EP3661880A1

EP3661880A1 - Method and device for bending panes

Info

Publication number: EP3661880A1
Application number: EP18732353.0A
Authority: EP
Inventors: Arthur PALMANTIER; Jean Jacques BRIS; Jack PENNERS; Achim ZEICHNER; Werner Kahlen
Original assignee: Saint Gobain Glass France SAS; Compagnie de Saint Gobain SA
Current assignee: Saint Gobain Glass France SAS; Compagnie de Saint Gobain SA
Priority date: 2017-07-31
Filing date: 2018-06-22
Publication date: 2020-06-10
Also published as: CN109600999B; DE202018006728U1; BR112020001804A2; JP2020528866A; MA49735A; RU2744119C1; MX2020001181A; US20200247705A1; WO2019025078A1; CO2020001042A2; CA3071357A1; KR20200035081A; CA3071357C; KR102332693B1; CN109600999A; JP6985494B2

Abstract

The invention relates to a method for bending panes, comprising the following steps: providing a pane heated to a bending temperature; securing the pane to a contact surface of the first bending mould; positioning a press frame for the pane in a first press frame position assigned to the first bending mould; transporting the pane on the press frame to a second press frame position assigned to the second bending mould; securing the pane on a contact surface of the second bending mould, wherein the press frame is attached to a carrier introduced into the bending zone by a delivery module, and wherein the press frame is laterally moved relative to the first and second bending mould by moving the carrier between the first press frame position and the second press frame position. The invention also relates to a device for bending panes, comprising a delivery module, preferably which can be moved relative to the bending zone, and which is delivered to the bending zone such that a carrier with a press frame for a pane can be introduced into the bending zone.

Description

Method and device for bending discs

The invention relates to a method and apparatus for bending discs and their use. In the industrial series production of glass panes, various bending methods are used which have already found their way into the patent literature.

For example, WO 2012/080072 describes a method with a stepwise bending of glass panes in the peripheral and interior regions. Here, the glass sheet is first driven on a Vorbiegering in an oven, wherein the disc edge is pre-bent, followed by a bending of the disc edge by a first aspirator, depositing and bending the glass in the area on a Endbiegering and final bending to the desired final geometry by means a second suction device. Due to the stepwise bending of the glass pane, optical defects can be reduced for complex pane shapes.

WO 2004/087590 and WO 2006072721 each describe a method in which the glass sheet is first pre-bent on a bending frame by gravity, followed by a press bending by means of an upper or lower bending mold.

In EP 255422 and US 5906668 each bending of a glass sheet is described by suction against an upper bending mold.

EP 1550639 A1, US 2009/084138 A1 and EP 2233444 A1 each show a device in which a press frame can be transported between bending stations on a slide which is displaceably mounted on a stationary carrier.

There is generally a need for relatively compact systems for bending glass panes, whereby the glass panes should be able to be produced with relatively short cycle times and low production costs. In addition, high quality requirements should be achievable.

Accordingly, the object of the present invention is to provide a comparison with the previously known method improved method and a corresponding device for bending glass sheets available. These and other tasks are after the Proposal of the invention by a device and a method for bending glass sheets with the features of the independent claims solved. Advantageous embodiments of the invention will become apparent from the dependent claims. For the purposes of the present invention, the term "pre-bending" refers to an incomplete bending of the pane with respect to a definable or definable final bend (final geometry or final shape) of the pane. For example, the pre-bend may account for 10 to 80% of the final bend. When used as a "edge pre-bend", the term refers to the incomplete bending of the disk in an end edge region of the disk adjacent to a disk edge, typically a peripheral region surrounding the disk in a strip-like manner. For example, the strip width is in the range of 3 to 150 mm. The disk edge is formed by a (cut) surface, which is typically perpendicular to the two opposed disk major surfaces. When used as a "face bend", the term refers to the incomplete bend of the disc in a central or interior area of the disc that is surrounded by the edge area and directly adjacent to the edge area. In contrast, the term "final bend" refers to the complete bending of the disc. When used as a "marginal bend", the term refers to the complete bend in the edge region of the disc, in use as a "face end bend" on the complete bend in the interior of the disc.

The term "disk" generally refers to a glass sheet, in particular a thermally toughened soda-lime glass.

The term "laterally" or "laterally displaceable" denotes a movement with at least one horizontal movement component, whereby a component can be arranged laterally relative to another component.

The inventive device for bending discs comprises a plurality of structurally and functionally delimitable zones. An essential component according to the invention is a bending zone for bending heated panes, which is advantageously equipped with a heating device for heating panes. In particular, for this purpose, the bending zone may be brought to a temperature which permits plastic deformation of discs and is typically in the range of 600 ° C to 750 ° C. The bending zone is preferably designed as a heatable chamber which is closed or closable towards the outside environment, hereinafter referred to as a "bending chamber". The bending chamber has a Biegekammerhohlraum which is completely bounded by a preferably insulated wall. The bending chamber cavity has at least one opening into the bending chamber cavity opening, which is preferably closed by a Bückkam- mertür. The bending zone comprises at least two bending molds, namely a first bending mold and a second bending mold, which are preferably arranged in the bending chamber cavity of a bending zone designed as a bending zone. In an advantageous embodiment of the invention, the first bending mold and the second bending mold each have a contact surface for contacting a disk. The contact surface of the first bending mold and the second bending mold respectively has an outer surface portion and an inner surface portion, and is composed of the outer and inner surface portions. The outer surface portion of the first bending mold and the second bending mold are each formed suitably for a Randendbiegung in an edge region of the disc. Preferably, the inner surface portion of the first bending mold and the second bending mold are each suitably formed for a Flächenvorbiegung in a surrounded by the edge region central or inner region of the disc. Alternatively, the inner surface portion of the second bending mold may be suitably formed for a Flächenendbiegung.

As used herein and hereinafter, the phrase "suitably formed" in the context of the outer surface portion of the contact surface is to be understood so that the outer surface portion is shaped so that a Randendbiegung of the disc can be generated. However, the disc does not necessarily have to be subjected to a marginal end deflection, but it can also be done only a Randvorbiegung. The Randendbiegung is then generated only in the further process management. For this purpose, the outer surface section does not necessarily have to have a shape that is complementary to the shape of a rim-bent disk. In connection with the inner surface portion of the contact surface "suitably formed" means that the inner surface portion is shaped so that a Flächenvorbiegung of the disc can be generated, wherein not necessarily a Flächenvorbiegung must be made. If the inner surface section of the second bending mold is alternatively designed to be suitable for a surface end bend, this means that a surface end bend can be generated, but does not necessarily have to be produced. The surface end bend can also be generated only in the further process control. In this embodiment of the invention, the press frame (eg press ring) described below in connection with the feed module has a pressing surface (contact surface) for pressing a disk which is complementary to the outer surface section of the first bending mold or second bending mold which is suitably designed for a marginal end bend , The pressing surface is formed for example in the form of a strip, for example, with a strip width in the range of 3 to 150 mm. The pressing surface is oriented to contact with a disc upwards. In addition, the pressing frame is suitably designed for surface pre-bending by gravity in the inner area of the pane, whereby sagging of the inner area of the pane downwards by gravity is possible. The press frame may be open for this purpose, ie be provided with a central opening, or be formed over the entire surface, as long as a sagging of the inner area of the pane is made possible. An open design is preferred in view of easier wafer processing. It is understood that a greater width of a strip-shaped pressing surface by a better weight distribution is advantageous with regard to the avoidance of undesired markings (changes of the flat surfaces of the disc), wherein the pressing of the disc in the edge region on the pressing frame of the production of Markings can be counteracted. The pressing surface of the pressing frame has a defined geometry, wherein the pressing frame is sufficiently rigid for this purpose. The pressing frame is shaped, for example, as a casting, wherein the pressing surface is produced for example by milling. In gravity bending, the disc is pre-bent by its own weight. By the prior pressing of the disc edge against the pressing surface of the pressing frame, the Flächenvorbiegung the disc can be reduced. In addition, the use of a stopper for fixing the disc during transport on the pressing frame is made possible in an advantageous manner.

