EP0209410A1 - Method and apparatus for flax scutching - Google Patents

Method and apparatus for flax scutching Download PDF

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Publication number
EP0209410A1
EP0209410A1 EP86401210A EP86401210A EP0209410A1 EP 0209410 A1 EP0209410 A1 EP 0209410A1 EP 86401210 A EP86401210 A EP 86401210A EP 86401210 A EP86401210 A EP 86401210A EP 0209410 A1 EP0209410 A1 EP 0209410A1
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EP
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Prior art keywords
knives
rotor
attack
knife
rotors
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EP86401210A
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German (de)
French (fr)
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EP0209410B1 (en
Inventor
Stéphane Pinilo
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Institut Textile de France
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Institut Textile de France
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
    • D01B1/00—Mechanical separation of fibres from plant material, e.g. seeds, leaves, stalks
    • D01B1/10—Separating vegetable fibres from stalks or leaves
    • D01B1/14—Breaking or scutching, e.g. of flax; Decorticating
    • D01B1/28—Breaking or scutching, e.g. of flax; Decorticating with beaters rotating about an axis perpendicular to the fibre bundle

Definitions

  • the invention relates to the scutching of flax straw, and more particularly the separation, after creasing of the wood fibers, of the textile fibers by the mechanical action of blades.
  • the flax scutching operation has been carried out continuously in machines called turbines; the straw, previously crushed by pairs of fluted cylinders, is gripped and held by two belts then it passes between two rotors rotating in opposite directions, on which are fixed on their periphery, and parallel to their axis, blades of steel, commonly known as knives. During the rotary movement of the rotors, these knives strike the flax straw and remove the woody parts. A movement on the belts makes it possible to beat first the feet of said straws, then the heads. At the exit of the scouring turbine, the scoured flax is recovered, which is the textile part of the flax straws, stripped of the woody part. It is this dyed linen which after various combing, doubling, stretching, spinning operations will give the linen thread.
  • the action of the knives eliminates the woody part of the straws (anas), but also a textile part made up of the shortest flax fibers (tows). These tows are separated from the shives and will follow a circuit parallel to that of dyed flax to give a flax thread of another quality.
  • the action of the knives must be particularly violent.
  • the manufacturers of this type of material have, in order to achieve this effect, sought to obtain a large number of knife impacts on the straws; they consequently arranged on each rotor a large number of knives and increased the rotational speed of the rotors.
  • the scouring turbines offered for the market have 3 to 10 blades on which the scouring knives are fixed: cf., for example, the document FR-A-671 958 showing turbines with three blades where each blade is furnished with two knives precisely to increase the number of impacts on the straw.
  • the increase in the number of knives has another feature that has a complementary effect on the violence of their action: the scutching blades being positioned in the manner of the serrated wheels of a gear, the flax straws which hang from the holding and transport belts are simultaneously subjected to the action of several knives, on their two faces, a knife striking the straw on one side near the point of pinching of the belt while another continues its action on the other side.
  • the sheet of flax straw moving between the rotors from the pinch point between the conveyor belts is constantly and simultaneously struck by several knives throughout its course in the turbine.
  • the scouring method according to the invention is of the known type according to which two rotary rotors, rotating in opposite directions to one another and furnished with knives, each act on one side of a continuous sheet of flax straw so to extract the shives and the tows contained in said straws. It is characterized by the fact that the entire face of the linen sheet is treated with one of the attack knives of a rotor before one of the attack knives of the other rotor acts on the other side.
  • an attack knife from one of the two rotors strikes the straw ply, from the pinch point where it is held between the belts, for transport, and scrapes said ply over the entire surface corresponding to the opposite face of the rotor, before an attack knife of the other rotor acts in the same way on the other face of the straw layer.
  • the treatment of a rotor on the whole of one face of the linen sheet comprises a violent scraping action by means of an attack knife and a smoothing action by means of one or more smoothing knives.
  • a violent scraping action by means of an attack knife and a smoothing action by means of one or more smoothing knives.
  • the treatment of a rotor can also be supplemented by an action of regularization of the linen sheet by complementary active means.
  • the purpose of this action is to modify the arrangement of the fibrous strips with respect to each other inside the ply, so as to make the ply more homogeneous and to obtain a more regular scraping and smoothing action.
  • the linen sheet consists of a succession of linen straws which are gripped by the conveyor belts and which are more or less well distributed throughout the tablecloth.
  • This equipment comprises, in known manner, two identical rotary rotors, with parallel axes, rotating in opposite directions to one another. Equipped with blades and furnished with knives regularly distributed with respect to the axis of rotation of the corresponding rotor, these knives each acting on one side of the continuous linen straw table.
  • the angular spacing of the knives is at least equal to twice the arc of intersection of the rotors, the knives of one rotor being out of phase with respect to the other of the half of said angular spacing, whereby the entire face of the linen sheet is treated with a knife of a rotor before one of the knives of the other rotor acts on the other side.
  • each rotor has only two attack knives, diametrically opposite one another; the two rotors are arranged relative to each other so that, when the lines of attack of the two cutting knives of one of the rotors are in the plane passing through the axes of rotation of the two rotors , said plane is perpendicular to the plane passing through the attack lines of the two attack knives of the other rotor.
  • Each attack knife is a flat material which is disposed approximately tangentially with respect to the cylinder of revolution which it generates when the rotor rotates.
  • each blade also comprises at least one smoothing knife.
  • a smoothing knife is placed downstream of each attack knife, in the direction of rotation of the rotor; it is a flat material which is arranged so as to form an angle with the cylinder of revolution: generated by the cutting knife during its rotation. This angle is of the order of 30 °.
  • the smoothing lines of the two aforementioned smoothing knives are located on the cylinder of revolution generated by the attack lines of the two attack knives.
  • bars are placed, parallel to said axis of rotation, on which the flax straws are pressed when the rotor rotates, which prevents the winding of straws around the attack knife.
