EP0656437B1 - Procédé pour fournir et insérer du fil de trame dans le tissu d'un métier à tisser et fournisseur - Google Patents

Procédé pour fournir et insérer du fil de trame dans le tissu d'un métier à tisser et fournisseur Download PDF

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Publication number
EP0656437B1
EP0656437B1 EP94117970A EP94117970A EP0656437B1 EP 0656437 B1 EP0656437 B1 EP 0656437B1 EP 94117970 A EP94117970 A EP 94117970A EP 94117970 A EP94117970 A EP 94117970A EP 0656437 B1 EP0656437 B1 EP 0656437B1
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EP
European Patent Office
Prior art keywords
weft
thread
weft thread
fabric
quality
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
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EP94117970A
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German (de)
English (en)
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EP0656437A1 (fr
Inventor
Jo Tacq
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Picanol NV
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Picanol NV
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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
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/086—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to completion of unwinding of a package
    • 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
    • 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
    • D03D47/342—Handling the weft between bulk storage and weft-inserting means knot detection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method for feeding weft threads and for inserting them into a fabric in a weaving machine with a feed device for alternately feeding at least two weft threads, each of which can be fed by means of its own feeding means, each with a thread supply and means for selecting one to be inserted into the fabric Contain weft thread, which can be actuated by means of a control unit, and a feed device for carrying out the method.
  • Weaving machines are known, in particular also rapier weaving machines, in which the feed device consists of a plurality of feed means for a weft thread each, which feed the same type of weft thread during the successive entries, which are then introduced into a shed by entry means, for example grippers.
  • the weft of the respective feed means remains connected to the side fabric edge between successive entries. Only at the beginning of the next weft insertion of the weft of the feed means in question does this weft become separated from the side fabric edge with a pair of scissors.
  • the connection point to the side fabric edge is in the area of the first warp thread. When weaving with a waste bar, this connection point is in the area of the first waste warp thread.
  • connection point In the case where weaving is carried out without a waste bar, the connection point is in the area of the side fabric edge.
  • An entry scissors which detaches a weft thread from the connection point during the start of its entry is known, for example, from US Pat. No. 3,621,885 or US Pat. No. 4,964,442.
  • the feed device additionally has means for selecting the weft thread to be inserted in each case from one of the feed means, which in the case of rapier weaving machines consists of a thread presentation device which presents the weft thread to be inserted in each case to a gripper. It is also known to equip the feed device with one or more thread monitors for detecting a broken weft thread.
  • Each of the feed means generally has two bobbins as a thread supply, the end of the bobbin in use being linked to the start of the reserve bobbin. As a rule, the feed means also contain a prewinder.
  • the invention has for its object to provide a method of the type mentioned, in which it is prevented that a weft thread with a quality defect, such as a knot or other irregularity, is woven into the fabric without the loom having to be stopped .
  • This object is achieved in that the weft threads in the area between the thread supply and the fabric are monitored for quality defects, that signals indicating quality defects are forwarded to the control unit, which evaluates these signals and which causes the means for selection to select only the one or the other select weft threads that do not have a quality defect so long for weft entries until the point of the weft thread that has the quality error and is removed from the area of the means for selection has reached a predetermined area.
