EP0875299A1 - Coating line for a conductive wire - Google Patents

Coating line for a conductive wire Download PDF

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Publication number
EP0875299A1
EP0875299A1 EP98401065A EP98401065A EP0875299A1 EP 0875299 A1 EP0875299 A1 EP 0875299A1 EP 98401065 A EP98401065 A EP 98401065A EP 98401065 A EP98401065 A EP 98401065A EP 0875299 A1 EP0875299 A1 EP 0875299A1
Authority
EP
European Patent Office
Prior art keywords
wire
line according
enameling
oven
varnish
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98401065A
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German (de)
French (fr)
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EP0875299B1 (en
Inventor
Pierre-Yves Le Tiec
Raymond Andre
Michel Debray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans SA
Original Assignee
Alcatel SA
Alcatel Alsthom Compagnie Generale dElectricite
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Publication of EP0875299A1 publication Critical patent/EP0875299A1/en
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Publication of EP0875299B1 publication Critical patent/EP0875299B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B05D3/0272—After-treatment with ovens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/001—Drying and oxidising yarns, ribbons or the like
    • F26B13/002—Drying coated, e.g. enamelled, varnished, wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas

Definitions

  • the present invention relates to an enameling line a conducting wire, comprising a varnish applicator on the wire and an enameling oven through which the wire.
  • US-A-5,291,670 discloses an oven for enamelling conductive wires coated with a layer of resin (or varnish) dissolved in solvents.
  • This oven has a horizontal and shaped main bedroom elongated, an auxiliary suction and treatment of solvent vapors from the chamber main and a hot air convection system in this one.
  • the main chamber of this oven is divided into a solvent evaporation zone of the resin layer on the wires and a polymerization and crosslinking zone of resin. It is equipped with a horizontal row of electrical resistors, which are mounted inside this chamber, and heat exchangers, which define two of the opposite longitudinal walls of said chamber main.
  • the auxiliary assembly includes suction means to suck in a stream of air and solvent vapors from the master bedroom, between the two areas thereof. he also includes heating means to process this flow sucked. It is coupled to one end of the exchangers for their hot air supply provided by the flow treaty.
  • the hot air convection system has a pipe which couples the other end of the exchangers at one end of the master bedroom. It thus ensures recycling of the treated stream, which is reintroduced into the master bedroom after circulating in the heat exchangers along said chamber.
  • the solvent evaporation zone is maintained between 150 and 350 ° C and the polymerization and crosslinking zone of resin between 400 and 550 ° C.
  • the flow drawn from this room main is treated at a temperature of around 700 to 750 ° C in the auxiliary assembly.
  • Each of the two the master bedroom is kept at the desired temperature by the thermal contribution of electrical resistances interior but also mainly exchangers as well as the convection system.
  • This enameling oven makes the most of the exchange thermal between the treated air and solvent flow and the enameled wires. It is however of complex structure and cumbersome.
  • Document JP-A-01 11671 discloses a set of baking a layer of resin (or varnish) on a wire metallic, comprising two heating ovens which are mounted one after the other and in which the wire coated with its resin layer.
  • the first oven of heating is by air circulation. It ensures evaporation of most solvents in the resin layer on the wire and maintains the crosslinking of the resin to a degree insufficient, with oxidation of the resin and the remaining wire below a certain degree.
  • the second heating oven ensures the crosslinking of the resin at high temperature, of the order of 500 ° C. and is provided for an interior atmosphere having a low oxygen content, less than 5%, to make obstacle to the oxidation of the resin and the wire.
  • This set glazing requires a vapor treatment unit of solvents from the first heating oven, if you want avoid pollution problems.
  • the object of the present invention is to avoid the drawbacks of the aforementioned known solutions. It relates to a line for enamelling a conductive wire, comprising at least one assembly comprising a varnish applicator on the wire and an enameling oven in which said wire runs, said oven itself comprising on the one hand at least one elongated chamber, provided with a wire inlet and a wire outlet at its two opposite ends and fitted internally with radiant heating elements facing the path of the wire between said inlet and said wire outlet , for the evaporation of solvents from said varnish on the wire and / or the firing of the varnish on the wire, and on the other hand means for treating solvent vapors coming from the resin on the wire, characterized in that the oven enameling includes a single chamber whose interior atmosphere is low oxygen content controlled and less than 6%, to both ensure the evaporation of solvents and the firing of said varnish on said wire and constitute said hubs ns treatment of said solvent vapors by combustion in contact with said radiant heating elements in said single chamber, without flame resulting therefrom
  • This single figure is a sectional view of a line enamelling according to the invention.
  • This enamelling line includes an applicator varnish 1 and an enameling oven 2 mounted following the applicator and coupled to it, through which the common thread 3 runs horizontally in the realization illustrated.
  • the line can be arranged vertically.
  • the varnish applicator contains the dissolved varnish in solvents for the deposition of a layer of this varnish on the thread running through the applicator.
  • the enameling oven 2 has a single chamber 4 for the evaporation of the solvents from the varnish layer on wire, solvent vapor treatment and baking at high temperature of the varnish on the wire, progressively of the thread running through this room. He is in shape elongated and of uniform rectangular section over its entire length and maintained on a support base 20.
  • This oven 2 has an inlet 5 and an outlet 6 for the wire in the room, provided at its opposite ends. It is fitted with radiant heating elements 7, mounted in the chamber 4 opposite the path of the wire therein. As illustrated, these elements are worn and line internally the upper longitudinal wall 8 of the bedroom but can just as easily be on another of the longitudinal walls of this oven. These are resistances electrics advantageously chosen to allow bring room 4 to a temperature of the order or higher than 1000 ° C. Such electrical resistances are as such known, of the type already used especially in the automotive field for cooking painting.
  • One of the other longitudinal walls of the oven here its lower wall, preferably consists of a wall double marked 9A and 9B.
  • This room 4 has an indoor atmosphere with very low oxygen content, less than 6% and preferably around 3%, which is controlled. She is equipped with a probe 10 for measuring the oxygen content of the interior atmosphere of room 4. An entrance controlled air 11 is slaved to the measurement probe and maintains the oxygen content in the chamber its desired low value.
  • the measurement probe 10 is mounted near the wire path 3.
  • the controlled air inlet 11 is preference distant from it. It leads into a supply conduit 12 extending along the chamber and opening at its two ends in the parts opposite terminals of entry and exit of the room.
  • the controlled air inlet 11 is produced through this bottom wall of the oven, especially in the part central part of it, or between the central part and the entry terminal part or even at party right entry.
  • the supply duct 12 is advantageously defined between the two walls 9A and 9B of the lower wall double oven.
  • the measurement probe 10 is mounted in the terminal outlet part of the chamber 4.
  • a fan 13 is mounted to the right of the entrance controlled air 11 in the supply duct 12, for an air circulation introduced by this entry in a direction and the other towards its ends and in room 4, as illustrated by the opposite arrows 12A and 12B as well than 4A and 4B. It mixes the air flow introduced with the flow of air and vapors present in room 4.
  • the probe measurement signal regulates the air flow which is introduced into conduit 12 and so into the chamber 4, so that the oxygen content in chamber 4 is weak but remains sufficient for combustion completely flameless solvent vapors in the bedroom.
  • Room 4 is placed in slight depression and is thus sealed to prevent uncontrolled reentry of air other than through controlled input 11.
  • Its input 5 is directly hermetically coupled to the applicator varnish 1 and this one is equipped with an extractor hood 15.
  • Its outlet 6 is connected to a suction pipe 16.
  • One of the ends of this pipe 16 opens onto the periphery from outlet 6 while its other end is coupled with an air supply line 17 to a fan 18 to adjust the suction flow.
  • Exit 6 is also externally equipped with a terminal nozzle low pressure outside air intake as well as illustrated by the arrows 19, which is sucked into the suction pipe 16 but provides the required tightness of the outlet 6 around the wire and gas extraction from combustion.
  • the extractor hood 15 is equipped with a chimney for evacuating intake air and solvent vapors from the applicator.
  • this hood suction is coupled by a discharge pipe 14 to the controlled air inlet 11, for air purification as well then sucked directly into room 4.
  • the extractor hood 15 is controlled by the measuring probe, which controls the flow drawn in by the hood and injected through the inlet 11 in the conduit 12 and the chamber 4.
  • Solvent vapor treatment is therefore carried out directly in the varnish baking chamber 4 on the wire, thus avoiding any problem of external pollution and any other equipment intended for this purpose.
  • the temperature of the room is maintained at 1000 ° C or even higher. She may be uniform over the length of chamber 4. Alternatively, a temperature gradient is created along the chamber, in ascending from entry 5 to exit 6, or preferably going up from the entrance to a part median or near the exit then decreasing from this party at the exit.
  • chamber 4 at one very high temperature and much higher than temperatures known solutions can significantly increase the production speed, at equal oven length. This production speed is at least doubled for a operation of chamber 4 at 1000 ° C.
  • the enamel line can have multiple sets that are analogous to the assembly constituted by the applicator 1 and the oven 2 associated with each other and are then mounted one after the other on the other or others.
  • the oven is built for be able to open halfway and be able to retract by relative to the path of the wire, this allows the start of the line, with the wire out of the oven until it has reaches a sufficient speed to prevent the thread from melts if the chamber is at around 1000 ° C. The oven is then brought back into place on the line and closed on this wire, as soon as the wire speed avoids this problem.

