EP1742885A1 - Device and method for cambering a glass sheet - Google Patents

Device and method for cambering a glass sheet

Info

Publication number
EP1742885A1
EP1742885A1 EP05747770A EP05747770A EP1742885A1 EP 1742885 A1 EP1742885 A1 EP 1742885A1 EP 05747770 A EP05747770 A EP 05747770A EP 05747770 A EP05747770 A EP 05747770A EP 1742885 A1 EP1742885 A1 EP 1742885A1
Authority
EP
European Patent Office
Prior art keywords
base
complement
glass sheet
press
bending
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.)
Withdrawn
Application number
EP05747770A
Other languages
German (de)
French (fr)
Inventor
J.-F.; c/o GLAVERBEL-Centre R & D GUILLAUME
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Glass Europe SA
Original Assignee
Glaverbel Belgium SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Glaverbel Belgium SA filed Critical Glaverbel Belgium SA
Priority to EP05747770A priority Critical patent/EP1742885A1/en
Publication of EP1742885A1 publication Critical patent/EP1742885A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
    • C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
    • C03B23/0357—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet by suction without blowing, e.g. with vacuum or by venturi effect

Definitions

  • the present invention relates to a device and method for bending a glass sheet.
  • Curved glass sheets can have various applications. They can be used in particular as glazing in vehicles, for example motor vehicles, as a windshield, side windows, rear window or roof. These glazings can be toughened or laminated. For such applications it is necessary that the bending device allows the glass sheets to be formed precisely, without causing optical defects.
  • the frame may be either discontinuous so as to be able to pass through the bed of rollers on which the glass sheet initially rests, or preferably, continuous, and in this case, the conveyor at this location may consist of rollers.
  • the frame then raises the glass sheet to apply it against the surface of an upper shape (also called counter mold or male press).
  • the shape is complementary to the frame and therefore corresponds to the desired shape for the glass sheet.
  • the glass sheet can be placed on a frame before entering the oven, and progresses in the latter while being supported by the frame.
  • the pressing on the upper form is operated by means of the same frame or a frame which replaces it in the raising and pressing of the sheet.
  • the glass sheet can be pressed against the upper form by suction through this form.
  • This is achieved for example using a multiplicity of conduits connected to means ensuring a certain depression on the surface of the form. These conduits are for example in communication with a central chamber at reduced pressure.
  • Such an arrangement makes it possible to aspirate the glass sheet and thus cooperates with the movement of the frame in the forming of the glass sheet. After pressing, the frame descends to a conveying level.
  • the frame retracts under the roller bed and thus redeposit the glass sheet on said roller bed, or the frame resumes its path by carrying the sheet.
  • the lower frame descends while the glass sheet is still held against the upper press by the suction force of the latter, a second "shuttle" frame is positioned under the glass sheet and the suction is stopped. so that the glass sheet is placed on the shuttle.
  • This shuttle frame corresponds at its periphery to the profile of the final curved sheet.
  • the curved glass sheet is led to the cooling or tempering station.
  • the type of bending technique described above is characterized in that the pressing operation takes place outside the oven or at least outside a temperature-controlled zone. This type of technique must therefore be considered as cold technology, this qualifier defining the location of the pressing station outside an enclosure maintained at temperature. It is also known to place a heating system in the upper press of so as to compensate for the loss of temperature due to the fact that the bending takes place outside the oven. This heating system can be, for example, heating resistors.
  • the pressing operation takes place in the oven.
  • the presses can be heated by the oven.
  • the two complementary pressing elements should be manufactured, the solid upper form, also called the male press, and the lower frame, also called the ring or female press.
  • the male press consists of a block whose shape must be of great precision. Furthermore, in current practice, this press includes all the functional elements such as the means ensuring the suction of the sheet or the heating elements of the press when it is necessary to heat the press to prevent the glass sheet from Thermal shock. In practice, therefore, the machining of this part is relatively restrictive, long and costly.
  • the model of curved glass manufactured on the bending line must be changed to another model, it is necessary to change both the male and the female press. The production is stopped long enough to correctly position the pressing elements opposite and long enough to reach the right temperature of the presses. However, this time can be relatively long, especially for the male press which is characterized by a certain thermal inertia mainly due to its mass.
  • the present invention consists of a device for bending a glass sheet as claimed in claim 1.
  • the other claims define alternative and / or preferred aspects of the invention.
  • the invention can make it possible to limit the cost and the time associated with the manufacture of the male pressing element and can also make it easier to make and faster the change of this element, when the model of curved glass manufactured on the line changes. It can also have the advantage that most of the male press remains in place and at the right temperature and that only part of the male press must be handled and reach the appropriate temperature.
  • one of the pressing elements making up the bending / pressing station is formed from at least two distinct resilient parts, adapted to be fixed to one another. These two parts are called base and forming complement or complement.
  • the base and the complement can be made either both in cast iron or in refractory steel, that is to say a steel resistant to high temperatures, or one in steel and the other in cast iron. Preferably, they are both made of the same material, they constitute rigid parts.
  • the complement which is removable and interchangeable according to the shape to be given to the glass sheet, comprises a fixing surface adapted to be fixed to a fixing surface of the base and a forming surface adapted to be pressed against the glass sheet and give it a desired shape.
  • the shape given to the glass sheet at this stage of the bending process is not necessarily the final final shape of the glass sheet.
  • the glass sheet may loosen a bit after pressing.
  • the complement is a resilient piece, capable of being fixed to the base, by screws for example.
  • the complement is fixed to the base as contiguously as possible so that the heat of the base can communicate to the complement by simple conduction.
  • the attachment surfaces of the base and of the complement may be non-planar and / or discontinuous surfaces. Indeed, discontinuities of the orifices or grooves type for example, may be present on the fixing surfaces of the base el or of the complement.
  • the forming surface of the complement i.e. the surface which gives the glass sheet a particular shape, is non-planar and can also be discontinuous.
  • a flexible metallic fabric can cover the forming surface of the male press. This can help avoid or reduce marks in the glass during pressing.
  • the male press comprises means making it possible to generate a reduced pressure on the forming surface of the complement.
  • These means can make it possible to attract the glass sheet to the male press or at least to aid in the movement of the glass sheet towards the male press. They can also allow the glass sheet to remain against the male press while the female press moves away and gives way, for example, to a shuttle frame. The reduced pressure can then be cut off and the glass sheet deposited in the shuttle.
  • the base comprises in its center a chamber connected to suction means. It can be a vacuum pump system so as to create a reduced pressure in the chamber, that is to say a pressure below atmospheric pressure. In communication with the chamber, there may be conduits which can also operate at reduced pressure and which open onto the forming surface.
  • the male press is formed of a base and of a complementary forming, it is important that these means making it possible to generate a reduced pressure are continuous through these two parts.
  • the orifices of the conduits present on the fixing surface of the complement coincide with orifices present on the fixing surface of the base.
  • the complement does not entirely cover the base, that is to say that the attachment surface of the complement is smaller than the attachment surface of the base.
  • elements to the base so as to block the holes in the base not covered by the supplement.
  • these elements are resistant stainless steel plates or sheets. at high temperatures.
  • the complement itself may comprise portions which do not constitute a forming surface, allowing me to plug the suction orifices.
  • the base and the complement it is possible to create one or more grooves on the fixing surface either of the base or of the complement or of both, and to fill them with a seal resistant to high temperatures, which, by crashing when tightening the fixing screws, will ensure -tightness.
  • the invention can be used either in the case where the pressing station is located in the oven or in an enclosure maintained at temperature, or in the case where the pressing station is outside the oven or outside of a controlled zone in temperature.
