TW202233534A - Method for producing glass film - Google Patents

Abstract

Provided is a method for producing a glass film, the method making it possible to prevent any decline in workability and to accurately cut a mother glass film along a planned cutting line without damaging the upper surface of the glass film. A method for producing a glass film G in which an initial crack D is formed in part of a planned cutting line L1 of a mother glass film MG in a state in which bending stress is applied to the planned cutting line L1, whereby the initial crack D is advanced along the planned cutting line L1 and the mother glass film MG is cut, the mother glass film being placed on a surface plate 2 that generates negative suction force on the upper-surface 2a side so that a protruding portion B, which is a portion where an end portion A of the mother glass film MG protrudes, is formed, and the planned cutting line L1 being provided in the protruding portion B.

Description

Manufacturing method of glass film

The present invention relates to a method for producing a glass thin film.

In recent years, flat panel displays such as liquid crystal displays, plasma displays, organic EL displays, and field emission displays have become popular as image display devices such as television receivers, replacing the previously popular CRT-type displays. In the plate glass used for these flat panel displays, the actual situation requires further thinning.

Patent Document 1 discloses a glass film (thin sheet glass) having a thickness of several hundreds of μm or less. As described in Patent Document 1, a method for producing a glass film includes forming an initial stage by a part of the planned cutting line in a state in which tensile stress (bending stress) is applied to the planned cutting line of the glass film (mother glass film). Cracks, a method in which the initial cracks are advanced along the predetermined cutting line to cut the glass film.

For example, the glass film described in patent document 1 is cut|disconnected by the glass film cutting apparatus provided with the conveyance roller for conveying a glass film. The glass film cutting device is constructed so that the end of the glass film sags due to its own weight when the glass film is cut. Thereby, since tensile stress acts on the planned cutting line, if an initial crack is formed in a part of the planned cutting line, the initial crack is advanced along the planned cutting line, and the glass film can be cut. This glass film cutting apparatus is not provided with a holding member for holding the posture of the glass film, but Patent Document 1 discloses another glass film cutting apparatus provided with a fixing member that presses the glass film from above. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2011-121791

[The problem to be solved by the invention]

Since the glass film cutting device provided with the above-mentioned conveyance roller is not provided with a holding member, the mother glass film cannot be maintained in the posture before and after cutting, and there is a possibility that the mother glass film cannot be cut along the planned cutting line with high accuracy. . Moreover, when holding by the said fixing member, it is necessary to arrange|position a mother glass film so that it may press from the upper direction by a fixing member, and there exists a possibility that workability|operativity may fall. Moreover, since the mother glass film is pressed from above, there is a possibility of damaging the upper surface of the glass film. Therefore, there has been a demand for a method for producing a glass film capable of accurately cutting a mother glass film along a predetermined cutting line without damaging the upper surface of the glass film while preventing a drop in workability.

An object of the present invention is to provide a method for producing a glass film capable of accurately cutting a mother glass film along a predetermined cutting line without damaging the upper surface of the glass film while preventing the reduction in workability. [means to solve the problem]

The problem to be solved by the present invention is as described above, and next, means for solving the problem will be described.

That is, in the method for producing a glass film of the present invention, an initial crack is formed in a part of the predetermined cutting line in a state where bending stress is applied to the predetermined cutting line of the mother glass film, and the above-mentioned initial crack is formed along the predetermined cutting line. A method of manufacturing a glass film in which the predetermined cutting line is advanced to cut the mother glass film, wherein a portion where the end of the mother glass film is out of range is formed on a platform that generates a negative pressure attraction force on the upper surface side. That is, the mother glass film is placed in the form of an overhang, and the predetermined cutting line is provided in the overhang.

According to the manufacturing method of the glass film of the present invention, the mother glass film is adsorbed on the table instead of being pressed from above by the fixing member or the like to maintain the posture of the mother glass film before and after cutting. Therefore, the reduction in workability can be prevented, and the mother glass film can be cut with high precision along the predetermined cutting line without damaging the upper surface of the glass film.

Moreover, in the manufacturing method of the glass thin film of this invention, it is preferable that the said initial crack is formed in the edge part of the said predetermined cutting line.

According to the manufacturing method of the glass thin film of the present invention, the initial crack can be formed from the side of the mother glass thin film. Therefore, when an initial crack is formed, it is possible to prevent the mother glass film from being crushed from above and nicked.

