CN114302865A - Method for producing sheet glass and apparatus for producing sheet glass - Google Patents
Method for producing sheet glass and apparatus for producing sheet glass Download PDFInfo
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- CN114302865A CN114302865A CN202080059179.1A CN202080059179A CN114302865A CN 114302865 A CN114302865 A CN 114302865A CN 202080059179 A CN202080059179 A CN 202080059179A CN 114302865 A CN114302865 A CN 114302865A
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- sheet glass
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- scribe line
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- 239000005357 flat glass Substances 0.000 title claims abstract description 156
- 238000004519 manufacturing process Methods 0.000 title claims description 42
- 238000005520 cutting process Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims description 34
- 230000008859 change Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 description 19
- 238000005452 bending Methods 0.000 description 16
- 239000011521 glass Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000005336 cracking Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/03—Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/002—Precutting and tensioning or breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/04—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/033—Apparatus for opening score lines in glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/037—Controlling or regulating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
When a scribe line (S) is formed on the front surface side of the boundary between a first region (G1) and a second region (G2) of a sheet glass (G) and the sheet glass (G) is cut along the scribe line (S), and when a back surface support member (3) is in a state of supporting the back surface (Gy) of the first region (G1), a flat surface section (5a) of a press-fitting member (5) is rotated while being in contact with the front surface (Gx) of the second region (G2), and the second region (G2) is pressed toward the back surface (Gy) side, thereby cutting the sheet glass (G) along the scribe line (S).
Description
Technical Field
The present invention relates to an improvement in a manufacturing technique of a sheet glass including a technique of cutting the sheet glass along a score line.
Background
As is well known, plate glasses are used in various fields, including glass substrates for displays such as liquid crystal displays, plasma displays, and organic EL displays, cover glasses for organic EL lighting, and the like. In manufacturing such a plate glass, a step of cutting out a small plate glass from a large plate glass, a step of trimming an edge portion of the plate glass along the edge, and the like are performed. In these steps, the following is generally performed: after the plate glass is formed into the scribing line, the plate glass is cut along the scribing line.
As a specific example of such a method of cutting a plate glass, a method disclosed in patent document 1 can be mentioned. In the method disclosed in this document, after forming a scribe line on the front surface of a plate glass, the back surface of a first region (region on the side of the scribe line) of the plate glass is supported in advance by a back surface support member. Then, in this state, the roller (rolling body) is pressed into the back surface side while rolling along the surface of the second region (the region on the other side of the scribe line) of the sheet glass. By the press-fitting operation of the roller, bending stress is applied to the vicinity of the scribe line, and the sheet glass is cut along the scribe line.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-226549
Disclosure of Invention
Problems to be solved by the invention
However, when the sheet glass is cut using the roller as disclosed in patent document 1, the following problems occur due to point contact or line contact between the roller and the sheet glass.
That is, the plate glass before cutting may be warped. When the roller presses the sheet glass having the warp toward the back surface side, the roller is in point contact or line contact with a portion of the sheet glass protruding in association with the warp, and therefore a pressing force from the roller locally acts on the second region of the sheet glass. Therefore, the bending stress cannot be uniformly applied to the vicinity of the scribe line of the plate glass, and proper cutting along the scribe line is hindered. As a result, a problem occurs in that a large amount of glass frit is scattered due to chipping (improper cracking at the cut end face) at the cut portion of the plate glass.
As shown in fig. 4 (b) of this document, when the sheet glass is pressed toward the back surface side by the roller, the second region of the sheet glass is bent and deformed over the entire range. In this state, in order to apply sufficient bending stress to the vicinity of the scribe line of the sheet glass, it is necessary to increase the moving distance of the roller (downward moving distance in the drawing) and to generate bending deformation with a large curvature over the entire range. As a result, there is a possibility that the time required for the cutting operation may be prolonged, and the mechanism for moving the roller may be increased in size.
From the above viewpoint, an object of the present invention is to suitably perform a pressing operation of a sheet glass to a back surface side at the time of cutting, and to suitably cut the sheet glass along a scribe line.
Means for solving the problems
A first aspect of the present invention made to solve the above problems is a method for manufacturing a sheet glass, including a cutting step of forming a scribe line on a surface side of a boundary portion between a first region and a second region of the sheet glass and cutting the sheet glass along the scribe line, wherein in the cutting step, when a back surface support member supports a back surface of the first region, a flat surface portion of a press-fitting member is pressed into the back surface side while rotating in a state of being in contact with a surface of the second region, thereby cutting the sheet glass along the scribe line. The plate glass is preferably 500 μm or less in thickness, and more preferably 300 μm or less in thickness. In addition, the plate glass preferably has flexibility.
