EP2539498A1 - Device for solidifying a material web - Google Patents

Device for solidifying a material web

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Publication number
EP2539498A1
EP2539498A1 EP11711252A EP11711252A EP2539498A1 EP 2539498 A1 EP2539498 A1 EP 2539498A1 EP 11711252 A EP11711252 A EP 11711252A EP 11711252 A EP11711252 A EP 11711252A EP 2539498 A1 EP2539498 A1 EP 2539498A1
Authority
EP
European Patent Office
Prior art keywords
web
material web
suction
fluid
marked
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
EP11711252A
Other languages
German (de)
French (fr)
Other versions
EP2539498B1 (en
Inventor
Willi Liebscher
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.)
Truetzschler Nonwovens and Man Made Fibers GmbH
Original Assignee
Truetzschler Nonwovens GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Truetzschler Nonwovens GmbH filed Critical Truetzschler Nonwovens GmbH
Priority to PL11711252T priority Critical patent/PL2539498T3/en
Publication of EP2539498A1 publication Critical patent/EP2539498A1/en
Application granted granted Critical
Publication of EP2539498B1 publication Critical patent/EP2539498B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a device for solidifying a material web according to the preamble of claim 1.
  • EP-A-0 959 076 discloses a device for consolidating the fibers of a material web of natural and / or artificial fibers of any type, in which a belt drum compacting of the fiber web takes place. It consists of the following characteristics or is designed as follows:
  • a first endless belt supporting the fiber web which is tensioned between at least two rollers and deflected
  • a second belt also tensioned between at least two rollers, which is connected to the first endless belt and whose workstring lies opposite the workstring of the first endless belt in the same direction as that of the first endless belt;
  • the two working strands of the two endless belts are directed conically toward one another in their longitudinal extent, so that the fiber web lying on the working strand of the first endless belt (the pre-fleece, the pile) is increasingly compressed between the leading endless belts,
  • the device of this type has the advantage that the pre-fleece, the voluminous leading fiber web, between the two endless belts is slowly increasing and compressed with uniform pressure from above and below without shearing and only if they see between the two endless belts is recorded, is wetted on the Vernade- drum.
  • the construction is complex and therefore too expensive for some products.
  • a first endless belt supporting the fiber web which is tensioned between at least two rollers and deflected
  • a second endless belt also guided stretched between at least two rollers, which rotates the Hästrum of the first endless belt opposite lying Hätrum in the same direction as that of the first endless belt,
  • the two working strands of the two endless belts are conically directed toward one another at the inlet in their longitudinal extension, so that the fiber web lying on the working strand of the first endless belt is increasingly compressed between the leading endless belts,
  • Nozzle bar with a suction for netting the fiber web is provided.
  • DE 10 2005 055 939 B3 shows a nozzle beam for producing fluid jets, which serve to solidify a fiber web.
  • the Nozzle strip contains a replaceable nozzle strip, which contains the outlet openings for the fluid.
  • the outlet openings may be arranged in a row, but also in two or more rows parallel to each other.
  • the outlet openings have a distance from each other and diameter, which depend on the purpose.
  • pressurized water but in principle also superheated steam can be used.
  • the object of the present invention is to propose a simple device for compressing and first applying a Flores consisting of fibers and / or filaments.
  • the invention is based on a device for solidifying a material web formed from fibers and / or filaments, comprising a wire belt carrying the material web, a nozzle beam arranged above the wire belt for impinging the material web with a pressurized fluid in the form of a plurality arranged in at least one row of fluid jets, arranged below the screen belt and cooperating with the nozzle beam suction with a suction, wherein in the area of the Absaugspaltes the fluid jets hit the web.
  • the fluid is applied in the rear region of the suction gap in the conveying direction of the material web.
  • the material web, the fiber and / or filament web experiences no mechanical compaction, compaction or guidance until fluid is applied.
  • the fluid jets In the case of an enlarged suction area, the fiber and / or filament pile is stabilized and also slightly compacted, depending on the absorption capacity.
  • the invention avoids that the fiber and / or filament web which is moved in the direction of fluid application is upset by the fluid jets or wrinkles form on the surface thereof. Disturbances in the fleece quality are thus avoided.
  • the suction is designed as a connected to a vacuum cleaner chamber, which is bounded in the transport direction of the web by a respective plastic existing bar.
  • the blowing device has air guide elements.
  • the air guide elements of the blowing device are adjustable. The compacting effect of the blowing air can thus be adjusted depending on the prevailing conditions.
  • the pile of the material web in the conveying direction is different strong acted upon with blown air.
