EP2365113B2 - Inlet carriage of a cross layer with grooved web reversal roller - Google Patents
Inlet carriage of a cross layer with grooved web reversal roller Download PDFInfo
- Publication number
- EP2365113B2 EP2365113B2 EP11305142.9A EP11305142A EP2365113B2 EP 2365113 B2 EP2365113 B2 EP 2365113B2 EP 11305142 A EP11305142 A EP 11305142A EP 2365113 B2 EP2365113 B2 EP 2365113B2
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- EP
- European Patent Office
- Prior art keywords
- web
- reversal roller
- reversal
- roller
- carriage
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Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G25/00—Lap-forming devices not integral with machines specified above
Definitions
- the present invention relates to the manufacture of nonwovens in the textile field, and relates to an improvement made to a mobile spreader-entry input carriage and a crosslapper equipped with said improved carriage.
- the spreader-spreader comprises a movable reciprocating input carriage in which a fiber textile web is guided on a first carpet, said front carpet, making a U-turn to start in the opposite direction, and a second carpet , said rear carpet, comes to take the veil after turning and pinch against the carpet before. The veil is thus returned in this input carriage during its transfer to the rear carpet.
- the length of the nip between the front mat and the rear mat can be changed by moving the input carriage back and forth. This makes it possible to absorb the gap between the continuous arrival of the web on the front carpet and the unwinding of the web from a moving output carriage back and forth over a perpendicular receiving deck moving in continuous and on which is formed the web constituted by the folded web.
- a widely known disadvantage of this configuration stems from the fact that, when the veil reverses, it undergoes a centrifugal force with the consequence that it has a tendency to separate from the carpet, which subsequently affects the homogeneity of the formed ply. .
- the web is also subject to its own inertia due to its transport speed relative to the carriage. In a crosslapper, the reversal of the web in the entrance carriage is therefore one of the critical moments when the web may peel off and become deformed.
- Another solution is to stretch the web at the entry of the crosslapper by creating a speed difference between the crosslapper and the previous machine.
- This results in a stretching of the veil and therefore a loss of quality requiring a greater number of plies in the sheet.
- these holding means can be made in the form of a perforated roll.
- this perforated roll may comprise on its periphery longitudinal grooves or circumferential corrugations which, according to the teaching of this European patent EP 1 367 166 , have the function of forming depression chambers right of the holes of the perforated roll.
- the depth of these grooves or corrugations is very low, and does not exceed 3mm.
- suction means in combination with a perforated cylinder significantly increases the cost of manufacture and operation of the input carriage of the crosslapper.
- the textile web is a multilayer condensed web, it is in practice difficult to properly maintain the upper layer of the web on the surface of the suction perforated cylinder.
- the object of the present invention is to propose another solution for improving the stability of the transport of a textile fiber fleece at the moment when it reverses in the input carriage of a crosslapper before being supported. in reverse by the rear moving belt, said solution of the invention does not require the implementation of suction means.
- the invention thus relates to a moving spreader-lapper input carriage reciprocating, comprising a movable front mat, a movable rear mat associated with the front mat and turning means for returning a fiber textile veil when transferring the carpet to the rear carpet.
- the turning means comprise a non-suction and air-impervious detour roll, and an impervious wall of veneer which makes it possible to compress said textile fiber fleece against the detour roll in the curved portion of the detour roll or the fiber textile veil performs its U-turn.
- Said detour roller is provided on its periphery with longitudinal grooves which define on the surface of the detour roller longitudinal channels, or circumferential annular grooves which define on the surface of the detent roller circumferential channels, said longitudinal or circumferential channels being adapted to contain and channel all the air that is expelled from the web during its compression between the detour roller and the veneer wall.
- the subject of the invention is also a process for turning a fiber textile veil which is characterized in that the textile fiber veil is made to turn during its transfer between a moving front mat and a rear mat.
- movable associated with the front carpet using an air-tight non-suction detour roll, and provided on its periphery with longitudinal grooves, which define on the surface of the detour roller longitudinal channels, or circumferential corrugations, which delimit on the surface of the circumferential channel detent roll, and compressing said textile fiber web against the detour roll by means of an airtight veneer wall, in the curved portion of the detour roll where the textile veil of fibers performs its half-turn, so that all the air that is expelled from the web during its compression between the detour roll and the veneer wall is contained and channeled in the longitudinal or circumferential channels of the detour roll.
- the invention also relates to a lapper-spreader in which a fiber textile web arrives continuously on a front endless belt and then enters a movable input carriage back and forth where it performs a half turn to then be taken up by an endless conveyor conveyed continuously in said carriage in a direction opposite to the direction of arrival of the front carpet, at the output of the carriage.
- the web is held by pinching between the two front and rear mats and then taken up by a second mobile exit carriage, whose function is to spread the sail back and forth on an apron moving continuously perpendicular to the movement of the carriage of output so as to form a web consisting of offset folds.
- Said movable input carriage is a previously referred carriage.
- the figure 1 shows schematically and in part an example of spreader-launcher of the state of the art in which there is a transfer of web between two solid mats.
