CN115427362A - Method and apparatus for manufacturing glass plate - Google Patents
Method and apparatus for manufacturing glass plate Download PDFInfo
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- CN115427362A CN115427362A CN202180028420.9A CN202180028420A CN115427362A CN 115427362 A CN115427362 A CN 115427362A CN 202180028420 A CN202180028420 A CN 202180028420A CN 115427362 A CN115427362 A CN 115427362A
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- glass ribbon
- glass
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- breaking bar
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- 239000011521 glass Substances 0.000 title claims abstract description 220
- 238000004519 manufacturing process Methods 0.000 title claims description 41
- 238000000034 method Methods 0.000 title claims description 28
- 230000007246 mechanism Effects 0.000 claims description 47
- 238000005452 bending Methods 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000002250 progressing effect Effects 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003280 down draw process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/0215—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the ribbon being in a substantially vertical plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/002—Precutting and tensioning or breaking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
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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
- C03B33/033—Apparatus for opening score lines in glass sheets
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mining & Mineral Resources (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
When a glass ribbon (2) moving downward in a vertical posture is broken along a score line (3) extending in the width direction of the glass ribbon (2) by using a breaking bar (5) and a glass plate (2 y) is cut from the glass ribbon (2), the breaking bar (5) is brought into contact with a portion of the glass ribbon (2) on the upper side of the score line (3) and the glass ribbon (2) is broken along the score line (3).
Description
Technical Field
The present invention relates to a glass sheet manufacturing method and a glass sheet manufacturing apparatus for cutting a glass sheet from a glass ribbon by breaking the glass ribbon moving downward in a vertical posture along a scribe line extending in a width direction thereof.
Background
As is well known, in the field of glass sheet production, a process of cutting a glass sheet from a glass ribbon continuously formed by a down-draw method or the like and moving downward in a vertical posture is performed. Specific examples of the method and apparatus for producing a glass sheet in this manner include the method and apparatus disclosed in patent document 1.
In the method disclosed in this document, after a score line extending in the width direction of a glass ribbon moving downward in a vertical posture is formed on the glass ribbon by a scoring mechanism, a breaking lever (in this document, a fulcrum lever) is brought into contact with a forming region of the score line of the glass ribbon. Next, the glass ribbon is broken along the score line by bending the score line forming region using the breaking lever as a fulcrum, thereby cutting a glass sheet from the glass ribbon.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2018-90446
Disclosure of Invention
Problems to be solved by the invention
According to the method disclosed in patent document 1, the breaking bar is brought into contact with a portion of the glass ribbon having the same height as the scribe line. In such a case, a crack may develop up and down from the scribe line as a starting point at the time of breaking, and may cause breakage, damage, or the like of the glass. Therefore, the quality of the cut glass sheet may be degraded, and the yield of the product may be deteriorated.
From the above-described viewpoint, an object of the present invention is to improve the quality of a cut glass sheet and the product yield by reducing the probability of occurrence of breakage, damage, or the like when a glass ribbon is broken by a breaking bar.
Means for solving the problems
A first aspect of the present invention made to solve the above problems is a method for manufacturing a glass sheet by cutting a glass ribbon moving downward in a vertical posture along a scribe line extending in a width direction of the glass ribbon by using a breaking bar, wherein the breaking bar is brought into contact with a portion of the glass ribbon above the scribe line to break the glass ribbon along the scribe line.
According to this method, when the glass ribbon is broken along the scribe line, the breaking lever contacts a portion above the scribe line, and therefore the contact position of the breaking lever and the formation position of the scribe line are vertically separated. Therefore, the probability of the crack progressing vertically from the scribe line as a starting point is reduced, and breakage, damage, or the like of the glass is less likely to occur. As a result, the quality of the cut glass sheet is improved, and the product yield is improved. Here, if the breaking bar is brought into contact with the glass ribbon at the same height position as the scribe line, the reaction (repeated shaking) of the broken glass sheet becomes large, the glass sheet and the breaking bar come into contact again to break the glass sheet, or the broken surface of the glass sheet and the breaking bar come into contact after breaking, and as a result, breakage or the like occurs, or the position where the breaking bar comes into contact is deviated. However, according to this method, such a problem is effectively avoided.
