CN107001104B - Method for cutting glass film - Google Patents
Method for cutting glass film Download PDFInfo
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- CN107001104B CN107001104B CN201680003661.7A CN201680003661A CN107001104B CN 107001104 B CN107001104 B CN 107001104B CN 201680003661 A CN201680003661 A CN 201680003661A CN 107001104 B CN107001104 B CN 107001104B
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- effective portion
- glass film
- cutting
- roller
- film according
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/0235—Ribbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/03—Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The cutting method of the glass film comprises the following steps: a cutting and separating step of continuously cutting the belt-shaped glass film (G) during conveyance by a laser cutting method to separate the non-effective part (Ga) and the effective part (Gb) of the belt-shaped glass film (G); and a separation step of separating the non-effective section (Ga) and the effective section (Gb) separated from each other in the thickness direction, wherein during the separation step, a first external force (F1) having a component in the thickness direction is applied to each of two portions of the effective section (Gb) separated from each other in the width direction, and a second external force (F2) having a component in the thickness direction opposite to the first external force (F1) is applied to a portion located between the two portions, thereby performing a deformation imparting step of bending and deforming the effective section (Gb) in the width direction.
Description
Technical Field
The present invention relates to a method for cutting a glass film, the method including a step of separating an effective portion and an ineffective portion of a belt-shaped glass film during conveyance by cutting by a laser cutting method, and a step of separating the separated effective portion and ineffective portion in a thickness direction.
Background
As is well known, plate glass used for Flat Panel Displays (FPD) such as liquid crystal displays, plasma displays, and organic EL displays has been increasingly thinned with an increase in demand for weight reduction, and glass films having a thickness of 300 μm or less or 200 μm or less have been developed and manufactured.
As a process for producing the glass film, there is a process of separating an ineffective portion present at each end in the width direction from an effective portion present between two ineffective portions by cutting by a laser cutting method while conveying a belt-shaped glass film, which is a source of the glass film, in a flat posture (hereinafter, referred to as a cutting and separating process). For example, in order to wind only the effective portion into a roll shape to form a glass roll, a step (hereinafter, referred to as a separation step) of separating the ineffective portion from the conveyance path of the effective portion and separating the effective portion and the ineffective portion in the thickness direction is performed for both the effective portion and the ineffective portion after separation.
However, since only a gap having an extremely narrow width exists between the effective portion and the non-effective portion after the dicing step is performed, there is a case where a problem such as breakage of the effective portion occurs due to inevitable contact between the effective portion and the non-effective portion during the step of separating from each other. Specifically, the impact generated by the contact with the non-effective portion causes micro-cracks included in the end portions of the effective portion in the width direction to develop, and the effective portion is broken. Thus, a method for eliminating such a problem is disclosed in patent document 1.
In the method disclosed in this document, the width-direction both ends of each of the separated effective and ineffective portions are supported by rollers from the lower surface side, and the effective and ineffective portions are bent and deformed in the width direction by their own weight. Thus, the width of the gap formed between the effective portion and the ineffective portion is expanded along with the bending deformation of the effective portion and the ineffective portion, thereby avoiding the contact between the effective portion and the ineffective portion in the process of executing the separation process.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2012-31031
Disclosure of Invention
Problems to be solved by the invention
However, the method disclosed in patent document 1 has the following unsolved problems. That is, when the effective portion and the ineffective portion have a large thickness (for example, a thickness of 200 μm or more) and the width is small, the bending rigidity of the effective portion and the ineffective portion becomes large and bending deformation due to the own weight becomes difficult. Therefore, it is difficult to expand the width of the gap formed between the two to a width sufficient to avoid contact of the two during the execution of the remote process.
In view of the above, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to avoid contact between an effective portion and an ineffective portion of a belt-like glass film during conveyance when the effective portion and the ineffective portion are separated from each other by cutting by a laser cutting method and then the effective portion and the ineffective portion are separated from each other in a thickness direction.
Means for solving the problems
The method for cutting a glass film according to the present invention, which has been accomplished to solve the above problems, includes: a cutting and separating step of continuously cutting the belt-shaped glass film in the process of being conveyed in a horizontal posture along the length direction by using a laser cutting method, thereby separating the ineffective parts respectively existing at the two ends of the belt-shaped glass film in the width direction from the effective part existing between the two ineffective parts; and a separation step of separating the separated ineffective part from the conveyance path of the separated effective part to separate the ineffective part and the effective part in a thickness direction, wherein a first external force having a thickness direction component is applied to each of two portions of the effective part separated from each other in the width direction, and a second external force having a thickness direction component opposite to the first external force is applied to a portion located between the two portions to thereby perform a deformation imparting step of bending and deforming the effective part in the width direction. Here, "during conveyance in a flat posture" refers to a case where the ribbon-shaped glass film is conveyed in a posture parallel to the horizontal plane, or a case where the ribbon-shaped glass film is conveyed in a posture inclined in a range of 45 ° or less with respect to the horizontal plane. In addition, "external force" does not include gravity.
According to such a method, the effective portion during the step of separating from the deformation imparting step is forcibly bent and deformed in the width direction by the first external force and the second external force having the thickness direction components opposite to each other with the execution of the deformation imparting step. This can enlarge the width of the gap formed between the effective portion and the non-effective portion in accordance with the amount of bending deformation of the effective portion in the width direction. As a result, contact between the effective portion and the ineffective portion during the execution of the separation process can be avoided.
In the above method, the first external force may be applied by two support rollers that support the lower surface of the effective portion, and the second external force may be applied by the fluid ejected toward the upper surface of the effective portion.
