EP1854622B1 - Presse à plateaux multiples pour lier des éléments plats, particulièrement pour la liaison à chaud et à froid des placages, laminés ou similaires sur des panneaux en sandwich, copeau ou en nid d'abeille et similaires, et pour produire des panneaux en contreplaqué, en copeau et similaires - Google Patents

Presse à plateaux multiples pour lier des éléments plats, particulièrement pour la liaison à chaud et à froid des placages, laminés ou similaires sur des panneaux en sandwich, copeau ou en nid d'abeille et similaires, et pour produire des panneaux en contreplaqué, en copeau et similaires Download PDF

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Publication number
EP1854622B1
EP1854622B1 EP20070008939 EP07008939A EP1854622B1 EP 1854622 B1 EP1854622 B1 EP 1854622B1 EP 20070008939 EP20070008939 EP 20070008939 EP 07008939 A EP07008939 A EP 07008939A EP 1854622 B1 EP1854622 B1 EP 1854622B1
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EP
European Patent Office
Prior art keywords
platen
cylinders
platens
hydraulic
daylights
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Expired - Fee Related
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EP20070008939
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German (de)
English (en)
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EP1854622A3 (fr
EP1854622A2 (fr
Inventor
Fabrizio Azzimonti
Gastone Girardini
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ORMAMACCHINE SpA
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ORMAMACCHINE SpA
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Publication of EP1854622A2 publication Critical patent/EP1854622A2/fr
Publication of EP1854622A3 publication Critical patent/EP1854622A3/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other
    • B30B7/023—Feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/02—Presses characterised by a particular arrangement of the pressing members having several platens arranged one above the other

