EP1318217A1 - Carding machine with an accumulator transfer cylinder - Google Patents

Carding machine with an accumulator transfer cylinder Download PDF

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Publication number
EP1318217A1
EP1318217A1 EP02370037A EP02370037A EP1318217A1 EP 1318217 A1 EP1318217 A1 EP 1318217A1 EP 02370037 A EP02370037 A EP 02370037A EP 02370037 A EP02370037 A EP 02370037A EP 1318217 A1 EP1318217 A1 EP 1318217A1
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EP
European Patent Office
Prior art keywords
cylinder
carding
drum
card
periphery
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.)
Withdrawn
Application number
EP02370037A
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German (de)
French (fr)
Inventor
Jean-Louis Dupont
Marc Brabant
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Thibeau SA
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Thibeau SA
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Publication date
Application filed by Thibeau SA filed Critical Thibeau SA
Publication of EP1318217A1 publication Critical patent/EP1318217A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/04—Carding machines with worker and stripper or like rollers operating in association with a main cylinder
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers

Definitions

  • the present invention relates to the textile field, and more particularly the field of production of nonwovens by means of a card. Its main objects are a new card, the output has been perfected, as well as a new production process of a carded nonwoven.
  • the invention preferably finds, but does not exclusively, its application to high speed production (typically production speeds greater than or equal to 150 m / min), of carded nonwovens composed of fibers of the type Polypropylene, Polyethylene, cotton, viscose, etc ...
  • a card for the production of a nonwoven comprises of basically at least one rotary carding drum, again commonly known as the main drum or large drum, at the periphery of which are mounted carding organs.
  • the fibers transported to the periphery of the drum carding are individualized (fiber carding operation) by combined actions of the carding organs and the lining carding drum device.
  • these carding organs are composed by one or multiple successive carding groups, each carding group being composed of a roller commonly called “worker” associated with a “scrubber” roller, also called a “sweeper”.
  • these carding organs can be fixed and be in the form of a fixed fairing (again commonly called “carding plate”) comprising a plurality carding points fixed at the periphery of the carding drum.
  • a first known card output configuration allowing the production of a parallel nonwoven, implements, as cylinders for forming the non-woven veil, one or more successive combing cylinders.
  • a second known card output configuration allowing the production of a scrambled nonwoven, implements, in as cylinders for forming the nonwoven web, a cylinder commonly known as a "counter-drum” followed by a cylinder comber.
  • a third known card output configuration allowing the production of a condensed nonwoven, implements, in as cylinders for forming the nonwoven web, a cylinder comb, followed by at least one condensing cylinder; most of time the comb cylinder is followed by two condensing cylinders successive.
  • a fourth known card output configuration highlights work, by way of cylinders for forming the non-woven veil, a counter-drum cylinder followed by a painter cylinder and a cylinder condenser.
  • the drum carding plays a role in both the function of individualization fibers (carding of fibers by carding organs in cooperation with the carding drum), and in the formation of the nonwoven web at the end of the card by the sail forming cylinders, from the individualized fibers transported around the drum carding.
  • the speed of rotation of the carding drum is an adjustment parameter which conditions preponderant both the carding quality of the fibers at the periphery of the carding drum by the carding organs, and the properties mechanics of the nonwoven produced (isotropy, grammage, ).
  • obtaining the required quality of carding fibers requires adjusting the speed of rotation of the carding drum in a relatively narrow speed range, and from that carding drum speed adjustment, card designer deduces the speed settings of the sail forming cylinders, kind of obtaining a nonwoven with mechanical properties required (grammage, isotropy, ).
  • the card designer Since the speed setting range of the drum carding is narrow compared to the fiber carding function which must be provided by this drum, the card designer is in limited practice in its choice for the rotational speeds of the non-woven veil forming cylinders, and thereby in the adjustment of the production speed of the nonwoven at the card exit. In Besides, it is difficult to increase the production speed of the nonwoven at the end of the card, without damaging the mechanical properties of the web.
  • the present invention aims to propose a new carding structure which overcomes the aforementioned drawback, in that it offers greater flexibility in adjusting the speed of the cylinders formation of nonwoven.
  • Another object of the invention is to be able increase the production speed of the card, without damaging the mechanical properties of the nonwoven produced.
  • the card of the invention is known in that it comprises a carding drum, carding members mounted on the periphery of the carding drum and at least one carding outlet comprising at least minus a first cylinder for forming a nonwoven veil.
  • the card has an accumulator transfer cylinder between the drum carding and the first cylinder for forming a nonwoven web.
  • the accumulator transfer cylinder of the card of the invention has the function of simply taking up the fibers transported to the periphery of the carding drum without working them during their transfer from the carding drum, and supplying fibers to the first sail-forming cylinder, forming a tampon accumulator between the carding drum and the first cylinder of formation of haze, due to the recycling of fibers at the periphery of the transfer cylinder.
  • the fiber recovery function which must be ensured by the cylinder transfer accumulator is not very restrictive in terms of speed adjustment of this cylinder, and can advantageously be obtained by adjusting the speed of rotation of the accumulator transfer cylinder in a very wide speed range;
  • the rotation speed of the cylinder transfer is set so that its circumferential speed is greater than the circumferential speed of the carding drum. he thus becomes easy to adjust the rotation speed of this cylinder transfer in this very wide range, so regulate so optimal fiber supply to the first forming cylinder of the fleece, and so that this speed is adapted to desired production characteristics (production speed, mechanical properties required for the nonwoven product (grammage, isotropic, ..).
  • this accumulator transfer cylinder advantageously allows to obtain a better decoupling between on the one hand the function of carding (individualization of the fibers by carding between the drum carding the carding organs) and the training function non-woven veil provided by the successive cylinder or cylinders downstream of the accumulator transfer cylinder.
  • Another subject of the present invention is also a method for producing a nonwoven using a card of the invention. According to this method, each rotation of the carding drum of the card, we resume using the accumulator transfer cylinder plus 90%, and preferably 100% of the fibers transported to the periphery carding drum.
  • the production line shown in Figure 1 allows the parallel production of two nonwoven webs W1 and W2, which are deposited and transported on two transport belts B. At one stage subsequent to manufacture, these two nonwovens W1 and W2 are either separately consolidated by any known means of consolidation, or are for example superimposed so as to form a nonwoven more thick, which is subsequently consolidated.
  • This production line in Figure 1 includes a traditional 1 loader-loader that feeds, via a conveyor 2, a card 3 with double outlet.
  • Card 3 includes a traditional card entry, constituted by a trough 3a, a food roller 3b and a cylinder breaker 3c.
  • the breaker cylinder 3c supplies a first cylinder of rotary 3d carding, which is commonly known as a front end, and whose the surface is usually coated with a card lining or any other equivalent means allowing it to take up the fibers from the periphery of the breaker cylinder 3c.
  • the front end 3d is also provided on its periphery with several organs cardants, which allow the fibers caught in the filling to be worked of the card of this 3d cylinder, so as to individualize them.
  • these carding members are constituted by several successive pairs of a 3e sweep roller and a roller worker 3f. Downstream of these carding organs, the fibers are taken up from the periphery of the first carding cylinder 3d, and transferred to the state to a second 3h rotary carding cylinder, by a cylinder of 3g transfer, also commonly called "communicator".
  • the second 3h carding cylinder also commonly known as “Large drum” or “main drum” will be designated in the following of the present description by the terms “carding drum”.
  • This carding drum 3h is usually coated on its periphery a card lining allowing it to take up the fibers at the periphery of the communicator 3g. Also, this carding drum 3h is equipped on its periphery with carding organs (3e, 3f) identical to those fitted to the first 3d carding cylinder.
  • the invention is not limited to a card having the configuration particular of card 3 with two carding cylinders of FIG. 1.
  • the 3rd rollers and 3f could be arranged by being juxtaposed one behind the other. others alternately, according to a configuration commonly called "Garnett".
  • the sweeper and worker rollers (3e, 3f) at the the periphery of each carding cylinder could furthermore be replaced by any means of different structure, but fulfilling the same function, i.e.
  • rollers having function, in combination with the carding cylinder, to individualize the fibers on the periphery of the carding cylinder.
  • these rollers could be replaced by static plates, commonly called “Carding plates” mounted on the periphery of the carding cylinder and comprising a plurality of fixed carding points in the form of example of grooves or grooves.
  • Card 3 in Figure 1 has two outputs respectively upper and lower, each outlet comprising in the usual manner sails forming cylinders 3j, 3k.
  • the first sail forming cylinder 3j is a comb cylinder; the second 3k sail forming cylinder is a condensing cylinder.
  • These two cylinders are used in the usual way to form a condensed nonwoven web, from the fibers which are routed to the periphery of the comb cylinder 3j.
  • Each nonwoven (W1, W2) is detached from the periphery of the 3k condenser cylinder by a detaching device, conforming to the device described in the European patent application EP-A-0 704 561.
  • This detaching device essentially comprises a detaching cylinder 31, which allows detach the fiber from the periphery of the 3k condenser cylinder and place on conveyor belt B.
  • This conveyor belt is breathable, and a suction box S is provided at the stain removal area, so as to press the nonwoven by suction to the surface of the conveyor belt B.
  • the element additional 3m is a rotating brush.
  • the first cylinder for forming a non-woven veil such as the comb cylinder 3j
  • the first cylinder for forming a non-woven veil is mounted directly on the periphery of the carding drum 3h.
