EP3369851A1 - Device and method for processing an endless non-woven fabric - Google Patents
Device and method for processing an endless non-woven fabric Download PDFInfo
- Publication number
- EP3369851A1 EP3369851A1 EP18154397.6A EP18154397A EP3369851A1 EP 3369851 A1 EP3369851 A1 EP 3369851A1 EP 18154397 A EP18154397 A EP 18154397A EP 3369851 A1 EP3369851 A1 EP 3369851A1
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- EP
- European Patent Office
- Prior art keywords
- web
- suction
- sensor
- dryer
- width
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 title claims abstract description 9
- 239000004745 nonwoven fabric Substances 0.000 title abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000007711 solidification Methods 0.000 claims abstract description 6
- 230000008023 solidification Effects 0.000 claims abstract description 6
- 230000003287 optical effect Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
- D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
-
- 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
- D06B15/00—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours
- D06B15/04—Removing liquids, gases or vapours from textile materials in association with treatment of the materials by liquids, gases or vapours by suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/008—Controlling the moisture profile across the width of the material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/12—Drying solid materials or objects by processes not involving the application of heat by suction
-
- 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
- D06C29/00—Finishing or dressing, of textile fabrics, not provided for in the preceding groups
- D06C29/005—Finishing or dressing, of textile fabrics, not provided for in the preceding groups hydroentangling
Definitions
- the present invention relates to an apparatus and a method for processing an endless web according to claim 1.
- the water is sucked below the conveyor belt.
- the conveyor belt is designed as a permeable belt, or the web is guided over a suction slot.
- the object of the invention is the development of the device in which the suction of liquid is optimized.
- the object of the invention is also the improvement of an existing method for the extraction of liquid from a conveyor belt and / or from a nonwoven.
- the device according to the invention for processing an endless web, which is transported on at least one conveyor belt and solidified or treated with a liquid comprises a suction device arranged after the solidification or treatment under the conveyor belt for sucking off the liquid over the working width and a dryer arranged after the suction , with at least one sensor for detecting at least one lateral edge of the fleece, and with a controller which is designed to actuate by means of the sensor data actuators, with the size of a suction opening of the suction is adjustable.
- the invention includes the technical teaching that the quality of the fleece can be improved by a permanent detection of at least one lateral edge of the fleece, since the deviation of a reference variable, the size of the suction is adjusted, whereby the moisture removal over the working width continuous takes place, and at the same time a lot of energy can be saved.
- the suction opening By adapting the suction opening to the current working width of the fleece, the lateral flow of the suction air is reduced, whereby the edges of the fleece are less wavy.
- the invention is based on the recognition that a fleece is center-symmetrically conveyed over the conveyor belt and the width change is always noticeable at both edges.
- there are also systems in which the fleece is guided on a lateral system so that here too the monitoring of only one edge, which is opposite to the stop, is sufficient.
- both edges of the web are monitored by at least one sensor, since depending on the manufacturing process, an asymmetrical change in the width of the web is possible.
- the size of the suction opening can be changed by means of at least one automatically actuable insertion strip.
- the length of the suction opening is adapted to the current working width, so that a lateral empty flow is reduced.
- the suction opening can extend over the entire working width of the fleece plus an edge region.
- the suction opening can also extend only over an edge region of the fleece, in which case a separate suction opening is then provided for each edge region. In this case, the middle part of the web remains without suction because it rests on a conveyor belt.
- the at least one sensor is arranged at the inlet region of the dryer, upstream in the direction of suction and the downstream dryer can be adjusted via a single signal in the working width.
- the at least one sensor is arranged adjustably on a guide strip, wherein the guide strip extends at least partially over the working width of the nonwoven.
- the guide bar which is arranged at least partially over the working width of the fleece, the reference variable of the sensor can be adjusted via an easily adjustable setting range.
- a preferred embodiment provides to form the sensor as a line sensor or camera sensor or photosensor. Both the edge position, the center position or the width can be detected by the line sensor and evaluated in a controller.
- the camera sensor also enables evaluations of the fleece structure and surface.
- the dryer has an automatic width adjustment, with which the performance of the dryer is adjustable to the current width of the web.
- the subsequent width adjustment for example, the drying drum or the screen ceilings, allows adjustment of the fan power, with which the dryer can be operated in the energy optimum.
- a further preferred embodiment provides that an optical display indicates the current size of the suction opening.
