EP0335833B1 - Procédé et installation pour étirer un tissu en largeur - Google Patents

Procédé et installation pour étirer un tissu en largeur Download PDF

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Publication number
EP0335833B1
EP0335833B1 EP19890810211 EP89810211A EP0335833B1 EP 0335833 B1 EP0335833 B1 EP 0335833B1 EP 19890810211 EP19890810211 EP 19890810211 EP 89810211 A EP89810211 A EP 89810211A EP 0335833 B1 EP0335833 B1 EP 0335833B1
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EP
European Patent Office
Prior art keywords
stenter frame
fabric
web
fabric web
drive
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.)
Revoked
Application number
EP19890810211
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German (de)
English (en)
Other versions
EP0335833A1 (fr
Inventor
Werner Duss
Hans Weber
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.)
Benninger AG Maschinenfabrik
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Benninger AG Maschinenfabrik
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Application filed by Benninger AG Maschinenfabrik filed Critical Benninger AG Maschinenfabrik
Publication of EP0335833A1 publication Critical patent/EP0335833A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B7/00—Mercerising, e.g. lustring by mercerising
    • D06B7/08—Mercerising, e.g. lustring by mercerising of fabrics of indefinite length
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/34—Driving arrangements of machines or apparatus
    • D06B3/345—Means for controlling the tension in the textile material

