EP1790766B1 - Verfahren und Vorrichtung zum Verschieben einer Fasermatte und damit ausgestattete Verfestigungsmaschine, insbesondere eine (Vor-) Vernadelungsmaschine - Google Patents

Verfahren und Vorrichtung zum Verschieben einer Fasermatte und damit ausgestattete Verfestigungsmaschine, insbesondere eine (Vor-) Vernadelungsmaschine Download PDF

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Publication number
EP1790766B1
EP1790766B1 EP06291799A EP06291799A EP1790766B1 EP 1790766 B1 EP1790766 B1 EP 1790766B1 EP 06291799 A EP06291799 A EP 06291799A EP 06291799 A EP06291799 A EP 06291799A EP 1790766 B1 EP1790766 B1 EP 1790766B1
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EP
European Patent Office
Prior art keywords
fleece
machine
jets
orifices
air flow
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EP06291799A
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English (en)
French (fr)
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EP1790766A1 (de
Inventor
Alfred Weiss
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Asselin Thibeau SAS
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Asselin Thibeau SAS
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Publication of EP1790766A1 publication Critical patent/EP1790766A1/de
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • 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
    • D04H18/02—Needling machines with needles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/113—Details of the part distributing the air cushion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/177—Fibrous or compressible material

Definitions

  • the present invention relates to a method for transferring a sheet of fibers, in particular for introducing it into a consolidation machine such as a needling machine, more particularly a pre-needling machine.
  • the present invention also relates to a device for a web transfer.
  • the present invention also relates to a consolidation machine thus equipped, in particular a needling machine or, more particularly, a pre-needling machine.
  • Fiber webs are continuous textile products typically formed from layers of fibers.
  • the fibers are substantially parallel to each other in a direction oblique to the longitudinal direction of the web.
  • the oblique direction of the fibers of a layer forms an angle with the oblique direction of the fibers of each adjacent layer. In general, these oblique directions make an angle of less than 90 ° with the longitudinal direction of the web.
  • Such a textile structure is particularly fragile because the fibers are not bonded to each other, neither inside a layer, nor from one layer to another.
  • the sheet of fibers constitutes an intermediate product which must then pass through at least one consolidation machine connecting the fibers to one another, for example a needling machine whose function is to interlace the fibers and compact the sheet, to produce a consolidated sheet having excellent mechanical strength.
  • the unconsolidated sheet Before consolidation, the unconsolidated sheet is difficult to transfer along a production line, particularly in the interval between the conveyor and the conveyance area where the sheet is in contact with the means of advance of the machine consolidation. These means of advance can only have a pulling effect to advance the sheet. However, given the structure described above for the unconsolidated sheet, the unconsolidated sheet has virtually no tensile strength. It is also impossible to push the ply into the needling because the ply also has no mechanical compressive strength.
  • each conveyor belt bypasses, at the downstream end of the device, no not a rotating cylinder, but a kind of fixed spout whose profile has at its end bypassed by the carpet a radius of curvature chosen as low as possible for a reasonable longevity of the carpet.
  • the GB 1 311 628 discloses a fiber transfer device upstream of a card, by means of an underlying air flow of which at least a part has a movement component in the direction of transfer.
  • the US 2005/123,715 discloses a device for transporting fibers by means of a flow of air produced through a porous body.
  • the object of the present invention is to provide a method and a transfer device simpler and / or more effective for transferring a sheet of fibers, especially for its introduction into the first consolidation machine of a production line.
  • Another object of the present invention is to provide a consolidation machine, in particular a needling machine, and more particularly a pre-needling machine, thus equipped.
  • the method for transferring a sheet of fibers along a transfer path forming an angle with respect to the vertical, for example substantially horizontal, to introduce this sheet of fibers into a consolidation machine such as that a pre-needling or an aiguilleuteuse is characterized in that it is introduced in contact with the underside of the web an underlying airflow of which at least a portion has a movement component in the direction of transfer.
  • an underlying air flow is used which both alleviates or cancels the apparent weight of the sheet, reduces or cancels the friction against a mechanical support, and propels the sheet by friction of the air on the inner face of the web or respectively in the area of the lower layer of the web. It is advantageous to implement the process at the entrance of a needling machine.