- the nonwoven is transported by at least one conveyor belt and solidified or treated with a liquid, wherein after solidification or treatment, the liquid from the conveyor belt and / or from the nonwoven over the working width sucks and the nonwoven is subsequently dried, wherein permanently detected at least one lateral edge of the web and the size of a suction opening is adjustable to the current working width.
- both lateral edges of the web are monitored to align the width of the suction, if necessary, to an unbalanced position on the conveyor belt.
- the at least one lateral edge of the fleece is detected by means of at least one sensor, and in the case of a deviation from a reference variable, a signal is transmitted to a controller which actuates at least one actuator for adjusting the size of the suction opening.
- a controller which actuates at least one actuator for adjusting the size of the suction opening.
- the fact that the lateral edges of the fleece are detected after the suction and before the dryer, can be set with a signal at the same time both the working width of the suction as well as the working width of the dryer. Because the processing speed of the Fleece on the conveyor belt can be up to 500 m / min, the controlled system is relatively short by the arranged after the suction dryer.
- the working width of the dryer is adjustable, so that the fan power of the dryer to the working width or fleece width is customizable.
- the control is advantageously designed to actuate an upstream drafting device in the event of a deviation of the nonwoven width from a reference variable.
- the subsequent measuring device for determining the basis weight can be made simpler, since the control loop described here engages earlier.
- FIG. 1 shows a trained as a sieve belt circulating conveyor belt 1, which is guided by a plurality of guide rollers 3. At least one of the deflection rollers 3 is driven, so that a web, for example a nonwoven 2, is transported in the direction of the arrow.
- Nonwoven according to the invention is understood to mean a textile composite as a sheet of consolidated fibers.
- the suction opening 4a extends over the entire working width of the conveyor belt 1.
- the suction 4 is coupled to a fan 5, which generates a negative pressure.
- a liquid for example, from a previously arranged hydroentanglement or a padding, sucked from the conveyor belt 1 and partly from the web 2 and fed via lines 8, 8a to a separator 6 and to a filter or a water treatment 7.
- This embodiment can be reinforced according to the prior art with an above the conveyor belt 1 arranged blowing or printing device in the compressed air the Fluid through the fabric 2 and the conveyor belt 1 in the suction 4 presses.
- FIG. 2 shows the inlet region 12 of a dryer 10, of which the inlet roller 11 can be seen.
- the fleece 2 can enter below or above the inlet roller 11 into the dryer.
- the suction 4 is arranged in the transport direction of the web 2 in front of the dryer 10, so that the dryer power to be installed can be reduced by the suction 4 of the liquid. The more efficient the suction 4 operates, the lower the energy consumption of the dryer 10 can be operated.
- a permanent adaptation of the suction opening 4a to the current working width of the nonwoven 2 is useful because over a too wide suction false air is sucked in from the area next to the nonwoven edges, which on the one hand very much energy is consumed by an unnecessarily high fan power, on the other hand, the air flow Fleece edges dries differently to the middle of the fleece, so that the edges become wavy and uneven.
- At least one sensor permanently monitors at least one edge of the fleece.
- two sensors 14, 15 are arranged, which permanently detect both edges of the fleece 2 and transmit signals to a controller, which outputs a signal to an actuator for adjusting the length of the suction opening 4a in the event of a deviation from a reference variable.
- the setting can be carried out by an electric motor, hydraulically or pneumatically, by means of associated actuators, the length of the suction opening 4a is adjustable.
- slide-in strips are provided, which are arranged laterally on the suction openings 4a and on both sides can enlarge or reduce the suction slot 4a.
- the arrangement of the sensors 14, 15 may preferably take place at the inlet region 12 of the dryer 10, wherein the sensors 14, 15 are slidably mounted on a guide rail 13. Via the guide strip 13, the sensors 14, 15 can be adjusted to the working width or the desired width of the nonwoven fabric 2 to be processed, for example to a width of 2.5 m. This value is then stored in the controller as a reference variable.
- FIG. 3 shows an exhaust 4, which consists essentially of a round tube over which the conveyor belt, not shown here is performed.
- the suction 4 is attached to a support 16, which can accommodate further suction, not shown, or supports for the conveyor belt.
- a suction opening 4a is arranged, which is connected by means of fastening elements or welded connection with the suction 4.