Abstract

In a wire enamelling line having a varnish applicator and a radiant-heated continuous enamelling furnace, the enamelling furnace (2) has a single chamber (4) containing an atmosphere with a controlled oxygen content of less than 6% to provide combined solvent evaporation, varnish baking and flame-less solvent vapour combustion in contact with the radiant heating elements (7) of the furnace.

Description

La présente invention porte sur une ligne d'émaillage d'un fil conducteur, comportant un applicateur de vernis sur le fil et un four d'émaillage à travers lesquels défile le fil.The present invention relates to an enameling line a conducting wire, comprising a varnish applicator on the wire and an enameling oven through which the wire.

Le document US-A-5 291 670 divulgue un four d'émaillage de fils conducteurs revêtus d'une couche de résine (ou vernis) dissoute dans des solvants. Ce four comporte une chambre principale horizontale et de forme allongée, un ensemble auxiliaire d'aspiration et de traitement des vapeurs de solvants provenant de la chambre principale et un système de convection d'air chaud dans celle-ci.US-A-5,291,670 discloses an oven for enamelling conductive wires coated with a layer of resin (or varnish) dissolved in solvents. This oven has a horizontal and shaped main bedroom elongated, an auxiliary suction and treatment of solvent vapors from the chamber main and a hot air convection system in this one.

