EP1367166A1 - Movable carriage at the entrance to a cross lapper and cross lapper equipped with such a carriage - Google Patents

Movable carriage at the entrance to a cross lapper and cross lapper equipped with such a carriage Download PDF

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Publication number
EP1367166A1
EP1367166A1 EP03291166A EP03291166A EP1367166A1 EP 1367166 A1 EP1367166 A1 EP 1367166A1 EP 03291166 A EP03291166 A EP 03291166A EP 03291166 A EP03291166 A EP 03291166A EP 1367166 A1 EP1367166 A1 EP 1367166A1
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EP
European Patent Office
Prior art keywords
suction
roller
web
trolley according
carriage
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
EP03291166A
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German (de)
French (fr)
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EP1367166B1 (en
Inventor
François LOUIS
Hugues Leroy
Didier Lebloas
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Andritz Asselin Thibeau SAS
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Asselin SA
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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
    • D04H1/70—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 mobile spreader-entry input carriage and a crosslapper equipped with said carriage.
  • the invention aims, in a mobile carriage spider-lapper input, flipping a web or fiber product equivalent, with its transfer between a moving arrival conveyor belt full (as opposed to breathable) and a solid mobile receiving mat.
  • the reversal of the veil is performed in a carriage moving back and forth said entry trolley.
  • the veil is guided on a carpet full of arrival making a U-turn to start in the opposite direction and a carpet full receiver comes back to the veil after flipping and pinching against the first full carpet.
  • the length of the pinch area can be modified by moving the carriage back and forth. This allows to absorb the gap between the continuous arrival of the veil on a solid carpet and the unwinding of the veil from a moving output carriage back and forth above a perpendicular receiving plate moving continuously and on which is formed the web constituted by the folded web.
  • patent EP 0 517 563 it has been proposed as a solution of guide in the mobile entrance trolley the veil on an inclined section of carpet before approaching the turn, so that this turn is less than 180 °, and also to create a line of nipping of the veil in the bend between full mat of arrival and receiver thanks to an appropriate arrangement of guide rollers of the full conveyor belt.
  • the present invention aims to propose another solution again which allows an improvement of the stability of the transport of a veil or equivalent product at the time of its reversal before to be supported in reverse by the receiving mobile carpet.
  • the air contained in the veil has the possibility to escape radially instead of escaping laterally. This has the effect that the veil does not undergo floating disturbing its homogeneity and its transport.
  • the veil is correctly controlled during its reversal in the mobile carriage of entry of the spreader-lapper, this which makes it possible to increase the speed of movement back and forth of the carriage without deforming the veil and thus increasing the speed of production of tablecloth.
  • the better control of the sail makes it possible to reduce its stretching in the crosslapper to maintain at the exit of the crosslapper the quality of the veil provided by the card.
  • conservation the weight of the veil provided by the card makes it possible to reduce the number of folds of the tablecloth and also increase production. This is particularly interesting for a condensed veil.
  • the invention makes it possible to coat the sail with the condensation rate adapted to respect the MD / CD (resistance sense machine / transversal direction) desired while maintaining the quality of the tablecloth final and increasing the productivity of the facility.
  • the fact of letting the air escape radially according to the invention can by elsewhere have an additional effect of consolidation on the veil in causing compaction or even interlacing of fibers. So out of the spreader-lapper the web may be less thick than in the state of the technique, which facilitates the entry into a next machine, for example in a needling machine.
  • the consolidation of the veil also has the effect advantageous to reduce the frequency of machine cleaning since fibers are better held in the veil and do not scatter in the machine.
  • the air is evacuated radially inward of the curvature corresponding to the upturn of the veil, the air-permeable means being constituted for example by a roll whose surface is permeable to air on which the veil is transferred to make it turn around before being put on the carpet receiver.
  • the permeable roll is a roll of maintaining suction, the roller being hollow connected to a suction source.
  • the roller is thus adapted to maintain the veil by suction during its flipping and then releasing it on the receiver mat.
  • deflection means are for example arranged inside the roller aspirant.
  • the guide means of the receiving mats are positioned so that said carpet forms a dam in view of said suction roller to the phenomena of compression and depression due to displacement of said carriage back and forth. This can be important in the case of extreme speeds.
  • the suction roll can be advantageously rotated by coupling with a guide roller belonging to the guide means of the carpet receiver. This makes it possible to bring the veil automatically to the same speed as the receiving carpet.
  • the cylindrical wall of the suction roll can be smooth, that is to say without relief, provided with perforations forming the suction orifices.
  • She can also be conformed with reliefs, such as grooves or staggered holes, so that the suction ports open not directly on the outside of the roll but in at least one chamber depression formed in the cylindrical wall between support zones for the veil. Thanks to this or these depression chambers, the air present in the textile veil is actually sucked radially towards the inside of the roller but the veil remains guided on the support zones without being in contact with suction ports. This eliminates the risks of training and hooking fibers in the suction ports.
  • depression chambers due to their function, are larger larger than the suction ports, which means that the sail area sucked to the right of depression chambers between areas support is increased compared to the state of the art, while retaining for the roller a good mechanical strength.
  • This advantage is important for most applications where the suction roll is a wear part.
  • a perforated fluted roller according to the invention more 90% of the surface of the textile product can be exposed to suction against less than 40% with a conventional perforated roll.
  • the crests of the grooves extend perpendicularly to the direction of the fibers of the web.
  • the flutes can thus be for example circumferential, that is to say perpendicular to the axis of revolution of the roll, axial, that is to say parallel to the axis of revolution of the roll, helical or describing two reverse propellers meeting substantially in the central part of the roller. This last configuration has the additional effect of if necessary, counteract lateral stretching of the veil.
  • the pitch of the grooves or the spacing of the perforations, as well as the depth of the splines 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 roll, ie in the area passing 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 roll.
  • the means of deflection may include two radial deflectors with possibly one variable angular spacing or an arched deflector possibly from variable arc length telescopically.
  • the roller according to the invention can be manufactured for example from sheet metal which is pierced by 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 of aluminum which is then subjected to a surface treatment electrochemical to harden it, or a material based on carbon fibers or steel.
  • the fibers are short and very volatile, can provide to put on the breathable roll a textile sleeve for example knitted or a microperforated thin sheet, the roll bringing the bearing mechanical structure.
  • the air has the possibility of escaping radially outward of the curvature corresponding to the reversal of the veil, said curvature being effected by the veil on the carpet full of mobile arrival, for example around a roller for guiding, and the means permeable to air are constituted for example a convex perforated plating wall disposed opposite said roller guidance.
  • the veil is thus guided in the curvature between said wall of convex perforated veneer and the arrival carpet full to be deposited only when leaving the turn on the receiving mobile carpet.
  • the veil in the curvature, it is under the effect of the centrifugal force that the veil can be plated on the convex perforated wall and not by suction, and the air contained in the web can then escape radially where appropriate through said wall.
  • the perforated wall is consisting of an endless perforated belt continuously moved, of which one zone is adapted to fit the outside of the curvature effected by the veil.
  • Figure 1 shows schematically and partly an example prior art crosslapper in which a transfer takes place sail between two full carpets.
  • the veil 1 arrives continuously on a first full carpet endless 2, then, in a moving entrance cart back and forth 3 where he makes a U-turn to be picked up by a second full mat Endless 4 continuously fed into said carriage 3 with an opposite direction to the arrival direction of the first full carpet 2.
  • the 1 is pinched between the two full mats 2 and 4.
  • the veil 1, and maintained by pinching in a zone P, is then taken up by a second mobile carriage called output 5, whose function is to spread the veil back and forth on an apron 6 moving continuously perpendicular to the moving the output carriage 5 so as to form a tablecloth consisting of staggered folds.
  • the input carriage 3 has the function of rendering compatible, by varying the length of the pinch zone, the arrival continuously the veil on the first carpet 2 with the unwinding of the veil to the output of the output carriage 5, the unwinding varying according to the position of the carriage 5 and the opposite direction or no advance of the carriage 5 relative to the the direction of advance of the web on the carpet 2.
  • the carpet full 2 is guided by two guide rollers 7 and 8 carried by the carriage mobile 3 defining an inclined section 9 so that the sail 1 transported by this carpet then performs around the second roll 8 a turn that is less than 180 °.
  • the path of the second full carpet 4 is defined by four rolls of 10, 11, 12 and 13 carried by the input carriage 3 and arranged on the one hand that a pinch line 14 is formed between the guide roller 8 of the first belt 2 around which the sail 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 belt 4 is brought close to the roll 8 to resume the veil 1 at its output.
  • FIG. 2 shows a mobile spreader-entry input carriage. according to the invention that can replace the carriage 3 described above (the The same references are used below for the elements common to two figures).
  • the first solid carpet 2 reverses around three guide rollers driven in the same direction: a roller upper 20, an intermediate roll 21 and a lower roll 22.
