EP0567428A1 - Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé - Google Patents

Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé Download PDF

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Publication number
EP0567428A1
EP0567428A1 EP93810211A EP93810211A EP0567428A1 EP 0567428 A1 EP0567428 A1 EP 0567428A1 EP 93810211 A EP93810211 A EP 93810211A EP 93810211 A EP93810211 A EP 93810211A EP 0567428 A1 EP0567428 A1 EP 0567428A1
Authority
EP
European Patent Office
Prior art keywords
weaving
fabric
shed
warp
weft
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
EP93810211A
Other languages
German (de)
English (en)
Other versions
EP0567428B1 (fr
Inventor
Klaus Berktold
Kurt Günther
Anton Egloff
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.)
Itema Switzerland Ltd
Original Assignee
Sulzer AG
Sultex 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, Sultex AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Priority to EP93810211A priority Critical patent/EP0567428B1/fr
Publication of EP0567428A1 publication Critical patent/EP0567428A1/fr
Application granted granted Critical
Publication of EP0567428B1 publication Critical patent/EP0567428B1/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
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/002—Avoiding starting marks
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
    • D03D51/005—Independent drive motors

Definitions

  • the invention relates to a method for starting a weaving machine after a standstill phase, in particular after an interruption of the weaving process in order to remedy an error in the formation of the fabric, which weaving machine has a warp let-off device, a goods take-off device, a shedding device and a weaving drawer for attaching a weft thread which is respectively inserted into a shed contains the fabric edge of the fabric, in a first starting phase the fabric edge being held in an alternative position distant from a stop position of the sley, a weft feed is blocked in the shed and the weaving machine is driven idle and the edge of the fabric is then returned against the stop position of the sley, and in a second starting phase the weft thread is entered into the shed.
  • the invention further relates to a weaving machine for carrying out the method.
  • the goods edge is held in a forward avoidance position at a distance from the stop position of the sley until a certain lifting force is reached (JP Patent Publication 2-169749) Rule reached in the second weaving cycle, so that in the known embodiment the weft insertion can take place after the first weaving cycle which is carried out in idle mode.
  • a certain lifting force is reached
  • the measures known hitherto in particular in the case of looms with a high speed and correspondingly high weft insertion rate, cannot reliably prevent the formation of such an increase.
  • the invention has for its object to provide a method, particularly improved in this respect, for starting a weaving machine, in particular for restarting after a malfunction has been remedied, by which the formation of contact points in the fabric is reliably avoided even in weaving machines with a high weft insertion rate.
  • the control of the shedding device and at least one of the warp let-off and fabric take-off devices according to the invention permits a targeted influencing of the parameters which are decisive for a uniform fabric image, in particular a restoration of the tension of the warp threads existing before the weaving process is interrupted, until the weaving machine returns to its original, the normal weaving operation has reached the corresponding speed and its corresponding dynamic operating state resulting from the interaction of the individual units.
  • the shedding device and the aggregates interacting therewith can be operated at any time, i.e. after each of the idle weaving cycles, switchable to the operational weaving program to initiate the second starting phase of the method according to the invention.
  • the weaving machine according to the invention for carrying out the method is the subject of claim 5.
  • the warp beam 1 contains a warp beam 1, a tensioning beam 2, a shedding device 3 and a sley 4, as well as a breast beam 5, a take-off roller 6, a pressure roller 7 and a load beam 8.
  • the warp beam 1 is equipped with a warp let-off device 10 according to the Arrows 11 and Ila coupled to be driven.
  • the goods take-off roller 6 is coupled to be driven by a goods take-off device 12 in accordance with the arrows 13 and 13a.
  • Warp threads 14 are guided from the warp beam 1 through the shedding device 3 against a fabric edge 15 and from there as part of a fabric 16 formed there against the fabric tree 8 onto which the fabric 16 is wound.
  • the shedding device 3 contains a number of heald frames 17, only two of which are shown in the drawing, and a drive device 18, by means of which the heald frames 17 can each be adjusted to form a shed 20.
  • a weft insertion device coupled to the main drive of the loom by a weft insertion means, e.g. Compressed air or, as indicated in the drawing, e.g. band-shaped gripper element 21, a weft thread 22 is inserted, which in a stop position 4 'of the sley 4, which can be pivoted via a drive device 23, is attached to the goods edge 15 and integrated by a subsequent change of subject.
  • a weft insertion means e.g. Compressed air or, as indicated in the drawing, e.g. band-shaped gripper element 21, a weft thread 22 is inserted, which in a stop position 4 'of the sley 4, which can be pivoted via a drive device 23, is attached to the goods edge 15 and integrated by a subsequent change of subject.
  • the drives of the warp let-off device 10 and the goods take-off device 12 as well as the drive device 18 of the shedding device 3 can each be controlled by a common control device 24 in accordance with a weaving program.
  • the drive device 23 of the sley 4 can be coupled to the main drive of the weaving machine or, as shown, can also be controlled by itself via the control device 24.
  • the control device 24 is in a known manner via signal lines 27, 28, 30; 31, 32 can be influenced by control signals from numerous monitoring devices, by means of which e.g. the tension of the warp threads 14 and the weft threads 22 as well as the condition of the fabric 16 formed is detected.
  • a sensor 25 for monitoring the position of the goods edge 15 and a device 26 for detecting an error e.g.
  • the sensor 25 and the device 26 are connected to the control device 24 via the signal lines 27 and 28, respectively.
  • the drives of the individual units of the weaving machine are coordinated with one another via the control device 24 and are controlled in accordance with the predetermined weaving program during normal weaving operation.
  • the weaving machine is stopped by a corresponding control signal of the monitoring element in question and, if necessary, for example to remove an incorrectly inserted weft thread, by resetting the corresponding units - the warp let-off device 10, the goods take-off device 12 and the shedding device 3 - Returned to an operating position intended for the program continuation of the interrupted weaving process.
  • the goods edge 15 is moved from the position shown in full lines to one of the stop position 4 ′ of the sley 4 by stepwise driving the warp beam 1 and the goods take-off roller 6 according to the arrows 11 and 13 respectively removed, dash-dotted alternative position 15 'adjusted and held in this during part of a first starting phase.
