EP3481980B1 - Dispositif d'alimentation de fil de trame à courroie sans fin et procédé de commande du dispositif - Google Patents

Dispositif d'alimentation de fil de trame à courroie sans fin et procédé de commande du dispositif Download PDF

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Publication number
EP3481980B1
EP3481980B1 EP17824625.2A EP17824625A EP3481980B1 EP 3481980 B1 EP3481980 B1 EP 3481980B1 EP 17824625 A EP17824625 A EP 17824625A EP 3481980 B1 EP3481980 B1 EP 3481980B1
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EP
European Patent Office
Prior art keywords
yarn
weaving machine
feeding device
yarn feeding
loop
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EP17824625.2A
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German (de)
English (en)
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EP3481980A1 (fr
EP3481980A4 (fr
Inventor
Pär JOSEFSSON
Birger Johansson
Bjrön HALVARSSON
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Vandewiele Sweden AB
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Vandewiele Sweden AB
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    • 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
    • D03D47/36—Measuring and cutting the weft

Definitions

  • the present disclosure relates to a yarn feeding arrangement.
  • the present disclosure relates to a weft yarn feeding arrangement suitable for a weaving machine operated at high speed and potentially also with yarns with relative high weight per length unit.
  • Weft yarn pre-winders are used to eliminate yarn tension variations to ensure high textile quality and productivity of a textile machine, e.g. a shuttleless weaving machine or knitting machine.
  • a general development trend in weaving is that the speed of the weaving machine is constantly being increased. At the same time the weavers strive to weave coarser yarns and also weaker yarns. Coarser yarns and higher speeds lead to increased tension of the weft yarn. Using conventional weft yarn pre-winders, increased speeds as well as coarser yarns result in a bigger take off yarn balloon in the weft yarn pre-winder, which needs to be reduced using a high braking force but thereby unfortunately leading to an undesirably high output yarn tension.
  • a brush ring is often worn out in as little as a day and a flexible truncated-cone brake element can be worn out in a few months.
  • Another example is weaving technical fabric with coarse synthetic yarns; where one faces the same problem as in a carpet weaving machine.
  • the insertion means in the rapier weaving machine consists of one or two rigid or flexible rapiers that mechanically transfers the weft yarn from one end of the shed of the machine to the other.
  • the most common system is two rapiers which meet in the middle of the shed where the weft yarn tip is transferred from the first, giving, rapier to the second, receiving, rapier.
  • the first rapier is first accelerating from zero to full speed and then decelerating to zero again at the tip transfer point. This type of motion is analogous for the second rapier. This leads to a weft yarn tension that goes from low to high and then back to low again.
  • Weaker yarns are cheaper and are thus attractive to use. Weaker yarns have less tensile strength and if a too high brake force is applied in order to control the balloon, or to give enough tension for the rapier function, the risk for yarn break is increasing rapidly.
  • GB 1355687 describes a yarn feeder where a member directly connected to the weaving machine moves back and forth to remove yarn in unison with the movement of the rapier from a yarn package during both a forward and return movement of the rapier. Hereby, the speed at which the yarn is drawn from the yarn package can be reduced to one half. This arrangement will form a yarn buffer.
  • a yarn buffer will, generally speaking, provide an arrangement that can hold a bit of yarn that can be drawn with a small force during at least a part of the weaving cycle compared to the force required if the yarn would have been drawn directly from the yarn storage.
  • GB 2131055 describes a weft yarn metering device.
  • DE 10203733 describes a linear measurement and magazine storage arrangement for a thread, which comprises thread feed elements and thread length-measuring elements together with magazines.
  • Reversing elements for thread parts are designed to bring about interaction with thread parts between thread support elements.
  • the magazines are designed with retaining devices which retain thread parts in predetermined positions.
  • the device described in GB 1355687 allows for a reduced speed at which the yarn is drawn from the yarn feeder, it has limitations and drawbacks.
