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EP0146441B1 - Method and device for making a web of corrugated board - Google Patents

Method and device for making a web of corrugated board Download PDF

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Publication number
EP0146441B1
EP0146441B1 EP84402307A EP84402307A EP0146441B1 EP 0146441 B1 EP0146441 B1 EP 0146441B1 EP 84402307 A EP84402307 A EP 84402307A EP 84402307 A EP84402307 A EP 84402307A EP 0146441 B1 EP0146441 B1 EP 0146441B1
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EP
European Patent Office
Prior art keywords
web
undulations
tops
board
machine
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
Application number
EP84402307A
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German (de)
French (fr)
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EP0146441A1 (en
Inventor
Mario Torti
Bernard Capdeboscq
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Martin SA
Original Assignee
Martin SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Martin SA filed Critical Martin SA
Publication of EP0146441A1 publication Critical patent/EP0146441A1/en
Application granted granted Critical
Publication of EP0146441B1 publication Critical patent/EP0146441B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2804—Methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/285—Heating or drying equipment

Definitions

  • the present invention relates to a method of making a strip of cardboard having corrugations on one of its faces, on a second flat sheet of paper or of cardboard covering, method of the type according to which glue is first deposited on the tops of said corrugations of the first sheet, which is then heated by radiation said tops of the corrugations after the adhesive has been deposited there and that, finally, said vertices of the corrugations are brought into contact with said second flat sheet.
  • the invention also relates to a device for implementing the method of the type comprising a first machine, called a “gluer”, in which glue is deposited on the tops of said undulations of the first ply, followed by a second machine, called “Double-sided", ensuring contact between the first and second layers and their final bonding, at least one radiant panel with infrared radiation, directed towards the undulations of the first layer, being mounted between these two machines.
  • gluer To make by gluing a strip of double or triple-sided corrugated cardboard, we first use a first machine, called a “gluer”, in which we apply glue on the top of the corrugations of the first layer or any layers additional single-sided corrugated cardboard making up the layers of a strip of corrugated cardboard. The sheets are then conveyed in a second machine called “double-sided” where they are applied one on the other, glued by heating and finally dried.
  • the invention proposes to remedy these drawbacks.
  • the invention as characterized in the claims, solves the problem posed by the uniformity of the moisture profile in the width of a strip of cardboard by radiant heating, with different powers in the width, the vertices undulations of the sheet of single-sided corrugated cardboard, using a radiant panel divided into several sectors supplied separately with electric power using a power variator device controlled from a processing device taking into account the information of devices for measuring the temperature and the quantity of adhesive deposited on the corrugations, of a device for measuring the speed of movement of the cardboard in the machine and of a device for measuring the moisture profile of the web of cardboard produced at the exit of the “double-sided” machine.
  • the reference 1 designates a “conventional gluing machine for double-double cardboard, followed by a conventional“ double-sided ”machine, the reference 2 of which designates the input frame in which the different plies are applied. one on the other, and whose reference 3 designates the outlet frame, known as "traction”, carrying out the traction drive of the sheet 4 of double-double cardboard produced.
  • the gluing machine 1 comprises a station 5 for preheating the sheet 6 of cover paper, a station 7 for gluing the first sheet 8 of single-sided corrugated cardboard and a station 9 for gluing the second layer 10 of single-sided corrugated cardboard.
  • Station 5 includes a return cylinder 11 followed by a smooth cylinder 12, the hollow interior space 13 of which is heated by saturated steam.
  • Station 7 includes a tray 14 containing glue encrypting approximately 20% of dry extracts and being at a temperature of approximately 30 ° C, thus that a gluing cylinder 15, dipping in the glue tank 14 and continuously rotating in the direction indicated by the arrow.
  • the adhesive is removed by the cylinder 15 in the tank 14 according to a thickness adjusted by the adjustable center distance existing between the cylinder 15 and the auxiliary cylinder 16, called the doctor-cylinder.
  • the upper gluing station 9 is identical in all respects to the gluing station 7 and therefore comprises a glue tank 24, an applicator cylinder 25, a doctor cylinder 26, a cylinder 28 for returning the upper ply 10 and a smooth suction cylinder 27.
  • the sheets 8 and 10 of single-sided cardboard therefore come out of the splicer 1 with the crests of their corrugations covered with glue and the cover paper sheet 6 comes out preheated to a temperature of about 60 ° C.
  • these three plies are then applied to each other in the input frame 2 of the double-sided machine, this frame being equipped with return rollers 31 and 32, as well as a first table 30 heated by steam saturating.
  • the three layers, then united in a strip of double-double cardboard circulate in the double-sided on other heating tables 33, 34 to exit from the traction frame 3 in the form of double-double cardboard glued and dried.
  • a radiant panel 40 fitted, as seen in FIG. 2, with tubes 41 with infrared radiation, is placed between the layers 8 and 10, after the gluer 1 and before the frame 2 for entry of the double-sided , and is directed towards the undulations of the ply 10 as shown diagrammatically in FIG. 1.
  • the calorific power irradiated by the panel 40 must be all the greater the lower the initial temperature of the glue deposited at the upper gluing station 9, the higher the speed of movement of the cardboard, and the more amount of glue deposited on the ridges of the sheet 10 is greater.
  • the panel 40 is divided into four sectors 42, 43, 44, 45 (FIG. 2), supplied separately with electrical energy by a power block 46, at different powers depending on the humidity profile measured across the strip 4 at the exit of the double-sided.
  • a probe 50 such as a thermocouple, placed in the glue tank 24 provides a computer 51 with information representative of the temperature of the glue contained in the tank 24.
  • a humidity sensor 52 provides the computer 51 with information representative of the quantity of glue per square meter deposited on the crests of the corrugations of the sheet 10.
  • a coding wheel 53 provides the computer 51 with information representative of the speed of movement of the cardboard.
  • a humidity profile sensor 54 moves across the strip 4 with a continuous back-and-forth movement, and provides the computer 51 with information representative of the humidity profile in the width of the strip 4 finally produced.
  • the electrical power to be applied to the sectors 42 to 45 of the panel 40 has been determined experimentally beforehand as a function of a given value of these four parameters. It is represented by curve 60 in FIG. 3, giving the electrical power in KW / m 2 as a function of the speed of movement of the cardboard in m / min, for a given quantity and temperature of glue. Zone 61 represents the differences in power applied according to the humidity measured in the width of the strip 4 finally produced. There is obviously a curve 60 per value of the quantity of glue deposited per square meter and per value of the temperature of the glue.
  • the computer 51 provides four output information items 70, 71, 72, 73 which are applied to the block 46 supplied with single-phase electrical voltage 220 volts at 75, and equipped with thyristor power variators controlled by the outputs 70 to 73 of the computer.
  • the variators supply at 80, 81, 82, 83 the electrical supply voltages of each of the sectors 42 to 45 of the radiant panel 40.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Description

