KR20230078952A - Manufacturing method of glass roll - Google Patents

Abstract

In the conveying step of the method for manufacturing a glass roll, a suction conveying step in which the glass film before the cutting step is adsorbed and conveyed by an adsorption conveying device located upstream of the laser irradiation device in the conveying direction, and a suction conveying step installed between the laser irradiation device and the winding device A tension adjusting step of adjusting the tension acting on the glass film after the cutting step by means of a tension adjusting device is provided.

Description

Manufacturing method of glass roll

The present invention relates to a method of manufacturing a glass roll.

Since mobile terminals such as smart phones and tablet PCs, which are rapidly spreading in recent years, are required to be thin and lightweight, requests for thinning are also increasing on glass substrates mounted on these terminals. Under such development, a glass film that is a glass substrate thinned to a film shape (for example, thickness is 300 µm or less) has been developed and manufactured.

The manufacturing process of a glass film may include the process of manufacturing a glass roll by winding the strip-shaped base material glass film used as the background into a roll shape. For example, Patent Document 1 discloses a method for manufacturing a glass roll comprising a forming process, a lug portion removal process, a first winding process, a taking out process, a cutting process, and a second winding process. there is.

In this manufacturing method, first, in the forming step, the base material glass film is continuously formed by the overflow down-draw method. Next, in the lug portion removal step, the base glass film is irradiated with laser light from a laser irradiation device, and unnecessary lug portions located at both ends of the base glass film in the width direction are removed to form a first glass film. In a 1st winding-up process, a 1st glass roll is formed by winding up this 1st glass film with a winding core.

Thereafter, in the taking-out step, the first glass film is taken out from the first glass roll, and in the cutting step, the first glass film is irradiated with a laser beam from a laser irradiation device. Thereby, the edge part of the width direction of a 1st glass film is removed as an unnecessary part (non-product part), and a 2nd glass film is formed. Finally, a 2nd glass roll is manufactured by winding up a 2nd glass film with a winding core in a 2nd winding-up process.

Japanese Unexamined Patent Publication No. 2019-48734

In the manufacturing method of the above glass roll, in order to wind up the 2nd glass film with a winding core in a 2nd winding-up process, it is a state in which tension|tensile_strength was applied to the 2nd glass film.

In this case, if an excessive tension is applied to the second glass film, there is a risk of adversely affecting the upstream cutting process. That is, when an excessive tension is applied to the second glass film, vibration occurs in the second glass film at a position below the laser irradiation device on the upstream side, and there is a concern that cutting defects may occur.

The present invention was made in view of the above circumstances, and makes it a technical problem to prevent cutting defects of the glass film by adjusting the tension applied to the glass film.

The present invention is intended to solve the above problems, and includes a conveying step of conveying a glass film, a cutting step of cutting a part of the glass film by irradiating the glass film with a laser beam from a laser irradiation device, and the above described after the cutting step. In a glass roll manufacturing method including a winding step of winding a glass film into a roll shape by a winding device, the conveying step is performed by a suction conveying device located upstream of the laser irradiation device in the conveying direction, and the glass before the cutting step is performed. A suction conveyance step of conveying the film while adsorbing it, and a tension adjusting step of adjusting the tension applied to the glass film after the cutting step by means of a tension adjusting device installed between the laser irradiation device and the winding device. to be

According to this configuration, by adjusting the tension applied to the glass film after the cutting step by the tension adjusting step, it is possible to prevent excessive tension from acting on the glass film and to prevent vibration of the glass film during the cutting step. . It becomes possible to prevent the cutting defect of the glass film in a cutting process by this.

In this method, the tension adjusting device includes an air blowing device positioned above the glass film after the cutting step, and a support roller positioned below the air blowing device and supporting the lower surface of the glass film after the cutting step. In addition, the support roller may be constituted by a free roller.

According to this configuration, air is blown downward from the air blowing device, and this glass film can be pressed against the support roller by causing the air to contact the glass film after the cutting step supported by the support roller. This makes it possible to adjust the tension applied to the glass film.

In this method, the tension adjusting device may include a conveying roller that contacts the glass film after the cutting step to have a wrap angle, and the conveying roller may be a drive roller driven to rotate.

According to this structure, it becomes possible to adjust the tension|tensile_strength given to this glass film by adjusting the conveyance speed of the glass film after a cutting process with a conveyance roller.

In this method, the tension adjusting device may include a pair of rollers for sandwiching the glass film after the cutting step.

According to this structure, it becomes possible to adjust the tension|tensile_strength given to this glass film by pinching|interposing and conveying the glass film after a cutting process with a pair of rollers.