According to this method, the flat surface portion of the press-fitting member is in contact with the surface of the second region of the plate glass when the surface is flat, and is in contact with the surface at a plurality of locations when the surface has projections, recesses, and the like. Therefore, when the flat surface portion of the press-fitting member is rotated in a state of being in contact with the surface of the second region of the plate glass and the second region is pressed toward the back surface side, the contact area between the flat surface portion and the second region is increased. Therefore, even if the glass plate is warped, the pressing force applied to the second region from the flat surface portion of the pressing member is dispersed, and the warping of the plate glass is corrected, and the pressing force is less likely to be locally applied. Thereby, the bending stress is uniformly applied to the vicinity of the scribing line, and the sheet glass can be appropriately cut. As a result, defects such as cracking at the cut portion of the plate glass and scattering of a large amount of glass frit can be avoided. In this case, the warpage of the plate glass is particularly effective if the plate glass is warped by a scribe line and an arbitrary virtual straight line parallel to the scribe line on the surface of the plate glass. Further, according to this method, when the flat surface portion of the press-fitting member presses the second region toward the back surface side, the second region is not bent and deformed over the entire range so that the press-fitting region becomes flat over a wide range, and a contact portion of the second region with the flat surface portion and a portion from the contact portion to the scribe line have a shape close to a flat shape. As a result, the vicinity of the scribe line in the second region is formed into a shape close to a bent shape, that is, a shape bent with a large curvature, and a sufficient bending stress acts thereon, so that the press-fitting member moves a short distance toward the back side, and the sheet glass can be cut. This also enables the plate glass to be appropriately cut along the scribe line, and the time required for the cutting operation to be shortened, the mechanism for moving the press-fitting member to be compact, and the like to be achieved.
In the method, it is preferable that the planar portion is rotated about an axis extending in a direction along the scribing line. Here, the above-mentioned "axis extending in the direction along the scribe line" means an axis extending in the direction along the scribe line formed in a state where the plate glass is not warped (hereinafter, the same applies).
In this way, the planar portion of the press-fitting member can be appropriately rotated gradually while maintaining the state in which the planar portion is in contact with the surface of the second region as it is. More specifically, when the axis line which is the rotation center of the flat surface portion does not extend along the scribe line, the contact state between the flat surface portion and the second region may be unbalanced, and the surface of the second region may be damaged or bending stress may be unevenly applied in the vicinity of the scribe line. However, according to the structure herein, such a disadvantage is appropriately avoided.
In this method, the axis may be moved in parallel in a direction in which the planar portion pushes the second region toward the back surface side.
In this way, the planar portion of the press-fitting member can be more appropriately rotated while maintaining the state of contact between the planar portion and the surface of the second region with a simple structure.
In this method, the angle of the planar portion may change in accordance with a change in the angle of a contact portion where the second region is in contact with the planar portion, the change being caused by the planar portion pressing the second region to the back surface side.
In this way, when the planar portion of the press-fitting member presses the second region toward the back surface side, even if the angle (inclination angle) of the contact portion of the second region with the planar portion changes, the angle of the planar portion follows the changed angle of the second region. This can always maintain the contact state between the press-fitting member and the second region in a preferable state.
In the above method, in the cutting step, the plate glass may be suspended and supported such that the scribe line is oriented in the vertical direction.
In this way, the above-described operational effects in the case where the plate glass is warped can be remarkably obtained. More specifically, when the glass sheet is cut while being placed on a surface plate or the like in a flat position, the glass sheet undergoes less warpage, but when the glass sheet is suspended and supported as in the configuration described above, the warpage increases. In this case, as described above, the warp of the plate glass can be appropriately coped with, and therefore the effect of the operation is particularly remarkable.
In the above method, the rear surface of the second region may be held by suction in the cleaving step.
In this way, since the warpage of the plate glass can be reduced by the suction holding of the rear surface of the second region, uniform bending stress can be applied to the vicinity of the scribe line more reliably. Further, since the second region separated from the first region continues to be sucked and held after the cutting, the second region can be conveyed to the retracted position without dropping, and disposal, collection, and the like can be smoothly performed.
In the above method, the flat surface portion may be in contact with a surface of a portion of the second region including an end edge portion facing the scribe line.
In this way, when the sheet glass is cut using the roller as disclosed in patent document 1, a problem caused by the contact of the roller with the edge portion can be avoided. That is, the edge portion (referred to as an ear portion) of the plate glass is thicker than the central portion of the plate glass and has irregularities formed on the surface. Therefore, when the roller is press-fitted into the second region in a state of point contact or line contact with the end edge portion, the contact state between the end edge portion and the roller may vary depending on the press-fitting position, and the roller may be shaken between the two to cause improper cutting. In contrast, even if the second region is pushed in with the flat surface portion in contact with the end edge portion, the contact state between the flat surface portion and the end edge portion is less likely to change, and therefore, the rattling is less likely to occur between the flat surface portion and the end edge portion, and the cutting can be performed satisfactorily. In addition, even when the dimension of the second region in the width direction orthogonal to the scribe line is narrow, the cutting can be performed satisfactorily with the flat surface portion in contact with the end edge portion.
In the above method, the press-fitting member may be a plate-like member having one of two surfaces opposed in a plate thickness direction as the flat surface portion, and the plate-like member may be detachably held by a belt roller member having a roller rotatable around an axis extending in a direction along the scribing line.
