WO2015117172A1

WO2015117172A1 - Method for cutting laminated glass

Info

Publication number: WO2015117172A1
Application number: PCT/AT2015/000018
Authority: WO
Inventors: Markus Schoisswohl; Gerald Eichler; Daniel SCHÖRGHUBER
Original assignee: Lisec Austria Gmbh
Priority date: 2014-02-10
Filing date: 2015-02-05
Publication date: 2015-08-13
Also published as: EP2978716A1

Abstract

In order to cut a laminated glass sheet (1) into laminated glass panes, thermal stress is created in the glass of the glass panes (2, 3) of the laminated glass sheet (1) in the region of the cutting line (5) by locally supplying heat so that the laminated glass sheet (1) is cut into two laminated glass panes, force being additionally applied if necessary. Heating elements (6) that emit infrared or laser beams can be used for locally heating the sheet (1), in particular without interruption along the entire length of the cutting line (5). Preferably, the heating elements (6) are located on both sides of the laminated glass sheet (1).

Description

METHOD FOR SHARING COMPOSITE GLASS

The invention relates to a method for dividing laminated glass and a device suitable for carrying out the method, with which the method according to the invention can be carried out in an advantageous manner.

When separating (cutting, dividing) laminated glass, both glass sheets are scribed where they are to be separated, ie along the dividing line, and finally deformed (buckling, bending, drawing, applying pressure) along the dividing line

Crack line broken.

When separating laminated glass into glass blanks, the polymeric interlayer of laminated glass, which typically consists of at least one film, must be severed. Typically, films in laminated glass consist of a thermoplastic, e.g. B.

Polyvinyl butyral (PVB).

For separating films in laminated glass panels in

Laminated glass panes are different methods and

Devices known. For example, the film can through

Heat effect (infrared radiator or laser source)

be melted or cut with the help of a blade. Such techniques are known from EP 1 044 930 A and EP 0 691 311 A.

If the film is to be cut in laminated glass using a blade, it is necessary to cut the two parts of the

Laminated glass after breaking the two glass panes

pull apart to create a gap in which the blade can engage the composite foil.

The pulling apart is aided in that the film is heated in the region of the gap to be formed and thereby becomes soft (EP 1 108 690 A). In the prior art, elongated heating elements (heating rods) are used to heat the film into laminated glass, whether it serves to soften the film so that the gap for the blade can be opened or to melt the film. Such heating rods extend along the

Division line so that the film is heated in the area where the separation is to take place.

From EP 1 323 681 A it is known, heating rods with a

To surround reflector, which has a slot-shaped opening, so that heat radiation is directed to the film only in the region of the separating gap.

From JP 2005231959 A, it is known to bundle heat rays emitted by a heating rod, for which purpose a reflector

is used, which is concavely curved after an elliptical arc. In a focal line of the cross-sectional ellipse is the

Heating rod arranged so that the heat rays are focused in the other focal line.

From EP 1 336 591 A2 a method and a device for separating glass sheets by means of laser are known. In this known method, thermomechanical stresses are generated by irradiation in the region of the desired division line by a heat source, in particular a laser emitter, wherein the laser beam emitting device along the dividing line at least one laser beam is emitted and a means for reflection of the laser beam below the glass sheet, ie the laser beam is moved opposite.

From WO 2010/031663 AI a method and an apparatus for separating laminated glass is known. In this

known method is intended in an automatic working

Laminated glass cutting machine along the composite glass panel

scratched predetermined dividing lines and then closed

Laminated glass broke and the composite foil in Fracture area are severed. Before breaking, the material of the composite film along the dividing lines is melted, perforated or melted through with a laser beam of a laser device.

From US 2011/0107894 Al it is known for producing chamfers on workpieces made of brittle material, such as glass, to generate a scribe line along the edge with the aid of a cutting wheel and then to abort the region lying outside the scribe line by heating and / or cooling so that a chamfer forms.

