EP0310804B1 - Dispositif pour éloigner un fil de trame cassé pour un métier à tisser à jet d'air - Google Patents

Dispositif pour éloigner un fil de trame cassé pour un métier à tisser à jet d'air Download PDF

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Publication number
EP0310804B1
EP0310804B1 EP88113844A EP88113844A EP0310804B1 EP 0310804 B1 EP0310804 B1 EP 0310804B1 EP 88113844 A EP88113844 A EP 88113844A EP 88113844 A EP88113844 A EP 88113844A EP 0310804 B1 EP0310804 B1 EP 0310804B1
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EP
European Patent Office
Prior art keywords
weft thread
air jet
thread
weft
main air
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.)
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EP88113844A
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German (de)
English (en)
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EP0310804A2 (fr
EP0310804A3 (fr
Inventor
Dirk Lewyllie
José Vangheluwe
Bernard Dr.Ing. Pauwels
Henry Shaw
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Picanol NV
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Picanol NV
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Publication of EP0310804A3 publication Critical patent/EP0310804A3/fr
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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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/3086—Weft removal
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3006—Construction of the nozzles
    • D03D47/3013—Main nozzles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/308—Stretching or holding the weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft

Definitions

  • the invention relates to a method for removing an incorrectly inserted weft thread on an air-jet weaving machine, in which the individual weft threads are inserted into a compartment formed by warp threads by means of a main blowing nozzle and auxiliary blowing nozzles, are then attached to the edge of the goods and during the striking phase of the area the weft thread held ready to be separated, the insertion of the weft threads being monitored by a weft guard arranged on the side opposite the main blowing nozzle, if the weft thread is not detected, the removal of the incorrectly inserted weft thread is prevented and a program for troubleshooting is triggered in which the machine is stopped and is brought into a position exposing the incorrectly inserted weft thread, after which a predetermined length of the weft thread provided is inserted into the compartment and entered with the incorrectly Agenic weft thread is transported to the side opposite the main blowing nozzle, after which the entered part of the weft thread is separated from the ready-made
  • the invention has for its object to provide a method of the type mentioned, in which it is possible to detach an incorrectly entered weft with relatively high forces from the edge of the goods and in which these relatively high forces applied substantially over the entire length of the compartment can be.
  • weft thread provided is released in succession in a plurality of length sections, each of which is smaller than twice the length of the weft thread, and that these length sections together with the faulty one registered weft threads are shot through the compartment in several pulses by means of the main blowing nozzle and the auxiliary blowing nozzles.
  • a predetermined length of the weft thread held ready is released and is held taut in the area between the main blowing nozzle which moves with a sley and the fabric edge. This ensures that the weft thread held ready is not torn off from the incorrectly entered weft thread when the sley is moved back, since a thread length is provided for this movement. Nevertheless, this thread length is prevented from reaching the area of the already newly formed compartment, so that a malfunction could then occur.
  • the main blowing nozzle is pressurized with compressed air for a period of time, the duration of which is adapted to the released length section of the weft thread held ready. This ensures that the main blowing nozzle does not exert excessive stress on the weft thread, which could lead to a possible destruction of the weft thread.
  • auxiliary blowing nozzles are acted upon in succession with a time sequence in groups with compressed air, the time sequence being adapted to the speed of movement of the newly introduced length section. It can be assumed that, as a rule, the detachment of the incorrectly entered weft thread from the edge of the goods takes more time than usually the insertion of a weft thread, so that the time sequences will generally run more slowly.
