JP2012136413A - Method for producing glass roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a glass roll, which is hardly influenced by a glass cullet generated by the cutting of the edge part of a glass film, and in which subsidiary fracture is hardly generated upon use.SOLUTION: In the method for producing a glass roll, a glass film is wound so as to be a roll shape. The method includes: a molding step (step S1) of molding a glass film with a prescribed thickness having flexibility; a cutting step (step S2) of cutting a part of the glass film molded by the molding step by laser splitting; a removing step (step S3) of removing a glass cullet stuck to the cut edge part of the glass film cut by the cutting step; and a winding step (step S4) of winding the glass film from which the glass cullet has been removed by the removing step, into a roll shape.

Description

  The present invention relates to a method for producing a glass roll obtained by winding a glass film into a roll.

In recent years, a flexible glass substrate that can be used not only for flat surfaces but also for curved surfaces has been developed for use in flat panel displays and solar cells.
This glass substrate is a thin plate glass having a thickness of approximately 200 μm or less and is called a glass film.
Since such a glass film is thinned to a film shape, it is easily damaged. Therefore, paying attention to the flexibility of the glass film, in the case of transportation or the like, a packaging form is used in which a glass roll is formed by covering one surface of the glass film with a polymer layer and winding it into a roll.

However, if the glass film is rolled up, stress concentration may occur on both end faces in the width direction of the glass film, so if there are minute scratches on both end faces in the width direction of the glass film, damage will occur from that point. Is likely to occur.
Thus, for example, Patent Document 1 proposes a glass roll in which both ends in the width direction of a glass film are cut by laser cutting and wound up.
According to such a glass roll, both end surfaces in the width direction of the glass film are cut by laser cleaving, which causes damage such as minute scratches (for example, microcracks) on the both end surfaces in the width direction of the glass film. Defects are less likely to occur.
In other words, both end faces in the width direction of the glass film have smooth high-strength cross-sections, and when the glass film is in a state of damage, damage to the glass film from the both end faces in the width direction due to impact impact or stress concentration from the outside. Can be reduced as much as possible.
In general, it is said that glass powder (glass cullet) does not come out from the cut surface by laser cleaving, and glass generated by glass cullet during cutting, winding after cutting, and subsequent processing. It can also be expected to prevent the occurrence of defects such as film scratches and breakage due to stress concentration.

JP2010-132531

However, even if it is a glass roll of a glass film that has been cut at both ends in the width direction by laser cleaving in Patent Document 1, when the glass roll is incorporated into a roll-to-roll apparatus and used, the glass film frequently breaks. It is.
According to the study by the present inventors, it is difficult to completely prevent the occurrence of glass cullet even in laser cleaving, and the glass film with the glass cullet attached is conveyed in a roll-to-roll apparatus. In particular, it has been found that deterioration (microcrack growth) due to stress concentration at the glass cullet adhesion portion occurs at the cut end of the glass film.
In other words, in a thin glass film, glass cullet adheres to the cut end where micro cracks are likely to occur. There is a problem of not breaking.

  This invention is providing the manufacturing method of the glass roll which is hard to receive the influence of the glass cullet generated by the cutting | disconnection of the edge part of a glass film, and is hard to generate | occur | produce a fracture | rupture in use.

In order to solve the above problems, according to the present invention,
A method for producing a glass roll obtained by winding a glass film into a roll,
A molding step of molding a flexible glass film having a predetermined thickness;
A cutting step of cutting a part of the glass film formed in the forming step by laser cutting;
A removal step of removing the glass cullet attached to the cut end of the glass film cut by the cutting step,
A winding step of winding the glass film from which the glass cullet has been removed by the removing step into a roll;
It is characterized by having.

Moreover, according to the present invention,
A method for producing a glass roll obtained by winding a glass film into a roll,
A supplying step of supplying a flexible glass film having a predetermined thickness from a glass roll wound into a roll;
A cutting step of cutting a part of the glass film supplied from the supplying step by laser cutting;
A removal step of removing the glass cullet attached to the cut end of the glass film cut by the cutting step,
A winding step of winding the glass film from which the glass cullet has been removed by the removing step into a roll;
It is characterized by having.