Moreover, in the manufacturing method of the glass film of the present invention, the mother glass film is bent by the bending stress, and the initial crack is preferably advanced by pressing the concave side of the bent mother glass film.

According to the manufacturing method of the glass film of the present invention, by arranging so that the concave side of the curved mother glass film becomes the lower surface of the glass film, the upper surface of the mother glass film is not pressed. Therefore, it is possible to prevent the mother glass film from being crushed from above and to be chipped, and to prevent the upper surface of the glass film from being damaged.

Furthermore, in the method for producing a glass thin film of the present invention, the crack forming member forms the initial crack in a part of the predetermined cutting line; Location is good.

According to the manufacturing method of the glass thin film of the present invention, initial cracks are easily formed in a part of the line to be cut. Therefore, the mother glass film can be cut with high precision along the predetermined cutting line.

Moreover, in the manufacturing method of the glass thin film of this invention, it is preferable to arrange|position a holding member on the concave side of the said protrusion part which bends by the said bending stress.

According to the manufacturing method of the glass film of the present invention, the protruding portion is bent so as to follow the holding member. Therefore, the mother glass film can be cut with high precision along the holding member.

Moreover, in the manufacturing method of the glass thin film of this invention, it is preferable to form a slit in the edge part of the said holding member.

According to the manufacturing method of the glass thin film of the present invention, by inserting the crack forming member into the slit, it is easy to form an initial crack in a part of the line to be cut. Therefore, the mother glass film can be cut with high precision along the predetermined cutting line.

Moreover, in the manufacturing method of the glass film of the present invention, it is preferable to set the position of the mother glass film on the table by setting the positioning member on the platform so that the mother glass film abuts on the positioning member.

According to the manufacturing method of the glass film of the present invention, the predetermined position of the mother glass film can be easily cut. Therefore, it becomes easy to cut a mother glass film so that it may become predetermined size.

Moreover, in the manufacturing method of the glass thin film of this invention, it is preferable that the cutting guide wire which becomes the mark which becomes the said cutting plan line is shown on the said holding member.

According to the manufacturing method of the glass film of the present invention, the mother glass film can be easily cut along the predetermined cutting line. Therefore, the mother glass film can be cut with high precision along the predetermined cutting line.

Moreover, in the manufacturing method of the glass film of the present invention, it is preferable that the mother glass film can be cut by advancing the initial crack along the predetermined cutting line on both sides holding the platform in the middle.

According to the manufacturing method of the glass film of the present invention, the dimension between the predetermined cutting lines on both sides of the intermediate holding platform becomes a predetermined dimension. Therefore, the mother glass film can be cut so as to have a predetermined size.

Moreover, in the manufacturing method of the glass film of the present invention, an exchangeable protective sheet is laid on the platform, and the mother glass film is preferably placed on the protective sheet.

According to the manufacturing method of the glass film of the present invention, an exchangeable protective sheet is laid on the platform, and even if the glass frit floats on the platform after cutting, the glass frit adheres to the protective sheet, the protective sheet can be exchanged, and it is easy to remove the glass from the protective sheet. Remove the glass frit from the platform. [Effect of invention]

As effects of the present invention, the following effects can be exhibited. That is, according to the manufacturing method of the glass film of the present invention, the mother glass film can be cut with high precision along the predetermined cutting line without damaging the upper surface of the glass film while preventing the reduction of workability.

Hereinafter, the first embodiment of the present invention will be described based on the attached drawings.

In the manufacturing method of the glass film G, the glass film cutting device 1 is used to cut the mother glass film MG. The thickness of the mother glass film MG (glass film G) is preferably 10 μm to 200 μm or more.

The structure of the glass film cutting device 1 will be described with reference to FIGS. 1 , 2 and 5 . The glass film cutting device 1 mainly includes a table 2 , a crack forming member 3 , a guide member 4 , a holding member 5 , and a positioning member 6 . In addition, in the present embodiment, the cut mother glass film MG has a rectangular shape.