Definitions

  • the invention relates to a method for spreading a fabric web in a mercerizing machine according to the preamble of claim 1 and an apparatus for performing this method.
  • One method for controlling the passage of a web is e.g. known from the applicant's CH-PS-531 969.
  • the instantaneous length of the fabric web between successive treatment stations or between the beginning and end of a group of treatment stations is measured in each case and deviations in this web length from a desired value are corrected by regulating tension regulating members between the stations concerned or in the group concerned.
  • the speed of the web in the impregnation zone is compared with the speed of the web in the stabilization zone.
  • continuous goods management is provided, i.e. the material web is supported practically without interruption, and passed from one roller to the next with no free space in between.
  • the transfer of the material web takes place practically in the area of the contact line of the two rollers.
  • the purpose of such a guidance is that the web of material or web of fabric that is spread out through the machine cannot possibly collapse in width during the treatment.
  • the invention is concerned with a method or with a mercerizing machine for carrying out the method, in which the fabric web is first guided in a tied manner and then fed to a stenter. It has shown, that in general in the case of mercerization processes and the various pretreatments, such as desizing, boiling and bleaching etc., the fabric web is warped in the longitudinal direction during transport through the system, which results in a corresponding increase in width, which is further increased by the mercerization process. This can be reduced by the bound web guide or by stretching in conventional tenter frames, but not entirely avoided. This also applies to the method according to EP-A-0 198 793 or CH-PS-531 969, since the speeds of the drives can only deviate from one another to a relatively small extent due to the continuous web guidance.
  • the invention has for its object to provide an improved method and an apparatus for performing the method, in which the fabric web can be brought to the required width and length by the mercerizing process in the stenter, in order to then be stabilized and fixed.
  • a stretching of the fabric web is to be achieved which is carried out evenly and gently and does not lead to center-edge differences in the number of warp threads, as is often the case with chain mercerizing machines.
  • this object is achieved primarily by a method according to the characterizing part of claim 1 or by a device according to the characterizing part of claim 4.
  • the invention turns away from the existing expert opinion that the web of goods must be supported practically continuously.
  • the invention even deliberately accepts the fact that there is a widening of the width due to the free, unbound fabric guidance.
  • the lower pull-off speed of the fabric web in the area of the tenter frame enables a much better spreading effect of the tenter frame itself.
  • one width section and one section can be placed on the fabric web before the first treatment stage in an initial section Longitudinal dimension to be marked. The change in width and length during the course of the process can then be checked in order to optimize the speed difference, if necessary in individual steps.
  • the invention can be implemented particularly simply if the tenter frame drive is controlled with a first speed setpoint and if the drives of the treatment stations in front of the tenter frame are controlled with a second speed setpoint and are regulated in each case by a fabric tension controller at a drive speed that keeps the fabric tension constant.
  • each individual treatment station or each group of treatment stations is controlled in a manner known per se by the adjustable second speed setpoint, which can be superimposed by the fabric tension control. Every change in the fabric tension leads to an adaptation of the drive speed, which in concrete terms can mean that nip rollers lying one behind the other have slightly different drive speeds with increasing stretch of the fabric web.
  • the first speed setpoint for the tenter frame drive to reduce the fabric tension in the area of the tenter frame inlet can be set smaller than the second speed setpoint before the inlet of the tenter frame.
  • the desired fabric tension in spite of the reduced conveying speed can be achieved particularly advantageously if the fabric web is guided away from the tenter frame in bound fabric guidance, if the fabric tension is determined in the area of the tenter frame outlet and if the conveying speed of the fabric in the tenter frame is dependent on the first speed setpoint and the determined one Tissue tension is regulated. Due to the reducible conveying speed of the stenter, the fabric web can shorten what a gentle spreading accommodates. In order to maintain the width of the web after it has been spread, a stretch with a bonded fabric guide connects directly to the stenter. The removal from the stenter takes place with a predeterminable fabric tension, the speed of the stenter being corrected accordingly if the tension falls below or exceeds.
  • the regulation of the speed difference between the tensioning frame and the stretch of bound goods guidance can be carried out particularly precisely if a pull roller is provided at the end of the roller arrangement for the bound goods guidance and if the fabric web runs freely through the free stretch between the pulling roller and the entry into the tensioning frame.
  • the take-off speed of the pulling roller and stenter inlet thus determine the speed difference to be set.
