EP3873858A1 - Procédé et dispositif pour le cintrage des vitres - Google Patents

Procédé et dispositif pour le cintrage des vitres

Info

Publication number
EP3873858A1
EP3873858A1 EP19794151.1A EP19794151A EP3873858A1 EP 3873858 A1 EP3873858 A1 EP 3873858A1 EP 19794151 A EP19794151 A EP 19794151A EP 3873858 A1 EP3873858 A1 EP 3873858A1
Authority
EP
European Patent Office
Prior art keywords
tool
bending
disc
bending chamber
press frame
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Withdrawn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
EP19794151.1A
Other languages
German (de)
English (en)
Inventor
Arthur PALMANTIER
Achim ZEICHNER
Jack PENNERS
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.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain 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 Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP3873858A1 publication Critical patent/EP3873858A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • C03B23/0235—Re-forming glass sheets by 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
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0256—Gravity bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces
    • 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
    • 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
    • C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the invention is in the technical field of the manufacture of panes and relates to a method and an apparatus for bending panes.
  • WO 2012/080072 describes a method with a gradual bending of glass panes in the edge and inside area.
  • the glass pane is first moved into a furnace on a pre-bending ring, the pane edge being pre-bent, followed by further bending of the pane edge by a first suction device, placing and bending the glass pane in the area on an end bending ring and final bending to the desired one Final geometry using a second suction device.
  • WO 2004/087590 and WO 2006072721 each describe a method in which the glass pane is first bent by gravity on a bending frame, followed by press bending using an upper or lower tool.
  • EP 255422 and US 5906668 each describe the bending of a glass pane by suction against an upper tool.
  • a device can be found in EP 1550639 A1, US 2009/084138 A1 and EP 2233444 A1, in which a press frame can be transported between bending stations on a slide which is displaceably mounted on a stationary support.
  • WO 2007/050297 A2 discloses a device for glass bending, in which the pane is heated to the bending temperature in a heating zone. The heated disc is then lifted by means of a transport plate and transported from the heating zone into a bending chamber, where it is placed on a press ring. The disc is then press-molded using a bending tool.
  • An analog device can be found in US 4662925 A.
  • pane generally refers to a glass pane, in particular a thermally toughened soda-lime glass.
  • pre-bend refers to an incomplete bend of the pane with respect to a defined or definable final bend (end geometry or shape) of the pane.
  • the pre-bend can account for 10% to 80% of the final bend.
  • edge pre-bend refers to the incomplete bend of the pane in a terminal edge region of the pane adjacent to a pane edge, typically a strip-like peripheral area adjacent to the pane edges.
  • the strip width is in the range from 3 mm to 150 mm.
  • the pane edges are each formed by an end face, which is typically perpendicular to the two opposing main pane faces.
  • the term refers to the incomplete bend of the pane in a central or inner region of the pane, which is surrounded by the edge region and directly adjoins the edge region.
  • the term “final bend” refers to the complete bend of the disc.
  • the term refers to the complete bend in the edge region of the pane, when used as a "bend-in end” to the complete bend in the interior of the pane.
  • the device for bending panes comprises a bending chamber for bending heated panes, which is advantageously equipped with a heating device for heating panes.
  • the bending chamber can be brought to a temperature (softening temperature) for this purpose, which is a plastic deformation of Panes enabled and typically for glass in the range of 600 ° C to 800 ° C.
  • the bending chamber has a bending chamber cavity which is completely delimited by a preferably insulated wall.
  • the bending chamber cavity has at least one opening opening into the bending chamber cavity, which opening can preferably be closed by a bending chamber door.
  • At least one stationary (stationary) tool with a contact surface for fixing a disk is arranged in the bending chamber.
  • the term "stationary tool” refers to a tool that is neither inserted into the bending chamber nor removed from the bending chamber at least during the period in which a same disk is in the bending chamber, but remains permanently (uninterrupted) in the bending chamber.
  • the stationary tool remains permanently in the bending chamber, at least in the period from providing a disc to be machined in the bending chamber to transporting the disc on a frame-shaped carrier (pretensioning frame) from the bending chamber to a cooling device (located outside the bending chamber) .
  • the stationary tool can be moved within the bending chamber.
  • the bending chamber preferably, but not necessarily, comprises only a single stationary tool.
  • the device for bending panes comprises at least one transportable tool with a contact surface for fixing a pane.
  • transportable tool refers to a tool that is not permanently arranged in the bending chamber during the period in which the same disc is in the bending chamber, but is also temporarily outside the bending chamber and is inserted into the bending chamber without a disk attached to the portable tool and removed from the bending chamber without a disk attached to the portable tool. The transportable tool is therefore always introduced into the bending chamber and the transportable tool is removed from the bending chamber without a disk fixed to the transportable tool.
  • a disk is fixed to the transportable tool exclusively within the bending chamber, but not outside the bending chamber, in particular not in a preheating zone that serves to heat the disks to a temperature suitable for bending (softening temperature of glass).
  • the transportable tool is not used to transport a disk into the bending chamber or out of the bending chamber out.
  • the transportable tool is between the fixing of a disc on the stationary tool in the bending chamber and the immediately following fixing of another disc on the stationary tool in the bending chamber, that is between the immediately successive fixing of two discs on the stationary one Tool in the bending chamber, without a disk attached to the portable tool, inserted into the bending chamber and removed from the bending chamber.
  • the portable tool is preferably immovably attached to a movable tool carrier.
  • the tool carrier is arranged in relation to the bending chamber in such a way that the transportable tool can be inserted into the bending chamber by moving the tool carrier and removed from the bending chamber.
  • the transportable tool preferably moves into the bending chamber (without a disk attached to it) and out of the bending chamber (without a disk attached to it) exclusively in the horizontal direction.
  • the transportable tool is preferably moved within the bending chamber with the disk fixed to the transportable tool exclusively in the vertical direction.
  • the stationary tool and the transportable tool each serve for shaping panes, each tool having a contact surface which is generally used to fix a pane and, if appropriate, to press (mold) the pane in cooperation with a frame-shaped (pane) carrier, for example, annular carrier, hereinafter referred to as "frame", is used.
  • a frame-shaped (pane) carrier for example, annular carrier, hereinafter referred to as "frame”
  • the transportable tool in cooperation with the press frame, can also be used for compression molding a pane.
  • the term “fixing” denotes the fixing of a disc to the contact surface of a tool, the disc being able to be pressed against the contact surface and / or pulled, in particular sucked in, by the contact surface.
  • the contact surface of a tool is typically designed in such a way that a disk can achieve a desired bending in a bending process comprising several stages (bending processes).
  • the contact surface has an outer surface section and an inner surface section or is composed of the outer and inner surface section.
  • the outer surface section of the contact surface is preferably designed to be suitable for an edge end bend in an edge region of the disk.
  • the inner surface section is preferably designed to be suitable for surface pre-bending or surface end bending in a central or inner region of the pane surrounded by the edge region.
  • the phrase “suitably designed” is to be understood in connection with the outer surface section of the contact surface in such a way that the outer surface section is shaped in such a way that an edge end bend of the pane can be produced by abutment against the outer surface section or pressing of a pane is.
  • the pane does not necessarily have to be subjected to an edge end bend, but only an edge pre-bend can take place. In this case, the edge end bend is only generated in the further course of the process.
  • the outer surface section does not necessarily have to have a shape that is complementary to the shape of an edge-bent disk.
  • “suitably designed” means that the inner surface section is shaped, for example, in such a way that a surface pre-bending of the disk can be generated by abutment against the inner surface section or pressing, pre-bending must take place. If the inner surface section is suitable for a surface end bend, this means that a surface end bend can be generated, but does not necessarily have to be generated. The surface end bend can also only be created in the further procedure. The fixing of a pane on the contact surface can, but does not necessarily have to be connected with a bending process of the pane. The contact surface of a tool is oriented downwards in the working position.