  • an air flow with a predetermined strength and direction is blown directly into the area of the suction gap.
  • a second air flow with different strength and / or direction acted upon in the area in front of the suction gap the material web and stabilizes this already before it is flowed through above the Absaugspaltes of air.
  • the web carrying the web is running straight stretched, the Absaugspalt is located directly below the screen belt.
  • the web carrying the web passes around a needling drum with a permeable surface, wherein the suction gap in the interior of the needling drum cooperates with the underside of the permeable surface.
  • a conveyor belt S which is rectilinearly stretched around guide rollers, not shown, carries a material web F which consists of fibers and / or filaments and which is provided as un-sealed pile by a carding or spunbonding installation largely un-solidified and transported in the direction of the arrow ,
  • a nozzle beam D extending over the width of the material web F is arranged, on the underside of which a multiplicity of outlet openings for a fluid under pressure are arranged.
  • it is high-pressure water, according to the pile of the material web F with a plurality of water jets W is applied.
  • a row outlet openings for the water jets W are in a, not shown, replaceable nozzle strip. It is also possible to use a nozzle strip with outlet openings arranged in a plurality of spaced-apart rows.
  • an extraction A is arranged below the material web F carrying conveyor belt S, which is connected via a line system with a separator AS together with downstream Saugventilator SV.
  • the separator AS the water is separated from the water-air mixture, conveyed away via the downstream suction pump SP and fed to a water treatment, not shown.
  • the suction A is a over the width of the conveyor belt S extending chamber which is limited in the transport direction of the web F of two made of plastic strips L1 and L2.
  • the web F of the formed by the strips L1, L2 Absaugspalt is closed.
  • the representation of the strips L1, L2, the nozzle beam D and in particular the size ratios of the components is shown purely in principle in the figure.
  • the suction gap formed by the strips L1, L2 has a width b.
  • the nozzle beam D with its exiting at the bottom water jets W is offset in the transport direction of the web F towards the rear of the Absaugspaltes, such that the water jets W not centrally but closer to the rear strip L2 Absaugspaltes in this or the web F enter.
  • the distance of the entrance of the water jets W from the rear rail L2 is indicated by c, and from the front rail L1 by a.
  • the material web F in the front region experiences a greater throughput than in the rear region (distance b to the strip L2).
  • This volumetrically stronger absorption of the material web F in the front region stabilizes the pile, which accumulates on the water jets W and thereby experiences a compressive force against the transport direction.
  • the stronger absorption of the Flores before the water jets W avoids bulging of the Flores before the first solidification by the water jets W.
  • a blowing device is arranged in the conveying direction of the material web F in front of the nozzle beam D, is blown by means of the air in the area a of the suction on the surface of the web.
  • the material web F to be consolidated consisted of a spunbonded nonwoven made of polypropylene (PP) with a denier of 1.8 denier.
  • the spunbonded fabric was only lightly calendered after laying and then acted upon hydrodynamically according to the invention.
  • the water pressure in the first nozzle bar D was 80 bar, the suction was applied with 120 mbar vacuum.
  • the suction gap had a width b of 12 mm, the water jets W had a distance a of 10 mm from the front strip L1 of the suction gap.
  • the first hydrodynamic needling without compaction could be carried out with a noticeably lower pressure, which additionally reduced the risk of bulking of the flores.
  • a significantly more homogeneous nonwoven fabric could be produced without interference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The invention relates to a device for solidifying a material web (F) formed of fibres and/or filaments, said device comprising a screen belt (S) carrying the material web (F), a nozzle beam (D) arranged above the screen belt (S) for subjecting the material web (F) to a pressurized fluid with a plurality of fluid jets (W) arranged in at least one row, and a suction device which is disposed below the screen belt (S), interacts with the nozzle beam (D) and has a suction gap (A). The invention is characterized in that the fluid jets (W) hit the material web (F) in the surface section of the suction gap (A). According to the invention, the fluid application (W) is carried out in the rear section of the suction gap (A) when seen in the conveying direction of the material web (F).

Description

Vorrichtung zum Verfestigen einer Materialbahn  Device for solidifying a material web
Die Erfindung betrifft eine Vorrichtung zum Verfestigen einer Material- bahn nach dem Oberbegriff von Anspruch 1. The invention relates to a device for solidifying a material web according to the preamble of claim 1.