  • This provision makes it difficult and restrictive to adjust the speed of the 3h carding drum cylinder and forming cylinders sail.
  • the speed of rotation of the carding drum 3h must be set to allow both efficient carding with carding organs 3e and 3f, and to allow effective combing of fibers during their transfer between the 3h cylinder and the first cylinder sail training 3d.
  • the first sail forming cylinder 3j is no longer disposed at the periphery of the carding drum 3h, but card 3 has a accumulator transfer cylinder 3i between the carding drum 3h and each first training cylinder 3j of a nonwoven veil.
  • this accumulator transfer cylinder 3i is adjacent to each first 3j sail forming cylinder of each of the two outputs.
  • This accumulator transfer cylinder 3i generally has function of taking up the fibers at the periphery of the drum carding 3h, and to transfer them in the state, without making them undergo a work particular, in contrast for example with the reorientation of the fibers which is produced by a sail forming cylinder such as a cylinder comber 3j or a condenser cylinder 3k.
  • This 3i transfer cylinder plays therefore, on the one hand, a role of simple communicator vis-à-vis the carding drum 3h, and on the other hand performs a function of fiber distribution and regulating the feed rate of these fibers vis-à-vis each first veil forming cylinder 3j.
  • the accumulator transfer cylinder 3i is equipped on its periphery with a metal trim G, one of which exemplary embodiment is illustrated in FIGS. 2 and 3.
  • This gasket G is made up of a plurality of teeth 4.
  • the double arrow L represents the direction parallel to the longitudinal axis of the accumulator transfer cylinder 3i, i.e. the direction orthogonal to the plane of Figure 1.
  • Figure 3 is a sectional view of the lining of the accumulator transfer cylinder 3i according to a plan transverse to the longitudinal axis of the accumulator transfer cylinder 3i.
  • each tooth 4 of the lining G is aligned as adjacent rows parallel to the axis longitudinal of the accumulator transfer cylinder 3i; in figure 2, only two adjacent rows of teeth 4 have been shown.
  • each tooth 4 of the lining G is inclined with respect to the radius of the accumulator transfer cylinder 3i according to a angle A and is oriented in the direction of rotation of said cylinder (speed circumferential V2).
  • the teeth 4 of the lining G of the transfer cylinder were represented very schematically so to do mainly appear their inclination and their orientation above.
  • the drum of 3h carding is in known manner equipped with a card lining G 'which is usual, and whose teeth 4' are inclined relative to the radius of the carding drum 3h, and are oriented in the direction of rotation of the carding drum 3h.
  • the accumulator transfer cylinder 3i is driven in a direction of rotation which is opposite to the direction of rotation of the carding drum 3h. More particularly, the rotation speed of the transfer drum 3i accumulator is adjusted so that its speed circumferential V2 (figure 4) is greater than the speed circumferential V1 of the carding drum 3h.
  • V2 the speed circumferential
  • the fibers which are transported to the periphery of the drum carding 3h, after having been individualized by the action of the organs cardants 3e, 3f, are taken up in the lining G of the transfer drum accumulator 3i.
  • each fiber is taken up by the teeth 4 of the lining G of the transfer cylinder 3i, without being retained by the teeth 4 'of the lining G' of the carding drum 3h.
  • the result that the fibers are transferred as is, without being processed, unlike what happens in a carding structure conventional, when the fibers are taken from the periphery of the drum carding by a cylinder-type sail forming cylinder comber or counter-drum cylinder.
  • the drum transfer accumulator 3i the maximum of fibers (at least 90%) transported by the carding drum, and preferably 100% of these fibers.
  • the speed is judiciously adjusted circumferential V2 of the accumulator transfer cylinder 3i with respect to at the circumferential speed V1 of the carding drum 3h.
  • the speed ratio (V2 / V1) is greater than or equal to 1.2, and preferably greater than or equal to 1.3.
  • the absence of recycling fibers at the periphery of the 3h carding drum allows advantageously to avoid filling the card lining of the carding drum 3h. So the new fibers that are introduced at the entry of the carding drum 3h by the communicating cylinder 3g, are taken up by an empty filling, instead of a filling filled in the traditional solution.
  • the teeth of the trim carding the drum for 3 hours thus provides a better effect carding in cooperation with the peripheral carding members 3f, 3rd, and thereby better carding of the fibers transported to the periphery of the drum 3h.
  • the speed adjustment rotation of the carding drum 3h can be done almost independent with respect to the rotational speeds of the cylinders formation of sails 3d, 3k.
  • the speed of 3h carding drum rotation is set with concern only the carding quality of the fibers between this drum and the carding organs 3f, 3e.
  • the speed of rotation of the drum is adjusted 3i accumulator transfer, so as to meet the speed criterion above, which is not very restrictive (circumferential speed V2 of the accumulator transfer cylinder 3i higher than speed circumference V1 of the carding drum 3h).
  • the speeds of respective rotation of the sail forming cylinders 3j and 3k will adjusted so as to obtain the desired work for the fibers.
  • the rotational speed of the 3j combing cylinder will be adjusted from so that its circumferential speed is less than the speed circumferential of the accumulator transfer drum 3i.
  • the circumferential speed of the comb cylinder 3j is lower or equal to 25% of the circumferential speed of the transfer drum accumulator 3i.
  • the speed of rotation of the condenser cylinder 3k will be chosen so that its circumferential speed is less than approximately 80% of the circumferential speed of the comb cylinder 3j.
  • the fibers which are taken up at the periphery of the accumulator transfer drum 3i are transported by this drum to two combing cylinders 3j.
  • Each cylinder 3j comber takes part of these fibers, the other part being recycled to the periphery of the accumulator transfer drum 3i.
  • this cylinder is preferably fitted on its periphery of fairings C1, C2 and C3 ( Figure 1).
  • the card 3 comprises one or more carding members, which are mounted at the periphery of the accumulator transfer cylinder 3i.
  • the fairing C1 is replaced by one or several carding plates, which in operation of the card allow the fibers transported to the periphery of the accumulator transfer cylinder 3i.
  • the carding plates could be replaced by any carding device ensuring the same function, for example by one or more pairs of rollers worker and sweeper.
  • these carding organs are positioned in a region upstream of the fiber transfer area (in the case of a single output card) or upstream of the fiber transfer zones (in the case of a card with several outlets) between the accumulator transfer cylinder 3i and each first cylinder 3j for forming a nonwoven web.
  • this preferential region of positioning of the carding organs corresponds to the area of the periphery of the accumulator transfer drum 3i which is occupied by the fairing C1, and which extends between the carding drum 3h and the comb cylinder lower 3d.
  • the diameter d of the transfer drum 3i is less than the diameter D of the carding drum 3h. It advantageously follows that in the card of the invention, the fibers which are recycled to the periphery of the accumulator transfer drum 3i are presented more frequently to the two combing rollers 3j. Thus, if there is a periodic defect on the accumulator transfer drum, this higher frequency of recycling of the fibers makes it possible to generate in the nonwoven product periodic defects which are more difficult to perceive.
  • each 3j comber collects advantageously the fibers from above, which allows gravity to act in a good way on the combers.
  • the transfer drum 3i of the invention allows advantageously a better decoupling between on the one hand the function carding card, and on the other hand the function of forming a non-woven, and thereby better independence in the setting velocities of the elements ensuring these two functions.
  • the speed of rotation of the carding drum 3h will be adjusted so as to optimize the carding operation of the fibers by the carding organs 3e, 3f; the rotation speed of the accumulator transfer cylinder 3i will be set in sort of regulating the fiber feed rate at the inlet of each first sail forming cylinder, and sort of get also the production speed sought for the veil at exit while being set at a speed sufficient for this accumulator transfer cylinder can pick up the fibers at the periphery of the carding drum; the rotation speed of the cylinders sail training will be set to optimize the work performed on the fibers by these cylinders, and thereby optimize the quality of the nonwoven produced (isotropy, weight, etc.).
  • card 3 was used to manufacture in parallel two condensed nonwovens W1 and W2 from polypropylene fibers, of length approximately 40 mm, and of titration being worth approximately 2 , 2 dtex.
  • the diameter D of the carding drum 3h was worth 1500 mm; the diameter d of the accumulator transfer drum 3i was 700 mm; the speed of rotation of the carding drum 3 h was worth approximately 212 rpm, which corresponded to a circumferential speed V1 of approximately 1000 m / min; the rotation speed of the accumulator transfer drum 3i was approximately 590 rpm, which corresponded to a circumferential speed V2 of approximately 1300 rpm; the speed of rotation of each comb cylinder 3j was approximately 91 rpm, which corresponded to a circumferential speed of approximately 200 m / min; the speed of rotation of each condenser cylinder 3k was equal to 162 rpm, which corresponded to a circumferential speed of approximately 150 m / min.
  • the angle (A) of the teeth 4 of the lining G of the accumulator transfer cylinder 3i was approximately 30 °; the height (H) of each tooth 4 was 3.1 mm; the pitch (p) between two rows of teeth 4 was 1.6mm; the distance (e) separating two adjacent teeth 4 of the same row was 3.3 mm.
  • the invention is not limited to a double outlet card, but can of course be applied to cards comprising a single output, or to cards with more than two outputs. Also, the invention is not limited to an outlet whose cylinders sails are formed by a comb cylinder followed by a condensing cylinder, but can be used with any type known of sail forming cylinder. In particular, we can make a card with one or more cylinders for forming a nonwoven web are only combing cylinders. Also, we can consider making a card with the first training cylinder of veil is not a painter cylinder but for example a cylinder against revolving.
  • a card according to the invention an outlet of which is constituted by a counter drum followed by a comb cylinder, or a carder whose outlet is formed by a counter-drum cylinder, followed a comb cylinder and a condenser cylinder, in both cases, the counter-drum cylinder being adjacent to the transfer drum accumulator 3i of the invention.

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

Abstract

A card (3) comprises a carding drum (3h), carding members (3e, 3f) mounted at the periphery of the carding drum, and card outlet(s) having first cylinder (3d) for forming a nonwoven web. The card includes an accumulator transfer cylinder (3i) between the carding drum and the first cylinder for forming a nonwoven web (W1, W2).

