EP0774342A1 - Device for heating a machine for making cardboard - Google Patents

Device for heating a machine for making cardboard Download PDF

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Publication number
EP0774342A1
EP0774342A1 EP96118181A EP96118181A EP0774342A1 EP 0774342 A1 EP0774342 A1 EP 0774342A1 EP 96118181 A EP96118181 A EP 96118181A EP 96118181 A EP96118181 A EP 96118181A EP 0774342 A1 EP0774342 A1 EP 0774342A1
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EP
European Patent Office
Prior art keywords
heating
rigid frame
enclosure
welding
heating enclosure
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
EP96118181A
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German (de)
French (fr)
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EP0774342B1 (en
Inventor
Klaus Nagel
Swen Joerissen
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Peters Maschinenfabrik GmbH
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Peters Maschinenfabrik GmbH
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Publication of EP0774342A1 publication Critical patent/EP0774342A1/en
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    • 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 heating device for a machine for manufacturing corrugated cardboard, in particular a convection heating device using a heating fluid circulating in a convector.
  • the heating devices used to date in the field of the manufacture of corrugated cardboard generally consist of a convector comprising a cast iron enclosure in which saturated steam circulates in spiral channels.
  • This cast iron enclosure has a heat exchange surface with the cardboard to be heated which is smooth and flat.
  • This type of device has a definite advantage in that the heat exchange surface, being smooth and flat, does not retain the dust and impurities left by the passage of the cardboard. Its maintenance is therefore simplified and the heat exchange between the carton and the exchange surface is very acceptable.
  • the temperature of the upper surface of the latter is lower than the temperature of its lower part and this causes distortion of the surface of the enclosure causing it to lose its flatness, which greatly disrupts the proper functioning of the device.
  • FIG. 1 Another corrugated cardboard heating device is also known, the construction of which was aimed at improving the device described above.
  • the cast iron construction has been replaced by a welded, lighter construction comprising a heating plate produced by assembling a series of steel tubes placed side by side. These steel tubes are connected together, in the manner of a coil, so as to allow the passage of steam in the hot plate.
  • a cover sheet is then welded to the upper face of the series of tubes so as to present a heat exchange surface with the cardboard which is smooth and flat.
  • Such a device is described in more detail in patent DE-2 213 745.
  • the machining time is relatively high and the cover sheet constitutes a thermal barrier which prevents appropriate control of the distribution of temperatures over the exchange surface.
  • This sheet steel of thin 8 is then connected to the lower part 11 of the closure plane 7 by spot welding in a staggered configuration so that the welding points 19 are distant from each other by a sufficient distance, in the range of twenty eight to thirty millimeters, diagonally.
  • the front chamber 12 is equipped, by welding, with a connector 14 and the rear chamber 13 is, for its part, also equipped by welding, with a connector 15.
  • the connector 15 is then closed and a fluid under high pressure , for example hydraulic oil, is introduced into the front chamber 12 through the connector 14.
  • the injection of this fluid under high pressure into the front chamber 12 will have the effect of deforming the thin steel sheet 8 by so that it is arched in the areas not linked to the closure plane 7 so as to form cells 18 communicating with each other.
  • the high pressure fluid will then be removed from the heating enclosure 1 and the latter may therefore receive a heat fluid such as, for example, saturated steam.
  • the heating chamber 1 is further provided with a plurality of fixing points 16, constituted by threaded rods, welded at the location of some of the welding points 19 connecting the thin steel sheet 8 to the plane 7.
  • These fixing points 16 are intended to serve as anchors to ensure a perfect connection with a rigid frame, described in more detail in relation to Figures 5 and 6, so as to allow the adjustment of the flatness of the 'heating enclosure 1 as well as to give the assembly an acceptable overall rigidity.
  • FIG. 2 is a schematic view showing the flow of steam in the heating plate 17 of the heating enclosure 1.
  • the saturated steam is injected into the front chamber 12 of the heating plate 17 by the connector 14.
  • the saturated steam first distributed in the front chamber and will cross, regularly, the plate heating 17 through the cells 18 to finally lead into the rear chamber 13 and exit the heating chamber 1 through the connector 15.
  • the vapor flow is therefore divided by the connection points (welding points 19) between the thin steel sheet 8 and the closing plane 7. This will result in a turbulent flow of the vapor flow due to the small passage sections of the cells 18 and thereby will also obtain an increase in the heat transmission to the closing plane 7 which will be in contact with the corrugated cardboard.
  • FIG 3 is a sectional view along III-III of Figure 1 in which we can see the arrangement of the various components of the heating enclosure 1.
  • This figure also shows the cells 18 created by the deformation of the sheet d 'thin steel 8 at the places where it is not connected to the lower part 11 of the closure plane 7 by the welding points 19.
  • only one connector 14 for the entry of steam and only a connector 15 for the steam outlet have been shown. It is understood that one could imagine that several connections 14 for the steam inlet and that several connections 15 for the steam outlet are connected to their respective front 12 and rear 13 chambers to improve and regularize the flow of the vapor flow.
  • FIG. 4 is a side view, in partial section, of FIG. 1 showing the configuration of the front 12 and rear 13 chambers obtained by folding the front part 9 and the rear part 10 of the sheet metal to forty-five degrees 'thin steel 8.
  • the additional reference signs used in Figures 3 and 4 are the same as those already used in connection with the description of Figure 1 which may also be referred to.
  • the blocking in position of this frame 21 is obtained by means of the counter nuts 31 placed on the screws 29.
  • the device 20 for adjusting the flatness of the exchange surface of the heating enclosure 1 is constituted by a rigid frame 34 made of welded construction. This rigid frame is obtained by assembling U-shaped irons 35, 36, 37 of which only three have been shown here for reasons of simplification of the description. It is understood that one could use many more depending on the number of adjustment points chosen to ensure the flatness of the exchange surface. These various U-shaped irons 35, 36, 37 are interconnected by U-shaped irons or possibly flat irons 38, 39.
  • the heating enclosure 1 is attached to the rigid frame 34 by tie rods 40 which can be directly screwed to one of their ends on the threaded parts of the fixing points 16 (see figure 3).
  • the other end of the tie rods 40 has a threaded portion 41 and is fixed, by means of washers 42, nuts 43 and lock nuts 44, in the lower wing of the U-shaped iron 35, 36, 37 of the frame rigid 34.
  • the flatness of the exchange surface is adjusted by acting on the means of fixing the tie rods 40 to the rigid frame 34.
  • the bars 45, respectively the plates 46 are provided with a wing 47 which engages in the slot 48 of a connecting piece 49 screwed to the upper end of each of the tie rods 40.
  • a screw will be used or a pin, not shown, which will pass through the connecting piece and engage in an elongated hole of the wing 47.
  • the wings 47 of the bars 45 located upstream that is to say on the left of FIG. 5, do not will not have an elongated hole but a simple bore. Due to the use of tie rods 40, it would also be plausible to imagine for these, a rigid attachment to the heating enclosure 1. In this case, the thermal deformations of the heating enclosure 1 would be compensated by the bending of the tie rods 40.
  • connection between the upper end of the tie rods 40 and the wing 47 is carried out using a pin passing through the connecting piece 49 to engage in a drilled bore in the connecting piece 49, this bore being of a diameter larger than the diameter of the pin.
  • the heating enclosure 1 can also be fixed laterally, so as to take account of thermal expansion phenomena, to the frames of the machine by means of the plates 24 and 25 appearing in FIG. 7. This method of fixing therefore makes it possible to take into account thermal expansion constraints so that they do not influence the flatness of the heat exchange surface.
  • the heating chamber 1 will thus be laterally floating relative to the rigid frame 34 while being firmly connected thereto by the tie rods 40.
  • the adjustment of the flatness will be carried out in the same manner as mentioned previously by means of the members for fixing the tie rods 40 to the rigid frame 34.
  • FIG. 7 is a view showing the arrangement of the bodies 20 for correcting the flatness of the heating enclosure 1. This figure is in fact a view from below of the heating enclosure 1 which shows the use of plates 46 in place and place of the bars 45 shown in FIG. 8. The plates 46 are fixed to the heating enclosure 1 by the fixing points 16.
  • FIG 8 is a view showing a method of fixing the heating enclosure 1 on a frame 53 connected to the side frames of the corrugated cardboard making machine.
  • the front 5 and rear 6 walls of the heating enclosure 1 are used to connect the latter to the frames of the corrugated cardboard making machine.
  • connection between the heating enclosure 1 and the rigid frame 34 by means of members such as tie rods has, inter alia, the advantage of avoiding heat transmission from the enclosure to the frame due to the low connection sections and even allows, if necessary, the use of insulating connections so as to further reduce the heat transmissions thus canceling any deformation of the rigid frame 34 which will therefore fully fulfill its solid basic function to adjust the flatness of the heating chamber exchange surface 1.
  • the heating enclosure 1 constitutes a very flexible membrane allowing the mechanical adjustment of its exchange surface by means of a rigid frame which is not dependent on the thermal conditions of the enclosure, in the establishment of a better heat transmission on the plane of the exchange surface, in the improvement of the regulation of the temperature due to the low thermal inertia of the device, in the use of a small volume of the saturated steam flow thus making it possible to eliminate any accumulator or pressure tank and in reducing the manufacturing costs due to the possibility of achieving a light construction of the device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

