, as indicated by two arrows 18 in FIG. 6.
  • the nozzle core is made from a high-quality material such as ceramic, hard metal or special steel and is actually the expensive part of a texturing nozzle. It is important with the new nozzle that the cylindrical wall surface 21 and the wall surface 22 are of the highest quality in the area of the acceleration channel. The nature of the trumpet extension is determined with regard to the yarn friction.
  • FIG. 7 shows differently designed supersonic channels. Sometimes only that Opening angle specified for a section of the supersonic duct. Against everyone The variations between the test results were not very large. As The best forms were obtained from purely conical acceleration channels with an opening angle over 12 ° between 15 ° and 25 ° (far left in the picture).
  • the vertical column a shows pure Cone shapes, for rows b and c a combination of cone shape and short cylindrical sections, whereas the row d a parabolic acceleration channel according to the invention having.
  • the minimum total opening angle of the acceleration channel is defined here as the angle between the tangents to the parabola at the transition to the straight-line part of the nozzle channel.
  • Row c shows a combination of cone and trumpet shapes.
  • FIG. 8 shows an entire nozzle head 20, with a nozzle core 5 and one Impact body 14, which is anchored via an arm 23 in a known housing 24 is.
  • the compressed air is from a housing chamber 27 through the Compressed air holes supplied.
  • the nozzle core 5 is a clamp 28 on the Housing 24 firmly clamped.
  • the impact body can also be a Dome shape 31 have.
  • FIG. 8a shows the combination of a texturing nozzle according to the invention with some variations in the shape of the impact body 14.
  • the impact ball 14 easily penetrates into the trumpet-shaped opening of the nozzle.
  • a normal working position is shown with a dashed line in FIG. 6, dash-dotted lines, the impact ball touching the trumpet shape 12.
  • the dash-dotted position can be used as a starting position for the exact position in the working position. Due to the trumpet shape 12 on the one hand and that of the impact body 14 on the other hand, there is an internal texturing space 18, as well as a free gap Sp 1 for the flowing texturing air and for the removal of the textured yarn.
  • the gap Sp 1 is determined empirically based on the yarn quality, optimized and determined for production.
  • the texturing space 18 is given a shape and size that can be influenced, depending on the ball diameter and shape of the impact body.
  • the inventor has determined that the pressure ratios for the acceleration channel can be set primarily with the size of the trigger gap.
  • the discharge gap Sp 1 By reducing the discharge gap Sp 1 , the flow resistance and the static pressure in the texturing space change. Gap width changes on the order of tenths of a millimeter are decisive for the pressure setting.
  • circular cross sections and supersonic channels formed symmetrically in the longitudinal section were used.
  • the new solution can also be used for asymmetrical cross-sections that differ from the circular shape, for example with regard to the supersonic duct. be formed with a rectangular cross section or with an approximate rectangle or approximately oval shapes. It is also possible to design a nozzle so that it can be opened for threading.
  • PCT / CH96 / 00311 which is explained for the technical content as an integral part of the present application.
  • FIG. 9 shows the texturing of the prior art in a purely schematic manner at the bottom left. Two main parameters are highlighted. An opening zone Oe-Z1 and a butt front diameter DAs, starting from a diameter d, corresponding to a nozzle as shown in FIG. 1. In contrast, the new texturing is shown in the top right. It is very clear that the values Oe-Z2 and DAE are significantly larger. Another interesting aspect was also identified.
  • the yarn opening begins before the acceleration channel in the area of the compressed air supply P, that is to say already in the cylindrical section, which is denoted by V 0 as the pre-opening.
  • the dimension Vo greater than d is preferably selected.
  • FIG. 9 The essential statement of FIG. 9 lies in the diagrammatic comparison of the State-of-the-art yarn tension (curve T 311) with Mach ⁇ 2 and one Texturing nozzle according to the invention (curve S 315) with Mach> 2.
  • the vertical of the The diagram is the thread tension in cN.
  • Pspeed shown in m / min.
  • Curve 311 leaves this clear The yarn tension collapses at a production speed of 500 m / min. detect. Above about 650 m / min. the texturing broke down.