According to the present invention, after cutting a part of the glass film, for example, the ear part by laser cutting, the glass cullet attached to the cut end of the cut glass film is removed, and then the glass cullet is removed. The film is wound into a roll.
For this reason, it is difficult to be affected by the glass cullet generated by cutting the end of the glass film, and it is possible to produce a glass roll that is difficult to break during use.
The term “ear part” as used herein refers to the thick part at both ends of the glass film that is formed when the glass film is formed. The ears of the glass film are removed in order to reduce the thickness variation of the glass film and stabilize the processing such as conveyance.

It is a perspective view which shows the glass roll which concerns on this invention. It is a schematic diagram which shows the manufacturing apparatus of the glass roll which concerns on this invention. It is a block diagram which shows the control structure of the manufacturing apparatus of the glass roll of FIG. It is explanatory drawing which shows the method of cleaving a glass film. It is a schematic diagram which shows the structure of a cullet removal part. It is a flowchart which shows the manufacturing method of the glass roll which concerns on this invention. It is a schematic diagram which shows the manufacturing apparatus of the glass roll of the modification of this invention. It is a flowchart which shows the manufacturing method of the glass roll of the modification of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

  As shown in FIG. 1, a glass roll 1 according to the present invention is obtained by stacking a glass film 2 on a protective sheet 3 and winding it around a winding core 4 in a roll shape.

(Glass film)
The glass film 2 is, for example, a flexible sheet material that can be wound in a roll shape, and is formed into a thin and long shape.
Since the glass film 2 has usages from a small display for a mobile phone to a large screen display, the width (short side) is appropriately selected depending on the size of the substrate of the device to be used. Moreover, the length (long side) of the glass film 2 is designed so that it may become 10 times or more with respect to a width | variety, for example. Moreover, in order to handle as a glass roll, it is desirable for the length of the glass film 2 to be 10 m or more.
The thickness of the glass film 2 is preferably 30 μm to 200 μm, for example. With such a thickness of the glass film 2, appropriate flexibility can be imparted to the glass film 2, and unreasonable stress applied to the glass film 2 when the glass film 2 is wound can be reduced. This is because the glass film 2 can be prevented from being damaged.
In addition, when the thickness is less than 30 μm, the strength of the glass film 2 is insufficient, and when it exceeds 200 μm, the possibility of breakage due to tensile stress increases when the glass film 2 is wound to a small diameter.

Silicate glass is used for the glass film 2, preferably silica glass or borosilicate glass, and most preferably non-alkali glass.
When the glass film 2 contains an alkali component, cation substitution occurs on the surface, so-called soda blowing phenomenon occurs, and the structure becomes rough. In this case, when the glass film 2 is curved and used, there is a possibility that the glass film 2 is likely to be broken from a portion that has become rough due to deterioration over time. Here, the alkali-free glass is a glass that does not substantially contain an alkali metal oxide, and specifically, a glass having an alkali metal oxide of 1000 ppm or less.

Both end surfaces in the width direction of the glass film 2 are smooth cut surfaces formed by laser cleaving. For this reason, there are almost no defects such as minute cracks on both end faces in the width direction of the glass film 2, and when the glass film 2 is used as the glass roll 1, the impact of the impact or stress concentration from the outside causes the glass film 2. The rate of occurrence of breakage based on both end faces in the width direction is low.
Further, when the glass roll 1 is formed by overlapping the glass film 2 and the protective sheet 3 to form the glass roll 1, even if the end surface of the glass film 2 contacts the protective sheet 3, the end surface of the glass film 2 is attached to the protective sheet 3. It won't get caught by biting. Therefore, since the glass film 2 and the protective sheet 3 can be easily separated when the glass roll 1 is unpacked and the glass film 2 is taken out, it is possible to prevent the glass film 2 from being damaged during the separation.
In addition, in order to aim at the further strength improvement of the both end surfaces of the glass film 2, you may protect the said both end surfaces with resin films.
Moreover, in order to protect the start end part of the glass film 2, it is good also as attaching a resin-made film etc. to the start end part and termination | terminus part of the glass film 2 at the time of winding start of the glass film 2, and completion | finish of winding.