  • the intermediate roller 21 is placed so as to define in section a turn in point for the carpet 2 with an inclined portion 23 before the roller 21 and an inclined portion 24 after the roller 21.
  • the second solid carpet 4 is guided for its part in the mobile carriage 3 by three guide rollers: the carpet is guided in "S" around an upper roller 41, then around a intermediate roller 42 driven in reverse and then a lower roller 43 bringing the carpet 4 to the appropriate level with respect to the solid carpet 2 for realize the pinching zone P defined between the two mobile carriages entry and exit. All guide rollers are attached to the chassis of the trolley and driven automatically in rotation with the displacement of matching carpet. According to the invention, a suction roller 31, attached to the chassis of the carriage 3, is 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 on the periphery of the suction roller is substantially tangential and minimizing the vacuum distance d between the intermediate roller 21 and the transfer roller 31 and also for the transfer of the veil of the roller 31 is done then closer in the plane of the second full carpet 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 carpet 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 meaning after the reversal of the veil and especially advantageously to the same speed.
  • the solid carpet 4 can dam the phenomena of compression or depression due to the displacement of trolley; this can be recommended in extreme cases of speed.
  • the cylindrical wall of the roller 31 is permeable to air and connected laterally to a controlled suction source to maintain the veil during its reversal.
  • the means used to feed the suction roll 31 with a movable suction may comprise a onboard blower, or a system of flexible or telescopic hoses connected to a fixed fan, or a connection nozzle connected to a suction manifold.
  • Deflection means schematized by the deflector arcuate 46 allow to define an effective suction zone in the curvature made by the veil.
  • FIG. 3 shows a variant embodiment according to which, the veil 1 is transferred not directly to the suction roll 31 but on a 50 endless perforated belt mounted around the suction roller 31 and two guide rollers 51 and 52 arranged opposite the carpet portion full inclined 23 close respectively guide rollers 21 and 22.
  • This construction makes it possible to limit the area of vacuum between the roll aspirant 31 and the carpet 2 in which the web is not controlled.
  • Figure 4 shows another variant of embodiment still in which uses an "S" configuration for the solid carpet 2 with the provision of an additional guide roller 53 in a plane rear of the two guide rollers 21 and 22, which allows these two guide rollers 21 and 22 to be approached closer to the roller aspirant 31 and thus reduce the empty spaces between the carpet 2 and the 31.
  • FIG. 4 there is also shown alternatively a substantially straight arrival of the carpet 4 guided in the mobile carriage 3 by the least one guide roller 54.
  • a variant is also shown. right arrival of the carpet 2 with the removal of the inclined portion 23.
  • FIG. 5 shows another variant of a trolley embodiment input-splitter input 3 implementing a second roll aspirant 60 according to the invention placed above the veil 1, before its turning, between the belt 2 and the roller 31 to further control the sail in the vacuum zone between them.
  • the carpet 2 is guided around a first guide roller 61 and a second guide roller 62, between which is defined a portion of carpet inclined 63 so that the belt 2 then turns on the roller 62 turning over less than 180 °.
  • This inclined portion allows also a transfer over a larger angular range of suction of the upper suction roll 60.
  • the transfer of the suction roll 60 on the turning roller 31 is performed through the relative positioning of active areas of aspiration.
  • the carpet 4 is guided next to the rollers aspirants 60 and 31 around two upper guide rollers 64 and lower 65 so as to describe an "S" path.
  • this configuration allows to couple the guide roller 64 and the roller aspirant 60 and the guide roller 65 and the suction roller 31 for the to train together.
  • FIGS 6 to 13 describe embodiments of roll aspirant that can be applied to the invention.
  • a suction roll 100 is hollow having a cylindrical wall provided on its outer surface of grooves 102 here axial extending over the length of the roller and two opposite side walls 100A, 100B.
  • Each flute 102 can be defined by a crest 103 framed by two funds 104, each bottom 104 being made permeable to air through orifices suction device 105 of suitable shape and density according to the applications targeted according to the density of the veil or equivalent product in contact with the suction roll.
  • a perforated axial tube 106 is arranged inside the roll 100 protruding on both sides of its side walls 100A, 100B, the ends of the tube 106 being connected with known manner to an external source of suction.
  • the roll 100 is adapted to be rotated relative to the tube 106 along an axis A of rotation thanks to appropriate ball bearings R
  • the suction zone effective (107 in Figure 6), at the entrance 109 of which a veil of fibers 108 is supported by the roll 100 and at the exit 110 of which the sail is released, is delimited here by two radial deflectors 111A and 111B which are connected to the axial tube 106.
  • These deflectors can be advantageously provided with means for adjusting their spacing (illustrated by arrows F) so as to be able to adjust the angular extent of the zone 107.
  • the tube 106 is perforated on the side only of the suction zone 107.
  • the blanks 110A, 110B facing one another neighbor grooves 102 deviate from the common bottom 104 towards the outside of the roll, so that when the inside of the roll is depressed, a chamber of depression C is formed between the bottom 104 of the grooves and the two ridges adjacent ones providing a suction surface between two ridges 103 widened by relative to the outlet section of the orifice 105 and offset relative thereto.
  • the suction force is adjusted, in particular according to the speed of scrolling the veil 108, so that it is maintained and guided on the ridges 103 thanks to the vacuum chamber C. A increased suction with the scrolling speed can allow to to compensate the centrifugal force.
  • the air present in the sail 108 is sucked radially where appropriate inside the roll by the orifices 105 (shown schematically by the arrows F2). Thanks to the presence of the vacuum chamber C, the fibers of the veil are thus not in contact holes 105 and unlikely to come to block them.
  • a triangular shape in section splines as in Figures 7 and 8 allows advantageously to further increase the suction area of the chambers of depression C and thus to suck the veil on practically all its surface while maintaining good mechanical strength for the roll.
  • the ridges 103 of the grooves are advantageously rounded as shown also in FIGS. 7 and 8. Furthermore, the bottom 104 of the grooves is widened relative to the ridges 103 of the grooves for to be able to increase the size of the orifices 105 and thus the suction force.
  • the torn portion shows the means to homogenize the suction carried out laterally, constituted by perforations of the tube 106 progressively elongated from the sides of the roll to the center of it.
  • orifices 105 which are provided aligned from one flute bottom 104 to another in Figure 8, but which could be also staggered from a flute bottom to a other.
  • the shape of the orifices 105 may also vary, either homogeneous over the length of the roll, either inhomogeneous to create an effect desired suction, such as homogenization or concentration.
  • the cross section of the flutes can be trapezoidal, with the small side of the trapezoid corresponding to the ridge of groove, so as to enlarge the support surfaces of the sail when necessary.
  • the following values may be given as a purely indicative: a roll diameter of the order of one or more hundreds of mm and a depth and a flute pitch of the order of a few mm.
  • FIGS. 10 and 11 a second embodiment of FIG. realization of the perforated cylindrical wall.
  • 200 circular and two-stage perforations are formed in the wall cylindrical, comprising a lower stage constituted by an orifice suction 205 opening into an upper floor of more dimensions large than the orifice 205 forming the vacuum chamber C.
  • 203 for a veil are thus formed on the surface of the wall between the perforations 200, said support zones being more or less large according to the spacing of the perforations.
  • the shape of the room depression C can be conical or substantially parallelepipedic like shown in Figure 11, with a suction port in its bottom.
  • FIGS. 12 and 13 show two variants of embodiment 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 a setting of the support angle of the veil by the suction roller and thus to cover several mounting configurations with the same roller design.
  • a same adjustable suction roller can be used to transfer a veil between a card and a lapper from any angle formed between the incoming carpet and the carpet coming out.
  • this is a tube 116 inserted inside the suction roll 100 and having a an air permeable arcuate zone 116A and an arcuate zone of deflection 116B having a greater radius of curvature than that of the permeable wall zone 116A for plugging the suction ports 105 of the roll, the two zones 116A and 116B being connected by radial walls 117 and 118.
  • a homogenous vacuum pre-chamber 119 is thus created. between the deflector 116A and the roll 100.
  • the deflector 116A then ensures a diffuser function so as to homogenize the depression in this pre-chamber over the entire length of the suction roll.
  • FIG. 14 illustrates another possible embodiment of the trolley mobile device according to the invention in which the holding means permeable to the air are adapted to chase the air present in the web radially towards the outside of the turn.
  • the carpet 2 which makes a reversal to the veil using at least one guide roller (such as 60) attached to the frame of the mobile carriage.
  • the means permeable to air are defined by an endless perforated belt 61 which is fed through rolls of placed in the chassis of the trolley near the carpet 2, in the bend that the sail must make around the roll 60, and so that the web is guided between the roller 60 and this perforated belt 61 in the 180 ° turn defined by said roller.
  • the guide rollers are four in number, two of which guide rollers 62 and 63 between which the perforated belt 61 is brought to close to the solid carpet 2 with a curvature matching the maximum turn that the veil must perform. It is in this portion located between two rollers 62 and 63 that the veil can be plated and the air chased radially inside the perforated belt 61.
  • FIG. 15 an embodiment is shown works a breathable roll 70.
  • the complete carpet of arrival 2 is here guided on guide rollers 21, 53 and 22 as in the embodiment of Figure 4.
  • the roller 70 is also placed in the carriage as the roller 31 of Figure 4, so that the web 1 is transferred to him to perform his turnaround.
  • the difference here lies in the fact that the roller 70 is simply breathable and non-aspirating and it is the full 4 receiver mat that is guided around two guide rollers 71 and 72 so as to form a plating wall for the veil behind the permeable roll 70.
  • the air can thus escape radially inwards of the roller 70.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Advancing Webs (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Catching Or Destruction (AREA)

