EP1573110A1 - Device for finishing denim woven fabric - Google Patents

Device for finishing denim woven fabric

Info

Publication number
EP1573110A1
EP1573110A1 EP03814448A EP03814448A EP1573110A1 EP 1573110 A1 EP1573110 A1 EP 1573110A1 EP 03814448 A EP03814448 A EP 03814448A EP 03814448 A EP03814448 A EP 03814448A EP 1573110 A1 EP1573110 A1 EP 1573110A1
Authority
EP
European Patent Office
Prior art keywords
fabric
stretching
measuring device
weft
web
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
EP03814448A
Other languages
German (de)
French (fr)
Other versions
EP1573110B1 (en
Inventor
Kurt Van Wersch
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.)
Van Wersch Kurt
Original Assignee
A Monforts Textilmaschinen GmbH and Co KG
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
Priority claimed from DE10307914A external-priority patent/DE10307914A1/en
Application filed by A Monforts Textilmaschinen GmbH and Co KG filed Critical A Monforts Textilmaschinen GmbH and Co KG
Publication of EP1573110A1 publication Critical patent/EP1573110A1/en
Application granted granted Critical
Publication of EP1573110B1 publication Critical patent/EP1573110B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00—Inspecting textile materials
    • D06H3/12—Detecting or automatically correcting errors in the position of weft threads in woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C21/00—Shrinking by compressing
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C27/00—Compound processes or apparatus, for finishing or dressing textile fabrics, not otherwise provided for
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics

Definitions

  • the invention relates to a device for equipping a denim fabric web, which - starting from a raw material - is to be brought to predetermined target values of finished width, bias warp and weft thread density, with an expansion device, e.g. Stretching device or hot flue, which is associated with both stretching means for elongating the fabric and inclined means for applying an inclined draft, and with a shrinking system associated with continuous operation, preferably downstream, with upsetting means for setting a weft thread density.
  • an expansion device e.g. Stretching device or hot flue, which is associated with both stretching means for elongating the fabric and inclined means for applying an inclined draft, and with a shrinking system associated with continuous operation, preferably downstream, with upsetting means for setting a weft thread density.
  • a denim finishing line Such a device is also referred to as a denim finishing line.
  • the denim process chain in the manufacture of denim garments e.g. So-called jeans, starting from the raw fabric, includes the so-called denim finishing - also called fabric finishing. This includes drying, longitudinal stretching and so-called diagonal stretching as well as making the fabric resistant to shrinkage. In the aforementioned skewing, the fabric is drawn diagonally with respect to the warp and weft (skew). In practice, special diagonal stretchers are used for this.
  • Denim raw goods are usually produced with a raw width, for example 162 cm, which is significantly larger than the finished width, for example 151 cm.
  • the raw material is drawn out in length.
  • the resulting reduced weft thread density (number of threads per unit length) is then used when compressing the web in a shrinking system - especially with a rubber band shrinking unit Core machine - brought to the desired value.
  • DE 43 23 715 A1 discloses a measurement and control method with which the setpoint value of the shrinkage to be achieved is determined and is specified as a control variable for the rubber band shrinking unit.
  • the residual shrinkage and the thread density per centimeter are directly dependent on each other for a given quality, ie if you know the thread density at the exit of the finishing line, the residual shrinkage value is also given.
  • the stretching of a denim fabric web can be carried out in a conventional stretching device having a plurality of upper and lower rollers or, for example, also in a loop dryer - hot flue for short - if the latter has appropriate longitudinal stretching means.
  • a suitable hotflue is described in DE 33 36 328 C2. It comprises an upper series and a lower series of guide rolls. As is known, the two guide roller series are mounted parallel to one another and horizontally - essentially in one plane each - in a housing.
  • the housing has a horizontal inlet slot in an inlet wall, through which the material web to be treated is to be inserted; accordingly there is an outlet slot in an outlet wall.
  • the (straight) connecting line between the inlet and the outlet slot defines the mean transport direction of the fabric in the hot flue.
  • the fabric web is alternately transported in a loop or meandering shape over a lower and an upper guide roller.
  • Arranged parallel to the guide rollers are rows of blow nozzles provided with the aid of which treatment agents, in particular heated air - generally recirculated air - can be blown onto the fabric web or into the stretched fabric web loops.
  • the fabric web is held within the hotflue - with the aid of the web tensioning means which are placed in front of and behind the dryer - under a predetermined web tension.
  • This longitudinal tension should be at least so great that an essentially wrinkle-free flow of goods within the hot flue is ensured even with a goods content of thirty or more fabric web meters.
  • the oblique warping of the weft threads mentioned at the outset that is, an inclination of the weft threads relative to the warp threads of the fabric that differs significantly from 90 °, is achieved when using a conventional stretching device, for example, by inclining part of the stretching device rollers.
  • the upper stretching rollers are lifted vertically on one side (at one longitudinal end) or the lower rollers are lowered vertically on one side.
  • the invention has for its object to combine a stretching device, such as a stretcher or a hot flue with a connected spreading field (for adjusting the fabric width), and a rubber band shrinking unit (as a core machine for an adjustable longitudinal shrinkage) and to control the system so that the for the decisive parameters for the loss of goods are residual shrinkage, skewing and width.
  • a stretching device such as a stretcher or a hot flue with a connected spreading field (for adjusting the fabric width)
  • a rubber band shrinking unit as a core machine for an adjustable longitudinal shrinkage
  • the device for finishing denim fabric starting from a raw material preferably comprises a stretching device or a hot flue as the stretching device, the stretching device being associated with both stretching means for elongating the fabric and inclined means for applying an oblique warping, and a shrinking system with upsetting means for continuous operation Setting a (especially a predetermined) thread density.