- the veil 1 arrives continuously on a first endless belt 2, said front carpet, then, in a moving entrance trolley in a back and forth 3 where it performs a half-turn to be taken again by a second carpet without end 4, said rear carpet, brought continuously into said carriage 3 in a direction opposite to the direction of arrival of the front carpet 2.
- the web 1 is pinched between the two mats 2 and 4.
- the function of the input carriage 3 is to make the continuous arrival of the web on the first belt 2 with the winding of the web at the output of the output carriage 5 compatible, by varying the length of the nipping zone, the reeling varying according to the position of the output carriage 5 and the opposite direction or no advance of the carriage 5 relative to the advancing direction of the web on the carpet 2.
- FIG. 1 there is shown a moving carriage 3 input according to the state of the art, wherein the front belt 2 is guided by two guide rollers 7 and 8 carried by the movable carriage 3 defining an inclined section 9 so that the sail 1 transported by this carpet then performs around the second roller 8 a turn that is less than 180 °.
- the path of the rear conveyor 4 is defined by four guide rollers 10, 11, 12 and 13 carried by the input carriage 3 and arranged in such a way that pinch line 14 is formed between the guide roller 8 of the front belt 2 around which the web 1 makes its turn and one of the guide rollers (roller 11 on the figure 1 ) of rear carpet 4 and, on the other hand, that the rear carpet 4 is brought near the roller 8 to resume the web 1 at its output.
- FIG. 2 there is shown a moving spreader-lapper input carriage according to the invention for replacing the carriage 3 described above (the same references are used hereinafter for the elements common to the two figures).
- the solid rear carpet 4 is guided upstream of the diverting roller 18 by two guide rollers 19 and 20, and downstream of the diverting roller 18 by a guide roller 21.
- This detour roller 18 is a non-aspirating hollow cylinder 180 provided over its entire periphery with longitudinal grooves 181 equidistant.
- the longitudinal grooves 181 delimit between them and with the outer surface 180a of the cylinder 180 of the longitudinal channels 183.
- detour roll 18 of the invention is a hollow cylinder 180 'non-suction, provided over its entire periphery with circumferential annular grooves 181' equidistant.
- the longitudinal grooves 181 or circumferential grooves 181 ' can be obtained by machining a starting roll of sufficient thickness.
- the longitudinal grooves 181 may also be obtained by spinning the tube 180 (for example aluminum profile).
- the longitudinal grooves 181 or circumferential grooves 181 ' may also be grooves or corrugations of an attached sleeve which is threaded and fixed around a cylinder.
- the length L of the detour roll 18 is at least equal, and preferably greater than the sail width 1.
- the wall of the cylinder 180 or 180 ' is not perforated and is impervious to air.
- the guide rolls 20 and 21 of the solid carpet 4 are positioned relative to the diverting roller 18 so that a portion 40 of the solid rear carpet 4 embraces a portion of the periphery of the diverting roll 18 while being absence of web 1, in contact with the top 181 has splines 181 or rings 181 'of the detour roller 18.
- the web 1 is transported to the surface of the front belt 2 to the guide roller 16, at which the web 1 leaves the front belt 2 and is taken up at the periphery of the diverting roller 18, between the roller turn 18 and the portion 40 of the full back carpet 4
- the web 1 is returned by being trapped and compressed between the grooves 181 or annulars 181 'of the diverting roller 18 and the portion 40 of the belt 4 which forms an impervious wall of the air.
- the top 181a of each groove 181 or annulus 181 ' has a rounded profile.
- the compressed web 1 is conveyed at the exit of the diverting roller 18 by the belt 4, being pinched between the rear belt 4 and the front belt 2.
- the volume of these channels 183 or 183 ' is sufficient to contain all the air that is expelled from the veil 1 during its compression between the belt 4 and the grooves 181 or rings 181', so that this air is channeled into its channels 183 or 183 'during the rotation of the detour roller 18.
- the air contained in each portion of the web 1 compressed between the solid carpet 4 and two adjacent annular grooves 181' of the detour roller 18 (cf. figure 6 ) or two adjacent grooves 181 of the diverting roller 18 is expelled into the channel 183 'or 183 delimited between the two corrugations 181' or grooves 181.
- each longitudinal channel 183 or circumferential 183 ' is large enough to contain all of this air expelled from the veil 1 to the right of said channel 183 or 183 '.
- this air contained and channeled in each longitudinal channel 183 or circumferential 183 ' is driven by the detour cylinder 18, without risk of alteration of the structure of the web, until freely escape when said channel 183 or 183 'is released from the belt 4.
- the web 1 is perfectly maintained over its entire width (including at its longitudinal edges), and the inertia and centrifugal forces related to the dynamics of the mobile carriage 3 are without influence on the structure of the veil. It follows that we can advantageously increase if necessary the operating speed of the spreader lapper-lapper without altering the structure of the web.
- the compression holding of the web 1 advantageously allows the use of the spreader-lapper with sails that can be multilayer, without risk of delamination or sliding of the layers of the web.