As shown in FIGS. 1 and 2 , the stage 2 is one on which the mother glass film MG is placed. The table 2 has, for example, a rectangular top surface 2a, and a plurality of suction holes 2b are provided on the top surface 2a. The suction holes 2b are respectively communicated with negative pressure devices (not shown), and the inside of the suction holes 2b is maintained at a negative pressure by the negative pressure devices. Therefore, the mother glass film MG placed on the upper surface 2a of the stage 2 is held on the stage 2 by the suction force of the negative pressure generated by the suction hole 2b. When the upper surface 2a of the platform 2 is formed of a porous medium, the suction holes 2b may not be provided. Furthermore, the mother glass film MG is placed on the stage 2 so as to form a portion where the end A of the mother glass film MG protrudes from the stage 2, that is, the protruding portion B.

As shown in FIG. 5 , the crack-forming member 3 forms an initial crack D at a part of the planned cutting line L1 of the mother glass thin film MG. The crack forming member 3 forms the initial crack D at the end E of the planned cutting line L1, for example. The crack-forming member 3 is, for example, a rod-shaped file bar. It is preferable that the crack forming member 3 has a tapered shape. Thereby, by moving the crack forming member 3 upward from below, the end E of the line to be cut L1 can be cut without contacting the upper surface 2a side of the mother glass film MG. In addition, the direction in which the crack forming member 3 moves is not limited as long as it is a direction in which the initial crack D can be formed.

The guide member 4 guides the crack forming member 3 to the position where the initial crack D is formed. The guide member 4 is provided in one end portion 5 a of the holding member 5 . The guide member 4 is, for example, a plate shape, and is provided so as to guide the side surface of the crack-forming member 3 to be vertical. The guide member 4 is arranged so that the end E of the planned cutting line L1 is positioned above the side surface of the guide crack forming member 3 . Therefore, the crack forming member 3 can slide on the side surface of the guide member 4 which guides the crack forming member 3, and the initial crack D is formed at the end E of the planned cutting line L1.

The holding member 5 guides the protruding portion B of the mother glass film MG downward. As shown in FIG. 2 , the holding member 5 is arranged below the protruding portion B of the mother glass film MG, and is provided in parallel along the side surface of the stage 2 . The holding member 5 is arranged at a position lower than the upper surface 2a of the stage 2, and the mother glass film MG sucked by the suction hole 2b of the stage 2 is configured so that the mother glass film MG cannot be easily peeled off. The holding member 5 is formed of, for example, a fan-shaped member extending on one side of the cross-sectional view point, and is arranged so as to follow the outer peripheral surface of the curved convex portion B of the mother glass film MG. In addition, the holding member 5 is not limited to the present embodiment, and may be formed of, for example, an arc-shaped member extending from one of the cross-sectional viewpoints. Alternatively, the holding member 5 may be a hollow cylindrical body (tube) or a solid cylindrical body. Alternatively, the holding member 5 may be constituted by a plurality of rollers having a smaller diameter than the above-described cylindrical body. At this time, the plurality of rolls are arranged in the bending direction so as to follow the outer peripheral surface of the protruding portion B of the mother glass film MG that is curved in a convex shape. In addition, the rollers are rotatable around axes parallel to the side surfaces of the stage 2, respectively, and the friction with the protruding portion B of the mother glass film MG can be reduced. The holding member 5 is preferably formed of a resin material, and when it is formed of a metal, a resin foam sheet is preferably provided so as to cover the outer periphery thereof. The holding member 5 is shown along the axial direction of the holding member 5 by the cutting guide line L2 that becomes the mark of the planned cutting line L1 . The cutting guide wire L2 is shown at the center of the holding member 5, but may be shown covering both ends of the holding member 5, and the length is not limited. In addition, the holding member 5 is not necessarily required. As shown in FIG. 1 , a bending stress is applied to the planned cutting line L1 without using the holding member 5 by its own weight or by pressing the protruding portion B of the mother glass film MG downward. You can also.

The above-mentioned guide member 4 and holding member 5 are respectively disposed on opposite sides of the holding platform 2 . That is, on both sides facing each other while holding the platform 2, the guide member 4 can guide the crack forming member 3 to form the initial crack D at the end E of the planned cutting line L1, and the holding member 5 can be used to form the initial crack D. The protruding portion B of the mother glass film MG is guided downward. That is, the protruding portion B of the mother glass film MG is pressed upward by the holding member 5 due to the reaction of gravity.

