EP0344104A1 - Métier à tisser avec système de réglage de l'insertion de la trame - Google Patents

Métier à tisser avec système de réglage de l'insertion de la trame Download PDF

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Publication number
EP0344104A1
EP0344104A1 EP89810353A EP89810353A EP0344104A1 EP 0344104 A1 EP0344104 A1 EP 0344104A1 EP 89810353 A EP89810353 A EP 89810353A EP 89810353 A EP89810353 A EP 89810353A EP 0344104 A1 EP0344104 A1 EP 0344104A1
Authority
EP
European Patent Office
Prior art keywords
weft
speed
thread
yarn
weft insertion
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.)
Granted
Application number
EP89810353A
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German (de)
English (en)
Other versions
EP0344104B1 (fr
Inventor
Theodor Wuest
Godert De Jager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0344104A1 publication Critical patent/EP0344104A1/fr
Application granted granted Critical
Publication of EP0344104B1 publication Critical patent/EP0344104B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • 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
    • 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
    • D03D47/36—Measuring and cutting the weft

Definitions

  • the invention relates to a method for operating a weaving machine with a weft insertion system by means of a flowing medium, for example air, and with a weft insertion control system with which the weft thread speed can be measured and, depending on the measured speed, components of the weft insertion system which influence the weft thread speed are controlled can.
  • a flowing medium for example air
  • EP-0 164 773 a method for controlling an air jet loom is presented, the current position of the weft end being monitored during the entry and the actuation time of the nozzles being regulated according to the current position.
  • suitable means are required for determining the current position of the thread end, which presumably must be arranged distributed over the entry path of the weft thread. This can only be achieved with a considerable expenditure of suitable measuring devices. More precise information is missing in the script.
  • a weft yarn speed measuring device Repetitively measures the weft thread speed during the weft insertion and forwards the measured values to a control unit, where these measured values are compared with predetermined target values and, if necessary, changes in the settings of the components of the weft insertion system are initiated in order to adapt the course of the weft thread speed over time to the predetermined course.
  • the weft yarn speed measuring device can also continuously register the weft yarn speed and transmit the registered speed values to the control unit, in which the speed values of the weft yarn are processed in a computing unit, as a result of which the average speed of the weft yarn is known at all times and correction values based on this average speed in comparison with the target speed are generated for the setting of the components in the control unit and are transmitted to these components with the aim that the weft insertion is finished at a predetermined point in time within a weaving cycle, the setting of the components having to be changed continuously.
  • the weaving machine for carrying out the method has in the area of the yarn feed system a weft yarn speed measuring device which continuously registers the weft yarn speed, which is connected to a control device for the weft insertion via at least one signal line and is connected by means of control lines to the components influencing the weft insertion speed, one in the control device the processing unit which processes the registered speed values of the weft yarn and which can continuously output control values to the components via the control unit.
  • a storage unit can also be accommodated in the control device, which stores the course of the desired value of the weft thread speed over time Contains part.
  • the setpoint profile of the weft thread speed can be inserted into the weaving machine using an electronic data carrier and can be changed depending on the weft yarn to be woven.
  • the components for influencing the weft thread speed can be, for example, a main blowing nozzle before entering the shed or the auxiliary blowing nozzles, wherein, for example, the weft brake or a drive motor of a weft yarn store can also be involved in regulating the weft yarn speed.
  • the main nozzle can be influenced, for example, in that a setting change to a higher pressure is carried out on a pressure reducing valve attached between the control device and the main nozzle if the weft thread is inserted too slowly.
  • the main nozzle of the weaving machine remains switched on for a weft insertion only for a fraction of the time period, as a result of which the weft thread speed drops towards the end of the weft insertion before the weft thread is finally braked abruptly at the end of the insertion.
  • Care is taken to ensure that a critical yarn speed v K is not exceeded when the weft thread is braked, the tension values in the weft thread remaining within a permissible range as a result of braking.
  • the speed of the weaving machine can be increased if the arrival time of the weft thread on the other side of the shed can be determined more precisely, since practically no time reserve for a weft thread that may arrive too late during a weaving cycle has to be planned in the entire movement sequence.