  • curve S 315 shows with the nozzle according to the invention that the yarn tension is not only is much higher, but in the range of 400 to 700 m / min. is almost constant and also falls slowly in the higher production area.
  • Increasing the Mach number is one of the main "secrets" for progress with the new invention.
  • FIG. 10 shows a printout of an ATQ quality test.
  • the top table gives that mean tensile stress (cN), the mean the percentage deviation of the current Tensile force (sigma%) and the table below shows the corresponding AT values.
  • cN mean tensile stress
  • sigma% percentage deviation of the current Tensile force
  • the table below shows the corresponding AT values.
  • On the first horizontal line of each table are the values of a standard T nozzle, that is a texturing nozzle of the prior art. Are from top to bottom then the values of S nozzles according to the invention with different Opening angles from 19 ° to 30.6 °. All of the nozzles according to the invention had the same Length of the supersonic duct. The values 0.00 indicate that either the texturing is not was possible or the experiment was not carried out.
  • Figures 11 and 11a show a visual comparison using textured yarn.
  • Figure 11 (right half of the picture) shows a texturing with a nozzle of the state of the Technology, at 400, 600 and 800 m / min. Production speed. At 800 m / min. has been also increased the pressure to 12. The result can be up to 400 m / min. as well and at 600 m / min. can be described as conditionally good.
  • Figure 11a On the left half of the picture ( Figure 11a) are the results of 5 experiments with a nozzle according to the invention are shown accordingly. It can be seen that even at 800 m / min. Production speed still on conditionally good result is achieved.
  • the comparative example (right besides) rejected by the customer according to the state of the art, although a feed pressure of 12 bar was used.
  • FIGS. 11 and 11a there was an identical yarn quality and the same conditions tested.
  • Core PA dtex 78f66x1; Effect: PA dtex 78f66x1; OF 12/30%.
  • Figure 12 shows the Test arrangement for the comparative tests according to FIG. 11. The following were found Measured values determined (setting data and measurement data): (see table state of the art / new Invention)
  • FIGS. 13, 13a On the left in the picture is a graphic representation of a large number of threads each with the individual force F cN / dtex (vertical) over the elongation E in% (horizontal).
  • Figure 13 belongs to Table 12a, Figure 13a to 12b and Figure 14 to Table 12c.
  • the graphical representation is a single force / Elongation curve.
  • the best texturing nozzle to date has a continuous yarn channel with one on the outlet side, the acceleration channel and a compressed air supply (P) into the yarn channel one end of which can be fed with yarn and at the other end of which textured yarn can be removed is on and is characterized in that it has a continuous yarn channel with a middle, cylindrical section, into which the air supply opens, and in
  • Thread running direction has a conical acceleration channel preferably directly adjoining the cylindrical section with an opening angle ( ⁇ 2 ) greater than 10 ° and a subsequent extension section with an opening angle greater than 40 °, the extension section being conical or trumpet-shaped.
  • the texturing nozzle can be used as a nozzle core, which can be installed and removed in a nozzle head, and forms a nozzle head when installed, or as a nozzle head with built-in nozzle core can be formed, with an outlet side, deliverable on the nozzle core arranged impact body through which the texturing space can be limited.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Paper (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (17)

  1. Procédé de texturation aérodynamique de fil à l'aide d'une tuyère de texturation (10) équipée d'un canal de fil continu (4), à une extrémité duquel le fil (21) est amené, et à l'autre extrémité duquel il est évacué sous forme de fil texturé (21'), dans lequel, dans une section centrale (7), de l'air comprimé à une pression d'alimentation (P) de plus de quatre bars est introduit dans le canal de fil (4), et dans un canal d'accélération (11) qui s'élargit côté sortie, le jet d'air de soufflage est accéléré jusqu'à une vitesse supersonique, et la tension du fil est augmentée jusqu'à une vitesse de production supérieure à 400 m/mn, caractérisé en ce que le rapport entre la tension du fil et la vitesse du fil est optimisé en ce que le jet d'air de soufflage est accéléré dans le canal d'accélération (11) jusqu'à une vitesse supérieure à Mach 2, la tension du fil d'une qualité de fil donnée étant approximativement constante dans une plage de vitesse de production étendue.
