KR102397590B1 - Method for manufacturing a glass plate - Google Patents

Abstract

After inspecting the defects of the glass disk and generating defect information, the identification information is attached to the glass disk. Based on the defect information, cutout division information of the glass original plate and quality information for each division are calculated by calculation, and each piece of information is associated with identification information in the first database 1a of the first server 1 and stored. . The cutout classification information and quality information excluding the defect information of the first database 1a are transmitted from the first server 1 to the second server 3, and to the second database 3a of the second server 3 Linked to identification information and memorized. While the identification information of the glass original plate is scanned and the corresponding cutout classification information and quality information are acquired from the 2nd server 3, a glass plate is cut out from a glass original plate based on each acquired information, and a good quality is selected.

Description

Method for manufacturing a glass plate

This invention relates to the manufacturing method of a glass plate.

In recent years, in the manufacturing process of a glass plate, the method of cutting out the glass plate of 1 sheet or several sheets used as a product from a viewpoint of productive efficiency etc. from a large-area glass original plate may be employ|adopted. Such a method is widely used in the manufacturing process of glass substrates for flat panel displays (FPD), such as a liquid crystal display, a plasma display, and organic electroluminescent display.

Specifically, for example, there are cases where the mother glass is cut out from a molded original plate manufactured by cutting a glass ribbon to a predetermined length by the float method or the down-draw method, or the glass substrate for FPD is cut out from the mother glass. . In the former case, the shaping|molding master becomes a glass original plate, and in the latter case, the mother glass becomes a glass original plate.

When a glass plate is cut out from a glass original plate, a defect inspection is performed in the state of a glass original plate. As a result of this defect inspection, if even one defect which does not satisfy the quality standard exists in a glass original plate, it has become a custom to discard the whole glass original plate as a defective product. However, when such handling is carried out, in addition to inevitably increasing the probability of occurrence of defects in accordance with the enlargement of the glass original plate, the amount of glass lost by disposal becomes very large. As a result, it becomes a cause of causing a rise in manufacturing cost.

So, for example, in Patent Document 1, defect information of a plurality of pieces of mother glass, a plurality of different cutout arrangement information, and its evaluation reference information are accumulated, and the combination of those information is sequentially changed and the simulation is repeated. It is disclosed to perform the process of finding the combination in which the cutout of the glass substrate for liquid crystal display devices is possible. Thereby, even when a defect is contained in mother glass, the mother glass can be utilized effectively and the increase of manufacturing cost can be prevented.

Publication WO2003/087923

However, in the configuration for measuring or calculating various information of the glass original plate as described above, and determining the optimal cutout classification of the glass original plate based on these information, the measured or calculated information is stored and managed in the database of the server It is common. In this case, for example, in the process of cutting out a glass plate from a glass original plate (henceforth a processing process), information is acquired from a server through a predetermined network etc., and it cuts a glass original plate based on the acquired information.

However, in the database of the server, a lot of detailed information about the glass original plate, such as defect information including the position, size, and kind of a defect, for example is memorize|stored. Therefore, when it is attempted to acquire detailed information including defect information from the server in the machining process, the amount of data is very large and the load on the server increases. In particular, when a machining process is performed simultaneously in a plurality of places, the server load becomes remarkable. As a result, it becomes easy to generate|occur|produce system malfunction, such as a fall of a server function, and a temporary server down. Therefore, necessary information cannot be acquired smoothly from a server, and the situation which cannot manufacture a glass plate efficiently from a glass original plate may arise.

This invention reduces the server load in which the information regarding a glass original plate is memorize|stored, and makes it a technical subject to manufacture a glass plate efficiently from a glass original plate.