  • the weft thread 20 is deposited from a yarn package 20 'to the yarn feed system 2 via a yarn metering device 21, which runs continuously, via a feed tube 22 and a feed nozzle 22' on a weft yarn store 23 'in a loop shape.
  • the yarn can be fed from the disk of the weft yarn store 23 'via an eyelet 24 past a thread brake 25 to a weft insertion system 3 consisting of a main nozzle 16 and auxiliary nozzles 15.
  • a weft yarn speed measuring device 31 which continuously measures the weft yarn speed, is located between the eyelet 24 and the thread brake 25.
  • the weft 20 is entered into the weaving machine parallel to a reed 13, which is mounted together with auxiliary nozzles 15 on a sley 14.
  • the frame 11, a fabric tree 12 and a machine control 33 of the weaving machine 1 are shown, which can be accommodated separately from a control device 32 for the weft insertion.
  • the control unit 32 is connected to other components of the weft insertion control system via control lines 326, 326 ′ and 325 and via a signal line 312.
  • a thread sensor 34 on the catching side of the weaving machine can also be connected to the control device 32, which contains at least one probe and determines whether the weft thread has arrived and whether the desired weft thread length is in the shed.
  • the weft thread is cut off by scissors 35 on the entry side and struck on the fabric edge (not shown) by means of the reed 13.
  • the weft tip 20 ' is kept stretched by a flow field of air from auxiliary nozzles 15.
  • the compressed air required for weaving is generated in a compressed air system 17 and fed via a pressure line 17 to the sley 14, which is designed as an air distribution pipe and on the one hand the main nozzle 16 via a pressure reducing valve 16 ', in the middle area the auxiliary nozzles 15 and on the other hand the suction channel 18 with compressed air provided.
  • the control device 32 for the weft insertion can be divided into a computing unit 32 'and a storage unit 32''. Information about the respective yarn speed during the weft insertion comes into the control device 32.
  • the yarn speed can be determined in the weft yarn speed measuring device 31, for example by means of two sensors 31 'and 31 ⁇ , which the surface structure of the past Scan the running weft thread, the comparison of the surface structures continuously determining the time difference between the passage of a certain batch of yarn at the sensors and thus also the yarn speed.
  • the computing unit 32 ' the information from the weft yarn speed measuring device 31 is processed, for example, by integrating the transmitted speed values over time and thus the total weft yarn length entered at any time is known.
  • the speed curve over time or the path of the weft yarn, as is desired for the weft insertion for a specific type of yarn, can be entered in the storage unit 32 Gar.
  • correction values can be generated for the setting of, for example, the main nozzle 16 or the auxiliary nozzles 15, which then via the control lines 325, 326, 326 'to the individual components of the weft insertion system 3 be transmitted. If, for example, it is determined that the weft yarn speed is too low, the pressure reducing valve 16 'can be adjusted so that more air and higher pressure get into the main nozzle 16 and the weft yarn 20 is accelerated.
  • the control unit 33 can be programmed in its memory unit to the entry characteristics desired for the weft yarn to be woven, the speed values of the weft yarn during the entry being predetermined on a data carrier.
  • Fig. 2 shows yet another weft yarn storage system 2 ', wherein instead of the weft yarn store 23' with plate 23 '' 'according to FIG. 1, a weft yarn store with drum 20' 'is used.
  • the drive motor 27, which causes the winding of the weft yarn 20 on the drum 27 '', can also be controlled from the control unit 32 in the sense that the total length of the weft yarn turns supplied by the winder 27 'corresponds to the total length of the weft yarn to be entered in the weaving machine.
  • the control device 32 In order to avoid a jerky delay of the yarn run before the completion of the weft entry, it may be expedient to cause a lowering of the operating pressure by the control device 32, for example in the pressure reducing valve 16 ', which causes the force transmitted from the main nozzle 16 to the weft thread 20 gradually decreases and a delay in the weft insertion occurs.
  • the thread brake 25 can also be gradually brought into the braking position, the control unit 32 determining the braking deceleration in accordance with the measured speed values.
  • the drive motor 26 for the weft yarn store 23 ' can be controlled by the control unit 32 for the weft insertion so that a small remaining supply of weft yarn remains on the plate 23''' after completion of the weft insertion.
  • This has the advantage that no weft yarn has to be supplied directly into the main nozzle 16 via the yarn metering device 21 during the weft insertion, the weft insertion speed being at a lower level compared to a system in which the insertion speed at the end of the weft insertion by the yarn metering device 21 is determined.