In this method, the tension adjusting step includes a first tension adjusting step, a second tension adjusting step performed after the first tension adjusting step, and a third tension adjusting step performed after the second tension adjusting step, The tension adjusting device includes a first tension adjusting device that performs the first tension adjusting process, a second tension adjusting device that performs the second tension adjusting process, and a third tension adjusting device that performs the third tension adjusting process. and the first tension adjusting device comprises an air blowing device positioned above the glass film after the cutting step, and a support roller positioned below the air blowing device and supporting the lower surface of the glass film after the cutting step. wherein the supporting roller is a free roller, the second tension adjusting device has a conveying roller contacting the glass film after the cutting step to have a wrap angle, the conveying roller is a drive roller driven to rotate, The third tension adjusting device may include a pair of rollers for sandwiching the glass film after the cutting step.

According to this configuration, the glass film after the cutting step is performed by the first tension adjusting process (first tension adjusting device), the second tension adjusting process (second tension adjusting device), and the third tension adjusting process (third tension adjusting device). By adjusting the tension, it is possible to prevent excessive tension from acting on the glass film, and to prevent the occurrence of vibration of the glass film in the cutting step.

According to the present invention, cutting defects of the glass film can be prevented by adjusting the tension applied to the glass film.

1 is a side view showing an apparatus for manufacturing a glass roll according to a first embodiment.
Fig. 2 is a plan view of a first tension adjusting device and a second cutting part;
FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2;
4 is a flow chart showing a method for manufacturing a glass roll.
5 is a flow chart showing a tension adjustment process.
Fig. 6 is a side view showing a glass roll manufacturing apparatus according to a second embodiment.
7 is a plan view of the first tension adjusting device and the second cutting portion.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated, referring drawings. 1 to 5 show a first embodiment of a method for manufacturing a glass roll according to the present invention.

1 shows the manufacturing apparatus of the glass roll used for this method. The manufacturing apparatus 1 includes a molding unit 2 for forming a strip-shaped base glass film G, and a direction conversion unit 3 for converting the traveling direction of the base glass film G from the longitudinal downward direction to the transverse direction; , the 1st conveyance part 4 which conveys the base material glass film G in the transverse direction after direction change, and the 1st which cuts both ends of the base material glass film G in the width direction, and forms the 1st glass film G1 The cutting part 5 and the 1st winding apparatus 6 which winds up the 1st glass film G1 in roll shape and obtains the 1st glass roll GRL1 are provided.

Moreover, the manufacturing apparatus 1 conveys the unwinding apparatus 7 which sends out the 1st glass film G1 from the 1st glass roll GRL1, and the 1st glass film G1 supplied from the unwinding apparatus 7 The 2nd conveyance part 8 which does, the 2nd cutting part 9 which cuts a part of the 1st glass film G1, and forms the 2nd glass film G2, and the 2nd glass film G2 in roll shape. It winds up and is further equipped with the 2nd winding device 10 which obtains 2nd glass roll GRL2.

The forming part 2 includes a substantially wedge-shaped molded body 11 viewed from a cross section in which an overflow groove 11a is formed at the upper end, and a molten glass disposed directly below the molded body 11 and formed by the molded body 11 ( It has an edge roller 12 that sandwiches the GM) from both sides of the front and back, and an annealer 13 disposed directly under the edge roller 12.

The molding unit 2 causes the molten glass (GM) overflowing from the overflow groove 11a of the molding body 11 to flow down along both sides of the molding body 11, and joins them at the lower ends to form a film. The edge roller 12 regulates shrinkage of the molten glass GM in the width direction to adjust the dimensions of the base material glass film G in the width direction. The annealer 13 is for annealing the base material glass film G. The annealer 13 has annealer rollers 14 disposed at multiple stages in the vertical direction.

Below the annealer 13, the support roller 15 which clamps base material glass film G from both sides of front and back is arrange|positioned. Between the support roller 15 and the edge roller 12, or between the support roller 15 and the annealer roller 14 at one location, in order to promote thinning of the base glass film G, a base glass film ( G) is tensioned.

The direction conversion unit 3 is formed at a position below the support roller 15 . A plurality of guide rollers 16 for guiding the base material glass film G are arranged in a curved shape in the direction conversion unit 3 . These guide rollers 16 guide the base material glass film G conveyed in the vertical direction in the transverse direction.

The 1st conveyance part 4 is arrange|positioned in front (downstream side) of the direction change part 3. The 1st conveyance part 4 conveys base material glass film G which passed through the direction conversion part 3 downstream along the horizontal conveyance direction X1.

In addition, the 1st conveyance part 4 can take arbitrary structures, for example, it is possible to configure with one or several belt conveyors. In this case, the 1st conveyance part 4 is provided with the conveyance belt 17, and can convey base material glass film G by driving this conveyance belt 17. The 1st conveyance part 4 is not limited to this structure, It is also possible to use various conveyance apparatuses, such as a roller conveyor.

