EP3478883B1 - Agencement et procédé d'optimisation d'un processus de tissage - Google Patents

Agencement et procédé d'optimisation d'un processus de tissage Download PDF

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Publication number
EP3478883B1
EP3478883B1 EP17728880.0A EP17728880A EP3478883B1 EP 3478883 B1 EP3478883 B1 EP 3478883B1 EP 17728880 A EP17728880 A EP 17728880A EP 3478883 B1 EP3478883 B1 EP 3478883B1
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EP
European Patent Office
Prior art keywords
weft
insertion channel
weft insertion
thread
weft thread
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Application number
EP17728880.0A
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German (de)
English (en)
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EP3478883A1 (fr
Inventor
Matthias MARESCAUX
Bram Cuvelier
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Picanol NV
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Picanol NV
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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
    • D03D47/38—Weft pattern mechanisms
    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/007—Loom optimisation

Definitions

  • the invention relates to an arrangement and a method for optimizing a weaving process. More particular, the invention relates to an arrangement and a method for avoiding weaving errors due to an incorrect threading of a weft thread preparation device of a weaving machine.
  • a fabric consists of warp threads and weft threads.
  • the weft threads are inserted in between warp threads during an insertion cycle of the weaving process.
  • Weft threads are fed to the weaving machine and are wound on bobbins which are typically placed on bobbin racks or bobbin creels arranged on one side of the weaving machine, generally on the left side.
  • a weaving machine Before starting to weave a new fabric style, a weaving machine has to be equipped with raw materials. From the rack, the weft thread of each bobbin is manually threaded to a prewinder that prepares the weft thread for the weft insertion.
  • a weaving machine can have one prewinder or up to sixteen prewinders.
  • one prewinder contains weft thread coming from one bobbin.
  • two or more weft threads coming from an associated bobbin can be wound simultaneously on a common prewinder.
  • two or more weft threads coming from an associated prewinder can be inserted simultaneously in a weaving shed, for example by means of a gripper or a main nozzle.
  • a leading end of a second bobbin is tied to the trailing end of a first bobbin, to enable longer machine running cycles without interventions to supply new bobbins.
  • a weaving machine is equipped with sixteen prewinders and with one or more racks that form together sixteen platforms for bobbins, wherein each platform comprises one or two pins, on which a bobbin is placed.
  • weft insertion channels are used to determine the sequence in which the different weft threads are inserted. This sequence is often referred to as a "color pattern".
  • One or more element(s) is/are assigned to each virtual channel, which is/are driven by the control device for drawing off a weft thread from a bobbin and/or to insert a weft thread threaded or otherwise coupled to said element.
  • said elements assigned to virtual channels are referred to as weft insertion channel elements.
  • a group of weft insertion channel elements assigned to one virtual channel is referred to as weft insertion channel group.
  • weft threads are manually threaded to prewinders of a weft thread preparation device and are threaded from the prewinders through weft thread brakes to one weft presenter, also named weft thread presenter.
  • the prewinders are operated in order to wind the weft thread on the prewinder and thereby to draw off weft thread from the bobbin.
  • An operation is triggered for example upon reaching a defined minimum length of weft reserve on the prewinder. This can be detected by means of a sensor arranged at the prewinder.
  • the weft presenters are driven for example by a control device to present a particular weft thread coming from the associated prewinder to a bringer gripper for an insertion of said weft thread.
  • the weft insertion channel elements comprise the prewinders and the weft presenters.
  • weft threads from prewinders are fed to one main nozzle or to a set of main nozzles, wherein the main nozzles are driven by the control device in order to select the weft thread to be inserted during a weaving machine cycle.
  • the weft insertion channel elements comprise the prewinders and the main nozzles.
  • weft thread threaded to the weft insertion channel element(s) In order to have a control device that regulates the complete insertion process, it is essential that the type of weft thread threaded to the weft insertion channel element(s) and, thus, added or allocated to a weft insertion channel is known.
  • threaded to a weft insertion channel element means that weft thread is coupled along its movement path in a certain way to the weft insertion channel element.
  • the weaving machine can determine, for each kind of weft thread, the weft insertion channel corresponding to that kind of weft thread, and can convert the entered weft insertion pattern as a function of the kind of weft thread to a weft insertion pattern as a function of the weft insertion channels.
  • the object of the present invention to provide an arrangement and a method for avoiding weaving errors due to an incorrect threading of a weft thread preparation device of a weaving machine.
  • each weft insertion channel group comprises a first weft insertion channel element and a second weft insertion channel element downstream of the first weft insertion channel element, wherein each first weft insertion channel element is adapted to temporarily store weft thread coming from at least one associated bobbin, wherein weft thread coming from at least one of the first weft insertion channel elements can be fed to at least two different second weft insertion channel elements for forming a weft insertion channel group, wherein each of the number of first weft insertion channel elements is arranged to be operated in a regular mode, wherein in the regular mode each of the number of first weft insertion channel elements is driven for drawing off at least one weft thread fed to said first weft insertion channel element from the associated bobbin upon or after a defined minimum length of weft reserve
  • a weft thread fed by a bobbin could be manually threaded or otherwise coupled to any of a number of first weft insertion channel elements, in particular prewinders, and from the first weft insertion channel elements to any of the number of second weft insertion channel elements, for example to a weft presenter or a main nozzle.
  • first weft insertion channel elements in particular prewinders
  • second weft insertion channel elements for example to a weft presenter or a main nozzle.