Here, the first bending mold and the pressing frame in the vertical direction are offset relative to each other, so that the disc in the edge region between the outer surface portion of the first bending mold and the pressing surface of the pressing frame is compressible. The disk is thereby bent or bent in the edge area. Advantageously, the first bending mold is coupled to a movement mechanism by means of which the first bending mold can be delivered to the pressing frame. In a corresponding manner, the second bending mold and the pressing frame are displaceable relative to one another in the vertical direction, so that the disk can be pressed in the edge region between the outer surface section of the second bending mold and the pressing surface of the pressing frame. The disk is thereby bent or bent in the edge area. Advantageously, the second bending mold is coupled to a movement mechanism by means of which the second bending mold can be delivered to the pressing frame.

Due to the bending of a disk in the peripheral and internal area, which is carried out in several stages, the bending time at the second bending mold can be considerably reduced in order to shorten the cycle times. In addition, by the particularly accurate positioning of the disc by means of pressing on the press frame complex shaped discs can be made with very high quality.

Preferably, the first bending mold and the second bending mold each have a means for fixing a disk to the respective contact surface. The means for fixing a disk to the contact surface advantageously comprises a pneumatic suction device for sucking in a gaseous fluid, in particular air, through which the disk can be pulled by means of negative pressure against the respective contact surface. For this purpose, the contact surface can be provided, for example, with at least one suction hole, advantageously with a plurality of suction holes distributed uniformly over the contact surface, for example, at which a negative pressure can be applied to a suction effect on the contact surface. The suction device may alternatively or additionally comprise a skirt surrounding the contact surface, by means of which a negative pressure can be generated at the contact surface. The aspirator typically generates an upward flow of gaseous fluid, particularly air, sufficient to hold the disc to the contact surface. This makes it possible in particular to place a frame for receiving the disc fixed to the contact surface, below the disc.

Alternatively or additionally, the means for fixing a disk to the contact surface advantageously comprises a pneumatic blowing device for generating a gaseous flow of fluid, in particular an air stream, which is designed such that a disk is blown from below by the gaseous fluid stream, thereby lifted and can be pressed against the contact surface of the first and second bending mold. The blowing device can in particular be designed such that the disk fixed to the contact surface passes through the pressure exerted by the gaseous fluid flow in the edge region and / or in the inner region, advantageously at least in the edge region, can be pre-bent.

As used herein and hereafter, the term "fixing" refers to a fixation of a disk to the contact surface, whereby the disk can be pressed against the contact surface and / or sucked to the contact surface. The fixing of a disc on the contact surface is not necessarily connected to a bending process. The contact surfaces of the first and second bending mold are each oriented downwards for contact with a disk.

The device according to the invention further comprises a module, hereinafter referred to as "delivery module", which forms a structural unit and preferably, but not necessarily, is movable relative to the bending zone. The delivery module is preferably spatially separable from the bending zone. The delivery module preferably has an actively or passively driven movement mechanism for moving the delivery module relative to the bending zone, for example a roller transport mechanism or air cushion transport mechanism. Preferably, the delivery module is designed in the form of a delivery chamber which has a Zustellkammerlohlraum, which is completely bounded by a preferably insulated wall. Through the wall of the Zustellkammerlohlraum is separated from the external environment. Preferably, the Zustellkammerhohlraum is closed or closed and has at least one opening into the Zustellkammerhohlraum opening, which is preferably closed by a Zustellkammertür. In particular, the delivery chamber cavity can be spatially separated by closing the opening of the bending zone (bending chamber cavity) so that there is no spatial connection between the delivery chamber hollow space and the bending zone. Rather, the Zustellkammerbohlraum and the bending zone (bending chamber cavity) by a wall which is provided with a closable opening, spatially connected or separated from each other.

The delivery module has a movable support with a preferably fixed (immovable) mounted on the support press frame for pressing and transporting a disc. The carrier with pressing frame is preferably arranged in the delivery chamber cavity of a delivery module designed as a delivery chamber or can be arranged (completely) in the delivery chamber cavity. The carrier is movable relative to the two bending molds. In particular, the carrier can be moved into a position in which it is completely received in the delivery chamber cavity (and also not partially in the bending zone). ordered). In contrast to the aforementioned prior art, the pressing frame is not mounted on a movable carriage on a carrier, but a movement of the pressing frame can be done solely by moving the carrier itself. The term "press frame" should be understood to mean that the press frame can serve for pressing the disk, wherein pressing by means of the press frame is advantageous, but not mandatory. In particular, the pressing frame can serve as a transport frame exclusively for transporting the disc between the bending forms (without pressing).

The delivery module is delivered to the bending zone or preferably deliverable, that the carrier with pressing frame (from a position outside the bending zone) is inserted into the bending zone. Preferably, a delivery module designed in the form of a delivery chamber is delivered to a bending zone designed in the form of a bending chamber or preferably deliverable, wherein the delivery chamber cavity can be connected to the bending chamber cavity. For this purpose, the Zustellkammerlohlraum has at least a first opening, which can be brought into a Gegenüberstellungsposition with a second opening of the bending chamber cavity of the bending chamber, so that a preferably aligned connection of Zustellkammerbohlraum and Biegekammerhohlraum can be produced. Preferably, the first opening of the Zustellkammerlohls and / or the second opening of the Biegekammerhohlraums are each provided with a door through which the associated opening can be closed. Essential is the connectability of Zustellkammerhohlraum and Biegekammerhohlraum, in particular by opening at least one door between Zustellkammerhohlraum and Biegekammerhohlraum.

According to the invention, the delivery module is delivered to the bending zone so that the pressing frame moves relative to the carrier by moving the carrier (introduced from outside the bending zone into the bending zone) between a first pressing frame position associated with the first bending form and a second pressing frame position associated with the second bending form is movable laterally to the first and second bending mold. Preferably, the first press frame position is in the vertical direction (eg directly) below the first bending mold and the second press frame position in the vertical direction (eg directly) below the second bending mold. Advantageously, the pressing frame in a horizontal plane reciprocally and translationally (ie 1-dimensional) movable. In addition, the carrier with pressing frame can be (fully) moved back into the delivery module, wherein it is preferred if the carrier with pressing frame can be completely received in the delivery chamber cavity of a delivery module designed in the form of a delivery chamber. In the apparatus according to the invention, a movement of the pressing frame within the bending zone (eg bending chamber) takes place by a movement of the supplied from outside the bending zone carrier, which allows in a particularly advantageous manner, a very accurate positioning of the pressing frame. The carrier is coupled to its movement with a movement mechanism. In fact, to meet very high quality requirements for the discs produced, very precise positioning of the discs relative to the bending dies is required, which typically requires an accuracy of less than 1 mm, typically at least about 0.5 mm. In order to avoid errors due to thermal expansion in the hot bending zone, advantageously a movement mechanism for the carrier can be arranged in a cool area outside the hot bending zone in the delivery module. In addition, this allows a particularly fast positioning of the carrier, which is another important advantage of the invention, since this cycle times can be reduced.

The carrier for the pressing frame is coupled to a carrier movement mechanism arranged on the delivery module, wherein a portion of the carrier carrying the pressing frame can be introduced from the delivery module into the bending zone and moved back to the delivery module. In particular, the pressing frame can be brought by moving the carrier into a position in which it is completely accommodated in the delivery chamber cavity. The carrier may be moved by the carrier moving mechanism so that the pressing frame can reciprocally move laterally within the bending zone between the first pressing frame position and the second pressing frame position. In an advantageous embodiment of the device according to the invention, at least one support device is provided for supporting the press frame and / or the carrier at the first press frame position and / or the second press frame position. In particular, a separate support device can be arranged in each case on the first press frame position and the second press frame position, for example a servomotor or a hydraulic or pneumatic support device, by which the press frame and / or support is supported downwards. In this way, the pressing frame can be positioned very accurately, with changes in position of the pressing frame, which are caused in particular by contact with the contact overlying bending mold, can be advantageously avoided. In a further advantageous embodiment of the device according to the invention, at least one tool which can be connected to the first and / or second bending mold can be transported on the carrier, for example by means of a tool rest attached to the carrier. By moving the carrier between the feed module and a first tool position assigned to the first bending mold and / or a second tool position assigned to the second bending mold, the tool can be moved laterally relative to the first and second bending mold. Preferably, the first tool draw position are in the vertical direction (eg directly) below the first bending mold and the second tool position in the vertical direction (eg directly) below the second bending mold. Preferably, but not necessarily, the first press frame position is identical to the first tool position and the second press frame position is identical to the second tool position. The carrier movement mechanism is configured such that the at least one tool can be moved on the carrier by moving the carrier from the delivery module into the bending zone and from the bending zone to the delivery module. In particular, the carrier can be moved by the carrier movement mechanism such that the at least one tool can be laterally moved in the first tool position or in the second tool position in a reciprocal manner. This embodiment of the invention allows a particularly simple and fast placement of a bending mold with a tool, in particular a tool change, wherein the at least one tool can be transported on the carrier by moving the carrier from the delivery module to the first or second tool position to the first bending mold or Biegeform to equip. On the other hand, the tool can be easily removed from the bending zone by placing it on the carrier.