  • the base of the male press preferably comprises heating means. These can be formed for example of electric heating resistors included in the solid mass of the base.
  • the male press can comprise more than one forming complement, identical to each other, or different.
  • the male press can for example be formed of a base and two forming accessories.
  • the complements are both adapted to be fixed to the base, are removable and interchangeable according to the shapes to be given to the glass sheets, each include a fixing surface suitable for being fixed to the fixing surface of the base and each, a forming surface adapted to be pressed against the glass sheets and give them a desired shape.
  • the female press can then also include more than one frame, for example, two frames, each complementary to one of the two forming supplements of the male press. This can advantageously increase the production of the line by making it possible to press two or more sheets of glass in a single operation.
  • the invention also relates to an industrial installation for bending glass sheets comprising a tunnel oven, a pressing station which can be located in or outside the oven, various pairs of complementary male and female presses according to the various models of curvature of glass sheets, and a cooling or tempering station, characterized in that at least one of the male presses which can be used in the pressing station is formed of at least two distinct resilient parts, a base and at least a forming complement, adapted to be fixed to each other, and characterized in that the complement, which is removable and interchangeable according to the shape to be given to the glass sheets, comprises a fixing surface adapted to be fixed to a base fixing surface and a forming surface adapted to be pressed against the glass sheets and give them a desired shape.
  • the installation thus includes all the male and female presses which can be stored in the vicinity of the pressing station and which can be used alternately in the pressing station itself, in the manner of spare parts.
  • the installation can use both traditional male presses, in one piece, as well as male presses according to the invention, formed from at least two resilient pieces.
  • the invention also relates to a method of bending a glass sheet comprising a pressing step between two opposite and complementary presses according to the invention.
  • the pressing step can be carried out either inside an oven, or outside of it or of an enclosure maintained at temperature.
  • One of the advantages of the pressing step being carried out outside the oven is the better accessibility to the tool and therefore greater ease of changing and adjusting it.
  • the male press when the pressing is carried out outside the oven, the male press comprises heating means. It is not necessary that the additional pressing according to the invention also includes such heating means. This can facilitate its manufacture and reduce the cost.
  • the complement can be heated by conduction in contact with the base which includes the heating means.
  • the complement can be designed to be as bulky as possible and therefore be heated more quickly. It is preferably made of cast iron or high temperature steel, which allows the conduction of heat from the base to the complement. It is also possible to preheat the forming complement before placing it on the base in the pressing station.
  • Fig. 1 perspective view of a male press according to the invention comprising heating means
  • Fig. 2 Perspective and exploded view of a male press according to the invention comprising heating means
  • Fig. 3 perspective view of a male press according to the invention not comprising heating means
  • FIG. 4 Schematic sectional view of a male press according to the invention comprising a suction system and heating means
  • FIG. 5 Schematic view of the underside of a male press according to the invention comprising a suction system and two forming accessories
  • Example 1 Curved glazing is produced on a production line according to the following steps.
  • a sheet of glass is transported on a roller conveyor and passes through a tunnel oven where it is brought to its softening temperature, for example around 650-660 ° C.
  • a pressing station At the exit of the tunnel oven, there is a pressing station.
  • the glass sheet is led, still on the rollers, to the pressing station where it is lifted from the conveyor by a frame whose shape corresponds to that which one wishes to give to the periphery of the sheet of glass.
  • the frame is continuous and crosses the bed of pebbles on which the glass sheet initially rests.
  • This frame also called female press, is adapted to be pressed against the periphery of the glass sheet and give it a desired shape.
  • the frame therefore lifts the glass sheet to press it against an upper male press whose shape is complementary to the frame and therefore corresponds to the desired shape for the glass sheet.
  • the lower frame descends to a level below the pebble bed and thus redeposits the curved glass sheet on the pebble bed. These then resume movement and lead the glass sheet to a cooling station.
  • the glass sheet has the desired final curvature, which is generally not equivalent to the curvature given by the pressing step.
  • the shape of the curvature given by the pressing between the male and female presses is in fact an intermediate curvature which must be calculated with precision, so that after the glass has slightly relaxed and is cooled, it gives the desired final curvature.
  • the male press 10 is represented in FIG. 1.
  • the base 11 consists of two distinct resilient cast iron parts: a base 11 and a forming complement 12.
  • the forming complement, or complement is fixed to the base by screws 13.
  • the base comprises heating means made of electrical resistances 14 which pass through it and which make it possible to confer on the base a temperature of approximately 300-400 ° C. This temperature is adjustable by means of thermocouples 14 'located in the base.
  • the complement adapts to the base and is joined to it, so that the base can heat the complement by thermal conduction and thus the temperature of the complement is similar to that of the base. It is necessary that the press is at a sufficient temperature to avoid that cold spots appear in the glass, which could constitute fragile points. As seen in FIG.
  • the forming complement 12 can be detached from the base 11 to be inverted with another complement when the curvature model is changed during manufacture on the production line.
  • the additional forming 12 comprises a fixing surface 15 adapted to be fixed to the fixing surface of the base 16, and a forming surface 17 adapted to be pressed against the glass sheet to give it a desired shape. We can see the locations 18 provided for the fixing screws in the complement.
  • Example 2 Curved glazing is manufactured on a production line as described in Example 1, except that the pressing station is located in the tunnel oven, that is to say in an environment at a temperature of approximately 700 ° C.
  • the male press does not have internal heating means. It is this male press which is represented in FIG. 3.
  • Example 3 Curved glazing is manufactured on a production line as described in Example 1, except that the movement of the glass during the pressing step is provided in a slightly different manner.
  • the male press 10 includes means for generating reduced pressure on the forming surface 17 of the complement. These means are composed of a chamber 19 connected to a system (not shown) for creating the vacuum or at least a pressure below atmospheric pressure, and of conduits 20 which pass through the male press up to the forming surface 17. This system makes it possible to attract and / or hold the glass sheet against the forming surface, by suction.
  • the reduced pressure system is activated and the glass sheet is sucked up by the male press at the same time as the female press frame lifts the glass sheet.
  • the frame After pressing, the frame descends while the glass sheet is still held against the upper press by the suction force of the latter.
  • a shuttle frame is positioned under the glass sheet and the suction is stopped so that the glass sheet is placed on the shuttle. It is the shuttle frame which leads the curved glass to the cooling station.
  • Example 4 Curved glazings are produced on a production line as described in Example 3, except that two glazings are produced simultaneously, thanks to two forming accessories attached to the base.
  • Figure 5 shows a bottom view of the male press. Two forming accessories 12 and 12 'are fixed to the base 11 by screws 13.
  • the base has a dimension of 125 x 86 cm.
  • two sheets of glass are conveyed in parallel on the roller bed and are lifted and pressed against the male press by two female frames.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

The invention relates to a device for cambering a glass sheet, said device comprising a pressing station provided with a male press and a female press which are arranged opposite each other in a complementary manner. The male press is formed from at least two distinct resilient parts, a base and at least one forming complement, which are adapted in such a way as to be fixed to each other. Said forming complement is detachable and interchangeable according to the form to be applied to the glass sheet, and comprises a fixing surface which is adapted in such a way as to be fixed to a fixing surface of the base, and a forming surface which is adapted in such a way as to be pressed against the glass sheet in order to apply the desired form thereto. The invention also relates to an industrial installation comprising one such device, and to a method for implementing said device.

