EP1386986B1 - Dispositif pour détacher un voile de carde avec un rouleau aspirant - Google Patents

Dispositif pour détacher un voile de carde avec un rouleau aspirant Download PDF

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Publication number
EP1386986B1
EP1386986B1 EP20030008243 EP03008243A EP1386986B1 EP 1386986 B1 EP1386986 B1 EP 1386986B1 EP 20030008243 EP20030008243 EP 20030008243 EP 03008243 A EP03008243 A EP 03008243A EP 1386986 B1 EP1386986 B1 EP 1386986B1
Authority
EP
European Patent Office
Prior art keywords
suction
roller
belt
fibers
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
EP20030008243
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German (de)
English (en)
Other versions
EP1386986A1 (fr
Inventor
Erwin Kock
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
Erko Truetzschler 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 Erko Truetzschler GmbH filed Critical Erko Truetzschler GmbH
Publication of EP1386986A1 publication Critical patent/EP1386986A1/fr
Application granted granted Critical
Publication of EP1386986B1 publication Critical patent/EP1386986B1/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
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • Such a device is known from EP 0 704 561 B1.
  • the suction device is designed as a suction shaft, which acts in the region on the fibers, in which they are transferred from the take-off roll to the conveyor belt.
  • fast-moving conveyor belt is a subsequent impairment of resting on the conveyor belt fibers, z.
  • air turbulence not excluded, so that the cohesion of the fibers can be disturbed, especially on fast moving bands.
  • a generic arrangement is also known from GB 962 162 A, with an evacuated draw-off roller, and in which the removal of the fibers from the card is assisted by an air jet which is directed between the fibers and the card surface.
  • US Pat. No. 4,475,272 A shows an arrangement in which the removal of the fibers does not take place by means of a suction-supported take-off roll, but in which the fibers are exclusively sucked off.
  • An increase in volume ded fiber web or batt is barely avoidable due to the required, relatively strong suction. This increase in volume affects the cohesion of the fibers and makes them particularly sensitive to influences such.
  • air turbulence which act on the fibers in the subsequent transport on a - especially on a fast-running - conveyor belt.
  • US 5 361 451 A shows an arrangement in which the fibers pass from a card in free flight to an air-permeable, evacuated conveyor belt.
  • an evacuated roll Above the conveyor belt is an evacuated roll is provided which forms a baffle or baffle for the free-flying fibers and which rotates in a direction opposite to the carding direction.
  • two suction zones below the conveyor belt and within the roller of the fibers transporting air stream is fanned into two streams, which should result in a particularly voluminous fiber structure on the conveyor belt.
  • this increase in volume affects the cohesion of the fibers and makes them particularly sensitive to influences such.
  • air turbulence which act on the fibers in the subsequent transport on a - especially on a fast-running - conveyor belt.
  • a suction roll arrangement for the press of a pulp drying machine is known.
  • a moisture-laden cellulosic web is first passed between a press felt and a wire and then held by a suction roll on the press felt.
  • Suction chambers in the suction roll help to remove moisture from the pulp web. The problem as it occurs with freely moving fibers or a very loose, sensitive fiber composite, is not addressed here.
  • the invention has for its object to improve a generic device to the effect that they favor with simple means to different production conditions an optimal transfer of the fibers is adjustable and customizable. .
  • the invention proposes to favor the transfer in a manner known per se by means of a negative pressure applied to the pile delivery belt.
  • the suction effect is made possible by a suction roll, around which the pile delivery belt rotates.
  • the suction effect can be influenced by the fact that a gap or slot nozzle provided within the suction roll is adjustable, so that they can be adjusted to different conditions Circumferential areas of the suction roller can act.
  • the transfer from the take-off roll to the pile delivery belt can be optimally influenced by means of the suction roll.
  • a homogenization of the suction effect is achieved in that, in addition to the gap or slot nozzle, a second suction region is provided on the suction roll, which acts in a larger compared to the nozzle peripheral portion of the suction roll.