  • the feed device automatically prevents a weft thread with a quality defect, for example a knot, from being woven into the fabric. Since only the selection of the weft thread having a quality error is prevented, the weaving machine can continue to work with the other feed means and the weft threads fed therefrom, so that, as a rule, the loom does not have to be stopped and restarted.
  • the weft thread with the quality defect is transported away until the point with the quality defect has reached an area which is no longer entered into the fabric the next time the weft is inserted and is therefore woven. As a rule, there is therefore no need for operator intervention to produce a fabric whose weft threads do not contain any knots or other irregularities.
  • the weft thread containing a quality error also remains connected to the fabric and is transported away from its feed means by means of the fabric until the point of the weft thread with the quality defect has been removed beyond the area of a pair of entry scissors. Then this weft thread can again be involved in the weft entries, since then the point of the weft thread with the quality defect does not get into the fabric.
  • the thread containing the quality error is picked up and transported away by means of an additional device.
  • a feed device in the area of each of the feed means between the thread supply and the fabric at least one detector monitoring the weft thread for quality defects is arranged, which is connected to the control unit which, upon receipt of a quality defect of a weft thread indicating the actuation of the means for selecting with respect to this weft thread blocks for a weft insertion until the point of the weft thread having the quality error has been transported away into a predetermined area.
  • a detector is arranged in the area of the thread supply of each guide means between two supply spools and emits a signal indicating the change from one supply spool to the other.
  • This detector is used for indirect monitoring of the weft thread for a quality defect, since it can generally be assumed that there is a thread connection between the processed supply spool and the subsequent supply spool serving as a reserve, for example a knot that represents a quality defect.
  • Such a detector which only monitors quality defects indirectly, is sufficient if the supply bobbins themselves are of high quality, in which the previous processing, in particular rewinding on a winding machine, ensured that the thread wound on this bobbin has no quality defects.
  • the feed means each contain a prewinder and that a detector monitoring the weft thread for quality defects is arranged between the thread supply and the prewinder.
  • This arrangement of detectors is recommended if it cannot be excluded that the supply spools themselves have threads with irregularities, for example knots or thick or thin places.
  • the supplied weft threads are continuously monitored, so that it can also be excluded for bobbins of this type that weft threads with quality defects are woven into the fabric.
  • the rapier weaving machine shown in FIGS. 1 to 3 has a feed device (1) for three weft threads (2, 3, 4), each of which contains its own feed means (5, 6, 7), for successive entries of the same type of weft thread into a shed (8) to be used.
  • the inserted weft thread remains connected to the fabric at a connection point (9) and is only separated at the beginning of the next entry by means of an indicated entry scissors (10) which is operated, for example, by the weaving machine drive.
  • the connection point (9) is located in the area of the first warp thread facing the feed device (1), in the exemplary embodiment shown in the area of the first warp thread (11) of a waste bar. If you are weaving without a waste bar, the connection point is in the area of the side edge of the fabric.
  • the entry scissors (10) are arranged in the area of the connection point (9) near the stop edge (12). It serves to separate the weft thread to be entered at the beginning of an entry from the connection point (9).
  • the feed device (1) also has selection means (14) with a thread presentation device (13), each of which contains presentation needles (38, 39, 40) provided with a thread eyelet.
  • the selection means (14) causes the weft thread of a particular feed means (5, 6, 7) to be presented to a gripper (15).
  • the feed device (1) contains a thread monitor (16) which detects breakage of the weft threads (2, 3, 4).
