EP2955256B1 - Metier a filer a jet d'air et procede de fonctionnement d'un tel metier a filer a jet d'air - Google Patents

Metier a filer a jet d'air et procede de fonctionnement d'un tel metier a filer a jet d'air Download PDF

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Publication number
EP2955256B1
EP2955256B1 EP15170263.6A EP15170263A EP2955256B1 EP 2955256 B1 EP2955256 B1 EP 2955256B1 EP 15170263 A EP15170263 A EP 15170263A EP 2955256 B1 EP2955256 B1 EP 2955256B1
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EP
European Patent Office
Prior art keywords
yarn
additive
spinning
sensor system
supplied
Prior art date
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EP15170263.6A
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German (de)
English (en)
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EP2955256A1 (fr
Inventor
Andreas Fischer
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP2955256A1 publication Critical patent/EP2955256A1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/32—Counting, measuring, recording or registering devices
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/30—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting
    • D01H13/304—Conditioning during spinning or twisting
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/30—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting
    • D01H13/306—Moistening, sizing, oiling, waxing, colouring, or drying yarns or the like as incidental measures during spinning or twisting by applying fluids, e.g. steam or oiling liquids
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/02—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by a fluid, e.g. air vortex

Definitions

  • the present invention relates to a method for operating an air spinning machine, the air spinning machine having at least one spinning station with a spinneret for the production of a yarn, a fiber assembly being fed to the spinneret during operation of the spinning station via an inlet, the fiber assembly being within a swirl chamber of the spinneret receives a rotation with the help of a vortex air flow, so that a yarn is formed from the fiber structure, which finally exits the spinneret via an outlet, and an additive is at least temporarily supplied to the spinning station with the aid of an additive supply during operation of the air spinning machine and onto the fiber structure and / or the yarn or is applied to parts of the spinneret.
  • an air spinning machine which has at least one spinning station with a spinneret for producing a yarn from a fiber structure fed to the spinneret, the spinneret having an inlet for the fiber structure, an internal swirl chamber, a yarn-forming element projecting into the swirl chamber and an outlet for the has in the interior of the vortex chamber produced with the help of a vortex air flow, and wherein the spinning station is assigned an additive supply, with the help of which the spinning station is supplied with an additive at least temporarily during operation of the spinning station and onto the fiber structure and / or the yarn or on parts of the spinneret can be applied.
  • Air spinning machines with corresponding spinning positions are known in the prior art and are used to produce a yarn from an elongated fiber structure.
  • the outer fibers of the fiber assembly are generated with the help of air nozzles inside the swirl chamber Eddy air flow in the area of an inlet opening of the yarn forming element is wound around the inner core fibers and finally form the wrapping fibers which are decisive for the desired strength of the yarn.
  • the term yarn is understood to mean a fiber structure in which at least some of the fibers are wound around an inner core.
  • This includes a yarn in the conventional sense that can be processed into a fabric, for example, using a weaving machine.
  • the invention also relates to air spinning machines, with the aid of which so-called roving (other name: fuse) can be produced.
  • roving other name: fuse
  • This type of yarn is characterized by the fact that despite a certain strength that is sufficient to transport the yarn to a subsequent textile machine, it is still draftable.
  • the roving can therefore with the help of a delay device, for. B. the drafting device, a roving textile machine, for example a ring spinning machine, are warped before it is finally spun.
  • the production of chemical fibers includes a so-called preparation of the continuous fibers during the manufacturing process.
  • a preparation agent usually oils with various additives, is applied to the continuous fibers, which enables a treatment, such as stretching the continuous fibers at high speeds. These preparation agents sometimes adhere to the chemical fibers during further treatment and lead to contamination in the air spinning machine.
  • the fibers fed to the air spinning machine in the form of a fiber assembly are generally fed to the spinneret by a pair of delivery rollers.
  • the delivery roller pair can one Corresponding output roller pair of a drafting system.
