WO2023074243A1 - Procédé de fabrication d'une plaque en verre et dispositif de coupe d'un ruban en verre - Google Patents

Procédé de fabrication d'une plaque en verre et dispositif de coupe d'un ruban en verre Download PDF

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Publication number
WO2023074243A1
WO2023074243A1 PCT/JP2022/036300 JP2022036300W WO2023074243A1 WO 2023074243 A1 WO2023074243 A1 WO 2023074243A1 JP 2022036300 W JP2022036300 W JP 2022036300W WO 2023074243 A1 WO2023074243 A1 WO 2023074243A1
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WO
WIPO (PCT)
Prior art keywords
cutting
glass ribbon
width direction
glass
cutting blade
Prior art date
Application number
PCT/JP2022/036300
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English (en)
Japanese (ja)
Inventor
隼人 奥
秀一郎 奥本
祐弥 山鹿
洋平 桐畑
Original Assignee
日本電気硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN202280057862.0A priority Critical patent/CN117858850A/zh
Publication of WO2023074243A1 publication Critical patent/WO2023074243A1/fr

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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
    • 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
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor

Definitions

  • the present invention is a method for manufacturing a glass plate by performing a first cutting step of cutting a glass ribbon that is conveyed while being shaped to cut out a glass plate, and a second cutting step of cutting the glass ribbon when the first cutting step is not performed.
  • the present invention relates to a manufacturing method and a glass ribbon cutting apparatus that can be used in the second cutting step.
  • a first cutting step may be performed in which a glass ribbon that is continuously moved downward while being shaped in a shaping zone is cut in the width direction at intervals of a predetermined length to sequentially cut out glass sheets.
  • a glass ribbon that is continuously moved downward while being shaped in a shaping zone is cut in the width direction at intervals of a predetermined length to sequentially cut out glass sheets. It is publicly known. In this case, since the melting furnace, etc. of the glass plate manufacturing facility is normally operated continuously, the glass ribbon can be formed even if the cutting device for executing the first cutting step cannot be used due to maintenance or the like. It is common to continue Therefore, even if the first cutting step is not performed, it is necessary to cut and collect the glass ribbon that continues to be shaped.
  • Patent Document 1 describes a second cutting process in which a glass ribbon is cut using a cutting device having a configuration different from that of the cutting device in the process when the first cutting process is not performed. It is disclosed to perform The cutting device used in the second cutting step includes a cutting blade (marking member) that presses the glass ribbon to engrave the marking line, a holding member that holds the glass ribbon and receives the pressing force of the cutting blade, It has The publication also discloses that the glass ribbon is cut by applying stress to the glass ribbon while it is held by a holding member and pressing a cutting blade against the stress-applied portion.
  • the cutting device used in the second cutting step includes a cutting blade (marking member) that presses the glass ribbon to engrave the marking line, a holding member that holds the glass ribbon and receives the pressing force of the cutting blade, It has The publication also discloses that the glass ribbon is cut by applying stress to the glass ribbon while it is held by a holding member and pressing a cutting blade against the stress-applied portion.
  • the shape of the portion where the glass ribbon is present (the portion to be cut) is not uniformly defined. In order to deal with this, it is necessary to vary the length in the width direction to be cut by the cutting blade and the number of cut points depending on the form of each glass ribbon. In this case, it is difficult to properly cut the glass ribbon only by uniformly pressing the cutting blade against the glass ribbon, which may cause further breakage of the glass ribbon.
  • an object of the present invention is to appropriately cut the glass ribbon even if the shape of the glass ribbon is not uniformly determined when cutting.
  • a first aspect of the present invention which has been devised to solve the above problems, includes a first cutting step of cutting a glass ribbon conveyed while being shaped by a first cutting device along the width direction to cut out a glass sheet.
  • a second cutting device comprising a cutting blade that moves in the width direction by pressing the glass ribbon when the first cutting device is not in operation, and a holding member that holds the glass ribbon and receives the pressing force of the cutting blade a second cutting step of cutting the glass ribbon, wherein in the second cutting step, either the pressing force of the cutting blade or the moving speed of the cutting blade in the width direction It is characterized by using one or both as a cutting element and changing the value of the cutting element.
  • the value of the pressing force of the cutting blade is changed, or the value of the moving speed of the cutting blade in the width direction is changed, or The values of both the pressing force of the blade and the moving speed of the cutting blade in the width direction are changed.