GB 346,697 A describes a method for dividing

Laminated glass. In this procedure, the intended

Dividing line heated by an electric heating wire, as shown in Figure 1. In addition, adjacent to the wire on the glass not fitting heating elements can be used. In GB 346,697 A is mentioned that by heating a

Glass pane of laminated glass with the help of the wire thermal stresses are generated. This is to lead according to GB 346,697 A cause the glass sheet on which rests the wire breaks along the dividing line. It is mentioned in GB 346,697 A that the second glass pane of laminated glass passes through

Crevices and can be divided by a blow or with the help of the arrangement with a heating wire, as has been used for dividing the first disc. GB 346,697 A also mentions that heating wires can be used to heat the composite foil after both glass sheets have been split. The heating is carried out to the

Pull apart the two parts of the laminated glass to

facilitate, as mentioned on page 3 in lines 37 to 41 of GB 346,697 A.

In the operation of GB 346,697 A, it is not intended that the glass sheet of laminated glass, which is thermally split, be previously scored. It will be a glass of Laminated glass without prior scribing split, whereas the other glass pane of the laminated glass is purely mechanical, namely divided by scribing and deformation (bending). However, thermal splitting without prior scribing has the disadvantage that often no clean and smooth break is obtained.

EP 0 835 847 AI is also concerned with the splitting of laminated glass and, in particular, proposes measures for how parts of laminated glass can be pulled apart to accommodate the

To split composite foil. It is mentioned as a possibility for the parts of the composite film, the use of radiant heat from a radiation source with a reflector.

The splitting of the glass panes of laminated glass obviously takes place with the aid of conventional cutting bridges and by breaking, as the statements in column 8, lines 25 to 35 in conjunction with FIG. 10 of EP 0 835 847 A1 show.

EP 2 177 482 A1 discloses the splitting of laminated glass by scoring both glass sheets and then breaking them. To share the composite film this is assigned by a her

Resistance heating element to be heated.

US 2008/0236199 A1 discloses a method for the thermal splitting of brittle, non-metallic material, in particular a glass sheet or laminated glass (FIG. 4). It should

Microwave radiation can be applied to generate compressive stresses, wherein the splitting of glass occurs when the thermally induced stresses are greater than the tensile strength of glass. The application of this method to laminated glass is mentioned in paragraph [0038] with reference to FIG. 4 of US 2008/0236199 AI.

From the unpublished documents EP 2 784 032 A,

EP 2 783 786 A and EP 2 783 785 A are devices and

Process for the thermal division of glass and laminated glass known .

DE 20 2007 001 346 Ul relates to a method for the thermally separating machining of brittle-brittle components

Material, especially glass. It should be with the help of

Laser radiation generated a thermally induced stress crack along a separation zone. For running the

Procedure is a special arrangement of reflectors

provided, which comprises two opposing reflectors, wherein in one of the reflectors, an opening is provided, through which the laser beam to enter the region between the reflectors and is to be reflected back and forth between the reflectors several times. Any indication of heating foils in laminated glass is in the

DE 20 2007 001 346 Ul not included.

In conventional parts of laminated glass panels in

Laminated glass panels are usually carried out as follows:

Cracking of both glass sheets (substrate and superstrate of the laminated glass forming laminate).

Opening the separation gaps by generating mechanical

Strains by deformation, such as buckling, buckling, pulling, exerting pressure, including crushing rollers, crushing bars and the like are used.

Pulling apart the parts of the composite glass sheet across the separation gap, wherein the film is previously or simultaneously heated, i. softened, is to simplify pulling apart. For heating the film, various means can be used, such as rod-shaped

Infrared heaters (heating rods), lasers, hot air blowers and the like.

