TW201732273A - Glass plate manufacturing method - Google Patents

Abstract

A glass plate manufacturing method 1 is provided with: a machining step S2 of machining a glass plate; a cleaning step S3 of cleaning the glass plate machined in the machining step S2; and an inspection step S4 of detecting defects in the glass plate cleaned in the cleaning step S3. The inspection step S4 includes: a defect coordinate identifying step S4a of identifying defect coordinates; and a defect detail identifying step S4b of identifying the details of the defect at the coordinates identified in the defect coordinate identifying step S4a. The number of lines for implementing the defect detail identifying step S4b is greater than the number of lines for implementing the defect coordinate identifying step S4a, and the glass plates that have passed through the line for implementing the defect coordinate identifying step S4a are allocated to the lines for implementing the defect detail identifying step S4b.

Description

Glass plate manufacturing method

The present invention relates to a method for producing a glass sheet having an inspection process for detecting a defect of a glass sheet.

For example, the method for producing a glass plate such as a glass substrate for a liquid crystal display includes a process of processing a glass plate, a washing process for washing the glass plate processed in the processing, and In the inspection process of the defect inspection of the glass plate which has been washed in the above-described cleaning process (for example, refer to Patent Document 1). Among the defects of the glass plate detected during the inspection, for example, glass cullet, crack, foreign matter, dirt, poor processing, and the like are included.

[Practical Technical Literature] [Patent Literature]

[Patent Document 1] JP-A-2015-141096

However, in the inspection process, there is a specific case where the content of the defect is not only the presence or absence of the defect. However, if the content of a specific defect is simply intended, there is a problem that it takes a long time in the inspection process.

The present invention has been made in view of the above circumstances, and it is a technical object that the inspection time can be suppressed during the inspection of the defects of the glass sheet, and the content of the defect can be specified.

In order to solve the above problems, the inventor of the present invention focused on the results of the review and obtained the following knowledge. That is, in the case of checking the content of the process-specific defect, the inspection process may be divided into: a defect-specific process specific to the coordinates of the defect, and a defect-specific content of the defect of the coordinate to which the defect-specific process is specified. Specific process. In this case, in general, the defect content specific process takes more time than the defect coordinate specific process. Therefore, the number of production lines of the defect-specific process and the number of production lines of the defect-specific process are the same, and the glass plate that has completed the specific process of the defect coordinate must wait for the specific process of the defect content.

The method for producing a glass sheet according to the present invention, which has been created based on the knowledge, includes a processing process for processing a glass sheet, a washing process for washing the glass sheet processed in the processing, and the like. The inspection process of the defect inspection of the aforementioned glass plate after the cleaning process is cleaned, the foregoing inspection process is: a specific process of the defect coordinate specific to the coordinates of the defect, and a coordinate to be specified in the specific process of the aforementioned defect coordinate The specific content of the defect-specific defect-specific process, the number of production lines of the aforementioned defect-specific process is more than the number of production lines of the aforementioned defect-specific process, and the aforementioned glass plate of the production line that has passed the aforementioned defect-coordinate specific process is toward the aforementioned defect Production lines for content-specific processes are assigned.

According to this configuration, the number of production lines of the defect-specific process is more than the number of production lines of the defect-specific process, and the glass plate of the production line that has passed the defect-coordinate-specific process is assigned to the production line of the specific process of the defect content. Therefore, it is possible to avoid the fact that the glass plate of the specific process of the defective coordinate has been completed, and it is necessary to wait for the specific process of the defect content. Thus, the time required for the entire inspection process can be shorter than the number of production lines of the defective coordinate specific process and the number of production lines of the defect specific process. That is, according to the method for producing a glass sheet of the present invention, in the inspection process for detecting defects of the glass sheet, the inspection time can be suppressed, and the content of the defect can be specified.

In the above-described configuration, the glass sheet is conveyed in a non-contact manner in which the glass plate is floated in the intermediate portion in the orthogonal direction of the conveyance direction, and is conveyed while being supported by both end portions in the orthogonal direction. It is better to specify the coordinates of the defect.

With this configuration, since the coordinates of the defect are specified while the glass sheet is being conveyed, it can be shorter than the time required for the defect coordinate specifying process. Further, since the glass sheet is conveyed in a state of being non-contactly supported by the intermediate portion, it is possible to suppress occurrence of new defects in the glass sheet. In addition, since the glass plate is transported in a state where it is floated, it is difficult to deform the glass plate due to its own weight, and it is possible to accurately The coordinates of the trap are specific.