  • the value of the cutting element may be changed based on the detection result of a sensor that detects the presence or absence of the glass ribbon.
  • the shape of the glass ribbon can be grasped from the detection results of the sensor, so it is possible to automate the second cutting device and reduce the burden on the operator.
  • the sensors are installed corresponding to at least both widthwise end portions and widthwise intermediate portions of the glass ribbon, respectively, and the second cutting device, when pressing the cutting blade against the glass ribbon, A pressing member that applies bending stress in advance to the pressing region of the glass ribbon is provided, and in the second cutting step, the pressing member preliminarily applies bending stress to the pressing region of the glass ribbon based on the detection result of the sensor.
  • the value of the cutting element may be changed based on whether the bending stress is applied or not.
  • the shape of the glass ribbon is detected by the sensors installed at least at three locations, it is determined whether or not to apply the bending stress after the shape of the glass ribbon is known in more detail. . Since the value of the cutting element is changed based on whether or not the bending stress is applied, the cutting element's value changes regardless of whether the bending stress is applied or not. values can be made reasonable.
  • the pressing member when the sensor detects that the glass ribbon has both ends in the width direction and an intermediate portion in the width direction, the pressing member applies the bending stress, and the sensor detects the bending stress in the width direction of the glass ribbon.
  • the pressing member may not apply the bending stress when it is detected that at least one of both ends is present and that the glass ribbon does not have a widthwise intermediate portion.
  • the pressing member presses the cutting blade while applying bending stress to the pressing region of the glass ribbon.
  • the glass ribbon is smoothly cut by the cracks growing starting from the point where the cutting blade is pressed (marking line).
  • the cutting blade is pressed without applying bending stress, so the breakage It is possible to easily cut the glass ribbon having a shorter length in the width direction.
  • the pressing member applies the bending stress to cut the glass ribbon in a first cutting process, and the pressing member does not apply the bending stress to the glass ribbon.
  • a second cutting process for cutting the ribbon is performed, and the value of the cutting factor when performing the second cutting process is set larger than the value of the cutting factor when performing the first cutting process.
  • the value of the cutting factor becomes larger when the bending stress is not applied to the glass ribbon than when the bending stress is not applied. can be properly cut. More specifically, when bending stress is applied to the glass ribbon, the crack propagates simply by engraving a scribe line with a cutting blade. Velocity values can be small. On the other hand, when bending stress is not applied to the glass ribbon, the glass ribbon must be cut only by the pressing action of the cutting blade. There is a need to. According to the configuration here, it is possible to accurately meet such a request, so that the glass ribbon can be cut more appropriately.
  • the cutting blades are installed corresponding to one width direction end and the other width direction end of the glass ribbon, respectively, and the second cutting device presses the cutting blade against the glass ribbon.
  • a pressing member that applies a bending stress in advance to the pressing region of the glass ribbon is provided, and when the cutting blade is pressed against the glass ribbon in a state where the pressing member applies the bending stress to the glass ribbon, one of the A time difference may be provided between when the cutting blade presses the one end in the width direction of the glass ribbon and when the other cutting blade presses the other end in the width direction of the glass ribbon.
  • the other cutting blade performs the pressing operation.
  • the glass ribbon is cut, so even if the pressing operation is performed, the other cutting blade does not contact the glass ribbon, and the glass ribbon is not cracked as described above. etc. can be avoided.
  • one cutting blade is pressed earlier than the other cutting blade against a glass ribbon that has a vertically long and narrow missing part near the center in the width direction, one cutting blade When the crack developed from one end in the width direction of the glass ribbon by the pressing operation reaches the missing portion, the cutting of the portion of the glass ribbon on the one end side is completed.
  • the time difference is preferably 0.1 to 1.0 seconds.
  • the holding member advances to a holding position where the glass ribbon can be held, and each time cutting using the cutting blade is completed, interference with the glass ribbon is made.
  • the holding member may be retracted to a retracted position where it is not used.
  • the holding member cannot hold the glass ribbon. More specifically, since the glass ribbon shakes or twists immediately after being cut, the glass ribbon may turn from the holding side of the holding member (the side in contact with the glass ribbon) to the opposite side. Then, when the glass ribbon is conveyed in such a wrapped state, the holding member can no longer hold the glass ribbon. The occurrence of such defects is particularly noticeable when cracks in the glass ribbon develop not in the width direction (preferably in the horizontal direction) but in the oblique direction.