  • the air flow according to the invention brings the unconsolidated sheet to the needling path.
  • the solution according to the invention is doubly surprising. On the one hand it turned out that a relatively moderate air flow was sufficient to obtain the expected transfer effect. On the other hand, the person skilled in the art was dissuaded from considering such a solution because usually, in the field of nonwovens, it seeks instead to shelter the textile web from any air flow, a priori likely to scatter the fibers of the tablecloth.
  • the air jets may comprise substantially vertically directed lift air jets, which have the effect of lifting the web, and propulsion jets, oriented obliquely upwards and in the direction of transfer of the web.
  • the propulsion jets have a propulsive effect, in addition to a certain lift effect.
  • the lift air jets act in the vicinity of the upstream end of the transfer zone according to the invention, and the propulsion air jets act further downstream.
  • a slatted conveyor that is to say whose bearing surface intended to support the sheet is defined by a succession of slats which each extend transversely to the slat conveyor. transfer direction.
  • These slats are typically carried by belts that rotate around guide rolls.
  • the method according to the invention makes it possible, especially when the lift air jets are placed upstream, to lift the sheet before it approaches the turn of the slats around a return means, such as a cylinder, of the conveyor to slats. This prevents the lower part of the thickness of the sheet is stretched under the effect of laths which deviate from each other around the turn.
  • a higher air flow is also directed on the upper face of the sheet, substantially opposite the underlying air flow, preferably by giving at least a portion of the upper air flow a movement component in the direction of transfer of the web.
  • the web transfer device is characterized in that it comprises blowing means for introducing, in contact with the lower face of the web, an air flow of which at least a part has a motion component in the direction of transfer.
  • These means may consist of different feed means for different areas of the length of the device, and / or independently adjustable feed means, and / or openings of different geometries or dimensions. There may also be more openings per unit area in some areas than in others.
  • the device prefferably defines for the web an initially ascending and then substantially horizontal path.
  • the initial lifting of the sheet by the lift flow even if it is approximately vertical, can at the same time contribute to the propulsion of the sheet along the upward portion of the path.
  • the orifices from which the air jets emerge open into at least one recess of a surface.
  • at least one recess relative to the direction of transfer, a steep upstream face and a gently sloped downstream face.
  • the recesses are preferably grooves transverse to the direction of transfer. These recesses facilitate the drilling of the orifices during the manufacture of the device. In addition, they have a non-return effect on blow interruptions when the jets are pulsed at a rate related to the punching rate of the needling machine, the blow being interrupted when the needles are engaged in the sheet.
  • the consolidation machine in particular a needling machine, in particular a pre-needling machine, is equipped with a device according to the second aspect.
  • the pre-needling machine 1 constitutes the first machine for consolidating a textile web 17 ( Fig 2 ) exiting for example a spreader-lapper.
  • a part of the exit apron is seen, constituted by a slatted conveyor 18 of the crosslapper.
  • the conveyor 18 conveys the web 17 to the entrance 14 of the pre-acute groomer.
  • the pre-needling machine 1 comprises a needling path 2 which extends in a substantially horizontal plane with a fiber transfer direction which is in the plane of figure 1 .
  • the path 2 is defined on the lower side by a needling table 3 and on the upper side by a stripper 4, both perforated (not shown) for allow the passage of lower needles 5 and upper needles 6, respectively. Only some needles 5 and 6 are shown.
  • the lower needles 5 are fixed to a needle board 7 itself attached to a beam 8, which is actuated vertically back and forth by a connecting rod-crank 9 which one only sees part of the connecting rod.
  • the upper needles 6 are attached to an upper needle board 11, itself attached to a beam 12, operated vertically back and forth by a connecting rod-crank mechanism that is only partially represented.
  • the back and forth movement of the lower needles 5 and the upper needles 6 alternately penetrate the ends of the needles in the needling path 2 and respectively cause said ends of said path 2 to come out, to interlace the fibers of the ply (not represented) arriving by an introduction side 14 to come out in the form of a sheet at least partially consolidated on the extraction side 16.
  • the direction of travel of the sheet along the path is defined by the arrow 27.
  • the ends of the needles are provided with appropriate conformations to drive the fibers with them during the penetration stroke and / or during the withdrawal stroke.