Definitions

  • Presses with multiple stacked platens also known as multidaylight presses, have long been known and used extensively in the woodworking industry and provide a plurality of processing daylights, thus allowing to press simultaneously a number of flat elements, such as for example panels on which the facing elements to be bonded have been arranged beforehand, which is equal to the number of the daylights with which such presses are provided.
  • such presses are constituted by a framework which supports a plurality of stacked platens and corresponding presser means, which act on the platens in order to clamp them together after they have been loaded by interposing between them the panels and the flat elements with the corresponding facing elements to be pressed.
  • the presser means are a single set for all the daylights and the pressure is accordingly applied simultaneously to all the loaded panels.
  • Each individual panel is thus prepared in a first preparation belt, and the panel is transferred to a belt of the multiple loader, proceeding in succession until the load is complete; then all the panels are loaded simultaneously into the press by simultaneous actuation of all the belts of the multiple loader.
  • Presses that allow to open and close independently the different daylights can be traced back to two different types: a first type, disclosed for example in EP-384958 , and a second type, disclosed for example in Italian patents IT742525 and IT1218248 .
  • the press disclosed in EP-384958 comprises a plurality of stacked platens, which are structurally self-supporting and are connected one another by lateral hydraulic presser cylinders, and in which the flat elements to be pressed are interposed between two contiguous platens which delimit a daylight.
  • Another complication which is inherent to this embodiment is constituted by the considerable weight difference which affects the presser cylinders of the different daylights of the press; the lowest cylinders, the ones of the first daylight from the bottom, in fact must bear all the weight of the overlying cylinders and platens, which gradually decreases as one rises toward the last daylight.
  • this type of press entails that the loading height of each individual daylight cannot ever be determined beforehand, since it is variable as a function of the thickness of the loaded panels. Because of this fact, it is necessary to wait for the last daylight that is loaded to be closed and pressurized before it is possible to actuate the loader to place it at the correct working height for the subsequent load. This entails a waste of time which, despite appearing scarcely significant for an individual load, on the order of five or six seconds, in any case causes the loss of three or four panels for each working hour.
  • the framework is inserted in an additional fixed containment frame, inside which it can slide vertically by way of appropriately provided movement means.
  • the opening devices are pivoted to the fixed frame and can move laterally in order to allow the vertical sliding of the entire movable framework when they are spaced one another or be inserted between the platens when they are close one another.
  • the hydraulic actuation cylinders of these clamps are partly constituted by hydraulic balancing cylinders, which can be connected to the same circuit as the hydraulic presser cylinders so as to balance the pressure applied by the hydraulic presser cylinders.
  • the hydraulic actuation cylinders of the clamps comprise hydraulic or pneumatic cylinders for opening/closing which can be actuated independently.
  • the hydraulic connections between the presser cylinders and the clamp actuation cylinders are provided so that while the presser cylinders are extended, i.e., with the stem out, the clamp actuation cylinders are closed, with the stem retracted into the corresponding cylinder.
  • the hydraulic or pneumatic cylinders for opening/closing the clamps are actuated and move the two beams of the clamps into contact with the two platens to be mutually spaced.
  • the hydraulic balancing cylinders are connected to the circuit which supplies the hydraulic presser cylinders. From this point onward, the hydraulic or pneumatic opening and closure cylinders simply transfer oil from the presser cylinders to the balancing cylinders, moving mutually apart the two platens affected by the loading with a reduced force.
  • the panel is then loaded by means of a translating belt system which is constituted substantially by a framework provided with a conveyor belt, which after receiving the panel, is inserted fully within the daylight of the press along the entire lengthwise dimension of the platen; then, during the return step, the belt is turned in the opposite direction with respect to the return direction so that the panel is deposited onto the platen within the daylight.
  • a translating belt system which is constituted substantially by a framework provided with a conveyor belt, which after receiving the panel, is inserted fully within the daylight of the press along the entire lengthwise dimension of the platen; then, during the return step, the belt is turned in the opposite direction with respect to the return direction so that the panel is deposited onto the platen within the daylight.
  • the previously pressed panel is also unloaded simultaneously and is expelled by pushing by the translational motion of the translating belt, said panel being conveyed onto a belt or roller bed arranged at the output of the press.
  • the hydraulic or pneumatic opening-closure cylinders are actuated in the opposite direction, so as to again transfer the oil to the presser cylinders and thus produce the mutual approach of the previously spaced platens and disengage the clamps from the two platens.
  • the press is in theory able to allow to open one daylight without altering the pressure applied to the flat elements inserted in the other daylights
  • in order to be able to open a daylight it is necessary to add the thrust required to lift all the overlying platens and overcome the inevitable friction created by their movement; this entails that during this step, which generally lasts 20-25 seconds, the pressure applied to the flat elements inserted in the other daylights increases considerably.