  • the slower the tenter frame is driven compared to the conveying speed of the draw roller the more the length and width of the fabric web can shrink in the area of the free path, which affects the stretching behavior, especially the spreading behavior of the fabric web in the tenter frame.
  • the drive motors of the rollers of the treatment stations before and after the stenter can be controlled on the one hand by control loops to keep the tension in the fabric web constant and on the other hand by at least one device for delivering a first and a second setpoint.
  • the first or the second setpoint determines the basic speed of the entire system before the stenter and after the stenter, the speed after the stenter usually being lower than the speed before the stenter.
  • the control loops for the individual treatment stations also ensure that the tension in the tissue web is kept constant.
  • the setting of the deviating relative speeds before and after the stenter can be realized particularly advantageously if the device for delivering a first speed setpoint is connected directly to the control loops of the stenter or the drive motors connected to the stenter and to a multiplication device, and if the output of the Multiplying device the second setpoint output and is applied to the control loops of the drive motors upstream of the stenter.
  • the ratio of the two setpoints to one another and thus the speed difference at the stenter inlet can be adjusted by simply adjusting the multiplication device.
  • the multiplication device can be e.g. Calibrate as a percentage of the deviation in speed or the length of the conveyed goods. The percentage of the deviation can be displayed on corresponding preselection and display devices.
  • FIG. 1 shows a mercerizing machine 1 which is known per se in terms of structure, in which a fabric web 2 in a bound web guide passes successively through a hot impregnation zone 3, a cooling zone 4, an action zone 5 and a stabilization zone 6, the mercerized and stabilized fabric web 2 subsequently not in one more washing machine shown is washed and neutralized.
  • the stabilization zone 6 consists of two sections, namely the spreader zone 7, formed by the tenter frame 8 and a subsequent roller zone 9. In the roller zone 9, the fabric web 2 is also guided in a bonded manner. In the stabilization zone 6, the fabric web 2 is sprayed in a known manner by means of spray tubes 10 with hot weak lye in countercurrent, leached and stabilized.
  • the fabric web 2 is brought into the desired width by means of a tensioning frame 8 and, in such a spread out manner, is transferred to the roller zone 9.
  • the clamping frame 8 is a needle clamping frame. In principle, however, other types of stenter frames or spreader devices are also conceivable.
  • the tensioning frame 8 therefore has the task of bringing the fabric web 2 to the desired width and to ensure the stabilization of this width by the leaching.
  • the desired length of the fabric web 2 is only taken into account as a result of the change in width.
  • the change in width and length of the fabric web 2 during the treatment can, as stated, be checked by marking the raw fabric and comparing the dimensions accordingly.
  • the mercerizing machine 1 is divided into sections with fabric tension control 11.1 and 11.2 and a section with a so-called quotient control 12. This means that the drive motors of the treatment stations in the section of the quotient control can be operated at a lower conveying speed than in the previous section.
  • the area of the fabric tension control 11.1 comprises the hot impregnation zone 3 and the cooling zone 4.
  • the loading of the tenter frame 8 and the tenter frame 8 itself is operated by means of quotient control.
  • Known three-phase drives with frequency converters are used as the drive system for the various treatment stations (VSI, i.e. voltage source inverter).
  • Crushes 13.1-13.5 are driven by drive motors (three-phase motors) 14.1-14.5, the speed of which is controlled by a first line setpoint 15.1 or a second line setpoint 15.2.
  • the setpoints 15.1 and 15.2 are on lines 51 and 52 and are output from there to summing elements 16.1 to 16.4 and frequency converters 17.1 to 17.5.
  • each of these drive motors 14.1 - 14.4 (with the exception of the guide motor 14.5) is assigned a fabric tension control roller 18.1 - 18.4, the deflection position of which is recorded in a known manner via a sensor (not shown) and a deflection angle calculator 19.1 - 19.4.
  • the summing elements 16.1-16.4 the feedback signals emitted by the computers 19.1-19.4 are superimposed on the first and second setpoints applied via line 51 and 52, respectively, in accordance with the deflection of the associated fabric tension regulator roller 18.1-18.4.
  • the fabric tension regulator rollers 18.1-18.4 are arranged in a known manner in such a way that even with different roller deflections, a bound fabric guidance and uniform fabric tension are always guaranteed. Such arrangements are state of the art.
  • the first setpoint 15.1 is set on a preselection device 20.1 and connected to line 51 via a voltmeter 21 used for the display.
  • the voltmeter 21 is calibrated to the speed of the treatment stations or the fabric web 2 corresponding to the setpoint 15.1.
  • the line 51 passes the first setpoint 15.1 to a multiplier 23, the output of which passes the second setpoint 15.2 to the line 52.
  • the multiplication factor of the multiplier 23 is adjustable in a known manner and it is therefore connected to a second preselection device 20.2 via a% display device 22. If the preselection device 20.2 is set to the value zero, the output of the multiplier 23 corresponds to the input, i.e. that the second setpoint on line 52 would correspond to the first setpoint on line 51. Changing the input on the preselection device 20.2 leads to a change in the multiplication factor and thus to an increase in the second setpoint value 15.2 output at the output of the multiplier 23 compared to the first setpoint value 15.1 present at the input.