The present invention, devised to solve the above problems, is a process of generating defect information by inspecting the defects of the glass original plate, and the cutout classification information of the glass original plate based on the defect information and the quality indicating whether the quality of each classification is passed A step of obtaining information by calculation, a step of storing defect information, cutout classification information and quality information in a first database of a first server, and a step of storing cutout classification information and quality information from the first server except for the defect information The process of transmitting to the second server and storing it in the second database of the second server, the process of acquiring cutout classification information and quality information corresponding to the identification information of the glass original plate from the second server, It is characterized by comprising the steps of cutting out one or more glass plates from the original glass plate based on the cutout classification information, and selecting good products from among the glass plates based on the quality information acquired from the second server.

According to this configuration, the server for managing various information is divided into a first server and a second server. Detailed information including defect information, cutout classification information, and quality information is stored in the first database of the first server, and the second database of the second server contains cutout classification information excluding the defect information and simple including quality information information is remembered. And in the processing process including the process of cutting out a glass original plate, and the process of classifying the cut out glass plate, various information cannot be directly acquired from a 1st server, but simple information acquired from a 2nd server is used. Therefore, in the processing step, an excessive load is not applied to the first server, and the information acquired from the second server is only simple information, so that an excessive load is not applied to the second server. Therefore, since the state which can acquire the information required for a process smoothly from a 2nd server can be stably maintained, it becomes possible to manufacture a glass plate efficiently from a glass original plate.

Said structure WHEREIN: After the process of producing|generating defect information, and before the process of cutting out a glass plate, you may be equipped with the process of packing and transporting a glass original plate.

In this way, in order to generate|occur|produce defect information, the place which performs the defect inspection of a glass original plate, and the place which cuts a glass plate from a glass original plate can be set as a mutually separated place. For example, the former may be performed at a domestic factory, and the latter may be performed at an overseas factory. In this case, the communication speed between the first server and the second server tends to be slow, but since cutout classification information and quality information are transmitted from the first server to the second server except for the defect information, even if the communication speed of the network line is slow, the Transfer from the first server to the second server can be performed stably.

In the step of calculating the quality information of the above configuration, the first server may obtain the quality information by computation.

When the first server calculates the quality information in this way, it is possible to reduce the equipment cost compared to the case where the other server calculates the quality information. In addition, compared with the case of calculation in each computer used for inspection of defects or marking of identification information, an application program that calculates quality information can be updated at once, and maintainability can be improved.

The process of cutting out the glass plate of the said structure WHEREIN: When it is requested|required based on the 2nd cutout division information different from the cutout division information acquired from the 2nd server, a 2nd server with identification information The second cutout classification information is transmitted to the first server, and the first server reads second quality information indicating whether the quality for each classification of the second cutout classification information has been passed or not based on the defect information corresponding to the identification information. You may make it compute and obtain and transmit it to a 2nd server.

In this way, even when it is requested to cut the glass plate based on the second cutout classification information different from the cutout classification information acquired from the second server in the step of cutting the glass plate, the defect information is not moved to the second server. and can respond only by exchanging a small amount of information between the first server and the second server.

(Effects of the Invention)

According to the present invention as described above, it is possible to efficiently manufacture a glass plate from the glass original plate by reducing the server load in which the information regarding the glass original plate is memorized.

BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows the manufacturing method of a glass plate.
2 is a schematic plan view showing a molding process.
3A is a diagram for explaining cutout classification information.
3B is a diagram for explaining cutout classification information.
3C is a diagram for explaining cutout classification information.
It is a schematic plan view which shows a machining process.
5 is a diagram illustrating an example of quality information displayed on a display device.

One Embodiment of the manufacturing method of the glass plate by this invention is demonstrated.

As shown in FIG. 1, the manufacturing method of the glass plate by this embodiment is equipped with shaping|molding process S1 of a glass original plate, transport process S2 of a glass original plate, and processing process S3 of a glass original plate. In the forming step S1, communication is performed with the first server 1 and the network 2 (eg, intranet), and in the machining step S3, the second server 3 and the network 4 (eg, intranet) are communicated. communicate through The first server 1 and the second server 3 communicate via a network 5 . The network 5 for communicating between the first server 1 and the second server 3 may be a dedicated line (including both wireless and wired), but is preferably the Internet (especially VPN). For example, the 1st server 1 is put in the factory which performs shaping|molding process S1, and the 2nd server 3 is put in the factory which performs the machining process S3.