- each longitudinal channel 183 ( figure 4 - hatched area between two adjacent grooves) was about 70 mm 2 .
- the spreader-lapper could be used to manipulate a monolayer or multilayer web 1 whose thickness (before compression) could be up to 40 mm, with a web displacement speed of up to 350 m / min.
- the invention is not limited to the implementation of a corrugated detour roll 18 having the aforementioned dimensional characteristics. More generally, for an implementation of the invention with webs 1 whose thickness (before compression) is between 10 mm and 40 mm, the detour roll 18 of Figures 3 and 4 preferably, but not necessarily, at least one of the following dimensions.
- the height H of each groove 181, corresponding to the depth of the longitudinal channels 183, is preferably at least 12 mm, and preferably at least 20 mm.
- the detour roller 18 preferably has a maximum of 36 equidistant longitudinal grooves.
- the spacing E between the apices 181a of two adjacent grooves 181 is preferably at least 16 mm.
- the area A in cross-section of each longitudinal channel 183 ( figure 4 - hatched area between two adjacent grooves) is preferably at least 70 mm 2 .
- the grooves 181 are oriented parallel to the longitudinal axis 18a of the detour roller 18.
- the longitudinal axis of the grooves 181 could make a non-zero angle relative to the longitudinal axis 18a of the detour roller. More particularly, but not necessarily, this non-zero angle may be less than or equal to 45 °.
- the outer diameter D of the cylinder 180 was 180 mm; the height H of each annulus 181 ', corresponding to the depth of the circumferential channels 183', was 23 mm; the spacing E between the vertices 181a of two neighboring rings 181 'was 33 mm.
- the cross-sectional area A of each circumferential channel 183 ' was approximately 620 mm 2 .
- the spreader-lapper could be used to manipulate a monolayer or multilayer web 1 whose thickness (before compression) could be up to 40 mm, with a web displacement speed of up to 350 m / min.
- the invention is not limited to the implementation of a corrugated detour roll 18 having the dimensional characteristics mentioned above. More generally, for an implementation of the invention with webs 1 whose thickness (before compression) is between 10 mm and 40 mm, the detour roll 18 of Figures 5 and 6 preferably, but not necessarily, at least one of the following dimensions.
- the height H of each annulus 181 ', corresponding to the depth of the circumferential channels 183', is preferably at least 15 mm, and preferably at least 20 mm.
- the spacing E between the peaks 181a of two neighboring rings 181 ' is preferably at least 20 mm.
- the cross-sectional area A of each circumferential channel 183 ' is preferably at least 250 mm 2 .
- the corrugations 181 ' are oriented perpendicularly to the longitudinal axis 18a of the detour roller 18.
- the corrugations 181' could make a non-zero angle with respect to the longitudinal axis 18a of the detour roller. More particularly, but not necessarily, this non-zero angle may be less than or equal to 45 °.
- the corrugations may also form a helix around the diverting roller 18 (no screws). In this case, half of the length of the detour roll 18 will be equipped with a corrugation with a right helix pitch and the second half with a left helix pitch to cancel the displacement effects that a propeller could induce the mat in contact with the detour roller 18.
- FIG 7 another variant embodiment of a spreader-entry input carriage of the invention in which the veneer wall of the veil against the diverting roller 18 is formed by a portion 40 of an additional endless belt 4 ' , which is distinct from the rear carpet 4.
- the function of transport of the web provided by the rear carpet 4 is thus dissociated from the veil plating function provided by the additional mat 4 '.
- This dissociation of plating and transport functions can have several advantages. It makes it possible to solve potential problems of marking the rear carpet 4 by the tops of the corrugations or grooves of the detour roll 18 which may in some cases appear with the variant of the figure 2 .
- the veneer mat 4 ' can indeed be a carpet thicker and less sensitive to marking than the rear carpet 4.
- This solution of the figure 7 also makes it possible to overcome the potential problems of speed differentials that can be induced in the case of the variant of the figure 2 by the thickness of the veil 1 during the reversal.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Nonwoven Fabrics (AREA)
Description
La présente invention concerne la fabrication de non-tissés dans le domaine textile, et a pour objet un perfectionnement apporté à un chariot mobile d'entrée d'étaleur-nappeur ainsi qu'un étaleur-nappeur équipé dudit chariot perfectionné.The present invention relates to the manufacture of nonwovens in the textile field, and relates to an improvement made to a mobile spreader-entry input carriage and a crosslapper equipped with said improved carriage.
Dans un type connu d'étaleur-nappeur, décrit notamment dans les demandes de brevet européen
La longueur de la zone de pincement entre le tapis avant et le tapis arrière 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 le tapis avant 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.The length of the nip between the front mat and the rear mat can be changed by moving the input carriage back and forth. This makes it possible to absorb the gap between the continuous arrival of the web on the front carpet and the unwinding of the web from a moving output carriage back and forth over a perpendicular receiving deck moving in continuous and on which is formed the web constituted by the folded web.
