EP1367165A1 - Suction roller for processing a sheet of textile fibres or an equivalent product - Google Patents

Suction roller for processing a sheet of textile fibres or an equivalent product Download PDF

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Publication number
EP1367165A1
EP1367165A1 EP03291165A EP03291165A EP1367165A1 EP 1367165 A1 EP1367165 A1 EP 1367165A1 EP 03291165 A EP03291165 A EP 03291165A EP 03291165 A EP03291165 A EP 03291165A EP 1367165 A1 EP1367165 A1 EP 1367165A1
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EP
European Patent Office
Prior art keywords
suction
roller
roller according
zone
veil
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.)
Granted
Application number
EP03291165A
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German (de)
French (fr)
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EP1367165B1 (en
Inventor
François LOUIS
Bernard Chatelet
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.)
Asselin Thibeau SAS
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Asselin SA
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Publication of EP1367165B1 publication Critical patent/EP1367165B1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • 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
    • 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
    • D04H1/74—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 orientated, e.g. in parallel (anisotropic fleeces)

Definitions

  • the present invention relates to a suction roller for treatment a veil of textile fibers or equivalent product, if necessary, denser and / or thick like a tablecloth, a ribbon etc.
  • Document FR 1,500,746 describes a suction cylinder used for entrain a veil of textile fibers then detach it, for example a veil carded at the end of the comber, or to redistribute a veil in a spreader-lapper.
  • the suction cylinder described is hollow with a cylindrical wall perforated or made breathable. It has a suction sector delimited by partitions and which is put in depression. According to an example described, the suction is done via a coaxial perforated tube or not with suction at both ends, the perforations of the tube being distributed and / or of such dimensions that a uniform suction is over the entire length of the tube.
  • two symmetrically mounted suction rollers are used to pick up and fold a veil in a movable exit carriage moved back and forth at above an apron for receiving the folded veil arranged perpendicularly.
  • These two suction rollers are connected alternately to the means producing the suction, the veil guided between the two rollers being alternately drawn by one or the other of the rollers according to the direction of moving the moving carriage.
  • Document EP 0 733 729 discloses a suction roller used for transfer a fibrous web between the conveyor belt and two calendering cylinders, thereby reducing the stretching of the web and to avoid floating problems.
  • the suction cylinder is interposed on the path of the web between the conveyor belt and the two cylinders of calendering.
  • the veil is pressed by suction on the surface of said cylinder and is held there by suction to a pre-calendering area located between the suction cylinder and the lower calendering cylinder.
  • the suction cylinder is made for example from a perforated metal sheet. It has a suction sector delimited by partitions whose angular positioning is adjustable.
  • Document FR 2 612 949 discloses a device for consolidating a textile fleece or equivalent in which the veil is passed through the slot formed by at least two juxtaposed rollers, applying pressure.
  • the two rollers are hollow, their peripheral surface being perforated or screened.
  • the exhaust air produced during the compression of the web can be done radially by penetrating inside the two rollers perforated.
  • the perforated rollers can be subjected to the action of an aspiration.
  • the authors recommend that the diameter of the perforations equal to or less than the depth of the perforations, so that the fibers are not entrained through the perforations with the escaping air veil.
  • these can have a configuration which widens towards the inside of the roller and the edges of the perforations directed towards the roller preferably associated with rounded edge.
  • the document EP 0 071 033 describes a sail spreader to form a nonwoven made up of several plies, using, to limit the floating of the veil, breathable transfer means: a perforated endless belt, a back and forth movable perforated turning roller transferring the veil on a second endless perforated belt placed below the first belt, two reciprocating perforated folding rollers taking up the veil after turning over on the second endless belt.
  • the desired effect is press the veil on the transfer means using suction controlled throughout its journey in the mobile carriage and so that the veil remains uniform until it is removed.
  • the object of the present invention is in particular to alleviate these disadvantages, by proposing a solution to obtain an efficiency of improved suction and therefore good hold of the veil without it deforms, without entanglement of the fibers, whatever their size, the roller suction with a high vacuum rate while maintaining a very good mechanical strength.
  • suction roller for the treatment of a veil of fibers textiles or equivalent product if necessary denser or thicker a tablecloth, a ribbon etc., said roller being hollow connected to a source suction and having a cylindrical wall provided with suction orifices, characterized in that said suction ports open into at least a vacuum chamber formed in the cylindrical wall between zones support for the veil.
  • the vacuum chambers share their function, are of dimensions larger than the orifices suction, which means that the suction surface of the roller to the right of the vacuum chambers between the support zones is increased compared to the state of the art, while retaining for the roller good mechanical strength. This advantage is important for the most applications where the suction roller is a wearing part. With a roller according to the invention, more than 90% of the surface of the product textile can be exposed to suction against less than 40% with a classic perforated roller.
  • the cylindrical wall is provided with perforations which are stepped comprising a lower stage forming the suction orifice opening into an upper floor of larger dimensions (for example thanks to a conical or flared shape) forming said vacuum chamber.
  • the orifices are arranged in the bottom of the grooves, a depression being created between the bottom of each groove and its two ridges neighboring, the ridges of grooves forming the support zones for the web.
  • the grooves have a sectional profile substantially triangular, this conformation allowing suction on practically the entire surface of the veil.
  • the suction ports can be staggered staggered between two adjacent grooves, allowing in particular to avoid the marking of lines on the veil and to confer on the roller better mechanical resistance.
  • the ridges of the grooves are rounded to avoid any risk of the web catching on the roller.
  • the ridges of the grooves extend perpendicular to the direction of the fibers of the web.
  • the splines can thus be for example circumferential, that is to say perpendicular to the axis of revolution of the roller, axial, i.e. parallel to the axis of revolution of the roller, helical or describing two reverse propellers substantially joining in the central part of the roller. This last configuration has the additional effect of if necessary counteract a lateral stretching of the web.
  • the pitch of the grooves or the spacing of the perforations, as well as the depth of grooves or perforations depend on fiber characteristics (length and denier) and shape (holes or slits) and the spacing of the suction ports depend on the intended applications and the density of the veil.
  • the suction is effective only in the active area of the roller, i.e. in the area passage of the veil on the roller where the veil needs to be maintained and guided to avoid its floating. It is defined by means of deflection arranged inside the roller.
  • the means of deflection can include two radial deflectors with possibly one variable angular spacing or an arcuate deflector possibly of variable arc length telescopically.
  • the roller according to the invention can be produced for example from of a sheet which is punctured using appropriate means and then soda to form the roll, or by spinning, machining or foundry.
  • the material is chosen according to the application, for example a light alloy aluminum which is then subjected to a surface treatment electrochemical to harden it, or a material based on carbon fibers or even steel.
  • One of the common applications can to be the 90 ° change of direction of a sail substantially in a same plan with inversion of the veil or complete inversion of a veil in a mobile spreader-lapper entry carriage.
  • the current invention is particularly interesting for this latter application, because in a mobile spreader-lapper entry carriage, the web is subjected not only to its own inertia due to its transport speed relative to the carriage, but also to a centrifugal force during its overturning, that make the veil really need to be checked when turnaround.
  • the inversion of the web in the entry carriage is therefore one of the critical moments when the veil risks take off and deform, limiting the speed of the spreader (see in particular patent EP 0 517 563).
  • the veil is correctly checked when it is turned over in the movable entry carriage of the spreader-lapper, which increases the speed of movement back and forth of the carriage without deforming the web and therefore to increase the speed of production of groundwater. Thanks to better quality of sail, also because it no longer needs to be stretched or even stretched at the entrance of the spreader-lapper, we can reduce the number of folds also increase productivity. This is particularly interesting for a condensed veil. Indeed, the invention makes it possible to coat the veil at the condensation rate adapted to compliance with the MD / CD (direction resistance machine / transverse direction) desired while maintaining the quality of the web final and increasing the productivity of the installation. In addition, thanks to the invention, it was found that the control of fiber-based sails short and volatile like viscose, was possible, allowing in some cases triple the production of the spreader-lapper.
  • roller suction device for example knitted or a sheet thin perforated, the roller providing the bearing mechanical structure.
  • the suction according to the invention can moreover have an effect additional consolidation on the veil causing compression or even the intertwining of fibers.
  • the tablecloth may be thinner than in the prior art, which facilitates entry into a subsequent machine, for example a needling machine.
  • the consolidation of the veil also has the very advantageous effect of reducing the machine cleaning frequency since fibers are better held in the veil or the tablecloth and do not scatter in the machine.
  • Figure 1 shows schematically and partly an example of spreader-lapper of the state of the art in which a transfer takes place of sail between two full rugs.
  • Veil 1 continuously arrives on a carpet full of endless arrival 2, then in a back and forth mobile entry cart 3 where it makes a U-turn and is then taken up by a full carpet endless receiver 4 continuously fed into said carriage 3 with a direction opposite to the direction of arrival of the full belt 2.
  • the veil 1 is pinched between the two solid belts 2 and 4.
  • the input trolley 3 has the function of rendering compatible, by varying the length of the pinch zone P, the arrival continuous veil on the first mat 2 with the unwinding of the veil at the exit of the exit carriage 5, the reeling varying according to the position of the carriage outlet 5 and the opposite direction or no advance of the carriage 5 relative to the direction of advance of the veil on the carpet 2.
  • the mat full 2 is guided by two guide rollers 7 and 8 carried by the carriage mobile 2 defining an inclined section 9 so that the web 1 transported by this mat then performs around the second roller 8 a turn that is less than 180 °.
  • the path of the second full carpet 4 is defined by four rolls of guide 10, 11, 12 and 13 carried by the input carriage 2 and arranged firstly that a pinch line 14 is formed between the guide roller 8 of the first belt 2 around which the web 1 performs its turn and one of the guide rollers (11 in Figure 1) of the second carpet 4 and, on the other hand, that the second carpet 4 is brought near the roller 8 to resume the veil 1 at its exit.
  • FIG 2 there is shown a transfer device between two solid mats applied to a mobile spreader-lapper entry trolley capable of replace the carriage 3 described above (the same references are used below for the elements common to the two figures).
  • the first carpet full 2 turns around three guide rollers driven in the same direction: an upper roller 20, a roller intermediate 21 and a lower roller 22.
  • the intermediate roller 21 is placed so as to define in section a sharp turn for the carpet 2 with an inclined portion 23 before the roller 21 and an inclined portion 24 after the roller 21.
  • the second full belt 4 is guided for its part in the carriage movable 3 by three guide rollers: the belt is guided in "S" around of an upper roller 41, then around an intermediate roller 42 driven in reverse, then a lower roller 43 bringing the carpet 4 at the appropriate level in relation to the full carpet 2 to achieve the pinch P defined between the two mobile input and output carriages. All guide rollers are fixed to the carriage frame and driven automatically in rotation with the movement of the corresponding mat.
  • the transfer device comprises a suction roller 31 which is fixed to the chassis of the carriage 3 and positioned in front of the inclined portion 24 at a minimum distance from the belt 2.
  • the diameter of the roller 31 and its position are also preferably chosen so that the transfer of the veil 1 around the periphery of the suction roller is made substantially tangentially and minimizing the vacuum distance d between the intermediate roller 21 and the transfer roller 31 and also so that the web of the roller 31 is transferred then as closely as possible in the plane of the second full mat 4.
  • the rotation of the suction roller 31 is ensured by means of a coupling 44 with the guide roller 42 of the second solid belt 4, this last being thanks to the configuration in "S" driven in the direction adequate rotation so that the web 1 and the solid carpet 4 arrive in the same direction after turning the veil and especially advantageously at the same speed.
  • the solid belt 4 can act as a barrier compression or depression due to displacement of the trolley; this can be recommended in extreme speed cases.
  • the cylindrical wall of the roller 31 is permeable to air and laterally connected to a controlled suction source to maintain the veil during its inversion.
  • the means used to supply the suction roller 31 with a movable suction may include a on-board fan, or a flexible or telescopic hose system connected to a fixed fan, or a connection nozzle connected to a suction manifold.
  • the connection to the means suction is carried out by each end of the roller.
  • Means of deflection shown diagrammatically by the arcuate deflector 46 make it possible to define a effective suction area in the curvature carried out by the veil.
  • Figure 3 shows an alternative embodiment according to which, the web 1 is transferred not directly to the suction roller 31 but to a small endless perforated mat 50 mounted around the suction roller 31 and two guide rollers 51 and 52 arranged opposite the belt portion full inclined 23 in the vicinity respectively of the guide rollers 21 and 22.
  • This construction limits the void areas between the roller suction 31 and the carpet 2 in which the veil is not controlled.
  • Figure 4 shows another alternative embodiment still in which one uses a configuration in "S" for the solid carpet 2 with the arrangement of an additional guide roller 53 in a plane in rear of the two guide rollers 21 and 22, which allows these two guide rollers 21 and 22 to be approached as close as possible to the roller sucking 31 and therefore reducing the empty spaces between the carpet 2 and the roller 31.
  • a variant is also shown a substantially straight arrival of the carpet 4 guided in the mobile carriage 3 by at minus a guide roller 54.
  • a variant is also shown straight arrival of the belt 2 with the removal of the inclined portion 23.
  • Figure 5 shows yet another alternative embodiment of the carriage input 3 spreader-lapper using a second roller suction 60 according to the invention placed above the web 1, before its reversal, between the belt 2 and the roller 31, to further control the veil in the corresponding vacuum area between them.
  • the belt 2 is guided around a first guide roller 61 and a second guide roller 62, between which a portion is defined of inclined carpet 63 so that carpet 2 then turns onto the roller 62 for turning less than 180 °.
  • This inclined portion allows also transfer over a larger angular extent of suction of the upper suction roller 60.
  • the transfer of the suction roller 60 to the turning roller 31 is effected by the relative positioning of the active suction zones.
  • Belt 4 is guided opposite the rollers suction 60 and 31 around two upper guide rollers 64 and lower 65 so as to describe a path in "S".
  • this configuration makes it possible to couple the guide roller 64 and the roller suction 60 and the guide roller 65 and the suction roller 31 for the train jointly.
  • This configuration with the inclined plane 63, allows to place the two belts 2 and 4 at substantially the same level, as well as the top of roller 63. This avoids ventilation due to displacement back and forth of the carriage.
  • FIGS 6 to 13 describe the suction roller according to the invention.
  • a suction roller 100 is hollow having a wall cylindrical provided on its outer surface with grooves 102 here axial extending over the length of the roll and two opposite ends 100A, 100B.
  • Each groove 102 can be defined by a crest 103 framed by two bottoms 104, each bottom 104 being made permeable to air thanks to suction orifices 105 of shape and density adapted according to the targeted applications, the suction force being a function of the density of the web or equivalent product in contact with the suction roller.
  • a perforated axial tube 106 is formed inside the roller 100 protruding on either side of its ends 100A, 100B, the ends of the tube 106 being connected in a manner known per se to a source external suction.
  • the roller 100 is adapted to be driven in rotation relative to tube 106 along an axis A of rotation by means of bearings with suitable ball R
  • the effective suction zone (107 in figure 6), at the entrance 109 from which a veil of fibers 108 is supported by the roller 100 and at the outlet 110 from which the veil is released, is delimited here by two radial deflectors 111A and 111B which are connected to the axial tube 106.
  • deflectors can advantageously be provided with means for adjustment of their spacing (illustrated by arrows F) so that adjust the angular extent of the suction area 107.
  • the tube 106 is perforated on the side only of the suction zone 107.
  • the blanks 110A, 110B facing one another of neighboring grooves 102 move away from the common bottom 104 towards the outside of the roller, so that when the interior of the roller is depressed, a depression C is formed between the bottom 104 of the grooves and the two ridges neighbors offering a suction surface between two ridges 103 enlarged by relative to the outlet section of the orifice 105 and offset relative thereto.
  • the suction power is adjusted, in particular according to the speed scroll 108, so that it is maintained and guided on the ridges of grooves 103 thanks to the vacuum chamber C.
  • the air present in the web 108 is sucked radially if necessary inside of the roller through the orifices 105 (shown diagrammatically by the arrows F2). Thanks to the presence of the vacuum chamber C, the fibers of the web are thus not not in contact with the orifices 105 and are unlikely to clog them.
  • a triangular cross-section of the grooves as in Figures 7 and 8 advantageously makes it possible to further increase the suction surface of the depression chambers C and therefore to draw the veil over practically any its surface while retaining good mechanical strength for the roller.
  • the ridges 103 of the grooves are advantageously rounded as also shown in Figures 7 and 8.
  • the bottom 104 of the grooves is enlarged with respect to the ridges 103 of the grooves to be able to increase the size of the orifices 105 and thus the force suction.
  • the orifices 105 which are provided aligned from one bottom flute 104 to another in Figure 8, but which could also be staggered from a groove bottom to a other.
  • the shape of the orifices 105 can also vary, either so homogeneous over the length of the roll, or inhomogeneous to create an effect desired aspiration, such as homogenization or concentration.
  • the cross section of the grooves can be trapezoidal, with the short side of the trapezoid corresponding to the groove crest, so that enlarge the bearing surfaces of the veil if necessary.
  • roller aspirating For an application of the roller aspirating to the inversion of a veil in a spreader-lapper, the following values can be given as purely indicative: a roll diameter of the order of one or more hundreds of mm and a depth and a groove pitch of the order of a few mm.
  • FIGS. 10 and 11 a second mode of drawing has been shown schematically.
  • realization of the perforated cylindrical wall according to the invention instead of grooves, 200 circular and two-stage perforations are formed in the cylindrical wall, comprising a lower stage constituted by a suction port 205 opening into an upper stage of dimensions larger than the orifice 205 forming the vacuum chamber C.
  • Support zones 203 for a veil are thus provided on the surface of the wall between the perforations 200, said support zones being more or smaller according to the spacing of the perforations.
  • the shape of the room of depression C can be conical or substantially parallelepiped as shown in Figure 11, with a suction port in its background.
  • Figures 12 and 13 show two alternative embodiments deflection means.
  • it is an arcuate deflector 115 in two parts 115A, 115B whose end portions are telescopically stackable to adjust the angular extent of deflection.
  • This design has the advantage of allowing adjustment of the angle of support of the veil by the suction roller and thus to cover multiple mounting configurations with the same roller design.
  • the same adjustable suction roller can be used to transfer a veil between a card and a lapper whatever the angle formed between the incoming carpet and the outgoing carpet.
  • this is a tube 116 inserted inside the suction roller 100 and comprising a arcuate wall area 116A breathable and an arcuate area of deflection 116B having a radius of curvature greater than that of the permeable wall zone 116A for blocking the suction ports 105 of the roller, the two zones 116A and 116B being connected by radial walls 117 and 118.
  • This creates a homogeneous depression pre-chamber 119 between the deflector 116A and the roller 100.
  • the deflector 116A then ensures a diffuser function so as to homogenize the depression in this pre-chamber along the entire length of the suction roller.
  • FIG 14 illustrates another possible application for transfer of sail using a suction roller according to the invention.
  • the transfer device is used to deposit a second web 80 on a first veil 81 at the entry of a spreader-lapper in order to form an exit double veil.
  • the first veil is brought to a first full carpet 82.
  • the second veil is brought on a second full carpet 83 moved according to the same direction as the carpet 82 but in a plane located above.
  • the carpet 83 is guided on an inclined portion 86 defined between two upper guide rollers 87 and 88 and a lower guide roller 89 located in a closer plane of the carpet 82 and around which the carpet 83 makes a reversal for start in the opposite direction.
  • Controlled transfer of the veil onto the carpet 82 is carried out using a suction roller 90 according to the invention, placed above of the web 80 so that the latter is held by suction before to be placed on the veil 81.
  • FIG. 15 illustrates another possible application according to the invention.
  • the suction roller is used to turn over of sail to apply a 90 ° change of direction to the sail substantially in the same plane.
  • a veil 91 arrives on a first carpet full 92 which makes a U-turn using an oblique guide roller 93.
  • a suction roller 94 according to the invention is placed near the roller 93 to resume the veil 91. The latter is then taken care of by the suction roller 94, follows a curvature corresponding to a reversal to find themselves substantially in the same plane, the position of the roller suction 94 defining the direction in which the veil 91 leaves on the second full conveyor belt 95.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The suction roller (100) is hollow and has surface holes connected to an internal suction source. The holes are located in the base of converging suction chambers in the form of channels created between surface ridges. The ridges can run lengthwise along the roller, circumferentially or in a spiral line, and their crests (102) support the fibre mat. The ridges can be triangular in section with rounded crests, or trapezoid, with the crests formed by their smaller edges, and the suction holes can be in rows staggered between adjacent channels. The dimensions of the inner suction zone (107) can be defined by inner radial deflectors (111A, 111B) on either side of a perforated section of the roller's tubular axle (106).