Abstract

The reciprocating mobile inlet carriage (3), in which a textile fibre mat (1) is turned round as it is transferred from a feed conveyor (2) to a receiving conveyor (4), has inner guides (21, 22, 53) that allow the feed conveyor to make a half-turn, and other guides (54) that enable the receiving conveyor to travel in the same direction as the feed conveyor once it has made its half-turn. The carriage has air-permeable supports on a roller (31) round which the mat turns and designed to evacuate air radially from it, while the inner guides take the feed conveyor in a half turn inside the curve created by the roller, which is hollow and connected to a suction source.

Description

La présente invention concerne un chariot mobile d'entrée d'étaleur-nappeur et un étaleur-nappeur équipé dudit chariot.The present invention relates to a mobile spreader-entry input carriage and a crosslapper equipped with said carriage.

De manière plus particulière, l'invention vise, dans un chariot mobile d'entrée d'étaleur-nappeur, le retournement d'un voile ou produit fibreux équivalent, avec son transfert entre un tapis de transport d'arrivée mobile plein (par opposition à perméable à l'air) et un tapis récepteur mobile plein.More particularly, the invention aims, in a mobile carriage spider-lapper input, flipping a web or fiber product equivalent, with its transfer between a moving arrival conveyor belt full (as opposed to breathable) and a solid mobile receiving mat.

L'utilisation de supports mobiles pleins pour transporter un voile fibreux a pour avantage d'éviter que les fibres ne s'accrochent à d'éventuelles perforations, cela abímant le voile, réduisant la vitesse du voile et nécessitant un nettoyage fréquent du support. En revanche, avec des moyens de transport pleins, on peut rencontrer des difficultés dans la stabilité du transport du voile parce qu'il est léger contenant une grande quantité d'air. Ces difficultés se rencontrent plus particulièrement lorsque l'on souhaite changer la direction du voile et qu'il est soumis à une force centrifuge dans le virage correspondant, notamment lorsque le voile doit être retourné complètement pour par exemple repartir en sens inverse. Cette situation se rencontre notamment dans un étaleur-nappeur comme expliqué ci-après.The use of solid mobile stands to carry a sail fiber has the advantage of preventing the fibers from clinging to possible perforations, this damaging the veil, reducing the speed of sail and requiring frequent cleaning of the support. On the other hand, with means of transport, there may be difficulties in stability of the veil transport because it is lightweight containing a large amount of air. These difficulties are encountered more particularly when we want to change the direction of the veil and that it is subjected to a force centrifuge in the corresponding turn, especially when the sail must to be completely turned over for example to start in the opposite direction. This situation occurs in particular in a crosslapper as explained below.

Selon un type connu d'étaleur-nappeur, notamment décrit dans le brevet EP 0 517 563, le retournement du voile est effectué dans un chariot mobile en va-et-vient dit chariot d'entrée. Le voile est guidé sur un tapis plein d'arrivée faisant un demi-tour pour repartir en sens inverse et un tapis plein récepteur vient reprendre le voile après retournement et le pincer contre le premier tapis plein. La longueur de la zone de pincement peut être modifiée en déplaçant en va-et-vient le chariot d'entrée. Cela permet d'absorber le décalage entre l'arrivée en continu du voile sur un tapis plein et le dévidage du voile à partir d'un chariot de sortie mobile en va-et-vient au dessus d'un tablier récepteur perpendiculaire se déplaçant en continu et sur lequel se forme la nappe constituée du voile plié.According to a known type of crosslapper, in particular described in patent EP 0 517 563, the reversal of the veil is performed in a carriage moving back and forth said entry trolley. The veil is guided on a carpet full of arrival making a U-turn to start in the opposite direction and a carpet full receiver comes back to the veil after flipping and pinching against the first full carpet. The length of the pinch area can be modified by moving the carriage back and forth. This allows to absorb the gap between the continuous arrival of the veil on a solid carpet and the unwinding of the veil from a moving output carriage back and forth above a perpendicular receiving plate moving continuously and on which is formed the web constituted by the folded web.

L'inconvénient largement connu de cette configuration provient du fait que, lorsque le voile effectue son retournement, il subit une force centrifuge avec pour conséquence qu'il a tendance à décoller du tapis ce qui affecte par la suite l'homogénéité de la nappe formée. Le voile est également soumis à sa propre inertie due à sa vitesse de transport relative au chariot. Dans un étaleur-nappeur, 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.The widely known disadvantage of this configuration comes from the fact that, when the veil does its turning, it undergoes a force centrifugal with the consequence that it tends to take off from the carpet which subsequently affects the homogeneity of the formed web. The veil is also subject to its own inertia due to its relative transport speed to the cart. In a crosslapper, the reversal of the veil in the entrance trolley is therefore one of the critical moments when the veil risks to take off and deform.

La réduction de la vitesse de l'étaleur-nappeur en fonction du type de voile (densité et type de fibres) permet de limiter le flottement du voile et donc d'obtenir une nappe de bonne qualité. Cela n'est pas satisfaisant car pour certains voiles, par exemple faits de fibres volatiles et/ou courtes, les vitesses doivent être très réduites limitant fortement le taux de production de nappe. D'autre part, on sait qu'une carde peut produire un voile à grande vitesse et qu'augmenter la vitesse de l'étaleur-nappeur permettrait d'augmenter la production générale de nappe.Reducing the speed of the spreader-lauter according to the type of sail (density and type of fibers) makes it possible to limit the floating of the sail and so to get a good quality tablecloth. This is not satisfactory because for some sails, for example made of volatile and / or short fibers, speeds must be very small, greatly limiting the production rate of tablecloth. On the other hand, we know that a card can produce a large veil speed and that increasing the speed of the spreader-lapper to increase the general production of groundwater.

Une autre solution consiste à tendre le voile à l'entrée de l'étaleur-nappeur en créant une différence de vitesses entre l'étaleur-nappeur et la machine précédente. Toutefois, cela entraíne un étirage du voile et donc une perte de qualité nécessitant un nombre de plis plus important dans la nappe.Another solution is to stretch the veil at the entrance of the crosslapper by creating a velocity difference between the crosslapper and the previous machine. However, this results in a stretching of the veil and therefore a loss of quality requiring a greater number of folds in the tablecloth.

Une autre solution encore consiste à disposer une paroi de plaquage derrière le voile lorsqu'il effectue son retournement sur le tapis d'arrivée. Toutefois, on constate que l'air présent dans le voile s'échappe latéralement entraínant une déformation latéralement du voile et donc également une perte de qualité.Yet another solution is to have a plating wall behind the veil as he rolls over the finish mat. However, it can be seen that the air present in the web escapes laterally resulting in a lateral deformation of the veil and therefore also a loss of quality.

Dans le brevet EP 0 517 563, il a été proposé comme solution de guider dans le chariot mobile d'entrée le voile sur un tronçon incliné de tapis avant d'aborder le virage, de sorte que ce virage soit inférieur à 180°, et également de créer une ligne de pincement du voile dans le virage entre les tapis pleins d'arrivée et récepteur grâce à une disposition appropriée de rouleaux de guidage du tapis plein récepteur.In patent EP 0 517 563, it has been proposed as a solution of guide in the mobile entrance trolley the veil on an inclined section of carpet before approaching the turn, so that this turn is less than 180 °, and also to create a line of nipping of the veil in the bend between full mat of arrival and receiver thanks to an appropriate arrangement of guide rollers of the full conveyor belt.

La présente invention a pour but de proposer une autre solution encore qui permette une amélioration de la stabilité du transport d'un voile ou produit équivalent au moment où il effectue son retournement avant d'être pris en charge en sens inverse par le tapis mobile récepteur.The present invention aims to propose another solution again which allows an improvement of the stability of the transport of a veil or equivalent product at the time of its reversal before to be supported in reverse by the receiving mobile carpet.