(Protective sheet)
The protective sheet 3 is used to prevent the occurrence of scratches due to the glass films 2 coming into contact with each other when the glass film 2 is wound, and to absorb the external pressure applied to the glass roll 1. Is.
For this reason, it is preferable that the thickness of the protection sheet 3 is 10 micrometers-2000 micrometers. If it is less than 10 μm, the buffering performance of the protective sheet 3 is not sufficient, and if it exceeds 2000 μm, the roll outer diameter of the glass roll 1 formed after winding the glass film 2 is unreasonably large. Is also not preferred.
The protective sheet 3 is preferably slightly larger than the glass film 2 in the width direction. That is, it is preferable that the protective sheet 3 protrudes from both sides in the width direction of the glass film 2 in the state of the glass roll 1. If it does in this way, since the width direction both end surfaces of the glass film 2 are protected by the protective sheet 3, it can prevent that the fine damage | wound and chip | tip by a bump etc. arise on the width direction both end surfaces of the glass film 2. Because it can.

  Moreover, it is preferable that the protective sheet 3 does not change in quality, such as softening, around 100 ° C. This is because the glass film 2 may exceed 50 ° C. when the glass roll 1 according to the present invention is produced.

  As protective sheet 3, ionomer film, polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polypropylene film, polyester film, polycarbonate film, polystyrene film, polyacrylonitrile film, ethylene vinyl acetate copolymer Use synthetic film, ethylene-vinyl alcohol copolymer film, ethylene-methacrylic acid copolymer film, polyamide resin film (nylon film), polyimide resin film, resin cushioning material such as cellophane, synthetic paper, non-woven fabric, etc. Can do. It is preferable to use a polyethylene foam resin sheet as the protective sheet 3 because it can absorb impact and has high strength against tensile stress. On the other hand, when silica or the like is dispersed in these resin films to improve the sliding with the glass film 2, the winding length due to a slight difference in diameter caused by overlapping the glass film 2 and the protective sheet 3 and winding them up is reduced. This is preferable because the displacement can be absorbed by the slip.

  Moreover, it is preferable that the protective sheet 3 is provided with conductivity. If it does in this way, when taking out the glass film 2 from the glass roll 1, since it becomes difficult to produce peeling electrification between the glass film 2 and the protective sheet 3, it is easy to make the glass film 2 and the protective sheet 3 peel. Because you can. Specifically, for example, when the protective sheet 3 is made of a resin, conductivity can be imparted by adding a component that imparts conductivity, such as polyethylene glycol, to the protective sheet 3. In this case, conductivity can be imparted by engraving conductive fibers. Conductivity can also be imparted by forming a conductive film such as ITO on the surface of the protective sheet 3.

(Glass roll manufacturing equipment)
Next, a manufacturing apparatus for manufacturing the glass roll 1 will be described.
As shown in FIGS. 2 and 3, the glass roll manufacturing apparatus 100 includes a molding unit 10 that molds the glass film 2, a cutting unit 20 that cuts a part of the molded glass film 2, for example, the ear part 2 a, and cutting. The cullet removing unit 30 that removes the glass cullet C generated when the ear part 2a is cut by the unit 20, the drive unit 40 that rotationally drives the core 4, a support roller 51, and conveying rollers 52, 53, 54, and 55. And a control unit 60 that performs overall control of each unit.

The shaping | molding part 10 is controlled by the control part 60, for example, shape | molds the glass film 2 by the overflow downdraw method.
The overflow down draw method is a molding method in which both surfaces of the glass film 2 do not come into contact with the molded member at the time of molding, so that the both surfaces (translucent surface) of the obtained glass film 2 are hardly scratched and polished. Even without this, high surface quality can be obtained.
Specifically, the molding unit 10 includes a molding zone 10 </ b> A having a wedge-shaped molded body 11 in cross-sectional view, and a slow cooling zone 10 </ b> B and a cooling zone 10 </ b> C having a plurality of cooling rollers 12.
The molding zone 10 </ b> A allows molten glass to flow down from the lower end 11 a of the molded body 11. Then, in the slow cooling zone 10B, the glass film 2 immediately after flowing down from the lower end portion 11a by the cooling roller 12 is gradually cooled, and is stretched downward while being restricted in contraction in the width direction to be reduced to a predetermined thickness. Next, in the cooling zone 10 </ b> C, the glass film 2 thinned to a predetermined thickness by the cooling roller 12 is further cooled to remove thermal strain, and the glass film 2 is formed.