  • the pre-bend is not limited in one direction (cylindrical pre-bend). Rather, a pre-bend can also be carried out in several different directions.
  • the at least one tool carrier is preferably attached to a module which is arranged outside the bending chamber and which is referred to below as “tool carrier module” for easier reference and differentiation from the "press frame module” mentioned below.
  • the tool carrier module forms a structural unit and is preferably, but not necessarily, movable relative to the bending chamber, so that it can be advanced to the bending chamber and spatially removed from the bending chamber.
  • the tool carrier module has an actively or passively drivable movement mechanism for moving the tool carrier module relative to the bending chamber, for example a roller transport mechanism or air cushion transport mechanism.
  • the tool carrier module preferably comprises a heatable cavity, hereinafter referred to as "tool carrier module cavity", which is at least partially, in particular completely, delimited by a preferably insulated wall.
  • the tool holder module cavity has at least one opening, which can preferably be closed by a door or flap. If the tool carrier module is delivered to the bending chamber, the tool carrier module cavity can be spatially connected to the bending chamber cavity, the tool Tool carrier module cavity has at least one first opening, which can be brought into an opposing position with a second opening of the bending chamber cavity of the bending chamber, so that a preferably flush connection of the tool carrier module cavity and the bending chamber cavity can be produced.
  • the first opening of the tool holder module cavity and / or the second opening of the bending chamber cavity are preferably each provided with a door through which the associated opening can be closed.
  • the spatial connectivity of the tool carrier module cavity and the bending chamber cavity is essential.
  • the tool holder module cavity serves to receive the transportable tool attached to the tool holder, in particular to heat the transportable tool to a temperature suitable for disk processing before it is introduced into the bending chamber. In this way, the processing of disks in the bending chamber can be carried out very quickly without time-consuming heating of the transportable tool inside the bending chamber being necessary.
  • the tool carrier module is delivered to the bending chamber in such a way that the transportable tool can be moved into and out of the bending chamber by moving the tool carrier, this movement preferably comprising at least one horizontal movement component.
  • the tool carrier is (only) moved reciprocally and translationally (ie 1-dimensionally) in a horizontal plane in order to move the transportable tool into and out of the bending chamber.
  • the tool carrier can preferably also be moved in the vertical direction, in particular in order to move the transportable tool in the vertical direction within the bending chamber.
  • the tool carrier is coupled with a movement mechanism. If a heatable tool holder module cavity is provided, it is particularly advantageous if the tool holder movement mechanism is arranged at least partially, in particular completely, outside the heated tool holder module cavity.
  • the tool carrier can preferably be actively cooled by a cooling device, as a result of which the positioning accuracy of the transportable tool can be further improved.
  • the tool carrier module is a self-sufficient unit that enables easy loading with a tool and quick tool replacement independent of the bending chamber, in particular because of the possibility of moving the tool carrier outwards. If the tool carrier module is movable, the tool carrier module can be easily moved to the bending chamber and removed again. This advantageously also provides free access to the bending chamber in order to carry out maintenance work or adjustments for a specific bending process.
  • the device for bending panes comprises a press frame (e.g. press ring) with a press surface for pressing a pane.
  • the pressing surface of the pressing frame is preferably designed to be complementary to the outer surface section of the stationary and / or transportable tool which is suitably designed for an edge end bend.
  • the pressing surface is designed, for example, in the form of a strip, for example with a strip width in the range from 3 to 150 mm.
  • the press surface of the press frame is oriented upwards for contact with a pane.
  • a larger width of the strip-shaped pressing surface is advantageous due to a better weight distribution in terms of avoiding undesired markings (changes in the flat surfaces of the pane), whereby the pressing of the pane in the edge area on the press frame leads to the generation of markings can be counteracted.
  • the press surface of the press frame has a defined geometry, the press frame being sufficiently rigid for this purpose.
  • the press frame is designed, for example, as a cast part, the press surface being produced, for example, by milling.
  • the press frame is preferably designed to be suitable for pre-bending by gravity in the inner region of the pane, it being possible for the inner region of the pane to sag downward due to gravity. In gravity bending, the disc is pre-bent by its own weight.
  • the press frame can be open, that is to say provided with a central opening, or can have a concave full surface as long as the inner region of the pane can sag. An open design is preferred in view of easier processing of panes.
  • the tools (stationary tool and the at least one transportable tool) and the press frame can each be moved in the vertical direction relative to one another, so that a disk between the contact surface of a respective tool and the press surface of the Press frame is compressible.
  • the pane is pre- or end-bent in the edge area.
  • the stationary tool is advantageously coupled to a movement mechanism by means of which the tool can be advanced to the stationary press frame in order to press a pane.
  • the transportable tool can preferably be moved down to the stationary press frame by moving the tool carrier in a vertical direction in order to press a disk.
  • the transportable tool with the disk attached to it moves exclusively in the vertical direction.
  • the tools are each assigned a means for fixing a disc on the respective contact surface.
  • the means for fixing a disc to the contact surface preferably comprises a pneumatic suction device for sucking in a gaseous fluid, in particular air, through which the disc can be pulled against the contact surface by means of a vacuum.
  • the contact surface can be provided, for example, with at least one suction hole, advantageously with a multiplicity of suction holes, for example uniformly distributed over the contact surface, against which a vacuum can be applied to the contact surface for a suction effect.
  • the suction device can have an apron which surrounds the contact surface and by means of which a suppression on the contact surface can be generated. The suction device generates a typically upward flow of a gaseous fluid, in particular air, which is sufficient to hold the disk against the contact surface.
  • the tools are preferably each assigned a means for removing a disk fixed to the respective contact surface.
  • This is advantageously a Pneumatic blowing device for ejecting a gaseous fluid, in particular air, through which the disk can be removed from the contact surface by means of excess pressure.
  • the contact surface can be provided, for example, with at least one blow hole, advantageously with a plurality of blow holes, for example evenly distributed over the contact surface.
  • the blowing device typically generates a downward flow of a gaseous fluid, in particular air, through which the disk can be removed from the contact surface. This enables the pane to be reliably placed on a frame without the risk of the pane sticking to the contact surface in an undesirable manner.
  • the suction and blowing device assigned to the tools can be combined to form a suction / blowing device, wherein holes on the contact surface can optionally be acted upon by negative or positive pressure. If a heatable tool holder module cavity is provided for receiving the transportable tool, it can be advantageous if the means for generating a negative or positive pressure of the suction and / or blowing device, which is assigned to the transportable tool, outside of the heatable tool holder module cavity is arranged.
  • the device for bending disks preferably further comprises a pneumatic blowing device for generating a gaseous fluid stream, in particular an air stream, which is designed such that a disk is blown from below by the gaseous fluid stream, raised thereby and pressed against the contact surface of a tool can be.
  • the blowing device can in particular be designed such that the disk attached to the contact surface can be pre-bent by the pressure exerted by the gaseous fluid flow in the edge area and / or in the interior area, advantageously at least in the edge area.
  • the device according to the invention for bending panes has a thermal prestressing zone with a cooling device for thermally prestressing a pane, as well as a prestressing frame (for example a prestressing ring) for transporting a pane from the bending chamber to the prestressing zone.
  • the pretensioning frame can preferably be moved with at least one horizontal movement component.
  • the pretensioning frame can advantageously be moved reciprocally and translationally (1-dimensionally) in a horizontal plane.
  • the thermal prestressing (tempering) specifically creates a temperature difference between a surface zone and the core zone of the pane in order to increase the breaking strength of the pane.
  • the prestressing of the disc is advantageous by means of a device for blowing the pane with a gaseous fluid, preferably air.
  • a cooling air stream is preferably applied to the two surfaces of a pane at the same time.
  • the leader frame is coupled to a leader frame moving mechanism by which the leader frame can be reciprocally moved.
  • the biasing frame moving mechanism is preferably not coupled to a moving frame moving mechanism.