  • the drafting systems used are used to refine the fiber structure before it enters the spinneret.
  • a fiber guide element is usually arranged in the entry area of the spinneret, via which the fiber structure is guided into the spinneret and finally into the area of the yarn-forming element.
  • Spindles with an internal extraction channel are mainly used as yarn formation elements.
  • compressed air is introduced through the housing wall of the spinneret in such a way that the above-mentioned rotating vortex air flow results. This leads to the fact that individual external fibers are separated from the fiber assembly leaving the fiber guide element and turned over over the tip of the yarn-forming element. In the further course, these detached fibers rotate on the surface of the yarn-forming element.
  • the cleaning of the surfaces of the yarn forming element, the spinneret interior and the fiber guide element can be done manually by a Periodic removal of the yarn formation element take place, which, however, leads to a not inconsiderable maintenance effort, combined with a corresponding breakdown.
  • the EP 2 450 478 discloses a device which allows automatic cleaning to be carried out without stopping the machine.
  • an additive is added to the compressed air used to form the vortex air flow within the spinneret.
  • the additive is led to the yarn-forming element by the compressed air and effects a cleaning of the surface of the yarn-forming element.
  • a comparable solution is also in the EP 2 573 256 A2 described.
  • additive it is possible to apply additive to the fiber structure, parts of the spinneret or the yarn produced therefrom in order to improve the properties of the yarn produced therefrom, for example with regard to its hairiness.
  • higher production speeds can be run, so that the machine can also produce more economically and energy can be saved.
  • the object of the present invention is now to further develop the additive addition known from the prior art and to propose a corresponding air spinning machine, with the aid of which the further development can be implemented.
  • the method for operating an air spinning machine is characterized in that the yarn leaving the outlet of the spinneret is at least one physical with the aid of a sensor system Characteristic is monitored, it being determined on the basis of at least one measured value supplied by the sensor system and correlating with said parameter whether and / or how much additive has been applied to the fiber structure or the yarn produced therefrom and passing through the sensor system.
  • the monitoring according to the invention can take place during normal operation, during which the spinneret produces yarn and the addition of additives serves to improve the yarn properties. Additionally or alternatively, it is also possible to monitor the addition of additive during a cleaning operation of the spinning station, during which the additive serves the purpose of the cleaning described above.
  • additives in the prior art was only metered in quantity, it is now possible with the present invention to monitor the addition of additives qualitatively and / or quantitatively and the volume or mass flow of the added additive if there are deviations from the corresponding target values while the additive is being added to change.
  • the additive can be added in the area of the inlet of the spinneret or also within the same.
  • the invention proposes indirect monitoring, in which the additive addition is recognized and / or determined quantitatively on the basis of changes in one or more selected parameters of the yarn.
  • the parameters can be all physically measurable properties of the yarn, which change qualitatively or quantitatively when the additive is added. For example, it would be possible to monitor the so-called hairiness of the yarn. This is a measure of the fiber ends or fiber loops protruding from the package, with the addition of an additive in principle bringing about a reduction in hairiness, since the fiber components projecting outwards due to the Additive can be applied to the package.
  • other parameters such as, for example, fluctuations in mass and / or thickness, light reflectivity, light absorption capacity, uniformity of the yarn structure, etc., can also be monitored, all physical parameters which are influenced by the addition of additives being able to be taken into account.
  • the monitoring of the corresponding parameters enables a statement to be made as to whether and if so how much additive is added during normal and / or cleaning operation.
  • Liquid or solid substances can also be used as additives, water or an aqueous solution being preferred.
  • the production of the yarn is interrupted with the aid of a control unit if the additive supply detected with the aid of the sensor system deviates in a defined manner qualitatively and / or quantitatively from corresponding target values. This prevents a yarn from being produced during normal operation, during which an additive is actually supposed to be added, to whose fibers too little or no additive has been applied due to a lack of additive delivery.
