EP0818568B1 - Procédé et dispositif pour l'entrelacement hydrodynamique de fibres d'une nappe fibreuse - Google Patents

Procédé et dispositif pour l'entrelacement hydrodynamique de fibres d'une nappe fibreuse Download PDF

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Publication number
EP0818568B1
EP0818568B1 EP96115337A EP96115337A EP0818568B1 EP 0818568 B1 EP0818568 B1 EP 0818568B1 EP 96115337 A EP96115337 A EP 96115337A EP 96115337 A EP96115337 A EP 96115337A EP 0818568 B1 EP0818568 B1 EP 0818568B1
Authority
EP
European Patent Office
Prior art keywords
fibrous web
endless belt
needling
endless
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.)
Expired - Lifetime
Application number
EP96115337A
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German (de)
English (en)
Other versions
EP0818568A3 (fr
EP0818568A2 (fr
Inventor
Gerold Fleissner
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 GmbH
Original Assignee
Fleissner GmbH
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Filing date
Publication date
Application filed by Fleissner GmbH filed Critical Fleissner GmbH
Publication of EP0818568A2 publication Critical patent/EP0818568A2/fr
Publication of EP0818568A3 publication Critical patent/EP0818568A3/fr
Application granted granted Critical
Publication of EP0818568B1 publication Critical patent/EP0818568B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • 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