  The glass film 2 extending downward from the cooling zone 10 </ b> C is smoothly curved while being supported by the plurality of support rollers 51 from below, and changes from a vertical posture to a horizontal posture. Thus, workability can be improved by changing the posture of the glass film 2. In addition, in order to prevent that an excessive stress acts on the curved part of the glass film 2, the bending angle is set to 90 degree | times or more.

The cutting part 20 is arranged at a position shifted laterally from a position directly below the forming part 10 in correspondence with the glass film 2 that is curved and has a lateral orientation as described above.
The cutting part 20 is controlled by the control part 60, and cuts a part of the glass film 2, for example, the ear | edge part 2a of the width direction both ends.
In addition, the ear | edge part said here points out the thick part of the glass film both ends made at the time of shaping | molding of the glass film 2. As shown in FIG. The ears of the glass film 2 are removed in order to reduce the thickness variation of the glass film 2 and stabilize the processing such as conveyance.
As this cutting part 20, what utilizes laser cutting is used, and in particular, so-called laser cleaving is used in which cleaving is performed by thermal stress generated by the irradiation heat of the laser.
When laser cutting is used, since the ear portion 2a is cut from the glass film 2 by using thermal stress generated by laser irradiation heat, it is not necessary to heat to a high temperature as in the case of melting. Accordingly, there is no problem that the cut surface of the glass film 2 is melted and thickened, or that the glass film 2 is unduly distorted by heat during cutting. Moreover, the cut surface (fracture cross section) by laser cleaving is a smooth surface almost free from defects such as minute cracks. Therefore, the glass film 2 can be wound up more easily, and breakage of the end portion can be prevented more reliably.
Laser cleaving is usually taken by applying a stress to the cleaving line after the cleaving line enters the glass surface by heating and cooling with a laser, but in the case of a thin glass film, it is cut by laser cleaving. In order to prevent the strength of the cut surface from being lowered by applying stress to the breaking line, a method of cutting by laser cutting without applying stress to the breaking line is desirable.

Specifically, the laser cleaving utilized in the present embodiment forms an initial crack W at the downstream end of the glass film 2 as shown in FIG. After scanning along the direction, the heated portion is cooled while scanning the cooling point Y by the refrigerant, and the initial crack W is developed by the thermal stress generated at that time to form the breaking line Z. Here, the breaking line Z is continuously formed from the front surface to the back surface of the glass film 2. Therefore, when the initial crack W is advanced and the breaking line Z is formed, the ear portion 2a corresponding to the portion where the breaking line Z is formed is cut. The scanning of the laser heating point X and the cooling point Y by the coolant is performed by sequentially transporting the glass film 2 downstream in the transport direction with the laser heating point X and the cooling point Y by the coolant fixed. .
In this manner, the cutting portion 20 cuts the ear portions 2a that are relatively thick at both ends in the width direction from the glass film 2 formed by the forming portion 10.

The glass film 2 from which the ears 2 a have been cut is conveyed to the cullet removing unit 30 with its lower surface supported by the conveying roller 52. Further, the ear portion 2a is conveyed to the cullet removing unit 30 in a state where the lower surface thereof is supported by the conveyance rollers 53 and 53 disposed on the left and right of the conveyance roller 52.
At this time, the length of the conveyance roller 52 is shorter than the length of the glass film 2 in the width direction (see FIG. 5), and the cut ends at both ends in the width direction of the glass film 2 are not in contact with the end of the conveyance roller 52. It is conveyed to the cullet removing unit 30 in the state. For this reason, the glass cullet C generated at the time of cutting the ear portion 2 a and attached to the cut end of the glass film 2 does not come into contact with the transport roller 52 until it is processed by the cullet removing unit 30. Therefore, it is possible to prevent the glass cullet C from coming into contact with the conveyance roller 52 during the conveyance to cause stress concentration and the generation of microcracks or the like in the glass film 2.

  The cullet removing unit 30 is disposed on the side of the cutting unit 20 at a position downstream of the glass film 2 in the conveyance direction. The cullet removing unit 30 is controlled by the control unit 60 and sucks and removes the glass cullet C attached to the cut end portion (and the ear portion 2a) of the glass film 2.