La chambre principale de ce four est divisée en une zone d'évaporation des solvants de la couche de résine sur les fils et une zone de polymérisation et de réticulation de la résine. Elle est équipée d'une rangée horizontale de résistances électriques, qui sont montées à l'intérieur de cette chambre, et d'échangeurs thermiques, qui définissent deux des parois longitudinales opposées de ladite chambre principale.The main chamber of this oven is divided into a solvent evaporation zone of the resin layer on the wires and a polymerization and crosslinking zone of resin. It is equipped with a horizontal row of electrical resistors, which are mounted inside this chamber, and heat exchangers, which define two of the opposite longitudinal walls of said chamber main.

L'ensemble auxiliaire comporte des moyens d'aspiration pour aspirer un flux d'air et de vapeurs de solvants de la chambre principale, entre les deux zones de celle-ci. Il comporte aussi des moyens de chauffage pour traiter ce flux aspiré. Il est couplé à l'une des extrémités des échangeurs pour leur alimentation en air chaud assurée par le flux traité.The auxiliary assembly includes suction means to suck in a stream of air and solvent vapors from the master bedroom, between the two areas thereof. he also includes heating means to process this flow sucked. It is coupled to one end of the exchangers for their hot air supply provided by the flow treaty.

Le système de convection d'air chaud comporte une conduite qui couple l'autre extrémité des échangeurs thermiques à l'une des extrémités de la chambre principale. Il assure ainsi un recyclage du flux traité, qui est réintroduit dans la chambre principale après avoir circulé dans les échangeurs thermiques le long de ladite chambre.The hot air convection system has a pipe which couples the other end of the exchangers at one end of the master bedroom. It thus ensures recycling of the treated stream, which is reintroduced into the master bedroom after circulating in the heat exchangers along said chamber.

Dans la chambre principale de ce four d'émaillage, la zone d'évaporation des solvants est maintenue entre 150 et 350°C et la zone de polymérisation et réticulation de résine entre 400 et 550°C. Le flux aspiré de cette chambre principale est traité à une température de l'ordre de 700 à 750°C dans l'ensemble auxiliaire. Chacune des deux zones de la chambre principale est maintenue à la température voulue par l'apport thermique des résistances électriques intérieures mais aussi en grande partie des échangeurs thermiques ainsi que du système de convection.In the master bedroom of this enamelling furnace, the solvent evaporation zone is maintained between 150 and 350 ° C and the polymerization and crosslinking zone of resin between 400 and 550 ° C. The flow drawn from this room main is treated at a temperature of around 700 to 750 ° C in the auxiliary assembly. Each of the two the master bedroom is kept at the desired temperature by the thermal contribution of electrical resistances interior but also mainly exchangers as well as the convection system.

Ce four d'émaillage exploite au maximum l'échange thermique entre le flux d'air et de solvants traité et les fils à émailler. Il est cependant de structure complexe et encombrante.This enameling oven makes the most of the exchange thermal between the treated air and solvent flow and the enameled wires. It is however of complex structure and cumbersome.

Le document JP-A-01 11671 divulgue un ensemble de cuisson d'une couche de résine (ou vernis) sur un fil métallique, comportant deux fours de chauffage qui sont montés l'un à la suite de l'autre et dans lesquels défile le fil revêtu de sa couche de résine. Le premier four de chauffage est à circulation d'air. Il assure l'évaporation de la plupart des solvants de la couche de résine sur le fil et maintient la réticulation de la résine à un degré insuffisant, avec l'oxydation de la résine et du fil restant en dessous d'un certain degré. Le deuxième four de chauffage assure la réticulation de la résine à haute température, de l'ordre de 500°C et est prévu à atmosphère intérieure ayant une faible teneur en oxygène, inférieure à 5 %, pour faire obstacle à l'oxydation de la résine et du fil. Cet ensemble d'émaillage nécessite une unité de traitement des vapeurs de solvants provenant du premier four de chauffage, si on veut éviter des problèmes de pollution.Document JP-A-01 11671 discloses a set of baking a layer of resin (or varnish) on a wire metallic, comprising two heating ovens which are mounted one after the other and in which the wire coated with its resin layer. The first oven of heating is by air circulation. It ensures evaporation of most solvents in the resin layer on the wire and maintains the crosslinking of the resin to a degree insufficient, with oxidation of the resin and the remaining wire below a certain degree. The second heating oven ensures the crosslinking of the resin at high temperature, of the order of 500 ° C. and is provided for an interior atmosphere having a low oxygen content, less than 5%, to make obstacle to the oxidation of the resin and the wire. This set glazing requires a vapor treatment unit of solvents from the first heating oven, if you want avoid pollution problems.

La présente invention a pour but d'éviter les inconvénients des solutions connues précitées.
Elle a pour objet une ligne d'émaillage d'un fil conducteur, comportant au moins un ensemble comprenant un applicateur de vernis sur le fil et un four d'émaillage dans lesquels défile ledit fil, ledit four comportant lui-même d'une part au moins une chambre de forme allongée, munie d'une entrée du fil et d'une sortie du fil à ses deux extrémités opposées et équipée intérieurement d'éléments chauffants rayonnants en regard de la trajectoire du fil entre ladite entrée et ladite sortie de fil, pour l'évaporation de solvants dudit vernis sur le fil et/ou la cuisson du vernis sur le fil, et d'autre part des moyens de traitement des vapeurs de solvants provenant de la résine sur le fil, caractérisée en ce que le four d'émaillage comprend une chambre unique dont l'atmosphère intérieure est à faible teneur en oxygène contrôlée et inférieure à 6 %, pour à la fois assurer l'évaporation des solvants et la cuisson dudit vernis sur ledit fil et constituer lesdits moyens de traitement desdites vapeurs de solvants par combustion au contact desdits éléments chauffants rayonnants dans ladite chambre unique, sans flamme en résultant.The object of the present invention is to avoid the drawbacks of the aforementioned known solutions.
It relates to a line for enamelling a conductive wire, comprising at least one assembly comprising a varnish applicator on the wire and an enameling oven in which said wire runs, said oven itself comprising on the one hand at least one elongated chamber, provided with a wire inlet and a wire outlet at its two opposite ends and fitted internally with radiant heating elements facing the path of the wire between said inlet and said wire outlet , for the evaporation of solvents from said varnish on the wire and / or the firing of the varnish on the wire, and on the other hand means for treating solvent vapors coming from the resin on the wire, characterized in that the oven enameling includes a single chamber whose interior atmosphere is low oxygen content controlled and less than 6%, to both ensure the evaporation of solvents and the firing of said varnish on said wire and constitute said hubs ns treatment of said solvent vapors by combustion in contact with said radiant heating elements in said single chamber, without flame resulting therefrom.