Elle propose un chariot d'entrée d'étaleur-nappeur mobile en va-et-vient, dans lequel un voile de fibres textiles effectue un retournement en étant transféré d'un tapis plein d'arrivée mobile sur un tapis récepteur mobile plein, comportant des premiers moyens de guidage permettant au tapis plein d'effectuer un demi-tour et des second moyens de guidage permettant au tapis récepteur d'être amené selon la même direction que le tapis plein d'arrivée après son demi-tour, caractérisé par des moyens de maintien du voile perméables à l'air disposés dans une courbure réalisant le retournement dudit voile et adaptés à évacuer radialement l'air présent dans le voile.It offers a reciprocating spreader-entry trolley back and forth, wherein a web of textile fibers reverses being transferred from a carpet full of mobile arrival on a conveyor belt solid mobile device, comprising first guide means enabling the solid carpet to perform a half-turn and second guide means allowing the receiving belt to be brought in the same direction as the carpet full of arrival after its U-turn, characterized by means of maintaining the permeable veil disposed in a curvature embodying the reversal of said web and adapted to radially evacuate the air present in the veil.

Lorsqu'il effectue son retournement, l'air contenu dans le voile a la possibilité de s'échapper radialement au lieu de s'échapper latéralement. Cela a pour effet que le voile ne subit pas de flottement perturbant son homogénéité et son transport.When it performs its turnaround, the air contained in the veil has the possibility to escape radially instead of escaping laterally. This has the effect that the veil does not undergo floating disturbing its homogeneity and its transport.

Ainsi, grâce à 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. En particulier, le meilleur contrôle du voile permet de diminuer son étirage dans l'étaleur-nappeur afin de conserver à la sortie de l'étaleur-nappeur la qualité du voile fourni par la carde. Par ailleurs, la conservation du poids du voile fourni par la carde permet de réduire le nombre de plis de la nappe et d'augmenter également la production. 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.Thus, thanks to the invention, the veil is correctly controlled during its reversal in the mobile carriage of entry of the spreader-lapper, this which makes it possible to increase the speed of movement back and forth of the carriage without deforming the veil and thus increasing the speed of production of tablecloth. In particular, the better control of the sail makes it possible to reduce its stretching in the crosslapper to maintain at the exit of the crosslapper the quality of the veil provided by the card. Moreover, conservation the weight of the veil provided by the card makes it possible to reduce the number of folds of the tablecloth and also increase production. This is particularly interesting for a condensed veil. Indeed, the invention makes it possible to coat the sail with the condensation rate adapted to respect the MD / CD (resistance sense machine / transversal direction) desired while maintaining the quality of the tablecloth final and increasing the productivity of the facility.

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.Moreover, thanks to the invention, it has been found that the control of sails based on short and volatile fibers such as viscose, was possible, allowing in some cases to triple the production of the crosslapper.

Le fait de laisser échapper l'air radialement 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 et ne s'éparpillent pas dans la machine.The fact of letting the air escape radially according to the invention can by elsewhere have an additional effect of consolidation on the veil in causing compaction or even interlacing of fibers. So out of the spreader-lapper the web may be less thick than in the state of the technique, which facilitates the entry into a next machine, for example in a needling machine. The consolidation of the veil also has the effect advantageous to reduce the frequency of machine cleaning since fibers are better held in the veil and do not scatter in the machine.

Selon un mode de réalisation possible de l'invention, l'air est évacué radialement vers l'intérieur de la courbure correspondant au retournement du voile, les moyens perméables à l'air étant constitués par exemple d'un rouleau dont la surface est perméable à l'air sur lequel le voile est transféré pour qu'il effectue son retournement avant d'être déposé sur le tapis récepteur.According to a possible embodiment of the invention, the air is evacuated radially inward of the curvature corresponding to the upturn of the veil, the air-permeable means being constituted for example by a roll whose surface is permeable to air on which the veil is transferred to make it turn around before being put on the carpet receiver.

Dans une première variante, grâce à une disposition appropriée des moyens de guidage, on forme avantageusement avec le tapis récepteur plein une paroi de maintien sur l'extérieur de la courbure effectuée par le voile autour du rouleau perméable, de sorte que le voile peut être plaqué contre cette paroi lors de son retournement avec la possibilité pour l'air contenu dans le voile de s'échapper alors radialement vers l'intérieur du rouleau grâce la perméabilité de sa paroi. In a first variant, thanks to an appropriate provision of guiding means, it is advantageously formed with the receiving belt full wall holding on the outside of the curvature made by the sail around the permeable roll, so that the veil can be veneered against this wall during its reversal with the possibility for air contained in the web then escape radially inward of the roll thanks to the permeability of its wall.

Dans une seconde variante, le rouleau perméable est un rouleau de maintien aspirant, le rouleau étant creux relié à une source d'aspiration. Le rouleau est adapté ainsi à maintenir le voile par aspiration lors de son retournement puis à le relâcher sur le tapis récepteur. Pour définir la zone d'aspiration, correspondant sensiblement à la courbure suivie par le voile, des moyens de déflection sont par exemple disposés à l'intérieur du rouleau aspirant.In a second variant, the permeable roll is a roll of maintaining suction, the roller being hollow connected to a suction source. The roller is thus adapted to maintain the veil by suction during its flipping and then releasing it on the receiver mat. To set the zone suction, corresponding substantially to the curvature followed by the veil, deflection means are for example arranged inside the roller aspirant.

Selon des particularités avantageuses, les moyens de guidage du tapis récepteur sont positionnés de sorte que ledit tapis forme un barrage en regard dudit rouleau aspirant aux phénomènes de compression et de dépression dus au déplacement dudit chariot en va-et-vient. Ceci peut être important dans le cas de vitesses extrêmes. Par ailleurs, le rouleau aspirant peut être avantageusement entraíné en rotation grâce à un couplage avec un rouleau de guidage appartenant aux moyens de guidage du tapis récepteur. Ceci permet d'amener le voile automatiquement à la même vitesse que le tapis récepteur.According to advantageous features, the guide means of the receiving mats are positioned so that said carpet forms a dam in view of said suction roller to the phenomena of compression and depression due to displacement of said carriage back and forth. This can be important in the case of extreme speeds. Moreover, the suction roll can be advantageously rotated by coupling with a guide roller belonging to the guide means of the carpet receiver. This makes it possible to bring the veil automatically to the same speed as the receiving carpet.

La paroi cylindrique du rouleau aspirant peut être lisse, c'est à dire sans relief, munie de perforations formant les orifices d'aspiration. Elle peut également être conformée avec des reliefs, tels que des cannelures ou perforations étagées, de sorte que les orifices d'aspiration débouchent non pas directement sur l'extérieur du rouleau mais dans au moins une chambre de dépression formée dans la paroi cylindrique entre des zones d'appui pour le voile. Grâce à cette ou ces chambres 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, la ou 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 de voile aspiré 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 plus part des applications où le rouleau aspirant constitue une pièce d'usure. Avec un rouleau cannelé perforé 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.The cylindrical wall of the suction roll can be smooth, that is to say without relief, provided with perforations forming the suction orifices. She can also be conformed with reliefs, such as grooves or staggered holes, so that the suction ports open not directly on the outside of the roll but in at least one chamber depression formed in the cylindrical wall between support zones for the veil. Thanks to this or these depression chambers, the air present in the textile veil is actually sucked radially towards the inside of the roller but the veil remains guided on the support zones without being in contact with suction ports. This eliminates the risks of training and hooking fibers in the suction ports. In addition, the Depression chambers, due to their function, are larger larger than the suction ports, which means that the sail area sucked to the right of depression chambers between areas support is increased compared to the state of the art, while retaining for the roller a good mechanical strength. This advantage is important for most applications where the suction roll is a wear part. With a perforated fluted roller according to the invention, more 90% of the surface of the textile product can be exposed to suction against less than 40% with a conventional perforated roll.

De préférence, avec un rouleau cannelé, 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.Preferably, with a fluted roller, to improve the drive of the veil without hanging the fibers, it is ensured that the crests of the grooves extend perpendicularly to the direction of the fibers of the web. The flutes can thus be for example circumferential, that is to say perpendicular to the axis of revolution of the roll, axial, that is to say parallel to the axis of revolution of the roll, helical or describing two reverse propellers meeting substantially in the central part of the roller. This last configuration has the additional effect of if necessary, counteract lateral stretching of the veil.