  • auxiliary blowing nozzles are acted upon once or more times to generate impulse-like thread movements with compressed air. This pulls several times jerkily on the incorrectly entered weft thread, without a further thread length being released during this pulling and being inserted into the compartment.
  • a pneumatic catching device arranged on the side facing away from the main blowing nozzle is switched on and off in a pulsed manner. This pneumatic catching device supports the jerky pulling off of the incorrectly entered weft thread.
  • the sley is moved forward in the area of the goods edge, so that the weft thread is in a cutting device located on the side of the main blowing nozzle is inserted and cut off. This movement can save an additional cutting device since the cutting device available for normal operation is then used.
  • auxiliary blowing nozzles are acted upon by compressed air in one or more cycles. This step then serves to finally blow out the cut, newly inserted weft thread and the faulty weft thread. It is expedient if the pneumatic catching device is switched on and off when the auxiliary blowing nozzles are applied to remove the cut weft thread. The thread catching device thus also helps with the jerky pulling off and detaching of the weft thread.
  • Air weaving machines have been known for a long time, i.e. both through the literature and through machines on the market, so that a basic representation of the air-jet machine is sufficient. Only those parts are described and explained in a special way that have a special representation compared to a conventional air-jet weaving machine.
  • the warp threads run from a warp beam (not shown) via a match beam and separating bars to a shedding device (11).
  • the shedding device (11) forms weaving shed with the warp threads, into which weft threads are inserted one after the other.
  • the weft threads are struck against the fabric edge (15) by a reed (9), which is arranged on a sley (8).
  • the finished goods are drawn off by a schematically illustrated take-off device (12) and wound onto a goods tree (13).
  • the weft threads are introduced into the respective compartments by means of air.
  • the weft threads are presented by means of a bobbin (1), from which they are drawn off by means of a prewinder (2) and kept ready in windings.
  • a weft thread length ie approximately the fabric width, corresponds to a plurality of windings of the prewinder (2), ie three windings or four windings or the like.
  • the pre-winding device (2) is assigned a magnetic clamping device (3) with which the weft thread held ready can be clamped or released on the pre-winding device (2).
  • the pre-winder (2) is followed by a stationary pre-blowing nozzle (4), which will be explained in more detail later with reference to FIG. 4.
  • the pre-blowing nozzle (4) is connected in a manner not shown to a compressed air source via solenoid valves, the control of which will be explained later.
  • the pre-blowing nozzle (4) is followed by a main blowing nozzle (5) which is arranged on the loading beam (6) of the sley (8).
  • the sley (8) is driven to oscillate movements about an axis (7) running transversely to the weaving machine.
  • the blades of the reed (9) are provided with a U-shaped channel into which the air flow of the main blowing nozzle (5) is directed from the side.
  • a plurality of auxiliary blowing nozzles (10) are arranged on the loading beam (6) of the sley (8) and are directed into the U-shaped channel of the leaves of the reed (9) with a component in the transport direction of the weft.
  • a thread monitor (19) which monitors the registered weft thread.
  • the clamping device (3) is opened for a predetermined time, the period of time being such that a predetermined number of turns of the weft is withdrawn from the prewinder (2), which corresponds to the weft length to be inserted.
  • the insertion of the weft takes place while the sley (8) is moving forward, ie while the reed (9) is moving in the direction of the fabric edge (15). At the end of this movement, the newly inserted weft thread is struck by the reed (9) against the edge of the goods (15), the weft thread coming into the area of a pair of scissors (14), which then transfers the inserted weft thread from that in the area of the main blowing nozzle (5). separates the weft located.
  • the scissors (14) consists of a fixed scissor knife and one of an electric motor (16) movable scissor knife driven to reciprocate motion. It should also be noted that the auxiliary blowing nozzles (10) are supplied with compressed air in groups in the transport direction of the weft thread, the sequence with which the switching is carried out in groups being adapted to the speed of the weft thread.