Un 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 se 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.A widely known disadvantage of this configuration stems from the fact that, when the veil reverses, it undergoes a centrifugal force with the consequence that it has a tendency to separate from the carpet, which subsequently affects the homogeneity of the formed ply. . The web is also subject to its own inertia due to its transport speed relative to the carriage. In a crosslapper, the reversal of the web in the entrance carriage is therefore one of the critical moments when the web may peel off and become deformed.
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, notamment des voiles condensés présentant une plus faible résistance dans la direction d'entrée, 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 thus to obtain a good quality web. This is unsatisfactory because for some sails, including condensed sails with a lower resistance in the direction of entry, the speeds must be very low greatly limiting the rate of production of the sheet. On the other hand, it is known that a card can produce a sail at high speed and that increasing the speed of the spreader-lapper would increase the overall production of the web.
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 entraîne 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 web at the entry of the crosslapper by creating a speed 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 plies in the sheet.
Dans le
Plus particulièrement, ces moyens de maintien peuvent être réalisés sous la forme d'un rouleau perforé. De manière optionnelle, ce rouleau perforé peut comporter sur sa périphérie des cannelures longitudinales ou des annelures circonférentielles qui, selon l'enseignement de ce brevet européen
En l'absence d'aspiration, la solution décrite dans le brevet européen
On est donc en pratique contraint, pour obtenir un fonctionnement correct à vitesse élevée, de systématiquement mettre en oeuvre une aspiration. Or la mise en oeuvre de moyens d'aspiration en combinaison avec un cylindre perforé augmente de manière importante le coût de fabrication et de fonctionnement du chariot d'entrée de l'étaleur-nappeur. Egalement, lorsque le voile textile est un voile condensé multicouche, on a en pratique des difficultés à maintenir correctement la couche supérieure du voile à la surface du cylindre perforé aspirant.It is therefore in practice constrained, to obtain correct operation at high speed, to systematically implement a suction. Or the implementation of suction means in combination with a perforated cylinder significantly increases the cost of manufacture and operation of the input carriage of the crosslapper. Also, when the textile web is a multilayer condensed web, it is in practice difficult to properly maintain the upper layer of the web on the surface of the suction perforated cylinder.
La présente invention a pour but de proposer une autre solution pour améliorer la stabilité du transport d'un voile textile de fibres au moment où il effectue son retournement dans le chariot d'entrée d'un étaleur-nappeur avant d'être pris en charge en sens inverse par le tapis mobile arrière, ladite solution de l'invention ne nécessitant pas la mise en oeuvre de moyens d'aspiration.The object of the present invention is to propose another solution for improving the stability of the transport of a textile fiber fleece at the moment when it reverses in the input carriage of a crosslapper before being supported. in reverse by the rear moving belt, said solution of the invention does not require the implementation of suction means.
L'invention a ainsi pour objet un chariot d'entrée d'étaleur-nappeur mobile en va et vient, comportant un tapis avant mobile, un tapis arrière mobile associé au tapis avant et des moyens de retournement permettant de retourner un voile textile de fibres lors de son transfert du tapis avant sur le tapis arrière. Les moyens de retournement comportent un rouleau de détour non aspirant et imperméable à l'air, et une paroi de placage imperméable à l'air qui permet de comprimer ledit voile textile de fibres contre le rouleau de détour dans la portion courbe du rouleau de détour où le voile textile de fibres effectue son demi-tour. Ledit rouleau de détour est pourvu sur sa périphérie de cannelures longitudinales qui délimitent à la surface du rouleau de détour des canaux longitudinaux, ou d'annelures circonférentielles qui délimitent à la surface du rouleau de détour des canaux circonférentiels, lesdits canaux longitudinaux ou circonférentiels étant adaptés pour contenir et canaliser tout l'air qui est expulsé du voile lors de sa compression entre le rouleau de détour et la paroi de placage.The invention thus relates to a moving spreader-lapper input carriage reciprocating, comprising a movable front mat, a movable rear mat associated with the front mat and turning means for returning a fiber textile veil when transferring the carpet to the rear carpet. The turning means comprise a non-suction and air-impervious detour roll, and an impervious wall of veneer which makes it possible to compress said textile fiber fleece against the detour roll in the curved portion of the detour roll or the fiber textile veil performs its U-turn. Said detour roller is provided on its periphery with longitudinal grooves which define on the surface of the detour roller longitudinal channels, or circumferential annular grooves which define on the surface of the detent roller circumferential channels, said longitudinal or circumferential channels being adapted to contain and channel all the air that is expelled from the web during its compression between the detour roller and the veneer wall.