  • the holding member is advanced to the holding position each time the glass ribbon is cut, and the holding member is retracted to the retracted position each time the cutting is completed. Moreover, the advance and retraction of the holding member are performed by the control device without the intervention of the operator, so automation of the operation of the holding member is promoted.
  • the holding member is moved from the holding position toward the retracted position within one second after the cutting with the cutting blade is finished.
  • the holding member can be moved from the holding position before the distance between the lower end of the wrapped glass ribbon and the holding member increases. It can be moved to the retracted position. Therefore, the amount of deformation of the glass ribbon that accompanies the movement of the holding member to the retracted position can be suppressed, and breakage of the glass ribbon can be prevented.
  • a second aspect of the present invention which has been devised to solve the above problems, includes a cutting blade that moves in the width direction by pressing a glass ribbon that is being molded and conveyed, and a cutting blade that holds the glass ribbon. and a holding member that receives a pressing force, wherein either one or both of the pressing force of the cutting blade and the speed of movement of the cutting blade in the width direction are used as a cutting factor to perform the cutting. It is characterized by having a control device for changing the value of the element.
  • This glass ribbon cutting device changes the values of the cutting elements in the same manner as in the glass plate manufacturing method described above. Therefore, according to this glass ribbon cutting apparatus, it is possible to obtain substantially the same effect as the corresponding manufacturing method described above.
  • the modification of the cutting elements described above is performed by the controller without operator intervention, thus facilitating automation of the operation of the cutting blade during cutting.
  • the glass ribbon can be properly cut even if the shape of the glass ribbon during cutting is not uniformly determined.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the whole structure of the manufacturing apparatus for enforcing the manufacturing method of the glass plate which concerns on embodiment of this invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic front view which shows the principal part of the manufacturing apparatus for enforcing the manufacturing method of the glass plate which concerns on embodiment of this invention.
  • FIG. 1 is a side view showing the overall configuration of a manufacturing apparatus for carrying out the method for manufacturing a glass plate according to this embodiment.
  • this manufacturing apparatus includes a glass ribbon G processing device 1, a first cutting device 2, and a second cutting device 3 as main components.
  • the side of the first main surface Ga of the glass ribbon G (side of the arrow X1 in FIG. 1) is defined as the "rear side”
  • the side of the second main surface Gb (the side of the arrow Y1 in FIG. 1) is defined as the "front side.”
  • the downstream side in the conveying direction of the glass ribbon G is "downward (preferably vertically downward)" and the upstream side is “upward (preferably vertically upward)”.
  • the processing apparatus 1 includes a forming zone 11 for continuously forming the glass ribbon G, a heat treatment zone 12 for heat-treating (slow cooling) the glass ribbon G, a cooling zone 13 for cooling the glass ribbon G to near room temperature, a forming zone 11,
  • a conveying device 14 composed of roller pairs R provided in a plurality of upper and lower stages.
  • the molding zone 11 and the heat treatment zone 12 are configured by a furnace in which the conveying path of the glass ribbon G is surrounded by walls, and a heating device such as a heater for adjusting the temperature of the glass ribbon G is installed at an appropriate place in the furnace. are placed.
  • a heating device such as a heater for adjusting the temperature of the glass ribbon G is installed at an appropriate place in the furnace.
  • the cooling zone 13 the circumference of the conveying path of the glass ribbon G is open to the outside atmosphere without being surrounded by walls, and a heating device such as a heater is not arranged.
  • a molded body 15 for molding a glass ribbon G from the molten glass Gm by the overflow downdraw method is arranged in the internal space of the molding zone 11 .
  • the molten glass Gm supplied to the molded body 15 overflows from a groove (not shown) formed in the top portion 15 a of the molded body 15 .
  • the overflowing molten glass Gm flows along both side surfaces 15b of the molded body 15 having a wedge-shaped cross section and joins at the lower end. Thereby, the plate-like glass ribbon G is continuously formed.
  • the continuously molded glass ribbon G is conveyed downward in a vertical posture (preferably a vertical posture).
  • the internal space of the heat treatment zone 12 has a predetermined temperature gradient downward.
  • the vertically-positioned glass ribbon G is heat-treated (slowly cooled) so that its temperature decreases as it moves downward in the inner space of the heat treatment zone 12 .
  • This heat treatment suppresses the occurrence of unintended thermal strain in the glass ribbon G.
  • the temperature gradient in the internal space of the heat treatment zone 12 is adjusted, for example, by a heating device provided on the inner surface of the wall of the heat treatment zone 12 .