Aus der EP-A-0 959 076 ist eine Vorrichtung zum Verfestigen der Fasern einer Materialbahn aus natürlichen und/oder künstlichen Fasern jeglicher Art bekannt, bei der eine Band-Trommel-Kompaktierung der Faserbahn erfolgt. Sie besteht aus den folgenden Merkmalen bzw. ist wie folgt angegeben gestaltet: EP-A-0 959 076 discloses a device for consolidating the fibers of a material web of natural and / or artificial fibers of any type, in which a belt drum compacting of the fiber web takes place. It consists of the following characteristics or is designed as follows:
- ein die Faserbahn unterstützendes erstes Endlosband, das zwischen mindestens zwei Walzen gespannt geführt und umgelenkt ist, a first endless belt supporting the fiber web, which is tensioned between at least two rollers and deflected,
- eine durchlässige Vemadelungstrommel, die von dem Endlosband umschlungen ist, a permeable needling drum wrapped in the endless band,
- ein dem ersten Endlosband zugeordnetes zweites, ebenfalls zwischen mindestens zwei Walzen gespannt geführtes Endlosband, dessen dem Arbeitstrum des ersten Endlosbandes gegenüber liegendes Arbeitstrum in der gleichen Richtung angetrieben umläuft wie das des ersten Endlosbandes,  a second belt, also tensioned between at least two rollers, which is connected to the first endless belt and whose workstring lies opposite the workstring of the first endless belt in the same direction as that of the first endless belt;
- die beiden Arbeitstrums der beiden Endlosbänder sind in ihrer Längserstreckung am Einlauf konisch aufeinander zu gerichtet, so dass die auf dem Arbeitstrum des ersten Endlosbandes liegende Faserbahn (das Vorvlies, der Flor) zwischen den vorlaufenden Endlosbändern zunehmend verdichtet wird,  the two working strands of the two endless belts are directed conically toward one another in their longitudinal extent, so that the fiber web lying on the working strand of the first endless belt (the pre-fleece, the pile) is increasingly compressed between the leading endless belts,
- die beiden Endlosbänder werden von zwei Walzen gegen die Vemadelungstrommel zur stärkeren Umschlingung der Trommel gedrückt, - The two endless belts are pressed by two rollers against the Vemadelungstrommel for stronger wrapping of the drum,
- zwischen diesen beiden Walzen ist ein Düsenbalken zur Netzung der Faserbahn gegen diese gerichtet. Die Vorrichtung dieser Art hat den Vorteil, dass das Vorvlies, die voluminös vorlaufende Faserbahn, zwischen den beiden Endlosbändern langsam zunehmend und mit gleichmäßigem Druck von oben und unten ohne Scherbeanspruchung verdichtet wird und erst dann, wenn sie zwi- sehen den beiden Endlosbändern festgehalten ist, an der Vernade- lungstrommel genetzt wird. Die Konstruktion ist aber aufwendig und daher für manche Produkte zu teuer. - Between these two rollers, a nozzle bar for meshing the fiber web is directed against this. The device of this type has the advantage that the pre-fleece, the voluminous leading fiber web, between the two endless belts is slowly increasing and compressed with uniform pressure from above and below without shearing and only if they see between the two endless belts is recorded, is wetted on the Vernade- drum. The construction is complex and therefore too expensive for some products.
Aus der EP 1 126 064 B1 ist eine Vorrichtung bekannt, welche die Kom- paktierung sowie das erste Netzen des Vlies vereinfacht. Diese bekannte Vorrichtung sieht eine Band-Band-Kompaktierung vor und besteht aus den folgenden Merkmalen bzw. ist wie folgt angegeben gestaltet: From EP 1 126 064 B1, a device is known which simplifies the compacting as well as the first netting of the nonwoven. This known device provides a band-band compaction and consists of the following features or is designed as follows:
- ein die Faserbahn unterstützendes erstes Endlosband, das zwischen mindestens zwei Walzen gespannt geführt und umgelenkt ist, a first endless belt supporting the fiber web, which is tensioned between at least two rollers and deflected,
- ein zweites Endlosband, ebenfalls zwischen mindestens zwei Walzen gespannt geführt, dessen dem Arbeitstrum des ersten Endlosbandes gegenüber liegendes Arbeitstrum in der gleichen Richtung angetrieben umläuft wie das des ersten Endlosbandes,  - A second endless belt, also guided stretched between at least two rollers, which rotates the Arbeitsstrum of the first endless belt opposite lying Arbeitstrum in the same direction as that of the first endless belt,
- die beiden Arbeitstrums der beiden Endlosbänder sind am Einlauf in ihrer Längserstreckung konisch aufeinander zu gerichtet, so dass die auf dem Arbeitstrum des ersten Endlosbandes liegende Faserbahn zwischen den vorlaufenden Endlosbändern zunehmend verdichtet wird,the two working strands of the two endless belts are conically directed toward one another at the inlet in their longitudinal extension, so that the fiber web lying on the working strand of the first endless belt is increasingly compressed between the leading endless belts,
- in einem nicht von einer Umlenkwalze unterstützten Bereich ein den beiden miteinander umlaufenden Endlosbändern zugeordneter erster- In a not supported by a guide roller area a the two mutually encircling endless belts associated first
Düsenbalken mit einer Absaugung zum Netzen der Faserbahn. Nozzle bar with a suction for netting the fiber web.