The first cutting portion 5 is disposed above the first conveying portion 4 . In this embodiment, the 1st cutting part 5 is comprised so that base material glass film G may be cut by laser cutting. Specifically, the first cutting portion 5 includes a pair of laser irradiation devices (hereinafter, referred to as “first laser irradiation devices”) 18 and 1 disposed on the downstream side of the first laser irradiation device 18. It has a pair of cooling devices (hereinafter referred to as "first cooling devices") 19 .

The first cut portion 5 irradiates and heats a laser beam L from each first laser irradiation device 18 to a predetermined portion of the base material glass film G to be conveyed, and then heats it, and then the refrigerant ( R) is released to cool the heating site.

The 1st winding device 6 is provided downstream of the 1st conveyance part 4 and the 1st cutting part 5. The 1st winding device 6 rotates the winding core 20 and forms 1st glass roll GRL1 by winding up the 1st glass film G1 in roll shape. This 1st glass roll GRL1 is conveyed to the position of the unwinding apparatus 7.

The unwinding apparatus 7 functions as a supply part which supplies the 1st glass film G1 to the 2nd conveyance part 8 and the 2nd cutting part 9. The unwinding apparatus 7 attaches the 1st glass roll GRL1 conveyed from the 1st winding apparatus 6, sends out the 1st glass film G1 from this 1st glass roll GRL1, and becomes the 2nd conveyance part (8) is supplied.

The 2nd conveyance part 8 conveys the 1st glass film G1 and the 2nd glass film G2 by the roll-to-roll system. After the 2nd conveyance part 8 conveys the 1st glass film G1 sent out from the 1st glass roll GRL1 in the unwinding apparatus 7 toward upper direction Z1, along the lateral conveyance direction X2 send back The 2nd conveyance part 8 conveys the 2nd glass film G2 formed by the 2nd cutting part 9 along the transverse conveyance direction X2, and then downwards Z2 toward the 2nd winding device 10. send back

As specifically shown in FIG. 1, the 2nd conveyance part 8 is conveyance roller 21a, 21b arrange|positioned in each place of the conveyance route in order to convey the 1st glass film G1 and the 2nd glass film G2. ), the upstream conveyor 22a located upstream of the second cutting portion 9, the downstream conveyor 22b located downstream of the second cutting portion 9, and the second cutting portion 9 The separation device 23 that separates the non-product portion Gs formed by cutting the first glass film G1 from the second glass film G2 and the tension applied to the second glass film G2 are adjusted. It includes tension adjusting devices 24 to 26 that do.

The upstream conveyor 22a is configured as a belt conveyor, but is not limited to this configuration. In this embodiment, the upstream conveyor 22a is provided with a plurality of belts (hereinafter referred to as “first belts”) 27 . The 1st belt 27 supports the 1st glass film G1 so that it may become a horizontal attitude while contacting the lower surface of the 1st glass film G1. The first belt 27 is configured to convey the first glass film G1 toward the second cutting portion 9 on the downstream side.

Each of the first belts 27 is constituted by, for example, an endless belt-shaped belt. As shown in Fig. 2, among the plurality of first belts 27, those located at the center portion in the width direction are constituted by suction belts. This first belt (suction belt) 27 has a plurality of suction holes 27a penetrating in the thickness direction. The suction hole 27a is connected to an unillustrated suction device. With this configuration, the upstream conveyor 22a functions as a suction conveying device that adsorbs the first glass film G1 and conveys it to the second cutting section 9 .

The downstream conveyor 22b is composed of a suction belt conveyor or other suction conveying device. The downstream conveyor 22b is provided with a plurality of belts (hereinafter referred to as "second belts") 28. The 2nd belt 28 supports the 2nd glass film G2 so that it may become a horizontal attitude while contacting the lower surface of the 2nd glass film G2. The 2nd belt 28 is comprised so that the 2nd glass film G2 may be conveyed to the separation device 23 on the downstream side.

Each second belt 28 is constituted by, for example, an endless belt-shaped belt. The 2nd belt 28 is comprised by the suction belt which adsorbs the 2nd glass film G2, for example. As shown in Fig. 2, the second belt 28 has a plurality of suction holes 28a penetrating in the thickness direction. The suction hole 28a is connected to an unillustrated suction device.

As shown in FIGS. 2 and 3 , the separating device 23 is disposed on the downstream side of the downstream conveyor 22b. The separation device 23 includes a first support roller 23a and a second support roller 23b supporting the second glass film G2, and a third support roller 23c supporting the non-product portion Gs, , the first air blowing device 29a blowing air A toward the second glass film G2, and the second air blowing device 29b blowing air B toward the second glass film G2. ) is provided.

The first support roller 23a includes two support rollers. Each 1st support roller 23a supports each edge part Ga, Gb in the width direction Y of the 2nd glass film G2 from the lower surface side of the 2nd glass film G2. The second support roller 23b is disposed between the two first support rollers 23a. The outer diameter of the second support roller 23b is larger than the outer diameter of the first support roller 23a. The 1st support roller 23a and the 2nd support roller 23b are comprised by the free roller, for example, and rotate by friction with the 2nd glass film G2.