Description

La présente invention concerne un rouleau aspirant pour le traitement d'un voile de fibres textiles ou produit équivalent le cas échéant plus dense et/ou épais comme une nappe, un ruban etc.The present invention relates to a suction roller for treatment a veil of textile fibers or equivalent product, if necessary, denser and / or thick like a tablecloth, a ribbon etc.

Dans le domaine textile des non tissés, les applications suivantes sont notamment connues.In the nonwoven textile sector, the following applications are notably known.

Le document FR 1 500 746 décrit un cylindre aspirant utilisé pour entraíner un voile de fibres textiles puis le détacher, par exemple un voile cardé en sortie de peigneur, ou pour redistribuer un voile dans un étaleur-nappeur. Le cylindre aspirant décrit est creux avec une paroi cylindrique perforée ou rendue perméable à l'air. Il comporte un secteur d'aspiration délimité par des cloisons et qui est mis en dépression. Selon un exemple décrit, l'aspiration se fait par l'intermédiaire d'un tube perforé coaxial ou non avec aspiration à ses deux extrémités, les perforations du tube étant distribuées et/ou de dimensions telles qu'une aspiration uniforme est assurée sur toute la longueur du tube.Document FR 1,500,746 describes a suction cylinder used for entrain a veil of textile fibers then detach it, for example a veil carded at the end of the comber, or to redistribute a veil in a spreader-lapper. The suction cylinder described is hollow with a cylindrical wall perforated or made breathable. It has a suction sector delimited by partitions and which is put in depression. According to an example described, the suction is done via a coaxial perforated tube or not with suction at both ends, the perforations of the tube being distributed and / or of such dimensions that a uniform suction is over the entire length of the tube.

Dans l'application à un étaleur-nappeur décrite dans ce document, deux rouleaux aspirants montés symétriquement servent à reprendre et à plier un voile dans un chariot mobile de sortie déplacé en va-et-vient au dessus d'un tablier de réception du voile plié disposé perpendiculairement. Ces deux rouleaux aspirants sont reliés alternativement aux moyens produisant l'aspiration, le voile guidé entre les deux rouleaux étant alternativement aspiré par l'un ou l'autre des rouleaux selon le sens de déplacement du chariot mobile.In the application to a spreader-lapper described in this document, two symmetrically mounted suction rollers are used to pick up and fold a veil in a movable exit carriage moved back and forth at above an apron for receiving the folded veil arranged perpendicularly. These two suction rollers are connected alternately to the means producing the suction, the veil guided between the two rollers being alternately drawn by one or the other of the rollers according to the direction of moving the moving carriage.