  • the pre-blowing nozzle (4) shown in Fig. 4 has a through-channel (25) in the form of a tube, which is arranged in a housing block (26).
  • the housing block (26) is provided with two annular chambers (27 and 28), each of which is connected to a compressed air supply (not shown) via solenoid valves.
  • the annular chamber (28) is connected to the compressed air supply by means of two connections (29 and 30) via separate solenoid valves.
  • the annular chamber (28) can thus be acted upon with the full blowing pressure on the one hand and, on the other hand, with a pressure which is significantly reduced compared to the full blowing pressure and which should only be sufficient for tensioning the weft thread.
  • the tube (25) opens into an injector nozzle (31) which is connected to the annular chamber (28). Via this injector nozzle (31), a suction air flow is generated in the tube (25), with which the weft thread is sucked in and then blown out of a tube attachment (32).
  • the annular chamber (27) is connected to a compressed air connection (33) via a solenoid valve, not shown, with the compressed air source, not shown.
  • the tube (25) is provided with bores (34) which are inclined at an angle to the normal transport direction of the weft thread, through which holes an air stream can be blown into the tube (25) against the normal transport direction of the weft threads.
  • the blowing pressure is adjustable by means of a valve, not shown.
  • the inlet area of the tube (25) facing the prewinding device (2) is equipped with an optical thread monitor (35) provided, which is connected via a connecting line (36) to a control device, not shown.
  • a pneumatic catching device (18) is arranged on the side of the weaving machine opposite the main blowing nozzle (5) and is directed towards the area of the weaving shed with a slot-shaped opening (24).
  • the slot-shaped opening (24) extends in the direction of movement of the reed (9), it being at the level of the U-shaped channel of the reed leaves. From Fig. 2 it can also be seen that the slot-shaped opening is approximately aligned with the circular path of movement of the U-shaped channel of the reed reed (9) reed reed (9). As can be seen from FIGS. 2 and 3, the slot-shaped opening (24) extends approximately over half of the possible movement of the reed (9) starting from its rear dead center position.
  • a channel adjoins the slot-shaped opening (24) and tapers towards a discharge line (23).
  • Blow nozzles (90 and 21) open into this channel and are connected to a compressed air source via solenoid valves (not shown).
  • a further thread monitor (17) is arranged in the area of the end of the slit-shaped opening (24) facing the goods edge (15), the meaning of which will be explained later.
  • the blowing nozzle (20) has the function of bringing the thread located in the area of the catching device (18) into the vicinity of the thread monitor (17) and also confusing the thread end.
  • the blowing nozzle (21), which is essentially directed away from the opening (24), has the task of exerting a tensile force on the thread located in its area.
  • the functions when a weft error occurs will now be explained below.
  • the individual functions like the drives of the entire weaving machine, are controlled by a control unit which contains a microprocessor, via which the individual elements and drives are given beforehand and also adjustable times can be controlled, the control can be set with regard to the times and also changed with regard to the frequency.
  • the central control unit receives a corresponding signal.
  • the process steps listed below are then triggered by this signal and are controlled by a microprocessor.
  • the electric motor (16) of the scissors (14) is controlled so that no cutting takes place, i.e. that the incorrectly entered weft remains in connection with the weft held ready.
  • the clamping device (3) of the prewinding device (2) is actuated in such a way that a winding is pulled off the weft thread that is ready. This removal takes place in that the pre-blowing nozzle (4) and the main blowing nozzle (5) are subjected to a reduced air pressure in the normal blowing direction.
  • the reduced compressed air supply to the pre-blowing nozzle (4) and the main blowing nozzle (5) is completely interrupted, while the annular chamber (27) of the pre-blowing nozzle (4) is pressurized with compressed air, so that the weft end between the incorrectly entered weft thread and the main blowing nozzle (5 ) is excited.
