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EP0817875B1 - Appareil et dispositif de production de non-tisses - Google Patents

Appareil et dispositif de production de non-tisses Download PDF

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Publication number
EP0817875B1
EP0817875B1 EP96907457A EP96907457A EP0817875B1 EP 0817875 B1 EP0817875 B1 EP 0817875B1 EP 96907457 A EP96907457 A EP 96907457A EP 96907457 A EP96907457 A EP 96907457A EP 0817875 B1 EP0817875 B1 EP 0817875B1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
nonwoven
web
suction
main cylinder
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
EP96907457A
Other languages
German (de)
English (en)
Other versions
EP0817875A1 (fr
EP0817875B2 (fr
Inventor
Werner Lasenga
Wolfram Dudek
Wilhelm Borgert
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.)
Spinnbau GmbH
Original Assignee
Spinnbau GmbH
Jacob Holm Industries France SAS
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7758306&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0817875(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Spinnbau GmbH, Jacob Holm Industries France SAS filed Critical Spinnbau GmbH
Publication of EP0817875A1 publication Critical patent/EP0817875A1/fr
Application granted granted Critical
Publication of EP0817875B1 publication Critical patent/EP0817875B1/fr
Publication of EP0817875B2 publication Critical patent/EP0817875B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above

Definitions

  • the invention is directed to an apparatus according to the preamble of claim 1 for the production of nonwovens using at least one carding machine designed for high production speeds of the fiber webs, from which a nonwoven is mechanically transferred to a conveyor belt, and a method for the production of nonwovens according to the preamble of claim 11.
  • FR-A-2545507 and DE-A-3832858 relate to an apparatus for the production of nonwovens comprising a plurality of carding rollers from which the fibers are thrown into an air stream.
  • the dispersed fibers are carried by the air stream onto a condensing means which is built by an air-permeable belt which is subjected to suction from below.
  • This apparatus produces an airlaid nonwoven web.
  • the conveyor belts is air-permeable, and that, at the transition region between the carding machines and the conveyor belt, an underground suction force is applied using a suction means arranged at the conveyor belts.
  • the suction is set to be just sufficient to remove the air film generated between the nonwoven and the conveyor belt at high transport speeds while, on the other hand, the nonwoven will not be sucked too firmly against the conveyor belt. Due to the removal of the air film, no disturbances of the appearance of the nonwoven will occur, not even at speeds of the nonwoven above 150 to 200 m/min.
  • the speed of the nonwoven can be as high as 400 m/min. or more.
  • the solution according to the invention offers the considerable advantage invention that the nonwoven is subjected to a relatively small draft. This is favorable especially in case of high speeds of the nonwoven because already a relatively small percentage draft can result in high absolute draft values, which can cause disturbances of the structure of the nonwoven.
  • a take-off roller transfers a doubled non-woven onto the conveyor belt.
  • a doubled nonwoven has better cohesion and thus is better suited for high speeds. Because a doubled nonwoven is transferred to the conveyor belt by a sole roller, the number of transition regions is reduced. Further, doubling the nonwoven within the carding machine provides the advantage that no further intermediate conveyor belts are required, so that the overall expenditure for machinery can be reduced.
  • the apparatus according to the invention is particularly useful for the processing of staple fibers, i.e. polyester, polyethylene or polypropylene fibers.
  • the suction means can exert the suction effect on the conveyor belt in sections.
  • selected portions of the conveyor belt are sucked at different intensities, depending on their current position and their distance from the transition region between the carding machine and the conveyor belt. This is facilitated also because, after the generation of an air film at the transition region between the carding machines and the conveyor belt has been prevented, only a relatively small suction force is required from then on.
  • suction boxes are arranged below the conveyor belt, extending, on the one hand, over the desired width of the nonwoven and, on the other hand, at least over part of the conveyor belt in the longitudinal direction. Limiting the suction to the desired width of the nonwoven offers the advantage that a sharp, linear end edge of the nonwoven will be generated, without any control or guide means being required on the upper side of the conveyor belt.
  • the conveyor belts can have a structured surface on the side facing towards the nonwoven.
  • the vacuum generated by the suction means can be controllable in a variable manner. Thus, it is possible to adapt the underground suction to the current production speed and/or the type of the fibers being processed, or to other process parameters.
  • the carding machine used comprises a main cylinder, at least two web-forming rollers engaging the main cylinder and each taking off a respective fiber web from the main cylinder, a doffing means arranged downstream of the web-forming rollers, and a take-off means from which the nonwoven is transferred to the conveyor belt.
  • a common roller arranged upstream of the take-off means, the at least two fiber webs taken off the main cylinder by the web-forming rollers, are doubled into a nonwoven which is laid as a formed web onto the conveyor belt.
  • a carding machine of the above type makes it possible to perform doubling and simultaneous crosslinking of the fiber webs already within the carding machine after the web-forming rollers and before the take-off means.
  • a further advantage resides in that, behind the doffing roller, only a sole take-off means and a sole conveyor belt are required.