La présente invention concerne un procédé de confection d'une bande de carton présentant des ondulations sur une de ses faces, sur une deuxième nappe plane de papier ou de carton de couverture, procédé du type selon lequel on dépose tout d'abord de la colle sur les sommets desdites ondulations de la première nappe, qu'on chauffe ensuite par rayonnement lesdits sommets des ondulations après que la colle y a été déposée et que, finalement, on mette en contact lesdits sommets des ondulations avec ladite deuxième nappe plane.The present invention relates to a method of making a strip of cardboard having corrugations on one of its faces, on a second flat sheet of paper or of cardboard covering, method of the type according to which glue is first deposited on the tops of said corrugations of the first sheet, which is then heated by radiation said tops of the corrugations after the adhesive has been deposited there and that, finally, said vertices of the corrugations are brought into contact with said second flat sheet.

L'invention concerne également un dispositif de mise en oeuvre du procédé du type comprenant une première machine, dite « colleuse », dans laquelle de la colle est déposée sur les sommets desdites ondulations de la première nappe, suivie d'une deuxième machine, dite « double-face », assurant la mise en contact des première et deuxième nappes et leur collage définitif, au moins un panneau radiant à rayonnement infra-rouge, dirigé vers les ondulations de la première nappe, étant monté entre ces deux machines.The invention also relates to a device for implementing the method of the type comprising a first machine, called a "gluer", in which glue is deposited on the tops of said undulations of the first ply, followed by a second machine, called "Double-sided", ensuring contact between the first and second layers and their final bonding, at least one radiant panel with infrared radiation, directed towards the undulations of the first layer, being mounted between these two machines.

