EP1870499B1 - Cross-lapper - Google Patents

Cross-lapper Download PDF

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Publication number
EP1870499B1
EP1870499B1 EP20070012112 EP07012112A EP1870499B1 EP 1870499 B1 EP1870499 B1 EP 1870499B1 EP 20070012112 EP20070012112 EP 20070012112 EP 07012112 A EP07012112 A EP 07012112A EP 1870499 B1 EP1870499 B1 EP 1870499B1
Authority
EP
European Patent Office
Prior art keywords
belt
fiber composite
fiber
lapper
pressing
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.)
Active
Application number
EP20070012112
Other languages
German (de)
French (fr)
Other versions
EP1870499A2 (en
EP1870499A3 (en
Inventor
Erwin Koch
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
Priority to DE200610028448 priority Critical patent/DE102006028448A1/en
Application filed by Erko Truetzschler GmbH filed Critical Erko Truetzschler GmbH
Publication of EP1870499A2 publication Critical patent/EP1870499A2/en
Publication of EP1870499A3 publication Critical patent/EP1870499A3/en
Application granted granted Critical
Publication of EP1870499B1 publication Critical patent/EP1870499B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01GPRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00Lap-forming devices not integral with machines specified above

Description

  • The invention relates to a stacker according to the preamble of claim 1.
  • Kreuzleger are known from practice. They are used where an initially produced fiber composite, which can be designed, for example, as a pile or as a nonwoven, is to be folded in a space-saving manner. For this purpose, the fiber composite is fed by means of an infeed belt to the stacker, which extends transversely to this inlet belt another conveyor belt. The cross stacker places the fiber composite on this conveyor belt. In this case, there is a relative movement between the stacker and the conveyor belt, so that continuously, while the conveyor belt is running, the fiber composite is zigzag-like stored on the conveyor belt. The known cross-stackers can be configured as a trolley or as a repeater.
  • It is known from practice to introduce the fed by a carding fiber composite loosely on the infeed belt resting in the crosslapper. With increasingly higher belt speeds, the problem increasingly arises that undesirable wrinkling can occur, in particular, where the fiber composite is deflected. To meet that It is known to push out the air trapped in the fleece or pile from the fiber composite. For this purpose, resting or adjustable rollers are provided, which may have smooth or perforated surfaces and which press out trapped air from the fiber composite.
  • On the way through the infeed belt to the first deflection point of the cross stacker, however, the restoring forces of the fibers cause them to rise again from their initially compressed orientation so that the fiber composite "recovers" from the compressive stress and takes in air again. This air entrapment as well as the centrifugal forces acting on the fiber composite at the deflection point cause the fabric of the fiber composite to set up at the first deflection point, so that the undesired formation of bubbles or wrinkles occurs. If uncontrolled distortions of the fiber composite then occur, the weak, very loose cohesion of the batt or fiber fleece can be destroyed and the fiber composite torn.
  • From the EP 1 136 600 A1 is known a crosslapper, which can be referred to with its horizontal depositing device as a so-called Flachtäfler. The fiber composite is transported between an infeed belt and a cover strip up to a first deflection point in order to be able to transport and stretch the fiber composite in this way. The design of the cover is not explained in detail.
  • From the DE 102 50 089 A1 For example, a cross-stacker is known which does not have a horizontal laying device such as a flat saw, but is designed as a low-arm leveler, with an upwardly directed feed arm, a hinge, and a down-facing laying arm. From the lower end of the laying arm, the fiber composite is deposited on a draw-off belt, wherein the articulated configuration of the steep-arm Fleece layer allows a constantly oscillating back-and-forth movement to the fiber composite over place the desired width on the draw-off belt. In the aforementioned pendulum motion, the supply and laying arms are pivoted in alternately different directions to each other about the said joint. In order to avoid stretching and buckling of the fiber composite during this oscillating movement, three alternative embodiments of the steep-arm nonwoven layer are proposed in order to securely hold the fiber composite to the belt and to prevent relative movements between the fiber composite and the belt conveyor belt:
  1. 1. The fiber composite is guided between a pile conveyor belt and a pressure belt. The design of the two bands is not explained in detail.
  2. 2. On both arms of the steep-arm fleece layer, the pile conveyor belt is designed as a screen belt, which is vacuumed on the back, so that it is possible to dispense with a pressure belt.
  3. 3. The fiber composite is guided between a smooth base and a pressure belt. The smooth surface is curved, so that the pressure belt is held in secure contact with the surface and the fiber composite accordingly performed safe, namely is clamped. The design of the pressure belt is not explained in detail.