The 3rd support roller 23c conveys the non-product part Gs produced by cutting off the edge part Ga, Gb in the width direction Y of the 1st glass film G1 downstream. The outer diameter of the third support roller 23c is approximately the same size as the outer diameter of the first support roller 23a and smaller than the outer diameter of the second support roller 23b. Since the 2nd support roller 23b lifts the 2nd glass film G2 by this structure, the 2nd glass film G2 (end part Ga, Gb) supported by the 1st support roller 23a and , a gap is generated between the non-product parts Gs supported by the third support roller 23c. Therefore, it becomes easier to avoid contact of the 2nd glass film G2 (end part Ga, Gb) and the non-product part Gs.

The 1st air blowing device 29a and the 2nd air blowing device 29b are arrange|positioned above the 2nd glass film G2. The 1st air blowing device 29a blows air A toward the center part in the width direction Y of the 2nd glass film G2. The 2nd air blowing device 29b blows air B to the edge part Ga, Gb of the 2nd glass film G2. Since the air B needs to be pressed so as to bend the ends Ga and Gb downward, the injection pressure is relatively large, and the air A is simply used to prevent the second glass film G2 from being lifted. Therefore, the injection pressure is relatively small. In FIG. 2, the portion indicated by reference numeral AP so as to overlap with the second support roller 23b (portion with cross hatching) is applied to the second glass film G2 by each air blowing device 29a, 29b. It shows the area where air (A, B) is blown.

As shown in FIGS. 1 and 2 , the second cutting portion 9 is disposed in a region between the upstream conveyor 22a and the downstream conveyor 22b in the second transport section 8 . The second cutting portion 9 is configured to cut the ends Ga and Gb of the first glass film G1 in the width direction by laser cutting. The second cutting portion 9 is formed by a pair of laser irradiation devices (hereinafter, referred to as "second laser irradiation devices") 30 and a pair of cooling devices disposed on the downstream side of each second laser irradiation device 30. It has a device (hereinafter referred to as a "second cooling device") 31.

As shown in FIG. 1, the surface plate 32 which contacts the lower surface of the 1st glass film G1 is arrange|positioned at the position below the 2nd laser irradiation apparatus 30 and the 2nd cooling apparatus 31. As shown in FIG. 2, since the form which cuts the 1st glass film G1 at two places of the width direction is employ|adopted, the surface plate 32 consists of a pair of 2nd laser irradiation device 30 and a 2nd cooling device. It is arranged in two places corresponding to (31).

Although not shown, the surface plate 32 is installed and fixed to the floor surface, and is always in a stationary state. The platen 32 is provided with a plurality of suction ports 33 for adsorbing the first glass film G1. The suction port 33 is connected to an unillustrated suction device.

As shown in FIG. 1 , the tension adjusting devices 24 to 26 are disposed between the upstream conveyor 22a and the second winding device 10 . The tension adjusting devices 24 to 26 include a first tension adjusting device 24 positioned downstream of the second cut portion 9 and a second tension adjusting device positioned downstream of the first tension adjusting device 24. (25) and a third tension adjusting device (26) located downstream of the second tension adjusting device (25).

The first tension adjusting device 24 includes an air blowing device 34 positioned above the second glass film G2 and a bottom surface of the air blowing device 34 positioned below the second glass film G2. A support roller 35 for supporting is provided.

The air blowing device 34 is configured to blow air A downward. In FIG. 2 , the portion indicated by reference numeral AP overlaps with the support roller 35 (portion with cross-hatching) by which air A is blown against the second glass film G2 by the air blowing device 34. Indicates the blowing area.

The air blowing device 34 blows air A over the entire width of the second glass film G2 in the width direction Y, but the manner of blowing the air A is not limited to this embodiment. . The air blowing device 34 blows air A into the central portion of the second glass film G2 in the width direction Y so that the air A does not touch the ends Ga and Gb of the second glass film G2. You can spray it so that it touches.

The support roller 35 is constituted by, for example, a free roller. The outer diameter of the support roller 35 is 100 to 200 mm, but is not limited to this range. The outer peripheral surface of the support roller 35 is made of resin, but is not limited to this material. Support roller 35 is supported from below over the entire width of the width direction Y of the 2nd glass film G2.

The second tension adjusting device 25 includes a conveying roller 36 that contacts the second glass film G2 so as to have a wrap angle. In this embodiment, the conveyance roller 36 is a drive roller driven to rotate by a drive motor (not shown). It is preferable that the wrap angle (central angle) of the 2nd glass film G2 in the conveyance roller 36 is 40 degrees - 50 degrees, but it is not limited to this range. The outer circumferential surface of the conveying roller 36 is made of resin, but is not limited to this material.