Separate the film by melting or with the help of a cutting tool. The disadvantages of conventional methods for separating

Laminated glass panels in laminated glass panes are:

Long cycle times, since there are many separate steps to perform - scratches, breaking from above, breaking from below

Softening and pulling apart the foil, foil cut. Deforming the composite glass panel to open the

Separation column requires high forces. The components that are to transmit the forces for deforming must be designed accordingly.

The quality of the break is often poor, as so-called upper and lower fractures may occur. Upper and

Interruptions are breaklines where the fracture edges of substrate and superstrate are not aligned.

The invention has for its object to provide a method and an apparatus available for sharing

Laminated glass panels are more effective than the known methods and devices.

This object is achieved according to the invention with a method having the features of claim 1.

As far as the device is concerned, the object underlying the invention is achieved with a device having the features of independent, directed to the device claim.

Preferred and advantageous embodiments of

inventive method on the one hand and the

On the other hand device according to the invention are the subject of the dependent claims.

In the invention, since the separation gaps in the glass sheets are not formed by deformation or at least not by deformation alone, but also by local heating (Temperaturbeaufschlagen) takes place along the intended dividing line, it comes in a complete break to a

Breaking independently along the scribe line, the breakage is not complete, mechanical action is taken to complete the break.

In this case, the fracture thus brought about can be complete (extends over the entire length of the scribe line) or partially (the fracture does not extend over the entire length of the scribe line, but can already be achieved by light mechanics, for example by the action of the scribe line

Scratching tool, to be completed).

In the method according to the invention is in a

Embodiment prefers composite film heated (glass is more transparent to infrared radiation than the composite film), so that in the glass local stresses arise in the field of

Score line to break.

Within the scope of the invention, it is considered to choose the radiation such that preferably the glass sheets of the laminated glass are locally heated in order to break them in the glass

Create tension.

In the invention, the radiation can be directed from one side or from both sides onto the laminated glass.

The heating has the advantage that it leads along the dividing line at the same time to a reduction of the stiffness of the film in the composite glass sheet, which is for the following

Pull apart and (mechanical) separation of the composite film is advantageous because a separate heating of the composite film is unnecessary.

If, in the method according to the invention, the opening of the separating gaps is not carried out by applying heat alone, but is additionally mechanically deformed (which in certain embodiments) Cases may be required), there are still the benefits of comparatively smooth and on the glass planes normal standing fracture surfaces (minor upper and lower fractures, no mussels, as they can occur in purely mechanical breakage) and the advantage of due to a low load bearing Less complicated to design breaking mechanics.

It is also advantageous in the method according to the invention that the cycle time for the entire separation process is shortened. This is also true if a mechanical deformation is also carried out for breaking, since in this case the upstream one

No heat applied to heat Loss of time compared to conventional cutting means that a heating step is also provided for the latter.

The application of heat to the composite glass panel in the region of the dividing line can be carried out, for example, by means of laser or by means of heat radiators (heating rods). The latter are less in terms of technology and safety technology

elaborate.

Specifically, in the method according to the invention

for example, be worked according to the variants described below.

1st cracks - heating to break - mechanical Nachbruch

(if required).

2. cracks - heating for breaking - cracks for breaking,

which can be used for breaking not conventional crushing tools, but faster-working scoring tools.

3. Heating - scratches with simultaneous breaking.

In practicing the method according to the invention, a device may be used which has heat sources located on both sides of the composite glass sheet in the region of the scribe line to be ordered. For example, infrared radiators are provided above and below the composite glass panel.

In an alternative embodiment, the heat source can be arranged on only one side of the composite glass panel and on the opposite side a reflector can be provided, which is elongate and has a reflection surface facing the laminated glass, in particular a concave reflection surface.

If a reflector is provided in the invention, which is located on the side of the composite glass panel, which is opposite to the source of thermal radiation, which is through

Composite glass panel passing thermal radiation at least partially reflected and contributes to the local heating of the

Composite glass panel at. Thus, a higher efficiency in generating the thermal stress than previously achieved.