  • the speed reduction can only be 50% and not more.
  • the fact that the member is directly connected to the weaving machine and moves back and forth to remove yarn in unison with the movement of the rapier from a yarn package during both a forward and return movement of the rapier makes it impossible to draw yarn from the yarn storage when the rapier is not moving such as during beat up.
  • the device moves in unison with the rapiers as it is mechanically coupled to the drive of the rapiers in the weaving machine limits the functionality as it is not possible to improve the function by utilizing other suitable moments in the weaving machine cycle to even out the speed even more and/or compensate for other movements in the weaving machine.
  • the device requires a traveler guided along a rail, which imposes additional friction forces and a moving part, which could be a disadvantage in some applications.
  • a yarn feeding device for feeding weft yarn to a weaving machine.
  • the weaving machine can in particular be a weaving machine comprising at least one rapier.
  • the weaving machine can also be an air-jet weaving machine or a water jet weaving machine.
  • the yarn feeding device comprises at least one running endless belt driven by a controlled motor.
  • the motor is configured to drive the running belt at essentially constant speed.
  • the running belt comprises at least one yarn transport element each.
  • the yarn transport element(s) are adapted to draw yarn from a yarn storage and release the yarn at a set location to form a loop or loops of yarn acting as a yarn buffer for the weaving machine.
  • an efficient yarn feeding device can provide yarn to the weaving machine with low tension and at the same time significantly reduce the maximum yarn take-off speed from the yarn storage.
  • at least one yarn restraining element is provided to hold the yarn in a loop.
  • the at least one yarn restraining element can be a clamp, a brush or a surface having an element located above said surface and distanced from said surface by a distance corresponding to at least the thickness of the yarn.
  • the yarn feeding device is adapted to form two loops.
  • the formed yarn buffer can be adapted to feed a double-sided rapier weaving machine in an efficient manner.
  • the yarn feeding device is adapted to be connected to a two-rapier weaving machine and wherein one of said two loops is associated with the movement of a first rapier and the other of said two loops is associated with the movement of a second rapier.
  • the yarn feeding device is adapted to be connected to a multi-channel weaving machine.
  • a set-up which can achieve a very low maximum take-off speed from the yarn storage can be obtained.
  • the yarn transport element is set to move at a maximum speed less than half the maximum speed of a rapier.
  • the yarn transport element is a pin.
  • the yarn storage comprises a pre-winder and the yarn feeding device is adapted to draw yarn from the pre-winder.
  • the yarn storage is a bobbin and the yarn feeding device is adapted to draw yarn directly from the bobbin.
  • a yarn feeding arrangement comprising a yarn storage, a yarn feeding device according to any of the embodiments above, and a weaving machine having at least one rapier.
  • the yarn feeding arrangement further comprising a slip feed device interconnected between the yarn storage and the yarn feeding device.
  • a slip feed device interconnected between the yarn storage and the yarn feeding device.
  • a yarn feeding arrangement comprising a yarn storage, a yarn feeding device according to any of the embodiments above, and a weaving machine having at least one rapier.
  • the weaving machine is a multi-channel weaving machine and the weaving machine is adapted to switch channel after each pick of the weaving machine.
  • the yarn feeding device is configured to form a loop or loops for a channel at least partly during a time when another channel is active in the weaving machine.
  • the yarn feeding device can be configured to form a loop during a first time interval and wherein the loop is consumed by the weaving machine during a second time interval and wherein the first time interval has a duration being at least twice the duration of the second time interval.
  • the invention also extends to methods for controlling a weft yarn feeding arrangement in accordance with the above and to a controller and computer program product for controlling the weft yarn feeding device in accordance with the above.
  • An air jet or waterjet machine is also limited in speed due to the high take off tension coming from a conventional pre-winder.
  • the pre-winder for a jet machine is built on the same principle as a pre-winder for a rapier machine, with the addition of a system to measure and give a predetermined pick length.