Cette ligne peut avantageusement présenter en outre au moins l'une des caractéristiques additionnelles suivantes :

  • ladite chambre unique comporte une sonde de mesure de la teneur en oxygène de ladite atmosphère intérieure et une entrée d'alimentation d'air asservie à la mesure de ladite sonde.
  • ladite chambre unique est en dépression vis-à-vis de l'atmosphère extérieure.
  • lesdits éléments chauffants rayonnants sont choisis pour pouvoir porter ladite chambre unique à une température au moins égale à 1000°C.
This line can advantageously also have at least one of the following additional characteristics:
  • said single chamber comprises a probe for measuring the oxygen content of said interior atmosphere and an air supply inlet controlled by the measurement of said probe.
  • said single chamber is in depression vis-à-vis the external atmosphere.
  • said radiant heating elements are chosen to be able to bring said single chamber to a temperature at least equal to 1000 ° C.

Les caractéristiques et avantages de la présente invention ressortiront de la description d'un mode préféré de réalisation illustré dans la figure unique ci-annexée.The features and advantages of this invention will emerge from the description of a preferred mode illustrated in the single figure attached.

Cette figure unique est une vue en coupe d'une ligne d'émaillage selon l'invention.This single figure is a sectional view of a line enamelling according to the invention.

Cette ligne d'émaillage comprend un applicateur de vernis 1 et un four d'émaillage 2 monté à la suite de l'applicateur et couplé à celui-ci, à travers lesquels le fil conducteur 3 défile horizontalement dans la réalisation illustrée. Bien entendu en variante, la ligne peut être disposée verticalement.This enamelling line includes an applicator varnish 1 and an enameling oven 2 mounted following the applicator and coupled to it, through which the common thread 3 runs horizontally in the realization illustrated. As a variant, of course, the line can be arranged vertically.

L'applicateur de vernis contient le vernis dissout dans des solvants pour le dépôt d'une couche de ce vernis sur le fil défilant dans l'applicateur.The varnish applicator contains the dissolved varnish in solvents for the deposition of a layer of this varnish on the thread running through the applicator.

Le four d'émaillage 2 comporte une chambre unique 4 pour l'évaporation des solvants de la couche de vernis sur le fil, le traitement des vapeurs de solvants et la cuisson à haute température du vernis sur le fil, au fur et à mesure du défilement du fil dans cette chambre. Il est de forme allongée et de section rectangulaire uniforme sur toute sa longueur et maintenu sur une embase support 20.The enameling oven 2 has a single chamber 4 for the evaporation of the solvents from the varnish layer on wire, solvent vapor treatment and baking at high temperature of the varnish on the wire, progressively of the thread running through this room. He is in shape elongated and of uniform rectangular section over its entire length and maintained on a support base 20.

Ce four 2 présente une entrée 5 et une sortie 6 du fil dans la chambre, prévues à ses extrémités opposées. Il est équipé d'éléments chauffants rayonnants 7, montés dans la chambre 4 en regard de la trajectoire du fil dans celle-ci. Ainsi qu'illustré, ces éléments sont portés et tapissent intérieurement la paroi longitudinale supérieure 8 de la chambre, mais peuvent tout aussi bien être sur une autre des parois longitudinales de ce four. Ce sont des résistances électriques avantageusement choisies pour permettre de porter la chambre 4 à une température de l'ordre ou supérieure à 1000°C. De telles résistances électriques sont en tant que telles connues, du type de celles déjà utilisées notamment dans le domaine automobile pour la cuisson de peinture.This oven 2 has an inlet 5 and an outlet 6 for the wire in the room, provided at its opposite ends. It is fitted with radiant heating elements 7, mounted in the chamber 4 opposite the path of the wire therein. As illustrated, these elements are worn and line internally the upper longitudinal wall 8 of the bedroom but can just as easily be on another of the longitudinal walls of this oven. These are resistances electrics advantageously chosen to allow bring room 4 to a temperature of the order or higher than 1000 ° C. Such electrical resistances are as such known, of the type already used especially in the automotive field for cooking painting.

L'une des autres parois longitudinales du four, ici sa paroi inférieure, est de préférence constituée par une paroi double notée 9A et 9B.One of the other longitudinal walls of the oven, here its lower wall, preferably consists of a wall double marked 9A and 9B.