Description

Dispositif et procédé de bombage d'une feuille de verre Device and method for bending a glass sheet
La présente invention concerne un dispositif et procédé de bombage d'une feuille de verre.The present invention relates to a device and method for bending a glass sheet.
Des feuilles de verre bombées peuvent avoir des applications variées. Elles peuvent être utilisées notamment comme vitrages dans des véhicules, par exemple automobiles, en tant que pare-brise, vitres latérales, lunette-arrière ou toit. Ces vitrages peuvent être trempés ou feuilletés. Pour de telles applications il est nécessaire que le dispositif de bombage permette de former les feuilles de verre de manière précise, sans causer de défauts optiques.Curved glass sheets can have various applications. They can be used in particular as glazing in vehicles, for example motor vehicles, as a windshield, side windows, rear window or roof. These glazings can be toughened or laminated. For such applications it is necessary that the bending device allows the glass sheets to be formed precisely, without causing optical defects.
Il est connu notamment une technique selon laquelle une feuille de verre est transportée sur un convoyeur à rouleaux au travers d'un four tunnel dans lequel sa température est amenée jusqu'à sa température de ramollissement, puis est conduite jusqu'à une station de bombage, comportant une opération de pressage, et donc aussi parfois appelée station de pressage. Dans la station de bombage, la feuille de verre est soulevée du convoyeur par un cadre dont la forme correspond à celle que l'on souhaite conférer à la périphérie de la feuille de verre.It is known in particular a technique according to which a glass sheet is transported on a roller conveyor through a tunnel oven in which its temperature is brought up to its softening temperature, then is led to a bending station , comprising a pressing operation, and therefore also sometimes called a pressing station. In the bending station, the glass sheet is lifted from the conveyor by a frame whose shape corresponds to that which one wishes to give to the periphery of the glass sheet.
Le cadre peut être soit discontinu de façon à pouvoir traverser le lit de rouleaux sur lequel repose initialement la feuille de verre, soit de préférence, continu, et dans ce cas, le convoyeur à cet endroit peut être constitué de galets. Le cadre élève ensuite la feuille de verre pour venir l'appliquer contre la surface d'une forme (nommée aussi contre-moule ou presse mâle) supérieure. La forme est complémentaire du cadre et correspond donc à la forme désirée pour la feuille de verre.The frame may be either discontinuous so as to be able to pass through the bed of rollers on which the glass sheet initially rests, or preferably, continuous, and in this case, the conveyor at this location may consist of rollers. The frame then raises the glass sheet to apply it against the surface of an upper shape (also called counter mold or male press). The shape is complementary to the frame and therefore corresponds to the desired shape for the glass sheet.
D'autres variantes comportent le même type d'opération de pressage.Other variants include the same type of pressing operation.
Par exemple la feuille de verre peut être déposée sur un cadre avant d'entrer dans le four, et progresse dans ce dernier en étant supportée par le cadre. Le pressage sur la forme supérieure est opéré au moyen du même cadre ou d'un cadre qui se substitue à celui-ci dans l'élévation et le pressage de la feuille.For example, the glass sheet can be placed on a frame before entering the oven, and progresses in the latter while being supported by the frame. The pressing on the upper form is operated by means of the same frame or a frame which replaces it in the raising and pressing of the sheet.
Dans certaines variantes, la feuille de verre peut être plaquée contre la forme supérieure par aspiration à travers cette forme. Ceci est réalisé par exemple à l'aide d'une multiplicité de conduits raccordés à des moyens assurant une certaine dépression à la surface de la forme. Ces conduits sont par exemple en communication avec une chambre centrale à pression réduite. Une telle disposition permet d'aspirer la feuille de verre et ainsi coopère avec le mouvement du cadre dans le formage de la feuille de verre. Après pressage, le cadre redescend jusqu'à un niveau de convoyage.In certain variants, the glass sheet can be pressed against the upper form by suction through this form. This is achieved for example using a multiplicity of conduits connected to means ensuring a certain depression on the surface of the form. These conduits are for example in communication with a central chamber at reduced pressure. Such an arrangement makes it possible to aspirate the glass sheet and thus cooperates with the movement of the frame in the forming of the glass sheet. After pressing, the frame descends to a conveying level.
Suivant les techniques, soit le cadre s'escamote sous le lit de rouleaux et redépose ainsi la feuille de verre sur ledit lit de rouleaux, soit le cadre reprend son cheminement en portant la feuille.According to the techniques, either the frame retracts under the roller bed and thus redeposit the glass sheet on said roller bed, or the frame resumes its path by carrying the sheet.
Dans une variante le cadre inférieur redescend alors que la feuille de verre est toujours maintenue contre la presse supérieure par la force d'aspiration de celle-ci, un deuxième cadre "navette" se positionne sous la feuille de verre et l'aspiration est stoppée de façon à ce que la feuille de verre se place sur la navette.In a variant, the lower frame descends while the glass sheet is still held against the upper press by the suction force of the latter, a second "shuttle" frame is positioned under the glass sheet and the suction is stopped. so that the glass sheet is placed on the shuttle.
Ce cadre navette correspond en sa périphérie au profil de la feuille bombée finale.This shuttle frame corresponds at its periphery to the profile of the final curved sheet.
Dans tous les cas, la feuille de verre bombée est conduite jusqu'à la station de refroidissement ou de trempe.In all cases, the curved glass sheet is led to the cooling or tempering station.
Le type de technique de bombage décrit ci-dessus se caractérise par le fait que l'opération de pressage s'opère en dehors du four ou tout au moins en dehors d'une zone contrôlée en température. Ce type de technique doit ainsi être considérée comme une technologie à froid, ce qualificatif définissant le lieu de la station de pressage en dehors d'une enceinte maintenue en température. Il est également connu de placer un système chauffant dans la presse supérieure de manière à compenser la perte de température due au fait que le bombage se passe en dehors du four. Ce système chauffant peut être, par exemple, des résistances chauffantes.The type of bending technique described above is characterized in that the pressing operation takes place outside the oven or at least outside a temperature-controlled zone. This type of technique must therefore be considered as cold technology, this qualifier defining the location of the pressing station outside an enclosure maintained at temperature. It is also known to place a heating system in the upper press of so as to compensate for the loss of temperature due to the fact that the bending takes place outside the oven. This heating system can be, for example, heating resistors.
Dans une autre technique de bombage, l'opération de pressage s'opère dans le four. Les presses peuvent être dans ce cas chauffées par le four.In another bending technique, the pressing operation takes place in the oven. In this case, the presses can be heated by the oven.
Pour chaque modèle de verre bombé, il convient de fabriquer les deux éléments de pressage complémentaires, la forme supérieure pleine, appelée aussi presse mâle, et le cadre inférieur, appelé aussi anneau ou presse femelle.For each model of curved glass, the two complementary pressing elements should be manufactured, the solid upper form, also called the male press, and the lower frame, also called the ring or female press.
La presse mâle est constituée d'un bloc dont la forme doit être d'une grande précision. Par ailleurs dans la pratique actuelle, cette presse comprend tous les éléments fonctionnels tels que les moyens assurant l'aspiration de la feuille ou les éléments de chauffage de la presse lorsqu'il est nécessaire de réchauffer la presse pour éviter à la feuille de verre un choc thermique. En pratique donc l'usinage de cette pièce est relativement contraignant, long et coûteux. Lorsque le modèle de verre bombé en fabrication sur la ligne de bombage doit être changé pour un autre modèle, il convient de changer à la fois la presse mâle et la presse femelle. La production est arrêtée le temps de positionner correctement les éléments de pressage en vis-à-vis et le temps d'atteindre la bonne température des presses. Or ce temps peut être relativement long, surtout pour la presse mâle qui est caractérisée par une certaine inertie thermique due principalement à sa masse.The male press consists of a block whose shape must be of great precision. Furthermore, in current practice, this press includes all the functional elements such as the means ensuring the suction of the sheet or the heating elements of the press when it is necessary to heat the press to prevent the glass sheet from Thermal shock. In practice, therefore, the machining of this part is relatively restrictive, long and costly. When the model of curved glass manufactured on the bending line must be changed to another model, it is necessary to change both the male and the female press. The production is stopped long enough to correctly position the pressing elements opposite and long enough to reach the right temperature of the presses. However, this time can be relatively long, especially for the male press which is characterized by a certain thermal inertia mainly due to its mass.