  • the function of the weft insertion control system 30 is described below with the aid of FIG. 3, in which the speed of the weft thread v (t) to be inserted and the entered length of the weft thread l (t) are each plotted over time.
  • the ideal course of the weft speed v (t) is shown with the solid line, as is the corresponding weft length l (t).
  • the speed v (t) decreases after the time period t E gradually until the end of the period t S when the thread brake 25 is actuated. After they have been actuated, only a little yarn can be fed into the weaving machine 1, which is why the drop in speed is very steep until the time t W has elapsed.
  • the weft thread 20 has the speed v S , which is less than the critical speed v K.
  • This speed v K is understood to mean the speed which is still permissible without causing impermissibly high thread tensions as a result of the jerk when braking.
  • 1 is either arranged between the weft yarn store 23 and the main nozzle 16, or it can be integrated in the weft yarn store 23 '' according to FIG. 2.
  • a yarn metering device 21 for the weaving machine 1 is not absolutely necessary if a weft yarn store 23 '' with an integrated thread brake 25 is used. In this case, depending on the point in time at which the thread brake 25 is actuated, the total thread length 1 entered may also vary depending on the other operating conditions.
  • Fig. 3 speed profiles and path profiles v '(t), v''(t) and l' (t), l '' (t) are also shown.
  • the speed curve v ' is above the Velocity curve v corresponding to a higher operating pressure of the medium in the main nozzle 16.
  • the blowing time t ' E of the main nozzle 16 is chosen to be somewhat longer here, and the stopping time t' S almost reaches the value t W at which the weft thread insertion should be completed, thus still there is a sufficient time interval before the last time the weft thread 20 is monitored by the thread sensor 34.
  • the control device 32 would generate a shutdown pulse for the weaving machine 1, since a thread arriving too late at the suction channel 18 can no longer be processed correctly.
  • the weft with the speed profile v ' has just the critical speed v K at time t' S when the thread brake 25 is actuated. Up to a standstill, more thread runs into the weaving machine 1, the required thread length B being exceeded in the path l 'of the weft thread.
  • blowing time t ′ E and stopping time t ′ S are thus reflected in the speed profile v ′ (t), this being registered by the weft yarn speed meter 31 according to the invention.
  • the setting parameters are automatically changed by the control unit for the weft insertion 32, the operating pressure of the main nozzle 16 being reduced so that the critical speed v K when the thread brake 25 is no longer activated is achieved.
  • the blowing time t E and the stop time t S are reduced so that the weft insertion is completed during the time t W.
  • the thread sensor 34 checks whether a sufficient thread length has been entered into the weaving machine 1 when the setting parameters are changed.
  • FIG. 3 Another speed curve v '' and the corresponding path curve l '' of the weft thread 20 can also be seen in Fig. 3, wherein the operating pressure of the main nozzle 16 is set too low and the stop time t '' S takes too long.
  • the thread sensor 34 would determine that the total weft length l '' entered did not reach the required value B or not until the time t ' W , as a result of which the control device 32 would automatically stop the weaving machine.
  • a change in the operating parameters would be made by evaluating the speed profile v '', so that when the weaving machine 1 is restarted, the speed profile of the weft thread would be closer to the ideal profile v (t).
  • the speed of the weft thread does not have to be recorded during the entire entry; it is sufficient to record some representative values of the weft speed v ′ or v ′ ′ in order to determine the deviation from the desired profile v and to generate 32 setting changes in the control unit.
  • the weft thread speed v at the end of the weft insertion is reduced to such an extent that when the thread brake 25 is actuated the thread speed v is no longer too great and the weft thread is therefore braked gently without large tension peaks becomes.
  • the lowering of the speed of the weft is mainly due to the Friction when pulling off the weft store 23 'or 23''reached after switching off the main nozzle 16.
  • the control method can also run in such a way that not all parameters are changed at the same time, but for example only the operating pressure of the main nozzle 16 or of the auxiliary nozzles 15 during a certain number of weaving cycles in order to achieve a timely end of the weft insertion at the time t W , the speed profile of the weft thread is not taken into account in detail, that is to say also the speed v S at the time the thread brake 25 is actuated.
  • the times t E and t S and possibly the operating pressure of the nozzles 15, 16 can then be changed during a second control section, so that the critical yarn speed v K when braking the weft thread 20 is sufficiently far below.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19890810353 1988-05-26 1989-05-12 Métier à tisser avec système de réglage de l'insertion de la trame Expired - Lifetime EP0344104B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH198788 1988-05-26
CH1987/88 1988-05-26