  • From the DE 195 43 623 A1 a generic crosslapper is known in which the pile is guided between two conveyor belts. While the lower conveyor belt is transporting the pile, the upper conveyor belt runs obliquely toward it, so that the two conveyor belts form a wedge-shaped inlet section for the pile. Due to the gradually decreasing distance between the two conveyor belts sufficient time should be provided so that the Flor entrained, excess air can escape before the first deflection. Due to the wedge-shaped decreasing height of the inlet section, the air is forced to sweep over the pile in the opposite direction to the transport direction or transversely to become flatter from the wedge-shaped be flowing outflow tract. In this case, impairments of the loosely connected pile can not be ruled out.
  • The invention has for its object to improve a generic crosslapper to the effect that this ensures the gentlest possible and controlled handling of the fiber composite and prevents the formation of bubbles or wrinkles at the first deflection as reliable as possible.
  • This object is achieved by a stacker with the features of claim 1.
  • In other words, the invention proposes that the air is pressed out of the fiber composite in a controlled manner by the cover band guiding the fiber composite under pressure. This venting takes place until the fiber composite reaches the first deflection, so that the time required for a recovery of the fiber composite due to the restoring forces of the individual fibers, the fiber composite is not available.
  • When using a closed masking tape, the problem could exist that the air trapped between the infeed belt and the cover strip forces the fiber composite apart and destroys the structure of the fiber composite required for correct placement of the fiber composite. According to the proposal, it is therefore provided that the masking tape reliably enables the venting of the fiber composite by allowing an air transport leading away from the fiber composite through the cover tape. It may be provided for this purpose with air channels that allow a leading away from the fiber composite air transport through the masking tape. For thicker Abdeckbändem the air transport can be done, for example, within the cover, for example, to lateral outlet openings.
  • In contrast to a closed masking tape is thus ensured that the air escaping from the fiber composite does not lead to damage to the fiber composite, z. B. by the fibers are separated by the air, which escapes between two closed transport and Abdeckbändern. In particular, a closed conveyor belt and a venting possible, z. B. perforated masking tape may be provided. The incoming from the carding batt may, as proposed, go through the dynamic movements of the designed as a wagon or as a repeater Kreuzlegers unchanged, so without unwanted compression, stretching or wrinkling.
  • The fiber composite is according to the proposal still vented immediately before the first deflection, so that caused by the air entrapment such as blistering or wrinkling can not occur and accordingly the fiber composite can be deflected undisturbed. Since the fiber composite is covered by a masking tape, the vent can easily be flat and over a longer distance of the fiber composite during its transport on the infeed belt, and not just linear as by means of a pressure roller.
  • The masking tape can be provided on a merely comparatively short path before the first deflection point, if this is sufficient for the desired ventilation of the fiber composite to easily lead this around the first deflection to be able to. Alternatively, it can be provided to cover the fiber composite over a long distance with a masking tape, so that particularly high belt speeds are possible without destroying the fiber composite by air turbulence, so that the fiber composite optimally protected between a conveyor belt - like the infeed belt - and the masking tape out is.
  • In accordance with a particularly preferred embodiment of the present proposal, at the first deflection point, the cover strip can assist deflection of the fiber composite that is as gentle as possible on the material by the cover strip either following the first deflection point over part of its circumference. Alternatively or in addition to this, it can be repeatedly guided to the first deflection point, for example several times to the circumference of a deflection roller, for example by means of a plurality of deflection rollers. By this supporting system of the cover not only the support of the fiber composite is improved at the first deflection, but by the system pressure is also maintained before the beneficial ventilation of the fiber composite maintained.
  • In addition, it may be advantageous to cover the fiber composite not only up to and at the first deflection point, but on its way through the stacker over large sections of the path or even as completely as possible. For this purpose, in addition to the aforementioned masking tape, which is associated with the infeed belt, the arrangement of one or more further masking tapes and / or pressure rollers may be provided.
  • In order to allow intensive ventilation and to avoid the entry of external air in the fiber composite, not only these other masking tapes may have corresponding air channels, for example, designed as a screen belts, but also the pressure rollers may have air channels, for example, be perforated.