Selon un de ses aspects, la présente invention consiste en un dispositif de bombage d'une feuille de verre tel que revendiqué dans la revendication 1. Les autres revendications définissent des aspects de l'invention alternatifs et/ou préférés. L'invention peut permettre de limiter le coût et le temps liés à la fabrication de l'élément de pressage mâle et peut aussi permettre de rendre plus aisé et plus rapide le changement de cet élément, lorsque le modèle de verre bombé en fabrication sur la ligne change. Elle peut aussi présenter l'avantage que la plus grande partie de la presse mâle reste en place et à bonne température et que seule une partie de la presse mâle doit être manipulée et atteindre la température adéquate. Ce sont des avantages certains, car de plus en plus de vitrages automobiles sont bombés et de plus en plus de modèles différents de vitrages bombés existent.According to one of its aspects, the present invention consists of a device for bending a glass sheet as claimed in claim 1. The other claims define alternative and / or preferred aspects of the invention. The invention can make it possible to limit the cost and the time associated with the manufacture of the male pressing element and can also make it easier to make and faster the change of this element, when the model of curved glass manufactured on the line changes. It can also have the advantage that most of the male press remains in place and at the right temperature and that only part of the male press must be handled and reach the appropriate temperature. These are definite advantages, because more and more automotive glazing is curved and more and more different models of curved glazing exist.
Selon une forme de l'invention, un des éléments de pressage composant la station de bombage/pressage, de préférence la presse mâle, est formé d'au moins deux pièces distinctes résilientes, adaptées à être fixées l'une à l'autre. Ces deux pièces sont appelées base et complément de formage ou complément. La base et le complément peuvent être faits soit tous les deux en fonte ou en acier réfractaire, c'est-à-dire un acier résistant aux hautes températures, soit l'un en acier et l'autre en fonte. De préférence, ils sont tous les deux fabriqués dans la même matière, us constituent des pièces rigides. Le complément, qui est amovible et interchangeable selon la forme à donner à la feuille de verre, comprend une surface de fixation adaptée à être fixée à une surface de fixation de la base et une surface de formage adaptée à être pressé contre la feuille de verre et lui donner une forme désirée. La forme donnée à la feuille de verre à ce stade du processus de bombage n'est pas nécessairement la forme définitive finale de la feuille de verre. Il se peut que la feuille de verre se relâche un peu après le pressage. Le complément est une pièce résiliente, capable d'être fixée à la base, par des vis par exemple.According to one form of the invention, one of the pressing elements making up the bending / pressing station, preferably the male press, is formed from at least two distinct resilient parts, adapted to be fixed to one another. These two parts are called base and forming complement or complement. The base and the complement can be made either both in cast iron or in refractory steel, that is to say a steel resistant to high temperatures, or one in steel and the other in cast iron. Preferably, they are both made of the same material, they constitute rigid parts. The complement, which is removable and interchangeable according to the shape to be given to the glass sheet, comprises a fixing surface adapted to be fixed to a fixing surface of the base and a forming surface adapted to be pressed against the glass sheet and give it a desired shape. The shape given to the glass sheet at this stage of the bending process is not necessarily the final final shape of the glass sheet. The glass sheet may loosen a bit after pressing. The complement is a resilient piece, capable of being fixed to the base, by screws for example.
De préférence le complément est fixé à la base de manière la plus jointive possible de façon à ce que la chaleur de la base puisse se communiquer au complément par simple conduction. Dans certains modes de réalisation de l'invention, les surfaces de fixation de la base et du complément, peuvent être des surfaces non-planes el/ou discontinues. En effet, des discontinuités de type orifices ou rainures par exemple, peuvent être présentes aux surfaces de fixation de la base el ou du complément. La surface de formage du complément, c'est-à-dire la surface qui donne à la feuille de verre une forme particulière, est non-plane et peut être discontinue elle aussi.Preferably the complement is fixed to the base as contiguously as possible so that the heat of the base can communicate to the complement by simple conduction. In certain embodiments of the invention, the attachment surfaces of the base and of the complement, may be non-planar and / or discontinuous surfaces. Indeed, discontinuities of the orifices or grooves type for example, may be present on the fixing surfaces of the base el or of the complement. The forming surface of the complement, i.e. the surface which gives the glass sheet a particular shape, is non-planar and can also be discontinuous.
Dans certaines formes de l'invention, un tissu métallique souple peut recouvrir la surface de formage de la presse mâle. Cela peut permettre d'éviter ou de réduire les marques dans le verre lors du pressage.In some forms of the invention, a flexible metallic fabric can cover the forming surface of the male press. This can help avoid or reduce marks in the glass during pressing.
De préférence, la presse mâle comprend des moyens permettant d'engendrer une pression réduite sur la surface de formage du complément. Ces moyens peuvent permettre d'attirer la feuille de verre sur la presse mâle ou du moins d'aider au mouvement de la feuille de verre vers la presse mâle. Ils peuvent également permettre à la feuille de verre de rester contre la presse mâle pendant que la presse femelle s'écarte et fait place, par exemple, à un cadre navette. La pression réduite peut alors être coupée et la feuille de verre se déposer dans la navette. Dans un mode particulier de l'invention, la base comprend en son centre une chambre reliée à des moyens d'aspiration. Il peut s'agir d'un système de pompe à vide de manière à créer une pression réduite dans la chambre, c'est-à-dire une pression inférieure à la pression atmosphérique. En communication avec la chambre, il peut y avoir des conduits pouvant fonctionner également à pression réduite et qui débouchent sur la surface de formage. Des orifices peuvent alors être visibles sur la surface de formage. Lorsque la presse mâle est formée d'une base et d'un complément de formage, il est important que ces moyens permettant d'engendrer une pression réduite soient continus à travers ces deux pièces. De préférence, les orifices des conduits présents à la surface de fixation du complément coïncident avec des orifices présents sur la surface de fixation de la base.Preferably, the male press comprises means making it possible to generate a reduced pressure on the forming surface of the complement. These means can make it possible to attract the glass sheet to the male press or at least to aid in the movement of the glass sheet towards the male press. They can also allow the glass sheet to remain against the male press while the female press moves away and gives way, for example, to a shuttle frame. The reduced pressure can then be cut off and the glass sheet deposited in the shuttle. In a particular embodiment of the invention, the base comprises in its center a chamber connected to suction means. It can be a vacuum pump system so as to create a reduced pressure in the chamber, that is to say a pressure below atmospheric pressure. In communication with the chamber, there may be conduits which can also operate at reduced pressure and which open onto the forming surface. Holes may then be visible on the forming surface. When the male press is formed of a base and of a complementary forming, it is important that these means making it possible to generate a reduced pressure are continuous through these two parts. Preferably, the orifices of the conduits present on the fixing surface of the complement coincide with orifices present on the fixing surface of the base.
Dans certaines formes de l'invention, le complément ne couvre pas entièrement la base, c'est-à-dire que la surface de fixation du complément est plus petite que la surface de fixation de la base. Dans ce cas, il est possible de fixer des éléments à la base de façon à boucher les orifices de la base non couverts par le complément. De préférence, ces éléments sont des plaques ou tôles en inox résistant à de hautes températures. Alternativement, le complément lui-même peut comprendre des portions ne constituant pas une surface de formage, me s permettant de boucher les orifices d'aspiration.In certain forms of the invention, the complement does not entirely cover the base, that is to say that the attachment surface of the complement is smaller than the attachment surface of the base. In this case, it is possible to attach elements to the base so as to block the holes in the base not covered by the supplement. Preferably, these elements are resistant stainless steel plates or sheets. at high temperatures. Alternatively, the complement itself may comprise portions which do not constitute a forming surface, allowing me to plug the suction orifices.
De préférence, pour assurer une bonne étanchéité entre la base et le complément, il est possible de créer une ou plusieurs rainures à la surface de fixation soit de la base soit du complément soit des deux, et de les remplir avec un joint résistant aux hautes températures, qui, en s'écrasant lors du serrage des vis de fixation, assurera -étanchéité.Preferably, to ensure a good seal between the base and the complement, it is possible to create one or more grooves on the fixing surface either of the base or of the complement or of both, and to fill them with a seal resistant to high temperatures, which, by crashing when tightening the fixing screws, will ensure -tightness.