  • the two suction regions can be adjusted independently of each other, so that the most varied flow or vacuum conditions are adjustable, which act on the fibers to be transferred.
  • the fiber transition and in particular the deposit on the pile delivery belt in the peripheral region of the suction roll instead, so controlled in the area in which the negative pressure acts, so that optimal fiber deposition can be supported on the pile delivery belt.
  • the suction or negative pressure effect is supported by an air accumulation or overpressure effect, which facilitates the detachment of the fibers from the take-off roll.
  • an air accumulation in the conveying direction of the fibers behind the take-off roll is generated by means of an auxiliary roll which rotates in the same direction with the take-off roll.
  • a possible undisturbed acquisition of the nonwoven fabric on the pile delivery belt can be promoted in particular by the fact that the pile delivery belt runs slightly faster than the peripheral speed of the take-off roller corresponds. In this way, a jamming of material or a compression of the nonwoven fabric is avoided and in a conventional manner, as is known by different peripheral speeds of the carding machine and the take-off roll, produces a smoothest possible fiber layer on the pile delivery belt.
  • the pile delivery belt can be followed by an accumulation belt as a further conveying device, wherein for the transfer of the fibers between the two belts a suction roller is provided, which is formed absorbent only on a part of its circumference.
  • 1 as a whole denotes a device which serves for the production of fiber webs. From a carding machine 2, which conveys fibers 3 in the counterclockwise direction, the fibers 3 are removed by a take-off roll 4, and from the take-off roll 4 the fibers 3 reach a pile delivery belt 5.
  • the pile delivery belt 5 runs around a total of three rolls, the take-off roll 4 being provided next to a suction roll 6 which has an air-permeable surface, just as the pile delivery belt 5 is made permeable to air. More than the three exemplified rolls can deviate be provided by the illustrated embodiment to z. B. to ensure a particularly reliable guidance of the pile delivery belt 5.
  • the suction roll 6 has a slit nozzle 7 which is rotatably adjustable, so that the air-permeable periphery of the suction roll 6 moves together with the pile delivery belt 5, while the slotted nozzle 7, in contrast, stops rotation and their suction unfolds at a fixed, predetermined location.
  • the slotted nozzle 7 can be adjusted to adjust the position of the negative pressure range zugronnen.
  • the suction effect of the slit nozzle 7 can also be influenced by means known per se, for example by influencing the blower output of a suction fan, sliders more or less inserted into the extraction duct or the like.
  • the fibers 3 pass from the take-off roll 4 to the pile delivery belt 5 in the region in which this rotates about the suction roll 6, ie in the bent region of this delivery belt 5.
  • the split nozzle 7 effects or assists the transition of the fibers 3 from the Take-off roller 4 on the pile delivery belt 5 and in particular supports the detachment of the fibers 3 from the take-off roll 4.
  • a subsequent second suction region of the suction roll 6 ensures optimal conditioning of the fibers 3 on the pile delivery belt 5.
  • a second suction region is provided in the direction of rotation of the suction roller 6 behind the slit nozzle 7, which constitutes about 1/4 to 1/3 of the circumference of the suction roller 6 and is indicated purely schematically by 8.
  • the influence of the fibers in the conveying direction behind the slit nozzle 7 is effected not only by the second suction region 8, but also by an air cushion, which is constructed downstream of the take-off roll 4 in the conveying direction.
  • an auxiliary roll 9 is provided, which rotates in the same direction with the take-off roll 4, so that the adjacent surfaces of these two rolls meet in opposite directions. The circumferentially entrained by the auxiliary roll 9 air flow promotes the detachment of the fibers 3 of the take-off roll. 4
  • the device 1 is further developed to the effect that an accumulation belt 10 is provided, which conveys the pile delivery belt 5 as well as possibly further pile delivery belts.
  • the transfer of the fibers 3 from the pile delivery belt 5 onto the collecting belt 10 is promoted by a suction roller designated as transfer roller 11, which is absorbent only in a region 12 whose lateral boundaries are shown in FIG. 2 drawn through lines.