  • a single pane can be transported on the press frame and the preload frame. It goes without saying that a pane can lie on the press frame and another pane on the prestressing frame at the same time.
  • the pretensioning frame for transporting a pane from the bending chamber to the pretensioning zone has a frame surface which is suitably designed for the edge end bending in the edge region of the pane.
  • the prestressing frame is designed to be suitable for a surface bending by gravity in the inner region of the pane. During the transport of a pane on the prestressing frame, an edge end bend and surface end bend can take place by gravity.
  • the device for bending panes has a preheating zone with a heating device for heating panes to a bending temperature (softening temperature of glass), and a transport mechanism, in particular of the roller bed type, for transporting panes from the preheating zone to the bending chamber, in particular to a removal position, which is preferably located in the vertical direction directly below the stationary tool.
  • a heating device for heating panes to a bending temperature (softening temperature of glass)
  • a transport mechanism in particular of the roller bed type, for transporting panes from the preheating zone to the bending chamber, in particular to a removal position, which is preferably located in the vertical direction directly below the stationary tool.
  • disks on the roller bed can be transported into the bending chamber, preferably up to a removal position directly below the stationary tool.
  • the roller bed is advantageously designed such that individual disks can be transported one after the other to the removal position.
  • the removal position can correspond in particular to an end section of the roller bed.
  • the panes are typically heated from a temperature below a softening temperature of the glass to the softening temperature or bending temperature in the preheating zone, the panes typically only maintaining the temperature of the panes, ie there is typically no further temperature increase of the panes in the bending chamber.
  • the disks arrive in the bending chamber at a temperature suitable for the bending.
  • the device for bending panes according to the invention has a further module, which is referred to as a “press frame module” for easier reference and differentiation from the above-mentioned tool carrier module.
  • the press frame module forms a structural unit and is preferably, but not necessarily, movable relative to the bending chamber, so that the press frame module can be fed to the bending chamber or removed from the bending chamber.
  • the press frame module preferably has an actively or passively drivable movement mechanism for moving the press frame module relative to the bending chamber, for example a roller transport mechanism or air cushion transport mechanism.
  • the press frame module preferably has a cavity, hereinafter referred to as "press frame module cavity", which is completely delimited by a preferably insulated wall. The press frame module cavity is separated from the external environment by the wall.
  • the press frame module has a movable press frame carrier with a press frame, which is preferably immovably attached, for overlying storage and pressing of a pane.
  • the press frame is preferably arranged in the press frame module cavity or can be (completely) arranged in the press frame module cavity.
  • the press frame carrier can be moved relative to the bending chamber.
  • the press frame module is delivered to the bending chamber in such a way that the press frame support with press frame can be inserted into the bending chamber (from a position outside the bending chamber).
  • the press frame module cavity has at least one first opening, which can be brought into an opposing position with a second opening of the bending chamber cavity of the bending chamber, so that a preferably flush connection of the press frame module cavity and the bending chamber cavity can be produced.
  • the first opening of the press frame module cavity and / or the second opening of the bending chamber cavity are preferably each provided with a door through which the associated opening can be closed.
  • the spatial connectivity of the press frame module cavity and the bending chamber cavity is essential, in particular by opening at least one door between the press frame module cavity and the bending chamber cavity.
  • the press frame can advantageously be moved reciprocally and translationally (ie 1-dimensionally) in a horizontal plane.
  • the press frame carrier is coupled to a movement mechanism for its movement.
  • a very precise positioning of the press frame is required, typically an accuracy of less than 1 mm, typically at least approx. 0.5 mm, required.
  • a movement mechanism for the press frame support is advantageously arranged outside the bending chamber in an unheated area of the press frame module. In addition, this enables the press frame carrier to be positioned particularly quickly, which is a further important advantage since the cycle times can be reduced as a result.
  • the press frame module is a self-sufficient unit that enables the press frame module to be equipped with the press frame independently of the bending chamber.
  • the movability of the press frame carrier to the outside enables simple and quick loading of the press frame module. If the press frame module is movable, the press frame module can be advanced to the bending chamber and removed again. In particular, this creates free access to the bending chamber in order to carry out maintenance work or adjustments for a specific bending process.
  • the device is designed such that the panes are fed from a first direction to the bending chamber and the at least one transportable tool is introduced into the bending chamber from a second direction different from the first direction.
  • a first direction in which the disks are fed to the bending chamber is arranged at an angle of 90 ° in a second direction in which the at least one transportable tool is introduced into the bending chamber (without a disk attached to it).
  • the direction in which disks are transported into the bending chamber and the direction in which the transportable tool is introduced into the bending chamber are not the same.
  • the method according to the invention for bending panes is described, for which independent protection is claimed.
  • the above-described device for bending panes preferably serves to carry out the method according to the invention, so that the above statements relating to the device according to the invention apply analogously to the method according to the invention.
  • Features that are specified for the device according to the invention therefore apply in the same way to the method according to the invention.
  • a disk is fixed in a bending chamber on the contact surface of a transportable tool and by it Tool placed on a frame. It is essential here that the transportable tool is inserted into the bending chamber on the transportable tool before the disc is fixed in the bending chamber, the disc not being fixed to the transportable tool when the transportable tool is inserted into the bending chamber, and after that Placing the pane on the frame is again removed from the bending chamber without a fixed pane.
  • the transportable tool is therefore not used to transport a disk into the bending chamber or out of the bending chamber.
  • a disc is only attached to the transportable tool within the bending chamber.
  • the transportable tool is preferably moved into the bending chamber and out of the bending chamber exclusively in the horizontal direction.
  • the transportable tool is preferably moved within the bending chamber with a disk fixed to the transportable tool exclusively in the vertical direction.
  • the transportable tool is inserted into the bending chamber and out of the bending chamber without a disc attached to it away.
  • the disks are fed from a first direction to the bending chamber and the at least one transportable tool is introduced into the bending chamber from a second direction different from the first direction.
  • the disks are preferably provided by a roller bed in the bending chamber.
  • the method for bending panes comprises the steps listed below, which are advantageously, but not necessarily, carried out in the order given. In particular, a step can also only be carried out after a step mentioned later in the following list, provided that this is possible and sensible in terms of the method.
  • the method comprises a step in which a pane, preferably heated to the bending temperature, is provided in the bending chamber.
  • the disc is advantageous for this Purpose with at least one horizontal movement component, in particular in a horizontal plane.
  • the disk is preferably transported into the bending chamber on a roller bed.
  • the method comprises a further step in which the disk is fixed on a contact surface of a first tool.
  • the disc is advantageously fixed to the contact surface by lifting the disc by blowing with a gaseous fluid and pressing it against the contact surface.
  • the disk is fixed on the contact surface by suction.
  • the disk is subjected to an edge bend in the edge area and / or a surface bend in the inner area of the disk on the contact surface of the first tool.
  • the first tool is preferably lowered onto the disk, for example by moving in the vertical direction, and raised again after the disk has been fixed on the contact surface, for example by moving in the vertical direction.
  • the method comprises a further step in which a press frame for the disc is positioned within the bending chamber, preferably while the disc is fixed on the contact surface of the first tool.
  • the press frame is preferably inserted into the bending chamber from outside the bending chamber.
  • the press frame is advantageously moved with a horizontal movement component, in particular in a horizontal plane.
  • the method comprises a further step in which the pane is placed on the press frame.
  • a (passive) surface pre-bending takes place in an inner area of the pane surrounded by the edge area due to the weight of the pane. Placing the pane on the press frame is advantageously supported by blowing with a gaseous fluid.
  • the method can include a further step in which the disk is pressed between the contact surface of the first tool and the press frame before being placed on the press frame (first pressing of the disk).
  • first pressing of the disk first pressing of the disk.
  • an edge pre-bend or edge end bend takes place in an edge region of the pane.
  • the first tool with the disk attached to the contact surface is preferably lowered onto the stationary press frame, for example in the vertical direction, so that the disk attached to the contact surface is in contact with the press frame.