Auch diese Konstruktion ist auf Grund des Aufwandes für manche Produkte zu kostenintensiv. This design is too costly due to the expense of some products.
Die DE 10 2005 055 939 B3 zeigt einen Düsenbalken zur Erzeugung von Fluidstrahlen, welche der Verfestigung einer Faserbahn dienen. Der Düsenstreifen enthält einen auswechselbaren Düsenstreifen, der die Austrittsöffnungen für das Fluid enthält. Die Austrittsöffnungen können in einer Reihe, aber auch in zwei oder mehreren Reihen parallel zueinander angeordnet sein. Die Austrittsöffnungen haben einen Abstand zueinander sowie Durchmesser, welche sich nach dem Einsatzzweck richten. Als Fluid kann unter Druck stehendes Wasser aber grundsätzlich auch überhitzter Dampf verwendet werden. DE 10 2005 055 939 B3 shows a nozzle beam for producing fluid jets, which serve to solidify a fiber web. Of the Nozzle strip contains a replaceable nozzle strip, which contains the outlet openings for the fluid. The outlet openings may be arranged in a row, but also in two or more rows parallel to each other. The outlet openings have a distance from each other and diameter, which depend on the purpose. As a fluid, pressurized water but in principle also superheated steam can be used.
Aufgabe der vorliegenden Erfindung ist es, eine einfache Vorrichtung zum Verdichten und ersten Beaufschlagen eines aus Fasern und/oder Filamenten bestehenden Flores vorzuschlagen. The object of the present invention is to propose a simple device for compressing and first applying a Flores consisting of fibers and / or filaments.
Gelöst wird diese Aufgabe durch die Merkmale des Vorrichtungsanspruches. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen. This problem is solved by the features of the device claim. Advantageous developments of the invention will become apparent from the dependent claims.
Die Erfindung geht aus von einer Vorrichtung zum Verfestigen einer aus Fasern und/oder Filamenten gebildeten Materialbahn, bestehend aus einem die Materialbahn tragenden Siebband, einem oberhalb des Sieb- bandes angeordneten Düsenbalken zur Beaufschlagung der Materialbahn mit einem unter Druck stehendem Fluid in Form von einer Vielzahl von in wenigstens einer Reihe angeordneten Fluidstrahlen, einer unterhalb des Siebbandes angeordneten und mit dem Düsenbalken zusammenwirkenden Absaugung mit einem Absaugspalt, wobei im Flächen- bereich des Absaugspaltes die Fluidstrahlen auf die Materialbahn treffen. The invention is based on a device for solidifying a material web formed from fibers and / or filaments, comprising a wire belt carrying the material web, a nozzle beam arranged above the wire belt for impinging the material web with a pressurized fluid in the form of a plurality arranged in at least one row of fluid jets, arranged below the screen belt and cooperating with the nozzle beam suction with a suction, wherein in the area of the Absaugspaltes the fluid jets hit the web.
Gemäß der Erfindung ist vorgesehen, dass die Fluidbeaufschlagung in dem in Förderrichtung der Materialbahn hinteren Bereich des Absaug- spaltes erfolgt. Die Materialbahn, der Faser- und/oder Filamentflor, erfährt bis zur Fluidbeaufschlagung keinerlei mechanische Kompaktie- rung, Verdichtung oder Führung. Durch den den Fluidstrahlen vorge- ordneten vergrößerten Durchsaugbereich wird der Faser- und/oder Fi- lamentflor stabilisiert und auch - in Abhängigkeit der Durchsaugungs- stärke - leicht verdichtet. Weiterhin vermeidet die Erfindung, dass der in Richtung Fluidbeaufschlagung bewegte Faser- und/oder Filamentflor durch die Fluidstrahlen aufgestaucht wird bzw. sich an dessen Oberfläche Falten bilden. Störungen in der Vliesqualität werden so vermieden. According to the invention, it is provided that the fluid is applied in the rear region of the suction gap in the conveying direction of the material web. The material web, the fiber and / or filament web, experiences no mechanical compaction, compaction or guidance until fluid is applied. By virtue of the fluid jets In the case of an enlarged suction area, the fiber and / or filament pile is stabilized and also slightly compacted, depending on the absorption capacity. Furthermore, the invention avoids that the fiber and / or filament web which is moved in the direction of fluid application is upset by the fluid jets or wrinkles form on the surface thereof. Disturbances in the fleece quality are thus avoided.