  2. Procédé selon la revendication 1, caractérisé en ce qu'à une pression d'alimentation donnée (P) de l'air comprimé entre 6 et 14 bars ou plus, la tension du fil d'une qualité de fil donnée est approximativement constante à une vitesse de production de 400 à 700 m/mn.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que l'air de soufflage est introduit depuis le point d'amenée dans le canal de fil (4) directement dans une direction axiale à une vitesse approximativement constante jusqu'au canal d'accélération (11), l'air comprimé (8) étant introduit dans le canal de fil (4) à travers un ou plusieurs alésages (15) de telle sorte que l'air comprimé est de soufflage à un angle (β) avec la composante de transport dans la direction du canal d'accélération (11).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un ou plusieurs filaments sont introduits selon le principe de noyau/ enveloppe à amenée identique ou différente, et texturés à une vitesse de production de 400 à 1500 m/mn ou plus.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le jet d'air comprimé est accéléré dans le canal supersonique jusqu'à 2,0 à 6 Mach, en particulier jusqu'à 2,5 à 4 Mach.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'extrémité côté sortie du canal de fil (4) est limitée par un élément de rebondissement (23) de telle sorte que le fil texturé (21') soit évacué approximativement de façon perpendiculaire à l'axe du canal de fil à travers une fente (Sp1).
  7. Tuyère de texturation (10) équipée d'un noyau de tuyère (5) ayant un canal de fil continu (4) avec un canal d'accélération (11) qui s'élargit côté sortie et des alésages d'air comprimé (15) dans le canal de fil (4) d'un côté duquel le fil (21) peut être amené et de l'autre côté duquel du fil texturé (21') peut être évacué, dans laquelle la section à effet d'accélération est réalisée suite aux alésages d'air comprimé (15) du canal d'accélération (11) en continu comme un canal supersonique, et présente une longueur (l2) correspondant à plus de 1,5 fois le diamètre (d) au début du canal d'accélération (11) et un angle d'ouverture total (α2) supérieur à 10° et inférieur à 40°.
  8. Tuyère de texturation selon la revendication 7, caractérisée en ce que l'angle d'élargissement effectif (α2) du canal d'accélération (11) s'élève à 12° à 30°.
  9. Tuyère de texturation selon la revendication 7 ou 8, caractérisée en ce que le canal d'accélération (11) présente au moins une plage d'élargissement de section transversale de 1:2,0 ou plus et un angle d'ouverture total (α2) supérieur à 10°.
  10. Tuyère de texturation selon l'une quelconque des revendications 7 à 9, caractérisée en ce que le canal d'accélération (11) est réalisé de façon conique et passe en particulier à une ouverture (12) en forme de trompette nettement plus élargie.
  11. Tuyère de texturation selon l'une quelconque des revendications 7 à 10, caractérisée en ce que la longueur (l2) du canal d'accélération (11) est au moins deux fois plus grande que le diamètre (d) du canal de fil au début du canal d'accélération.
  12. Tuyère de texturation selon l'une quelconque des revendications 7 à 11, caractérisée en ce que la zone d'entrée du canal d'accélération (11) est cylindrique ou approximativement cylindrique (VO) et la zone de sortie à l'extrémité du canal de fil est élargie de plus de 40°.
  13. Tuyère de texturation selon l'une quelconque des revendications 7 à 12, caractérisée en ce que la tuyère de texturation à soufflage d'air (10) présente une amenée d'air comprimé (P) selon le principe radial.
  14. Tête de tuyère (20) équipée d'une tuyère de texturation (10) ayant un canal de fil continu (4) qui présente dans la direction de transport du fil une section d'introduction, une section centrale cylindrique munie de l'amenée d'air comprimé, ainsi qu'une section d'accélération d'air (11) élargie côté sortie et un élément de rebondissement (23) côté sortie, le fil pouvant être amené au niveau de la section d'introduction et pouvant être évacué du côté de l'élément de rebondissement, la section à effet d'accélération (11) étant réalisée suite aux alésages d'air comprimé (15) du canal d'accélération (11) en continu comme un canal supersonique, et présente une longueur (l2) correspondant à plus de 1,5 fois le diamètre (d) au début du canal d'accélération (11) et un angle d'ouverture total (α2) supérieur à 10° et inférieur à 40°.