  • the device contains a single measuring device for recording the actual values of fabric width, warping distortion and weft thread density, which is in a control loop in control connection with the stretching and inclining means of the stretching device on the one hand and the upsetting means of the shrinking system on the other hand for adjusting the respective target values ,
  • the measuring device should preferably be connected directly downstream of the stretching device (in particular the stretching unit or the spreading field of the hotflue) or the shrinking system. "Immediately downstream” means that the fabric stock between the device to be controlled (stretcher or hotflue or shrinking system) and the measuring device should be minimal in order to keep the amount of the goods which may be incompletely treated up to the switching of the control circuit The least possible loss of material web is to be expected, however, if the measuring device is also connected upstream of the first material web equipment stage - generally the stretcher or the hot flue. Aids, for example web tension regulators, can be arranged between the device to be controlled and the measuring device.
  • Aids for example web tension regulators
  • the width of the fabric web (at the expense of the weft thread density) and the skew of the weft threads are set to a predetermined target value.
  • the weft thread density previously reduced is also brought to a predetermined target value in the shrinking system. According to the invention, both steps are controlled using one and the same measuring device.
  • an optical detector with a digital camera is preferably used as the measuring device, which can detect the thread density, the skew and the width of the fabric.
  • the detector should be carried out traversing in its measurement and control work transversely to the direction of transport of the fabric in order to ensure that it can simultaneously register the fabric width, the amount of skew and the weft density and enter it in the associated control loop.
  • the measuring device is connected upstream of the stretching device but upstream of the shrinking system, e.g. from the digital camera with optical detector, the following control pulses (for setting the respective setpoints) emanate
  • the measuring device forwards on the servomotor of the pressure roller of the rubber band shrinking unit, so that the specified shrinkage is achieved by changing the rubber band pressure. If the measuring device is positioned in front of the stretching device and in front of the shrinking unit on the fabric, all three parameters must be adjusted forward. It is also within the scope of the invention to mount the measuring device at the end of the equipment line, that is to say after the shrinking system, even immediately before winding, panels or the like, so that the three parameters described above are all regulated in reverse.
  • Figure 1 shows an overall system according to the invention in vertical longitudinal section. and FIG. 2 shows a section along the line II-II from FIG. 1.
  • Fig. 1 is a in the fabric web 1 from roll 2 in the direction of transport 3 by a first clamping means 4 in a total designated 5 hot flue with housing
  • the housing 6 has a substantially horizontal inlet slot
  • the upper guide rollers 11 are placed at one of their longitudinal ends 21 in spherical bearings 22 and at the other of their longitudinal ends 23 on a beam 24 which - as shown in FIGS. 1 and 2 - at its one longitudinal end 25 is held in a tilting bearing 26 and at the other (in the web transport direction 2 following) longitudinal end 27 on an inclined actuator 28 rests.
  • An inclination control device 29 is assigned to the latter. In the transport direction 3, the tilt bearing 26 and the longitudinal end 27 come first with the inclined positioner.
  • a clamping device 14 according to the invention is directly connected to a measuring device 30 according to the invention.
  • a shrinking system 31 with a shrinkage control device 32 and upsetting means 33 follows in the transport direction 3.
  • the finished fabric can be wound up on a roll 35 by means of a tension regulator 34.
  • the fabric width, the skew and the weft density are determined.
  • the device expenditure remains relatively low if the measuring device 30 is transverse to the transport direction 2 of the fabric web 1, e.g. can be traversed on a rail arranged transversely to the transport direction 3.
  • the measuring head moving back and forth in a correspondingly defined manner, it is possible in a relatively simple manner to measure the actual values of the width of the web, the draft and the weft density achieved in the hot flue 5 (from the first tensioning means 4 to the second tensioning means 14) almost continuously.
  • the values thus determined in the measuring device 30 are fed to the control devices 19 and 29 (longitudinal pull and oblique warping) and to the shrink control device 32 along the dashed lines of action in such a way that a respective control circuit is created for adjusting predetermined target values.
  • the measuring device 30 is connected upstream of the shrinking system 31.
  • the measuring device can be connected downstream of the shrinking system.
  • a measuring device 30 ' which is preferably designed in the same way as the measuring device 30, is shown in broken lines in FIG. 1.
  • the associated control lines - connections to control units 19, 29 and 32 - are characterized by dotted lines of action.
  • the measuring device 30 "is even connected upstream of the first stage of the equipment, for example also the hot flue. The loss of incorrectly equipped fabric web carrier can then be kept very low.
  • the lines of action associated with the position of the measuring device 30" are shown in dash-dot lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Woven Fabrics (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention relates to a device for finishing denim woven fabric (1) that, starting from a gray fabric, is brought to predetermined set values with regard to finished width, skewed weft and density of weft. The device should be designed for a continuous operation for adjusting all three set values. According to the invention, a stretching device, such as a drawing frame or a loop drier (5), and a shrinking system (31) for continuously passing the denim woven fabric (1) therethrough are connected one behind the other. A sole measuring unit (30), preferably provided in the form of an optical detector with a digital camera, is placed directly behind the stretching device (5), in particular, also behind the shrinking system (31). The measuring unit (30) is also designed for determining the actual values of the finished width, skewed weft and density of weft and, in control loops, should be control-connected to units for adjusting the set values.