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 the splines 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 roll, ie in the area passing 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 roll. The means of deflection may include two radial deflectors with possibly one variable angular spacing or an arched deflector possibly from variable arc length telescopically. One can also use a tube inserted inside the suction roll and comprising a zone permeable to the air 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.Aspiration being effected by the ends of the roll, several solutions can be implemented to homogenize the suction on the entire length of the roll, for example perforations of size and density increasing from the ends towards the central part of the roll aspirant itself, or the permeable zone of a deflector tube, or by the use of a piece of form whose section evolves 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.It is also advantageous to provide means for creating a progressively greater aspiration in an area of expanse chosen angle, for example where the centrifugal force is the most big. This can be achieved also by modifying the characteristics and the densities 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 manufactured for example from sheet metal which is pierced by 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 of aluminum which is then subjected to a surface treatment electrochemical to harden it, or a material based on carbon fibers or steel.

Dans les cas extrêmes où les fibres sont courtes et très volatiles, on peut prévoir d'enfiler sur le rouleau perméable à l'air un manchon en textile par exemple tricoté ou une tôle mince microperforée, le rouleau apportant la structure mécanique portante.In extreme cases where the fibers are short and very volatile, can provide to put on the breathable roll a textile sleeve for example knitted or a microperforated thin sheet, the roll bringing the bearing mechanical structure.

Selon un autre mode de réalisation encore de l'invention, l'air a la possibilité de s'échapper radialement vers l'extérieur de la courbure correspondant au retournement du voile, ladite courbure étant effectuée par le voile sur le tapis plein d'arrivée mobile, par exemple autour d'un rouleau de guidage, et les moyens perméables à l'air sont constitués par exemple d'une paroi de plaquage perforée convexe disposée en regard dudit rouleau de guidage. Le voile est ainsi guidé dans la courbure entre ladite paroi de placage perforée convexe et le tapis d'arrivée plein pour être déposé seulement en sortie de virage sur le tapis mobile récepteur. Dans ce mode de réalisation, dans la courbure, c'est sous l'effet de la force centrifuge que le voile peut être plaqué sur la paroi perforée convexe et non pas par aspiration, et l'air contenu dans le voile peut alors s'échapper radialement le cas échéant à travers ladite paroi. De préférence la paroi perforée est constituée d'un tapis perforé sans fin déplacé en continu, dont une zone est adaptée à épouser l'extérieur de la courbure effectuée par le voile.According to yet another embodiment of the invention, the air has the possibility of escaping radially outward of the curvature corresponding to the reversal of the veil, said curvature being effected by the veil on the carpet full of mobile arrival, for example around a roller for guiding, and the means permeable to air are constituted for example a convex perforated plating wall disposed opposite said roller guidance. The veil is thus guided in the curvature between said wall of convex perforated veneer and the arrival carpet full to be deposited only when leaving the turn on the receiving mobile carpet. In this mode realization, in the curvature, it is under the effect of the centrifugal force that the veil can be plated on the convex perforated wall and not by suction, and the air contained in the web can then escape radially where appropriate through said wall. Preferably the perforated wall is consisting of an endless perforated belt continuously moved, of which one zone is adapted to fit the outside of the curvature effected by the veil.

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 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 ;
  • les figures 14 et 15 sont des vues similaires aux figures 2-5 illustrant deux autres possibilités de réalisation du chariot selon l'invention.
The present invention will be better understood and other advantages will appear in the light of the following description of embodiments, description made with reference to the schematic drawings in which:
  • Figure 1 is a partial sectional elevational view illustrating a crosslapper of the state of the art to which the present invention can be applied;
  • FIG. 2 is a sectional view showing a first example of a mobile spreader entry carriage using a suction roll according to the invention;
  • Figures 3, 4 and 5 are similar to Figure 2 showing each an alternative embodiment of the carriage;
  • Figure 6 is a sectional view of an embodiment of a grooved suction roll according to the invention;
  • Figure 7 is an enlarged detail view of Figure 6;
  • Figure 8 is a schematic partial 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 roll according to the invention each illustrating an alternative embodiment of the deflection means;
  • Figures 14 and 15 are views similar to Figures 2-5 illustrating two other embodiments of the carriage according to the invention.

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 premier tapis plein 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 second tapis plein sans fin 4 amené en continu dans ledit chariot 3 avec une direction opposée à la direction d'arrivée du premier 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, 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 3 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 3, 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 3 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 prior art crosslapper in which a transfer takes place sail between two full carpets. The veil 1 arrives continuously on a first full carpet endless 2, then, in a moving entrance cart back and forth 3 where he makes a U-turn to be picked up by a second full mat Endless 4 continuously fed into said carriage 3 with an opposite direction to the arrival direction of the first full carpet 2. At the exit of the carriage 3, the 1 is pinched between the two full mats 2 and 4. The veil 1, and maintained by pinching in a zone P, is then taken up by a second mobile carriage called output 5, whose function is to spread the veil back and forth on an apron 6 moving continuously perpendicular to the moving the output carriage 5 so as to form a tablecloth consisting of staggered folds. The input carriage 3 has the function of rendering compatible, by varying the length of the pinch zone, the arrival continuously the veil on the first carpet 2 with the unwinding of the veil to the output of the output carriage 5, the unwinding varying according to the position of the carriage 5 and the opposite direction or no advance of the carriage 5 relative to the the direction of advance of the web on the carpet 2. In FIG. mobile entry carriage 3 according to the state of the art, in which the carpet full 2 is guided by two guide rollers 7 and 8 carried by the carriage mobile 3 defining an inclined section 9 so that the sail 1 transported by this carpet then performs around the second roll 8 a turn that is less than 180 °. In the entry trolley 3, the path of the second full carpet 4 is defined by four rolls of 10, 11, 12 and 13 carried by the input carriage 3 and arranged on the one hand that a pinch line 14 is formed between the guide roller 8 of the first belt 2 around which the sail 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 belt 4 is brought close to the roll 8 to resume the veil 1 at its output.

Sur la figure 2, est représenté un chariot mobile d'entrée d'étaleur-nappeur selon l'invention 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. Selon l'invention, un rouleau aspirant 31, fixé au châssis du chariot 3, est 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.FIG. 2 shows a mobile spreader-entry input carriage. according to the invention that can replace the carriage 3 described above (the The same references are used below for the elements common to two figures). The first solid carpet 2 reverses around three guide rollers driven in the same direction: a roller upper 20, an intermediate roll 21 and a lower roll 22. The intermediate roller 21 is placed so as to define in section a turn in point for the carpet 2 with an inclined portion 23 before the roller 21 and an inclined portion 24 after the roller 21. The second solid carpet 4 is guided for its part in the mobile carriage 3 by three guide rollers: the carpet is guided in "S" around an upper roller 41, then around a intermediate roller 42 driven in reverse and then a lower roller 43 bringing the carpet 4 to the appropriate level with respect to the solid carpet 2 for realize the pinching zone P defined between the two mobile carriages entry and exit. All guide rollers are attached to the chassis of the trolley and driven automatically in rotation with the displacement of matching carpet. According to the invention, a suction roller 31, attached to the chassis of the carriage 3, is 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 on the periphery of the suction roller is substantially tangential and minimizing the vacuum distance d between the intermediate roller 21 and the transfer roller 31 and also for the transfer of the veil of the roller 31 is done then closer in the plane of the second full carpet 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 carpet 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 meaning after the reversal of the veil and especially advantageously to the same speed. We can also note here that thanks to this configuration in "S" vis-à-vis the flipping of the veil, the solid carpet 4 can dam the phenomena of compression or depression due to the displacement of trolley; this can be recommended in extreme cases of speed.

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. 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 connected laterally to a controlled suction source to maintain the veil during its reversal. The means used to feed the suction roll 31 with a movable suction may comprise a onboard blower, or a system of flexible or telescopic hoses connected to a fixed fan, or a connection nozzle connected to a suction manifold. Deflection means schematized by the deflector arcuate 46 allow to define an effective suction zone in the curvature made by the veil. The characteristics of the roll according to the invention are described in detail later with reference to Figures 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 la zone de vide entre le rouleau aspirant 31 et le tapis 2 dans laquelle le voile n'est pas contrôlé. FIG. 3 shows a variant embodiment according to which, the veil 1 is transferred not directly to the suction roll 31 but on a 50 endless perforated belt mounted around the suction roller 31 and two guide rollers 51 and 52 arranged opposite the carpet portion full inclined 23 close respectively guide rollers 21 and 22. This construction makes it possible to limit the area of vacuum between the roll aspirant 31 and the carpet 2 in which the web 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 variant of embodiment still in which uses an "S" configuration for the solid carpet 2 with the provision of an additional guide roller 53 in a plane rear of the two guide rollers 21 and 22, which allows these two guide rollers 21 and 22 to be approached closer to the roller aspirant 31 and thus reduce the empty spaces between the carpet 2 and the 31. In this FIG. 4, there is also shown alternatively a substantially straight arrival of the carpet 4 guided in the mobile carriage 3 by the least one guide roller 54. A variant is also shown. right arrival of the carpet 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 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.FIG. 5 shows another variant of a trolley embodiment input-splitter input 3 implementing a second roll aspirant 60 according to the invention placed above the veil 1, before its turning, between the belt 2 and the roller 31 to further control the sail in the vacuum zone between them. In the illustrated carriage, the carpet 2 is guided around a first guide roller 61 and a second guide roller 62, between which is defined a portion of carpet inclined 63 so that the belt 2 then turns on the roller 62 turning over less than 180 °. This inclined portion allows also a transfer over a larger angular range of suction of the upper suction roll 60. The transfer of the suction roll 60 on the turning roller 31 is performed through the relative positioning of active areas of aspiration. The carpet 4 is guided next to the rollers aspirants 60 and 31 around two upper guide rollers 64 and lower 65 so as to describe an "S" path. Advantageously, this configuration allows to couple the guide roller 64 and the roller aspirant 60 and the guide roller 65 and the suction roller 31 for the to train together.