The system uses heating fluid circulating in a convector. The convector comprises a heating chamber (1) in which saturated vapour circulates. The chamber is constituted by a heating table (17) composed of an open rectangular casing (2) having side walls (3,4) and front (5) and rear (6) walls fixed to a closing surface (7). The lower face of this surface (11) is connected to a steel sheet of small thickness (8) having cavities (18) obtained by deformation. The steel sheet has its front (9) and rear (10) edges folded at 45 degrees downwards so as to form front (12) and rear (13) chambers. The steel sheet is connected to a rigid frame by adjusting parts so as to avoid heat transmission between the heating chamber and the rigid frame. The assembly of heating chamber and rigid frame is fixed floating in the manufacturing machine so as to account for thermal deformations resulting from heating.

Description

La présente invention a pour objet un dispositif de chauffage pour une machine de fabrication de carton ondulé, notamment un dispositif de chauffage par convection utilisant un fluide de chauffage circulant dans un convecteur.The present invention relates to a heating device for a machine for manufacturing corrugated cardboard, in particular a convection heating device using a heating fluid circulating in a convector.

Les dispositifs de chauffage utilisés jusqu'à ce jour dans le domaine de la fabrication du carton ondulé sont généralement composes d'un convecteur comprenant une enceinte en fonte dans laquelle circule, dans des canaux en spirale, de la vapeur saturée. Cette enceinte en fonte présente une surface d'échange de chaleur avec le carton à chauffer qui est lisse et plane. Ce genre de dispositif présente un avantage certain du fait que la surface d'échange de chaleur, en étant lisse et plane, ne retient pas les poussières et les impuretés laissées par le passage du carton. Son entretien est donc simplifié et l'échange de chaleur entre le carton et la surface d'échange est très acceptable. Cependant, en raison du passage du cartonet de l'épaisseur de l'enceinte en fonte, la température de la surface supérieure de celle-ci est plus basse que la température de sa partie inférieure et cela provoque une distorsion de la surface de l'enceinte lui faisant perdre sa planéité, ce qui perturbe grandement le bon fonctionnement du dispositif. D'autre part, du fait de la grande rigidité de l'enceinte, les forces à mettre en jeu pour redresser la surface supérieure de l'enceinte sont tellement importantes qu'il est difficile voir impossible de corriger la planéité de cette surface par des moyens mécaniques. De plus, une telle construction présente l'inconvénient de nécessiter une construction lourde qui conduit à de grandes pertes calorifiques. Ce genre de dispositifs sont également tributaires d'une grande inertie thermique qui est incompatible avec une bonne régulation de la température de la surface d'échange. En outre, ces dispositifs, de par le volume important de vapeur qui circule dans leurs canaux, nécessite l'utilisation d'un réservoir de pression généralement homologué avec certificat.The heating devices used to date in the field of the manufacture of corrugated cardboard generally consist of a convector comprising a cast iron enclosure in which saturated steam circulates in spiral channels. This cast iron enclosure has a heat exchange surface with the cardboard to be heated which is smooth and flat. This type of device has a definite advantage in that the heat exchange surface, being smooth and flat, does not retain the dust and impurities left by the passage of the cardboard. Its maintenance is therefore simplified and the heat exchange between the carton and the exchange surface is very acceptable. However, due to the passage of the carton and the thickness of the cast iron enclosure, the temperature of the upper surface of the latter is lower than the temperature of its lower part and this causes distortion of the surface of the enclosure causing it to lose its flatness, which greatly disrupts the proper functioning of the device. On the other hand, because of the great rigidity of the enclosure, the forces to be brought into play to straighten the upper surface of the enclosure are so great that it is difficult if not impossible to correct the flatness of this surface by mechanical means. In addition, such a construction has the disadvantage of requiring a heavy construction which leads to large heat losses. This type of device is also dependent on a high thermal inertia which is incompatible with good regulation of the temperature of the exchange surface. In addition, these devices, due to the large volume of steam which circulates in their channels, requires the use of a pressure tank generally approved with certificate.