Landscapes

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

Claims (7)

  1. Dispositif (1) pour récupérer un feutre de fibres sur une carde (2),
    avec un cylindre de retrait (4) monté en aval de la carde (2),
    et avec un ruban de dépose de voile (5) laissant passer l'air, qui est monté en aval du cylindre de retrait (4),
    un dispositif d'aspiration étant prévu sous le ruban de dépose de voile (5), autrement dit sur le côté opposé au cylindre de retrait (4),
    caractérisé en ce que le dispositif d'aspiration est formé par un cylindre d'aspiration (6) qui possède une buse fendue ou entrouverte (7) relativement large, débouchant parallèlement à son axe à la surface du cylindre, qui forme une première zone d'aspiration, ainsi qu'une deuxième zone d'aspiration (8) plus grande que celle-ci, qui s'étend sur une plus grande partie de la circonférence du cylindre d'aspiration (6) que la buse fendue ou entrouverte (7).
  2. Dispositif selon la revendication 1, caractérisé en ce que la puissance d'aspiration de la deuxième zone d'aspiration (8) est réglable indépendamment de la première zone d'aspiration.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la deuxième zone d'aspiration (8) représente entre le quart et le tiers environ de la circonférence du cylindre.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un cylindre auxiliaire (9) qui est disposé, dans le sens de transport des fibres (3), derrière le cylindre de retrait (4) et tourne dans le même sens que celui-ci, l'écartement entre le cylindre de retrait (4) et le cylindre auxiliaire (9) étant dimensionné de façon à former entre eux un coussin d'air qui favorise le détachement des fibres (3) du cylindre de retrait (4).
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la zone de transfert dans laquelle les fibres (3) parviennent sur le ruban de dépose de voile (5) est prévue sur la circonférence du cylindre d'aspiration (4).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le ruban de dépose de voile (5) tourne légèrement, environ 10 %, plus vite que la vitesse périphérique du cylindre de retrait (4).
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il comporte un ruban collecteur (10) monté en amont du ruban de dépose de voile (5), un cylindre d'aspiration (11) qui est capable d'aspiration seulement sur une partie de sa circonférence étant prévu entre ces deux rubans.
EP20030008243 2002-07-31 2003-04-09 Dispositif pour détacher un voile de carde avec un rouleau aspirant Expired - Lifetime EP1386986B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10234803 2002-07-31
DE2002134803 DE10234803A1 (de) 2002-07-31 2002-07-31 Vorrichtung zur Abnahme eines Faservlieses von einer Karde, mit einer Absaugwalze

Publications (2)

Publication Number Publication Date
EP1386986A1 EP1386986A1 (fr) 2004-02-04
EP1386986B1 true EP1386986B1 (fr) 2007-05-16

Family

ID=30010518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030008243 Expired - Lifetime EP1386986B1 (fr) 2002-07-31 2003-04-09 Dispositif pour détacher un voile de carde avec un rouleau aspirant

Country Status (2)

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EP (1) EP1386986B1 (fr)
DE (2) DE10234803A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2286577T3 (es) * 2004-04-22 2007-12-01 Asselin-Thibeau Maquina de cardar con un organo de transferencia rotativo aspirante.
ITTO20040115U1 (it) * 2004-09-24 2004-12-24 Fincarde S P A Sistema per il trasferimento di un velo di fibre proveniente da una carda.
FR3059344B1 (fr) * 2016-11-25 2019-11-22 Andritz Asselin Thibeau Dispositif d'etirage d'un voile dispose entre un dispositif de carde et un etaleur nappeur

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962162A (en) * 1960-08-03 1964-07-01 Birfield Eng Ltd Improvements in or relating to carding engines
DE2200870C3 (de) * 1971-02-11 1979-08-02 Veb Spinnereimaschinenbau Karl-Marx- Stadt, Ddr 9000 Karl-Marx-Stadt Vorrichtung zur pneumatischen Fasergutspeisung von mehreren Spinnmaschinen oder einzelnen Arbeitsstellen, mindestens einer solchen
US3787930A (en) * 1971-08-12 1974-01-29 Kendall & Co Process for randomizing card webs
US4475272A (en) * 1983-02-07 1984-10-09 Rando Machine Company Sliver forming condenser
AT396791B (de) * 1992-06-26 1993-11-25 Fehrer Ernst Vorrichtung zum herstellen eines vlieses
AT397516B (de) * 1992-12-23 1994-04-25 Fehrer Ernst Vorrichtung zum herstellen eines faservlieses
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
FR2732042B1 (fr) * 1995-03-22 1997-06-13 Thibeau & Cie Sa A Cylindre aspirant permettant le transfert d'un voile fibreux entre un tapis de transport et deux cylindres de calandrage
DE19535876A1 (de) * 1995-09-27 1997-04-03 Hollingsworth Gmbh Anlage und Verfahren für die Vliesherstellung aus Fasermaterial
FI106640B (fi) * 1997-12-15 2001-03-15 Valmet Corp Sellun kuivatuskoneen puristimen imutelajärjestely sekä vastaava menetelmä

Also Published As

Publication number Publication date
DE50307279D1 (de) 2007-06-28
DE10234803A1 (de) 2004-02-12
EP1386986A1 (fr) 2004-02-04

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