The positioning member 6 is for determining the position of the mother glass film MG placed on the stage 2 . The positioning member 6 is configured so as to define the position of the mother glass film MG by abutting the end portion C adjacent to the end portion A in the mother glass film MG. The positioning member 6 is provided on the upper part of the side surface of the stage 2 orthogonal to the axial direction of the holding member 5 . The positioning member 6 is configured so as to define the position of the mother glass film MG so that the end portion C of the mother glass film MG protrudes from the end portion 5 a of the holding member 5 . The excess width from the end portion C of the mother glass film MG from the end portion 5a of the holding member 5 is preferably 1 mm to 10 mm. The positioning member 6 is, for example, a plate shape, and is provided so that the side surfaces on which the mother glass film MG abuts are vertical.

Next, the cutting method of the glass thin film G using the glass thin film cutting apparatus 1 comprised as mentioned above is demonstrated.

As shown in FIG. 3 , first, the operator places the mother glass film MG on the stage 2 so as to form the overhang portion B. As shown in FIG. At this time, the operator can position the mother glass film MG by bringing the end portion C of the mother glass film MG into contact with the positioning member 6 . In addition, the mother glass film MG is held on the stage 2 by the plurality of suction holes 2b. The mother glass film MG is positioned by the positioning member 6 so that the mother glass film MG protrudes from the end 5a of the holding member 5 to such an extent that the crack forming member 3 can abut from the side.

According to the manufacturing method of the glass film G of the present invention, the position of the mother glass film MG before and after cutting is maintained by suction on the table 2 instead of being fixed from above by a fixing member or the like. Therefore, the mother glass film MG can be cut with high accuracy along the planned cutting line L1 without damaging the upper surface of the glass film G while preventing the reduction of workability. Moreover, it becomes easy to cut a predetermined position of the mother glass film MG. Therefore, it is easy to cut the mother glass film MG so as to have a predetermined size. For example, it becomes easy to cut the mother glass film MG in a direction orthogonal to the extending direction of the end portion C of the mother glass film MG.

Next, as shown in FIG. 4 , the operator presses the protruding portion B downward so that the planned cutting line L1 and the cutting guide line L2 are aligned (see arrow F). Then, along with the downward movement of the protruding portion B, the holding member 5 presses the concave side of the mother glass film MG upward along the portion showing the cutting guide line L2. Thereby, the mother glass film MG is bent into a convex shape so as to follow the holding member 5 .

According to the manufacturing method of the glass film G of the present invention, the upper surface of the mother glass film MG is not pressed by the holding member 5 . Therefore, the upper surface of the glass film G can be prevented from being damaged. Also, the overhang portion B is bent so as to follow the holding member 5 . Therefore, the mother glass film MG can be cut with high accuracy along the portion showing the cutting guide line L2. In addition, it becomes easy to cut the mother glass film MG along the planned cutting line L1. Therefore, the mother glass film MG can be cut with high accuracy along the planned cutting line L1.

Next, as shown in FIG. 5 , the operator is in a state in which the mother glass film MG is bent into a convex shape along with the holding member 5 , that is, in a state in which bending stress is applied to the planned cutting line L1 , using the An initial crack D is formed at the position guided by the guide member 4 , that is, the end E of the planned cutting line L1 . Specifically, the operator moves the crack forming member 3 from below to above to cut the end E of the line to be cut L1 (see arrow H).

As shown in FIG. 6 , when the initial crack D is formed, the bending stress acting on the planned cutting line L1 causes the tearing force due to the stress concentration of the bending stress to act on the tip of the initial crack D, and the initial crack D will follow the The planned cutting line L1 is continuously advanced. Thereby, the mother glass film MG can be cut along the planned cutting line L1.

According to the manufacturing method of the glass thin film G of the present invention, the initial crack D is formed from the side of the mother glass thin film MG. Therefore, when the initial cracks D are formed, it is possible to prevent the mother glass film MG from being crushed from above and nicked. In addition, it becomes easy to form the initial crack D at the end E of the line L1 to be cut. Therefore, the mother glass film MG can be cut with high accuracy along the planned cutting line L1.

As described above, the holding member 5 and the guide member 4 are respectively provided on the opposite sides of the holding platform 2 . Therefore, the operator can cut the mother glass film MG along the predetermined cutting line L1 on both sides of the intermediate holding table 2 .