  • the pick-length is commonly achieved by adjustment of the diameter of the drum and a yarn release and stopping element, normally called a stopper magnet, added to the rapier pre-winder concept. By setting the diameter of the drum and a fixed number of windings to leave the drum, a predetermined pick length is achieved.
  • the buffer mechanism formed by the weft yarn feeding device as described herein can therefore also be used for an air jet weaving machine or a waterjet weaving machine.
  • the weft yarn feeding device is then placed downstream the jet pre-winder, and the jet pre-winder is then adapted to output the right pick length to the jet weaving machine.
  • FIG. 1 an exemplary set-up is depicted.
  • the set-up in Fig. 1 depicts a multi-channel rapier weaving machine 10.
  • the weaving machine 10 is a double-sided rapier machine having two rapiers 11 and 12.
  • the weaving machine in Fig. 1 is working with two channels, but any number of channels of a multi-channel rapier weaving machine 10 are envisaged.
  • Each channel is fed with weft yarn from a weft yarn storage.
  • each weft yarn storage comprises a pre-winder 14.
  • the pre-winders 14 can in turn draw yarn from a bobbin 13.
  • Interconnected between the respective weft yarn storages and the weaving machine 10 are weft yarn feeding devices 16.
  • the weft yarn feeding devices 16 will be described in more detail below.
  • a weft yarn feeding device 16 can be adapted to form a weft yarn buffer divided into two different loops.
  • the yarn feeding devices are depicted forming weft yarn buffers with two loops.
  • One loop of weft yarn is used for each half of the insertion in the double-sided rapier machine.
  • Each weft yarn buffer can comprise one or more weft yarn loops.
  • a motor can drive two belts where each belt is adapted to form one weft yarn loop.
  • the belt speed and preferably also the motor speed is continuous.
  • the continuous speed of the belt can be controlled to a speed that is low to reduce take off speed from the yarn storage, but high enough to form the weft yarn loop before it is used by the weaving machine.
  • the belts have a yarn transport element, such as a pin, attached thereto that brings the weft yarn to form a loop.
  • the pin can go into an inclined ramp, for example a plate or wire, or similar and the pin continues without the yarn, ending up at a position starting to form a new weft yarn loop to be used later, here two weft cycles later.
  • the yarn is pushed from the pin it is at the same time pushed in to a clamp formed by the inclined ramp and for example a leaf spring. This clamp holds the yarn in place at a dedicated location until the rapier pulls the yarn out of the clamp at start of insertion, or for the second loop, after weft yarn tip transfer.
  • a dedicated motor is provided for each running belt.
  • the speed of the motor is controlled to meet the requirement that the weft yarn loop(s) is formed in time before the rapier of the weaving machine draws yarn from the buffer.
  • weft yarn is drawn from the yarn storage at a low maximum take-off speed. It can therefore be advantageous to control the motor to work in synchronization with the weaving machine such that the motor will drive the running belt at essentially constant speed and at a speed high enough to enable a loop of the yarn buffer to be ready at the time just before the time when yarn of the formed loop is picked by a rapier of the weaving machine.
  • the speed of the motor driving a running belt can be adjusted.
  • a reason for adjusting the speed of the motor driving a running belt can be that the speed of the weaving machine varies or that some other parameter is varying that impacts the time required for forming a yarn loop.
  • the motor drive used for running the belt can be electronically controlled, it can be synchronized with the weaving machine by electronic settings.
  • the time when a yarn transport element engages with the weft yarn and starts to pull weft yarn from the yarn storage can be optimized by electronical setting of the engagement point in relation to the weaving machine cycle angle.
  • the setting is electronical it can be adjusted during the running of the weaving machine and without stopping the weaving process.
  • the motor that drives the belt(s) and its control(s) is autonomous from the weaving machine, i.e. not coupled to the weaving machine and thereby free to make its own movements and speed patterns freely from the weaving machine.