Description

Vorrichtung zum Ausrüsten von Denim-Gewebe' Device for finishing denim fabric '
Beschreibung:Description:
Die Erfindung betrifft eine Vorrichtung zum Ausrüsten einer Denim-Stoffbahn, welche - ausgehend von einer Rohware - auf vorgegebene Soll-Werte von Fertigbreite, Schrägverzug und Schußfadendichte zu bringen ist, mit einer Dehneinrichtung, z.B. Reckwerk oder Hotflue, welcher sowohl Streckmittel zum Langziehen des Gewebes als auch Schrägstellmittel zum Aufbringen eines Schrägverzugs zugeordnet sind, und mit einer im Kontinuebetrieb zugeordneten, bevorzugt nachgeschalteten, Krumpfanlage mit Stauchmitteln zum Einstellen einer Schußfadendichte. Eine solche Vorrichtung wird auch als Denim-Ausrüstungsstraße bezeichnet.The invention relates to a device for equipping a denim fabric web, which - starting from a raw material - is to be brought to predetermined target values of finished width, bias warp and weft thread density, with an expansion device, e.g. Stretching device or hot flue, which is associated with both stretching means for elongating the fabric and inclined means for applying an inclined draft, and with a shrinking system associated with continuous operation, preferably downstream, with upsetting means for setting a weft thread density. Such a device is also referred to as a denim finishing line.
Die Denim-Prozeßkette bei der Fabrikation von Denim-Kleidungsstücken, z.B. sogenannter Jeans, umfaßt ausgehend vom Rohgewebe die sogenannte Denim- Veredlung - auch Gewebeausrüstung genannt. Hierzu gehören das Trocknen, Längsrecken und das sogenannte Schrägrecken sowie das Krumpffest-Machen der Stoffbahn. Bei dem vorgenannten Schrägrecken (englisch: skewing) wird das Gewebe diagonal in Bezug auf Kette und Schuß (Schrägverzug) gezogen. Hierzu werden in der Praxis spezielle Schrägreckwerke benutzt.The denim process chain in the manufacture of denim garments, e.g. So-called jeans, starting from the raw fabric, includes the so-called denim finishing - also called fabric finishing. This includes drying, longitudinal stretching and so-called diagonal stretching as well as making the fabric resistant to shrinkage. In the aforementioned skewing, the fabric is drawn diagonally with respect to the warp and weft (skew). In practice, special diagonal stretchers are used for this.
Denim-Rohware wird normalerweise mit einer Rohbreite, z.B. 162 cm, hergestellt, die deutlich größer als die Fertigbreite, z.B. 151 cm, ist. Um die Fertigbreite zu erhalten, wird die Rohware in die Länge gezogen. Die dadurch verkleinerte Schußfadendichte (Fadenzahl pro Längeneinheit) wird anschließend beim Stauchen der Bahn in einer Krumpfanlage - insbesondere mit Gummibandkrumpfaggregat als Kernmaschine - auf den gewünschten Wert gebracht. Ein Meß- und Regelverfahren, mit dem der Sollwert des zu erzielenden Warenschrumpfes ermittelt und als Regelgröße dem Gummibandkrumpfaggregat vorgegeben wird, ist aus DE 43 23 715 A1 bekannt. Der Restschrumpf und die Fadendichte pro Zentimeter stehen für eine gegebene Qualität in direkter Abhängigkeit zueinander, d.h. wenn man die Fadendichte am Ausgang der Ausrüstungsstraße kennt, ist auch der Rest- schrumpfwert gegeben.Denim raw goods are usually produced with a raw width, for example 162 cm, which is significantly larger than the finished width, for example 151 cm. In order to obtain the finished width, the raw material is drawn out in length. The resulting reduced weft thread density (number of threads per unit length) is then used when compressing the web in a shrinking system - especially with a rubber band shrinking unit Core machine - brought to the desired value. DE 43 23 715 A1 discloses a measurement and control method with which the setpoint value of the shrinkage to be achieved is determined and is specified as a control variable for the rubber band shrinking unit. The residual shrinkage and the thread density per centimeter are directly dependent on each other for a given quality, ie if you know the thread density at the exit of the finishing line, the residual shrinkage value is also given.
Das Langziehen einer Denim-Stoffbahn kann in einem herkömmlichen, eine Mehrzahl von oberen und unteren Walzen aufweisenden Reckwerk oder beispielsweise auch in einem Schleifentrockner - kurz Hotflue - erfolgen, wenn letzterer entsprechende Längsreckmittel besitzt. Eine geeignete Hotflue wird beschrieben in DE 33 36 328 C2. Sie umfaßt eine obere Serie und eine untere Serie von Leitwalzen. Die beiden Leitwalzenserien werden im Bekannten parallel zueinander und horizontal - im Wesentlichen in je einer Ebene - in einem Gehäuse gelagert. Das Gehäuse besitzt in einer Einlaßwand einen waagerechten Einlaßschlitz, durch welchen die zu behandelnde Stoffbahn ausgebreitet einzuführen ist; entsprechend gibt es in einer Auslaßwand einen Auslaßschlitz.The stretching of a denim fabric web can be carried out in a conventional stretching device having a plurality of upper and lower rollers or, for example, also in a loop dryer - hot flue for short - if the latter has appropriate longitudinal stretching means. A suitable hotflue is described in DE 33 36 328 C2. It comprises an upper series and a lower series of guide rolls. As is known, the two guide roller series are mounted parallel to one another and horizontally - essentially in one plane each - in a housing. The housing has a horizontal inlet slot in an inlet wall, through which the material web to be treated is to be inserted; accordingly there is an outlet slot in an outlet wall.