Weiterbildend ist vorgesehen: - die Fluidbeaufschlagung erfolgt im hinteren Viertel des Absaugspaltes. Further education is provided: - The fluid is applied in the rear quarter of Absaugspaltes.
- oberhalb der durch das Siebband getragenen Materialbahn ist der Absaugung eine Blasvorrichtung zugeordnet, durch die Luft auf die Oberfläche der Materialbahn geblasen wird. Hierdurch wird die kompaktie- rende, stabilisierende Wirkung der durch den Flor der Materialbahn strömenden Luft verstärkt. - Above the carried by the wire web of material suction is associated with a blowing device, is blown through the air to the surface of the web. As a result, the compacting, stabilizing effect of the air flowing through the pile of the material web is enhanced.
- die Absaugung ist als eine mit einem Sauglufterzeuger verbundener Kammer ausgebildet, die in Transportrichtung der Materialbahn von je einer aus Kunststoff bestehenden Leiste begrenzt wird. - The suction is designed as a connected to a vacuum cleaner chamber, which is bounded in the transport direction of the web by a respective plastic existing bar.
- die Blasvorrichtung weist Luftleitelemente auf. - The blowing device has air guide elements.
- die Luftleitelemente der Blasvorrichtung sind einstellbar. Die die Kom- paktierung unterstützende Wirkung der Blasluft kann so in Abhängigkeit der vorliegenden Bedingungen eingestellt werden. - The air guide elements of the blowing device are adjustable. The compacting effect of the blowing air can thus be adjusted depending on the prevailing conditions.
- durch die Blasvorrichtung ist der Flor der Materialbahn in Förderichtung unterschiedlich stark mit Blasluft beaufschlagbar. So ist es mög- lieh, dass ein Luftstrom mit einer vorgegebenen Stärke und Richtung direkt in den Bereich des Absaugspalt geblasen wird. Ein zweiter Luftstrom mit dazu unterschiedlicher Stärke und/oder Richtung beaufschlagt im Bereich vor dem Absaugspalt die Materialbahn und stabilisiert diese bereits bevor sie oberhalb des Absaugspaltes von Luft durchströmt wird. - das die Materialbahn tragende Siebband läuft geradlinig gespannt, wobei der Absaugspalt direkt unterhalb des Siebbandes angeordnet ist. - By the blowing device, the pile of the material web in the conveying direction is different strong acted upon with blown air. Thus, it is possible that an air flow with a predetermined strength and direction is blown directly into the area of the suction gap. A second air flow with different strength and / or direction acted upon in the area in front of the suction gap, the material web and stabilizes this already before it is flowed through above the Absaugspaltes of air. - The web carrying the web is running straight stretched, the Absaugspalt is located directly below the screen belt.
- das die Materialbahn tragende Siebband läuft um eine Vernadelungstrommel mit einer durchlässigen Oberfläche, wobei der Absaugspalt im Inneren der Vernadelungstrommel mit der Unterseite der durchlässigen Oberfläche zusammenwirkt. - The web carrying the web passes around a needling drum with a permeable surface, wherein the suction gap in the interior of the needling drum cooperates with the underside of the permeable surface.
Des Weiteren erfolgt die Erläuterung eines Ausführungsbeispieles der Erfindung an Hand der Zeichnung. Furthermore, the explanation of an embodiment of the invention with reference to the drawing.