  • said bars can be replaced by secondary knives, flat materials, arranged parallel to the attack knives. This particular arrangement also makes it possible to significantly reduce the turbulence phenomena inside the turbine; the straw layer remains pressed on the secondary knives, while leaving free the passage of air, so the by-products which are detached under the action of the knives fall by gravity and it is then possible to recover them at continues by placing a conveyor belt at the bottom of the turbine.
  • the conformation of the two-blade rotors makes it possible to increase the cross-sectional area of the active scouring zone while reducing the size of the turbine and while retaining the efficiency necessary for scouring the longest straws.
  • the two rotors are arranged so that for each of them the cylinder of revolution generated by the line of attack of its attack knives passes as close as possible to the axis of rotation of 1 ' other rotor and that the line of intersection of the two corresponding cylinders of revolution is immediately below and as close as possible to the pinching point of the straws by the holding and transport belts.
  • FIG. 1 is a general exploded view of the scouring turbine according to the invention
  • FIG. 2 is a schematic cross-section of the turbine along a plane passing through blade support arms
  • Figure 3 is a schematic view of a turbine breaking down the different working phases of the turbine.
  • the flax straw 2 Prior to its entry into the turbine 1, the flax straw 2 was crumpled by continuous passage between the fluted cylinders, then pinched at about two thirds of its length between two belts, one male 3 and the other female 4 Thus the flax straw 2 enters the turbine 1 in the form of a sheet of flax which hangs freely from the pinch point between the two belts 3 and 4. The latter moving at the same speed in the direction of arrow F1, the ply 2 crosses the turbine, held by the belts 3 and 4, passing between the two rotors 5 and 6. At the outlet of the turbine, the belts 3 and 4 separate, and return separately to the station one for gripping straws 3 below the rotors from inside the turbine, the other 4 above the turbine.
  • the rotor 5 rotates in the direction of arrow F2, the rotor 6 in the opposite direction corresponding to arrow F3, each acting on one face of the linen sheet 2.
  • Each rotor comprises two blades 7 and 7 ′ rotating around an axis 8.
  • the axes 8 of rotation of the two rotors 5 and 6 are mutually parallel and parallel to the belts 3 and 4.
  • Each blade 7 consists of a longitudinal arm 9 on which are fixed on the one hand the attack knife 10 and on the other hand the smoothing knife 11.
  • the knives have the shape of a section bar of 50x3mm for the attack knives 10 and 30 x 2 mm for straightening knives, they run the entire length of the scouring turbine.
  • the longitudinal arm 9 is provided with knife holder devices allowing easy replacement of the knives in the event of their wear.
  • the attack knife 10 is positioned tangentially to its circle of revolution 12 (in dotted lines in FIG. 2) and the smoothing knife 11 makes an angle of 30 ° with the tangent 17 to this circle.
  • each rotor has a diameter of 850 mm, their axes of rotation are 550 mm apart, and their rotation speed can vary from 100 to 500 revolutions per minute.
  • Each blade also comprises three secondary knives 13, which are bars of section 30 x 2 mm parallel to the attack knives 10.
  • the set of longitudinal arms 9 and secondary knives 13 of the two blades of the same rotor 5 is fixed on transverse cross members 14 regularly spaced along the turbine 1 and integral with the axis 8 of rotation of the rotor 5.
  • the rotors 5 and 6 have a reduced diameter at the inlet of the turbine 1, which gradually increases until reaching the diameter of 850 mm. Thanks to this arrangement, already known in conventional turbines, the action of the knives on the straw layer is more progressive.
  • the operation of the scouring turbine 1 is as follows.
  • the sheet 2 of flax straws moves in the turbine 1 between the two rotors 5 and 6, and throughout its course is struck successively and alternately by the attack knives 10 of the two scouring blades, so that the attack knife 10 of the rotor 5 scrapes the whole of one face of the ply 2 before the attack knife 10 of the other rotor 6 acts on the other face.
  • the attack knife 10 strikes the ply 2 near the point where it is pinched between the two belts 3 and 4, then scrapes the entire surface of the ply 2.
  • FIG. 2 illustrates the action of each of the knives; it represents the rotor 6 while the attack knife 10 acts on the lower part of the ply 2.
  • the part of the straw 2a upstream of the attack knife 10 is pressed against the three secondary knives 13; the part of the straw 2b in the immediate vicinity of the attack knife 10 makes an acute angle of reduced value, of the order of 15 °, whose angle at the top is the line of attack of the knife 10; the part of the straw 2c downstream of the attack knife 10 is pressed against the smoothing knife II.
  • the attack knife 10 has a violent action due to the attack in itself and to the angle taken by the straw 2 during the scraping
  • the secondary knives 13 and the smoothing knife I1 have a complementary action of finishing and elimination of the by-products.
  • the shives and the tows eliminated during scutching fall by gravity onto the carpet: conveyor 16, placed at the bottom of the turbine 1, and are evacuated from the turbine 1 by displacement of said carpet 16.
  • each attack knife 10 there are arranged on the outer face of each attack knife 10 tips 15, perpendicular to the plane of said knife 10. These tips 15 are aligned like a comb in the longitudinal direction of the turbine. 1. During the rotation of the rotor, the points 15 penetrate into the sheet 2 of flax and have a disentangling and regularization action on the fibrous strips, inside the sheet 2. This particular arrangement makes it possible to increase the homogeneity of the ply and thereby having a scraping action of the attack knives 10 and smoothing of the other knives 11 and 13 more regular.
  • each point 15 is aimed so as to facilitate its replacement, has a sharp projection relative to the external surface of the cutting knife 10 of 15 mm and has a diameter of 6 to 8 mm.
  • Figure 3 illustrates the breakdown of the turbine 1 in its different working areas.
  • a first zone A in which the rotors have an increasing diameter, corresponds to the introduction of the ply 2; its length is 1000 mm.
  • a second preparation zone B in which each blade is provided with spikes 15 spaced 150 mm apart, its length is 3000 mm.
  • a third finishing zone C in which each blade is provided with spikes 15 spaced 100 mm apart; its length is 700 mm.
  • a fourth extraction zone D of 300 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

1. A flax scutching machine, of the type comprising two identical rotating rotors (5, 6) with parallel axes (8) rotating in opposite directions to one another and provided with blades and knives distributed uniformly with respect to the axis of rotation of the corresponding rotor, said knives each acting on one surface of the continuous lap of flax stalks, characterized in that the angular spacing between the knives (10) is at least equal to twise the arc of intersection of the rotors (5, 6), the knives (10) of one rotor (5) being phase-shifted with respect to the other rotor (6) by half the said angular spacing.

Description

L'invention concerne le teillage des paillea de lin, et plus particulièrement la séparation, après froissage des fibres de bois, des fibres textiles par l'action mécanique de lames.The invention relates to the scutching of flax straw, and more particularly the separation, after creasing of the wood fibers, of the textile fibers by the mechanical action of blades.