The 2nd tension adjusting device 25 (conveyance roller 36) functions also as a direction conversion part which changes the conveyance direction of the 2nd glass film G2 from the horizontal conveyance direction X2 to the downward direction Z2.

The third tension adjusting device 26 is on the downstream side of the second tension adjusting device 25 and is located below the second tension adjusting device 25 . The third tension adjusting device 26 includes a pair of rollers 37 and 38 sandwiching the second glass film G2. The pair of rollers 37 and 38 include a first roller 37 contacting one surface of the second glass film G2 and a second roller contacting the other surface of the second glass film G2 ( 38).

At least one of the first roller 37 and the second roller 38 is a drive roller driven to rotate by a motor (not shown). The outer diameter of the first roller 37 may be the same as or different from the outer diameter of the second roller 38 . The outer peripheral surface of each roller 37, 38 is made of resin, but is not limited to this material.

The 2nd winding device 10 is downstream of the 3rd tension adjusting device 26, and is located below this 3rd tension adjusting device 26. The 2nd winding device 10 forms the 2nd glass roll GRL2 by winding up the 2nd glass film G2 which passed the 3rd tension adjusting device 26 by the winding core 39.

As the material of the second glass film G2 (first glass film G1) manufactured by the manufacturing apparatus 1 having the above structure, silicate glass and silica glass are used, and borosilicate glass, soda lime glass and aluminum are preferred. Nosilicate glass and chemically strengthened glass are used, and most preferably, alkali-free glass is used. Here, the alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide), and specifically, a glass having an alkali component weight ratio of 3000 ppm or less. The weight ratio of the alkali component in the present invention is preferably 1000 ppm or less, more preferably 500 ppm or less, and most preferably 300 ppm or less.

In addition, the thickness of the second glass film G2 (first glass film G1) is 10 μm or more and 300 μm or less, preferably 30 μm or more and 200 μm or less, and most preferably 30 μm or more 100 μm. less than μm.

Hereinafter, the method of manufacturing 2nd glass roll GRL2 using the manufacturing apparatus 1 of the said structure is demonstrated.

In this method, between the 1st conveyance process which conveys base material glass film G and the 1st glass film G1, and the unwinding apparatus 7 to the 2nd winding apparatus 10, the 1st glass film G1 and The 2nd conveyance process which conveys the 2nd glass film G2 is provided.

In the 1st conveyance step, the annealer roller 14 of the annealer 13, the support roller 15, the direction conversion part 3, and the 1st conveyance part 4 carry out base material glass film G to 1st It is conveyed to the cutting part (5). In a 1st conveyance process, the 1st glass film G1 formed by the 1st cutting part 5 is conveyed to the 1st winding device 6 by the 1st conveyance part 4.

At the 2nd conveyance process, the 1st glass film G1 is conveyed toward the 2nd cutting part 9 from the unwinding apparatus 7 with the 2nd conveyance part 8. At the 2nd conveyance process, the 2nd glass film G2 formed by the 2nd cutting part 9 is conveyed toward the unwinding apparatus 7 by the 2nd conveyance part 8.

As shown in FIG. 4, this method includes a forming step (S1), a first cutting step (S2), a first winding step (S3), a supply step (S4), an upstream conveying step (S5), A 2nd cutting process (S6), a downstream conveyance process (S7), a tension adjustment process (S8), and a 2nd coiling process (S9) are provided. Among them, the upstream conveyance step (S5), the downstream conveyance step (S7), and the tension adjustment step (S8) constitute a part of the second conveyance step.

In the molding step (S1), the molten glass GM overflowing from the overflow groove 11a of the molded object 11 in the molded part 2 flows along both sides of the molded object 11, respectively, and joins at the lower end thereof. and molded into a film.

At this time, shrinkage of the molten glass GM in the width direction is regulated by the edge roller 12 to form a base material glass film G having a predetermined width. After that, the base material glass film G is annealed by the annealer 13 (slow cooling step). The base glass film G is formed to a predetermined thickness by the tension of the support roller 15 .

1st cutting process S2 cuts both ends of this base material glass film G in the width direction, conveying continuously the base material glass film G by the 1st conveyance process. Specifically, in the first cutting step S2, while conveying the base material glass film G along the horizontal conveying direction X1 by the first conveying part 4, the first laser irradiation device in the first cutting part 5 A part of the base material glass film G is irradiated with laser light L from (18).

The base material glass film G is heated by irradiation of the laser light L as described above. Thereafter, when the heated portion of the base glass film G reaches directly below the first cooling device 19, it is cooled by receiving the refrigerant R sprayed downward from the first cooling device 19.

Thermal stress is generated in the base glass film G due to expansion due to local heating of the first laser irradiation device 18 and contraction due to cooling of the first cooling device 19 . Initial cracks are formed in advance in the base glass film G, and these cracks are propagated by thermal stress. As a result, the both ends (lug portions) of the base glass film G in the width direction are separated from the base glass film G as non-product parts Gs, and the first glass film G1 is formed.

