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EP1473391B1 - Système et procédé d'insertion de trame - Google Patents

Système et procédé d'insertion de trame Download PDF

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Publication number
EP1473391B1
EP1473391B1 EP20040405190 EP04405190A EP1473391B1 EP 1473391 B1 EP1473391 B1 EP 1473391B1 EP 20040405190 EP20040405190 EP 20040405190 EP 04405190 A EP04405190 A EP 04405190A EP 1473391 B1 EP1473391 B1 EP 1473391B1
Authority
EP
European Patent Office
Prior art keywords
weft thread
air
nozzles
weft
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP20040405190
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German (de)
English (en)
Other versions
EP1473391A1 (fr
Inventor
Walter Dr. Siegl
Klaus Berktold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itema Switzerland Ltd
Original Assignee
Sultex AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sultex AG filed Critical Sultex AG
Priority to EP20040405190 priority Critical patent/EP1473391B1/fr
Publication of EP1473391A1 publication Critical patent/EP1473391A1/fr
Application granted granted Critical
Publication of EP1473391B1 publication Critical patent/EP1473391B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/304—Controlling of the air supply to the auxiliary nozzles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means

Definitions

  • the invention relates to a system and a method for introducing a weft thread into a shed of an air jet loom according to the preamble of claim 1 and 12 and an air jet loom with such a system and for carrying out such a method.
  • the weft yarn drawn from a yarn store is accelerated by main and tandem nozzles and entered into a shed in which it is transported further by so-called auxiliary or relay nozzles.
  • the relay nozzles are switched on and off by a preselected profile fixedly connected to the rotation of the machine main shaft. It is left to the Webmaster to adapt this profile optimally for a particular article, whereby more attention is often paid to the fabric quality than to the air consumption.
  • Document EP 0 554 222 A1 describes a method for controlling the weft insertion for a jet loom with a plurality of auxiliary nozzles and a plurality of weft guards arranged in the shed to detect the time at which the leading end of a weft inserted at the location of one of the weft guards arrives.
  • the detected time is compared with a predetermined reference arrival time and the injected compressed air before and after the weft guard arranged auxiliary nozzles or groups of auxiliary nozzles on the basis of the desired-actual value comparison changed, ie the auxiliary nozzles supplied with low, normal or elevated pressure.
  • the blowing time of the auxiliary nozzles can be shortened to delay the weft thread.
  • EP 0 554 222 A1 The method described in EP 0 554 222 A1 is relatively complicated, since it requires three separate compressed air supplies for the auxiliary nozzles. Furthermore, the simultaneous application of several groups of auxiliary nozzles allows a gentle acceleration of the weft thread, but this is associated with a massive increase in the consumption of compressed air. In addition, the arrangement of a variety of weft guards in the shed is problematic because they damage the warp threads and thereby can affect the quality of the fabric.
  • Document WO 92 04490 discloses a system and method for feeding a weft in an air jet loom in which the signals of one or more winder counters are used to calculate the length of weft weft drawn and to activate turret nozzles based on the calculated length.
  • a disadvantage of such a system and method is the limited accuracy of the calculated length, since the turn counter signals arrive at a time interval and thus only discrete values are available for the calculation of the length.
  • the object of the invention is to provide a system and a method for entering a weft thread in a shed of an air jet loom available, which have a simple and compressed air consumption optimized control of the air nozzles, which manage with a relatively low cost of system components, and the one ensure perfect fabric quality.
  • Another object of the invention is to provide an air jet loom with such a system and for carrying out such a method.
  • the system according to the invention for introducing a weft thread into a shed of an air jet loom comprises a thread store, a measuring device for detecting the weft thread drawn from the thread store, a plurality of air nozzles for introducing the weft thread and a controller connected to the measuring device for supplying compressed air to the air nozzles as a function of measured values of the measuring device.
  • the air nozzles are assigned switch-on, and the controller is designed such that one or more of the air nozzles are pressurized with compressed air, as soon as with the aid of Measured values formed predictor value for the position of the weft tip, in which the position of the weft thread tip is extrapolated to the arrival of the next measured value, reaches the switch-on of the respective air nozzle or air nozzles.