On connaît également un autre dispositif de chauffage de carton ondulé dont la construction visait l'amélioration du dispositif décrit ci-avant. Dans ce dispositif de chauffage, la construction en fonte a été remplacée par une construction soudée, plus légére comportant une plaque chauffante réalisée par assemblage d'une série de tubes en acier plaçés côte à côte. Ces tubes en acier sont reliés entre eux, à la manière d'un serpentin, de façon à autoriser le passage de la vapeur dans la plaque chauffante. Une tôle de couverture est ensuite soudée sur la face supérieure de la série de tubes de manière à présenter une surface d'échange de chaleur avec le carton qui soit lise et plane. Un tel dispositif est décrit plus en détail dans le brevet DE-2 213 745. Dans cette construction, le temps d'usinage est relativement élevé et la tôle de couverture constitue un barrage thermique qui empêche un contrôle approprié de la répartition des températures sur la surface d'échange. Pour améliorer cette situation, on a tenté de supprimer cette tôle de couverture mais en faisant cela, on s'est trouvé en présence d'un autre problème qui est celui de l'accumulation d'impuretés entre les différents tubes de la plaque chauffante ce qui provoque des salissures et même l'endommagement de la feuille de couverture du carton ondulé. Pour éviter cela, on a prévu d'usiner les tubes de façon à ce que les angles de ceux-ci, dans le plan de la surface d'échange, présentent des arrondis les plus petits possibles ce qui nécessite des procédés de fabrication spéciaux et coûteux. Par contre, il est possible dans ce dispositif de corriger mécaniquement la déformation du plan de la surface d'échange, mais toutefois de manière imparfaite en raison de la transmission de chaleur inévitable entre l'enceinte de chauffage et les moyens mécaniques utilisés pour la correction de la planéité de la surface d'échange.Another corrugated cardboard heating device is also known, the construction of which was aimed at improving the device described above. In this heating device, the cast iron construction has been replaced by a welded, lighter construction comprising a heating plate produced by assembling a series of steel tubes placed side by side. These steel tubes are connected together, in the manner of a coil, so as to allow the passage of steam in the hot plate. A cover sheet is then welded to the upper face of the series of tubes so as to present a heat exchange surface with the cardboard which is smooth and flat. Such a device is described in more detail in patent DE-2 213 745. In this construction, the machining time is relatively high and the cover sheet constitutes a thermal barrier which prevents appropriate control of the distribution of temperatures over the exchange surface. To improve this situation, we tried to remove this cover sheet but by doing this, we found ourselves in the presence of another problem which is that of the accumulation of impurities between the different tubes of the heating plate. which causes soiling and even damage to the cover sheet of the corrugated board. To avoid this, it is planned to machine the tubes so that the angles thereof, in the plane of the exchange surface, have the smallest possible rounding which requires special manufacturing processes and expensive. On the other hand, it is possible in this device to mechanically correct the deformation of the plane of the exchange surface, but however imperfectly due to the inevitable heat transmission between the heating enclosure and the mechanical means used for the correction. of the flatness of the exchange surface.

La présente invention a pour but de supprimer les inconvénients précités et de fournir un dispositif de chauffage du carton ondulé qui soit simple à réaliser tout en présentant des avantages certains en ce qui concerne son poids, son prix de revient et son fonctionnement.The object of the present invention is to eliminate the aforementioned drawbacks and to provide a device for heating the carton. corrugated which is simple to produce while having certain advantages with regard to its weight, its cost price and its operation.

Ce but est atteint grâce à l'utilisation d'un dispositif de chauffage conforme à ce qu'énonce la revendication 1.This object is achieved by the use of a heating device according to what is stated in claim 1.

L'invention sera mieux comprise à la lecture de la description qui va suivre d'une forme de réalisation, donnée à titre d'exemple non limitatif et illustrée schématiquement à l'aide des dessins annexés dans lesquels,

  • la figure 1 est une vue en plan, du dessous d'une enceinte de chauffage,
  • la figure 2 est une vue schématique représentant l'écoulement de la vapeur dans l'enceinte de chauffage,
  • la figure 3 est une vue en coupe selon III-III de la figure 1,
  • la figure 4 est une vue de côté, en coupe partielle, de la figure 1,
  • la figure 5 est une vue en coupe partielle, dans la longueur, d'un dispositif de chauffage,
  • la figure 6 est une vue en coupe transversale d'un dispositif de chauffage,
  • la figure 7 est une vue représentant la disposition des organes de correction de la planéité de l'enceinte de chauffage,
  • la figure 8 est une vue représentant un mode de fixation de l'enceinte de chauffage et
  • la figure 9 est une vue en coupe selon IX-IX de la figure 8.
The invention will be better understood on reading the following description of an embodiment, given by way of nonlimiting example and illustrated diagrammatically with the aid of the appended drawings in which,
  • FIG. 1 is a plan view, from below of a heating enclosure,
  • FIG. 2 is a schematic view showing the flow of steam in the heating enclosure,
  • FIG. 3 is a sectional view along III-III of FIG. 1,
  • FIG. 4 is a side view, in partial section, of FIG. 1,
  • FIG. 5 is a view in partial section, in length, of a heating device,
  • FIG. 6 is a cross-sectional view of a heating device,
  • FIG. 7 is a view showing the arrangement of the bodies for correcting the flatness of the heating enclosure,
  • FIG. 8 is a view showing a method of fixing the heating enclosure and
  • FIG. 9 is a sectional view along IX-IX of FIG. 8.