Die (gerade) Verbindungslinie zwischen vom Einlaß- zum Auslaßschlitz definiert die mittlere Transportrichtung der Stoffbahn in der Hotflue. Tatsächlich wird die Stoffbahn aber schleifenförmig bzw. mäanderförmig abwechselnd über eine untere und eine obere Leitwalze transportiert. Innerhalb des Gehäuses werden parallel zu den Leitwalzen angeordnete Blasdüsenreihen vorgesehen, mit deren Hilfe Behandlungsmittel, insbesondere erhitzte Luft - im Allgemeinen Umluft - auf die Stoffbahn bzw. in die aufgespannten Stoffbahnschleifen zu blasen ist.The (straight) connecting line between the inlet and the outlet slot defines the mean transport direction of the fabric in the hot flue. In fact, the fabric web is alternately transported in a loop or meandering shape over a lower and an upper guide roller. Arranged parallel to the guide rollers are rows of blow nozzles provided with the aid of which treatment agents, in particular heated air - generally recirculated air - can be blown onto the fabric web or into the stretched fabric web loops.
Die Stoffbahn wird innerhalb der Hotflue - mit Hilfe von dem Trockner vor- und nachgestellten Bahnspannungsmitteln - unter einer vorgegebenen Stoffbahnlängsspannung gehalten. Diese Längsspannung soll mindestens so groß sein, daß auch bei einem Wareninhalt von dreißig oder mehr Stoffbahn-Metern ein im Wesentlichen faltenfreier Warenlauf innerhalb der Hotflue gewährleistet wird. Der eingangs genannte Schrägverzug der Schußfäden, das ist eine von 90° deutlich abweichende Schrägstellung der Schußfäden relativ zu den Kettfäden des Gewebes, wird bei Einsatz eines herkömmlichen Reckwerks beispielsweise durch Schrägstellen eines Teils der Reckwerkwalzen erreicht. Meist werden die oberen Reckwerkwalzen einseitig (an einem Längsende) vertikal angehoben oder die unteren Walzen einseitig vertikal abgesenkt.The fabric web is held within the hotflue - with the aid of the web tensioning means which are placed in front of and behind the dryer - under a predetermined web tension. This longitudinal tension should be at least so great that an essentially wrinkle-free flow of goods within the hot flue is ensured even with a goods content of thirty or more fabric web meters. The oblique warping of the weft threads mentioned at the outset, that is, an inclination of the weft threads relative to the warp threads of the fabric that differs significantly from 90 °, is achieved when using a conventional stretching device, for example, by inclining part of the stretching device rollers. Usually, the upper stretching rollers are lifted vertically on one side (at one longitudinal end) or the lower rollers are lowered vertically on one side.
Als Schrägstellmittel zum Erzeugen eines Schrägverzugs ist auch schon vorgeschlagen worden (nicht vorveröffentlichte deutsche Patentanmeldungen 102 34 799.9 vom 31. Juli 2002), für Denimware eine Hotflue vorzusehen, der Mittel zum Ausüben eines Längszugs - also Streckmittel - vor- und nachgeschaltet sind und in deren Gehäuse wenigstens eine Gruppe mindestens einer Leitwalzenserie in einer Richtung schräggekippt werden kann. Kern der zugehörigen Erkenntnis ist es, daß allein durch Schrägstellen wenigstens eines Teils der Leitwalzen der Hotflue ein gesondertes Schrägstellgerät ganz einzusparen ist. Durch das Schrägstellen der Leitwalzen wird der übrige normal erwartete Arbeitserfolg der Hotflue nicht beeinträchtigt.It has also already been proposed (not previously published German patent applications 102 34 799.9 dated July 31, 2002) to provide a hot flue for denim ware, which means upstream and downstream of the means for exerting a longitudinal tension - that is to say an extension means - and in their Housing at least one group of at least one guide roller series can be tilted in one direction. The core of the associated finding is that by tilting at least some of the guide rollers of the hot flue, a separate tilting device can be completely saved. The other normal expected success of the hotflue is not affected by the inclination of the guide rollers.
Der Erfindung liegt die Aufgabe zugrunde, in einer Anlage eine Dehneinrichtung, wie Reckwerk oder eine Hotflue mit angeschlossenem Breitstreckfeld (zum Einstellen der Warenbreite), und ein Grummibandkrumpfaggregat (als Kernmaschine für einen einstellbaren Längsschrumpf) zusammenzufassen und die Anlage so zu steuern, daß die für den Warenausfall entscheidenden Parameter Restschrumpf, Schrägverzug und Breite reproduzierbar konstant bleiben. Mit anderen Worten soll in der kombinierten Anlage erreicht werden, daß beim Ausrüsten von Denim- Gewebe vorgegebene Soll-Werte von Stoffbahnbreite, Schrägverzug und Schußfadendichte in einem Zuge kontinuierlich zu erhalten sind.The invention has for its object to combine a stretching device, such as a stretcher or a hot flue with a connected spreading field (for adjusting the fabric width), and a rubber band shrinking unit (as a core machine for an adjustable longitudinal shrinkage) and to control the system so that the for the decisive parameters for the loss of goods are residual shrinkage, skewing and width. In other words, the aim of the combined system is to ensure that predetermined nominal values for the width of the fabric web, the bias and the weft thread density can be obtained continuously in one go when finishing the denim fabric.