Les figures 6 à 13 décrivent des exemples de réalisation de rouleau aspirant pouvant s'appliquer à l'invention. Figures 6 to 13 describe embodiments of roll aspirant that can be applied to the invention.

Selon l'exemple de réalisation représenté sur les figures 6 à 9, un rouleau aspirant 100 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 parois opposées de côté 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 en 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 parois de côté 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 FIGS. 6 to 9, a suction roll 100 is hollow having a cylindrical wall provided on its outer surface of grooves 102 here axial extending over the length of the roller and two opposite side walls 100A, 100B. Each flute 102 can be defined by a crest 103 framed by two funds 104, each bottom 104 being made permeable to air through orifices suction device 105 of suitable shape and density according to the applications targeted according to the density of the veil or equivalent product in contact with the suction roll. To achieve suction, a perforated axial tube 106 is arranged inside the roll 100 protruding on both sides of its side walls 100A, 100B, the ends of the tube 106 being connected with known manner to an external source of suction. The roll 100 is adapted to be rotated relative to the tube 106 along an axis A of rotation thanks to appropriate ball bearings R The suction zone effective (107 in Figure 6), at the entrance 109 of which a veil of fibers 108 is supported by the roll 100 and at the exit 110 of which the sail is released, is delimited here by two radial deflectors 111A and 111B which are connected to the axial tube 106. These deflectors can be advantageously provided with means for adjusting their spacing (illustrated by arrows F) so as to be able to adjust the angular extent of the zone 107. In addition, 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 force 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. Une aspiration accrue avec la vitesse de défilement peut permettre de compenser la force centrifuge. Ceci peut être par ailleurs réalisé automatiquement grâce à un contrôle de la machine. 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 can be seen better in FIG. 7, according to the invention, the blanks 110A, 110B facing one another neighbor grooves 102, deviate from the common bottom 104 towards the outside of the roll, so that when the inside of the roll is depressed, a chamber of depression C is formed between the bottom 104 of the grooves and the two ridges adjacent ones providing a suction surface between two ridges 103 widened by relative to the outlet section of the orifice 105 and offset relative thereto. The suction force is adjusted, in particular according to the speed of scrolling the veil 108, so that it is maintained and guided on the ridges 103 thanks to the vacuum chamber C. A increased suction with the scrolling speed can allow to to compensate the centrifugal force. This can also be done automatically thanks to a control of the machine. The air present in the sail 108 is sucked radially where appropriate inside the roll by the orifices 105 (shown schematically by the arrows F2). Thanks to the presence of the vacuum chamber C, the fibers of the veil are thus not in contact holes 105 and unlikely to come to block them. A triangular shape in section splines as in Figures 7 and 8 allows advantageously to further increase the suction area of the chambers of depression C and thus to suck the veil on practically all its surface while maintaining good mechanical strength for the roll. For further increase the sliding of the guided web on the suction roll according to the invention, the ridges 103 of the grooves are advantageously rounded as shown also in FIGS. 7 and 8. Furthermore, the bottom 104 of the grooves is widened relative to the ridges 103 of the grooves for to be able to increase the size of the orifices 105 and thus the suction force.

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 allongées depuis les côtés du rouleau jusqu'au centre de celui-ci.In FIG. 9, the torn portion shows the means to homogenize the suction carried out laterally, constituted by perforations of the tube 106 progressively elongated from the sides of the roll to the center of it.

Par ailleurs, 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.Moreover, it can be expected that on the circumference of the roll in the suction zone, there is an area where the suction is stronger by example corresponding to where the centrifugal force is the most important. This stronger suction zone can be obtained with perforations in this area of size and / or greater density, preferably, relative 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 embodiments are possible, particular with regard to the arrangement of the orifices 105 which are provided aligned from one flute bottom 104 to another in Figure 8, but which could be also staggered from a flute bottom to a other. The shape of the orifices 105 may also vary, either homogeneous over the length of the roll, either inhomogeneous to create an effect desired suction, such as homogenization or concentration. Moreover, the cross section of the flutes can be trapezoidal, with the small side of the trapezoid corresponding to the ridge of groove, so as to enlarge the support surfaces of the sail when 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 application of the suction roller to the reversal of a veil in a crosslayer, the following values may be given as a purely indicative: a roll diameter of the order of one or more hundreds of mm and a depth and a flute 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. 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 embodiment of FIG. realization of the perforated cylindrical wall. Instead of fluting, 200 circular and two-stage perforations are formed in the wall cylindrical, comprising a lower stage constituted by an orifice suction 205 opening into an upper floor of more dimensions large than the orifice 205 forming the vacuum chamber C. 203 for a veil are thus formed on the surface of the wall between the perforations 200, said support zones being more or less large according to the spacing of the perforations. The shape of the room depression C can be conical or substantially parallelepipedic like shown in Figure 11, with a suction port in its bottom.

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.FIGS. 12 and 13 show two variants of embodiment 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 a setting of the support angle of the veil by the suction roller and thus to cover several mounting configurations with the same roller design. For example, a same adjustable suction roller can be used to transfer a veil between a card and a lapper from any angle formed between the incoming carpet and the carpet coming out. In Figure 13, this is a tube 116 inserted inside the suction roll 100 and having a an air permeable arcuate zone 116A and an arcuate zone of deflection 116B having a greater radius of curvature than that of the permeable wall zone 116A for plugging the suction ports 105 of the roll, the two zones 116A and 116B being connected by radial walls 117 and 118. A homogenous vacuum pre-chamber 119 is thus created. between the deflector 116A and the roll 100. The deflector 116A then ensures a diffuser function so as to homogenize the depression in this pre-chamber over the entire length of the suction roll.

La figure 14 illustre un autre mode de réalisation possible du chariot mobile selon l'invention dans lequel les moyens de maintien perméables à l'air sont adaptés à chasser l'air présent dans le voile radialement vers l'extérieur du virage. Dans ce cas, c'est le tapis 2 qui fait faire un retournement au voile à l'aide d'au moins un rouleau de guidage (tel que 60) fixé au châssis du chariot mobile. Les moyens perméables à l'air sont définis par un tapis perforé sans fin 61 qui est amené, grâce à des rouleaux de guidage positionnés de manière adéquate dans le châssis du chariot, à proximité du tapis 2, dans le virage que doit effectuer le voile autour du rouleau 60, et de manière que le voile soit guidé entre le rouleau 60 et ce tapis perforé 61 dans le virage à 180° défini par ledit rouleau. Dans cet exemple, les rouleaux de guidage sont au nombre de quatre dont deux rouleaux de guidage 62 et 63 entre lesquels le tapis perforé 61 est amené à proximité du tapis plein 2 avec une courbure épousant au maximum le virage que doit effectuer le voile. C'est dans cette portion située entre les deux rouleaux 62 et 63 que le voile peut être plaqué et l'air chassé radialement à l'intérieur du tapis perforé 61. FIG. 14 illustrates another possible embodiment of the trolley mobile device according to the invention in which the holding means permeable to the air are adapted to chase the air present in the web radially towards the outside of the turn. In this case, it is the carpet 2 which makes a reversal to the veil using at least one guide roller (such as 60) attached to the frame of the mobile carriage. The means permeable to air are defined by an endless perforated belt 61 which is fed through rolls of placed in the chassis of the trolley near the carpet 2, in the bend that the sail must make around the roll 60, and so that the web is guided between the roller 60 and this perforated belt 61 in the 180 ° turn defined by said roller. In this example, the guide rollers are four in number, two of which guide rollers 62 and 63 between which the perforated belt 61 is brought to close to the solid carpet 2 with a curvature matching the maximum turn that the veil must perform. It is in this portion located between two rollers 62 and 63 that the veil can be plated and the air chased radially inside the perforated belt 61.