- the suction opening 4a consists of a mounted on the pipe of the suction 4 frame construction, are arranged within the laterally displaceable slide-in strips 9.
- the width of the suction opening 4a which corresponds to the depth in this illustration, can be between 5 and 20 mm.
- the length of the suction opening 4a which corresponds to the working width in this illustration, can be between 500 mm and 5500 mm.
- the insertion strips 9 are designed to reduce the length of the suction opening 4a by means of a drive on both sides, for example from 3700 mm to 3000 mm.
- the suction 4 is fluidly connected by means of a line 8 on one side with a fan 5, which generates a negative pressure in the suction 4. If during the processing of the fleece its width changes, for example from 3500 mm to 3450 mm, the sensors 14, 15 detect the actual edge of the fleece and forward the signals to the control of the system.
- the suction 4 extends below the conveyor belt over the complete Working width.
- only the edge region of the fleece can be vacuumed by, for example, a separate suction is used for each fleece edge, which extends only over a partial width of the conveyor belt, for example, each 500 mm width at a total working width of 3500 mm.
- the automatic adjustment of the suction opening to the width of the web allows a constant water content in the web, whereby the web has a constant residual moisture when entering the dryer.
- This means that the dryer can also be operated in an energy-optimized manner, since the possible fluctuation range in the dryer output is reduced and the dryer can be operated closer to the optimum.
- the sensor signal is simultaneously used to adjust the working width of the subsequent dryer 10.
- the drying drum can also have a width adjustment arranged inside the drum with which the suction range of the fan can be set to the current working width. By adjusting the working width, the retrieved fan power of the dryer can be optimized and the dryer operated energy-optimized.
- an optical display for the operator is advantageous, so that the current size of the suction opening 4a is visually displayed. This can be done for example by a movable over the working width pointer, which is also controlled by the controller parallel to the adjustable slide-9.
- the monitoring of the edges of the web can also be used to detect a possible width jump in the web, which indicates a possible change in tension, which in turn has effects on the web weight and the nonwoven structure. Because with the Changing the nonwoven weight and the nonwoven structure can be a change in the MD / CD ratio, which has previously been determined only with very expensive and expensive measuring instruments. This effort can be inventively reduced with the further advantage that changes in the width of the fleece and the associated quality changes are detected earlier and can be intervened earlier accordingly.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zur Verarbeitung eines endlosen Vlieses, wobei das Vlies (2) auf mindestens einem Transportband (1) transportiert und mit einer Flüssigkeit verfestigt oder behandelt wird, umfassend eine nach der Verfestigung oder Behandlung unter dem Transportband (1) angeordneten Absaugung (4) zum Absaugen der Flüssigkeit über die Arbeitsbreite und einem nach der Absaugung (4) angeordnetem Trockner (10), mit mindestens einem Sensor zur Erfassung mindestens einer seitlichen Kante des Vlieses (2), und mit einer Steuerung, die mittels der Sensordaten Stellantriebe betätigen kann, mit der die Größe einer Absaugöffnung (4a) der Absaugung (4) einstellbar ist.The present invention relates to an apparatus and a method for processing an endless nonwoven fabric, wherein the nonwoven fabric (2) is transported on at least one conveyor belt (1) and solidified or treated with a liquid comprising, after solidification or treatment under the conveyor belt (1 ) arranged suction (4) for sucking the liquid over the working width and after the suction (4) arranged dryer (10), with at least one sensor for detecting at least one lateral edge of the web (2), and with a control by means of the sensor data actuate actuators, with the size of a suction opening (4a) of the suction (4) is adjustable.
Description
Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zur Verarbeitung eines endlosen Vlieses nach Anspruch 1.The present invention relates to an apparatus and a method for processing an endless web according to claim 1.
Bei der Verfestigung von einer endlosen Warenbahn mittels Wasserstrahlen wird unterhalb des Förderbandes das Wasser abgesaugt. Hierzu ist entweder das Förderband als durchlässiges Band ausgebildet, oder die Warenbahn wird über einen Absaugschlitz geführt.In the solidification of an endless web by means of water jets, the water is sucked below the conveyor belt. For this purpose, either the conveyor belt is designed as a permeable belt, or the web is guided over a suction slot.