  • the disc it is sufficient if the fixing connection between the contact surface of the first tool and the disc is released and the first tool is removed from the press frame.
  • the disc is already in contact with the press frame when it is pressed. By blowing with a gaseous fluid, undesired adhesion to the contact surface can be avoided.
  • the method comprises a further step in which the pane lying on the press frame is pressed between a second tool and the press frame (second pressing of the pane), with an edge pre-bending or edge-end bending taking place in the edge region of the pane.
  • the second tool is advantageously lowered onto the disc mounted on the stationary press frame, for example in the vertical direction, so that the contact surface of the second tool is in contact with the disc.
  • the method comprises a further step in which, after the second pressing, the disk is fixed between the contact surface of the second tool and the press frame on the contact surface of the second tool.
  • the disk is advantageously fixed on the contact surface of the second tool by suction.
  • the second tool with the disk fixed on the contact surface is preferably removed from the press frame.
  • the press frame is advantageously removed from the bending chamber as soon as the disk is attached to the contact surface of the second tool (i.e. no longer lies on the press frame) and the second tool is removed from the press frame.
  • the method comprises a further step in which a prestressing frame is positioned in the bending chamber.
  • the pretensioning frame is preferably moved translationally (1-dimensionally) in a horizontal plane.
  • the method comprises a further step in which the disk is placed on the prestressing frame by the second tool.
  • the second tool with the disk attached to the contact surface is advantageously lowered onto the pretensioning frame, for example in the vertical direction.
  • the method comprises a further step in which the pane is transported on the prestressing frame to a cooling device for thermally prestressing the pane.
  • the pretensioning frame is advantageously moved with a horizontal movement component, in particular in a horizontal plane.
  • the prestressing frame is preferably moved in a translatory (1-dimensional) manner.
  • first tool is a transportable tool and the second tool is a stationary tool or, alternatively, the second tool is a transportable tool and the first tool is a stationary tool in the sense of the invention.
  • the transportable tool is particularly advantageously fastened to a tool carrier that can be inserted into the bending chamber by a tool carrier module and is inserted into the bending chamber by moving the tool carrier and removed from the bending chamber.
  • the transportable tool is particularly advantageously heated before being introduced into the bending chamber (to a temperature suitable for bending panes, in particular to a temperature which prevails in the bending chamber).
  • the first tool is inserted into the bending chamber from outside the bending chamber before the disk is fixed to its contact surface (without the disk fixed to the first tool) and removed from the bending chamber after the disk has been placed on the press frame (without the first Tool set disc).
  • the second tool is permanently arranged in the bending chamber at least in a period from the provision of the disk in the bending chamber to the transportation of the disk on the prestressing frame.
  • the second tool is inserted into the bending chamber from outside the bending chamber after the disk has been placed on the press frame (without the disk attached to the second tool) and after the disk has been placed on the prestressing frame out of the bending chamber removed (without the disc attached to the second tool).
  • the first tool is permanently arranged in the bending chamber at least in a period from the provision of the disk in the bending chamber to the transportation of the disk on the prestressing frame.
  • the press frame is inserted into the bending chamber before the disk is placed on the press frame (from a position outside the bending chamber) and is removed from the bending chamber after the disk has been fixed on the contact surface of the second tool.
  • the press frame is fastened to a press frame carrier which can be inserted into the bending chamber by a press frame module and is inserted into the bending chamber by moving the press frame carrier and removed from the bending chamber.
  • the press frame and / or the press frame carrier is preferably supported downwards when a pane can rest on it.
  • the press frame with the disc lying thereon is not moved. This can result in particularly high quality requirements for the
  • the disc has no movement with a horizontal component of motion while it is attached to a tool, i.e. it is only moved in the vertical direction. This further improves the precise positioning of the disc.
  • the press frame and the transportable tool can be positioned very precisely in the bending chamber, in particular if the movement mechanism for moving the press frame carrier and / or the movement mechanism for moving the tool carrier is respectively arranged outside the heated area of the associated module.
  • a passive edge pre-bending by own weight or an active edge pre-punching by pressing in the edge region of the plate takes place.
  • the (optionally second) pressing of the pane between the second tool and the press frame results in a further edge bending in the edge region of the pane.
  • an edge end bend takes place in the edge region of the pane during the transport of the pane on the prestressing frame.
  • a passive edge pre-bending is carried out by placing the disc on the press frame and optionally by pressing the disc between the first tool and the press frame. important or an active edge preparation by pressing in the edge area of the pane. The (optionally second) pressing of the pane between the second tool and the press frame then results in an edge end bend in the edge region of the pane.
  • pressing the pane between the first tool and the press frame results in an (active) end-end bend in the edge region of the pane.
  • (passive) surface pre-bending takes place in an inner region of the pane surrounded by an edge region due to gravity or the weight of the pane while the pane is being stored on the press frame.
  • the bending of the disk by means of the second tool can give the disk a final or quasi-final shape.
  • the shape of the disc on the prestressing frame will still change (as a rule slightly), for which purpose the prestressing frame preferably has a frame surface that is designed to be suitable for an edge end bend.
  • the pretensioning frame is designed to be suitable for end-face bending by gravitation. The disc thus gets its final shape on the prestressing frame.
  • a surface end bend occurs in an inner region of the pane surrounded by an edge region by gravity.
  • the invention extends to the use of the device according to the invention and the method according to the invention for the production of windows for means of transportation for traffic on land, in the air or on water, in particular in motor vehicles, and in particular for rear windows in motor vehicles .
  • the various configurations of the invention can be implemented individually or in any combination.
  • the features mentioned above and to be explained below can be used not only in the combinations indicated, but also in other combinations or on their own without departing from the scope of the present invention.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of the device according to the invention for bending panes in supervision
  • FIG. 4 shows a sectional view of the device from FIG. 1 according to sectional plane B-B;
  • FIG. 5-20 different sectional views of the device of Fig. 1 according
  • Section plane B-B to illustrate the method according to the invention
  • 21A-21B are schematic representations to illustrate the pressing of a disk between a tool and the press frame
  • FIG. 22 shows a flowchart of an exemplary embodiment of the method according to the invention for producing a pane.
  • FIG. 1 shows, on the basis of a schematic illustration in supervision, essential components of an exemplary embodiment of the overall together with the device designated by the reference number 1 for bending panes.
  • FIGS. 2 and 3 show a sectional illustration of the device 1 according to the sectional plane AA
  • FIG. 4 shows a sectional illustration according to the sectional plane BB.
  • the device 1 comprises a bending chamber 2 for bending (glass) panes 52, a preheating zone 3 arranged to the side of the bending chamber 2 with a (preheating zone) heating device 33 (not shown in FIG. 1) for heating the panes to the bending temperature, and a prestressing zone 4 also arranged to the side of the bending chamber 2 for cooling or prestressing (tempering) bent panes.
  • the preheating zone 3 and the pretensioning zone 4 are arranged in a top view at an angle of 90 ° to the bending chamber 2 and are functionally coupled thereto, the preheating zone 3 and the pretensioning zone 4 being designed as spatially separate areas of the device 1.
  • a module-like feed chamber for a press frame 8 (in 1 not shown), hereinafter referred to as "press frame module 6" arranged on the bending chamber 2.
  • the preheating zone 3, the pretensioning zone 4, the tool carrier module 5 and the press frame module 6 are arranged on four sides of the bending chamber 2 and with the bending chamber 2 functionally coupled.
  • the tool carrier module 5 is shown in two spatially different positions. In a first position, the tool carrier module 5 is arranged on the bending chamber 2 and functionally coupled to it. In a second position (to the right of the first position in FIG. 1), the tool carrier module 5 is spatially separated from the bending chamber 2 and is not functionally coupled to the bending chamber 2. Analogously to the tool carrier module 5, the press frame module 6 can be brought into a position spatially separated from the bending chamber 2, which is not shown in FIG. 1.