L'invention a également pour objet un procédé de retournement d'un voile textile de fibres qui est caractérisé en ce que on fait effectuer un demi-tour au voile textile de fibres lors de son transfert entre un tapis avant mobile et un tapis arrière mobile associé au tapis avant, en utilisant un rouleau de détour non aspirant imperméable à l'air, et pourvu sur sa périphérie de cannelures longitudinales , qui délimitent à la surface du rouleau de détour des canaux longitudinaux, ou d'annelures circonférentielles, qui délimitent à la surface du rouleau de détour des canaux circonférentiels, et on comprime ledit voile textile de fibres contre le rouleau de détour au moyen d'une paroi de placage imperméable à l'air, dans la portion courbe du rouleau de détour où le voile textile de fibres effectue son demi-tour, de telle sorte que tout l'air qui est expulsé du voile lors de sa compression entre le rouleau de détour et la paroi de placage est contenu et canalisé dans les canaux longitudinaux ou circonférentiels du rouleau détour.The subject of the invention is also a process for turning a fiber textile veil which is characterized in that the textile fiber veil is made to turn during its transfer between a moving front mat and a rear mat. movable associated with the front carpet, using an air-tight non-suction detour roll, and provided on its periphery with longitudinal grooves, which define on the surface of the detour roller longitudinal channels, or circumferential corrugations, which delimit on the surface of the circumferential channel detent roll, and compressing said textile fiber web against the detour roll by means of an airtight veneer wall, in the curved portion of the detour roll where the textile veil of fibers performs its half-turn, so that all the air that is expelled from the web during its compression between the detour roll and the veneer wall is contained and channeled in the longitudinal or circumferential channels of the detour roll.
Quelle que soit la variante de réalisation du rouleau de détour (rouleau annelé ou cannelé), le chariot d'entrée d'étaleur-nappeur de l'invention peut présenter également l'une et/ou l'autre des caractéristiques suivantes :
- la paroi de placage peut être formée par une portion du tapis sans fin arrière qui épouse la courbure du rouleau de détour dans la zone de retournement du voile et qui est, en l'absence de voile, au contact du sommet des cannelures longitudinales ou annelures du rouleau de détour ;
- la paroi de placage peut également être formée par une portion d'un tapis sans fin additionnel, qui est distinct du tapis arrière, qui épouse la courbure du rouleau de détour dans la zone de retournement du voile et qui est, en l'absence de voile, au contact du sommet des cannelures longitudinales ou annelures du rouleau de détour.
- the wall of veneer may be formed by a portion of the rear endless belt which matches the curvature of the detour roller in the area of turnaround of the web and which is, in the absence of a web, in contact with the top of the longitudinal grooves or corrugations detour roll;
- the veneer wall may also be formed by a portion of an additional endless carpet, which is distinct from the rear carpet, which matches the curvature of the detour roll in the area where the veil is turned and which is, in the absence of sail, in contact with the top of the longitudinal grooves or annealing of the detour roll.
L'invention a également pour objet un étaleur-nappeur dans lequel un voile textile de fibres arrive en continu sur un tapis sans fin avant puis entre dans un chariot d'entrée mobile en va-et-vient où il effectue un demi-tour pour être repris ensuite par un tapis arrière sans fin amené en continu dans ledit chariot dans un sens opposé au sens d'arrivée du tapis avant, en sortie du chariot. Le voile est maintenu par pincement entre les deux tapis avant et arrière et ensuite repris par un second chariot mobile de sortie, ayant pour fonction d'étaler le voile en va-et-vient sur un tablier se déplaçant en continu perpendiculairement au déplacement du chariot de sortie de manière à former une nappe constituée de plis décalés. Ledit chariot mobile d'entrée est un chariot visé précédemment.The invention also relates to a lapper-spreader in which a fiber textile web arrives continuously on a front endless belt and then enters a movable input carriage back and forth where it performs a half turn to then be taken up by an endless conveyor conveyed continuously in said carriage in a direction opposite to the direction of arrival of the front carpet, at the output of the carriage. The web is held by pinching between the two front and rear mats and then taken up by a second mobile exit carriage, whose function is to spread the sail back and forth on an apron moving continuously perpendicular to the movement of the carriage of output so as to form a web consisting of offset folds. Said movable input carriage is a previously referred carriage.
La présente invention sera mieux comprise à la lumière de la description qui va suivre d'exemples particuliers de réalisation, laquelle description est faite en référence aux dessins annexés sur lesquels :
- la
figure 1 est une vue partielle en coupe en élévation illustrant un étaleur-nappeur de l'état de la technique auquel on peut appliquer la présente invention; - la
figure 2 est une vue schématique en coupe d'un chariot d'entrée d'étaleur-nappeur conforme à une première variante de l'invention, - la
figure 3 est une représentation en perspective d'une première variante de réalisation d'un rouleau de détour cannelé pouvant être mis en oeuvre dans le chariot defigure 2 , - la
figure 4 est une vue en coupe transversale du rouleau détour cannelé de lafigure 3 , - la
figure 5 est une représentation en perspective d'une deuxième variante de réalisation d'un rouleau de détour annelé pouvant être mis en oeuvre dans le chariot defigure 2 , - la
figure 6 est une vue en coupe longitudinale du rouleau de détour annelé de lafigure 5 , - la
figure 7 est une vue schématique en coupe d'un chariot d'entrée d'étaleur-nappeur conforme à une deuxième variante de l'invention.