L'invention peut être utilisée soit dans le cas où la station de pressage se trouve dans le four ou dans une enceinte maintenue en température, soit dans le cas où la station de pressage se trouve hors du four ou hors d'une zone contrôlée en température. Dans ce dernier cas, la base de la presse mâle comprend de préférence des moyens chauffants. Ceux-ci peuvent être formé par exemple de résistances électriques chauffantes inclues dans la masse pleine de la base. Dans certaines formes de l'invention, la presse mâle peut comprendre plus d'un complément de formage, identiques entre eux, ou différents. La presse mâle peut par exemple être formée d'une base et de deux compléments de formage. Les compléments sont tous les deux adaptés à être fixés à la base, sont amovibles et interchangeables selon les formes à donner aux feuilles de verre, comprennent chacun une surface de fixation adaptée à être fixée à la surface de fixation de la base et chacun, une surface de formage adaptée à être pressée contre les feuilles de verre et leur donner une forme désirée. La presse femelle peut alors elle aussi comprendre plus d'un cadre, par exemple, deux cadres, chacun complémentaire à un des deux compléments de formage de la presse mâle. Ceci peut avantageusement accroître la production de la ligne en permettant de presser deux feuilles de verre, voire plus, en une seule opération. L'invention concerne également une installation industrielle de bombage de feuilles de verre comprenant un four tunnel, une station de pressage pouvant être située dans le four ou en dehors de celui-ci, diverses paires de presses mâle et femelle complémentaires selon les divers modèles de courbure de feuilles de verre, et une station de refroidissement ou de trempe, caractérisé en ce qu'au moins une des presses mâles pouvant être utilisée dans la station de pressage est formée d'au moins deux pièces distinctes résilientes, une base et au moins un complément de formage, adaptés à être fixés l'un à l'autre, et caractérisé en ce que le complément, qui est amovible et interchangeable selon la forme à donner aux feuilles de verre, comprend une surface de fixation adaptée à être fixée à une surface de fixation de la base et une surface de formage adaptée à être pressé contre les feuilles de verre et leur donner une forme désirée. L'installation comprend ainsi toutes les presses mâles et femelles pouvant être stockées dans les environs de la station de pressage et pouvant être utilisées alternativement dans la station de pressage proprement dite, à la manière de pièces de rechange. L'installation peut aussi bien utiliser des presses mâles traditionnelles, en une seule pièce, que des presses mâles selon l'invention, formée d'au moins deux pièces résilientes.The invention can be used either in the case where the pressing station is located in the oven or in an enclosure maintained at temperature, or in the case where the pressing station is outside the oven or outside of a controlled zone in temperature. In the latter case, the base of the male press preferably comprises heating means. These can be formed for example of electric heating resistors included in the solid mass of the base. In certain forms of the invention, the male press can comprise more than one forming complement, identical to each other, or different. The male press can for example be formed of a base and two forming accessories. The complements are both adapted to be fixed to the base, are removable and interchangeable according to the shapes to be given to the glass sheets, each include a fixing surface suitable for being fixed to the fixing surface of the base and each, a forming surface adapted to be pressed against the glass sheets and give them a desired shape. The female press can then also include more than one frame, for example, two frames, each complementary to one of the two forming supplements of the male press. This can advantageously increase the production of the line by making it possible to press two or more sheets of glass in a single operation. The invention also relates to an industrial installation for bending glass sheets comprising a tunnel oven, a pressing station which can be located in or outside the oven, various pairs of complementary male and female presses according to the various models of curvature of glass sheets, and a cooling or tempering station, characterized in that at least one of the male presses which can be used in the pressing station is formed of at least two distinct resilient parts, a base and at least a forming complement, adapted to be fixed to each other, and characterized in that the complement, which is removable and interchangeable according to the shape to be given to the glass sheets, comprises a fixing surface adapted to be fixed to a base fixing surface and a forming surface adapted to be pressed against the glass sheets and give them a desired shape. The installation thus includes all the male and female presses which can be stored in the vicinity of the pressing station and which can be used alternately in the pressing station itself, in the manner of spare parts. The installation can use both traditional male presses, in one piece, as well as male presses according to the invention, formed from at least two resilient pieces.
L'invention concerne aussi un procédé de bombage d'une feuille de verre comprenant une étape de pressage entre deux presses opposées et complémentaires selon l'invention. L'étape de pressage peut être réalisée soit à l'intérieur de four, soit en dehors de celui-ci ou d'une enceinte maintenue en température. Un des avantages à ce que l'étape de pressage se fasse en dehors du four est la meilleure accessibilité à l'outillage et donc une plus grande facilité pour le changer et le régler. Lorsque le modèle de verre bombé en fabrication sur la ligne change pour un autre modèle, pour changer la presse mâle, il suffit de détacher le complément de formage de la base qui, elle, reste en place, et d'y fixer un autre complément correspondant au nouveau modèle de verre souhaité.The invention also relates to a method of bending a glass sheet comprising a pressing step between two opposite and complementary presses according to the invention. The pressing step can be carried out either inside an oven, or outside of it or of an enclosure maintained at temperature. One of the advantages of the pressing step being carried out outside the oven is the better accessibility to the tool and therefore greater ease of changing and adjusting it. When the model of curved glass manufactured on the line changes to another model, to change the male press, simply detach the forming complement from the base, which remains in place, and attach another complement to it corresponding to the new desired glass model.
De manière avantageuse, lorsque le pressage s'effectue en dehors du four, la presse mâle comprend des moyens chauffants. Il n'est pas nécessaire que le complément de pressage selon l'invention comprenne lui aussi de tels moyens chauffants. Ceci peut faciliter sa fabrication et en réduire le coût. Le complément peut être chauffé par conduction au contact de la base qui comprend les moyens chauffants. Le complément peut être dessiné pour être le moins volumineux possible et donc être chauffé plus rapidement. Il est de préférence fabriqué en fonte ou en acier haute température, qui permet la conduction de chaleur depuis la base vers le complément. Il est également possible de préchauffer le complément de formage avant de le placer sur la base dans la station de pressage.Advantageously, when the pressing is carried out outside the oven, the male press comprises heating means. It is not necessary that the additional pressing according to the invention also includes such heating means. This can facilitate its manufacture and reduce the cost. The complement can be heated by conduction in contact with the base which includes the heating means. The complement can be designed to be as bulky as possible and therefore be heated more quickly. It is preferably made of cast iron or high temperature steel, which allows the conduction of heat from the base to the complement. It is also possible to preheat the forming complement before placing it on the base in the pressing station.
Divers aspects de l'invention vont à présent être décrits, par le biais d'exemples uniquement, tout en faisant référence aux figures. Ces exemples n'ont aucun caractère limitatif. Les figures ne sont pas dessinées à l'échelle.Various aspects of the invention will now be described, by way of examples only, while referring to the figures. These examples are in no way limiting. Figures are not drawn to scale.
Fig. 1: Vue en perspective d'une presse mâle selon l'invention comprenant des moyens chauffantsFig. 1: perspective view of a male press according to the invention comprising heating means
Fig. 2: Vue en perspective et éclatée d'une presse mâle selon l'invention comprenant des moyens chauffantsFig. 2: Perspective and exploded view of a male press according to the invention comprising heating means
Fig. 3: Vue en perspective d'une presse mâle selon l'invention ne comprenant pas de moyens chauffantsFig. 3: perspective view of a male press according to the invention not comprising heating means
Fig. 4: Vue schématique en coupe d'une presse mâle selon l'invention comprenant un système d'aspiration et des moyens chauffants Fig. 5: Vue schématique du dessous d'une presse mâle selon l'invention comprenant un système d'aspiration et deux compléments de formageFig. 4: Schematic sectional view of a male press according to the invention comprising a suction system and heating means FIG. 5: Schematic view of the underside of a male press according to the invention comprising a suction system and two forming accessories