Depuis les années 1920, l'opération de teillage du lin est réalisée en continu dans des machines appelées des turbines ; la paille, préalablement broyée par des paires de cylindres cannelés, est saisie et maintenue par deux courroies puis elle passe entre deux rotors tournant en sens inverse, sur lesquels sont fixées sur leur périphérie, et paral1è- lement à leur axe, des lames d'acier, communément appelées couteaux. Au cours du mouvement rotatif des rotors, ces couteaux frappent la paille de lin et en éliminent les parties ligneuses. Un déplacement sur les courroies permet de battre d'abord les pieds desdites pailles, ensuite les têtes. A la sortie de la turbine de teillage, on récupère le lin teillé, qui est la partie textile des pailles de lin, débarrassée de la partie ligneuse. C'est ce lin teillé qui après différentes opérations de peignage, doublage, étirage, filage donnera le fil de lin.Since the 1920s, the flax scutching operation has been carried out continuously in machines called turbines; the straw, previously crushed by pairs of fluted cylinders, is gripped and held by two belts then it passes between two rotors rotating in opposite directions, on which are fixed on their periphery, and parallel to their axis, blades of steel, commonly known as knives. During the rotary movement of the rotors, these knives strike the flax straw and remove the woody parts. A movement on the belts makes it possible to beat first the feet of said straws, then the heads. At the exit of the scouring turbine, the scoured flax is recovered, which is the textile part of the flax straws, stripped of the woody part. It is this dyed linen which after various combing, doubling, stretching, spinning operations will give the linen thread.

En pratique, l'action des couteaux élimine la partie ligneuse des pailles (anas), mais aussi une partie textile constituée des fibres de lin les plus courtes (étoupes). Ces étoupes sont séparées des anas et suivront un circuit parallèle à celui du lin teillé pour donner un fil de lin d'une autre qualité.In practice, the action of the knives eliminates the woody part of the straws (anas), but also a textile part made up of the shortest flax fibers (tows). These tows are separated from the shives and will follow a circuit parallel to that of dyed flax to give a flax thread of another quality.

Il est couramment admis, que, pour obtenir une bonne extraction des parties ligneuses des pailles de lin l'action des couteaux doit être particulièrement violente. Les constructeurs de ce type de matériel ont pour réaliser cet effet cherché à obtenir un nombre important d'impacts de couteau sur les pailles ; ils ont en conséquence disposé sur chaque rotor un grand nombre de couteaux et augmenté la vitesse de rotation des rotors. Ainsi les turbines de teillage proposées pur le marché disposent de 3 à 10 pales sur lesquelles sont fixés les couteaux de teillage : cf., par exemple, le document FR-A-671 958 montrant des turbines à trois pales où chaque pale est garnie de deux couteaux précisément pour augmenter le nombre d'impacts sur la paille.Outre l'augmentation du nombre d'impacts sur la paille, l'augmentation du nombre de couteaux présente une autre particularité qui a un effet complémentaire sur la violence de leur action : les pales de teillage étant positionnées à la manière des roues dentelées d'un engrenage, les pailles de lin qui pendent des courroies de maintien et de transport sont soumises simultanément à l'action de plusieurs couteaux, sur leurs deux faces, un couteau frappant la paille sur une face près du point de pincement de la courroie pendant qu'un autre poursuit son action sur l'autre face. De la sorte, dans les turbines conventionnelles, la nappe de paille de lin se déplaçant entre les rotors à partir du point de pincement entre les courroies de transport est constamment et simultanément frappée par plusieurs couteaux tout au long de son parcours dans la turbine.It is commonly accepted that, in order to obtain good extraction from the woody parts of flax straw, the action of the knives must be particularly violent. The manufacturers of this type of material have, in order to achieve this effect, sought to obtain a large number of knife impacts on the straws; they consequently arranged on each rotor a large number of knives and increased the rotational speed of the rotors. Thus the scouring turbines offered for the market have 3 to 10 blades on which the scouring knives are fixed: cf., for example, the document FR-A-671 958 showing turbines with three blades where each blade is furnished with two knives precisely to increase the number of impacts on the straw. Besides the increase in the number of impacts on the straw, the increase in the number of knives has another feature that has a complementary effect on the violence of their action: the scutching blades being positioned in the manner of the serrated wheels of a gear, the flax straws which hang from the holding and transport belts are simultaneously subjected to the action of several knives, on their two faces, a knife striking the straw on one side near the point of pinching of the belt while another continues its action on the other side. In this way, in conventional turbines, the sheet of flax straw moving between the rotors from the pinch point between the conveyor belts is constantly and simultaneously struck by several knives throughout its course in the turbine.

La répartition des fibres textiles extraites des pailles de lin est de l'ordre de un tiers de fibres courtes (étoupes) et de deux tiers de fibres longues. Or, les étoupes sont des sous-produîts, dont la valeur marchande est nettement inférieure à celle des fibres longues, de l'ordre de trois fois moindre. On comprend que l'amélioration du teillage en vue d'augmenter le rendement en fibres longues est d'un grand intérêt économique.The distribution of textile fibers extracted from flax straws is on the order of one third of short fibers (tow) and two thirds of long fibers. However, tow is a by-product, the market value of which is much lower than that of long fibers, of the order of three times less. It is understood that the improvement in scutching with a view to increasing the yield of long fibers is of great economic interest.

Or, il a été prouvé que la disposition communément retenue des pales de teillage, et, donc de l'action violente des couteaux dans la turbine de teillage provoquait sur les extrémités des pailles de lin des coups de fouet très violents, dégageant celles-ci des couteaux avant que toute la longueur de la paille ait été travaillée. Cela constitue un facteur négatif contribuant à augmenter la quantité d'étoupes. On a pu vérifier aussi, que l'action mécanique des couteaux peut au-delà d'une certaine limite, non seulement détacher les anas et les fibres courtes existantes, mais aussi briser une partie des fibres longues et créer de nouvelles fibres courtes au détriment des fibres longues.However, it has been proven that the commonly used arrangement of scouring blades, and therefore of the violent action of the knives in the scouring turbine, caused very violent lashes on the ends of the flax straws, freeing them. knives before the full length of the straw has been worked. This constitutes a negative factor contributing to increasing the quantity of tows. We could also verify, that the mechanical action of the knives can beyond a certain limit, not only detach the shives and the existing short fibers, but also break some of the long fibers and create new short fibers at the expense long fibers.

C'est un des buts de l'invention que de proposer un procédé qui tout en conservant les principes du teillage conventionnel par turbine évite une action trop violente des couteaux et permet d'augmenter le rendement en fibres longues.It is one of the aims of the invention to propose a process which, while retaining the principles of conventional scouring by turbine, avoids too violent action of the knives and makes it possible to increase the yield of long fibers.