As shown in Fig. 2 , the forming step S1 includes a cutting step S11 in which a glass ribbon continuously formed by the overflow down-draw method is cut to a predetermined length in a vertical posture to produce a glass original plate G as a forming original plate. do. In cutting process S11, a glass ribbon is adjusted by cutting by bending stress. In addition, shaping|molding process S1 is not limited to what used the overflow down-draw method. For example, you may use other down-draw methods, such as a slot down-draw method and a re-draw method, and a float method.

Further, the forming step S1 is a defect inspection step S12 of inspecting the defects of the glass original plate G after the cutting step S11, a marking step S13 of attaching identification information to the glass original plate G, and packing the glass original plate G Packing process S14 is provided. In this embodiment, in shaping|molding process S1, glass original plate G is conveyed in a vertical attitude|position (preferably vertical attitude|position) toward the right from the left of FIG. During this conveyance, for example, the glass original plate G is suspended and supported by a chuck mechanism or the like. Moreover, you may convey the glass original plate G in a horizontal attitude|position (preferably horizontal attitude|position) with a conveyor etc.

Defect inspection process S12 is equipped with process S12a of measuring the kind (for example, a bubble, a foreign material, etc.), a position (coordinate), and size of the defect contained in the glass original plate G by the sensor 6. In this embodiment, defect inspection process S12 is process S12b of measuring the skewness of glass original plate G with the sensor 7 before process S12a, and the process of measuring the root (stripe) of glass original plate G with the sensor 8. S12c is further provided. In addition, the order of process S12a - S12c is not specifically limited. In defect inspection process S12, the defect information containing the inspection result of these processes S12a - S12c is produced|generated, and it transmits to the 1st server 1 . In addition, you may abbreviate|omit process S12b and process S12c.

On the other hand, in the first server 1, as shown in Fig. 1, the defect information is linked to the identification information of the glass original plate G and stored in the first database 1a, and based on the defect information, the glass original plate ( The cutout classification information and quality information of G) are automatically obtained by calculation (simulation). Here, the cutout division information is layout information which shows how to cut out 1 sheet or the glass plate Ga of several sheets from the glass original plate G of 1 sheet. In addition, the quality information is judgment result information (consisting of information indicating pass and information indicating failure) indicating whether or not the quality for each cutout division included in the cutout division information is passed. One division corresponds to the part used as one glass plate (Ga).

3A to 3C , the first server 1 has a plurality of different types of patterns in advance as candidates for cutout classification information. For example, there are three patterns: single chamfer in FIG. 3A, trimming in FIG. 3B, and multi-chamfer (eg, hexagonal chamfer) in FIG. 3C. Among these patterns, optimal cutout classification information is automatically selected in consideration of the location or size of a defect included in the defect information. As the cutout classification information, it is preferable to select a pattern that minimizes the amount of glass waste. In this embodiment, the glass original plate G without a defect becomes a single chamfer, and the glass original plate G with a defect is trimmed or multi-chamfered in consideration of the position, size, etc. of a defect. Candidate patterns of cutout classification information can be added, edited, or deleted.

As shown in FIG. 3A , in the case of single chamfering, a rectangular division C1 is selected as cutout division information except for the peripheral portion of the glass original plate G. As shown in FIG. Although the size of the division C1 is preset, it is also possible to change it.

As shown in FIG. 3B, in the case of trimming, any one of the starting points P1 to P4 formed in the vicinity of the four corners of the glass original plate G except for the peripheral edge of the glass original plate G is a corner. A division of a rectangular shape with , is selected as cutout division information. Therefore, information on the selected starting points P1 to P4 is also included in the cutout classification information. For example, when there are defects d1 and d2 in the glass original plate G, the rectangular division C2 including the starting point P1 is cut out so as not to include the defects d1 and d2. It is selected as identification information. The size of the division C2 is preset, but it is also possible to change it.