Ein um nicht dargestellte Umlenkwalzen geradlinig gespanntes, endloses, als Siebband ausgebildetes Transportband S trägt eine aus Fasern und/oder Filamenten bestehende Materialbahn F, welche als unverdich- teter Flor von einer Krempel oder Spinnvliesanlage weitestgehend un- verfestigt bereitgestellt und in Richtung des Pfeils transportiert wird. Oberhalb des Transportbandes S mit der Materialbahn F ist ein sich über die Breite der Materialbahn F erstreckender Düsenbalken D angeordnet, an dessen Unterseite eine Vielzahl von Austrittsöffnungen für ein unter Druck stehendes Fluid. Im Ausführungsbeispiel handelt es sich um unter hohem Druck stehendes Wasser, entsprechend wird der Flor der Materialbahn F mit einer Vielzahl von Wasserstrahlen W beaufschlagt. Die in einer Reihe angeordneten Austrittsöffnungen für die Wasserstrahlen W befinden sich in einem nicht dargestellten, auswechselbaren Düsenstreifen. Auch ist möglich, einen Düsenstreifen mit in mehreren voneinander beabstandeten Reihen angeordneten Austrittsöffnungen zu verwenden. Unterhalb des die Materialbahn F tragenden Transportbandes S ist eine Absaugung A angeordnet, welche über ein Leitungssystem mit einem Abscheider AS nebst nachgeordnetem Saugventilator SV verbunden ist. In dem Abscheider AS wird das Wasser aus dem Wasser-Luft-Gemisch abgetrennt, über die nachgeschaltete Saugpumpe SP abgefördert und einer nicht dargestellten Wasseraufbereitung zugeführt. A conveyor belt S which is rectilinearly stretched around guide rollers, not shown, carries a material web F which consists of fibers and / or filaments and which is provided as un-sealed pile by a carding or spunbonding installation largely un-solidified and transported in the direction of the arrow , Above the conveyor belt S with the material web F, a nozzle beam D extending over the width of the material web F is arranged, on the underside of which a multiplicity of outlet openings for a fluid under pressure are arranged. In the embodiment, it is high-pressure water, according to the pile of the material web F with a plurality of water jets W is applied. The arranged in a row outlet openings for the water jets W are in a, not shown, replaceable nozzle strip. It is also possible to use a nozzle strip with outlet openings arranged in a plurality of spaced-apart rows. Below the material web F carrying conveyor belt S, an extraction A is arranged, which is connected via a line system with a separator AS together with downstream Saugventilator SV. In the separator AS, the water is separated from the water-air mixture, conveyed away via the downstream suction pump SP and fed to a water treatment, not shown.
Die Absaugung A ist eine sich über die Breite des Transportbandes S erstreckende Kammer, welche in Transportrichtung der Materialbahn F von zwei aus Kunststoff gefertigte Leisten L1 und L2 begrenzt wird. An den Formaträndern der Materialbahn F ist der durch die Leisten L1 , L2 gebildete Absaugspalt geschlossen. Die Darstellung der Leisten L1 , L2, des Düsenbalkens D und insbesondere die Größenverhältnisse der Bauteile ist in der Figur rein prinzipiell wiedergegeben. The suction A is a over the width of the conveyor belt S extending chamber which is limited in the transport direction of the web F of two made of plastic strips L1 and L2. At the Formaträndern the web F of the formed by the strips L1, L2 Absaugspalt is closed. The representation of the strips L1, L2, the nozzle beam D and in particular the size ratios of the components is shown purely in principle in the figure.
Gemäß Figur 1 weist der durch die Leisten L1 , L2 gebildete Absaugspalt eine Breite b auf. Der Düsenbalken D mit seinen an der Unterseite austretenden Wasserstrahlen W ist in Transportrichtung der Materialbahn F in Richtung des hinteren Bereiches des Absaugspaltes versetzt, derart, dass die Wasserstrahlen W nicht mittig sondern näher an der hinteren Leiste L2 des Absaugspaltes in diesen bzw. die Materialbahn F eintreten. In der Figur ist der Abstand des Eintrittes der Wasserstrahlen W von der hinteren Leiste L2 mit c, von der vorderen Leiste L1 mit a gekennzeichnet. Erfindungsgemäß ist c < a gewählt, wobei b = a + c. According to FIG. 1, the suction gap formed by the strips L1, L2 has a width b. The nozzle beam D with its exiting at the bottom water jets W is offset in the transport direction of the web F towards the rear of the Absaugspaltes, such that the water jets W not centrally but closer to the rear strip L2 Absaugspaltes in this or the web F enter. In the figure, the distance of the entrance of the water jets W from the rear rail L2 is indicated by c, and from the front rail L1 by a. According to the invention, c <a is chosen, where b = a + c.