  • the bending chamber 2 comprises an insulating bending chamber wall 9, which delimits a cavity of the bending chamber 2, hereinafter referred to as the bending chamber cavity 10, from the external environment.
  • the bending chamber cavity 10 is heated and maintained at a temperature (bending temperature) suitable for the bending process of the panes.
  • the bending chamber 2 has a heating device, which is not shown.
  • a stationary tool 11 which remains permanently inside the bending chamber 2 for processing disks, ie during the period while the same disk is being processed in the device 1, is not inserted into the bending chamber 2 from outside and / or is removed from the bending chamber 2.
  • the stationary tool 11 has a holder 12 which can be displaced relative to the bending chamber wall 9 at least in the vertical direction by means of a holder movement mechanism 14, which is not shown in any more detail. It is also possible for the holder 12 to be displaceable with at least one horizontal movement component. At the lower end of the holder 12, the stationary tool 11 is detachably mounted.
  • the stationary tool 11 has a downward, convex contact surface 15 for the flat contact of a disk 52. With a corresponding system pressure, the disk 52 can be bent on the respective contact surface 15.
  • the contact surface 15 has an end-to-end outer surface section 16 and an inner surface section 17 with different surface contours (surface shapes), the inner surface section 17 being completely surrounded (edged) by the outer surface section 16.
  • the stationary tool 11 comprises a combined suction / blowing device 18 (not shown in more detail) for sucking a disk 52 against the contact surface 15 or removing a disk 52 fixed on the contact surface 15.
  • the contact surface 15 can, for example, have uniformly distributed holes (not shown) and / or an edge apron.
  • a disc 52 can be pulled against the contact surface 15 by a depression created in the holes or edge skirt.
  • the disk 52 can be removed from the contact surface 15 if an overpressure is generated in the holes.
  • the bending chamber 2 also has a blowing device 19, not shown, by means of which a flowing gaseous fluid, for example an air stream 55, can be generated in the vertical direction in order to raise a disk 52 against gravity and in particular against the contact surface 15 of the (lowered) to press stationary tool 1 1.
  • the prestressing zone 4 for prestressing curved panes is located on the side of the bending chamber 2.
  • the prestressing zone 4 has two so-called prestressing boxes 20, which are arranged offset to one another in the vertical direction. By means of the two preload boxes 20, an air stream for air cooling of a disc 52 located between the two preload boxes 20 can be generated in order to preload the disc 52.
  • a prestressing frame 21 is provided, which is located in FIG. 2 below the stationary tool 11.
  • the biasing frame 21 can be moved between the bending chamber 2 and the biasing zone 4 (e.g. in a horizontal plane) by means of a biasing frame movement mechanism, which is not shown in detail.
  • the pretensioning frame 21 can translate between a first pretensioning frame position 22, which is located between the two pretensioning boxes 20, and a second pretensioning frame position 23 within the bending chamber 2, which is, for example, directly below the stationary tool 11 and be moved here.
  • the bending chamber wall 9 has a first bending chamber opening 24 which opens into the bending chamber cavity 10.
  • the first bending chamber opening 24 can be closed by a first bending chamber door 25, so that the bending chamber cavity 10 can be opened to the outside or closed to the outside environment.
  • the pretensioning frame 21 can be moved through the opened first bending chamber opening 24 into the bending chamber cavity 10 in order to receive a finished bent disc 52 and to transport it into the pretensioning zone 4. From there, the tempered pane 52 can be removed in a simple manner and processed further.
  • the device 1 further comprises a movable (mobile) press frame module 6, which is arranged opposite the prestressing zone 4 on the outside of the bending chamber 2.
  • the press frame module 6 is designed here, for example, in the form of a closed or closable chamber.
  • the press frame module 6 comprises an insulating press frame module wall 26, which delimits a cavity of the press frame module 6, hereinafter referred to as “press frame module cavity 27”, from the external environment.
  • the press frame module cavity 27 is accessible from the outside through at least one press frame module opening 28 opening into the press frame module cavity 27.
  • the press frame module opening 28 can be closed by a press frame module door 29. As shown in FIG.
  • the press frame module 6 is arranged on the outside of the bending chamber 2, the press frame module opening 28 being in a position opposite to a second bending chamber opening 30 of the bending chamber cavity 10.
  • the bending chamber cavity 10 is accessible from the outside through the second bending chamber opening 30 opening into the bending chamber cavity 10.
  • the second bending chamber opening 30 can be closed by a second bending chamber door 31. If the press frame module 6 is arranged on the bending chamber 2, the bending chamber cavity 10 and the press frame module cavity 27 can be spatially connected to one another by opening both the press frame module door 29 and the second bending chamber door 31. On the other hand, by closing the press frame module door 29 and / or the second bending chamber door 31, the press frame module cavity 27 can be spatially separated from the bending chamber cavity 10.
  • the press frame module 6 can be moved relative to the bending chamber 2 and, for this purpose, has an actively or passively drivable press frame module movement mechanism 32 for moving the press frame module 6 (for example roller bearing).
  • the press frame module 6 can be delivered to the bending chamber 2 or removed from the bending chamber 2 by means of the press frame module movement mechanism 32.
  • the press frame module cavity 27 is of an insulating press frame module wall
  • the press frame module cavity 27 can be heated and maintained at a desired temperature.
  • the press frame module 6 has a press frame module heating device 34, which is designed in the form of FIG. 2 in the form of radiant heaters.
  • the radiant heaters are arranged, for example, distributed in several radiant heater fields.
  • the press frame module 6 also has an elongated press frame carrier 35 for the press frame 8.
  • the press frame carrier 35 is movable by a press frame carrier movement mechanism 36.
  • the press frame carrier movement mechanism 36 is arranged outside the heatable press frame module cavity 27 (in FIG. 2 below the press frame module cavity 27).
  • the press frame carrier movement mechanism 36 comprises a pinion chain mechanism equipped with a driven pinion, which is known to the person skilled in the art and is not further described must be explained.
  • the press frame carrier 35 is located completely within the press frame module cavity 27.
  • the press frame module door 29 and the second bending chamber door 31 are each in a closed position.
  • the press frame 8, which is used for pressing and storing a disk 63, is fixedly attached to the free end of the press frame carrier 35.
  • the press frame support 35 comprises, for example, two parallel support arms, between which the press frame 8 is fastened.
  • the press frame 8 is moved within the bending chamber 2 by the press frame carrier 35 supplied from outside the bending chamber 2, the fact that the press frame carrier movement mechanism 36 is arranged outside the heatable press frame module cavity 27 , a very precise positioning of the press frame 8 is made possible in a particularly advantageous manner.
  • FIG. 3 in which the device 1 according to the sectional view A-A of FIG. 2 is shown in a different process situation.
  • the pretensioning frame 21 is in the first pretensioning frame position 22 between the two pretensioning boxes 20.
  • the press frame 8 was moved from a press frame rest position 37 to a press frame working position 38 within the bending chamber by moving the press frame carrier 35 2 transported.
  • the free end of the press frame carrier 35, which carries the press frame 8 was introduced into the bending chamber cavity 10 (part of the press frame carrier 35 is still located in the press frame module 6).
  • the press frame 8 can also be quickly heated outside the bending chamber cavity 10 to a temperature suitable for the bending of panes 52.
  • the bending chamber cavity 10 can be closed particularly advantageously by closing the bending chamber doors 25, 31, for example in order to remove the press frame module 5 from the bending chamber 2 without the bending chamber cavity 10 being exposed to the external environment, in particular a greater temperature drop in the bending chamber cavity 10 can be avoided. Accordingly, another module can be coupled to the bending chamber 2 in a simple manner.
  • FIG. 4 shows the Bending chamber 2, the tool carrier module 5 arranged on the bending chamber 2 and functionally coupled to it, and part of the preheating zone 3.
