WO2004113242A1

WO2004113242A1 - Method and device for marking flat glass panes

Info

Publication number: WO2004113242A1
Application number: PCT/EP2004/006187
Authority: WO
Inventors: Manfred Vollbracht; Gerhard Rüschoff
Original assignee: Hegla Fahrzeug- Und Maschinenbau Gmbh & Co. Kg
Priority date: 2003-06-25
Filing date: 2004-06-08
Publication date: 2004-12-29
Also published as: DE10328617A1

Abstract

The invention relates to a method and a device for marking flat glass panes at a defined position with at least one distinguishing mark using a marking device. The marking is carried out mechanically on a glass plate which is to be divided up by notching and breaking, whereby said plate is broken up into flat glass panes after marking.

Description

Method and device for marking flat glass panes

The invention relates to a marking method and a marking device for marking flat glass panes, in particular laminated safety or single-pane safety glass panes with at least one mark.

The invention also relates to a device for marking flat glass panes.

Usually e.g. a glass raw or safety glass raw placed on a cutting table of a cutting station of a cutting system. A cutting tool arranged on a cutting head, which is arranged on a cutting bridge on a slide, is placed on the surface of the raw glass plate and driven in a program-controlled manner in such a way that the cutting tool scratches division cuts on the raw glass plate surface. After a pattern is finished, the cutting tool is raised. The divided raw glass sheet is then broken into glass panes in crushing stations, and the glass panes are marked for further processing. Instead of scribing and breaking, other division methods, e.g. laser thermal cutting can be used. All previous markings are made on the broken single pane.

The functional glasses already have to be labeled. Functional glasses subject to labeling include, for example, laminated safety glass and single-pane safety glass. The labeling obligation must be based on certain specifications in accordance with certification criteria. Among other things, it must include test numbers, manufacturing and product information.

Safety glass panes must be marked in accordance with an existing specification for certain areas. Based on the location of the number plate on the safety glass pane, a person or detection device who is involved in the production process up to the installation of the pane in a building can recognize, for example, how the pane must be aligned during installation.

The required orientation of the safety glass pane when it is installed for its intended use should be recognizable from the position of the license plate, because features such as the internal nature of the safety glass, which requires alignment of the safety glass pane, cannot be easily recognized when the glass pane is installed. The marking can also be used in particular for internal production sequence specification and / or machine assignment.

A known marking device has a table with fixed reading marks on which a cut from a raw glass sheet, e.g. Safety glass pane is placed by hand. Using a reading mark, a manipulation of the pane is used to determine a place where a color stamp is placed on the safety glass pane to be marked. In another device of this type, the safety glass pane is etched or sandblasted at the determined location.

A marking device that works with a laser device is also known.

All known methods have the disadvantage that the marking cannot be positioned so precisely that it can be used for orientation in a mechanical pus processing. processing of the glass pane can be used for exact alignment of the pane.

The position of the marking on the glass pane surface is usually defined on a glass corner, e.g. with a corner distance of 60 x 60 mm. However, the distance dimension is not always there and, depending on the installation requirements, may be desired elsewhere. To do this, the marking on the marking device must be moved. The reading position of the marking specifies in particular the later glass installation position.

The current error rate, such as wrong position, wrong distance, wrong reading direction, is considerable. Incorrectly applied product labeling can cause considerable damage and additional costs. In addition, labeling is currently very labor-intensive and time-consuming.

The invention is based on the object of avoiding the current error possibilities in the labeling of flat glass panes and of improving and simplifying the labeling in such a way that the labeling can be carried out reliably with little effort and in a relatively short time and can be carried out in such a precise manner, that it is even possible to use the marking for further processing of the glass pane by machine.

This object is solved by the features of independent claims 1 and 19. Advantageous developments of the invention are characterized in the dependent claims dependent on these claims.

The invention provides for the marking to be carried out preferably in a cutting system in which raw glass sheets are divided, for example by scratching and breaking or laser-thermal separation, on a raw glass sheet during the dividing lens, for example during scribing or before or after scribing or before or after thermal exposure by means of laser energy. In this case, a separate marking station of a cutting or separating station of a cutting system for raw glass sheets can expediently be connected upstream or downstream. However, a marking device is preferably used for marking, which is integrated into the existing cutting or separating station. The marking device itself is expediently installed on a bridge which can expediently be moved over a support table and can be moved on the bridge.

In the case of integration of the marking device into a cutting station, the marking device is expediently arranged on the cutting bridge and preferably on the cutting head or laser head and can be moved with the head. However, it is also advantageous to arrange the marking device on a separate bridge of the cutting station or - if a stripping device is provided for removing functional layers along scoring lines - on the stripping device.