As shown in FIG. 5, the cullet removing unit 30 includes a pair of left and right removing mechanisms 30 </ b> L and 30 </ b> R installed at positions corresponding to both the left and right cut ends of the glass film 2.
Each of the removal mechanisms 30L and 30R includes three suction portions (suction means) 31, 31, and 31, a pair of blowing portions (blowing means) 32 and 32, and a pair of rectifying plates 33 and 33. .
The pair of blowing parts 32, 32 are arranged in the upper space of the cut end of the glass film 2, and the three suction parts 31, 31, 31 and the pair of rectifying plates 33, 33 are cut ends of the glass film 2. It is arrange | positioned in the lower space of the part.

The three suction parts 31, 31, 31 are arranged in the width direction of the glass film 2 below the boundary line between the glass film 2 and the ear part 2 a. Each suction part 31 has a slit suction port 31a extending parallel to the boundary, and sucks air mixed with glass cullet C.
An individual suction pipe 31b is connected to each slit suction port 31a. A vacuum suction means 35 is connected to the downstream side of the main suction pipe 34 where the three individual suction pipes 31b, 31b, 31b merge. The main suction pipe 34 is provided with a suction valve 34a constituted by an air operated valve or the like. In addition, an air filter 38 for collecting the sucked glass cullet C is provided in the downstream portion of the main suction pipe 34 (before the vacuum suction means 35).

The pair of blow-out portions 32, 32 are symmetrical with respect to the boundary line between the glass film 2 and the ear portion 2a, and are arranged obliquely inward so that the tip portions approach each other, and face the cut end portion of the glass film 2. And blow air (gas).
Each blowout portion 32 has a plurality of blowout nozzles 32a arranged in parallel with the boundary line, and each blowout nozzle 32a has a spiral concavo-convex portion (on the flow passage wall (inner peripheral surface) of the internal flow passage ( (Not shown) is formed, and a baffle member (not shown) is provided facing the front end side of the internal flow path. Thereby, the air which became the turbulent flow is blown out from the blowing nozzle 32a.
Individual air pipes 32b are connected to the respective blowing nozzles 32a. An air supply means 37 is connected to the upstream side of the main air pipe 36 where the plurality of individual air pipes 32b merge. The main air pipe 36 is provided with a supply valve 36a constituted by an air operated valve or the like. Further, an ionizer 39 for ionizing the supplied air is provided in the downstream portion of the main air pipe 36.

The compressed air supplied from the air supply means 37 is ionized and flows into each blowing nozzle 32a via the main air pipe 36 and the individual air pipe 32b, and a cut end (glass) of the glass film 2 from the tip of each blowing nozzle 32a. It is blown out in the vicinity of the boundary line between the film 2 and the ear 2a.
On the other hand, the air blown out onto the glass film 2 is mixed with the glass cullet C attached to the cut end portion or the ear portion 2a of the glass film 2, and the individual suction pipe 31b and the main suction pipe 31b from the three slit suction ports 31a, 31a, 31a. After being filtered through the suction pipe 34, it is exhausted to the vacuum suction means 35. The vacuum suction means 35 is constituted by a vacuum equipment or a vacuum pump in the factory, and the air supply means 37 is constituted by a compressed air equipment, a blower, an air cylinder or the like in the factory.

Each rectifying plate 33 is formed in an L shape in sectional view, rises from the outer position of the outermost suction portion 31, bends in the vicinity of the glass film 2, and extends in parallel with the glass film 2.
That is, the pair of rectifying plates 33 and 33 are disposed so as to surround the upper space of the three suction portions 31, 31 and 31.
Since the air is controlled by the control unit 60 so that the suction amount is larger than the blowing amount, the air is sucked into the suction portions 31 as a whole at the cut end portion of the glass film 2. If a part of the air is disturbed, there is a possibility that a glass cullet C that is not sucked into the suction part 31 is generated. Also in this case, the air in the upper space of the three suction portions 31, 31, 31 is covered with the pair of rectifying plates 33, 33 and hardly leaks to the outside, and the glass cullet C is attached to each suction portion 31. It comes to be surely inhaled. That is, by installing the pair of rectifying plates 33, 33, the air flow is guided to the three suction portions 31, 31, 31.