Bei der
Aufgabe der Erfindung ist die Weiterbildung der Vorrichtung, bei der die Absaugung von Flüssigkeit optimiert wird. Aufgabe der Erfindung ist weiterhin die Verbesserung eines bestehenden Verfahrens zur Absaugung von Flüssigkeit von einem Transportband und/oder aus einem Vlies.The object of the invention is the development of the device in which the suction of liquid is optimized. The object of the invention is also the improvement of an existing method for the extraction of liquid from a conveyor belt and / or from a nonwoven.
Diese Aufgabe wird ausgehend von einer Vorrichtung nach Anspruch 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved on the basis of a device according to claim 1. Advantageous developments of the invention are specified in the dependent claims.
Die Aufgabe wird ebenfalls mit einem Verfahren nach dem Anspruch 9 gelöst.The object is also achieved by a method according to
Die erfindungsgemäße Vorrichtung zur Verarbeitung eines endlosen Vlieses, das auf mindestens einem Transportband transportiert und mit einer Flüssigkeit verfestigt oder behandelt wird, umfasst eine nach der Verfestigung oder Behandlung unter dem Transportband angeordnete Absaugung zum Absaugen der Flüssigkeit über die Arbeitsbreite und einem nach der Absaugung angeordnetem Trockner, mit mindestens einem Sensor zur Erfassung mindestens einer seitlichen Kante des Vlieses, und mit einer Steuerung, die ausgebildet ist mittels der Sensordaten Stellantriebe zu betätigen, mit der die Größe einer Absaugöffnung der Absaugung einstellbar ist.The device according to the invention for processing an endless web, which is transported on at least one conveyor belt and solidified or treated with a liquid, comprises a suction device arranged after the solidification or treatment under the conveyor belt for sucking off the liquid over the working width and a dryer arranged after the suction , with at least one sensor for detecting at least one lateral edge of the fleece, and with a controller which is designed to actuate by means of the sensor data actuators, with the size of a suction opening of the suction is adjustable.
Die Erfindung schließt die technische Lehre ein, dass durch eine permanente Erfassung mindestens einer seitlichen Kante des Vlieses die Qualität des Vlieses verbessert werden kann, da bei einer Abweichung von einer Führungsgröße die Größe der Absaugung eingestellt wird, wodurch der Feuchtigkeitsentzug über die Arbeitsbreite kontinuierlicher erfolgt, und gleichzeitig viel Energie eingespart werden kann. Durch die Anpassung der Absaugöffnung an die aktuelle Arbeitsbreite des Vlieses wird die seitliche Strömung der Saugluft reduziert, wodurch die Kanten des Vlieses weniger wellig werden. Dabei geht die Erfindung von der Erkenntnis aus, dass ein Vlies mittensymmetrisch über das Transportband gefördert wird und die Breitenänderung sich immer an beiden Kanten bemerkbar macht. Allerdings gibt es auch Anlagen, bei denen das Vlies an einer seitlichen Anlage geführt wird, so dass auch hier die Überwachung nur einer Kante, die dem Anschlag gegenüberliegt, ausreichend ist.The invention includes the technical teaching that the quality of the fleece can be improved by a permanent detection of at least one lateral edge of the fleece, since the deviation of a reference variable, the size of the suction is adjusted, whereby the moisture removal over the working width continuous takes place, and at the same time a lot of energy can be saved. By adapting the suction opening to the current working width of the fleece, the lateral flow of the suction air is reduced, whereby the edges of the fleece are less wavy. The invention is based on the recognition that a fleece is center-symmetrically conveyed over the conveyor belt and the width change is always noticeable at both edges. However, there are also systems in which the fleece is guided on a lateral system, so that here too the monitoring of only one edge, which is opposite to the stop, is sufficient.
Vorteilhafterweise werden beide Kanten des Vlieses durch mindestens einen Sensor überwacht, da je nach Herstellverfahren eine unsymmetrische Änderung der Breite des Vlieses möglich ist.Advantageously, both edges of the web are monitored by at least one sensor, since depending on the manufacturing process, an asymmetrical change in the width of the web is possible.