  15. Tête de tuyère (20) selon la revendication 14, équipée d'une tuyère de texturation (10) ayant un canal de fil (4) qui présente dans la direction de transport du fil une section d'introduction, une section centrale cylindrique avec l'amenée d'air comprimé (8) ainsi qu'une section d'accélération d'air élargie et côté sortie un élément de rebondissement qui peut de préférence être avancé, caractérisée en ce que le canal de fil (4) est réalisé avec la section centrale ainsi que la section d'accélération d'air dans un noyau de tuyère (5) pouvant être installé et désinstallé.
  16. Tête de tuyère (20) selon l'une quelconque des revendications 14 ou 15, caractérisée en ce que le noyau de tuyère (5) présente un canal de fil (4) continu avec une section cylindrique centrale (7), dans laquelle aboutit l'amenée d'air à travers des alésages d'air comprimé (15), ainsi qu'une section d'élargissement conique, directement adjacente à la section cylindrique (7) dans la direction d'avance du fil et ayant un angle d'ouverture supérieur à 10°, ainsi qu'une section d'élargissement adjacente, conique ou en forme de trompette et ayant un angle d'ouverture (χ) supérieur à 40°.
  17. Utilisation d'une tuyère de texturation (10) comme tête de tuyère (20) ou noyau de tuyère (5) avec un canal de fil continu (4) avec un canal d'accélération (11) s'élargissant côté sortie et des alésages d'air comprimé (15) dans le canal de fil (4), d'un côté duquel le fil (21) peut être amené et de l'autre côté duquel du fil texturé (21') peut être évacué, pour la texturation aérodynamique de fil (21), dans laquelle la section à effet d'accélération du canal d'accélération (11) est réalisée de façon continue comme un canal supersonique et présente une longueur (l2) correspondant à plus de 1,5 fois le diamètre (d) au début du canal d'accélération (11) et un angle d'ouverture total (α2) supérieur à 10° et inférieur à 40°, de telle sorte que dans le canal d'accélération (11) un courant supersonique de plus de Mach 2 puisse être obtenu.
EP97901514A 1996-02-15 1997-02-12 Procede de texturation aerodynamique, tuyere de texturation, t te de tuyere et leur utilisation Revoked EP0880611B1 (fr)

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DE19605675 1996-02-15
DE19605675A DE19605675C5 (de) 1996-02-15 1996-02-15 Verfahren zum aerodynamischen Texturieren sowie Texturierdüse
PCT/CH1997/000045 WO1997030200A1 (fr) 1996-02-15 1997-02-12 Procede de texturation aerodynamique, tuyere de texturation, tête de tuyere et leur utilisation

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EP0880611B1 true EP0880611B1 (fr) 2001-08-08

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TW476821B (en) 2002-02-21
US6088892A (en) 2000-07-18
DE19605675C5 (de) 2010-06-17
JP3215341B2 (ja) 2001-10-02
BR9707431A (pt) 2000-01-04
JP2000514509A (ja) 2000-10-31
DE19605675A1 (de) 1997-08-21
ES2160923T3 (es) 2001-11-16
GB9702679D0 (en) 1997-04-02
EP0880611A1 (fr) 1998-12-02
KR100296216B1 (ko) 2001-12-28
TR199801567T2 (xx) 1998-11-23
TW477838B (en) 2002-03-01
GB2310219A (en) 1997-08-20
CN1211293A (zh) 1999-03-17
JP3433946B2 (ja) 2003-08-04
WO1997030200A1 (fr) 1997-08-21
JPH09310241A (ja) 1997-12-02
DE59704244D1 (de) 2001-09-13
CN1095887C (zh) 2002-12-11
RU2142029C1 (ru) 1999-11-27
DE19605675C2 (de) 1997-12-11
KR19990082499A (ko) 1999-11-25
TW517108B (en) 2003-01-11

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