EP0282410B1 - Method and device for impregnating an elongated element - Google Patents

Method and device for impregnating an elongated element Download PDF

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Publication number
EP0282410B1
EP0282410B1 EP88400545A EP88400545A EP0282410B1 EP 0282410 B1 EP0282410 B1 EP 0282410B1 EP 88400545 A EP88400545 A EP 88400545A EP 88400545 A EP88400545 A EP 88400545A EP 0282410 B1 EP0282410 B1 EP 0282410B1
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EP
European Patent Office
Prior art keywords
substance
supply station
accordance
transfer means
transfer
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.)
Expired - Lifetime
Application number
EP88400545A
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German (de)
French (fr)
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EP0282410A3 (en
EP0282410A2 (en
Inventor
Michel Huvey
Lucien Montabord
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IFP Energies Nouvelles IFPEN
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IFP Energies Nouvelles IFPEN
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Publication of EP0282410A3 publication Critical patent/EP0282410A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/12—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being fed round the roller
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/10—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by contact with a member carrying the treating material
    • D06B1/14—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by contact with a member carrying the treating material with a roller
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B21/00—Successive treatments of textile materials by liquids, gases or vapours

Definitions

  • the present invention relates to a device and method for impregnating elongated elements with a heat-stabilizable substance.
  • the present invention provides an improvement of the device and of the method of impregnating elongated and reinforced elements, such as resistant threads or fabrics, by means of a thermosetting substance, such as a thermosetting liquid resin. .
  • heat-stabilizable substance means all substances whose characteristics are modified in a lasting or permanent manner under the action of heat and / or temperature.
  • This thermal action may be the sole action responsible for the process of modifying the characteristics of the substance, as may occur for crosslinking or vulcanization of the material.
  • This thermal action can also not be the only action to produce lasting or permanent modifications of the material, but act concomitantly with other actions, such as the oxidation or evaporation of the material, or part of it -this.
  • the heat-stabilizable substances which can be used by the invention are preferably, but not necessarily, fluid at the different temperatures imposed on the substance in the device, or according to the method according to the invention.
  • These substances can be, for example, thermosetting materials, elastomers, thermoplastics, or metals.
  • the elongated elements may be elongated reinforcing elements, such as metal reinforcing wires, polyamide, KEVLAR which is a polyaramide, the trademark of which is registered by the Dupont de Nemours Company, glass, carbon, arranged in layers of parallel wires, in braids, or in fabrics.
  • elongated reinforcing elements such as metal reinforcing wires, polyamide, KEVLAR which is a polyaramide, the trademark of which is registered by the Dupont de Nemours Company, glass, carbon, arranged in layers of parallel wires, in braids, or in fabrics.
  • thermo regulation means for example heating means, in which the impregnation substance is arranged and in which a transfer drum enters. the substance to the impregnation area of the elongated elements.
  • a radiant panel generally provides additional heating of the substance at the level of the impregnation zone.
  • the present invention makes it possible to improve the quality of impregnation of the elongated elements, in particular as regards the deeper penetration of the substance and the reduction of inclusions of air bubbles, to increase the production rate, and finally to significantly limit the loss of materials, in particular of the heat-stabilizable substance.
  • the device and method according to the present invention in many cases make it possible to reduce and even eliminate the addition of solvent to the heat-stabilizable substances.
  • it becomes possible according to the present invention by eliminating the addition of solvents to dispense with the solvent removal means which are generally used upstream of the impregnation device according to the prior art.
  • the flexibility of the implementation of the present invention allows the insertion of the proposed device in a production line continuously or discontinuously, especially when stops are there. possible.
  • the device and the method according to the invention consist notably, at the time of impregnation, in improving the characteristics of the impregnating substance, in particular in achieving the reduction in its viscosity by a rise in temperature, at by means of circumscribed heating, while keeping the substance waiting to be used at a lower temperature.
  • the temperatures of the substance at the time of impregnation, or waiting to be used can be either higher or lower than ambient temperature, or l 'one superior and the other inferior.
  • the means, such as heating or cooling means, used to maintain a temperature difference will generally be defined as thermoregulation means.
  • the invention overcomes the drawbacks of the prior art which uses a much lower and often very insufficient impregnation temperature, and results in an impasto of the transfer member and of the feeding station, a rapid evolution of the substance waiting to be used, and significant loss of substance.
  • the invention provides a device for impregnating an elongated element by transfer of heat-stabilizable substance from a substance supply station to the element by means of a transfer member, the element being moved longitudinally in front the transfer member, said transfer member comprising a movable surface passing through the station, then in front of the element, the substance being deposited on the surface at the level of the station and being transferred at least partially onto the element, in a area adjacent to said element.
  • the device is particularly characterized in that the transfer member comprises thermoregulation means, such as reheating means, adapted so that the temperature of the surface at the level of the impregnation zone is substantially higher than that of the substance in the post.
  • thermoregulation means such as reheating means
  • the supply station may include thermoregulation means adapted so that the temperature of the substance in the station is substantially lower than the temperature of the surface at the level of the impregnation zone.
  • the device may include a wringer adapted to release from the surface the substance not transferred by the element, this wringer being located upstream of said supply station.
  • the device may include a metering element placed downstream of the feeding station, this metering element being adapted to produce, on the surface, a layer of uniform substance and adjusted in thickness.
  • the device may include at least one system, such as a roller, which prepares the element to be impregnated, upstream of the zone where the element is impregnated.
  • at least one system such as a roller, which prepares the element to be impregnated, upstream of the zone where the element is impregnated.
  • the device may include means for spreading the elongated element relative to said transfer member and the transfer member may include safety drive means adapted to move the transfer member once the spreading means have been put in place. in action.
  • a part of said elongated element may be applied against a part of said transfer member, and the reinforcing element may cause said transfer member to move.
  • thermostable substance may be a thermosetting resin.
  • the transfer member may include at least one cylinder of revolution.
  • the feed station may include a tank where said substance is located and the transfer member may immerse in said tank.
  • the feed station may include a container where the substance is located and a circulation device adapted to take the substance located in the container, to route it to the transfer member and to properly coat the latter with the latter.
  • the device may include spacing means adapted to separate the transfer member from the supply station.
  • the invention also provides a method of impregnating a reinforcing element by transfer of heat-stabilizable substance from a substance supply station up to said element to be impregnated by means of a transfer member having a movable surface on which is deposited said substance.
  • This method is particularly characterized in that the surface temperature is maintained substantially higher than that of the station.
  • the elongated element 1 is, for example, composed of a set of one or more strands of reinforcing filaments placed parallel along their longitudinal axis and substantially in the same plan.