Cette chambre 4 est à atmosphère intérieure à très faible teneur en oxygène, inférieure à 6 % et de préférence de l'ordre de 3 % environ, qui est contrôlée. Elle est équipée d'une sonde 10 de mesure de la teneur en oxygène de l'atmosphère intérieure de la chambre 4. Une entrée contrôlée d'air 11 est asservie à la sonde de mesure et assure le maintien de la teneur en oxygène dans la chambre à sa faible valeur souhaitée.This room 4 has an indoor atmosphere with very low oxygen content, less than 6% and preferably around 3%, which is controlled. She is equipped with a probe 10 for measuring the oxygen content of the interior atmosphere of room 4. An entrance controlled air 11 is slaved to the measurement probe and maintains the oxygen content in the chamber its desired low value.

La sonde de mesure 10 est montée à proximité de la trajectoire du fil 3. L'entrée contrôlée d'air 11 est de préférence distante de celle-ci. Elle débouche dans un conduit d'alimentation 12 s'étendant le long de la chambre et débouchant à ses deux extrémités dans les parties terminales opposées d'entrée et de sortie de la chambre. L'entrée contrôlée d'air 11 est réalisée à travers cette paroi inférieure du four, en particulier dans la partie centrale de celle-ci, ou entre la partie centrale et la partie terminale d'entrée ou même au droit de la partie d'entrée. Le conduit d'alimentation 12 est avantageusement défini entre les deux parois 9A et 9B de la paroi inférieure double du four. La sonde de mesure 10 est quant à elle montée dans la partie terminale de sortie de la chambre 4.The measurement probe 10 is mounted near the wire path 3. The controlled air inlet 11 is preference distant from it. It leads into a supply conduit 12 extending along the chamber and opening at its two ends in the parts opposite terminals of entry and exit of the room. The controlled air inlet 11 is produced through this bottom wall of the oven, especially in the part central part of it, or between the central part and the entry terminal part or even at party right entry. The supply duct 12 is advantageously defined between the two walls 9A and 9B of the lower wall double oven. The measurement probe 10 is mounted in the terminal outlet part of the chamber 4.

Un ventilateur 13 est monté au droit de l'entrée contrôlée d'air 11 dans le conduit d'alimentation 12, pour une circulation d'air introduit par cette entrée dans un sens et l'autre vers ses extrémités et dans la chambre 4, ainsi qu'illustré par les flèches opposées 12A et 12B ainsi que 4A et 4B. Il mélange le flux d'air introduit au flux d'air et de vapeurs présent dans la chambre 4.A fan 13 is mounted to the right of the entrance controlled air 11 in the supply duct 12, for an air circulation introduced by this entry in a direction and the other towards its ends and in room 4, as illustrated by the opposite arrows 12A and 12B as well than 4A and 4B. It mixes the air flow introduced with the flow of air and vapors present in room 4.

Le signal de mesure de la sonde régule le débit d'air qui est introduit dans le conduit 12 et ainsi dans la chambre 4, pour que la teneur en oxygène dans la chambre 4 soit faible mais reste suffisante pour la combustion complète sans flamme des vapeurs de solvants dans la chambre.The probe measurement signal regulates the air flow which is introduced into conduit 12 and so into the chamber 4, so that the oxygen content in chamber 4 is weak but remains sufficient for combustion completely flameless solvent vapors in the bedroom.

La chambre 4 est mise en légère dépression et est ainsi rendue étanche pour éviter une rentrée incontrôlée d'air autre que par l'entrée contrôlée 11. Son entrée 5 est directement couplée de façon hermétique à l'applicateur de vernis 1 et celui-ci est équipé d'une hotte aspirante 15. Sa sortie 6 est reliée à une conduite aspirante 16. L'une des extrémités de cette conduite 16 débouche sur la périphérie de la sortie 6 tandis que son autre extrémité est couplée avec une conduite d'arrivée d'air 17 à un ventilateur 18 permettant de régler le débit d'aspiration. La sortie 6 est également équipée extérieurement d'une tuyère terminale d'entrée d'air extérieur à faible pression, ainsi qu'illustré par les flèches 19, qui est aspiré dans la conduite aspirante 16 mais assure l'étanchéité requise de la sortie 6 autour du fil et l'extraction des gaz de combustion.Room 4 is placed in slight depression and is thus sealed to prevent uncontrolled reentry of air other than through controlled input 11. Its input 5 is directly hermetically coupled to the applicator varnish 1 and this one is equipped with an extractor hood 15. Its outlet 6 is connected to a suction pipe 16. One of the ends of this pipe 16 opens onto the periphery from outlet 6 while its other end is coupled with an air supply line 17 to a fan 18 to adjust the suction flow. Exit 6 is also externally equipped with a terminal nozzle low pressure outside air intake as well as illustrated by the arrows 19, which is sucked into the suction pipe 16 but provides the required tightness of the outlet 6 around the wire and gas extraction from combustion.

La hotte aspirante 15 est équipée d'une cheminée d'évacuation de l'air aspiré et de vapeurs de solvants provenant de l'applicateur. Avantageusement cette hotte aspirante est couplée par une conduite d'évacuation 14 à l'entrée contrôlée d'air 11, pour l'épuration de l'air ainsi aspiré alors effectuée directement dans la chambre 4. La hotte aspirante 15 est commandée par la sonde de mesure, qui contrôle le flux aspiré par la hotte et injecté par l'entrée 11 dans le conduit 12 et la chambre 4.The extractor hood 15 is equipped with a chimney for evacuating intake air and solvent vapors from the applicator. Advantageously this hood suction is coupled by a discharge pipe 14 to the controlled air inlet 11, for air purification as well then sucked directly into room 4. The extractor hood 15 is controlled by the measuring probe, which controls the flow drawn in by the hood and injected through the inlet 11 in the conduit 12 and the chamber 4.