Le document EP 0 733 729 divulgue un rouleau aspirant utilisé pour transférer en sortie de carde un voile fibreux entre un tapis de transport et deux cylindres de calandrage, cela permettant de diminuer l'étirage du voile et d'éviter les problèmes de flottement. Le cylindre aspirant est interposé sur le parcours du voile entre le tapis de transport et les deux cylindres de calandrage. Au niveau du cylindre aspirant, le voile se trouve plaqué par aspiration à la surface dudit cylindre et s'y trouve maintenu par aspiration jusqu'à une zone de pré-calandrage située entre le cylindre aspirant et le cylindre de calandrage inférieur. Le cylindre aspirant est réalisé par exemple à partir d'une tôle métallique perforée. Il comporte un secteur d'aspiration délimité par des cloisons dont le positionnement angulaire est réglable.Document EP 0 733 729 discloses a suction roller used for transfer a fibrous web between the conveyor belt and two calendering cylinders, thereby reducing the stretching of the web and to avoid floating problems. The suction cylinder is interposed on the path of the web between the conveyor belt and the two cylinders of calendering. At the suction cylinder, the veil is pressed by suction on the surface of said cylinder and is held there by suction to a pre-calendering area located between the suction cylinder and the lower calendering cylinder. The suction cylinder is made for example from a perforated metal sheet. It has a suction sector delimited by partitions whose angular positioning is adjustable.

Le document FR 2 612 949 divulgue un dispositif pour consolider un voile textile ou équivalent dans lequel on fait passer le voile dans la fente formée par au moins deux rouleaux juxtaposés, en appliquant une pression. Les deux rouleaux sont creux, leur surface périphérique étant perforée ou grillagée. L'échappement de l'air produit au cours de la compression du voile peut se faire radialement en pénétrant à l'intérieur des deux rouleaux perforés. En outre, les rouleaux perforés peuvent être soumis à l'action d'une aspiration. Les auteurs préconisent que le diamètre des perforations soit égal ou inférieur à la profondeur des perforations, de sorte que les fibres ne soient pas entraínées à travers les perforations avec l'air qui s'échappe du voile. Par ailleurs, pour éviter que les fibres ne restent accrochées aux perforations, celles-ci peuvent avoir une configuration qui s'élargit vers l'intérieur du rouleau et les bords des perforations dirigés vers le rouleau associé de préférence à arête arrondie.Document FR 2 612 949 discloses a device for consolidating a textile fleece or equivalent in which the veil is passed through the slot formed by at least two juxtaposed rollers, applying pressure. The two rollers are hollow, their peripheral surface being perforated or screened. The exhaust air produced during the compression of the web can be done radially by penetrating inside the two rollers perforated. In addition, the perforated rollers can be subjected to the action of an aspiration. The authors recommend that the diameter of the perforations equal to or less than the depth of the perforations, so that the fibers are not entrained through the perforations with the escaping air veil. Furthermore, to prevent the fibers from becoming caught on the perforations, these can have a configuration which widens towards the inside of the roller and the edges of the perforations directed towards the roller preferably associated with rounded edge.

Le document EP 0 071 033 décrit un étaleur de voile pour former un non-tissé constitué de plusieurs plis, utilisant, pour limiter le flottement du voile, des moyens de transfert perméables à l'air : un tapis sans fin perforé, un rouleau de retournement perforé mobile en va-et-vient transférant le voile sur un second tapis sans fin perforé placé en dessous du premier tapis, deux rouleaux de pliage perforés mobiles en va-et-vient reprenant le voile après retournement sur le second tapis sans fin. L'effet recherché est de plaquer le voile sur les moyens de transferts à l'aide d'une aspiration contrôlée tout au long de son cheminement dans le chariot mobile et de sorte que le voile reste homogène jusqu'au moment où il est déposé. The document EP 0 071 033 describes a sail spreader to form a nonwoven made up of several plies, using, to limit the floating of the veil, breathable transfer means: a perforated endless belt, a back and forth movable perforated turning roller transferring the veil on a second endless perforated belt placed below the first belt, two reciprocating perforated folding rollers taking up the veil after turning over on the second endless belt. The desired effect is press the veil on the transfer means using suction controlled throughout its journey in the mobile carriage and so that the veil remains uniform until it is removed.

Comme autres applications connues mettant en oeuvre un rouleau aspirant, on peut aussi citer le contrôle d'un voile lors de son transfert entre tapis de sortie de carde et tapis plein d'entrée d'étaleur-nappeur ou le transfert entre les tapis inférieur et supérieur d'une carde double peigneur pour former un double voile.As other known applications using a roller we can also cite the control of a veil during its transfer between carding exit mat and full spreader-lapper entry mat or transfer between the lower and upper belts of a double comber card to form a double veil.

Dans ces différentes applications, l'accrochage des fibres aux perforations et le bouchage de ces dernières, constituent les principaux problèmes rencontrés, diminuant l'efficacité de l'aspiration et les vitesses de transport et nécessitant un nettoyage des machines. Pour résoudre ces problèmes, il a été proposé, notamment dans les applications aux cardes (comme dans le document EP0733729 cité plus haut), d'utiliser des rouleaux fabriqués à partir de tôles minces ayant subies des micro-perforations par un traitement chimique. Toutefois, de tels rouleaux sont fragiles et leur tenue mécanique limite le taux de perforations, en général à 40%.In these different applications, the attachment of fibers to perforations and plugging them, are the main problems encountered, decreasing the suction efficiency and the transport and requiring cleaning of the machines. To resolve these problems, it has been proposed, especially in card applications (as in document EP0733729 cited above), to use rollers made from thin sheets having undergone micro-perforations by chemical treatment. However, such rollers are fragile and their mechanical strength limits the rate of perforations, in general to 40%.

La présente invention a pour but notamment de pallier ces inconvénients, en proposant une solution pour obtenir une efficacité de l'aspiration améliorée et donc une bonne tenue du voile sans qu'il ne se déforme, sans accrochage des fibres, quelque soit leur taille, le rouleau aspirant présentant un taux de vide élevé tout en conservant une très bonne tenue mécanique.The object of the present invention is in particular to alleviate these disadvantages, by proposing a solution to obtain an efficiency of improved suction and therefore good hold of the veil without it deforms, without entanglement of the fibers, whatever their size, the roller suction with a high vacuum rate while maintaining a very good mechanical strength.

Elle propose un rouleau aspirant pour le traitement d'un voile de fibres textiles ou produit équivalent le cas échéant plus dense ou épais comme une nappe, un ruban etc., ledit rouleau étant creux relié à une source d'aspiration et présentant une paroi cylindrique munie d'orifices d'aspiration, caractérisé en ce que lesdits orifices d'aspiration débouchent dans au moins une chambre de dépression formée dans la paroi cylindrique entre des zones d'appui pour le voile.It offers a suction roller for the treatment of a veil of fibers textiles or equivalent product if necessary denser or thicker a tablecloth, a ribbon etc., said roller being hollow connected to a source suction and having a cylindrical wall provided with suction orifices, characterized in that said suction ports open into at least a vacuum chamber formed in the cylindrical wall between zones support for the veil.

Grâce à cette chambre de dépression, l'air présent dans le voile textile est effectivement aspiré radialement vers l'intérieur du rouleau mais le voile reste guidé sur les zones d'appui sans être au contact des orifices d'aspiration. On élimine ainsi les risques d'entraínement et d'accrochage des fibres dans les orifices d'aspiration. De plus, les chambres de dépression, de part leur fonction, sont de dimensions plus grandes que les orifices d'aspiration, ce qui a pour conséquence que la surface d'aspiration du rouleau au droit des chambres de dépression entre les zones d'appui est augmentée par rapport à l'état de la technique, tout en conservant pour le rouleau une bonne tenue mécanique. Cet avantage est important pour la plupart des applications où le rouleau aspirant constitue une pièce d'usure. Avec un rouleau selon l'invention, plus de 90% de la surface du produit textile peut être exposée à l'aspiration contre moins de 40% avec un rouleau perforé classique.Thanks to this vacuum chamber, the air present in the veil textile is actually sucked radially inward from the roller but the veil remains guided on the support zones without being in contact with the orifices suction. This eliminates the risk of entrainment and entanglement of fibers in the suction ports. In addition, the vacuum chambers, share their function, are of dimensions larger than the orifices suction, which means that the suction surface of the roller to the right of the vacuum chambers between the support zones is increased compared to the state of the art, while retaining for the roller good mechanical strength. This advantage is important for the most applications where the suction roller is a wearing part. With a roller according to the invention, more than 90% of the surface of the product textile can be exposed to suction against less than 40% with a classic perforated roller.

Selon un exemple de réalisation possible pouvant convenir typiquement pour des voiles faits de fibres orientées dans plusieurs directions, la paroi cylindrique est munie de perforations qui sont étagées comportant un étage inférieur formant l'orifice d'aspiration débouchant dans un étage supérieur de dimensions plus grandes (par exemple grâce à une forme conique ou évasée) formant ladite chambre de dépression.According to a possible embodiment which may be suitable typically for sails made of fibers oriented in several directions, the cylindrical wall is provided with perforations which are stepped comprising a lower stage forming the suction orifice opening into an upper floor of larger dimensions (for example thanks to a conical or flared shape) forming said vacuum chamber.

Selon un autre exemple de réalisation possible, les orifices d'aspiration sont disposés dans le fond de cannelures, une chambre de dépression étant créée entre le fond de chaque cannelure et ses deux crêtes voisines, les crêtes de cannelures formant les zones d'appui pour le voile.According to another possible embodiment, the orifices are arranged in the bottom of the grooves, a depression being created between the bottom of each groove and its two ridges neighboring, the ridges of grooves forming the support zones for the web.

De préférence, les cannelures présentent un profil en coupe sensiblement triangulaire, cette conformation permettant une aspiration sur pratiquement toute la surface du voile. Les orifices d'aspiration peuvent être décalés en quinconce entre deux cannelures voisines, cela permettant notamment d'éviter le marquage de lignes sur le voile et de conférer au rouleau une meilleure résistance mécanique.Preferably, the grooves have a sectional profile substantially triangular, this conformation allowing suction on practically the entire surface of the veil. The suction ports can be staggered staggered between two adjacent grooves, allowing in particular to avoid the marking of lines on the veil and to confer on the roller better mechanical resistance.

De préférence encore, les crêtes des cannelures sont arrondies pour éviter tout risque d'accrochage du voile sur le rouleau. En outre, on peut prévoir un fond de cannelure élargi par rapport aux crêtes de cannelure pour pouvoir agrandir les orifices d'aspiration. More preferably, the ridges of the grooves are rounded to avoid any risk of the web catching on the roller. In addition, we can provide a wider groove bottom relative to the groove ridges to ability to enlarge suction ports.