In this way, the press-fitting of the second region by the plate-like member and the press-fitting of the second region by the roller can be used separately according to the degree of warp of the sheet glass. More specifically, when there is a possibility that the warp of the plate glass may adversely affect the cutting, the plate-like member is pressed into the second region. On the other hand, in the case where the warpage of the sheet glass is not a problem, the sheet-like member is removed from the belt roller member and is pressed into the second region by the roller. This makes it possible to combine the advantages described above in the case of press-fitting with a plate-like member and the advantages in the case of press-fitting with a roller. In the case of press-fitting the plate glass to such an extent that the warpage does not become a problem, advantages in the case of press-fitting with the roller include an advantage that the surface of the second region is hardly damaged at the time of press-fitting, an advantage that the structure of a mechanism for moving the roller is simplified, and the like.
A second aspect of the present invention made to solve the above problems is an apparatus for manufacturing a sheet glass, comprising a cutting device for cutting a sheet glass having a scribe line formed on a surface side of a boundary portion between a first region and a second region along the scribe line, the apparatus comprising: a back surface support member that supports a back surface of the first region; and a press-fitting member that is formed with a flat surface portion that presses the second region to the back surface side while rotating in contact with the surface of the second region, so as to cut the sheet glass along the scribe line.
According to this manufacturing apparatus, as in the case of the above-described manufacturing method, the plate glass can be appropriately cut, occurrence of chipping, scattering of a large amount of glass powder, and the like at the time of cutting can be avoided, and shortening of the operation time required for cutting, compactness of the mechanism for moving the press-fitting member, and the like can be realized.
Effects of the invention
According to the present invention, the press-fitting operation of pressing the plate glass to the back surface side at the time of cutting is performed well, and the plate glass is appropriately cut along the scribing line.
Drawings
Fig. 1 is a perspective view showing a cleaving apparatus included in a sheet glass manufacturing apparatus according to an embodiment of the present invention.
Fig. 2a is an enlarged schematic bottom view of a main part of a cutting apparatus included in a sheet glass manufacturing apparatus according to an embodiment of the present invention, as viewed from below.
Fig. 2b is an enlarged schematic bottom view of a main part of the cutting apparatus included in the apparatus for manufacturing sheet glass according to the embodiment of the present invention, as viewed from below.
Fig. 3a is a schematic side view of a cleaving apparatus included in the apparatus for manufacturing sheet glass according to the embodiment of the present invention, viewed from the side.
Fig. 3b is an enlarged schematic bottom view of a main part of the cutting apparatus included in the apparatus for manufacturing sheet glass according to the embodiment of the present invention, as viewed from below.
Fig. 4a is a schematic bottom view showing a cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 4b is a schematic bottom view showing a cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 4c is a schematic bottom view showing a cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 5a is a schematic bottom view showing a first modification of the cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 5b is a schematic bottom view showing a first modification of the cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 6 is a schematic bottom view showing a second modification of the cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 7 is a schematic bottom view showing a third modification of the cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Fig. 8 is a schematic bottom view showing a fourth modification of the cleaving step included in the method for manufacturing a sheet glass according to the embodiment of the present invention.
Detailed Description
Hereinafter, a method and an apparatus for manufacturing a plate glass according to an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a perspective view illustrating a cleaving apparatus 1 included in a sheet glass manufacturing apparatus according to an embodiment of the present invention. As shown in the figure, the plate glass G has a scribe line S formed on the front surface side (one side of the reference numerals Ga and Gx) as a boundary, and one side in the width direction (the arrow a direction side) thereof is defined as a first region G1, and the other side in the width direction (the arrow B direction side) thereof is defined as a second region G2. In this embodiment, first region G1 becomes the product portion and second region G2 becomes the non-product portion. However, both the first region G1 and the second region G2 may be product portions. In the illustrated example, the scribe line S does not reach the upper end and the lower end of the sheet glass G, but may reach the upper end and the lower end.
The plate glass G is suspended and supported so that the scribe line S faces in the vertical direction. The plate thickness of the plate glass G can be set to 200 to 2000 μm, for example. The smaller the thickness, the more likely warpage occurs, and the greater the warpage that occurs, the more pronounced the effect of correcting warpage in the invention described below, and therefore the thickness is preferably 500 μm or less, more preferably 300 μm or less. Further, the sheet glass G is preferably flexible. In this embodiment, the plate glass G is warped. The warp is curved in a shape of a scribe line S in the surface of the sheet glass G and an arbitrary imaginary straight line parallel to the scribe line S.
The cleaving apparatus 1 cleaves the sheet glass G along the scribing line S by bending stress. In detail, the cleaving apparatus 1 includes: a holding mechanism 2 for suspending the support plate glass G; a rear surface support member 3 that supports the rear surface Gb side of the first region G1; an adsorption mechanism 4 that adsorbs and holds the back surface Gy side of the second region G2; and a press-fitting member 5 that presses the second region G2 toward the back surface Gy side while rotating in the arrow C direction in a state of being in contact with the front surface Gx of the second region G2. In this embodiment, the press-fitting member 5 is a plate-shaped member having one of two surfaces facing each other in the plate thickness direction as a flat surface portion 5a that comes into contact with the surface Gx of the second region G2 (see fig. 2 b).