  • the yarn feeding device can be controlled independently of any motor in the weaving machine, but still be controlled to take into account different events of the weaving process in the weaving machine by receiving signals from the weaving machine that can be used for control of the motor of the yarn feeding device.
  • the length of the loops can be adjusted to fit the cloth width, i.e. the length of weft yarn drawn in to the weaving shed by the rapier(s).
  • the optimal loop length may differ between different setups.
  • the length of the second loop can be shorter than the length of yarn drawn in by the rapiers.
  • the last part of the insertion is drawn from the weft yarn storage, for example a pre-winder, with a higher yarn tension which results in that the yarn is stretched before arrival and standstill.
  • one or more of the formed weft yarn loop(s) can be made slightly longer than the length of yarn drawn in by the rapiers to ensure lowest possible weft yarn tension during the whole insertion.
  • the length of the buffer loop can be controlled by a mechanical setting used to set the position at which the yarn transport element picks the yarn and starts to form the loop and the position at which the yarn transport element releases the yarn, i.e. where no more yarn is drawn from the yarn storage.
  • the release position is set by the release mechanism such as an inclined surface at the end of the running belt. The inclined surface will force the yarn to be released from the yarn transport element such as a pin.
  • the positions at which the yarn is picked and/or released can be set either manually or controlled by an actuator that controls the position(s).
  • the yarn release mechanism can also be made electronically by help of an actuator that is adapted to push the weft yarn from the yarn transport element. In accordance with some exemplary embodiments when an actuator or motor is used, a change of the loop length can be made during running of the weaving machine, without stopping the weaving machine.
  • the length of the running belt will at least to some extent control the speed at which loops are formed, since a yarn transport element needs to return to the yarn pick position before a new loop can start to be formed.
  • the running belt can be driven in synchronization with the weaving machine. Synchronization can be obtained by providing control parameters relating to the settings of the weaving machine before or during running of the weaving machine.
  • the synchronization can be obtained using a controller provided with control input signals and providing control output signals used for driving the belt motor(s).
  • setting parameters used as control parameters can comprise one or more of pick length, speed of the weaving machine, current weaving machine angle, weaving style/pattern. It can also be advantageous to use a signal indicative of when the rapier(s) of the weaving machine starts respectively stops moving in the control of a motor used for driving a running belt.
  • a controlled yarn brake can be placed between the first loop, i.e. the first loop used during insertion in a weaving machine cycle, and the weaving machine.
  • the controlled yarn brake can be activated before yarn tip transfer in order to brake the yarn so the yarn tension that is needed for a safe yarn tip transfer is reached.
  • Figs. 2a - 2d an exemplary configuration illustrating some of the above teachings is shown.
  • Fig 2a one channel of a multi-channel weaving machine including a yarn feeding arrangement is shown. The set-up corresponds to the set-up shown in Fig. 1 .
  • a controlled yarn brake 20 is provided after the yarn feeding device 16.
  • a second controlled yarn brake 18 can be placed in between the two yarn loop buffers. The second controlled yarn brake 18 can be activated when the first loop is filled up with yarn 40 and before the second loop is filled up with yarn 40.
  • the yarn feeding device 16 can be controlled such that the second loop takes yarn 40 from the pre-winder 14 and not from the first, already filled up loop.
  • the yarn brake 18 can be deactivated at the tip transfer so the yarn during the second rapier movement can be taken with low tension also from this buffer.
  • the yarn feeding device 16 is seen from the side.
  • the yarn feeding device comprises a running belt 22 driven by a motor 24.
  • Fig. 2c a detail of Fig. 2b illustrating an exemplary embodiment of a release mechanism is depicted.
  • yarn 40 has been picked by a yarn transport element 26, such as a pin.
  • An inclined surface 28 is provided at the end of the running belt 22.
  • the yarn transport element 26 reaches the inclined surface 28, the yarn transported by the yarn picking member is forced to be released from yarn transport element 26.