L'enceinte de chauffage 1 représentée sur la figure 1 comprend une plaque chauffante 17 composée d'un boîtier ouvert 2 de forme rectangulaire présentant des parois latérales 3, 4 et des parois frontale 5 et arrière 6 solidaires d'un plan de fermeture 7 (voir figure 3). Ce boîtier ouvert 2 peut être réalisé, par pliage et soudage, à partir d'une feuille de tôle d'acier d'une épaisseur de l'ordre de 4 millimètres. Une autre tôle d'acier de faible épaisseur 8, de l'ordre de 1,5 millimètre, dont les bords avant 9 et arrière 10 ont été pliés à quarante cinq degrés vers le bas de manière à former une chambre avant 12 et une chambre arrière 13, est soudée sur son pourtour à l'intérieur du boîtier ouvert 2. Cette tôle d'acier de faible épaisseur 8 est ensuite reliée à la partie inférieure 11 du plan de fermeture 7 par soudage par points suivant une configuration en quinconce de telle façon que les points de soudage 19 soient éloignés l'un de l'autre d'une distance suffisante, de l'ordre de vingt huit à trente millimètre, en diagonale. La chambre avant 12 est équipée, par soudage, d'un raccord 14 et la chambre arrière 13 est, quant à elle, équipée, également par soudage, d'un raccord 15. Le raccord 15 est ensuite obturé et un fluide sous haute pression, par exemple de l'huile hydraulique, est introduit dans la chambre avant 12 par le raccord 14. L'injection de ce fluide sous haute pression dans la chambre avant 12 aura pour effet de déformer la tôle d'acier de faible épaisseur 8 de telle façon à ce qu'elle se voûte dans les zones non liées au plan de fermeture 7 de sorte à former des alvéoles 18 communiquant entre-elles. Le fluide sous haute pression sera ensuite retiré de l'enceinte de chauffage 1 et celle-ci pourra dès lors recevoir un fluide calorifique tel que, par exemple, de la vapeur d'eau saturée.The heating enclosure 1 shown in FIG. 1 comprises a heating plate 17 composed of an open box 2 of rectangular shape having side walls 3, 4 and front walls 5 and rear 6 secured to a closure plane 7 ( see figure 3). This open housing 2 can be produced, by folding and welding, from a sheet of steel sheet with a thickness of the order of 4 millimeters. Another thin sheet of steel 8, of the order of 1.5 millimeters, the front 9 and rear 10 edges have been folded forty-five degrees downwards so as to form a front chamber 12 and a rear chamber 13, is welded around its periphery inside the open housing 2. This sheet steel of thin 8 is then connected to the lower part 11 of the closure plane 7 by spot welding in a staggered configuration so that the welding points 19 are distant from each other by a sufficient distance, in the range of twenty eight to thirty millimeters, diagonally. The front chamber 12 is equipped, by welding, with a connector 14 and the rear chamber 13 is, for its part, also equipped by welding, with a connector 15. The connector 15 is then closed and a fluid under high pressure , for example hydraulic oil, is introduced into the front chamber 12 through the connector 14. The injection of this fluid under high pressure into the front chamber 12 will have the effect of deforming the thin steel sheet 8 by so that it is arched in the areas not linked to the closure plane 7 so as to form cells 18 communicating with each other. The high pressure fluid will then be removed from the heating enclosure 1 and the latter may therefore receive a heat fluid such as, for example, saturated steam.

L'enceinte de chauffage 1 est en outre munie d'une pluralité de points de fixation 16, constitués par des tiges taraudées, soudées à l'endroit de certains des points de soudage 19 reliant la tôle d'acier de faible épaisseur 8 au plan de fermeture 7. Ces points de fixation 16 sont destinés à servir d'ancrages pour assurer une liaison parfaite avec un chassis rigide, décrit plus en détail en relation avec les figures 5 et 6, de façon à permettre le réglage de la planéité de l'enceinte de chauffage 1 ainsi qu'à conférer à l'ensemble une rigidité globale acceptable.The heating chamber 1 is further provided with a plurality of fixing points 16, constituted by threaded rods, welded at the location of some of the welding points 19 connecting the thin steel sheet 8 to the plane 7. These fixing points 16 are intended to serve as anchors to ensure a perfect connection with a rigid frame, described in more detail in relation to Figures 5 and 6, so as to allow the adjustment of the flatness of the 'heating enclosure 1 as well as to give the assembly an acceptable overall rigidity.

La figure 2 est une vue schématique représentant l'écoulement de la vapeur dans la plaque chauffante 17 de l'enceinte de chauffage 1. La vapeur saturée est injectée dans chambre avant 12 de la plaque chauffante 17 par le raccord 14. La vapeur saturée se réparti d'abord dans la chambre avant et va traverser, de manière réguliaire, la plaque chauffante 17 en passant par les alvéoles 18 pour finalement déboucher dans la chambre arrière 13 et ressortir de l'enceinte de chauffage 1 par le raccord 15. Le flux de vapeur est de ce fait divisé par les points de liaison (points de soudage 19) entre la tôle d'acier de faible épaisseur 8 et le plan de fermeture 7. On obtiendra de ce fait un écoulement turbulent du flux de vapeur en raison des faibles sections de passage des alvéoles 18 et on obtiendra également de ce fait une augmentation de la transmission de chaleur au plan de fermeture 7 qui sera lui en contact avec le carton ondulé. De plus, en raison de la vitesse élevée du flux de vapeur, le condensat est poussé à grande vitesse au travers de la plaque chauffante 17 avant d'être récupéré par des collecteurs de condensat, non représentés, pouvant être situés dans la partie inférieure de la chambre arrière 13. Le condensat peut aussi être évacué par le raccord 15 qui est relié au circuit de retour de vapeur. Le choix d'une construction présentant des alvéoles 18 permet de travailler avec un faible volume de vapeur saturée circulant dans la plaque chauffante 17 ce qui autorise la suppression du réservoir de pression indispensable dans les constructions existantes connues à ce jour.FIG. 2 is a schematic view showing the flow of steam in the heating plate 17 of the heating enclosure 1. The saturated steam is injected into the front chamber 12 of the heating plate 17 by the connector 14. The saturated steam first distributed in the front chamber and will cross, regularly, the plate heating 17 through the cells 18 to finally lead into the rear chamber 13 and exit the heating chamber 1 through the connector 15. The vapor flow is therefore divided by the connection points (welding points 19) between the thin steel sheet 8 and the closing plane 7. This will result in a turbulent flow of the vapor flow due to the small passage sections of the cells 18 and thereby will also obtain an increase in the heat transmission to the closing plane 7 which will be in contact with the corrugated cardboard. In addition, due to the high speed of the vapor flow, the condensate is pushed at high speed through the heating plate 17 before being recovered by condensate collectors, not shown, which can be located in the lower part of the rear chamber 13. The condensate can also be discharged through the connector 15 which is connected to the vapor return circuit. The choice of a construction having cells 18 makes it possible to work with a small volume of saturated vapor circulating in the heating plate 17 which authorizes the elimination of the pressure tank essential in the existing constructions known to date.