Furthermore, it is expedient for the marking device to be interchangeable with the separating tool, e.g. to provide the cutting tool or stripping tool.

According to the invention, the marking is carried out in an automatically controlled manner with a marking program in that the marking device is connected to a control device and processes a program, for example by moving to a division field, for example a scratching field, the marking point of a single pane to be separated or broken visits and then carries out the labeling. Then the next field is approached and marked. This process is repeated until all the designated fields on the raw glass plate are marked. The cutting or cutting station of a cutting system is usually controlled by a control device with a pattern plan program. The cutting tool controls the cutting pattern in a controlled manner and generates lines corresponding to the cutting pattern, for example the rectangular fields generally having different sizes and different orientations, so that their identification location does not form a regular pattern. In addition, it is not necessary to mark every field of a single pane to be created.

According to an advantageous embodiment of the invention, the pattern program is used to design a control program for the marking, so that the marking device is oriented to the pattern, in particular scoring or dividing lines being used as reference or orientation lines for positioning the marking. Here, e.g. the marking takes place before or after the scratching or lasering.

It is of particular advantage that, according to the invention, the position of the marking and its spacing from the edges of the individual panes are no longer, as previously, generally determined by irregular broken glass edges is determined, but can be generated very precisely from precisely positioned lines or according to the program from imaginary lines. In addition, it is advantageous that marking directions or writing character directions can be chosen freely, since it is easy to provide the mobility, in particular the rotatability, of the marking device for this.

A marking device is preferably used which changes the glass surface point by point with a laser beam in such a way that the lasered point remains permanently visible. A laser marking device is expediently used, which makes it possible to identify a permanently visible point below the glass surface in the glass structure. witness. It is advantageous if this marking device can also produce markings point by point in the region of the glass surface.

It is within the scope of the invention to also use other marking devices, such as ink-jet, printing, sand-blasting devices or the like, known devices according to the invention.

With the invention, manual work, in particular the faulty alignment of a single glass pane with regard to the marking and writing direction for the marking of individual panes, can be switched off, the marking according to the program with the machine control without errors and e.g. to be provided automatically by the machine control system, with the alignment of the marks and characters being carried out by corresponding program control of the marking tool. Marking does require a lower speed compared to scribing and / or stripping and / or lasering, but it is nevertheless much faster and more precise than can be done with conventional methods.

Accordingly, particular advantages of the invention are:

Reduction of the error rate through automatic application during cutting, defined marking position (distance and reading direction) and

Specification of possible production process criteria; if necessary, a barcode (barcode) and / or data matrix code (point code) is also applied; significantly less expenditure of time; data preparation or data specification for labeling is done by the work preparation. Series markings can be called up on the machine control according to the memory request.

The invention can be used in particular for identifying functional glass such as safety glass, in particular laminated safety glass, single-pane safety glass or the like. For example, the indicator of a labeling requirement is sufficient according to certain certification criteria; the indicator contains e.g. Test numbers, manufacturer and / or product information. In addition, the marking can be used in an embodiment according to the invention for internal production sequence specification and / or machine assignment.

In one embodiment, the marking device according to the invention is designed as a retrofit element. For example, the retrofit marking device allows a cutting device, in particular a cutting device known per se, to be retrofitted with the marking device according to the invention.

The laser device that is preferably used has optics for focusing the laser beam and expediently a beam deflecting means, e.g. a mirror or a prism. The beam deflection means is, for example, arranged to be movable in order to deflect the laser beam within a solid angle. The laser device allows a particularly effective and / or precise processing of the flat glass. The label generated with the laser beam can be worked into the surface of the flat glass and / or into the glass body of the flat glass. The label can have letters, numbers and / or other characters, such as a bar code (also called bar code) and / or a point code (also called data matrix code) and / or a logo.

This laser marking device is preferably designed to be controllable. For example, power supply and / or Optics and / or the beam deflecting means or the like. Functional elements of the laser device can be controlled, so that, for example, the intensity of the laser beam, the wavelength of the laser beam or the polarization of the laser beam can be adjusted and / or controlled.

In one embodiment of the invention, the cutting system is set up to move the raw glass sheet during cutting. In this embodiment, the raw glass sheet to be cut can be moved back and forth in the cutting system, for example under the bridge, while the cutting device scratches or lasers and identifies the identification device.

In a further embodiment of the invention, the cutting step has a plurality of sub-steps, during which a continuous cut is carried out, two sub-steps being separated from one another by an interruption, during which no cut is made, the marking step essentially during the break between two substeps of trimming occurs. In this embodiment, the time required for cutting and marking is particularly short. The indicator is thus generated, for example, at a point in time at which the cutting or separating head starts a system-related stop function in the corner region of intersection points, for example intersection paths, in particular intersection lines - approach position for glass intersection line intersection point.