The gripping mechanism 2 moves the glass sheet G in the width direction while gripping the upper end portion of the first region G1. The gripping mechanism 2 is slidably held by a guide rail (not shown) extending in the width direction above the glass sheet G. When the step of cutting the sheet glass G is performed, the gripping mechanism 2 and the sheet glass G are in a stopped state. The gripping means 2 may be disposed at a plurality of locations in the width direction at the upper end of the first region G1.
The rear surface support member 3 is disposed on the rear surface Gb side of the end of the first region G1 on the scribe line S side. The distance L1 between the back support member 3 and the scribe line S in the width direction is, for example, 10 to 30mm, preferably 10 to 20mm (see fig. 4 a). In this embodiment, the rear surface support member 3 is a columnar body or a plate-like body (a flat plate) having a flat support surface for supporting the rear surface Gb of the first region G1 and being long in the vertical direction. The shape of the back support member 3 may be a round bar shape or the like. The back support member 3 extends vertically from the upper end Gd and the lower end Ge of the first region G1, but may have a length not reaching the upper end Gd and the lower end Ge.
The adsorption mechanism 4 includes: a holding base material 6 which is long in the vertical direction; and a plurality of (5 in the drawing) adsorption pads 7 which are mounted at equal intervals in the longitudinal direction of the holding base 6. The holding base material 6 is configured to move by the operation of a driving mechanism (not shown) such as a robot arm. The suction pad 7 is formed of an elastic member such as rubber or resin that can expand and contract, and sucks the back surface Gy of the second region G2 with negative pressure.
The plate-like member 5 as the press-fitting member is disposed on the surface Gx side of the second region G2. The distance L2 between the plate-like member 5 and the scribe line S in the width direction is, for example, 80 to 160mm (see FIG. 4 a). The separation distance L2 is the separation distance before the second region G2 is pressed in. In this embodiment, the plate-like member 5 is a flat plate elongated in the vertical direction and vertically protrudes from the upper end Gf and the lower end Gg of the second region G2, but may have a length not reaching the upper end Gf and the lower end Gg.
A belt roller member 8 for detachably holding the plate-like member 5 is disposed on the front side of the plate-like member 5. The belt roller member 8 includes: a roller shaft 9 extending in a direction along the scribing line S; a plurality of (5 in the drawing) rollers 10 arranged at equal intervals in the axial direction of the roller shaft 9; and a support body 11 that supports the roller shaft 9. The scribe line S is a scribe line in the case where the plate glass G is not warped at all. In this embodiment, the plate-like member 5 is connected to the roller shaft 9 using a binding band 12. The binding band 12 can be wound and unwound across the plate-like member 5 and the roller shaft 9, whereby the plate-like member 5 can be attached to and detached from the roller member 8. The support body 11 is configured to move by the operation of a driving mechanism (not shown) such as a robot arm, and the belt roller member 8 moves in synchronization with the plate-like member 5.
Fig. 2a and 2b are bottom views of the plate-like member 5 viewed from below. As shown in fig. 2a, each roller 10 is in contact with the surface (in a planar shape) of the plate-like member 5 facing the flat surface portion 5a, and presses the plate-like member 5. The plate-like member 5 is configured to rotate around the roller shaft 9 while maintaining contact with the rollers 10 at the same position as shown by the chain line in the figure. Therefore, a roller shaft 9 (strictly speaking, an axis 9a which is the center of the roller shaft 9) which is the rotation center of the flat surface portion 5a of the plate-like member 5 is present at a position separated from the plate-like member 5 to the front side. The distance L3 between the axis 9a of the roller shaft 9 and the plate-like member 5 (the radius of the roller 10) is, for example, 10 to 30 mm.
As shown in fig. 2b, the plate-like member 5 moves straight to the back side in the direction D while maintaining contact with the roller 10. The D direction is a direction orthogonal to the surface Gx of the second region G2. The surface Gx of the second region G2 referred to herein is the surface Gx before the breaking step of the second region G2 in the case where no warpage is present at all. As shown by the chain line in the figure, when the roller 10 moves straight in the direction D, the angle of the flat surface portion 5a of the plate-like member 5 changes following the change in the angle of the second region G2. Here, the planar portion 5a of the plate-like member 5 is relatively moved to the side closer to the scribing line S by a distance L6 with a change in angle based on the movement path Z of the roller shaft 9 (the axis 9 a). Therefore, the contact position where the planar portion 5a contacts the second region G2 is also moved by the distance L6 toward the side closer to the scribe line S with respect to the movement path Z of the roller shaft 9. In this case, if the roller 10 directly contacts the surface Gx of the second region G2 as disclosed in patent document 1, the contact position a at which the roller 10 contacts the second region G2 is relatively moved to the side close to the scribe line S by a distance L7 shorter than the above-described distance L6.
The planar portion 5a of the plate-like member 5 is formed of a material that is less likely to damage the surface Gx of the second region G2. Therefore, the flat surface portion 5a is preferably formed of resin or the like. Further, the plate-like member 5 preferably has moderate flexibility. Specifically, the plate-like member 5 preferably has rigidity similar to or higher than that of the plate glass G and flexibility. From these viewpoints, the plate-like member 5 is preferably a porous resin plate or a foamed resin plate typified by a plastic corrugated board or a PP foamed board.