  • a needling machine is called a needling machine in which the number, the distribution, the working stroke and the cadence of the needles, as well as the spacing and the angle of convergence between table 3 and stripper 4 are adapted to confer a first compacting and a first holding at an unbound consolidated web.
  • the figure 1 represents each needle board 7 or 11 in its maximum penetration position and, under the designations 7r and 11r, in its maximum retracted position.
  • the two beams 8 and 12 are mainly represented in the maximum retracted position.
  • the left half of each board is shown in the loose state during assembly or disassembly operations.
  • the slatted conveyor 18 ( Fig 2 ) comprises, as an active element for conveying, transverse slats 19 fixed on at least one continuous belt 20.
  • the belt 20 circulates around guide rolls and drive among which only a downstream return cylinder 21 preceding entry into the needling machine is shown.
  • the figure 2 schematically shows that the upper surfaces of the slats deviate from each other when the slats pass from a rectilinear path preceding the cylinder 21 to a curved path around the cylinder 21.
  • a transfer device 22 is installed under the path of the web 17, between the slatted conveyor 18 and the inlet 14 in the needling 1.
  • the transfer device 22 comprises a transfer table 23 whose upper face 24 which faces the lower face 26 of the ply 17, is a fixed transfer surface, preferably coated with an anti-friction coating such as a polytetrafluoroethylene.
  • the face 24 delimits the lower side of a transfer path 15 of the web 17.
  • the path 15 is inserted between the conveying path 25, upstream, on the slat conveyor 18, and the path of needling 2 located downstream.
  • the transfer surface 24 has, from upstream to downstream relative to the direction of transfer 27 of the fibers, an ascending portion 24a of the transfer path and a substantially horizontal portion 24, which delimit corresponding portions, ascending and respectively horizontal, of the lower zone of the transfer path 15.
  • the table 23 extends at least over the entire width of the sheet.
  • the upward portion 24a is connected, with a suitable operating clearance chosen as low as possible, to a region of the beginning of the descent of the slats 19 around the curvature of the cylinder 21.
  • the downstream end of the portion 24 of the transfer surface 24 is connected almost contiguously with the upper face of the needling table 3.
  • the transfer table 23 forms with a lower box 28 fixed under the table 23 an air storage chamber 29.
  • the chamber 29 is connected to the outlet, shown schematically by the arrow 31, a blower 32 's feeding itself into 33 in the outside atmosphere, if necessary through unrepresented filters.
  • the box 28 is attached to an upstream extension 34 of the needling table 3.
  • the assembly constituted by the box 28 and the table 23 is thus made integral with the frame of the needling.
  • the transfer device 22 may be proposed alone to equip a pre-needling or usual needling, if necessary after disassembly of an introducer device which previously fitted this needling.
  • the transfer device 22 to also be an integral part of a pre-needling device designed from the outset with this introducer device according to the invention.
  • the table 23 is traversed by four rows of air ejection orifices 36, 37, 38, 39. As shown in FIG. figure 3 the rows are oriented along the width of the sheet, and extend over the entire width. The rows are arranged to be substantially equidistant when viewed on the upper face 24 of the table 23. From one row to the other, the orifices 36, 37, 38, 39 are arranged in staggered rows ( figure 3 ). It is thus schematically that the orifices 36, 37, 38, 39 are represented in the same plane with figures 1 and 2 as well as Figures 4 to 6 which will be described later. However, the staggered arrangement is not mandatory and the provision represented schematically in the figure 2 could also be adopted.
  • the orifices 36 to 39 are intended to introduce, between the upper face 24 of the table 23 and the lower face 26 of the sheet, air jets fed by a certain overpressure prevailing in the chamber 29. More particularly, each orifice 36, 37, 38, 39 connects the chamber 29 with the region between the table 23 and the sheet 17, so that the air supplying the chamber 29 from the fan 32 flows in the form of jets 46 to 49 respectively at the outlet of the orifices 36 to 39. These jets combine to form an air flow, a kind of pneumatic bed moving downstream under the ply 17.
  • Each orifice 36 to 39 is a typically cylindrical conduit formed in the mass of the table 23 and opening perpendicularly into the upstream face 56, 57, 58 or 59 respectively of a recess 41 formed in the upper face 24 of the table 23. there is for each row of orifices 36, 37, 38, 39 a groove-shaped recess 41 extending transversely to the transfer direction 17.