  • This elongate element 1 is supported on two preparer rollers or openers 2, of diameters, spacing and transverse arrangement adapted to the nature and dimensions of the wicks to possibly produce a rupture of the binder which agglomerates the reinforcing threads and thus allow opening the wicks.
  • the elongated element 1 is first applied to the transfer member 3 to undergo the impregnation of a defined quantity of thermosetting substance, then move away from said transfer member 3 to undergo cutting or be used directly, for example, for the continuous manufacture of armor made of composite material, in particular the armor made up of a reinforced tube, or the manufacture of a tube or 'an object by filament winding.
  • the elongated element 1 is applied to the transfer member 3, but it could also not apply to it and pass to its vicinity, the material transfer being effected by centrifugal, electrostatic or fluidics, for example.
  • the configuration described is simple and very effective.
  • the transfer member 3 comprises a cylindrical drum of circular section which rotates around an axis 4 and is driven by the intermediary of the elongated element 1, the drive of which is compulsory.
  • the transfer member 3 could also include a flexible conveyor belt mounted on rollers.
  • the interior of the transfer member 3 is lined with heating means 5, by electrical resistance, hot air or heat transfer fluid, etc., adapted to maintain a high temperature so that the substance, which behaves at this temperature like a fluid, has its lowest possible viscosity and permeates in depth the elongate element 1, without inclusion of air, sufficiently and without excess of substance.
  • the tests carried out with a transfer member 3 50 cm wide and 30 cm in diameter and with a thermosetting resin as impregnating substance, show that, depending on the speed of production, the temperature on the surface of the transfer member at the level of the impregnation zone can be comprised, for example, between 70 and 140 ° C. depending on the impregnation speed of the elongated element and the temperature of the supply station 7 comprised between 7 and 25 ° C. depending on the temperature of the water used for cooling.
  • thermosetting resin was composed of 100 parts of diglycidyl ether of bisphenol A (base), 90 parts of internal anhydride of 2.3 dicarboxylic acid, 1.5 norbonene, X methyl (hardener) and of 2 parts of benzyldimethylamine (accelerator).
  • the temperature of the feed station 7 is adapted so as to limit the chemical evolution of the substance contained in the feed station and on the other hand, to ensure the proper supply of the organ transfer 3.
  • the temperature of the transfer member 3 is adapted so that the viscosity of the impregnation substance is the lowest necessary at the level of the impregnation zone to allow correct impregnation of the elongated elements 1 and that the chemical evolution of the substance on the transfer organ is minimal.
  • thermosetting resin must remain fusible or melted in the device.
  • thermosetting substance 8 is located in the lower part of said member 3, so that the feed station can advantageously include a tray 9 where the substance 8 is located.
  • the tank 9 comprises cooling means 10, such as a cooling coil with running water, or an exchanger connected to a refrigeration unit, or alternatively cooling fins possibly placed in a forced air stream.
  • cooling means 10 such as a cooling coil with running water, or an exchanger connected to a refrigeration unit, or alternatively cooling fins possibly placed in a forced air stream.
  • the heating of the tank 9 is due to the heat coming from the transfer member 3, either directly by contact with the substance 8, or by the substance which has been deposited on the transfer member 3 at the station d 'feed 7, which was not removed during the impregnation of the elongated element 1 and which is released from the surface of the transfer member 3, either after the impregnation and upstream of the feed station 7, by a wringer 11, either downstream of the feed station by scrapers 14.
  • the upstream of a point considered is the area that an element of matter traverses during the technical process before arriving at the point considered, whereas on the contrary the downstream is the area which is reached after the point considered.
  • the cooling makes it possible to maintain the feeding station 7 for example at the temperature of 20 ° C., so as to slow down the gelling of the resin or, in general, the evolution of the impregnation substance.
  • the substance eliminated by the wringer 11 is returned to a cold zone of the tank 9 thanks to a separating partition 12, so as to stop as quickly as possible the evolution of the substance removed.
  • a separating partition 12 it is also possible to return the eliminated substance by distributing it in the vicinity of the transfer member 3, so that the substance is rapidly consumed by the impregnation.
  • the substance is prevented from stagnating on parts of the surface of the transfer member 3 which are not devoid of substance by the impregnation of the elongated element 1.
  • a metering element 13 Downstream of the feed station 7 is arranged a metering element 13 making it possible to standardize and adjust the thickness of the layer of substance with which the transfer member 3 is covered while passing through the feed station 7. The excess substance then returns to station 7.
  • the thickness of the layer is adjusted so that the wicks constituting the elongate element 1 are correctly (not enough, not too much) impregnated.
  • the feed tank 9 can conform to the geometry of the transfer member 3, so as to reduce the amount of substance located in the tank and heated by the member 3. A thickness of substance between the bottom of the tank 9 and the member 3 from 5 to 30 mm is satisfactory. However, this arrangement requires refilling the tank with fresh resin more frequently than when the tank is larger.
  • the volume of the tank can be increased.
  • the device comprises spacing means between the elongated element 1 and said organ 3.
  • These means can be composed of a roller 16 actuated by a movable arm 17 in the event of a stop.
  • the roller being initially located between the wicks 1 and the transfer member 3, then leads to the position 18 mentioned in dotted lines.
  • a safety drive member 19 will make it possible to maintain the member 3 in rotation if it does not have an independent motorization.
  • the device very variable production rates can be obtained with a production of impregnated wicks from 0.2 m / min to 100 m / min and preferably from 2 m / min to 25 m / min, without risk of gelling of the transfer member and the feeding station.
  • the quality of the impregnation is increased by the good penetration of the resin into the elongated element.
  • Figure 2 illustrates a variant of the embodiment according to the invention illustrated in Figure 1.
  • the similar elements of Figures 1 and 2 are designated by the same reference numerals.
  • the supply station 7 comprises a circulation member 21 of cylindrical shape rotating around a fixed axis 22 and taking from its periphery the impregnation substance by an immersion of this member 21 in the tank 9 filled with substance.
  • the substance removed by the circulation member 21 is routed by rotation from the member 21 to the transfer member 3 which then coats therewith.
  • the space between the transfer member 3 and the circulation member 21 is adapted to allow good coating of the latter.
  • a gear train (not shown), protected from any projections of the substance, ensures synchronization between the transfer member 3 and the circulation member 21, so as to ensure correct coating of the transfer member and correct impregnation.
  • the toothing height of these gears can be such that the drive of the circulation member 21 is possible when, by spacing means 23, the transfer members 3 and the circulation members 21 are spaced, for example for stopping advancement of the elongated elements 1, once the spacing means 16, 17 and the safety drive member 19 of the transfer member 3 have been put into action.
  • Product spacing allows the organ to be completely wrung out transfer 3 and to prevent the substance therein from undergoing a chemical evolution.
  • the feeding station includes two scrapers 24 eliminating the flanges of the circulation member 21, the impregnation substance. These scrapers are advantageously arranged just upstream of the substance 21 being removed by the member 21, so as to ensure the best possible cooling of the latter and the renewal of the substance located on its flanges.
  • the flanges of the transfer member 3 are covered with substance over a more restricted peripheral area than in the first embodiment (Fig. 1), the length of the scrapers 14 can be reduced.
  • a radiant panel For certain types of products and impregnation conditions, it is possible to add to the device, at the zone level impregnation, a radiant panel, so as to locally increase the temperature of the substance to improve the impregnation of the wicks.
  • the transfer member it is also possible to coat the transfer member by melting a block of substance placed at a temperature sufficient for it to be solid.
  • the substance wrung out by the wringing member can then, for example, be taken directly to the point of contact of the block and of the transfer member.
  • the feed station will therefore include specific means to ensure contact with the block and the transfer member.