In the above-described configuration, in the above-described defect content specifying process, the content of the defect is preferably specified in a state in which the glass plate is supported and fixed in surface contact.

Since the glass plate is supported and fixed in a surface contact manner, the position of the glass plate is stabilized, and it is possible to more accurately align or focus on the image in which the specific process of the defect coordinate is specified.

In the above configuration, the number of production lines of the defect-specific process is preferably one to three more than the number of production lines of the defect-specific process.

As described above, according to the present invention, in the inspection process of detecting defects of the glass sheet, the inspection time can be suppressed, and the content of the defect can be specified.

1‧‧‧Manufacturing method

2‧‧‧Transportation agencies

2a‧‧‧Floating upper

2b‧‧‧Send out

3‧‧‧ glass plate

4‧‧‧Coordinate specific inspection device

4a‧‧‧Light source

4b‧‧‧Photography Department

5‧‧‧Support members

6‧‧‧Content-specific inspection device

6a‧‧‧Photography Department

6b‧‧‧Mobile agencies

R1‧‧‧1st conveyance road

R2‧‧‧2nd transport road

R3‧‧‧3rd Handling Road

S1‧‧‧Investment process

S2‧‧‧Processing process

S3‧‧‧ washing process

S4‧‧‧ inspection process

S4a‧‧‧ Defect coordinate specific process

S4b‧‧‧ Defective content specific process

S5‧‧‧Bundling process

[Fig. 1] A schematic view showing a method of producing a glass sheet according to an embodiment of the present invention.

[Fig. 2A] A schematic plan view showing a specific process of a defective coordinate.

[Fig. 2B] A schematic side view showing a specific process of the defective coordinates.

[Fig. 3A] A schematic plan view showing a specific process of the defect content.

[Fig. 3B] A schematic front view showing a specific process of the defect content.

Hereinafter, the form for carrying out the invention will be described with reference to the drawings.

Fig. 1 is a schematic view showing a method of manufacturing a glass sheet according to an embodiment of the present invention. The method for producing the glass sheet (hereinafter, only referred to as the production method 1) is a processor for performing, for example, end surface processing on the glass sheet. The glass plate manufactured by the manufacturing method 1 has a size of, for example, 300 × 300 mm to 3,500 × 3,500 mm, and its plate thickness is, for example, 0.1 to 1.1 mm.

The manufacturing method 1 includes an input process S1 for inputting a glass plate, a process S2 for processing the glass plate to be loaded in the input process S1, and a process for cleaning the glass plate processed in the process S2. The cleaning process S3 and the inspection process S4 of the defect inspection of the glass plate which has been washed in the cleaning process S3, and the packaging process S5 of the glass plate bundled with the defect detected in the inspection process S4 .

The inspection process S4 is a defect content specifying process S4b having a coordinate specific process S4a specifying the coordinates of the defect and a content of the defect of the coordinate to be specified in the defect coordinate specifying process S4a. Also, the number of production lines of the defective content specific process S4b is larger than the number of production lines of the defective coordinate specific process S4a, and the glass plate of the production line passing through the defective coordinate specifying process S4a is assigned to the production line of the defective content specific process S4b.

In the example of the figure, 1 containing the defect coordinate specific process S4a The strip production line is divided into three production lines containing the defect-specific process S4b. That is, the number of production lines of the defective coordinate specifying process S4a is one, the number of production lines of the defective content specific process S4b is three, and the number of production lines of the defective content specific process S4b is two more than the number of production lines of the defective coordinate specific process S4a.

Next, the process of the manufacturing method 1 will be described in order.

Initially, the glass plate was put in the process S1. Next, in the processing process S2, processing such as end surface processing (chamfering processing or the like) is performed on the glass sheet to be loaded in the input process S1. Further, in the washing process S3, the glass plate processed in the process S2 is washed by, for example, high-pressure water or a roller brush.

In the first conveyance path R1 from the cleaning process S3 to the defective coordinate specifying process S4a, the glass sheet 3 is automatically conveyed by the conveyance mechanism 2 shown in FIGS. 2A and 2B.