  • the switch-on point of an air nozzle preferably corresponds to the position of the air nozzle in the shed, or in the case of a group of air nozzles, which are simultaneously exposed to compressed air, to the position of the first air nozzle of the group to be passed by the weft thread tip.
  • the predictive value for the position of the weft tip contains a safety value, which depends in particular on the resolution of the measuring device and / or the switch-on for the pressure build-up in the region of the respective air nozzle and / or the speed of the weft tip.
  • the predictor values for the position of the weft tip and / or the speed of the weft tip are formed on the basis of the measured values determined for the current weft thread.
  • the air nozzles are assigned switch-off points, wherein the controller switches off one or more of the compressed air nozzles as soon as the prediction value for the position of the weft tip formed on the basis of the measured values reaches the switch-off point of the respective air nozzle or air nozzles.
  • the switch-off point preferably has a predetermined distance from the switch-on point of the corresponding air nozzle or air nozzles, and / or the switch-off point corresponds to the position of a subsequent air nozzle in the shed.
  • the thread store is designed as a drum store, on which the weft thread can be wound, wherein the measuring device is preferably arranged on the thread store or in the vicinity of the thread store and comprises at least one sensor, to detect the withdrawal of turns and / or partial turns from the drum store.
  • At least one additional sensor is provided in the path of the weft to detect the position of the weft tip within the shed, and / or a weft detector at the catch end of the shed.
  • the controller additionally comprises a control device, which is connected to the sensors of the measuring device and / or the sensor in the path of the weft thread and / or the weft thread monitor, from the measured values of the sensors and / or the weft thread monitor for the entry
  • the time required for the weft to be determined and compared with a predetermined picking time, and to control the pressure and / or the blowing time and / or the flow of the air nozzles with the difference between the time required for the entry of the weft thread and the predetermined picking time.
  • the compressed air supply of the air nozzles becomes controlled as a function of measured values of the measuring device, wherein the air nozzles are assigned switch-on points, wherein predictive values for the position of the weft tip are formed with the aid of the measured values, the position of the weft tip being extrapolated until the arrival of the next measured value to form the predictive value, in particular, a safety value is included in the predictor values for the position of the weft tip, and wherein the controller pressurizes one or more of the air nozzles with compressed air as soon as a predictive value for the position of the weft tip formed with the aid of the measured values reaches the switch-on point of the relevant air nozzle or air nozzles.
  • the time required for the picking of the weft yarn is determined and compared with a predetermined picking time, and the difference between the time taken for picking the picking yarn and the predetermined picking time is used to determine the pressure and / or the blowing time and / or to regulate the flow rate of the air nozzles.
  • the invention comprises an air jet loom with a system according to one of claims 1 to 11.
  • the system according to the invention has the advantage that it is essentially made up of system components that are currently available as standard on most air-jet looms. As a new system component only an addition to the control program is necessary, in which the functions mentioned in the characterizing part of claims 1 and 12 are implemented.
  • the system and method according to the invention make it possible to substantially reduce the compressed air consumption compared with older machines, without having to accept compromises in fabric quality, since the weft yarn is no longer subjected to compressed air as necessary.
  • the formation of a predictor value for the position of the weft tip on the basis of measured values that can be determined outside of the shed, makes it possible to make corrections during the current weft insertion and to dispense with sensors and weft thread monitor in the shed. This avoids impairment of the quality of the fabric by sensors and weft guards arranged in the shed.
  • Fig. 1 shows an embodiment of an air jet loom 1 with a system according to the present invention.
  • the system for inserting a weft thread 2 into a shed (not shown in FIG. 1) comprises a thread store 21 and a measuring device 23.1, 23.2 in order to detect the weft thread 2 withdrawn from the thread store and, in particular, the length and / or speed of the withdrawn thread To detect weft, which measuring device is preferably arranged outside the shed, for example, at the thread store 21 or in the vicinity of the thread store.