Description

La présente invention concerne un dispositif et une méthode permettant d'imprégner des éléments allongés avec une substance thermostabilisable.The present invention relates to a device and method for impregnating elongated elements with a heat-stabilizable substance.

D'une façon plus particulière, la présente invention propose une amélioration du dispositif et de la méthode d'imprégnation d'éléments allongés et renforcés, tels des fils ou des tissus résistants, au moyen d'une substance thermodurcissable, telle une résine liquide thermodurcissable.More particularly, the present invention provides an improvement of the device and of the method of impregnating elongated and reinforced elements, such as resistant threads or fabrics, by means of a thermosetting substance, such as a thermosetting liquid resin. .

Par substance thermostabilisable, on entend toutes les substances dont les caractéristiques se modifient de façon durable ou permanente sous l'action de la chaleur et/ou de la température.The term “heat-stabilizable substance” means all substances whose characteristics are modified in a lasting or permanent manner under the action of heat and / or temperature.

Cette action thermique peut être l'unique action responsable du processus de modification des caractéristiques de la substance, comme cela peut se produire pour une réticulation ou une vulcanisation du matériau. Cette action thermique peut aussi n'être pas la seule action à produire des modifications durables ou permanentes du matériau, mais agir en concomittance avec d'autres actions, telles l'oxydation ou l'évaporation du matériau, ou d'une partie de celui-ci.This thermal action may be the sole action responsible for the process of modifying the characteristics of the substance, as may occur for crosslinking or vulcanization of the material. This thermal action can also not be the only action to produce lasting or permanent modifications of the material, but act concomitantly with other actions, such as the oxidation or evaporation of the material, or part of it -this.

Les substances thermostabilisables utilisables par l'invention sont de préférence, mais non nécessairement, fluides aux différentes températures imposées à la substance dans le dispositif, ou suivant la méthode, selon l'invention. Ces substances peuvent être, par exemple, des matériaux thermodurcissables, des élastomères, des thermoplastiques, ou des métaux.The heat-stabilizable substances which can be used by the invention are preferably, but not necessarily, fluid at the different temperatures imposed on the substance in the device, or according to the method according to the invention. These substances can be, for example, thermosetting materials, elastomers, thermoplastics, or metals.

Les éléments allongés pourront être des éléments de renforts allongés, tels des fils d'armature en métal, polyamide, KEVLAR qui est un polyaramide dont la marque est déposée par la Société Dupont de Nemours, verre, carbone, disposés en nappes de fils parallèles, en tresses, ou en tissus.The elongated elements may be elongated reinforcing elements, such as metal reinforcing wires, polyamide, KEVLAR which is a polyaramide, the trademark of which is registered by the Dupont de Nemours Company, glass, carbon, arranged in layers of parallel wires, in braids, or in fabrics.

Selon l'art antérieur, lorsque l'on désire imprégner des éléments allongés, on utilise un bac pourvu de moyens de régulation thermique, par exemple des moyens de chauffage, dans lequel est disposée la substance d'imprégnation et dans lequel pénètre un tambour transférant la substance vers la zone d'imprégnation des éléments allongés. Un panneau radiant assure en général un réchauffage complémentaire de la substance au niveau de la zone d'imprégnation.According to the prior art, when it is desired to impregnate elongated elements, use is made of a tank provided with thermal regulation means, for example heating means, in which the impregnation substance is arranged and in which a transfer drum enters. the substance to the impregnation area of the elongated elements. A radiant panel generally provides additional heating of the substance at the level of the impregnation zone.

Relativement à l'art antérieur, la présente invention permet d'améliorer la qualité d'imprégnation des éléments allongés, notamment en ce qui concerne la pénétration plus profonde de la substance et la réduction des inclusions de bulles d'air, d'accroître la cadence de production, et enfin de restreindre notablement les pertes de matières, en particulier de la substance thermostabilisable.Relative to the prior art, the present invention makes it possible to improve the quality of impregnation of the elongated elements, in particular as regards the deeper penetration of the substance and the reduction of inclusions of air bubbles, to increase the production rate, and finally to significantly limit the loss of materials, in particular of the heat-stabilizable substance.

De plus le dispositif et la méthode selon la présente invention permettent dans de nombreux cas de réduire et même de supprimer l'adjonction de solvant aux substances thermostabilisables. Ainsi il devient possible selon la présente invention en supprimant l'adjonction de solvants de se passer des moyens d'élimination des solvants qui sont généralement utilisés en amont du dispositif d'imprégnation selon l'art antérieur.In addition, the device and method according to the present invention in many cases make it possible to reduce and even eliminate the addition of solvent to the heat-stabilizable substances. Thus it becomes possible according to the present invention by eliminating the addition of solvents to dispense with the solvent removal means which are generally used upstream of the impregnation device according to the prior art.

La flexibilité de la mise en oeuvre de la présente invention permet l'insertion du dispositif proposé dans une chaîne de production en continu ou en discontinu, notamment lorsque des arrêts y sont possibles.The flexibility of the implementation of the present invention allows the insertion of the proposed device in a production line continuously or discontinuously, especially when stops are there. possible.

D'une manière simplifiée, le dispositif et le procédé selon l'invention consistent notamment, au moment de l'imprégnation, à améliorer les caractéristiques de la substance imprégnante, en particulier à réaliser la diminution de sa viscosité par une élévation de température, au moyen d'un chauffage circonscrit, tout en maintenant à une température inférieure la substance en attente d'être utilisée.In a simplified manner, the device and the method according to the invention consist notably, at the time of impregnation, in improving the characteristics of the impregnating substance, in particular in achieving the reduction in its viscosity by a rise in temperature, at by means of circumscribed heating, while keeping the substance waiting to be used at a lower temperature.

Selon les substances utilisables dans le dispositif d'imprégnation selon l'invention, les températures de la substance au moment de l'imprégnation, ou en attente d'être utilisée, peuvent être soit supérieures, soit inférieures, à la température ambiante, soit l'une supérieure et l'autre inférieure. Pour cela, les moyens, tels que des moyens de réchauffage ou de refroidissement, utilisés pour maintenir un écart de températures, seront généralement définis comme moyens de thermorégulation.Depending on the substances which can be used in the impregnation device according to the invention, the temperatures of the substance at the time of impregnation, or waiting to be used, can be either higher or lower than ambient temperature, or l 'one superior and the other inferior. For this, the means, such as heating or cooling means, used to maintain a temperature difference, will generally be defined as thermoregulation means.

L'invention remédie aux inconvénients de l'art antérieur qui utilise une température d'imprégnation beaucoup plus basse et souvent très insuffisante, et se traduit par un empâtement de l'organe de transfert et du poste d'alimentation, une évolution rapide de la substance en attente d'être utilisée, et des pertes importantes de substance.The invention overcomes the drawbacks of the prior art which uses a much lower and often very insufficient impregnation temperature, and results in an impasto of the transfer member and of the feeding station, a rapid evolution of the substance waiting to be used, and significant loss of substance.