Pour confectionner par collage une bande de carton ondulé double ou triple-face, on utilise tout d'abord une première machine, appelée « colleuse », dans laquelle on dépose de la colle sur le sommet des ondulations de la première nappe ou des éventuelles nappes supplémentaires de carton ondulé simple-face constituant les couches d'une bande de carton ondulé. Les nappes sont ensuite acheminées dans une deuxième machine appelée « double-face » où elles sont appliquées l'une sur l'autre, collées par chauffage et finalement séchées.To make by gluing a strip of double or triple-sided corrugated cardboard, we first use a first machine, called a "gluer", in which we apply glue on the top of the corrugations of the first layer or any layers additional single-sided corrugated cardboard making up the layers of a strip of corrugated cardboard. The sheets are then conveyed in a second machine called "double-sided" where they are applied one on the other, glued by heating and finally dried.

Le collage des bandes de carton ondulé simple-face dans la « double-face » nécessite la mise en oeuvre et le transfert d'énergie thermique. Ce transfert de chaleur est généralement réalisé à l'aide d'un panneau à rayonnement infra-rouge placé entre les deux machines et dont le rayonnement est dirigé vers les ondulations de la nappe à coller. Un tel procédé et le dispositif qui lui est associé sont décrits dans le brevet américain n° 3 912 573.The bonding of strips of single-sided corrugated cardboard in the "double-sided" requires the implementation and transfer of thermal energy. This heat transfer is generally carried out using an infrared radiation panel placed between the two machines and the radiation of which is directed towards the undulations of the sheet to be bonded. Such a method and the device associated with it are described in US Pat. No. 3,912,573.

L'utilisation de l'objet du brevet susmentionné permet donc de réaliser une bande de carton ondulé multi-face, dans laquelle se rencontrent des problèmes d'uniformité du profil d'humidité dans la laize de la bande de carton à la sortie de la « double-face ». Ces problèmes sont dus en particulier au fait que le panneau à rayonnement infra-rouge agit avec une puissance de chauffage uniforme sur la largeur de la bande, sans tenir compte des valeurs relatives à la température de la colle, à la quantité de colle déposée sur les sommets des ondulations, à la vitesse de défilement du produit dans le dispositif et au profil d'humidité dans la laize de la bande de carton ondulé produite.The use of the subject of the aforementioned patent therefore makes it possible to produce a strip of multi-sided corrugated cardboard, in which problems of uniformity of the moisture profile are encountered in the width of the cardboard strip at the outlet of the " double sided ". These problems are due in particular to the fact that the infra-red radiation panel acts with a uniform heating power over the width of the strip, without taking account of the values relating to the temperature of the adhesive, to the quantity of adhesive deposited on the tops of the corrugations, at the speed of travel of the product in the device and at the humidity profile in the width of the strip of corrugated cardboard produced.

L'invention se propose de remédier à ces inconvénients. L'invention, telle qu'elle est caractérisée dans les revendications résout le problème posé par l'uniformisation du profil d'humidité dans la laize d'une bande de carton en chauffant par rayonnement, avec des puissances différentes dans la laize, les sommets des ondulations de la nappe de carton ondulé simple-face, en utilisant un panneau radiant divisé en plusieurs secteurs alimentés séparément en puissance électrique à l'aide d'un dispositif variateur de puissance commandé à partir d'un dispositif de traitement prenant en compte les informations de dispositifs de mesure de la température et de la quantité de colle déposée sur les ondulations, d'un dispositif de mesure de la vitesse de défilement du carton dans la machine et d'un dispositif de mesure du profil d'humidité de la laize de carton produit à la sortie de la machine « double-face ».The invention proposes to remedy these drawbacks. The invention, as characterized in the claims, solves the problem posed by the uniformity of the moisture profile in the width of a strip of cardboard by radiant heating, with different powers in the width, the vertices undulations of the sheet of single-sided corrugated cardboard, using a radiant panel divided into several sectors supplied separately with electric power using a power variator device controlled from a processing device taking into account the information of devices for measuring the temperature and the quantity of adhesive deposited on the corrugations, of a device for measuring the speed of movement of the cardboard in the machine and of a device for measuring the moisture profile of the web of cardboard produced at the exit of the “double-sided” machine.