  • the bending chamber 2 comprises the bending chamber cavity 10, in which the stationary tool 11 is arranged.
  • the stationary tool 11 has a contact surface 15 with an outer surface section 16 and an inner surface section 17.
  • the preheating zone 3 Arranged on the bending chamber 2 and functionally coupled to it is the preheating zone 3, in which the disks 52 can be heated to a temperature suitable for bending.
  • panes can be successively transported from the preheating zone 3 into the bending chamber 2 and finally into the pretensioning zone 4.
  • a roller bed with a plurality of cylindrical rollers is provided for the flat support of panes 52.
  • the movable (mobile) tool carrier module 5 is described, which is arranged opposite the preheating zone 3 on the outside of the bending chamber 2.
  • the tool carrier module 5 comprises a substructure 43, on which a tool carrier 44 is attached.
  • a tool 7 is permanently attached to the tool carrier 44, which becomes a transportable tool due to the mobility of the tool carrier 44.
  • the tool carrier 44 opens into a tool carrier module cavity 46, which is surrounded by a tool carrier module wall 45 and is open towards the bending chamber 2 and in which the transportable tool 7 is arranged.
  • the bending chamber wall 9 has a fourth bending chamber opening 47 on the side on which the tool carrier module 5 can be fed.
  • the tool carrier module cavity 46 opens into the bending chamber cavity 10.
  • the tool carrier module wall 45 has contact with the outside of the bending chamber wall 9.
  • the fourth Bending chamber opening 47 and / or the tool holder module cavity 46 are each to be provided with a door for separate closing.
  • the tool holder module cavity 46 can be heated to a desired temperature.
  • the tool carrier module cavity 46 like the bending chamber 2, is heated and held to a temperature (bending temperature) suitable for the bending process of the disks 52 in order to heat the transportable tool 7 to a corresponding temperature.
  • the tool holder module cavity 46 has a heating device (for example a heater), for example in the form of radiant heaters, which is shown in FIG is not shown.
  • the hot and cold areas are identified in FIG. 4 by "H (ot)" and "C (old)".
  • the tool carrier module 5 is movable relative to the bending chamber 2 and for this purpose has an actively driven or passively drivable tool carrier module movement mechanism 50 for moving the tool carrier module 5.
  • the tool carrier module movement mechanism 50 comprises a plurality of passively drivable wheels 49 By means of the tool carrier module movement mechanism 50, the tool carrier module 5 can be delivered to the bending chamber 2 or removed from the bending chamber 2.
  • the tool carrier module 5 has the elongated tool carrier 44 for the transportable tool 7.
  • the tool carrier 44 can be moved in the vertical direction by a tool carrier movement mechanism 48 and with a horizontal movement component, so that the tool 7 attached to the tool carrier 44 for processing a respective disk 52 can be inserted into the bending chamber 2 and removed therefrom.
  • the tool carrier movement mechanism 50 is arranged outside the heatable tool carrier module cavity 46, so that the transportable tool 7 can be positioned very precisely within the bending chamber 2 in a particularly advantageous manner.
  • the portable tool 7 can be moved by moving the tool carrier 44 within the bending chamber 2 with a horizontal movement component and in the vertical direction (in each case 1-dimensional and reciprocal).
  • the transportable tool 7 has a contact surface 15 'directed downwards, which is composed of an outer surface section 16' and an inner surface section 17 '.
  • the contact surfaces 15, 15 'of the tools 11, 7 can have the same or different surface contours.
  • the surface contours are preferably different from one another.
  • the outer surface section 16 'of the contact surface 15' of the transportable tool 7 has a surface contour which is or is adapted to a desired edge end bend, ie final bend, in a (eg strip-shaped) edge region 53 of a disk 52 such a final bend is made possible in the further processing of the disk 52.
  • the terminal edge region of the pane 52 borders on a pane (cut) edge arranged perpendicular to the two opposite pane main surfaces.
  • the inner surface section 17 'of the contact surface 15' of the transportable tool 7 has a surface contour which is a surface pre-bend, ie non-final Bending corresponds in an inner area 54 completely surrounded by the edge area of the pane 52.
  • the outer surface section 16 of the contact surface 15 of the stationary tool 11 has the same surface contour as the outer surface section 16 'of the contact surface 15' of the transportable tool 7 and has a surface contour which is adapted to the desired end bending in the edge region 53 of the disk 52.
  • the inner surface section 17 of the contact surface 15 of the stationary tool 11 has a surface contour which corresponds to a surface end bend, ie a final or quasi final bend, is adapted in the inner region 54 of the disk 52 or enables this in the further processing.
  • the portable tool 7 also has a combined suction / blowing device 18 '(not shown in more detail) for disks, as a result of which a disk 52 is sucked onto the contact surface 15' and thereby temporarily fixed to the contact surface 15 'or removed from the contact surface 15' can be.
  • An underpressure or overpressure on the contact surface 15 ′ can be generated by a venturi device 13 based on the venturi principle, which is located in the cold region of the tool carrier module 5.
  • the press frame 8 is used for storing and pressing disks in cooperation with a tool.
  • the press frame 8 has an edge (for example strip-shaped) press surface 51 (see FIGS. 21A and 21B), the surface contour of which is complementary to the surface contour of the outer surface sections 16, 16 'of stationary tool 11 and transportable Tool 7 is.
  • the upward pressing surface 51 is suitable for pressing an overlying disc 52 in an edge region 53.
  • the press frame 8 is not formed over the entire surface, but instead has an internal opening which allows the inner region 54 of a disc 52 placed thereon to be bent by gravity.
  • FIG. 4 shows an initial situation in which the transportable tool 7 is located within the tool holder module cavity 46 and has been heated to a temperature suitable for machining disks.
  • the bending chamber cavity 10 and the tool holder module cavity 46 are heated to the same temperature.
  • the transportable tool 7 can, in particular, be arranged entirely within the tool carrier module cavity 46.
  • the stationary tool 11 is located within the bending chamber 2.
  • the preheating zone 3 (not shown) there is a disk 52 which is heated to a temperature suitable for bending.
  • FIG. 5 shows the device 1 for bending panes at a later point in time than in FIG. 4.
  • the pane 52 is in a removal position.
  • the tool carrier 44 is retracted into the bending chamber 2 in the horizontal direction, the transportable tool 7 being in an elevated position in the vertical direction directly above the disk 52.
  • the stationary tool 11 is likewise located in the bending chamber 2 and is arranged above and / or to the side of the portable tool 7.
  • the stationary tool 11 in the bending chamber 2 is preferably moved upwards so far that there is space for the transportable tool 7 in the vertical direction directly below the stationary tool 11.
  • FIG. 6 shows the device 1 for bending panes at a later point in time than in FIG. 5.
  • the tool carrier 44 with the transportable tool 7 located thereon has been lowered in the vertical direction, so that the transportable tool 7 is now just above the pane 52 is located. There has been no change in the position of the transportable tool 7 in a horizontal direction.
  • FIG. 7 shows the device 1 for bending panes at a later point in time than in FIG. 6.
  • the pane 52 is blown by blowing with the fluid stream of a gaseous fluid generated by the blowing device 19, here for example an air stream 55 (symbolically represented by arrows ), raised on its underside in the vertical direction from the removal position in the direction of the portable tool 7 and finally pressed by the air flow 55 against its contact surface 15 '.
  • the transportable tool 7 has been lowered to such an extent that the disk 52 can be pressed against the contact surface 15 ′ by the air flow 55.
  • FIG. 8 shows the device 1 for bending disks at a later point in time than in FIG. 7.
  • the air flow 55 presses the disk 52 against the contact surface 15 ′.
  • the disk 52 is fixed on the contact surface 15 'by suction by means of the suction / blowing device 18'.
  • the suction / blowing device 18 ' temporarily fixes the disk 52 to the contact surface 15' by means of a vacuum. This is symbolically represented in FIG. 8 by arrows pointing upwards.