  • the one with at least one unit of the weaving machine e.g.
  • the weaving machine when the weft feed to the weft insertion means 21 is blocked - is used for a number, e.g. two to twenty or more, idle weaving cycles until it has reached its original speed corresponding to normal weaving operation, the original tension of the warp threads 14 is restored and all of their aggregates work together in the appropriate, original rhythm.
  • the shedding device 3 is controlled via the control device 24 independently of the weaving program provided in the operational manner in such a way that the heald frames 17 assume a position in each of the idle weaving cycles that corresponds to an open position of the shed 20 in which the last correctly inserted weft thread 22 is securely bound by the warp threads 14 on the fabric edge 15 in the avoidance position 15 '.
  • the heald frames 17, as shown in FIG. 2 can be kept in the same open shed position over all weaving cycles of the first starting phase or, as shown in FIGS. 3 and 4, according to their own, from the operational weaving program different start program can be controlled.
  • At least one of the monitoring devices of the weaving machine e.g. the device 26 assigned to the fabric 16 or a guard element, not shown, which detects the tension of the warp threads 14, initiates a reverse rotation of the warp beam 1 and / or the goods take-off roller 6 in the direction of the arrows Ila or 13a via the control device 24 and the goods edge 15 against the Stop position 4 'of the sley 4 returned.
  • the monitoring devices of the weaving machine e.g. the device 26 assigned to the fabric 16 or a guard element, not shown, which detects the tension of the warp threads 14 initiates a reverse rotation of the warp beam 1 and / or the goods take-off roller 6 in the direction of the arrows Ila or 13a via the control device 24 and the goods edge 15 against the Stop position 4 'of the sley 4 returned.
  • the shedding device 3, the warp let-off device 10 and the take-off device 12 are again activated in accordance with the operationally predetermined weaving program in the sense of a continuation of the interrupted weaving process, the weft thread 22 being transferred to the weft insertion means 21 into the weaving shed 20 formed according to the weaving program , is struck on the goods edge 15 and is integrated by a program-specific following change of subject. Since this weft insertion takes place with the same warp thread tension and under the same dynamic operating conditions as that before the interruption of the Weft insertion carried out during the weaving process, the formation of a visible contact point in the fabric can be avoided in most cases.
  • the goods edge 15 moved back from the avoidance position 15 'at the end of the first starting phase I can be guided into a compensating position 15a or 15b indicated in FIG are held in this position, which is offset by an adjustable dimension - an undersize in position 15a or a corresponding excess in position 15b - relative to a desired position corresponding to the stop position 4 'of the sley 4.
  • This degree of dislocation corresponds to a defined fraction, e.g. 20 to 60% of the warp and fabric feed determined by the weaving program after each weft insertion and is in each case, e.g. can be influenced in accordance with the properties of the warp and / or weft material to be processed, via the warp let-off device 10 and / or the goods take-off device 12 or by appropriate activation of the tensioning arm 2 and / or the breast arm 5.
  • the goods edge 15 is removed from the compensating position 15a or 15b in a predetermined number, e.g. one to ten or more, the same sub-steps each before one of the following weft entries into an appropriate intermediate position and finally into the target position.
  • the operationally constant weft density of the fabric 16, which is determined by the set warp and fabric feed, can be varied within the predetermined limits and thus prevent the occurrence of a fabric defect which occurs in particular within a selectable fabric section limited by the number of partial steps , if, at constant weft density, the wrap angle of the warp threads wrapping around the weft threads deviate from a target value which is established in normal weaving operation.
  • different wrap angles of the warp threads wrapping around the weft threads can thus be compensated and gradually adjusted to the operational target value of this wrap angle.
  • the formation of a visible contact point in the tissue 16 can also be prevented and an essentially uniform tissue image can be achieved.
  • the direction and the degree of the required displacement of the compensation position 15a or 15b relative to the stop position 4 'of the sley 4 can e.g. when weaving the weaving machine covered with the corresponding warp and weft material, determined by starting operations of the weaving machine carried out on a trial basis and adjusted according to the result that can be achieved in the process.
  • the described correction of the position of the goods at the edge of the goods can be carried out automatically in each case by actuating the tensioning tree 2 and / or the breast tree 5.
  • a separate control unit 24a can be provided in the control device 24, which can be activated during the first starting phase and can be switched off before the start of the second starting phase.
  • a corresponding control unit 24a can also be designed as an installation part, which can optionally be installed in an existing control device, for example for retrofitting an existing weaving machine.
  • another shedding device e.g. a jacquard device may be provided.
  • the shed diagram according to FIG. 2 shows a shed 20a with a weft 22a entered in a weaving cycle Wa before the interruption of the weaving process, a shed 20b formed in accordance with the predetermined weaving program for the next weft insertion with a weft 22b entered in a weaving cycle Wb, and a subsequent one according to the program Shed 20c with a weft 22c entered in a weaving cycle Wc.
  • the shed 20b is held in the open position over a plurality of, as shown, five weaving cycles W1 to W5 of the first starting phase 1, as well as in the weaving cycle Wb of the second starting phase, in which the weft thread 22b is entered according to the program.
  • the first start phase can extend over a number, as shown four idle weaving cycles W1 to W4, the weaving shed 20b described above being formed in weaving cycles W1, W3 and Wb, while in weaving cycles W2 and W4 a different shed 20x is formed, which does not appear in the operational weaving program, so that the weft thread 22a is securely bound.
  • the shed 20b can be held in the corresponding open position over several, as shown three, idle weaving cycles W1, W2 and W3 and combined with the shed 20x formed in the idle weaving cycle W4.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP93810211A 1992-04-22 1993-03-24 Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé Expired - Lifetime EP0567428B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93810211A EP0567428B1 (fr) 1992-04-22 1993-03-24 Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP92810293 1992-04-22
EP92810293 1992-04-22
EP93810211A EP0567428B1 (fr) 1992-04-22 1993-03-24 Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé

Publications (2)

Publication Number Publication Date
EP0567428A1 true EP0567428A1 (fr) 1993-10-27
EP0567428B1 EP0567428B1 (fr) 1997-08-20

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EP93810211A Expired - Lifetime EP0567428B1 (fr) 1992-04-22 1993-03-24 Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629725A1 (fr) * 1993-06-15 1994-12-21 Sulzer RàœTi Ag Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé
DE4438762C1 (de) * 1994-10-29 1995-09-28 Dornier Gmbh Lindauer Verfahren zur Vermeidung von Gewebefehlern in Glatt- und Polgeweben
EP0950740A1 (fr) * 1998-03-21 1999-10-20 Günne Webmaschinenfabrik GmbH & Co. KG Procédé pour éviter des défauts de tissage et métier à tisse pour la mise en oeuvre de ce procédé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119121A1 (fr) * 1983-03-09 1984-09-19 Societe Alsacienne De Construction De Materiel Textile Procédé et dispositif pour supprimer sur les tissus, les défauts consécutifs à l'arrêt de la machine à tisser
DE3642913A1 (de) * 1986-12-16 1988-08-04 Kaiser Gmbh & Co Kg Verfahren zur steuerung einer webmaschine und webmaschine zur durchfuehrung des verfahrens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0119121A1 (fr) * 1983-03-09 1984-09-19 Societe Alsacienne De Construction De Materiel Textile Procédé et dispositif pour supprimer sur les tissus, les défauts consécutifs à l'arrêt de la machine à tisser
DE3642913A1 (de) * 1986-12-16 1988-08-04 Kaiser Gmbh & Co Kg Verfahren zur steuerung einer webmaschine und webmaschine zur durchfuehrung des verfahrens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 435 (C-0760)18. September 1990 & JP-A-02 169 749 ( TSUDAKOMA ) 29. Juni 1990 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0629725A1 (fr) * 1993-06-15 1994-12-21 Sulzer RàœTi Ag Procédé pour démarrer un métier à tisser et métier à tisser pour effectuer ce procédé
DE4438762C1 (de) * 1994-10-29 1995-09-28 Dornier Gmbh Lindauer Verfahren zur Vermeidung von Gewebefehlern in Glatt- und Polgeweben
EP0715010A1 (fr) 1994-10-29 1996-06-05 Lindauer Dornier Gesellschaft M.B.H Méthode pour éviter les fautes de tissage sur les tissus unis et à poils
US5590692A (en) * 1994-10-29 1997-01-07 Lindauer Dornier Gesellschaft Mbh Method for avoiding fabric faults during transitional loom operating conditions
EP0950740A1 (fr) * 1998-03-21 1999-10-20 Günne Webmaschinenfabrik GmbH & Co. KG Procédé pour éviter des défauts de tissage et métier à tisse pour la mise en oeuvre de ce procédé

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Publication number Publication date
EP0567428B1 (fr) 1997-08-20

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