Description

La présente invention concerne le domaine textile, et plus particulièrement le domaine de la production de non-tissés au moyen d'une carde. Elle a pour principaux objets une nouvelle carde, dont la sortie a été perfectionnée, ainsi qu'un nouveau procédé de production d'un non-tissé cardé. L'invention trouve préférentiellement, mais non exclusivement, son application à la production à haute vitesse (typiquement vitesses de production supérieures ou égales à 150 m/min), de non-tissés cardés composés de fibres du type Polypropylène, Polyéthylène, coton, viscose, etc...The present invention relates to the textile field, and more particularly the field of production of nonwovens by means of a card. Its main objects are a new card, the output has been perfected, as well as a new production process of a carded nonwoven. The invention preferably finds, but does not exclusively, its application to high speed production (typically production speeds greater than or equal to 150 m / min), of carded nonwovens composed of fibers of the type Polypropylene, Polyethylene, cotton, viscose, etc ...

Une carde pour la production d'un non-tissé comprend de manière essentielle au moins un tambour de cardage rotatif, encore communément désigné tambour principal ou grand tambour, à la périphérie duquel sont montés des organes cardants. En fonctionnement, les fibres transportées à la périphérie du tambour de cardage sont individualisés (opération de cardage des fibres) par les actions combinées des organes cardants et de la garniture périphérique du tambour de cardage. Généralement, et à titre d'exemple non limitatif, ces organes cardants sont composés par un ou plusieurs groupes de cardage successifs, chaque groupe de cardage étant composé d'un rouleau communément appelé « travailleur » associé à un rouleau « débourreur », encore appelé « balayeur ». Dans une autre forme de réalisation, ces organes cardants peuvent être fixes et se présenter sous la forme d'un carénage fixe (encore communément appelé « plaque cardante ») comportant une pluralité de points cardants fixes à la périphérie du tambour de cardage.A card for the production of a nonwoven comprises of basically at least one rotary carding drum, again commonly known as the main drum or large drum, at the periphery of which are mounted carding organs. In operation, the fibers transported to the periphery of the drum carding are individualized (fiber carding operation) by combined actions of the carding organs and the lining carding drum device. Generally, and on a non-limiting example, these carding organs are composed by one or multiple successive carding groups, each carding group being composed of a roller commonly called "worker" associated with a “scrubber” roller, also called a “sweeper”. In another embodiment, these carding organs can be fixed and be in the form of a fixed fairing (again commonly called "carding plate") comprising a plurality carding points fixed at the periphery of the carding drum.

De manière usuelle dans une structure de carde classique, en cours de fonctionnement, à chaque rotation du tambour de cardage, une portion plus ou moins faible des fibres à la périphérie du tambour de cardage est reprise, en un point situé en aval des organes cardants, tandis que la partie résiduelle des fibres à la périphérie du tambour de cardage est recyclée par ce tambour de cardage vers les organes cardants. La reprise des fibres à la périphérie du tambour de cardage est assurée par un ou plusieurs cylindres successifs, qui forment une sortie de carde, et qui d'une manière générale travaillent les fibres et ont pour fonction de former sur leur périphérie un voile non-tissé à partir de ces fibres. Dans la suite du présent texte, ces cylindres seront désignés généralement par « cylindres de formation d'un voile non-tissé».Usually in a conventional card structure, in during operation, with each rotation of the carding drum, a more or less small portion of the fibers at the periphery of the drum carding is resumed, at a point located downstream of the carding members, while the residual part of the fibers at the periphery of the drum carding is recycled by this carding drum to the organs carding. Resumption of fibers at the periphery of the carding drum is ensured by one or more successive cylinders, which form a out of card, and which generally work the fibers and have the function of forming on their periphery a non-woven veil with from these fibers. In the remainder of this text, these cylinders will generally designated by “cylinders for forming a non-woven veil”.

Plusieurs configurations de sortie de carde mettant en oeuvre un plusieurs cylindres successifs de formation d'un voile non-tissé sont connues à ce jour. A titre d'exemples non exhaustifs sont donnés ci-après les quatre configurations de sortie de carde les plus répandues.Several card output configurations implementing a several successive cylinders for forming a nonwoven veil are known to date. As non-exhaustive examples are given below the four most common card outlet configurations.

Une première configuration de sortie de carde connue, permettant la production d'un non-tissé parallèle, met en oeuvre en, guise de cylindres de formation du voile non-tissé, un ou plusieurs cylindres peigneurs successifs.A first known card output configuration, allowing the production of a parallel nonwoven, implements, as cylinders for forming the non-woven veil, one or more successive combing cylinders.

Une deuxième configuration de sortie de carde connue, permettant la production d'un non-tissé brouillé, met en oeuvre, en guise de cylindres de formation du voile non-tissé, un cylindre communément désigné « contre-tambour » suivi d'un cylindre peigneur.A second known card output configuration, allowing the production of a scrambled nonwoven, implements, in as cylinders for forming the nonwoven web, a cylinder commonly known as a "counter-drum" followed by a cylinder comber.

Une troisième configuration de sortie de carde connue, permettant la production d'un non-tissé condensé, met en oeuvre, en guise de cylindres de formation du voile non-tissé, un cylindre peigneur, suivi d'au moins un cylindre condenseur; la plupart du temps le cylindre peigneur est suivi de deux cylindres condenseurs successifs.A third known card output configuration, allowing the production of a condensed nonwoven, implements, in as cylinders for forming the nonwoven web, a cylinder comb, followed by at least one condensing cylinder; most of time the comb cylinder is followed by two condensing cylinders successive.

Une quatrième configuration de sortie de carde connue met en oeuvre, en guise de cylindres de formation du voile non-tissé, un cylindre contre-tambour suivi d'un cylindre peigneur et d'un cylindre condenseur.A fourth known card output configuration highlights work, by way of cylinders for forming the non-woven veil, a counter-drum cylinder followed by a painter cylinder and a cylinder condenser.

Dans les configurations de carde classiques précitées, le tambour de cardage joue un rôle à la fois dans la fonction d'individualisation des fibres (cardage des fibres par les organes cardants en coopération avec le tambour de cardage), et dans la formation du voile non-tissé en sortie de carde par les cylindres de formation de voile, à partir des fibres individualisées transportées la périphérie du tambour de cardage. Il en résulte que la vitesse de rotation du tambour de cardage est un paramètre de réglage qui conditionne de manière prépondérante à la fois la qualité de cardage des fibres à la périphérie du tambour de cardage par les organes cardants, et les propriétés mécaniques du non-tissé produit (isotropie, grammage,...).In the above-mentioned conventional carding configurations, the drum carding plays a role in both the function of individualization fibers (carding of fibers by carding organs in cooperation with the carding drum), and in the formation of the nonwoven web at the end of the card by the sail forming cylinders, from the individualized fibers transported around the drum carding. As a result, the speed of rotation of the carding drum is an adjustment parameter which conditions preponderant both the carding quality of the fibers at the periphery of the carding drum by the carding organs, and the properties mechanics of the nonwoven produced (isotropy, grammage, ...).

Le réglage de cette vitesse de rotation du tambour de cardage doit donc être effectué en sorte de respecter deux contraintes distinctes (qualité du cardage d'une part et obtention des propriétés mécaniques requises pour le non-tissé produit d'autre part), obligeant ainsi le concepteur de la carde à choisir un compromis dans ce réglage.Adjusting this speed of rotation of the carding drum must therefore be carried out in order to respect two constraints distinct (quality of carding on the one hand and obtaining properties required for the nonwoven produced on the other hand), requiring thus the designer of the card to choose a compromise in this adjustment.

En pratique, l'obtention de la qualité de cardage requise des fibres impose de régler la vitesse de rotation du tambour de cardage dans une plage de vitesses relativement étroite, et à partir de ce réglage de vitesse du tambour de cardage, le concepteur de la carde déduit les réglages de vitesse des cylindres de formation de voile, en sorte d'obtenir un non-tissé présentant les propriétés mécaniques requises (grammage, isotropie, ...).In practice, obtaining the required quality of carding fibers requires adjusting the speed of rotation of the carding drum in a relatively narrow speed range, and from that carding drum speed adjustment, card designer deduces the speed settings of the sail forming cylinders, kind of obtaining a nonwoven with mechanical properties required (grammage, isotropy, ...).

Etant donné que la plage de réglage de vitesses du tambour de cardage est étroite au regard de la fonction de cardage des fibres qui doit être assurée par ce tambour, le concepteur de la carde est en pratique restreint dans son choix pour les vitesses de rotation des cylindres de formation du voile non-tissé, et par là-même dans le réglage de la vitesse de production du non-tissé en sortie de carde. En outre, Il est difficile d'augmenter la vitesse de production du non-tissé en sortie de carde, sans détériorer de manière préjudiciable les propriétés mécaniques du voile.Since the speed setting range of the drum carding is narrow compared to the fiber carding function which must be provided by this drum, the card designer is in limited practice in its choice for the rotational speeds of the non-woven veil forming cylinders, and thereby in the adjustment of the production speed of the nonwoven at the card exit. In Besides, it is difficult to increase the production speed of the nonwoven at the end of the card, without damaging the mechanical properties of the web.

La présente invention vise à proposer une nouvelle structure de carde qui pallie l'inconvénient précité, en ce qu'elle offre une plus grande flexibilité dans le réglage de vitesse des cylindres de formation du non-tissé. Un autre but de l'invention est de pouvoir augmenter la vitesse de production de la carde, sans détériorer les propriétés mécaniques du non-tissé produit.The present invention aims to propose a new carding structure which overcomes the aforementioned drawback, in that it offers greater flexibility in adjusting the speed of the cylinders formation of nonwoven. Another object of the invention is to be able increase the production speed of the card, without damaging the mechanical properties of the nonwoven produced.

La carde de l'invention est connue en ce qu'elle comporte un tambour de cardage, des organes cardants montés à la périphérie du tambour de cardage et au moins une sortie de carde comprenant au moins un premier cylindre de formation d'un voile non-tissé.The card of the invention is known in that it comprises a carding drum, carding members mounted on the periphery of the carding drum and at least one carding outlet comprising at least minus a first cylinder for forming a nonwoven veil.

Selon une première caractéristique de l'invention, la carde comporte un cylindre transfert accumulateur entre le tambour de cardage et le premier cylindre de formation d'un voile non-tissé.According to a first characteristic of the invention, the card has an accumulator transfer cylinder between the drum carding and the first cylinder for forming a nonwoven web.