  • the size of the pressure and / or the blowing time can be adjusted via a valve.
  • a thread loop is formed between the pre-blowing nozzle (4) and the pre-winder (2).
  • the error signal emitted by the weft monitor (19) also triggers a shutdown of the air-jet weaving machine.
  • the air-jet machine cannot be stopped so quickly that the incorrectly entered weft thread would not be struck against the edge of the goods.
  • the machine is therefore stopped in a predetermined position of, for example, 120 °.
  • the faulty weft thread is then uncovered by forming the compartment made available for its insertion. This can be done by turning the machine back in a corresponding manner.
  • the machine is equipped with a special control that controls the machine in a weft search position, which is often provided in particular when the individual units of the air-jet machine are driven by individual motors.
  • the sley (8) with the auxiliary blowing nozzles (10) is moved back so far that the auxiliary blowing nozzles (10) just dip into the compartment with their blowing openings. This prevents the defective weft thread from being caught on the auxiliary blowing nozzles when the defective weft thread is removed, which will be described below.
  • This is a position that deviates somewhat from the normal weft position, since dynamic conditions have to be taken into account in the normal insertion of weft threads.
  • the position for removing the weft error corresponds to approximately 60 °, while the normal position for inserting the weft thread is 80 °.
  • the preparations are completed before the subsequent removal of the incorrectly entered weft thread.
  • a functional test of the machine is carried out, in particular to determine whether the signal of the weft monitor, which determined that no weft has arrived on the side facing away from the main blowing nozzle (5), possibly for a cause other than one incorrect insertion of the weft is due.
  • it is checked here whether a weft thread is available in the area of the pre-blowing nozzle (4), since if a weft thread is missing, the cause of the error in the area of the weft thread preparation is to be found at this point.
  • the presence of a ready-made weft thread in the area of the pre-blowing nozzle (4) is checked via the thread monitor (35).
  • the program for removing the incorrectly entered weft thread from the compartment is started from.
  • at least one further turn of the weft thread is released by means of the clamping device (3), which is then shot into the compartment by switching on the pre-blowing nozzle and the main blowing nozzle.
  • the counter air of the pre-blowing nozzle (4) is switched off beforehand, while for the main blowing nozzle (5) the blowing stage with the lower power was switched on in the normal blowing direction.
  • the pre-blowing nozzle and the main blowing nozzle are operated at full power, ie with the compressed air of the operational size, but with a blowing time which is reduced compared to the normal operating conditions.
  • the blowing time is adapted to the provided length of the weft to be blown. Since one turn was already thrown from the prewinder (2) during the preparatory steps for removing the weft error, there are now at least two turns of the ready weft in addition to the incorrectly entered weft in the compartment after the insertion.
  • the auxiliary blowing nozzles (10) are also switched on in their usual staff-like order, ie they are pressurized in groups in succession in the firing direction with compressed air. Since it is to be expected that the Z-shaped thread structure between the goods edge and the newly blown weft thread will not be transported through the compartment as quickly as a conventional weft thread, it is provided that the timing of the activation of the successive groups of auxiliary blowing nozzles (10) is opposite the normal time sequence is reduced.
  • Both the blowing time of the pre-blowing nozzle (4) and the main blowing nozzle (5) and the time sequence for switching on the auxiliary blowing nozzles can be adjusted so that an adaptation to the material being processed is possible.
  • a predetermined weft thread length is injected, by means of which the incorrectly entered weft thread, which is still in the area of the edge of the goods, is jerkily pulled.
  • the auxiliary blowing nozzles (10) are acted upon once again in groups in one or more further cycles with compressed air, so that the auxiliary blowing nozzles (10) attack the formed Z-shaped thread in a pulsed or jerky manner.