The transport mechanism 2 is a floating upper portion 2a that floats air in a state in which the glass plate 3 is floated by, for example, air ejection, and a delivery portion 2b such as a roller that feeds the glass plate 3 in contact with each other. The conveyance mechanism 2 is conveyed in a state in which the glass plate 3 is supported by the intermediate portion in the direction orthogonal to the conveyance direction and is supported by the both end portions in the direction orthogonal to the conveyance direction. The glass plate 3 is conveyed by the feeding portion 2b with the traction force in a state where the floating upper portion 2a floats on the floating upper portion 2a. In this conveyance, the glass sheet 3 functions to cancel the self-weight of the glass sheet 3 by the pressure of the air from the lower portion toward the vertical direction in the horizontal state, thereby maintaining a more natural shape (flat shape).

Next, in the defect coordinate specifying process S4a, the number of defects of the glass plate 3 is calculated, and the coordinates of the defect are specified.

As shown in FIG. 2A and FIG. 2B, in the defective coordinate specifying process S4a, after the first conveyance path R1, the number of defects of the glass plate 3 is carried out while the glass plate 3 is conveyed by the conveyance mechanism 2 The calculations and the specificity of the coordinates of the defect. At this time, the glass plate 3 is conveyed toward the delivery portion 2b while floating on the floating upper portion 2a.

In the defect coordinate specifying process S4a, the defect of the glass plate 3 is detected by the coordinate specifying inspection device 4, the number of defects is automatically calculated, and the coordinates of the defect are automatically specified. As shown in FIG. 2B, the coordinate-specific inspection device 4 includes an image pickup unit 4b such as a camera, which is disposed such that the light source 4a and the light source 4a face each other across the conveyance path of the glass sheet 3. The light source 4a is a wide area that is irradiated in a direction orthogonal to the conveyance direction of the glass sheet 3. The imaging unit 4b captures a wide area in a direction orthogonal to the conveyance direction of the glass sheet 3. In the coordinate specifying inspection device 4, the entire surface of the glass sheet 3 is imaged by the conveyance path of the glass sheet 3 in a state where the imaging unit 4b is fixed. The coordinate specifying inspection device 4 is a pattern that is imaged by light transmitted through the glass plate 3.

In the second conveyance path R2 from the defect coordinate specifying process S4a to the defect content specifying process S4b, the glass sheet 3 is automatically conveyed (contact conveyance) while being contacted by, for example, a roller conveyor belt. In the second conveyance path R2, the glass sheet 3 in which the defective coordinate specifying process S4a has been completed is automatically assigned to the defect content specifying process S4b.

Next, in the defect content specifying process S4b, the content of the defect of the coordinate is specified in accordance with the coordinates which are specified in the defect coordinate specifying process S4a.

As shown in FIG. 3A and FIG. 3B, in the defect content specifying process S4b, the content of the defect is specified in a state in which the glass plate 3 is supported and fixed in surface contact by the support member 5. In the defect content specifying process S4b, the defect of the glass plate 3 is imaged by the content specifying inspection device 6 based on the coordinate data of the defect transmitted from the coordinate specifying inspection device 4, and the content of the defect is specified.

The content-specific inspection device 6 includes, for example, an imaging unit 6a such as a microscope and a moving mechanism 6b such as an overhead for supporting the imaging unit 6a. In the state-specific inspection device 6, the glass plate 3 is fixed to the support member 5, and the image pickup unit 6a moves to capture the defects of the glass plate 3. The support member 5 is a type that does not transmit light, and the content specifying inspection device 6 captures light reflected by the glass plate 3. Further, the support member 5 ejects air to float the glass sheet 3 before positioning, but after positioning, the glass sheet 3 is adsorbed.

The specificity of the defect content may be that the image to be imaged may be judged by human vision, and the image data to be imaged may be automatically processed and automatically determined.

In the third conveyance path R3 from the end of the defect content specifying process S4b to the entry of the packing process S5, the glass sheet is automatically conveyed by contact, for example, by a roller conveyor.

Defect content specific process S4b, based on defect coordinates In the inspection result (the number of defects) of the specific process S4a and the inspection result (the content of the defect) of the defect content specifying process S4b, the determination of whether or not the glass plate 3 subjected to the inspection is good is performed by a determination unit (not shown).

The glass plate 3 judged to be good by the discrimination result by the determination unit is bundled as a good product in the packaging process S5. On the other hand, the glass plate 3 which is judged to be a defective product is bundled as a defective product.