Vorteilhafterweise ist die Größe der Absaugöffnung mittels mindestens einer automatisch betätigbaren Einschubleiste veränderbar. Dabei wird die Länge der Absaugöffnung an die aktuelle Arbeitsbreite angepasst, so dass eine seitliche Leerströmung reduziert wird. Die Absaugöffnung kann sich über die gesamte Arbeitsbreite des Vlieses plus einem Randbereich erstrecken. Alternativ kann sich die Absaugöffnung aber auch nur über einen Randbereich des Vlieses erstrecken, wobei dann für jeden Randbereich eine separate Absaugöffnung vorgesehen ist. Dabei bleibt der Mittelteil des Vlieses ohne Absaugung, da er auf einem Transportband aufliegt.Advantageously, the size of the suction opening can be changed by means of at least one automatically actuable insertion strip. The length of the suction opening is adapted to the current working width, so that a lateral empty flow is reduced. The suction opening can extend over the entire working width of the fleece plus an edge region. Alternatively, however, the suction opening can also extend only over an edge region of the fleece, in which case a separate suction opening is then provided for each edge region. In this case, the middle part of the web remains without suction because it rests on a conveyor belt.
Dadurch, dass der mindestens eine Sensor am Einlaufbereich des Trockners angeordnet ist, kann die in Arbeitsrichtung vorgeordnete Absaugung und der nachgeordnete Trockner über ein einziges Signal in der Arbeitsbreite angepasst werden.Characterized in that the at least one sensor is arranged at the inlet region of the dryer, upstream in the direction of suction and the downstream dryer can be adjusted via a single signal in the working width.
Vorzugsweise ist der mindestens eine Sensor an einer Führungsleiste einstellbar angeordnet, wobei sich die Führungsleiste zumindest teilweise über die Arbeitsbreite des Vlieses erstreckt. Mittels der Führungsleiste, die zumindest teilweise über der Arbeitsbreite des Vlieses angeordnet ist, kann die Führungsgröße des Sensors über einen leicht einstellbaren Stellbereich eingestellt werden.Preferably, the at least one sensor is arranged adjustably on a guide strip, wherein the guide strip extends at least partially over the working width of the nonwoven. By means of the guide bar, which is arranged at least partially over the working width of the fleece, the reference variable of the sensor can be adjusted via an easily adjustable setting range.
Eine bevorzugte Ausführungsform sieht vor, den Sensor als Zeilensensor oder Kamerasensor oder Fotosensor auszubilden. Über den Zeilensensor kann sowohl die Kantenposition, die Mittenposition oder auch die Breite erfasst und in einer Steuerung ausgewertet werden. Der Kamerasensor ermöglicht hingegen auch Auswertungen der Vliesstruktur und Oberfläche.A preferred embodiment provides to form the sensor as a line sensor or camera sensor or photosensor. Both the edge position, the center position or the width can be detected by the line sensor and evaluated in a controller. By contrast, the camera sensor also enables evaluations of the fleece structure and surface.
Vorteilhafterweise weist der Trockner eine automatische Breiteneinstellung auf, mit der die Leistung des Trockners an die aktuelle Breite des Vlieses einstellbar ist. Dadurch, dass auch die vorgelagerte Absaugung an die aktuelle Breite des Vlieses angepasst wird, ergibt sich für die Warenbahn eine über die Breite konstante Restfeuchte, mit der der Trockner energieoptimierter betrieben werden kann. Die dann nachfolgende Breiteneinstellung, beispielsweise der Trocknertrommel oder der Siebdecken, ermöglicht eine Anpassung der Ventilatorleistung, mit der der Trockner im Energieoptimum betrieben werden kann.Advantageously, the dryer has an automatic width adjustment, with which the performance of the dryer is adjustable to the current width of the web. The fact that the upstream suction is adapted to the current width of the web, resulting in the web over the width constant residual moisture, with which the dryer can be operated energy-optimized. The subsequent width adjustment, for example, the drying drum or the screen ceilings, allows adjustment of the fan power, with which the dryer can be operated in the energy optimum.
Eine weitere bevorzugte Ausführungsform sieht vor, dass eine optische Anzeige die aktuelle Größe der Absaugöffnung anzeigt. Damit kann der Bediener der Anlage sehr schnell mögliche Fehler erkennen, beispielsweise, wenn bei der Inbetriebnahme der Anlage vergessen wurde, den oder die Sensoren auf die aktuelle Vliesbreite einzustellen. Unnötige Energieverschwendung kann damit vermieden werden.A further preferred embodiment provides that an optical display indicates the current size of the suction opening. Thus, the operator of the system can detect possible errors very quickly, for example, if it was forgotten during commissioning of the system to set the sensor or sensors on the current web width. Unnecessary waste of energy can thus be avoided.