Definitions

  • the invention relates to a method for hydrodynamic entangling, for binding-free solidification of the fibers of a fibrous web made of natural and / or artificial fibers of any kind, in which the fibers of the fibrous web are intertwined with one another by means of a large number of water jets flowing in under high pressure, the optimum The fibers of the fibrous web of the top and bottom sides are re-entangled, and the water jets not only meet one behind the other, but repeatedly on the fibrous web, thereby guiding the fibrous web in a meandering manner.
  • a method of this kind is e.g. B. from US-PS 3,485,706, Fig. 40, or from the "Taschenbuch für die Textilindustrie” 1991, Verlag Schiele & Schön GmbH, Berlin, pages 416-440, in particular picture 6 on page 423. From this essay by Dr. J. Hendler clearly shows that the result of the hydrodynamic hardening depends on the number of machining changes, i.e. on the mutual exposure to the water jets. In order to implement this principle of multistage needling, different devices are possible.
  • the meandering web guide is essential so that the other side of the fiber web is the new top side, which is then exposed to the water jets.
  • the fibrous web is very easily stretchable in the longitudinal direction before final consolidation. Since the hydrodynamic needling must also be carried out on a water-permeable belt or on such a drum in order to discharge the sprayed-on water, the fibrous web is pressed into the structure of the belt or drum. When the fiber web is transferred from one drum to the following drum according to the "General Nonwoven Report", a longitudinal tension is created in the fiber web.
  • the drums arranged one behind the other must also be arranged very close to one another when the very thin fleece is transferred, that is to say they must have and maintain precise circulating accuracy.
  • the invention has for its object to develop a method and an apparatus with which a fiber web can be needled water; which is not subjected to longitudinal tension during the mutual treatment, i.e. can be needled without warping.
  • the solution to the problem is seen in the fact that the fiber web when changing the processing area and when Change of the contact surface of the fiber web supported by a continuous endless belt and thereby the fiber web is continuously supported in a form-fitting, stretch-free manner.
  • a device for hydrodynamic entangling, for binding-free solidification of the fibers of a fiber web made of natural and / or artificial fibers of any kind in which several nozzle bars extend one behind the other across the width of the fiber web, from which one against the fiber web directional nozzle holes for jet interweaving of the fibers, a liquid can flow out against the fiber web under high pressure, with not only several nozzle bars in succession for the fiber web of the fiber web of the top and bottom sides, but these are mutually assigned to the fiber web several times by several device units one Needling device arranged one behind the other in the production direction and the fiber web is guided in a meandering manner and is exposed to the fluid jets on both sides.
  • the fiber web between the individual device units is now continuously positive and thus has to be supported on one side without stretching when changing the processing side, in such a device with a plurality of deflecting rollers around which at least partially an endless belt is guided is, and a plurality of endless belts arranged one behind the other in the transport direction of the web, the respective endless belt is assigned a deflecting roller, if appropriate one of a following endless belt which is synchronized at this point, and this deflecting roller is designed as a takeover roller. It is no longer possible to warp the fiber web when transferring from one belt to the following drum or belt.
  • the takeover roller should be assigned tangentially to the upstream endless belt to form a takeover line, better still be pressed against the upstream endless belt so that it plunges into the plane of the tensioned endless belt. If the transfer of compressed air and / or suction is now supported by the endless conveyor belt or drum, this is definitely the case a problem-free, also automatic transport of the fiber web through the entire needling device is guaranteed.
  • the needling of a fibrous web lying on a wire belt is more effective because the drum, because the possibly diverse material for producing the drum-shell structure brings more resistance to the water jet.
  • the water penetrating the fibrous web when needling the fibrous web can be removed more effectively and can be sucked off at the end of the needling during predrying.
  • the energetic side must also be considered, because the greater resistance on a drum must be overcome with greater energy in order to achieve the same result.
  • the solution to the object is possible in any case. Either all takeover rollers are wrapped in an endless belt or only partially. The only requirement is that the transfer to the next transport organ is supported. For this purpose, reference is made to the following description of the figures.
  • the needling drums or only the transfer drums are arranged one above the other in the exemplary embodiments and are of the same diameter.
  • the fiber web 2 coming from a carding machine runs onto the endless belt 4 tensioned by four deflecting rollers 3.