After the glass cullet C is removed by the cullet removing unit 30, the glass film 2 is conveyed by the conveying roller 55 to the core 4 arranged in the traveling direction of the glass film 2.
Moreover, the ear | edge part 2a is conveyed in the direction different from the glass film 2 with the conveyance roller 54, and is collect | recovered.

  The winding core 4 is rotationally driven with the driving of the driving unit 40 and winds the glass film 2 from which the glass cullet C has been removed together with the protective sheet 3 in a roll shape.

  The length of the core 4 is preferably longer than the width of the glass film 2. Thereby, since the edge part of the core 4 protrudes rather than the width direction both end surfaces of the glass roll 1, so that the fine crack and chip | tip of the width direction both end surfaces of the glass film 2 can be prevented by hitting etc. It has become.

  The material of the core 4 is thermosetting of metals such as aluminum alloy, stainless steel, manganese steel, carbon steel, phenol resin, urea resin, melamine resin, unsaturated polyester resin, epoxy resin, polyurethane, direal terephthalate resin, etc. Resin, polyethylene, polypropylene, polystyrene, AS resin, ABS resin, methacrylic resin, vinyl chloride and other thermoplastic resins, or these thermosetting resins and thermoplastic resins mixed with reinforced fibers such as glass fibers and carbon fibers Reinforced plastic, paper tube, etc. can be used. In particular, aluminum alloys and reinforced plastics are excellent in strength, and paper can be reduced in weight, so that it can be preferably used. Furthermore, in order to prevent the surface of the glass film 2 from being damaged, it is preferable to wind the protective sheet 3 of one turn or more around the core 4 in advance.

  A protective sheet roll 3R in which the protective sheet 3 is rolled up is installed above the core 4, and when the glass film 2 is wound around the core 4, the protective sheet 3 is pulled out from the protective sheet roll 3R. The protective sheet 3 is stacked on the outer peripheral side of the glass film 2, and the glass film 2 and the protective sheet 3 are wound in a roll shape so as to follow the surface of the core 4.

The glass film 2 is wound up to a predetermined roll outer diameter. When the predetermined outer diameter of the roll is reached, a scribing is performed in the width direction of the glass film 2 by a width direction cutting cutter (not shown), and the glass film 2 is cut only. And after winding up the cut | disconnected glass film 2 to the last, the protection sheet 3 is further wound up 1 round or more, and manufacture of the glass roll 1 is completed by cut | disconnecting the protection sheet 3 as it is.
In addition, from the viewpoint of protecting the glass film 2, the protective sheet 3 may be wound around the core 4 in advance, and the innermost layer of the glass roll 1 may be configured by the protective sheet 3.

The control unit 60 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and includes a molding unit 10, a cutting unit 20, a cullet removing unit 30, a driving unit 40, and a support roller. 51 and each part of the transport rollers 52 to 55 and the like.
The ROM of the control unit 60 stores a control program and various processing programs for controlling the above-described units, and the CPU cooperates with the control program and the various processing programs in the glass roll manufacturing apparatus 100. Control the overall operation.

Specifically, the control unit 60 forms the glass film 2 having predetermined dimensions (width, length, and thickness) by the forming unit 10, and conveys the glass film 2 in the predetermined direction by the support roller 51 at a predetermined speed. Further, when the molded glass film 2 is being transported, the control unit 60 cuts the ear 2a of the glass film 2 by laser cutting with the cutting unit 20 and transports it to the cullet removing unit 30 with the transport roller 52. To do.
In addition, the control unit 60 removes the glass cullet C attached to the cut end of the glass film 2 by the cullet removing unit 30, and then conveys the glass film 2 to the core 4 by the conveyance roller 55. Moreover, the control part 60 controls the drive part 40 to rotationally drive the core 4, and winds the glass film 2 conveyed from the cullet removing part 30 side together with the protective sheet 3 in a roll shape.
As described above, in the present embodiment, the control unit 60 performs overall control of the molding unit 10, the cutting unit 20, the cullet removal unit 30, the driving unit 40, the support roller 51, and the transport rollers 52 to 55. However, it may be configured to include a control unit that controls each unit.