In this method, the breaking bar may be brought into contact with a portion of the glass ribbon separated from the score line to an upper side by 5mm or more and less than 70mm.
In this way, the probability of the crack progressing vertically from the score line as a starting point can be reliably reduced, and the tensile stress from the breaking bar to the glass ribbon can be appropriately applied to the score line. More specifically, when the lower limit of the above range is less than 5mm, the probability of the crack progressing vertically from the scribe line as a starting point cannot be sufficiently reduced, and as a result, the glass may be broken or damaged. When the upper limit of the above range is 70mm or more, it is difficult for the breaking bar to apply an appropriate force to the scribe line of the glass ribbon, and there is a possibility that a cutting error or the like is caused. However, if the value falls within the above-mentioned range in the method herein, such a problem is unlikely to occur.
In addition to the structure in this method, the breaking bar may be brought into contact with a portion of the glass ribbon separated from the score line to an upper side by 5mm or more and to a lower end of the effective region.
In this way, the effect of setting the lower limit of the above range to 5mm is as described above. In addition, by setting the upper limit value of the above range to the lower end of the effective region, it is possible to avoid a problem such as damage to the effective region (region to be a product glass plate) of the glass ribbon due to contact with the breaking bar, and to contribute to improvement in quality of the product glass plate.
In the above method, the breaking bar may be brought into contact with the glass ribbon by touching the breaking bar in a state where a region of the glass ribbon where the scribe line is formed is bent in the longitudinal direction.
In this way, since the breaking is completed at the time point when the breaking rod is brought into contact with the glass ribbon, variation or variation in the time required for breaking is small, and the production interval time is also shortened.
In this method, the breaking bar may be brought into contact with the glass ribbon by touching at the same timing as the timing at which the operation of bending the region of the glass ribbon in which the scribe line is formed in the longitudinal direction is completed.
In this way, the operation of bending the glass ribbon and the operation of touching the breaking rod to the glass ribbon are performed at appropriate timings, and the breaking operation can be performed smoothly. Here, the above-mentioned "timing identical to the timing at which the bending motion is completed" means not only the timing identical to the timing at which the bending motion is completed but also a timing within 1 second before and after the timing at which the bending motion is completed. It is preferable that the breaking lever be brought into contact with the glass ribbon before the time when the bending operation of the glass ribbon is completed, and therefore, the breaking lever be brought into contact with the glass ribbon before the time when the bending operation is completed and within 1 second of the time.
A second aspect of the present invention made to solve the above problems is an apparatus for manufacturing a glass plate, comprising: a breaking bar for breaking a glass ribbon extending in a width direction of the glass ribbon when cutting a glass sheet from the glass ribbon moving downward in a vertical posture; and a moving mechanism that moves the breaking bar toward the glass ribbon, wherein the moving mechanism is configured to move the breaking bar toward a portion of the glass ribbon above the score line and to contact the portion.
According to this manufacturing apparatus, when the glass ribbon is broken, the moving mechanism brings the breaking bar into contact with a portion of the glass ribbon above the scribing line. Therefore, in the same manner as in the case of the above-described manufacturing method, this manufacturing apparatus also reduces the probability that a crack will progress vertically from the scribe line as a starting point, and thus glass breakage, damage, or the like is less likely to occur.
Effects of the invention
According to the present invention, the occurrence probability of breakage, damage, or the like when the glass ribbon is broken by using the breaking rod is reduced, and the quality of the cut glass plate and the yield of the product are improved.
Drawings
Fig. 1 is a side view showing a schematic configuration of a glass plate manufacturing apparatus according to an embodiment of the present invention.
Fig. 2 is a front view (a front view as viewed along arrow X in fig. 1) showing a schematic configuration of an apparatus for manufacturing a glass sheet according to an embodiment of the present invention.
Fig. 3 is a cross-sectional plan view taken along the line Y-Y of fig. 2.
Fig. 4 is a plan view showing a main part of a breaking bar as a component of the apparatus for manufacturing a glass sheet according to the embodiment of the present invention.