  • the sequence of the successive loading of the groups of auxiliary blowing nozzles can take place as in the first step or, if necessary, be slowed down somewhat.
  • the number of these pulling attempts of the incorrectly entered weft thread, which are only caused by the auxiliary blowing nozzles, is adjustable and can also be adapted to the material to be processed. If a material is processed in which an incorrectly entered weft thread detaches relatively easily from the edge of the goods, this step of the method can possibly be completely dispensed with.
  • At least one further turn is released from the pre-winding device (2) by actuating the clamping device (3). So much weft thread length is released that the newly inserted weft thread with the incorrectly inserted weft thread has a sufficient length to even reach the area of the pneumatic catching device (18) which is arranged on the fabric side facing away from the main blowing nozzle (5). Since its thread monitor (17), whose function will be explained, is arranged at a greater distance than the weft monitor (19), one more turn must be detached from the prewinder (2) than corresponds to the normal weft length.
  • the newly inserted weft thread has already completely loosened the incorrectly inserted weft thread, so that it has already been taken up in the pneumatic catching device (18).
  • the incorrectly entered weft thread is still held on the fabric edge (15), so that a further, jerky pulling by actuating the auxiliary blowing nozzles (10) is necessary.
  • This also depends on the material to be woven and is appropriate this material adjustable. It should also be noted here that the total thread length required by the weft thread held ready can be released in one or more steps, ie several turns at once or only one turn in succession.
  • the thread catching device (18) As soon as the weft thread reaches the thread catching device (18), it is swirled and confused by the nozzle (20). By applying compressed air via the nozzle (21), the thread catching device (18) is also activated in a pulsed manner, so that the thread catching device (18) also contributes to jerky pulling on the incorrectly entered weft thread. It is provided that the thread catching device (18) is switched on and off together with the last group of auxiliary blowing nozzles (10). After the end of the pulse-like or shot-like loading cycles, however, the pneumatic safety device (18) remains activated, while the auxiliary blowing nozzles (10) are switched off again.
  • the air-jet weaving machine is moved forward into a certain position, ie into a position near the stop position, ie, for example into a position of 20 °.
  • the weft thread still connected to the main blowing nozzle (5) is inserted into the scissors (14), which is then actuated so that the thread is cut off.
  • the reed (9) brings the thread into a control position, ie into the area of the thread monitor (17) at the end of the slot-like opening (24) of the catching device (18) facing the goods edge (15).
  • the thread monitor (17) is used to check whether a weft thread has even reached the thread catching device. If this is not the case, either the attempt to remove it is repeated or the air-jet machine is blocked.
  • the machine After cutting, the machine is moved back so that the auxiliary blowing nozzles (10) are immersed in the compartment again, i.e. up to about 60 °. Then the auxiliary blowing nozzles (10) are pressurized cyclically and in stages with compressed air in order to finally remove the newly inserted weft thread together with the faulty weft thread.
  • the pneumatic safety device (18) is again switched synchronously with the last group of auxiliary blowing nozzles. It has been shown that the auxiliary blowing nozzles (10) and the catching device (18) are generally sufficient for four cycles of pressurized air.
  • the air-jet machine is once again brought forward into a control position, i.e. in a position in which the reed (9) would bring any weft thread still present in the compartment back into the area of the thread monitor (17). If the thread monitor (17) detects no weft thread, the air-jet weaving machine is brought back into its starting position, in which the weaving process is resumed. If the thread monitor (17) detects the presence of a weft thread during this check, then either the attempts to loosen the incorrectly entered weft thread by actuating the auxiliary blowing nozzles (10) and the safety device (18) are repeated or the machine is switched to malfunction, so that an operator is called for troubleshooting.