Le procédé de teillage selon l'invention est du type connu selon lequel deux rotors rotatifs, tournant en sens inverse l'un de l'autre et garnis de couteaux, agissent chacun sur une face d'une nappe continue de pailles de lin de manière à extraire les anas et les étoupes contenues dans lesdites pailles. Il se caractérise par le fait que la totalité d'une face de la nappe de lin est traitée par un des couteaux d'attaque d'un rotor avant que l'un des couteaux d'attaque de l'autre rotor n'agisse sur l'autre face. Ainsi un couteau d'attaque d'un des deux rotors frappe la nappe de paille, à partir du point de pincement où celle-ci est maintenue entre les courroies, de transport, et racle ladite nappe sur l'intégralité de la surface correspondant à la face en regard du rotor, avant qu'un couteau d'attaque de l'autre rotor n'agisse de la même manière sur l'autre face de la nappe de paille.The scouring method according to the invention is of the known type according to which two rotary rotors, rotating in opposite directions to one another and furnished with knives, each act on one side of a continuous sheet of flax straw so to extract the shives and the tows contained in said straws. It is characterized by the fact that the entire face of the linen sheet is treated with one of the attack knives of a rotor before one of the attack knives of the other rotor acts on the other side. Thus, an attack knife from one of the two rotors strikes the straw ply, from the pinch point where it is held between the belts, for transport, and scrapes said ply over the entire surface corresponding to the opposite face of the rotor, before an attack knife of the other rotor acts in the same way on the other face of the straw layer.

Avantageusement le traitement d'un rotor sur la totalité d'une face de la nappe de lin comprend une action violente de raclage au moyen d'un couteau d'attaque et une action de lissage au moyen d'un ou plusieurs couteaux de lissage. Pour parfaire l'action de raclage, il est souhaitable que la paille fasse au droit du couteau d'attaque un angle aigu, de valeur réduite, par exemple 15°, moyennant quoi le raclage obtenu est uniforme sur toute la hauteur de la nappe à teiller.Advantageously, the treatment of a rotor on the whole of one face of the linen sheet comprises a violent scraping action by means of an attack knife and a smoothing action by means of one or more smoothing knives. To perfect the scraping action, it is desirable for the straw to make an acute angle at the right of the attack knife, of reduced value, for example 15 °, whereby the scraping obtained is uniform over the entire height of the sheet to be scowl.

Le traitement d'un rotor peut également être complété par une action de régularisation de la nappe de lin par des moyens actifs complémentaires. Cette action a pour but de modifier la disposition des lanières fibreuses les unes par rapport aux autres à l'intérieur de la nappe , de manière à rendre la nappe plus homogène et obtenir une action de raclage et lissage plus régulière. Il faut rappeler en effet que, à l'entrée de la turbine, la nappe de lin est constituée d'une succession de pailles de lin qui sont saisies par les courroies de transport et qui sont plus ou moins bien réparties tout au long de la nappe.The treatment of a rotor can also be supplemented by an action of regularization of the linen sheet by complementary active means. The purpose of this action is to modify the arrangement of the fibrous strips with respect to each other inside the ply, so as to make the ply more homogeneous and to obtain a more regular scraping and smoothing action. It should be remembered that, at the entrance to the turbine, the linen sheet consists of a succession of linen straws which are gripped by the conveyor belts and which are more or less well distributed throughout the tablecloth.

C'est un autre objet de l'invention que de proposer un matériel de teillage spécialement conçu pour la mise en oeuvre du procédé précité. Ce matériel comporte de manière connue deux rotors rotatifs identiques, d'axes parallèles, tournant en sens inverse l'un de l'autre .équipés de pales et garnis de couteaux régulièrement répartis par rapport à l'axe de rotation du rotor correspondant, ces couteaux agissant chacun sur une face de la nappecontinue de pailles de lin. Selon l'aspect le plus général de l'invention, l'écartement angulaire des couteaux est au moins égal au double de l'arc d'intersection des rotors, les couteaux d'un rotor étant déphasés par rapport à l'autre de la moitié dudit écartement angulaire, moyennant quoi la totalité d'une face de la nappe de lin est traitée par un couteau d'un rotor avant que l'un des couteaux de l'autre rotor n'agisse sur l'autre face.It is another object of the invention to provide a scouring equipment specially designed for the implementation of the above process. This equipment comprises, in known manner, two identical rotary rotors, with parallel axes, rotating in opposite directions to one another. Equipped with blades and furnished with knives regularly distributed with respect to the axis of rotation of the corresponding rotor, these knives each acting on one side of the continuous linen straw table. According to the most general aspect of the invention, the angular spacing of the knives is at least equal to twice the arc of intersection of the rotors, the knives of one rotor being out of phase with respect to the other of the half of said angular spacing, whereby the entire face of the linen sheet is treated with a knife of a rotor before one of the knives of the other rotor acts on the other side.

Plus le nombre de pales est grand, plus l'arc d'intersection doit être petit, ce qui réduit l'intensité du battage de la nappe. C'est pourquoi, selon la réalisation préférée de l'invention, chaque rotor ne comporte que deux couteaux d'attaque, diamétralement opposés l'un à l'autre ; les deux rotors sont disposés l'un par rapport à l'autre de telle sorte que, lorsque les lignes d'attaque des deux couteaux d'attaque de l'un des rotors sont dans le plan passant par les axes de rotation des deux rotors, ledit plan est perpendiculaire au plan passant par les lignes d'attaque des deux couteaux d'attaque de l'autre rotor. Ainsi, la mise en oeuvre du procédé de l'invention est garantie quelle que soit l'interpénétration des deux rotors ce qui laisse une grande liberté dans le réglage du procédé. Chaque couteau d'attaque est un matériau plan qui est disposé de façon approximativement tangentielle par rapport au cylindre de révolution qu'il engendre lors de la rotation du rotor.The greater the number of blades, the smaller the arc of intersection, which reduces the intensity of the threshing of the sheet. This is why, according to the preferred embodiment of the invention, each rotor has only two attack knives, diametrically opposite one another; the two rotors are arranged relative to each other so that, when the lines of attack of the two cutting knives of one of the rotors are in the plane passing through the axes of rotation of the two rotors , said plane is perpendicular to the plane passing through the attack lines of the two attack knives of the other rotor. Thus, the implementation of the method of the invention is guaranteed regardless of the interpenetration of the two rotors, which leaves great freedom in the adjustment of the method. Each attack knife is a flat material which is disposed approximately tangentially with respect to the cylinder of revolution which it generates when the rotor rotates.