  • the pressure applied by the clamp to lift the overlying mass, by resting in practice on a platen, is in fact necessarily transmitted to all the underlying platens and the same occurs for the overlying platens.
  • the pressure increase that occurs during this step is not negligible and substantially changes the operating parameters, if one considers that the weight of a platen is usually approximately 1,500 kg and that usually the machines are provided with eleven platens in order to obtain ten daylights.
  • GB-A-995590 discloses a multidaylight press as defined in the preamble of claim 1, but wherein the engagement between the stop elements and the intermediate platen is a simple rest engagement.
  • the aim of the present invention is to provide a multidaylight press which is capable of overcoming the problems and obviating the drawbacks mentioned above with reference to the multidaylight presses of the known type.
  • an object of the invention is to provide a press which is structurally simple and in which it is possible to adjust precisely the pressure applied to a flat element inserted in one daylight independently of the position of said daylight and therefore of the weight of the overlying platens and flat elements.
  • the press according to the invention comprises a framework 2 which supports: a fixed platen 3, a movable platen 4 which is parallel to the fixed platen 3 and can move on command toward and away from the fixed platen 3, and at least one intermediate platen 5, which is arranged between the fixed platen 3 and the movable platen 4 and is parallel thereto.
  • the at least one intermediate platen 5 divides the space between the fixed platen 3 and the movable platen 4 into at least two daylights 6, which are adapted to accommodate the flat elements 10 to be pressed.
  • intermediate platens 5 which divide the space comprised between the fixed platen 3 and the movable platen 4 into eight daylights 6, without altering the fact that the number of intermediate platens 5 and consequently the number of daylights 6 can vary according to the requirements.
  • the press according to the invention comprises first connection means 7, which are rigidly coupled to the framework 2, and second connection means 8, which are rigidly coupled to the movable platen 4.
  • Each intermediate platen 5 is provided with locking means 9, which can engage on command the first connection means 7 in order to rigidly couple the corresponding intermediate platen 5 to the framework 2 or the second connection means 8, in order to rigidly couple the corresponding intermediate platen 5 to the movable platen 4, or can be disengaged both from the first connection means 7 and from the second connection means 8, as will become better apparent hereinafter.
  • the press according to the invention further comprises presser means 11 for pressing, with a preset pressure, the movable platen 4 toward the fixed platen 3 in order to press the flat elements 10 inserted in the daylights 6.
  • the fixed platen 3, the movable platen 4 and the intermediate platens 5 preferably have a rectangular plan shape, are arranged horizontally and the movable platen 4 is arranged above the fixed platen 3.
  • the press according to the invention comprises means for compensating for at least part of the weight of the movable platen 4 and of the intermediate platens 5 which bear on the flat elements 10 inserted in the daylights 6.
  • the first connection means 7 comprise fixed bars 13, which lie at right angles to the planes of arrangement of the platens 3, 4, 5, i.e., vertically, and are fixed to the fixed platen 3 and are thus rigidly coupled to the framework 2.
  • the fixed bars 13 rise vertically and laterally with respect to the longer sides of the intermediate platens 5 and of the movable platen 4 and are fixed at their upper end to the framework 2.
  • the locking means comprise first clamps 14, which are mounted on the intermediate platens 5 so as to face, with their arms, two opposite faces of the fixed bars 13. Said first clamps 14 are preferably hydraulically operated and can engage or disengage on command the fixed bars 13.
  • the second connection means 8 comprise movable bars 15, which are connected to the movable platen 4.
  • the movable bars 15 are arranged laterally with respect to the platens 3, 4, 5 and lie at right angles to the platens 3, 4, 5. More particularly, in this case also, there are four movable bars 15: two are fixed to a longer side of the movable platen 4 and two are fixed to the opposite longer side of the movable platen 4.
  • the movable bars 15 rise vertically and laterally with respect to the longer sides of the intermediate platens 5 and cross, so that they can slide vertically, appropriately provided guides 16 connected to the fixed platen 3.
  • the press according to the invention comprises means 19 for opening and closing the daylights 6.
  • Said opening-closing means 19 are adapted to produce a movement of the movable platen 4, together with the movable bars 15 and the intermediate platen or platens 5 rigidly coupled to the movable bars 15 by means of the second clamps 17, toward or away from the fixed platen 3 and the intermediate platen or platens 5 rigidly coupled to the fixed bars 13 by means of the first clamps 14 for closing or opening the daylight 6 delimited on one side by the fixed platen 3 or by an intermediate platen 5 rigidly coupled thereto and on the other side by the movable platen 4 or by an intermediate platen 5 which is rigidly coupled thereto.
  • the opening-closure means 19 comprise hydraulic opening-closure cylinders 20 of the double-acting type which are interposed between the framework 2 and the movable platen 4.
  • the means for compensating the weight of the movable platen 4 and of the intermediate platens 5 rigidly coupled thereto comprise means, constituted by components provided in the hydraulic supply circuit of the hydraulic opening-closure cylinders 20, for feeding a pressurized liquid into the hydraulic opening-closure cylinders 20 so as to apply, by means of said hydraulic opening-closure cylinders 20, to the movable platen 4 and to the intermediate platen or platens 5 rigidly coupled thereto by way of the second clamps 17, an upward force which is correlated to the weight to be compensated, as will become better apparent hereinafter.