Sur la figure 15, est représenté un mode de réalisation mettant en oeuvre un rouleau perméable à l'air 70. Le tapis plein d'arrivée 2 est ici guidé sur des rouleaux de guidage 21, 53 et 22 comme dans le mode de réalisation de la figure 4. Le rouleau 70 est également placé dans le chariot comme le rouleau 31 de la figure 4, de sorte que le voile 1 soit transféré sur lui pour y effectuer son retournement. La différence ici se situe dans le fait que le rouleau 70 est simplement perméable à l'air et non aspirant et c'est le tapis plein 4 récepteur qui est guidé autour de deux rouleaux de guidage 71 et 72 de manière à former une paroi de plaquage pour le voile derrière le rouleau perméable 70. L'air peut ainsi s'échapper radialement vers l'intérieur du rouleau 70. Pour le rouleau 70, on peut choisir un rouleau cannelé tel que décrit plus haut possédant de préférence des cannelures circonférentielles pour éviter de créer des canaux de circulation axiale d'air.In FIG. 15, an embodiment is shown works a breathable roll 70. The complete carpet of arrival 2 is here guided on guide rollers 21, 53 and 22 as in the embodiment of Figure 4. The roller 70 is also placed in the carriage as the roller 31 of Figure 4, so that the web 1 is transferred to him to perform his turnaround. The difference here lies in the fact that the roller 70 is simply breathable and non-aspirating and it is the full 4 receiver mat that is guided around two guide rollers 71 and 72 so as to form a plating wall for the veil behind the permeable roll 70. The air can thus escape radially inwards of the roller 70. For the roller 70, it is possible to choose a fluted roller such as described above preferably having flutes circumferential to avoid creating channels of axial air flow.

Claims (20)

Chariot d'entrée d'étaleur-nappeur (3) mobile en va-et-vient, dans lequel un voile de fibres textiles effectue un retournement en étant transféré d'un tapis plein d'arrivée mobile (2) sur un tapis récepteur mobile (4), comportant des premiers moyens de guidage (20 ; 21 ; 22) permettant au tapis plein (2) d'effectuer un demi-tour et des second moyens de guidage (41 ; 42 ; 43 ; 54) permettant au tapis récepteur (4) d'être amené selon la même direction que le tapis plein d'arrivée après son demi-tour, caractérisé par des moyens de maintien (100 ; 31 ; 61 ; 70 ; 84 ; 93) perméables à l'air disposés dans une courbure réalisant le retournement dudit voile et adaptés à évacuer radialement l'air présent dans le voile.A reciprocating crosslapper entry trolley (3), in which a web of textile fibers reverses by being transferred from a solid conveyor belt (2) to a moving conveyor belt (4), having first guide means (20; 21; 22) allowing the solid belt (2) to perform a half-turn and second guide means (41; 42; 43; 54) allowing the receiving belt (4) to be conveyed in the same direction as the full conveyor belt after its U-turn, characterized by air permeable holding means (100; 31; 61; 70; 84; a curvature effecting the reversal of said web and adapted to radially evacuate the air present in the web. Chariot selon la revendication 1, caractérisé en ce que les moyens perméables à l'air comprennent un rouleau (31, 70) dont la surface est perméable à l'air sur lequel le voile est transféré pour qu'il effectue son retournement avant d'être déposé sur le tapis récepteur (4).Trolley according to claim 1, characterized in that the air-permeable means comprise a roller (31, 70) whose surface is permeable to air on which the web is transferred so that it reverses before it to be deposited on the conveyor belt (4). Chariot selon la revendication 2, caractérisé en ce que grâce à une disposition appropriée des moyens de guidage (21, 53, 22), on forme avec le tapis récepteur (4) une paroi de placage en arrière de la courbure effectuée par le voile autour du rouleau perméable (70), de sorte que le voile (1) peut être plaqué contre le tapis récepteur (4) lors de son retournement avec la possibilité pour l'air contenu dans le voile de s'échapper radialement vers l'intérieur du rouleau (70) grâce la perméabilité de sa paroi.Trolley according to Claim 2, characterized in that, thanks to a suitable arrangement of the guiding means (21, 53, 22), a receiving wall (4) is formed with a veneer wall behind the curvature carried by the veil around it permeable roll (70), so that the web (1) can be pressed against the conveyor belt (4) during its overturning with the possibility for the air contained in the web to escape radially towards the inside of the roller (70) thanks to the permeability of its wall. Chariot selon la revendication 2, caractérisé en ce que le rouleau est creux (100 ; 31 ; 84 ; 93) relié à une source d'aspiration, et adapté à reprendre le voile (1) de fibres du tapis plein d'arrivée (2), à le maintenir par aspiration dans la courbure puis à le relâcher sur le tapis récepteur (4).Trolley according to Claim 2, characterized in that the roller is hollow (100; 31; 84; 93) connected to a suction source and adapted to take up the web (1) of fibers from the solid carpet of arrival (2). ), to hold it by suction in the curve and then to release it on the conveyor belt (4). Chariot selon la revendication 4, caractérisé en ce que les moyens pour évacuer l'air comprennent en outre un tapis perforé (50) sans fin guidé sur le rouleau aspirant (31) et sur un rouleau de guidage de manière à minimiser la zone de non contrôle du voile entre le tapis d'arrivée et le rouleau aspirant et la zone de non contrôle du voile entre le rouleau aspirant et le tapis récepteur.Trolley according to Claim 4, characterized in that the means for evacuating the air further comprise an endless perforated belt (50) guided on the suction roller (31) and on a guiding roller so as to minimize the area of no control of the web between the conveyor belt and the suction roll and the non-control area of the web between the suction roll and the conveyor belt. Chariot selon la revendication 4 ou 5, caractérisé en ce que le rouleau aspirant comprend des moyens de déflection (111A ; 11B ; 116B ; 115 ; 46) disposés à l'intérieur dudit rouleau définissant une zone d'aspiration (107) limitée correspondant sensiblement à la zone de courbure du voile.Trolley according to claim 4 or 5, characterized in that the suction roll comprises deflection means (111A; 11B; 116B; 115; 46) disposed inside said roll defining a suction zone (107) corresponding substantially corresponding to the curvature area of the veil. Chariot selon l'une des revendications 4 à 6, caractérisé par des moyens de réglage de l'étendue angulaire de la zone d'aspiration.Trolley according to one of claims 4 to 6, characterized by means for adjusting the angular extent of the suction zone. Chariot selon l'une des revendications 4 à 7, caractérisé en ce que la paroi cylindrique du rouleau aspirant est lisse munie de perforations formant les orifices d'aspiration.Trolley according to one of claims 4 to 7, characterized in that the cylindrical wall of the suction roll is smooth provided with perforations forming the suction openings. Chariot selon l'une des revendications 4 à 7, caractérisé en ce que la paroi cylindrique du rouleau (100) est munie d'orifices d'aspiration (105,205) qui débouchent dans au moins une chambre de dépression (C) formée dans la paroi cylindrique entre des zones d'appui (103,203) pour le voile.Trolley according to one of Claims 4 to 7, characterized in that the cylindrical wall of the roll (100) is provided with suction openings (105, 205) which open into at least one vacuum chamber (C) formed in the wall cylindrical between bearing areas (103,203) for the sail. Chariot selon la revendication 9, caractérisé en ce que les orifices d'aspiration (105) sont disposés dans le fond de cannelures (102), la chambre de dépression 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.Trolley according to Claim 9, characterized in that the suction openings (105) are arranged in the bottom of grooves (102), the vacuum chamber being created between the bottom (104) of each groove (102) and its two adjacent crests (103), the ridges forming the support zones for the veil. Chariot selon l'une des revendications 4 à 10, caractérisé par des moyens pour créer une aspiration progressivement plus importante dans une zone angulaire de la zone d'aspiration.Trolley according to one of claims 4 to 10, characterized by means for creating a progressively greater suction in an angular zone of the suction zone. Chariot selon la revendication 11, caractérisé en ce que la zone angulaire correspond à l'endroit de la courbure où la force centrifuge est la plus grande.Trolley according to Claim 11, characterized in that the angular zone corresponds to the point of the curvature in which the centrifugal force is greatest. Chariot selon l'une des revendications 4 à 12, caractérisé par des moyens pour créer une aspiration homogène sur la longueur du rouleau. Trolley according to one of claims 4 to 12, characterized by means for creating a homogeneous suction along the length of the roller. Chariot selon l'une des revendications 4 à 13, caractérisé en ce que les moyens de guidage (41 ; 42 ; 43) du tapis récepteur sont positionnés de sorte que ledit tapis forme un barrage en regard dudit rouleau aspirant aux phénomènes de compression et de dépression dus au déplacement dudit chariot en va-et-vient.Trolley according to one of claims 4 to 13, characterized in that the guide means (41; 42; 43) of the receiving belt are positioned so that said belt forms a dam facing said roller sucking the phenomena of compression and depression due to displacement of said carriage back and forth. Chariot selon l'une des revendications 4 à 14, caractérisé en ce que ledit rouleau aspirant est entraíné en rotation grâce à un couplage avec un rouleau de guidage (42) appartenant aux moyens de guidage (41 ; 42 ; 43) du tapis récepteur.Trolley according to one of claims 4 to 14, characterized in that said suction roller is rotated by coupling with a guide roller (42) belonging to the guide means (41; 42; 43) of the receiving belt. Chariot selon l'une quelconque des revendications 4 à 15, caractérisé par un second rouleau aspirant (60) disposé au-dessus du voile (1) présentant une zone d'aspiration correspondant à l'espace vide situé entre le tapis d'arrivée (2) et le premier rouleau aspirant (31).Trolley according to any one of claims 4 to 15, characterized by a second suction roller (60) disposed above the web (1) having a suction zone corresponding to the empty space between the conveyor belt ( 2) and the first suction roll (31). Chariot selon la revendication 1, caractérisé en ce que le retournement du voile étant effectué sur le tapis plein d'arrivée (2), les moyens perméables à l'air sont constitués d'une paroi (61) de placage perforée convexe disposée sur l'extérieur de la courbure correspondant audit retournement de sorte que le voile puisse venir en contact de ladite paroi convexe sous l'effet de la force centrifuge s'exerçant le cas échéant dans ladite courbure.Trolley according to claim 1, characterized in that the reversal of the web being carried out on the solid conveyor belt (2), the air-permeable means consist of a wall (61) of convex perforated veneer disposed on the outside of the curvature corresponding to said reversal so that the web can come into contact with said convex wall under the effect of the centrifugal force exerted where appropriate in said curvature. Chariot selon la revendication 17, caractérisé en ce que la paroi perforée convexe est constituée d'une zone d'un tapis perforé sans fin (61) déplacé en continu qui est guidée pour épouser l'extérieur de la courbure.Trolley according to Claim 17, characterized in that the convex perforated wall consists of an area of an endless perforated belt (61) which is moved continuously and which is guided to fit the outside of the curvature. Chariot selon l'une des revendications précédentes, caractérisé en ce que le tapis récepteur (4) étant un tapis plein, les moyens de guidage (20 ; 21 ; 22 ; 41 ; 42 ; 43 ; 54) permettent de définir après le retournement du voile une zone où le voile est pincé entre les deux tapis (2 ; 4).Trolley according to one of the preceding claims, characterized in that the receiving belt (4) is a solid carpet, the guide means (20; 21; 22; 41; 42; 43; 54) define after the reversal of the sail an area where the web is pinched between the two mats (2; 4). Etaleur-nappeur dans lequel un voile (1) arrive en continu sur un tapis plein sans fin d'arrivée (2), puis entre 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) dans un sens opposé au sens d'arrivée du tapis plein (2), en sortie du chariot (3), le voile (1) étant maintenu par pincement entre les deux tapis pleins (2,4) et ensuite repris par un second chariot mobile 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, caractérisé en ce que le chariot mobile d'entrée (3) est un chariot selon l'une quelconque des revendications précédentes.Spreader-spreader in which a web (1) arrives continuously on an endless endless conveyor belt (2), then enters a movable reciprocating input carriage (3) where it performs a half turn to be taken again by a mat endless receiver (4) continuously fed into said carriage (3) in a direction opposite to the direction of arrival of the solid carpet (2), at the exit of the carriage (3), the veil (1) being held by clamping between the two solid mats (2,4) and then taken up by a second movable output carriage (5), whose function is to spread the sail back and forth on an apron (6). ) moving continuously perpendicular to the displacement of the output carriage (5) so as to form a ply consisting of staggered folds, characterized in that the movable input carriage (3) is a carriage according to any one of the preceding claims .
EP03291166A 2002-05-28 2003-05-20 Movable carriage at the entrance to a cross lapper and cross lapper equipped with such a carriage Expired - Lifetime EP1367166B1 (en)