  • the system comprises a plurality of air nozzles 3, 4, 5.1 ac to 5.na-c for entering the weft yarn 2 and a Control 10, which is connected to the measuring device 23.1, 23.2, in order to control the compressed air supply of the air nozzles 3, 4, 5.1ac to 5.na-c as a function of measured values of the measuring device 23.1, 23.2.
  • the yarn store 21 is designed as a drum store, which comprises a drum 22 on which the weft thread is wound up.
  • the measuring device is advantageously arranged in the vicinity of the drum store 21 in this embodiment and comprises at least one sensor 23.1, 23.2 in order to detect the withdrawal of turns and / or partial turns from the drum 22.
  • the sensors 23.1, 23.2 are therefore referred to below as "turn counter".
  • the drum 22 has a circumference of 0.5 m and the measuring device is provided with typically three or more sensors 23.1, 23.2, which are arranged at equal angular intervals around the drum.
  • the air nozzles comprise a main nozzle 3, a tandem nozzle 4 and relay nozzles 5.1 ac to 5.na-c to accelerate the weft yarn 2 withdrawn from the yarn store 21 by means of the main nozzle 3 and tandem nozzle 4 and enter into the shed and in the shed by means of Shuttle nozzles 5.1 ac to 5.na-c continue to transport.
  • the main and tandem nozzles 3, 4 may also be provided only a single main nozzle, or it may be several consecutive nozzles, often referred to as pre-nozzles and main nozzles, arranged one behind the other to accelerate the weft.
  • a plurality of juxtaposed main nozzles 3 may be provided to alternately enter different weft threads 2, which may differ in color, fineness, texture and material.
  • the relay nozzles 5.1ac to 5.na-c are often combined in groups of two to five or more nozzles, wherein the nozzles of a group are each supplied in common via a control valve 15.1 to 15.n, for example a solenoid valve, with compressed air.
  • the control valves 15.1 to 15.n are connected to a compressed air accumulator and / or distributor 12, which is supplied with compressed air via a pressure line 11. It is also possible to provide a plurality of compressed air reservoirs and / or distributors 12, which can have different pressure levels.
  • the system for introducing a weft thread comprises a thread brake 9, which is controlled by the controller 10.
  • the weft thread 2 can be braked, in particular towards the end of the weft insertion, when the weft tip approaches the Schussanashsseite the shed.
  • a weft guard 7 may be provided to detect the arrival of the registered weft yarn 2.
  • the air-jet weaving machine 1 of the embodiment comprises a reed 8 to strike the registered weft 2 and a respective cutting device on both sides of the shed to cut off the weft 2 after striking.
  • a stretching and / or catching nozzle 6 may be provided to extend the registered weft thread 2 to the sheet stop and / or dispose of the weft end after cutting.
  • FIG. 3 shows two different entry profiles A and B.
  • the first horizontal bar 3 represents the air quantity of the main nozzle 3, the second bar 4' the air quantity of the tandem nozzle 4, the third bar 5.1'ac the air quantity of the relay nozzles 5.1 ac, etc
  • the thickness of the beam corresponds to the respective pressure ⁇ p applied to the respective nozzle, the length of the beam of the blowing time ⁇ T and the position of the beam in the horizontal direction of the position of the switch-on and switch-off times in the time sequence of the weft insertion.
  • the same entry time T e is achieved with both entry profiles. Nevertheless, the compressed air consumption for the two entry profiles A and B is different.
  • the length L 0 denotes the length of the weft thread 2 between the yarn store 21 and the shed and the length L e the length of the inserted weft thread in the shed.
  • Fig. 2a shows a typical course of the Windungskraftersignals during the first half of the weft insertion in a system according to the embodiment described below.
  • the thread store 21 in this embodiment comprises a drum 22 having a circumference u of 0.50 m, on which the weft thread to be introduced is wound up.
  • the measuring device comprises six light sensors 23.1, 23.2, which are arranged annularly at the outlet of the drum store 21 and detect the passing weft thread, ie 6 pulses are generated per drawn winding.