  • Each feed means (5, 6, 7) contains two supply bobbins (17A, 17B, 18A, 18B, 19A, 19B) as thread supply, the End of the weft thread of the bobbin (17A, 18A, 19A) in the operating position is tied to the start of the bobbin (17B, 18B, 19B) in the reserve position, for example by means of knots (41, 51, 52). Furthermore, each feed means (5, 6, 7) contains a prewinder (20, 21, 22). Detectors (23, 24, 25) are arranged between the supply spools and determine the change from one spool to the other. A thread guide (26, 27, 28) for guiding the weft threads is arranged in front of the pre-winding device (20, 21, 22).
  • the coils (17A, 17B, 18A, 18B, 19A, 19B) are arranged stationary on a coil block (29).
  • the pre-winding devices (20, 21, 22) are also attached to this coil block (29).
  • a guide (30) is provided, which serves to insert the weft thread to be entered in each case (the weft thread 2 in the exemplary embodiment according to FIG. 1) between the connection point (9) and the gripper (15) to stretch before this weft is cut from the entry scissors (10).
  • a guide (31) is provided in the vicinity of the connection point (9).
  • a pair of scissors (32) is also shown, which separates the waste bar (33) from the tissue (34).
  • the weft threads should be woven as firmly as possible between the warp threads (35) of the waste bar (33). If thermoplastic weft threads are woven, the scissors (32) can be designed as a melting device, which leads to the advantage that the cut weft threads are practically welded to the warp threads (35) of the waste bar (33), so that a very firm bond is created.
  • 1 also shows a reed (36). 1 shows in broken lines that the gripper is in a position (15A) in the shed (8) and enters a weft thread (2) of the feed means (5) into the shed (8).
  • the rapier weaving machine has a control unit (37) which controls the prewinding devices (20, 21, 22) and the means (14) for selection in a manner known per se, which in turn controls the thread presentation device (13) in such a way that the thread presentation needle (38 , 39, 40) are alternately advanced so that the weft thread (2, 3, 4) assigned to them reaches the area of the entraining rapier (15) and is inserted by the latter into the shed (8) for a protective entry.
  • Detectors are also connected to the control unit (37), which monitor the weft threads (2, 3, 4) for quality defects and in particular knots.
  • Such coil change detectors are known, for example, from US Pat. No. 5,137,059 (& EP-A-0 454 199).
  • These bobbin change detectors (23, 24, 25) are sufficient as (indirect) detectors for knots or irregularities in those cases in which a thread connection in the form of a knot or the like is only between the two supply bobbins. is present, but the coils themselves have no additional knots. This is usually the case with bobbins that are used for knot-free tissue.
  • known thread thickness sensors are used as detectors for monitoring the weft threads for quality defects, which have optical elements as transmitters and receivers, for example, and which emit a signal when a knot or other irregularity of the weft thread passes through this sensor.
  • These detectors can be arranged in the area of the thread guides (26, 27, 28). It is also possible to design these thread guides (26, 27, 28) as detectors in front of the prewinding devices (20, 21, 22) of the feed means (5, 6, 7). Such detectors are used when there are knots or irregularities within the weft bobbin that must be removed and must not be woven.
  • the detectors (23, 24, 25 and / or 26, 27, 28) are arranged such that the length of the weft threads between them and the connection point (9) of the fabric is greater than an insertion length of a weft thread, i.e. greater than the width of the fabric plus waste strips and protruding ends. This makes it possible to eliminate quality errors such as knots or the like. in the wefts before this weft section is inserted into the shed (8). Since there is always weft thread on the prewinder (20, 21, 22), there is a sufficient length in each case if the detectors are arranged in front of the prewinder.
  • the control unit (37) evaluates the signal indicating a quality error in a weft thread in such a way that the means (14) for selecting the weft threads for an entry are controlled such that the weft thread with the quality defect is no longer selected for the entry.
  • the bobbin (17A) has been used up, so that the weft thread (2) with a knot (41) has been pulled through the bobbin change detector (23), which has emitted a signal to the control unit (37) .
  • This signal is triggered in that the prewinder (20) has removed the weft thread (2) from the bobbin (17A) and is now pulling it off the bobbin (17B).
  • the weft threads (2, 3, 4) were selected by actuating the presentation fingers (38, 39, 40) alternately from the individual feed means (5, 6 and 7).