Les avantages obtenus grâce à l'invention résident essentiellement dans le fait que le profil d'humidité de la laize de carton produit peut être contrôlé et rendu parfaitement uniforme par l'adaptation des conditions de chauffage à travers la laize de carton ondulé simple-face, cela en appliquant une puissance de chauffage différente aux divers secteurs du panneau radiant.The advantages obtained thanks to the invention essentially lie in the fact that the moisture profile of the width of cardboard produced can be controlled and made perfectly uniform by adapting the heating conditions through the width of single-sided corrugated cardboard. , this by applying a different heating power to the various sectors of the radiant panel.

L'invention sera mieux comprise à l'aide de la description suivante d'un exemple non limitatif de réalisation appliqué à la confection d'une bande de carton ondulé « double-face », en référence aux dessins annexés dans lesquels :

  • - la figure 1 est une vue d'ensemble schématique d'une chaîne de fabrication de carton ondulé utilisant un dispositif selon l'invention,
  • - la figure 2 est une vue en perspective du panneau radiant équipant la chaîne de la figure 1, avec son armoire d'alimentation en puissance électrique et,
  • - la figure 3 est la courbe de la puissance électrique à transmettre aux secteurs du panneau radiant.
The invention will be better understood with the aid of the following description of a nonlimiting exemplary embodiment applied to the production of a strip of “double-sided” corrugated cardboard, with reference to the appended drawings in which:
  • FIG. 1 is a diagrammatic overview of a production line for corrugated cardboard using a device according to the invention,
  • FIG. 2 is a perspective view of the radiant panel equipping the chain of FIG. 1, with its cabinet for supplying electrical power and,
  • - Figure 3 is the curve of the electrical power to be transmitted to the sectors of the radiant panel.

Sur la figure 1, la référence 1 désigne une machine « colleuse classique pour carton double-double, suivie d'une machine « double-face » classique dont la référence 2 désigne le bâti d'entrée dans lequel les différentes nappes sont appliquées l'une sur l'autre, et dont la référence 3 désigne le bâti de sortie, dit « de traction •, réalisant l'entraînement par traction de la nappe 4 de carton double-double produite.In FIG. 1, the reference 1 designates a “conventional gluing machine for double-double cardboard, followed by a conventional“ double-sided ”machine, the reference 2 of which designates the input frame in which the different plies are applied. one on the other, and whose reference 3 designates the outlet frame, known as "traction", carrying out the traction drive of the sheet 4 of double-double cardboard produced.

De manière très classique, la machine colleuse 1 comporte un poste 5 de préchauffage de la nappe 6 de papier de couverture, un poste 7 d'encollage de la première nappe 8 de carton ondulé simple-face et un poste 9 d'encollage de la deuxième nappe 10 de carton ondulé simple-face.Very conventionally, the gluing machine 1 comprises a station 5 for preheating the sheet 6 of cover paper, a station 7 for gluing the first sheet 8 of single-sided corrugated cardboard and a station 9 for gluing the second layer 10 of single-sided corrugated cardboard.

Le poste 5 comporte un cylindre de renvoi 11 suivi d'un cylindre lisse 12 dont l'espace intérieur creux 13 est chauffé par de la vapeur saturante.Station 5 includes a return cylinder 11 followed by a smooth cylinder 12, the hollow interior space 13 of which is heated by saturated steam.

Le poste 7 comporte un bac 14 contenant de la colle chiffrant environ 20% d'extraits secs et se trouvant à une température d'environ 30° C, ainsi qu'un cylindre colleur 15, trempant dans le bac de colle 14 et tournant continûment dans le sens indiqué par la flèche.Station 7 includes a tray 14 containing glue encrypting approximately 20% of dry extracts and being at a temperature of approximately 30 ° C, thus that a gluing cylinder 15, dipping in the glue tank 14 and continuously rotating in the direction indicated by the arrow.

La colle est prélevée par le cylindre 15 dans le bac 14 suivant une épaisseur réglée par l'entraxe ajustable existant entre le cylindre 15 et le cylindre auxiliaire 16, dit cylindre-docteur.The adhesive is removed by the cylinder 15 in the tank 14 according to a thickness adjusted by the adjustable center distance existing between the cylinder 15 and the auxiliary cylinder 16, called the doctor-cylinder.