  • FIG. 2b A typical course of the velocity v F during a weft insertion is shown in FIG. 2b.
  • FIG. 2c A typical profile of the predictor value x F for the position of the weft tip is shown in FIG. 2c.
  • FIG. 5 shows a detail view of the weft tip of the embodiment shown in FIG. 4.
  • the tip of a weft thread 2 is located at the position x F ( t k ) within the shed.
  • the air nozzles 3, 4, 5.1ac to 5.na-c not shown in Fig. 5
  • the movement of the weft thread according to the weft insertion direction extends from left to right.
  • a predictor value x F (t k + 1 ) is formed for the position of the weft tip, for example by means of the formula (3).
  • the starting position x F (t k ) may be a position detected, for example, by a sensor arranged in the shed, or derived directly from a new pulse of the winding counter or, if at time t k, no such pulse has arrived to the previous predictor value.
  • the predictor value for the position of the weft tip contains a safety value which depends in particular on the resolution e x of the measuring device and / or on the switch-on time T Vent for the pressure buildup in the area of the respective air nozzle and / or on the speed v F ( t k ) of the weft tip.
  • the air nozzles 3, 4, 5.1 ac to 5.na-c are assigned switch-on points x j , which are specially marked in FIG. 5, the controller 10 having one or more of the air nozzles 3, 4, 5.1 ac to 5.na-c supplied with compressed air as soon as a formed by means of the measured values, for example by means of Windungsterrorismersignals, formed predictor value x F (t k + 1 ) for the position of the weft tip reaches the switch-on x j of the respective air nozzle or air nozzles , That is, an air nozzle j or group of air nozzles is turned on, if X F t k + 1 ⁇ X j
  • the switch-on point x j of an air nozzle corresponds to the position of the air nozzle in the shed, or in the case of a group of air nozzles, which are simultaneously exposed to compressed air, to the position of the first air nozzle of the group.
  • the above-mentioned safety value or parts thereof can also be taken into account when determining the switch-on point x j instead of forming the predictor value x F (t k + 1 ) .
  • the air nozzles 3, 4, 5.1 ac to 5.na-c are assigned switch-off points, wherein the controller 10 switches off one or more of the compressed air nozzles as soon as a predictor value x F (t k + 1 ) reaches the switch-off point of the respective air nozzle or air nozzles for the position of the weft tip.
  • the switch-off point preferably has a predetermined distance from the switch-on point of the corresponding air nozzle or air nozzles, and / or the switch-off point corresponds to the position of a subsequent air nozzle in the shed.
  • switch-off points of the main and / or tandem nozzles 3, 4 with the switch-off point of a relay nozzle 5.1 ac to 5.na-c, for example by switching off the main and / or tandem nozzles simultaneously with the relevant relay nozzle ,
  • At least one additional sensor is advantageously provided in the travel path of the weft thread 2 in order to detect the position of the weft thread tip.
  • the controller 10 additionally comprises a control device, which is connected to the sensors 23.1, 23.2 of the measuring device and / or the sensor in the path of the weft thread 2 and / or the weft thread monitor 7 in order to obtain from the measured values of the sensors and / or or the weft detector to determine the time required for the entry of the weft yarn 2 T e and to compare with a predetermined target entry time, and with the difference between the time required for the entry of the weft thread and the predetermined target entry time the pressure and / or to control the blowing time and / or the flow rate of the air nozzles 3, 4, 5.1 ac to 5.na-c.
  • a control device which is connected to the sensors 23.1, 23.2 of the measuring device and / or the sensor in the path of the weft thread 2 and / or the weft thread monitor 7 in order to obtain from the measured values of the sensors and / or or the weft detector to determine the time required for the entry of the weft yarn 2 T e and
  • a corresponding control device which is known under the name "Time Controller", is described, for example, in US Pat. No. 4,446,893.
  • the control can be designed so that the difference between the time required for the entry of the weft thread and the predetermined target entry time is minimal or within predetermined values.
  • the time T e required for the entry of the weft thread 2 becomes over a number of consecutive weft entries recorded and determines a mean entry time.