Nach dem erfindungsgemäßen Verfahren zur Verarbeitung eines Vlieses nach Anspruch 9 wird das Vlies mittels mindestens eines Transportbandes transportiert und mit einer Flüssigkeit verfestigt oder behandelt, wobei nach der Verfestigung oder Behandlung die Flüssigkeit vom Transportband und/oder aus dem Vlies über die Arbeitsbreite absaugt und das Vlies nachfolgend getrocknet wird, wobei permanent mindestens eine seitliche Kante des Vlieses erfasst und die Größe einer Absaugöffnung an die aktuelle Arbeitsbreite einstellbar ist. Über die Anpassung der Größe der Absaugöffnung an die Breite des Vlieses kann die Restfeuchte über die Vliesbreite konstant gehalten werden, so dass der nachfolgende Trockner energieoptimierter betrieben werden kann. Dadurch, dass seitlich von der Vlieskante weniger Leerluft angesaugt wird, trocknet das Vlies gleichmäßiger und die Kanten werden nicht wellig.According to the inventive method for processing a nonwoven fabric according to
Vorzugsweise werden beide seitlichen Kanten des Vlieses überwacht um die Breite der Absaugung auch ggfs. an eine unsymmetrische Lage auf dem Transportband auszurichten.Preferably, both lateral edges of the web are monitored to align the width of the suction, if necessary, to an unbalanced position on the conveyor belt.
Vorzugsweise wird die mindestens eine seitliche Kante des Vlieses mittels mindestens eines Sensors erfasst werden, und bei einer Abweichung von einer Führungsgröße ein Signal an eine Steuerung übermittelt wird, die mindestens einen Stellantrieb zur Einstellung der Größe der Absaugöffnung betätigt. Die automatische Einstellbarkeit der Größe der Absaugöffnung an die jeweils aktuelle Vliesbreite ermöglicht eine höhere Qualität mit einem geringeren Energieverbrauch als nach dem Stand der Technik.Preferably, the at least one lateral edge of the fleece is detected by means of at least one sensor, and in the case of a deviation from a reference variable, a signal is transmitted to a controller which actuates at least one actuator for adjusting the size of the suction opening. The automatic adjustment of the size of the suction opening to the current fleece width allows a higher quality with a lower energy consumption than in the prior art.
Dadurch, dass die seitlichen Kanten des Vlieses nach der Absaugung und vor dem Trockner erfasst werden, kann mit einem Signal gleichzeitig sowohl die Arbeitsbreite der Absaugung wie auch die Arbeitsbreite des Trockners eingestellt werden. Da die Verarbeitungsgeschwindigkeit des Vlieses auf dem Transportband bis zu 500 m/min betragen kann, ist die Regelstrecke durch den nach der Absaugung angeordneten Trockner relativ kurz.The fact that the lateral edges of the fleece are detected after the suction and before the dryer, can be set with a signal at the same time both the working width of the suction as well as the working width of the dryer. Because the processing speed of the Fleece on the conveyor belt can be up to 500 m / min, the controlled system is relatively short by the arranged after the suction dryer.
Vorzugsweise ist auch die Arbeitsbreite des Trockners einstellbar, so dass auch die Ventilatorleistung des Trockners an die Arbeitsbreite bzw. Vliesbreite anpassbar ist.Preferably, the working width of the dryer is adjustable, so that the fan power of the dryer to the working width or fleece width is customizable.
Durch die permanente Überwachung der seitlichen Kanten des Vlieses kann ein möglicher Breitensprung erkannt werden, mit dem eine Änderung des Vliesgewichtes und der Vliesstruktur (MD/CD-Verhältnis) einhergeht. Vorteilhafterweise ist hierzu die Steuerung ausgebildet, bei Abweichung der Vliesbreite von einer Führungsgröße eine vorgelagerte Verzugseinrichtung zu betätigen. Damit kann die nachfolgende Messeinrichtung zur Bestimmung des Flächengewichtes einfacher ausgeführt werden, da der hier beschriebene Regelkreis früher eingreift.Due to the permanent monitoring of the lateral edges of the fleece, a possible jump in width can be recognized, which is accompanied by a change in the fleece weight and the fleece structure (MD / CD ratio). For this purpose, the control is advantageously designed to actuate an upstream drafting device in the event of a deviation of the nonwoven width from a reference variable. Thus, the subsequent measuring device for determining the basis weight can be made simpler, since the control loop described here engages earlier.