Advantageously, a first tool connectable to the first bending mold and a second tool connectable to the second bending mold are simultaneously transportable on the support, wherein moving the support the first tool between the bending chamber and the first tool position and the second tool between the bending chamber and the second Tool position relative to the first and second bending mold are laterally movable. For this purpose, it is advantageous if the two tools can be positioned with an intermediate distance on the carrier, which corresponds to an intermediate distance of the first and second tool position. In this way, a tool change can be done on both bending forms in a particularly simple and fast manner. Particularly advantageously, the at least one tool is arranged in a heatable delivery chamber cavity of a delivery module designed as a delivery chamber prior to the placement of a bending mold. In this way, the processing of discs in the bending zone can be continued very quickly during a tool change, without a time-consuming heating of the tool would be required. This is especially true when changing both tools of the bending forms. The delivery chamber is provided for this purpose with a heatable Zustellkammerhohlraum in which the at least one tool can be heated. In the case of a heatable delivery chamber cavity, it is particularly advantageous if the carrier movement mechanism is arranged at least partially outside the heatable (hot) delivery chamber cavity. In this way, an undesirable heating of components of the carrier movement mechanism and associated thermally induced changes in length can be avoided in an advantageous manner. This contributes significantly to position the carrier and in particular the press frame mounted thereon with a particularly high accuracy and high speed, so that discs with particularly high quality requirements can be produced.

In addition to a particularly accurate positioning of the pressing frame, the movable delivery module allows a simple and fast placement of the bending forms of the bending zone with preferably heated tools. For example, a plurality of movable delivery modules can be provided, which are provided with mutually different tools in order to equip the bending zone, as needed, with different tools can. Likewise, maintenance or replacement of tools of the bending forms is more easily possible. In this case, only one delivery module is delivered to the bending zone.

The delivery module, preferably delivery chamber, is a self-contained unit which allows the delivery module to be equipped with tool (s) and / or pressing frame as well as an exchange of tool (s) and / or pressing frame in the delivery module independently of the bending zone. In particular, the movability of the carrier to the outside allows a simple and fast placement of the delivery module.

If the delivery module, preferably the delivery chamber, is movable, the delivery module can be delivered to the bending zone, preferably the bending chamber, and removed again. That creates in particular free access to the bending zone to perform maintenance or adjustments for a particular bending process.

Advantageously, the device according to the invention also has a preheating zone with a heating device for heating slices to a bending temperature, and a transport mechanism, in particular of the roller bed type, for transporting slices from the preheating zone to the bending zone, in particular to a removal position (eg directly) below the first bending form. The roller bed is advantageously designed so that individual slices can be transported one after the other to the removal position. The removal position can in particular correspond to an end section of the roll bed.

Advantageously, the device according to the invention furthermore has a thermal pretensioning zone with a cooling device for thermal pretensioning of a disk, wherein a pretensioning frame (for example pretensioning ring) for transporting a disk from a first pretensioning frame position assigned to the second bending mold, which may be identical in particular to the second press frame position, to a second biasing frame position for biasing a disk in the biasing zone relative to the second bending mold in a reciprocal manner laterally (ie, with at least one horizontal movement component). Advantageously, the biasing frame in the horizontal plane reciprocally and translationally (1 -dimen- sional) movable. By thermal tempering (tempering) is selectively created a temperature difference between a surface zone and a core zone of the disc to increase the breaking strength of the disc. The bias of the disc is advantageously generated by means of a device for blowing the disc with a gaseous fluid, preferably air. Preferably, the two surfaces of a disc are simultaneously subjected to a cooling air flow.

In the lateral displacement of pressing frame and biasing frame, a single disc is transported in each case, wherein two discs can be processed simultaneously on the two bending molds, while a third disc is located in the biasing zone. Due to the preferably reciprocal translational movement of the pressing frame and / or biasing frame, the individual slices can be transported effectively and quickly between the various tools. By means of a bending of a disk in the peripheral and internal region, which is carried out in several stages, the bending time at the second bending mold can be considerably reduced in order to shorten the cycle times. In addition, it is also possible to produce disks of complex geometry with high quality. Advantageously, the biasing frame for transporting a disc from the bending zone to the prestressing zone on a suitably designed for Randendbiegung in the edge region of the disc frame surface. In addition, it is advantageous if the pretensioning frame is suitably designed for an area-end bending by gravity in the inner area of the pane. During transport of a disk on the leader frame, edge end deflection and surface deflection may be by gravity.

According to one embodiment of the invention, the preheating zone is designed in the form of a preheating chamber which has a preheating chamber cavity which is completely bounded by a preferably insulated wall. Through the wall of the Vorwärmkammerlohlraum is separated from the external environment. For example, the preheating chamber cavity is closed or closable and has at least one opening opening into the preheating chamber cavity, which opening is preferably closable by a preheating chamber door. The preheat chamber cavity is connectable to the flexure zone, particularly the flexure chamber cavity of a flexure zone formed as a flexure chamber, for feeding curved disks to the second biasing frame position. Preferably, but not necessarily, the second press frame position is identical to the first bias frame position. The biasing frame is coupled to a biasing frame movement mechanism by which the biasing frame between the first biasing frame position and the second biasing frame position can be moved in a reciprocal manner laterally of the first and second bending molds. The biasing frame moving mechanism is not coupled to the carrier for the press frame. The device according to the invention for bending disks serves, in particular, for carrying out the method according to the invention which is described below. In this respect, reference is made in the description of the method according to the invention to the above statements on the device according to the invention. The method comprises the following (e.g., successive) steps:

A step of providing a wafer heated at the bending temperature in a picking position associated with the first bending mold. Another step in which the disc is fixed to a contact surface of the first bending mold. Advantageously, a fixing of the disc takes place at the contact surface of the first bending mold in that the disc is lifted by blowing with a gaseous fluid and pressed against the contact surface of the first bending mold. Alternatively and preferably additionally, the disk is fixed by suction on the contact surface of the first bending mold. For example, but not necessarily, the disc is subjected at the contact surface of the first bending form of a Randvorbiegung in the edge region and / or a Flächenvorbiegung in the interior of the disc. A step of positioning a press frame for the disk in a first press frame position associated with the first bending mold, particularly while the disk is fixed to the first bending mold.

A step in which the disc is placed on the press frame. If the pressing frame is formed as a pressing frame, the method may include a further step in which the disc is pressed between the first bending mold and the pressing frame, wherein a Randvorbgung or Randendbiegung takes place in the edge region of the disc.

A step in which the disk is transported on the press frame to a second press frame position associated with the second bending mold. During the transport of the disc on the pressing frame, a surface pre-bending preferably takes place in an inner region of the disc surrounded by the edge region by gravity. This is particularly advantageous if the disc has been pressed between the first bending mold and the pressing frame designed as a press frame. If the press frame is designed as a press frame, the method may comprise a further step in which the pane is pressed between the second bending mold and the press frame, whereby a edge pre-bending or edge end bend takes place in the edge region of the pane.

A step in which the disc is fixed to a contact surface of the second bending mold. In this case, for example, a Flächenvorbiegung or a Flächenendbiegung in the interior and a Randvorbiegung or Randendbiegung done in the edge region of the disc. Advantageously, the disc is fixed by suction on the contact surface of the second bending mold. It is essential here that the pressing frame is fastened on a carrier introduced by a feed module (preferably in a feed chamber) into the bending zone (preferably bending chamber), wherein the pressing frame is moved by moving the carrier between the first press frame position and the second press frame position relative to the first and second Bending form is moved laterally. Preferably, the delivery module is movable and is delivered to the bending zone.