  • a sole doffing roller is arranged in engagement with two web-forming rollers, that the doffing roller takes over a respective fiber web from each of the two web-forming rollers and doubles the fiber webs. Doubling is carried out immediately behind the web-forming rollers so that only one doffing roller is required.
  • the apparatus for the production of nonwovens 1 comprises two carding machines 2 with a respective feed means 3, the carding machines 2 laying the respective generated nonwoven 1 onto a common conveyor belt 4.
  • the conveyor belt 4 is provided as an endless belt and is permeable to air to be subjected to a suction force from below.
  • Behind the second carding machine 2 the repeatedly doubled nonwoven 1 is running into a following processing unit 14, e.g. a thermobonding means.
  • the apparatus for the production of nonwovens 1 can be provided with one carding machine 2 only or with more than two carding machines 2.
  • the carding machines used can be high-speed carding machines with production speeds above 150 m/min., preferably above 200 m/min.
  • the first carding machine 2 in the running direction of conveyor belt 4 will lay a first nonwoven 1 onto the conveyor belt 4, notably in the transition region 6 between the carding machine 2 and the conveyor belt 4.
  • a suction means 8, consisting of a plurality of suction boxes 10 distributed along the length of conveyor belt 4, is provided to subject the transition region 6 to a suction force by means of a first suction box 10.
  • This underground suction at the transition region 6 precludes the formation of any air film between the nonwoven 1 and the conveyor belt 4, which air film, in case of high production speeds, would at least disturbe the uniform appearance of nonwoven 1 or even cause complete destruction of nonwoven 1.
  • the suction box 10 located at transition region 6 can be provided with a partition wall 11 so that the suction force acting on conveyor belt 4 is increased in the transition region 6.
  • This partition wall 11 can also be arranged to be pivoted and/or displaced in suction box 10, so that the vacuum force and the area exposed to suction can be variably controlled in an easy manner.
  • the transition region 6 can be provided with a separate suction box 10.
  • the position of partition wall 11 shown in Fig. 3 will automatically cause a weaker suction force acting on conveyor belt 4 behind transition region 6.
  • Another possibility for adjustment in the transition region 6 resides in shifting a slider, extending in parallel to conveyor belt 4 and being adjustable in running direction, for variably setting the sucked area under the conveyor belt.
  • respective support rollers 16 are provided for supporting the conveyor belt 4.
  • the suction capacity of the suction boxes 10 can be variably controlled in dependence on the production speed and the type of fibers. Control can be carried out by a central processing unit. In each case, the suction is set such that the generation of an air film is prevented particularly in the transition regions 6, without sucking the nonwoven 1 onto the - if required, structured - surface of the conveyor belt 4 at an excessive force.
  • the second carding machine 2 in the running direction of conveyor belt 4 will produce a second non-woven 1 which, at the second transition region 6 in the running direction of the belt, is laid onto the first nonwoven 1 produced by the first carding machine 2, thus doubling the nonwoven 1.
  • the suction box 10 arranged at this second transition region 6 can be operated at a higher vacuum for compensating the pressure loss due to the first nonwoven 1.
  • formation of an air film between the first and the second nonwovens and a resultant possible disturbance are precluded.
  • the carding machine used is of the type described in DE 43 44 226 A.
  • the carding machine schematically shown in Fig. 1 comprises a main cylinder 20 arranged in engagement with two randomizing rollers 22 which in turn engage a doffing roller 24 and will double respectively two fiber webs 50,52 on doffing roller 24.
  • the doubled fiber web will then be transferred from doffing roller 24 to two condensing rollers 26 and, from these, to two successive take-off rollers 28.
  • the nonwoven 1 is laid onto conveyor belt 4 at transition region 6.
  • it is essential that the doubled nonwoven 1 is transferred onto conveyor belt 4 by a sole take-off roller 29.
  • Fig. 3 shows a preferred embodiment of a non-woven carding machine provided with an intake means 30 consisting of an intake trough 32 and an intake roller 34.
  • the subsequent licker-in device 36 comprises a licker-in roller 38 and a licker-in tambour 40.
  • the licker-in tambour 40 is provided with two worker and stripper pairs 42.
  • This arrangement is followed by a transfer roller 44 for transferring the supplied fiber web 46 to main cylinder 20.
  • Main cylinder 20 is provided with six worker and stripper pairs 48. Behind the worker and stripper pairs when viewed in the direction of rotation, two web-forming randomizing rollers 22,23 engage main cylinder 20 successively in the direction of rotation, each of them taking off one fiber web 50,52 from main cylinder 20.
  • a sole doffing roller 24 takes over both fiber webs 50,52 from the randomizing rollers 22,23 and doubles the webs so that a doubled fiber web 54 is transferred to the subsequent condensing means 26,27 and the take-off means 28,29 arranged behind condensing means 26,27. From take-off means 28,29, the doubled fiber web 54 reaches conveyor belt 4 in the form of a nonwoven 1.
  • the randomizing rollers 22,23 are combined with only one doffing roller 24
  • the randomizing rollers can be arranged in close proximity to each other, thus leaving enough space on the periphery of main cylinder 20 for an additional worker and stripper pair 48.
  • Such an additional worker and stripper pair 48 increases the carding performance.
  • the web-forming rollers 22,23 preferably provided as randomizing rollers, can have different rotational speeds or different diameters whereby the properties of the to-be-doubled fiber webs 50,52 can be influenced.
  • the main cylinder 20 is preferably larger than the web-forming rollers 22,23.
  • the doffing roller 24 has a larger diameter than the web-forming rollers 22,23.