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  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (20)

  1. Procédé pour enlever une fausse duite dans une machine à tisser pneumatique, dans laquelle les fils de trame individuels sont insérés, à l'aide d'une tuyère principale (5) et deux tuyères auxiliaires (10), dans une foule formée des fils de chaîne, puis sont serrés sur le bord de l'article et, pendant la phase du serrage, sont séparés des fils de trame tenus prêts dans la zone de la tuyère principale, l'insertion des fils de trame étant surveillée par un casse-trame (19) ; si aucun fil de trame n'est détecté, la séparation de la fausse duite est interrompue, et il y a déclenchement d'un programme d'élimination des fausses duites, dans lequel la machine est arrêtée et est mise dans une position qui dégage la fausse duite, ce après quoi une longueur prédéfinie du fil de trame tenu prêt est insérée dans la foule et, avec la fausse duite, est transportée vers le côté opposé à la tuyère principale (5), ce après quoi la partie insérée du fil de trame est séparée du fil de trame tenu prêt et, avec la fausse duite, est évacuée sur le côté opposé à la tuyère principale, caractérisé en ce que le fil de trame tenu prêt est dégagé successivement en plusieurs tronçons, dont chacun est inférieur au double de la longueur du fil de trame, et que ces tronçons sont duités à travers la foule en plusieurs impulsions, en même temps que la fausse duite, à l'aide de la tuyère principale (5) et des tuyères auxiliaires (10).
  2. Procédé selon la revendication 1, caractérisé en ce que, avant déclenchement de l'élimination de la fausse duite, on vérifie si un nouveau fil de trame est tenu prêt dans la zone de la tuyère principale.
  3. Procédé selon les revendications 1 ou 2, caractérisé en ce que, après que le casse-trame a émis un signal indiquant une fausse duite, une longueur prédéfinie du fil de trame tenu prêt est dégagée et est maintenue serrée entre la tuyère principale et la lisière.
  4. Procédé selon les revendications 1 ou 2, caractérisé en ce que, après que le casse-trame a émis un signal indiquant une fausse duite, une longueur prédéfinie du fil de trame tenu prêt est dégagée, et est maintenue serrée dans une zone située entre la tuyère principale, qui se déplace en même temps qu'un battant, et la lisière.
  5. Procédé selon les revendications 3 ou 4, caractérisé en ce que, pour serrer la longueur de fil entre la tuyère principale et la lisière, une tuyère auxiliaire, montée en amont de la tuyère principale, est commutée pour que le jet d'air soit envoyé dans le sens opposé à la direction normale du jet d'air, la pression du jet d'air étant de préférence ajustable.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que, pendant le duitage en impulsions, la tuyère principale reçoit de l'air comprimé pendant un laps de temps dont la durée est rapportée au tronçon dégagé du fil de trame tenu prêt.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que les tuyères auxiliaires reçoivent de l'air comprimé dans la direction de la trame, les unes après les autres par groupes selon une séquence temporelle, cette dernière étant adaptée à la vitesse de déplacement du tronçon qui vient d'être inséré.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que, après insertion d'un tronçon prédéfini dans la foule, les tuyères auxiliaires reçoivent une ou plusieurs fois de l'air comprimé, pour produire des déplacements du fil par impulsions.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce qu'un dispositif de saisie pneumatique, disposé sur le côté opposé à la tuyère principale, est mis en service et mis hors service par impulsions.
  10. Procédé selon la revendication 9, caractérisé en ce que le dispositif de saisie est, pendant le duitage par impulsions, mis en service d'une manière synchronisé avec le dernier groupe des tuyères auxiliaires.
  11. Procédé selon l'une des revendications 1 à 10, caractérisé en ce que, après le duitage par impulsions, le battant est déplacé vers l'avant, dans la zone de la lisière, de sorte que le fil de trame est inséré dans un mécanisme de coupage se trouvant sur le côté de la tuyère principale, et est coupé.