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher dargestellt. Es zeigen:
- Figur 1
- eine schematische Darstellung einer Absaugeinrichtung nach dem Stand der Technik
Figur 2- eine beispielhafte Anordnung der Sensoren an einem Trockner,
Figur 3- eine Schnittdarstellung durch eine Absaugung.
- FIG. 1
- a schematic representation of a suction device according to the prior art
- FIG. 2
- an exemplary arrangement of the sensors on a dryer,
- FIG. 3
- a sectional view through a suction.
Nach der dargestellten Ausführungsform ist vorgesehen, dass mindestens ein Sensor permanent mindestens eine Kante des Vlieses überwacht. In dem Ausführungsbeispiel der
Das Ausführungsbeispiel der
Die automatische Anpassung der Absaugöffnung an die Breite der Warenbahn ermöglicht einen konstanten Wassergehalt in der Warenbahn, wodurch die Warenbahn eine konstante Restfeuchte beim Einlauf in den Trockner aufweist. Damit kann auch der Trockner energieoptimierter betrieben werden, da die mögliche Schwankungsbreite in der Trocknerleistung reduziert wird und der Trockner näher am Optimum betrieben werden kann.The automatic adjustment of the suction opening to the width of the web allows a constant water content in the web, whereby the web has a constant residual moisture when entering the dryer. This means that the dryer can also be operated in an energy-optimized manner, since the possible fluctuation range in the dryer output is reduced and the dryer can be operated closer to the optimum.
Vorteilhafterweise wird das Sensorsignal gleichzeitig dazu verwendet, die Arbeitsbreite des nachfolgenden Trockners 10 einzustellen. Die Trocknertrommel kann ebenfalls eine innerhalb der Trommel angeordnete Breiteneinstellung aufweisen, mit der der Saugbereich des Ventilators auf die aktuelle Arbeitsbreite einstellbar ist. Über die Einstellung der Arbeitsbreite kann die abgerufene Ventilatorleistung des Trockners optimiert werden und der Trockner energieoptimiert betrieben werden.Advantageously, the sensor signal is simultaneously used to adjust the working width of the
Da die Absaugöffnung 4a durch das darüber transportierte Vlies 2 abgedeckt wird, ist eine optische Anzeige für den Bediener vorteilhaft, dem damit die aktuelle Größe der Absaugöffnung 4a visuell angezeigt wird. Dies kann beispielsweise durch einen über die Arbeitsbreite verschiebbaren Zeiger erfolgen, der parallel zu den einstellbaren Einschubleisten 9 ebenfalls durch die Steuerung ansteuerbar ist.Since the
Die Überwachung der Kanten des Vlieses kann weiterhin dazu genutzt werden, einen möglichen Breitensprung im Vlies zu detektieren, der auf eine mögliche Änderung der Anspannung hinweist, was wiederum Auswirkungen auf das Vliesgewicht und die Vliesstruktur hat. Denn mit der Änderung des Vliesgewichtes und der Vliesstruktur kann eine Änderung des MD/CD-Verhältnis erfolgen, das bisher nur mit sehr aufwändigen und teuren Messgeräten feststellbar ist. Dieser Aufwand lässt sich erfindungsgemäß reduzieren mit dem weiteren Vorteil, dass Änderungen der Vliesbreite und die damit verbundenen Qualitätsänderungen früher feststellbar sind und entsprechend früher eingegriffen werden kann.The monitoring of the edges of the web can also be used to detect a possible width jump in the web, which indicates a possible change in tension, which in turn has effects on the web weight and the nonwoven structure. Because with the Changing the nonwoven weight and the nonwoven structure can be a change in the MD / CD ratio, which has previously been determined only with very expensive and expensive measuring instruments. This effort can be inventively reduced with the further advantage that changes in the width of the fleece and the associated quality changes are detected earlier and can be intervened earlier accordingly.
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf das vorstehend angegebene bevorzugte Ausführungsbeispiel. Vielmehr ist eine Anzahl von Varianten denkbar, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch macht. Sämtliche aus den Ansprüchen, der Beschreibung oder den Zeichnungen hervorgehenden Merkmale und/oder Vorteile, einschließlich konstruktiver Einzelheiten oder räumlicher Anordnungen, können sowohl für sich als auch in den verschiedensten Kombinationen erfindungswesentlich sein.The invention is not limited in its execution to the above-mentioned preferred embodiment. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use. All of the claims, the description or the drawings resulting features and / or advantages, including structural details or spatial arrangements may be essential to the invention both in itself and in various combinations.