  • a plurality of roller pairs R that constitute the conveying device 14 sandwich both widthwise end portions of the vertically oriented glass ribbon G from both the front and back sides.
  • the uppermost roller pair R arranged in the forming zone 11 is a cooling roller.
  • the plurality of roller pairs R may include rollers that do not sandwich the width direction end portions of the glass ribbon G.
  • both ends in the width direction of the glass ribbon G manufactured by the processing apparatus 1 are thicker than the central portion in the width direction due to the effects of shrinkage during the molding process (hereinafter also referred to as "edges"). ).
  • the first cutting device 2 is used in the first cutting step of the method for manufacturing a glass plate according to this embodiment.
  • the first cutting device 2 is configured to sequentially cut out glass sheets from the glass ribbon G by cutting the vertically oriented glass ribbon G in the width direction at intervals of a predetermined length below the processing device 1 . ing. Edges of the cut glass plate are removed in a later step.
  • the glass plate from which the lugs have been removed becomes the original glass plate (mother glass plate) from which one or more product glass plates are obtained.
  • the width direction is a direction orthogonal to the longitudinal direction (conveyance direction) of the glass ribbon G and parallel to both main surfaces Ga and Gb of the glass ribbon G, and substantially coincides with the horizontal direction in this embodiment. do.
  • the arrow X2 side in FIG. 2 is the left side in the width direction
  • the arrow Y2 side is the right side in the width direction. .
  • the first cutting device 2 includes a scribe line forming device 21 and a folding device 22 .
  • the scribe line forming device 21 is a device that forms a scribe line S on the first main surface Ga of the vertically oriented glass ribbon G dropped from the processing device 1 at the scribe line forming position P1.
  • the scribe line forming device 21 includes a wheel cutter 23 that forms the scribe line S along the width direction of the first principal surface Ga of the glass ribbon G, and a scribe line S at a position corresponding to the wheel cutter 23 . and a support member 24 (for example, a support bar or a support roller) that supports the second main surface Gb of the .
  • the scribe lines S may be formed by laser irradiation or the like.
  • the folding device 22 is a device that cuts out a glass sheet by folding the glass ribbon G along the scribe line S at a folding position P2 provided below the scribe line forming position P1.
  • the folding/splitting device 22 includes a folding/splitting member 25 that abuts on the region where the scribe line S is formed from the second principal surface Gb side, and a lower region of the glass ribbon G below the folding/splitting position P2. and a gripping mechanism 26 for gripping.
  • the folding member 25 is composed of a plate-like body (surface plate) having a contact surface (having an arc shape when viewed from the side) that contacts the entire width direction or a part of the glass ribbon G.
  • the contact surface of the folding member 25 may be a curved surface curved in the width direction in plan view.
  • the gripping mechanism 26 includes chucks 27 arranged at a plurality of locations in the vertical direction at both ends in the width direction of the glass ribbon G, and arms 28 that hold the plurality of chucks 27 at both ends in the width direction.
  • the chuck 27 may be changed to another holding form such as holding the glass ribbon G by vacuum suction.
  • the second cutting device 3 is used in the second cutting step of the method for manufacturing a glass plate according to this embodiment.
  • This second cutting device 3 is arranged below the first cutting device 2, and when the first cutting device 2 is not in operation (for example, during maintenance or when restarting the forming of the glass ribbon G), while forming in the forming zone 11 It cuts the glass ribbon G conveyed downward.
  • the second cutting device 3 has a body frame 31 made of a framework arranged behind the glass ribbon G.
  • a pair of holding devices 32 , a pair of cutting devices 33 , and a stress applying device 34 are installed in this order from above at the front end of the body frame 31 .
  • the pair of holding devices 32 includes columnar holding members 36 that are arranged corresponding to both ends in the width direction of the glass ribbon G.
  • the pair of holding members 36 are each rotated at the front end of the holding arm 36a. 37 (see FIGS. 3 and 4) to rotate integrally.
  • Each of the pair of holding arms is held on a base portion 36b installed at the upper end of the body frame 31 (see FIG. 5).
  • the pair of holding members 36 are held at the same height and have a function of independently rotating.
  • the pair of holding members 36 are retracted to a retracted position (shown by solid lines in FIG. 5) that does not interfere with the glass ribbon G as shown in FIG. 5 to the holding position where the glass ribbon G can be held (the state indicated by the dashed line in FIG.