  • the orifices 36, 37, 38, 39 all have an inclination from upstream to downstream, while following the orifice of the chamber 29 to the upper face 24 of the table 23, and with respect to the inclination local of this In addition, this inclination is increasing from the row of orifices 36 located furthest upstream to the row of orifices 39 situated furthest downstream.
  • Each groove 41 has a shape of V more or less asymmetrical defined by the upstream face 56, 57, 58 or respectively 59, and a downstream face 42.
  • the upstream faces 58 and 59 are steeper than the associated downstream faces 42, relative to the local orientation of the surface 24.
  • the orifices 36 located upstream are oriented vertically and open through the upward portion 24a of the surface 24. They define levitation jets 46 whose main function is to lift the sheet 17 substantially preventing it from following the part curved path of the slats 19 of the slatted conveyor 18 around the cylinder 21.
  • the orifices 37, 38, 39 are, in this order, more and more inclined downstream and open through the horizontal part 24 of the transfer surface. They define propulsion jets 47, 48, 49, having a component of movement in the direction of transfer 27 of the ply 17, that is to say a component oriented horizontally downstream relative to the direction of transfer of the fibers. . These jets have a dual function of supporting at least partially the weight of the ply 17 and propel the ply 17 by friction between the air jets 47, 48, 49 on the one hand and the fibers making up the lower face of the ply 17 or more concretely the fibers composing the bottom of the thickness of the sheet 17.
  • the orifices 36, 37, 38, 39 have a diameter of 1 mm, and are spaced from each other by 20 mm along their respective rows.
  • the spacing between the successive rows may be of the order of 10 mm.
  • the relative pressure prevailing in the accumulation chamber 29 may be of the order of 20 hPa.
  • the figure 3 represents an alternative embodiment in which shutters 43 are placed against the inner face 44 of the transfer table 23 opposite each row of orifice entries 36, 37, 38 or 39.
  • Each shutter 43 has in the example shown in the form of an elongate and flat drawer 51 extending parallel to the row of orifices. Lights 52 made in each drawer are able to coincide simultaneously with the inputs of all the openings of the row and thus make them communicate with the chamber 29.
  • Each drawer 51 is associated with respective actuating means 53 illustrated very schematically by a double arrow, capable of operating the drawers 51 in back and forth parallel to the row of corresponding orifices to alternately open and close the communication of the chamber 29 with the orifices of the row so as to produce air jets which are no longer continuous but pulsed.
  • shutters 43 It is possible to control the shutters 43 so that all the orifices 36 to 39 are simultaneously open and closed simultaneously.
  • the shutters 43 may also be controlled so that the jets of one row are offset relative to the jets of at least one other row, for example to achieve a kind of peristaltic propulsion of the sheet.
  • At least one row for example the row of orifices 36 forming the levitation jets, to be fed continuously, in which case the corresponding shutter is kept in the open position, or even removed, while at least another row produces pulsed jets.
  • a shutter it is also possible for a shutter to have lights 52 whose pitch is different from that of the orifices of the row, for example an irregular pitch if the pitch of the orifices of the row is regular, so that the pulsed jets of a same row are not produced simultaneously.
  • at least two independently controlled shutters may be provided for this row, each of which is respectively assigned one or more orifices of the row.
  • There may for example be two shutters mounted side by side and each having side teeth selectively hiding the entrance of the corresponding orifices. The teeth of each shutter occupy interdental crenellations of the other shutter.
  • the upper face of the web 17 is guided above the table 23 by a system 61 comprising rotating disks 62 which, along their axis oriented transversely to the web, alternate with fixed guide fingers 63 extending downstream to the inlet 14 in the needling machine 1.
  • the peripheral speed of the discs 62 is preferably slightly greater than that of the web 17.
  • the guiding system 61 is replaced by a second blowing device 64.
  • the second transfer device 64 is symmetrical with the device 22 with respect to the plane of the web 17.
  • the device 64 thus comprises a plate 66, symmetrical with the table 23.
  • air jets 69 escape to the upper face 68 of the web 17.