In this way, the effective portion can be bent and deformed so that the lower surface of the effective portion protrudes in the width direction by the force applied to the effective portion from each of the two support rollers and the force applied to the effective portion by the ejected fluid.
In the above method, preferably, an intermediate roller that supports a lower surface of the fluid-jetted portion of the effective portion is disposed between the two support rollers, and a height position at which the intermediate roller supports the effective portion is located below the two support rollers.
If the pressure of the fluid ejected toward the upper surface of the effective portion is too high, the lower surface of the effective portion may protrude excessively, and the effective portion may fall off the two support rollers. However, if the intermediate roller is disposed between the two support rollers, the protrusion of the lower surface of the effective portion can be restricted by the intermediate roller even when the force applied to the effective portion by the fluid becomes large. Thus, when the effective portion is bent and deformed, it is not necessary to precisely adjust the pressure of the ejected fluid in order to prevent the effective portion from falling off.
In the above method, the intermediate roller may be a roller having a rotation shaft common to the two backup rollers and having a smaller diameter than the two backup rollers.
In this way, since the intermediate roller and the two support rollers have a common rotation shaft, there is no need to provide a rotation shaft of the intermediate roller and a rotation shaft of the two support rollers, respectively, and an increase in the number of rotation shafts can be avoided. Thus, the equipment cost can be suppressed.
In the above method, it is preferable that the two backup rolls and the intermediate roll are free rolls.
When a difference occurs in the peripheral speed between the three of the two support rollers and the intermediate roller, the effective portion may slide on the support rollers or the intermediate roller, and scratches may occur in the effective portion. However, if the two support rollers and the intermediate roller are free rollers, both the two support rollers and the intermediate roller rotate at a peripheral speed equal to the moving speed of the effective portion by friction with the effective portion. Thus, the occurrence of scratches on the effective portion can be prevented.
In the above method, it is preferable that the two support rollers are symmetrically arranged with respect to the widthwise center of the effective portion, and the fluid is ejected toward the widthwise center of the effective portion.
In this way, the effective portion is symmetrically bent and deformed with respect to the center in the width direction. This makes it possible to uniformly widen the width of the gap formed between the effective portion and one of the ineffective portions and the width of the gap formed between the effective portion and the other ineffective portion. Further, since the fluid is ejected toward the center in the width direction of the both ends in the width direction away from the effective portion, the both ends in the width direction can be prevented from being swung as much as possible by the ejection of the fluid. As a result, contact between the effective portion and the ineffective portion during the execution of the separation process can be avoided more stably.
In the above method, it is preferable that both ends in the width direction of the effective portion are supported by two support rollers, respectively.
In this way, the distance between the two portions to which the first external force is applied can be increased as much as possible. Therefore, the effective portion is easily bent and deformed.
In the above method, the first external force may be applied by the fluid ejected to the two locations on the upper surface of the effective portion, and the second external force may be applied by a support roller that supports the lower surface of the effective portion.
In this way, the effective portion can be bent and deformed so that the upper surface of the effective portion is convex in the width direction by the force applied to the effective portion by the fluid ejected to the two locations, respectively, and the force applied to the effective portion from the support roller.
In the above method, it is preferable that the edge rollers are disposed on one side and the other side, respectively, so as to sandwich the backup roller in the width direction, the edge rollers support both width-direction end portions of the effective portion from the lower surface side, respectively, and a height position at which the edge rollers support the effective portion is located below the backup roller.
If the pressure of the fluid ejected to each of the two locations on the upper surface of the effective portion is too high, the effective portion is in a state of being excessively bent and deformed (a state in which the curvature is excessively large), and the effective portion may be broken by the stress generated by the bending and deformation. However, if the edge rollers are disposed on one side and the other side, respectively, so as to sandwich the backup roller in the width direction, it is possible to restrict excessive bending deformation of the effective portion regardless of how large the force applied to the effective portion by the fluid becomes. Thus, when the effective portion is bent and deformed, it is not necessary to precisely adjust the pressure of the ejected fluid in order to prevent the effective portion from being broken.
In the above method, it is preferable that the backup roll and the edge roll are free rolls.
When a difference occurs in the peripheral speed between the backup roll and the edge roll, the effective portion may slide on the backup roll or the edge roll, and scratches may be generated on the effective portion. However, if the backup roller and the edge roller are free rollers, both the backup roller and the edge roller rotate at a peripheral speed equal to the moving speed of the effective portion by friction with the effective portion. Thus, the occurrence of scratches on the effective portion can be prevented.
In the above method, it is preferable that the two portions to be ejected with the fluid are symmetric with respect to the widthwise center of the effective portion, and the widthwise center of the effective portion is supported by the support roller.
In this way, the effective portion is symmetrically bent and deformed with respect to the center in the width direction. This makes it possible to uniformly widen the width of the gap formed between the effective portion and one of the ineffective portions and the width of the gap formed between the effective portion and the other ineffective portion. As a result, contact between the effective portion and the ineffective portion during the execution of the separation process can be avoided more stably.
In the above method, it is preferable that the support roller has a symmetrical shape with respect to the widthwise center of the effective portion and has a diameter gradually decreasing toward the widthwise outer side.
In this way, the diameter of the support roller is gradually reduced toward the outer side in the width direction, and therefore the effective portion that is symmetrically bent and deformed with respect to the center in the width direction can be supported in accordance with the bending. Therefore, the swing of the effective portion associated with the ejection of the fluid can be suppressed, and the contact between the effective portion and the ineffective portion during the execution of the separation step can be avoided more stably.