According to the manufacturing method 1 of the present embodiment constructed as above, the number of production lines of the defect content specifying process S4b is more than the number of production lines of the defective coordinate specific process S4a, and the glass plate of the production line which has passed the defect coordinate specific process S4a is The production line of the defect content specific process S4b is assigned. Therefore, it is possible to avoid the fact that the glass sheet 3 of the defective coordinate specific process S4a has been completed, and it is necessary to wait for the defect content specific process S4b. Thus, the time required for the entire inspection process S4 can be made shorter than the case where the number of production lines of the defective coordinate specifying process S4a and the number of production lines of the defect content specifying process S4b are the same. That is, according to the method 1 for manufacturing a glass sheet of the present embodiment, in the inspection process for detecting defects of the glass sheet, the inspection time can be suppressed, and the content of the defect can be specified.

In other words, in the manufacturing method 1, the inspection process S4 is divided into: only the defect coordinate specific process S4a (short time) in which the position information and the defect are specified (short time), and the defect content specific (long time) Defect content specific process S4b. Further, the layout configuration in which the production line of the defect content specific process S4b required for the long time required in the process S4 is doubled is checked. Thereby, the processing capability of the inspection process S4 can be improved.

Further, during the period from the end of the cleaning process S3 to the defect coordinate specifying process S4a, since the back surface of the glass plate 3 is conveyed in a non-contact manner, it is possible to suppress occurrence of new defects on the surface of the glass plate 3. In addition, during the period from the end of the cleaning process S3 to the defect content specifying process S4b, the loading and unloading (supporting process) of the glass sheet 3, the movement of the upper and lower left and right glass sheets 3 for the conveyance direction conversion, and the posture change of the glass sheet 3 are not Work hard. Therefore, it is possible to suppress the occurrence of new defects in the glass sheet 3. According to the multiplication effect of these, in the manufacturing method 1, since the unnecessary defects are difficult, the yield is improved.

Further, by the air pressure corresponding to the own weight of the glass plate 3 by the conveyance mechanism 2, it is possible to suppress the deflection and deformation caused by the self-weight of the glass plate 3. As a result, the reliability of the inspection of the defective coordinate specifying process S4a performed by the conveyance mechanism 2 is improved.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea. For example, in the above embodiment, the assignment of the defect content specifying process S4b of the glass sheet 3 to the defective coordinate specifying process S4a is automatically performed toward the second conveying path R2, and is performed by a hand or a trolley. It can also be done. Further, in the above-described embodiment, the glass sheet 3 is automatically conveyed in the first conveyance path R1 and the third conveyance path R3 in the production line, but the glass plate 3 can be conveyed by a hand or a trolley. .

Further, in the above embodiment, the coordinate specifying inspection device 4 is a type that is imaged by light transmitted through the glass plate 3, but is made of glass. The pattern in which the light reflected by the panel 3 is imaged may also be used. In the above-described embodiment, the content-specific inspection device 6 is a type that captures light reflected by the glass plate 3, but may be imaged by light transmitted through the glass plate 3.

1‧‧‧Manufacturing method

R1‧‧‧1st conveyance road

R2‧‧‧2nd transport road

R3‧‧‧3rd Handling Road

S1‧‧‧Investment process

S2‧‧‧Processing process

S3‧‧‧ washing process

S4‧‧‧ inspection process

S4a‧‧‧ Defect coordinate specific process

S4b‧‧‧ Defective content specific process

S5‧‧‧Bundling process

Claims (4)

A method for producing a glass sheet, comprising: a processing process for processing a glass sheet; a washing process for washing the glass sheet processed in the processing step; and the washing of the glass sheet after the cleaning process The inspection process of the defect inspection of the glass plate is characterized in that the foregoing inspection process has a specific process of specifying the defect coordinate of the coordinate of the defect, and a defect specific to the content of the defect of the coordinate to be specified in the specific process of the aforementioned defect coordinate The content-specific process, the number of production lines of the aforementioned defect-specific process is more than the number of production lines of the aforementioned defect-specific process, and the aforementioned glass plate of the production line that has passed the aforementioned defect-coordinate-specific process is allocated to the production line of the specific process of the aforementioned defect content . The method for producing a glass sheet according to the first aspect of the invention, wherein in the defect coordinate specifying process, the glass sheet is non-contact-supported in the intermediate portion in the orthogonal direction of the conveying direction and two in the orthogonal direction When the end is in contact with the support, the coordinates of the defect are specified while being conveyed. The method for producing a glass sheet according to the first or second aspect of the invention, wherein the content of the defect is specified in a state in which the glass sheet is supported and fixed in a surface contact manner in the process of specifying the defect content. For example, the manufacturer of the glass plate of claim 1 or 2 The method wherein the number of production lines of the specific process of the defect content is 1 to 3 more than the number of production lines of the specific process of the defect coordinate.