  • the first air jet 69 is directed vertically downwards, the following, relative to the direction of transfer 27, are further in addition inclined downstream and less and less downward.
  • the web 17 is compressed in the direction of the thickness between the two air flows, lower and respectively higher.
  • the sheet is propelled by friction of air both by contact with its lower face 26 and by contact with its upper face 68.
  • the air jets 69 be less powerful in the vertical direction than the lower air jets 46 to 49.
  • the vertical resultant of the aerodynamic forces is therefore directed upwards, and compensates for at least a portion of the weight of the air. web 17.
  • the friction of the lower face 26 of the web 17 on the table 23 is then reduced or canceled, as in the previous embodiments.
  • the geometry of the orifices 67 is the same as that of the orifices through the table 23.
  • the least vertical power is obtained by a lower pressure in the upper chamber 71 defined between the plate 66 and a box 72 fixed to an extension 73 of the stripper 4.
  • the upper orifices 67 could be more inclined, and / or in smaller numbers, and / or of smaller diameter and / or, in the case of pulsed jets, controlled with shorter or less frequent pulsations.
  • sliding drawers 51 are replaced by rotary drawers 151 each consisting of a shaft rotatably mounted in a respective bore formed in the table 23 parallel to the width of the web 17.
  • the bore passes through the orifices of a row respective of orifices 36 to 39.
  • Each shaft comprises for each orifice of the row, a diametrical duct 152 which coincides with the corresponding orifice, and which thus opens the orifice, in an angular position or a range of angular positions of the 'tree.
  • the shaft closes the orifice in other angular positions of the shaft.
  • the shafts 151 are in continuous rotation (motorization shown schematically by the arrows 153) and can ensure a rate synchronized with the rate of punching needles of the needling machine.
  • the transfer device 82 is placed either directly behind the slatted conveyor 18, but behind a drive device 74 interposed between the slat conveyor 18 and the transfer device 82.
  • the drive device 74 comprises a lower cylinder 76 and an upper cylinder 77, counter-rotating, between which the web 17 is compressed and driven by friction.
  • the transfer device 82 no longer includes a single chamber such as 29 to supply all the orifices but three chambers 86, 88, 89 which respectively feed the jets 46 and 47 on the one hand, 48 on the other hand, and 49 with respect to the chamber 89 .
  • the jets 46 and 47 which contribute most to the lift may be produced with greater pressure if the ply 17 is relatively heavy, or on the contrary with more pressure the jets 48 and 49 if the speed of advance of the web 17 must be relatively fast.
  • the chambers 86, 88 and 89 being of relatively small volume, it is possible to pulse the jet by a solenoid valve or a rotating shutter which would be installed on each of the air supply ducts 87. These can be not connected to the output of a fan, but to a network of compressed air.
  • the airflow could be created through slit-like openings extending parallel to the width of the web, seeking a kind of floatation of the web over an almost laminar flow, rather than dynamic uplift by jets.
  • the invention is applicable to the introduction of a nonwoven web into other textile machines, for example a stretching machine.
  • the invention applies to the transfer of a web following a "substantially horizontal" path, that is to say a path whose orientation normally results in a resistance of the web to advancement, due to gravity and / or inertia and / or friction.
  • a substantially horizontal path that is to say a path whose orientation normally results in a resistance of the web to advancement, due to gravity and / or inertia and / or friction.
  • the invention would be of particular interest if the path was oblique in the ascending direction.
  • connection to a compressed air network is not limited to the realization of the Figure 6 .

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

Claims (32)

  1. Verfahren zur Übergabe eines Faservlieses (17) entlang eines Übergabewegs (15), der einen Winkel bezüglich der Senkrechten bildet, um dieses Faservlies in eine Verfestigungsmaschine (1) wie eine Vor-Vernadelungsmaschine oder eine Vernadelungsmaschine einzuführen, dadurch gekennzeichnet, dass in Kontakt mit der Unterseite (26) des Vlieses (17) ein darunterliegender Luftstrom eingeführt wird, von dem mindestens ein Teil eine Bewegungskomponente in der Übergaberichtung (27) hat.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Strom in Form von Strahlen (46, 47, 48, 49) eingeführt wird.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass mindestens bestimmte Strahlen gepulst sind.