- the
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; - the
figure 2 is a schematic sectional view of a spreader-entry input carriage according to a first variant of the invention, - the
figure 3 is a perspective representation of a first variant embodiment of a fluted detour roll which can be implemented in the trolley offigure 2 , - the
figure 4 is a cross-sectional view of the fluted detour roll of thefigure 3 , - the
figure 5 is a perspective representation of a second variant embodiment of a corrugated detour roll which can be implemented in the trolley offigure 2 , - the
figure 6 is a longitudinal sectional view of the ringed detour roll of thefigure 5 , - the
figure 7 is a schematic cross-sectional view of a spreader-lapper input trolley according to a second variant of the invention.
La
Sur la
Sur la
Dans ce chariot 3 de la
- un rouleau fou monté libre en rotation et entraîné par adhérence au tapis arrière, ou
- un rouleau relié via une transmission (par exemple par une courroie synchrone) à un autre rouleau entrainé en rotation par le tapis avant ou le tapis arrière, ou
- un rouleau entraîné via un motoréducteur embarqué dans le chariot d'entrée.
- an idler roll mounted free to rotate and driven by adherence to the rear carpet, or
- a roller connected via a transmission (for example by a synchronous belt) to another roller rotated by the front carpet or the rear carpet, or
- a roller driven via a geared motor embedded in the input carriage.
Le tapis arrière plein 4 est guidé en amont du rouleau de détour 18 par deux rouleaux de guidage 19 et 20, et en aval du rouleau de détour 18 par un rouleau de guidage 21.The solid
On a représenté sur les
On a représenté sur les
Les cannelures longitudinales 181 ou annelures circonférentielles 181' peuvent être obtenues par usinage d'un cylindre de départ d'épaisseur suffisante. Les cannelures longitudinales 181 peuvent également être obtenues par filage du tube 180 (par exemple profilé aluminium). Les cannelures longitudinales 181 ou annelures circonférentielles 181' peuvent également être des cannelures ou annelures d'un manchon rapporté qui est enfilé et fixé autour d'un cylindre. La longueur L du rouleau de détour 18 est au moins égale, et de préférence supérieure à la largeur de voile 1.The
Dans les variantes de réalisation illustrées sur les
Les rouleaux de guidage 20 et 21 du tapis plein 4 sont positionnés par rapport au rouleau de détour 18 de telle sorte qu'une portion 40 du tapis arrière plein 4 épouse une partie de la périphérie du rouleau de détour 18 en étant, en l'absence de voile 1, au contact du sommet 181 a des cannelures 181 ou annelures 181' du rouleau de détour 18.The guide rolls 20 and 21 of the
En fonctionnement, le voile 1 est transporté à la surface du tapis avant 2 jusqu'au rouleau de guidage 16, au niveau duquel le voile 1 quitte le tapis avant 2 et est repris à la périphérie du rouleau de détour 18, entre le rouleau de détour 18 et la portion 40 du tapis arrière plein 4In operation, the
Le voile 1 est retourné en étant emprisonné et comprimé entre les cannelures 181 ou annelures 181' du rouleau de détour 18 et la portion 40 du tapis 4 qui forme une paroi de placage imperméable l'air. De préférence, afin d'éviter des déformations locales irréversibles du voile 1 lors de sa compression, le sommet 181 a de chaque cannelure 181 ou annelure 181' présente un profil arrondi.The
Ensuite, le voile 1 comprimé est transporté en sortie du rouleau de détour 18 par le tapis 4, en étant pincé entre le tapis 4 arrière et le tapis avant 2.Then, the
Au cours de son passage entre le cylindre de détour 18 et la portion 40 du tapis 4, sous l'effet de la compression du voile 1 entre le tapis plein 4 et les sommets 181a des cannelures longitudinales 181 ou des annelures circonférentielles 181', l'air qui était emprisonné dans le voile 1 est expulsé dans les canaux longitudinaux 183 entre les cannelures 181 ou dans les canaux circonférentiels 183' entre les annelures 181'.During its passage between the diverting
Le volume de ces canaux 183 ou 183' est suffisant pour contenir tout l'air qui est expulsé du voile 1 lors de sa compression entre le tapis 4 et les cannelures 181 ou annelures 181', de telle sorte que cet air se trouve canalisé dans ses canaux 183 ou 183' pendant la rotation du rouleau de détour 18. Ainsi, en fonctionnement, l'air contenu dans chaque portion du voile 1 comprimée entre le tapis plein 4 et deux annelures voisines 181' du rouleau de détour 18 (cf
Il en résulte que pendant tout son trajet de retournement, le voile 1 est parfaitement maintenu sur toute sa largeur (y compris au niveau de ses lisières longitudinales), et les forces d'inertie et centrifuge liées à la dynamique du chariot mobile 3 sont sans influence sur la structure du voile. Il en découle que l'on peut avantageusement augmenter le cas échéant la vitesse de fonctionnement de l'étaleur-nappeur nappeur sans altérer la structure du voile. En outre, le maintien par compression du voile 1 permet avantageusement l'utilisation de l'étaleur-nappeur avec des voiles pouvant être multicouche, sans risque de décollement ou glissement des couches du voile.As a result, throughout its reversal path, the
Dans un exemple précis de réalisation, donné à titre indicatif et non limitatif de l'invention, et en référence au rouleau de détour cannelé de la
L'invention n'est pas limitée à la mise en oeuvre d'un rouleau détour cannelé 18 présentant les caractéristiques dimensionnelles précitées. Plus généralement, pour une mise en oeuvre de l'invention avec des voiles 1 dont l'épaisseur (avant compression) est comprise entre 10 mm et 40 mm, le rouleau de détour 18 des