Fig. 5 is a schematic side view showing an implementation state of the method for manufacturing a glass plate according to the embodiment of the present invention.
Fig. 6 is a schematic side view showing an implementation state of the method for manufacturing a glass plate according to the embodiment of the present invention.
Fig. 7 is a schematic side view showing an implementation state of the method for manufacturing a glass plate according to the embodiment of the present invention.
Fig. 8 is a schematic side view showing an implementation state of the method for manufacturing a glass plate according to the embodiment of the present invention.
Detailed Description
Hereinafter, a method and an apparatus for manufacturing a glass plate according to an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a side view illustrating a manufacturing apparatus for a glass plate according to an embodiment of the present invention, and fig. 2 is a front view of the manufacturing apparatus as viewed along arrow X in fig. 1. As shown in these figures, the manufacturing apparatus 1 includes: a scribing mechanism S for forming a scribing line 3 extending in the width direction of the glass ribbon 2 moving downward (in the direction of arrow Z) in a vertical posture; a support mechanism 4 that supports a portion to be cut 2x of the glass ribbon 2 existing below the scribe line 3; and a breaking bar 5 that abuts against the glass ribbon 2. The manufacturing apparatus 1 further includes a moving mechanism 6 that moves the breaking rod 5 in the horizontal direction toward the glass ribbon 2 and moves the breaking rod backward to the retreat position. Here, the moving mechanism 6 is configured to move and abut the breaking bar 5 to the upper side of the scribe line 3 in a state where the peripheral portion of the formation region 2s of the scribe line 3 (hereinafter, referred to as the scribe line formation region 2 s) is bent in the longitudinal direction as shown by the solid line in fig. 1 when breaking the glass ribbon 2. The moving mechanism 6 is constituted by an air cylinder in the present embodiment, but may be a feeding device such as a cylinder or a ball screw mechanism other than the above.
The scribing mechanism S includes: a cutter wheel 7 that forms a scribing line 3 while running in the width direction (in fig. 1, the direction perpendicular to the paper surface) on the surface 2a of the glass ribbon 2 moving in the arrow Z direction; and a support rod 8 that is long in the width direction and supports a portion of the glass ribbon 2 on which the cutter wheel 7 travels from the back surface 2b side. The cutter wheel 7 has a blade (edge) on its circumference that rotates during travel, and is formed into a disk shape. The support rods 8 have contact surfaces that contact portions where the cutter wheel 7 travels, and extend from both ends in the width direction of the glass ribbon 2.
The breaking bar 5 is in contact with a portion of the back surface 2b of the glass ribbon 2 above the scribe line 3 by contact, and has a contact side end portion 5a having a convex shape (for example, a semicircular shape or a curved shape) in a vertical cross-sectional side surface in contact with the back surface 2b of the glass ribbon 2. Here, the portion of the glass ribbon 2 that is not bent and is located above the scribe line 3 is separated from the scribe line 3 by a predetermined distance L1. The predetermined distance L1 is 5mm or more and less than 70mm. In addition, when the effective region (region of the product glass plate) is considered to exist in the glass ribbon 2, the predetermined distance L1 may be 5mm or more and less than the distance from the scribe line 3 to the lower end of the effective region. The predetermined distance L1 in this case is set to 5mm or more and less than 20mm in consideration of the effective region of the glass ribbon 2 in this embodiment. Both ends in the width direction of the breaking bar 5 are positioned inward in the width direction from both ends in the width direction of the glass ribbon 2.
Fig. 3 is a cross-sectional plan view taken along the line Y-Y of fig. 2. As shown in the figure, the glass ribbon 2 has a curved shape that is convex toward one side (the front surface 2a side) along the width direction (W-W direction), and both ends in the width direction are held by a pair of claws 11ax of a chuck 11a described later. The contact side end portion 5a of the breaking bar 5 has a curved shape that is convex toward the same side as the glass ribbon 2 in the width direction. In this embodiment, the shape of the breaking bar 5 itself in the width direction is also a curved shape that is convex to the same side as the glass ribbon 2. The break lever 5 is divided into two break lever members 5x and 5y, and the two members 5x and 5y are connected to each other at the widthwise central position of the break lever 5. The two members 5x and 5y have a symmetrical shape. Therefore, the two members 5x and 5y have the contact side ends 5xa and 5ya, respectively, and the two contact side ends 5xa and 5ya are connected to form the contact side end 5a of the above-described breaking bar 5.