De préférence encore, pour améliorer l'entraínement du voile sans accrochage des fibres, on fait en sorte que les crêtes des cannelures s'étendent perpendiculairement à la direction des fibres du voile. Les cannelures pourront être ainsi par exemple circonférentielles, c'est-à-dire perpendiculaires à l'axe de révolution du rouleau, axiales, c'est-à-dire parallèles à l'axe de révolution du rouleau, hélicoïdales ou décrivant deux hélices inverses se rejoignant sensiblement dans la partie centrale du rouleau. Cette dernière configuration a pour effet supplémentaire de contrecarrer le cas échéant un étirage latéral du voile.More preferably, to improve the training of the veil without hooking the fibers, we make sure that the ridges of the grooves extend perpendicular to the direction of the fibers of the web. The splines can thus be for example circumferential, that is to say perpendicular to the axis of revolution of the roller, axial, i.e. parallel to the axis of revolution of the roller, helical or describing two reverse propellers substantially joining in the central part of the roller. This last configuration has the additional effect of if necessary counteract a lateral stretching of the web.

Le pas des cannelures ou l'écartement des perforations, ainsi que la profondeur des cannelures ou des perforations dépendent des caractéristiques des fibres (longueur et denier) et la forme (trous ou fentes) et l'espacement des orifices d'aspiration dépendent des applications visées et de la densité du voile.The pitch of the grooves or the spacing of the perforations, as well as the depth of grooves or perforations depend on fiber characteristics (length and denier) and shape (holes or slits) and the spacing of the suction ports depend on the intended applications and the density of the veil.

Selon une autre caractéristique de l'invention, l'aspiration est effective seulement dans la zone active du rouleau, c'est-à-dire dans la zone de passage du voile sur le rouleau où le voile a besoin d'être maintenu et guidé pour éviter son flottement. Elle est définie par des moyens de déflection disposés à l'intérieur du rouleau. Les moyens de déflection peuvent comprendre deux déflecteurs radiaux avec éventuellement un écartement angulaire variable ou un déflecteur arqué éventuellement de longueur d'arc variable télescopiquement. On peut également utiliser un tube inséré à l'intérieur du rouleau aspirant et comprenant une zone perméable à l'air et une zone imperméable formant déflecteur, les moyens d'aspiration étant mis en communication avec l'intérieur dudit tube.According to another characteristic of the invention, the suction is effective only in the active area of the roller, i.e. in the area passage of the veil on the roller where the veil needs to be maintained and guided to avoid its floating. It is defined by means of deflection arranged inside the roller. The means of deflection can include two radial deflectors with possibly one variable angular spacing or an arcuate deflector possibly of variable arc length telescopically. You can also use a tube inserted inside the suction roller and comprising a zone breathable and an impermeable zone forming a deflector, the means suction being placed in communication with the interior of said tube.

L'aspiration étant effectuée par les extrémités du rouleau, plusieurs solutions peuvent être mises en oeuvre pour homogénéiser l'aspiration sur toute la longueur du rouleau, par exemple des perforations de taille et de densité augmentant des extrémités vers la partie centrale du rouleau aspirant lui-même, ou de la zone perméable d'un tube déflecteur, ou par l'emploi d'une pièce de forme dont la section évolue sur la longueur du rouleau.As the suction is carried out by the ends of the roller, several solutions can be implemented to homogenize the suction on the entire length of the roll, for example size and increasing density from the ends towards the central part of the roller itself, or from the permeable area of a deflector tube, or by the use of a shaped part whose section changes along the length of the roller.

On peut aussi avantageusement prévoir, des moyens pour créer une aspiration progressivement plus important dans une zone d'étendue angulaire choisie, par exemple à l'endroit où la force centrifuge est la plus grande. Ceci peut être réalisé également en modifiant les caractéristiques et la densités des perforations dans cette zone d'aspiration concentrée.One can also advantageously provide, means for creating a progressively larger suction in an extended area angle chosen, for example where the centrifugal force is greatest big. This can also be achieved by modifying the characteristics and the density of the perforations in this concentrated suction zone.

Le rouleau selon l'invention peut être fabriqué par exemple à partir d'une tôle que l'on perfore à l'aide de moyens appropriés, puis que l'on soude pour former le rouleau, ou par filage, usinage ou fonderie. Le matériau est choisi en fonction de l'application, par exemple un alliage léger d'aluminium auquel on fait subir ensuite un traitement de surface électrochimique pour le durcir, ou un matériau à base de fibres de carbone ou encore en acier.The roller according to the invention can be produced for example from of a sheet which is punctured using appropriate means and then soda to form the roll, or by spinning, machining or foundry. The material is chosen according to the application, for example a light alloy aluminum which is then subjected to a surface treatment electrochemical to harden it, or a material based on carbon fibers or even steel.

Le rouleau aspirant selon l'invention peut être utilisé dans les applications connues de l'état de la technique décrites plus haut :

  • pour le transfert :
    • entre peigneur et tapis de sortie de carde,
    • avec retournement entre tapis perforés supérieur et inférieur notamment dans un étaleur/nappeur,
    • entre tapis de carde et rouleau de calandrage,
    • entre tapis de sortie de carde et tapis plein d'entrée d'étaleur-nappeur,
    • entre les tapis inférieur et supérieur d'une carde double peigneur,
  • comme rouleau aspirant :
    • de pliage dans un chariot mobile de sortie d'étaleur/nappeur,
    • de consolidation.
The suction roller according to the invention can be used in the applications known from the state of the art described above:
  • for the transfer:
    • between comber and card exit mat,
    • with upturn between upper and lower perforated belts, especially in a spreader / lapper,
    • between card mat and calendering roller,
    • between carding exit mat and full spreader-lapper entry mat,
    • between the lower and upper belts of a double comber card,
  • as a suction roller:
    • folding in a mobile spreader / lapper exit carriage,
    • consolidation.

Comme application nouvelle, on peut mentionner le transfert avec retournement d'un voile de fibres textiles, nappe ou produits équivalents, d'un support d'arrivée mobile plein sur un support récepteur, notamment plein. As a new application, we can mention the transfer with turning a veil of textile fibers, tablecloth or equivalent products, of a full mobile arrival support on a receiver support, in particular full.

Plus précisément, on peut citer le changement de direction d'un voile, la position du rouleau aspirant (génératrice de la courbure perpendiculaire ou oblique par rapport à la direction d'arrivée du voile sur le premier tapis) et le sens d'avancée du tapis récepteur, définissant la direction prise ensuite par le voile repris par le tapis récepteur. Une des applications courantes peut être le changement de direction à 90° d'un voile sensiblement dans un même plan avec retournement du voile ou le retournement complet d'un voile dans un chariot mobile d'entrée d'étaleur-nappeur. La présente invention est particulièrement intéressante pour cette dernière application, car dans un chariot mobile d'entrée d'étaleur-nappeur, le voile est soumis non seulement à sa propre inertie due à sa vitesse de transport relative au chariot, mais également à une force centrifuge lors de son retournement, qui font que le voile a réellement besoin d'être contrôlé lors de son retournement. Dans ce type de machine, le retournement du voile dans le chariot d'entrée constitue donc l'un des moments critiques où le voile risque de se décoller et de se déformer, limitant la vitesse de l'étaleur (voir notamment le brevet EP 0 517 563). Grâce à un rouleau aspirant selon l'invention, le voile est correctement contrôlé lors de son retournement dans le chariot mobile d'entrée de l'étaleur-nappeur, ce qui permet d'augmenter la vitesse de déplacement en va-et-vient du chariot sans déformer le voile et donc d'augmenter la vitesse de production de nappe. Grâce à une meilleure qualité de voile, également parce qu'il n'a plus besoin d'être tendu voire étiré à l'entrée de l'étaleur-nappeur, on peut réduire le nombre de plis de la nappe et augmenter également la productivité. Ceci est particulièrement intéressant pour un voile condensé. En effet l'invention permet de napper le voile au taux de condensation adapté au respect du MD/CD (résistance sens machine/sens transversal) désiré tout en conservant la qualité de la nappe finale et en augmentant la productivité de l'installation. Par ailleurs, grâce à l'invention, on a pu constaté que le contrôle de voiles à base de fibres courtes et volatiles comme la viscose, était possible, permettant dans certains cas de tripler la production de l'étaleur-nappeur. More specifically, we can cite the change of direction of a veil, the position of the suction roller (generating the perpendicular curvature or oblique to the direction of arrival of the veil on the first mat) and the direction of advance of the receiving belt, defining the direction then taken by the veil picked up by the receiving mat. One of the common applications can to be the 90 ° change of direction of a sail substantially in a same plan with inversion of the veil or complete inversion of a veil in a mobile spreader-lapper entry carriage. The current invention is particularly interesting for this latter application, because in a mobile spreader-lapper entry carriage, the web is subjected not only to its own inertia due to its transport speed relative to the carriage, but also to a centrifugal force during its overturning, that make the veil really need to be checked when turnaround. In this type of machine, the inversion of the web in the entry carriage is therefore one of the critical moments when the veil risks take off and deform, limiting the speed of the spreader (see in particular patent EP 0 517 563). Thanks to a suction roller according to the invention, the veil is correctly checked when it is turned over in the movable entry carriage of the spreader-lapper, which increases the speed of movement back and forth of the carriage without deforming the web and therefore to increase the speed of production of groundwater. Thanks to better quality of sail, also because it no longer needs to be stretched or even stretched at the entrance of the spreader-lapper, we can reduce the number of folds also increase productivity. This is particularly interesting for a condensed veil. Indeed, the invention makes it possible to coat the veil at the condensation rate adapted to compliance with the MD / CD (direction resistance machine / transverse direction) desired while maintaining the quality of the web final and increasing the productivity of the installation. In addition, thanks to the invention, it was found that the control of fiber-based sails short and volatile like viscose, was possible, allowing in some cases triple the production of the spreader-lapper.

Dans les cas extrêmes, on peut prévoir d'enfiler sur le rouleau aspirant selon l'invention, un tube en textile par exemple tricoté ou une tôle mince perforée, le rouleau apportant la structure mécanique portante.In extreme cases, we can plan to thread on the roller suction device according to the invention, a textile tube for example knitted or a sheet thin perforated, the roller providing the bearing mechanical structure.

L'aspiration selon l'invention peut par ailleurs avoir un effet supplémentaire de consolidation sur le voile en provoquant le tassement voire l'entrelacement de fibres. Ainsi en sortie de l'étaleur-nappeur la nappe peut être moins épaisse que dans l'état de la technique, ce qui facilite l'entrée dans une machine suivante, par exemple dans une aiguilleteuse. La consolidation du voile a aussi pour effet très avantageux de diminuer la fréquence de nettoyage des machines puisque les fibres sont mieux tenues dans le voile ou la nappe et ne s'éparpillent pas dans la machine.The suction according to the invention can moreover have an effect additional consolidation on the veil causing compression or even the intertwining of fibers. Thus at the outlet of the spreader-lapper the tablecloth may be thinner than in the prior art, which facilitates entry into a subsequent machine, for example a needling machine. The consolidation of the veil also has the very advantageous effect of reducing the machine cleaning frequency since fibers are better held in the veil or the tablecloth and do not scatter in the machine.