Lors du défilement du fil revêtu de sa couche de vernis dans la chambre 4, les solvants s'évaporent de cette couche de vernis et celui-ci cuit pour sa polymérisation et réticulation. Les vapeurs de solvants sont aussitôt brûlées complètement au contact avec les éléments chauffants rayonnants 7 et sans flamme pour autant du fait de la teneur en oxygène faible mais suffisante à cet effet de l'atmosphère intérieure de la chambre 4. Dans la partie terminale de la chambre 4, située du côté de la sortie 6, l'atmosphère aspirée est totalement ou quasi-totalement exempte de vapeurs de solvants précédemment consumées directement dans la chambre 4.When the wire coated with its layer of varnish in chamber 4, the solvents evaporate from this layer of varnish and it cooked for its polymerization and crosslinking. Solvent vapors are immediately burned completely in contact with the heating elements radiant 7 and flameless provided by the content oxygen weak but sufficient for this purpose from the atmosphere interior of room 4. In the terminal part from room 4, located near exit 6, the atmosphere sucked in is totally or almost completely free of solvent vapors previously consumed directly in room 4.

Le traitement des vapeurs de solvants est donc réalisé directement dans la chambre 4 de cuisson du vernis sur le fil, évitant ainsi tout problème de pollution extérieure et tout autre équipement destiné à cet effet.Solvent vapor treatment is therefore carried out directly in the varnish baking chamber 4 on the wire, thus avoiding any problem of external pollution and any other equipment intended for this purpose.

Avantageusement, la température de la chambre est maintenue à 1000°C ou même davantage. Elle peut être uniforme sur la longueur de la chambre 4. En variante, un gradient de température est créé le long de la chambre, en allant croissant de l'entrée 5 vers la sortie 6, ou de préférence en allant croissant de l'entrée à une partie médiane ou proche de la sortie puis décroissant de cette partie à la sortie.Advantageously, the temperature of the room is maintained at 1000 ° C or even higher. She may be uniform over the length of chamber 4. Alternatively, a temperature gradient is created along the chamber, in ascending from entry 5 to exit 6, or preferably going up from the entrance to a part median or near the exit then decreasing from this party at the exit.

Les avantages du four ou ligne d'émaillage selon l'invention découlent directement de sa conception à chambre unique tant pour le traitement des vapeurs de solvants du vernis sur le fil que pour la cuisson de ce vernis.The advantages of the oven or enameling line according to the invention flow directly from its chamber design unique both for the treatment of solvent vapors varnish on the wire only for baking this varnish.

En outre, le fonctionnement de la chambre 4 à une température très élevée et très supérieure aux températures des solutions connues permet d'accroítre considérablement la vitesse de production, à longueur de four égale. Cette vitesse de production est au moins doublée pour un fonctionnement de la chambre 4 à 1000°C.In addition, the operation of chamber 4 at one very high temperature and much higher than temperatures known solutions can significantly increase the production speed, at equal oven length. This production speed is at least doubled for a operation of chamber 4 at 1000 ° C.

Bien entendu, des variantes de réalisation par rapport à l'exemple illustré et décrit ci-avant peuvent être adoptées sans pour autant sortir du cadre de l'invention. C'est ainsi notamment que les éléments chauffants rayonnants peuvent être en regard de la trajectoire du fil revêtu de la couche de vernis sans pour autant être portés par la paroi supérieure du four. De même l'alimentation contrôlée en air de la chambre peut être faite de manière différente de celle illustrée, en n'intégrant pas le conduit d'alimentation dans l'une des autres parois du four.Of course, variant embodiments compared in the example illustrated and described above can be adopted without departing from the scope of the invention. This is how, in particular, radiant heating elements may be opposite the path of the wire coated with the layer of varnish without being carried by the wall top of the oven. Likewise the controlled air supply of the room can be done differently than illustrated, by not integrating the supply duct into one of the other walls of the oven.

On note également que la ligne d'émaillage peut comporter plusieurs ensembles qui sont analogues à l'ensemble constitué par l'applicateur 1 et le four 2 associés l'un à l'autre et sont alors montés à la suite l'un de l'autre ou des autres.We also note that the enamel line can have multiple sets that are analogous to the assembly constituted by the applicator 1 and the oven 2 associated with each other and are then mounted one after the other on the other or others.

En outre, on précise que le four est construit pour pouvoir s'entr'ouvrir en long et pouvoir s'escamoter par rapport à la trajectoire du fil, ceci permet le démarrage de la ligne, avec le fil hors du four tant qu'il n'a pas atteint une vitesse suffisante pour éviter que le fil ne fonde si la chambre est à 1000°C environ. Le four est ensuite ramené en place sur la ligne et fermé sur ce fil, dès lors que la vitesse du fil évite ce problème.In addition, it is specified that the oven is built for be able to open halfway and be able to retract by relative to the path of the wire, this allows the start of the line, with the wire out of the oven until it has reaches a sufficient speed to prevent the thread from melts if the chamber is at around 1000 ° C. The oven is then brought back into place on the line and closed on this wire, as soon as the wire speed avoids this problem.