Next, a method for manufacturing a plate glass using the manufacturing apparatus configured as described above will be described.
First, in the step on the upstream side of the position shown in fig. 1, the scribing line S is formed on the surface Gx of the sheet glass G by pressing with a wheel cutter, irradiation of laser light, or the like in a state where the sheet glass G is suspended and supported by the holding mechanism 2. Next, the glass sheet G on which the scribing line S is formed is conveyed in the width direction while being suspended and supported by the holding mechanism 2, and is stopped. At the time when the sheet glass G stops, as shown in fig. 1, the back surface support member 3 moves toward the front side and contacts the back surface Gy of the first region G1 of the sheet glass G. Further, the belt roller member 8 moves toward the back side, so that the flat surface portion 5a of the plate-like member 5 contacts the surface Gx of the second region G2. Then, the holding base material 6 of the adsorption mechanism 4 moves to the front side, and the adsorption pad 7 adsorbs the back surface Gy of the second region G2.
Then, the planar portion 5a of the plate-like member 5 is gradually pushed toward the back surface Gy side while maintaining the surface contact with the surface Gx of the second region G2. At this stage, the periphery of the surface contact portion Gw where the second region G2 is in surface contact with the planar portion 5a of the plate-like member 5 has a flat shape with almost no warpage in the side view shown in fig. 3a and the bottom view shown in fig. 3b (the form depicted by the solid line). In this case, if the roller 10 is brought into direct contact with the surface Gx of the second region G2 as disclosed in patent document 1, the roller 10 is brought into point contact or line contact with a portion of the sheet glass G protruding with warpage, as shown by a chain line in fig. 3b, for example, and the vicinity of the contact portion b of the second region G2 with the roller 10 is locally greatly recessed. The local depressions are important factors for causing an improper deformation in a wide range of the second region G2. Therefore, it is difficult to generate uniform bending stress in the vicinity of the scribing line S at the time of cutting the sheet glass G. On the other hand, when the planar portion 5a of the plate-like member 5 is in surface contact with the surface Gx of the second region G2, the periphery of the surface contact portion Gw in which the second region G2 is in surface contact with the planar portion 5a is flat, and hence no undue deformation occurs over a wide range of the second region G2. As a result, in the case of cutting the plate glass G, bending stress acts more uniformly in the vicinity of the scribe line S than in the case disclosed in patent document 1, and occurrence of chipping, scattering of a large amount of glass frit, and the like is less likely to occur. Note that the back surface Gy of the second region G2 is sucked and held by the suction pad 7, and therefore an effect of further reducing the warp of the sheet glass G is obtained. However, since the suction pad 7 has a characteristic of being easily deformed such as being expanded and contracted, the warpage of the sheet glass G cannot be sufficiently reduced only by the suction pad 7, and the reduction of the warpage is assisted.
Fig. 4a, 4b, and 4c illustrate a process of gradually cutting the sheet glass G by pressing the second region G2 toward the rear surface Gy side while rotating the planar portion 5a of the plate-like member 5 in time series. First, as shown in fig. 4a, the belt roller member 8 is moved so that the flat surface portion 5a of the plate-like member 5 comes into surface contact with the surface Gx of the second region G2. At this time, the roller 10 is in contact with the plate-like member 5, and both the plate-like member 5 and the holding base material 6 are in a non-inclined state (a state parallel to the surface Ga of the first region G1). This state will be referred to as an initial state hereinafter.
Next, as shown in fig. 4b, the roller 10 and the roller shaft 9 are linearly moved (parallel moved) in the direction D, and the flat surface portion 5a of the plate-like member 5 is rotated around the roller shaft 9 (the axis 9a) while being in surface contact with the surface Gx of the second region G2. Thereby, the sheet glass G is flexed with the rear surface support member 3 as a starting point. At this time, the angle of the flat surface portion 5a of the plate-like member 5 changes following the change in the angle of the surface Gx of the second region G2. In this process, since the second region G2 has a shape that is nearly flat from the surface contact portion Gw that is in surface contact with the planar portion 5a of the plate-like member 5 to the scribe line S, the vicinity of the scribe line S of the second region G2 has a shape that is nearly bent, i.e., a shape that is curved with a large curvature. Here, a bending line W indicated by a chain line in the figure depicts a shape when the surface Gx of the second region G2 is flexed in a case where the roller 10 directly contacts the surface Gx of the second region G2 as disclosed in patent document 1. In this bending line W, the vicinity of the scribing line S of the second region G2 is bent with a small curvature. Therefore, when the planar portion 5a of the plate-like member 5 is in surface contact with the roller 10, the bending stress acting in the vicinity of the scribe line S in the second region G2 becomes larger than in the case where the roller is in direct contact with the planar portion. In addition, in this process, the planar portion 5a of the plate-like member 5 slides on the surface Gx of the second region G2, and the relative position with respect to the second region G2 moves to the side separated from the scribe line S. In contrast, the relative position of the adsorption pad 7 with respect to the second region G2 does not change.