(Glass roll manufacturing method)
Next, the manufacturing method of the glass roll 1 using the above-mentioned glass roll manufacturing apparatus 100 is demonstrated.
As shown in FIG. 6, the manufacturing method of the glass roll 1 has four processes, a forming process (step S1), a cutting process (step S2), a removing process (step S3), and a winding process (step S4). ing.
In the forming step (step S1), the control unit 60 uses the forming unit 10 to form the flexible glass film 2 having a predetermined thickness.
In the cutting step (step S2), the control unit 60 uses the cutting unit 20 to cut the ear portions 2a (see FIG. 4) at both ends in the width direction of the glass film 2 formed in the forming step (step S1) by laser cutting. To do.
In the removing step (step S3), the control unit 60 uses the cullet removing unit 30 to attach the glass cullet attached to the cut ends at both ends in the width direction of the glass film 2 cut from the ear portion 2a by the cutting step (step S2). Remove C (see FIG. 5).
In the winding process (step S4), the controller 60 rotates the winding core 4, and winds the glass film 2 from which the glass cullet C has been removed in the removing process (step S3) together with the protective sheet 3 in a roll shape. .

As mentioned above, according to the manufacturing method of the glass roll of this embodiment, after cut | disconnecting the ear | edge part 2a of the width direction both ends of the glass film 2 by laser cleaving, the width direction of the glass film 2 by which the ear | edge part 2a was cut | disconnected The glass cullet C adhering to the cut ends of both ends is removed, and then the glass film 2 from which the glass cullet C has been removed is rolled up together with the protective sheet 3 in a roll shape.
For this reason, the glass roll 1 which is hard to receive the influence of the glass cullet C which generate | occur | produced by the cutting | disconnection of the edge part of the glass film 2, and cannot generate | occur | produce a fracture | rupture at the time of use can be manufactured.

Moreover, according to the manufacturing method of the glass roll of this embodiment, until the glass cullet C is removed after the ear | edge part 2a is cut | disconnected so that the cutting | disconnection edge part of the glass film 2 may be maintained non-contactingly. It has become.
Specifically, between the cutting part 20 and the cullet removing part 30, the glass film 2 is transported by a transport roller 52 that is non-contact with the cutting end part of the glass film 2, so that the cutting end part is non-contact. To be maintained.
For this reason, it is possible to prevent the glass cullet C from coming into contact with the conveyance roller 52 during the conveyance, causing stress concentration, and generating microcracks or the like in the glass film 2.

Moreover, according to the manufacturing method of the glass roll of this embodiment, while blowing out gas by the blowing parts 32 and 32 distribute | arranged along the cutting | disconnection edge part of the glass film 2, and blowing off the glass cullet C, The glass cullet C blown off is sucked and removed by suction portions 31, 31, 31 arranged along the cut end portion.
For this reason, the glass cullet C adhering to the glass film 2 (ear part 2a) is sucked out after being blown off. Therefore, the glass cullet C can be reliably removed and recovered.

<Modification>
Next, a modification of the above embodiment will be described.
In the said embodiment, as a manufacturing method of a glass roll, the case where it has four processes, a formation process (step S1), a cutting process (step S2), a removal process (step S3), and a winding process (step S4) is illustrated. However, in this modification, instead of the forming step (step S1), as shown in FIG. 8, a flexible glass film having a predetermined thickness is supplied from a glass roll wound into a roll shape. Supply step (step S5).
In this case, the glass roll manufacturing apparatus 100 </ b> A includes a supply unit 70 instead of the forming unit 10 as illustrated in FIG. 7.
The supply unit 70 includes a glass roll 7 </ b> R wound around the core 7 and a drive unit (not shown) that rotationally drives the core 7, and rotationally drives the core 7 as the drive unit is driven. Thus, the glass film 2 is fed out in the direction of the cutting part 20 from the glass roll 7R.
Even with such a method for producing a glass roll, it is possible to produce a glass roll 1 that is not easily affected by the glass cullet C generated by cutting a part of the glass film 2 and is less likely to break during use.
In addition to the above-described modification, it is also possible to have, for example, a processing step of continuously processing the glass film 2 without winding it into a roll before the winding step (step S4).

  Note that the present invention is not limited to the above-described embodiments and modifications, and can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above-described embodiment and modification, the cullet removing unit 30 has been described as including the blowing units 32 and 32 and the suction units 31, 31, and 31. However, the blowing unit 32 and 32 or the suction unit 31 is described. , 31, 31 may be provided.