  • the yarn production could be interrupted or a cleaning sequence repeated if the measured values transmitted by the sensors lie outside of defined limit values.
  • the sensor system comprises an optical sensor, with the aid of which the yarn is monitored, based on the Measured values of the optical sensor, a qualitative monitoring of the additive supply takes place.
  • the optical sensor it would be conceivable to use the optical sensor to monitor the above-mentioned hairiness of the yarn.
  • optical sensors it is also possible to monitor the light absorption or reflection or the size of the shadow of the yarn with appropriate lighting, which can change due to the addition of an additive.
  • the thickness of the yarn or other geometric properties of the same can be detected, which can be optically recognized and the amounts of which depend on the addition of additive.
  • the sensor system comprises a capacitive sensor, with the aid of which the yarn is monitored for its mass, the additive supply being quantitatively monitored on the basis of the measured values of the capacitive sensor. Since the mass of the yarn passing through the sensor system is made up of the mass of the yarn body consisting of the fiber material of the fiber composite and the additive applied, it is possible with the aid of the capacitive sensor to monitor an additive addition qualitatively but also quantitatively with otherwise constant spinning conditions. Monitoring therefore not only allows a statement to be made as to whether additive has been added, but also how much.
  • the sensors can of course include further or alternative sensors, with the aid of which individual physical properties of the yarn can be monitored.
  • the sensors can of course include further or alternative sensors, with the aid of which individual physical properties of the yarn can be monitored.
  • several capacitive sensors could also be present in order to monitor several properties of the yarn that can be measured capacitively. It is also possible to query several channels of one sensor each and evaluate them separately with the help of the control unit. It would be conceivable to use one channel of the capacitive sensor to graphically display the measured values determined on a display, while another channel is connected directly to a control unit which also monitors or controls the individual functions of the corresponding spinning station.
  • individual sensors or channels of corresponding sensors could be used to monitor the addition of additives, while other sensors or channels enable the yarn to be monitored for undesirable yarn defects (short or long thick or thin spots, etc.).
  • the additive is supplied in a pulsed manner, the quantitative monitoring of the additive supply being carried out by evaluating the short-term fluctuations in mass of the yarn detected by the capacitive sensor.
  • the additive dispenser responsible for adding the additive to the fiber structure or the yarn or an additive supply line connecting the additive dispenser with an additive store has a metering unit that opens and closes several times per second.
  • the additive is not applied to the fiber structure or the yarn as a uniform additive flow, but rather in the form of a large number of individual doses. This creates a multitude of tiny fluctuations in the mass of the yarn, which can be detected with the aid of a capacitive sensor.
  • evaluating the measured values in particular their averaging, a reliable statement can finally be made about the addition of additive or the amount of additive added.
  • the volume flow of the additive supplied is at least temporarily an amount between 0.001 ml / min and 7.0 ml / min, preferably between 0.02 ml / min and 5.0 ml / min, particularly preferably between 0, 05 and 3.0 ml / min, and / or that the mass flow of the additive supplied at least temporarily has an amount between 0.001 g / min and 7.0 g / min, preferably between 0.02 g / min and 5.0 g / min, particularly preferably between 0.05 g / min and 3.0 g / min.
  • the dosing unit should therefore allow a volume or mass flow over the ranges mentioned in order to be able to operate the individual spinning stations both in normal operation and in cleaning operation.
  • the volume flow (or mass flow) of the additive supplied during normal operation of the spinning station is between 0.001 ml / min (or g / min) and 1.5 ml / min (or g / min) ), preferably between 0.01 ml / min (or g / min) and 1.0 ml / min (or g / min) and an amount between 2.0 ml / min (or g / min) and 7.0 ml / min (or g / min), preferably between 3.0 ml / min (or g / min) and 7.0 ml / min (or g / min).
  • the exact value can be selected as a function of the properties of the fiber structure and / or its feed speed into the spinning station and / or the speed at which the yarn is drawn out of the spinning station and can therefore vary depending on the application.