  • the yarn is held in position by a yarn restraining element 30.
  • the yarn restraining element 30 is here a clamp 30.
  • a detail A from Fig. 2a is shown.
  • the detail A is the release section of the running belt 22 of the yarn feeding device 16.
  • the yarn transport element 26, here formed by two pins 26 has released the yarn 40 at a set yarn release position.
  • the yarn is held in position by a yarn restraining element 30.
  • the yarn restraining element 30 is here a clamp 30.
  • yarn in the loop buffer can rest between two plates that have a distance of at least one yarn thickness. The yarn is then free and no extra force is needed to pull the yarn out from a clamp. The two plates prevent the yarn from twisting or snarling.
  • the yarn path can be adapted from case to case by providing a different set-up of the yarn feeding devices.
  • Fig. 3 an alternative set-up is depicted.
  • the running belts are configured to run in a direction essentially parallel to the direction in which weft yarn is inserted into the weaving machine, as opposed to the configuration in Fig. 2 , where the running belts run in a direction essentially perpendicular to the direction in which weft yarn is inserted into the weaving machine.
  • a set-up including a controller 32 is shown.
  • the controller 32 can be connected to the yarn feeding device 16 and adapted to control the yarn feeding device 16.
  • synchronization can be obtained using a controller provided with control input signals and providing control output signals used for driving the motor(s) of the yarn feeding devices 16.
  • Other drive settings of the yarn feeding device 16 such as loop length can also be made by the controller 32.
  • a flow chart is shown, illustrating some steps that can be performed when controlling a motor used to drive a yarn feeding arrangement as described herein.
  • the yarn feeding arrangement will form a yarn loop buffer.
  • control parameters used for driving the running belt are determined.
  • the control parameters can be any of the parameters described herein and the parameters can be updated, even in the drive mode of the running belt.
  • the parameters that can be determined can comprise one or more of pick length, speed of the weaving machine, current weaving machine angle, weaving style / pattern, length of the belt, position of the yarn transport element on the belt in relation to weaving machine position, release mechanism position and timing. It can also be advantageous to use signal(s) when the rapier(s) of the weaving machine starts respectively stops moving.
  • a drive speed of the motor and the synchronization with the weaving machine is set based on the parameter values.
  • the motor can be run at an essentially constant speed.
  • the length of the loop formed by the yarn feeding device is set by the controller 32.
  • the motor 24 is controlled to the set speed and synchronization with the weaving machine is performed.
  • the set speed and or synchronization can vary during the drive of the motor 24 if one or more of the control parameter changes.
  • a controller 32 for controlling a yarn feeding device is depicted.
  • the controller 32 can comprise an input/output 81 for receiving input signals indicative of the angular weaving cycle position of the weaving machine and other parameters used for controlling the yarn feeding device as set out above.
  • the input/output 81 outputs a motor control signal to the motor 24 for controlling the speed of the motor 24.
  • the input/output 81 can further output a control signal to adjust other settings of the yarn feeding device such as the length of the running belt and other settings described herein.
  • the controller 32 further comprises a micro-processor that also can be referred to as a processing unit 82.
  • the processing unit 82 is connected to and can execute computer program instructions stored in a memory 83.
  • the memory 83 can also store data that can be accessed by the processing unit 82.
  • the data in the memory can comprise pre-stored data relating to the weaving machine 10.
  • the computer program instructions can be adapted to cause the controller to control the yarn feeding device comprising a motor in accordance with the teachings herein.
  • the controller can be located at any suitable location.
  • the controller can be integrated in the motor 24.
  • the controller can input output data using any suitable means, both wireless and wireline communication devices can be used.
  • a slip feed device is added.
  • the slip feed device is a driven roller that rotates with a (continuous) peripheral speed that is higher than the necessary yarn speed.
  • a (continuous) peripheral speed that is higher than the necessary yarn speed.