In the above method, the first external force may be applied by two support rollers that support the lower surface of the effective portion, and the second external force may be applied by sucking the lower surface of the effective portion.
In this way, the effective portion can be bent and deformed so that the lower surface of the effective portion protrudes in the width direction by the force applied to the effective portion from each of the two support rollers and the force applied to the effective portion by suction.
In the above method, preferably, the intermediate roller is disposed between the two support rollers, the intermediate roller has a suction hole in an outer peripheral portion thereof for sucking a lower surface of the effective portion, and a height position at which the intermediate roller supports the effective portion is located below the two support rollers.
If the suction force for sucking the lower surface of the effective portion is too large, the lower surface of the effective portion may protrude excessively, and the effective portion may fall off from the two support rollers. However, if the intermediate roller having the suction holes in the outer peripheral portion is disposed between the two support rollers, the projection of the lower surface of the effective portion can be restricted by the intermediate roller itself that sucks the effective portion, regardless of how much force is applied to the effective portion by the suction. Thus, when the effective portion is bent and deformed, it is not necessary to precisely adjust the pressure of the ejected fluid in order to prevent the effective portion from falling off.
In the above method, the intermediate roller may be a roller having a rotation shaft common to the two backup rollers and having a smaller diameter than the two backup rollers.
In this way, since the intermediate roller and the two support rollers have a common rotation shaft, there is no need to provide a rotation shaft of the intermediate roller and a rotation shaft of the two support rollers, respectively, and an increase in the number of rotation shafts can be avoided. Thus, the equipment cost can be suppressed.
In the above method, it is preferable that the two backup rolls and the intermediate roll are free rolls.
When a difference occurs in the peripheral speed between the three of the two support rollers and the intermediate roller, the effective portion may slide on the support rollers or the intermediate roller, and scratches may occur in the effective portion. However, if the two support rollers and the intermediate roller are free rollers, both the two support rollers and the intermediate roller rotate at a peripheral speed equal to the moving speed of the effective portion by friction with the effective portion. Thus, the occurrence of scratches on the effective portion can be prevented.
In the above method, it is preferable that the two support rollers are symmetrically arranged with respect to the widthwise center of the effective portion, and the widthwise center of the effective portion is sucked.
In this way, the effective portion is symmetrically bent and deformed with respect to the center in the width direction. This makes it possible to uniformly widen the width of the gap formed between the effective portion and one of the ineffective portions and the width of the gap formed between the effective portion and the other ineffective portion. As a result, contact between the effective portion and the ineffective portion during the execution of the separation process can be avoided more stably.
In the above method, it is preferable that both ends in the width direction of the effective portion are supported by two support rollers, respectively.
In this way, the distance between the two portions to which the first external force is applied can be increased as much as possible. Therefore, the effective portion is easily bent and deformed.
In the above method, the first external force may be applied by sucking two portions on the lower surface of the effective portion, and the second external force may be applied by a support roller that supports the lower surface of the effective portion.
In this way, the effective portion can be bent and deformed so that the upper surface of the effective portion is convex in the width direction by the force applied to the effective portion by sucking the two portions and the force applied to the effective portion from the support roller.
In the above method, the thickness of the ribbon-shaped glass film may be in a range of 200 μm to 300 μm.
When the thickness of the ribbon-shaped glass film is 200 μm or more, the bending rigidity in the width direction of the effective portion after the dicing step becomes large, and the effective portion is less likely to be bent and deformed by its own weight. However, according to the present invention, even when the thickness of the ribbon-shaped glass film is 200 μm or more, the effective portion after the cutting and separating step can be forcibly bent and deformed in the width direction by the first external force and the second external force. Therefore, the present invention is preferably applied in the case where the ribbon glass film has the above-described thickness.
Effects of the invention
As described above, according to the present invention, after the effective portion and the ineffective portion of the belt-shaped glass film during conveyance are separated by cutting by the laser cutting method, contact between the effective portion and the ineffective portion can be avoided when the effective portion and the ineffective portion are separated in the thickness direction.
Drawings
Fig. 1 is a plan view showing a method of cutting a glass film according to a first embodiment of the present invention.
Fig. 2 is a longitudinal sectional front view showing a method of cutting a glass film according to a first embodiment of the present invention.
Fig. 3 is a front view showing a method of cutting a glass film according to a first embodiment of the present invention.
Fig. 4 is a front view in longitudinal section showing a method for cutting a glass film according to a second embodiment of the present invention.
Fig. 5 is a front view showing a method of cutting a glass film according to a second embodiment of the present invention.
Fig. 6 is a front view in longitudinal section showing a method for cutting a glass film according to a third embodiment of the present invention.
Fig. 7 is a front view in vertical section showing a method for cutting a glass film according to a fourth embodiment of the present invention.
Detailed Description
Hereinafter, a method for cutting a glass film according to an embodiment of the present invention will be described with reference to the drawings. In the embodiments described below, a strip-shaped glass film having a thickness of 200 to 300 μm is to be cut, but the present invention is not limited thereto, and a strip-shaped glass film having a thickness of less than 200 μm may be cut.
< first embodiment >
First, a method for cutting a glass film according to a first embodiment of the present invention will be described.
As shown in fig. 1, the method for cutting a glass film according to the first embodiment of the present invention includes: a cutting and separating step of continuously cutting the belt-shaped glass film G in the process of being conveyed in a flat posture along the length direction by a laser cutting method, thereby separating the ineffective parts Ga respectively existing at the two ends of the belt-shaped glass film G in the width direction and the effective parts Gb existing between the two ineffective parts Ga; and a separation step of separating the separated ineffective part Ga from the transport path of the separated effective part Gb, thereby separating the ineffective part Ga and the effective part Gb in the thickness direction (up and down).