Thereafter, the roller 10 and the roller shaft 9 further move straight in the direction D, and the flat surface portion 5a of the plate-like member 5 further pushes the second region G2, so that the sheet glass G is cut along the scribe line S at a timing when the bending stress acting in the vicinity of the scribe line S becomes sufficiently large, as shown in fig. 4 c. In this case, as described with reference to fig. 4b, when the second region G2 is flexed, the region from the surface contact portion Gw of the second region G2 to the scribe line S has a nearly flat shape. Therefore, even if the distance for linearly moving the roller 10 in the D direction is short, the sheet glass G can be cut. This shortens the time required for cutting the sheet glass G, improves the work efficiency, and also makes the mechanism for moving the belt roller member 8 compact. After the sheet glass G is cut and the second region G2 is separated from the first region G1, the second region G2 does not fall down, but is maintained in a state of being sucked and held by the suction pad 7. After the second area G2 is conveyed to the retracted position where it does not affect the first area G1, the suction by the suction pads 7 is released, and the second area G2 is dropped and collected.
Instead of the above-described exemplary configuration, the flat surface portion 5a of the plate-like member 5 may be in contact with the surface Gx of the second region G2 including the end edge Gz facing the scribe line S, as shown in fig. 5 a. More specifically, the end edge Gz (a portion called an ear portion) of the second region G2 has a larger thickness than other portions of the second region G2 and has irregularities formed in the vertical direction (the depth direction in the drawing). Therefore, when the roller is brought into contact with the end edge Gz of the second region G2 or the surface Gx in the vicinity thereof as disclosed in patent document 1, there is a possibility that the roller and the end edge Gz may come into unstable contact during the straight movement of the roller in the direction D and rattle between the roller and the end edge Gz. On the other hand, when the flat surface portion 5a of the plate-like member 5 contacts a portion including the end edge portion Gz, even if the plate-like member 5 is moved straight in the direction D, the contact state between the flat surface portion 5a of the plate-like member 5 and the end edge portion Gz is stable, and thus, the rattling or the like is less likely to occur therebetween. In the sheet glass G shown in fig. 5a, the width-directional dimension of the second region G2 is short. Such a narrow width of the second region G2 can be accommodated by bringing the flat surface portion 5a of the plate-like member 5 into contact with the surface of the end edge portion Gz and extending the flat surface portion 5a of the plate-like member 5 from the end edge portion Gz in the illustration.
As shown in fig. 5b, if the plate-like member 5 is made flexible, the flat surface portions 5a of the plate-like member 5 can be brought into surface contact with no gap or a slight gap in the range from the end edge Gz to the vicinity of the second region G2. More specifically, if the plate-shaped member 5 has higher rigidity than the plate glass G and the plate-shaped member 5 has flexibility, the plate-shaped member 5 itself is deformed after the second region G2 is deformed as shown in the figure.
In the case of cutting a plate glass having a smaller or no warpage than the plate glass G described above, the structure of the plate glass manufacturing apparatus and manufacturing method of the present invention can be modified as described below. That is, first, the binding band 12 of the band roller member 8 is detached, and the plate-like member 5 is removed. Thereafter, as shown in fig. 6, the roller 10 is brought into rollable contact with the surface Gx of the second region G2, and the back surface Gy of the second region G2 is suction-held by the suction pad 7. This state is set as an initial state. Then, from this initial state, the roller 10 is moved straight in the direction D, thereby flexing the second region G2 as in the state shown in fig. 4b described above. In this process, the roller 10 rolls on the surface Gx of the second region G2 by friction generated between the roller 10 and the second region G2, and the relative position of the roller 10 with respect to the second region G2 is moved in the direction of separating from the scribe line S along with this. Then, the deflection of the second region G2 becomes large, and the sample glass G is cut off in the state shown in fig. 4c described above when the bending stress acting on the scribe line S becomes a sufficient magnitude.
The apparatus and method for manufacturing a plate glass of the present invention can be applied not only to a case where the plate glass G is cut at one portion but also to a case where the plate glass G is cut at two portions as described below. That is, as shown in fig. 7, the center region in the width direction of the sheet glass G is set as a first region G1, the scribe lines S are formed on both sides thereof, and the outer regions in the width direction of each scribe line S are set as second regions G2. The belt roller members 8 are disposed on the front surface Gx side of each second region G2, and the suction mechanisms 4 are disposed on the back surface Gy side of each second region G2. The rear surface support members 3 are disposed on the rear surface Gb side at both ends in the width direction of the first region G1. In this case, with reference to each belt roller member 8, the center side in the width direction is the arrow a direction side in fig. 1 and both outer sides in the width direction are the arrow B direction sides in fig. 1. On the premise of these, substantially the same operation as the above-described operation is performed on both sides of the sheet glass G in the width direction, and substantially the same effect as the above-described effect is obtained.