La présente invention sera mieux comprise et d'autres avantages apparaítront à la lumière de la description qui va suivre d'exemples de réalisation, description faite en référence aux dessins schématiques annexés sur lesquels :

  • la figure 1 est une vue partielle en coupe en élévation illustrant un étaleur-nappeur de l'état de la technique auquel on peut appliquer la présente invention ;
  • la figure 2 est une vue en coupe montrant un premier exemple de chariot mobile d'entrée d'étaleur-nappeur utilisant un rouleau aspirant selon de l'invention ;
  • les figures 3, 4 et 5 sont similaires à la figure 2 montrant chacunes une variante de réalisation du chariot;
  • la figure 6 est une vue en coupe d'un exemple de réalisation d'un rouleau aspirant cannelé selon l'invention ;
  • la figure 7 est une vue de détail agrandi de la figure 6 ;
  • la figure 8 est une vue partielle schématique en perspective du rouleau des figures 6 et 7 ;
  • la figure 9 est une vue en coupe longitudinale du rouleau des figures 6-8 avec un arrachement local montrant les moyens d'homogénéisation de l'aspiration ;
  • la figure 10 est une vue partielle du dessus d'une paroi cylindrique à perforations étagées selon un autre exemple de réalisation de l'invention ;
  • la figure 11 est une vue en coupe selon ligne XI-XI de la figure 10 illustrant une variante de forme pour les chambres de dépression ;
  • les figures 12 et 13 sont des vues en coupe schématique d'un rouleau aspirant selon l'invention illustrant chacune une variante de réalisation des moyens de déflection ;
  • la figure 14 est une vue en perspective illustrant un autre exemple d'application de l'invention dans lequel deux voiles sont superposés en entrée d'étaleur-nappeur ; et
  • la figure 15 est une vue de dessus illustrant un autre exemple d'application encore de l'invention dans lequel on fait effectuer un changement de direction à 90° à un voile avec retournement.
The present invention will be better understood and other advantages will appear in the light of the description which follows of embodiments, description made with reference to the appended schematic drawings in which:
  • Figure 1 is a partial sectional elevational view illustrating a spreader-lapper of the prior art to which the present invention can be applied;
  • FIG. 2 is a sectional view showing a first example of a mobile spreader-lapper entry carriage using a suction roller according to the invention;
  • Figures 3, 4 and 5 are similar to Figure 2 each showing an alternative embodiment of the carriage;
  • Figure 6 is a sectional view of an embodiment of a grooved suction roller according to the invention;
  • Figure 7 is an enlarged detail view of Figure 6;
  • Figure 8 is a partial schematic perspective view of the roller of Figures 6 and 7;
  • Figure 9 is a longitudinal sectional view of the roller of Figures 6-8 with a local cutaway showing the means for homogenizing the suction;
  • Figure 10 is a partial top view of a cylindrical wall with stepped perforations according to another embodiment of the invention;
  • Figure 11 is a sectional view along line XI-XI of Figure 10 illustrating a variant form for the vacuum chambers;
  • Figures 12 and 13 are schematic sectional views of a suction roller according to the invention each illustrating an alternative embodiment of the deflection means;
  • FIG. 14 is a perspective view illustrating another example of application of the invention in which two webs are superimposed at the entry of spreader-lapper; and
  • Figure 15 is a top view illustrating yet another example of application of the invention in which a change of direction is made at 90 ° to a sail with inversion.

La figure 1 montre schématiquement et en partie un exemple d'étaleur-nappeur de l'état de la technique dans lequel intervient un transfert de voile entre deux tapis pleins. Le voile 1 arrive en continu sur un tapis plein d'arrivée sans fin 2, puis, dans un chariot d'entrée mobile en va-et-vient 3 où il effectue un demi-tour pour être repris ensuite par un tapis plein récepteur sans fin 4 amené en continu dans ledit chariot 3 avec une direction opposée à la direction d'arrivée du tapis plein 2. En sortie du chariot 3, le voile 1 est pincé entre les deux tapis pleins 2 et 4. Le voile 1, ainsi maintenu par pincement dans une zone P, est ensuite repris par un second chariot mobile dit de sortie 5, ayant pour fonction d'étaler le voile en va-et-vient sur un tablier 6 se déplaçant en continu perpendiculairement au déplacement du chariot de sortie 5 de manière à former une nappe constituée de plis décalés. Le chariot d'entrée 3 a pour fonction de rendre compatible, en faisant varier la longueur de la zone de pincement P, l'arrivée en continu du voile sur le premier tapis 2 avec le dévidage du voile à la sortie du chariot de sortie 5, le dévidage variant selon la position du chariot de sortie 5 et le sens contraire ou pas d'avancée du chariot 5 par rapport au sens d'avancée du voile sur le tapis 2. Sur la figure 1 est représenté un chariot mobile d'entrée 3 selon l'état de la technique, dans lequel le tapis plein 2 est guidé par deux rouleaux de guidage 7 et 8 portés par le chariot mobile 2 définissant un tronçon incliné 9 de manière que le voile 1 transporté par ce tapis effectue ensuite autour du deuxième rouleau 8 un virage qui soit inférieur à 180°. Dans le chariot d'entrée 2, le trajet du deuxième tapis plein 4 est pour sa part défini par quatre rouleaux de guidage 10, 11, 12 et 13 portés par le chariot d'entrée 2 et disposés de manière d'une part qu'une ligne de pincement 14 soit ménagée entre le rouleau de guidage 8 du premier tapis 2 autour duquel le voile 1 effectue son virage et l'un des rouleaux de guidage (11 sur la figure 1) du second tapis 4 et, d'autre part, que le second tapis 4 soit amené à proximité du rouleau 8 pour reprendre le voile 1 à sa sortie.Figure 1 shows schematically and partly an example of spreader-lapper of the state of the art in which a transfer takes place of sail between two full rugs. Veil 1 continuously arrives on a carpet full of endless arrival 2, then in a back and forth mobile entry cart 3 where it makes a U-turn and is then taken up by a full carpet endless receiver 4 continuously fed into said carriage 3 with a direction opposite to the direction of arrival of the full belt 2. On leaving the carriage 3, the veil 1 is pinched between the two solid belts 2 and 4. The veil 1, thus held by pinching in an area P, is then taken up by a second mobile carriage, said outlet 5, having the function of spreading the web in back and forth on an apron 6 moving continuously perpendicular to the displacement of the output carriage 5 so as to form a sheet made up of offset folds. The input trolley 3 has the function of rendering compatible, by varying the length of the pinch zone P, the arrival continuous veil on the first mat 2 with the unwinding of the veil at the exit of the exit carriage 5, the reeling varying according to the position of the carriage outlet 5 and the opposite direction or no advance of the carriage 5 relative to the direction of advance of the veil on the carpet 2. In FIG. 1 is shown a mobile input cart 3 according to the state of the art, in which the mat full 2 is guided by two guide rollers 7 and 8 carried by the carriage mobile 2 defining an inclined section 9 so that the web 1 transported by this mat then performs around the second roller 8 a turn that is less than 180 °. In the entry carriage 2, the path of the second full carpet 4 is defined by four rolls of guide 10, 11, 12 and 13 carried by the input carriage 2 and arranged firstly that a pinch line 14 is formed between the guide roller 8 of the first belt 2 around which the web 1 performs its turn and one of the guide rollers (11 in Figure 1) of the second carpet 4 and, on the other hand, that the second carpet 4 is brought near the roller 8 to resume the veil 1 at its exit.

Sur la figure 2, est représenté un dispositif de transfert entre deux tapis pleins appliqué à un chariot mobile d'entrée d'étaleur-nappeur pouvant remplacer le chariot 3 décrit ci-dessus (les mêmes références sont utilisées ci-après pour les éléments communs aux deux figures). Le premier tapis plein 2 effectue son retournement autour de trois rouleaux de guidage entraínés dans le même sens : un rouleau supérieur 20, un rouleau intermédiaire 21 et un rouleau inférieur 22. Le rouleau intermédiaire 21 est placé de manière à définir en coupe un virage en pointe pour le tapis 2 avec une portion inclinée 23 avant le rouleau 21 et une portion inclinée 24 après le rouleau 21. Le second tapis plein 4 est guidé pour sa part dans le chariot mobile 3 par trois rouleaux de guidage : le tapis est guidé en "S" autour d'un rouleau supérieur 41, puis autour d'un rouleau intermédiaire 42 entraíné en sens inverse, puis d'un rouleau inférieur 43 amenant le tapis 4 au niveau approprié par rapport au tapis plein 2 pour réaliser la zone de pincement P définie entre les deux chariots mobiles d'entrée et de sortie. Tous les rouleaux de guidage sont fixés au châssis du chariot et entraínés automatiquement en rotation avec le déplacement du tapis correspondant. Le dispositif de transfert comprend un rouleau aspirant 31 qui est fixé au châssis du chariot 3 et positionné devant la portion inclinée 24 à une distance minimale du tapis 2. Le diamètre du rouleau 31 et sa position sont aussi choisis de préférence afin que le transfert du voile 1 sur le pourtour du rouleau aspirant se fasse sensiblement tangentiellement et en minimisant la distance de vide d entre le rouleau intermédiaire 21 et le rouleau de transfert 31 et également pour que le transfert du voile du rouleau 31 se fasse ensuite au plus près dans le plan du second tapis plein 4. Dans l'exemple représenté, la rotation du rouleau aspirant 31 est assurée grâce à un couplage 44 avec le rouleau de guidage 42 du second tapis plein 4, ce dernier se trouvant grâce à la configuration en "S" entraíné dans le sens adéquate de rotation pour que le voile 1 et le tapis plein 4 arrivent dans le même sens après le retournement du voile et surtout avantageusement à la même vitesse. On peut noter aussi ici que grâce à cette configuration en "S" en vis-à-vis du retournement du voile, le tapis plein 4 peut faire barrage aux phénomènes de compression ou de dépression dus au déplacement du chariot ; cela peut être recommandé dans les cas extrêmes de vitesses.In Figure 2, there is shown a transfer device between two solid mats applied to a mobile spreader-lapper entry trolley capable of replace the carriage 3 described above (the same references are used below for the elements common to the two figures). The first carpet full 2 turns around three guide rollers driven in the same direction: an upper roller 20, a roller intermediate 21 and a lower roller 22. The intermediate roller 21 is placed so as to define in section a sharp turn for the carpet 2 with an inclined portion 23 before the roller 21 and an inclined portion 24 after the roller 21. The second full belt 4 is guided for its part in the carriage movable 3 by three guide rollers: the belt is guided in "S" around of an upper roller 41, then around an intermediate roller 42 driven in reverse, then a lower roller 43 bringing the carpet 4 at the appropriate level in relation to the full carpet 2 to achieve the pinch P defined between the two mobile input and output carriages. All guide rollers are fixed to the carriage frame and driven automatically in rotation with the movement of the corresponding mat. The transfer device comprises a suction roller 31 which is fixed to the chassis of the carriage 3 and positioned in front of the inclined portion 24 at a minimum distance from the belt 2. The diameter of the roller 31 and its position are also preferably chosen so that the transfer of the veil 1 around the periphery of the suction roller is made substantially tangentially and minimizing the vacuum distance d between the intermediate roller 21 and the transfer roller 31 and also so that the web of the roller 31 is transferred then as closely as possible in the plane of the second full mat 4. In the example shown, the rotation of the suction roller 31 is ensured by means of a coupling 44 with the guide roller 42 of the second solid belt 4, this last being thanks to the configuration in "S" driven in the direction adequate rotation so that the web 1 and the solid carpet 4 arrive in the same direction after turning the veil and especially advantageously at the same speed. We can also note here that thanks to this configuration in "S" opposite the veil reversal, the solid belt 4 can act as a barrier compression or depression due to displacement of the trolley; this can be recommended in extreme speed cases.