  • the weft thread (2) is excluded from the weft thread entry, ie the means (14) for selecting the weft thread to be inserted only selects between the weft threads (3 and 4) by means of the presentation fingers (38, 39) . Since the weft thread (2) remains connected to the fabric, even if it is no longer involved in the weft entries in the shed (8), it is still drawn off.
  • the means (14) for selecting the weft threads is switched back to normal operation, so that this weft thread (2) is again involved in the weft insertion.
  • this position of the quality error (node 41) is reached when quality errors (node 41) have been removed beyond the area of the entry scissors (10), as shown in FIG. 3.
  • the switching of the means (14) for selection to normal operation is controlled by means of a circuit (42) which receives from the control unit (37) the signal indicating a quality error (knot or irregularity) and which after a period of time after receipt this signal gives a signal for switching over the means (14) for selection.
  • the time period can be set by means of an input unit (43) of the control unit (37). The time period is determined by how long the weft thread takes to move from the bobbin (17B) to the area after the insertion scissors (10), ie the time that the side edge of the fabric or the waste bar (33) take. to take the weft with this length. This time period is a function of the weave density and the speed at which the fabric is made. Time recording must of course be interrupted if the weaving machine is stopped in between.
  • the circuit (42) counts the number of entries of the weft thread after the detection of a quality error and then correspondingly emits a signal for switching over the means (14) for selection.
  • the number of entries is also determined by the weaving density and the speed with which the fabric is produced.
  • the thread presentation needles (38, 39 and 40) of the thread presentation device (13) or the thread monitor (16) or the starting thread guide (48, 49, 50) of the pre-winding devices (20, 21, 22) can be equipped with detectors which detect the passing of a quality defect (knots or other irregularity) and report them to the control unit (37).
  • This signal is passed on to the circuit (42), which after a certain period of time or after a certain number of further entries then emits a signal to the control unit (37) that the means (14) for selection can be switched back to normal operation because the quality error has moved past the entry scissors (10).
  • a detector (53), for example an optical detector, is provided in the region of the guide (31), which gives a signal to the control unit (37) when the Place with the quality defect this passes after the entry scissors (10) arranged detector (53). This signal can then be used immediately to switch back the means (14) for selection to normal operation.
  • the waste bar (33) is pulled off by means of a pull-off device (not shown) and wound up, for example.
  • the waste bar (33) is sucked into a pneumatic suction device and conveyed to a waste container.
  • the suction device can also be used to avoid a quality defect Pull off the weft thread (in the exemplary embodiment the weft thread 2) from the supply means which are still switched on (in the exemplary embodiment the feed means 5), in particular by increasing the suction force of the suction device after this weft thread, which is initially moved along with the waste bar (33), the suction device has reached. This makes it possible to remove the weft thread which has a quality defect more quickly, so that the time in which this weft thread is not involved in the weft entries is shortened.
  • a suction device (54) is arranged in the area of the thread guide (31), which also serves to pull the weft thread, which has been found to have a quality defect, as quickly as possible from the guiding means that continue to run.
  • the suction device (54) which is designed as a suction jet pump with the aid of a pressure supply line (56) containing a switchable valve (55), is controlled by the control unit (37).
  • the valve (55) is opened so that the suction device (54) is switched on.
  • the suction device (54) initially works with a relatively high suction power, which is designed such that the weft thread containing the quality error (in the exemplary embodiment, the weft thread 2) is drawn off from the prewinding device (20).
  • a second signal is sent to the control unit (37), which then switches over the valve (55) in such a way that the suction device (54) exerts a reduced suction force.