In the 1st winding-up process S3, the 1st glass roll GRL1 is formed by winding up the 1st glass film G1 to the core 20 in the 1st winding device 6. After that, 1st glass roll GRL1 is separated from the 1st winding device 6, and is conveyed to the unwinding device 7.

In supply process S4, the 1st glass film G1 is sent out from 1st glass roll GRL1 attached to the unwinding apparatus 7. The 1st glass film G1 is conveyed upward Z1 via the conveyance roller 21a of the 2nd conveyance part 8.

After that, in the upstream conveyance step S5, the upstream conveyor 22a supplies the 1st glass film G1 to the 2nd cutting part 9 while conveying it along the horizontal conveyance direction X2 adsorb|sucking it (Adsorption Conveyance Process). Thereby, the upstream conveyor 22a can convey this 1st glass film G1 to the 2nd cutting part 9 so that position shift may not arise in the 1st glass film G1.

In 2nd cutting process S6, laser beam L is irradiated by the 2nd laser irradiation apparatus 30 to a part of 1st glass film G1 continuously supplied from the upstream conveyor 22a.

The first glass film G1 is heated by irradiation of the laser light L as described above. Thereafter, when the heated portion of the first glass film G1 reaches directly below the second cooling device 31, it is cooled by receiving the refrigerant R sprayed downward from the second cooling device 31.

Thermal stress is generated in the first glass film G1 due to expansion due to local heating of the second laser irradiation device 30 and contraction due to cooling of the second cooling device 31 . Initial cracks are formed in advance in the first glass film G1, and these cracks are propagated by thermal stress. Thereby, the both ends Ga and Gb in the width direction Y of the first glass film G1 are separated from the first glass film G1 as non-product parts Gs, and the second glass film G2 ) is formed.

In the downstream conveyor step S7, the downstream conveyor 22b conveys the second glass film G2 to the downstream side while adsorbing the second glass film G2 with a weak adsorption force by the second belt 28. Thereby, it can prevent that the 2nd glass film G2 after cutting flutters.

The separation device 23 blows air A from the first air blowing device 29a and air B from the second air blowing device 29b, and transported by the downstream conveyor 22b. The 2nd glass film G2 is supported by the 1st support roller 23a and the 2nd support roller 23b.

As shown in FIG. 3, the separation device 23 lifts the 2nd glass film G2 with the 2nd support roller 23b, and to the air B injected from the 2nd air blowing device 29b, Thus, the ends Ga and Gb of the second glass film G2 are pressed from above.

Thereby, the 2nd glass film G2 can be forcibly curved and deformed along the width direction Y. In this case, the second support roller 23b supports the lower surface of the curved second glass film G2.

Due to this curvature, the separation device 23 separates the second glass film G2 and the non-product portion Gs in the width direction. The 3rd support roller 23c conveys the non-product part Gs separated from the 2nd glass film G2 to the collection|recovery part of the downstream side.

In tension adjustment process (S8), the 2nd glass film G2 is passed between the downstream conveyor 22b and the 2nd winding device 10, the conveyance roller 21b of the 2nd conveyance part 8, and the tension adjustment device 24 ~ 26) while conveying, the tension of this second glass film G2 is adjusted. As shown in Fig. 5, the tension adjustment step S8 includes a first tension adjustment step S81, a second tension adjustment step S82, and a third tension adjustment step S83.

In the first tension adjusting step S81, the air blowing device 34 of the first tension adjusting device 24 blows onto the upper surface of the second glass film G2 sent downstream by the downstream conveyor 22b. Air (A) is contacted. The 2nd glass film G2 is pressed against the support roller 35 by this air A. Thereby, it is prevented that excessive tension|tensile_strength acts on the part of the 2nd glass film G2 located upstream rather than the support roller 35.

In the second tension adjustment step S82, the second glass film G2 is conveyed by driving the conveyance roller 36 with a motor. In this case, it is preferable to make the conveyance speed of the 2nd glass film G2 by the conveyance roller 36 smaller than the conveyance speed of the 2nd glass film G2 by the downstream conveyor 22b. Thereby, in the range from the downstream conveyor 22b to the 2nd tension adjusting device 25, it adjusts so that the tension of the 2nd glass film G2 may not become excessive. Moreover, in the 2nd tension adjustment process S82, the conveyance roller 36 changes the conveyance direction of the 2nd glass film G2 from the horizontal conveyance direction X2 to the downward direction Z2.

In the 3rd tension adjusting process (S83), the 2nd glass film G2 which passes through the 2nd tension adjusting device 25 and moves downward (Z2) is moved by the 1st roller 37 of the 3rd tension adjusting device 26 and conveyed further downward in a state sandwiched by the second roller 38. In this way, the 2nd glass film G2 in the upstream side rather than the 3rd tension adjusting device 26 is conveyed by sandwiching the 2nd glass film G2 by the 1st roller 37 and the 2nd roller 38. tension is adjusted.