Selon l'invention, la paroi cylindrique du rouleau 31 est perméable à l'air et reliée latéralement à une source d'aspiration contrôlée pour maintenir le voile lors de son retournement. Les moyens mis en oeuvre pour alimenter le rouleau aspirant 31 avec une aspiration mobile peuvent comprendre un ventilateur embarqué, ou un système de tuyaux flexible ou télescopiques reliés à un ventilateur fixe, ou encore une buse de raccordement reliée à un collecteur d'aspiration. De préférence, le raccordement aux moyens d'aspiration est effectué par chaque extrémité de rouleau. Des moyens de déflection schématisés par le déflecteur arqué 46 permettent de définir une zone d'aspiration effective dans la courbure effectuée par le voile. Les caractéristiques du rouleau aspirant selon l'invention sont décrites en détails plus loin en référence aux figures 6 à 9.According to the invention, the cylindrical wall of the roller 31 is permeable to air and laterally connected to a controlled suction source to maintain the veil during its inversion. The means used to supply the suction roller 31 with a movable suction may include a on-board fan, or a flexible or telescopic hose system connected to a fixed fan, or a connection nozzle connected to a suction manifold. Preferably, the connection to the means suction is carried out by each end of the roller. Means of deflection shown diagrammatically by the arcuate deflector 46 make it possible to define a effective suction area in the curvature carried out by the veil. The characteristics of the suction roller according to the invention are described in detail further on with reference to FIGS. 6 to 9.

La figure 3 montre une variante de réalisation selon laquelle, le voile 1 est transféré non pas directement sur le rouleau aspirant 31 mais sur un petit tapis perforé 50 sans fin monté autour du rouleau aspirant 31 et de deux rouleaux de guidage 51 et 52 disposés en regard de la portion de tapis plein inclinée 23 à proximité respectivement des rouleaux de guidage 21 et 22. Cette construction permet de limiter les zones de vide entre le rouleau aspirant 31 et le tapis 2 dans lesquelles le voile n'est pas contrôlé.Figure 3 shows an alternative embodiment according to which, the web 1 is transferred not directly to the suction roller 31 but to a small endless perforated mat 50 mounted around the suction roller 31 and two guide rollers 51 and 52 arranged opposite the belt portion full inclined 23 in the vicinity respectively of the guide rollers 21 and 22. This construction limits the void areas between the roller suction 31 and the carpet 2 in which the veil is not controlled.

La figure 4 montre une autre variante de réalisation encore dans laquelle on utilise une configuration en "S" pour le tapis plein 2 avec la disposition d'un rouleau de guidage supplémentaire 53 dans un plan en arrière des deux rouleaux de guidage 21 et 22, qui permet à ces deux rouleaux de guidage 21 et 22 d'être approchés au plus près du rouleau aspirant 31 et donc de réduire les espaces vides entre le tapis 2 et le rouleau 31. Sur cette figure 4, on a également représenté en variante une arrivée sensiblement droite du tapis 4 guidé dans le chariot mobile 3 par au moins un rouleau de guidage 54. On a également représenté en variante une arrivée droite du tapis 2 avec la suppression de la portion inclinée 23.Figure 4 shows another alternative embodiment still in which one uses a configuration in "S" for the solid carpet 2 with the arrangement of an additional guide roller 53 in a plane in rear of the two guide rollers 21 and 22, which allows these two guide rollers 21 and 22 to be approached as close as possible to the roller sucking 31 and therefore reducing the empty spaces between the carpet 2 and the roller 31. In this FIG. 4, a variant is also shown a substantially straight arrival of the carpet 4 guided in the mobile carriage 3 by at minus a guide roller 54. A variant is also shown straight arrival of the belt 2 with the removal of the inclined portion 23.

La figure 5 montre une autre variante encore de réalisation de chariot d'entrée 3 d'étaleur-nappeur mettant en oeuvre un deuxième rouleau aspirant 60 selon l'invention placé au-dessus du voile 1, avant son retournement, entre le tapis 2 et le rouleau 31, pour contrôler en outre le voile dans la zone de vide correspondante située entre eux. Dans le chariot représenté, le tapis 2 est guidé autour d'un premier rouleau de guidage 61 et d'un second rouleau de guidage 62, entre lesquels est définie une portion de tapis inclinée 63 de sorte que le tapis 2 effectue un virage ensuite sur le rouleau 62 de retournement inférieur à 180°. Cette portion inclinée permet également un transfert sur une étendue angulaire plus grande d'aspiration du rouleau aspirant supérieur 60. Le transfert du rouleau aspirant 60 sur la rouleau de retournement 31 est effectué grâce au positionnement relatif des zones actives d'aspiration. Le tapis 4 est guidé en regard des rouleaux aspirants 60 et 31 autour de deux rouleaux de guidage supérieur 64 et inférieur 65 de manière à décrire un trajet en "S". De manière avantageuse, cette configuration permet de coupler le rouleau de guidage 64 et le rouleau aspirant 60 et le rouleau de guidage 65 et le rouleau aspirant 31 pour les entraíner conjointement. Cette configuration, avec le plan incliné 63, permet de placer les deux tapis 2 et 4 sensiblement au même niveau, ainsi que le haut du rouleau 63. Cela permet d'éviter la ventilation due au déplacement en va-et-vient du chariot.Figure 5 shows yet another alternative embodiment of the carriage input 3 spreader-lapper using a second roller suction 60 according to the invention placed above the web 1, before its reversal, between the belt 2 and the roller 31, to further control the veil in the corresponding vacuum area between them. In the cart shown, the belt 2 is guided around a first guide roller 61 and a second guide roller 62, between which a portion is defined of inclined carpet 63 so that carpet 2 then turns onto the roller 62 for turning less than 180 °. This inclined portion allows also transfer over a larger angular extent of suction of the upper suction roller 60. The transfer of the suction roller 60 to the turning roller 31 is effected by the relative positioning of the active suction zones. Belt 4 is guided opposite the rollers suction 60 and 31 around two upper guide rollers 64 and lower 65 so as to describe a path in "S". Advantageously, this configuration makes it possible to couple the guide roller 64 and the roller suction 60 and the guide roller 65 and the suction roller 31 for the train jointly. This configuration, with the inclined plane 63, allows to place the two belts 2 and 4 at substantially the same level, as well as the top of roller 63. This avoids ventilation due to displacement back and forth of the carriage.

Les figures 6 à 13 décrivent le rouleau aspirant selon l'invention.Figures 6 to 13 describe the suction roller according to the invention.

Selon l'exemple de réalisation représenté sur les figures 6 à 9, un rouleau aspirant 100 selon l'invention est creux comportant une paroi cylindrique munie sur sa surface externe de cannelures 102 ici axiales s'étendant sur la longueur du rouleau et deux extrémités opposées 100A, 100B. Chaque cannelure 102 peut être définie par une crête 103 encadrée par deux fonds 104, chaque fond 104 étant rendu perméable à l'air grâce à des orifices d'aspiration 105 de forme et de densité adaptées selon les applications visées, la force d'aspiration étant fonction de la densité du voile ou produit équivalent au contact du rouleau aspirant. Pour réaliser l'aspiration, un tube axial perforé 106 est ménagé à l'intérieur du rouleau 100 dépassant de part et d'autre de ses extrémités 100A, 100B, les extrémités du tube 106 étant reliées de manière connue en soi à une source externe d'aspiration. Le rouleau 100 est adapté à être entraíné en rotation par rapport au tube 106 selon un axe A de rotation grâce à des roulements à bille appropriés R La zone d'aspiration effective (107 sur la figure 6), à l'entrée 109 de laquelle un voile de fibres 108 est pris en charge par le rouleau 100 et à la sortie 110 de laquelle le voile est relâché, est délimitée ici par deux déflecteurs radiaux 111A et 111B qui sont reliés au tube axial 106. Ces déflecteurs peuvent être avantageusement munis de moyens de réglage de leur écartement (illustrés par des flèches F) de manière à pouvoir régler l'étendue angulaire de la zone d'aspiration 107. Par ailleurs, le tube 106 est perforé du côté seulement de la zone d'aspiration 107.According to the embodiment shown in Figures 6 to 9, a suction roller 100 according to the invention is hollow having a wall cylindrical provided on its outer surface with grooves 102 here axial extending over the length of the roll and two opposite ends 100A, 100B. Each groove 102 can be defined by a crest 103 framed by two bottoms 104, each bottom 104 being made permeable to air thanks to suction orifices 105 of shape and density adapted according to the targeted applications, the suction force being a function of the density of the web or equivalent product in contact with the suction roller. To realize suction, a perforated axial tube 106 is formed inside the roller 100 protruding on either side of its ends 100A, 100B, the ends of the tube 106 being connected in a manner known per se to a source external suction. The roller 100 is adapted to be driven in rotation relative to tube 106 along an axis A of rotation by means of bearings with suitable ball R The effective suction zone (107 in figure 6), at the entrance 109 from which a veil of fibers 108 is supported by the roller 100 and at the outlet 110 from which the veil is released, is delimited here by two radial deflectors 111A and 111B which are connected to the axial tube 106. These deflectors can advantageously be provided with means for adjustment of their spacing (illustrated by arrows F) so that adjust the angular extent of the suction area 107. Furthermore, the tube 106 is perforated on the side only of the suction zone 107.

Comme on le voit mieux sur la figure 7, selon l'invention, les flans 110A, 110B en regard l'une de l'autre de cannelures voisines 102, s'écartent depuis le fond commun 104 vers l'extérieur du rouleau, de sorte que lorsque l'on met en dépression l'intérieur du rouleau, une chambre de dépression C se forme entre le fond 104 des cannelures et les deux crêtes voisines offrant une surface d'aspiration entre deux crêtes 103 élargie par rapport à la section de sortie de l'orifice 105 et déportée par rapport à celle-ci. La puissance d'aspiration est réglée, notamment en fonction de la vitesse de défilement du voile 108, de sorte que celui-ci soit maintenu et guidé sur les crêtes de cannelures 103 grâce à la chambre de dépression C. L'air présent dans le voile 108 est aspiré radialement le cas échéant à l'intérieur du rouleau par les orifices 105 (schématisé par les flèches F2). Grâce à la présence de la chambre de dépression C, les fibres du voile ne sont ainsi pas au contact des orifices 105 et risquent peu de venir les boucher. Une forme triangulaire en coupe des cannelures comme sur les figures 7 et 8 permet avantageusement d'augmenter encore la surface d'aspiration des chambres de dépression C et donc d'aspirer le voile sur pratiquement toute sa surface tout en conservant une bonne tenue mécanique pour le rouleau. Pour augmenter encore le glissement du voile guidé sur le rouleau aspirant selon l'invention, les crêtes 103 des cannelures sont avantageusement arrondies comme représenté aussi sur les figures 7 et 8. Par ailleurs, le fond 104 des cannelures est élargi par rapport aux crêtes 103 des cannelures pour pouvoir augmenter la taille des orifices 105 et ainsi la force d'aspiration.As best seen in Figure 7, according to the invention, the blanks 110A, 110B facing one another of neighboring grooves 102, move away from the common bottom 104 towards the outside of the roller, so that when the interior of the roller is depressed, a depression C is formed between the bottom 104 of the grooves and the two ridges neighbors offering a suction surface between two ridges 103 enlarged by relative to the outlet section of the orifice 105 and offset relative thereto. The suction power is adjusted, in particular according to the speed scroll 108, so that it is maintained and guided on the ridges of grooves 103 thanks to the vacuum chamber C. The air present in the web 108 is sucked radially if necessary inside of the roller through the orifices 105 (shown diagrammatically by the arrows F2). Thanks to the presence of the vacuum chamber C, the fibers of the web are thus not not in contact with the orifices 105 and are unlikely to clog them. A triangular cross-section of the grooves as in Figures 7 and 8 advantageously makes it possible to further increase the suction surface of the depression chambers C and therefore to draw the veil over practically any its surface while retaining good mechanical strength for the roller. To further increase the sliding of the guided veil on the suction roller according to the invention, the ridges 103 of the grooves are advantageously rounded as also shown in Figures 7 and 8. In addition, the bottom 104 of the grooves is enlarged with respect to the ridges 103 of the grooves to be able to increase the size of the orifices 105 and thus the force suction.