L'invention fournit un dispositif d'imprégnation d'un élément allongé par transfert de substance thermostabilisable depuis un poste d'alimentation de la substance jusqu'à l'élément au moyen d'un organe de transfert, l'élément étant déplacé longitudinalement devant l'organe de transfert, ledit organe de transfert comportant une surface mobile passant dans le poste, puis devant l'élément, la substance étant déposée sur la surface au niveau du poste et en étant transférée au moins partiellement sur l'élément, dans une zone voisine dudit élément.The invention provides a device for impregnating an elongated element by transfer of heat-stabilizable substance from a substance supply station to the element by means of a transfer member, the element being moved longitudinally in front the transfer member, said transfer member comprising a movable surface passing through the station, then in front of the element, the substance being deposited on the surface at the level of the station and being transferred at least partially onto the element, in a area adjacent to said element.

Le dispositif est notamment caractérisé en ce que l'organe de transfert comporte des moyens de thermorégulation, tels des moyens de réchauffage, adaptés à ce que la température de la surface au niveau de la zone d'imprégnation soit sensiblement supérieure à celle de la substance dans le poste.The device is particularly characterized in that the transfer member comprises thermoregulation means, such as reheating means, adapted so that the temperature of the surface at the level of the impregnation zone is substantially higher than that of the substance in the post.

Le poste d'alimentation pourra comporter des moyens de thermorégulation adaptés à ce que la température de la substance dans le poste soit sensiblement inférieure à la température de la surface au niveau de la zone d'imprégnation.The supply station may include thermoregulation means adapted so that the temperature of the substance in the station is substantially lower than the temperature of the surface at the level of the impregnation zone.

Le dispositif pourra comporter un organe essoreur adapté à dégager de la surface la substance non transférée par l'élément, cet organe essoreur étant situé en amont dudit poste d'alimentation.The device may include a wringer adapted to release from the surface the substance not transferred by the element, this wringer being located upstream of said supply station.

Le dispositif pourra comporter un élément doseur placé en aval du poste d'alimentation, cet élément doseur étant adapté à produire, sur la surface, une couche de substance uniforme et réglée en épaisseur.The device may include a metering element placed downstream of the feeding station, this metering element being adapted to produce, on the surface, a layer of uniform substance and adjusted in thickness.

Le dispositif pourra comporter au moins un système, tel un rouleau, préparateur de l'élément à imprégner, en amont de la zone où l'élément est imprégné.The device may include at least one system, such as a roller, which prepares the element to be impregnated, upstream of the zone where the element is impregnated.

Le dispositif pourra comporter des moyens d'écartement de l'élément allongé relativement audit organe de transfert et l'organe de transfert pourra comporter des moyens d'entraînement de sécurité adaptés à mouvoir l'organe de transfert une fois les moyens d'écartement mis en action.The device may include means for spreading the elongated element relative to said transfer member and the transfer member may include safety drive means adapted to move the transfer member once the spreading means have been put in place. in action.

Une partie dudit élément allongé pourra s'appliquer contre une partie dudit organe de transfert, et l'élément de renfort pourra entraîner en mouvement ledit organe de transfert.A part of said elongated element may be applied against a part of said transfer member, and the reinforcing element may cause said transfer member to move.

La substance thermostabilisable pourra être une résine thermodurcissable.The thermostable substance may be a thermosetting resin.

L'organe de transfert pourra comprendre au moins un cylindre de révolution.The transfer member may include at least one cylinder of revolution.

Le poste d'alimentation pourra comporter un bac où se trouve ladite substance et l'organe de transfert pourra plonger dans ledit bac.The feed station may include a tank where said substance is located and the transfer member may immerse in said tank.

Le poste d'alimentation pourra comporter un bac où se trouve la substance et un organe de circulation adapté à prélever la substance située dans le bac, à l'acheminer vers l'organe de transfert et à enduire correctement ce dernier avec celle-ci.The feed station may include a container where the substance is located and a circulation device adapted to take the substance located in the container, to route it to the transfer member and to properly coat the latter with the latter.

Le dispositif pourra comporter des moyens d'espacement adaptés à écarter du poste d'alimentation l'organe de transfert.The device may include spacing means adapted to separate the transfer member from the supply station.

L'invention fournit également une méthode d'imprégnation d'un élément de renfort par transfert de substance thermostabilisable depuis un poste d'alimentation de la substance jusqu'audit élément à imprégner au moyen d'un organe de transfert ayant une surface mobile sur laquelle est déposée ladite substance. Cette méthode est notamment caractérisée en ce qu'on maintient la température de la surface sensiblement supérieure à celle du poste.The invention also provides a method of impregnating a reinforcing element by transfer of heat-stabilizable substance from a substance supply station up to said element to be impregnated by means of a transfer member having a movable surface on which is deposited said substance. This method is particularly characterized in that the surface temperature is maintained substantially higher than that of the station.

La présente invention sera mieux comprise et ses avantages apparaîtront plus nettement à la lecture de la description qui suit, relative, mais non exclusivement, à l'imprégnation d'éléments allongés de renfort par une substance thermodurcissable et illustrée par les deux figures annexées illustrant deux modes de réalisation possibles du dispositif selon l'invention.The present invention will be better understood and its advantages will appear more clearly on reading the description which follows, relating, but not exclusively, to the impregnation of elongate reinforcing elements with a thermosetting substance and illustrated by the two appended figures illustrating two possible embodiments of the device according to the invention.

Sur cette figure 1, l'élément allongé 1 est, par exemple, composé d'un ensemble d'une ou plusieurs mèches de filaments de renfort placées parallèlement selon leur axe longitudinal et sensiblement dans le même plan. Cet élément allongé 1 s'appuie sur deux rouleaux préparateurs ou ouvreurs 2, de diamètres, d'espacement et de disposition transversale adaptés à la nature et aux dimensions des mèches pour produire éventuellement une rupture du liant qui agglomère les fils de renfort et ainsi permettre l'ouverture des mèches.In this FIG. 1, the elongated element 1 is, for example, composed of a set of one or more strands of reinforcing filaments placed parallel along their longitudinal axis and substantially in the same plan. This elongate element 1 is supported on two preparer rollers or openers 2, of diameters, spacing and transverse arrangement adapted to the nature and dimensions of the wicks to possibly produce a rupture of the binder which agglomerates the reinforcing threads and thus allow opening the wicks.

Après avoir traversé la zone des rouleaux préparateurs, pouvant être limités à un seul, l'élément allongé 1 vient d'abord s'appliquer sur l'organe de transfert 3 pour subir l'imprégnation d'une quantité définie de substance thermodurcissable, puis s'écarter dudit organe de transfert 3 pour subir un trancanage ou être directement utilisé, par exemple, pour la fabrication en continu d'armures en matériau composite, notamment les armures que comporte un tube renforcé, ou la fabrication d'un tube ou d'un objet par enroulement filamentaire.After having crossed the zone of the preparatory rollers, which can be limited to one, the elongated element 1 is first applied to the transfer member 3 to undergo the impregnation of a defined quantity of thermosetting substance, then move away from said transfer member 3 to undergo cutting or be used directly, for example, for the continuous manufacture of armor made of composite material, in particular the armor made up of a reinforced tube, or the manufacture of a tube or 'an object by filament winding.