Exemple 1 Un vitrage bombé est fabriqué sur une ligne de production selon les étapes suivantes. Une feuille de verre est transportée sur un convoyeur à rouleaux et passe dans un four tunnel où elle est amenée jusqu'à sa température de ramollissement, par exemple environ 650-660°C. A la sortie du four tunnel, se trouve une station de pressage. La feuille de verre est conduite, toujours sur les rouleaux, dans la station de pressage où elle est soulevée du convoyeur par un cadre dont la forme correspond à celle que l'on souhaite donner à la périphérie de la feuille de verre. Le cadre est continu et traverse le lit de galets sur lequel repose initialement la feuille de verre. Ce cadre, aussi appelé presse femelle, est adapté à être pressé contre la périphérie de la feuille de verre et lui donner une forme désirée. Le cadre soulève donc la feuille de verre pour venir la presser contre une presse mâle supérieure dont la forme est complémentaire du cadre et correspond donc à la forme désirée pour la feuille de verre. Après pressage, le cadre inférieur redescend jusqu'à un niveau inférieur au lit de galets et redépose ainsi la feuille de verre, bombée, sur le lit de galets. Ceux-ci se remettent ensuite en mouvement et conduisent la feuille de verre jusqu'à une station de refroidissement. A la fin de la ligne, après refroidissement, la feuille de verre possède la courbure finale désirée, qui n'est généralement pas équivalente à la courbure donnée par l'étape de pressage. La forme de la courbure donnée par le pressage entre les presses mâles et femelles est en fait une courbure intermédiaire qui doit être calculée avec précision, pour qu'après que le verre se soit légèrement relâché et soit refroidi, elle donne la courbure finale souhaitée. La presse mâle 10 est représentée dans la figure 1. Elle se compose de deux pièces distinctes résilientes en fonte: une base 11 et un complément de formage 12. Le complément de formage, ou complément, est fixé à la base par des vis 13. La base comprend des moyens chauffants faits de résistances électriques 14 qui la traversent et qui permettent de conférer à la base une température d'environ 300-400°C. Cette température est réglable au moyen de thermocouples 14' situés dans la base. Le complément s'adapte à la base et lui est jointif, de manière à ce que la base puisse chauffer le complément par conduction thermique et qu'ainsi la température du complément soit semblable à celle de la base. Il est nécessaire que la presse soit à une température suffisante pour éviter que des points froids n'apparaissent dans le verre, qui pourraient constituer des points fragiles. Comme on le voit à la figure 2, le complément de formage 12 peut être détaché de la base 11 pour être interverti avec un autre complément lorsque l'on change de modèle de courbure en fabrication sur la ligne de production. Le complément de formage 12 comprend une surface de fixation 15 adaptée à être fixée à la surface de fixation de la base 16, et une surface de formage 17 adaptée à être pressée contre la feuille de verre pour lui donner une forme désirée. On peut voir les emplacements 18 prévus pour les vis de fixation dans le complément.Example 1 Curved glazing is produced on a production line according to the following steps. A sheet of glass is transported on a roller conveyor and passes through a tunnel oven where it is brought to its softening temperature, for example around 650-660 ° C. At the exit of the tunnel oven, there is a pressing station. The glass sheet is led, still on the rollers, to the pressing station where it is lifted from the conveyor by a frame whose shape corresponds to that which one wishes to give to the periphery of the sheet of glass. The frame is continuous and crosses the bed of pebbles on which the glass sheet initially rests. This frame, also called female press, is adapted to be pressed against the periphery of the glass sheet and give it a desired shape. The frame therefore lifts the glass sheet to press it against an upper male press whose shape is complementary to the frame and therefore corresponds to the desired shape for the glass sheet. After pressing, the lower frame descends to a level below the pebble bed and thus redeposits the curved glass sheet on the pebble bed. These then resume movement and lead the glass sheet to a cooling station. At the end of the line, after cooling, the glass sheet has the desired final curvature, which is generally not equivalent to the curvature given by the pressing step. The shape of the curvature given by the pressing between the male and female presses is in fact an intermediate curvature which must be calculated with precision, so that after the glass has slightly relaxed and is cooled, it gives the desired final curvature. The male press 10 is represented in FIG. 1. It consists of two distinct resilient cast iron parts: a base 11 and a forming complement 12. The forming complement, or complement, is fixed to the base by screws 13. The base comprises heating means made of electrical resistances 14 which pass through it and which make it possible to confer on the base a temperature of approximately 300-400 ° C. This temperature is adjustable by means of thermocouples 14 'located in the base. The complement adapts to the base and is joined to it, so that the base can heat the complement by thermal conduction and thus the temperature of the complement is similar to that of the base. It is necessary that the press is at a sufficient temperature to avoid that cold spots appear in the glass, which could constitute fragile points. As seen in FIG. 2, the forming complement 12 can be detached from the base 11 to be inverted with another complement when the curvature model is changed during manufacture on the production line. The additional forming 12 comprises a fixing surface 15 adapted to be fixed to the fixing surface of the base 16, and a forming surface 17 adapted to be pressed against the glass sheet to give it a desired shape. We can see the locations 18 provided for the fixing screws in the complement.
Exemple 2 Un vitrage bombé est fabriqué sur une ligne de production telle que décrite dans l'exemple 1, sauf que la station de pressage se situe dans le four tunnel, c'est-à-dire dans un environnement à une température d'environ 700°C. Dans ce cas, la presse mâle ne possède pas de moyens chauffants internes. C'est cette presse mâle qui est représentée à la figure 3.Example 2 Curved glazing is manufactured on a production line as described in Example 1, except that the pressing station is located in the tunnel oven, that is to say in an environment at a temperature of approximately 700 ° C. In this case, the male press does not have internal heating means. It is this male press which is represented in FIG. 3.
Exemple 3 Un vitrage bombé est fabriqué sur une ligne de production telle que décrite dans l'exemple 1, sauf que le mouvement du verre lors de l'étape de pressage est assuré d'une manière légèrement différente. Dans cet exemple, représenté à la figure 4, la presse mâle 10 comprend des moyens permettant d'engendrer une pression réduite sur la surface de formage 17 du complément. Ces moyens sont composés d'une chambre 19 reliée à un système (non représenté) pour créer le vide ou du moins une pression inférieure à la pression atmosphérique, et de conduits 20 qui traversent la presse mâle jusqu'à la surface de formage 17. Ce système permet d'attirer et/ou maintenir la feuille de verre contre la surface de formage, par aspiration. Lorsque la feuille de verre arrive dans la station de pressage, le système de pression réduite est activé et la feuille de verre est aspirée par la presse mâle en même temps que le cadre presse femelle soulève la feuille de verre. Après pressage, le cadre redescend alors que la feuille de verre est toujours maintenue contre la presse supérieure par la force d'aspiration de celle-ci. Un cadre navette se positionne sous la feuille de verre et l'aspiration est stoppée de façon à ce que la feuille de verre se place sur la navette. C'est le cadre navette qui conduit le verre bombé jusqu'à la station de refroidissement.Example 3 Curved glazing is manufactured on a production line as described in Example 1, except that the movement of the glass during the pressing step is provided in a slightly different manner. In this example, shown in Figure 4, the male press 10 includes means for generating reduced pressure on the forming surface 17 of the complement. These means are composed of a chamber 19 connected to a system (not shown) for creating the vacuum or at least a pressure below atmospheric pressure, and of conduits 20 which pass through the male press up to the forming surface 17. This system makes it possible to attract and / or hold the glass sheet against the forming surface, by suction. When the glass sheet arrives at the pressing station, the reduced pressure system is activated and the glass sheet is sucked up by the male press at the same time as the female press frame lifts the glass sheet. After pressing, the frame descends while the glass sheet is still held against the upper press by the suction force of the latter. A shuttle frame is positioned under the glass sheet and the suction is stopped so that the glass sheet is placed on the shuttle. It is the shuttle frame which leads the curved glass to the cooling station.
Exemple 4 Des vitrages bombés sont fabriqués sur une ligne de production telle que décrite dans l'exemple 3, sauf que deux vitrages sont fabriqués simultanément, grâce à deux compléments de formage fixés à la base. La figure 5 représente une vue du dessous de la presse mâle. Deux compléments de formage 12 et 12' sont fixés à la base 11 par des vis 13. La base a une dimension de 125 x 86 cm. Dans les zones 21 et 21' de la surface de fixation de la base où il n'y a pas de complément de formage, on peut voir les orifices où débouchent les conduits 20 du système d'aspiration. En fonctionnement, ces orifices sont bouchés par le placement sur la surface de fixation de la base, d'une plaque 22 en inox résistant aux hautes températures, fixée aux moyens de vis 23. Dans cet exemple, deux feuilles de verre sont convoyées parallèlement sur le lit de rouleaux et sont soulevées et pressées contre la presse mâle par deux cadres femelles. Example 4 Curved glazings are produced on a production line as described in Example 3, except that two glazings are produced simultaneously, thanks to two forming accessories attached to the base. Figure 5 shows a bottom view of the male press. Two forming accessories 12 and 12 'are fixed to the base 11 by screws 13. The base has a dimension of 125 x 86 cm. In the zones 21 and 21 ′ of the base fixing surface where there is no additional forming, one can see the orifices where the conduits 20 of the suction system open. In operation, these orifices are blocked by the placement on the fixing surface of the base, of a stainless steel plate 22 resistant to high temperatures, fixed by means of screws 23. In this example, two sheets of glass are conveyed in parallel on the roller bed and are lifted and pressed against the male press by two female frames.