  • Fig. 8 a set up with slip feed device 38 interconnected between the yarn storage 14 and the yarn feeding device 16 is depicted.
  • Fig. 9 the weft yarn speed at different positions in an arrangement comprising a yarn storage 14, yarn feeding device 16 and a weaving machine 10 having two rapiers is depicted.
  • two alternating channels a first and a second channel, are used.
  • the diagram depicts two weaving machine cycles, which is two times 360 degrees.
  • the movement of the two rapiers for the first channel that is described in more detail here is illustrated by the curve 51.
  • Start of insertion when the first (giving) rapier picks the weft yarn for the first channel is at the position 57 and the end of the insertion is at the position 58.
  • Curve 50 refers to the second one of the two alternating channels.
  • the time available for forming the yarn buffer is the time between 58, when the insertion ends, and 57, when next insertion for the first channel starts.
  • the first buffer the one closest to the weaving machine (intended for the first, giving rapier) starts to be filled up just after end of insertion 58, and can typically go on until approximately half of the available time is used. This is illustrated by a curve 52.
  • the second buffer (intended for the second, receiving rapier) can start to be filled just after the first buffer is ready and continue until just before the first rapier cycle is ended, i.e. just before weft yarn tip transfer.
  • the filling of the second buffer is illustrated by a curve 53 and the yarn tip transfer takes place at a transfer position 59.
  • the weft yarn is inserted by a nozzle which blows the yarn into the shed of the weaving machine using compressed air or pressurized water.
  • the forming of the yarn buffer can then start when the insertion is ready and the stopper magnet has stopped the delivery of yarn to the weaving machine.
  • the first action is to activate the yarn brake 20, then the stopper magnet of the jet pre-winder opens and the forming of the weft yarn buffer can start by the loop forming element 26 drawing yarn from the pre-winder.
  • the forming of the weft yarn buffer continues while another channel is inserting yarn and must be ready before the start of the insertion for the channel in question.
  • the brake 20 is released and the weft yarn is blown into the jet weaving machine.
  • the full pick length can be stored in the weft yarn buffer formed by the yarn feeding device.
  • the last part of the pick is taken from the pre-winder.
  • the speed of the weft yarn taken from the yarn storage is illustrated by a curve 54. As can be seen the speed is for most of the time constant during the filling of the two buffers, and drops to zero during the weft yarn insertion by the second, receiving, rapier, when no buffer is filled.
  • the weft yarn speed from the yarn storage is much lower than the top speed 60 of the rapiers in curve 51. Typically, it can be only 25% to 35% of the top speed.
  • the force of the controlled yarn brake 20 is illustrated by a curve 55. Also, the force from the controlled yarn brake 18 is illustrated by a curve 56.
  • the controlled yarn brake 20 is activated to provide a high yarn braking force during the filling up of the first buffer, here illustrated by curve 52, to ensure that the weft yarn 40 is taken from the yarn storage and not from the weaving machine.
  • the controlled yarn brake 20 can also be used to control the weft yarn tension so the weft insertion works as desired.
  • the controlled yarn brake 18 is activated before start of filling the second buffer, here illustrated by a curve 53. This is done to ensure that the weft yarn 40 is taken from the yarn storage and not from the first buffer.
  • the length of the running belt(s) that form the loop(s) in combination with the distance it pulls the yarn and the starting point of the pulling (synchronized with the weaving machine) plus the speed (synchronized with the weaving machine) determines the loop length as well as when it is formed.

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  • Textile Engineering (AREA)
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Claims (16)

  1. Dispositif d'alimentation en fil (16) pour alimenter en fil de trame un métier à tisser (10), le dispositif d'alimentation en fil comprenant au moins une courroie sans fin mobile (22) entraînée par un moteur commandé (24), la courroie mobile (22) comprenant au moins un élément de transport de fil (26), le ou les éléments de transport de fil étant adaptés pour étirer du fil (40) depuis un stockage de fil (13, 14) et pour libérer le fil à un emplacement établi pour former une boucle ou des boucles de fil agissant comme tampon de fil pour le métier à tisser, le dispositif d'alimentation en fil comprenant en outre au moins un élément de retenue de fil (30) adapté pour maintenir le fil (40) dans une boucle, caractérisé en ce que le moteur est configuré pour entraîner la courroie mobile à une vitesse sensiblement constante.