Avantageusement chaque pale comprend également au moins un couteau de lissage. Dans un mode préférentiel du matériel de l'invention, un couteau de lissage est placé en aval de chaque couteau d'attaque, dans le sens de la rotation du rotor ; c'est un matériau plan qui est disposé de manière à former un angle avec le cylindre de révolution:engendré par le couteau d'attaque lors de sa rotation. Cet angle est de 1' ordre de 30°. Pour un même rotor, les lignes de lissage des deux couteaux de lissage précités se trouvent sur le cylindre de révolution engendré par les lignes d'attaque des deux couteaux d'attaque.Advantageously, each blade also comprises at least one smoothing knife. In a preferred embodiment of the material of the invention, a smoothing knife is placed downstream of each attack knife, in the direction of rotation of the rotor; it is a flat material which is arranged so as to form an angle with the cylinder of revolution: generated by the cutting knife during its rotation. This angle is of the order of 30 °. For the same rotor, the smoothing lines of the two aforementioned smoothing knives are located on the cylinder of revolution generated by the attack lines of the two attack knives.

Entre un couteau d'attaque et l'axe de rotation du rotor correspondant, on place des barres, parallèles audit axe de rotation, sur lesquelles viennent se plaquer les pailles de lin lors de la rotation du rotor, ce qui évite l'enroulement des pailles autour du couteau d' attaque. Pour compléter l'action de lissage, on peut remplacer lesdites barres par des couteaux secondaires, matériaux plans, disposés parallèlement aux couteaux d'attaque. Cette disposition particulière permet de plus de diminuer sensiblement les phénomènes de turbulence à l'intérieur de la turbine ; la nappe de pailles reste plaquée sur les couteaux secondaires, tout en laissant libre le passage de l'air, de la sorte les sous-produits qui sont détachés sous l'action des couteaux tombent par gravité et il est alors possible de les récupérer à la continue en disposant en bas de la turbine une bande transporteuse.Between a cutting knife and the axis of rotation of the corresponding rotor, bars are placed, parallel to said axis of rotation, on which the flax straws are pressed when the rotor rotates, which prevents the winding of straws around the attack knife. To complete the smoothing action, said bars can be replaced by secondary knives, flat materials, arranged parallel to the attack knives. This particular arrangement also makes it possible to significantly reduce the turbulence phenomena inside the turbine; the straw layer remains pressed on the secondary knives, while leaving free the passage of air, so the by-products which are detached under the action of the knives fall by gravity and it is then possible to recover them at continues by placing a conveyor belt at the bottom of the turbine.

Par ailleurs, la conformation des rotors à deux pales permet d' augmenter la surface de la section de la zone active de teillage tout en réduisant le dimensionnement de la turbine et tout en conservant 1' efficacité nécessaire au teillage des pailles les plus longues. Pour ce faire, on dispose les deux rotors de telle sorte que pour chacun d'entre-eux le cylindre de révolution engendré par la ligne d'attaque de ses couteaux d'attaque passe au plus près de l'axe de rotation de 1' autre rotor et que la ligne d'intersection des deux cylindres de révolution correspondants soit immédiatement en dessous et au plus près du point de pincement des pailles par les courroies de maintien et de transport.Furthermore, the conformation of the two-blade rotors makes it possible to increase the cross-sectional area of the active scouring zone while reducing the size of the turbine and while retaining the efficiency necessary for scouring the longest straws. To do this, the two rotors are arranged so that for each of them the cylinder of revolution generated by the line of attack of its attack knives passes as close as possible to the axis of rotation of 1 ' other rotor and that the line of intersection of the two corresponding cylinders of revolution is immediately below and as close as possible to the pinching point of the straws by the holding and transport belts.

Afin de régulariser la nappe de lin tout au long de son traitement dans la turbine, on adjoint aux couteaux des moyens actifs complémentaires, positionnés sur la surface extérieure de chaque pale. Il s' agit notamment de pointes écartées les. unes. des. autres et alignées à la manière d'un peigne parallèlement à l'axe de rotation du rotor.In order to regularize the linen sheet throughout its treatment in the turbine, additional active means are added to the knives, positioned on the outer surface of each blade. It is acts in particular of points spaced apart. some. of. others and aligned like a comb parallel to the axis of rotation of the rotor.

L'invention sera mieux comprise à l'aide d'un exemple de réalisation décrit ci-après et illustré par le dessin annexé dans lequel : la figure 1 est une vue générale éclatée de la turbine de teillage selon l'invention,The invention will be better understood using an embodiment described below and illustrated by the appended drawing in which: FIG. 1 is a general exploded view of the scouring turbine according to the invention,

la figure 2 est une coupe transversale schématique de la turbine selon un plan passant par des bras supports de pâle,FIG. 2 is a schematic cross-section of the turbine along a plane passing through blade support arms,

la figure 3 est une vue schématique d'une turbine décomposant les dif- féréntes phases de travail de la turbine.Figure 3 is a schematic view of a turbine breaking down the different working phases of the turbine.