Fig. 4 is an enlarged plan view of a main portion showing the coupling portions of the two break bar members 5x and 5y. As shown in the figure, in the connecting portion between the two breaking bar members 5x and 5y, the end portions 5xb and 5yb on the glass ribbon 2 side are in contact with each other, and the breaking bar 5 is symmetrical in the width direction about the end portions 5xb and 5 yb. Further, the gap SP between the facing end surfaces 5xc, 5yc of the two break lever members 5x, 5y gradually increases toward the side opposite to the glass ribbon 2 side. The two break bar members 5x and 5y are connected so that the angle formed by the two break bar members 5x and 5y can be adjusted. The angle adjustment mechanism MC for adjusting the angle includes: a plate PL which is attached to the two members 5x and 5y across the two members 5x and 5y and has a long hole HL; and bolts Bx, by inserted into the long holes HL of the plate PL and screwed into the two members 5x, 5y. According to this angle adjustment mechanism MC, the bolts Bx and By are loosened, the angles of the two members 5x and 5y are changed with the contact portions of the both end portions 5xb and 5yb as supporting points, and then the bolts Bx and By are fastened, whereby the angles of the two members 5x and 5y can be adjusted. The angle of the two members 5x and 5y is adjusted every time the curvature of the curved shape of the glass ribbon 2 changes.
The components of the manufacturing apparatus 1 will be described with reference to fig. 1 and 2 again. A suction nozzle 9 for sucking glass powder generated by breaking is disposed at a position on the back side of the scribe line 3 of the glass ribbon 2. The suction nozzle 9 has an opening 9a facing the surface 2a of the glass ribbon 2, and performs suction of the glass frit through the opening 9a by operation of a negative pressure generating device (not shown) such as a negative pressure pump.
The support mechanism 4 includes an arm 10 extending in the longitudinal direction of the glass ribbon 2 and a chuck group 11 including a plurality of (five in the present embodiment) chucks 1a attached to the arm 10 at intervals. The arm 10 and the gripper group 11 are disposed on one side and the other side in the width direction of the glass ribbon 2, respectively. Each of the plurality of chucks 11a includes a pair of claws 11ax for gripping the portion to be cut 2x of the glass ribbon 2 in the thickness direction.
The support mechanism 4 is configured to change the posture from the basic posture shown by the chain line in fig. 1 to the inclined posture shown by the solid line in the drawing while supporting the portion to be cut 2x. The posture of the support mechanism 4 is changed by the rotational operation of the support mechanism 4 around the vicinity of the position of the breaking lever 5 (the position shown by the solid line in fig. 1). The posture of the support mechanism 4 is changed while moving downward at the same speed as the glass ribbon 2. The support mechanism 4 bends the peripheral edge portion of the scribe line forming region 2s of the glass ribbon 2 so as to be convex in the longitudinal direction toward the front surface 2a by the above-described rotation operation. The rotation operation of the support mechanism 4 is performed simultaneously with the movement of the moving mechanism 6 moving the breaking bar 5 toward the glass ribbon 2. Then, the moving mechanism 6 causes the breaking lever 5 to touch the glass ribbon 2 at the same timing as the timing at which the rotation operation of the supporting mechanism 4 is completed. Specifically, the moving mechanism 6 is configured to bring the breaking lever 5 into contact with the glass ribbon 2 within 1 second before and after the completion of the rotation operation of the support mechanism 4 and the completion of the operation of bending the glass ribbon 2. In this embodiment, the moving mechanism 6 is configured to bring the breaking lever 5 into contact with the glass ribbon 2 immediately before the time when the rotation operation of the support mechanism 4 is completed, in other words, before the time and within 1 second of the time. While the support mechanism 4 supports the portion to be cut 2x, the glass ribbon 2 is bent so as to become convex on the side of the front surface 2a in the width direction, as shown in fig. 3.