In an advantageous embodiment of the invention, the pressing frame and / or the carrier in the first press frame position and / or the second Pressrahmenposi- tion are supported downwards.

In a further advantageous embodiment of the method according to the invention, at least one tool connectable to the first bending mold and / or the second bending mold is transported on the carrier between the delivery module and the bending zone. Particularly advantageously, the at least one tool is heated in the delivery module before being transported into the bending zone.

In an advantageous embodiment of the method according to the invention, the method comprises a further step, in which the disc is transported on a (cool) biasing frame to a cooling device for thermally biasing the disc. During transport on the pretensioner frame, a surface end bend in the interior of the disk can be done by gravity.

Advantageously, while the disk is fixed to the second bending mold, the biasing frame is biased to bias the disk in a first biasing frame position associated with the second bending mold, the disk is deposited onto the biasing frame, and the biasing frame is between the first biasing frame position and a second biasing frame position Biasing the disc laterally moved to the second bending mold. Preferably, the biasing frame is reciprocally (bidirectionally) translationally (1-dimensionally) moved in a horizontal plane between the first header frame position and the second header frame position.

In an advantageous embodiment of the method according to the invention is carried out by pressing the disc between the first bending mold and the pressing frame a Randvorbiegung in the edge region of the disc. Subsequently, by pressing the disc between the second bending mold and the pressing frame a further edge pre-bending in the edge region of the disc. Finally, there is a marginal end bend of the disc during transport of the disc on the biasing frame. In a further advantageous embodiment of the method according to the invention is carried out by pressing the disc between the first bending mold and the pressing frame a Randvorbiegung in the edge region of the disc. Subsequently, by pressing the disc between the second bending mold and the pressing frame, a marginal end bending takes place in the edge region of the disk.

In a further advantageous embodiment of the method according to the invention is carried out by pressing the disc between the first bending mold and the pressing frame a Randendbiegung in the edge region of the disc. The bend on the second bending mold can give the disk a final or quasi-final shape. Typically, but not necessarily, the shape of the disk on the leader frame will still (usually slightly) change, for which purpose the biasing frame preferably has a frame surface adapted for edge end flexure. In addition, the biasing frame is suitably designed for a surface end deflection by gravity. The disc thus receives on the leader frame its final shape.

Furthermore, the invention extends to the use of the device according to the invention and of the method according to the invention for the production of windows for vehicles for locomotion on land, in the air or on water, in particular in motor vehicles, and in particular for rear windows in motor vehicles.

The various embodiments of the invention may be implemented individually or in any combination. In particular, the features mentioned above and those to be explained below can be used not only in the specified combinations but also in other combinations or alone, without departing from the scope of the present invention. The invention will now be explained in more detail by means of embodiments, reference being made to the accompanying figures. In a simplified, not to scale representation:

Fig. 1 is a schematic representation of an exemplary embodiment

the device according to the invention for bending discs in cross section;

Fig. 2-3 further schematic representations of the device of Fig. 1 in

various phases of the process according to the invention;

Fig. 4-10, the inventive device for bending discs of

Fig. 1 without delivery module at different times;

1 1A-1 1B are schematic representations to illustrate the Verpes- solution of a disc between the first bending tool and the pressing frame.

12 is a flowchart of the inventive method for

Making a slice.

First, FIGS. 1 and 4 are considered, wherein an exemplary embodiment of the device according to the invention is illustrated in a cross-sectional view on the basis of schematic representations. With reference to FIG. 1, essential components of the apparatus for bending disks generally designated by the reference numeral 1 will be described. FIG. 4 shows an enlarged detail of the device 1 for bending disks of FIG. 1 without a delivery module 38.

The device 1 comprises a bending zone, which is designed here for example as a closed or closable bending chamber 2 for bending (glass) disks 5, a preheating zone 3 arranged laterally of the bending chamber 2 with a heating device for heating the disks 5 to the bending temperature, which does not is shown in more detail, since it is located in the illustrations shown behind the bending chamber 2, as well as a side of the bending chamber 2 arranged biasing zone 4 for cooling or pre- clamping the curved disks 5. The pretensioning zone 4 is coupled on the right side to the bending chamber 2. The preheating zone 3 and the prestressing zone 4 are arranged at an angle of 90 ° to the bending chamber 2 in top view and functionally coupled thereto. The preheating zone 3, the bending chamber 2 and the prestressing zone 4 are each designed here as spatially separated regions of the device. The bending chamber 2 is provided with an insulating bending chamber wall 36, which defines a cavity of the bending chamber 2, hereinafter referred to as bending chamber cavity 37, from the external environment. As a result, the bending chamber cavity 38 can be heated and maintained at a temperature (bending temperature) suitable for the bending operation of the disks 5. For heating the bending chamber cavity 37, the bending chamber 2 has a heating device, which is not shown in detail in FIG.

In the device 1, the discs 5 can be successively transported from the preheating zone 3 into the bending chamber 2 and finally into the pretensioning zone 4. For transporting the disks 5 from the preheating zone 3 into the bending chamber 2, a disk transport mechanism 6 is provided, which here comprises, for example, a roller bed 7 with cylindrical rollers 8 for the flat support of disks 5. The rollers 8 are actively and / or passively rotatably mounted with their horizontally aligned axes of rotation, here for example parallel to the x-direction. By means of the rollers 8, in the preheating zone 3, slices 5 heated to the bending temperature can be individually and sequentially brought into a removal position 22 in the bending chamber cavity 37 of the bending chamber 2. The transport direction for the disc 5 is perpendicular to the plane of the drawing.

The bending chamber 2 has in the bending chamber cavity 37 two spatially separate bending stations 9, 9 ', wherein a first bending station 9 and a second bending station 9' are arranged offset in the horizontal x-direction. In the description of the two bending stations 9, 9 ', the reference numerals each refer to a component of the second bending station 9', wherein components of the second bending station can not have any, if this appears appropriate. For ease of reference, all components of the second bending station 9 'are also referred to as "second" components ", unlike the components of the first bending station 9, which are also referred to as" first "components.

The bending stations 9, 9 'each have a vertical support 10, 10' for releasable attachment of a bending tool 1 1, 1 1 '. The brackets 10, 10 'are by a Retainer movement mechanism 13, 13 ', not shown, each displaceable in the vertical direction. Optionally, the holders 10, 10 'are laterally displaceable by the holder movement mechanism 13, 13', in each case also with at least one horizontal movement component, in particular in the positive or negative x direction. At the lower end of the brackets 10, 10 'is in each case the bending tool 1 1, 1 1' detachably mounted. Each bending tool 1 1, 1 1 'has a downwardly directed, convex contact surface 14, 14' for the planar contact of a disc 5. With a corresponding contact pressure, the disc 5 can be bent at the respective contact surface 14, 14 '. The two contact surfaces 14, 14 'have for this purpose in each case an end or marginal outer surface portion 15, 15' and an inner surface portion 16, 16 'with mutually different surface contours (surface shapes), wherein the inner surface portion 16, 16' of outer surface portion 15, 15 'completely surrounded (edged) is. In addition to the mutually different surface contours of outer surface portion 15, 15 'and inner surface portion 16, 16' of a same bending tool 1 1, 1 1 'and the contact surfaces 14, 14' of the two bending tools 1 1, 1 1 'have different surface contours. Specifically, the outer surface portion 15 of the contact surface 14 of the first bending tool 1 1 has a surface contour which is adapted to a desired Randendbiegung, ie final bend, in a (eg strip-shaped) edge region 17 of the disc 5 or such a final bend in the other Processing allows. The terminal edge region 17 of the disc 5 is adjacent to a perpendicular to the two opposite disc major surfaces arranged slices (cut) edge 19 at. The inner surface section 16 of the contact surface 14 of the first bending tool 1 1 has a surface contour which corresponds to a surface pre-bending, ie non-final bending, in an inner region 18 of the pane 5 which is completely surrounded by the edge region 17. The outer surface portion 15 'of the contact surface 14' of the second bending tool 1 1 'has a same surface contour as the outer surface portion 15 of the contact surface 14 of the first bending tool 1 1 and has a surface contour adapted to the desired Randendbiegung in the edge region 17 of the disc 5 is. In contrast to the inner surface portion 16 of the contact surface 14 of the first bending tool 1 1, the inner surface portion 16 'of the contact surface 14' of the second bending tool 1 1 'on a surface contour, which at a Flächenendbiegung, ie a final or quasi-final bending, in Inside- Area 18 of the disc 5 is adapted or this allows in the further processing. The first holder 10 forms, together with the first bending tool 1 1, a first bending mold 12. In a corresponding manner, the second holder 10 'together with the second bending tool 1 1' forms a second bending mold 12 '.