Claims

REVENDICATIONS
1. Dispositif de bombage d'une feuille de verre comprenant une station de pressage qui comprend une presse mâle et une presse femelle opposées et complémentaires, caractérisé en ce que la presse mâle est formée d'au moins deux pièces distinctes résilientes, une base et au moins un complément de formage, adaptés à être fixés l'un à l'autre, et caractérisé en ce que le complément, qui est amovible et interchangeable selon la forme à donner à la feuille de verre, comprend une surface de fixation adaptée à être fixée à une surface de fixation de la base et une surface de formage adaptée à être pressé contre la feuille de verre et lui donner une forme désirée. 1. Device for bending a glass sheet comprising a pressing station which comprises an opposite and complementary male press and a female press, characterized in that the male press is formed of at least two distinct resilient parts, a base and at least one forming complement, adapted to be fixed to each other, and characterized in that the complement, which is removable and interchangeable according to the shape to be given to the glass sheet, comprises a fixing surface suitable for be fixed to a base fixing surface and a forming surface adapted to be pressed against the glass sheet and give it a desired shape.
2. Dispositif de bombage selon la revendication 1, caractérisé en ce que la presse mâle comprend des moyens permettant d'engendrer une pression réduite sur la surface de formage du complément, de façon à attirer et/ou maintenir la feuille de verre contre la surface de formage, moyens qui sont compris à la fois dans la base et le complément. 2. bending device according to claim 1, characterized in that the male press comprises means making it possible to generate a reduced pressure on the forming surface of the complement, so as to attract and / or hold the glass sheet against the surface for forming, means which are included in both the base and the complement.
3. Dispositif de bombage selon la revendication 2, caractérisé en ce que la base comprend une chambre et des conduits en communication avec cette chambre, le tout raccordé à des moyens d'aspiration.3. bending device according to claim 2, characterized in that the base comprises a chamber and conduits in communication with this chamber, all connected to suction means.
4. Dispositif de bombage selon la revendication 3, caractérisé en ce que le complément comprend des conduits en communication avec ceux de la base au niveau de la surface de fixation et débouchant sur la surface de formage.4. bending device according to claim 3, characterized in that the complement comprises conduits in communication with those of the base at the level of the fixing surface and opening onto the forming surface.
5. Dispositif de bombage selon une des revendications précédentes, caractérisé en ce que la base comprend des moyens chauffants.5. Bending device according to one of the preceding claims, characterized in that the base comprises heating means.
6. Dispositif de bombage selon une des revendications précédentes, caractérisé en ce que la presse femelle est un cadre adapté à être pressé contre une partie périphérique de la feuille de verre et lui donner une forme désirée. 6. bending device according to one of the preceding claims, characterized in that the female press is a frame adapted to be pressed against a peripheral part of the glass sheet and give it a desired shape.
7. Dispositif de bombage selon une des revendications précédentes, caractérisé en ce que la presse mâle comprend plusieurs compléments identiques ou différents.7. bending device according to one of the preceding claims, characterized in that the male press comprises several identical or different supplements.
8. Dispositif de bombage selon la revendication 7, caractérisé en ce que la presse femelle comprend plusieurs cadres, chacun complémentaire à un des compléments de la presse mâle.8. Bending device according to claim 7, characterized in that the female press comprises several frames, each complementary to one of the complements of the male press.
9. Installation de bombage de feuilles de verre comprenant un four tunnel, une station de pressage, diverses paires de presses mâle et femelle complémentaires, et une station de refroidissement ou de trempe, caractérisé en ce qu'au moins une des presses mâles pouvant être utilisée dans la station de pressage est formée d'au moins deux pièces distinctes résilientes, une base et au moins un complément de formage, adaptés à être fixés l'un à l'autre, et caractérisé en ce que le complément, qui est amovible et interchangeable selon la forme à donner aux feuilles de verre, comprend une surface de fixation adaptée à être fixée à une surface de fixation de la base et une surface de formage adaptée à être pressé contre les feuilles de verre et leur donner une forme désirée.9. Installation for bending glass sheets comprising a tunnel oven, a pressing station, various pairs of complementary male and female presses, and a cooling or quenching station, characterized in that at least one of the male presses can be used in the pressing station is formed of at least two distinct resilient parts, a base and at least one forming complement, adapted to be fixed to each other, and characterized in that the complement, which is removable and interchangeable according to the shape to be given to the glass sheets, comprises a fixing surface adapted to be fixed to a fixing surface of the base and a forming surface adapted to be pressed against the glass sheets and give them a desired shape.
10. Procédé de bombage d'une feuille de verre comprenant une étape de pressage entre deux presses opposées et complémentaires selon l'une des revendications précédentes. 10. A method of bending a glass sheet comprising a pressing step between two opposite and complementary presses according to one of the preceding claims.
11. Procédé de bombage selon la revendication 10, caractérisé en ce que l'étape de pressage se fait en dehors du four.11. Bending method according to claim 10, characterized in that the pressing step is carried out outside the oven.
12. Procédé de bombage selon la revendication 10 ou 11, caractérisé en ce que le complément est chauffé par conduction au contact de la base qui comprend des moyens chauffants. 12. Bending method according to claim 10 or 11, characterized in that the complement is heated by conduction in contact with the base which comprises heating means.
13. Vitre latérale, toit en verre ou lunette-arrière d'automobile, caractérisé en ce qu'il est fabriqué au moyen d'un dispositif selon une des revendications 1 à 8. 13. Side window, glass roof or rear window of an automobile, characterized in that it is manufactured by means of a device according to one of claims 1 to 8.
EP05747770A 2004-04-26 2005-04-19 Device and method for cambering a glass sheet Withdrawn EP1742885A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05747770A EP1742885A1 (en) 2004-04-26 2005-04-19 Device and method for cambering a glass sheet