Claims (15)

Ligne d'émaillage d'un fil conducteur, comportant au moins un ensemble comprenant un applicateur de vernis sur le fil et un four d'émaillage dans lesquels défile ledit fil, ledit four comportant lui-même d'une part au moins une chambre de forme allongée, munie d'une entrée du fil et d'une sortie du fil à ses deux extrémités opposées et équipée intérieurement d'éléments chauffants rayonnants en regard de la trajectoire du fil entre ladite entrée et ladite sortie de fil, pour l'évaporation de solvants du vernis sur le fil et/ou la cuisson du vernis sur le fil, et d'autre part des moyens de traitement des vapeurs de solvants provenant du vernis sur le fil, caractérisée en ce que le four d'émaillage (2) comprend une chambre unique (4) dont l'atmosphère intérieure est à faible teneur en oxygène contrôlée et inférieure à 6 %, pour à la fois assurer l'évaporation des solvants et la cuisson du vernis sur ledit fil et constituer lesdits moyens de traitement desdites vapeurs de solvants par combustion au contact desdits éléments chauffants rayonnants (7) dans ladite chambre unique, sans flamme en résultant.Enamelling line of a conductive wire, comprising at minus one set including a varnish applicator on the wire and an enameling oven in which said wire runs, said oven itself comprising on the one hand at least one elongated chamber, provided with a wire inlet and a wire outlet at its two opposite ends and internally equipped with radiant heating elements look at the path of the wire between said inlet and said wire outlet, for the evaporation of solvents from the varnish on the wire and / or the firing of the varnish on the wire, and on the other hand means for treating the vapors solvents from the varnish on the wire, characterized in that the enamelling furnace (2) comprises a single chamber (4) whose indoor atmosphere is low in oxygen controlled and less than 6%, to both ensure the evaporation of the solvents and the firing of the varnish on said wire and constitute said means for processing said solvent vapors by combustion on contact with said solvents radiant heating elements (7) in said chamber unique, flameless resulting. Ligne d'émaillage selon la revendication 1, caractérisée en ce que ladite chambre unique comporte une sonde (10) de mesure de la teneur en oxygène de ladite atmosphère intérieure et une entrée d'alimentation d'air (11) asservie à la mesure de ladite sonde.Enameling line according to claim 1, characterized in that said single chamber comprises a probe (10) for measuring the oxygen content of said atmosphere interior and a controlled air supply inlet (11) to the measurement of said probe. Ligne d'émaillage selon la revendication 2, caractérisée en ce ladite chambre unique (4) est en dépression vis-à-vis de l'atmosphère extérieure.Enameling line according to claim 2, characterized in that said single chamber (4) is in depression vis-à-vis from the outside atmosphere. Ligne d'émaillage selon la revendication 3, caractérisée en ce que ladite entrée de fil (5) est reliée de façon hermétique à l'applicateur (1) équipé d'un moyen aspirateur associé (15) et en ce que la sortie de fil (6) est reliée à une conduite d'aspiration (16) dont l'une des extrémités débouche sur la périphérie de ladite sortie de fil et l'autre extrémité est reliée avec une conduite d'arrivée d'air (17) à un ventilateur (18).Enameling line according to claim 3, characterized in that said wire inlet (5) is so connected hermetic to the applicator (1) equipped with a vacuum means associated (15) and in that the wire outlet (6) is connected to a suction line (16) one end of which opens onto the periphery of said wire outlet and the other end is connected with an inlet pipe air (17) to a fan (18). Ligne d'émaillage selon la revendication 4, caractérisée en ce que ledit moyen aspirateur (15) associé à l'applicateur de vernis (1) est relié par une conduite d'évacuation (14) à ladite entrée d'alimentation d'air (11) et est contrôlé par ladite sonde de mesure (10).Enameling line according to claim 4, characterized in that said vacuum means (15) associated with the varnish applicator (1) is connected by a pipe exhaust (14) at said air supply inlet (11) and is controlled by said measurement probe (10). Ligne d'émaillage selon l'une des revendications 4 et 5, caractérisée en ce que ladite sortie de fil (6) est équipée extérieurement d'un moyen terminal (19) d'entrée d'air extérieur à faible pression.Enameling line according to one of claims 4 and 5, characterized in that said wire outlet (6) is equipped externally of an air intake terminal means (19) low pressure exterior. Ligne d'émaillage selon l'une des revendications 1 à 6, caractérisée en ce que lesdits éléments chauffants rayonnants (7) sont montés le long d'une première paroi (8) dudit four (2).Enameling line according to one of claims 1 to 6, characterized in that said heating elements radiant (7) are mounted along a first wall (8) of said oven (2). Ligne d'émaillage selon la revendication 7, caractérisée en ce que lesdits éléments chauffants rayonnants (7) tapissent intérieurement ladite première paroi dudit four (8).Enameling line according to claim 7, characterized in that said radiant heating elements (7) lining said first wall of said oven internally (8). Ligne d'émaillage selon l'une des revendications 7 et 8, caractérisée en ce ladite entrée d'alimentation d'air (11) est réalisée à travers une deuxième (9A, 9B) des parois du four.Enameling line according to one of claims 7 and 8, characterized in that said air supply inlet (11) is carried out through a second (9A, 9B) of the walls of the oven. Ligne d'émaillage selon la revendication 9, caractérisée en ce que ladite deuxième paroi (9A, 9B) est une double paroi comportant un conduit d'alimentation d'air (12) défini entre les deux parois de cette double paroi et ouvert dans les deux parties terminales opposées de ladite chambre unique, et en ce que ladite entrée d'alimentation (11) est réalisée à travers la paroi la plus extérieure (9A) de cette double paroi.Enameling line according to claim 9, characterized in that said second wall (9A, 9B) is a double wall comprising a defined air supply duct (12) between the two walls of this double wall and open in the two opposite end portions of said chamber single, and in that said power input (11) is made through the outermost wall (9A) of this double sided. Ligne d'émaillage selon la revendication 10 caractérisée en ce qu'elle comporte un ventilateur (13) monté dans ledit conduit d'alimentation (12) en regard de ladite entrée d'alimentation d'air (11). Enameling line according to claim 10 characterized in that it comprises a fan (13) mounted in said supply duct (12) opposite said inlet air supply (11). Ligne d'émaillage selon l'une des revendications 1 à 11, caractérisée en ce que lesdits éléments chauffants rayonnants (7) sont choisis pour pouvoir porter ladite chambre unique à une température au moins égale à 1000°C.Enameling line according to one of claims 1 to 11, characterized in that said heating elements radiant (7) are chosen to be able to carry said single chamber at a temperature at least equal to 1000 ° C. Ligne d'émaillage selon la revendication 13, caractérisée en ce que lesdits éléments chauffants rayonnants (7) sont choisis pour créer un gradient de température le long de ladite chambre unique.Enameling line according to claim 13, characterized in that said heating elements radiant (7) are chosen to create a gradient of temperature along said single chamber. Ligne d'émaillage selon la revendication 13, caractérisée en ce que ladite chambre unique (4) est à gradient de température allant croissant de ladite entrée de fil (5) à une partie sensiblement médiane de ladite chambre puis allant décroissant de celle-ci à ladite sortie de fil (6).Enameling line according to claim 13, characterized in that said single chamber (4) is at increasing temperature gradient from said inlet to wire (5) at a substantially middle part of said chamber then descending from it to said wire outlet (6). Ligne d'émaillage selon la revendication 12, caractérisée en ce que ledit four est ouvrant en long et escamotable par rapport à la trajectoire du fil sur la ligne.Enameling line according to claim 12, characterized in that said oven is opening lengthwise and retractable from the path of the wire on the line.
EP98401065A 1997-05-02 1998-04-30 Coating line for a conductive wire Expired - Lifetime EP0875299B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9705444A FR2762860B1 (en) 1997-05-02 1997-05-02 CONDUCTIVE WIRE MESH LINE
FR9705444 1997-05-02