  • Particularly simple, with the shortest possible flow paths for the air particularly effective for ventilation, the desired pressure forces on the fiber composite enabling and economically producible cover band can be advantageously designed as a wire, ie with air channels that extend across the surface of the cover strip and only so long how the masking tape is thick. As a result, it is reliably ensured that effective ventilation is possible even with high-speed belts and that both the air contained in the fiber composite itself and between the two belts, namely the infeed belt and the cover belt, can be removed.
  • In a voluminous fiber composite may be provided to achieve higher contact forces, make the cover strip obliquely against the inlet belt, so that the fiber composite is guided in a wedge-shaped gap between the inlet belt and masking tape and is continuously vented more.
  • In this case, it is advantageous to provide an angling of the infeed belt in its region near the first deflection point, in order to permit the inclined guidance of the cover belt by means of deflecting rollers and the like without any problems.
  • By adjusting the speed of the cover strip in comparison to the speed of the conveyor belt - such. B. of the infeed belt - can be caused within the Kreuzlegers a deliberate compression or stretching of the fiber composite, depending on the material quality of the fiber composite and the individual structural conditions of the Kreuzlegers, so that an optimal treatment of the fiber composite to achieve a desired, present at the end of the Kreuzlegers Material quality of the fiber composite is made possible.
  • The invention will be explained in more detail below with reference to the purely schematic illustrations. The show
    Fig. 1-3 different embodiments of Kreuzlegern.
  • In the drawings, a stacker is generally designated by 1, wherein a fiber composite 2 is fed as a ribbon-shaped sheet from a card as a nonwoven or batt to the cross stacker 1. In the region of a first pressure roller 3, the direction of movement of the fiber composite 2 is deflected and at the same time air is forced out of the fiber composite. Subsequently, the fiber composite 2 passes via an infeed conveyor 4 to a first deflection point 5 of the crosslapper 1. The first deflection point 5 upstream and zooming to this first deflection point 5 a designed as a screen cover band 6 is provided which the ventilation of the fiber composite 2 to the deflection point. 5 ensures.
  • In the embodiments of the Fig. 1 and 3 the masking tape 6 extends adjacent to the fiber composite 2 nearly from the first pressure roller 3 to the first deflection point 5.
  • In the embodiment of the Fig. 2 is the infeed belt 4 angled in front of the first deflection point 5, so that the cover strip 6 in this last, angled portion of the inlet belt 4 before the first deflection 5 the infeed belt 4 can be supplied wedge-shaped and causes a steadily decreasing gap, in which the fiber composite. 2 is guided in, so that the fiber composite 2 is continuously vented more strongly within this gap until it reaches the first deflection point 5.
  • Due to the angling of the infeed belt 4, there is sufficient space above the horizontally extending section of the infeed belt 4 to guide the cover belt 6 over deflecting rollers 7 so that it can approach this infeed belt 4 at an angle and with an ever smaller distance in the angled region of the infeed belt 4 ,
  • Also in the area of the first deflection point 5 itself is provided in the illustrated embodiments, the fiber composite 2 to vent and occurring at these deflection 5 centrifugal forces acting on the fiber composite 2, counteract, so that the composite of the individual fibers within the fiber composite 2 as undisturbed remains and the formation of bubbles or wrinkles in the region of the first deflection point 5 is reliably avoided. For this purpose, pressure rollers 8 are provided, which also serve as deflection rollers to guide the cover strip 6 and a possibly further, lower cover strip 9.
  • The region of the first deflection point 5 is in the embodiment of Fig. 1 The fiber composite 2 runs from this first deflection point 5 to a storage location 10, which, as can be seen from the arrows, is also mounted reciprocally movable, so that they are the fiber composite 2 can place on a conveyor belt, which transverse to the inlet belt 4 and transverse to the plane of the paper Fig. 1 runs, so that the fiber composite 2 is folded zigzag folded on this conveyor belt, not shown in the drawings. Since this second storage location 10 always leads and lags constantly in comparison to the speed of the infeed belt 4, the lateral mobility of the first deflection point 5 serves to prevent otherwise occurring loosening or tensile stresses in the fiber composite 2 due to this advance and lagging of the storage location.
  • In the area of the storage location 10 of the fiber composite 2 is deflected once again and by the leadership of the inlet belt 4 and one of the three representations apparent further masking tape 9 of the fiber composite 2 is also vented between the first deflection point 5 and the deposition point 10, since the two corresponding bands 4 and 9 lead the fiber composite 2 between them, so that the fiber composite 2 is guided almost covered on its entire way through the stacker 1.
  • In addition, pulleys 11 can be arranged in the region of this storage location 10 so that they cause there as a pressure rollers there is a venting of the fiber composite 2, where the fiber composite is guided in a curve.
  • Claims (8)