  • the for the value provided for cleaning operation can be selected depending on the duration of the cleaning operation or the duration of normal operation between two cleaning sections.
  • the invention provides that the yarn is also monitored with the aid of the sensor system to determine whether the thickness and / or mass of the yarn exceeds or falls below predefined limit values, the sensor system being connected to a control unit of the air spinning machine and wherein the control unit interrupts the production of the yarn if at least one of the limit values is undershot or exceeded in a defined manner.
  • the sensors are not only used to monitor the addition of additives. Rather, the sensors can also be used to monitor whether the yarn production basically complies with the specifications. For example, excessively long or frequent thin spots in the yarn that cannot be attributed to a lack of additive would be an indication that the yarn is not being produced properly in the spinneret.
  • the signals from several sensors or individual channels of the same could be evaluated in combination in order to carry out a quality control of the yarn in addition to checking the addition of additives. If, for example, the capacitive sensor detected an unusual increase in mass or fluctuation in mass, even though the optical sensor reports that the additive is being added evenly, this would be an indication of poor yarn quality.
  • the mass and / or volume flow of the additive supplied during cleaning operation of the spinning station is higher than during normal operation, at least one of the limit values mentioned in the preceding paragraph being interrupted when the yarn is exceeded or undershot , has a different amount during cleaning operation than during normal operation. If the limit values were kept constant, an increase in the added values would be achieved The amount of additive during the cleaning operation indicates a thick spot or an impermissible change in another physical parameter of the yarn and the yarn production is interrupted, although the additive and the yarn production during the cleaning operation actually correspond to the specifications.
  • the limit values of the measured values supplied by a sensor that only monitors the qualitative additive addition could be the same in both operating modes (provided that additive is added both during normal and during cleaning operation and the measured values of the corresponding sensor can only be evaluated as to whether additive is added or not).
  • the spinning station of the air spinning machine comprises a sensor system, with the aid of which the yarn leaving the outlet of the spinning nozzle can be monitored with respect to at least one physical parameter, the spinning station being assigned a control unit which is designed on the basis of at least one supplied by the sensor system and with it of the characteristic value correlating to determine whether and / or how much additive was applied to the fiber structure or to the yarn produced therefrom and passing through the sensor system.
  • the control unit can be designed to operate the air spinning machine according to the individually described method features, which can be implemented individually or in any combination.
  • Figure 1 shows a section of a spinning station of an air spinning machine according to the invention (the air spinning machine can of course have a plurality of spinning stations, preferably arranged adjacent to one another).
  • the air spinning machine can comprise a drafting system with a plurality of drafting system rollers 13, which is supplied with a fiber structure 3, for example in the form of a doubled stretching belt (for reasons of clarity, only one of the drafting system rollers 13 shown is provided with a reference number).
  • the spinning station shown comprises a spinneret 2 with an internal vortex chamber 5 (see FIG. 2), in which the fiber structure 3 or at least some of the fibers of the fiber structure 3 are provided with a rotation after passing through an inlet 4 of the spinneret 2 (the exact How the spinning station works is described in more detail below).
  • the air spinning machine can comprise a pair of draw-off rollers 24 arranged downstream of the spinneret 2 and a winding device 1 downstream of the pair of draw-off rollers 24 for winding the yarn 6 leaving the spinneret 2 onto a sleeve.
  • a, for example pneumatically operating, yarn removal unit 12 can be provided in order to be able to remove yarn sections during a cleaner cut in which a yarn defect is removed from the yarn 6.
  • the spinning station does not necessarily have to have a drafting system.
  • the draw-off roller pair 24 or the yarn removal unit 12 is also not absolutely necessary.
  • the spinning station shown generally works according to an air spinning process.
  • the fiber structure 3 is provided in a predetermined transport direction T via an inlet opening which forms the inlet 4 mentioned and in Figure 2 shown fiber guide element 23 into the swirl chamber 5 of the spinneret 2.