  • the thus determined average entry time can be used as the target entry time.
  • FIG. 6 shows a block diagram of a variant of the control and control circuits to the embodiment shown in Fig. 4.
  • the reference numeral 30 summarizes the components of the weft insertion system shown in FIG.
  • the control device 10.1 forms from the output signal predictor values for the position of the weft tip and controls in the manner described above, the switching on and off of the relay nozzles.
  • the signal path 101 forwards the switch-on signals for the relay nozzles to the corresponding control valves 15.1 to 15.n.
  • Another signal path 102 directs shutdown signals for the relay nozzles to the corresponding control valves.
  • control device can also generate switch-off signals for the main and tandem nozzles in order to control the switching off of the corresponding compressed air supply 13, 14.
  • weft detector 7 detects the arrival of the weft tip on the Schussaneatsseite the shed.
  • the signal of the weft detector 7 is fed to a control device 10.2, which, as described above, from the signal of the weft detector determines the time required for the entry of the weft thread and compared with a predetermined target entry time, and compared with the difference between the for the Entry of the weft thread required time and the target entry time the pressure and / or the blowing time, or switching off, the air nozzles controls.
  • the signal path 104 passes the control signal for the pressure to the compressed air supply 13, 14 of the main and tandem nozzles.
  • the compressed air supply 13, 14 includes occasionally adjustable and / or controllable pressure regulator, mass flow controller and / or control valves. Between the control device 10.2 and the compressed air supply 13, 14 of the main and tandem nozzles, a further signal path 103 may be provided be over which the switching off of the main and tandem nozzles can be controlled.
  • the pressure of the main and tandem nozzles is set manually and the switching off of the main and tandem nozzles is regulated by means of the regulating device 10.2 as a function of the time required for the entry of the weft thread.
  • the switching on of the main and tandem nozzles takes place in contrast to a predetermined time, which may be coupled, for example, with the main machine shaft.
  • the pressure of the main and tandem nozzles is regulated by means of the control device 10.2 as a function of the time required for the entry of the weft thread.
  • the main and tandem nozzles are turned on at a predetermined time, which may be coupled to, for example, the engine main shaft, and turned off by the control device 10.1 in response to a predictor value for the position of the weft tip.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (14)

  1. Système d'insertion d'un fil de trame dans une foule d'une machine à tisser à jet d'air (1), ledit système comprenant un accumulateur de fil (21), un dispositif de mesure (23.1, 23.2), pour détecter le fil de trame (2) retiré de l'accumulateur de fil (21), plusieurs buses d'air (3,4,5.1a-c à 5.na-c) pour l'insertion du fil de trame (2) auxquelles sont associés des points de mise en service (xj), et une commande (10) qui est reliée au dispositif de mesure (23.1, 23.2) pour commander l'alimentation en air comprimé des buses d'air (3,4,5.1a-c à 5.na-c) en fonction de valeurs de mesure du dispositif de mesure (23.1, 23.2), caractérisé en ce que la commande (10) est réalisée de manière à charger une ou plusieurs des buses d'air (3,4,5,1a-c à 5.na-c) en air comprimé dès qu'une valeur de prévision (xF) formée à l'aide des valeurs de mesure atteint pour la position de la pointe du fil de trame, dans laquelle la position de la pointe de fil de trame est extrapolée jusqu'à la réception de la valeur de mesure suivante, le point de mise en service (xj) de la ou des buses d'air concernées.
  2. Système selon la revendication 1, où les buses d'air comprennent au moins une buse principale (3) et/ou une buse tandem (4) et une ou plusieurs buses-relais (5.1a-c à 5.na-c), et où sont associés aux buses relais (5.1a-c à 5.na-c) des points de mise en service (xj), et la commande (10) charge une ou plusieurs des buses-relais (5.1a-c à 5.na-c) en air comprimé dès qu'une valeur de prévision (xF) formée à l'aide des valeurs de mesure pour la position de la pointe du fil de trame atteint le point de mise en service (xj) de la ou des buses-relais concernées.