  • This suction force is designed so that the weft thread is only held, but is not pulled further from the prewinder.
  • the means (14) for selection switched back to normal operation, so that the weft thread that had the quality error is again selected for the weft insertion.
  • the gripper (15) then takes over the weft thread (in the exemplary embodiment, the weft thread 2) guided in the guide (31) and introduces it into the shed, which is cut by the entry scissors (10). It is also readily possible to arrange a separate pair of scissors (57) controlled by the control unit (37) within the suction device (54).
  • the control unit (37) can provide that only the weft thread (4) of the feed means (7) is selected for the insertion of the weft threads, so that the weaving process can continue with the same weaving speed and with the same weaving performance.
  • the weaver can of course also remove the quality error (knot or other irregularity) when repairing the thread breaks and enter with the input unit (43) that the removal of the relevant weft thread terminated and the means (14) for selection are switched back to normal operation, so that the weft threads to be inserted are selected by all feed means (5, 6, 7).
  • the breaking of a thread break is not done by knotting the ends. Either a completely new weft thread is inserted or the two parts of the weft thread are spliced together connected. If the removal of a thread break is nevertheless carried out by means of a knot, the weaver can then, for example, press a pushbutton (44) which inputs a quality error signal into the control unit (37), so that when the weaving machine starts up, the described method for the knotted and thus a weft thread with a quality defect is carried out.
  • control unit (37) in such a way that the weft threads are monitored for quality defects only when required, i.e. if no knots or other irregularities are to be woven into the tissue.
  • This monitoring function for quality errors can be switched on or off, for example, on the input unit (43).
  • the control unit (37) can also have a registration unit, which registers and counts the number of quality errors (nodes or other irregularities) that have been removed and, if necessary, shows them on a display.
  • the invention can preferably be applied to weaving machines with three or more feed means (5, 6, 7), since it is then possible to continue weaving even if several of the feed means have a quality defect or a thread break.
  • the pre-winding devices (20, 21, 22) are provided with winding detectors (45, 46, 47) which at least approximately detect the number of windings present on the pre-winding devices (20, 21, 22). This makes it possible to set a minimum and a maximum amount of weft on the prewinder. Using the minimum amount of weft thread, the control unit (37) can assess whether one or more weft entries can still be made from the feed means (5, 6 or 7) in question, on which a quality defect has been determined, without the quality defect being woven into the fabric .
  • the control unit (37) will then emit such a signal to the means (14) for selecting that the feeder (5) concerned can take two further entries with the weft thread (2) before the means (14) for selecting it Do not select feeder (5) any further. This allows the time period to be limited in which the feed means in question (in the exemplary embodiment feed means 5) is not involved in the weft insertion.
  • the minimum amount of time during which the weft thread must remain connected to the connection point (9) can be determined by means of the maximum amount of the weft thread on the prewinder. In the illustrated embodiment, this is the time span that the relevant weft thread needs, the weft thread moving along with the fabric edge, to cover a length that is at least six turns plus the distance between the bobbin (17b) and the connection point (9) of the Corresponds to the fabric edge.
  • the invention can also be used in weaving machines in which weaving is carried out with several different types of weft thread. If, for example, two types of weft threads are woven, a feed device with three feed means is required for the first weft thread type and a feed device with three feed means is also required for the second weft thread type, the feed devices alternately feeding a weft thread to the insertion devices. If a quality defect (knot or other irregularity) is found in one of the feed means for the first weft thread type or for the second weft thread type, the weft threads are only inserted starting from the remaining feed means of this feed device.
  • a quality defect not or other irregularity