  • the control device assumes that a first weft thread of a first type is inserted using a first weft insertion channel group comprising a first prewinder and a first weft presenter, and a second weft thread of a second type is inserted using a second weft insertion channel group comprising a second prewinder and a second weft presenter.
  • the first weft insertion channel elements can be operated in a set-up mode.
  • the set-up mode is also referred to as "wait for identification mode". In this mode, a normal weaving or a weaving of a test pattern is possible until weft thread is drawn off from the first weft insertion channel element being in the set-up mode. In other words, until weft thread temporarily stored in said first weft insertion channel element has been inserted.
  • the second weft insertion channel element used for said insertion is identified and the two elements are allocated to the same weft insertion channel group.
  • a defined minimum length of weft reserve stored in said first weft insertion channel element may be reached, which in a regular mode would cause driving said first weft insertion channel element for drawing off weft thread from an associated bobbin.
  • drawing off weft thread from the associated bobbin is delayed until at least the step of adding or allocating the first weft insertion channel element and the second weft insertion channel element to a weft insertion channel group is completed.
  • At least some of the first weft insertion channel elements are associated with a detector arranged at or downstream of the respective first weft insertion channel elements, wherein an insertion of weft thread coming from one of the number of first weft insertion channel elements is detected by means of said detector, in particular by means of a weft reserve detector provided at the first weft insertion channel element, by means of a winding detector provided at the first weft insertion channel element and/or by means of a weft thread movement detector arranged downstream of the first weft insertion channel element.
  • the first weft reserve detector in one embodiment is used to detect that a defined minimum length of weft reserve stored in a first weft insertion channel element is reached, which will trigger an operation of said first weft insertion channel element for drawing off weft thread from an associated bobbin.
  • control device is arranged to compare first weft insertion channel elements and second weft insertion channel elements allocated to one weft insertion channel group in the set-up mode with first weft insertion channel elements and second weft insertion channel elements previously allocated to said weft insertion channel group and/or expected to be allocated to said weft insertion channel group.
  • control device is arranged to compare the elements allocated to one weft insertion channel group with the elements allocated to one machine channel or weft insertion channel in the control device.
  • the control device adjusts a weft insertion pattern defined by weft threads having an expected threading to match the weft insertion pattern to the identified threading of the weft threads.
  • an error signal is issued and a user is prompted to correct the threading.
  • the arrangement further comprises a bobbin rack with a number of platforms each having a weft thread property identifying sensor, wherein weft threads of bobbins placed on at least some of the platforms, and preferably on all platforms, are fed to at least some of the weft insertion channel groups, wherein at least at some of the platforms a weft thread movement detector arranged for detecting a weft thread movement is provided, wherein the first weft insertion channel elements of the weft insertion channel groups are arranged to be driven for drawing off the at least one weft thread fed to said weft insertion channel group from the associated bobbin placed on a platform, and wherein the control device is arranged
  • Platforms can be provided with one pin or more than one pin, in particular two pins.
  • a weft thread from a bobbin placed on any pin of any platform could be manually threaded or otherwise coupled to any of a number of first weft insertion channel elements, in particular prewinders, and from the first weft insertion channel elements, in particular from the prewinder, to any of the number of second weft insertion channel elements, for example to a weft presenter or a main nozzle.
  • first weft insertion channel elements in particular prewinders
  • second weft insertion channel elements for example to a weft presenter or a main nozzle.
  • weft threads fed from at least some of the bobbins placed on the platform can be manually threaded or otherwise coupled to at least two different prewinders without difficulty. This may result in weaving errors. For example, when weaving with a particular weft insertion pattern, the control device assumes that a first weft thread of a first type has been threaded to a first prewinder and a second weft thread of a second type has been threaded to a second prewinder.
  • the platforms of the bobbins from which weft threads are drawn off are determined by means of the control device and properties of the weft thread arranged on the determined platform are identified. This allows an unambiguous determination of properties of weft threads inserted using weft insertion channel elements allocated in the control device to a particular weft insertion channel. Thereby, the actual set-up of the weaving machine can be determined, and, weaving errors can be avoided.
  • Suitable weft thread movement detectors also named movement detectors, may be chosen by the person skilled in the art.
  • an optical detector is provided for detecting a ballooning or movement of a weft thread during operation.
  • a piezo-electronic detector is provided for detecting an electrical charge induced upon the movement of the weft thread.
  • a detector using capacitive effects is provided, wherein for example a change in the capacitance upon movement of the weft thread is detected.
  • natural electrical charges on the weft thread are detected using for example charge detectors. Suitable detectors are described for example in EP 0195469 A2 and/or US 4215728 A , which are incorporated herein by reference. However, the invention is not limited to the use of such detectors.
  • control device is further arranged to compare identified weft thread properties with weft thread property information allocated to weft insertion channels in the control device.
  • weft insertion channels are used in the control device to determine the sequence by which the different weft threads are inserted and the weft insertion channel elements assigned to the weft insertion channels are driven accordingly.
  • weaving errors due to an incorrect threading can be avoided. For example, in case the control device has identified that a red weft thread is threaded to the weft insertion channel element associated to a first weft insertion channel. However for obtaining a desired fabric, a green weft thread has to be inserted using said weft insertion channel elements, an error message can be generated and weaving may be inhibited until the threading is corrected.
  • control device is arranged for adjusting a previous or expected allocation of weft insertion channel elements to a weft insertion channel based on an identified threading of a weft thread. For example, a first prewinder has been previously used to insert a weft thread coming from a first platform, and, thus, has been allocated to the associated weft insertion channel. However, upon a new set-up, the weft thread has been threaded to a second prewinder. In this case, in an embodiment the second prewinder will be allocated to the weft insertion channel instead of the first prewinder by the control device without further action required by the user.