  3. Système selon l'une des revendications 1 ou 2, où le point de mise en service (xj) d'une buse d'air correspond à la position de la buse d'air dans la foule, respectivement lors d'un groupe de buses d'air (5.1a-c à 5.na-c), qui sont chargées en même temps en air comprimé, à la position de la première buse d'air (5.1a à 5.na) du groupe.
  4. Système selon l'une des revendications 1 à 3, où la valeur de prévision (xF) pour la position de la pointe du fil de trame comprend une valeur de sécurité qui dépend notamment de la résolution du dispositif de mesure et/ou du temps de mise en service pour la montée de pression dans la zone de la buse d'air concerné et/ou de la vitesse (vF) de la pointe de fil de trame.
  5. Système selon l'une des revendications 1 à 4, où les valeurs de prévision pour la position (xF) de la pointe de fil de trame et/ou la vitesse (vF) de la pointe de fil de trame sont formées sur la base des valeurs de mesure déterminées pour le fil de trame actuel (2).
  6. Système selon l'une des revendications 1 à 5, où sont associés aux buses d'air (3,4,5.1a-c à 5.na-c) des points de mise hors service, où la commande (10) met hors service une ou plusieurs des buses d'air alimentées en air comprimé dès que la valeur de prévision (xF) formée sur la base des valeurs de mesure pour la position de la pointe de fil de trame atteint le point de mise hors service de la ou des buses d'air concernées, et où en particulier le point de mise hors service présente un écart prédéterminé au point de mise en service de la ou des buses d'air concernées, et/ou le point de mise hors service correspond à la position d'une buse d'air suivante dans la foule.
  7. Système selon l'une des revendications 1 à 6, où les buses d'air (3,4,5.1a-c à 5.na-c) comprennent au moins une buse principale (3) et/ou une buse tandem (4) et une ou plusieurs buses-relais (5.1a-c à 5.na-c), et où les points de mise hors service de la buse principale (3) et/ou de la buse tandem (4) peuvent être couplés avec le point de mise hors service d'une buse-relais présélectionnée (5.1a-c à 5.na-c).
  8. Système selon l'une des revendications 1 à 7, où l'accumulateur de fil (21) est réalisé comme prédélivreur de trame à tambour sur lequel le fil de trame peut être enroulé, et où le dispositif de mesure est disposé à l'accumulateur de fil (21) et comprend au moins un capteur (23.1, 23.2) pour détecter la délivrance d'enroulements et/ou d'enroulements partiels du prédélivreur de trame à tambour (22).
  9. Système selon l'une des revendications 1 à 8, où au moins un capteur additionnel est prévu dans le chemin de déplacement du fil de trame pour détecter la position de la pointe de fil de trame et/ou un casse-trame (7) côté arrivée de trame de la foule.
  10. Système selon l'une des revendications 1 à 9, où le système comprend de plus un frein de fil (9) pour freiner le fil de trame (2), en particulier vers la fin de l'insertion de la trame lorsque la pointe de fil de trame s'approche du côté arrivée de trame de la foule.
  11. Système selon l'une des revendications 1 à 10, où la commande (10) comprend de plus un dispositif de réglage (10.2) qui est relié aux capteurs (23.1, 23.2) et/ou au capteur dans le chemin de déplacement du fil de trame et/ou au casse-trame (7) pour définir à partir des valeurs de mesure des capteurs et/ou du casse-trame (7) le temps requis pour l'insertion du fil de trame (2) et pour le comparer à un temps d'insertion de consigne prédéfini, pour régler, avec la différence entre le temps requis pour l'insertion du fil de trame (2) et le temps d'insertion de consigne, la pression et/ou le temps de soufflage et/ou l'écoulement des buses d'air (3,4,5.1a-c à 5.na-c).