Sur la figure 9, on a illustré par la portion en arraché, des moyens pour homogénéiser l'aspiration réalisée latéralement, constitués par des perforations du tube 106 progressivement agrandies (allongées) depuis les côtés du rouleau jusqu'au centre de celui-ci.In Figure 9, there is illustrated by the cutaway portion, means to homogenize the suction carried out laterally, consisting of perforations of tube 106 gradually enlarged (elongated) from the sides of the roller to the center of it.

Par ailleurs, pour certaines applications, comme le retournement d'un voile, on peut prévoir que sur la circonférence du rouleau dans la zone d'aspiration, il y ait une zone où l'aspiration est plus forte par exemple correspondant à l'endroit où la force centrifuge est la plus importante. Cette zone d'aspiration plus forte peut être obtenue avec des perforations dans cette zone de taille et/ou de densité plus grande, de préférence progressivement, par rapport au reste de la zone perméable. In addition, for certain applications, such as flipping a veil, we can foresee that on the circumference of the roller in the area there is an area where the suction is stronger for example corresponding to where the centrifugal force is greatest. This stronger suction area can be achieved with perforations in this area of larger size and / or density, preferably gradually, compared to the rest of the permeable zone.

Il va de soi que d'autres variantes de réalisation sont possibles, notamment en ce qui concerne la disposition des orifices 105 qui sont prévus alignés d'un fond cannelure 104 à un autre sur la figure 8, mais qui pourraient être aussi disposés en quinconce d'un fond de cannelure à un autre. La forme des orifices 105 peut également varier, soit de manière homogène sur la longueur du rouleau, soit inhomogène pour créer un effet d'aspiration recherché, tel qu'une homogénéisation ou une concentration. Par ailleurs, la section en coupe des cannelures peut être trapézoïdale, avec le petit côté du trapèze correspondant à la crête de cannelure, de manière à agrandir les surfaces d'appui du voile en cas de besoin.It goes without saying that other variant embodiments are possible, in particular with regard to the arrangement of the orifices 105 which are provided aligned from one bottom flute 104 to another in Figure 8, but which could also be staggered from a groove bottom to a other. The shape of the orifices 105 can also vary, either so homogeneous over the length of the roll, or inhomogeneous to create an effect desired aspiration, such as homogenization or concentration. Furthermore, the cross section of the grooves can be trapezoidal, with the short side of the trapezoid corresponding to the groove crest, so that enlarge the bearing surfaces of the veil if necessary.

Pour une application du rouleau aspirant au retournement d'un voile dans un étaleur-nappeur, les valeurs suivantes peuvent être données à titre purement indicatif : un diamètre de rouleau de l'ordre d'une ou plusieurs centaines de mm et une profondeur et un pas de cannelure de l'ordre de quelques mm.For an application of the roller aspirating to the inversion of a veil in a spreader-lapper, the following values can be given as purely indicative: a roll diameter of the order of one or more hundreds of mm and a depth and a groove pitch of the order of a few mm.

Sur les figures 10 et 11, on a schématisé un second mode de réalisation de la paroi cylindrique perforée selon l'invention. A la place de cannelures, des perforations 200 circulaires et à deux étages sont ménagées dans la paroi cylindrique, comportant un étage inférieur constitué par un orifice d'aspiration 205 débouchant dans un étage supérieur de dimensions plus grandes que l'orifice 205 formant la chambre de dépression C. Des zones d'appui 203 pour un voile sont ainsi ménagées sur la surface de la paroi entre les perforations 200, lesdites zones d'appui étant plus ou moins grandes selon l'écartement des perforations. La forme de la chambre de dépression C peut être conique ou sensiblement parallélépipédique comme représenté sur la figure 11, avec un orifice d'aspiration dans son fond.In FIGS. 10 and 11, a second mode of drawing has been shown schematically. realization of the perforated cylindrical wall according to the invention. Instead of grooves, 200 circular and two-stage perforations are formed in the cylindrical wall, comprising a lower stage constituted by a suction port 205 opening into an upper stage of dimensions larger than the orifice 205 forming the vacuum chamber C. Support zones 203 for a veil are thus provided on the surface of the wall between the perforations 200, said support zones being more or smaller according to the spacing of the perforations. The shape of the room of depression C can be conical or substantially parallelepiped as shown in Figure 11, with a suction port in its background.

Sur les figures 12 et 13, on a représenté deux variantes de réalisation des moyens de déflection. Sur la figure 12, il s'agit d'un déflecteur arqué 115 en deux parties 115A, 115B dont les portions terminales sont superposables télescopiquement pour pouvoir régler l'étendue angulaire de déflection. Cette conception a pour avantage de permettre un réglage de l'angle de prise en charge du voile par le rouleau aspirant et ainsi de couvrir plusieurs configurations de montage avec la même conception de rouleau. Par exemple, un même rouleau aspirant ainsi réglable peut être employé pour transférer un voile entre une carde et un nappeur quelque soit l'angle formé entre le tapis entrant et le tapis sortant. Sur la figure 13, il s'agit d'un tube 116 inséré à l'intérieur du rouleau aspirant 100 et comportant une zone de paroi arquée 116A perméable à l'air et une zone arquée de déflection 116B présentant un rayon de courbure plus grand que celui de la zone de paroi perméable 116A pour boucher les orifices d'aspiration 105 du rouleau, les deux zones 116A et 116B étant reliées par des parois radiales 117 et 118. On créé ainsi une pré-chambre de dépression 119 homogène entre le déflecteur 116A et le rouleau 100. Le déflecteur 116A assure alors une fonction de diffuseur de façon à homogénéiser la dépression dans cette pré-chambre sur toute la longueur du rouleau aspirant.Figures 12 and 13 show two alternative embodiments deflection means. In figure 12, it is an arcuate deflector 115 in two parts 115A, 115B whose end portions are telescopically stackable to adjust the angular extent of deflection. This design has the advantage of allowing adjustment of the angle of support of the veil by the suction roller and thus to cover multiple mounting configurations with the same roller design. For example, the same adjustable suction roller can be used to transfer a veil between a card and a lapper whatever the angle formed between the incoming carpet and the outgoing carpet. In Figure 13, this is a tube 116 inserted inside the suction roller 100 and comprising a arcuate wall area 116A breathable and an arcuate area of deflection 116B having a radius of curvature greater than that of the permeable wall zone 116A for blocking the suction ports 105 of the roller, the two zones 116A and 116B being connected by radial walls 117 and 118. This creates a homogeneous depression pre-chamber 119 between the deflector 116A and the roller 100. The deflector 116A then ensures a diffuser function so as to homogenize the depression in this pre-chamber along the entire length of the suction roller.

La figure 14 illustre une autre application possible de transfert de voile utilisant un rouleau aspirant selon l'invention. Dans cette application, le dispositif de transfert sert à déposer un second voile 80 sur un premier voile 81 à l'entrée d'un étaleur-nappeur afin de former en sortie une nappe à double voile. Le premier voile est amené sur un premier tapis plein 82. Le second voile est amené sur un second tapis plein 83 déplacé selon la même direction que le tapis 82 mais dans un plan situé au dessus. Pour être amené à la bonne hauteur au-dessus du tapis 82, le tapis 83 est guidé sur une portion inclinée 86 définie entre deux rouleaux de guidage supérieurs 87 et 88 et un rouleau de guidage inférieur 89 situé dans un plan plus proche du tapis 82 et autour duquel le tapis 83 effectue un retournement pour repartir en sens inverse. Le transfert contrôlé du voile sur le tapis 82 s'effectue grâce à un rouleau aspirant 90 selon l'invention, placé au dessus du voile 80 de manière que ce dernier soit maintenu par aspiration avant d'être déposé sur le voile 81. Figure 14 illustrates another possible application for transfer of sail using a suction roller according to the invention. In this app, the transfer device is used to deposit a second web 80 on a first veil 81 at the entry of a spreader-lapper in order to form an exit double veil. The first veil is brought to a first full carpet 82. The second veil is brought on a second full carpet 83 moved according to the same direction as the carpet 82 but in a plane located above. To be brought to the correct height above the carpet 82, the carpet 83 is guided on an inclined portion 86 defined between two upper guide rollers 87 and 88 and a lower guide roller 89 located in a closer plane of the carpet 82 and around which the carpet 83 makes a reversal for start in the opposite direction. Controlled transfer of the veil onto the carpet 82 is carried out using a suction roller 90 according to the invention, placed above of the web 80 so that the latter is held by suction before to be placed on the veil 81.

La figure 15 illustre une autre application possible selon l'invention. Dans cette application, le rouleau aspirant sert à effectuer un retournement de voile pour appliquer un changement de direction à 90° au voile sensiblement dans un même plan. Un voile 91 arrive sur un premier tapis plein 92 qui effectue un demi-tour à l'aide d'un rouleau de guidage oblique 93. Un rouleau aspirant 94 selon l'invention est placé à proximité du rouleau 93 pour reprendre le voile 91. Ce dernier est alors pris en charge par le rouleau aspirant 94, suit une courbure correspondant à un retournement pour se retrouver sensiblement dans le même plan, la position du rouleau aspirant 94 définissant la direction dans lequel le voile 91 repart sur le second tapis plein de transport 95.FIG. 15 illustrates another possible application according to the invention. In this application, the suction roller is used to turn over of sail to apply a 90 ° change of direction to the sail substantially in the same plane. A veil 91 arrives on a first carpet full 92 which makes a U-turn using an oblique guide roller 93. A suction roller 94 according to the invention is placed near the roller 93 to resume the veil 91. The latter is then taken care of by the suction roller 94, follows a curvature corresponding to a reversal to find themselves substantially in the same plane, the position of the roller suction 94 defining the direction in which the veil 91 leaves on the second full conveyor belt 95.