Elle est déposée par le cylindre 15 sur les sommets des ondulations de la nappe 8 de carton simple-face, nappe amenée en position grâce à une poulie de renvoi 18 et maintenue pendant la dépose de la colle par un cylindre de retenue 17, ce dernier cylindre étant un cylindre lisse aspirant, dont l'espace intérieur creux 19 est chauffé à la vapeur saturante.It is deposited by the cylinder 15 on the tops of the corrugations of the sheet 8 of single-sided cardboard, the sheet brought into position by means of a return pulley 18 and maintained during the deposition of the adhesive by a retaining cylinder 17, the latter cylinder being a smooth suction cylinder, the hollow interior space 19 of which is heated with saturated steam.

Le poste d'encollage supérieur 9 est en tous points identique au poste d'encollage 7 et comporte donc un bac de colle 24, un cylindre applicateur 25, un cylindre-docteur 26, un cylindre 28 de renvoi de la nappe supérieure 10 et un cylindre lisse aspirant 27.The upper gluing station 9 is identical in all respects to the gluing station 7 and therefore comprises a glue tank 24, an applicator cylinder 25, a doctor cylinder 26, a cylinder 28 for returning the upper ply 10 and a smooth suction cylinder 27.

Les nappes 8 et 10 de carton simple-face sortent donc de la colleuse 1 avec les crêtes de leurs ondulations recouvertes de colle et la nappe de papier couverture 6 en sort préchauffée à une température d'environ 60° C. De manière classique, ces trois nappes sont ensuite appliquées l'une sur l'autre dans le bâti d'entrée 2 de la machine double-face, ce bâti étant équipé de rouleaux de renvoi 31 et 32, ainsi que d'une première table 30 chauffée à la vapeur saturante. Les trois nappes, alors réunies en une bande de carton double-double, circulent dans la double-face sur d'autres tables chauffantes 33, 34 pour sortir du bâti de traction 3 sous forme de carton double-double collé et séché. Sur le dessin, on distingue les cylindres 35, 36 d'entraînement et de traction de la bande 4 équipant le bâti de sortie 3 de la double-face.The sheets 8 and 10 of single-sided cardboard therefore come out of the splicer 1 with the crests of their corrugations covered with glue and the cover paper sheet 6 comes out preheated to a temperature of about 60 ° C. Conventionally, these three plies are then applied to each other in the input frame 2 of the double-sided machine, this frame being equipped with return rollers 31 and 32, as well as a first table 30 heated by steam saturating. The three layers, then united in a strip of double-double cardboard, circulate in the double-sided on other heating tables 33, 34 to exit from the traction frame 3 in the form of double-double cardboard glued and dried. In the drawing, there are the cylinders 35, 36 for driving and pulling the strip 4 fitted to the outlet frame 3 of the double-sided.

Un panneau radiant 40 équipé, comme on le voit sur la figure 2, de tubes 41 à rayonnement infra-rouge, est placé entre les nappes 8 et 10, après la colleuse 1 et avant le bâti 2 d'entrée de la double-face, et est dirigé vers les ondulations de la nappe 10 comme schématisé sur la figure 1.A radiant panel 40 fitted, as seen in FIG. 2, with tubes 41 with infrared radiation, is placed between the layers 8 and 10, after the gluer 1 and before the frame 2 for entry of the double-sided , and is directed towards the undulations of the ply 10 as shown diagrammatically in FIG. 1.

La puissance calorifique irradiée par la panneau 40 doit être d'autant plus grande que la température initiale de la colle déposée au niveau du poste d'encollage supérieure 9 est plus faible, que la vitesse de défilement du carton est plus grande, et que la quantité de colle déposée sur les crêtes de la nappe 10 est plus grande.The calorific power irradiated by the panel 40 must be all the greater the lower the initial temperature of the glue deposited at the upper gluing station 9, the higher the speed of movement of the cardboard, and the more amount of glue deposited on the ridges of the sheet 10 is greater.

Il est donc avantageux d'appliquer une puissance rayonnée différente au panneau radiant 40 en fonction de ces trois paramètres.It is therefore advantageous to apply a different radiated power to the radiant panel 40 as a function of these three parameters.

Le panneau 40 est divisé en quatre secteurs 42, 43, 44, 45 (figure 2), alimentés séparément en énergie électrique par un bloc de puissance 46, selon des puissances différentes en fonction du profil d'humidité mesuré en travers de la bande 4 à la sortie de la double-face.The panel 40 is divided into four sectors 42, 43, 44, 45 (FIG. 2), supplied separately with electrical energy by a power block 46, at different powers depending on the humidity profile measured across the strip 4 at the exit of the double-sided.