- 11
- Transportbandconveyor belt
- 22
- Vliesfleece
- 33
- Umlenkwalzedeflecting
- 44
- Absaugungsuction
- 4a4a
- Absaugöffnungsuction
- 55
- Ventilatorfan
- 66
- Abscheiderseparators
- 77
- Wasseraufbereitungwater treatment
- 8,8a8,8a
- Leitungmanagement
- 99
- Einschubleisteinsertion strip
- 1010
- Trocknerdryer
- 1111
- Einlaufwalzeinlet roller
- 1212
- Einlaufbereichinlet region
- 1313
- Führungsleisteguide rail
- 1414
- Sensorsensor
- 1515
- Sensorsensor
- 1616
- Trägercarrier
Claims (15)
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DE102017104497.3A DE102017104497A1 (en) | 2017-03-03 | 2017-03-03 | Apparatus and method for processing an endless web |
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EP3369851A1 true EP3369851A1 (en) | 2018-09-05 |
EP3369851B1 EP3369851B1 (en) | 2020-01-29 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111979674A (en) * | 2019-05-21 | 2020-11-24 | 江苏博森机械制造有限公司 | Vacuum dehydration device |
CN112813623A (en) * | 2021-02-01 | 2021-05-18 | 湖南先森智能科技有限公司 | Mist pumping device for public fixed recycling machine |
Families Citing this family (1)
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DE202019100745U1 (en) | 2019-02-08 | 2020-05-11 | Autefa Solutions Germany Gmbh | Drying facility |
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DE10018945A1 (en) * | 1999-07-24 | 2001-01-25 | Voith Paper Patent Gmbh | Press section at a papermaking or paper finishing machine has a single press gap formed by two rollers for efficient water extraction in a small assembly without costly shoe press rollers |
DE10042243A1 (en) * | 2000-08-28 | 2002-03-14 | Voith Paper Patent Gmbh | Web break monitoring method |
DE102008044849A1 (en) | 2008-08-28 | 2010-03-04 | Fleissner Gmbh | Web textile material e.g. knitted fabric, dehydrating device, has suction unit that is attached to blower device which is arranged on opposite side of material web, where material web is guidable by suction unit |
US20160251780A1 (en) * | 2013-10-18 | 2016-09-01 | Unicharm Corporation | Bulkiness recovery apparatus and bulkiness recovery method for nonwoven fabric |
DE202015009116U1 (en) * | 2015-10-16 | 2016-10-24 | Voith Patent Gmbh | Vacuum control |
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2017
- 2017-03-03 DE DE102017104497.3A patent/DE102017104497A1/en not_active Withdrawn
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DE10018945A1 (en) * | 1999-07-24 | 2001-01-25 | Voith Paper Patent Gmbh | Press section at a papermaking or paper finishing machine has a single press gap formed by two rollers for efficient water extraction in a small assembly without costly shoe press rollers |
DE10042243A1 (en) * | 2000-08-28 | 2002-03-14 | Voith Paper Patent Gmbh | Web break monitoring method |
DE102008044849A1 (en) | 2008-08-28 | 2010-03-04 | Fleissner Gmbh | Web textile material e.g. knitted fabric, dehydrating device, has suction unit that is attached to blower device which is arranged on opposite side of material web, where material web is guidable by suction unit |
US20160251780A1 (en) * | 2013-10-18 | 2016-09-01 | Unicharm Corporation | Bulkiness recovery apparatus and bulkiness recovery method for nonwoven fabric |
DE202015009116U1 (en) * | 2015-10-16 | 2016-10-24 | Voith Patent Gmbh | Vacuum control |
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CN111979674A (en) * | 2019-05-21 | 2020-11-24 | 江苏博森机械制造有限公司 | Vacuum dehydration device |
CN112813623A (en) * | 2021-02-01 | 2021-05-18 | 湖南先森智能科技有限公司 | Mist pumping device for public fixed recycling machine |
Also Published As
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DE102017104497A1 (en) | 2018-09-06 |
EP3369851B1 (en) | 2020-01-29 |
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