Le cylindre transfert accumulateur de la carde de l'invention a pour fonction de simplement reprendre les fibres transportées à la périphérie du tambour de cardage sans les travailler lors de leur transfert depuis le tambour de cardage, et d'alimenter en fibres le premier cylindre de formation de voile, en formant un tampon accumulateur entre le tambour de cardage et le premier cylindre de formation de voile, du fait du recyclage des fibres à la périphérie du cylindre de transfert.The accumulator transfer cylinder of the card of the invention has the function of simply taking up the fibers transported to the periphery of the carding drum without working them during their transfer from the carding drum, and supplying fibers to the first sail-forming cylinder, forming a tampon accumulator between the carding drum and the first cylinder of formation of haze, due to the recycling of fibers at the periphery of the transfer cylinder.

La fonction de reprise des fibres qui doit être assurée par le cylindre transfert accumulateur est peu contraignante en terme de réglage de vitesse de rotation de ce cylindre, et peut avantageusement être obtenue en réglant la vitesse de rotation du cylindre transfert accumulateur dans une plage de vitesses très large ; En pratique, il suffira que la vitesse de rotation du cylindre de transfert soit réglée de telle sorte que sa vitesse circonférentielle soit supérieure à la vitesse circonférentielle du tambour de cardage. Il devient ainsi facile de régler la vitesse de rotation de ce cylindre transfert dans cette plage très large, en sorte de réguler de manière optimale l'alimentation en fibres du premier cylindre de formation du voile non-tissé, et en sorte que cette vitesse soit adaptée aux caractéristiques de production souhaitées (vitesse de production, propriété mécaniques requises pour le non-tissé produit (grammage, isotropie,..). Ainsi, comparativement aux solutions traditionnelles précitées, ce cylindre transfert accumulateur permet avantageusement d'obtenir un meilleur découplage entre d'une part la fonction de cardage (individualisation des fibres par cardage entre le tambour de cardage les organes cardants de la carde) et la fonction de formation du voile non-tissé assurée par le ou les cylindres successifs en aval du cylindre transfert accumulateur.The fiber recovery function which must be ensured by the cylinder transfer accumulator is not very restrictive in terms of speed adjustment of this cylinder, and can advantageously be obtained by adjusting the speed of rotation of the accumulator transfer cylinder in a very wide speed range; In practice, it will suffice that the rotation speed of the cylinder transfer is set so that its circumferential speed is greater than the circumferential speed of the carding drum. he thus becomes easy to adjust the rotation speed of this cylinder transfer in this very wide range, so regulate so optimal fiber supply to the first forming cylinder of the fleece, and so that this speed is adapted to desired production characteristics (production speed, mechanical properties required for the nonwoven product (grammage, isotropic, ..). So compared to traditional solutions above, this accumulator transfer cylinder advantageously allows to obtain a better decoupling between on the one hand the function of carding (individualization of the fibers by carding between the drum carding the carding organs) and the training function non-woven veil provided by the successive cylinder or cylinders downstream of the accumulator transfer cylinder.

La présente invention a également pour autre objet un procédé de production d'un non-tissé au moyen d'une carde de l'invention. Selon ce procédé, à chaque rotation du tambour de cardage de la carde, on reprend au moyen du cylindre transfert accumulateur plus de 90%, et de préférence 100% des fibres transportées à la périphérie du tambour de cardage.Another subject of the present invention is also a method for producing a nonwoven using a card of the invention. According to this method, each rotation of the carding drum of the card, we resume using the accumulator transfer cylinder plus 90%, and preferably 100% of the fibers transported to the periphery carding drum.

D'autres caractéristiques et avantages de l'invention apparaítront plus clairement à la lecture de la description ci-après d'un exemple préféré de réalisation d'une carde de l'invention, laquelle description est donnée à titre d'exemple non limitatif et en référence aux dessins annexés sur lesquels :

  • la figure 1 représente schématiquement une ligne de production d'un non-tissé mettant en oeuvre une carde de l'invention à double sortie,
  • les figures 2 et 3 sont des vues de détail d'un exemple de dents de la garniture du cylindre transfert accumulateur de la carde de la figure 1,
  • et la figure 4 est une vue agrandie de la zone de transfert entre le tambour de cardage et le cylindre transfert accumulateur de la carde de la figure 1.
Other characteristics and advantages of the invention will appear more clearly on reading the description below of a preferred embodiment of a card of the invention, which description is given by way of non-limiting example and with reference to the attached drawings in which:
  • FIG. 1 schematically represents a production line for a nonwoven using a card of the invention with a double outlet,
  • FIGS. 2 and 3 are detailed views of an example of teeth of the lining of the accumulator transfer cylinder of the card of FIG. 1,
  • and FIG. 4 is an enlarged view of the transfer zone between the carding drum and the accumulator transfer cylinder of the card of FIG. 1.

La ligne de production représentée sur la figure 1 permet la fabrication en parallèle de deux voiles non-tissés W1 et W2, qui sont déposés et transportés sur deux bandes de transport B. A un stade ultérieur de la fabrication, ces deux non-tissés W1 et W2 sont soit consolidés séparément par tout moyen de consolidation connu, ou sont par exemple superposés en sorte de former un non-tissé plus épais, qui est ultérieurement consolidé.The production line shown in Figure 1 allows the parallel production of two nonwoven webs W1 and W2, which are deposited and transported on two transport belts B. At one stage subsequent to manufacture, these two nonwovens W1 and W2 are either separately consolidated by any known means of consolidation, or are for example superimposed so as to form a nonwoven more thick, which is subsequently consolidated.

Cette ligne de production de la figure 1 comprend une chargeuse-peseuse 1 traditionnelle qui alimente, par l'intermédiaire d'un convoyeur 2, une carde 3 à double sortie.This production line in Figure 1 includes a traditional 1 loader-loader that feeds, via a conveyor 2, a card 3 with double outlet.

La carde 3 comprend une entrée de carde traditionnelle, constituée par une auge 3a, un rouleau alimentaire 3b et un cylindre briseur 3c. Le cylindre briseur 3c alimente un premier cylindre de cardage 3d rotatif, qui est communément appelé avant-train, et dont la surface est revêtue de manière usuelle d'une garniture de carde ou de tout autre moyen équivalent lui permettant de reprendre les fibres de la périphérie du cylindre briseur 3c. De manière usuelle, l'avant-train 3d est en outre pourvu sur sa périphérie de plusieurs organes cardants, qui permettent de travailler les fibres prises dans la garniture de la carde de ce cylindre 3d, en sorte de les individualiser. Dans l'exemple particulier illustré, ces organes cardants sont constitués par plusieurs paires successives d'un rouleau balayeur 3e et d'un rouleau travailleur 3f. En aval de ces organes cardants, les fibres sont reprises de la périphérie du premier cylindre de cardage 3d, et transférées en l'état à un second cylindre de cardage 3h rotatif, par un cylindre de transfert 3g, encore communément appelé « communicateur ».Card 3 includes a traditional card entry, constituted by a trough 3a, a food roller 3b and a cylinder breaker 3c. The breaker cylinder 3c supplies a first cylinder of rotary 3d carding, which is commonly known as a front end, and whose the surface is usually coated with a card lining or any other equivalent means allowing it to take up the fibers from the periphery of the breaker cylinder 3c. Usually, the front end 3d is also provided on its periphery with several organs cardants, which allow the fibers caught in the filling to be worked of the card of this 3d cylinder, so as to individualize them. In the particular example illustrated, these carding members are constituted by several successive pairs of a 3e sweep roller and a roller worker 3f. Downstream of these carding organs, the fibers are taken up from the periphery of the first carding cylinder 3d, and transferred to the state to a second 3h rotary carding cylinder, by a cylinder of 3g transfer, also commonly called "communicator".

Le second cylindre de cardage 3h, encore communément appelé « grand tambour » ou « tambour principal » sera désigné dans la suite de la présente description par les termes « tambour de cardage ». Ce tambour de cardage 3h est de manière usuelle revêtu sur sa périphérie d'une garniture de carde lui permettant de reprendre les fibres à la périphérie du communicateur 3g. Egalement, ce tambour de cardage 3h est équipé sur sa périphérie d'organes cardants (3e, 3f) identiques à ceux équipant le premier cylindre de cardage 3d.The second 3h carding cylinder, also commonly known as "Large drum" or "main drum" will be designated in the following of the present description by the terms "carding drum". This carding drum 3h is usually coated on its periphery a card lining allowing it to take up the fibers at the periphery of the communicator 3g. Also, this carding drum 3h is equipped on its periphery with carding organs (3e, 3f) identical to those fitted to the first 3d carding cylinder.

L'invention n'est pas limitée à une carde ayant la configuration particulière de la carde 3 à deux cylindres de cardage de la figure 1. En particulier, en fonction du type de fibres à ouvrir, et du degré d'ouverture souhaité de ces fibres, on peut envisager d'utiliser une carde plus longue mettant en oeuvre au moins trois cylindres de cardage de successifs, ou au contraire une carde plus courte mettant en oeuvre un unique cylindre de cardage. Par ailleurs, les rouleaux 3e et 3f pourraient être disposés en étant juxtaposés les uns derrière les autres de manière alternée, selon une configuration communément appelée «Garnett ». Les rouleaux balayeurs et travailleurs (3e, 3f) à la périphérie de chaque cylindre de cardage pourraient en outre être remplacés par tout moyen de structure différente, mais remplissant la même fonction, c'est-à-dire ayant pour fonction, en combinaison avec le cylindre de cardage, d'individualiser les fibres sur la périphérie du cylindre de cardage. En particulier, ces rouleaux pourraient être remplacés par des plaques statiques, communément appelées « plaques cardantes » montées à la périphérie du cylindre de cardage et comportant une pluralité de points cardants fixes sous la forme par exemple de rainures ou cannelures.The invention is not limited to a card having the configuration particular of card 3 with two carding cylinders of FIG. 1. In particular, depending on the type of fibers to be opened, and the degree opening of these fibers, we can consider using a longer card using at least three cylinders carding of successive, or on the contrary a shorter card putting using a single carding cylinder. In addition, the 3rd rollers and 3f could be arranged by being juxtaposed one behind the other. others alternately, according to a configuration commonly called "Garnett". The sweeper and worker rollers (3e, 3f) at the the periphery of each carding cylinder could furthermore be replaced by any means of different structure, but fulfilling the same function, i.e. having function, in combination with the carding cylinder, to individualize the fibers on the periphery of the carding cylinder. In particular, these rollers could be replaced by static plates, commonly called "Carding plates" mounted on the periphery of the carding cylinder and comprising a plurality of fixed carding points in the form of example of grooves or grooves.