Sur la figure 1, l'élément allongé 1 s'applique sur l'organe de transfert 3, mais il pourrait aussi ne pas s'y appliquer et passer à son voisinage, le transfert de matière s'effectuant par projection centrifuge, électrostatique ou fluidique, par exemple. Cependant, la configuration décrite est simple et très efficace.In FIG. 1, the elongated element 1 is applied to the transfer member 3, but it could also not apply to it and pass to its vicinity, the material transfer being effected by centrifugal, electrostatic or fluidics, for example. However, the configuration described is simple and very effective.

L'organe de transfert 3 comporte un tambour cylindrique de section circulaire qui tourne autour d'un axe 4 et est entraîné par l'intermédiaire de l'élément allongé 1, dont l'entraînement est obligatoire. On pourrait aussi motoriser le tambour de l'organe de transfert 3, mais l'expérience montre qu'un nombre réduit de mèches, en contact avec une portion réduite du tambour, dispense de l'usage d'un moteur spécifique.The transfer member 3 comprises a cylindrical drum of circular section which rotates around an axis 4 and is driven by the intermediary of the elongated element 1, the drive of which is compulsory. One could also motorize the drum of the transfer member 3, but experience shows that a reduced number of wicks, in contact with a reduced portion of the drum, dispenses with the use of a specific motor.

L'organe de transfert 3 pourrait aussi comporter une bande transporteuse souple montée sur des rouleaux.The transfer member 3 could also include a flexible conveyor belt mounted on rollers.

Au voisinage de sa surface extérieure mobile entrant en contact avec l'élément allongé, l'intérieur de l'organe de transfert 3 est garni de moyens de réchauffage 5, par résistance électrique, air chaud ou fluide caloporteur, etc, adaptés à maintenir une température élevée de manière que la substance, qui se comporte à cette température comme un fluide, ait sa viscosité la plus faible possible et imprègne en profondeur l'élément allongé 1, sans inclusion d'air, suffisamment et sans excès de substance.In the vicinity of its movable outer surface coming into contact with the elongated element, the interior of the transfer member 3 is lined with heating means 5, by electrical resistance, hot air or heat transfer fluid, etc., adapted to maintain a high temperature so that the substance, which behaves at this temperature like a fluid, has its lowest possible viscosity and permeates in depth the elongate element 1, without inclusion of air, sufficiently and without excess of substance.

Les essais, réalisés avec un organe de transfert 3 de 50 cm de largeur et 30 cm de diamètre et avec une résine thermodurcissable comme substance d'imprégnation, montrent que selon la vitesse de production, la température à la surface de l'organe de transfert au niveau de la zone d'imprégnation peut être comprise, par exemple, entre 70 et 140°C selon la vitesse d'imprégnation de l'élément allongé et la température du poste d'alimentation 7 comprise entre 7 et 25°C suivant la température de l'eau servant au refroidissement.The tests, carried out with a transfer member 3 50 cm wide and 30 cm in diameter and with a thermosetting resin as impregnating substance, show that, depending on the speed of production, the temperature on the surface of the transfer member at the level of the impregnation zone can be comprised, for example, between 70 and 140 ° C. depending on the impregnation speed of the elongated element and the temperature of the supply station 7 comprised between 7 and 25 ° C. depending on the temperature of the water used for cooling.

Pour ces essais, la résine thermodurcissable était composée de 100 parties de diglycidyléther du bisphénol A (base), 90 parties d'anhydride interne de l'acide 2.3 dicarboxylique, 1,5 norbonène, X méthyl (durcisseur) et de 2 parties de benzyldiméthylamine (accélérateur).For these tests, the thermosetting resin was composed of 100 parts of diglycidyl ether of bisphenol A (base), 90 parts of internal anhydride of 2.3 dicarboxylic acid, 1.5 norbonene, X methyl (hardener) and of 2 parts of benzyldimethylamine (accelerator).

D'une manière générale, la température du poste d'alimentation 7 est adaptée de manière à limiter l'évolution chimique de la substance contenue dans le poste d'alimentation et d'autre part, à assurer l'alimentation convenable de l'organe de transfert 3.In general, the temperature of the feed station 7 is adapted so as to limit the chemical evolution of the substance contained in the feed station and on the other hand, to ensure the proper supply of the organ transfer 3.

De même, la température de l'organe de transfert 3 est adaptée de manière que la viscosité de la substance d'imprégnation, soit la plus faible nécessaire au niveau de la zone d'imprégnation pour permettre une imprégnation correcte des éléments allongés 1 et que l'évolution chimique de la substance sur l'organe de transfert soit minimale.Likewise, the temperature of the transfer member 3 is adapted so that the viscosity of the impregnation substance is the lowest necessary at the level of the impregnation zone to allow correct impregnation of the elongated elements 1 and that the chemical evolution of the substance on the transfer organ is minimal.

Par exemple, une résine thermodurcissable doit rester fusible ou fondue dans le dispositif.For example, a thermosetting resin must remain fusible or melted in the device.

Alors que la zone d'imprégnation 6 de l'élément allongé 1 est située dans la partie supérieure de l'organe de transfert 3, le poste d'alimentation 7 de substance thermodurcissable 8 est situé dans la partie inférieure dudit organe 3, de manière que le poste d'alimentation puisse comporter avantageusement un bac 9 où se trouve la substance 8.While the impregnation zone 6 of the elongate element 1 is located in the upper part of the transfer member 3, the supply station 7 of thermosetting substance 8 is located in the lower part of said member 3, so that the feed station can advantageously include a tray 9 where the substance 8 is located.

Pour éviter l'échauffement de la substance 8 contenue dans le bac 9 du fait du chauffage de l'organe de transfert 3, le bac 9 comporte des moyens de refroidissement 10, tels un serpentin de refroidissement à eau courante, ou un échangeur relié à un groupe frigorifique, ou encore des ailettes de refroidissement éventuellement placées dans un courant d'air forcé.To avoid overheating of the substance 8 contained in the tank 9 due to the heating of the transfer member 3, the tank 9 comprises cooling means 10, such as a cooling coil with running water, or an exchanger connected to a refrigeration unit, or alternatively cooling fins possibly placed in a forced air stream.

L'échauffement du bac 9 est dû à la chaleur provenant de l'organe de transfert 3, soit directement par le contact avec la substance 8, soit par la substance qui a été déposée sur l'organe de transfert 3 au niveau du poste d'alimentation 7, qui n'a pas été enlevée lors de l'imprégnation de l'élément allongé 1 et qui est dégagée de la surface de l'organe de transfert 3, soit après l'imprégnation et en amont du poste d'alimentation 7, par un organe essoreur 11, soit en aval du poste d'alimentation par des racloirs 14.The heating of the tank 9 is due to the heat coming from the transfer member 3, either directly by contact with the substance 8, or by the substance which has been deposited on the transfer member 3 at the station d 'feed 7, which was not removed during the impregnation of the elongated element 1 and which is released from the surface of the transfer member 3, either after the impregnation and upstream of the feed station 7, by a wringer 11, either downstream of the feed station by scrapers 14.