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FR0206469A FR2840326B1 (en) 2002-05-28 2002-05-28 MOBILE TROLLEY OF SPIDER-STEAMER AND SPREADER-STEAMER EQUIPPED WITH SAID TROLLEY
FR0206469 2002-05-28

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CN108532127A (en) * 2018-05-15 2018-09-14 常熟市振泰无纺机械有限公司 A kind of lapping machine aluminum pole fixing device
US11129882B2 (en) 2015-10-30 2021-09-28 University Of Copenhagen Virus like particle with efficient epitope display
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WO2006069651A1 (en) * 2004-12-23 2006-07-06 Autefa Automation Gmbh Non-woven web-laying device and method for guiding a nap
EP1717357A1 (en) * 2005-04-27 2006-11-02 Oskar Dilo Maschinenfabrik KG Cross-lapper
CN100593595C (en) * 2007-02-15 2010-03-10 奥斯卡迪罗机械制造公司 Cross lapper
US7480965B2 (en) 2007-02-15 2009-01-27 Oskar Dilo Maschinenfabrik Kg Cross lapper
EP1959038A1 (en) * 2007-02-15 2008-08-20 Oskar Dilo Maschinenfabrik KG Device for laying a fleece
EP2365113A1 (en) 2010-03-08 2011-09-14 Asselin-Thibeau Inlet carriage of a cross layer with grooved web reversal roller
FR2957092A1 (en) * 2010-03-08 2011-09-09 Asselin Thibeau MOVING CARRIER OF INPUT OF FLOORING BEAM COMPRISING A ROLL OF DETOUR WITH CANNELURES OR ANNELURES
CN102190180A (en) * 2010-03-08 2011-09-21 阿瑟兰-蒂博公司 Movable input trolley of net laying and forming machine having steering roller with ribs or ring bars
CN102190180B (en) * 2010-03-08 2015-04-29 安德里茨阿斯兰-蒂博 Movable input trolley of net laying and forming machine having steering roller with ribs or ring bars
EP2365113B2 (en) † 2010-03-08 2016-05-18 Andritz Asselin-Thibeau Inlet carriage of a cross layer with grooved web reversal roller
DE102010050029A1 (en) 2010-11-02 2012-05-03 Trützschler Nonwovens Gmbh stacker
WO2012059272A1 (en) 2010-11-02 2012-05-10 Trützschler Nonwovens Gmbh Cross-lapper
CN103189554A (en) * 2010-11-02 2013-07-03 特吕茨勒非织造布有限公司 Cross-lapper
CN103189554B (en) * 2010-11-02 2015-08-19 特吕茨勒非织造布有限公司 Cross lapping machine
EP3447175A1 (en) * 2012-07-13 2019-02-27 Hi Tech Textile Holding GmbH Nonwoven fabric layer and nonwoven fabric laying method
CN104583477B (en) * 2012-07-13 2017-03-15 恒天(奥地利)控股有限公司 Staggered form lapping machine
CN104583477A (en) * 2012-07-13 2015-04-29 恒天(奥地利)控股有限公司 Cross-lapper
EP2716801A2 (en) 2012-10-02 2014-04-09 Trützschler GmbH & Co. KG Stacker and method for operating a stacker
DE102012019363A1 (en) 2012-10-02 2014-04-03 Trützschler GmbH & Co Kommanditgesellschaft Cross-stacker and method for operating a cross-stacker
US11129882B2 (en) 2015-10-30 2021-09-28 University Of Copenhagen Virus like particle with efficient epitope display
US20170129710A1 (en) * 2015-11-10 2017-05-11 Oskar Dilo Maschinenfabrik Kg Device for a Guided Transport of a Card Web
US9751696B2 (en) * 2015-11-10 2017-09-05 Oskar Dilo Maschinenfabrik Kg Device for a guided transport of a card web
EP3239371A1 (en) * 2016-04-29 2017-11-01 Oskar Dilo Maschinenfabrik KG Fibrous web laying device
CN108532127A (en) * 2018-05-15 2018-09-14 常熟市振泰无纺机械有限公司 A kind of lapping machine aluminum pole fixing device
CN108532127B (en) * 2018-05-15 2023-09-29 常熟市振泰无纺机械有限公司 Aluminum stay bar fixing device of lapping machine
IT202000027170A1 (en) 2020-11-12 2022-05-12 Motion Eng S R L LIPPER FOR CARD PLY AND RELATED LAPPING METHOD
EP4001478A1 (en) 2020-11-12 2022-05-25 Motion Engineering S.r.l. Crosslapper for card webs and related method for crosslapping

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ES2379808T3 (en) 2012-05-03
FR2840326A1 (en) 2003-12-05
ATE538232T1 (en) 2012-01-15
EP1367166B1 (en) 2011-12-21

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