La figure 3 est une vue en coupe selon III-III de la figure 1 sur laquelle on peut voir la disposition des différents composants de l'enceinte de chauffage 1. Cette figure montre en outre les alvéoles 18 crées par la déformation de la tôle d'acier de faible épaisseur 8 aux endroits où celle-ci n'est pas reliée à la partie inférieure 11 du du plan de fermeture 7 par les points de soudage 19. sur cette figure, seulement un raccord 14 pour l'entrée de la vapeur et seulement un raccord 15 pour la sortie de la vapeur ont été représentés. Il est bien entendu que l'on pourrait imaginer que plusieurs raccords 14 pour l'entrée de la vapeur et que plusieurs raccords 15 pour la sortie de la vapeur soient connectés à leur chambre avant 12 et arrière 13 respectives pour améliorer et régulariser l'écoulement du flux de vapeur.Figure 3 is a sectional view along III-III of Figure 1 in which we can see the arrangement of the various components of the heating enclosure 1. This figure also shows the cells 18 created by the deformation of the sheet d 'thin steel 8 at the places where it is not connected to the lower part 11 of the closure plane 7 by the welding points 19. in this figure, only one connector 14 for the entry of steam and only a connector 15 for the steam outlet have been shown. It is understood that one could imagine that several connections 14 for the steam inlet and that several connections 15 for the steam outlet are connected to their respective front 12 and rear 13 chambers to improve and regularize the flow of the vapor flow.

La figure 4 est une vue de côté, en coupe partielle, de la figure 1 représentant la configuration des chambres avant 12 et arrière 13 obtenues par le pliage à quarante cinq degrés de la partie avant 9 et de la partie arrière 10 de la tôle d'acier de faible épaisseur 8. Les signes de référence supplémentaires utilisés sur les figures 3 et 4 sont les mêmes que ceux déjà utilisés en relation avec la description de la figure 1 à laquelle on pourra également se référer.FIG. 4 is a side view, in partial section, of FIG. 1 showing the configuration of the front 12 and rear 13 chambers obtained by folding the front part 9 and the rear part 10 of the sheet metal to forty-five degrees 'thin steel 8. The additional reference signs used in Figures 3 and 4 are the same as those already used in connection with the description of Figure 1 which may also be referred to.

La figure 5 est une vue en coupe partielle, dans la longueur, d'un dispositif de chauffage représentant l'enceinte de chauffage 1 équipée d'un dispositif de réglage 20 de la planéité de la surface d'échange de l'enceinte de chauffage 1, cet ensemble étant monté sur un cadre 21 fixé entre les deux bâtis latéraux 22, 23 (voir figure 6) de la machine de fabrication de carton ondulé. L'enceinte de chauffage 1 comporte des barrettes 24, 25 pour la relier, de façon flottante, au cadre 21. Cette liaison flottante est nécessaire en raison de la dilatation thermique de l'enceinte de chauffage 1. Le cadre 21 est formé de deux fers en U 26, 27 rendus solidaires des longerons 32, 33 des bâtis latéraux 22, 23 par des vis 28 (voir figure 6). Le réglage en hauteur du cadre 21 est réalisé au moyen des vis 29 traversant des pattes de fixation 30 soudées contre les faces intérieures des bâtis latéraux 22, 23. Le blocage en position de ce cadre 21 est obtenu au moyen des contre-écrous 31 plaçés sur les vis 29. Le dispositif de réglage 20 de la planéité de la surface d'échange de l'enceinte de chauffage 1 est constitué par un cadre rigide 34 réalisé en construction soudée. Ce cadre rigide est obtenu par l'assemblage de fers en U 35, 36, 37 dont seulement trois ont été représentés ici pour des raisons de simplification de la description. Il est bien entendu que l'on pourrait en utiliser beaucoup plus en fonction du nombre de points de réglage choisis pour assurer la planéité de la surface d'échange. Ces différents fers en U 35, 36, 37 sont reliés entre-eux par des fers en U ou éventuellement des fers plats 38, 39. L'enceinte de chauffage 1 est attachée au cadre rigide 34 par des tirants 40 qui peuvent être directement vissés à l'une de leurs extrémités sur les parties filetées des points de fixation 16 (voir figure 3). L'autre extrémité des tirants 40, présente une partie filetée 41, et est fixée, au moyen de rondelles 42, d'écrous 43 et de contre écrous 44, dans l'aile inférieure des fer en U 35, 36, 37 du cadre rigide 34. Dans cette version, le réglage de la planéité de la surface d'échange s'effectue en agissant sur les moyens de fixation des tirants 40 au cadre rigide 34. De façon à obtenir un réglage moins ponctuel, on a imaginé de placer, sur les points de fixation 16, soit des barrettes 45 s'étendant sur toute la largeur de la surface d'échange, soit des plaquettes 46 (voir figures 7 et 8) Les barrettes 45, respectivement les plaquettes 46, sont munies d'une aile 47 qui s'engage dans la fente 48 d'une pièce de liaison 49 vissée à l'extrémité supérieure de chacun des tirants 40. Pour assurer la fixation de la pièce de liaison 49 à l'aile 47, on utilisera une vis ou une goupille, non représentée, qui traversera la pièce de liaison et s'engagera dans un trou allongé de l'aile 47. Pour assurer la position longitudinale, dans le sens du passage du carton, indiqué par la flèche 50, les ailes 47 des barettes 45 situées en amont, c'est à dire sur la gauche de la figure 5, ne possèderont non pas un trou allongé mais un simple alésage. En raison de l'utilisation des tirants 40, il serait également plausible d'imaginer pour ceux-ci, une fixation rigide à l'enceinte de chauffage 1. Dans ce cas, les déformations thermiques de l'enceinte de chauffage 1 seraient compensées par la flexion des tirants 40. On pourrait aussi imaginer que la liaison entre l'extrémité supérieure des tirants 40 et l'aile 47 soit réalisée à l'aide d'une goupille traversant la pièce de liaison 49 pour s'engager dans un alésage percé dans la pièce de liaison 49, cet alésage étant d'un diamètre plus grand que le diamètre de la goupile. L'enceinte de chauffage 1 peut aussi être fixée latéralement, de façon à tenir compte des phénomènes de dilatation thermique, aux bâtis de la machine au moyen des plaquettes 24 et 25 apparaissant sur la figure 7. Ce mode de fixation permet de ce fait de tenir compte des contraintes de dilatation thermique de telle sorte que celles-ci n'influencent pas la planéité de la surface d'échange de chaleur. L'enceinte de chauffage 1 sera ainsi latéralement flottante par rapport au cadre rigide 34 tout en étant reliée fermement à celui-ci par les tirants 40. Dans cette forme d'exécution, le réglage de la planéité s'effectuera de la même manière que mentionné précédemment au moyen des organes de fixation des tirants 40 au cadre rigide 34.Figure 5 is a partial sectional view, in length, of a heating device representing the heating enclosure 1 equipped with a device 20 for adjusting the flatness of the exchange surface of the heating enclosure 1, this assembly being mounted on a frame 21 fixed between the two lateral frames 22, 23 (see FIG. 6) of the machine for manufacturing corrugated cardboard. The heating enclosure 1 has bars 24, 25 for floatingly connecting it to the frame 21. This floating connection is necessary due to the thermal expansion of the heating enclosure 1. The frame 21 is formed by two U-shaped irons 26, 27 made integral with the side members 32, 33 of the side frames 22, 23 by screws 28 (see FIG. 6). The height of the frame 21 is adjusted by means of the screws 29 passing through the fixing lugs 30 welded against the inner faces of the side frames 22, 23. The blocking in position of this frame 21 is obtained by means of the counter nuts 31 placed on the screws 29. The device 20 for adjusting the flatness of the exchange surface of the heating enclosure 1 is constituted by a rigid frame 34 made of welded construction. This rigid frame is obtained by assembling U-shaped irons 35, 36, 37 of which only three have been shown here for reasons of simplification of the description. It is understood that one could use many more depending on the number of adjustment points chosen to ensure the flatness of the exchange surface. These various U-shaped irons 35, 36, 37 are interconnected by U-shaped irons or possibly flat irons 38, 39. The heating enclosure 1 is attached to the rigid frame 34 by tie rods 40 which can be directly screwed to one of their ends on the threaded parts of the fixing points 16 (see figure 3). The other end of the tie rods 40 has a threaded portion 41 and is fixed, by means of washers 42, nuts 43 and lock nuts 44, in the lower wing of the U-shaped iron 35, 36, 37 of the frame rigid 34. In this version, the flatness of the exchange surface is adjusted by acting on the means of fixing the tie rods 40 to the rigid frame 34. In order to obtain a less punctual adjustment, it has been imagined to place , on the fixing points 16, either bars 45 extending over the entire width of the exchange surface, or plates 46 (see FIGS. 7 and 8) The bars 45, respectively the plates 46, are provided with a wing 47 which engages in the slot 48 of a connecting piece 49 screwed to the upper end of each of the tie rods 40. To secure the connecting piece 49 to the wing 47, a screw will be used or a pin, not shown, which will pass through the connecting piece and engage in an elongated hole of the wing 47. To ensure the longitudinal position, in the direction of the passage of the carton, indicated by the arrow 50, the wings 47 of the bars 45 located upstream, that is to say on the left of FIG. 5, do not will not have an elongated hole but a simple bore. Due to the use of tie rods 40, it would also be plausible to imagine for these, a rigid attachment to the heating enclosure 1. In this case, the thermal deformations of the heating enclosure 1 would be compensated by the bending of the tie rods 40. One could also imagine that the connection between the upper end of the tie rods 40 and the wing 47 is carried out using a pin passing through the connecting piece 49 to engage in a drilled bore in the connecting piece 49, this bore being of a diameter larger than the diameter of the pin. The heating enclosure 1 can also be fixed laterally, so as to take account of thermal expansion phenomena, to the frames of the machine by means of the plates 24 and 25 appearing in FIG. 7. This method of fixing therefore makes it possible to take into account thermal expansion constraints so that they do not influence the flatness of the heat exchange surface. The heating chamber 1 will thus be laterally floating relative to the rigid frame 34 while being firmly connected thereto by the tie rods 40. In this embodiment, the adjustment of the flatness will be carried out in the same manner as mentioned previously by means of the members for fixing the tie rods 40 to the rigid frame 34.