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  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Looms (AREA)

Claims (11)

  1. Procédé pour alimenter des fils de trame (2, 3, 4) et pour leur insertion dans un tissu (34), dans une machine à tisser ayant un dispositif d'alimentation (1) destiné à alimenter en alternance au moins deux fils de trame, dont chacun peut être alimenté à l'aide d'un moyen d'alimentation (5, 6, 7) qui lui est propre, chaque moyen d'alimentation contenant une réserve de fil (17A, 17B, 18A, 18B, 19A, 19B) et des moyens (14) pour sélectionner un fil de trame à insérer dans le tissu, moyens qui peuvent être manoeuvrés à l'aide d'une unité de commande (37), caractérisé en ce que les fils de trame (2, 3, 4) font, dans la zone située entre la réserve de fil et le tissu, l'objet d'une surveillance des défauts de qualité (41, 51, 52); des signaux indiquant des défauts de qualité sont transmis à l'unité de commande (37), qui évalue les signaux, et qui fait que les moyens (14) de sélection ne sélectionnent que le ou les fils de trame ne présentant pas de défauts de qualité pour les insertions de trame, jusqu'à ce que le point du fil de trame présentant le défaut de qualité, qui est évacué de la zone des moyens (14) de sélection, et arrive dans une zone prédéterminée.
  2. Procédé selon la revendication 1, caractérisé en ce que le fil de trame (2, 3, 4) contenant un défaut de qualité reste assemblé au tissu (34), et, à l'aide du tissu, est éloigné de ses moyens d'alimentation (5, 6, 7), jusqu'à ce que le point du fil de trame où se trouve le défaut de qualité soit évacué jusqu'au-delà de la zone d'un ciseau d'insertion (10).
  3. Procédé selon la revendication 1, caractérisé en ce que le fil de trame (2, 3, 4) contenant le défaut de qualité est repris et évacué à l'aide d'un dispositif additionnel (54).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que les moyens d'alimentation (5, 6, 7) contiennent chacun un appareil de prébobinage (20, 21, 22); que les fils de trame (2, 3, 4) sont, en avant de l'appareil de prébobinage, l'objet d'une surveillance de leurs défauts de qualité; et que la longueur ou la quantité du fil de trame se trouvant sur l'appareil de prébobinage est détectée, et évaluée par le dispositif de commande (37).
  5. Dispositif d'alimentation (1) pour une machine à tisser, destiné à l'alimentation alternée d'au moins deux fils de trame (2, 3, 4) à insérer dans un tissu (34), avec chacun son propre moyen d'alimentation (5, 6, 7) pour chaque fil de trame, chaque moyen contenant une réserve de fil (17A, 17B, 18A, 18B, 19A, 19B) et des moyens (14) pour sélectionner un fil de trame à insérer dans le tissu (34), moyens qui peuvent être manoeuvrés à l'aide d'une unité de commande (37), caractérisé en ce que, dans la zone de chacun des moyens d'alimentation (5, 6, 7), entre la réserve de fil et le tissu, est disposé au moins un détecteur (23, 24, 25, 26, 27, 28), qui surveille les défauts de qualité du fil de trame, et qui est raccordé à l'unité de commande (37), laquelle est pourvue d'un circuit d'évaluation, lequel, quand il reçoit un signal indiquant un défaut de qualité d'un fil de trame, bloque la manoeuvre des moyens (14) permettant de sélectionner ce fil de trame pour une insertion de trame, et ce, jusqu'à ce que le point du fil de trame présentant le défaut de qualité soit évacué dans une zone prédéterminée.
  6. Dispositif selon la revendication 5, caractérisé en ce que, dans la zone de la réserve de fil de chaque moyen d'alimentation (5, 6, 7), un détecteur (23, 24, 25), qui émet un signal indiquant le changement d'une bobine de réserve à l'autre est situé entre deux bobines de réserve (17A, 17B, 18A, 18B, 19A, 19B).
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que les moyens d'alimentation (5, 6, 7) contiennent chacun un appareil de prébobinage (20, 21, 22), et que chaque fois un détecteur (26, 27, 28), qui surveille les défauts de qualité du fil de trame (2, 3, 4), est disposé entre la réserve de fil (17A, 17B, 18A, 18B, 19A, 19B) et l'appareil de prébobinage.
  8. Dispositif selon la revendication 7, caractérisé en ce qu'à chaque appareil de prébobinage (20, 21, 22) est affecté un détecteur de spires (45, 46, 47), qui détermine le nombre des spires présentes sur l'appareil de prébobinage.
  9. Dispositif selon l'une des revendications 5 à 8, caractérisé en ce que l'unité de commande (37) contient un circuit (42), qui libère de nouveau la sélection du fil de trame (2, 3, 4) comportant un défaut de qualité, circuit qui prend en compte le laps de temps qui s'écoule après le signal indiquant un défaut de qualité, et/ou le nombre des insertions de trame après ce signal.
  10. Dispositif selon l'une des revendications 5 à 8, caractérisé en ce qu'un détecteur (53), qui détermine un défaut de qualité du fil de trame, est connecté à l'unité de commande (37), détecteur qui est disposé dans la voie de transport du fil de trame évacué.
  11. Dispositif selon l'une des revendications 5 à 10, caractérisé en ce que, pour évacuer le fil de trame (2, 3, 4) comportant un défaut de qualité, un dispositif d'aspiration (54) est prévu, qui est disposé après les moyens de sélection (14) et les moyens d'insertion du fil de trame.
EP94117970A 1993-12-01 1994-11-15 Procédé pour fournir et insérer du fil de trame dans le tissu d'un métier à tisser et fournisseur Expired - Lifetime EP0656437B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9301329A BE1007850A3 (nl) 1993-12-01 1993-12-01 Werkwijze en weefmachine met een voeding voor inslagdraden.
BE9301329 1993-12-01