La carde 3 de la figure 1 comporte deux sorties respectivement supérieure et inférieure, chaque sortie comportant de manière usuelle des cylindres de formation de voiles 3j, 3k. Dans l'exemple préféré de réalisation illustré, le premier cylindre de formation de voile 3j, est un cylindre peigneur; le second cylindre de formation de voile 3k est un cylindre condenseur. Ces deux cylindres permettent de manière usuelle de former un voile non-tissé condensé, à partir des fibres qui sont acheminées jusqu'à la périphérie du cylindre peigneur 3j. Chaque non-tissé (W1, W2) est détaché de la périphérie du cylindre condenseur 3k par un dispositif détacheur, conforme au dispositif décrit dans la demande de brevet européen EP-A-0 704 561. Ce dispositif détacheur comprend essentiellement un cylindre détacheur 31, qui permet de détacher le fibre de la périphérie du cylindre condenseur 3k et de le déposer sur la bande transporteuse B. Cette bande transporteuse est perméable à l'air, et une boíte d'aspiration S est prévue au niveau de la zone de détachage, en sorte de plaquer par aspiration le non-tissé à la surface de la bande de transport B. Sur la figure 1, l'élément supplémentaire 3m est une brosse rotative.Card 3 in Figure 1 has two outputs respectively upper and lower, each outlet comprising in the usual manner sails forming cylinders 3j, 3k. In the preferred example of illustrated embodiment, the first sail forming cylinder 3j, is a comb cylinder; the second 3k sail forming cylinder is a condensing cylinder. These two cylinders are used in the usual way to form a condensed nonwoven web, from the fibers which are routed to the periphery of the comb cylinder 3j. Each nonwoven (W1, W2) is detached from the periphery of the 3k condenser cylinder by a detaching device, conforming to the device described in the European patent application EP-A-0 704 561. This detaching device essentially comprises a detaching cylinder 31, which allows detach the fiber from the periphery of the 3k condenser cylinder and place on conveyor belt B. This conveyor belt is breathable, and a suction box S is provided at the stain removal area, so as to press the nonwoven by suction to the surface of the conveyor belt B. In FIG. 1, the element additional 3m is a rotating brush.

Dans une configuration de carde classique, le premier cylindre de formation de voile non-tissé, tel que le cylindre peigneur 3j, est monté directement à la périphérie du tambour de cardage 3h. Cette disposition rend difficile et contraignante le réglage de vitesse du cylindre du tambour de cardage 3h et des cylindres de formation de voile. En effet, la vitesse de rotation du tambour de cardage 3h doit être réglée de manière à permettre à la fois un cardage efficace avec des organes cardants 3e et 3f, et à permettre un peignage efficace des fibres lors de leur transfert entre le cylindre 3h et le premier cylindre de formation de voile 3j.In a classic card configuration, the first cylinder for forming a non-woven veil, such as the comb cylinder 3j, is mounted directly on the periphery of the carding drum 3h. This provision makes it difficult and restrictive to adjust the speed of the 3h carding drum cylinder and forming cylinders sail. Indeed, the speed of rotation of the carding drum 3h must be set to allow both efficient carding with carding organs 3e and 3f, and to allow effective combing of fibers during their transfer between the 3h cylinder and the first cylinder sail training 3d.

Egalement, lorsque le cylindre peigneur 3j est juxtaposé au tambour de cardage 3h, pour utiliser un dispositif détacheur du type de celui de la figure 1 avec cylindre détacheur 31 et bande transporteuse B, on était jusqu'à présent contraint en pratique d'utiliser successivement deux cylindres condenseurs 3k au lieu d'un unique cylindre dans la configuration de l'invention. Or, la mise en oeuvre de deux cylindres condenseurs successifs présente l'inconvénient de provoquer un laminage du non-tissé entre les deux cylindres condenseurs, ce laminage étant de manière préjudiciable source de phénomènes de bulles et d'encrassement des condenseurs.Also, when the comb cylinder 3j is juxtaposed with the carding drum 3h, to use a detaching device of the type of that of FIG. 1 with detaching cylinder 31 and strip conveyor B, we were until now constrained in practice successively use two 3k condenser cylinders instead of one single cylinder in the configuration of the invention. However, the implementation work of two successive condenser cylinders present the disadvantage of causing the nonwoven to laminate between the two condensing cylinders, this rolling being detrimentally source of bubble phenomena and fouling of condensers.

En référence à la figure 1, conformément à l'invention, le premier cylindre de formation de voile 3j n'est plus disposé à la périphérie du tambour de cardage 3h, mais la carde 3 comporte un cylindre de transfert accumulateur 3i entre le tambour de cardage 3h et chaque premier cylindre de formation 3j d'un voile non-tissé. Dans l'exemple de réalisation illustré, ce cylindre transfert accumulateur 3i est adjacent à chaque premier cylindre de formation de voile 3j de chacune des deux sorties.Referring to Figure 1, in accordance with the invention, the first sail forming cylinder 3j is no longer disposed at the periphery of the carding drum 3h, but card 3 has a accumulator transfer cylinder 3i between the carding drum 3h and each first training cylinder 3j of a nonwoven veil. In the exemplary embodiment illustrated, this accumulator transfer cylinder 3i is adjacent to each first 3j sail forming cylinder of each of the two outputs.

Ce cylindre transfert accumulateur 3i a d'une manière générale pour fonction de reprendre les fibres à la périphérie du tambour de cardage 3h, et de les transférer en l'état, sans leur faire subir un travail particulier, par contraste par exemple avec la réorientation des fibres qui est réalisée par un cylindre de formation de voile tel qu'un cylindre peigneur 3j ou un cylindre condenseur 3k. Ce cylindre transfert 3i joue donc, d'une part un rôle de simple communicateur vis-à-vis du tambour de cardage 3h, et d'autre part remplit une fonction de distribution des fibres et de régulation du débit d'alimentation de ces fibres vis-à-vis de chaque premier cylindre de formation de voile 3j.This accumulator transfer cylinder 3i generally has function of taking up the fibers at the periphery of the drum carding 3h, and to transfer them in the state, without making them undergo a work particular, in contrast for example with the reorientation of the fibers which is produced by a sail forming cylinder such as a cylinder comber 3j or a condenser cylinder 3k. This 3i transfer cylinder plays therefore, on the one hand, a role of simple communicator vis-à-vis the carding drum 3h, and on the other hand performs a function of fiber distribution and regulating the feed rate of these fibers vis-à-vis each first veil forming cylinder 3j.

Afin d'assurer ces fonctions, le cylindre transfert accumulateur 3i est équipé sur sa périphérie d'une garniture métallique G, dont un exemple de réalisation est illustré sur les figures 2 et 3. Cette garniture G est composée d'une pluralité de dents 4. Sur la figue 2, la double flèche L représente la direction parallèle à l'axe longitudinal du cylindre de transfert accumulateur 3i, c'est-à-dire la direction orthogonale au plan de la figure 1. La figure 3 est une vue en coupe de la garniture du cylindre transfert accumulateur 3i selon un plan transversal à l'axe longitudinal du cylindre de transfert accumulateur 3i. En référence à la figure 2, les dents 4 de la garniture G sont alignées sous la forme de rangées adjacentes parallèles à l'axe longitudinal du cylindre transfert accumulateur 3i ; sur la figure 2, seules deux rangées adjacentes de dents 4 ont été représentées. En référence à la figure 3, chaque dent 4 de la garniture G est inclinée par rapport au rayon du cylindre transfert accumulateur 3i selon un angle A et est orientée dans le sens de rotation dudit cylindre (vitesse circonférentielle V2).In order to perform these functions, the accumulator transfer cylinder 3i is equipped on its periphery with a metal trim G, one of which exemplary embodiment is illustrated in FIGS. 2 and 3. This gasket G is made up of a plurality of teeth 4. In fig 2, the double arrow L represents the direction parallel to the longitudinal axis of the accumulator transfer cylinder 3i, i.e. the direction orthogonal to the plane of Figure 1. Figure 3 is a sectional view of the lining of the accumulator transfer cylinder 3i according to a plan transverse to the longitudinal axis of the accumulator transfer cylinder 3i. With reference to FIG. 2, the teeth 4 of the lining G are aligned as adjacent rows parallel to the axis longitudinal of the accumulator transfer cylinder 3i; in figure 2, only two adjacent rows of teeth 4 have been shown. In reference to FIG. 3, each tooth 4 of the lining G is inclined with respect to the radius of the accumulator transfer cylinder 3i according to a angle A and is oriented in the direction of rotation of said cylinder (speed circumferential V2).

Sur la figure 4, les dents 4 de la garniture G du cylindre transfert ont été représentées de manière très schématique en sorte de faire principalement apparaítre leur inclinaison et leur orientation précitées. Egalement en référence à cette figure 4, le tambour de cardage 3h est de manière connue équipée d'une garniture de carde G' qui est usuelle, et dont les dents 4' sont inclinées par rapport au rayon du tambour de cardage 3h, et sont orientées dans le sens de rotation du tambour de cardage 3h.In FIG. 4, the teeth 4 of the lining G of the transfer cylinder were represented very schematically so to do mainly appear their inclination and their orientation above. Also with reference to this FIG. 4, the drum of 3h carding is in known manner equipped with a card lining G 'which is usual, and whose teeth 4' are inclined relative to the radius of the carding drum 3h, and are oriented in the direction of rotation of the carding drum 3h.