The two bending stations 9, 9 'are each provided with a suction device 20, 20' for sucking a disk 5 against the contact surface 14, 14 '. The contact surfaces 14, 14 'can be provided for this purpose, for example with evenly distributed suction holes (not shown) and / or a marginal apron. Through a vacuum or vacuum generated, a disk 5 can be pulled against the contact surface 14, 14 '.

The first bending station 9 further has a blowing device 21, not shown, through which a flowing gaseous fluid, for example an air flow 33, can be generated in the vertical direction through the roller bed 7. As a result, a disc 5 located in the removal position 22 can be raised in the direction of the first bending mold 12. The removal position 22 is located in the vertical direction directly below the bending tool 1 1 of the first bending mold 12. The device 1 further comprises a movable (mobile) feed chamber 38, which is arranged opposite to the biasing zone 4 on the outside of the bending chamber 2. Like the bending chamber 2, the feed chamber 38 is formed in the form of a closed or closable chamber. For this purpose, the delivery chamber 38 comprises an insulating delivery chamber wall 39, which delimits a cavity of the delivery chamber 38, referred to below as a delivery chamber hollow space 40, from the external environment. The delivery chamber cavity 40 is accessible from the outside by at least one delivery chamber opening 43 opening into the delivery chamber cavity 40. The Zustellkammeröffnung 43 is closed by a Zustellkammertür 44, so that the Zustellkammerhohlraum 40 can be opened and closed to the outside environment. As shown in FIG. 1, the feed chamber 38 is arranged on the outside of the bending chamber 2, wherein the feed chamber opening 43 is in a counterposition position to a first bending chamber opening 45 of the bending chamber hollow space 37. The bending chamber cavity 37 is accessible from the outside through the opening into the bending chamber cavity 37 first bending chamber opening 45. The first bending chamber opening 45 can be closed by a first bending chamber door 46. If the delivery chamber 38 is arranged on the bending chamber 2, by opening both the delivery chamber door 44 and the first bending chamber door 46, the bending chamber cavity 37 and the delivery chamber cavity 40 can be spatially interconnected. On the other hand, by closing the feed chamber door 44 and / or the first bending chamber door 46, the delivery chamber cavity 40 can be spatially separated from the bending chamber cavity 37.

The feed chamber 38 is movable relative to the bending chamber 2 and for this purpose has an actively or passively driven Zustellkammerbewegungsmechanis- mechanism 42 for moving the Zustellkammer 38, which can be acted upon in the present embodiment by pressurized air cushion platforms 47 for generating air cushion below the feed chamber 38 on which the delivery chamber 38 can float, is formed. However, it would also be conceivable to design the feed chamber movement mechanism 42 in the form of a roller bearing, for example. By means of the Zustellkammerbewegungsmechanismus 42, the feed chamber 38 of the bending chamber 2 can be delivered or removed from the bending chamber 2.

The Zustellkammerhohlraum 40 is bounded by an insulating Zufellkammerwandung 39. Thereby, the Zustellkammerhohlraum 40 can be heated and maintained to a desired temperature. For example, the delivery chamber cavity 40, like the bending chamber 2, is heated and maintained at a temperature (bending temperature) suitable for the bending operation of the disks 5. For heating the delivery chamber cavity 40, the delivery chamber 38 has a Zustellkammerheizeinrichtung 41, which is formed in the embodiment of Figure 1 in the form of radiant heaters. The radiant heaters are distributed in several radiant heater fields.

The delivery chamber 38 also has an elongate carrier 27 for a press frame 25. The carrier 27 is movable by a carrier moving mechanism 26. The carriage movement mechanism 26 includes a carriage 48 to which the carrier 27 is attached, the carriage 48 being movable along an elongate carriage guide 49 that is fully received within the delivery chamber cavity 40. The carrier movement mechanism 26 further comprises a drive device 50 which can reciprocate and translate the carriage 48 together with the carrier 27 along the carriage guide 49. As shown in Figure 1, the carriage guide 49 extends toward the bending chamber 2, with a portion of the carrier When the delivery chamber door 44 is open and the bending chamber door 46 is open, it can be introduced into the bending chamber cavity 37 by the carriage 48 being moved along the carriage guide 49 in the direction of the bending chamber 2. On the other hand, by moving the carriage 48 in opposite directions, the carrier 27 can be removed from the bending chamber cavity 37 and completely received in the delivery chamber cavity 40. The drive device 50 for the carrier 27 is arranged outside the heatable delivery chamber cavity 40 (in FIG. 1 below the delivery chamber cavity 40). The drive device 50 can in principle be designed in any desired way, as long as an accurate positioning of the carrier 27 is made possible. In the exemplary embodiment shown, the drive device 50 is designed in the form of a sprocket-chain mechanism equipped with a driven pinion, which is known to the person skilled in the art and need not be explained in more detail. In the situation shown in Figure 1, the carrier 27 is inserted into the bending chamber 2 and thus located partially in the Zustellkammerhohlraum 40 and partially in the bending chamber cavity 37. The Zustellkammertür 44 and the bending chamber door 46 are each in an open position. It is understood that the feed chamber 38 and the bending chamber 2, including their components, are designed such that a portion of the carrier 27 carrying the press frame 25 can be introduced from the feed chamber cavity 40 into the bending chamber cavity 37. The pressing frame 25, which serves to transport a disc 5, is fixedly attached to the free end of the carrier 27. For this purpose, the support 27 comprises, for example, two parallel support arms 52, between which the press frame 25 is fastened. When the carrier 27 is inserted (partially) into the bending chamber cavity 37, by moving the carrier 27, the pressing frame 25 can be laterally moved within the bending chamber cavity 37 (reciprocal and translational) relative to the first and second bending molds 12, 12 '. In particular, the pressing frame 25 can be moved by moving the carrier 27 between a first press frame position 23 associated with the first bending mold 12 and a second press frame position 24 assigned to the second bending mold 12 '. Preferably, the first pressing frame position 23 in the vertical direction (eg directly) below the first bending mold 12 and the second pressing frame position 24 in the vertical direction (eg directly) below the second bending mold 12 '. FIG. 1 shows a situation in which the transort frame 25 is located in the first press frame position 23. In the second press frame position 24 is a biasing frame 30. The second press frame position 24 is here identical to a first Vorspannrah- The biasing frame 30 is translationally and reciprocally movable by means of a biasing frame movement mechanism 31 between the first biasing frame position 24 and a second biasing frame position 32 within the biasing zone 4. In the device 1 according to the invention a movement of the pressing frame 25 takes place within the bending chamber 2 by the supplied from outside the bending chamber 2 carrier 27, the drive means 50 is arranged for the carrier 27 outside of the heatable Zustellkammerlohls 40, so that in a particularly advantageous manner a very accurate positioning of the pressing frame 25 is made possible.

As shown in FIG. 1, in each of the first press frame position 23 and the second press frame position 24, support means 51, 51 'for supporting the carrier 27 are arranged downward. The support means 51, 51 'is formed here, for example, in each case as a hydraulic or pneumatic support means. In this way, the pressing frame 25 can be positioned very precisely in the first press frame position 23 or in the second press frame position 24 without change in position, in particular by physical contact with the first bending mold 12 or second bending mold 12 'in order to further improve the accuracy of the disk processing. FIG. 1 shows a situation in which the pressing frame 25 or carrier 27 is supported in the first pressing frame position 23 by the supporting device 51.