In the apparatus and method for manufacturing sheet glass of the present invention, the following configuration can be adopted in order to rotatably support the flat surface portion 5a of the plate-like member 5. That is, as shown in fig. 8, a shaft 14 serving as a rotation center of the flat surface portion 5a of the plate-like member 5 is inserted through a bracket 13 fixed to the front side of the plate-like member 5, and the shaft 14 is supported by a bracket 16 fixed to the back side of a support body 15. Thereby, the flat surface portion 5a of the plate-like member 5 can rotate about the shaft 14 (axis 14 a). The support body 15 moves in the direction D perpendicular to the surface Gx of the second region G2 in the initial state by the operation of a drive mechanism such as a robot arm. Alternatively, another mechanism may be employed in which the flat surface portion 5a of the plate-like member 5 is rotatable about a shaft supported by the support body 15.
In the above embodiment, the roller shaft 9 (the shaft 14) is configured to be linearly moved in the direction D perpendicular to the surface Gx of the second region G2 in the initial state, but instead, the roller shaft 9 may be configured to be linearly moved in an oblique direction at an angle to the direction D. The roller shaft 9 (shaft 14) may be moved along a curved track such as a circular track around the vicinity of the back surface support member 3 or the vicinity of the scribe line S or a track similar to the circular track. The roller shaft 9 (shaft 14) and the holding base material 6 may be moved along the same curved track (for example, the curved track described above).
In the above embodiment, the warp of the sheet glass G is a shape in which the scribe line S and any virtual straight line parallel to the scribe line S in the surface of the sheet glass G are curved, but may be a warp having a shape different from this.
In the above embodiment, the plate glass G is suspended and supported in the vertical posture, but the plate glass G may be laid horizontally in the horizontal posture (preferably, horizontal posture). In this case, the lower surface of the sheet glass G is supported by the rear support member 3, and the upper surface of the second region G2 of the sheet glass G is pressed toward the lower surface side (downward) by the plate-like member 5. The upper surface of the sheet glass G may be supported by the rear support member 3, and the lower surface of the second region G2 of the sheet glass G may be press-fitted to the upper surface side (upward) by the plate-like member 5. The posture of the plate glass G may be an inclined posture inclined with respect to a vertical plane or a horizontal plane.
In the apparatus and method for manufacturing sheet glass of the present invention, the width dimension L4 (unit: mm, see fig. 2a) of the plate-like member 5 is preferably 30% or more, more preferably 50% or more, and most preferably 70% or more, in percentage to the width dimension (mm) of the second region G2 of the sheet glass G. This can facilitate the formation of a curved shape with a large curvature in the vicinity of the scribe line in the second region. On the other hand, the upper limit of the width-directional dimension L4 of the plate-like member 5 can be set to 90%, for example. The longitudinal dimension L5 (unit: mm, see fig. 3a) of the plate-like member 5 may be, for example, 70% or more in percentage to the longitudinal dimension (mm) of the plate glass G, or may be 100% or more as shown in fig. 3 a. The thickness T of the plate-like member 5 can be set to 5 to 15mm, for example.
In the apparatus and method for manufacturing sheet glass of the present invention, the press-fitting member that comes into contact with the surface Gx of the second region G2 is not limited to the plate-like member 5. For example, the press-fitting member may be a columnar member having a cross section formed of a semicircle, a triangle, a quadrangle, or another polygon, or a member having a three-dimensional shape other than these, as long as it has a flat surface portion. Further, the press-fitting member may not be a single member elongated in the vertical direction, and a plurality of press-fitting members may be arranged in the vertical direction. However, in this case, it is necessary to configure the plurality of press-fitting members to rotate around the same axis at the same radius.
Description of the reference numerals
1 apparatus for producing sheet glass (cutting apparatus)
3 Back support Member
5 plate-like Member (Press-in Member)
5a plane part
7 adsorption pad
8-belt roller member
9 roll shaft
9a axis
10 roller
14 shaft
14a axis
G plate glass
G1 first region
G2 second region
Surface of Ga first region
Back side of Gb first region
Surface of the second region of Gx
Back of Gy second region
End edge part of Gz plate glass
And S, scribing.
Claims (9)
1. A method for manufacturing a plate glass, comprising a cutting step of forming a scribe line on a surface side of a boundary portion between a first region and a second region of the plate glass and cutting the plate glass along the scribe line,
the method for producing a sheet glass is characterized in that,
in the cutting step, when the back surface support member is in a state of supporting the back surface of the first region, the flat surface portion of the press-fitting member is rotated in a state of being in contact with the surface of the second region and the second region is press-fitted to the back surface side, thereby cutting the plate glass along the scribing line.
2. The method for producing a sheet glass according to claim 1,
the planar portion rotates about an axis extending in a direction along the score line.
3. The method for producing a sheet glass according to claim 2,
the axis line moves in parallel in a direction in which the planar portion pushes the second region toward the back surface side.
4. The method for producing a sheet glass according to claim 3,
the angle of the planar portion changes in accordance with a change in the angle of a contact portion where the second region contacts the planar portion, the change being caused by the planar portion pressing the second region to the back surface side.
5. The method for producing a sheet glass according to any one of claims 1 to 4,
in the cutting step, the plate glass is suspended and supported so that the scribe line is directed in the vertical direction.
6. The method for producing a sheet glass according to any one of claims 1 to 5,
in the cutting step, the back surface of the second region is held by suction.
7. The method for producing a sheet glass according to any one of claims 1 to 6,
the flat surface portion is in contact with a surface of a portion of the second region including an end edge portion opposed to the scribe line.