Préalablement à son entrée dans la turbine 1, la paille de lin 2 a été froissée par passage en continue entre les cylindres cannelés, puis pincée aux deux tiers environ de sa longueur entre deux courroies, l'une mâle 3 et l'autre femelle 4. Ainsi la paille de lin 2 entre dans la turbine 1 sous la forme d'une nappe de lin qui pend librement à partir du point de pincement entre les deux courroies 3 et 4. Ces dernières se déplaçant à la même vitesse dans le sens de la flèche F1, la nappe 2 traverse la turbine, maintenue par les courroies 3 et 4, en passant entre les deux rotors 5 et 6. A la sortie de la turbine, les courroies 3 et 4 se séparent, et reviennent séparément vers le poste de saisie des pailles l'une 3 par dessous les rotors par l'intérieur de la turbine,l' autre 4 au-dessus de la turbine. Le rotor 5 tourne dans le sens de la flèche F2, le rotor 6 dans le sens inverse correspondant à la flèche F3, chacun agissant sur une face de la nappe 2 de lin. Chaque rotor comprend deux pales 7 et 7' tournant autour d'un axe 8. Les axes 8 de rotation des deux rotors 5 et 6 sont parallèles entre eux et parallèles aux courroies 3 et 4. Chaque pale 7 est constituée d'un bras longitudinal 9 sur lequel sont fixés d'une part le couteau d'attaque 10 et d'autre part le couteau de lissage 11. Les couteaux ont la forme de barre de section de 50x3mm pour les couteaux d'attaque 10 et de 30 x 2 mm pour les couteaux de lissage, ils font toute la longueur de la turbine de teillage. Le bras longitudinal 9 est muni de dispositifs porte-couteaux permettant un remplacement aisé des couteaux en cas d'usure de ceux-ci. Le couteau d'attaque 10 est positionné tangentiellement à son cercle de révolution 12 (en pointillé sur la figure 2) et le couteau de lissage 11 fait un angle de 30° avec la tangente 17 à ce cercle.Dans l'exemple choisi chaque rotor a un diamètre de 850 mm, leurs axes de rotation sont éloignés de 550 mm, et leur vitesse de rotation peut varier de 100 à 500 tours par minute. Chaque pale comporte également trois couteaux secondaires 13, qui sont des barres de section 30 x 2 mm parallèles aux couteaux d'attaque 10. L'ensemble des bras longitudinaux 9 et des couteaux secondaires 13 des deux pales d'un même rotor 5 est fixé sur des traverses transversales 14 régulièrement espacées le long de la turbine 1 et solidaires de l'axe 8 de rotation du rotor 5.Prior to its entry into the turbine 1, the flax straw 2 was crumpled by continuous passage between the fluted cylinders, then pinched at about two thirds of its length between two belts, one male 3 and the other female 4 Thus the flax straw 2 enters the turbine 1 in the form of a sheet of flax which hangs freely from the pinch point between the two belts 3 and 4. The latter moving at the same speed in the direction of arrow F1, the ply 2 crosses the turbine, held by the belts 3 and 4, passing between the two rotors 5 and 6. At the outlet of the turbine, the belts 3 and 4 separate, and return separately to the station one for gripping straws 3 below the rotors from inside the turbine, the other 4 above the turbine. The rotor 5 rotates in the direction of arrow F2, the rotor 6 in the opposite direction corresponding to arrow F3, each acting on one face of the linen sheet 2. Each rotor comprises two blades 7 and 7 ′ rotating around an axis 8. The axes 8 of rotation of the two rotors 5 and 6 are mutually parallel and parallel to the belts 3 and 4. Each blade 7 consists of a longitudinal arm 9 on which are fixed on the one hand the attack knife 10 and on the other hand the smoothing knife 11. The knives have the shape of a section bar of 50x3mm for the attack knives 10 and 30 x 2 mm for straightening knives, they run the entire length of the scouring turbine. The longitudinal arm 9 is provided with knife holder devices allowing easy replacement of the knives in the event of their wear. The attack knife 10 is positioned tangentially to its circle of revolution 12 (in dotted lines in FIG. 2) and the smoothing knife 11 makes an angle of 30 ° with the tangent 17 to this circle. In the example chosen each rotor has a diameter of 850 mm, their axes of rotation are 550 mm apart, and their rotation speed can vary from 100 to 500 revolutions per minute. Each blade also comprises three secondary knives 13, which are bars of section 30 x 2 mm parallel to the attack knives 10. The set of longitudinal arms 9 and secondary knives 13 of the two blades of the same rotor 5 is fixed on transverse cross members 14 regularly spaced along the turbine 1 and integral with the axis 8 of rotation of the rotor 5.

Dans le mode de réalisation illustré sur les figures 1 et 3, les rotors 5 et 6 présentent à l'entrée de la turbine 1 un diamètre réduit, qui augmente progressivement jusqu'à atteindre le diamètre de 850 mm. Grâce à cette disposition, déjà connue dans les turbines conventionnelles, l'action des couteaux sur la nappe de pailles est plus progressive.In the embodiment illustrated in Figures 1 and 3, the rotors 5 and 6 have a reduced diameter at the inlet of the turbine 1, which gradually increases until reaching the diameter of 850 mm. Thanks to this arrangement, already known in conventional turbines, the action of the knives on the straw layer is more progressive.

Le fonctionnement de la turbine 1 de teillage est le suivant. La nappe 2 de pailles de lin se déplace dans la turbine 1 entre les deux rotors 5 et 6, et tout au long de son parcours est frappée successivement et alternativement par les couteaux d'attaque 10 des deux pales de teillage, de telle sorte que le couteau d'attaque 10 du rotor 5 racle la totalité d'une face de la nappe 2 avant que le couteau d'attaque 10 de l'autre rotor 6 n'agisse sur l'autre face. Le couteau d'attaque 10 frappe la nappe 2 près du point où celle-ci est pincée entre les deux courroies 3 et 4, puis racle toute la surface de la nappe 2. La figure 2 illustre l'action de chacun des couteaux ; elle représente le rotor6alors que le couteau d'attaque 10 agit sur la partie basse de la nappe 2. La partie de la paille 2a en amont du couteau d'attaque 10 est plaquée sur les trois couteaux secondaires 13 ; la partie de la paille 2b au voisinage immédiat du couteau d'attaque 10 fait un angle aigu de valeur réduite,de l'ordre de 15°, dont l'angle au sommet est la ligne d'attaque du couteau 10 ; la partie de la paille 2c en aval du couteau d'attaque 10 est plaquée sur le couteau de lissage II. Lors de la rotation du rotor, la paille 2 se déplace le long des différents couteaux : le couteau d'attaque 10 a une action violente due à l'attaque en elle-même et à l'angle pris par la paille 2 lors du raclage,les couteaux secondaires 13 et le couteau de lissage I1 ont une action complémentaire de finition et d'élimination des sous-produits.The operation of the scouring turbine 1 is as follows. The sheet 2 of flax straws moves in the turbine 1 between the two rotors 5 and 6, and throughout its course is struck successively and alternately by the attack knives 10 of the two scouring blades, so that the attack knife 10 of the rotor 5 scrapes the whole of one face of the ply 2 before the attack knife 10 of the other rotor 6 acts on the other face. The attack knife 10 strikes the ply 2 near the point where it is pinched between the two belts 3 and 4, then scrapes the entire surface of the ply 2. FIG. 2 illustrates the action of each of the knives; it represents the rotor 6 while the attack knife 10 acts on the lower part of the ply 2. The part of the straw 2a upstream of the attack knife 10 is pressed against the three secondary knives 13; the part of the straw 2b in the immediate vicinity of the attack knife 10 makes an acute angle of reduced value, of the order of 15 °, whose angle at the top is the line of attack of the knife 10; the part of the straw 2c downstream of the attack knife 10 is pressed against the smoothing knife II. During the rotation of the rotor, the straw 2 moves along the various knives: the attack knife 10 has a violent action due to the attack in itself and to the angle taken by the straw 2 during the scraping , the secondary knives 13 and the smoothing knife I1 have a complementary action of finishing and elimination of the by-products.