  • control device is arranged for adjusting a weaving sequence for obtaining a particular fabric based on identified weft thread properties. For example, in case the control device has identified that a red weft thread is threaded to the weft insertion channel element associated to a first weft insertion channel, however for obtaining a particular fabric a green weft thread is required, and a green weft thread is threaded to the weft insertion channel element associated to a second weft insertion channel, however for weaving said particular fabric a red weft thread is required, in the weaving sequence the first weft insertion channel and the second weft insertion channel are exchanged. Of course, such an adjustment is not possible in case that no red weft thread has been provided.
  • the weft thread property identifying sensors are arranged to identify at least one weft thread property selected from the group comprising amongst others thread thickness, thread hairiness, thread twist, thread color, thread production time, thread supplier, thread material and/or other thread properties.
  • the weft thread property identifying sensors each comprise a contactless reader element arranged for reading data that is associated with a weft thread property from a tag attached to a bobbin placed on the associated platform. Reader elements and tags allow for a simple communication of a large number of weft thread properties of the weft threads wound on a bobbin. This allows the use of expert knowledge related to the physical properties of the weft thread in the control device.
  • the reader element in an embodiment is an optical reader element, for example a barcode reader element or a QR code reader element.
  • radio frequency technology is applied, and in particular an RFID reader element is provided.
  • sensors detecting the color, the hairiness or other weft thread properties may be provided. It is well known to provide more than one bobbin on a common platform, wherein a trailing end of a first bobbin is attached to the leading end of a second bobbin. In case several bobbins are placed on a common platform, in an embodiment only the weft thread properties of the first bobbin from which the weft thread is unwound is identified.
  • the weft thread property identifying sensors each are arranged for reading data from the tags attached to each bobbin placed on any one of the pins of the associated platform and/or for each bobbin placed on any one of the pins of the associated platform an associated weft thread property identifying sensor is provided.
  • each weft insertion channel group comprises a first weft insertion channel element and a second weft insertion channel element downstream of the first weft insertion channel element, wherein each first weft insertion channel element is adapted to temporarily store weft thread coming from at least one associated bobbin, wherein a weft thread coming from at least one of the first weft insertion channel elements can be fed to at least two different second weft insertion channel elements for forming a weft insertion channel group, wherein each of the number of first weft insertion channel elements is arranged to be operated in a regular mode, wherein in the regular mode each of the number of first weft insertion channel elements is driven for drawing off at least one weft thread fed to said first weft insertion channel element from the associated bobbin upon or after a defined minimum length of wef
  • the first weft insertion channel elements can be manually or automatically, for example by means of the control device, switched to the set-up mode upon or after each operation that may result in a modification of the threading of the weft threads.
  • the first weft insertion channel elements are manually or automatically switched to the set-up mode after a new bobbin has been threaded to at least one weft insertion channel group and/or after threading operations within at least one weft insertion channel group.
  • first weft insertion channel element and the second weft insertion channel element allocated to one weft insertion channel group in the set-up mode are compared by means of the control device with first weft insertion channel elements and second weft insertion channel elements previously allocated to said weft insertion channel group or expected to be allocated to said weft insertion channel group.
  • the elements are compared with elements allocated to a virtual channel or weft insertion channel used in the control device. This allows for a detection of threading errors.
  • driving the selected one of the number of first weft insertion channel elements for drawing off weft thread from an associated bobbin is avoided in case the first weft insertion channel element and second weft insertion channel element allocated to one weft insertion channel in the set-up mode deviates from first weft insertion channel elements and second weft insertion channel elements previously allocated to said weft insertion channel group or expected to be allocated to said weft insertion channel group.
  • a bobbin rack with a number of platforms each having a weft thread property identifying sensor wherein a bobbin is placed on any one of the platforms and the weft thread of said bobbin is fed to one of the number of weft insertion channel groups, wherein the method further comprises driving the selected one of the number of first weft insertion channel elements for drawing off weft thread from an associated bobbin, wherein upon or after drawing off the weft thread from said bobbin, the platform of said bobbin from which the at least one weft thread is drawn off is determined by evaluating detector signals of weft thread movement detectors arranged for detecting a weft thread movement, which are provided at at least some of the platforms, and at least one weft thread property of the at least one weft thread fed to said first weft insertion channel element is identified by evaluating a sensor signal of the weft thread property identifying sensor provided at the determined platform.
  • the identified weft thread properties are compared by means of the control device with weft thread property information allocated to weft insertion channels in the control device. In case the identified weft thread properties do not match with the weft thread property information, an error message can be generated and weaving can be inhibited until a user has corrected the threading.
  • control device adjusts the allocation of a weft insertion channel element to a weft insertion channel based on an identified threading of the weft thread. This could be done either by the control device without further notification to the user or only after the user has approved the adjustment.
  • a user is prompted to modify a position of two or more bobbins on the bobbin rack to optimize weaving a given weaving pattern. For example, it might be favorable to thread a weft thread dominating a particular weaving pattern to a weft presenter travelling only over a short distance when presenting a weft thread.
  • the user can opt to follow the proposed modification or to maintain a set-up.
  • weft thread properties are read by means of the weft thread property identifying sensor from a tag attached to the bobbin from which the weft thread is drawn off, wherein in particular the weft thread properties are read using a contactless reader element, in particular an RFID reader element.