  • a rotation that is to say at least some of the free fiber ends 10 of the fiber assembly 3 (see FIG. 4) are captured by a vortex air flow which is generated by air nozzles 19 correspondingly arranged in a vortex chamber wall 5 surrounding the vortex chamber 5 (the air nozzles 19 are detected) preferably supplied with compressed air via an air supply line 18, which opens into an air supply chamber 17 connected to the air nozzles 19).
  • Some of the fibers are pulled out of the fiber structure 3 at least a little and wound around the tip of a yarn-forming element 21 protruding into the swirl chamber 5.
  • Introduced compressed air finally leaves the spinneret 2 via the exhaust duct 20 and any air discharge 25 that may be present, which can be connected to a vacuum source if required.
  • the yarn 6 produced can in principle be any fiber structure 3, which is characterized in that an outer part of the fibers (so-called wrapping fibers) is an inner, preferably untwisted or, if necessary, also twisted Part of the fibers is looped around to give the yarn 6 the desired strength.
  • the spinning station is assigned an additive supply 8, which comprises one or more additive stores 15 and one or more, preferably at least partially flexible, additive supply lines 14, via which the respective additive store 15 with an additive dispenser arranged in the area of the fiber guide element 23 or within the spinneret 2 22 is in fluid communication (with regard to possible additives 9, reference is made to the previous description).
  • the additive 9 can be dispensed at different points. While in Figure 2 An embodiment is shown in which the additive dispenser 22 is located in the region of the inlet 4 of the spinneret 2 (so that the additive 9 can be applied to the fiber structure 3), the additive 9 can also be added to the compressed air introduced via the air nozzles 19. The addition of the additive 9 takes place here, for example, via the air supply line 18 or the air supply chamber 17 mentioned, which for example runs in a ring around the wall delimiting the swirl chamber 5 and via which the air nozzles 19 are supplied with compressed air. Finally, it is also conceivable to introduce the additive 9 via the discharge channel 20.
  • the additive supply 8 additionally comprises at least one metering unit 16, which is preferably is integrated into the corresponding additive supply line 14 and thus the additive 1 flows through it.
  • Figure 3 purely schematically three yarn sections. How Figure 3a ) shows, the yarn 6 produced during normal operation without the addition of additives generally has a certain hairiness, ie part of the free fiber ends and loops 10 protrude outwards. If, on the other hand, the fiber structure 3 or the yarn 6 is wetted with additive 9, at least some of these fiber ends 10 lie against the remaining yarn body (see Figure 3b )), so that the additive with the help of an optical sensor of the in Figure 1 Sensor technology shown can be recognized, since the hairiness turns out to be less when adding an additive than without adding an additive.
  • the measured variable in this case could be the light reflection or absorption of the light emitted by the sensor onto the yarn 6.
  • the shadow of the yarn 6 could be monitored, which is caused by the yarn 6 when the light is correspondingly irradiated.
  • the mass of the yarn 6 can be increased by adding additives, so that this could be detected with the aid of a capacitive sensor of the sensor system 11 and also monitored quantitatively.
  • the capacitive sensor either detects the change in the yarn mass per se (ie the change in the total mass, consisting of the mass of the fiber material of the yarn 6 and the mass of the additive 9 applied).