La figure 7 est une vue représentant la disposition des organes de correction 20 de la planéité de l'enceinte de chauffage 1. Cette figure est en fait une vue du dessous de l'enceinte de chauffage 1 qui montre l'utilisation de plaquettes 46 en lieu et place des barrettes 45 représentées sur la figure 8. Les plaquettes 46 sont fixées à l'enceinte de chauffage 1 par les points de fixation 16.FIG. 7 is a view showing the arrangement of the bodies 20 for correcting the flatness of the heating enclosure 1. This figure is in fact a view from below of the heating enclosure 1 which shows the use of plates 46 in place and place of the bars 45 shown in FIG. 8. The plates 46 are fixed to the heating enclosure 1 by the fixing points 16.

La figure 8 est une vue représentant un mode de fixation de l'enceinte de chauffage 1 sur un cadre 53 relié aux bâtis latéraux de la machine de fabrication de carton ondulé. Dans cette exécution, on utilise les parois frontale 5 et arrière 6 de l'enceinte de chauffage 1 pour relier celle-ci aux bâtis de la machine de fabrication du carton ondulé. Pour ce faire, on prévoit l'utilisation de plusieurs plots 54 fixés sur le cadre 53 (voir également figure 9). Ces plots possèdent chacun une fraisure 55 dans laquelle vient s'engager, de façon libre, la paroi frontale 5 alors que la paroi arrière 6 de l'enceinte de chauffage 1 repose quant à elle sur des plots lisses, non représentés, de sorte à tenir compte des contraintes thermiques.Figure 8 is a view showing a method of fixing the heating enclosure 1 on a frame 53 connected to the side frames of the corrugated cardboard making machine. In this embodiment, the front 5 and rear 6 walls of the heating enclosure 1 are used to connect the latter to the frames of the corrugated cardboard making machine. To do this, provision is made for the use of several studs 54 fixed to the frame 53 (see also FIG. 9). These studs each have a countersink 55 in which the front wall 5 engages freely, while the rear wall 6 of the heating enclosure 1 rests on smooth studs, not shown, so as to take thermal constraints into account.

Le choix du genre de liaison entre l'enceinte de chauffage 1 et le cadre rigide 34 au moyen d'organes tels que des tirants présente entre autres l'avantage d'éviter une transmission de chaleur de l'enceinte au cadre en raison des faibles sections de connection et permet même, si besoin était, l'utilisation de liaisons isolantes de façon à réduire encore les transmissions de chaleur annulant ainsi toute déformation du cadre rigide 34 qui dès lors remplira pleinement sa fonction de base solide pour régler la planéité de la surface d'échange de l'enceinte de chauffage 1.The choice of the type of connection between the heating enclosure 1 and the rigid frame 34 by means of members such as tie rods has, inter alia, the advantage of avoiding heat transmission from the enclosure to the frame due to the low connection sections and even allows, if necessary, the use of insulating connections so as to further reduce the heat transmissions thus canceling any deformation of the rigid frame 34 which will therefore fully fulfill its solid basic function to adjust the flatness of the heating chamber exchange surface 1.