In addition, as shown in fig. 2, in the glass film cutting method, during the separation process, a first external force F1 having a thickness direction component is applied to two portions of the effective portion Gb, which are separated from each other in the width direction, and a second external force F2 having a thickness direction component opposite to the first external force F1 is applied to a portion located between the two portions, thereby performing a deformation imparting process of bending and deforming the effective portion Gb in the width direction. By executing the deformation imparting step, the width of the gap formed between the effective portion Gb and the non-effective portion Ga is increased, thereby avoiding contact between the effective portion Gb and the non-effective portion Ga during execution of the step apart from the step. The effective portion Gb after the deformation imparting step (separation step) is wound in a roll shape to form a glass roll.
The ribbon-shaped glass film G to be cut in the cutting and separating step is a glass film continuously wound from a glass roll formed by winding the ribbon-shaped glass film G in a roll shape. Then, the rolled-out ribbon-shaped glass film G is conveyed horizontally by a conveying mechanism (e.g., a belt conveyor) in a direction indicated by an arrow T in fig. 1. The thickness of the ribbon-shaped glass film G is in the range of 200 μm to 300. mu.m.
In the cutting and separating step, a heating region H that is locally heated by irradiation of a laser beam and a cooling region C that is locally cooled by injection of a refrigerant (for example, atomized water or the like) are continuously formed along a line to cut X that is a boundary between the effective portion Gb and the non-effective portion Ga of the ribbon-shaped glass film G. As a result, the ribbon-shaped glass film G is continuously cut by the thermal stress generated by the temperature difference between the two regions, and the effective portion Gb and the ineffective portion Ga of the ribbon-shaped glass film G are separated. The separated effective part Gb and non-effective part Ga are horizontally conveyed in parallel.
In the present embodiment, the ribbon-shaped glass film G continuously wound from the glass roll is to be cut, but the present invention is not limited thereto. For example, as a modification, a ribbon-shaped glass film G continuously formed by a downdraw method may be a target of cutting. In addition, although the present embodiment is a mode in which the belt-shaped glass film G conveyed horizontally is cut, as a modification, a mode in which the belt-shaped glass film G conveyed in an inclined direction inclined in a range of 45 ° or less with respect to the horizontal plane may be cut. However, the smaller the inclination with respect to the horizontal plane, the better, the lower the inclination with respect to the horizontal plane, the more preferably 20 ° or less, the more preferably 10 ° or less, and the further preferably 5 ° or less.
In the separating step, among the effective part Gb and the ineffective part Ga, which are separated and horizontally conveyed in parallel, the effective part Gb is continuously conveyed horizontally, and the ineffective part Ga is pulled out downward from the conveying path of the effective part Gb and separated therefrom. This separates the effective portion Gb and the non-effective portion Ga in the thickness direction.
Here, the mode of separating the separated effective portion Gb and non-effective portion Ga in the thickness direction is not limited to the mode as in the present embodiment. For example, as a modification, when the tape-shaped glass film G is cut while being conveyed in an oblique direction inclined with respect to the horizontal plane to separate the effective portion Gb and the non-effective portion Ga, the separation step may be performed as follows. That is, the effective part Gb may be separated from the ineffective part Ga in the thickness direction by continuously conveying the effective part Gb in the oblique direction and horizontally pulling out the ineffective part Ga from the conveying path of the effective part Gb.
For the effective part Gb when the deformation imparting process is performed, the first external force F1 is applied by the two supporting rollers 1 supporting the lower surface Gbb of the effective part Gb, respectively, and the second external force F2 is applied by the air a as a fluid ejected toward the upper surface Gba of the effective part Gb. As a result, the effective portion Gb is forcibly bent and deformed in the width direction in the vicinity of the two support rollers 1 on the conveyance path of the effective portion Gb without depending on its own weight. During the bending deformation of the effective portion Gb, the non-effective portion Ga is separated from the conveyance path of the effective portion Gb as the separation step is performed.
An intermediate roller 2 is disposed between the two backup rollers 1, and the intermediate roller 2 supports the lower surface Gbb of the portion of the effective portion Gb where the air a is ejected, and the height position at which the effective portion Gb is supported is located below the two backup rollers 1. In addition, when the strain applying step is performed, the non-effective portion Ga is supported by the roller 3 before the non-effective portion Ga is separated from the conveyance path of the effective portion Gb.
The two support rollers 1 and the intermediate roller 2 are disposed at the following positions: the position is separated from the position where the laser dicing process is performed in the dicing/separating step (the position where the heating region H and the cooling region C of the ribbon-shaped glass film G are formed) toward the downstream side along the conveyance path of the effective portion Gb. It is preferable that the distance from the position where the laser dicing method is performed to the two anvil rolls 1 and the intermediate roll 2 is a distance at which the stress acting on the effective portion Gb does not propagate to the position where the laser dicing method is performed due to the bending deformation of the effective portion Gb.
The two support rollers 1 are symmetrically arranged with respect to the widthwise center Gbc of the effective portion Gb, and support one side and the other side end Gbd of the effective portion Gb in the width direction. Thereby, the first external force F1 (force for supporting the effective portion Gb) is applied to the effective portion Gb from each of the two supporting rollers 1. Each of the intermediate rollers 2 is a roller elongated in the width direction of the effective portion Gb and has a smaller diameter than the two backup rollers 1. Both the two backup rollers 1 and the intermediate roller 2 are free rollers and rotate by friction with the effective portion Gb. The two support rollers 1 and the intermediate roller 2 have a common rotation shaft 4.