  • the weft thread properties may comprise amongst others information about the weft thread, such as color, thickness, hairiness and/or its production date, as well as its spinning date as its bobbin date. The determination of such weft thread properties also allows, for example, to start-up a weaving machine with specific settings that are stored in the control device of the weaving machine for weft threads with such weft thread properties.
  • Fig. 1 schematically shows an arrangement 1 for a gripper weaving machine.
  • the gripper weaving machine comprises a bringer gripper 2 and a receiver gripper 3.
  • For weaving a fabric 4 weft threads are inserted into a shed formed by warp threads 5.
  • the arrangement 1 comprises a control device 6.
  • the control device 6 in one embodiment is the central control device of the weaving machine.
  • a separate control device communicating with the central control device is provided.
  • auxiliary control devices are provided, which each are associated to individual elements of the arrangement 1 and conjointly form the control device 6.
  • the arrangement 1 shown in Fig. 1 further comprises a number of prewinders 7, 8, 9, a weft thread presenter device 10 with a number of weft presenters 11, 12, 13 and a bobbin rack 14 with a number of platforms 15, 16, 17, each having two pins, wherein a bobbin 18, 19, 20, 21, 22, 23 is provided at each pin.
  • three prewinders 7, 8, 9, three weft presenters 11, 12, 13 and three platforms 15, 16, 17 are provided.
  • less than three or more than three, in particular up to sixteen prewinders, weft presenters and platforms are provided.
  • Weft threads wound on a first bobbin 18, 20, 22 of each platform 15, 16, 17 are threaded to one of the number of prewinders 7, 8, 9 and are threaded from the prewinder 7, 8, 9 through weft thread brakes (not shown) to one of the number of weft presenters 13, 12, 11.
  • the trailing ends of the first bobbins 18, 20, 22 are tied to the leading ends of the second bobbins 19, 21, 23.
  • Each bobbin 18, 19, 20, 21, 22, 23 may in principle be used as "first bobbin".
  • At least one weft thread property identifying sensor 24, 25, 26 is provided at each platform 15, 16, 17.
  • an associated weft thread property identifying sensor is provided at each platform 15, 16, 17.
  • a weft thread movement detector 27, 28, 29 arranged for detecting a weft thread movement is provided at each platform 15, 16, 17.
  • the weft thread property identifying sensors 24, 25, 26 and the weft thread movement detectors 27, 28, 29 communicate with the control device 6.
  • the communications can be either wired or wireless.
  • additional weft thread movement detectors 30, 31, 32 are provided downstream of each prewinder 7, 8, 9.
  • a human machine interface 33 for data input and data output is provided.
  • a human machine interface 33 may consist of a computer, a tablet, a smartphone, a smartwatch, smart glasses and such apparatuses.
  • the prewinders 7, 8, 9 are driven to prepare a weft thread for the weft insertion by winding the weft thread on the prewinder 7, 8, 9, and, thereby, draw off weft thread from the respective bobbin 18, 20, 22.
  • the respective weft presenter 11, 12, 13 is driven by the control device 6 to present the weft thread to the bringer gripper 2 and the weft thread is inserted by means of the bringer gripper 2 into the shed, wherein the weft thread is drawn off from the prewinder 7, 8, 9.
  • Each prewinder 7, 8, 9 and each weft presenter 11, 12, 13 is assigned in the control device 6 to a weft insertion channel, also named weaving machine channel. These weft insertion channels are used in the control device 6 and determine the sequence in which the different weft threads are inserted.
  • the prewinder 7, 8, 9 and the weft presenter 11, 12, 13, which due to the threading are used for the insertion of weft thread coming from one platform 15, 16, 17 are referred to as weft insertion channel group.
  • weft insertion channel group In the configuration of Fig.
  • the prewinder 9 and the weft presenter 11 belong to one weft insertion channel group
  • the prewinder 8 and the weft presenter 12 belong to one weft insertion channel group
  • the prewinder 7 and the weft presenter 13 belong to one weft insertion channel group.
  • the weaving machine Before starting up a new fabric style, the weaving machine has to be equipped with raw materials.
  • the weft threads of the bobbins arranged on the platform are threaded to the prewinders 7, 8, 9 and/or are threaded from the prewinders 7, 8, 9 to the weft presenters 11, 12, 13, different configurations are possible.
  • Fig. 2 shows a possible alternative configuration of the arrangement 1 of Fig. 1 .
  • the configuration of Fig. 2 differs from that shown in Fig. 1 in that a weft thread coming from a bobbin 20 arranged in the middle is threaded to a prewinder 9 arranged at a bottom side and a weft thread coming from a bobbin 22 arranged at a bottom side is threaded to a prewinder 8 arranged in the middle.
  • a weft thread coming from a bobbin 20 arranged in the middle is threaded to a prewinder 9 arranged at a bottom side
  • a weft thread coming from a bobbin 22 arranged at a bottom side is threaded to a prewinder 8 arranged in the middle.
  • a prewinder 9 arranged at a bottom side
  • a weft thread coming from a bobbin 22 arranged at a bottom side is threaded to a prewinder 8 arranged in the middle.
  • the prewinder 9 and the weft presenter 11 belong to one weft insertion channel group
  • the prewinder 8 and the weft presenter 12 belong to one weft insertion channel group
  • the prewinder 7 and the weft presenter 13 belong to one weft insertion channel group.
  • one of the prewinders 7, 8, 9 is driven for drawing off the weft thread fed to said prewinder 7, 8, 9 from the associated bobbin 18, 20, 22 placed on the bobbin rack 14.