L'amont d'un point considéré est la zone qu'un élément de matière parcourt au cours du processus technique avant d'aboutir au point considéré, alors qu'au contraire l'aval est la zone qui est atteinte après le point considéré.The upstream of a point considered is the area that an element of matter traverses during the technical process before arriving at the point considered, whereas on the contrary the downstream is the area which is reached after the point considered.

Le refroidissement permet de maintenir le poste d'alimentation 7 par exemple à la température de 20°C, de manière à ralentir la gélification de la résine ou d'une manière générale, l'évolution de la substance d'imprégnation.The cooling makes it possible to maintain the feeding station 7 for example at the temperature of 20 ° C., so as to slow down the gelling of the resin or, in general, the evolution of the impregnation substance.

La substance éliminée par l'organe essoreur 11 est renvoyée dans une zone froide du bac 9 grâce à une cloison séparatrice 12, de manière à stopper le plus rapidement possible l'évolution de la substance enlevée. Cependant, on pourra aussi renvoyer la substance éliminée en la répartissant au voisinage de l'organe de transfert 3, de manière que la substance soit rapidement consommée par l'imprégnation.The substance eliminated by the wringer 11 is returned to a cold zone of the tank 9 thanks to a separating partition 12, so as to stop as quickly as possible the evolution of the substance removed. However, it is also possible to return the eliminated substance by distributing it in the vicinity of the transfer member 3, so that the substance is rapidly consumed by the impregnation.

Par ce procédé, on évite à la substance de stagner sur des parties de la surface de l'organe de transfert 3 quine sont pas dépourvues de substance par l'imprégnation de l'élément allongé 1.By this method, the substance is prevented from stagnating on parts of the surface of the transfer member 3 which are not devoid of substance by the impregnation of the elongated element 1.

Un enlèvement de la substance chauffée, son mélange avec de la substance fraîche contenue dans le bac 9, puis la répartition du mélange sur toute la surface chauffée de l'organe de transfert permet notamment de réaliser des économies d'énergie en épargnant à la substance chauffée d'être refroidie avant d'être réchauffée un certain nombre de fois. Toutefois, ce recyclage rapide s'effectue au détriment d'un effet de trempe qui atténue l'évolution de la substance.Removing the heated substance, mixing it with fresh substance contained in the tank 9, then distributing the mixture over the entire heated surface of the transfer member makes it possible in particular to achieve energy savings by saving the substance heated to be cooled before being reheated a number of times. However, this rapid recycling takes place at the expense of a quenching effect which attenuates the evolution of the substance.

Grâce à cet organe essoreur 11, on évite toute stagnation de substance chaude, telle qu'une résine, tournant en rond entre les mèches et risquant de gélifier à la surface de l'organe de transfert.Thanks to this wringer 11, any stagnation of hot substance, such as a resin, is avoided, rotating in circles between the locks and risking gelling on the surface of the transfer member.

En aval du poste d'alimentation 7 est disposé un élément doseur 13 permettant d'uniformiser et de régler en épaisseur la couche de substance dont l'organe de transfert 3 s'est recouvert en passant dans le poste d'alimentation 7. L'excès de substance revient ensuite vers le poste 7.Downstream of the feed station 7 is arranged a metering element 13 making it possible to standardize and adjust the thickness of the layer of substance with which the transfer member 3 is covered while passing through the feed station 7. The excess substance then returns to station 7.

L'épaisseur de la couche est réglée de telle sorte que les mèches constituant l'élément allongé 1 sont correctement (ni pas assez, ni trop) imprégnées.The thickness of the layer is adjusted so that the wicks constituting the elongate element 1 are correctly (not enough, not too much) impregnated.

Sensiblement au même niveau que l'élément doseur, se trouvent sur chacun des flasques de l'organe de transfert 3, deux racloirs 14 éliminant des flasques la substance et permettant alors le transfert de cette substance vers une zone refroidie du bac 9.About the same level as the metering element, are on each of the flanges of the transfer member 3, two scrapers 14 eliminating the substance from the flanges and then allowing the transfer of this substance to a cooled zone of the tank 9.

Le bac d'alimentation 9 pourra se conformer à la géométrie de l'organe de transfert 3, de manière à réduire la quantité de substance située dans le bac et réchauffée par l'organe 3. Une épaisseur de substance entre le fond du bac 9 et l'organe 3 de 5 à 30 mm est satisfaisante. Cette disposition nécessite toutefois une réalimentation du bac en résine fraîche plus fréquente que lorsque le bac est plus grand.The feed tank 9 can conform to the geometry of the transfer member 3, so as to reduce the amount of substance located in the tank and heated by the member 3. A thickness of substance between the bottom of the tank 9 and the member 3 from 5 to 30 mm is satisfactory. However, this arrangement requires refilling the tank with fresh resin more frequently than when the tank is larger.

En utilisant des moyens de refroidissement 10 adaptés, ou en profitant de la mauvaise conductibilité thermique de la substance, on pourra accroître le volume du bac.By using suitable cooling means 10, or by taking advantage of the poor thermal conductivity of the substance, the volume of the tank can be increased.

Pour éviter que, lors d'un arrêt de l'organe de transfert 3, la résine imprégnant l'élément allongé 1 n'évolue sous l'action de la chaleur, le dispositif comporte des moyens d'écartement entre l'élément allongé 1 et ledit organe 3.To avoid that, when the transfer member 3 stops, the resin impregnating the elongated element 1 does not evolve under the action of heat, the device comprises spacing means between the elongated element 1 and said organ 3.

Ces moyens peuvent être composés d'un rouleau 16 actionné par un bras mobile 17 en cas d'arrêt. Le rouleau étant initialement situé entre les mèches 1 et l'organe de transfert 3, aboutit alors à la position 18 mentionnée en pointillés.These means can be composed of a roller 16 actuated by a movable arm 17 in the event of a stop. The roller being initially located between the wicks 1 and the transfer member 3, then leads to the position 18 mentioned in dotted lines.

De même, lorsqu'on arrête la production de mèches imprégnées, les mêmes moyens pourront être utilisés pour écarter les mèches 1 de l'organe de transfert 3. Dans ce cas, un organe d'entraînement de sécurité 19 permettra de maintenir l'organe 3 en rotation si celui-ci ne possède pas de motorisation indépendante.Similarly, when the production of impregnated wicks is stopped, the same means can be used to separate the wicks 1 from the transfer member 3. In this case, a safety drive member 19 will make it possible to maintain the member 3 in rotation if it does not have an independent motorization.

Grâce au dispositif, on peut obtenir des cadences de fabrication très variables avec une production de mèches imprégnées de 0,2 m/min à 100 m/min et préférentiellement de 2 m/min à 25 m/min, sans risque de gélification de l'organe de transfert et du poste d'alimentation. De plus, la qualité de l'imprégnation, est accrue par la bonne pénétration de la résine dans l'élément allongé.Thanks to the device, very variable production rates can be obtained with a production of impregnated wicks from 0.2 m / min to 100 m / min and preferably from 2 m / min to 25 m / min, without risk of gelling of the transfer member and the feeding station. In addition, the quality of the impregnation is increased by the good penetration of the resin into the elongated element.