In one embodiment it is provided that the

(Rod-like / n) source / s for thermal radiation over the entire length of the dividing line extends / extend and that also a possibly provided reflector is provided substantially over the entire length of the dividing line.

Preferably, the reflector has a trough-shaped form.

In one embodiment of the invention it is provided that a reflector is provided, which is rigid.

In one embodiment of the invention it is provided that the reflector with the aid of a pivoting device in the heat radiation opposite the active position in the region of the division line undeliverable and can be swung out into a standby position.

In one embodiment of the invention, the reflector is moved by a movement which is or comprises a linear movement its the heating element opposite position

("Active position") moves.

In this embodiment it can be provided that the

Reflector is a band that consists of flexible material. Especially considered is a steel band.

The embodiment with a band-shaped reflector made of flexible material allows the reflector

if necessary, to move over pulleys to a standby position. From the ready position, in which the band forming the reflector, for example below a

Support surface on which the composite glass panel to be divided

rests, is located, the band forming the reflector is moved into its operative position above the support surface. The

The reflector can be used while the composite glass panel is being scratched. In one embodiment, after the scratches of the composite glass sheet, the reflector becomes out of

Ready position moved into its operative position.

It can be provided that the reflector in his

Ready position is rolled up in a retractor and is pulled from the retractor, for example via pulleys in its operative position.

For moving the reflector to move it into its operative position, a separate drive may be provided.

Preferably, in the context of the invention, when the reflector is moved (pulled) by the already existing, along a cutting bridge of a device for dividing laminated glass adjustable cutting head (with which is scratched) in its operative position.

In general, the, for example, channel-shaped, reflector will be aligned so that its apex line parallel to Support surface or the dividing laminated glass is aligned.

The distance of the crest line from the support surface can be fixed. It is also considered within the scope of the invention to adjust the reflector in order to adapt its distance from the support surface and thus from the composite glass panel to be divided to the given conditions. For example, it may prove beneficial to use the reflector with thinner

Laminated glass closer to the support surface to arrange than thicker laminated glass.

For example, it can be provided in the context of the invention that the reflector spacer means are assigned and that the reflector is resiliently loaded against the laminated glass out.

In the context of the invention, measures can be provided to prevent the reflector, in particular if it consists of a roll-up band, sagging in its operative position. Slack can be avoided by the reflector is tensioned or stiffened in its operative position. A stiffening can be achieved, for example, by connecting the (curved) steel strip forming the reflector back to back with another (eg channel-shaped) steel strip. This embodiment has the advantage that the interconnected steel bands when moving the reflector in and out of his

Active position can be rolled off or rolled up. In this case, the reflector, optionally connected to its support band, are deflected by pulleys when he in his

Ready position under the support surface for the

Laminated glass is moved.

In the context of the invention, it is preferred if the reflector has a concave cut line perpendicular to the channel axis.

The cutting line of the reflector can be like a

Ellipse arc or be designed in the manner of a circular arc. In a practical embodiment, the reflector, at least on its concave surface (reflection surface), consists of a material which has a high reflectivity for the heat rays emitted by the source of thermal radiation

having. When infrared radiation is used for heating the composite glass panel in the region of the scribe line to divide the composite glass panel into laminated glass panes, at least the reflecting surface of the reflector may be made of metal.

In an embodiment of the invention, the procedure may be such that a laser radiation source is used for heating.

In one embodiment of the invention, it is possible to proceed in such a way that an infrared radiator, in particular a heating rod, is used for heating.

In one embodiment of the invention, it is possible to proceed by using heating sources for heating, which are arranged on both sides of the composite glass panel in the region of the dividing line.

In one embodiment of the invention, it is possible to proceed in such a way that a reflector with a metallic, in particular concave, reflection surface is used.

In one embodiment of the invention, it is possible to proceed by using a reflector which lies opposite the source of heat radiation over its entire length.