Publications (2)

Publication Number Publication Date
EP0344104A1 true EP0344104A1 (fr) 1989-11-29
EP0344104B1 EP0344104B1 (fr) 1993-07-28

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Family Applications (1)

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EP19890810353 Expired - Lifetime EP0344104B1 (fr) 1988-05-26 1989-05-12 Métier à tisser avec système de réglage de l'insertion de la trame

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EP (1) EP0344104B1 (fr)
DE (1) DE58905019D1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445687A1 (fr) * 1990-03-05 1991-09-11 Tsudakoma Kogyo Kabushiki Kaisha Procédé et dispositif de contrôle pour insérer une seule trame dans un métier à tisser à jet
EP0458753A1 (fr) * 1990-05-24 1991-11-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif de contrôle de l'introduction de la trame pour métiers À  tisser à air
EP0494050A1 (fr) * 1990-12-29 1992-07-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif pour le contrôle de pression d'air d'insertion dans un métier à tisser à jet
EP0707101A3 (fr) * 1994-10-04 1997-10-08 Antonio Bortolamai Dispositif d'insertion de la trame dans la foule d'un métier à jet d'air
EP1288359A1 (fr) * 2001-09-03 2003-03-05 Sulzer Textil Ag Métier à tisser à jet d'air et son alimentation en air comprimé
US6796338B2 (en) 2001-09-03 2004-09-28 Sulzer Textil Ag Air jet weaving machine and compressed air supply for same
EP1953282A1 (fr) * 2007-02-02 2008-08-06 Sultex AG Procédé et dispositif destinés à l'introduction d'un fil de trame pour une machine à tisser
EP2050847A1 (fr) 2007-10-19 2009-04-22 Siemens Aktiengesellschaft Procédé de transport d'un fil de trame par une foule d'une machine à tisser
EP2098624A1 (fr) * 2008-03-07 2009-09-09 Gebrüder Loepfe AG Surveillance de fils de trame dans un métier à tisser
US8150543B2 (en) 2007-09-28 2012-04-03 Siemens Aktiengesellschaft Methods, apparatus and articles for an air jet loom
CN103422233A (zh) * 2012-05-16 2013-12-04 苏州御能动力科技有限公司 一种定长储纬器控制系统及采用该控制系统的控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105561A1 (fr) * 1982-09-30 1984-04-18 Rüti-Te Strake B.V. Procédé pour le transport d'un fil de trame à travers la foule au moyen d'un fluide, ainsi qu'un métier à tisser équipé pour appliquer ce procédé
EP0164773A1 (fr) * 1984-05-16 1985-12-18 Picanol N.V. Commande réglable du fil de trame dans un métier à tisser
EP0189919A1 (fr) * 1985-01-30 1986-08-06 Vilminore Officine Meccaniche S.P.A. Dispositif pour le contrôle automatique de l'insertion de trame dans les métiers à jet d'air
EP0279222A1 (fr) * 1987-01-26 1988-08-24 Vilminore Officine Meccaniche S.P.A. Dispositif pour le contrôle automatique de l'insertion de trame dans les métiers à tisser à jet d'air