In this embodiment, the arm 10 and the collet group 11 disposed on one side in the width direction of the glass ribbon 2 and the arm 10 and the collet group 11 disposed on the other side in the width direction of the glass ribbon 2 are configured to rotate integrally. However, the arms 10 and the gripper groups 11 on both sides may be independently rotated.
Among the components of the manufacturing apparatus 1, the breaking bar 5 and the support bar 8 are mounted on a first housing (not shown) disposed on the back surface 2b side of the glass ribbon 2, and the cutter wheel 7 and the suction nozzle 9 are mounted on a second housing (not shown) disposed on the front surface 2a side of the glass ribbon 2. The first housing and the second housing are movable in the vertical direction. Thus, the breaking lever 5 and the support lever 8 are configured to move up and down integrally with the first housing while maintaining their relative positional relationship in the up-down direction. The cutter wheel 7 and the suction nozzle 9 are configured to move up and down integrally with the second housing while maintaining the relative positional relationship in the vertical direction.
The first casing and the second casing can move downward following the glass ribbon 2 at the same speed as the downward movement speed of the glass ribbon 2. Thus, the breaking bar 5, the support bar 8, the cutter wheel 7, and the suction nozzle 9 are configured to function as they are, while moving downward at the same speed as the moving speed of the glass ribbon 2, as the first housing and the second housing follow the downward movement of the glass ribbon 2. Similarly, the support mechanism 4 is configured to function as it is while moving downward at the same speed as the moving speed of the glass ribbon 2. Therefore, when the above-described components of the manufacturing apparatus 1 perform their own functions, the relative speed in the vertical direction with respect to the glass ribbon 2 is zero.
Among the above-described components, the breaking lever 5, the support lever 8, the cutter wheel 7, and the suction nozzle 9 are configured to move in the thickness direction of the glass ribbon 2 between an operating position for performing their functions and a retracted position for being retracted away from the glass ribbon 2 as indicated by arrows in fig. 1. The movement of each component in the thickness direction is performed while moving downward at the same speed as the glass ribbon 2. The breaking lever 5, the cutter wheel 7, the support lever 8, and the suction nozzle 9 are in the operating position shown by the solid line in fig. 1, and in the retracted position shown by the dashed-dotted line in the figure.
A regulating roller 12 serving as a fulcrum when the glass ribbon 2 is bent by the rotational operation of the support mechanism 4 is disposed above the scoring mechanism S on the front surface 2a side of the glass ribbon 2. When the glass ribbon 2 is broken, tension is applied to the glass ribbon 2 (the peripheral portion of the scribe line forming region 2 s) between the support mechanism 4 and the regulating roller 12. Therefore, when the breaking lever 5 touches the glass ribbon 2, tension is applied to the touched portion of the glass ribbon 2.
Next, a method for producing a glass plate using the above-described production apparatus 1 will be described with reference to fig. 5 to 8.
In the method of manufacturing a glass sheet according to the present embodiment, the glass ribbon 2 to be broken is formed by, for example, a down-draw method (overflow down-draw method or the like). The glass ribbon 2 is formed to have a thickness of, for example, 1000 μm or less (preferably 700 μm or less and 100 μm or more) and has flexibility capable of bending by an external force.
The method for manufacturing a glass plate according to the present embodiment roughly includes a scribing step of forming a scribing line 3 on a glass ribbon 2, and a breaking step of breaking the glass ribbon 2 along the scribing line 3 formed in the scribing step to cut a glass plate.
In the scribing step, as shown in fig. 5, first, the cutter wheel 7 and the support rod 8 are moved from the retracted position to the operating position while the plurality of chucks 11a of the support mechanism 4 support the portion to be cut 2x. Next, the cutter wheel 7 moved to the operating position is caused to travel in the width direction on the surface 2a of the glass ribbon 2 to form the scribing line 3.
After the scribing process is completed as described above, the cutter wheel 7 and the support rod 8 are moved from the operating position to the retracted position. In this case, the plurality of chucks 11a of the support mechanism 4 continue to support the portion to be cut 2x after the completion of the scribing process. Here, at the time point when the scribing process is completed, the cutter wheel 7 and the support bar 8 are in a state of being located at the same height position as the scribing line 3. In preparation for executing the breaking step from this state, both the first casing and the second casing are moved upward relative to the glass ribbon 2. Thereby, as shown in fig. 6, the breaking lever 5 is held at a height position separated from the scribing line 3 by a predetermined distance L1 upward, and the suction nozzle 9 is held at the same height position as the scribing line 3.