As shown in FIG. 3C , in the case of multi-chamfering, the division of a plurality of rectangular shapes of the same size disposed adjacent to each other in the region except for the peripheral edge of the glass original plate G is selected as cutout division information. For example, in the case of hexagonal chamfering, divisions C3 to C8 are selected as cutout division information. In this case, in the quality information, the quality of the classification (C3, C5, C7) in which the defect (d3~d5) exists is regarded as rejected, and the quality of the classification (C4, C6, C8) in which the defect does not exist is regarded as pass. information is included. The number of divisions (C3 to C8) (number of multi-chamfers) is preset, but can be changed.

The first server 1 associates the cutout classification information and quality information obtained by calculation with the identification information of the glass original plate G, and stores it in the first database 1a. In addition, the first server 1 transmits the cutout classification information and quality information together with the identification information to the second server 3 . The second server 3 associates these information with identification information and stores them in the second database 3a. Thereby, the cutout classification information and the quality information stored in the second database 3a are in a state in synchronization with the cutout classification information and the quality information stored in the first database 1a. At this time, the defect information is not transmitted from the first server 1 to the second server 3, but is excluded from the synchronization information. Accordingly, the first server 1 stores detailed information including defect information, cutout classification information, and quality information, and the second server 3 stores simple information including cutout classification information and quality information except for the defect information. information is remembered. Further, the cutout classification information and quality information transmitted from the first server 1 to the second server 3 may be only difference information between the cutout classification information and the quality information stored in the second server 3 . .

Again, if we return to FIG. 2 and explain, in the marking process S13, ineffective parts, such as the periphery of the glass original plate G, in the marking device 9 (for example, the part which is cut and removed at the time of cutting) attach identification information to The identification information is ID information of the glass original plate G, and is affixed to the glass original plate G in the form of, for example, a two-dimensional code (preferably a data matrix code) or the like. As a method of attaching identification information by the marking device 9, labeling, laser processing, inkjet printing, etc. are used, for example. When inkjet printing is used, it is preferable to use an ink containing no metal component.

In packing process S14, two or more pieces of glass original plate G are laminated|stacked on the pallet 10, and it packs. At this time, you may classify|categorize the glass original plate G suitably based on cutout classification information as needed. The lamination operation is performed by humans or robots. In this embodiment, although the pallet 10 which laminates|stacks the glass original plate G in a vertical orientation is used, you may use the pallet which laminates|stacks the glass original plate G in a horizontal orientation. In the case of the vertical posture, the angle formed by the horizontal plane is preferably 45° to 80°, and more preferably 60° to 75°, as for the posture of the glass disk G. In the case of the horizontal posture, the angle formed by the horizontal plane is preferably 0° (horizontal posture) to 30°, and more preferably 0° to 15°, as for the posture of the glass disk G. In these cases, it is preferable to interpose a protective sheet (not shown), such as paper (paper) or a foamed resin sheet, between each of the glass original plates G. In FIG. 2, the pallet 10 and the glass original plate G packed on the pallet 10 are shown as a side view for convenience of description.

When the said packing process S14 is complete|finished, the glass original plate G packed by the pallet 10 will be transported to processing process S3 (transport process S2). Transportation includes at least one of land transportation, air transportation, and sea transportation.

As shown in FIG. 4, processing process S3 is reading process S31 which scans identification information X pasted on glass original plate G, and cutting process S32 which cuts glass plate Ga which is mother glass from glass original plate G. And, the selection process S33 which selects the glass plate Ga is provided. In this embodiment, in processing process S3, although the glass original plate G is conveyed by the horizontal attitude|position (preferably horizontal attitude|position) toward the right from the left of FIG. 4, you may convey it in a vertical attitude|position. In this embodiment, although the case where processing process S3 is given and demonstrated to the glass original plate G taken out from the pallet 10 as an example is mentioned and demonstrated, it is not limited to this. The operation of taking out the glass original plate G from the pallet 10 is performed by a human or a robot. In FIG. 4, the pallet 10 and the glass original plate G packed on the pallet 10 are shown as a side view for convenience of description.