Une sonde 50, telle qu'un thermocouple, placée dans le bac de colle 24 fournit à un calculateur 51 une information représentative de la température de la colle contenue dans le bac 24. Un capteur d'humidité 52 fournit au calculateur5l une information représentative de la quantité de colle au mètre carré déposée sur les crêtes des ondulations de la nappe 10. Une roue codeuse53 fournit au calculateur 51 une information représentative de la vitesse de défilement du carton. Un capteur du profil d'humidité 54 se déplace en travers de la bande 4 avec un mouvement continu de va-et-vient, et fournit au calculateur 51 des informations représentatives du profil d'humidité dans la laize de la bande 4 finalement produite.A probe 50, such as a thermocouple, placed in the glue tank 24 provides a computer 51 with information representative of the temperature of the glue contained in the tank 24. A humidity sensor 52 provides the computer 51 with information representative of the quantity of glue per square meter deposited on the crests of the corrugations of the sheet 10. A coding wheel 53 provides the computer 51 with information representative of the speed of movement of the cardboard. A humidity profile sensor 54 moves across the strip 4 with a continuous back-and-forth movement, and provides the computer 51 with information representative of the humidity profile in the width of the strip 4 finally produced.

La puissance électrique à appliquer aux secteurs 42 à 45 du panneau 40 a été préalablement déterminée expérimentalement en fonction d'une valeur donnée de ces quatre paramètres. Elle est représentée par la courbe 60 de la figure 3, donnant la puissance électrique en KW/m2 en fonction de la vitesse de défilement du carton en m/mn, pour une quantité et une température de colle donnée. La zone 61 représente les différences de puissance appliquée selon l'humidité mesurée dans la laize de la bande 4 finalement produite. Il existe évidemment une courbe 60 par valeur de la quantité de colle déposée au mètre carré et par valeur de la température de la colle.The electrical power to be applied to the sectors 42 to 45 of the panel 40 has been determined experimentally beforehand as a function of a given value of these four parameters. It is represented by curve 60 in FIG. 3, giving the electrical power in KW / m 2 as a function of the speed of movement of the cardboard in m / min, for a given quantity and temperature of glue. Zone 61 represents the differences in power applied according to the humidity measured in the width of the strip 4 finally produced. There is obviously a curve 60 per value of the quantity of glue deposited per square meter and per value of the temperature of the glue.

En fonction de ces données, le calculateur 51 fournit quatre informations de sortie 70, 71, 72, 73 qui sont appliquées au bloc 46 alimenté en tension électrique monophasée 220 volts en 75, et équipé de variateurs de puissance à thyristors commandés par les sorties 70 à 73 du calculateur. Les variateurs fournissent en 80, 81, 82, 83 les tensions électriques d'alimentation de chacun des secteurs 42 à 45 du panneau radiant 40.As a function of these data, the computer 51 provides four output information items 70, 71, 72, 73 which are applied to the block 46 supplied with single-phase electrical voltage 220 volts at 75, and equipped with thyristor power variators controlled by the outputs 70 to 73 of the computer. The variators supply at 80, 81, 82, 83 the electrical supply voltages of each of the sectors 42 to 45 of the radiant panel 40.

La puissance électrique appliquée à chacun de ces secteurs est donnée par la courbe 60 de la figure 3, qui représente la valeur moyenne de la zone 61 en fonction des valeurs mesurées par le capteur 54 du profil d'humidité du produit 4 en sortie de la double-face.The electric power applied to each of these sectors is given by the curve 60 of FIG. 3, which represents the average value of the zone 61 as a function of the values measured by the sensor 54 of the humidity profile of the product 4 at the outlet of the double sided.