  • the movement means 22 comprise hydraulic movement cylinders 23 of the single-acting type, which are interposed between the supporting structure 21 and the framework 2.
  • the translational motion of the framework 2 with respect to the supporting structure 21 can be controlled by means of sensors or detectors of a known type, not shown for the sake of simplicity, so as to ensure the positioning of the daylight 6 to be loaded or unloaded at the selected height level with high precision.
  • the intermediate platens 5 of the press are designated, starting from the top, also with the reference letters A, B, C, D, E, F, G in addition to the reference numeral 5 which is used equally for all of said platens in Figure 2 and in Figures 5 to 13 .
  • a height reader such as for example an encoder, an optical ruler or another known type of detection system, interposed for example between the movable platen 4 and the framework 2, stores in this condition a zero level.
  • the hydraulic opening-closure cylinders 20 are then actuated and lift the movable platen 4 and, with it, the movable bars 15 which are rigidly coupled thereto and slide freely within the second clamps 17.
  • the first daylight 6, delimited in an upward region by the movable platen 4 and in a downward region by the intermediate platen A is opened by an extent which is controlled by means of the height reader starting from the zero level, such as to allow the insertion in the first daylight 6 of the device for loading a flat element 10 to be pressed ( Figure 7 ).
  • a loading sequence is preferred which begins with the first daylight 6 located at the upper end of the plurality of daylights 6 and reaches progressively the daylight 6 arranged at the lower end, since it is convenient to perform positioning of the framework 2 in a rising direction, since the incidence of the effect caused by the inertia of its weight is negligible during movements; moreover, subsequent repositioning, once the load has been completed, can be performed quickly by gravity, controlling carefully only the final slowing step.
  • a flat element 10 is inserted in the open daylight 6 ( Figure 8 ) by using for example a device of the translating belt type described earlier, and then said daylight 6 is closed by actuating, in the opposite direction with respect to the preceding direction, the hydraulic opening-closure cylinders 20.
  • the action of the means for compensating at least part of the weight of the movable platen 4 and of the intermediate platens 5 which bear on the flat elements 10 inserted in the daylights 6 is utilized.
  • These compensation means comprise a maximum-pressure valve which is arranged on the branch of the hydraulic circuit that feeds the hydraulic opening-closure cylinders 20 in the opening direction, i.e., the chamber formed in said cylinders and arranged on one side of the corresponding piston.
  • This maximum-pressure valve which performs a balancing function and is referenced hereinafter as a balancing valve, is set to the pressure required to bear the weight of the movable platen 4 and of the intermediate platens 5 as a whole.
  • This operation is simplified by the placement of the hydraulic opening-closure cylinders 20, which is performed so that the stem of the piston passes through the chamber of said hydraulic cylinders which is fed to open the daylights while the chamber arranged on the opposite side of the piston, which is fed to open the daylights 6, is not affected by the stem of the piston.
  • the difference in cross-section between said two chambers allows to obtain a higher thrust for descent, using a pressure which is lower than the pressure that occurs in the ascent circuit.
  • the balancing valve cited above is bypassed since it would not be possible, once the last daylight 6 arranged at the lower end of the plurality of daylights 6 has been loaded, to open said daylight and lift the platens; this operation in fact requires a thrust which is greater than the balancing pressure, equal to the weight of said platens.
  • the excess pressure does not affect at all the flat elements 10 being processed, since the platens between which said flat elements 10 are inserted are locked with the second clamps 17 to the movable bars 15 which are rigidly coupled to the movable platen 4 and consequently are moved without being subjected to any stress.
  • the daylight 6 arranged between the intermediate platen A and the underlying intermediate platen B is loaded and the operation for closing the daylight is repeated as described earlier ( Figures 11 and 12 ).
  • the weight managed in descent is doubled, but it is still perfectly compensated since only the thrust required to generate the discharge of the balancing valve changes, and does so automatically, said valve being set so as to bear the weight of all the platens: the more said platens increase, the more the closure thrust pressure decreases, but the weight applied by the plurality of overlying platens to the underlying daylight 6 remains constant and practically nil.
  • the framework 2 is again made to descend with the daylight 6, arranged at the upper end of the plurality of daylights 6, i.e., delimited by the movable platen 4 and by the intermediate platen A, to the loading level, from which the sequence for opening and closing the daylights 6 is resumed, unloading the first flat element 10 loaded previously, which has remained under pressure for the time required for the drying of the adhesive.
  • An additional advantage of the press according to the invention is that it allows to work, in a same loading cycle, with different pressures from one daylight to another, since the platens that delimit a daylight are kept locked and are not affected by the pressure applied to pressurize flat elements inserted in other daylights.
  • Yet another advantage of the press according to the invention is that it is possible to process flat elements with thicknesses which can vary over a very wide range and may be different from one daylight to another, optionally renouncing, in the case of substantially thick flat elements, to the use of some daylights.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)