Claims (25)

Rouleau aspirant (100 ; 31 ; 60 ; 90 ; 94) pour le traitement d'un voile (108 ; 1 ; 80 ; 91) de fibres textiles ou produit équivalent le cas échéant plus dense ou épais comme une nappe, un ruban etc., ledit rouleau étant creux relié à une source d'aspiration et présentant une paroi cylindrique munie d'orifices d'aspiration, caractérisé en ce que lesdits orifices d'aspiration (105, 205) débouchent dans au moins une chambre de dépression (C) formée dans la paroi cylindrique entre des zones d'appui (103, 203) pour le voile.Suction roller (100; 31; 60; 90; 94) for the treatment of a veil (108; 1; 80; 91) of textile fibers or equivalent product if necessary more dense or thick such as a tablecloth, a ribbon etc. , said roller being hollow connected to a suction source and having a cylindrical wall provided with suction ports, characterized in that said suction ports (105, 205) open into at least one vacuum chamber (C) formed in the cylindrical wall between support zones (103, 203) for the web. Rouleau selon la revendication 1, caractérisé en ce que la chambre de dépression (C) présente une forme conique.Roller according to claim 1, characterized in that the vacuum chamber (C) has a conical shape. Rouleau selon la revendication 1, caractérisé en ce que les orifices d'aspiration (105) sont disposés dans le fond (104) de cannelures (102), la chambre de dépression (C) étant créée entre le fond (104) de chaque cannelure (102) et ses deux crêtes voisines (103), les crêtes de cannelures formant les zones d'appui pour le voile.Roller according to claim 1, characterized in that the suction orifices (105) are arranged in the bottom (104) of grooves (102), the vacuum chamber (C) being created between the bottom (104) of each groove (102) and its two neighboring ridges (103), the groove ridges forming the support zones for the web. Rouleau selon la revendication 3, caractérisé en ce que les cannelures (102) présentent un profil en coupe sensiblement triangulaire.Roller according to claim 3, characterized in that the grooves (102) have a substantially triangular sectional profile. Rouleau selon la revendication 3 ou 4, caractérisé en ce que la crête (103) des cannelures (102) est arrondie.Roller according to claim 3 or 4, characterized in that the crest (103) of the grooves (102) is rounded. Rouleau selon la revendication 5, caractérisé en ce que les cannelures (102) ont un profil en coupe trapézoïdal, le petit côté du trapèze correspondant à la crête (103) de cannelure.Roller according to claim 5, characterized in that the grooves (102) have a profile in trapezoidal section, the short side of the trapezium corresponding to the crest (103) of groove. Rouleau selon l'une quelconque des revendications précédentes, caractérisé en ce que le fond (104) des cannelures est élargi par rapport aux crêtes (103).Roller according to any one of the preceding claims, characterized in that the bottom (104) of the grooves is widened relative to the ridges (103). Rouleau selon l'une quelconque des revendications 3 à 7, caractérisé en ce que les orifices d'aspiration (105) sont décalés en quinconce entre deux cannelures voisines. Roller according to any one of Claims 3 to 7, characterized in that the suction orifices (105) are staggered between two adjacent grooves. Rouleau selon l'une quelconque des revendications 3 à 8, caractérisé en ce que les cannelures (102) sont circonférentielles, perpendiculaires à l'axe de révolution du rouleau.Roller according to any one of Claims 3 to 8, characterized in that the grooves (102) are circumferential, perpendicular to the axis of revolution of the roller. Rouleau selon l'une quelconque des revendications 3 à 8, caractérisé en ce que les cannelures (102) sont axiales, parallèles à l'axe de révolution du rouleau.Roller according to any one of Claims 3 to 8, characterized in that the grooves (102) are axial, parallel to the axis of revolution of the roller. Rouleau selon l'une quelconque des revendications 3 à 8, caractérisé en ce que les cannelures (102) sont hélicoïdales.Roller according to any one of Claims 3 to 8, characterized in that the grooves (102) are helical. Rouleau selon l'une quelconque des revendications 3 à 8, caractérisé en ce que les cannelures (102) décrivent deux hélices inverses.Roller according to any one of Claims 3 to 8, characterized in that the splines (102) describe two reverse helices. Rouleau selon la revendication 12, caractérisé en ce que les hélices se rejoignent sensiblement dans la partie centrale du rouleau.Roller according to claim 12, characterized in that the propellers meet substantially in the central part of the roller. Rouleau selon l'une quelconque des revendications précédentes, caractérisé par une zone d'aspiration (107) définie par des moyens de déflection (111A ; 111B ; 116B ; 115 ; 46) disposés à l'intérieur du rouleau.Roller according to any one of the preceding claims, characterized by a suction zone (107) defined by deflection means (111A; 111B; 116B; 115; 46) arranged inside the roller. Rouleau selon la revendication précédente, caractérisé par des moyens de réglage de l'étendue angulaire de la zone d'aspiration.Roller according to the preceding claim, characterized by means for adjusting the angular extent of the suction zone. Rouleau selon la revendication 14 ou 15, caractérisé par des moyens de concentration de l'aspiration pour créer une aspiration progressivement plus importante dans une zone d'étendue angulaire de la zone d'aspiration.Roller according to claim 14 or 15, characterized by means for concentrating the suction to create a progressively greater suction in an area of angular extent of the suction area. Rouleau selon la revendication 16, caractérisé en ce que la zone d'étendue angulaire correspond sensiblement à l'endroit où la force centrifuge est la plus grande.Roller according to claim 16, characterized in that the zone of angular extent corresponds substantially to the place where the centrifugal force is greatest. Rouleau selon l'une des revendications 14 à 17, caractérisé en ce que les moyens de déflection comprennent deux déflecteurs radiaux (111A ; 111B).Roller according to one of claims 14 to 17, characterized in that the deflection means comprise two radial deflectors (111A; 111B). Rouleau selon la revendication 18, caractérisé en ce que les moyens de réglage de l'étendue angulaire de la zone d'aspiration comprennent des moyens de réglage de l'écartement angulaire des deux déflecteurs radiaux. Roller according to claim 18, characterized in that the means for adjusting the angular extent of the suction zone comprise means for adjusting the angular spacing of the two radial deflectors. Rouleau selon l'une des revendications 14 à 17, caractérisé en ce que les moyens de déflection comprennent un déflecteur arqué (115 ; 116B).Roller according to one of claims 14 to 17, characterized in that the deflection means comprise an arcuate deflector (115; 116B). Rouleau selon la revendication 20, caractérisé en ce que le déflecteur arqué (115) possède une longueur d'arc variable télescopiquement.Roller according to claim 20, characterized in that the arcuate deflector (115) has a telescopically variable arc length. Rouleau selon l'une des revendications 14 à 17, caractérisé en ce les moyens de déflection comprennent un tube (116) disposé à l'intérieur du rouleau (100) et comprenant une zone (116A) perméable à l'air et une zone (116B) formant déflecteur, les moyens d'aspiration étant mis en communication avec l'intérieur dudit tube.Roller according to one of Claims 14 to 17, characterized in that the deflection means comprise a tube (116) disposed inside the roller (100) and comprising a zone (116A) breathable and a zone ( 116B) forming a deflector, the suction means being placed in communication with the interior of said tube. Rouleau selon la revendication 22, caractérisé en ce que l'aspiration se faisant sensiblement selon l'axe du rouleau par les extrémités du rouleau, la zone (116A) perméable à l'air du tube est constituée de perforations dont la taille et/ou la densité varie progressivement de manière à créer une aspiration homogène sur toute la longueur de la zone perméable.Roller according to Claim 22, characterized in that the suction taking place substantially along the axis of the roller through the ends of the roller, the air-permeable zone (116A) of the tube consists of perforations the size and / or the density varies gradually so as to create a uniform suction over the entire length of the permeable zone. Rouleau selon la revendication 22 ou 23, caractérisé en ce que la zone (116A) perméable à l'air présente un rayon de courbure plus petit que le rayon de courbure de la zone (116B) formant déflecteur, de manière à créer une pré-chambre d'homogénéisation entre la paroi cylindrique du rouleau et la zone perméable (116A).Roller according to claim 22 or 23, characterized in that the air-permeable zone (116A) has a smaller radius of curvature than the radius of curvature of the deflector zone (116B), so as to create a pre- homogenization chamber between the cylindrical wall of the roller and the permeable zone (116A). Rouleau selon l'une des revendications 22 à 24, caractérisé en ce que les moyens pour créer une aspiration progressivement plus importante dans une partie d'étendue angulaire de la zone d'aspiration comprennent des perforations dans cette partie de taille et/ou de densité plus grande, de préférence progressivement, par rapport au reste de la zone perméable.Roller according to one of claims 22 to 24, characterized in that the means for creating a progressively greater suction in a part of angular extent of the suction zone comprise perforations in this part of size and / or density larger, preferably gradually, relative to the rest of the permeable area.
EP03291165A 2002-05-28 2003-05-20 Suction roller for processing a sheet of textile fibres or an equivalent product Expired - Lifetime EP1367165B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0206468 2002-05-28
FR0206468A FR2840325B1 (en) 2002-05-28 2002-05-28 SUCTION ROLLER FOR THE TREATMENT OF A TEXTILE FIBER SHEET OR EQUIVALENT PRODUCT

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EP1367165A1 true EP1367165A1 (en) 2003-12-03
EP1367165B1 EP1367165B1 (en) 2009-08-26

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AT (1) ATE440988T1 (en)
DE (1) DE60328942D1 (en)
FR (1) FR2840325B1 (en)

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KR100815990B1 (en) 2006-12-18 2008-03-24 이규환 Rotary vacuum suction roller for broad cloth processing
EP3168337A1 (en) * 2015-11-10 2017-05-17 Oskar Dilo Maschinenfabrik KG Device for guided transport of a fibre web
US20210394466A1 (en) * 2020-06-23 2021-12-23 The Boeing Company Automated Removal Apparatus, System, and Method for Selectively Removing Trimmed Portions of a Laminated Ply in a Ply-by-Ply Fabrication Process
CN114435665A (en) * 2021-12-31 2022-05-06 山东宏业纺织股份有限公司 Integrative processingequipment of comb and parallel cotton fibers prior to spinning packing
CN115990570A (en) * 2023-03-16 2023-04-21 宁德时代新能源科技股份有限公司 Air-float roller and pole piece coating device

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US6050469A (en) * 1995-03-22 2000-04-18 Thibeau Et Cie Suction cylinder which transfers fiber web from a conveyer belt to two calendering cylinders

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US3616007A (en) * 1969-02-28 1971-10-26 Kimberly Clark Co Method for controlling and transferring crosslaid sheets
US4809404A (en) * 1987-03-28 1989-03-07 Hergeth Hollingsworth Gmbh Apparatus for compacting a nonwoven fabric, etc.
US6050469A (en) * 1995-03-22 2000-04-18 Thibeau Et Cie Suction cylinder which transfers fiber web from a conveyer belt to two calendering cylinders

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100815990B1 (en) 2006-12-18 2008-03-24 이규환 Rotary vacuum suction roller for broad cloth processing
EP3168337A1 (en) * 2015-11-10 2017-05-17 Oskar Dilo Maschinenfabrik KG Device for guided transport of a fibre web
CN106939449A (en) * 2015-11-10 2017-07-11 奥斯卡迪罗机械制造公司 Device for the guiding transmission of net cotton
US9751696B2 (en) 2015-11-10 2017-09-05 Oskar Dilo Maschinenfabrik Kg Device for a guided transport of a card web
CN106939449B (en) * 2015-11-10 2019-06-14 奥斯卡迪罗机械制造公司 The device of guidance transmission for net cotton
US20210394466A1 (en) * 2020-06-23 2021-12-23 The Boeing Company Automated Removal Apparatus, System, and Method for Selectively Removing Trimmed Portions of a Laminated Ply in a Ply-by-Ply Fabrication Process
US11919261B2 (en) * 2020-06-23 2024-03-05 The Boeing Company Automated removal apparatus, system, and method for selectively removing trimmed portions of a laminated ply in a ply-by-ply fabrication process
CN114435665A (en) * 2021-12-31 2022-05-06 山东宏业纺织股份有限公司 Integrative processingequipment of comb and parallel cotton fibers prior to spinning packing
CN114435665B (en) * 2021-12-31 2024-03-12 山东宏业纺织股份有限公司 Integrative processingequipment of comb and parallel cotton fibers prior to spinning packing
CN115990570A (en) * 2023-03-16 2023-04-21 宁德时代新能源科技股份有限公司 Air-float roller and pole piece coating device
CN115990570B (en) * 2023-03-16 2023-08-04 宁德时代新能源科技股份有限公司 Air-float roller and pole piece coating device

Also Published As

Publication number Publication date
ATE440988T1 (en) 2009-09-15
FR2840325B1 (en) 2004-07-30
DE60328942D1 (en) 2009-10-08
EP1367165B1 (en) 2009-08-26
FR2840325A1 (en) 2003-12-05

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