    1. A cross-lapper (1) constructed as a carriage laying apparatus or conveyor belt laying apparatus for a fiber structure (2) formed as fiber fleece or fiber gauze,
      with a conducting belt (4), which transports the fiber structure (2) to an initial turning location (5),
      and a covering belt (6), which
      ● runs adjacent to the fiber structure (2),
      ● is provided in the delivery direction of the conducting belt (4) before the first turning location (5),
      ● lies against the fiber structure (2) up to the first turning location (5), and
      ● is arranged in such a manner that the fiber structure (2) is conducted under pressure between the conducting belt (4) and the covering belt (6),
      characterized in that
      the covering belt (6) is provided with air channels in such a manner that makers air transport leading away from the fiber structure (2) through the covering belt (6) possible.
    2. The cross-lapper according to claim 1, characterized in that the covering belt (6) is driven with a speed different from that of the conducting belt (4), in such a manner that the fiber structure (2) is stretched or compacted.
    3. The cross-lapper according to claim 1 or 2, characterized in that the first turning location (5) is also provided with pressing elements, which lie against the fiber structure (2), exerting pressure onto the fiber structure (2).
    4. The cross-lapper according to claim 3, characterized in that the pressing elements are constructed in the form of pressing rolls (8).
    5. The cross-lapper according to claim 3 or 4, characterized in that the pressing elements are constructed to be porous to air.
    6. The cross-lapper according to claim 3, characterized in that the pressing elements are formed by the covering belt (6), which is led around a portion of the circumference of the first turning location (5).
    7. The cross-lapper according to claim 3, characterized in that the pressing elements are formed by the covering belt (6), which is redirected multiple times and is led multiple times to the first turning location (5).
    8. The cross-lapper according to one of the previous claims, characterized in that the covering belt (6) is constructed as a sieve belt.
    EP20070012112 2006-06-21 2007-06-21 Cross-lapper Active EP1870499B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    DE200610028448 DE102006028448A1 (en) 2006-06-21 2006-06-21 stacker