Claims (16)

  1. Presse à plateaux multiples pour lier des éléments plats, en particulier pour la liaison à chaud ou à froid de placages, de stratifiés, ou analogues, sur des panneaux en sandwich, en aggloméré, en nid d'abeilles, ou analogues, et pour produire des panneaux de contreplaqué, d'aggloméré, et analogues, comprenant une ossature (2) qui supporte : un plateau fixe (3), un plateau mobile (4) qui est parallèle audit plateau fixe (3) et qui peut se rapprocher ou s'éloigner sur commande dudit plateau fixe (3), et au moins un plateau intermédiaire (5), qui est disposé entre ledit plateau fixe (3) et ledit plateau mobile (4) et qui est parallèle à celui-ci ; ledit plateau intermédiaire au nombre d'au moins un (5) divisant l'espace entre ledit plateau fixe (3) et ledit plateau mobile (4) en au moins deux intervalles (6), qui sont adaptés pour recevoir les éléments plats (10) devant être pressés ; des premiers moyens de liaison (7) étant prévus, ceux-ci étant rigidement couplés à ladite ossature (2), et des deuxièmes moyens de liaison (8) étant prévus, ceux-ci étant rigidement couplés audit plateau mobile (4) ; ledit plateau intermédiaire (5) étant muni de moyens de verrouillage (9) qui peuvent venir en prise sur commande avec lesdits premiers moyens de liaison (7) afin de coupler rigidement ledit plateau intermédiaire (5) à ladite ossature (2) ou avec lesdits deuxièmes moyens de connexion (8) afin de coupler rigidement ledit plateau intermédiaire (5) audit plateau mobile (4), ou qui peuvent quitter leur prise tout à la fois avec lesdits premiers moyens de liaison (7) et lesdits deuxièmes moyens de liaison (8) ; des moyens presseurs (11) étant de plus prévus afin de presser, avec une pression prédéfinie, ledit plateau mobile (4) vers ledit plateau fixe (3) de façon à presser les éléments plats (10) insérés dans lesdits intervalles (6), caractérisée en ce que lesdits premiers moyens de liaison (7) comprennent des barres fixes (13) qui sont disposées latéralement par rapport auxdits plateaux (3, 4, 5) et qui se trouvent à angle droit par rapport aux plans de disposition desdits plateaux ; lesdits moyens de verrouillage (9) comprenant des premières pinces (14), qui sont disposées sur ledit plateau intermédiaire au nombre d'au moins un (5) et qui peuvent venir en prise sur commande avec lesdites barres fixes (13), et en ce que lesdits deuxièmes moyens de liaison (8) comprennent des barres mobiles (15), qui sont reliées audit plateau mobile (4) et qui sont disposées latéralement par rapport auxdits plateaux (3, 4, 5) et qui se trouvent à angle droit par rapport aux plans de disposition desdits plateaux ; lesdits moyens de verrouillage (9) comprenant des deuxièmes pinces (17) qui sont disposées sur ledit plateau intermédiaire au nombre d'au moins un (5) et qui peuvent venir en prise sur commande avec lesdites barres mobiles (15).
  2. Presse à plusieurs étages selon la revendication 1, caractérisée en ce que ledit plateau fixe (3), ledit plateau mobile (4) et ledit plateau intermédiaire au nombre d'au moins un (5) sont disposés horizontalement par rapport au sol sur lequel repose ladite ossature (2).
  3. Presse à plusieurs étages selon les revendications 1 et 2, caractérisée en ce que ledit plateau mobile (4) est disposé au-dessus dudit plateau fixe (3).
  4. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce qu'elle comprend des moyens pour compenser au moins une partie du poids dudit plateau mobile (4) et dudit plateau intermédiaire au nombre d'au moins un (5) qui porte sur les éléments plats (10) insérés dans lesdits intervalles (6).
  5. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits moyens presseurs (11) comprennent des vérins de puissance hydrauliques (18) qui sont montés sur ladite ossature (2) et qui agissent avec la tige de leur piston, orientés à angle droit par rapport auxdits plateaux (3, 4, 5), sur ledit plateau mobile (4).
  6. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce qu'elle comprend une pluralité de plateaux intermédiaires (5) qui divisent l'espace entre ledit plateau fixe (3) et ledit plateau mobile (4) en une pluralité d'intervalles (6) qui sont adaptés pour recevoir les éléments plats devant être pressés.