  • the capacitive sensor could also be designed to detect only the mass of the additive 9 (which can be water, for example).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Claims (10)

  1. Procédé pour exploiter un métier à filer à jet d'air,
    - dans lequel le métier à filer à jet d'air comporte au moins un poste de filage avec une filière de filage (2) pour la fabrication d'un fil (6),
    - dans lequel un ensemble de fibres (3) est délivré à la filière de filage (2) via une admission (4) pendant le fonctionnement du poste de filage,
    - dans lequel l'ensemble de fibres (3) obtient à l'aide d'un écoulement d'air tourbillonnaire une rotation au sein d'une chambre de turbulence (5) de la filière de filage (2), de sorte qu'un fil (6) soit formé à partir de l'ensemble de fibres (3), lequel fil quitte finalement la filière de filage (2) via une sortie (7), et
    - dans lequel, pendant le fonctionnement du métier à filer à jet d'air, un additif (9) est délivré au moins temporairement au poste de filage à l'aide d'une alimentation (8) en additif et appliqué sur l'ensemble de fibres (3) et/ou le fil (6) ou sur des parties de la filière de filage,
    - dans lequel le fil (6) quittant la sortie (7) est surveillé par un système de capteur (11) en ce qui concerne au moins une grandeur caractéristique physique,
    caractérisé en ce qu'il est déterminé, sur la base d'au moins une valeur de mesure fournie par le système de capteur (11) et en corrélation avec ladite grandeur caractéristique, si et/ou quelle quantité d'additif (9) a été appliquée sur l'ensemble de fibres (3) ou sur le fil (6) produit à partir de ce dernier et passant à travers le système de capteur (11),
    - dans lequel le fil (6) est en outre surveillé au moyen du système de capteur (11) pour déterminer si l'épaisseur et/ou la masse du fil (6) est/sont supérieures ou inférieures d'une manière définie à des valeurs limites prédéterminées,
    - dans lequel le système de capteur (11) est en relation avec une unité de commande du métier à filer à jet d'air,
    - dans lequel l'unité de commande interrompt la production du fil (6) si au moins l'une des valeurs limites est sous-dépassée ou est dépassée de manière définie, et
    - dans lequel le débit massique et/ou volumique de l'additif (9) introduit est plus élevé pendant un fonctionnement de nettoyage du poste de filage que pendant un fonctionnement normal, dans lequel l'une au moins desdites valeurs limites présente une quantité différente de celle du fonctionnement normal.
  2. Procédé selon la revendication précédente, caractérisé en ce que la production du fil (6) est interrompue au moyen d'une unité de commande si l'alimentation en additif détectée au moyen du système de capteur (11) s'écarte qualitativement et/ou quantitativement, d'une manière définie, de valeurs de consigne correspondantes.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de capteur (11) comprend un capteur optique à l'aide duquel le fil (6) est surveillé, par exemple en ce qui concerne sa pilosité, sachant qu'une surveillance qualitative de l'apport d'additif a lieu sur la base des valeurs de mesure du capteur optique.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de capteur (11) comprend un capteur capacitif à l'aide duquel le fil (6) est surveillé en ce qui concerne sa masse, sachant qu'une surveillance quantitative de l'apport d'additif a lieu sur la base des valeurs de mesure du capteur capacitif.
  5. Procédé selon la revendication précédente, caractérisé en ce que l'additif (9) est fourni par impulsions, sachant que la surveillance quantitative de l'apport d'additif est effectuée par évaluation des brèves fluctuations de masse du fil (6) détectées par le capteur capacitif.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le débit volumique de l'additif (9) introduit présente au moins temporairement une valeur comprise entre 0,001 ml/min et 7,0 ml/min, de préférence entre 0,02 ml/min et 5,0 ml/min, de manière particulièrement préférée, entre 0,05 et 3,0 ml/min, et/ou que le débit massique de l'additif (9) introduit présente au moins temporairement une valeur comprise entre 0,001 g/min et 7,0 g/min, de préférence, entre 0,02 g/min et 5,0 g/min, de manière particulièrement préférée, entre 0,05 g/min et 3,0 g/min.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le débit volumique de l'additif (9) introduit présente pendant un fonctionnement normal du poste de filage (8) une valeur comprise entre 0,001 ml/min et 1,5 ml/min, de préférence entre 0,01 ml/min et 1,0 ml/min, et que le débit volumique de l'additif (9) introduit présente pendant un fonctionnement de nettoyage du poste de filage (8) une valeur comprise entre 2,0 ml/min et 7,0 ml/min, de préférence entre 3,0 ml/min et 7,0 ml/min.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le débit massique de l'additif (9) introduit présente pendant un fonctionnement normal du poste de filage (8) une valeur comprise entre 0,001 g/min et 1,5 g/min, de préférence entre 0,01 g/min et 1,0 g/min, et que le débit massique de l'additif (9) introduit présente pendant un fonctionnement de nettoyage du poste de filage (8) une valeur comprise entre 2,0 g/min et 7,0 g/min, de préférence entre 3,0 g/min et 7,0 g/min.