The air a is ejected from the air ejector 5 toward the width direction center Gbc of the effective portion Gb. Thereby, the second external force F2 (a force pressing the effective portion Gb downward) is applied to the effective portion Gb by the air a. Only one air ejector 5 is disposed above the center Gbc in the width direction of the effective portion Gb. In the present embodiment, the effective portion Gb is symmetrically bent and deformed with respect to the width direction center Gbc by the second external force F2 and the first external force F1.
The roller 3 is a free roller that is disposed outside the backup roller 1 in the width direction and rotates around the rotation shaft 6. The rotary shaft 6 is disposed at the same height as the rotary shafts 4 of the two backup rolls 1 and the intermediate roll 2. The diameter of the roller 3 is smaller than that of the backup roller 1, and is the same as that of the intermediate roller 2. Accordingly, a difference in height occurs between the effective portion Gb (end Gbd) supported by the support roller 1 and the ineffective portion Ga supported by the roller 3 due to a difference in diameter between the rollers 1 and 3, and therefore contact between the effective portion Gb (end Gbd) and the ineffective portion Ga is more easily avoided.
As shown in fig. 3, when the two backup rolls 1 and the intermediate roll 2 are viewed from the front, the size of the angle θ 1 at which the straight line connecting two points, i.e., the middle point of the top portion (the portion in contact with the lower surface Gbb of the effective portion Gb) of the intermediate roll 2 and the contact point of the backup roll 1 in contact with the lower surface Gbb of the effective portion Gb, is inclined with respect to the horizontal line is preferably in the following range. That is, if the angle θ 1 is too small, the effective portion Gb is not sufficiently bent and deformed in the width direction, and the width of the gap formed between the effective portion Gb and the non-effective portion Ga may not be sufficiently increased. On the other hand, if the angle θ 1 is too large, the curvature of the effective portion Gb that is bent in the width direction increases, and the possibility that the stress acting on the effective portion Gb propagates to the position where the laser dicing method is performed along with the bending deformation of the effective portion Gb increases. Therefore, the angle θ 1 is preferably 0.5 ° to 5 °, more preferably 0.7 ° to 3 °, and most preferably 1 ° to 2 °.
Here, in the present embodiment, the second external force F2 is applied to the effective part Gb by ejecting the air a as a fluid toward the upper surface Gba of the effective part Gb, but the present invention is not limited thereto. As a modification, the second external force F2 may be applied to the effective portion Gb by ejecting another gas or liquid. The portion for ejecting the air a does not necessarily have to be the width direction center Gbc of the effective portion Gb, and may be a portion located between the two backup rollers 1 in the effective portion Gb. Therefore, as a modification, the air a may be ejected toward a portion deviated from the center Gbc in the width direction of the effective portion Gb. Further, as a modification, a plurality of air ejectors 5 may be arranged, and the air a may be ejected toward a plurality of locations of the effective portion Gb (a plurality of locations located between the two backup rollers 1) by the plurality of air ejectors 5. In this case, the effective portion Gb is applied with the plurality of second external forces F2.
In the present embodiment, the intermediate roller 2 is a roller elongated in the width direction, but is not limited thereto. The intermediate roller 2 may support the lower surface Gbb of the effective portion Gb where the air a is ejected. Therefore, as a modification, the intermediate roller 2 may be a roller having a short strip shape in the width direction, and may support only the lower surface Gbb of the portion where the air a is ejected. Further, the two support rollers 1 and the intermediate roller 2 do not necessarily have to be free rollers, and a drive roller may be used as a modification. In this case, in order to prevent scratches from occurring on the lower surface Gbb of the effective portion Gb, it is preferable to set the peripheral speed to be the same between the two backup rollers 1 and the intermediate roller 2. The portions supported by the two support rollers 1 may not be the end portions Gbd on one side and the other side in the width direction of the effective portion Gb, and may be portions offset inward in the width direction from the end portions Gbd as a modification.
In the present embodiment, a step is generated between the effective portion Gb (end Gbd) and the ineffective portion Ga in order to easily avoid contact between the effective portion Gb (end Gbd) and the ineffective portion Ga. To achieve this, the rotary shafts 4 of the two backup rolls 1 and the intermediate roll 2 and the rotary shaft 6 of the roll 3 are disposed at the same height position, and the diameter of the roll 3 is made smaller than the diameter of the backup roll 1 and the same as the diameter of the intermediate roll 2. However, the present invention is not limited to this, and when a level difference is generated between the effective portion Gb (end Gbd) and the ineffective portion Ga, the height position at which the roller 3 supports the ineffective portion Ga may be set lower than the height position at which the backup roller 1 supports the effective portion Gb (end Gbd). Therefore, for example, the diameter of the roller 3 may be made smaller than that of the intermediate roller 2, unlike the present embodiment. For example, the diameter of the backup roll 1 and the diameter of the roll 3 may be the same, and the rolls 1 and 3 may be arranged such that the rotation shaft 6 of the roll 3 is located below the rotation shafts 4 of the two backup rolls 1 and the intermediate roll 2.
According to the method for cutting a glass film of the first embodiment, the effective portion Gb during the process of separating from the process is forcibly bent and deformed in the width direction by the first external force F1 and the second external force F2 having the thickness direction components opposite to each other as the deformation imparting process is performed. This allows the width of the gap formed between the effective portion Gb and the non-effective portion Ga to be increased according to the amount of bending deformation of the effective portion Gb in the width direction. As a result, contact between the effective portion Gb and the non-effective portion Ga during the execution of the remote step can be avoided.