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105561A1 (fr) * 1982-09-30 1984-04-18 Rüti-Te Strake B.V. Procédé pour le transport d'un fil de trame à travers la foule au moyen d'un fluide, ainsi qu'un métier à tisser équipé pour appliquer ce procédé
EP0164773A1 (fr) * 1984-05-16 1985-12-18 Picanol N.V. Commande réglable du fil de trame dans un métier à tisser
US4673004A (en) * 1984-05-16 1987-06-16 N.V. Weefautomaten Picanol Adjustable control of the weft on a weaving loom
EP0189919A1 (fr) * 1985-01-30 1986-08-06 Vilminore Officine Meccaniche S.P.A. Dispositif pour le contrôle automatique de l'insertion de trame dans les métiers à jet d'air
EP0279222A1 (fr) * 1987-01-26 1988-08-24 Vilminore Officine Meccaniche S.P.A. Dispositif pour le contrôle automatique de l'insertion de trame dans les métiers à tisser à jet d'air

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445687A1 (fr) * 1990-03-05 1991-09-11 Tsudakoma Kogyo Kabushiki Kaisha Procédé et dispositif de contrôle pour insérer une seule trame dans un métier à tisser à jet
US5161582A (en) * 1990-03-05 1992-11-10 Tsudakoma Kogyo Kabushiki Kaisha One pick weft inserting method and control system for jet loom start-up
EP0458753A1 (fr) * 1990-05-24 1991-11-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif de contrôle de l'introduction de la trame pour métiers À  tisser à air
EP0494050A1 (fr) * 1990-12-29 1992-07-08 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Dispositif pour le contrôle de pression d'air d'insertion dans un métier à tisser à jet
EP0707101A3 (fr) * 1994-10-04 1997-10-08 Antonio Bortolamai Dispositif d'insertion de la trame dans la foule d'un métier à jet d'air
US6796338B2 (en) 2001-09-03 2004-09-28 Sulzer Textil Ag Air jet weaving machine and compressed air supply for same
EP1288359A1 (fr) * 2001-09-03 2003-03-05 Sulzer Textil Ag Métier à tisser à jet d'air et son alimentation en air comprimé
EP1953282A1 (fr) * 2007-02-02 2008-08-06 Sultex AG Procédé et dispositif destinés à l'introduction d'un fil de trame pour une machine à tisser
US8150543B2 (en) 2007-09-28 2012-04-03 Siemens Aktiengesellschaft Methods, apparatus and articles for an air jet loom
EP2050847A1 (fr) 2007-10-19 2009-04-22 Siemens Aktiengesellschaft Procédé de transport d'un fil de trame par une foule d'une machine à tisser
US7654290B2 (en) 2007-10-19 2010-02-02 Siemens Aktiengesellschaft Method for transporting a weft thread through the shed of a weaving machine
EP2098624A1 (fr) * 2008-03-07 2009-09-09 Gebrüder Loepfe AG Surveillance de fils de trame dans un métier à tisser
CN103422233A (zh) * 2012-05-16 2013-12-04 苏州御能动力科技有限公司 一种定长储纬器控制系统及采用该控制系统的控制方法
CN103422233B (zh) * 2012-05-16 2015-01-28 苏州御能动力科技有限公司 一种定长储纬器控制系统及采用该控制系统的控制方法

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Publication number Publication date
DE58905019D1 (de) 1993-09-02
EP0344104B1 (fr) 1993-07-28

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