In one embodiment of the invention, it is possible to proceed in such a way that the reflector is moved into its operative position with the aid of a cutting head provided in a device for separating laminated glass, in particular pulled into its operative position. Further details, features and advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings. It shows:

Fig. 1 shows schematically an arrangement for carrying out the

inventive method,

Fig. 2 shows a first embodiment with einschwenkbarem

Reflector,

Fig. 3 shows an embodiment with a band-shaped reflector, Fig. 4 shows a modified embodiment with a

band-shaped reflector,

Fig. 5 shows schematically an alternative embodiment of a

inventive arrangement and

Fig. 6 shows another alternative embodiment of a

inventive arrangement with a reflector.

In the embodiment shown in Fig. 5 is a

Composite glass panel 1 in the region of its dividing line 5 for generating the thermal stresses on both sides (above and below) an infrared source, for example in the form of a heating element 6, e.g. in the form of a rod-shaped radiant heater, assigned. The radiant heater may be surrounded by a housing which has a slot-shaped outlet opening which is directed onto the laminated glass 1.

In the alternative embodiment shown in FIG. 6, a heating element 6 is assigned as infrared source only on one side of the composite glass panel 1, here the lower glass panel 2 (substrate), above the composite glass panel 1, ie above the upper glass panel 3 (superstrate) a concave curved reflector 10, which may be formed as will be described below with reference to FIGS. 1 to 4, is arranged.

Instead of the heating elements 6, or only one of them, can also be used to generate the required for the breakage of the glass sheets 2 and 3 of the composite glass sheet 1 thermal stress Laser sources are used.

Although in the in FIGS. 1 to 4 shown

Embodiments, the combination of a heating element 6 (or a laser source) is provided with a reflector 10, in the context of the invention, the use of two heating elements 6 is taken into consideration.

For double-pane laminated glass, a laser source will usually suffice. When laminated glass is to be divided into three (or more) glass sheets, it may be considered to employ two laser sources provided on both sides of the laminated glass.

Fig. 1 shows a part of a composite glass sheet 1, consisting of two glass sheets 2 and 3 and a film 4 arranged therebetween (composite film), wherein the glass sheets 3 and 4 along a dividing line 5 are still to break.

Below the laminated glass 1, a heating element 6 is provided, which extends over the entire length of the dividing line 5. In one possible embodiment, the heating element 6 may be formed as a glass tube, in which a heating coil is accommodated. The glass tube carries (inside) a (reflective) coating, which is interrupted in the exit region of the radiation. The inner coating can concentrate the radiation.

At the heating element 6 opposite side of the

Composite glass panel 1, a reflector 10 is provided. Also, the reflector 10, which is arranged in Fig. 1 above the composite glass panel 1, ie on the heating element. 6

opposite side, extends over the entire length of the division line. 5

The reflector 10 has a cross-sectional shape ("cut line"), which corresponds to a circular or elliptical arc. In the embodiment shown in Fig. 2, the reflector 10 is provided in a rigid body 13, which with a

(metallic) mirror coating 14 is provided. Of the

Reflector 10 is disposed on a crossbar 15 (cutting bridge) of a device for dividing a laminated glass sheet 1.

In the embodiment shown in Fig. 2, the reflector 10 is pivoted into the operative position shown in Fig. 2 and can by pivoting by means of a pivoting device 18 about an axis 15 located above the crossbar 15 from the

Active position be swung out in a Bereitschaffsstellung.

Fig. 2 shows that the distance of the reflector 10 from the

Composite glass panel 1 and the bearing surface of the device for cutting a composite glass sheet 1, on which the

Composite glass panel 1 rests, can be changed. For this purpose, a lifting mechanism 17 for adjusting the reflector 10, the normal to the pivoting device 18 via a guide 19

Composite glass panel 1 is guided, provided. The lifting mechanism 17 comprises a rotationally driven threaded rod 21, which engages in a threaded bore 20 in the body 13 of the reflector 10.