In the breaking step, as shown in fig. 7, the support mechanism 4 is rotated in the direction indicated by the arrow C while the breaking lever 5 and the suction nozzle 9 are held at the retracted position. Thereby, the posture of the support mechanism 4 is changed from the basic posture to the inclined posture, and the peripheral portion of the scribe line forming region 2s of the glass ribbon 2 starts to be bent so that the front surface 2a side becomes convex. At this time, since the portion of the glass ribbon 2 above the scribe line forming region 2s is supported by the regulating roll 12, tension is applied to the peripheral portion of the scribe line forming region 2 s. The moving mechanism 6 moves the breaking lever 5 in the horizontal direction toward the glass ribbon 2 in the middle of the rotation of the support mechanism 4. In the same manner, the suction nozzle 9 is also moved toward the glass ribbon 2. At a point in time when the angle α of the support mechanism 4 with respect to the vertical line reaches a predetermined inclination angle, that is, immediately before the rotation operation of the support mechanism 4 is completed, the moving mechanism 6 causes the contact-side end portion 5a of the breaking lever 5 to contact the back surface 2b of the glass ribbon 2. In this case, the portion where the contact side end portion 5a of the breaking bar 5 contacts the back surface 2b of the glass ribbon 2 is a portion separated upward by a predetermined distance L1 (strictly, the predetermined distance L1 shown in fig. 6) from the scribe line 3. The form when the contact-side end portion 5a of the breaking bar 5 contacts the glass ribbon 2 is the form shown by the solid line in fig. 1 in a side view, and the form shown in fig. 3 in a plan view. In this case, the contact-side end portion 5a of the breaking bar 5 contacts the back surface 2b of the glass ribbon 2 before other portions (the peripheries of both end portions in the width direction, etc.) at the center portion in the width direction.
By this operation, the glass ribbon 2 is broken along the scribe line 3, and the portion to be cut 2x is cut as a glass plate 2 y. Immediately after the breaking, as shown in fig. 8, the broken end face 2z at the lower end of the glass ribbon 2 does not contact the broken end face 2yz at the upper end of the glass plate 2y, and the breaking bar 5 does not contact the glass ribbon 2 (2 z) and the glass plate 2y (2 yz). The glass powder generated by the breakage is sucked by the suction nozzle 9.
According to the present embodiment that is broken as described above, the following operational effects are obtained.
In the present embodiment, when the glass ribbon 2 is broken along the scribe line 3, the breaking bar 5 abuts against a portion above the scribe line 3, and therefore the abutting position of the breaking bar 5 is vertically separated from the formation position of the scribe line 3. Therefore, the phenomenon that the crack progresses up and down with the scribe line 3 as a starting point disappears, and breakage, damage, or the like of the glass is less likely to occur. As a result, the quality of the cut glass plate 2y is improved, and the product yield is improved. Here, if the breaking bar 5 is brought into contact with the same height position as the scribe line 3, the reaction (repeated shaking) of the broken glass plate 2y becomes large, and the glass plate 2y is damaged by coming into contact with the breaking bar 5 again, or the broken surface 2z is broken by coming into contact with the breaking bar 5. However, in the present embodiment, such a disadvantage is effectively avoided.
In the present embodiment, the breaking lever 5 is brought into contact with a portion of the glass ribbon 2 that is separated upward from the scribe line 3 by a predetermined distance L1. Here, when the predetermined distance L1 is set to be 5mm or more and less than 70mm, the probability of the crack progressing vertically from the score line 3 as a starting point can be reliably reduced, and the contact force of the breaking bar 5 against the glass ribbon 2 can be appropriately applied to the score line 3. More specifically, if the lower limit of the predetermined distance L1 is less than 5mm, it is difficult to sufficiently reduce the probability that a crack will progress up and down from the scribe line 3 as a starting point, and there is a possibility that the glass will be broken or damaged. When the upper limit value of the predetermined distance L1 is 70mm or more, it is difficult to appropriately apply the contact force of the breaking bar 5 to the glass ribbon 2 to the scribe line 3, which may cause a cutting error or the like. However, such a problem is not likely to occur in the structure described here.