In the 2nd winding-up process S9, the 2nd glass film G2 is wound up by the winding-up core 39 in the 2nd winding device 10. The 2nd winding device 10 provides tension|tensile_strength to the 2nd glass film G2 by rotating the winding core 39. The 2nd glass roll GRL2 is formed in the 2nd winding apparatus 10 by winding up the 2nd glass film G2 of predetermined length.

According to the manufacturing method of the 2nd glass roll GRL2 by this embodiment demonstrated above, the tension|tensile_strength given to the 2nd glass film G2 is adjusted by tension adjusting process S8 (tension adjusting devices 24-26) By doing so, it is possible to prevent excessive tension from acting on the second glass film G2. This makes it possible to prevent the occurrence of vibration of the second glass film G2 in the second cutting step S6 and to prevent the occurrence of defective cutting by the second glass film G2.

6 and 7 show a second embodiment of the present invention. Manufacturing apparatus 1 according to this embodiment forms two second glass films G2A and G2B from one sheet of first glass film G1 and winds them up to form two second glass rolls GRL2A and GRL2B. can be manufactured.

The second cutting portion 9 of the manufacturing apparatus 1 includes three second laser irradiation devices 30 and 3 to form two second glass films G2A and G2B from one first glass film G1. A second cooling device 31 of the table is provided. Three base plates 32 supporting the lower surface of the first glass film G1 are disposed at positions below each second laser irradiation device 30 so as to correspond to each second laser irradiation device 30 .

The manufacturing apparatus 1 includes two first tension adjusting devices 24A and 24B, second tension adjusting devices 25A and 25B, respectively, in order to adjust the tension applied to the two second glass films G2A and G2B, and third tension adjusting devices 26A, 26B. The structure of each tension adjusting device 24A, 24B, 25A, 25B, 26A, 26B is the same as that of the tension adjusting devices 24 to 26 in the first embodiment. Moreover, the manufacturing apparatus 1 is equipped with two separation apparatus 23A, 23B so that it may correspond to 2nd glass film G2A, G2B of 2 sheets.

The manufacturing apparatus 1 is equipped with two 2nd winding apparatus 10A, 10B in order to individually wind up the 2nd glass film G2A, G2B of 2 sheets formed in the 2nd cutting part 9.

Hereinafter, a different point from 1st Embodiment is demonstrated in the method of manufacturing 2nd glass roll GRL2A, GRL2B using the manufacturing apparatus 1 by this embodiment.

In the second cutting step S6, the laser beam L is irradiated from each second laser irradiation device 30 to the second glass film G2, and from each second cooling device 31, the second glass film Refrigerant (R) is injected toward (G2). The non-product part Gs is separated from the 1st glass film G1 by this, and the 2nd glass film G2A of 2 sheets G2B as a product part is formed.

In the first tension adjusting step S81 of the tension adjusting step S8, the tension applied to the two second glass films G2A and G2B is individually adjusted by the two first tension adjusting devices 24A and 24B. . After that, in the second tension adjusting step S82, the tensions of the second glass films G2A and G2B are individually adjusted by the two second tension adjusting devices 25A and 25B. Similarly, in the subsequent 3rd tension adjustment process (S83), the tension|tensile_tension of 2nd glass film G2A, G2B is individually adjusted by two sets of 3rd tension adjusting devices 26A, 26B.

In the 2nd winding-up process S9, the 2nd glass film G2A of 2 sheets, G2B of 2 sheets is individually wound up by 2 sets of 2nd coiling apparatus 10A, 10B. Thereby, 2nd glass roll GRL2A, GRL2B is formed in each 2nd winding apparatus 10A, 10B.

Other configurations in this embodiment are the same as those in the first embodiment. In this embodiment, common reference numerals are assigned to components common to those in the first embodiment.

In addition, this invention is not limited to the structure of the said embodiment, nor is it limited to the above-mentioned effect. Various changes are possible for this invention within the range which does not deviate from the summary of this invention.

In the above-mentioned embodiment, the manufacturing method of the 2nd glass roll GRL2 which performs all the 1st tension adjustment process (S81), the 2nd tension adjustment process (S82), and the 3rd tension adjustment process (S83) was illustrated, but this invention is not limited to this configuration.

In the present invention, it is possible to adjust the tension of the second glass film G2 by performing only the first tension adjusting step S81, that is, by operating only the first tension adjusting device 24. In addition, in the present invention, only the second tension adjusting step (S82) is executed (only the second tension adjusting device 25 is operated), or only the third tension adjusting step (S83) is executed (the third tension adjusting device is operated). (26) alone), it is possible to adjust the tension of the second glass film G2. Further, the tension adjusting step (S8) may be performed by operating two tension adjusting devices among the tension adjusting devices 24 to 26 .