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04101735A EP1591425A1 (en) 2004-04-26 2004-04-26 Apparatus and method for press bending a glass sheet
EP05747770A EP1742885A1 (en) 2004-04-26 2005-04-19 Device and method for cambering a glass sheet
PCT/EP2005/051711 WO2005102945A1 (en) 2004-04-26 2005-04-19 Device and method for cambering a glass sheet

Publications (1)

Publication Number Publication Date
EP1742885A1 true EP1742885A1 (en) 2007-01-17

Family

ID=34929011

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04101735A Withdrawn EP1591425A1 (en) 2004-04-26 2004-04-26 Apparatus and method for press bending a glass sheet
EP05747770A Withdrawn EP1742885A1 (en) 2004-04-26 2005-04-19 Device and method for cambering a glass sheet

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04101735A Withdrawn EP1591425A1 (en) 2004-04-26 2004-04-26 Apparatus and method for press bending a glass sheet

Country Status (4)

Country Link
US (1) US8413467B2 (en)
EP (2) EP1591425A1 (en)
JP (1) JP5148269B2 (en)
WO (1) WO2005102945A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2960232B1 (en) * 2010-05-19 2015-01-02 Saint Gobain ALVEOLAR BOMBING SHAPE
US9346701B2 (en) 2011-05-27 2016-05-24 Pittsburgh Glass Works, Llc Multi-stage glass pressing systems and methods
US8776550B2 (en) 2011-11-23 2014-07-15 Corning Incorporated Method and system for making glass articles
KR101449364B1 (en) * 2014-02-13 2014-10-10 (주)육일씨엔에쓰 Manufacture device and method of the curvature shape glass plate
CN105985008A (en) * 2015-02-25 2016-10-05 科立视材料科技有限公司 Vacuum-assisted glass forming method and using method thereof
CN106810057B (en) * 2015-11-30 2019-08-30 六日希恩施有限公司 The manufacturing device of electronic product display front surface glass
CN110668683A (en) * 2018-07-03 2020-01-10 定西中庆玄和玻璃科技有限公司 Elastic fixing device for glass bending and tempering
FI20185664A1 (en) * 2018-07-31 2020-02-01 Taifin Glass Machinery Oy Method in a device for bending glass sheets, and device for bending glass sheets

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287761B (en) * 1963-10-16 1969-01-23
US4526605A (en) * 1983-09-15 1985-07-02 Ppg Industries, Inc. Vacuum mold for shaping glass sheets
JPS62182124A (en) * 1986-02-03 1987-08-10 Nippon Sheet Glass Co Ltd Forming apparatus having mold changing device for flat glass
DE3715151A1 (en) * 1987-05-07 1988-11-17 Ver Glaswerke Gmbh METHOD AND DEVICES FOR BENDING GLASS PANES
US5279635A (en) * 1992-01-08 1994-01-18 Libbey-Owens-Ford Co. Method and apparatus for controlling the temperature of glass sheets in press bending
US5286271A (en) * 1992-07-02 1994-02-15 Ppg Industries, Inc. Method and apparatus for bending glass sheets
GB9304286D0 (en) * 1993-03-03 1993-04-21 Pilkington Glass Ltd Bending apparatus
FR2707283B1 (en) * 1993-07-09 1995-09-22 Saint Gobain Vitrage Int Method and device for forming glass plates and application of this method to obtaining glazings of complex shapes.
DE4412746A1 (en) * 1994-04-15 1995-10-19 Flachglas Ag Process for operating a press bending station for bending glass panes
KR100292561B1 (en) * 1998-10-30 2001-06-01 배강호 Device for producing curved glass article
US20020116951A1 (en) * 2001-02-27 2002-08-29 Dunifon Thomas A. Conformally heated male mold

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005102945A1 *

Also Published As

Publication number Publication date
EP1591425A1 (en) 2005-11-02
JP2007534596A (en) 2007-11-29
JP5148269B2 (en) 2013-02-20
WO2005102945A1 (en) 2005-11-03
US20070283720A1 (en) 2007-12-13
US8413467B2 (en) 2013-04-09

Similar Documents

Publication Publication Date Title
EP1742885A1 (en) Device and method for cambering a glass sheet
CA2031748C (en) Glazing manufacturing line with multiple workstations
EP1836137B1 (en) Glass-bending and cooling method and device comprising two support trains
EP2766184B1 (en) Production of a laminated glass panel
EP0290346B1 (en) Method and apparatus for bending glass plates
EP0839769B1 (en) Method and apparatus for progressif bending of glass sheets
EP0241355B1 (en) Apparatus for bending glass sheets
EP3277640B1 (en) Apparatus for bending sheets of glass
EP0556103B1 (en) Apparatus for bending windscreens
EP1301444B1 (en) Method and device for bending a glass sheet
CA2019486C (en) Process and apparatus for effecting curving and tempering by contact
EP1611062B1 (en) Method and device for crowning glass sheets
EP0810978A1 (en) Method for bending and/or tempering sheet glass and bending frame therefor
CA2988786A1 (en) Device for conveying glass sheets
FR2465692A1 (en) METHOD AND DEVICE FOR SHAPING GLASS SHEETS USING MOLDS OF DIFFERENT SHAPES
EP0459898B1 (en) Method and apparatus for bending sheets of glass
EP0389315B1 (en) Positioning of a glass sheet opposite to devices for bending and/or another thermal treatment
FR2546503A1 (en) MULTI-CHAMBER VACUUM SUPPORT, USED FOR FORMING GLASS SHEETS, WITH MEANS FOR ISOLATING NEIGHBORING VACUUM CHAMBERS
EP3281921A1 (en) Method and device for exchanging the extraction rollers in an exit lock of a tin bath with continuous support of the floating glass ribbon
FR2516502A1 (en) METHOD AND APPARATUS FOR EXTRACTING HANGED AND TEMPERED GLASS SHEETS FROM A COOLING STATION
EP0299869B1 (en) Bending of glass sheets
EP0451010A1 (en) Apparatus for heating, forming and tempering glass sheets
EP0530086B1 (en) Apparatus for bending glass sheets
WO2016034690A1 (en) Mould for a blow-moulding machine and blow-moulding machine equipped with such a mould
FR2607436A1 (en) METHOD AND DEVICE FOR AUTOMATICALLY ASSEMBLING LAMINATED GLAZINGS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20061127

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20070510

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AGC FLAT GLASS EUROPE SA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20180306