Die erfindungsgemäße Lösung wird für die eingangs genannte Vorrichtung im Kennzeichen des Anspruchs 1 angegeben. Einige Verbesserungen und weitere Ausgestaltungen der Erfindung werden in den Unteransprüchen beschrieben. Die Vorrichtung zum Ausrüsten von Denim-Gewebe ausgehend von einer Rohware umfaßt vorzugsweise als Dehneinrichtung ein Reckwerk oder eine Hotflue, wobei der Dehneinrichtung sowohl Streckmittel zum Langziehen des Gewebes als auch Schrägstellmittel zum Aufbringen eines Schrägverzugs zugeordnet sind, und eine im Kontinuebetrieb arbeitende Krumpfanlage mit Stauchmitteln zum Einstellen einer (insbesondere einer vorgegebenen) Fadendichte. Erfindungsgemäß enthält die Vorrichtung ein einziges Meßgerät zum Erfassen der Ist-Werte von Warenbreite, Schrägverzug und Schußfadendichte, welches in je einem Regelkreis in Steuerverbindung mit den Streck- und Schrägstellmitteln der Dehneinrichtung einerseits und den Stauchmitteln der Krumpfanlage andererseits zum Einregeln der jeweiligen Soll-Werte steht.The solution according to the invention is specified for the device mentioned in the characterizing part of claim 1. Some improvements and further refinements of the invention are described in the subclaims. The device for finishing denim fabric starting from a raw material preferably comprises a stretching device or a hot flue as the stretching device, the stretching device being associated with both stretching means for elongating the fabric and inclined means for applying an oblique warping, and a shrinking system with upsetting means for continuous operation Setting a (especially a predetermined) thread density. According to the invention, the device contains a single measuring device for recording the actual values of fabric width, warping distortion and weft thread density, which is in a control loop in control connection with the stretching and inclining means of the stretching device on the one hand and the upsetting means of the shrinking system on the other hand for adjusting the respective target values ,
Vorzugsweise soll das Meßgerät der Dehneinrichtung (also insbesondere dem Reckwerk bzw. dem Breitstreckfeld der Hotflue) oder der Krumpfanlage unmittelbar nachgeschaltet werden. „Unmittelbar nachgeschaltet" bedeutet hierbei, daß der Stoffbahnvorrat zwischen der zu steuernden Vorrichtung (Reckwerk bzw. Hotflue oder Krumpfanlage) und dem Meßgerät minimal sein soll, um die Menge der bis zum Schalten des Regelkreises eventuell unvollkommen behandelten Ware klein zu halten. Der in diesem Sinne geringste Stoffbahnverlust ist allerdings zu erwarten, wenn das Meßgerät auch der ersten Stoffbahnausrüstungsstufe - im allgemeinen also dem Reckwerk oder der Hotflue - vorgeschaltet wird. Zwischen der zu steuernden Vorrichtung und dem Meßgerät können Hilfsmittel, z.B. Bahnspannungsregler, angeordnet werden.The measuring device should preferably be connected directly downstream of the stretching device (in particular the stretching unit or the spreading field of the hotflue) or the shrinking system. "Immediately downstream" means that the fabric stock between the device to be controlled (stretcher or hotflue or shrinking system) and the measuring device should be minimal in order to keep the amount of the goods which may be incompletely treated up to the switching of the control circuit The least possible loss of material web is to be expected, however, if the measuring device is also connected upstream of the first material web equipment stage - generally the stretcher or the hot flue. Aids, for example web tension regulators, can be arranged between the device to be controlled and the measuring device.
Durch die Erfindung wird erreicht, daß die Soll-Werte von Stoffbahnbreite, Schrägverzug und Schußfadendichte in einem Zuge unter Verwendung eines entsprechend ausgebildeten Reckwerks oder einer entsprechend ausgebildeten Hotflue und einer Krumpfanlage sowie von einem einzigen Meßgerät bei kontinuierlichem Weitertransport des in der Anlage in üblicher Weise ausgerüsteten Denim- Gewebes zu erreichen ist. In einem ersten Schritt werden die Stoffbahnbreite (auf Kosten der Schußfadendichte) und der Schrägverzug der Schußfäden auf einen vorgegebenen Soll-Wert eingestellt. In dem kontinuierlich nachfolgenden zweiten Schritt wird in der Krumpfanlage die zuvor (beim Längsrecken) verkleinerte Schußfadendichte ebenfalls auf einen vorgegebenen Soll-Wert gebracht. Beide Schritte werden erfindungsgemäß mit Hilfe ein und desselben Meßgeräts gesteuert.It is achieved by the invention that the target values of web width, bias and weft density in one go using a suitably designed stretching device or a suitably trained hot flue and a shrinking system and by a single measuring device with continuous further transport of the equipment equipped in the system in the usual way Denim fabric can be reached. In a first step, the width of the fabric web (at the expense of the weft thread density) and the skew of the weft threads are set to a predetermined target value. In the continuously following second step, the weft thread density previously reduced (during longitudinal stretching) is also brought to a predetermined target value in the shrinking system. According to the invention, both steps are controlled using one and the same measuring device.
Im Rahmen der Erfindung wird als Meßgerät bevorzugt ein optischer Detektor mit Digitalkamera, welche die Fadendichte, den Schrägverzug und die Warenbreite erfassen kann, eingesetzt. Der Detektor soll bei seiner Meß- und Regelarbeit quer zur Transportrichtung der Stoffbahn traversierend geführt werden, um zu erreichen, daß er zugleich die Stoffbahnbreite, das Maß des Schrägverzugs und die Schußfadendichte registrieren und in den zugehörigen Regelkreis eingeben kann.In the context of the invention, an optical detector with a digital camera is preferably used as the measuring device, which can detect the thread density, the skew and the width of the fabric. The detector should be carried out traversing in its measurement and control work transversely to the direction of transport of the fabric in order to ensure that it can simultaneously register the fabric width, the amount of skew and the weft density and enter it in the associated control loop.