Les anas et les étoupes éliminés lors du teillage tombent par gravité sur le tapis: transporteur 16, placé au fond de la turbine 1, et sont évacués de la turbine 1 par déplacement dudit tapis 16.The shives and the tows eliminated during scutching fall by gravity onto the carpet: conveyor 16, placed at the bottom of the turbine 1, and are evacuated from the turbine 1 by displacement of said carpet 16.

Cette évacuation par tapis transporteur n'est possible que grâce au faible niveau des turbulences engendrées par le matériel de teillage selon l'invention; en effet dans les turbines conventionnelles la reprise des anas et des étoupes nécessite une forte aspiration à la partie inférieure de la turbine.This evacuation by conveyor belt is only possible thanks to the low level of turbulence generated by the scouring equipment according to the invention; indeed in conventional turbines the recovery of shives and tows requires a strong suction at the bottom of the turbine.

Selon un mode privilégié de réalisation, on dispose sur la face extérieure de chaque couteau d'attaque 10 des pointes 15, perpendiculaires au plan dudit couteau 10. Ces pointes 15 sont alignées à la façon d'un peigne dans le sens longitudinal de la turbine 1. Lors de la rotation du rotor, les pointes 15 pénètrent dans la nappe 2 de lin et ont une action de démêlage et de régularisation des lanières fibreuses, à l'intérieur de la nappe 2. Cette disposition particulière permet d' accroître l'homogénéité de la nappe et de ce fait d'avoir une action de raclage des couteaux d'attaque 10 et de lissage des autres couteaux 11 et 13 plus régulière. Dans l'exemple décrit, chaque pointe 15 est visée de manière à faciliter son remplacement, présente une saillie franche par rapport à la surface extérieure du couteau d'attaque 10 de 15 mm et a un diamètre de 6 à 8 mm.According to a preferred embodiment, there are arranged on the outer face of each attack knife 10 tips 15, perpendicular to the plane of said knife 10. These tips 15 are aligned like a comb in the longitudinal direction of the turbine. 1. During the rotation of the rotor, the points 15 penetrate into the sheet 2 of flax and have a disentangling and regularization action on the fibrous strips, inside the sheet 2. This particular arrangement makes it possible to increase the homogeneity of the ply and thereby having a scraping action of the attack knives 10 and smoothing of the other knives 11 and 13 more regular. In the example described, each point 15 is aimed so as to facilitate its replacement, has a sharp projection relative to the external surface of the cutting knife 10 of 15 mm and has a diameter of 6 to 8 mm.

La figure 3 illustre la décomposition de la turbine 1 dans ses différentes zones de travail. Une première zone A, dans laquelle les rotors ont un diamètre qui va en augmentant, correspond à l'introduction de la nappe 2 ; sa longueur est de 1000 mm. Une deuxième zone B de préparation, dans laquelle chaque pale est garnie de pointes 15 espacées de 150 mm, sa longueur est de 3000 mm. Une troisième zone C de finition, dans laquelle chaque pale est garnie de pointes 15 espacées de 100 mm; sa longueur est de 700 mm. Une quatrième zone D d'extraction de 300 mm.Figure 3 illustrates the breakdown of the turbine 1 in its different working areas. A first zone A, in which the rotors have an increasing diameter, corresponds to the introduction of the ply 2; its length is 1000 mm. A second preparation zone B, in which each blade is provided with spikes 15 spaced 150 mm apart, its length is 3000 mm. A third finishing zone C, in which each blade is provided with spikes 15 spaced 100 mm apart; its length is 700 mm. A fourth extraction zone D of 300 mm.

Grâce au matériel décrit, on a pu obtenir pour un même lot de lin un grain de l'ordre de dix pour cent de lin teillé par rapport à un matériel conventionnel.Thanks to the equipment described, it was possible to obtain, for the same batch of flax, a grain of the order of ten percent of dyed flax compared to conventional equipment.

Claims (13)