  12. Procédé d'insertion d'un fil de trame dans une foule d'une machine à tisser à jet d'air (1), procédé dans lequel le fil de trame (2) est retiré d'un accumulateur de fil (21), le fil de trame retiré (2) est détecté à l'aide d'un dispositif de mesure (23.1, 23.2), le fil de trame (2) est inséré au moyen de plusieurs buses d'air (3,4,5.1a-c à 5.na-c) dans la foule, et une commande (10) commande l'alimentation en air comprimé des buses d'air (3,4,5.1a-c à 5.na-c) en fonction de valeurs de mesure du dispositif de mesure (23.1, 23.2), où sont associés aux buses d'air (3,4,5.1a-c à 5.na-c), des points de mise en service (xj), caractérisé en ce qu'à l'aide des valeurs de mesure, des valeurs de prévision (xF) pour la position de la pointe de fil de trame sont formées, où pour la formation de la valeur de prévision, la position de la pointe de fil de trame, jusqu'à la réception de la valeur de mesure suivante, est extrapolée, en ce qu'en particulier, une valeur de sécurité figure dans les valeurs de prévision (xF) pour la position de la pointe de fil de trame, et en ce que la commande (10) charge une ou plusieurs des buses d'air en air comprimé dès qu'une valeur de prévision (xF) formée à l'aide des valeurs de mesure pour la position de la pointe de fil de trame atteint le point de mise en service (xj) de la ou des buses d'air concernées.
  13. Procédé selon la revendication 12, dans lequel est déterminé de plus le temps requis pour l'insertion du fil de trame (2) et est comparé avec un temps d'insertion de consigne prédéfini, et où la différence entre le temps requis pour l'insertion du fil de trame (2) et le temps d'insertion de consigne est utilisé pour régler la pression et/ou le temps de soufflage et/ou l'écoulement des buses d'air (3,4,5.1a-c à 5.na-c).
  14. Machine à tisser à jet d'air (1) avec un système selon l'une des revendications 1 à 11.
EP20040405190 2003-04-29 2004-03-29 Système et procédé d'insertion de trame Expired - Lifetime EP1473391B1 (fr)

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DE102005004064A1 (de) * 2005-01-21 2006-07-27 Picanol N.V. Vorrichtung zum Eintragen von Schussfäden bei einer Luftdüsenwebmaschine
EP2050847B1 (fr) 2007-10-19 2012-08-29 Siemens Aktiengesellschaft Procédé de transport d'un fil de trame par une foule d'une machine à tisser
CN102953204A (zh) * 2011-08-30 2013-03-06 苏州迪盛织造整理有限公司 喷水织机水循环装置
JP6319262B2 (ja) * 2015-10-12 2018-05-09 株式会社豊田自動織機 エアジェット織機における緯入れ制御装置
JP6447533B2 (ja) * 2016-02-19 2019-01-09 株式会社豊田自動織機 エアジェット織機における緯入れ制御方法及び緯入れ制御装置
JP7684235B2 (ja) * 2022-01-28 2025-05-27 津田駒工業株式会社 空気噴射式織機における緯入れ方法及び緯入れ装置

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NL7908357A (nl) * 1979-11-15 1981-06-16 Rueti Te Strake Bv Werkwijze voor het met behulp van een stromend medium transporteren van een inslagdraad door het weefvak bij een weefmachine, alsmede weefmachine, ingericht voor het toepassen van deze werkwijze.
JP2792128B2 (ja) * 1989-08-02 1998-08-27 株式会社豊田自動織機製作所 ジェットルームにおける緯入れ制御方法
SE9002892D0 (sv) * 1990-09-10 1990-09-10 Iro Ab Styrd utgaangsbroms vid fournissoer foer textilmaskiner, foeretraeesvis av luft- eller vatten-jet-typ
JP2936728B2 (ja) * 1990-12-27 1999-08-23 株式会社豊田自動織機製作所 ジェットルームにおける緯入れ用圧力制御装置
JP3044897B2 (ja) * 1992-01-28 2000-05-22 株式会社豊田自動織機製作所 ジェットルームにおける緯入れ方法
JPH0693534A (ja) * 1992-09-10 1994-04-05 Toyota Autom Loom Works Ltd ジェットルームにおける緯入れ制御装置

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