  • a takeover roller 5 is arranged above, which is not only arranged tangentially to the endless belt 4 , but immersed in the plane of the tensioned endless belt 4. This ensures a safe, distortion-free transfer of the fiber web.
  • the fiber web is only wetted by means of the nozzle bar 6 assigned to the endless belt 4 according to FIG. 1.
  • the transfer roller 5 is also wrapped in an endless belt 8, the lower run of which slowly compresses the fleece arriving voluminously on the belt 4 and leads into the take-over gap on the nozzle bar 6.
  • the first needling is now carried out on the takeover roller 5, here with three nozzle bars 7.
  • the takeover roller 5 is wrapped in the endless belt 8, which mainly ensures the transport from the takeover roller 5 to the following roller.
  • This roller is also wrapped in an endless belt 10, the roller not only being a deflecting roller for the endless belt, but also the takeover roller 9.
  • This takeover roller 9 is also immersed in the tensioned endless belt 8 so that the transfer of the fiber web 2 to the second needling to be carried out on the other side can now be carried out without distortion.
  • the second needling is then carried out alternately on the takeover roller 9 by means of the associated nozzle bars 13, of which only two are shown here. Other versions are possible.
  • the takeover roller 14 with the nozzle bar 15 and the takeover roller 17 is arranged.
  • Each of the takeover rollers 14, 17 is wrapped in an endless belt 16 or 18, so that the desired direct, slip-free transfer of the fiber web 2 can take place by immersing the respective takeover roller in the plane of the associated endless belt.
  • the transfer can be supported by compressed air 11 and / or suction 12.
  • the fourth needling with the nozzle bar 20 is not carried out on the takeover roller 17, but on the endless belt 18 with subsequent high-performance suction 19 in order to bring the needled fiber web 2 as dry as possible into the following dryer, not shown.
  • the other examples are partially similar to FIG. 1, in this case they are provided with the same reference numerals.
  • the example according to FIG. 3 shows a version of the needling which is not only carried out in three stages here, but the goods are guided from top to bottom and the second takeover roller 9 'is not wrapped in an endless belt.
  • This belt which is still necessary in the example according to FIG. 1, can be omitted here, since the takeover roller 9 ′ plunges both into the plane of the endless belt 4 and into that of the endless belt 18.
  • FIG. 4 in which the takeover roller 14 with the endless belt 16 is connected to the takeover roller 9 'for four-stage needling, which then, as in FIG. 1, is followed by the final endless belt 18 with the needling on the belt.
  • the needled fiber web 2 now runs in the opposite direction to the arrow 1.
  • This possibility has been changed in the example according to FIG. 5 by the additional arrangement of a takeover roller 17 'with nozzle bar 22, which in turn is effective according to the invention without a continuous endless belt.
  • the same principle applies here as for the takeover roller 9 '.
  • Then follows the possibly necessary fifth needling, the endless belt 21 with the final needling with the bars 20 and the suction 19.
  • the embodiment according to FIG. 6 represents a version in which only less energy is needed for needling, because the needling stations are essentially provided on the endless belts.
  • the fiber web 2 only runs over the endless belt 4 to the takeover roller 5, where the first needling with the nozzle bars 7 takes place.
  • the fibrous web runs on the takeover roller 9 only on the underside of the endless belt 10 'extending to the right, is then deflected upward and needled by means of the nozzle bar 13 on the belt 10'.
  • the endless belt 10 ' also extends to the left, where it touches the takeover roller 14 or dips it into the plane of the endless belt 10'.
  • This roller 14 also wraps around an endless belt 16 'on both sides, on the lower run of which it is first led upwards again in order to reach the nozzle bars 15 assigned to the belt 16'. The final needling is then again carried out as in FIG. 1 on the belt 18.
  • the transfer rollers 5, 9, 14, which are respectively tangentially assigned to the endless belts 4, 8 ', 10', are designed to be air-permeable, although there is no needling on them, as is partially the case in the previous exemplary embodiments 1-5 2 has the advantage that the takeover of the fibrous web 2 with supporting air from nozzles 11 and / or a suction draft can be influenced by the takeover roller 5, 9, 14. Water can also be sprayed from the nozzles 11 against the endless belt carrying the fiber web 2. In such a case, a Perforation of the takeover roller can be dispensed with. The only thing that matters here is that the fiber web previously needled and thus pressed into the endless belt detaches from the endless belt and is delivered to the following endless belt without delay.
  • a plurality of nozzles such as air nozzles 11, can also be directed against the load-bearing endless belt in this region or only one nozzle can be arranged displaceably. This possibility is illustrated by reference number 24.
  • the web guide according to arrow 1 is from bottom to top.
  • this can also take place from top to bottom through the entire device, in which case the effect of the air 11 and suction nozzles 12, as in FIGS. 3-5, must of course also be reversed.