Wenn das Meßgerät der Dehneinrichtung nach- aber der Krumpfanlage vorgeschaltet ist, sollen von ihm, z.B. von der Digitalkamera mit optischem Detektor, folgende Regelimpulse (zum Einstellen der jeweiligen Sollwerte) ausgehenIf the measuring device is connected upstream of the stretching device but upstream of the shrinking system, e.g. from the digital camera with optical detector, the following control pulses (for setting the respective setpoints) emanate
a) rückwärts auf einen Mechanismus, der gegebenenfalls entweder die obere oder die untere Walzenreihe des Reckwerks oder der Hotflue schrägstellt,a) backwards onto a mechanism which possibly inclines either the upper or the lower row of rollers of the stretcher or the hot flue,
b) rückwärts auf den Druckgeber eines z.B. pneumatisch betätigten Pendels oder den Sollwertsteller einer Bahnkraftregelanlage der Dehneinrichtung, welche im Zusammenspiel mit einer angetriebenen Zugwalze die Warenspannung beim Durchlaufen durch die Dehneinrichtung vergrößern oder verkleinern, so daß die Breite dadurch geändert werden kann, undb) backwards on the pressure transmitter of e.g. pneumatically operated pendulum or the setpoint adjuster of a web tension control system of the stretching device, which, in interaction with a driven pull roller, increase or decrease the fabric tension when passing through the stretching device, so that the width can be changed thereby, and
c) vorwärts auf den Stellmotor der Anpreßwalze des Gummibandkrumpfaggregates, damit durch Verändern der Gummibandanpressung der vorgegebene Warenschrumpf erzielt wird. Wenn das Meßgerät vor der Dehneinrichtung und vor der Krumpfanlage an der Stoffbahn positioniert wird, sind alle drei Parameter vorwärts zu regeln. Es liegt ebenfalls im Rahmen der Erfindung, das Meßgerät am Ende der Ausrüstungsstraße also im Anschluß an die Krumpfanlage, sogar unmittelbar vor dem Aufwickeln, Tafeln oder dergleichen, anzubringen, so daß die drei vorbeschriebenen Parameter alle rückwärts geregelt werden.c) forward on the servomotor of the pressure roller of the rubber band shrinking unit, so that the specified shrinkage is achieved by changing the rubber band pressure. If the measuring device is positioned in front of the stretching device and in front of the shrinking unit on the fabric, all three parameters must be adjusted forward. It is also within the scope of the invention to mount the measuring device at the end of the equipment line, that is to say after the shrinking system, even immediately before winding, panels or the like, so that the three parameters described above are all regulated in reverse.
Anhand der schematischen Darstellung eines Ausführungsbeispiels mit einer Hotflue als Dehneinrichtung werden Einzelheiten der Erfindung erläutert. Es zeigenDetails of the invention are explained on the basis of the schematic illustration of an exemplary embodiment with a hot flue as an expansion device. Show it
Fig. 1 eine erfindungsgemäße Gesamtanlage im vertikalen Längsschnitt; und Fig. 2 einen Schnitt längs der Linie ll-ll von Fig. 1.Figure 1 shows an overall system according to the invention in vertical longitudinal section. and FIG. 2 shows a section along the line II-II from FIG. 1.
Nach Fig. 1 wird eine Den im-Stoff bahn 1 ab Rolle 2 in Transportrichtung 3 durch ein erstes Spannmittel 4 in eine insgesamt mit 5 bezeichnete Hotflue mit GehäuseAccording to Fig. 1 is a in the fabric web 1 from roll 2 in the direction of transport 3 by a first clamping means 4 in a total designated 5 hot flue with housing
6 geleitet. Das Gehäuse 6 besitzt einen im Wesentlichen horizontalen Einlaßschlitz6 headed. The housing 6 has a substantially horizontal inlet slot
7 mit Umlenkwalze 8 sowie im Innern zwei Serien 9 von Leitwalzen 11. Um die Leitwalzen 11 wird die Stoffbahn 1 in mäanderförmigen Schleifen aufwärts und abwärts geführt und schließlich über eine Umlenkwalze 12 durch einen Auslaßschlitz 13 des Gehäuses 6 zu einem zweiten Spannmittel 14 geleitet. Innerhalb des Gehäuses 6 werden in die - zwischen je zwei Leitwalzen 11 einer Walzenserie 9 aufgespannten - Stoffbahnschleifen 16 gerichtete Blasdüsen 17 vorgesehen. Der auf die Stoffbahn 1 innerhalb der Hotflue 5 definiert aufzubringende Längszug wird zwischen den beiden Spannmitteln 4 und 14 - in Richtung der mittleren Transportrichtung 18 der Stoffbahn 1 - mit Hilfe eines Längszug-Steuergeräts 19 eingestellt.7 with deflection roller 8 and inside two series 9 of guide rollers 11. Around the guide rollers 11, the fabric web 1 is guided up and down in meandering loops and finally passed over a deflection roller 12 through an outlet slot 13 of the housing 6 to a second tensioning means 14. Inside the housing 6, blowing nozzles 17 are provided in the fabric web loops 16, which are stretched between two guide rolls 11 of a roll series 9. The longitudinal tension to be applied to the fabric web 1 within the hotflue 5 is adjusted between the two tensioning means 4 and 14 - in the direction of the central transport direction 18 of the fabric web 1 - with the aid of a longitudinal tension control device 19.
Im Ausführungsbeispiel nach Fig. 1 und 2 werden die oberen Leitwalzen 11 an einem ihrer Längsenden 21 in Gelenklager 22 gesetzt und am anderen ihrer Längsenden 23 an einem Balken 24 gelagert, welcher - wie in Fig. 1 und 2 dargestellt - an seinem einen Längsende 25 in einem Kipplager 26 gehalten wird und am anderen (in Bahntransportrichtung 2 nachfolgenden ) Längsende 27 auf einem Schräg- stellgerät 28 ruht. Letzterem wird ein Schrägstell-Steuergerät 29 zugeordnet. In Transportrichtung 3 kommt zuerst das Kipplager 26 und das Längsende 27 mit dem Schrägstellgerät.1 and 2, the upper guide rollers 11 are placed at one of their longitudinal ends 21 in spherical bearings 22 and at the other of their longitudinal ends 23 on a beam 24 which - as shown in FIGS. 1 and 2 - at its one longitudinal end 25 is held in a tilting bearing 26 and at the other (in the web transport direction 2 following) longitudinal end 27 on an inclined actuator 28 rests. An inclination control device 29 is assigned to the latter. In the transport direction 3, the tilt bearing 26 and the longitudinal end 27 come first with the inclined positioner.