Publications (2)

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EP0656437A1 EP0656437A1 (fr) 1995-06-07
EP0656437B1 true EP0656437B1 (fr) 1997-05-14

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EP94117970A Expired - Lifetime EP0656437B1 (fr) 1993-12-01 1994-11-15 Procédé pour fournir et insérer du fil de trame dans le tissu d'un métier à tisser et fournisseur

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US (1) US5544679A (fr)
EP (1) EP0656437B1 (fr)
BE (1) BE1007850A3 (fr)
DE (1) DE59402743D1 (fr)

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KR100690214B1 (ko) 1998-10-09 2007-03-12 바마크 악티엔게젤샤프트 실의 연속 처리 방법, 실의 연속 풀림 장치, 합성 다섬유 실의 직조 방법 및, 실의 직조 및 권취용 직조 기계
JP2003342857A (ja) * 2002-05-28 2003-12-03 Tsudakoma Corp 織機における緯糸処理方法
TWI302903B (en) * 2003-02-05 2008-11-11 Saurer Gmbh & Co Kg Yarn withdrawal device
US6997215B2 (en) 2003-03-24 2006-02-14 Sultex Ag Method for weaving low flaw cloths by means of the elimination of weft thread sections which have irregularities
EP1462551A1 (fr) * 2003-03-24 2004-09-29 Sultex AG Procédé pour tisser des tissus avec peu de défauts par élimination des parties de fil de trame défectueuses
BE1015818A3 (nl) * 2003-12-15 2005-09-06 Dirk Benoit Elektronika N V Detectiesysteem voor het detecteren en vermijden van knopen en/of onregelmatigheden bij inslagdraden in een weefsel.
DE202004003308U1 (de) * 2004-03-01 2005-07-14 Wangner Gmbh & Co. Kg Vorrichtung zur Minimierung von Maschinenstillstandszeiten infolge von Spulenwechsels an Webmaschinen
BE1016639A6 (nl) * 2005-06-15 2007-03-06 Picanol Nv Werkwijze voor het inbrengen van inslagdraden.
JP2008019515A (ja) * 2006-07-11 2008-01-31 Tsudakoma Corp 流体噴射式織機の緯入装置
DE102007042348A1 (de) * 2007-09-06 2009-03-12 Lindauer Dornier Gmbh Verfahren und Vorrichtung zum Eliminieren von Schußfäden mit Fadenunregelmäßigkeiten aus Geweben
EP2163669B1 (fr) * 2008-09-12 2011-11-23 Karl Mayer Textilmaschinenfabrik GmbH Ourdissoir à chaîne de motif et râtelier rotatif pour un ourdissoir à chaîne de motif
EP2175058B1 (fr) * 2008-10-10 2011-08-03 Gebrüder Loepfe AG Métier à tisser doté d'un capteur de qualité de fil
US9487887B1 (en) * 2013-03-13 2016-11-08 Jonathan Grossman Systems and methods for manufacturing textiles

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Also Published As

Publication number Publication date
DE59402743D1 (de) 1997-06-19
EP0656437A1 (fr) 1995-06-07
BE1007850A3 (nl) 1995-11-07
US5544679A (en) 1996-08-13

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