  9. Métier à filer à jet d'air,
    - qui comporte au moins un poste de filage avec une filière de filage (2) pour la fabrication d'une fil (6) à partir d'un ensemble de fibres (3) délivré à la filière de filage (2),
    - dans lequel la filière de filage (2) comporte une admission (4) pour l'ensemble de fibres (3),
    - une chambre de turbulence intérieure (5),
    - un élément (21) de formation de fil faisant saillie dans la chambre de turbulence (5) ainsi que
    - une sortie (7) pour le fil (6) produit à l'intérieur de la chambre de turbulence (5) à l'aide d'un écoulement d'air tourbillonnaire et
    - dans lequel une alimentation en additif (8) est attribuée au poste de filage, à l'aide de laquelle un additif (9) est amené au moins temporairement au poste de filage pendant le fonctionnement du poste de filage, et appliqué sur l'ensemble de fibres (3) et/ou le fil (6),
    - dans lequel le poste de filage comprend un système de capteur (11) à l'aide duquel le fil (6) quittant la sortie (7) peut être surveillé en ce qui concerne au moins une grandeur caractéristique physique,
    caractérisé en ce qu'une unité de commande est attribuée au poste de filage, laquelle est conçue pour, sur la base d'au moins une valeur de mesure fournie par le système de capteur (11) et en corrélation avec ladite grandeur caractéristique, déterminer si et/ou quelle quantité d'additif (9) a été appliquée sur l'ensemble de fibres (3) ou sur le fil (6) produit à partir de ce dernier et passant à travers le système de capteur (11),
    - dans lequel le système de capteur (11) est conçu pour, de surcroît, surveiller le fil (6) pour déterminer si l'épaisseur et/ou la masse du fil (6) est/sont supérieures ou inférieures d'une manière définie à des valeurs limites prédéterminées,
    - dans lequel le système de capteur (11) est en relation avec l'unité de commande du métier à filer à jet d'air,
    - dans lequel l'unité de commande est conçue pour interrompre la production du fil (6) si au moins l'une des valeurs limites n'est pas atteinte ou est dépassée de manière définie, et
    - dans lequel le débit massique et/ou volumique de l'additif (9) introduit est plus élevé pendant un fonctionnement de nettoyage du poste de filage que pendant un fonctionnement normal, dans lequel l'une au moins desdites valeurs limites présente une quantité différente de celle du fonctionnement normal.
  10. Métier à filer à jet d'air selon la revendication précédente, caractérisé en ce que l'unité de commande est en relation avec le système de capteur (11) et est conçue pour commander le métier à filer à jet d'air compte tenu des valeurs de mesure transmises par le système de capteur (11) selon l'une des revendications 1 à 8.
EP15170263.6A 2014-06-12 2015-06-02 Metier a filer a jet d'air et procede de fonctionnement d'un tel metier a filer a jet d'air Active EP2955256B1 (fr)

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Publication number Publication date
EP2955256A1 (fr) 2015-12-16
US20150361594A1 (en) 2015-12-17
JP2016006246A (ja) 2016-01-14
CN105297196A (zh) 2016-02-03
US9663878B2 (en) 2017-05-30
CN105297196B (zh) 2019-04-19
CH709748A1 (de) 2015-12-15
JP6566551B2 (ja) 2019-08-28

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