Durch die asymmetrische Ausrichtung der Wasserstrahlen gegenüber dem Absaugspalt (die Leisten L1 , L2) erfährt die Materialbahn F im vorderen Bereich (Abstand a zur Leiste L1) eine stärkere Durchsaugung als im hinteren Bereich (Abstand b zur Leiste L2). Diese volumenmäßig stärkere Durchsaugung der Materialbahn F im vorderen Bereich (a) stabilisiert den Flor, der auf die Wasserstrahlen W aufläuft und dadurch eine stauchende Kraft entgegen der Transportrichtung erfährt. Die stärkere Durchsaugung des Flores vor den Wasserstrahlen W vermeidet ein Aufbauschen des Flores vor der ersten Verfestigung durch die Wasserstrahlen W. Aufbauschen des Flores kann zu Unregelmäßig- keiten im Produkt führen, welche sich optisch negativ bspw. als Dichtestellen, Wolken zeigen und andererseits auch die Festigkeiten im Vlies ungünstig beeinflussen. Letztlich kann das Aufbauschen so weit gehen, dass der Flor in Kontakt mit dem Düsenbalken D gerät und beschädigt wird. Dies verursacht Störungen und Unterbrechungen im Produktions- ablauf. As a result of the asymmetrical alignment of the water jets with respect to the suction gap (the strips L1, L2), the material web F in the front region (distance a to the strip L1) experiences a greater throughput than in the rear region (distance b to the strip L2). This volumetrically stronger absorption of the material web F in the front region (a) stabilizes the pile, which accumulates on the water jets W and thereby experiences a compressive force against the transport direction. The stronger absorption of the Flores before the water jets W avoids bulging of the Flores before the first solidification by the water jets W. Bursting the Flores can lead to irregularities in the product, which show optically negative, for example, as density, clouds and on the other hand Influence nonwoven webs unfavorably. Ultimately, the bulging can go so far that the pile gets in contact with the nozzle beam D and damaged. This causes disruptions and interruptions in the production process.
In der Figur nicht dargestellt ist eine weiterbildende Ausführung der Erfindung, bei der in Förderrichtung der Materialbahn F vor dem Düsenbalken D eine Blasvorrichtung angeordnet ist, mittels der Luft im Be- reich a des Absaugspaltes auf die Oberfläche der Materialbahn geblasen wird. Not shown in the figure is a further embodiment of the invention, in which a blowing device is arranged in the conveying direction of the material web F in front of the nozzle beam D, is blown by means of the air in the area a of the suction on the surface of the web.
In einem Praxisbeispiel bestand die zu verfestigende Materialbahn F aus einem Spinnvlies aus Polypropylen (PP) mit einem Titer von 1.8den. Das Spinnvlies wurde nach dem Legen lediglich leicht ka- landriert und anschließend gemäß der Erfindung hydrodynamisch beaufschlagt. Der Wasserdruck in dem ersten Düsenbalken D betrug 80 bar, die Absaugung wurde mit 120 mbar Unterdruck beaufschlagt. Der Absaugspalt hatte eine Breite b von 12 mm, die Wasserstrahlen W wie- sen einen Abstand a von 10 mm von der vorderen Leiste L1 des Absaugspaltes auf. Durch diese Maßnahmen konnte die erste hydrodynamische Vernadelung ohne Kompaktierung mit einem spürbar niedrigeren Druck ausgeführt werden, was die Gefahr eines Aufbauschens des Flores zusätzlich reduziert hat. Gegenüber einer mittigen Orientierung der Wasserstrahlen gegenüber dem Absaugspalt konnte ein deutlich homogeneres Vlies störungsfrei produziert werden. Bezugszeichenliste: In a practical example, the material web F to be consolidated consisted of a spunbonded nonwoven made of polypropylene (PP) with a denier of 1.8 denier. The spunbonded fabric was only lightly calendered after laying and then acted upon hydrodynamically according to the invention. The water pressure in the first nozzle bar D was 80 bar, the suction was applied with 120 mbar vacuum. The suction gap had a width b of 12 mm, the water jets W had a distance a of 10 mm from the front strip L1 of the suction gap. As a result of these measures, the first hydrodynamic needling without compaction could be carried out with a noticeably lower pressure, which additionally reduced the risk of bulking of the flores. Compared to a central orientation of the water jets opposite the suction gap, a significantly more homogeneous nonwoven fabric could be produced without interference. LIST OF REFERENCE NUMBERS
S Siebband, Transportband S screen belt, conveyor belt
F Materialbahn, Flor  F material web, Flor
A Absaugung, Absaugspalt  A suction, suction gap
L1 Leiste, vordere Leiste  L1 bar, front bar
L2 Leiste, hintere Leise  L2 bar, rear quiet
AS Abscheider  AS separator
SV Saugventilator, Sauglufterzeuger SV suction fan, vacuum generator
SP Saugpumpe SP suction pump
D Düsenbalken  D nozzle bar
W Wasserstrahl, Fluidbeaufschlagung b Breite Absaugspalt  W Water jet, fluid loading b Wide suction gap
a Abstand Wasserstrahl vordere Leiste L1 c Abstand Wasserstrahl hintere Leiste L2 a distance water jet front strip L1 c distance water jet rear strip L2

Claims

Ansprüche claims
1. Vorrichtung zum Verfestigen einer aus Fasern und/oder Filamenten gebildeten Materialbahn, bestehend aus einem die Materialbahn tragenden Siebband, einem oberhalb des Siebbandes angeordneten Düsenbalken zur Beaufschlagung der Materialbahn mit einem unter Druck stehendem Fluid in Form von einer Vielzahl von in wenigstens einer Reihe angeordneten Fluidstrahlen, einer unterhalb des Siebbandes angeordneten und mit dem Düsenbalken zusammenwirkenden Absaugung mit einem Absaugspalt, wobei die Fluidstrahlen im Flächenbereich des Absaugspaltes auf die Materialbahn treffen, Anspruch [en] A device for consolidating a material web formed from fibers and / or filaments, comprising a web carrying the web, a nozzle beam arranged above the wire web for impinging the web with a pressurized fluid in the form of a plurality of in at least one row Fluid jets, a suction arranged below the screen belt and cooperating with the nozzle bar with a suction gap, wherein the fluid jets meet in the surface area of the suction gap on the material web,
dadurch gekennzeichnet, characterized,
dass die Fluidbeaufschlagung (W) in dem in Förderrichtung der Materialbahn (F) hinteren Bereich des Absaugspaltes (A) erfolgt. the fluid admission (W) takes place in the rear area of the suction gap (A) in the conveying direction of the material web (F).