  • Increasing the setpoint 15.1 causes the summation elements 16.1 to 16.3 and 30 to be fed with a higher speed setpoint, which means that the transport of goods in the area of the hot impregnation zone 3, the cooling zone 4 and the exposure zone 5 is accelerated.
  • the tenter frame 8 is driven by a tenter frame drive 24 and a drive motor 25.
  • a tension roller 26 is provided in front of the stenter, which is driven by a drive motor 27 is driven.
  • the drive motor 25 is connected via a summing element 28 and a frequency converter 29, the summing element 28 being connected to the line 51 via a second multiplier 41, that is to say fed by the first setpoint 15.1.
  • the drive motor 27 is fed by the frequency converter 31, which is connected to the summing element 30, which is fed by the line 52, ie by the second setpoint 15.2.
  • the speed of the pull roller 26 is thus fed by the second setpoint (after the multiplier 23), while the speed of the drive motor 25 for the tenter frame 8 is determined by the first setpoint 15.1.
  • a drop in the conveying speed can thus be generated by appropriate adjustment of the preselection device 20.2, with which the goods can shrink in a controlled manner before entering the tenter frame.
  • Tachometers 35 and 33 and evaluation circuits 36 and 34 are also provided in the control loops of the drive motors 27 and 25, whereby a speed-dependent control behavior can be set.
  • the control in areas 11.1 and 11.2 in the areas of fabric tension control works in a known manner as follows: in the delivery of the fabric web faults in front of the pull roller 26, then the drive motor 14.3 of the pinch 13.3 is influenced accordingly via the previous fabric tension regulator roller 18.3 and the conveying speed of the fabric web 2 is increased or decreased accordingly; this leads - with a delay - to the same process in the fabric tension regulator roller 18.2 or 18.1 in front of it, which has the consequence that the conveying speed of the fabric web 2 in the action zone 5, the cooling zone 4 and the hot impregnation zone 5 adjusts so that the disruption that has occurred is compensated for and the fabric web 2 is conveyed under uniform tension.
  • a tension regulator roller 38 is provided at the outlet of the tensioning frame 8. If there is a change in the tension in the fabric web 2, ie that too much or too little tissue is being conveyed by the tensioning frame 8, feedback signals are output to the multiplier 41 via an angle computer 39 and an evaluation circuit 40. These feedback signals are used via the summing elements 28, 30 both for readjustment of the drive motor 25 for the clamping frame 8 and of the drive motor 27 for the pull roller 26.
  • a needle roller 37 in the outlet of the tensioning frame 8 guides it again bound to the fabric web, tension-dependent readjustment e.g. Via a fabric tension regulator roller 18.4, a computer 19.4, the summing element 16.4, the frequency converter 17.4 and the drive motor 14.4 can take place in the manner already described. Since the fabric web 2 is already largely stabilized by the intensive spraying by means of the spray tubes 10 when it leaves the tensioning frame 8, it is easily possible to transport it largely dimensionally stable through the bound guide in the roller zone 9.
  • FIG. 2 shows the mercerizing machine 1 according to FIG. 1 identically. For the sake of clarity, only the most important reference numerals are shown and the electrical circuit has been omitted.
  • FIG. 3a shows schematically how the fabric width of the fabric web 2 can behave as it passes through the mercerizing machine 1.
  • 63 denotes the fabric width, 64 a set target width and 65 the respective actual width.
  • the width loss increases somewhat in zones 3, 4 and 5 with bound web guidance. After the pull roller 26 and in the area of the free path 32, the loss in width increases sharply. This results from the unbound, loose fabric guidance in this area.
  • the fabric web 2 is then spread out in the spreading zone 7 in such a way that it leaves the tensioning frame 8 with an excessive amount. This excess is set because in the roller zone 9 a loss of width can still be expected until the final stabilization, or residual shrinkage can also occur in the final equipment due to the longitudinal tension on the fabric web 2.
  • FIG. 3b shows schematically how the fabric web 2 behaves with regard to its fabric length 66 (unit length) when it passes through the mercerizing machine 1.
  • 67 is a desired target tissue length
  • 68 is the respective actual tissue length.
  • the fabric web 2 is already stretched through the pretreatment and enters the mercerizing machine with excess length.
  • a reduction in length can occur even before the free path 32.
  • the non-bound fabric guidance of the fabric web and the lead difference can then cause a strong difference Shorten to below the setpoint. Since a longitudinal stretching of the fabric web 2 can still take place during the passage through the roller zone 9 and possibly also through subsequent post-treatment processes, the goods are handed over at the exit of the tenter frame 8 with a small descent.
  • the changes in width and length of the fabric web in the free path 32 and in the clamping frame 8 can be adjusted in the manner described above by adjusting the preselection device 20.2 in individual cases to desired parameters. As a rule, the spreading behavior of the fabric web 2 in the tenter frame 8 is promoted the more, the more loosely the fabric web 2 is transferred in the free path 32.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (9)