According to the manufacturing method of the glass film G of the present invention, the dimension between the planned cutting lines L1 on both sides of the intermediate holding platform 2 is a predetermined dimension. Therefore, the mother glass film MG can be cut so as to have a predetermined size.

In addition, in the above-mentioned embodiment, although the method performed by a worker has been illustrated, the method of the present invention is not limited to being performed by a worker. For example, it may be performed not by an operator but by a mechanical device such as a robot.

Next, the manufacturing method of the glass thin film G of 2nd Embodiment is demonstrated using FIG.7 and FIG.8. In the following, the names and symbols used in the description of the manufacturing method of the glass thin film G of the first embodiment are used to represent the same ones. Here, the description will be mainly focused on the difference in the manufacturing method of the glass thin film G of the first embodiment.

As shown in FIGS. 7 and 8 , the holding member 5 is fastened to the end portion 5 a of the holding member 5 to form a slit 5 b. The slit 5b is formed so that a groove parallel to the axial direction of the holding member 5 penetrates in the vertical direction, for example, and has a size capable of inserting the crack forming member 3 in the vertical direction. The mother glass film MG is arranged so that the end E of the line L1 to be cut is positioned above the slit 5b. Therefore, the crack forming member 3 can form the initial crack D at the end E of the planned cutting line L1 in a state of being inserted into the slit 5b. Furthermore, in this embodiment, since the slit 5b is formed, the cutting guide wire L2 provided on the holding member 5 may be omitted.

Next, the cutting method of the glass film G by the glass film cutting apparatus 1 comprised as mentioned above is demonstrated.

As shown in FIG. 8 , the operator is in a state in which the mother glass film MG is bent into a convex shape along with the holding member 5 , that is, in a state in which bending stress is applied to the planned cutting line L1 of the mother glass film MG , an initial crack D is formed at the position guided by the slit 5b, that is, the end E of the planned cutting line L1. Specifically, the operator moves the crack forming member 3 from below to the top with the crack forming member 3 inserted into the slit 5b to cut the end E of the planned cutting line L1 (see arrow J). At this time, it is preferable to guide the crack forming member 3 using the inner side surface 5c of the slit 5b as a guide portion.

According to the method of manufacturing the glass film G of the present invention, the mother glass film MG is easily cut by inserting the crack forming member 3 into the slit 5b to form the initial crack D at the end E of the planned cutting line L1. Therefore, the mother glass film MG can be cut with high accuracy along the planned cutting line L1.

Furthermore, after cutting both ends of the mother glass film MG by the glass film cutting device 1 of the second embodiment, the end portions of the mother glass film MG formed by cutting are brought into contact with the positioning members 6, so that it is possible to Both ends of the mother glass film MG are cut by the glass film cutting device 1 of the first embodiment. Thereby, the four sides of the mother glass film MG can be cut, and the mother glass film MG can be cut in a rectangular shape with a predetermined size.

In the above-mentioned embodiment, the mother glass film MG is directly placed on the upper surface 2a of the stage 2, however, a protective sheet not shown may be laid on the upper surface 2a of the stage 2, and the mother glass film MG may be placed on the protective sheet. . After the mother glass film MG is cut, the fine glass frit may fly, and the fine glass frit may adhere to the upper surface 2 a of the stage 2 . In the state where the glass frit is attached to the upper surface 2a of the table 2, the next mother glass film MG is placed, and when the mother glass film MG is adsorbed, the mother glass film MG is pressed against the glass frit. There is a risk of scratches on the surface. Even in such a situation, the glass frit can be easily removed by exchanging the protective sheet.

As the protective sheet laid on the upper surface 2a of the platform 2, resin films such as release paper, polyethylene terephthalate films, and resin foam sheets such as foamed polyethylene sheets can be preferably used. In particular, it is preferable to use a resin foam sheet as the protective sheet because of its cushioning properties. When using a non-breathable protective sheet such as a resin film or a resin foam sheet, it is preferable to form holes in the protective sheet so that the mother glass film MG can be attracted by the platform 2 . As the holes formed in the protective sheet, it is preferable to form holes with a diameter of 1 mm to 5 mm at intervals of 10 mm to 50 mm. The protective sheet may protrude from the upper surface 2a of the stage 2, but is preferably not laid on the holding member 5 in order to maintain the excellent cutting properties of the mother glass film MG.