En référence aux figures 1 et 4, lorsque la carde 3 fonctionne, le cylindre transfert accumulateur 3i est entraíné dans un sens de rotation qui est opposé au sens de rotation du tambour de cardage 3h. Plus particulièrement, la vitesse de rotation du tambour transfert accumulateur 3i est réglée de telle sorte que sa vitesse circonférentielle V2 (figure 4) est supérieure à la vitesse circonférentielle V1 du tambour de cardage 3h. En fonctionnement de la carde, les fibres qui sont transportées à la périphérie du tambour de cardage 3h, après avoir été individualisées par l'action des organes cardants 3e, 3f, sont reprises dans la garniture G du tambour transfert accumulateur 3i. Lors de son transfert entre le tambour de cardage 3h et le cylindre transfert accumulateur 3i, chaque fibre est reprise par les dents 4 de la garniture G du cylindre transfert 3i, sans être retenue par les dents 4' de la garniture G' du tambour de cardage 3h. Il en résulte que les fibres sont transférées en l'état, sans être travaillées, contrairement à ce qui se produit dans une structure de carde classique, lorsque les fibres sont prélevées à la périphérie du tambour de cardage par un cylindre de formation de voile du type cylindre peigneur ou cylindre contre-tambour.With reference to FIGS. 1 and 4, when the card 3 is operating, the accumulator transfer cylinder 3i is driven in a direction of rotation which is opposite to the direction of rotation of the carding drum 3h. More particularly, the rotation speed of the transfer drum 3i accumulator is adjusted so that its speed circumferential V2 (figure 4) is greater than the speed circumferential V1 of the carding drum 3h. In operation of the card, the fibers which are transported to the periphery of the drum carding 3h, after having been individualized by the action of the organs cardants 3e, 3f, are taken up in the lining G of the transfer drum accumulator 3i. During its transfer between the carding drum 3h and the accumulator transfer cylinder 3i, each fiber is taken up by the teeth 4 of the lining G of the transfer cylinder 3i, without being retained by the teeth 4 'of the lining G' of the carding drum 3h. The result that the fibers are transferred as is, without being processed, unlike what happens in a carding structure conventional, when the fibers are taken from the periphery of the drum carding by a cylinder-type sail forming cylinder comber or counter-drum cylinder.

Selon une autre caractéristique de l'invention, à chaque rotation du tambour transfert 3h, on cherche à faire reprendre par le tambour transfert accumulateur 3i le maximum de fibres (au moins 90%) transportées par le tambour de cardage, et de préférence 100% de ces fibres. A cet effet on règle judicieusement la vitesse circonférentielle V2 du cylindre transfert accumulateur 3i par rapport à la vitesse circonférentielle V1 du tambour de cardage 3h. A cet effet, en pratique, il est préférable que le ratio de vitesse (V2/V1) soit supérieur ou égal à 1,2, et de préférence supérieur ou égal à 1,3.According to another characteristic of the invention, at each rotation of the transfer drum 3h, we are trying to have the drum transfer accumulator 3i the maximum of fibers (at least 90%) transported by the carding drum, and preferably 100% of these fibers. For this purpose the speed is judiciously adjusted circumferential V2 of the accumulator transfer cylinder 3i with respect to at the circumferential speed V1 of the carding drum 3h. In this Indeed, in practice, it is preferable that the speed ratio (V2 / V1) is greater than or equal to 1.2, and preferably greater than or equal to 1.3.

Ainsi, et contrairement à ce qui était traditionnellement recherché dans une carde classique, il n'y a plus de recyclage des fibres à la périphérie du tambour de cardage 3h, l'intégralité ou la quasi-intégralité des fibres après cardage étant reprise par le tambour transfert accumulateur 3i.So, and contrary to what was traditionally sought in a classic card, there is no more recycling of fibers at the periphery of the 3h carding drum, all or almost all fibers after carding being taken up by the drum accumulator transfer 3i.

Jusqu'à ce jour, il y avait un préjugé à considérer qu'il était préférable, sinon indispensable qu'un recyclage des fibres à la périphérie du tambour de cardage 3h ait lieu. On supposait en effet jusqu'à ce jour que ce recyclage permettait à une fibre d'être avantageusement cardée plusieurs fois. Or la demanderesse a pu constater tout d'abord, qu'en pratique dans une carde traditionnelle, sont recyclées les fibres qui sont emprisonnées dans la garniture du tambour de cardage, et les fibres situées sur la périphérie extérieure de cette garniture ont tendance en majorité à être reprises directement par les cylindres de formation de voiles, après un premier et unique passage entre les organes cardants. Ce phénomène est d'autant plus prépondérant que la vitesse de travail de la carde est importante. En d'autres termes, après que la garniture du tambour de cardage 3h soit remplie de fibres, les nouvelles fibres introduites à l'entrée du tambour de cardage ne sont pas recyclées par ce tambour et quittent le tambour de cardage directement après un seul et unique passage entre les organes cardants. En conséquence, la demanderesse a pu mettre en évidence que ce recyclage n'est en pratique pas nécessaire.Up to this day, there was a prejudice to consider that it was preferable, if not essential, that recycling fibers to the periphery of the carding drum 3h takes place. We supposed indeed until this day that this recycling allowed a fiber to be advantageously carded several times. The plaintiff was able first of all, that in practice in a traditional card, are recycled the fibers which are trapped in the lining of the carding drum, and the fibers located on the outer periphery of this garnish tend to be taken over directly by the sail forming cylinders, after a first and single passage between the carding organs. This phenomenon is all the more preponderant as the working speed of the carding machine is important. In other words, after the drum lining carding 3h is filled with fibers, the new fibers introduced to the entry of the carding drum is not recycled by this drum and leave the carding drum directly after a single passage between the carding organs. Consequently, the plaintiff was able to demonstrate that this recycling is in practice not necessary.

D'autre part, dans la carde de l'invention, l'absence de recyclage des fibres à la périphérie du tambour de cardage 3h, permet avantageusement d'éviter un remplissage de la garniture de carde du tambour de cardage 3h. Ainsi, les nouvelles fibres qui sont présentées à l'entrée du tambour de cardage 3h par le cylindre communicateur 3g, sont reprises par une garniture vide, au lieu d'une garniture remplie dans la solution traditionnelle. Les dents de la garniture de cardage du tambour 3h permettent ainsi d'obtenir un meilleur effet de cardage en coopération avec les organes cardants périphériques 3f, 3e, et par là-même un meilleur cardage des fibres transportées à la périphérie du tambour 3h.On the other hand, in the card of the invention, the absence of recycling fibers at the periphery of the 3h carding drum, allows advantageously to avoid filling the card lining of the carding drum 3h. So the new fibers that are introduced at the entry of the carding drum 3h by the communicating cylinder 3g, are taken up by an empty filling, instead of a filling filled in the traditional solution. The teeth of the trim carding the drum for 3 hours thus provides a better effect carding in cooperation with the peripheral carding members 3f, 3rd, and thereby better carding of the fibers transported to the periphery of the drum 3h.

Selon un autre avantage de l'invention, le réglage de la vitesse de rotation du tambour de cardage 3h peut être fait de manière quasi indépendante par rapport aux vitesses de rotation des cylindres de formation de voiles 3j, 3k. Dans le cadre de l'invention, la vitesse de rotation du tambour de cardage 3h est réglée en se préoccupant uniquement de la qualité de cardage des fibres entre ce tambour et les organes cardants 3f, 3e. Une fois la vitesse de rotation du tambour de cardage 3h effectuée, on règle la vitesse de rotation du tambour transfert accumulateur 3i, en sorte de répondre au critère de vitesse précité, qui est peu contraignant (vitesse circonférentielle V2 du cylindre transfert accumulateur 3i supérieure à la vitesse circonférentielle V1 du tambour de cardage 3h). Les vitesses de rotation respectives des cylindres de formation de voile 3j et 3k seront réglées en sorte d'obtenir le travail recherché pour les fibres. En pratique, la vitesse de rotation du cylindre peigneur 3j sera réglée de telle sorte que sa vitesse circonférentielle est inférieure à la vitesse circonférentielle du tambour transfert accumulateur 3i. De préférence, la vitesse circonférentielle du cylindre peigneur 3j est inférieure ou égale à 25 % de la vitesse circonférentielle du tambour transfert accumulateur 3i. La vitesse de rotation du cylindre condenseur 3k sera choisie de telle sorte que sa vitesse circonférentielle est inférieure à environ 80% de la vitesse circonférentielle du cylindre peigneur 3j.According to another advantage of the invention, the speed adjustment rotation of the carding drum 3h can be done almost independent with respect to the rotational speeds of the cylinders formation of sails 3d, 3k. In the context of the invention, the speed of 3h carding drum rotation is set with concern only the carding quality of the fibers between this drum and the carding organs 3f, 3e. Once the drum rotation speed carding done for 3h, the speed of rotation of the drum is adjusted 3i accumulator transfer, so as to meet the speed criterion above, which is not very restrictive (circumferential speed V2 of the accumulator transfer cylinder 3i higher than speed circumference V1 of the carding drum 3h). The speeds of respective rotation of the sail forming cylinders 3j and 3k will adjusted so as to obtain the desired work for the fibers. In practical, the rotational speed of the 3j combing cylinder will be adjusted from so that its circumferential speed is less than the speed circumferential of the accumulator transfer drum 3i. Preferably, the circumferential speed of the comb cylinder 3j is lower or equal to 25% of the circumferential speed of the transfer drum accumulator 3i. The speed of rotation of the condenser cylinder 3k will be chosen so that its circumferential speed is less than approximately 80% of the circumferential speed of the comb cylinder 3j.