  1. Procédé pour tirer en largeur un tissu en continu (2) dans une machine de mercerisage (1), le tissu en continu (2) passant dans une chaîne de traitement (3, 4, 5, 6, 7, 9) constituée par des postes de traitement commandés individuellement ou par des groupes de tels postes, le tissu en continu (2) étant d'abord guidé selon un guidage assujetti dans des zones de traitement par voie humide (3, 4, 5) et ensuite amené à un cadre tendeur (8), le tissu en continu étant directement amené de la zone avec guidage assujetti au cadre tendeur, caractérisé en ce que la vitesse d'alimentation du tissu en continu (2) hors de la zone du guidage assujetti (zones 3, 4, 5) et la vitesse d'alimentation du cadre tendeur (8) sont réglées l'une par rapport à l'autre de telle manière que le tissu en continu est amené au cadre tendeur à une vitesse plus élevée que celle à laquelle il est acheminé à partir de celui-ci, et en ce que le tissu en continu est guidé librement entre la zone du guidage assujetti et le cadre tendeur (passage libre 32), de telle manière qu'une modification en largeur et en longueur puisse être effectuée dans cette zone.
  2. Procédé selon la revendication 1, caractérisé en ce que la commande (24) du cadre tendeur est dirigée avec une première valeur de consigne de la vitesse et en ce que les organes d'entraînement (14.1, 14.2, 14.3, 27) des postes de traitement avant le cadre tendeur sont commandés avec une seconde valeur de consigne de la vitesse et sont chaque fois réglés au moyen de régulateurs de traction de tissu (18.1, 19.1 ; 18.2, 19.2; 18.3, 19.3) à une vitesse d'entraînement maintenant constante la traction du tissu.
  3. Procédé selon la revendication 2, caractérisé en ce que le tissu en continu est évacué en guidage assujetti du cadre tendeur (8), en ce que la tension du tissu dans la zone de la sortie du cadre tendeur est déterminée, et en ce que la vitesse d'acheminement du tissu en continu (2) dans le cadre tendeur (8) est réglée en fonction de la première valeur de consigne de la vitesse et à partir de la tension du tissu déterminée.
  4. Dispositif pour la mise en oeuvre du procédé selon la revendication 1, avec un arrangement de rouleaux pour le guidage assujetti (zones 3, 4, 5) et un rouleau d'entraînement (26) avant l'entrée dans le cadre tendeur (8), caractérisé en ce que, entre le rouleau d'entraînement (26) et l'entrée, de tissu en continu (2) s'étend librement et directement, sur une longueur libre (32), jusqu'au cadre tendeur (8), dans lequel une modification en largeur et en longueur peut avoir lieu, et en ce que le tissu en continu peut être amené à partir de l'arrangement de rouleaux au cadre tendeur à une vitesse plus élevée que celle à laquelle il est acheminé à partir de ce dernier.
  5. Dispositif selon la revendication 4, caractérisé en ce que les moteurs d'entraînement (14.1, 14.2, 14.3, 14.4) des rouleaux (13.1, 13.2, 13.3, 13.4) des postes de traitement avant et après le cadre tendeur (8) peuvent être commandés d'une part par des circuits de réglage (16.1 à 16.4 ; 17.1 à 17.4 ; 18.1 à 18.4 ; 19.1 à 19.4) pour maintenir constante la tension du tissu en continu (2) et, d'autre part, par au moins un dispositif (20.1, 23) pour fournir une première et une seconde valeurs de consigne (15.1, 15.2).
  6. Dispositif selon la revendication 5, caractérisé en ce que le dispositif (20.1) pour fournir une première valeur de consigne de la vitesse (15.1) est relié au circuit de réglage (28, 29, 33, 34) de la commande (24) du cadre tendeur ou au circuit de réglage (16.4, 17.4, 18.4, 19.4) du moteur d'entraînement (14.4) monté après le cadre tendeur (8) ainsi qu'à un dispositif multiplicateur de signaux (23), et en ce que la seconde valeur de consigne (15.2) est fournie à la sortie du dispositif multiplicateur et appliquée aux circuits de réglage (16.1 à 16.3 ; 17.1 à 17.3 ; 18.1 à 18.3 ; 19.1 à 19.3 ; 30, 31, 35, 36) des moteurs d'entraînement (14.1, 14.2, 14.3, 27) montés en amont du cadre tendeur (8).
  7. Dispositif selon la revendication 6, caractérisé en ce que le moteur d'entraînement (25) pour la commande (24) du cadre de mise en tension présente un circuit de réglage avec un palpeur (38) pour maintenir constante la tension du tissu en continu (2) à la sortie du cadre tendeur.
  8. Dispositif selon la revendication 7, caractérisé en ce que le dispositif de comparaison (28) du circuit de réglage (28, 29, 33, 34) pour la commande du cadre tendeur est relié au dispositif (20.1) pour fournir la première valeur de consigne.
  9. Dispositif selon l'une quelconque des revendications 4 à 8, caractérisé en ce que le moteur d'entraînement (27) pour le rouleau d'entraînement (26) et le moteur d'entraînement (25) pour la commande (24) du cadre tendeur présentent chacun un circuit de réglage (30, 31, 35, 36 et 28, 29, 33, 34), et en ce qu'il est adjoint, de manière commune aux deux circuits de réglage un arrangement de détection et de réaction (38, 39, 40, 41) pour le réglage proportionnel des vitesses d'entraînement correspondantes lors de l'apparition de variations de tension à la sortie du cadre tendeur (8).
EP19890810211 1988-03-31 1989-03-17 Procédé et installation pour étirer un tissu en largeur Revoked EP0335833B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH122488 1988-03-31
CH1224/88 1988-03-31

Publications (2)

Publication Number Publication Date
EP0335833A1 EP0335833A1 (fr) 1989-10-04
EP0335833B1 true EP0335833B1 (fr) 1993-07-28

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EP19890810211 Revoked EP0335833B1 (fr) 1988-03-31 1989-03-17 Procédé et installation pour étirer un tissu en largeur

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DE (1) DE58905003D1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025537A (en) * 1990-05-24 1991-06-25 E. I. Du Pont De Nemours And Company Process for making preshrunk size-free denim

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH531969A (de) * 1971-06-02 1972-12-31 Benninger Ag Maschf Verfahren und Einrichtung zum Steuern des Durchlaufes einer Warenbahn durch eine von einzelgetriebenen Behandlungsstationen oder Gruppen solcher Stationen gebildete Behandlungsstrasse
JPS5241398B2 (fr) * 1974-05-10 1977-10-18
CH673746B5 (fr) * 1985-03-21 1990-10-15 Benninger Ag Maschf

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DE58905003D1 (de) 1993-09-02

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