For example, a first substep of trimming is to make a first cut in a longitudinal direction, and a second substep of trimming is to make a second cut transversely to the longitudinal direction so that the cut edges in the end region of the first cut and the start region of the second cut form a corner form. The cutting tool becomes system-dependent after the first cut stopped, raised from the raw glass sheet, aligned to make the second cut, placed on the raw glass sheet and started. According to the invention, the identifier is generated during this system-related, anyway necessary interruption, so that an additional expenditure of time for the identification is minimized.

An embodiment of the method according to the invention is particularly preferred in which, during the interruption between two sub-steps of cutting, marking is carried out in an end area of the cut made during the first sub-step and / or in an initial area of the cut to be made during the second sub-step.

It is within the scope of the invention, e.g. optical means to control the marking device by optical sensors e.g. Detect scratch lines and a program calculates the labeling location and controls the labeling device in a controlled manner to set the label or labels.

Exemplary embodiments of the invention are explained in more detail below with reference to the drawing. Show it:

1 schematically shows a perspective top view of a cutting table of a cutting system according to a first embodiment of the invention;

2 schematically shows a perspective top view of a cutting table of a cutting system according to a further embodiment of the invention;

3 schematically shows a perspective top view of a cutting table of a cutting system according to a third embodiment of the invention; Fig. 4 schematically shows a top perspective view of a cutting table of a cutting system according to a fourth embodiment of the invention.

The cutting station 1 of a cutting system known per se and not shown and described in more detail for dividing a raw glass sheet 2 into individual panes 3 by at least scratching and breaking has usually. a cutting table 4 with integrated, known transport means (not shown) for the raw glass panel. Above the cutting table 1, a laterally supported cutting bridge 5 is arranged to be movable in the double arrow direction 6 in a program-controlled manner. A tool slide 7 is mounted on or on or in the cutting bridge 5 so that it can be moved in the double arrow direction 8 in a program-controlled manner.

The tool slide 7 carries a cutting tool carrier head 9 with a cutting tool (not shown) for generating scribe lines 11 on the raw glass plate 2.

In this respect, the cutting station 1 corresponds to the prior art.

According to one embodiment of the invention, a marking device 10 is expediently arranged on the tool slide 7 on a separate tool head (not shown) which moves together with the cutting tool head 9 in a program-controlled manner.

With the cutting bridge 5 and the tool slide 7, the marking device 10 can be moved in a program-controlled manner very precisely to or via a marking point 12 on the raw glass plate 2 and the marking can be carried out.

It is within the scope of the invention not to provide a separate tool carrier for the marking device 10, but to arrange the marking device 10 on the cutting tool carrier head 9.

The marking device 10 is expediently movable up and down perpendicularly to the cutting table surface and preferably also rotatably mounted about an axis of rotation lying perpendicular to the cutting table surface.

FIG. 2 shows a variant of a device according to the invention for marking glass panes at predetermined locations, the same device parts being identified with the same reference numerals in comparison to the device according to FIG. 1.

Above the cutting table 1 there is a second bridge 13, which can also be moved in the double arrow direction 6 and which carries a second tool slide 14, which can also be moved in the double arrow direction 8, on which the marking device 10 is mounted.

3 shows a device according to the invention, in which the second tool slide 14 is arranged to be movable on, on or in the cutting bridge 5 in the double arrow direction 8, and the marking device 10 is mounted.

4 shows a variant of the device according to the invention, in which a separate marking station 16 is arranged behind the cutting station 1 in the production direction 15. The marking station 16 has a marking table 17 arranged downstream of the cutting table 4 with integrated transport means (not shown) known per se for the storage and transport of the already scratched raw glass plate 2.

Arranged above the marking table 17 is a separate bridge 13 which can be moved in the double arrow direction 6 and which carries a tool slide 14 which can be moved in the double arrow direction 8 and on which the marking device 10 is mounted. The marking station 16 can, however, also be arranged upstream of the cutting station 1 in the production direction 15, wherein either the scratched raw glass plate 2 can be moved back again or an unribbed raw glass plate is marked in a program-controlled manner before the scratching. Likewise, the device according to FIG. 4 can first be marked in the marking station 16 and then moved back to the cutting station 1 for scribing.

It is within the scope of the invention to arrange the cutting bridges 5, 13 stationary and only the carriages 7, 14 movable in the double arrow direction 8, the glass raw panel 2 being known in a double arrow direction 6 on the tables 4, 17 in a manner known per se Means of transport and is held.

Claims

claims

Method of marking flat glass panes at a predetermined location with at least one mark using a marking device, i.e., the marking by machine on a machine by scratching and breaking or thermal separation, e.g. Laser-thermal separation or the like. To be divided glass raw sheet takes place, which is broken into flat glass panes after marking.