Claims (3)

1. Method for manufacturing a web of corrugated board (4) by gluing a first web (10) of board corrugated on one face onto a second covering web (8) of plane paper or board, which method comprises firstly the pasting of the tops of said web undulations, secondly the heating by radiation of said tops of web undulations and finally the laying of said tops of the web undulations onto the plane web, characterized by the fact that the tops of the web undulations are heated up to various degress over the web width, ensuring a regular humidity rate on the whole width (4) of the manufactured web.
2. Device according to claim 1 including a first gluing machine (1), where the glue is applied on the top of the undulations of the first web (10), a second machine (2, 3) called double-facer laying and gluing together the first and second webs (10,8) with at least one infra-red panel (40) directed towards the undulations of the first web (10), ans mounted between those two machines (1, 2 and 3), characterized by the fact that said panel (40) is divided in several sectors (42 to 45) and that said sectors (42 to 45) are separately supplied with electric power by at least one power variator (46) controlled by a processing device (51) receiving its information from a device (50) measuring the glue temperature on the web undulations, a device (52) measuring the amount of glue applied on said undulations, and a device 53 measuring the board running speed in the machine.
3. Device according to claim 2, characterized by the fact that the processing device (51) also receives information transmitted by a device (54) measuring the humidity degree on the width of the board delivered by the double-facing machine (2,3).
EP84402307A 1983-11-17 1984-11-13 Method and device for making a web of corrugated board Expired EP0146441B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8318280A FR2555101B1 (en) 1983-11-17 1983-11-17 METHOD AND DEVICE FOR MANUFACTURING A CORRUGATED CARDBOARD STRIP
FR8318280 1983-11-17

Publications (2)

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EP0146441A1 EP0146441A1 (en) 1985-06-26
EP0146441B1 true EP0146441B1 (en) 1988-03-02

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EP84402307A Expired EP0146441B1 (en) 1983-11-17 1984-11-13 Method and device for making a web of corrugated board

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US (1) US4589944A (en)
EP (1) EP0146441B1 (en)
DE (1) DE3469503D1 (en)
FR (1) FR2555101B1 (en)

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DE19506778A1 (en) * 1995-02-27 1996-08-29 Bhs Corr Masch & Anlagenbau Process for the production of corrugated cardboard
DE19506777A1 (en) * 1995-02-27 1996-08-29 Bhs Corr Masch & Anlagenbau Process for producing corrugated cardboard and device therefor
IT202300012165A1 (en) 2023-06-14 2024-12-14 Cmc Spa MACHINE FOR MAKING CORRUGATED CARDBOARD, MACHINE FOR BOXING OR PACKING ITEMS WITH CORRUGATED CARDBOARD AND METHODS
IT202300012171A1 (en) 2023-06-14 2024-12-14 Cmc Spa MACHINE FOR MAKING CORRUGATED CARDBOARD SHEETS AND ROLLS

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US5894681A (en) * 1995-05-01 1999-04-20 Inland Container Corporation Automated fabrication of corrugated paper products
US5527408A (en) * 1995-06-16 1996-06-18 Allen; George H. Method and apparatus for automatically controlling the moisture content of corrugated board
FR2744387B1 (en) * 1996-02-01 1998-04-17 Rufo Donato PROCESS AND DEVICE FOR THE CONTINUOUS MANUFACTURE OF SHEETS OF COMPACT MULTILAYER CARTON
US6074520A (en) * 1998-04-08 2000-06-13 Marquip, Inc. Heated holddown mat for corrugator double backer
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US6602546B1 (en) 2002-06-21 2003-08-05 Coater Services, Inc. Method for producing corrugated cardboard
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US8398802B2 (en) * 2009-01-22 2013-03-19 Coater Services, Inc. Method for moisture and temperature control in corrugating operation
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Publication number Priority date Publication date Assignee Title
DE19506778A1 (en) * 1995-02-27 1996-08-29 Bhs Corr Masch & Anlagenbau Process for the production of corrugated cardboard
DE19506777A1 (en) * 1995-02-27 1996-08-29 Bhs Corr Masch & Anlagenbau Process for producing corrugated cardboard and device therefor
IT202300012165A1 (en) 2023-06-14 2024-12-14 Cmc Spa MACHINE FOR MAKING CORRUGATED CARDBOARD, MACHINE FOR BOXING OR PACKING ITEMS WITH CORRUGATED CARDBOARD AND METHODS
IT202300012171A1 (en) 2023-06-14 2024-12-14 Cmc Spa MACHINE FOR MAKING CORRUGATED CARDBOARD SHEETS AND ROLLS

Also Published As

Publication number Publication date
DE3469503D1 (en) 1988-04-07
EP0146441A1 (en) 1985-06-26
FR2555101A1 (en) 1985-05-24
US4589944A (en) 1986-05-20
FR2555101B1 (en) 1987-10-23

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