Dans la variante des
Dans un exemple précis de réalisation, donné à titre indicatif et non limitatif de l'invention, et en référence au rouleau de détour annelé des
L'invention n'est pas limitée à la mise en oeuvre d'un rouleau détour annelé 18 présentant les caractéristiques dimensionnelles précitées. Plus généralement, pour une mise en oeuvre de l'invention avec des voiles 1 dont l'épaisseur (avant compression) est comprise entre 10 mm et 40 mm, le rouleau de détour 18 des
Dans la variante des
On a représenté sur la
Claims (13)
- An inlet carriage (3) of a back and forth moving cross lapper, comprising a moving front belt (2), a moving rear belt (4) associated with the front belt, and reversal means making it possible to reverse a fiber textile web (1) when it is transferred from the front belt to the rear belt, characterized in that the reversal means comprise a non-suction air impermeable reversal roller (18), and an air impermeable pressing wall (40) that makes it possible to compress said fiber textile web (1) against the reversal roller (18) in the curved portion of the reversal roller where the fiber textile web performs its half-turn, and in that said reversal roller (18) is provided on the periphery thereof with longitudinal splines (181) which delimit, on the surface of the reversal roller, longitudinal channels (183), or circumferential corrugations (181') which delimit, on the surface of the reversal roller, circumferential channels (183'), said longitudinal (183) or circumferential (183') channels being adapted to contain and channel all the air expelled from the web (1) during the compression thereof between the reversal roller (18) and the pressing wall (40).
- The carriage according to claim 1, characterized in that the pressing wall is formed by a portion (40) of the endless rear belt (4) that fits the curve of the reversal roller (18) in the reversal zone of the web and which is, in the absence of web (1), in contact with the apex (181a) of the longitudinal splines (181) or corrugations (181') of the reversal roller (18).
- The carriage according to claim 1, characterized in that the pressing wall is formed by a portion (40) of an additional endless belt (4'), which is separate from the rear belt (4), which fits the curve of the reversal roller (18) in the reversal zone of the web and which is, in the absence of web (1), in contact with the apex (181a) of the longitudinal splines (181) or corrugations (181') of the reversal roller (18).
- The carriage according to any one of the preceding claims, characterized in that the height (H) of the splines (181) of the reversal roller (18) is equal to at least 12 mm, and preferably 20 mm.
- The carriage according to any one of the preceding claims, characterized in that the reversal roller (18) comprises at most 36 equidistant longitudinal splines (181).
- The carriage according to any one of the preceding claims, characterized in that the spacing (E) between the apices (181a) of two neighboring splines (181) is equal to at least 16 mm.
- The carriage according to any one of the preceding claims, characterized in that the area (A) in transverse section of each longitudinal channel (183) is equal to at least 70 mm2.
- The carriage according to any one of claims 1 to 3, characterized in that the height (H) of the corrugations (181') of the reversal roller (18) is equal to at least 15 mm, and preferably at least 20 mm.
- The carriage according to any one of claims 1, 2, 3 or 8 characterized in that the spacing (E) between the apices (181a) of two adjacent corrugations (181') is equal to at least 20 mm.
- The carriage according to any one of claims 1, 2, 3, 8, 9, characterized in that the area (A) in transverse section of each circumferential channel (183') is equal to at least 250 mm2.
- A cross lapper in which a fiber textile web (1) continuously arrives on an endless front belt (2), then enters an inlet back and forth moving carriage (3) where it performs a half-turn to then be taken up by an endless rear belt (4) continuously brought into said carriage (3) in a direction opposite the intake direction of the front belt (2), at the outlet of the carriage (3), the web (1) being maintained by pinching between the two front and rear belts (2, 4) and then taken up by a second moving outlet carriage (5), serving to spread the web back and forth on an apron (6) continuously moving perpendicular to the movement of the outlet carriage (5) so as to form a layer made up of offset plies, characterized in that the moving inlet carriage (3) is a carriage according to any one of the preceding claims.
- A method for reversing a fiber textile web (1), characterized in that the fiber textile web (1) is made to perform a half-turn when it is transferred between a moving front belt (2) and a moving rear belt (4) associated with the front belt (2), using a non-suction air impermeable reversal roller (18) and provided on the periphery thereof with longitudinal splines (181), which delimit, on the surface of the reversal roller, longitudinal channels (183), or circumferential corrugations (181'), which delimit circumferential channels (183') on the surface of the reversal roller, and said fiber textile web (1) is compressed against the reversal roller (18) using an air impermeable pressing wall (40) in the curved portion of the reversal roller where the fiber textile web performs its half-turn, such that all the air is expelled from the web (1) when it is compressed between the reversal roller (18) and the pressing wall (40) is contained and channeled in the longitudinal (183) or circumferential (183') channels of the reversal roller.