In the reading step S31 , the scanned identification information is transmitted to the second server 3 , and cutout classification information and quality information corresponding to the identification information are acquired from the second server 3 .

The cutting step S32 is a step S32a of forming a scribe line L on the glass original plate G based on the cutout classification information acquired from the second server 3, and the glass original plate G along the scribe line L. A step S32b of bending and breaking is provided. In step S32a, the scribe line L is formed by pressurization by a wheel cutter, irradiation of a laser, or the like. Step S32b includes a step of bending and breaking the glass original plate G along a scribe line L extending in a first direction parallel to the transport direction of the glass original plate G, and a second direction perpendicular to the transport direction. A step of bending and breaking the glass original plate (G) along the scribe line (L) is separately provided. In addition, FIG. 4 illustrates the case where the acquired cutout division information was the information which instruct|indicates cutting out the glass plate Ga of 4 sheets from the glass original plate G of 1 sheet.

Here, in the scribing mechanism used in the cutting step S32 and the bending and breaking mechanism, a candidate pattern of cutout classification information is registered in advance. When a person depresses a selection switch of a pattern corresponding to the cutout division information acquired from the second server 3, processing corresponding to the cutout division information acquired from the second server 3 is automatically performed. Moreover, you may make it a scribing mechanism or a bending and breaking mechanism directly acquire cutout division information from the 2nd server 3, and you may make it automatically select the processing corresponding to cutout division information from a registration pattern.

In addition, in cutting process S32, you may cut|disconnect the glass original plate G by laser cutting or laser melting.

In sorting process S33, based on the quality information acquired from the 2nd server 3, a non-defective quality is sorted out from the cut out glass plate Ga. When the selection process S33 is performed by a person, it is preferable to arrange the display device 11 and display the quality information. As shown in FIG. 5 , in the display device 11 , for example, “○” is displayed in a category in which the quality is pass, and “X” is displayed in a category in which the quality is unpassed, for example. In addition, you may perform selection process S33 automatically by a robot. In this case, the display device 11 may be omitted. A defect-free glass plate (mother glass) Ga regarded as a non-defective product is sold to a customer who manufactures a liquid crystal display device or the like.

According to the configuration as described above, the server for managing various types of information is divided into the first server 1 and the second server 3 . Detailed information including defect information, cutout classification information, and quality information is stored in the first server 1, and only simple information including cutout classification information and quality information except for the defect information is stored in the second server 3 this is remembered In processing step S3, various types of information are not directly acquired from the 1st server 1, but only the simple information acquired from the 2nd server 3 is used. Therefore, in the processing step S3, an excessive load is not applied to the first server 1, and since the information acquired from the second server 3 is only simple information, an excessive load is placed on the second server 3 There is nothing that takes Therefore, since the state which can acquire the information required for a process smoothly from the 2nd server 3 can be stably maintained, it becomes possible to manufacture the glass plate Ga efficiently from the glass original plate G. In addition, when the operator of machining process S3 restricts (prohibits) access to the 1st server 1, the operator of machining process S3 cannot access the defect information memorize|stored only in the 1st server 1. In this way, the risk of leaking highly confidential defect information can be reduced.

In addition, this invention is not limited to the structure of the said embodiment, nor is it limited to the above-mentioned effect. Various modifications are possible in the present invention without departing from the gist of the present invention.

Although the case where identification information is attached to the glass original plate G was demonstrated in the said embodiment, you may stick identification information to the accessory (for example, a pallet etc.) of the glass original plate G. In this case, it is possible to identify the glass original plate (G) according to the identification information and the loading position of the accessory (pallet). Further, the cutout division information and quality information obtained by calculation may be directly pasted on the glass original plate G. Since the amount of information is very small compared to defect information, these pieces of information can be included in, for example, a two-dimensional code. In this case, since the cutout division state and quality information can be read directly from the identification information pasted on the glass original plate G in processing process S3, communication with the 2nd server 3 can be reduced or abbreviate|omitted.