  • the prewinders 7, 8, 9 can be operated in a regular mode, wherein in the regular mode each of the number of prewinders 7, 8, 9 is driven for drawing off weft thread fed to said prewinder 7, 8, 9 from the associated bobbin 18, 20, 22 upon or after a defined minimum length of weft thread reserve stored in said prewinder 7, 8, 9 is reached.
  • An instant, at which a defined minimum length of weft reserve stored in a prewinder 7, 8, 9 is reached, is detected for example by means of a weft reserve sensor provided at said prewinder 7, 8, 9.
  • Auxiliary control devices (not shown) allocated to the prewinders 7, 8, 9 for driving the prewinders 7, 8, 9 in one embodiment are communicated with a central control device and, thus, together with the central control device form the control device 6.
  • auxiliary control devices (not shown) allocated to the prewinders 7, 8, 9 work autonomously and in the regular mode independent of the control device 6.
  • a movement of the respective weft thread drawn off from the associated bobbin 18, 20, 22 is detected by means of one of the weft thread movement detectors 27, 28, 29.
  • the platform 15, 16, 17 at which the bobbin 18, 20, 22 from which weft thread is drawn off is placed is determined.
  • weft thread properties of at least the first bobbin 18, 20, 22 arranged on said platform 15, 16, 17 can be identified by evaluating a sensor signal of the weft thread property identifying sensor 24, 25, 26 provided at the determined platform.
  • weft thread properties identified by the control device 6 are visualized to a user on the human machine interface 33 comprising a display.
  • Figs. 3 and 4 show possible display contents for an arrangement 1 similar to Fig. 1 and 2 comprising four platforms 101, 102, 103, 104, and four prewinders 201, 202, 203, 204.
  • Fig. 3 shows a possible display content after bobbins have been placed on the four platforms 101, 102, 103, 104 and the weft thread properties of bobbins have been identified.
  • the identified weft thread properties of bobbins at the platforms 101, 102, 103, 104 are indicated in a window 1A, 2A, 3A, 4A, 1B, 2B, 3B, 4B associated to a bobbin that is placed on a pin of the platform.
  • the identified weft thread properties are compared by the control device 6 (see Fig. 1 ) with weft thread property information allocated to weft insertion channels in the control device 6.
  • the windows 1A, 2A, 3A, 4A that are associated to the pin on which a bobbin is placed, wherein the identified weft thread properties match with the weft thread property information in the control device 6, are for example marked green.
  • the windows 1B, 2B, 3B, 4B that are associated to a pin on which no bobbin is placed are for example marked grey.
  • Fig. 4 shows a possible display content similar to Fig. 3 .
  • a wrong bobbin has been placed on platform 104.
  • the wrong bobbin will be indicated for example by marking the window 4A red, that is shown hatched in Fig. 4 .
  • starting the weaving process is inhibited.
  • an arrow 36 for example a white arrow.
  • weft thread movement detectors 27, 28, 29 see Fig. 1
  • prewinders 201, 202, 203, 204 are associated to which platform 101, 102, 103 ,104.
  • the correct threading is indicated to the user for example by means of an arrow 34, that is shown hatched in Fig. 3 but in reality is for example a green arrow.
  • a weft thread is not yet threaded to a prewinder 201, 202, 203, 204, this will be signaled to a user by an arrow 35, for example an orange arrow, and starting the weaving process is inhibited. After the threading is correctly completed, a user may start weaving.
  • Fig. 5 shows another possible display content similar to Fig. 3 .
  • a user has threaded the prewinders 203 and 204 with weft thread coming from bobbins of another platform 103, 104 than expected by the control device 6.
  • This mismatch is shown on the display by means of arrows 37, that are shown vertically hatched in Fig. 5 but in reality are for example red arrows.
  • the user in an embodiment has three options:
  • the adjustment is carried out by the control device 6 after the user has made an input. In another embodiment the adjustment can also take place without further input from the user.
  • Fig. 6 shows a possible alternative configuration of the arrangement 1 of Fig. 1 .
  • the configuration of Fig. 6 differs from that shown in Fig. 1 in that a weft thread coming from a prewinder 9 arranged at the bottom side is threaded to a weft presenter 13 arranged closest to the fabric 4 and a weft thread coming from a prewinder 7 arranged at the top side is threaded to a weft presenter 11 arranged furthest from the fabric 4.
  • the configuration of Fig. 6 differs from that shown in Fig.
  • additional weft thread movement detectors 30, 31, 32 are provided downstream of the prewinders 7, 8, 9, that are each associated to one of the prewinders 7, 8, 9.
  • the weft thread movement detectors 30, 31, 32 are arranged at the exit of the respective prewinder 7, 8, 9.
  • the additional weft thread movement detectors 30, 31, 32 allow to determine from which prewinder 7, 8, 9 a weft thread is drawn off by the bringer gripper 2 while a particular weft presenter 11, 12, 13 presents a weft thread to the bringer gripper 2.
  • the configuration shown in Fig. 6 can be distinguished from the configuration shown in Fig. 1 by the control device 6.
  • the prewinders 7, 8, 9 can be switched to a set-up mode or "wait for identification mode", for example after threading operations due to weft thread breaks.
  • a set-up mode weaving can be continued or a test fabric can be woven until an insertion of weft thread from one prewinder 7, 8, 9 switched into the set-up mode is detected.
  • driving the prewinder 7, 8, 9 for drawing off weft thread from an associated bobbin 18, 19, 20, 21, 22, 23 is deferred or blocked.