< second embodiment >
A method for cutting a glass film according to a second embodiment of the present invention will be described below. In the description of the second embodiment, the same reference numerals are given to the elements already described in the above-described first embodiment in the drawings referred to in the description of the second embodiment, and overlapping descriptions are omitted, and only the differences from the first embodiment will be described.
As shown in fig. 4, the method for cutting a glass film according to the second embodiment of the present invention is different from the method for cutting a glass film according to the first embodiment in the following three points. (1) In the deformation imparting step, the first external force F1 is applied by ejecting air a to two locations on the upper surface Gba of the effective part Gb, and the second external force F2 is applied by the backup roller 1 that supports the lower surface Gbb of the effective part Gb. (2) The shape and arrangement of the support roller 1 are different. (3) The edge rollers 7 are disposed on one side and the other side, respectively, so as to sandwich the backup roller 1 in the width direction, and the edge rollers 7 support the end portions Gbd on the one side and the other side in the width direction of the effective portion Gb from the lower surface Gbb side, respectively.
The two portions where the air a is ejected are formed at symmetrical positions with respect to the center Gbc in the width direction of the effective portion Gb. Then, the first external force F1 (force pressing the effective portion Gb downward) is applied to the effective portion Gb by the air a ejected to the two portions, respectively.
The backup roller 1 is a roller having a shape symmetrical with respect to the widthwise center Gbc of the effective portion Gb and having a diameter gradually decreasing toward the widthwise outer side. The support roller 1 supports the width direction center Gbc of the effective portion Gb at the center portion where the diameter thereof becomes the largest. Thereby, the second external force F2 (force for supporting the effective portion Gb) is applied to the effective portion Gb from the supporting roller 1 (the central portion of the supporting roller 1). The backup roller 1 is a free roller and rotates by friction with the effective portion Gb.
The edge roller 7 is positioned lower than the backup roller 1 in the height position of the backup effective portion Gb. The edge roll 7 has a diameter smaller than that of the center portion of the backup roll 1 and is the same size as that of the roll 3. The edge roller 7 is a free roller like the backup roller 1, and rotates by friction with the effective portion Gb. The backup roll 1 and the edge roll 7 have a common rotation shaft 8. The rotary shaft 8 is disposed at the same height as the rotary shaft of the roller 3.
As shown in fig. 5, when the backup roller 1 and the two edge rollers 7 are viewed from the front, the size of the angle θ 2 at which the straight line connecting two points, i.e., the contact point of the center portion of the backup roller 1 with the lower surface Gbb of the effective portion Gb and the contact point of the edge roller 7 with the lower surface Gbb of the effective portion Gb, is inclined with respect to the horizontal line is preferably in the following range. That is, for the same reason as the reason for the preferable size indicated by the angle θ 1 in the description of the first embodiment, the angle is preferably 0.5 ° to 5 °, more preferably 0.7 ° to 3 °, and most preferably 1 ° to 2 °.
Here, in the present embodiment, the support roller 1 supports the widthwise center Gbc of the effective portion Gb at the center portion thereof, but is not limited thereto. As a modification, the support roller 1 may support the portion of the effective portion Gb that is offset from the widthwise center Gbc by providing the portion having the largest diameter at a position offset from the center portion of the support roller 1. In addition, as a modification, the supporting roller 1 may support the lower surface Gbb of the effective portion Gb at a plurality of positions. In this case, the effective portion Gb is applied with the plurality of second external forces F2.
The method for cutting a glass film according to the second embodiment can also provide the same operation and effect as those of the method for cutting a glass film according to the first embodiment.
< third embodiment >
A method for cutting a glass film according to a third embodiment of the present invention will be described below. In the description of the third embodiment, the same reference numerals are given to the elements already described in the above-described first embodiment in the drawings referred to in the description of the third embodiment, and overlapping descriptions are omitted, and only the differences from the first embodiment will be described.
As shown in fig. 6, the method for cutting a glass film according to the third embodiment of the present invention is different from the method for cutting a glass film according to the first embodiment in the following two points. (1) In the deformation imparting step, the second external force F2 is applied by attracting the lower surface Gbb of the effective portion Gb. (2) The intermediate roller 2 has suction holes in the outer peripheral portion (the cross-hatched portion in fig. 6) for sucking the lower surface Gbb of the effective portion Gb.
The intermediate roller 2 has a plurality of suction holes formed in the outer peripheral portion thereof, and each suction hole is connected to a negative pressure generating mechanism (e.g., a vacuum pump) for generating a negative pressure. The plurality of suction holes suck the lower surface Gbb of the effective portion Gb as the negative pressure generating mechanism operates. The second external force F2 (a force that draws the effective portion Gb downward) is applied to the effective portion Gb by this suction. The plurality of suction holes are disposed at one position in the center of the intermediate roller 2, and the plurality of suction holes suck the center Gbc in the width direction of the effective portion Gb.
Here, in the present embodiment, the plurality of suction holes formed in the outer peripheral portion of the intermediate roller 2 suck the widthwise center Gbc of the effective portion Gb, but the present invention is not limited thereto. As a modification, a plurality of suction holes may be arranged at positions offset from the center portion of the intermediate roller 2, so that the plurality of suction holes suck the positions offset from the center Gbc in the width direction of the effective portion Gb. As a modification, a plurality of suction holes may be arranged at a plurality of locations of the intermediate roller 2 in the width direction of the effective portion Gb to suck the plurality of locations of the effective portion Gb. In this case, the effective portion Gb is applied with the plurality of second external forces F2.