Reference is now made to Figure 2, wherein the device 1 for bending discs 5 is shown in a different process situation than in Figure 1. In order to avoid unnecessary repetition, only the differences from FIG. 1 are explained, and otherwise reference is made to the above statements. In the situation of FIG. 2, the biasing frame 30 has been moved from the first biasing frame position 24 to the second biasing frame position 32 within the biasing zone 4. The press frame 25 was moved from the first press frame position 23 by moving the carrier 27 to the second press frame position 24. In the second press frame position 24, the press frame 25 or support 27 is supported downwardly by the second support 51 '.

Reference is now made to FIG. 3, wherein the device 1 for bending disks 5 is shown in a different process situation than in FIG. In order to avoid unnecessary repetition, only the differences from FIG. 1 are explained again, and otherwise reference is made to the above statements. In the situation of Figure 3, the carrier became 27 by moving the carriage 48 on the carriage guide 49 completely back into the Zustellkammerhohlraum 40 back. On the carrier 27, the two tools 1 1, 1 1 'of the first and second bending mold 12, 12' are stored. For example, the tool 1 1 of the first bending mold 12 is placed on a (not shown) tool rest 53 on the carrier 27. The other tool 1 1 'of the second bending mold 12' is deposited, for example, on the pressing frame 25, which serves as a tool rest 53 '. For this purpose, the carrier 27 was moved so that the tool 1 1 on the first tool rest 53 and the tool 1 1 'on the second tool rest 53' could be stored. In this case, the first tool rest 53 has been brought into a first tool position which is identical to the first press frame position 23. In a corresponding manner, the second tool rest 53 'has been brought into a second tool position which is identical to the second press frame position 24. The first tool rest 53 and the second tool rest 53 'are arranged for this purpose with an intermediate distance on the carrier 27, which corresponds to the spacing between the first press frame position 23 and the second press frame position 24. To store the two tools 1 1, 1 1 ', the two bending molds 12, 12' were each moved in the vertical direction down. Subsequently, the carrier 27 with the applied tools 1 1, 1 1 'was completely moved into the Zustellkammerhohlraum 40. The possibility of transporting the two tools 1 1, 1 1 'by the carrier 27 allows a simple and quick change of tools on the two bending molds 12, 12'. In a particularly advantageous manner, tools can be heated in the feed chamber cavity 40 prior to equipping the two bending molds 12, 12 ', whereby time-consuming heating in the bending chamber cavity 37 can be avoided. In addition, easy maintenance of tools is possible. The Zustellkammerhohlraum 40 can be closed by closing the Zustellkammertür 44 to the outside environment, which allows rapid heating of tools in Zustellkammerhohlraum 40. Particularly advantageously, the bending chamber cavity 37 of the bending chamber 2 can also be closed by closing the first bending chamber door 46. By closing the bending chamber 2, a delivery module can be easily removed from the bending chamber 2 without exposing the bending chamber cavity 37 to the external environment, in which case a greater temperature drop in the bending chamber cavity can be avoided in particular. Accordingly, another delivery module can be coupled in a simple manner to the bending chamber 2. When the feed chamber cavity 40 is closed, the tools received in the feed chamber cavity 40 can be heated efficiently and quickly. This way is a allows quick change of Zustellmodulen to the bending chamber, in particular to different tools on the bending molds 12, 12 'quickly and inexpensively used. In the device 1, the pressing frame 25 is used for pressing and transporting a disk 5. The pressing frame 25 has for this purpose a marginal (eg strip-shaped) pressing surface 28 (see Figures 1 1A and 1 1 B), the surface contour complementary to the surface contour the outer surface portions 14, 14 'of the bending tools 1 1, 1 1' of the first bending mold 12 and the second bending mold 12 'is. The upwardly facing pressing surface 28 is suitable for pressing a resting disc 5 in the edge region 17. The pressing frame 25 is not formed over the entire surface, but has an internal opening, which additionally allows a surface pre-bending of the inner region 18 of a disc 5 deposited thereon by gravity. The pretensioning zone 4, which is coupled laterally to the bending chamber 2, has two so-called pretensioning boxes 29, which are arranged offset from one another in the vertical direction. By means of the two prestressing boxes 29, an air flow for air cooling of a disk 5 located between the two biasing boxes 29 can be generated in each case in order to bias the bent disk 5. The biasing frame 30 is for transporting and supporting during the biasing of a bent disc 5. The biasing frame 30 can be offset laterally by at least one horizontal movement component relative to the bending station 2 by a biasing frame moving mechanism 31, which is not shown in detail. Specifically, the biasing frame 30 may be translationally reciprocated in a horizontal plane between the first biasing frame position 24 and the second biasing frame position 32 located between both biasing boxes 29 of the biasing zone 4. The bending chamber cavity 37 is accessible from the outside through a second bending chamber opening 54 which opens into the bending chamber cavity 37. The second bending chamber opening 54 can be closed by a second bending chamber door 35 so that the bending chamber cavity 37 can be opened to the outside and sealed against the outside environment. The biasing frame 35 can be transported through the opened second bending chamber opening 54 into the bending chamber cavity 37 to receive a finished bent disk 5 and to transport it into the pretensioning zone 4. From there, the disk 5 can be easily removed and further processed. Reference is now made to FIGS. 4 to 10, which respectively show the apparatus 1 for bending disks 5 of FIG. 1 at various successive times during a bending process to describe an exemplary method of bending disks 5. For better clarity, only selected components of the device 1 are provided with reference numbers. In addition, the device 1 is shown without delivery module 38.

FIG. 4 illustrates a situation during the bending process in which a disk 5 has been moved into the removal position 22 of the first bending station 9. The first bending mold 12 is located in an elevated position above the disc 5. The second bending mold 12 'is located approximately at the same height as the first bending mold 12. Below the second bending mold 12' is the pressing frame 25 in the second Press frame position 24 of second bending station 9 'with a further disc 5 deposited thereon. The pretensioning frame 30 is located in the second prestressing frame position 32 of the pretensioning zone 4 between the two prestressing boxes 29.

Figure 5 shows the device 1 for bending discs 5 at a later time than in Fig. 1. The first bending mold 12 is moved in the direction of the disc 5 from the elevated position to a first lowered position down. The disc 5 has been raised by blowing on it with the Blaseinnchtungsluftstrom 33 (symbolically represented by arrows) on its underside in the vertical direction from the removal position 22 toward the first bending mold 12 and is by the Blaseinnchtungsluftstrom 33 against the contact surface 14 of the first bending tool 1 1 pressed. In the first lowered position of the first bending mold 12, the contact surface 14 is lowered so far that the disk 5 can be pressed by the Blaseinnustungsluftstrom 33 against the contact surface 14. In addition, a fixing of the disc 5 takes place at the contact surface 14 by suction by means of the suction device 20. The suction device air flow 34 producing a negative pressure at the contact surface 14 is likewise represented symbolically by arrows. Due to the typically incomplete abutment against the contact surface 14, only a pre-bending of the disk 5 in the edge region 17 takes place. As a rule, the pressing pressure through the Blaseinnchtungsluftstrom 33 is not sufficient to produce a Randendbiegung in the edge region 17 of the disc 5. On the other hand, the suction effect of the suction device 20 is used in Essentially only for holding the disc 5 at the contact surface 14 until the pressing frame 25 is moved under the disc 5, and has only a small influence on the bending of the disc 5. Nevertheless, thereby bubbles in the disc 5 can be removed. In the inner region 18 of the disk 5, only one surface pre-bending is possible anyway by the contact surface 14. FIG. 2 shows a situation in which the disk 5 is already fixed to the contact surface 14.