  • the disk 52 Due to the typically incomplete contact with the contact surface 15 ′, the disk 52 is only pre-bent in the edge region 53. As a rule, the pressing pressure by the air flow 55 is not sufficient to produce an end-end bend in the edge region 53 of the plate 52.
  • the suction effect of the suction / blowing device 18 ' serves essentially only to hold the disk 52 to the contact surface 15' until the press frame 8 has moved under the disk 52 and has only a slight influence on the bending of the disk 52 this removes bubbles in the disk 52. In the inner region 54 of the disk 52, only a surface pre-bending is possible anyway through the contact surface 15 '.
  • FIG. 8 shows a situation in which the disk 52 is already fixed on the contact surface 15 '.
  • FIG. 9 shows the device 1 for bending panes at a later time than in FIG. 8.
  • the air flow 55 coming from below has been stopped.
  • the disc 52 is only fixed by the vacuum generated by the suction / blowing device 18 'on the contact surface 15'.
  • the tool carrier 44 with transportable tool 7 and disk 52 attached to it was moved upwards in the vertical direction.
  • FIG. 10 shows the device 1 for bending panes at a later time than in FIG. 9. This shows a situation in which the press frame 8 was moved into the press frame working position 38 in the vertical direction directly below the pane 52 ( 10 in the drawing plane). The tool carrier 44 with the portable tool 7 and the disk 52 fixed thereon is still in an elevated position.
  • FIG. 1 1 shows the device 1 for bending disks at a later point in time than in FIG. 10.
  • the transportable tool 7 is brought down from the elevated position into a lowered position by lowering the tool carrier 44 in a vertical direction in which the disc 52 fixed to the contact surface 15 'has a flat contact with the press frame 8.
  • FIG. 12 shows the device 1 for bending panes at a later point in time than in FIG. 1 1.
  • the pane 52 is now placed on the press frame 8.
  • the pane 52 is removed by means of a suction / Blower device 18 'is blown with the generated stream of a gaseous fluid.
  • the pressing surface 51 preferably has a shape complementary to the outer surface section 16 'of the contact surface 15'.
  • the disc 52 can be pressed between the contact surface 15 'of the transportable tool 7 and the press frame 8, which is illustrated by arrows pointing downwards.
  • the disk 52 is pressed in the edge region 53 between the outer surface section 16 'of the contact surface 15' and the pressing surface 51 of the pressing frame 8 (see FIGS. 21 A and 21 B).
  • the edge region 53 of the pane 52 is passively pre-bent by finished weight or optionally actively by pressing or bent.
  • a great advantage of pressing the disk 52 against the press frame 8 is a very precise definition of the position of the disk 52 on the press frame 8 which results from this, with an exact contact of the edge region 53 of the disk 52 on the press surface 51 of the press frame 8.
  • This enables an exact Fixation of the position of the pane 52 on the press frame 8 by the stopper resting against the pane 52, which is not shown in more detail.
  • This enables a particularly high production accuracy and good optical quality of the curved pane to be achieved.
  • the fixing of the disk 52 to the contact surface 15 ' was canceled by stopping the suction effect of the suction / blowing device 18'.
  • FIG. 13 shows the device 1 for bending disks at a later time than in FIG. 12.
  • the tool carrier 44 and thus the transportable tool 7 have been moved upwards in the vertical direction.
  • the pane 52 is additionally passively pre-bent in the inner region 54 by its own weight. If compression takes place in the edge area 53, the surface pre-bending due to gravity can be restricted in the inner area 54.
  • FIG. 14 shows the device 1 for bending panes at a later point in time than in FIG. 13.
  • the pane 52 is also mounted on the press frame 8.
  • the tool carrier 44 was moved from the bending chamber 2 into the tool carrier module in a horizontal direction 5 moves back, the transportable tool 7 being located within the tool carrier module cavity 46.
  • FIG. 15 shows the device 1 for bending panes at a later point in time than in FIG. 14.
  • the stationary tool 11 was lowered onto the pane 52, which rests on the press frame 8, in the vertical direction and in the edge region 53 between the outer surface. Chen section 16 of the contact surface 15 and the pressing surface 51 of the press frame 8 pressed.
  • the pressing surface 51 has a complementary shape to the outer surface section 16 of the contact surface 15.
  • the edge region 53 of the disk 52 is hereby preferably finished, i.e. gets its edge end bend. However, it is also possible for the edge region 53 of the pane 52 to be pre-bent.
  • the pressing frame 8 is not moved during the storage of the pane 52 on the press frame 8, so that there is no risk of a change in position of the pane 52 on the press frame 8 and panes 52 of particularly high quality can be produced.
  • FIG. 16 shows the device 1 for bending disks at a later point in time than in FIG. 15.
  • the disk 52 is fixed on the contact surface 15 of the stationary tool 11 by suction using the suction / blowing device 18 Suppressing fluid flow at the contact surface 15 is symbolically represented by arrows.
  • FIG. 16 shows a situation in which the stationary tool 11 with the disk 52 fixed thereon was moved upwards in the vertical direction.
  • the suction of the disk 52 against the contact surface 15 can also bend the disk 52 serve, ie sufficient mechanical pressure is generated by the suction in order to bend the disk 52 in the desired manner. In this way, the disk 52 can be pre-bent on the contact surface 15 in the inner region 54.
  • a previously generated edge end bend in the edge region 53 can be maintained on the disk 52.
  • FIG. 17 shows the device 1 for bending panes at a later time than in FIG. 16.
  • FIG. 17 shows a situation in which the press frame 8 is moved by moving the press frame carrier 35 in a horizontal plane from the press frame working position 38. half of the bending chamber 2 into the press frame rest position 37 within the press frame module cavity 27 of the press frame module 5.
  • the leader frame 21 has been moved from the first leader frame position 22 between the two leader boxes 20 into the Move the second pretensioning frame position 23 within the bending chamber 2.
  • the second pretensioning frame position 23 is located vertically directly below the stationary tool 11. In order to allow entry into the bending chamber 2, the first bending chamber door 25 was opened for a short period of time, thereby avoiding any noteworthy temperature loss can.
  • FIG. 18 shows the device 1 for bending panes at a later point in time than in FIG. 17.
  • the stationary tool 11 with the pane 52 fixed thereon was moved downwards in the vertical direction, the pane 52 being placed on the prestressing frame 21.
  • the fixing of the disk 52 to the contact surface 15 was canceled by stopping the suction effect of the suction / blowing device 18.
  • the depositing of the pane 52 is supported by blowing on it with a fluid flow which is generated by means of the suction / blowing device 18.
  • FIG. 19 shows the device 1 for bending disks at a later time than in FIG. 18.
  • FIG. 19 shows a situation in which the stationary tool 11 has been moved upwards in the vertical direction.
  • the disc 52 is placed on the biasing frame 21.
  • FIG. 20 shows the device 1 for bending panes at a later time than in FIG. 19.
  • the pane 52 on the biasing frame 21 was moved from the second biasing frame position 23 within the bending chamber 2 to the first biasing frame position 22 between the two Tension boxes 20 move where the disc 52 is annealed.
  • the first bending chamber door 25 was opened for a short period of time, as a result of which a significant temperature loss can be avoided.
  • an edge end bending and a surface end bending of the disk 52 can take place by gravity.
  • the prestressing frame 21 preferably has an upwardly directed frame surface for contact with the pane 52, which is designed to be suitable for an edge end bend.
  • the prestressing frame 21 is preferably designed to be suitable for a surface end bending by gravitation.
  • FIG. 20 a further disk 52 which has been heated to a temperature suitable for bending can now be transported into the bending chamber 2.
  • the situation in FIG. 20 is similar to the situation in FIG. 4.
  • the bending process can be continued continuously in this way.
  • the successive steps of an exemplary method for producing the pane 52 by means of the device 1 are illustrated in FIG. 22 using a flowchart.