The method for cutting a glass film according to the third embodiment can also provide the same operation and effect as those of the method for cutting a glass film according to the first embodiment.
< fourth embodiment >
A method for cutting a glass film according to a fourth embodiment of the present invention will be described below. Since the fourth embodiment is similar to the second embodiment described above, in the description of the fourth embodiment, the same reference numerals are given to the elements already described in the second embodiment, and overlapping descriptions are omitted, and only the differences from the second embodiment will be described.
As shown in fig. 7, the method for cutting a glass film according to the fourth embodiment of the present invention is different from the method for cutting a glass film according to the second embodiment in the following two points. (1) The first external force F1 is applied by attracting two locations on the lower surface Gbb of the effective part Gb, respectively. (2) The supporting roller 1 has suction holes in the outer peripheral portion (the cross-hatched portion in fig. 7) for sucking the lower surface Gbb of the effective portion Gb.
The support roller 1 has a plurality of suction holes formed in two locations on the outer peripheral portion thereof, and each suction hole is connected to a negative pressure generating mechanism (e.g., a vacuum pump) for generating a negative pressure. The plurality of suction holes suck the lower surface Gbb of the effective portion Gb as the negative pressure generating mechanism operates. The first external force F1 (force that draws the effective portion Gb downward) is applied to two portions of the effective portion Gb by this suction. In the backup roller 1, two portions in which a plurality of suction holes are formed are symmetrically arranged with respect to the widthwise center Gbc of the effective portion Gb.
The method for cutting a glass film according to the fourth embodiment can also provide the same operation and effect as those of the method for cutting a glass film according to the first embodiment.
Here, the method for cutting a glass film of the present invention is not limited to the embodiment described in each of the above embodiments. For example, as a modification of the first and third embodiments described above, the intermediate roller may have the same diameter as the two support rollers and be disposed below the two support rollers.
Description of reference numerals:
1, supporting rollers;
2, an intermediate roller;
4 a rotating shaft;
7 edge rollers;
8 rotating the shaft;
g a band-shaped glass film;
a Ga inactive portion;
a Gb effective part;
a Gba upper surface;
a lower Gbb surface;
gbc width direction center;
gbd end portions;
a, air;
f1 first external force;
f2 second external force.
Claims (20)
1. A method of cutting a glass film, comprising:
a cutting and separating step of continuously cutting the belt-shaped glass film in the process of being conveyed in a horizontal posture along the length direction by using a laser cutting method, thereby separating the ineffective parts respectively existing at the two ends of the belt-shaped glass film in the width direction from the effective part existing between the two ineffective parts; and
a separation step of separating the separated ineffective part from the transport path of the separated effective part to separate the ineffective part from the effective part in the thickness direction,
the cutting method of the glass film is characterized in that,
in the step of performing the separation step, a first external force having a thickness direction component is applied to each of two portions of the effective portion that are separated from each other in the width direction, and a second external force having a thickness direction component opposite to the first external force is applied to a portion located between the two portions, thereby performing a deformation imparting step of bending and deforming the effective portion in the width direction.
2. The method for cutting a glass film according to claim 1,
the first external force is applied by two support rollers that support the lower surface of the effective portion, respectively, and the second external force is applied by a fluid that is ejected toward the upper surface of the effective portion.
3. The method for cutting a glass film according to claim 2,
an intermediate roller is disposed between the two support rollers, the intermediate roller supporting a lower surface of a portion of the effective portion where the fluid is ejected, and a height position at which the intermediate roller supports the effective portion is located below the two support rollers.
4. The method for cutting a glass film according to claim 3,
the intermediate roller is a roller having a rotation shaft common to the two support rollers and having a smaller diameter than the two support rollers.
5. The method for cutting a glass film according to claim 3 or 4,
the two support rollers and the intermediate roller are set as free rollers.
6. The method for cutting a glass film according to any one of claims 2 to 4,
the two support rollers are symmetrically arranged with respect to the widthwise center of the effective portion, and eject the fluid toward the widthwise center of the effective portion.
7. The method for cutting a glass film according to any one of claims 2 to 4,
the two support rollers support both ends in the width direction of the effective portion, respectively.
8. The method for cutting a glass film according to claim 1,
the first external force is applied by fluid that is ejected to two locations on the upper surface of the effective portion, respectively, and the second external force is applied by a support roller that supports the lower surface of the effective portion.
9. The method for cutting a glass film according to claim 8,
edge rollers are disposed on one side and the other side of the effective portion so as to sandwich the support roller in the width direction, the edge rollers support both ends in the width direction of the effective portion from the lower surface, and a height position at which the edge rollers support the effective portion is located below the support roller.
10. The method for cutting a glass film according to claim 9,
the backup roller and the edge roller are free rollers.
11. The method for cutting a glass film according to any one of claims 8 to 10,
the two portions to be ejected with the fluid are symmetrically positioned with respect to the center of the effective portion in the width direction, and the center of the effective portion in the width direction is supported by the support roller.
12. The method for cutting a glass film according to claim 11,
the support roller is a roller having a symmetrical shape with respect to the widthwise center of the effective portion and having a diameter that gradually decreases toward the widthwise outer side.
13. The method for cutting a glass film according to claim 1,
the first external force is applied by two support rollers that support the lower surface of the effective portion, respectively, and the second external force is applied by attracting the lower surface of the effective portion.
14. The method for cutting a glass film according to claim 13,
an intermediate roller is disposed between the two support rollers, the intermediate roller having a suction hole in an outer peripheral portion thereof for sucking a lower surface of the effective portion, and a height position at which the intermediate roller supports the effective portion is located below the two support rollers.