In Transportrichtung 3 schließt sich an das Spannmittel 14 nach Fig. 1 erfindungsgemäß ein Meßgerät 30 unmittelbar an. In der Transportrichtung 3 folgt eine Krumpfanlage 31 mit Krumpf-Steuergerät 32 und Stauchmittel 33. Am Schluß kann das ausgerüstete Gewebe über einen Spannungsregler 34 auf eine Rolle 35 aufgewickelt werden.In the direction of transport 3, a clamping device 14 according to the invention is directly connected to a measuring device 30 according to the invention. A shrinking system 31 with a shrinkage control device 32 and upsetting means 33 follows in the transport direction 3. Finally, the finished fabric can be wound up on a roll 35 by means of a tension regulator 34.
In dem Meßgerät 30, welches vorzugsweise als optischer Detektor mit Digitalkamera auszubilden ist, werden die Warenbreite, der Schrägverzug und die Schußfadendichte ermittelt. Der Geräteaufwand bleibt relativ gering, wenn man das Meßgerät 30 quer zur Transportrichtung 2 der Stoffbahn 1 , z.B. an einer quer zu der Transportrichtung 3 angeordneten Schiene, traversieren läßt. Bei entsprechend definiert gesteuert hin- und herfahrendem Meßkopf ist es auf relativ einfache Weise möglich, die in der Hotflue 5 (vom ersten Spannmittel 4 bis zum zweiten Spannmittel 14) erreichten Ist-Werte von Stoffbahnbreite, Schrägverzug und Schußfadendichte fast kontinuierlich zu messen. Die so im Meßgerät 30 ermittelten Werte werden den Steuergeräten 19 und 29 (Längszug und Schrägverzug) sowie dem Krumpf-Steuergerät 32 längs der gestrichelten Wirklinien derart zugeleitet, daß je ein entsprechender Regelkreis zum Einregeln vorgegebener Soll-Werte entsteht.In the measuring device 30, which is preferably designed as an optical detector with a digital camera, the fabric width, the skew and the weft density are determined. The device expenditure remains relatively low if the measuring device 30 is transverse to the transport direction 2 of the fabric web 1, e.g. can be traversed on a rail arranged transversely to the transport direction 3. With the measuring head moving back and forth in a correspondingly defined manner, it is possible in a relatively simple manner to measure the actual values of the width of the web, the draft and the weft density achieved in the hot flue 5 (from the first tensioning means 4 to the second tensioning means 14) almost continuously. The values thus determined in the measuring device 30 are fed to the control devices 19 and 29 (longitudinal pull and oblique warping) and to the shrink control device 32 along the dashed lines of action in such a way that a respective control circuit is created for adjusting predetermined target values.
Nach Fig. 1 wird das Meßgerät 30 der Krumpfanlage 31 vorgeschaltet. Alternativ kann das Meßgerät der Krumpfanlage nachgeschaltet werden. Als Beispiel wird ein solches Meßgerät 30', das vorzugsweise ebenso wie das Meßgerät 30 ausgebildet wird, in Fig. 1 gestrichelt dargestellt. Die zugehörigen Steuerleitungen - Verbindungen zu den Steuergeräten 19, 29 und 32 - werden durch gepunktete Wirklinien charakterisiert. In einer anderen bevorzugten Alternative wird das Meßgerät 30" sogar der ersten Ausrüstungsstufe, z.B. auch der Hotflue, vorgeschaltet. Der Verlust an falsch ausgerüsteter Stoffbahnmetrage kann dann sehr niedrig gehalten werden. Die der Position des Meßgeräts 30" zugeordneten Wirklinien werden strichpunktiert dargestellt.1, the measuring device 30 is connected upstream of the shrinking system 31. Alternatively, the measuring device can be connected downstream of the shrinking system. As an example, such a measuring device 30 ', which is preferably designed in the same way as the measuring device 30, is shown in broken lines in FIG. 1. The associated control lines - connections to control units 19, 29 and 32 - are characterized by dotted lines of action. In another preferred alternative, the measuring device 30 "is even connected upstream of the first stage of the equipment, for example also the hot flue. The loss of incorrectly equipped fabric web carrier can then be kept very low. The lines of action associated with the position of the measuring device 30" are shown in dash-dot lines.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
1 = Denim-Stoffbahn1 = Denim fabric
2 = Rolle2 = role
3 = Transportrichtung3 = direction of transport
4 = erstes Spannmittel4 = first clamping device
5 = Hotflue5 = hotflue
6 = Gehäuse (5)6 = housing (5)
7 = Einlaßschlitz (6)7 = inlet slot (6)
8 = Umlenkwalze8 = deflection roller
9 = Leitwalzenserie9 = guide roller series
11 = Leitwalze11 = guide roller
12 = Umlenkwalze12 = deflection roller
13 = Auslaufschlitz13 = outlet slot
14 = zweites Spannmittel14 = second clamping device
16 = Stoffbahnschleife16 = fabric loop
17 = Blasdüsen17 = blow nozzles
18 = mittlere Transportrichtung18 = medium direction of transport
19 = Längszug-Steuergerät19 = longitudinal pull control unit
21 = 1. Längsende (10)21 = 1st longitudinal end (10)
22 = Gelenklager (21)22 = spherical bearing (21)
23 = 2. Längsende (10)23 = 2nd longitudinal end (10)
24 = Balken24 = bars
25 = 1. Längsende (24)25 = 1st longitudinal end (24)
26 = Kipplager26 = tilting bearing
27 = 2. Längsende (24)27 = 2nd longitudinal end (24)