  • the weft presenter 11, 12, 13 used for said insertion upon or after an insertion of weft thread coming from said prewinder 7, 8, 9 is detected by means of the associated weft thread movement detectors 30, 31, 32 the weft presenter 11, 12, 13 used for said insertion, this means the immediately preceding or present insertion, is identified and prior to driving said prewinder 7, 8, 9 for drawing off at least one weft thread fed to said prewinder 7, 8, 9 from the associated bobbin(s) 18, 19, 20, 21, 22, 23, the prewinder 7, 8, 9 and the weft presenter 11, 12, 13 used for said insertion are allocated in the control device 6 to one weft insertion channel group.
  • weft reserve detectors 50, 51, 52 are provided at the prewinders 7, 8, 9.
  • reaching a minimum length of weft reserve stored in one of the prewinders 7, 8, 9 is detected by means of the associated weft reserve detector 50, 51, 52.
  • the respective sensor signal triggers driving said prewinder 7, 8, 9 to draw off weft thread from the associated bobbin 18, 20, 22.
  • driving said prewinder 7, 8, 9 to draw off weft thread from the associated bobbin 18, 20, 22 is blocked or at least deferred.
  • the weft presenter 11, 12, 13 used for the immediately preceding or still ongoing present insertion is identified and said weft presenter 11, 12, 13 as well as the prewinder 7, 8, 9 at which reaching a defined minimum length of weft reserve stored are allocated in the control device 6 to a common weft insertion channel group.
  • control device 6 is further arranged to compare the prewinder 7,8, 9 and the weft presenter 11, 12, 13 as allocated to one weft insertion channel group in the set-up mode with expected configurations of a weft insertion channel group.
  • said prewinder 7, 8, 9 can be set to a regular mode or normal operation mode and be driven for drawing off weft thread from an associated bobbin 18, 19, 20, 21, 22, 23.
  • the configuration as shown in Fig. 1 is expected, but the configuration shown in Fig. 6 is detected, the user can be prompted to take appropriate measures for a correction.
  • the user in preferred embodiments has several options.
  • two options are available, namely
  • Figs. 1 , 2 and 6 schematically show the use of the arrangement 1 in a gripper weaving machine.
  • the arrangement 1 may be used in an airjet weaving machine, as shown in Fig. 7 .
  • the arrangement 1 for an airjet weaving machine shown in Fig. 7 is similar to the arrangement of Fig. 1 and for identical or similar elements the same reference numerals are used.
  • weft threads are inserted by means of nozzle arrangements comprising main nozzles 41, 42, 43.
  • each prewinder 7, 8, 9 is provided with a weft reserve detector 50, 51, 52 for detecting an instant at which a defined minimum length of weft reserve stored in a prewinder 7, 8, 9 is reached.
  • the weft reserve detectors 50, 51, 52 can be used for detecting a drawing off of weft thread coming from the prewinder 7, 8, 9.
  • the weft reserve detectors 50, 51, 52 it is possible to identify the prewinder 7, 8, 9 from which weft thread is threaded to a main nozzle 41, 42, 43.
  • weft reserve detectors 50, 51, 52 so called winding detectors 53, 54, 55 that detect the drawing off of windings from a prewinder 7, 8, 9 are provided, which can also be used as weft thread movement detectors in order to determine from which prewinder a main nozzle draws off weft thread to be inserted into a shed.
  • Weft reserve detectors and winding detectors are generally known, for example from US 4715411 .

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

Claims (15)

  1. Arrangement pour optimiser un processus de tissage comprenant un dispositif de commande (6) et un nombre de groupes de canaux d'insertion de trame, dans lequel chaque groupe de canaux d'insertion de trame comprend un premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et un deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) en aval du premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204), dans lequel chaque premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est adapté pour stocker temporairement fil de trame provenant d'au moins une bobine associée (18, 19, 20, 21, 22, 23), dans lequel fil de trame provenant d'au moins un des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) peut être amené à au moins deux deuxièmes éléments de canal d'insertion de trame (11, 12, 13, 41, 42, 43) différents pour former un groupe de canaux d'insertion de trame, et dans lequel chacun des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est disposé pour fonctionner dans un mode régulier, dans lequel en mode régulier chacun du nombre des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est entraîné pour tirer au moins un fil de trame amené audit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) de la bobine associée (18, 19, 20, 21, 22, 23) lors ou après une longueur minimale définie de la réserve de trame stockée dans ledit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est atteint, caractérisé en ce que chacun du nombre des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est en outre disposé pour fonctionner dans un mode de configuration, dans lequel dans le mode de configuration, lors ou après une insertion de fil de trame provenant de l'un du nombre des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est détecté un deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) utilisé pour ladite insertion est identifié et avant de faire fonctionner ledit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) en mode régulier, ledit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et ledit deuxième élément de canal d'insertion de trame identifié (11, 12, 13, 41, 42, 43) utilisés pour ladite insertion sont attribués dans le dispositif de commande (6) à un groupe de canaux d'insertion de trame.
  2. Arrangement selon la revendication 1, caractérisé en ce que les premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) sont des prédélivreurs.
  3. Arrangement selon la revendication 1 ou 2, caractérisé en ce qu'une insertion de fil de trame provenant d'un du nombre des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est détectée au moyen d'un détecteur, en particulier au moyen d'un détecteur de réserve de trame (50, 51, 52) prévu au premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204), au moyen d'un détecteur d'enroulement (53, 54, 55) prévu au premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et/ou au moyen d'un détecteur de mouvement de fil de trame (30, 31, 32) disposé en aval du premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204).