- The method according to claim 12, wherein the pressing wall consists of a portion (40) of the rear belt (4) that fits the curve of the reversal roller (18) in the reversal zone of the web and which is, in the absence of web (1), in contact with the apex (181a) of the longitudinal splines (181) or corrugations (181') of the reversal roller (18), or a portion (40) of an additional belt (4'), which is separate from the rear belt (4), which fits the curve of the reversal roller (18) in the reversal zone of the web and which is, in the absence of web (1), in contact with the apex (181a) of the longitudinal splines (181) or corrugations (181') of the reversal roller (18).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1051643A FR2957092B1 (en) | 2010-03-08 | 2010-03-08 | MOVING CARRIER OF INPUT OF FLOORING BEAM COMPRISING A ROLL OF DETOUR WITH CANNELURES OR ANNELURES |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2365113A1 EP2365113A1 (en) | 2011-09-14 |
EP2365113B1 EP2365113B1 (en) | 2012-11-07 |
EP2365113B2 true EP2365113B2 (en) | 2016-05-18 |
Family
ID=43302918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11305142.9A Active EP2365113B2 (en) | 2010-03-08 | 2011-02-10 | Inlet carriage of a cross layer with grooved web reversal roller |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2365113B2 (en) |
CN (1) | CN102190180B (en) |
ES (1) | ES2396626T5 (en) |
FR (1) | FR2957092B1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012102597U1 (en) * | 2012-07-13 | 2013-10-14 | Hi Tech Textile Holding Gmbh | lapper |
EP3239371B1 (en) * | 2016-04-29 | 2021-06-23 | Oskar Dilo Maschinenfabrik KG | Fibrous web laying device |
FR3063741A1 (en) * | 2017-03-09 | 2018-09-14 | Andritz Asselin Thibeau | FLATNESS |
CH714818A1 (en) * | 2018-03-21 | 2019-09-30 | Rieter Ag Maschf | Tape forming unit for a card. |
CN111692865B (en) * | 2019-03-15 | 2023-04-07 | 斯帕有限公司 | Reversing mechanism |
CN116280528B (en) * | 2023-04-04 | 2023-09-15 | 广州佳兴自动化工程有限公司 | Automatic pipe inserting machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2219100A1 (en) † | 1973-02-27 | 1974-09-20 | Johns Manville | |
EP1367166A1 (en) † | 2002-05-28 | 2003-12-03 | Asselin | Movable carriage at the entrance to a cross lapper and cross lapper equipped with such a carriage |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH280046A (en) * | 1950-01-28 | 1951-12-31 | Naville Raoul | Conveyor device for webs of paper, cellulose felt, fabric or the like. |
US3808765A (en) * | 1973-02-27 | 1974-05-07 | Johns Manville | Inverting and reversing conveyor |
US5289617A (en) | 1991-06-03 | 1994-03-01 | Asselin (Societe Anonyme) | Spreading and lap-forming machine |
FR2791364B1 (en) | 1999-03-23 | 2001-06-08 | Asselin | SPREADER |
EP1589132B1 (en) * | 2004-04-22 | 2007-06-13 | Asselin-Thibeau | Carding machine with a rotating suction transfer device |
DE202004020165U1 (en) * | 2004-12-23 | 2006-05-04 | Autefa Automation Gmbh | lapper |
FR2894600B1 (en) * | 2005-12-13 | 2008-02-29 | Asselin Thibeau Soc Par Action | TRANSPORTING A NON-WOVEN WEB BY MEANS OF A TRANSPORT BAND WITH ASCENDING AND / OR VARIABLE SPEED PORTION |
EP1959038B1 (en) * | 2007-02-15 | 2010-04-14 | Oskar Dilo Maschinenfabrik KG | Device for laying a fleece |
-
2010
- 2010-03-08 FR FR1051643A patent/FR2957092B1/en active Active
-
2011
- 2011-02-10 EP EP11305142.9A patent/EP2365113B2/en active Active
- 2011-02-10 ES ES11305142.9T patent/ES2396626T5/en active Active
- 2011-03-08 CN CN201110055228.7A patent/CN102190180B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2219100A1 (en) † | 1973-02-27 | 1974-09-20 | Johns Manville | |
EP1367166A1 (en) † | 2002-05-28 | 2003-12-03 | Asselin | Movable carriage at the entrance to a cross lapper and cross lapper equipped with such a carriage |
Also Published As
Publication number | Publication date |
---|---|
EP2365113A1 (en) | 2011-09-14 |
FR2957092B1 (en) | 2012-03-23 |
ES2396626T3 (en) | 2013-02-22 |
FR2957092A1 (en) | 2011-09-09 |
EP2365113B1 (en) | 2012-11-07 |
CN102190180B (en) | 2015-04-29 |
CN102190180A (en) | 2011-09-21 |
ES2396626T5 (en) | 2016-11-16 |
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