On pourra aussi motoriser l'organe de transfert et faire circuler l'élément allongé dans un sens opposé à celui dudit organe.We can also motorize the transfer member and circulate the elongated element in a direction opposite to that of said member.

La figure 2 illustre une variante du mode de réalisation selon l'invention illustré à la figure 1. Les éléments similaires des figures 1 et 2 sont désignés par les mêmes références numériques.Figure 2 illustrates a variant of the embodiment according to the invention illustrated in Figure 1. The similar elements of Figures 1 and 2 are designated by the same reference numerals.

La différence entre les modes de réalisation des figures 1 et 2 réside en ce que le poste d'alimentation 7 comporte un organe de circulation 21 de forme cylindrique tournant autour d'un axe fixe 22 et prélevant sur sa périphérie la substance d'imprégnation par un plongement de cet organe 21 dans le bac 9 rempli de substance.The difference between the embodiments of FIGS. 1 and 2 resides in that the supply station 7 comprises a circulation member 21 of cylindrical shape rotating around a fixed axis 22 and taking from its periphery the impregnation substance by an immersion of this member 21 in the tank 9 filled with substance.

La substance prélevée par l'organe de circulation 21 est acheminée par rotation de l'organe 21 vers l'organe de transfert 3 qui s'enduit alors de celle-ci. L'espace entre l'organe de transfert 3 et l'organe de circulation 21 est adapté à permettre la bonne enduction de ce dernier.The substance removed by the circulation member 21 is routed by rotation from the member 21 to the transfer member 3 which then coats therewith. The space between the transfer member 3 and the circulation member 21 is adapted to allow good coating of the latter.

Un train d'engrenages (non représenté), protégé des projections éventuelles de la substance, assure une synchronisation entre l'organe de transfert 3 et l'organe de circulation 21, de manière à assurer une enduction correcte de l'organe de transfert et une imprégnation correcte. La hauteur de denture de ces engrenages peut être telle que l'entraînement de l'organe de circulation 21 est possible lorsque, par des moyens d'espacement 23, on espace les organes de transfert 3 et de circulation 21, par exemple pour un arrêt de l'avancement des éléments allongés 1, une fois que les moyens d'écartement 16, 17 et l'organe d'entraînement de sécurité 19 de l'organe de transfert 3 ont été mis en action. L'espacement produit permet d'essorer complétement l'organe de transfert 3 et d'éviter à la substance s'y trouvant de subir une évolution chimique.A gear train (not shown), protected from any projections of the substance, ensures synchronization between the transfer member 3 and the circulation member 21, so as to ensure correct coating of the transfer member and correct impregnation. The toothing height of these gears can be such that the drive of the circulation member 21 is possible when, by spacing means 23, the transfer members 3 and the circulation members 21 are spaced, for example for stopping advancement of the elongated elements 1, once the spacing means 16, 17 and the safety drive member 19 of the transfer member 3 have been put into action. Product spacing allows the organ to be completely wrung out transfer 3 and to prevent the substance therein from undergoing a chemical evolution.

Pour assurer l'entraînement correct de l'organe de circulation 21, on pourra aussi recourir à un moteur supplémentaire placé au niveau de l'axe 22 et entraînant l'organe 21.To ensure the correct drive of the circulation member 21, it is also possible to use an additional motor placed at the level of the axis 22 and driving the member 21.

Le poste d'alimentation comporte deux racloirs 24 éliminant des flasques de l'organe de circulation 21, la substance d'imprégnation. Ces racloirs sont avantageusement disposés juste en amont du prélèvement de la substance par l'organe 21, de manière à assurer le meilleur refroidissement possible de ce dernier et le renouvellement de la substance située sur ses flasques.The feeding station includes two scrapers 24 eliminating the flanges of the circulation member 21, the impregnation substance. These scrapers are advantageously arranged just upstream of the substance 21 being removed by the member 21, so as to ensure the best possible cooling of the latter and the renewal of the substance located on its flanges.

Un protecteur 25 placé à l'extrémité du racloir 24 situé vers l'axe 22 empêche que des projections de résine n'entravent la rotation de l'organe 21.A protector 25 placed at the end of the scraper 24 situated towards the axis 22 prevents that projections of resin impede the rotation of the member 21.

L'organe essoreur 11 de l'organe de transfert 3, qui dans le mode de réalisation précédent déversait la substance au-delà d'une cloison séparatrice 12, laisse choir la substance directement dans le bac 9.The wringer 11 of the transfer member 3, which in the previous embodiment poured the substance beyond a separating partition 12, lets the substance fall directly into the tank 9.

Etant donné que dans le deuxième mode de réalisation, les flasques de l'organe de transfert 3 sont recouvert de substance sur une zone périphérique plus restreinte que dans le premier mode (Fig. 1), la longueur des racloirs 14 peut en être réduite.Since in the second embodiment, the flanges of the transfer member 3 are covered with substance over a more restricted peripheral area than in the first embodiment (Fig. 1), the length of the scrapers 14 can be reduced.

Dans le premier mode de réalisation selon l'invention, on pourra aussi utiliser un organe d'espacement entre l'organe de transfert et le poste d'imprégnation, de manière à pouvoir essorer complètement l'organe de transfert 3.In the first embodiment according to the invention, it is also possible to use a spacer member between the transfer member and the impregnation station, so as to be able to completely wring out the transfer member 3.

Pour certains types de produits et de conditions d'imprégnation, il est possible d'adjoindre au dispositif, au niveau de la zone d'imprégnation, un panneau radiant, de manière à augmenter localement la température de la substance pour améliorer l'imprégnation des mèches.For certain types of products and impregnation conditions, it is possible to add to the device, at the zone level impregnation, a radiant panel, so as to locally increase the temperature of the substance to improve the impregnation of the wicks.

On pourra aussi procéder à l'enduction de l'organe de transfert par la fusion d'un bloc de substance placée à une température suffisante pour qu'elle soit solide. La substance essorée par l'organe essoreur pourra alors, par exemple, être directement reconduite vers le point de contact du bloc et de l'organe de transfert.It is also possible to coat the transfer member by melting a block of substance placed at a temperature sufficient for it to be solid. The substance wrung out by the wringing member can then, for example, be taken directly to the point of contact of the block and of the transfer member.

Le poste d'alimentation comportera de ce fait des moyens spécifiques permettant d'assurer le contact du bloc et de l'organe de transfert.The feed station will therefore include specific means to ensure contact with the block and the transfer member.