2. Vorrichtung nach Anspruch 1 , 2. Apparatus according to claim 1,
gekennzeichnet durch, marked by,
die Fluidbeaufschlagung (W) erfolgt im hinteren Viertel des Absaugspaltes (A). the fluid (W) takes place in the rear quarter of the suction gap (A).
3. Vorrichtung nach Anspruch 1 oder 2, 3. Apparatus according to claim 1 or 2,
gekennzeichnet durch, marked by,
die Absaugung (A) ist als eine mit einem Sauglufterzeuger (SV) verbundene, oben offene Kammer ausgebildet, dessen Oberseite von dem Siebband (S) abgedeckt ist und die in Transportrichtung der Material- bahn (F) von je einer Leiste (L1 , L2) begrenzt wird. the suction (A) is formed as a connected to a suction air generator (SV), open-topped chamber, the top of which is covered by the wire (S) and in the transport direction of the material web (F) by a respective strip (L1, L2 ) is limited.
4. Vorrichtung nach einem der vorhergehenden Ansprüche, gekennzeichnet durch, 4. Device according to one of the preceding claims, characterized by,
oberhalb der durch das Siebband (S) getragenen Materialbahn (F) ist der Absaugung eine Blasvorrichtung zugeordnet, durch die Luft auf die Oberfläche der Materialbahn (F) geblasen wird. Above the material web (F) carried by the screen belt (S), the suction device is assigned a blowing device, through which air is blown onto the surface of the material web (F).
5. Vorrichtung nach Anspruch 4, 5. Apparatus according to claim 4,
gekennzeichnet durch, marked by,
die Blasvorrichtung weist Luftleitelemente auf. the blowing device has air guiding elements.
6. Vorrichtung nach Anspruch 5, 6. Apparatus according to claim 5,
gekennzeichnet durch, marked by,
die Luftleitelemente der Blasvorrichtung sind einstellbar. the air guide elements of the blowing device are adjustable.
7. Vorrichtung nach Anspruch 4, 7. Apparatus according to claim 4,
gekennzeichnet durch, marked by,
durch die Blasvorrichtung ist der Flor der Materialbahn in Förderichtung unterschiedlich stark mit Blasluft beaufschlagbar. by the blowing device of the web of the web in the conveying direction is different strong acted upon with blown air.
EP11711252.4A 2010-02-25 2011-01-29 Device for solidifying a material web Not-in-force EP2539498B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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DE102010009275A DE102010009275A1 (en) 2010-02-25 2010-02-25 Device for solidifying a material web
PCT/DE2011/000085 WO2011103850A1 (en) 2010-02-25 2011-01-29 Device for solidifying a material web

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CN108677444B (en) * 2018-06-21 2020-11-10 海宁巨龙新材料股份有限公司 Automatic shearing equipment for textile fabrics and shearing processing technology thereof

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UA106271C2 (en) 2014-08-11
DE102010009275A1 (en) 2011-08-25
CN102844485A (en) 2012-12-26
CN102844485B (en) 2015-08-19
US20130042448A1 (en) 2013-02-21
WO2011103850A1 (en) 2011-09-01
ES2520640T3 (en) 2014-11-11
EP2539498B1 (en) 2014-08-06
EA201290826A1 (en) 2013-01-30

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