  Moreover, in the said embodiment and modification, although demonstrated as blowing off air from the blowing parts 32 and 32, the injection material which blows off from the blowing parts 32 and 32 is not limited to gas, In addition to this, for example, dry A liquid or solid such as ice, bubble water, water, steam, or a mixture obtained by mixing these may be blown out.

  Moreover, in the said embodiment and modification, although illustrated the structure which wound up the glass film 2 with the protection sheet 3 as the glass roll 1, the structure which wound up only the glass film 2 without the protection sheet 3 was demonstrated. It may be.

  Further, the cullet removing unit 30 may have any configuration as long as it can remove the glass cullet C attached to the glass film 2 after the cutting step, and is not limited to the configuration including the blowing means and the suction means. .

For example, in the conveyance path of the glass film 2, a pressing member that presses the adhesive film against the cut end of the glass film 2 may be provided downstream from the cutting unit 20 as a cullet removing unit. In this case, the glass cullet C is removed by pressing the adhesive sheet along the cut end portion of the glass film 2 from which the ear portion 2a has been cut.
Moreover, in the conveyance path of the glass film 2, the structure which provides the washing tank for ultrasonically cleaning the glass film 2 as a cullet removal part downstream from the cutting part 20 can also be set. In this case, when the glass film 2 passes through the washing tank, the glass cullet C attached to the glass film 2 is removed.

DESCRIPTION OF SYMBOLS 1 Glass roll 2 Glass film 3 Protective sheet 4 Core 100, 100A Glass roll manufacturing apparatus 10 Molding part 10A Molding zone 10B Slow cooling zone 10C Cooling zone 11 Molded body 11a Lower end part 12 Cooling roller 20 Cutting part 30 Caret removal part 30L , 30R Removal mechanism 31 Suction part (suction means)
31a Slit suction port 31b Individual suction pipe 32 Blowout part (blowout means)
32a Blowing nozzle 32b Individual air piping 33 Current plate 34 Main suction piping 34a Suction valve 35 Vacuum suction means 36 Main air piping 36a Supply valve 37 Air supply means 38 Air filter 39 Ionizer 40 Drive unit 51 Support rollers 52 to 55 Transport roller 60 Control Part 70 supply part 7 core 2a ear part 3R protective sheet roll C glass cullet

Claims (7)

A method for producing a glass roll obtained by winding a glass film into a roll,
A molding step of molding a flexible glass film having a predetermined thickness;
A cutting step of cutting a part of the glass film formed in the forming step by laser cutting;
A removal step of removing the glass cullet attached to the cut end of the glass film cut by the cutting step,
A winding step of winding the glass film from which the glass cullet has been removed by the removing step into a roll;
The manufacturing method of the glass roll characterized by having. A method for producing a glass roll obtained by winding a glass film into a roll,
A supplying step of supplying a flexible glass film having a predetermined thickness from a glass roll wound into a roll;
A cutting step of cutting a part of the glass film supplied from the supplying step by laser cutting;
A removal step of removing the glass cullet attached to the cut end of the glass film cut by the cutting step,
A winding step of winding the glass film from which the glass cullet has been removed by the removing step into a roll;
The manufacturing method of the glass roll characterized by having.   The method for producing a glass roll according to claim 1 or 2, wherein the cut end portion of the cut glass film is maintained in a non-contact manner from the cutting step to the removing step.   During the period from the cutting step to the removing step, the cut glass film is conveyed by a conveyance roller that is in non-contact with the cut end of the glass film, so that the cut end is maintained in a non-contact state. The manufacturing method of the glass roll of Claim 3 characterized by the above-mentioned. The removal step includes
The blowout means disposed along the cut end of the cut glass film blows out gas, liquid, or solid, and blows off the glass cullet to remove it. A method for producing a glass roll according to claim 1. The removal step includes
The glass roll according to any one of claims 1 to 5, wherein the glass cullet is sucked and removed by a suction means arranged along the cut end of the cut glass film. Manufacturing method. The removal step includes
The glass roll manufacturing method according to any one of claims 1 to 4, wherein the glass cullet is removed by pressing an adhesive sheet along the cut end of the cut glass film. .

Images