  12. Procédé selon l'une des revendications 1 à 11, caractérisé en ce que, après la coupe, les tuyères principales reçoivent de l'air comprimé en un ou plusieurs cycles.
  13. Procédé selon la revendication 12, caractérisé en ce que, pour éliminer la fausse duite qui vient d'être coupée, le dispositif de saisie pneumatique est mis hors circuit et mis en circuit par application d'air comprimé aux tuyères auxiliaires.
  14. Procédé selon l'une des revendications 1 à 13, caractérisé en ce que le succès de l'enlèvement d'une fausse duite est contrôlé avant que l'autorisation ait été donnée de remettre en marche la machine à tisser pneumatique.
  15. Procédé selon la revendication 14, caractérisé en ce que, pour contrôler le succès de l'enlèvement de la duite, le peigne est, avec la duite, mis dans une position de contrôle dans laquelle le fil de trame prend par rapport à un casse-trame une position parfaitement définie.
  16. Procédé selon la revendication 14 ou 15, caractérisé en ce que, au plus tard après la coupe, on contrôle la présence d'un fil dans le dispositif de saisie de fil, à l'aide d'un casse-trame se trouvant dans le dispositif de saisie et disposé contre l'extrémité, dirigée vers la lisière, d'un orifice d'entrée en forme de fente.
  17. Procédé selon les revendications 14 ou 15, caractérisé en ce que, après la coupe et l'insufflation d'air, on vérifie s'il y a un fil de trame dans la foule, un signal indiquant un fil bloquant alors le redémarrage de la machine à tisser pneumatique.
  18. Procédé selon les revendications 14 ou 15, caractérisé en ce que, avant la coupe du fil de trame qui vient d'être inséré, on vérifie si un fil de trame est arrivé jusqu'au côté opposé à la tuyère principale, et que, si aucun fil de trame n'est détecté, il y a répétition du duitage par impulsions, ou encore blocage de la remise en service de la machine à tisser.
  19. Procédé selon la revendication 15, caractérisé en ce que le fil est, à l'aide d'une tuyère, poussé jusqu'à la position de contrôle.
  20. Machine à tisser pneumatique, possédant un dispositif pour enlever une fausse duite, comportant une tuyère principale (5) et des tuyères auxiliaires (10) destinées à insérer les différents fils de trame dans une foule formée par des fils de chaîne ; des moyens (9) destinés à assurer ensuite un serrage sur la lisière, et des moyens (14) destinés, pendant la phase du serrage, à assurer une séparation d'avec les fils de trame tenus prêts dans la zone de la tuyère principale ; un cassetrame (19), qui surveille l'insertion des fils de trame et est disposé sur le côté opposé à la tuyère principale, casse-trame grâce auquel, si aucun fil de trame n'est détecté, il y a interruption de la séparation de la fausse duite et déclenchement d'un programme d'élimination de la fausse duite, programme par lequel la machine s'arrête et est mise dans une position qui dégage la fausse duite, ce après quoi une longueur prédéfinie du fil de trame tenu prêt est insérée dans la foule et est, avec la fausse duite, transportée jusqu'au côté opposé à la tuyère principale (5), ce après quoi la partie insérée du fil de trame est séparée du fil de trame tenu prêt et, avec la fausse duite, est évacuée sur le côté opposé à la tuyère principale, caractérisée en ce qu'on prévoit des moyens (2, 3, 4) destinés à dégager le fil de trame tenu prêt, sous forme de plusieurs tronçons longitudinaux, qui chacun sont plus courts que le double de la longueur du fil de trame, et que l'on prévoit des moyens pour manoeuvrer par impulsions la tuyère principale (5) et les tuyères auxiliaires (10), qui, à l'aide de la tuyère principale et des tuyères auxiliaires, duitent par plusieurs impulsions, à travers la foule, ces tronçons longitudinaux en même temps que les fausses duites.
EP88113844A 1987-09-11 1988-08-25 Dispositif pour éloigner un fil de trame cassé pour un métier à tisser à jet d'air Expired - Lifetime EP0310804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873730480 DE3730480A1 (de) 1987-09-11 1987-09-11 Verfahren zum entfernen eines fehlerhaft eingebrachten schussfadens an einer luftwebmaschine
DE3730480 1987-09-11