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EP0875299B1 EP0875299B1 (en) 2001-11-14

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EP (1) EP0875299B1 (en)
JP (1) JPH10312719A (en)
AT (1) ATE208660T1 (en)
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DE (1) DE69802456T2 (en)
ES (1) ES2163846T3 (en)
FR (1) FR2762860B1 (en)

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EP1357343A1 (en) * 2002-04-26 2003-10-29 Nexans Coating apparatus for a conductive wire
WO2007051458A1 (en) * 2005-11-07 2007-05-10 Aumann Gmbh Device for applying an insulating varnish to an electrically conductive element
US7774935B2 (en) 2003-07-01 2010-08-17 Thales Method of manufacturing an electrically conductive element
CN108787303A (en) * 2018-06-21 2018-11-13 温州市飞博工程设计有限公司 A kind of use for laboratory coating coating device

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CN100404990C (en) * 2000-09-24 2008-07-23 3M创新有限公司 Vapor collection method
EP1790928A1 (en) * 2005-11-25 2007-05-30 Advanced Photonics Technologies AG Coil coating process and apparatus
CN101783214B (en) * 2010-03-31 2012-05-23 李文铎 Device and method for coating lacquer to manufacture enamelled wire through screw extrusion method
CN104064291B (en) * 2014-07-07 2016-09-28 珠海松田电工有限公司 A kind of enamelled wire painting device and method of lacquering
TWI688972B (en) * 2015-02-18 2020-03-21 瑞士商美莉佛公司 Method and arrangement for cross-linking or vulcanizing an elongate element
CN108735398A (en) * 2017-04-14 2018-11-02 深圳市麦克斯泰有限公司 A kind of equipment and its stripping method for copper or aluminium enamel-covered wire depainting
CN114226178B (en) * 2021-11-24 2023-04-07 铜陵市同威科技有限公司 Split type flat mould of painting

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JPS6411671A (en) * 1987-07-01 1989-01-17 Furukawa Electric Co Ltd Paint baking method
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP1357343A1 (en) * 2002-04-26 2003-10-29 Nexans Coating apparatus for a conductive wire
FR2839084A1 (en) 2002-04-26 2003-10-31 Nexans DEVICE FOR COATING A CONDUCTIVE WIRE
US6923862B2 (en) 2002-04-26 2005-08-02 Nexans Device for coating a conductor wire
US7774935B2 (en) 2003-07-01 2010-08-17 Thales Method of manufacturing an electrically conductive element
WO2007051458A1 (en) * 2005-11-07 2007-05-10 Aumann Gmbh Device for applying an insulating varnish to an electrically conductive element
CN108787303A (en) * 2018-06-21 2018-11-13 温州市飞博工程设计有限公司 A kind of use for laboratory coating coating device

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JPH10312719A (en) 1998-11-24
ES2163846T3 (en) 2002-02-01
FR2762860A1 (en) 1998-11-06
DE69802456D1 (en) 2001-12-20
CA2234823A1 (en) 1998-11-02
US6186089B1 (en) 2001-02-13
FR2762860B1 (en) 1999-07-23
EP0875299B1 (en) 2001-11-14
DE69802456T2 (en) 2002-07-18
ATE208660T1 (en) 2001-11-15
CA2234823C (en) 2007-07-17

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