By turning the threaded rod 20, the guided on the guide 19 reflector 10 can be adjusted normal to the plane of the laminated glass 1.

In the embodiment (side view) shown in FIG. 3, a heating element 6 is provided beneath the composite glass panel 1. The reflector 10 is band-shaped and is on the side of the

Composite glass panel 1 is provided, which is opposite to the side on which the heating element 6 is provided.

For example, the band-shaped reflector 10 of FIG. 3 is made of steel and is oriented to be concave as viewed in FIG. 1 as viewed from the laminated glass 1. The

Section line of the reflector 10 of Fig. 3 and its arrangement relative to the laminated glass 1 and the heating element 6 corresponds to the for the embodiment shown in Fig. 1 said.

The embodiment of the reflector 10 in the form of a steel strip allows this in a roll-up mechanism 25th

is rolled up when it is moved in a linear movement from its operative position shown in Fig. 3 in its standby position.

Although for the extension and retraction of the band-shaped

Reflectors 10 may be provided drives is considered in the invention and shown in Fig. 3, that the free end 26 of the band-shaped reflector 10 is connected to a movable on the crossbar 15 of the cutting device cutting head 29. In this case, the free end 26 of the band-shaped reflector 10 can be coupled via a projection 27 by means of a mechanical clamping device 28 with the cutting head 29.

The variant of the embodiment with a ribbon-shaped reflector 10 shown in FIG. 4 is the roll-up mechanism 25 under the support surface of the cutting device for a

Composite glass panel 1 is arranged. Coming from the reeling mechanism 25, the band-shaped reflector 10 is deflected by two pulleys 30 and then in a linear motion in his

Active position, ie on the heating element 6 opposite side of the composite glass panel 1, moves. Also at the

Embodiment of Fig. 4 is provided that the free end 26 of the band-shaped reflector 10 is attached via a clamping device 28 on the cutting head 29 of the laminated glass cutter, so that it can be moved with and from this.

In the embodiments shown in Fig. 3 and in Fig. 4, the retractor 25 drives or memory springs can be assigned, which is the rolling of the band-shaped reflector 10, when this in its operative position and / or in his

Standby position is assisted. The reflector 10 should not sag. In order to prevent sagging of the reflector 10, spacing means can be provided which hold the reflector 10 at the desired distance in front of the composite glass panel 1 to be divided. If such spacers are distributed along the length of the reflector 10, they prevent sagging of the reflector 10.

In particular, when the reflector 10 is a band of flexible, in particular elastic material, the reflector 10 may be stretched in its operative position to avoid sagging of the reflector 10 or at least to reduce to a reasonable extent.

A reflector 10 may also be connected to a reinforcement which prevents sagging of the reflector 10 or at least reduces it to a reasonable extent.

In the case of reflectors 10 of FIG. 3 and FIG. 4

In embodiments shown, the reflector 10 may be connected to a reinforcement stiffening it. Such

Reinforcement may be a strip of elastic material. Preferably, the reinforcing strip is curved (trough-shaped) such that its side facing away from the reflection surface of the reflector 10 is concave. The arrangement of the reinforcing strip and the reflector 10 connected to the strip has an approximately X-shaped cross-sectional shape. This allows the

Reflector 10 together with the strip, for example, in a roll-up mechanism 25 to roll up (standby position) and to roll out of this again when the reflector 10 is moved to its operative position (Figures 3 and 4).

The inventive method is also for the parts of

Laminated glass with more than two glass panes suitable. For example, to split laminated glass with three panes of glass, the procedure may be as follows: In a first step, the two outer glass panes are scratched.

Thereafter, the outer glass sheets are thermally broken using the method according to the invention.

At one edge of the middle glass pane, the edge surface of the middle glass pane is scored in the intended dividing line. This scratching of the edge surface of the central glass pane can also be carried out simultaneously with the scratches of the outer glass panes in a modified mode of operation.