1. Procédé de teillage, du type connu selon lequel deux rotors rotatifs (5,6) tournant en sens inverse l'un de l'autre et garnis de couteaux (10,11), agissent chacun sur une face d'une nappe continue (2) de pailles de lin, caractérisé par le fait que la totalité d'une face de la nappe de lin (2) est traitée par un (10) des couteaux d'attaque d'un rotor (5) avant que l'un (10) des couteaux d'attaque de l'autre rotor (6) n'agisse sur l'autre face.1. scutching method, of the known type according to which two rotary rotors (5,6) rotating in opposite directions to one another and furnished with knives (10,11), each act on one side of a continuous web (2) of flax straws, characterized in that the whole of one face of the flax sheet (2) is treated by one (10) of the cutting knives of a rotor (5) before the one (10) of the attack knives of the other rotor (6) acts on the other face. 2. Procédé selon la revendication 1, caractérisé en ce que le traitement d'un rotor sur la totalité d'une face de la nappe de lin (2) comprend une action violente de raclage au moyen d'un couteau d'attaque (10) et une action de lissage au moyen d'un ou plusieurs couteaux de lissage (11).2. Method according to claim 1, characterized in that the treatment of a rotor on the whole of one face of the linen sheet (2) comprises a violent scraping action by means of an attack knife (10 ) and a smoothing action by means of one or more smoothing knives (11). 3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que le traitement d'un rotor (5) comprend une action de régularisation de la nappe de lin (2) par des moyens actifs complémentaires (15) qui homogénéise la disposition des lanières fibreuses à l'intérieur de ladite nappe.3. Method according to one of claims 1 and 2, characterized in that the treatment of a rotor (5) comprises an action of regularization of the linen sheet (2) by complementary active means (15) which homogenizes the arrangement of the fibrous strips inside said ply. 4. Matériel de teillage de lin, du type comprenant deux rotors rotatifs identiques (5,6), d'axes (8) parallèles, tournant en sens inverse l'un de l'autre, équipés de pales et garnis de couteaux régulièrement répartis par rapport à l'axe de rotation du rotor correspondant, ces couteaux agissant chacun sur une face de la nappe continue de pailles de lin, caractérisé en ce que l'écartement angulaire des couteaux (10) est au moins égal au double de l'arc d'intersection des rotors (5,6), les couteaux (10) d'un rotor (5) étant déphasés par rapport à l'autre rotor (6) de la moitié dudit écartement angulaire.4. Flax scutching equipment, of the type comprising two identical rotary rotors (5,6), with axes (8) parallel, rotating in opposite directions to each other, equipped with blades and furnished with regularly distributed knives relative to the axis of rotation of the corresponding rotor, these knives each acting on one face of the continuous sheet of flax straws, characterized in that the angular spacing of the knives (10) is at least twice the arc of intersection of the rotors (5,6), the blades (10) of a rotor (5) being out of phase with respect to the other rotor (6) by half of said angular spacing. 5. Matériel selon la revendication 4, caractérisé en ce que chaque rotor (5,6) ne comporte que deux couteaux d'attaque (10), diamétralement opposés l'un à l'autre et en ce que les deux rotors (5,6) sont disposés l'un par rapport à l'autre de telle sorte que, lorsque les lignes d'attaque des deux couteaux d'attaque (10) de l'un (5) des rotors sont dans le plan passant par les axes de rotation (8) des deux rotors, ledit plan est perpendiculaire au plan passant par les lignes d'attaque des deux couteaux d'attaque de l'autre rotor (6).5. Equipment according to claim 4, characterized in that each rotor (5,6) comprises only two attack knives (10), diametrically opposite one another and in that the two rotors (5, 6) are arranged relative to each other so that when the lines of attack of the two attack knives (10) of one (5) of the rotors are in the plane passing through the axes of rotation (8) of the two rotors, said plane is perpendicular to the plane passing through the attack lines of the two attack knives of the other rotor (6). 6. Matériel de teillage selon la revendication 5, caractérisé en ce qu'un couteau d'attaque (10) est un matériau rigide plan, disposé de façon approximativement tangentielle par rapport au cylindre de révolution (12) qu'il engendre lors de la rotation du rotor (5).6. scutching material according to claim 5, characterized in that an attack knife (10) is a rigid plane material, disposed approximately tangentially with respect to the cylinder of revolution (12) which it generates during the rotor rotation (5). 7. Matériel selon l'une des revendications 5 et 6, caractérisé en ce que chaque pale (7) d'un rotor (5) comprend un couteau de lissage (11).7. Equipment according to one of claims 5 and 6, characterized in that each blade (7) of a rotor (5) comprises a smoothing knife (11). 8. Matériel selon la revendication 7, caractérisé en ce que le couteau de lissage (11) est un matériau rigide plan, disposé à faire un angle d'environ 30° avec la tangente (17) au cylindre de révolution (12) engendré par le couteau d'attaque (10) lors de sa rotation.8. Equipment according to claim 7, characterized in that the smoothing knife (11) is a rigid plane material, arranged to make an angle of about 30 ° with the tangent (17) to the cylinder of revolution (12) generated by the attack knife (10) during its rotation. 9. Matériel selon l'une des revendications 7 et 8, caractérisé en ce qu'un couteau de lissage (11) est placé immédiatement en aval d'un couteau d'attaque (10) et en ce que, pour un même rotor (5) les extrémités des couteaux d'attaque (10) et de lissage (11) sont sur le même cylindre de révolution (12).9. Equipment according to one of claims 7 and 8, characterized in that a smoothing knife (11) is placed immediately downstream of an attack knife (10) and in that, for the same rotor ( 5) the ends of the attack (10) and smoothing (11) knives are on the same cylinder of revolution (12). 10. Matériel selon la revendication 6, caractérisé en ce que chaque pale (7) d'un rotor (5) comprend des couteaux secondaires (13), parallèles aux couteaux d'attaque (10) et disposés entre le couteau d'attaque (10) et l'axe de rotation (8) dudit rotor (5).10. Equipment according to claim 6, characterized in that each blade (7) of a rotor (5) comprises secondary knives (13), parallel to the attack knives (10) and arranged between the knife drive (10) and the axis of rotation (8) of said rotor (5). 11. Matériel selon la revendication 10, caractérisé en ce qu'il comprend un tapis transporteur (16), placé sous les rotors (5,6), dans le sens longitudinal de la turbine (1).11. Equipment according to claim 10, characterized in that it comprises a conveyor belt (16), placed under the rotors (5,6), in the longitudinal direction of the turbine (1). 12. Matériel selon la revendication 6, caractérisé en ce qu'il comprend des moyens actifs complémentaires de régularisation (15) placés sur la surface extérieure de chaque pale (7).12. Equipment according to claim 6, characterized in that it comprises complementary active regulation means (15) placed on the outer surface of each blade (7). 13. Matériel selon la revendication 12, caractérisé en ce que les moyens actifs de régularisation consistent en des pointes (15) écartées les unes des autres à la manière d'un peigne.13. Equipment according to claim 12, characterized in that the active regulation means consist of spikes (15) spaced from each other in the manner of a comb.
EP19860401210 1985-06-18 1986-06-05 Method and apparatus for flax scutching Expired EP0209410B1 (en)

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FR8509255A FR2583434B1 (en) 1985-06-18 1985-06-18 PROCESS AND MATERIAL FOR BEE-LINING
FR8509255 1985-06-18

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EP0209410B1 EP0209410B1 (en) 1989-05-24

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FR671958A (en) * 1928-04-27 1929-12-20 Boby Ltd Robert scatters or scutching blades for scutching machines for flax and similar fibrous materials
GB514221A (en) * 1938-01-04 1939-11-02 Automatic Flax Production Unit Improvements in machines for scutching flax or like plant stalks
FR1030930A (en) * 1950-06-27 1953-06-18 Method and installation for treating plants and textile fibers to form a material ready for spinning
FR1053851A (en) * 1951-04-24 1954-02-05 Sativa Corp Improvements made to shelling machines for fibrous materials
FR2142766A1 (en) * 1971-06-24 1973-02-02 Staelen Pierre Fibre hackling machine - for scutched flax

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993005211A1 (en) * 1991-09-05 1993-03-18 The Minister Of Agriculture Fisheries And Food In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Separating mechanism
GB2273943A (en) * 1991-09-05 1994-07-06 Mini Agriculture & Fisheries Separating mechanism
GB2273943B (en) * 1991-09-05 1995-10-25 Mini Agriculture & Fisheries Separating mechanism
CN111139534A (en) * 2020-02-24 2020-05-12 中国农业科学院麻类研究所 Improved ramie decorticating device
CN111139534B (en) * 2020-02-24 2021-08-20 中国农业科学院麻类研究所 Improved ramie decorticating device

Also Published As

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FR2583434A1 (en) 1986-12-19
EP0209410B1 (en) 1989-05-24
FR2583434B1 (en) 1988-04-08
DE3663539D1 (en) 1989-06-29

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