Landscapes

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

Claims (17)

  1. Appareil de production de non-tissés (1) comprenant au moins une carde (2) et au moins une bande transporteuse (4) pour transporter le non-tissé (1), transféré sur la bande transporteuse (4) par un moyen détacheur (29) de ladite carde (2),
    caractérisé en ce que la bande transporteuse (4) est perméable à l'air, et en ce que les zones de transition (6) entre le rouleau détacheur (29) et la bande transporteuse (4) sont soumises à une aspiration par en-dessous, engendrée par un moyen d'aspiration (8) comportant au moins une caisse aspirante (10) aménagée au niveau de la bande transporteuse (4) et réglée pour supprimer un film d'air engendré entre les non-tissés (1) et la bande transporteuse (4) à des vitesses de transport au-dessus de 150 à 200 m/mn.
  2. Appareil selon la revendication 1, caractérisé en ce que, au niveau de la zone de transition (6), ledit rouleau détacheur (29) transfère un non-tissé doublé (1) sur la bande transporteuse (4).
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que la force d'aspiration du moyen d'aspiration (8) agissant sur la bande transporteuse (4) est appliquée par sections sur toute la longueur de la bande transporteuse (4).
  4. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une pluralité de caisses aspirantes (10) sont aménagées en-dessous de la bande transporteuse (4), lesdites caisses aspirantes (10) s'étendant sur la largeur désirée du non-tissé (1) et au moins sur une partie de la bande transporteuse (4) dans la direction longitudinale.
  5. Appareil selon l'une des revendications 1 à 4, caractérisé en ce que la bande transporteuse (4) conduit à un moyen de liage thermique (14) et en ce que toute la bande transporteuse (4) entre la zone de transition (6) et le moyen de liage thermique (14) est soumise à une aspiration.
  6. Appareil selon l'une quelconque des revendications 1 à 5, caractérisé en ce que, pour améliorer l'adhérence, la bande transporteuse (4) a une surface nervurée du côté dirigé vers le non-tissé (1).
  7. Appareil selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la dépression engendrée par le moyen d'aspiration (8) peut être commandée de façon variable pour différentes sections.
  8. Appareil selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la carde (2) comprend un cylindre principal (20), au moins deux rouleaux de formage de voile (22, 23) venant en prise avec le cylindre principal (20), chacun d'eux détachant un voile de carde (50, 52) du cylindre principal (20), un moyen de décharge (24) aménagé en aval des rouleaux de formage de voile (22, 23), et un moyen détacheur (28), et en ce que, par utilisation d'un rouleau commun (24), les voiles de carde (50, 52) au nombre d'au moins deux, détachés du cylindre principal (20) par les rouleaux de formage de voile (22, 23),sont doublés pour donner un non-tissé (1) en amont du moyen détacheur (28).
  9. Appareil selon la revendication 8, caractérisé en ce que deux rouleaux de formage de voile indépendants l'un de l'autre (22, 23), venant en prise avec le cylindre principal (20) et tournant dans le même sens que le cylindre principal (20), détachent chacun un voile de carde (50, 52) du cylindre principal (20), et en ce qu'un rouleau de décharge unique (24) du moyen de décharge, en prise avec les deux rouleaux de formage de voile (22, 23), détache un voile de carde respectif (50, 52) de chacun des deux rouleaux de formage de voile (22, 23) et double les voiles de carde (50, 52) en un non-tissé (1).