Further, unlike the above case, when the predetermined distance L1 is set to be 5mm or more and a distance from the scribing line 2 to the lower end of the effective region of the glass ribbon 2, it is possible to avoid a problem that the effective region of the glass ribbon 2 (a region to be a product glass plate) is damaged by the contact of the breaking bar 5, and the quality of the product glass plate can be improved.
In the present embodiment, the breaking bar 5 is brought into contact with the glass ribbon 2 in a state where the peripheral portion of the formation region 2s of the scribe line 3 of the glass ribbon 2 is bent in the longitudinal direction, and therefore the breaking is completed at the time point of the contact. This reduces variations and fluctuations in the time required for breaking, and also reduces the production interval time.
In the present embodiment, since the breaking lever 5 is brought into contact with the glass ribbon 2 at the same timing (timing immediately before) as the timing at which the operation of bending the glass ribbon 2 in the longitudinal direction is completed, the operation of bending the glass ribbon 2 and the operation of bringing the breaking lever 5 into contact with the glass ribbon 2 are performed at appropriate timings, and the breaking operation can be performed smoothly.
The method for manufacturing a glass plate according to the embodiment of the present invention has been described above, but the present invention is not limited thereto, and various modifications can be made without departing from the scope of the invention.
In the above embodiment, the breaking bar 5 is brought into contact with the glass ribbon 2 in a state where the glass ribbon 2 is bent in the longitudinal direction, but the glass ribbon 2 may be bent in the longitudinal direction and broken after the breaking bar 5 is brought into contact with the glass ribbon 2. In such a case, the operation of bringing the breaking lever 5 into contact with the glass ribbon 2 is not performed.
In the above embodiment, the supporting mechanism 4 is configured to support the portion to be cut 2x of the glass ribbon 2 by the pair of claws 11ax of the chuck 11a, but instead, a configuration may be adopted in which the portion to be cut 2x is supported by a suction pad on the front surface or the back surface of the portion to be cut 2x.
In the above embodiment, the glass ribbon 2 is broken by bending the peripheral portion of the scribe line forming region 2s, but the glass ribbon can be broken similarly even when only the scribe line forming region 2s is bent, in other words, the glass ribbon can be broken similarly by bending at least the scribe line forming region 2 s.
Description of the reference numerals
1. Glass plate manufacturing device
2. Glass ribbon
2a surface of glass ribbon
2b Back of glass ribbon
2s formation region of scribing line (scribing line formation region)
2x cutting-to-be-cut portion
2y glass plate
3. Scribing line
4. Support mechanism
5. Breaking rod
6. Moving mechanism
L1 distance from the scribe line to the upper side
S a scribing mechanism.
Claims (6)
1. A method for manufacturing a glass plate, wherein a glass ribbon moving downward in a vertical posture is broken along a scribing line extending in a width direction of the glass ribbon by using a breaking bar to cut a glass plate from the glass ribbon,
the method for manufacturing a glass sheet is characterized in that,
the breaking bar is brought into contact with a portion of the glass ribbon located above the score line, and the glass ribbon is broken along the score line.
2. The method for producing glass sheet according to claim 1,
the breaking bar is brought into contact with a portion of the glass ribbon separated from the score line to the upper side by 5mm or more and less than 70mm.
3. The method for producing glass sheet according to claim 1,
the breaking bar is brought into contact with a portion of the glass ribbon separated from the score line to an upper side by 5mm or more and to a lower end of the effective region.
4. The method for producing a glass sheet according to any one of claims 1 to 3,
the breaking bar is brought into contact with the glass ribbon by touching in a state where a forming region of the scribe line of the glass ribbon is bent in a longitudinal direction.
5. The method for manufacturing glass plate according to claim 4,
the breaking lever is brought into contact with the glass ribbon by touching at the same timing as the timing at which the action of bending the formation region of the scribing line of the glass ribbon in the longitudinal direction is completed.