En fonctionnement, les fibres qui sont reprises à la périphérie du tambour transfert accumulateur 3i sont transportées par ce tambour jusqu'aux deux cylindres peigneurs 3j. Chaque cylindre peigneur 3j prélève une partie de ces fibres, l'autre partie étant recyclée à la périphérie du tambour transfert accumulateur 3i. Afin d'éviter un envol de ces fibres transportées à la périphérie du cylindre transfert accumulateur 3i, ce cylindre est de préférence équipé sur sa périphérie de carénages C1, C2 et C3 (figure 1).In operation, the fibers which are taken up at the periphery of the accumulator transfer drum 3i are transported by this drum to two combing cylinders 3j. Each cylinder 3j comber takes part of these fibers, the other part being recycled to the periphery of the accumulator transfer drum 3i. To avoid a flight of these fibers transported to the periphery of the cylinder accumulator transfer 3i, this cylinder is preferably fitted on its periphery of fairings C1, C2 and C3 (Figure 1).

Selon une caractéristique additionnelle de l'invention, la carde 3 comporte un ou plusieurs organes cardants, qui sont montés à la périphérie du cylindre transfert accumulateur 3i. Par exemple, en référence à la figure 1, le carénage C1 est remplacé par une ou plusieurs plaques cardantes, qui en fonctionnement de la carde permettent de travailler les fibres transportées à la périphérie du cylindre transfert accumulateur 3i. On obtient ainsi un démêlage additionnel de ces fibres, ce qui permet avantageusement d'obtenir en sortie de carde un non-tissé de meilleure qualité, et notamment un non-tissé plus régulier. Dans une autre variante, les plaques cardantes pourraient être remplacées par tout organe cardant assurant la même fonction, et par exemple par une ou plusieurs paires de rouleaux travailleur et balayeur. De préférence, ces organes cardants additionnels sont positionnés dans une région située en amont de la zone de transfert fibres (dans le cas d'une carde à sortie unique) ou en amont des zones de transfert de fibres (dans le cas d'une carde comportant plusieurs sorties) entre le cylindre transfert accumulateur 3i et chaque premier cylindre 3j de formation d'un voile non-tissé. Dans l'exemple particulier de la figure 1, cette région préférentielle de positionnement des organes cardants correspond à la zone de la périphérie du tambour transfert accumulateur 3i qui est occupée par le carénage C1, et qui s'étend entre le tambour de cardage 3h et le cylindre peigneur 3j inférieur.According to an additional characteristic of the invention, the card 3 comprises one or more carding members, which are mounted at the periphery of the accumulator transfer cylinder 3i. For example, reference to FIG. 1, the fairing C1 is replaced by one or several carding plates, which in operation of the card allow the fibers transported to the periphery of the accumulator transfer cylinder 3i. We thus obtain a disentangling additional of these fibers, which advantageously makes it possible to obtain better quality nonwoven, especially a more regular nonwoven. In another variant, the carding plates could be replaced by any carding device ensuring the same function, for example by one or more pairs of rollers worker and sweeper. Preferably, these carding organs are positioned in a region upstream of the fiber transfer area (in the case of a single output card) or upstream of the fiber transfer zones (in the case of a card with several outlets) between the accumulator transfer cylinder 3i and each first cylinder 3j for forming a nonwoven web. In the particular example of FIG. 1, this preferential region of positioning of the carding organs corresponds to the area of the periphery of the accumulator transfer drum 3i which is occupied by the fairing C1, and which extends between the carding drum 3h and the comb cylinder lower 3d.

En référence à la figure 1, il apparaít que le diamètre d du tambour transfert 3i est inférieur au diamètre D du tambour de cardage 3h. Il en résulte avantageusement que dans la carde de l'invention, les fibres qui sont recyclées à la périphérie du tambour transfert accumulateur 3i sont présentées de manière plus fréquente aux deux cylindres peigneurs 3j. Ainsi, s'il existe un défaut périodique sur le tambour de transfert accumulateur, cette fréquence plus élevée de recyclage des fibres, permet de générer dans le non-tissé produit des défauts périodiques qui sont plus difficilement perceptibles.Referring to Figure 1, it appears that the diameter d of the transfer drum 3i is less than the diameter D of the carding drum 3h. It advantageously follows that in the card of the invention, the fibers which are recycled to the periphery of the accumulator transfer drum 3i are presented more frequently to the two combing rollers 3j. Thus, if there is a periodic defect on the accumulator transfer drum, this higher frequency of recycling of the fibers makes it possible to generate in the nonwoven product periodic defects which are more difficult to perceive.

Selon un autre avantage de l'invention, dans la configuration préférée illustrée sur la figure 1, chaque peigneur 3j collecte avantageusement les fibres par le dessus, ce qui permet à la gravité d'agir dans le bon sens sur les peigneurs. En outre, il est avantageusement possible de n'utiliser qu'un unique cylindre condenseur 3k après le cylindre peigneur 3j, le non-tissé formé à la périphérie du cylindre condenseur se présentant correctement pour pouvoir être détaché par le cylindre détacheur 3I et être déposé sur la bande transporteuse B.According to another advantage of the invention, in the configuration preferred illustrated in FIG. 1, each 3j comber collects advantageously the fibers from above, which allows gravity to act in a good way on the combers. In addition, it is advantageously possible to use only a single cylinder condenser 3k after the comb cylinder 3j, the nonwoven formed at the periphery of the condensing cylinder presenting itself correctly for be able to be detached by the detaching cylinder 3I and be deposited on the conveyor belt B.

A la lumière de la description qui vient d'être faite de la carde 3, on comprend que le tambour de transfert 3i de l'invention permet avantageusement un meilleur découplage entre d'une part la fonction de cardage de la carde, et d'autre part la fonction de formation d'un non-tissé, et par là-même une meilleure indépendance dans le réglage des vitesses des éléments assurant ces deux fonctions. La vitesse de rotation du tambour de cardage 3h sera réglée en sorte d'optimiser l'opération de cardage des fibres par les organes cardants 3e, 3f ; la vitesse de rotation du cylindre transfert accumulateur 3i sera réglée en sorte de régler le débit d'alimentation des fibres à l'entrée de chaque premier cylindre de formation de voile, et en sorte d'obtenir également la vitesse de production recherchée pour le voile en sortie de carde, tout en étant réglée à une vitesse suffisante pour que ce cylindre transfert accumulateur puisse reprendre les fibres à la périphérie du tambour de cardage ; la vitesse de rotation des cylindres de formation de voile sera réglée en sorte d'optimiser le travail effectué sur les fibres par ces cylindres, et par là-même d'optimiser la qualité du non-tissé produit (isotropie, poids,...).In light of the description which has just been made of card 3, it is understood that the transfer drum 3i of the invention allows advantageously a better decoupling between on the one hand the function carding card, and on the other hand the function of forming a non-woven, and thereby better independence in the setting velocities of the elements ensuring these two functions. The speed of rotation of the carding drum 3h will be adjusted so as to optimize the carding operation of the fibers by the carding organs 3e, 3f; the rotation speed of the accumulator transfer cylinder 3i will be set in sort of regulating the fiber feed rate at the inlet of each first sail forming cylinder, and sort of get also the production speed sought for the veil at exit while being set at a speed sufficient for this accumulator transfer cylinder can pick up the fibers at the periphery of the carding drum; the rotation speed of the cylinders sail training will be set to optimize the work performed on the fibers by these cylinders, and thereby optimize the quality of the nonwoven produced (isotropy, weight, etc.).

Dans un exemple précis de réalisation donné à titre purement indicatif, la carde 3 était utilisé pour fabriquer en parallèle deux non-tissés condensés W1 et W2 à partir de fibres en polypropylène, de longueur d'environ 40 mm, et de titrage valant environ 2,2 dtex. Le diamètre D du tambour de cardage 3h valait 1500 mm ; le diamètre d du tambour transfert accumulateur 3i valait 700 mm ; la vitesse de rotation du tambour de cardage 3h valait environ 212 t/mn, ce qui correspondait à une vitesse circonférentielle V1 d'environ 1000 m/min ; la vitesse de rotation du tambour transfert accumulateur 3i valait environ 590 t/min, ce qui correspondait à une vitesse circonférentielle V2 d'environ 1300 t/min; la vitesse de rotation de chaque cylindre peigneur 3j valait environ 91 t/min, ce qui correspondait à une vitesse circonférentielle d'environ 200 m/min ; la vitesse de rotation de chaque cylindre condenseur 3k valait 162 t/min, ce qui correspondait à une vitesse circonférentielle d'environ 150 m/min. En référence aux figures 2 et 3, l'angle (A) des dents 4 de la garniture G du cylindre transfert accumulateur 3i valait environ 30° ; la hauteur (H) de chaque dent 4 valait 3,1mm ; le pas (p) entre deux rangées de dents 4 valait 1,6mm ; la distance (e) séparant deux dents 4 adjacentes d'une même rangée valait 3,3mm.In a specific example given purely by way of indication, card 3 was used to manufacture in parallel two condensed nonwovens W1 and W2 from polypropylene fibers, of length approximately 40 mm, and of titration being worth approximately 2 , 2 dtex. The diameter D of the carding drum 3h was worth 1500 mm; the diameter d of the accumulator transfer drum 3i was 700 mm; the speed of rotation of the carding drum 3 h was worth approximately 212 rpm, which corresponded to a circumferential speed V1 of approximately 1000 m / min; the rotation speed of the accumulator transfer drum 3i was approximately 590 rpm, which corresponded to a circumferential speed V2 of approximately 1300 rpm; the speed of rotation of each comb cylinder 3j was approximately 91 rpm, which corresponded to a circumferential speed of approximately 200 m / min; the speed of rotation of each condenser cylinder 3k was equal to 162 rpm, which corresponded to a circumferential speed of approximately 150 m / min. Referring to Figures 2 and 3, the angle (A) of the teeth 4 of the lining G of the accumulator transfer cylinder 3i was approximately 30 °; the height (H) of each tooth 4 was 3.1 mm; the pitch (p) between two rows of teeth 4 was 1.6mm; the distance (e) separating two adjacent teeth 4 of the same row was 3.3 mm.