In the above embodiment, the manufacturing apparatus 1 includes the first tension adjusting device 24, the second tension adjusting device 25, and the third tension adjusting device 26, but the present invention is not limited to this configuration. don't The method includes a manufacturing apparatus 1 including only the first tension adjusting device 24, a manufacturing apparatus 1 including only the second tension adjusting device 25, and a manufacturing device including only the third tension adjusting device 26. It is possible to implement also by the manufacturing apparatus 1 provided with (1) or two of these.

In the above embodiment, the manufacturing apparatus 1 was provided with the separation device 23, but the present invention is not limited to this configuration, and the separation device 23 may not be provided.

In the above embodiment, the downstream conveyor 22b was provided with a suction belt conveyor, but the present invention is not limited to this configuration. The downstream conveyor 22b may be a normal belt conveyor not equipped with an adsorption mechanism.

In the said embodiment, although the example which supplied the 1st glass film G1 by the unwinding apparatus 7 was shown in supply process S4, this invention is not limited to this structure. This invention is applicable also to the method of manufacturing 1st glass roll GRL1.

That is, the 1st cutting part 5 of the manufacturing apparatus 1 may be provided with the same structure as the 2nd cutting part 9. The 1st conveyance part 4 has the same structure as the 2nd conveyance part 8 (upstream conveyor 22a, downstream conveyor 22b, separation device 23, and tension adjusting devices 24-26). You can do it.

In this case, in the supply step, the base material glass film G is supplied to the first cutting section 5 from the molding section 2 and the direction conversion section 3 . That is, the molding part 2 and the direction conversion part 3 function as a supply part which supplies the glass film (base material glass film G) to the 1st cut part 5 similarly to the unwinding apparatus 7. The tension of the first glass film G1 formed by cutting both ends of the base material glass film G in the width direction by the first cut portion 5 is adjusted by the tension adjusting step.

6: first winding device 10: second winding device
18: first laser irradiation device
22a: upstream conveyor (adsorption conveying device) 24: first tension adjusting device
25: second tension adjusting device 26: third tension adjusting device
30: second laser irradiation device 34: air injection device
35: support roller 36: conveying roller
37: first roller 38: second roller
G: Base glass film G1: First glass film
G2: Second glass film GRL1: First glass roll
GRL2: 2nd glass roll L: laser light
S2: 1st cutting process S3: 1st winding process
S5: Upstream Conveyance Process (Adsorption Conveyance Process) S6: 2nd Cutting Process
S8: Tension Adjustment Process S81: First Tension Adjustment Process
S82: Second Tension Adjustment Process S83: Third Tension Adjustment Process
S9: Second winding process

Claims (5)

A conveyance step of transporting the glass film, a cutting step of cutting a part of the glass film by irradiating the glass film with laser light from a laser irradiation device, and winding the glass film after the cutting step into a roll shape by a winding device. In the manufacturing method of the glass roll provided with a winding process,
The conveying step includes a suction conveying step of adsorbing and conveying the glass film before the cutting step by an adsorption conveying device located upstream of the laser irradiation device in the conveying direction;
and a tension adjusting step of adjusting tension applied to the glass film after the cutting step by means of a tension adjusting device provided between the laser irradiation device and the winding device. According to claim 1,
the tension adjusting device includes an air blowing device positioned above the glass film after the cutting step, and a support roller positioned below the air blowing device to support a lower surface of the glass film after the cutting step;
The method of manufacturing a glass roll wherein the support roller is a free roller. According to claim 1 or 2,
The tension adjusting device includes a conveying roller that contacts the glass film after the cutting step to have a wrap angle;
The method of manufacturing a glass roll wherein the conveying roller is a drive roller driven to rotate. According to any one of claims 1 to 3,
The method of manufacturing a glass roll according to claim 1 , wherein the tension adjusting device includes a pair of rollers for sandwiching the glass film after the cutting step. According to claim 1,
The tension adjusting step includes a first tension adjusting step, a second tension adjusting step performed after the first tension adjusting step, and a third tension adjusting step performed after the second tension adjusting step,
The tension adjusting device includes a first tension adjusting device that performs the first tension adjusting process, a second tension adjusting device that performs the second tension adjusting process, and a third tension adjusting device that performs the third tension adjusting process. do,
the first tension adjusting device includes an air blowing device positioned above the glass film after the cutting step, and a support roller positioned below the air blowing device to support a lower surface of the glass film after the cutting step; , the support roller is a free roller,
the second tension adjusting device includes a conveying roller that contacts the glass film after the cutting step to have a wrap angle, the conveying roller being a drive roller driven to rotate;
The method for manufacturing a glass roll according to claim 1 , wherein the third tension adjusting device includes a pair of rollers for sandwiching the glass film after the cutting step.

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