  4. Arrangement selon la revendication 1, 2 ou 3, caractérisé en ce que le dispositif de commande (6) est disposé pour comparer des premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et des deuxième éléments de canal d'insertion de trame (11, 12, 13, 41, 42, 43) attribués à un groupe de canaux d'insertion de trame dans le mode de configuration avec des premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et des deuxième éléments de canal d'insertion de trame (11, 12, 13, 41, 42, 43) précédemment attribués audit groupe de canaux d'insertion de trame et/ou censés à être attribués audit groupe de canaux d'insertion de trame.
  5. Arrangement selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'arrangement comprend en outre un cantre (14) avec un nombre de plate-formes (15, 16, 17, 101, 102, 103, 104) chacun ayant un capteur d'identification de propriété de fil de trame (24, 25, 26, 44, 45, 46), dans lequel des fils de trame des bobines (18, 19, 20, 21, 22, 23) placées sur au moins certaines des plate-formes (15, 16, 17, 101, 102, 103, 104) sont amenés à au moins certains des groupes de canaux d'insertion de trame, dans lequel les premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) des groupes de canaux d'insertion de trame sont disposés à être entraînés pour tirer l'au moins un fil de trame amené au dudit groupe de canaux d'insertion de trame de la bobine associée (18, 19, 20, 21, 22, 23) placée sur une plate-forme (15, 16, 17, 101, 102, 103, 104), dans lequel au moins sur certaines des plate-formes (15, 16, 17, 101, 102, 103, 104) un détecteur de mouvement du fil de trame (27, 28, 29) disposé pour détecter un mouvement du fil de trame est prévu, et dans lequel le dispositif de commande (6) est disposé pour déterminer la plate-forme (15, 16, 17, 101, 102, 103, 104) de la bobine (18, 19, 20, 21, 22, 23) à partir de laquelle l'au moins un fil de trame est tiré en évaluant des signaux de détection des détecteurs de mouvement du fil de trame (27, 28, 29) prévus sur les plate-formes (15, 16, 17, 101, 102, 103, 104), et pour identifier au moins une propriété de fil de trame de l'au moins un fil de trame amené au groupe de canaux d'insertion de trame en évaluant un signal de capteur du capteur d'identification de propriété de fil de trame (24, 25, 26, 44, 45, 46) prévu sur la plate-forme déterminée (15, 16, 17, 101, 102, 103, 104).
  6. Arrangement selon la revendication 5, caractérisé en ce que le dispositif de commande (6) est disposé pour comparer des propriétés de fil de trame identifiées avec information sur la propriété de fil de trame attribuée aux canaux d'insertion de trame dans le dispositif de commande (6).
  7. Arrangement selon la revendication 5 ou 6, caractérisé en ce que les capteurs d'identification de propriété de fil de trame (24, 25, 26, 44, 45, 46) comprennent chacun un élément de lecture sans contact, en particulier un élément de lecture RFID disposé pour lire des propriétés de fil de trame d'une étiquette fixée à une bobine (18, 19, 20, 21, 22, 23) placée sur la plate-forme associée (15, 16, 17, 101, 102, 103, 104).
  8. Procédé pour optimiser un processus de tissage dans une machine à tisser comprenant un dispositif de commande (6) et un nombre de groupes de canaux d'insertion de trame, dans lequel chaque groupe de canaux d'insertion de trame comprend un premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et un deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) en aval du premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204), dans lequel chaque premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est adapté pour stocker temporairement fil de trame provenant d'au moins une bobine associée (18, 19, 20, 21, 22, 23), dans lequel le fil de trame provenant d'au moins un des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) peut être amené à au moins deux deuxièmes éléments de canal d'insertion de trame (11, 12, 13, 41, 42, 43) différents pour former un groupe de canaux d'insertion de trame, dans lequel chacun du nombre des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est disposé pour fonctionner dans un mode régulier, dans lequel en mode régulier chacun du nombre des premiers éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est entraîné pour tirer au moins un fil de trame amené audit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) de la bobine associée (18, 19, 20, 21, 22, 23) lors ou après une longueur minimale définie de réserve de trame stockée dans ledit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est atteint, caractérisé en ce que le procédé comprend le fonctionnement d'au moins un du nombre des premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) dans un mode de configuration, dans lequel dans le mode de configuration, lors ou après une insertion de fil de trame provenant dudit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) est détecté un deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) utilisé pour ladite insertion est identifié et avant de faire fonctionner ledit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) en mode régulier, ledit premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et ledit deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) identifié utilisés pour ladite insertion sont attribués dans le dispositif de commande (6) à un groupe de canaux d'insertion de trame.
  9. Procédé selon la revendication 8, caractérisé en ce que les premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) sont commutés en mode de configuration après qu'une nouvelle bobine a été enfilée sur au moins un groupe de canaux d'insertion de trame et/ou après des opérations d'enfilage dans au moins un groupe de canaux d'insertion de trame.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que le premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et le deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) attribués à un groupe de canaux d'insertion de trame dans le mode de configuration sont comparés au moyen du dispositif de commande (6) avec premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et deuxième éléments de canal d'insertion de trame (11, 12, 13, 41, 42, 43) précédemment attribués audit groupe de canaux d'insertion de trame ou à prévoir être attribués audit groupe de canaux d'insertion de trame.
  11. Procédé selon la revendication 10, caractérisé en ce que l'entraînement de l'élément sélectionné parmi le nombre de premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) pour tirer le fil de trame d'une bobine associée (18, 19 , 20, 21, 22, 23) est évité dans le cas où le premier élément de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et le deuxième élément de canal d'insertion de trame (11, 12, 13, 41, 42, 43) attribués à un canal d'insertion de trame dans le mode de configuration dévie des premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) et des deuxième éléments de canal d'insertion de trame (11, 12, 13, 41, 42, 43) précédemment attribués audit groupe de canaux d'insertion de trame ou à prévoir être attribués audit groupe de canaux d'insertion de trame.