6. A glass plate manufacturing apparatus includes: a breaking bar for breaking a glass ribbon extending in a width direction of the glass ribbon when cutting a glass sheet from the glass ribbon moving downward in a vertical posture; and a moving mechanism that moves the breaking bar toward the glass ribbon,
the apparatus for manufacturing a glass sheet is characterized in that,
the moving mechanism is configured to move the breaking bar to a portion of the glass ribbon above the scribing line and to contact the portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020107738A JP2022003001A (en) | 2020-06-23 | 2020-06-23 | Manufacturing method of glass sheet, and manufacturing apparatus therefor |
| JP2020-107738 | 2020-06-23 | ||
| PCT/JP2021/017308 WO2021261087A1 (en) | 2020-06-23 | 2021-04-30 | Method for manufacturing glass plate and apparatus for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115427362A true CN115427362A (en) | 2022-12-02 |
Family
ID=79246871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180028420.9A Pending CN115427362A (en) | 2020-06-23 | 2021-04-30 | Method and apparatus for manufacturing glass plate |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2022003001A (en) |
| KR (1) | KR20230028209A (en) |
| CN (1) | CN115427362A (en) |
| WO (1) | WO2021261087A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006124194A (en) * | 2004-10-26 | 2006-05-18 | Nippon Electric Glass Co Ltd | Method for cutting and separating glass plate and apparatus therefor |
| JP2007099563A (en) * | 2005-10-04 | 2007-04-19 | Central Glass Co Ltd | Apparatus and method of cutting sheet glass |
| CN102596523A (en) * | 2010-02-05 | 2012-07-18 | 三星钻石工业股份有限公司 | Method for breaking brittle material substrate |
| WO2013035528A1 (en) * | 2011-09-09 | 2013-03-14 | 日本電気硝子株式会社 | Method and apparatus for cutting band-shaped plate glass |
| JP2017226549A (en) * | 2016-06-20 | 2017-12-28 | 日本電気硝子株式会社 | Manufacturing method of sheet glass and manufacturing apparatus of the same |
| CN108137373A (en) * | 2015-12-21 | 2018-06-08 | 日本电气硝子株式会社 | The manufacturing device of glass plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6757496B2 (en) | 2016-12-02 | 2020-09-23 | 日本電気硝子株式会社 | Manufacturing method of glass plate |
| KR20220093088A (en) * | 2019-10-29 | 2022-07-05 | 니폰 덴키 가라스 가부시키가이샤 | Glass plate manufacturing method and its manufacturing apparatus |
-
2020
- 2020-06-23 JP JP2020107738A patent/JP2022003001A/en active Pending
-
2021
- 2021-04-30 WO PCT/JP2021/017308 patent/WO2021261087A1/en active Application Filing
- 2021-04-30 CN CN202180028420.9A patent/CN115427362A/en active Pending
- 2021-04-30 KR KR1020227032366A patent/KR20230028209A/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006124194A (en) * | 2004-10-26 | 2006-05-18 | Nippon Electric Glass Co Ltd | Method for cutting and separating glass plate and apparatus therefor |
| JP2007099563A (en) * | 2005-10-04 | 2007-04-19 | Central Glass Co Ltd | Apparatus and method of cutting sheet glass |
| CN102596523A (en) * | 2010-02-05 | 2012-07-18 | 三星钻石工业股份有限公司 | Method for breaking brittle material substrate |
| WO2013035528A1 (en) * | 2011-09-09 | 2013-03-14 | 日本電気硝子株式会社 | Method and apparatus for cutting band-shaped plate glass |
| CN108137373A (en) * | 2015-12-21 | 2018-06-08 | 日本电气硝子株式会社 | The manufacturing device of glass plate |
| JP2017226549A (en) * | 2016-06-20 | 2017-12-28 | 日本電気硝子株式会社 | Manufacturing method of sheet glass and manufacturing apparatus of the same |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021261087A1 (en) | 2021-12-30 |
| KR20230028209A (en) | 2023-02-28 |
| JP2022003001A (en) | 2022-01-11 |
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