Claims (13)

1. Device for impregnating at least one elongate element (1) by the transfer of thermostabilisable substance (8) from a substance supply station (7) to the element (1) by a transfer means (3), wherein the element (1) is moved longitudinally in front of the transfer means (3), wherein the transfer means (3) comprises a moving surface passing into the supply station (7) and then in front of the element (1), the substance (8) being deposited on the moving surface at the level of the supply station (7) and being transferred at least in part onto the element in an area adjacent to the element, wherein the transfer means comprises thermal regulation means, such as heating (5), characterised in that the thermal regulation means are adapted so that the surface temperature at the level of the impregnating area (6) is considerably higher than the temperature of the substance in the supply station.
2. Device in accordance with claim 1, characterised in that the supply station (7) comprises thermal regulation means, such as cooling means (10), adapted so that the temperature of the substance in the supply station (7) is considerably lower than the surface temperature at the level of the impregnation area.
3. Device in accordance with one of claims 1 or 2, characterised in that it comprises a wiper (11) adapted to remove from the surface any substance not picked up by the element, the wiper (11) being located upstream of the supply station (7).
4. Device in accordance with one of claims 1 to 3, characterised in that it comprises a skimming means (13) located downstream of the supply station (7), the skimming element (13) being adapted to produce on the surface a uniform layer of substance of regulated thickness.
5. Device in accordance with one of claims 1 to 4, characterised in that it comprises at least one roller (2) to prepare the element to be impregnated, located upstream of the area (5) where the element is impregnated.
6. Device in accordance with one of claims 1 to 5, characterised in that it comprises a means for lifting (16, 17) the elongate element away from the transfer means (3) and in that the transfer means (3) comprises safety drive means (19) adapted to move the transfer means (3) once the lifting means (16, 17) are activated.
7. Device in accordance with one of claims 1 to 6, characterised in that a part of the elongate element (1) is applied against a part of the transfer means (3) and in that the reinforcing element sets the transfer means (3) in motion.
8. Device in accordance with one of claims 1 to 7, characterised in that the thermostabilisable substance is a thermosetting resin.
9. Device in accordance with one of claims 1 to 8, characterised in that the transfer means (3) is a rotating cylinder.
10. Device in accordance with one of claims 1 to 9, characterised in that the supply station (7) comprises a tank (9) in which the substance (8) is placed and in that the transfer means (3) is immersed in the tank.
11. Device in accordance with one of claims 1 to 9, characterised in that the supply station (Fig. 2) comprises a tank (9) in which the substance (8) is located, and a rotation means (21) adapted to pick up the substance located in the tank (9), transfer it to the transfer means and coat this means correctly with the substance.
12. Device in accordance with one of claims 1 to 11, characterised in that it comprises a spacing means (23) adapted to move the transfer means (3) from the supply station (7).
13. A method of impregnating a reinforcing element by transferring thermostabilisable substance from a substance supply station (7) to the element to be impregnated (1), by means of a transfer means (3) with a moving surface on which the substance is deposited, characterised in that the temperature of the surface is maintained at a level considerably higher than that of the supply station.
EP88400545A 1987-03-09 1988-03-08 Method and device for impregnating an elongated element Expired - Lifetime EP0282410B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703295 1987-03-09
FR8703295A FR2612086B1 (en) 1987-03-09 1987-03-09 METHOD AND DEVICE FOR IMPREGNATION OF AN ELONGATED ELEMENT

Publications (3)

Publication Number Publication Date
EP0282410A2 EP0282410A2 (en) 1988-09-14
EP0282410A3 EP0282410A3 (en) 1989-09-27
EP0282410B1 true EP0282410B1 (en) 1991-11-06

Family

ID=9348829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400545A Expired - Lifetime EP0282410B1 (en) 1987-03-09 1988-03-08 Method and device for impregnating an elongated element

Country Status (7)

Country Link
US (1) US4932352A (en)
EP (1) EP0282410B1 (en)
JP (1) JPH0819617B2 (en)
BR (1) BR8801036A (en)
DE (1) DE3865987D1 (en)
FR (1) FR2612086B1 (en)
NO (1) NO174695C (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH684813B5 (en) * 1990-01-11 1995-07-14 Benninger Ag Maschf An apparatus for continuously applying a liquid to a textile web.
US5435872A (en) * 1991-11-01 1995-07-25 Decc Technology Partnership Sized coated pistons
US5435873A (en) * 1991-11-01 1995-07-25 Decc Technology Partnership, A Limited Partnership Of Which The Decc Company, Inc. Is A General Partner Method and apparatus for sizing a piston
US5266142A (en) * 1991-11-01 1993-11-30 Decc Technology Partnership A Limited Partnership Coated piston and method and apparatus of coating the same
US5552012A (en) * 1994-09-09 1996-09-03 Kimberly-Clark Corporation Placement of electric-field-responsive material onto a substrate
EP0769582B1 (en) * 1995-10-10 1998-06-10 Chimitex S.A.R.L. Warp sizing device
FR2744040B1 (en) * 1996-01-26 1998-04-10 Inst Francais Du Petrole METHOD AND DEVICE FOR IMPROVING THE IMPREGNATION OF THREADS FOR COMPOSITE MATERIAL
US6495267B1 (en) 2001-10-04 2002-12-17 Briggs & Stratton Corporation Anodized magnesium or magnesium alloy piston and method for manufacturing the same
ITVR20130210A1 (en) * 2013-09-05 2015-03-06 Albert Zandonai MACHINE FOR THE TRANSFER OF FLUIDS TO A TAPE AND ASSOCIATED OPERATING METHOD

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Publication number Priority date Publication date Assignee Title
GB956746A (en) * 1962-08-29 1964-04-29 Nikex Nehezipari Kulkere Process and apparatus for the continuous production of bands impregnated and/or coated with synthetic resin
FR1348641A (en) * 1962-12-21 1964-01-10 Thomson Houston Comp Francaise Method and installation for making thin coatings
FR2055918A5 (en) * 1969-08-07 1971-05-14 Tunzini
CH465970A4 (en) * 1970-03-26 1972-04-14
DE2213974C2 (en) * 1972-03-22 1975-01-23 Bostik Gmbh, 6370 Oberursel Device for the mechanical bonding of workpieces by means of a hot melt adhesive
US3788271A (en) * 1972-04-14 1974-01-29 Perma Glas Mesh Corp Apparatus for applying pressure sensitive adhesive to glass fiber mesh material
GB1434799A (en) * 1972-09-25 1976-05-05 Beloit Corp Apparatus and method for applying glue from a roller
FR2358205A1 (en) * 1976-07-13 1978-02-10 Mecalix Enduction Corrugated cardboard sheet web impregnating drum - has baffles in distributor bath and adjustable feed and delivery rollers
EP0146555A1 (en) * 1983-05-06 1985-07-03 Brooks Electrofoil Seaming Systems Pty. Ltd. Adhesive tape producing/dispensing apparatus

Also Published As

Publication number Publication date
NO174695C (en) 1994-06-22
JPS63243362A (en) 1988-10-11
DE3865987D1 (en) 1991-12-12
US4932352A (en) 1990-06-12
JPH0819617B2 (en) 1996-02-28
EP0282410A3 (en) 1989-09-27
FR2612086B1 (en) 1989-08-18
NO881004L (en) 1988-09-12
NO881004D0 (en) 1988-03-07
BR8801036A (en) 1988-10-18
EP0282410A2 (en) 1988-09-14
NO174695B (en) 1994-03-14
FR2612086A1 (en) 1988-09-16

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