    Publications (3)

    Publication Number Publication Date
    EP1870499A2 EP1870499A2 (en) 2007-12-26
    EP1870499A3 EP1870499A3 (en) 2008-06-18
    EP1870499B1 true EP1870499B1 (en) 2010-07-28

    Family

    ID=38582126

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP20070012112 Active EP1870499B1 (en) 2006-06-21 2007-06-21 Cross-lapper

    Country Status (3)

    Country Link
    EP (1) EP1870499B1 (en)
    AT (1) AT475729T (en)
    DE (2) DE102006028448A1 (en)

    Cited By (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102010050029A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh stacker
    DE102010050027A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh stacker
    DE102010050028A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh The nonwoven laying
    EP2479321A1 (en) 2011-01-19 2012-07-25 Oskar Dilo Maschinenfabrik KG Fibrous web laying device
    DE102012019363A1 (en) 2012-10-02 2014-04-03 Trützschler GmbH & Co Kommanditgesellschaft Cross-stacker and method for operating a cross-stacker
    EP3015578A1 (en) 2014-10-27 2016-05-04 Oskar Dilo Maschinenfabrik KG Fibrous web laying device
    EP3150753A1 (en) 2015-09-30 2017-04-05 Oskar Dilo Maschinenfabrik KG Device for conveying a gauze sheet or a non-woven fabric

    Families Citing this family (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102013101398B4 (en) * 2013-02-13 2015-10-29 Trützschler GmbH & Co Kommanditgesellschaft Apparatus and method for influencing the basis weight profile of a batt
    DE102013105249B3 (en) * 2013-05-23 2014-11-20 TRüTZSCHLER GMBH & CO. KG stacker
    US9814176B2 (en) 2014-11-26 2017-11-14 Cnh Industrial Canada, Ltd. Belted seed transfer mechanism
    FR3063741A1 (en) * 2017-03-09 2018-09-14 Andritz Asselin Thibeau Flatness

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE3125946A1 (en) * 1981-07-01 1983-01-20 Dilo Kg Maschf Oskar "florleger"
    DE19543623A1 (en) * 1995-11-23 1997-05-28 Hergeth Hollingsworth Gmbh I K Carded web laying assembly
    DE29518587U1 (en) * 1995-11-23 1997-04-10 Autefa Maschinenfab Fleece layer
    EP1136600A1 (en) * 2000-03-13 2001-09-26 Automatex S.r.l. Lap-forming apparatus for card webs
    DE10250089B4 (en) * 2002-10-25 2014-02-13 Oskar Dilo Maschinenfabrik Kg Steilarm-fleece layer and apparatus for producing a cross-laid fiber fleece
    DE202005006840U1 (en) * 2005-04-27 2006-08-31 Oskar Dilo Maschinenfabrik Kg lapper

    Cited By (12)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102010050029A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh stacker
    DE102010050027A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh stacker
    DE102010050028A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh The nonwoven laying
    WO2012059271A1 (en) 2010-11-02 2012-05-10 Trützschler Nonwovens Gmbh Cross-lapper
    WO2012059273A1 (en) 2010-11-02 2012-05-10 Trützschler Nonwovens Gmbh Nonwoven web laying device and method for forming a nonwoven fabric
    WO2012059272A1 (en) 2010-11-02 2012-05-10 Trützschler Nonwovens Gmbh Cross-lapper
    EP2479321A1 (en) 2011-01-19 2012-07-25 Oskar Dilo Maschinenfabrik KG Fibrous web laying device
    DE102012019363A1 (en) 2012-10-02 2014-04-03 Trützschler GmbH & Co Kommanditgesellschaft Cross-stacker and method for operating a cross-stacker
    EP2716801A2 (en) 2012-10-02 2014-04-09 Trützschler GmbH & Co. KG Stacker and method for operating a stacker
    EP3015578A1 (en) 2014-10-27 2016-05-04 Oskar Dilo Maschinenfabrik KG Fibrous web laying device
    EP3015577A1 (en) 2014-10-27 2016-05-04 Oskar Dilo Maschinenfabrik KG Fibrous web laying device
    EP3150753A1 (en) 2015-09-30 2017-04-05 Oskar Dilo Maschinenfabrik KG Device for conveying a gauze sheet or a non-woven fabric

    Also Published As

    Publication number Publication date
    EP1870499A3 (en) 2008-06-18
    DE102006028448A1 (en) 2007-12-27
    DE502007004536D1 (en) 2010-09-09
    AT475729T (en) 2010-08-15
    EP1870499A2 (en) 2007-12-26

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