Les autres avantages procurés par le dispositif selon l'invention résident essentiellement dans le fait que l'enceinte de chauffage 1 constitue une membrane très souple permettant le réglage mécanique de sa surface d'échange par le truchement d'un cadre rigide n'étant pas tributaire des conditions thermiques de l'enceinte, dans l'établissement d'une meilleure transmission de chaleur au plan de la surface d'échange, dans l'amélioration de la régulation de la température en raison de la faible inertie thermique du dispositif, dans l'utilisation d'un faible volume du flux de vapeur saturée permettant ainsi de supprimer tout accumulateur ou réservoir de pression et dans la diminution des coûts de fabrication en raison de la possibilité de réaliser une construction légère du dispositif.The other advantages provided by the device according to the invention essentially reside in the fact that the heating enclosure 1 constitutes a very flexible membrane allowing the mechanical adjustment of its exchange surface by means of a rigid frame which is not dependent on the thermal conditions of the enclosure, in the establishment of a better heat transmission on the plane of the exchange surface, in the improvement of the regulation of the temperature due to the low thermal inertia of the device, in the use of a small volume of the saturated steam flow thus making it possible to eliminate any accumulator or pressure tank and in reducing the manufacturing costs due to the possibility of achieving a light construction of the device.

Claims (9)

Dispositif de chauffage pour une machine de fabrication de carton ondulé, notamment un dispositif de chauffage par convection utilisant un fluide de chauffage circulant dans un convecteur comprenant une enceinte de chauffage (1) dans laquelle circule de la vapeur saturée, caractérisé en ce que l'enceinte (1), constituée par une table chauffante (17) composée d'un boîtier ouvert (2) de forme rectangulaire présentant des parois latérales (3, 4) et des parois frontale (5) et arrière (6) solidaires d'un plan de fermeture (7) dont la face inférieure (11) est reliée à une tôle d'acier de faible épaisseur (8) présentant des alvéoles (18) obtenues par déformation, la tôle d'acier de faible épaisseur (8) ayant ses bords avant (9) et arrière (10) pliés à quarante cinq degrés vers le bas de manière à former une chambre avant (12) et une chambre arrière (13), est associée à un cadre rigide (34) auquel elle est reliée, de manière à tenir compte des contraintes thermiques, par des organes de réglage agencés de façon éviter une transmission de chaleur entre l'enceinte de chauffage (1) et le cadre rigide (34) et en ce que l'ensemble constitué par l'enceinte de chauffage (1) et le cadre rigide (34) est fixé de manière flottante dans la machine de fabrication de carton ondulé de façon à tenir compte des déformations thermiques résultant du chauffage de l'enceinte de chauffage (1).Heating device for a machine for manufacturing corrugated cardboard, in particular a convection heating device using a heating fluid circulating in a convector comprising a heating enclosure (1) in which saturated steam circulates, characterized in that the enclosure (1), constituted by a heating table (17) composed of an open box (2) of rectangular shape having side walls (3, 4) and front (5) and rear (6) walls integral with a closure plane (7), the lower face (11) of which is connected to a thin sheet of steel (8) having cells (18) obtained by deformation, the thin sheet of steel (8) having its front (9) and rear (10) edges folded forty-five degrees downwards so as to form a front chamber (12) and a rear chamber (13), is associated with a rigid frame (34) to which it is connected, so as to take into account thermal constraints ques, by adjusting members arranged so as to avoid heat transmission between the heating enclosure (1) and the rigid frame (34) and in that the assembly constituted by the heating enclosure (1) and the rigid frame (34) is fixed in a floating manner in the corrugated cardboard making machine so as to take account of the thermal deformations resulting from the heating of the heating enclosure (1). Dispositif selon la revendication 1 caractérisé en ce que la tôle d'acier de faible épaisseur (8), comprise entre 0,5 et 1,5 milimètres, est soudée sur son pourtour à l'intérieur du boîtier ouvert (2), en ce que la tôle d'acier de faible épaisseur (8) est d'autre part reliée, avant déformation sous l'effet d'un fluide sous haute pression, à la partie inférieure (11) du plan de fermeture (7) par des points de soudage (19) suivant une configuration en quinconce de telle façon que les points de soudage (19) soient éloignés l'un de l'autre, en ce que la tôle d'acier de faible épaisseur (8) est déformée de telle façon à ce qu'elle se voûte dans les zones non liées au plan de fermeture (7) de sorte à former des alvéoles (18) communiquant entre-elles et en ce que la chambre avant (12) est équipée, par soudage, d'un raccord (14) et la chambre arrière (13) est, quant à elle, équipée, également par soudage, d'un raccord (15).Device according to claim 1 characterized in that the thin steel sheet (8), between 0.5 and 1.5 millimeters, is welded around its periphery inside the open housing (2), in that that the thin sheet of steel (8) is on the other hand connected, before deformation under the effect of a fluid under high pressure, to the lower part (11) of the closure plane (7) by points welding (19) in a staggered configuration so that the welding points (19) are spaced from each other, in that the thin steel sheet (8) is deformed in such a way that it is vaulted in the areas not linked to the closure plane (7) so as to form cells (18) communicating with each other and in that the front chamber (12) is equipped, by welding, with a connector (14) and the rear chamber (13) is, in turn, equipped, also by welding, with a connector (15). Dispositif selon la revendication 2 caractérisé en ce que le boîtier ouvert (2) est réalisé, par pliage et soudage, à partir d'une feuille de tôle d'acier d'une épaisseur de l'ordre de 4 millimètres.Device according to Claim 2, characterized in that the open housing (2) is produced, by folding and welding, from a sheet of steel sheet with a thickness of the order of 4 millimeters. Dispositif selon la revendication 2 caractérisé en ce que les points de soudage (19) sont espacés, en diagonale, d'une distance comprise entre vingt huit et trente millimètres.Device according to claim 2 characterized in that the welding points (19) are spaced, diagonally, by a distance between twenty eight and thirty millimeters. Dispositif selon la revendication 1 caractérisé en ce que la table chauffante (17) est munie d'une pluralité de points de fixation (16), constitués par des tiges taraudées, soudées à l'endroit de certains des points de soudage (19) reliant la tôle d'acier de faible épaisseur (8) au plan de fermeture (7).et en ce que ces points de fixation (16) sont destinés à servir d'ancrages pour assurer une liaison parfaite avec le cadre rigide (34).Device according to claim 1 characterized in that the heating table (17) is provided with a plurality of fixing points (16), constituted by threaded rods, welded at the location of some of the welding points (19) connecting the thin steel sheet (8) to the closure plane (7). and in that these fixing points (16) are intended to serve as anchors to ensure perfect connection with the rigid frame (34). Dispositif selon la revendication 1 caractérisé en ce que les organes de liaison entre l'enceinte de chauffage (1) et le cadre rigide (34) sont constitués par des tirants (40) fixés de manière réglable dans le cadre rigide (34) et de manière flottante dans l'enceinte de chauffage (1).Device according to claim 1 characterized in that the connecting members between the heating enclosure (1) and the rigid frame (34) consist of tie rods (40) fixed in an adjustable manner in the rigid frame (34) and of floating way in the heating enclosure (1). Dispositif selon la revendication 5 caractérisé en ce que les points de fixation (16) servent d'ancrages pour des barrettes (45) s'étendant sur toute la largeur de la partie inférieure de l'enceinte de chauffage (1).Device according to Claim 5, characterized in that the fixing points (16) serve as anchors for bars (45) extending over the entire width of the lower part of the heating enclosure (1). Dispositif selon la revendication 7 caractérisé en ce que les points de fixation (16) servent d'ancrages pour des plaquettes (46) disposées de manière espacée dans la largeur de la partie inférieure de l'enceinte de chauffage (1).Device according to Claim 7, characterized in that the fixing points (16) serve as anchors for plates (46) arranged spaced apart across the width of the lower part of the heating enclosure (1). Dispositif selon la revendication 1 caractérisé en ce que la liaison de l'ensemble constitué par l'enceinte de chauffage (1) et le cadre rigide (34) avec la machine de fabrication de carton ondulé est réalisée par les parois latérales (3, 4) du boîtier ouvert (2) s'engageant librement dans les fraisages (55) de plots (54).Device according to Claim 1, characterized in that the connection of the assembly constituted by the heating enclosure (1) and the rigid frame (34) with the machine for manufacturing corrugated cardboard is produced by the side walls (3, 4 ) of the open housing (2) freely engaging in the millings (55) of studs (54).
EP96118181A 1995-11-15 1996-11-13 Heating device for a machine for making corrugated cardboard Expired - Lifetime EP0774342B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998002298A1 (en) * 1996-07-17 1998-01-22 Marquip, Inc. Aparatus and method for leveling and supporting the hot plates in a double backer for corrugated paperboard
EP3738759A1 (en) 2019-05-13 2020-11-18 Guangdong Fosber Intelligent Equipment Co., Ltd. A hot plate for double facer for the production of corrugated board and double facer comprising a plurality of said plates