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

Claims (16)

  1. Procédé d'enchevêtrement hydrodynamique destiné à consolider sans moyen de liaison les fibres d'une nappe fibreuse constituée de fibres naturelles et /ou artificielles de tous types, dans lequel les fibres de la nappe fibreuse sont entremêlées à l'aide d'une multitude de jets d'eau affluant à haute pression, lesdits jets d'eau étant non seulement disposés les uns derrière les autres mais se rencontrant plusieurs fois alternativement sur la nappe fibreuse, pour un enchevêtrement arrière optimal des fibres de la nappe fibreuse des faces supérieure et inférieure et la nappe fibreuse étant en forme de méandres, caractérisé en ce que la nappe fibreuse, en cas de changement de la surface de traitement et de la surface d'applique de la nappe fibreuse, soutient et supporte ces surfaces par l'intermédiaire d'une bande sans fin entraînée, et en ce que la nappe fibreuse est guidée sans dilatation, avec adhérence et de manière ininterrompue.
  2. Dispositif d'enchevêtrement hydrodynamique destiné à consolider sans moyen de liaison les fibres d'une nappe fibreuse (2) constituée de fibres naturelles et / ou artificielles de tous types, dans lequel plusieurs poutres à tuyères (6, 7, 13, 15, 20, 22) s'étendent transversalement sur la largeur de la nappe fibreuse, un liquide à haute pression pouvant s'écouler vers la nappe fibreuse à partir des trous de tuyères orientées vers la nappe fibreuse (2), pour l'enchevêtrement par rayonnement des fibres, plusieurs jets d'eau (6, 7, 13, 15, 20, 22) étant non seulement disposés les uns derrière les autres mais se rencontrant plusieurs fois alternativement sur la nappe fibreuse, pour un enchevêtrement arrière optimal des fibres de la nappe fibreuse des faces supérieure et inférieure, plusieurs entités d'un dispositif d'aiguilletage étant disposés les uns derrière les autres dans la direction de production et la nappe fibreuse guidée de manière à former des méandres étant exposée des deux côtés aux jets de fluide, caractérisé en ce que la nappe fibreuse (2) située entre les différentes entités peut être guidée avec adhérence et sans interruption entre les différentes entités, tout en étant soutenu, lors du changement du côté de traitement, sans dilatation, en tous cas sur un côté, dans la mesure où, avec un tel dispositif comprenant une multitude de rouleaux de renvoi autour desquels une bande sans fin a été guidée au moins partiellement, et avec plusieurs bandes sans fin disposées les unes derrières les autres dans la direction de transport de la voie de marchandises, un rouleau de renvoi ou, le cas échéant, une bande sans fin suivante parallèle à cet endroit, a été raccordé(e) directement à la bande sans fin (4, 8, 8', 10, 10', 16, 16') et dans la mesure où ce rouleau de renvoi a été conçu sous la forme d'un rouleau de reprise (5, 9, 9', 14, 17, 17').
  3. Dispositif selon la revendication 2, caractérisé en ce que le rouleau de reprise (5, 9, 9', 14, 17, 17') a été conçu sous la forme d'un tambour perméable à l'air.
  4. Dispositif selon la revendication 3 ou 4, caractérisé en ce que la bande sans fin (8, 10, 16, 18) du rouleau de reprise (5, 9, 9', 14, 17, 17') a été raccordée tangentiellement à la bande sans fin (4, 8, 8', 10, 10', 16, 16') disposée en amont afin de former une ligne de reprise.
  5. Dispositif selon une des revendications précédentes, caractérisé en ce que le rouleau de reprise (5, 9, 9', 14, 17, 17') peut être pressé contre la bande sans fin (4, 8, 8', 10, 10', 16, 16') disposée en amont et peut ainsi être inséré dans le plan de guidage de la bande sans fin guidée de manière tendue entre deux rouleaux de retour (3) raccordés à cette bande sans fin.
  6. Dispositif selon une des revendications précédentes, caractérisé en ce que les poutres à tuyères (13, 15, 20, 23) les plus proches de l'unité d'aiguilletage suivante ont été raccordées à la bande sans fin (8', 10', 16', 18) suivante dans la direction de transport.
  7. Dispositif selon la revendication 6, caractérisé en ce que les bandes sans fin (4, 8', 10', 16', 18) sont guidées dans la zone d'aiguilletage parallèlement les unes aux autres et en ce que les poutres à tuyères (7', 23, 13, 15, 20) sont orientées perpendiculairement vers le bas en direction des bandes sans fin.