  2. Dispositif d'alimentation en fil selon la revendication 1, dans lequel le au moins un élément de retenue de fil est une pince (30).
  3. Dispositif d'alimentation en fil selon la revendication 1, dans lequel le au moins un élément de retenue de fil est une brosse.
  4. Dispositif d'alimentation en fil selon la revendication 1, dans lequel le au moins un élément de retenue de fil est une surface présentant un élément situé au-dessus de ladite surface et espacé de ladite surface d'une distance correspondant au moins à l'épaisseur du fil.
  5. Dispositif d'alimentation en fil selon l'une quelconque des revendications 1-4, dans lequel une surface inclinée (28) est prévue pour former un mécanisme de libération.
  6. Agencement d'alimentation en fil comprenant un stockage de fil (13, 14), un dispositif d'alimentation en fil (16) selon l'une quelconque des revendications 1-5, et un métier à tisser (10).
  7. Agencement d'alimentation en fil selon la revendication 6, comprenant en outre un dispositif d'alimentation à glissement (38) interconnecté entre le stockage de fil (13, 14) et le dispositif d'alimentation en fil (16).
  8. Agencement d'alimentation en fil comprenant un stockage de fil (13, 14), un dispositif d'alimentation en fil (16) selon l'une quelconque des revendications 1-5, et un métier à tisser (10), dans lequel le métier à tisser est un métier à tisser à canaux multiples et le métier à tisser est adapté pour commuter de canal après chaque pincement du métier à tisser.
  9. Agencement d'alimentation en fil selon la revendication 8, dans lequel le dispositif d'alimentation en fil est configuré pour former une boucle ou des boucles pour un canal au moins partiellement pendant un temps où un autre canal est actif dans le métier à tisser.
  10. Agencement d'alimentation en fil selon la revendication 8 ou 9, dans lequel le dispositif d'alimentation en fil est configuré pour former une boucle pendant un premier intervalle de temps et dans lequel la boucle est consommée par le métier à tisser pendant un second intervalle de temps et dans lequel le premier intervalle de temps présente une durée qui est au moins le double de la durée du second intervalle de temps.
  11. Agencement d'alimentation en fil selon l'une quelconque des revendications 6-10, dans lequel le métier à tisser comprend au moins une lance (11, 12).
  12. Agencement d'alimentation en fil selon la revendication 11, dans lequel le dispositif d'alimentation en fil est adapté pour former deux boucles.
  13. Agencement d'alimentation en fil selon la revendication 12, dans lequel le métier à tisser est un métier à tisser à deux lances, le dispositif d'alimentation en fil est relié au métier à tisser à deux lances et dans lequel l'une desdites deux boucles est associée au mouvement d'une première lance (11) et l'autre desdites deux boucles est associée au mouvement d'une seconde lance (12).
  14. Agencement d'alimentation en fil selon l'une quelconque des revendications 6-13, dans lequel le métier à tisser est un métier à tisser à canaux multiples et le dispositif d'alimentation en fil est relié au métier à tisser à canaux multiples.
  15. Procédé de commande d'un entraînement d'un dispositif d'alimentation en fil (16) pour alimenter en fil de trame un métier à tisser (10), le dispositif d'alimentation en fil comprenant au moins une courroie sans fin mobile (22) entraînée par un moteur commandé (24), la courroie mobile comprenant au moins un élément de transport de fil (26), le ou les éléments de transport de fil étant adaptés pour étirer du fil (40) depuis un stockage de fil (14) et pour libérer le fil à un emplacement établi pour former une boucle ou des boucles de fil agissant comme un tampon de fil pour le métier à tisser, dans lequel au moins un élément de retenue de fil (30) est prévu pour maintenir le fil (40) dans une boucle, le procédé comprenant les étapes consistant à :
    - déterminer (501) des valeurs de paramètre de commande utilisées pour entraîner la courroie mobile sont déterminées.