  10. Appareil selon l'une quelconque des revendications 1 à 9, caractérisé en ce que chaque carde d'une pluralité de cardes (2) dépose un non-tissé (1) sur la bande transporteuse commune (4).
  11. Procédé de production de non-tissés (1) à de grandes vitesses de fonctionnement, utilisant au moins une carde (2) et au moins une bande transporteuse (4), le non-tissé (1) étant transféré mécaniquement sur la bande transporteuse (4),
    caractérisé en ce qu'une bande transporteuse perméable à l'air (4) est utilisée, et en ce que, dans les zones de transition (6) entre la carde (2) et la bande transporteuse (4), une dépression sous-jacente est appliquée à la bande transporteuse (4) pour supprimer un film d'air engendré entre le non-tissé (1) et la bande transporteuse (4) à de grandes vitesses de transport au-dessus de 150 à 200 m/mn.
  12. Procédé selon la revendication 11, caractérisé en ce qu'un non-tissé doublé (1) est transféré sur la bande transporteuse (4) par un rouleau unique (29).
  13. Procédé selon la revendication 11 ou 12, caractérisé en ce que la dépression est variable avec l'augmentation de la distance à la zone de transition (6).
  14. Procédé selon l'une quelconque des revendications 11 à 13, caractérisé par l'utilisation d'une carde (2) dans laquelle, à une étape de formage de voile, deux voiles de carde (50, 52) sont détachés du cylindre principal (20) de la carde (2) par les deux rouleaux de formage de voile (22, 23) indépendants l'un de l'autre et sont combinés sur un rouleau commun (24) lors d'une étape de décharge ou immédiatement après une étape de décharge pour donner un non-tissé doublé (1).
  15. Procédé selon la revendication 14, caractérisé en ce que les voiles de carde (50, 52) transférés des rouleaux de formage de voile (22, 23) sont doublés sur un rouleau de décharge (24) prévu en commun pour les deux rouleaux (22, 23).
  16. Procédé selon l'une quelconque des revendications 11 à 15, caractérisé en ce qu'une pluralité de non-tissés (1) sont doublés sur la bande transporteuse commune (4) par une pluralité de cardes (2).
  17. Procédé selon l'une quelconque des revendications 11 à 16, caractérisé en ce que le non-tissé (1) est transporté vers un moyen de liage thermique (14) sur ladite bande transporteuse (4) et en ce que le non-tissé (1) est soumis à une aspiration sur tout son trajet sur la bande transporteuse (4) jusqu'au moyen de liage thermique.
EP96907457A 1995-03-31 1996-03-14 Appareil et dispositif de production de non-tisses Expired - Lifetime EP0817875B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19511904 1995-03-31
DE1995111904 DE19511904B4 (de) 1995-03-31 1995-03-31 Anlage und Verfahren zur Herstellung von Vliesbahnen
PCT/EP1996/001077 WO1996030571A1 (fr) 1995-03-31 1996-03-14 Appareil et dispositif de production de non-tisses

Publications (3)

Publication Number Publication Date
EP0817875A1 EP0817875A1 (fr) 1998-01-14
EP0817875B1 true EP0817875B1 (fr) 2000-07-05
EP0817875B2 EP0817875B2 (fr) 2006-08-16

Family

ID=7758306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96907457A Expired - Lifetime EP0817875B2 (fr) 1995-03-31 1996-03-14 Appareil et dispositif de production de non-tisses

Country Status (3)

Country Link
EP (1) EP0817875B2 (fr)
DE (2) DE19511904B4 (fr)
WO (1) WO1996030571A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6729465B2 (en) 2001-09-25 2004-05-04 Spinnbau Gmbh Plant and a method for transporting textile fabrics
US7003853B2 (en) 2003-07-29 2006-02-28 Spinnbau Gmbh Intermediate card for manufacturing nonwovens of fibrous material as well as method for manufacturing nonwovens of fibrous material