The method of claim 1, d a d u r c h g e k e n n z e i c h n e t, that the s the raw glass plate after scribing or lasering or the like. is marked.

A method according to claim 1 and / or 2, d a d u r c h g e k e n n z e i c h n e t, that the raw glass plate is marked before scribing or lasering or the like.

Method according to one or more of claims 1 to 3, characterized in that the raw glass plate is marked during the scribing or lasering or the like.

5. The method according to one or more of claims 1 to 4, d a d u r c h g e k e n n z e i c h n e t, that the marking is carried out on a glass table on a support table.

6. The method according to claim 5, wherein the marking is carried out with a marking device which is connected to a bridge arranged above the support table via a carriage that can be moved in, on or on the bridge.

7. The method of claim 6, d a d u r c h g e k e n n z e i c h n e t, that a s movable on and above the support table bridge is used.

8. The method according to claim 6 and / or 7, d a d u r c h g e k e n n e e c h n e t, that the marking is carried out with a marking device which is connected to a carriage arranged on, in or on the bridge movable.

9. The method according to one or more of claims 5 to 8, d a d u r c h g e k e n n z e i c h n e t, that a s s is used as the support table of the cutting table of a cutting system in which raw glass panels are divided.

10. The method according to claim 9, characterized in that a marking device is used which is connected to the cutting bridge, in particular via the cutting tool slide of the cutting bridge or via a separate slide.

11. The method according to claim 10, d a d u r c h g e k e n n z e i c h n e t, that a marking device is used, which with a tool head, e.g. a cutting tool, which is arranged on the cutting tool carriage, is connected.

12. The method according to one or more of claims 1 to 11, d a d u r c h g e k e n n z e i c h n e t, that the labeling device is automatically program-controlled to the labeling location and at the labeling location to design the label.

13. The method as claimed in claim 12, since a control program is used which is combined with the scratch pattern program.

14. The method as claimed in claim 13, in which an optical sensor is used to control the respective identification point, which is based on distribution lines and supplies measured values of recognized lines to the control program for the identification.

15. The method according to one or more of claims 1 to 14, d a d u r c h g e k e n n z e i c h n e t, that a laser marking device is used.

16. The method according to claim 15, characterized in that a laser marking device is used which works under the surface of the raw glass plate and a mark is generated in the glass structure below the surface.

17. The method according to one or more of claims 13 to 16, d a d u r c h g e k e n n z e i c h n e t, d a s s during an interruption of division steps, e.g. Scratching steps are marked during the splitting.

18. The method according to claim 17, wherein the marking is carried out at a time when the cutting head starts a system-related stop function in the corner region of intersection points.

19. Device for marking flat glass panes at a predetermined location with at least one mark using a marking device, in particular for carrying out the method according to one or more of claims 1 to 18, characterized by a support table (4) for a flat glass plate (2) above which an automatically operating, controlled marking device (10) is preferably arranged on a slide connected to a bridge.

20. The apparatus of claim 19, d a d u r c h g e k e n n z e i c h n e t, that it is part of a cutting system or separation system having at least one cutting station (1) for dividing a raw glass sheet (2) into individual panes (3) by at least scratching or lasering or the like and breaking.

21. The apparatus according to claim 20, characterized in that the support table is the cutting table (4) of the cutting station (1), over which a laterally supported cutting bridge (5) is arranged on, in or on which a tool slide (7) is movably mounted is.

22. The apparatus of claim 21, d a d u r c h g e k e n n z e i c h n e t that the tool slide (7) carries the identification device (10).

23. The apparatus of claim 22, d a d u r c h g e k e n n z e i c h n e t, that the marking device (10) on a tool head, e.g. a cutting tool head (9) is arranged, which is connected to the tool slide (7).

24. The device according to claim 20, characterized in that above the cutting table (4) a second, preferably movable bridge (13) is arranged on, in or on which a tool slide (14) is movably seated, on which a marking device (10) is mounted ,

25. The apparatus of claim 21, 22 and 23, d a d u r c h g e k e n e e c e n c e n e t, that a second tool slide (14) on, on or in the cutting bridge (5) is arranged movable and a marking device (10) is stored.

26. The device according to claim 20, characterized in that a separate marking station (16) is arranged behind or in front of the cutting station (1), which has a marking table (17) downstream or upstream of the cutting table (4), over which a bridge (13) is arranged, which carries a on, in or on the bridge (13) movable tool slide (14).

7. The device according to one or more of claims 19 to 26, d a d u r c h g e k e n n z e i c h n e t, that the bridges (5, 13) are arranged to be movable.