  7. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce qu'elle comprend des moyens (19) pour ouvrir et fermer lesdits intervalles (6) ; lesdits moyens d'ouverture/fermeture (19) étant adaptés pour produire un mouvement dudit plateau mobile (4), avec lesdites barres mobiles (15) et le plateau ou les plateaux intermédiaires (5) couplés auxdites barres mobiles (15) à l'aide desdites deuxièmes pinces (17), vers ledit plateau fixe (3) et le plateau ou les plateaux intermédiaires (5) rigidement couplés auxdites barres fixes (13) ou de façon à l'éloigner de ceux-ci, à l'aide desdites premières pinces (14) pour fermer ou ouvrir l'intervalle (6) délimité sur un côté par ledit plateau fixe (3) ou par un plateau intermédiaire (5) qui est rigidement couplé à celui-ci, et sur l'autre côté par ledit plateau mobile (4) ou par un plateau intermédiaire (5) qui est rigidement couplé à celui-ci.
  8. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits moyens d'ouverture/fermeture (19) comprennent des vérins d'ouverture/fermeture hydrauliques (20) qui sont interposés entre ladite ossature (2) et ledit plateau mobile (4).
  9. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits moyens de compensation comprennent des moyens pour introduire un fluide sous pression dans lesdits vérins d'ouverture/fermeture hydrauliques (20) afin d'appliquer, à l'aide desdits vérins d'ouverture/fermeture hydrauliques (20), audit plateau mobile (4) et au plateau ou aux plateaux intermédiaires (5) rigidement couplés à celui-ci à l'aide desdites deuxièmes pinces (17), une force vers le haut qui est corrélée au poids devant être compensé.
  10. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que ladite ossature (2) est supportée, de telle sorte qu'elle puisse coulisser le long d'une direction verticale, par rapport au sol, par une structure de support (21), des moyens (22) étant disposés pour déplacer ladite ossature (2) verticalement par rapport à ladite structure de support (21) afin de positionner l'un des intervalles (6) à une hauteur prédéfinie.
  11. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits moyens de mouvement (22) comprennent des vérins de mouvement hydrauliques (23) qui sont interposés entre ladite structure de support (21) et ladite ossature (2) et qui sont orientés de telle sorte que leurs axes soient verticaux par rapport au sol.
  12. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits vérins de puissance hydrauliques (23) sont constitués par des vérins à simple effet.
  13. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits vérins d'ouverture/fermeture hydrauliques (20) sont constituées par des vérins hydrauliques à double effet.
  14. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits vérins de mouvement hydrauliques (23) sont constitués par des vérins hydrauliques à simple effet (23) .
  15. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits moyens de compensation comprennent une soupape de pression maximale qui est disposée sur la branche du circuit hydraulique qui alimente lesdits vérins d'ouverture/fermeture hydrauliques (20) dans la direction d'ouverture des intervalles (6), ou, autrement dit, la chambre desdits vérins d'ouverture/fermeture hydrauliques qui est disposée sur un côté du piston correspondant; ladite soupape de pression maximale étant établie à la pression nécessaire pour porter le poids dudit plateau mobile (4) et desdits plateaux intermédiaires (5) tout entier ; ladite pression étant maintenue constamment dans le circuit hydraulique même durant la fermeture des intervalles (6), effectuée par application d'une pression opposée à la branche du circuit hydraulique qui alimente lesdits vérins d'ouverture/fermeture hydrauliques (20) dans la direction de fermeture des intervalles (6), ou, autrement dit, la chambre desdits vérins d'ouverture/fermeture hydrauliques (20) qui est disposée sur le côté opposé du piston correspondant.
  16. Presse à plusieurs étages selon l'une ou plusieurs des revendications précédentes, caractérisée en ce que lesdits vérins d'ouverture/fermeture hydrauliques (20) sont disposés de telle sorte que la tige du piston traverse la chambre desdits vérins d'ouverture/fermeture hydrauliques (20) qui est alimentée pour ouvrir les intervalles (6).
EP20070008939 2006-05-12 2007-05-03 Presse à plateaux multiples pour lier des éléments plats, particulièrement pour la liaison à chaud et à froid des placages, laminés ou similaires sur des panneaux en sandwich, copeau ou en nid d'abeille et similaires, et pour produire des panneaux en contreplaqué, en copeau et similaires Expired - Fee Related EP1854622B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20060946 ITMI20060946A1 (it) 2006-05-12 2006-05-12 Pressa multivano ad elevata produttivita' per l'incollaggio di elementi piani,particolarmente per l'incollaggio a caldo o a freddo di tranciati,laminati,impiallacciature o simili su pannelli tamburarti,truciolari,alveolari o simili,e per la produzion