  • a disk 52 heated to the bending temperature is provided in the removal position within the bending chamber 2.
  • the disk 52 is fixed on the contact surface 15 ', 15 of a tool selected from the portable tool 7 and the stationary tool 11.
  • the press frame 8 is positioned in the press frame working position 38 within the bending chamber 2.
  • pressing can take place between the contact surface 15 ', 15 of the tool 7, 11, on which the disk 52 is fixed, and the press frame 8.
  • the pane 52 is placed on the press frame 8.
  • the disk 52 is pressed between the contact surface 15, 15 'of the other tool 7, 11 (not selected in step II) and the press frame 8.
  • a seventh step VII the disk 52 is fixed on the contact surface 15, 15 'of the tool 11, 7 with which the pressing was last carried out.
  • the pretensioning frame 21 is positioned in the second pretensioning frame position 23 in the bending chamber 2.
  • the disc 52 is placed on the pretensioning frame 21.
  • a tenth step X the pane 52 is transported on the prestressing frame 21 to the prestressing zone 4 for the thermal prestressing of the pane 52.
  • the transportable tool 7 is used for the first fixing of the disc 52 and the stationary tool 11 for the second fixing of the disc 52
  • the transportable tool 7 is attached to the contact surface 15 ′ before the disc 52 is fixed. inserted into the bending chamber 2 and removed from the bending chamber 2 after the disc 52 has been placed on the press frame 8.
  • the stationary tool 11 remains permanently in the bending chamber 2 at least from the provision of the disk 52 in the bending chamber 2 until the disk 52 is transported on the prestressing frame 21.
  • the transportable tool 7 is placed after the disc 52 has been placed on the press frame 8 Bending chamber 2 inserted and after placing the disc 52 on the Preload frame 21 removed from the bending chamber 2.
  • the stationary tool 11 remains permanently in the bending chamber 2, at least from the provision of the disk 52 in the bending chamber 2 to the transport of the disk 52 on the pretensioning frame 21 - Inexpensive production of even complex curved panes is made possible.
  • Existing systems for bending panes can be easily retrofitted using the transportable tool that is inserted into the bending chamber from outside.
  • the transportable tool By inserting and removing the transportable tool, space is created for using the stationary tool, ie processing of disks by several tools is made possible in a simple manner.
  • the quality of the disks can be further improved if the position of the tools is changed only in the vertical direction and the disks are not moved during storage on the press frame.
  • the accuracy of the positioning of the pane on the press frame by pressing the pane between the tool and the press frame in the edge region of the pane is particularly advantageous.
  • the portable tool that can be inserted into the bending chamber from the outside can be positioned within the bending chamber with a particularly high degree of accuracy. This applies in particular if a movement mechanism for the tool holder is arranged outside of a heated area.
  • the tools can be exchanged and / or serviced quickly and easily.
  • the transportable tool can be heated particularly advantageously before use, so that the processing of disks can be carried out quickly, in particular after a tool change.
  • the invention thus enables particularly cost-effective production of, in particular, complexly shaped panes with relatively short cycle times and particularly high quality requirements.

Abstract

L'invention concerne un procédé pour le cintrage de vitres, dans lequel, dans une chambre de cintrage, une vitre est fixée sur une surface de contact d'un outil et placée par l'outil sur un cadre, l'outil, avant la fixation de la vitre dans la chambre de cintrage, étant introduit sans vitre fixée dans la chambre de cintrage et, après le placement de la vitre sur le cadre, étant retiré sans vitre fixée de la chambre de cintrage. L'invention concerne en plus un dispositif pour le cintrage de vitres, lequel comprend une chambre de cintrage, qui peut être chauffée à une température appropriée pour le cintrage de vitres, au moins un outil stationnaire dans la chambre de cintrage comprenant une surface de contact pour la fixation d'une vitre, lequel est disposé de manière permanente dans la chambre de cintrage durant le traitement d'une vitre, ainsi qu'au moins un outil transportable comprenant une surface de contact pour la fixation d'une vitre, lequel est disposé temporairement en dehors de la chambre de cintrage durant le traitement de la vitre dans la chambre de cintrage. L'outil transportable est fixé dans un support d'outil mobile, l'outil transportable pouvant être introduit dans la chambre de cintrage et retiré de la chambre de cintrage par le déplacement du support d'outil, l'outil transportable (7) étant conçu pour être introduit dans la chambre de cintrage (2) sans vitre (52) fixée sur lui et pour être retiré de la chambre de cintrage (2) sans vitre (52) fixée sur lui.
EP19794151.1A 2018-10-31 2019-10-28 Procédé et dispositif pour le cintrage des vitres Withdrawn EP3873858A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18203721 2018-10-31
PCT/EP2019/079321 WO2020089133A1 (fr) 2018-10-31 2019-10-28 Procédé et dispositif pour le cintrage des vitres

Publications (1)

Publication Number Publication Date
EP3873858A1 true EP3873858A1 (fr) 2021-09-08

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EP19794151.1A Withdrawn EP3873858A1 (fr) 2018-10-31 2019-10-28 Procédé et dispositif pour le cintrage des vitres

Country Status (11)

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US (1) US20210147277A1 (fr)
EP (1) EP3873858A1 (fr)
JP (1) JP2021533071A (fr)
KR (1) KR20210069099A (fr)
CN (1) CN111630007A (fr)
BR (1) BR112020022238A2 (fr)
MA (1) MA54047A (fr)
MX (1) MX2021004938A (fr)
PE (1) PE20211164A1 (fr)
RU (1) RU2760812C1 (fr)
WO (1) WO2020089133A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137931A1 (fr) * 2017-01-30 2018-08-02 Saint-Gobain Glass France Procédé pour cintrer une plaque de verre
FI20185664A1 (fi) * 2018-07-31 2020-02-01 Taifin Glass Machinery Oy Menetelmä laitteessa lasilevyjen taivuttamiseksi ja laite lasilevyjen taivuttamiseksi

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US4666493A (en) * 1985-12-19 1987-05-19 Ppg Industries, Inc. Sheet positioning system
FR2601668A1 (fr) 1986-07-16 1988-01-22 Saint Gobain Vitrage Perfectionnement au bombage de plaques de verre
US4711653A (en) * 1986-12-29 1987-12-08 Ppg Industries, Inc. Innovative press bending of thermoplastic sheets
DE4208219C1 (fr) * 1992-03-14 1993-05-06 Vegla Vereinigte Glaswerke Gmbh, 5100 Aachen, De
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CA2141830C (fr) * 1994-02-14 1999-06-01 Ppg Industries Ohio, Inc. Methode et installation pour bomber le verre en feuilles
DE69601267T2 (de) * 1995-06-07 1999-07-08 Pilkington Glass Ltd Verfahren zum biegen von glasscheiben
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MXPA04000233A (es) * 2002-03-13 2004-05-04 Asahi Glass Co Ltd Metodo y aparato para flexionar un hoja de vidrio.
FR2852951B1 (fr) 2003-03-26 2007-02-16 Saint Gobain Procede de bombage de feuilles de verre par pressage et aspiration
EP1550639A1 (fr) * 2003-12-26 2005-07-06 Asahi Glass Company, Limited Procédé et dispositif pour le bombage de feuilles en verre
FR2880343B1 (fr) 2004-12-31 2007-06-22 Saint Gobain Procede de bombage de feuilles de verre par aspiration
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Publication number Publication date
RU2760812C1 (ru) 2021-11-30
MA54047A (fr) 2022-02-09
JP2021533071A (ja) 2021-12-02
KR20210069099A (ko) 2021-06-10
MX2021004938A (es) 2021-06-08
WO2020089133A1 (fr) 2020-05-07
CN111630007A (zh) 2020-09-04
US20210147277A1 (en) 2021-05-20
BR112020022238A2 (pt) 2021-06-08
PE20211164A1 (es) 2021-06-28

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