Thereafter, the middle glass pane by acting

mechanical forces, such as buckling, buckling, pulling or exerting pressure, broken. This process of dividing the middle glass pane is thereby advantageously supported, that the middle glass pane was heated locally by the action of heat on the outer glass panes, so that in the region of the dividing line in the middle glass pane thermal stresses are present, the breaking of the advantageous support medium glass pane.

In summary, an embodiment of the invention can be described as follows:

For dividing a laminated glass panel 1 in laminated glass panes are in the region of the division line 5 in the glass sheets 2, 3 of the composite glass panel 1 by local supply of heat

thermal stresses generated in the glass of the glass sheets 2, 3, so that optionally under additional force the

Composite glass panel 1 is divided into two laminated glass panes. For the local, especially the entire length of the

Division line 5 continuous heating can infrared or laser beam emitting heating elements 6 are used. The heating elements 6 are preferably on both sides of

Composite glass panel 1 is provided.

Claims

Claims :

A method of dividing a laminated glass sheet (1) along a dividing line (5) into two laminated glass sheets by scribing the surfaces of both the glass sheets (2,3) and the outer glass sheets (2, 3) of laminated glass sheets (1) comprising more than two glass sheets along the

Division line (5), opening one gap in each

Glass sheets (2, 3), pulling apart the laminated glass sheets thus obtained to enlarge the gaps and separating the composite sheet (4) along the dividing line (5), characterized in that the opening of the gaps in glass sheets (2, 3) by locally heating at least one of the glass panes (2, 3) takes place in the region of the dividing line (5) and along the length thereof.

2. The method according to claim 1, characterized in that thermal stresses are generated by the

Heating at least one of the glass panes (2, 3)

Temperature differences are generated.

3. The method according to claim 1 or 2, characterized in that both glass sheets (2, 3) of the composite glass sheet (1) for opening the separating gaps along the dividing line (5) are heated.

4. The method according to claim 2 or 3, characterized in that the glass sheets (2, 3) for generating thermal

Tensions are heated by primarily the composite foil (4) is heated locally.

5. The method according to claim 4, characterized in that for heating a radiation is used, which is of the

Composite film is absorbed more strongly than by the

Glass panes (2, 3).

6. The method according to any one of claims 1 to 5, characterized in that for local heating of the

Glass panes (2, 3) Radiation is directed from one side onto the composite glass panel (1).

7. The method according to any one of claims 1 to 5, characterized

characterized in that for local heating of the

Glass panes (2, 3) from both sides on the

Composite glass panel (1) radiation is directed.

8. The method according to any one of claims 1 to 7, characterized

characterized in that infrared radiation is used for heating.

9. The method according to any one of claims 1 to 7, characterized

characterized in that for heating laser radiation is used.

10. The method according to any one of claims 1 to 9, characterized

in that at least one of the glass panes (2,

3) of the composite glass panel (1) is heated before the scratches of the glass sheets (2, 3) along the dividing line (5).

11. The method according to any one of claims 1 to 10, characterized

in that at least one of the glass panes (2, 3) of the composite glass panel (1) is heated simultaneously with the score along the dividing line (5).

12. The method according to any one of claims 1 to 11, characterized

in that at least one of the glass panes (2, 3) of the composite glass panel (1) is heated after the score along the dividing line (5).

13. The method according to any one of claims 1 to 12, characterized

in that, for heating purposes, a heating source (6) is used which is only on one side of the Composite glass panel (1) is arranged and that the heat source (6) opposite to the other side of the

Composite glass panel (1) a reflector (10) is arranged.

14. The method according to claim 13, characterized in that the reflector (10) in his and his from the source (6) opposite thermal radiation active position

is adjusted.

15. The method according to claim 14, characterized in that a flexible reflector (10) is used, which is moved from its standby position, in which it is rolled up, in its extended operative position.