15. The method for cutting a glass film according to claim 14,
the intermediate roller is a roller having a rotation shaft common to the two support rollers and having a smaller diameter than the two support rollers.
16. The method for cutting a glass film according to claim 14 or 15,
the two support rollers and the intermediate roller are set as free rollers.
17. The method for cutting a glass film according to any one of claims 13 to 15,
the two support rollers are symmetrically arranged with respect to the widthwise center of the effective portion, and attract the widthwise center of the effective portion.
18. The method for cutting a glass film according to any one of claims 13 to 15,
the two support rollers support both ends in the width direction of the effective portion, respectively.
19. The method for cutting a glass film according to claim 1,
the first external force is applied by attracting two locations on the lower surface of the effective portion, respectively, and the second external force is applied by a support roller that supports the lower surface of the effective portion.
20. The method for cutting a glass film according to any one of claims 1 to 4, 8 to 10, 12 to 15, and 19,
the thickness of the belt-shaped glass film is in the range of 200-300 μm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015035310A JP6424674B2 (en) | 2015-02-25 | 2015-02-25 | Cutting method of glass film |
| JP2015-035310 | 2015-02-25 | ||
| PCT/JP2016/052436 WO2016136368A1 (en) | 2015-02-25 | 2016-01-28 | Method for cleaving glass film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107001104A CN107001104A (en) | 2017-08-01 |
| CN107001104B true CN107001104B (en) | 2020-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201680003661.7A Active CN107001104B (en) | 2015-02-25 | 2016-01-28 | Method for cutting glass film |
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| Country | Link |
|---|---|
| JP (1) | JP6424674B2 (en) |
| KR (1) | KR102357543B1 (en) |
| CN (1) | CN107001104B (en) |
| TW (1) | TWI671268B (en) |
| WO (1) | WO2016136368A1 (en) |
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| JP6738043B2 (en) * | 2016-05-31 | 2020-08-12 | 日本電気硝子株式会社 | Glass film manufacturing method |
| JP6796282B2 (en) * | 2016-10-11 | 2020-12-09 | 日本電気硝子株式会社 | Glass film manufacturing method |
| JP6829814B2 (en) * | 2017-03-13 | 2021-02-17 | 日本電気硝子株式会社 | Glass film manufacturing method |
| CN112429948B (en) * | 2020-12-02 | 2022-04-12 | 万津实业(赤壁)有限公司 | Curved glass processing method |
| CN117446500B (en) * | 2023-12-25 | 2024-03-29 | 成都中嘉微视科技有限公司 | Adjustable adjusting system |
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| WO2014077117A1 (en) * | 2012-11-13 | 2014-05-22 | 日本電気硝子株式会社 | Sheet glass manufacturing method and manufacturing device |
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| JP5696393B2 (en) * | 2010-08-02 | 2015-04-08 | 日本電気硝子株式会社 | Cleaving method of glass film |
| JP2012096936A (en) * | 2010-10-29 | 2012-05-24 | Asahi Glass Co Ltd | Apparatus and method for cutting edge of glass ribbon, and apparatus and method for manufacturing glass product |
| JP5617556B2 (en) * | 2010-11-22 | 2014-11-05 | 日本電気硝子株式会社 | Strip glass film cleaving apparatus and strip glass film cleaving method |
| CN103313946B (en) * | 2011-06-08 | 2016-11-23 | 日本电气硝子株式会社 | The cutting-off method of plate glass |
| DE102011084128A1 (en) * | 2011-10-07 | 2013-04-11 | Schott Ag | Method for cutting a thin glass with special formation of the edge |
| WO2014085357A1 (en) * | 2012-11-29 | 2014-06-05 | Corning Incorporated | Methods and apparatus for fabricating glass ribbon of varying widths |
| EP2950969A4 (en) * | 2013-01-30 | 2016-10-19 | Corning Inc | Apparatus and methods for continuous laser cutting of flexible glass |
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2015
- 2015-02-25 JP JP2015035310A patent/JP6424674B2/en active Active
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2016
- 2016-01-28 WO PCT/JP2016/052436 patent/WO2016136368A1/en active Application Filing
- 2016-01-28 CN CN201680003661.7A patent/CN107001104B/en active Active
- 2016-01-28 KR KR1020177012582A patent/KR102357543B1/en active IP Right Grant
- 2016-02-04 TW TW105103822A patent/TWI671268B/en active
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| CN101495418A (en) * | 2005-05-17 | 2009-07-29 | 康宁股份有限公司 | Method and apparatus for separating a pane of brittle material from a moving ribbon of the material |
| CN103748047A (en) * | 2011-08-12 | 2014-04-23 | 康宁股份有限公司 | Method and apparatus for removing peripheral portion of glass sheet |
| WO2013082089A1 (en) * | 2011-11-30 | 2013-06-06 | Corning Incorporated | Method and apparatus for removing peripheral portion of a glass sheet |
| WO2014077117A1 (en) * | 2012-11-13 | 2014-05-22 | 日本電気硝子株式会社 | Sheet glass manufacturing method and manufacturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016155716A (en) | 2016-09-01 |
| TWI671268B (en) | 2019-09-11 |
| KR20170118683A (en) | 2017-10-25 |
| CN107001104A (en) | 2017-08-01 |
| JP6424674B2 (en) | 2018-11-21 |
| TW201634414A (en) | 2016-10-01 |
| KR102357543B1 (en) | 2022-02-03 |
| WO2016136368A1 (en) | 2016-09-01 |
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