28 = Schrägstellgerät Schrägstell-Steuergerät ,30' = Meßgerät28 = tilt device Inclination control device, 30 '= measuring device
Krumpfanlageshrinking
Krumpf-SteuergerätKrumpf controller
Stauchmittelupsetting means
Spannungsreglervoltage regulators
Rolle role

Claims

Patentansprüche: claims:
1. Vorrichtung zum Ausrüsten einer Denim-Stoffbahn (1), welche - ausgehend von einer Rohware - auf vorgegebene Soll-Werte von Fertigbreite, Schrägverzug und Schußfadendichte zu bringen ist, mit einer Dehneinrichtung, z.B. Reckwerk oder Hotflue (5), welcher sowohl Streckmittel (4, 14) zum Langziehen der Stoffbahn (1) als auch Schrägstellmittel (28) zum Aufbringen eines Schrägverzugs zugeordnet sind, und mit einer im Kontinuebetrieb zugeordneten, insbesondere nachgeschalteten, Krumpfanlage (31) mit Stauchmitteln (33) zum Einstellen einer Schußfadendichte, gekennzeichnet durch ein einziges Meßgerät (30) zum Erfassen der Ist-Werte von Warenbreite, Schrägverzug und Schußfadendichte, welches in je einem Regelkreis in Steuerverbindung mit den Streck- und Schrägstellmitteln (4, 14; 28) der Dehneinrichtung (5) einerseits und den Stauchmitteln (33) der Krumpfanlage (31) andererseits zum Einregeln der jeweiligen Soll-Werte stehen.1.Device for equipping a denim fabric web (1), which - starting from a raw material - is to be brought to predetermined target values of finished width, bias and weft density, with an expansion device, e.g. Stretching device or hot flue (5), which is associated with both stretching means (4, 14) for elongating the fabric web (1) and inclined adjustment means (28) for applying an inclined draft, and with a shrinking system (31) assigned in continuous operation, in particular downstream Upsetting means (33) for setting a weft thread density, characterized by a single measuring device (30) for recording the actual values of fabric width, bias warp and weft thread density, which in each case in a control circuit in control connection with the drawing and biasing means (4, 14; 28) the stretching device (5) on the one hand and the upsetting means (33) of the shrinking system (31) on the other hand for adjusting the respective target values.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß das Meßgerät (30) der Stoffbahn (1) vor der ersten Ausrüstungsstufe, insbesondere vor der Dehneinrichtung (5), zugeordnet ist.2. Device according to claim 1, characterized in that the measuring device (30) of the fabric (1) before the first equipment stage, in particular before the stretching device (5), is assigned.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Meßgerät (30) zumindest der Dehneinrichtung (5) nachgeschaltet ist.3. Apparatus according to claim 1 or 2, characterized in that the measuring device (30) is connected at least to the expansion device (5).
4. Vorrichtung nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Meßgerät (30) der Dehneinrichtung (5) und der Krumpfanlage (31) nachgeschaltet ist.4. The device according to at least one of claims 1 to 3, characterized in that the measuring device (30) of the stretching device (5) and the shrinking system (31) is connected downstream.
5. Vorrichtung nach mindestens einem der Ansprüche 1 bis 4, gekennzeichnet durch einen optischen Detektor mit Digitalkamera als Meßgerät (30).5. The device according to at least one of claims 1 to 4, characterized by an optical detector with a digital camera as a measuring device (30).
6. Vorrichtung nach mindestens einem der Ansprüche 1 bis 4 mit einer Hotflue (5), in welcher die Stoffbahn (1) über eine untere und eine obere Serie (9) von Leitwalzen (11) in mäanderförmigen Schleifen auf- und abgeführt wird, dadu rch gekennzeichnet, daß eine der Walzenserien (9) einseitig auf einem Balken (24) gelagert ist und daß der Balken (24) an seinem ersten Längsende (25) in einem Kipplager (26) sowie am in der Bahntransportrichtung (3) nachfolgenden, zweiten Längsende (27) auf einem Hubgerät (28) zum geregelten Anheben oder Absenken des Balkenendes (27) ruht. 6. The device according to at least one of claims 1 to 4 with a hot flue (5), in which the fabric web (1) over a lower and an upper series (9) of guide rollers (11) in meandering loops up and out, dadu rch characterized in that one of the roller series (9) is supported on one side on a beam (24) and that the beam (24) at its first longitudinal end (25) in a tilting bearing (26) and at the second longitudinal end following in the web transport direction (3) (27) rests on a lifting device (28) for the controlled raising or lowering of the beam end (27).
EP03814448A 2002-12-20 2003-09-17 Device for finishing denim woven fabric Expired - Lifetime EP1573110B1 (en)

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DE10259868 2002-12-20
DE10259868 2002-12-20
DE10307914 2003-02-22
DE10307914A DE10307914A1 (en) 2002-12-20 2003-02-22 Device for finishing denim fabrics
PCT/DE2003/003078 WO2004061190A1 (en) 2002-12-20 2003-09-17 Device for finishing denim woven fabric

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BR0307734A (en) 2005-01-25
US20050122511A1 (en) 2005-06-09
AU2003275916A1 (en) 2004-07-29
WO2004061190A1 (en) 2004-07-22
KR20050083551A (en) 2005-08-26
ATE365826T1 (en) 2007-07-15
DE50307586D1 (en) 2007-08-09

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