Publications (3)

Publication Number Publication Date
EP0310804A2 EP0310804A2 (fr) 1989-04-12
EP0310804A3 EP0310804A3 (fr) 1991-09-18
EP0310804B1 true EP0310804B1 (fr) 1993-11-24

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ID=6335751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113844A Expired - Lifetime EP0310804B1 (fr) 1987-09-11 1988-08-25 Dispositif pour éloigner un fil de trame cassé pour un métier à tisser à jet d'air

Country Status (3)

Country Link
US (1) US4898214A (fr)
EP (1) EP0310804B1 (fr)
DE (2) DE3730480A1 (fr)

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DE102021207297B3 (de) 2021-07-09 2022-03-17 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren zum Entfernen eines fehlerhaft eingetragenen Schussfadens sowie Luftdüsenwebmaschine

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CH682244A5 (en) * 1990-07-12 1993-08-13 Sulzer Ag Multicolour airjet loom - has logic circuit with weft detector to arrange length of weft on the barrel of the accumulator w.r.t. type of weft
EP0561218A1 (fr) * 1992-03-16 1993-09-22 Lindauer Dornier Gesellschaft M.B.H Procédé et dispositif pour la présentation d'une réserve de fil de trame fixée en cas d'arrêt de tissage
DE4209686C2 (de) * 1992-03-25 1995-02-02 Dornier Gmbh Lindauer Verfahren und Vorrichtung zur Herstellung von insbesondere knotenfreien Gewebe auf Luftdüsenwebmaschinen
BE1008058A3 (nl) * 1994-02-02 1996-01-03 Picanol Nv Inrichting voor het klemmen van een inslagdraad.
DE19521106A1 (de) * 1995-06-09 1996-12-12 Dornier Gmbh Lindauer Verfahren zur Schußstoppbehebung
DE19521100C1 (de) 1995-06-09 1996-07-11 Dornier Gmbh Lindauer Kontrollierte Absaugung an Webmaschinen
DE29721042U1 (de) * 1997-11-28 1998-02-05 Dornier Gmbh Lindauer Webmaschine, insbesondere Luftdüsenwebmaschine
JP3157776B2 (ja) * 1998-04-17 2001-04-16 津田駒工業株式会社 織機の起動方法
DE10261774A1 (de) * 2002-12-20 2004-07-01 Picanol N.V. Vorrichtung und Verfahren zum Strecken
WO2007057217A1 (fr) * 2005-11-21 2007-05-24 Picanol N.V. Procede permettant d’introduire un fil de trame dans une machine a tisser a jet d’air et machine a tisser a jet d’air
BE1018036A3 (nl) * 2008-03-06 2010-04-06 Picanol Nv Werkwijze en weefmachine met een inrichting voor het vermijden van een inweven.
BE1019614A3 (nl) 2009-07-01 2012-09-04 Picanol Inrichting en werkwijze voor het vangen en strekken van inslagdraden bij weefmachines.
FR2981091B1 (fr) * 2011-10-06 2013-12-20 Michelin Soc Tech Dispositif et procede d'extraction de trames dans une nappe de renfort destinee a la fabrication d'un pneumatique
BE1021879B1 (nl) 2014-05-22 2016-01-25 Picanol Strekinrichting voor een inslagdraad
JP6028773B2 (ja) * 2014-09-09 2016-11-16 株式会社豊田自動織機 エアジェット織機における緯糸処理方法
CN106592069B (zh) * 2016-12-30 2018-07-06 吴江市兴业纺织有限公司 一种喷气织机
JP7077968B2 (ja) * 2019-01-14 2022-05-31 株式会社豊田自動織機 エアジェット織機の緯糸処理装置

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NL7610385A (nl) * 1976-09-17 1978-03-21 Rueti Te Strake Bv Pneumatische weefmachine, alsmede daarvoor bestemde inslagtransporteur.
US4781221A (en) * 1985-06-29 1988-11-01 Nissan Motor Co., Ltd. Mispicked weft yarn removing method and system therefor
EP0216220B1 (fr) * 1985-09-04 1992-04-15 Tsudakoma Corporation Procédé et dispositif pour le réajustage automatique du dispositif de stockage de fil de trame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021207297B3 (de) 2021-07-09 2022-03-17 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Verfahren zum Entfernen eines fehlerhaft eingetragenen Schussfadens sowie Luftdüsenwebmaschine
WO2023280510A1 (fr) 2021-07-09 2023-01-12 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Procédé de retrait d'un fil de trame incorrectement inséré, et métier à tisser à jet d'air

Also Published As

Publication number Publication date
DE3730480A1 (de) 1989-03-30
EP0310804A2 (fr) 1989-04-12
DE3885847D1 (de) 1994-01-05
US4898214A (en) 1990-02-06
EP0310804A3 (fr) 1991-09-18

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