  4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass mindestens bestimmte Luftstrahlen Antriebsluftstrahlen (47, 48, 49) sind, die schräg nach oben und in Übergaberichtung (27) des Vlieses gerichtet sind.
  5. Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass mindestens bestimmte der Luftstrahlen Auftriebluftstrahlen (46) sind, die im Wesentlichen senkrecht gerichtet sind.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es am Ausgang eines Lattenförderers (18) angewendet wird.
  7. Verfahren nach den Ansprüchen 5 und 6, dadurch gekennzeichnet, dass die Auftriebluftstrahlen (46) direkt hinter dem Lattenförderer (18) angeordnet werden, um das Vlies von einem Bereich des Lattenförderers anzuheben, der sich um eine Umlenkeinrichtung (21) krümmt.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass auf die Oberseite (68) des Vlieses (17) ein oberer Luftstrom im Wesentlichen gegenüber dem darunterliegenden Luftstrom gerichtet wird.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass mindestens einem Teil des oberen Luftstroms eine Komponente in der Übergaberichtung (27) des Vlieses (17) verliehen wird.
  10. Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass dem darunterliegenden Luftstrom mehr Leistung als dem oberen Luftstrom in senkrechter Richtung verliehen wird, damit die senkrechte Resultierende der zwei Luftströme mindestens einen Teil des Gewichts des Vlieses ausgleicht.
  11. Vorrichtung zur Vliesübergabe am Eingang einer Verfestigungsmaschine (1), wie einer Vor-Vernadelungsmaschine oder einer Vernadelungsmaschine, dadurch gekennzeichnet, dass sie Blaseinrichtungen aufweist, um in Kontakt mit der Unterseite (26) des Vlieses (17) einen Luftstrom einzuführen, von dem mindestens ein Teil eine Bewegungskomponente in der Übergaberichtung (27) hat.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass die Blaseinrichtungen über die Breite des Vlieses verteilt sind.
  13. Vorrichtung nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass die Blaseinrichtungen über eine bestimmte Länge des Wegs des Vlieses verteilt sind.
  14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass die Blaseinrichtungen bezüglich der Übergaberichtung (27) des Vlieses (17) in einem vorderen Teil der bestimmten Länge stärker nach oben ausgerichtet sind als in einem hinteren Teil der Länge.
  15. Vorrichtung nach Anspruch 13 oder 14, gekennzeichnet durch Einrichtungen zur unterschiedlichen Regelung mindestens eines der Parameter Druck und Durchsatz an verschiedenen Punkten der Länge.
  16. Vorrichtung nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass sie für die Unterseite (26) des Vlieses eine zunächst ansteigende und dann im Wesentlichen waagrechte Strecke begrenzt.
  17. Vorrichtung nach einem der Ansprüche 11 bis 16, dadurch gekennzeichnet, dass die Blaseinrichtungen Ausstoßöffnungen (36 bis 39) aufweisen.
  18. Vorrichtung nach einem der Ansprüche 11 bis 17, dadurch gekennzeichnet, dass mindestens bestimmte der Öffnungen (37 bis 39) ausgerichtet sind, um Luftstrahlen (47 bis 49) zu definieren, die bezüglich der Übergaberichtung (27) des Vlieses (17) nach hinten gehen.
  19. Vorrichtung nach Anspruch 17 oder 18, dadurch gekennzeichnet, dass bestimmte der Öffnungen (36) ausgerichtet sind, um im Wesentlichen senkrechte Luftstrahlen (46) zu definieren.
  20. Vorrichtung nach einem der Ansprüche 17 bis 19, dadurch gekennzeichnet, dass die Öffnungen (36 bis 39) in mindestens einer Aussparung (41) einer Fläche (24) münden, wobei diese Aussparung bezüglich der Übergaberichtung eine steil ansteigende Vorderseite (58, 59) und eine flach ansteigende Rückseite (42) hat.
  21. Vorrichtung nach Anspruch 20, dadurch gekennzeichnet, dass die Aussparungen zur Übergaberichtung quer liegende Rillen sind.
  22. Vorrichtung nach einem der Ansprüche 18 bis 21, dadurch gekennzeichnet, dass die Öffnungen (36 bis 39) versetzt angeordnet sind.