Publications (3)

Publication Number Publication Date
EP1854622A2 EP1854622A2 (fr) 2007-11-14
EP1854622A3 EP1854622A3 (fr) 2008-11-05
EP1854622B1 true EP1854622B1 (fr) 2011-03-02

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EP20070008939 Expired - Fee Related EP1854622B1 (fr) 2006-05-12 2007-05-03 Presse à plateaux multiples pour lier des éléments plats, particulièrement pour la liaison à chaud et à froid des placages, laminés ou similaires sur des panneaux en sandwich, copeau ou en nid d'abeille et similaires, et pour produire des panneaux en contreplaqué, en copeau et similaires

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EP (1) EP1854622B1 (fr)
DE (1) DE602007012788D1 (fr)
ES (1) ES2361340T3 (fr)
IT (1) ITMI20060946A1 (fr)

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DE102007012496B3 (de) * 2007-03-15 2008-11-06 Iac Group Gmbh Etagenpresse für Formteile
US9085117B1 (en) 2014-05-13 2015-07-21 Samuel Grimaldo Hydraulic press with slidable platens
CN105291466B (zh) * 2015-11-16 2017-03-29 瑞安市华大液压机械厂 一种多层模具压机
CN109624370B (zh) * 2018-11-28 2021-02-09 苏州鸿赞蜂窝材料有限公司 一种设有高精准导向系统的铝蜂窝芯热压机
CN113386220A (zh) * 2021-07-03 2021-09-14 杭州雅姿实业有限公司 一种多层贴面热压机

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FR825736A (fr) * 1936-08-18 1938-03-11 Audi Ag Procédé de fabrication de pièces moulées par pression en résine synthétique
GB995590A (en) * 1963-07-23 1965-06-16 Buzuluk Komarov Improvements in or relating to vulcanisation or hardening or rubber or synthetic plastic products
US4153405A (en) * 1977-03-21 1979-05-08 Neff-Perkins Company Three-deck vulcanizing press
IT1218248B (it) * 1988-05-23 1990-04-12 Sergiani Spa Pressa rapida per l'uso nell'incollaggio di elementi piani e la formazione di tamburati
DE8902360U1 (fr) * 1989-02-28 1989-06-29 Wild, Herbert, 4835 Rietberg, De
DE19718557B4 (de) * 1997-05-02 2005-01-20 Heinrich Wemhöner GmbH & Co KG Maschinenfabrik Etagenpresse
ITBO20030461A1 (it) * 2003-07-31 2005-02-01 Sergiani Spa Pressa rapida a piani

Also Published As

Publication number Publication date
EP1854622A3 (fr) 2008-11-05
ES2361340T3 (es) 2011-06-16
DE602007012788D1 (de) 2011-04-14
ITMI20060946A1 (it) 2007-11-13
EP1854622A2 (fr) 2007-11-14

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