In the above embodiment, the first server 1 calculates and obtains cutout classification information and quality information of the glass original plate G based on the defect information. It may be calculated on the computer used in

Although the said embodiment demonstrated the case where glass original plate G is cut according to the cutout division information acquired from the 2nd server 3 in processing process S3, the cut acquired from the 2nd server 3 in processing process S3 You may cut|disconnect the glass original plate G based on cutout division information (2nd cutout division information) different from the out division information. In this case, it is preferable to set it as the following structure. That is, the second server 3 transmits the second cutout classification information to the first server 1 together with the identification information of the glass original plate G required to be cut according to the second cutout classification information. Next, the first server 1 recalculates and obtains the second quality information indicating whether the quality for each division of the second cutout division information has passed based on the defect information corresponding to the identification information. Then, the first server 1 transmits the second quality information to the second server 3 . In this way, without transmitting the defect information to the second server 3, only a small exchange of information between the first server 1 and the second server 3 is required to change the cutout information in the machining step S3. can respond to

Although the said embodiment demonstrated the case where mother glass is cut out from a shaping|molding original board, this manufacturing method is similarly applicable also when cutting out the glass substrates for final products, such as for liquid crystal display devices, from mother glass.

1 first server 1a first database
3 2nd server 3a 2nd database
G Glass original plate (forming original plate) Ga Glass plate (mother glass)
S1 forming process S11 cutting process (regulation)
S12 Defect Inspection Process S13 Marking Process
S14 packing process S2 transport process
S3 Machining Process S31 Reading Process
S32 cutting process (fidelity) S33 sorting process

Claims (5)

A process of generating defect information by inspecting the defects of the glass original plate;
A step of obtaining cutout classification information of the glass original plate based on the defect information and quality information indicating whether or not the quality for each classification is passed by calculation;
a step of concatenating the defect information, the cutout classification information and the quality information with the identification information of the glass original plate and storing it in a first database of a first server;
transmitting the cutout classification information and the quality information excluding the defect information from the first server to a second server and storing them in a second database of the second server;
obtaining the cutout classification information and the quality information corresponding to the identification information of the glass original plate from the second server;
A step of cutting out one or a plurality of glass plates from the original glass plate based on the cutout classification information acquired from the second server;
The manufacturing method of the glass plate characterized by including the process of classifying|selecting a good product from the said glass plate based on the said quality information acquired from the said 2nd server. The method of claim 1,
After the process of generating the said defect information and before the process of cutting out the said glass plate, the process of packing and transporting the said glass original plate is provided, The manufacturing method of the glass plate characterized by the above-mentioned. 3. The method according to claim 1 or 2,
The process which calculates|requires the said quality information by calculation WHEREIN: The said 1st server calculates|requires the said quality information by calculation, The manufacturing method of the glass plate characterized by the above-mentioned. 3. The method according to claim 1 or 2,
The process of cutting the said glass plate WHEREIN: When it is requested|required based on the 2nd cutout division information different from the said cutout division information acquired from the said 2nd server, the said 2nd server is the said identification transmits the second cutout classification information together with the information to the first server, and the first server passes the quality for each classification of the second cutout classification information based on the defect information corresponding to the identification information The manufacturing method of the glass plate characterized by re-calculating and calculating|requiring the 2nd quality information which shows whether or not, and transmitting to the said 2nd server. 4. The method of claim 3,
The process of cutting the said glass plate WHEREIN: When it is requested|required based on the 2nd cutout division information different from the said cutout division information acquired from the said 2nd server, the said 2nd server is the said identification transmits the second cutout classification information together with the information to the first server, and the first server passes the quality for each classification of the second cutout classification information based on the defect information corresponding to the identification information The manufacturing method of the glass plate characterized by re-calculating and calculating|requiring the 2nd quality information which shows whether or not, and transmitting to the said 2nd server.

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