  23. Vorrichtung nach einem der Ansprüche 18 bis 22, dadurch gekennzeichnet, dass die Öffnungen einen Eingang haben, der mit mindestens einer Speicherkammer (29) in Verbindung steht, die mit einer Luftzufuhreinrichtung (32) verbunden ist.
  24. Vorrichtung nach einem der Ansprüche 18 bis 23, dadurch gekennzeichnet, dass sie bewegliche Verschlusseinrichtungen (43, 143) für die Öffnungen aufweist.
  25. Vorrichtung nach einem der Ansprüche 11 bis 23, gekennzeichnet durch Verschlusseinrichtungen, die im Luftweg (87) der Blaseinrichtungen angeordnet sind.
  26. Vorrichtung nach Anspruch 24 oder 25, gekennzeichnet durch Einrichtungen (53, 153) zur Steuerung der Verschlusseinrichtungen (43, 152), um eine gepulste Luftströmung zu erzeugen.
  27. Vorrichtung nach einem der Ansprüche 11 bis 26, dadurch gekennzeichnet, dass sie Blaseinrichtungen (64) auf der Oberseite (68) des Vlieses (17) aufweist, um einen oberen Luftstrom zu erzeugen, von dem mindestens ein Teil eine Bewegungskomponente in der Übergaberichtung (27) des Vlieses (17) hat.
  28. Vorrichtung nach einem der Ansprüche 11 bis 27, dadurch gekennzeichnet, dass sie eine Platte (23) unter dem Weg des Vlieses aufweist.
  29. Vorrichtung nach Anspruch 28, dadurch gekennzeichnet, dass die Platte (23) eine Gleitschicht aufweist.
  30. Verfestigungsmaschine, die einen Vlieseingang aufweist, der mit einer Vorrichtung nach einem der Ansprüche 11 bis 29 ausgestattet ist.
  31. Maschine nach Anspruch 30, dadurch gekennzeichnet, dass die Maschine eine Vernadelungsmaschine ist.
  32. Maschine nach Anspruch 31, dadurch gekennzeichnet, dass die Maschine eine Vor-Vernadelungsmaschine (1) ist.
EP06291799A 2005-11-23 2006-11-22 Verfahren und Vorrichtung zum Verschieben einer Fasermatte und damit ausgestattete Verfestigungsmaschine, insbesondere eine (Vor-) Vernadelungsmaschine Active EP1790766B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0511868A FR2893636B1 (fr) 2005-11-23 2005-11-23 Procede et dispositif pour transferer une nappe de fibres, et machine de consolidation, en particulier (pre-) aiguilleteuse ainsi equipee

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EP1790766B1 true EP1790766B1 (de) 2009-05-06

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AT (1) ATE430826T1 (de)
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FR3026113A1 (fr) * 2014-09-22 2016-03-25 Andritz Asselin Thibeau Dispositif d'aiguilletage comportant une table support ondulee
FR3063742B1 (fr) 2017-03-09 2021-06-18 Andritz Asselin Thibeau Dispositif de transfert et/ou d'introduction d'une nappe de fibres dans une installation de consolidation, notamment une aiguilleteuse
CN109281058B (zh) * 2018-10-19 2020-10-27 中原工学院 一种多层级纤维网及其制备方法

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Publication number Priority date Publication date Assignee Title
AT300620B (de) * 1970-08-13 1972-08-10 Wilhelm Jende Vorrichtung zur Herstellung von Faserbahnen, insbesondere Vliesen
FR2621609B1 (fr) * 1987-10-09 1990-01-19 Asselin Ets Dispositif de transfert et dispositif de compression et d'introduction pour aiguilleteuse
TW508390B (en) * 2001-05-09 2002-11-01 Ind Tech Res Inst Feeding device for preneedling nonwoven fabrics
DE10163683C1 (de) * 2001-12-21 2003-08-14 Mayer Malimo Textilmaschf Verfahren und Anlage zur Herstellung eines mehrschichtigen, vorfixieren Faden-oder Fasergeleges

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FR2893636B1 (fr) 2008-04-18
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FR2893636A1 (fr) 2007-05-25
EP1790766A1 (de) 2007-05-30

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