The second bending mold 12 'has been brought from the elevated position to a lowered position in which there is a flat contact between the contact surface 14' and the disc 5 deposited on the pressing frame 25. Here, the disc 5 is pressed in the edge region 17 between the outer surface portion 15 'of the contact surface 14' of the bending tool 1 1 'and the pressing surface 28 of the pressing frame 25 (see Figures 8A and 8B). The pressing surface 28 has a complementary shape to the outer surface portion 15 'of the contact surface 14. The edge region 17 of the disk 5 is thereby preferably finished bent, i. gets its edge bend. However, it is also possible that the edge region 17 of the disc 5 is merely pre-bent. Subsequently, a definition of the disc 5 at the contact surface 14 'by suction by means of the suction device 20'. It is conceivable that the contact surface 14 'alternatively has a small distance from the disc 5, when suction of the disc 5 over a certain distance away is possible. The suction device air flow 34 ', which generates a negative pressure at the contact surface 14', is represented symbolically by arrows. In contrast to the first bending mold 12 where only holding the disc 5 is intended and the negative pressure therefore causes (at least notable) bending of the disc 5, the suction of the disc 5 against the contact surface 14 'also serve to bend the disc 5, i. by the suction sufficient mechanical pressure is generated to bend the disc 5 in the desired manner. Thus, the disc 5 is pre-bent on the second contact surface 14 'in the inner region 18 of the disc 5. In addition, a previously generated edge end bend in the edge region 17 can be maintained on the pane 5. The biasing frame 30 is still located in the biasing device 4 between the two biasing boxes 29th

FIG. 6 shows the device 1 for bending disks 5 at a later point in time than in FIG. 5. The first bending mold 12 is moved upwards again to its raised position, the disk 5 being fixed to the contact surface 14 by the suction device air flow 34 , The second bending mold 12 'is also in its elevated position above, wherein the disc 5 is fixed to the contact surface 14 'by the suction device air flow 34'. The pressing frame 25 is disc-free and is located below the second bending mold 12 '. The biasing frame 30 is still located in the biasing device 4 between the two biasing boxes 29th

Figure 7 shows the device 1 for bending discs 5 at a later time than in Figure 6. The first bending mold 12 is shown in a situation in which it is moved on the way down to a second lowered position above the first lowered position , The disc 5 is still fixed to the contact surface 14 by the Saugeinrichtungsluftstrom 34. The pressing frame 25 is moved by means of the carrier movement mechanism 26 on the carrier 27 in the horizontal direction (negative x direction) in translation from the second pressing frame position 24 to the first pressing frame position 23 and is located below the first bending mold 12. The second bending mold 12 'is located further in its raised position, the disc being fixed to the contact surface 14 'by the sucker airflow 34'. The biasing frame 30 is moved from the biasing position 32 to the second press frame position 24 of the second bending station 9 'and is located below the second bending mold 12'. FIG. 8 shows the device 1 for bending disks 5 at a later time than in FIG. 7. The first bending mold 12 has now been moved to the second lowered position, with the disk 5 coming into contact with the pressing frame 25. Here, the disc 5 is pressed in the edge region 17 between the outer surface portion 15 of the contact surface 14 of the bending tool 1 1 and the pressing surface 28 of the pressing frame 25 (see Figures 1 1A and 1 1 B). The pressing surface 28 has a complementary shape to the outer surface portion 15 of the contact surface 14. The edge portion 17 of the disc 5 is thereby pre-bent or finished bent. A great advantage of the pressure of the disc 5 against the pressing frame 25 is a very precise definition of the position of the disc 5 on the pressing frame 5 with an exact contact of the edge portion 17 of the disc 5 on the pressing surface 28 of the pressing frame 25. This allows an accurate Positional fixing of the disc 5 on the press frame 25 through the disc 5 fitting stopper, which is not shown in detail. As a result, a particularly high production accuracy and good optical quality of the bent disc can be achieved. The second bending mold 12 'is moved to its lowered position, wherein the disk 5 is deposited on the biasing frame 30. FIG. 9 shows the device 1 for bending disks 5 at a later time than in FIG. 8. The first bending mold 12 and the second bending mold 12 'have each been moved back into their raised position. The pressing frame 25 is translationally moved in the horizontal direction (positive x-direction) from the first press frame position 23 to the second press frame position 24 and is located below the second bending mold 12 '. In particular, during transport, the disk 5 located on the pressing frame 25 is pre-bent in the inner region 18 by gravity. Due to the compression in the edge region 17, the surface pre-bending is restricted by gravity in the inner region 18. The biasing frame 30 with the disc 5 deposited thereon has been moved from the second press frame position 24 of the second bending station 9 'in the biasing position 32 and is located between the two biasing boxes 29. In order to allow exit from the bending zone 2, the door 35 for open a short period of time. As a result, a significant loss of temperature in the bending zone 2 can be avoided. During transport on the biasing frame 30, a marginal end bending and a surface end bending of the disc 5 can be done by gravity. The biasing frame 30 has for this purpose an upwardly directed frame surface 55 for contact with the disc 5, which is adapted for a Randendbiegung. In addition, the biasing frame 30 is suitably adapted for a surface end bending by gravity.

FIG. 10 shows the device 1 for bending disks 5 at a later point in time than in FIG. 9. The first bending mold 12 and the second bending mold 12 'are furthermore in an elevated position. In the removal position 22 of the first bending station 9, a new disc 5 was spent. The disk 5 located on the press frame 25 can be pressed and sucked by the second bending mold 12 '. The disk 5 located in the biasing zone 32 is cooled by a stream of air for biasing, as illustrated by arrows. The situation of FIG. 10 thus resembles the situation of FIG. 1. The bending process can be continued in this way continuously.

In FIGS. 11A and 11B, the compression of the disc 5 between the pressing frame 25 and the contact surface 14 of the first bending tool 11 is shown. Visible, the contact surface 14 has an outer surface portion 15 and an inner surface portion 16 with different surface contours. The outer surface section 15 has a surface contour which corresponds to the desired edge end bend in the Edge region 17 of the disc 5 corresponds or allows such. The inner surface portion 16 has a surface contour, which corresponds to a surface pre-bending in the inner region 18 of the disk 5 or such allows. The pressing surface 28 of the pressing frame 25 has a surface contour which is complementary to the surface contour of the outer surface portion 15 of the contact surface 14. FIG. 1A shows a situation in which the inner region 18 of the disk 5 comes into abutment against the inner surface section 16 (initial contact). This can already be understood as pressing. In FIG. 11B, the pane 5 has also come to lie completely against the outer surface section 15 of the contact surface 14 in the edge region 17, the desired edge end bending being produced in the edge region 17.

In FIG. 12, the successive steps of the method for producing the pane 5 by means of the apparatus 1 are illustrated by means of a flow chart. In this case, in a first step I, a disc 5 heated to the bending temperature is provided in the removal position 22. In a second step II, the disc 5 is fixed against the contact surface 14 of the first bending mold 12. In a third step III, the pressing frame 25 for the disc 5 is positioned in the first pressing frame position 23. In a fourth step IV, the disc 5 is placed on the pressing frame 25. In a fifth step V, the disk 5 is transported on the press frame 25 to the second Pressrahmenposition 24. In a sixth step VI, the disc 5 is fixed against the contact surface 14 'of the second bending mold 12'.

In an exemplary embodiment of the method according to the invention is carried out by pressing the disc 5 between the first bending mold 12 and the pressing frame 25, a Randvorbiegung in the edge region of the disc 5 and by pressing the disc 5 between the second bending mold 12 'and the pressing frame 25 a Randvorbiegung in the edge region 17th the disc 5, wherein a Randendbiegung occurs during transport on the biasing frame 30. During transport on the pressing frame 25, a surface pre-bending takes place in the inner region of the disk 5 by gravity. During the transport on the pretensioning frame 30, a surface end bending takes place in the inner region of the disk 5 by gravity. The disc thus receives its final shape only on the leader frame. In a further exemplary embodiment of the method according to the invention is carried out by pressing the disc 5 between the first bending mold 12 and the pressing frame 25 a Randvorbiegung in the edge region 17 of the disc 5 and by pressing the disc 5 between the second bending mold 12 'and the pressing frame 25 a 5 Randendbiegung In the edge region 17 of the disc 5. During transport on the biasing frame 30, a further edge end bending takes place only in the sense that the already existing Randendbiegung is not lost, ie the Randendbiegung is maintained. During transport on the pressing frame 25, a surface pre-bending takes place in the interior of the pane 5 by gravity. During Transit) ports on the biasing frame 30 is a Flächenendbiegung in the interior of the disc 5 by gravity. The disc 5 thus receives in the edge region 17 already by the second bending mold 12 'their final shape. In the interior, the disc 5 is only on the biasing frame 30 its final shape.