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2879628B1 (fr) 2004-12-16 2007-03-09 Thibeau Soc Par Actions Simpli Procede et dispositif de transport d'un non-tisse, et leur application au transport d'un non-tisse carde ou d'un non-tisse produit par voie aeraulique
DE102010034777A1 (de) 2010-08-18 2012-02-23 Hubert Hergeth Vlieslegemaschine und Verfahren zum Legen eines Vlieses
DE102010034776A1 (de) * 2010-08-18 2012-02-23 Hubert Hergeth Vertikalvliesmaschine
DE102012110975A1 (de) 2012-06-19 2013-12-19 Trützschler GmbH + Co KG Textilmaschinenfabrik Anlage und Verfahren zum Transport von textilen Flächengebilden
US20140155855A1 (en) * 2012-11-30 2014-06-05 Kimberly-Clark Worldwide, Inc. Adjustable Pant-Like Disposable Undergarment With Attachment Assembly Concealing A Line Of Weakness And Method Of Manufacture
DE102015014301A1 (de) 2015-11-06 2017-05-11 Hubert Hergeth Saugsammelband
US11220086B2 (en) 2018-04-13 2022-01-11 Amtex Innovations Llc Stitchbonded, washable nonwoven towels and method for making
US11884899B2 (en) 2018-06-01 2024-01-30 Amtex Innovations Llc Methods of laundering stitchbonded nonwoven towels using a soil release polymer
US10822578B2 (en) 2018-06-01 2020-11-03 Amtex Innovations Llc Methods of washing stitchbonded nonwoven towels using a soil release polymer

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AT324894B (de) † 1973-07-30 1975-09-25 Fehrer Ernst Vorrichtung zum herstellen von faservliesen
US4130915A (en) * 1977-09-19 1978-12-26 Scott Paper Company Carding operation for forming a fibrous structure
DE2830367C2 (de) * 1978-07-11 1985-03-28 Hergeth KG Maschinenfabrik und Apparatebau, 4408 Dülmen Verfahren und Vorrichtung zum Herstellen eines Wirrfaservlieses aus Spinngut, z.B. Wolle, Baumwolle, Chemiefasern u.dgl., mittels eines Krempelvorganges
DE3413629C2 (de) * 1983-05-05 1986-05-07 Ernst Dr. Linz Fehrer Vorrichtung zum Herstellen von Faservliesen
EP0292585B1 (fr) † 1987-05-25 1990-07-18 Carl Schenck Ag Procédé de fabrication d'une nappe de fibres
AT388396B (de) * 1988-01-18 1989-06-12 Fehrer Ernst Vorrichtung zum herstellen eines faservlieses
DE8808971U1 (de) * 1988-07-13 1989-11-09 Hergeth Hollingsworth GmbH, 4408 Dülmen Vorrichtung zum Zusammenführen von Vliesen oder Floren aus Fasern, insbesondere Textilfasern
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DE4128592A1 (de) * 1991-08-28 1993-03-04 Baehre & Greten Verfahren zum kontinuierlichen herstellen eines vlieses aus faserteilchen sowie vorrichtung zur durchfuehrung des verfahrens
AT396791B (de) † 1992-06-26 1993-11-25 Fehrer Ernst Vorrichtung zum herstellen eines vlieses
JPH06116853A (ja) * 1992-10-05 1994-04-26 Kurashiki Seni Kako Kk クロスウェブの製造方法
JP3109630B2 (ja) * 1992-11-06 2000-11-20 チッソ株式会社 不織布の製造方法
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FR2725216B1 (fr) † 1994-09-30 1996-12-20 Thibeau Et Cie A Dispositif pour detacher et transporter a grande vitesse un voile fibreux en sortie de carde

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6729465B2 (en) 2001-09-25 2004-05-04 Spinnbau Gmbh Plant and a method for transporting textile fabrics
US7003853B2 (en) 2003-07-29 2006-02-28 Spinnbau Gmbh Intermediate card for manufacturing nonwovens of fibrous material as well as method for manufacturing nonwovens of fibrous material

Also Published As

Publication number Publication date
DE19511904A1 (de) 1996-10-10
DE69609171T8 (de) 2007-09-13
DE19511904B4 (de) 2006-07-20
EP0817875A1 (fr) 1998-01-14
WO1996030571A1 (fr) 1996-10-03
DE69609171T3 (de) 2007-03-08
EP0817875B2 (fr) 2006-08-16
DE69609171D1 (de) 2000-08-10
DE69609171T2 (de) 2001-03-08

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