The above-mentioned embodiment shows only a representative form, and various deformation|transformation can be carried out in the range which does not deviate from the outline of an embodiment. Furthermore, it is of course possible to implement in various forms, and the scope of the present invention is disclosed by the scope of the patent application, and also includes all modifications within the meaning and scope equivalent to the scope of the patent application.

1: Glass film cutting device 2: Platform 2a: Above the platform 2b: Attraction hole 3: Crack forming member 4: Guide member 5: Hold the components 5a: End of retaining member 5b: Gap 6: Positioning components A: The end of the mother glass film B: Exceeding part C: The end of the mother glass film D: initial crack E: End of scheduled cutting line G: glass film L1: Scheduled cutting line L2: Cut off the guide wire MG: mother glass film

[ Fig. 1 ] A perspective view of a stage on which the mother glass film is placed. [ Fig. 2] Fig. 2 is a perspective view of a glass film cutting device for explaining the method for producing a glass film according to the first embodiment of the present invention. [ Fig. 3] Fig. 3 is a schematic diagram for explaining the placement of the glass film on the platform, (a) is a schematic plan view, (b) is a schematic side view, and (c) is a schematic front view. [ Fig. 4 ] Schematic diagrams for explaining the pressing of the protruding portion to the lower side, (a) is a schematic plan view, (b) is a schematic side view, and (c) is a schematic front view. [ Fig. 5] Fig. 5 is a schematic diagram for explaining the formation of an initial crack, (a) is a schematic plan view, (b) is a schematic side view, and (c) is a schematic front view. [ Fig. 6 ] A schematic plan view for explaining the progression of the initial crack. [ Fig. 7] Fig. 7 is a perspective view of a glass film cutting device for explaining a method for producing a glass film according to a second embodiment of the present invention. [ Fig. 8] Fig. 8 is a schematic diagram for explaining the formation of an initial crack, (a) is a schematic plan view, (b) is a schematic side view, and (c) is a schematic front view.

1: Glass film cutting device

2: Platform

2a: Above the platform

2b: Attraction hole

A: The end of the mother glass film

B: Exceeding part

C: The end of the mother glass film

L1: Scheduled cutting line

MG: mother glass film

Claims (10)

A method for producing a glass film, comprising forming an initial crack in a part of the predetermined cutting line in a state where bending stress is applied to the predetermined cutting line of a mother glass film, and causing the initial crack to follow the predetermined cutting line A method of manufacturing a glass film for cutting the aforementioned mother glass film is developed, characterized in that: The mother glass film is placed on a platform that generates a negative pressure attraction on the upper surface side so as to form a portion where the end portion of the mother glass film exceeds the range, that is, an overhang portion, and the predetermined cutting line is provided in the overhang portion. The method for producing a glass thin film according to claim 1, wherein: The initial crack is formed at the end of the predetermined cutting line. The method for producing a glass thin film according to claim 1 or 2, wherein, The mother glass film is bent by the bending stress, and the initial crack is advanced by pressing the concave side of the bent mother glass film. The method for producing a glass thin film according to any one of claims 1 to 3, wherein, The crack forming member forms the aforementioned initial crack at a part of the aforementioned predetermined cutting line; The crack forming member is guided to the position where the initial crack is formed by the guide portion. The method for producing a glass thin film according to any one of claims 1 to 4, wherein, A holding member is arranged on the concave side of the overhang portion bent by the bending stress. The method for producing a glass thin film according to claim 5, wherein: A slit is formed at the end of the holding member. The method for producing a glass thin film according to claim 5, wherein: By setting the positioning member on the platform, the mother glass film abuts on the positioning member, and the position of the mother glass film on the platform is determined. The method for producing a glass thin film according to claim 7, wherein: The cutting guide wire which becomes the mark of the said predetermined cutting line is shown in the said holding member. The method for producing a glass thin film according to any one of claims 1 to 8, wherein, The mother glass film can be cut by propagating the initial crack along the predetermined cutting line between the two sides holding the platform in the middle. The method for producing a glass thin film according to any one of claims 1 to 9, wherein, Lay exchangeable protective sheets on the aforementioned platforms; The mother glass film is placed on the protective sheet.

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