In a further exemplary embodiment of the method according to the invention by pressing the disc 5 between the first bending mold 12 and the pressing frame 25 is a Randendbiegung in the edge region 17 of the disc 5. During transport on the pressing frame 25 and biasing frame 30 is carried out a further Randendbiegung only in the Sense that the already existing Randendbiegung not

20 is lost, i. the marginal bend is maintained. During transport on the pressing frame 25, a surface pre-bending takes place in the inner region of the disk 5 by gravity. During transport on the biasing frame 30, a surface end bend in the interior of the disc 5 by gravity takes place. The disc 5 thus receives in the edge region 17 already by the first bending mold 12 its final shape.

25 In the interior, the disc 5 receives its final shape only on the biasing frame 30.

In all embodiments of the method, edge pre-bending and / or surface pre-bending can take place by fixing the pane 5 to the first bending mold 12 or second bending mold 12 '. In addition, by setting the disc 5 on the second bend 30 12 'a Flächenendbiegung done.

From the foregoing it follows that the invention provides a method and a compact apparatus for the production of panes, by which a simple and cost-effective production of panes with short cycle times 35 is made possible. In particular, throughput in complex glass designs can be achieved be increased. Particularly advantageously, the transport time can be used on the press frame between the two bending molds for gravity bending in the interior of the area. Due to the feed chamber with carrier and press frame mounted on it, the press frame can be positioned with particularly high accuracy. The accuracy of the positioning of the disc on the pressing frame can be further improved by the pressing of the disc between the first bending mold and pressing frame in the edge region of the disc, wherein the disc in the edge region is bent or bent. As a result, slices with particularly high quality requirements can be produced. In addition, the tools of the two bending molds can be changed and / or serviced simply and inexpensively by the delivery chamber and tools carried on the carrier. Particularly advantageously, the tools can be heated before the assembly of the bending molds, so that the processing of slices after tool change can be continued quickly. The invention thus enables a particularly cost-effective production of discs with relatively short cycle times and particularly high quality requirements.

LIST OF REFERENCE NUMBERS

1 device

2 bending chamber

3 preheating zone

4 pretensioning zone

5 disc

6 disc transport mechanism

7 roll bed

8 roll

9.9 'bending station

10.10 'bracket

1 1, 1 1 'bending tool

12.12 'bending form

13,13 'bracket movement mechanism

14,14 'contact area

15,15 'outer surface section

16,16 'inner surface section

17 border area

18 indoor area

19 pane edge

20.20 'suction device

21 blowing device

22 removal position

23 first press frame / tool position

24 second press frame / tool position, first leader frame position

25 press frame

26 Carriage Movement Mechanism

27 carriers

28 pressing area

29 header box

30 bias frames

31 biasing frame movement mechanism

32 second header frame position

33 Blower air flow , 34 'Saugeinrichtungsluftstrom

second bending chamber door

Biegekammerwandung

Bending chamber cavity

Zustellkammer

Zustellkammerwandung

Zustellkammerhohlraum

Zustellkammerheizeinrichtung

Zustellkammerbewegungsmechanismus

Zustellkammeröffnung

Zustellkammertür

first bending chamber opening

first bending chamber door

Air cushion platform

carriage

carriage guide

driving means

, 51 'support device

support arm

, 53 'tool rest

second bending chamber opening

frame surface

Claims

claims

Method for bending disks (5) in a bending zone (2), which has a first bending mold (12) and a second bending mold (12 '), with the following steps:

Providing a heated to bending temperature disc (5),

- Fixing the disc (5) on a contact surface (14) of the first bending mold (12),

- Positioning a pressing frame (25) for the disc (5) in one of the first

Biegeform (12) associated first press frame position (23),

Transporting the disc (5) on the pressing frame (25) to a second pressing frame position (24) associated with the second bending form (12 '),

Fixing the disk (5) on a contact surface (14 ') of the second bending mold (12'),

wherein the press frame (25) is fixed to a support (27) inserted into the bending zone (2) by a feed module (38), and wherein the press frame (25) is moved by moving the carrier (27) between the first press frame position (23) and the second press frame position (24) is moved laterally relative to the first and second bending mold (12, 12 ').

2. The method of claim 1, wherein the delivery module (38) is movable and the bending zone (2) is delivered.

3. The method of claim 1 or 2, wherein at least one with the first bending mold (12) and / or the second bending mold (12 ') connectable tool (1 1, 1 1') on the support (27) between the delivery module ( 38) and the bending zone (2) is transported.

4. The method of claim 3, wherein the at least one tool (1 1, 1 1 ') in the delivery module (38) is heated.

5. The method according to any one of claims 1 to 4, wherein the carrier (27) in the first press frame position (23) and / or the second press frame position (24) is supported downwardly.

6. The method according to any one of claims 1 to 5, at disc (5) on the contact surface (14) of the first bending mold (12) and on the contact surface (14 ') of the second bending mold (12') is determined by

- Blowing the disc (5) with a gaseous fluid, whereby the disc (5) is raised and pressed against the contact surface (14, 14 ') of the bending mold (12, 12'), and / or

- Sucking the disc (5) to the contact surface (14, 14 ').

A method according to any one of claims 1 to 6, wherein, while the disc (5) is fixed to the contact surface (14 ') of the second bending mold (12'), a biasing frame (30) for supporting the disc (5) one of the second bending mold associated first biasing frame position (23) is transported, the disc (5) is placed on the biasing frame (30), and the wafer (5) carrying the biasing frame (30) relative to the second bending mold (12, 12 ') a second biasing frame position (32) for biasing the disc (5) is moved laterally.

8. Device (1) for bending discs (5), in particular for carrying out the method according to one of claims 1 to 7, which comprises:

a bending zone (2) having a first bending mold (12) and a second bending mold (12 '),

- A delivery module (38) which is delivered to the bending zone (2) so that a support (27) with a press frame (25) for a disc (5) in the bending zone (2) is insertable, wherein the pressing frame (25) by moving the carrier (27) between a first press frame position (23) associated with the first bending mold (12) and a second press frame position (24) associated with the second bending mold (12 ') relative to the first and second bending molds (12, 12') is.

9. Device (1) according to claim 8, wherein the feed module (38) relative to the bending zone (2) is movable.

10. Device (1) according to claim 8 or 9, wherein the bending zone (2) is designed as a bending chamber with a bending chamber cavity (37), wherein the first bending mold (12) and the second bending mold (12 ') are arranged in the bending chamber cavity (37), and wherein the feed module (38) is designed as a feed chamber with a feed chamber cavity (40), wherein the carrier (27) with press frame (25) can be arranged completely in the Zustellkammerlohlraum (40).

1 1. A device (1) according to claim 10, wherein

the Zustellkammerhohlraum (40) is heated.

12. Device (1) according to claim 1 1, wherein a support movement mechanism (26) for movement of the carrier (27) at least partially outside the heatable Zustellkammerlohlss (40) is arranged.

13. Device (1) according to one of claims 8 to 12, wherein at least one with the first and / or second bending mold (12, 12 ') connectable tool (1 1, 1 1') on the carrier (27) is transportable wherein the tool (11, 11 ') is associated by moving the carrier (27) between the bending zone (3) and one of the first bending mold (12) associated first tool position (23) and / or one of the second bending mold (12) second tool position (24) relative to the first and second bending mold (12, 12 ') is laterally movable.

14. Device (1) according to one of claims 8 to 12, wherein at least one support means (51, 51 ') for supporting the pressing frame (25) and / or the carrier (27) in the first press frame position (23) and / or in the second press frame position (24) is arranged.

15. Device (1) according to one of claims 8 to 14, which comprises a preheating zone (3) with a heating device for heating discs (5) to a bending temperature, and a transport mechanism (6), in particular of the roller bed type (7) Transporting discs (5) from the preheating zone (3) to the bending zone (2), and / or

a biasing zone (4) having cooling means (29) for thermally toughening a disc (5), wherein a biasing frame (30) for transporting a disc (5) from a first biasing frame position (24) associated with the second bending form to a second biasing frame position (32) in the biasing zone (4) relative to the second bending mold (12, 12 ') is laterally movable.