L'invention n'est pas limitée à une carde à double sortie, mais peut bien entendu s'appliquer à des cardes comportant une unique sortie, ou à des cardes comportant plus de deux sorties. Egalement, l'invention n'est pas limitée à une sortie dont les cylindres de formation de voiles sont constitués par un cylindre peigneur suivi d'un cylindre condenseur, mais peut être mis en oeuvre avec tout type connu de cylindre de formation de voile. En particulier, on pourra réaliser une carde dont le ou les cylindres de formation d'un voile non-tissé sont uniquement des cylindres peigneurs. Egalement, on pourra envisager de réaliser une carde dont le premier cylindre de formation de voile n'est pas un cylindre peigneur mais par exemple un cylindre contre-tambour. Plus particulièrement, on pourra par exemple réaliser une carde selon l'invention, dont une sortie est constituée par un cylindre contre-tambour suivi d'un cylindre peigneur, ou encore une carde dont une sortie est formée par un cylindre contre-tambour, suivi d'un cylindre peigneur et d'un cylindre condenseur, dans les deux cas, le cylindre contre-tambour étant adjacent au tambour transfert accumulateur 3i de l'invention.The invention is not limited to a double outlet card, but can of course be applied to cards comprising a single output, or to cards with more than two outputs. Also, the invention is not limited to an outlet whose cylinders sails are formed by a comb cylinder followed by a condensing cylinder, but can be used with any type known of sail forming cylinder. In particular, we can make a card with one or more cylinders for forming a nonwoven web are only combing cylinders. Also, we can consider making a card with the first training cylinder of veil is not a painter cylinder but for example a cylinder against revolving. More particularly, we could for example carry out a card according to the invention, an outlet of which is constituted by a counter drum followed by a comb cylinder, or a carder whose outlet is formed by a counter-drum cylinder, followed a comb cylinder and a condenser cylinder, in both cases, the counter-drum cylinder being adjacent to the transfer drum accumulator 3i of the invention.

Claims (12)

Carde comportant un tambour de cardage (3h), des organes cardants (3e, 3f) montés à la périphérie du tambour de cardage, et au moins une sortie de carde comprenant au moins un premier cylindre (3j) de formation d'un voile non-tissé (W1), caractérisée en ce qu'elle comporte un cylindre transfert accumulateur (3i) entre le tambour de cardage (3h) et le premier cylindre (3j) de formation d'un voile non-tissé.Card comprising a carding drum (3h), carding members (3e, 3f) mounted on the periphery of the carding drum, and at least one card outlet comprising at least a first cylinder (3j) for forming a web not -woven (W1), characterized in that it comprises an accumulator transfer cylinder (3i) between the carding drum (3h) and the first cylinder (3j) for forming a nonwoven web. Carde selon la revendication 1 caractérisé en ce que le cylindre transfert accumulateur (3i) comporte, pour assurer la reprise des fibres à la périphérie du tambour de cardage (3h), une garniture (G) comprenant une pluralité de dents inclinées par rapport au rayon du cylindre transfert accumulateur (3i) et orientées dans le sens de rotation dudit cylindre, et en ce qu'en fonctionnement de la carde, le cylindre transfert accumulateur (3i) est entraíné dans un sens de rotation opposé au sens de rotation du tambour de cardage et avec une vitesse circonférentielle (V2) supérieure à la vitesse circonférentielle (V1) du tambour de cardage (3h).Card according to claim 1 characterized in that the accumulator transfer cylinder (3i) comprises, to ensure the recovery of the fibers at the periphery of the carding drum (3h), a lining (G) comprising a plurality of teeth inclined relative to the radius of the accumulator transfer cylinder (3i) and oriented in the direction of rotation of said cylinder, and in that in operation of the card, the accumulator transfer cylinder (3i) is driven in a direction of rotation opposite to the direction of rotation of the drum carding and with a circumferential speed (V2) greater than the circumferential speed (V1) of the carding drum (3h). Carde selon la revendication 2 caractérisée en ce que les vitesses circonférentielles (V1) du tambour de cardage (3h) et (V2) du cylindre transfert accumulateur (3i) sont réglées de telle sorte que le ratio de vitesse (V2/V1) est supérieur ou égal à 1,2, et de préférence supérieur ou égal à 1,3.Card according to claim 2 characterized in that the circumferential speeds (V1) of the carding drum (3h) and (V2) of the accumulator transfer cylinder (3i) are adjusted so that the speed ratio (V2 / V1) is greater or equal to 1.2, and preferably greater than or equal to 1.3. Carde selon l'une des revendications 1 à 4 caractérisée en ce que le cylindre transfert accumulateur (3i) comporte une garniture (G), et la vitesse de rotation du cylindre transfert accumulateur (3i) est réglée de telle sorte qu'en fonctionnement de la carde, le cylindre transfert accumulateur (3i) reprend, à chaque rotation du tambour de cardage (3h), plus de 90%, et de préférence 100%, des fibres transportées à la périphérie du tambour de cardage (3h).Card according to one of claims 1 to 4 characterized in that the accumulator transfer cylinder (3i) has a lining (G), and the speed of rotation of the accumulator transfer cylinder (3i) is adjusted so that in operation the card, the accumulator transfer cylinder (3i) takes up, at each rotation of the carding drum (3h), more than 90%, and preferably 100%, of the fibers transported to the periphery of the carding drum (3h). Carde selon l'une des revendications 1 à 4 caractérisée en ce que le diamètre (d) du cylindre transfert accumulateur (3i) est inférieur au diamètre (D) du tambour de cardage (3h).Card according to one of Claims 1 to 4, characterized in that the diameter (d) of the accumulator transfer cylinder (3i) is less than the diameter (D) of the carding drum (3h). Carde selon l'une des revendications 1 à 6 caractérisée en ce qu'elle comporte deux sorties comportant chacune un premier cylindre de formation de voile (3j) adjacent au même cylindre transfert accumulateur (3i).Card according to one of Claims 1 to 6, characterized in that it has two outlets each comprising a first sail-forming cylinder (3j) adjacent to the same accumulator transfer cylinder (3i). Carde selon l'une des revendications 1 à 7 caractérisée en ce que le premier cylindre (3j) de formation d'un voile non-tissé est un cylindre peigneur.Card according to one of claims 1 to 7 characterized in that the first cylinder (3j) for forming a nonwoven web is a combing cylinder. Carde selon la revendication 8 caractérisée en ce que le cylindre peigneur (3j) est suivi d'un unique cylindre condenseur (3k).Card according to claim 8 characterized in that the combing cylinder (3j) is followed by a single condensing cylinder (3k). Carde selon l'une des revendications 1 à 8 caractérisée en ce que le premier cylindre (3j) de formation d'un voile non-tissé est un cylindre contre-tambour.Card according to one of claims 1 to 8 characterized in that the first cylinder (3j) for forming a non-woven web is a counter-drum cylinder. Carde selon l'une des revendications 1 à 9 caractérisée en ce qu'elle comporte un ou plusieurs organes cardants (C1) qui sont montés à la périphérie du cylindre transfert accumulateur (3i), et qui de préférence sont positionnés dans une région située en amont de la zone ou des zones de transfert entre le cylindre transfert accumulateur (3i) et chaque premier cylindre (3j) de formation d'un voile non-tissé.Card according to one of Claims 1 to 9, characterized in that it comprises one or more carding members (C1) which are mounted on the periphery of the accumulator transfer cylinder (3i), and which are preferably positioned in a region located in upstream of the transfer zone or zones between the accumulator transfer cylinder (3i) and each first cylinder (3j) for forming a nonwoven web. Procédé de production d'un non-tissé au moyen d'une carde visé à l'une quelconque des revendications 1 à 10.Method for producing a nonwoven using a card referred to in any one of claims 1 to 10. Procédé selon la revendication 11 caractérisé en ce qu'à chaque rotation du tambour de cardage (3h), on reprend au moyen du cylindre transfert accumulateur (3i) plus de 90%,et de préférence 100% des fibres transportées à la périphérie du tambour de cardage (3h).Method according to Claim 11, characterized in that on each rotation of the carding drum (3h), more than 90%, and preferably 100% of the fibers transported to the periphery of the drum are taken up by means of the accumulator transfer cylinder (3i). carding (3h).
EP02370037A 2001-11-29 2002-09-27 Carding machine with an accumulator transfer cylinder Withdrawn EP1318217A1 (en)

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FR0115448A FR2832737B1 (en) 2001-11-29 2001-11-29 CARD HAVING AN ACCUMULATING TRANSFER CYLINDER AND METHOD FOR PRODUCING A NON-WOVEN
FR0115448 2001-11-29

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JPS59168131A (en) * 1983-03-15 1984-09-21 Kanai Jiyuuyou Kogyo Kk Apparatus for stripping web in carding machine
EP0950733A1 (en) * 1998-04-17 1999-10-20 Thibeau Method and installation for the forming of an airlay fiber web
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US4389753A (en) * 1981-10-05 1983-06-28 The Kendall Company Web takeoff roll
JPS59168131A (en) * 1983-03-15 1984-09-21 Kanai Jiyuuyou Kogyo Kk Apparatus for stripping web in carding machine
EP0950733A1 (en) * 1998-04-17 1999-10-20 Thibeau Method and installation for the forming of an airlay fiber web
US20010039695A1 (en) * 2000-05-11 2001-11-15 Ferdinand Leifeld Device for increasing the specific weight of fiber material in a carding machine

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3091541A1 (en) * 2019-01-08 2020-07-10 Andritz Perfojet Sas Nonwoven production facility
WO2020144084A1 (en) * 2019-01-08 2020-07-16 Andritz Perfojet Sas Unit and method for producing non-wovens
US11987916B2 (en) 2019-01-08 2024-05-21 Andritz Perfojet Sas Apparatus and method for producing nonwovens
FR3099495A1 (en) * 2019-07-30 2021-02-05 Andritz Perfojet Sas Non-woven production facility

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