8. The method for producing a sheet glass according to any one of claims 1 to 7,
the press-fitting member is a plate-like member having the planar portion formed on one of two surfaces opposed to each other in a plate thickness direction, and the plate-like member is detachably held by a belt roller member having a roller rotatable around an axis extending in a direction along the scribing line.
9. A plate glass manufacturing device is provided with a cutting device for cutting plate glass with a scribing line formed on the surface side of a boundary part of a first region and a second region along the scribing line,
the apparatus for manufacturing a sheet glass is characterized in that,
the cleaving device includes: a back surface support member that supports a back surface of the first region; and a press-fitting member that is formed with a flat surface portion that presses the second region to the back surface side while rotating in contact with the surface of the second region, so as to cut the sheet glass along the scribe line.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019185419A JP7336071B2 (en) | 2019-10-08 | 2019-10-08 | Sheet glass manufacturing method and its manufacturing apparatus |
| JP2019-185419 | 2019-10-08 | ||
| PCT/JP2020/034941 WO2021070579A1 (en) | 2019-10-08 | 2020-09-15 | Method for producing plate glass and production device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114302865A true CN114302865A (en) | 2022-04-08 |
Family
ID=75381764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080059179.1A Pending CN114302865A (en) | 2019-10-08 | 2020-09-15 | Method for producing sheet glass and apparatus for producing sheet glass |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7336071B2 (en) |
| KR (1) | KR20220079515A (en) |
| CN (1) | CN114302865A (en) |
| WO (1) | WO2021070579A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023002006A (en) * | 2021-06-22 | 2023-01-10 | 日本電気硝子株式会社 | Method for producing plate glass, apparatus for producing plate glass, and plate glass |
| WO2023210143A1 (en) * | 2022-04-26 | 2023-11-02 | 日本電気硝子株式会社 | Glass plate manufacturing method and glass plate manufacturing device |
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| JP2009173516A (en) * | 2008-01-25 | 2009-08-06 | Samsung Corning Precision Glass Co Ltd | Apparatus for breaking glass substrate unified with process table |
| CN103347827A (en) * | 2011-06-07 | 2013-10-09 | 日本电气硝子株式会社 | Method for cutting plate-like glass, and cutting device therefor |
| CN103502162A (en) * | 2011-09-02 | 2014-01-08 | 日本电气硝子株式会社 | Device for cutting sheet glass |
| JP2017226549A (en) * | 2016-06-20 | 2017-12-28 | 日本電気硝子株式会社 | Manufacturing method of sheet glass and manufacturing apparatus of the same |
| CN108137373A (en) * | 2015-12-21 | 2018-06-08 | 日本电气硝子株式会社 | The manufacturing device of glass plate |
| CN108137372A (en) * | 2015-12-21 | 2018-06-08 | 日本电气硝子株式会社 | The manufacturing device of glass plate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09263417A (en) * | 1996-03-27 | 1997-10-07 | Bando Kiko Kk | Working device for glass plate and cracking device adequate for the same |
| JPH11171573A (en) * | 1997-08-25 | 1999-06-29 | Bando Kiko Kk | Cracking device for glass plate and press cracking head means used for the same |
| KR20120107722A (en) * | 2011-03-22 | 2012-10-04 | 삼성디스플레이 주식회사 | Substrate cutting apparatus and substrate cutting method using the same |
| TWI580651B (en) * | 2012-07-27 | 2017-05-01 | 日本電氣硝子股份有限公司 | Manufacturing method and manufacturing device of the same |
-
2019
- 2019-10-08 JP JP2019185419A patent/JP7336071B2/en active Active
-
2020
- 2020-09-15 CN CN202080059179.1A patent/CN114302865A/en active Pending
- 2020-09-15 KR KR1020227004507A patent/KR20220079515A/en not_active Application Discontinuation
- 2020-09-15 WO PCT/JP2020/034941 patent/WO2021070579A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009173516A (en) * | 2008-01-25 | 2009-08-06 | Samsung Corning Precision Glass Co Ltd | Apparatus for breaking glass substrate unified with process table |
| CN103347827A (en) * | 2011-06-07 | 2013-10-09 | 日本电气硝子株式会社 | Method for cutting plate-like glass, and cutting device therefor |
| CN103502162A (en) * | 2011-09-02 | 2014-01-08 | 日本电气硝子株式会社 | Device for cutting sheet glass |
| CN108137373A (en) * | 2015-12-21 | 2018-06-08 | 日本电气硝子株式会社 | The manufacturing device of glass plate |
| CN108137372A (en) * | 2015-12-21 | 2018-06-08 | 日本电气硝子株式会社 | The manufacturing device of glass plate |
| JP2017226549A (en) * | 2016-06-20 | 2017-12-28 | 日本電気硝子株式会社 | Manufacturing method of sheet glass and manufacturing apparatus of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7336071B2 (en) | 2023-08-31 |
| KR20220079515A (en) | 2022-06-13 |
| WO2021070579A1 (en) | 2021-04-15 |
| JP2021059476A (en) | 2021-04-15 |
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