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6759956B2 (en) * 1998-10-23 2004-07-06 Royal Thoughts, L.L.C. Bi-directional wireless detection system
DE10004754C1 (en) * 2000-02-03 2001-08-02 Sollich Kg Cooling tunnel for confectionery

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088794B (en) * 1959-03-05 1960-09-08 Waldhof Zellstoff Fab Drying device for corrugated cardboard machines
GB886589A (en) * 1960-06-17 1962-01-10 Samuel M Langston Co Method of and apparatus for drying corrugated paper board
DE2213745A1 (en) 1972-03-22 1973-10-04 Peters Maschf Werner H K HEATING PLATE, IN PARTICULAR FOR A CORRUGATED CARDBOARD GLUING MACHINE
DE2604879A1 (en) * 1976-02-07 1977-08-11 Gerhard & Rauh Panel type cooling and heating elements - made from plates joined at edges and expanded by fluid pressure
GB1554992A (en) * 1977-02-10 1979-10-31 Molins Machine Co Inc Double facer platen
EP0460872A1 (en) * 1990-06-06 1991-12-11 ROLLS-ROYCE plc Heat exchangers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085191A (en) * 1935-08-24 1937-06-29 Westinghouse Electric & Mfg Co Plate condenser
US3237687A (en) * 1963-02-08 1966-03-01 Grove Valve & Regulator Co Heat transfer chamber
US4484623A (en) * 1983-04-08 1984-11-27 Paul Mueller Company Dual flow condenser with through connections
DE3422684C2 (en) * 1984-06-19 1986-07-24 Zehnder-Beutler GmbH, 7630 Lahr Hollow panel radiators
US4678027A (en) * 1984-12-14 1987-07-07 Paul Mueller Company Dual-walled coiled plate heat exchanger with vented interface
US4739825A (en) * 1986-01-14 1988-04-26 General Electric Company Apparatus for cooling the core of a liquid cooled transformer
US5183525A (en) * 1990-05-24 1993-02-02 United Container Machinery Group, Inc. Heater for a double facing corrugating machine
US5501762A (en) * 1994-06-07 1996-03-26 Marquip, Inc. Hot plate for corrugated paperboard double facer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1088794B (en) * 1959-03-05 1960-09-08 Waldhof Zellstoff Fab Drying device for corrugated cardboard machines
GB886589A (en) * 1960-06-17 1962-01-10 Samuel M Langston Co Method of and apparatus for drying corrugated paper board
DE2213745A1 (en) 1972-03-22 1973-10-04 Peters Maschf Werner H K HEATING PLATE, IN PARTICULAR FOR A CORRUGATED CARDBOARD GLUING MACHINE
DE2604879A1 (en) * 1976-02-07 1977-08-11 Gerhard & Rauh Panel type cooling and heating elements - made from plates joined at edges and expanded by fluid pressure
GB1554992A (en) * 1977-02-10 1979-10-31 Molins Machine Co Inc Double facer platen
EP0460872A1 (en) * 1990-06-06 1991-12-11 ROLLS-ROYCE plc Heat exchangers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998002298A1 (en) * 1996-07-17 1998-01-22 Marquip, Inc. Aparatus and method for leveling and supporting the hot plates in a double backer for corrugated paperboard
EP3738759A1 (en) 2019-05-13 2020-11-18 Guangdong Fosber Intelligent Equipment Co., Ltd. A hot plate for double facer for the production of corrugated board and double facer comprising a plurality of said plates
US11260617B2 (en) 2019-05-13 2022-03-01 Guangdong Fosber Intelligent Equipment Co., Ltd. Hot plate for double facer for the production of corrugated board and double facer comprising a plurality of said plates

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US5785118A (en) 1998-07-28
EP0774342B1 (en) 1999-05-06
DE69602337T2 (en) 1999-10-14

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