  12. Procédé selon l'une quelconque des revendications 8 à 11, caractérisé en ce qu'un cantre (14) avec un nombre de plate-formes (15, 16, 17, 101, 102, 103, 104) chacun ayant un capteur d'identification de propriété de fil de trame (24, 25, 26, 44, 45, 46) est prévu, dans lequel une bobine (18, 19, 20, 21, 22, 23) est placée sur certaines des plate-formes (15, 16, 17, 101, 102, 103, 104) et le fil de trame de ladite bobine (18, 19, 20, 21, 22, 23) est amené à un du nombre de groupes de canaux d'insertion de trame, dans lequel le procédé comprend en outre l'entraînement d'un du nombre de premier éléments de canal d'insertion de trame (7, 8, 9, 201, 202, 203, 204) pour tirer fil de trame d'une bobine associée (18, 19, 20, 21, 22, 23), dans lequel lors ou après avoir tiré le fil de trame de ladite bobine (18, 19, 20, 21, 22, 23), la plate-forme (15, 16, 17, 101, 102, 103, 104) de ladite bobine (18, 19, 20, 21, 22, 23) à partir de laquelle l'au moins un fil de trame est tiré est déterminée en évaluant des signaux de détection des détecteurs de mouvement du fil de trame (27, 28, 29) disposé pour détecter un mouvement du fil de trame, qui sont prévus sur certaines des plate-formes (15, 16, 17, 101, 102, 103, 104), et au moins une propriété de fil de trame de l'au moins un fil de trame amené audit premier élément de canal d'insertion de trame (7, 8, 9, 11, 12, 13, 41, 42, 43, 201, 202, 203, 204) est identifiée en évaluant un signal de capteur du capteur d'identification de propriété de fil de trame (24, 25, 26, 44, 45, 46) prévu sur la plate-forme déterminée (15, 16, 17, 101, 102, 103, 104).
  13. Procédé selon la revendication 12, caractérisé en ce que les propriétés de fil de trame identifiées sont comparées au moyen du dispositif de commande (6) avec information sur la propriété de fil de trame attribuée aux canaux d'insertion de trame dans le dispositif de commande (6).
  14. Procédé selon la revendication 13, caractérisé en ce que le dispositif de commande (6) ajuste une attribution d'éléments de canal d'insertion de trame (7, 8, 9, 11, 12, 13, 41, 42, 43, 201, 202, 203, 204) à un canal d'insertion de trame sur la base de filetages de fil de trame identifiés et/ou un utilisateur est invité à modifier une position de deux ou plus bobines (18, 19, 20, 21, 22, 23) sur le cantre (14) pour optimiser le tissage d'un rapport de tissage donné.
  15. Procédé selon l'une quelconque des revendications 12 à 14, caractérisé en ce que des propriétés de fil de trame sont lues au moyen du capteur d'identification de propriété de fil de trame (24, 25, 26, 44, 45, 46) d'une étiquette fixée à la bobine (18, 19, 20, 21, 22, 23) de laquelle le fil de trame est tiré, dans lequel en particulier les propriétés de fil de trame sont lues en utilisant un élément de lecture sans contact, en particulier un élément de lecture RFID.
EP17728880.0A 2016-07-04 2017-06-12 Agencement et procédé d'optimisation d'un processus de tissage Active EP3478883B1 (fr)

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BE2016/0122A BE1024414B1 (nl) 2016-07-04 2016-07-04 Opstelling en werkwijze voor het optimaliseren van een weefproces.
PCT/EP2017/064278 WO2018007105A1 (fr) 2016-07-04 2017-06-12 Agencement et procédé d'optimisation d'un processus de tissage

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BE874724A (nl) * 1979-03-09 1979-07-02 Barco Electronic N V Barco Werkwijze voor het besturen van een inslagkiezer van een weefmachine en inrichting voor het toepassen van deze werkwijze
DE3016182C2 (de) * 1980-04-26 1983-01-05 Adolf Dipl.-Ing. 7450 Hechingen Linka Verfahren und Vorrichtung zum pneumatischen Eintragen des Schußfadens in die Schußfadenträger einer mehrsystemigen Webmaschine
BE900492A (nl) 1984-09-04 1985-03-04 Picanol Nv Snelheidsregeling van inslagvoorafwikkelaar bij weefgetouwen.
DE3662600D1 (en) 1985-03-19 1989-05-03 Picanol Nv Weaving machine with improved feed for the woof
BE904260A (nl) * 1986-02-21 1986-08-21 Picanol Nv Inrichting voor de insertie van inslagdraden in de gaap bij luchtweefmachines en regelbare blazers hierbij toegepast.
BE1014133A3 (nl) * 2001-04-20 2003-05-06 Picanol Nv Werkwijze voor het optimaliseren van een textielproductieproces en inrichtingen die deze werkwijze toepassen.
JP2008038329A (ja) * 2006-07-11 2008-02-21 Tsudakoma Corp 流体噴射式織機の多色緯入装置
JP6108863B2 (ja) * 2013-02-19 2017-04-05 津田駒工業株式会社 水噴射式織機用の緯糸屈曲装置

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WO2018007105A1 (fr) 2018-01-11
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BE1024414A1 (nl) 2018-02-08
CN109415853A (zh) 2019-03-01

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