  8. Dispositif selon la revendication 7, caractérisé en ce que quatre ou cinq bandes sans fin (4, 8', 10', 18) peuvent être disposées les unes au-dessus des autres et peuvent être entourées au moins partiellement sous la forme de méandres, par la nappe fibreuse (2), en ce que la bande sans fin (8', 10', 16', 18) disposée en aval et au-dessus a été avancée horizontalement dans la direction de transport et ainsi disposée de telle sorte qu'un espace d'aménagement a été prévu pour les poutres à tuyères (7', 23, 13, 15) de la bande sans fin (4, 8', 10', 16') disposée en amont, au-dessus de la hauteur de la bande sans fin disposée en aval (8', 10', 18).
  9. Dispositif selon une des revendications précédentes, caractérisé en ce que les poutres à tuyères (7, 13, 15) de l'unité d'aiguilletage suivante dans la direction de transport ont été raccordée au rouleau de reprise (5, 9, 14).
  10. Dispositif selon une des revendications précédentes, caractérisé en ce qu'un seul tambour d'aiguilletage (9', 17') sans bande sans fin entourant ledit tambour a été disposé entre deux bandes sans fin (8, 18 ; 8, 16 ; 16, 21) et en ce que les deux bandes sans fin (8, 16 ; 8, 18 ; 16, 21) guidées de manière étirée ont été raccordées tangentiellement au tambour d'aiguilletage (9', 17').
  11. Dispositif selon une des revendications précédentes, caractérisé en ce que le tambour d'aiguilletage (5, 9') a été enfoncé dans le plan de guidage des deux bandes sans fin (2, 4 ; 8, 16).
  12. Dispositif selon une des revendications précédentes, caractérisé en ce que l'unité d'aiguilletage finale (20) a été raccordée à une bande sans fin (18, 21) et en ce que une poutre d'aspiration (19) a été disposée derrière l'unité d'aiguilletage (20), en synchronisation et sous la bande sans fin.
  13. Dispositif selon une des revendications précédentes, caractérisé en ce que le long de la ligne de reprise de la nappe fibreuse entre la bande sans fin et le rouleau de reprise ou inversement, au moins une tuyère (11) en forme d'entaille active dans la direction de transport, orientée vers la face supérieure ultérieure de la nappe fibreuse, raccordée à cette nappe et alimentée par de l'eau ou de l'air, a été disposée.
  14. Dispositif selon la revendication 13, caractérisé en ce que la tuyère (11) a, par rapport au rouleau ou à la ligne de reprise, été disposé de manière à pouvoir coulisser (24) et / ou pivoter parallèlement à la bande sans fin.
  15. Dispositif selon une des revendications précédentes, caractérisé en ce qu'un canal d'aspiration (12) en forme d'entaille actif dans la direction de transport, orienté vers la face inférieure ultérieure de la nappe fibreuse et destiné à aspirer l'eau et /ou l'air a été raccordé le long de la ligne de reprise de la nappe fibreuse entre la bande sans fin et le rouleau de reprise ou inversement.
  16. Dispositif selon la revendication 15, caractérisé en ce que le canal d'aspiration (12) a été disposé dans le rouleau de reprise perméable à l'air (5, 9, 9', 14, 17, 17') et agit sur la nappe fibreuse via la paroi du rouleau de reprise.
EP96115337A 1996-07-08 1996-09-25 Procédé et dispositif pour l'entrelacement hydrodynamique de fibres d'une nappe fibreuse Expired - Lifetime EP0818568B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627256 1996-07-08
DE19627256A DE19627256A1 (de) 1996-07-08 1996-07-08 Verfahren und Vorrichtung zum hydromechanischen Verschlingen der Fasern einer Faserbahn

Publications (3)

Publication Number Publication Date
EP0818568A2 EP0818568A2 (fr) 1998-01-14
EP0818568A3 EP0818568A3 (fr) 2000-05-03
EP0818568B1 true EP0818568B1 (fr) 2004-04-28

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EP96115337A Expired - Lifetime EP0818568B1 (fr) 1996-07-08 1996-09-25 Procédé et dispositif pour l'entrelacement hydrodynamique de fibres d'une nappe fibreuse

Country Status (4)

Country Link
US (1) US5761778A (fr)
EP (1) EP0818568B1 (fr)
JP (1) JP3677126B2 (fr)
DE (2) DE19627256A1 (fr)

Cited By (1)

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EP4067550B1 (fr) 2021-03-29 2023-06-14 Andritz Küsters GmbH Installation de renforcement d'au moins une couche fibreuse déposée à l'état humide ou sec en une bande non tissée

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DE59611001D1 (de) 2004-06-03
EP0818568A3 (fr) 2000-05-03
US5761778A (en) 1998-06-09
EP0818568A2 (fr) 1998-01-14
JP3677126B2 (ja) 2005-07-27
JPH1025649A (ja) 1998-01-27
DE19627256A1 (de) 1998-01-15

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