    - établir (503) une vitesse d'entraînement du moteur pour travailler en synchronisation avec le métier à tisser de telle sorte que le moteur entraînera la courroie mobile à une vitesse sensiblement constante, et
    - commander (507) le moteur (24) à la vitesse établie.
  16. Produit de programme informatique comprenant un code de programme informatique adapté pour, lorsqu'il est exécuté sur un ordinateur, amener l'ordinateur à commander un entraînement d'un dispositif d'alimentation en fil selon la revendication 15.
EP17824625.2A 2016-07-06 2017-06-20 Dispositif d'alimentation de fil de trame à courroie sans fin et procédé de commande du dispositif Active EP3481980B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1650987 2016-07-06
PCT/SE2017/050669 WO2018009120A1 (fr) 2016-07-06 2017-06-20 Dispositif d'alimentation de fil de trame à courroie sans fin et procédé de commande du dispositif

Publications (3)

Publication Number Publication Date
EP3481980A1 EP3481980A1 (fr) 2019-05-15
EP3481980A4 EP3481980A4 (fr) 2020-02-26
EP3481980B1 true EP3481980B1 (fr) 2021-10-27

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Application Number Title Priority Date Filing Date
EP17824625.2A Active EP3481980B1 (fr) 2016-07-06 2017-06-20 Dispositif d'alimentation de fil de trame à courroie sans fin et procédé de commande du dispositif

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Country Link
EP (1) EP3481980B1 (fr)
CN (1) CN109415851B (fr)
WO (1) WO2018009120A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938561A (en) * 1971-04-10 1976-02-17 Walter Scheffel Device for drawing off weft thread
GB1355687A (en) 1971-07-22 1974-06-05 Tomkinsons Ltd Yarn feeding device for looms
NL7508359A (en) * 1975-07-13 1977-01-17 Rueti Te Strake Bv Yarn feeder to buffer store for weft insertion - has smooth relatively inclined rollers driven by common disc
DE2952094A1 (de) * 1979-12-22 1981-07-02 Becker, Hubert Verfahren und vorrichtung zum abmessen und bereithalten von schussfaeden
GB2131055A (en) * 1982-11-27 1984-06-13 Bonas Machine Co Weft yarn metering apparatus
DE4324160A1 (de) * 1993-07-19 1995-01-26 Iro Ab Eintragsystem für eine Düsenwebmaschine
GB9508197D0 (en) * 1995-04-21 1995-06-07 Brintons Ltd Yarn supply
IT1283381B1 (it) * 1996-07-31 1998-04-17 Roj Electrotex Nuova Srl Procedimento per controllare l'inserimento del filo di trama in un telaio di tessitura.
WO2000068478A1 (fr) * 1999-05-07 2000-11-16 Ppg Industries Ohio, Inc. Dispositif d'accumulation destine a un metier a tisser a jet d'air
SE0100509L (sv) * 2001-02-16 2002-02-05 Texo Ab Förfarande och anordning för att längdmäta och magasinera tråd vid väv- eller textilmaskiner
DE102012212169A1 (de) * 2012-07-11 2014-01-16 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Vorrichtung zum Zwischenspeichern von bandartigem Schussmaterial für eine Webmaschine und Webmaschine mit einer solchen Vorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3481980A1 (fr) 2019-05-15
EP3481980A4 (fr) 2020-02-26
CN109415851A (zh) 2019-03-01
WO2018009120A1 (fr) 2018-01-11
CN109415851B (zh) 2021-07-09

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