  • the pair of holding members 36 when the pair of holding members 36 is retracted to the retracted position, the pair of retaining members 36 are spaced outward in the width direction from both ends in the width direction of the glass ribbon G and extend in the front-rear direction, and are advanced to the retaining position. In order to hold the second main surface Gb of the glass ribbon G at times, it extends in the left-right direction (width direction). Also, the pair of holding members 36 are rotatable around respective central axes 36x (see FIGS. 3 and 4).
  • the pair of cutting devices 33 are provided with cutting blades 38 arranged corresponding to both ends in the width direction of the glass ribbon G, and the pair of cutting blades 38 are arranged in the front-rear direction (upward toward the front in the figure). inclined direction). Also, the pair of cutting blades 38 are held at the same height position, and each independently protrudes and retreats. Furthermore, the pair of cutting blades 38 are retracted rearward from the glass ribbon G as shown in FIG. In addition, the pair of cutting blades 38 are brought into a state of pressing both ends of the glass ribbon G in the width direction as shown in FIG. Each of the cutting blades 38 is configured to move in the width direction while pressing both width direction end portions of the glass ribbon G from the first main surface Ga side when the pressing state is reached.
  • the stress applying device 34 has a pressing member 41 for applying bending stress to the glass ribbon G.
  • the pressing member 41 is attached to the tip of a pair of swinging arms 40 swingable around the support shaft 39 (see FIGS. 2 and 5).
  • the pressing member 41 is formed by arranging a plurality of (four in the figure) rollers 41a in series along the width direction, and is longer than the length of the glass ribbon G in the width direction.
  • the plurality of rollers 41a are rotatable around a central axis 41x extending in the width direction (see FIGS. 2 and 3). Further, the pressing member 41 is retracted rearward from the glass ribbon G as shown in FIG. state indicated by a dashed line).
  • the second cutting device 3 includes a control device 42 (see FIGS. 6 and 7).
  • the controller 42 has a sensor 43 that detects the presence or absence of the glass ribbon G, as shown in FIG.
  • the sensor 43 is arranged behind the conveying path of the glass ribbon G by being fixed to the body frame 31 . Further, the sensor 43 is arranged at an intermediate height position between the support shaft 39 at the upper end of the stress applying device 34 and the pressing member 41 at the lower end. In this case, as shown in FIG. 2, a plurality of sensors 43 are installed corresponding to a plurality of positions in the width direction of the glass ribbon G. As shown in FIG.
  • a total of three sensors 43 are installed at locations corresponding to both ends in the width direction of the glass ribbon G and locations corresponding to the central portion in the width direction. These sensors 43 are fixed to the front end portion of the body frame 31 so as to extend along a straight line in the width direction, and are held at a fixed position.
  • a laser sensor, an ultrasonic sensor, a thermosensor, or the like is used as the sensor 43 .
  • the sensor 43 always detects the presence or absence of the glass ribbon G. As shown in FIG.
  • the control device 42 has a function of reflecting the detection results of the three sensors 43 on the rotational movement of each holding member 36.
  • the configuration and operation of the control device 42 in this case are as follows. That is, as shown in FIG. 6, signals from the three sensors 43 are sent to the control section 44 .
  • a microcomputer or a personal computer can be used as the control unit 44, but other known control means may be used.
  • a signal is sent from the control unit 44 to the rotation controller 45 , and the holding member 36 rotates based on the signal from the rotation controller 45 . At this time, the tip of the holding member 36 moves along an arc as indicated by the arrow A.
  • the driving portion 46 of the holding member 36 will be described in detail with reference to FIG.
  • the driving portion 46 includes a winding transmission mechanism 47 that rotates the holding member 36 .
  • the winding transmission mechanism 47 is wound around a drive pulley 49 rotationally driven by a motor 48, a driven pulley 50 fixed to a rotating shaft 37 that rotates integrally with the holding member 36, and the drive pulley 49 and the driven pulley 50.
  • It has a belt 51 that is attached to it.
  • the belt 51 may be a timing belt or another winding member (for example, a chain).
  • the rotational driving force of the motor 48 is transmitted from the driving pulley 49 to the rotating shaft 37 via the belt 51 and the driven pulley 50 .
  • the holding member 36 rotates between the holding position (the position indicated by the solid line) and the retracted position (the position indicated by the dashed line).
  • the angle of rotation of the holding member 36 is 90° in the drawing with respect to the holding member 36 at the holding position, but is preferably 80° or more and 180° or less.
  • Control of forward and reverse rotation of the holding member 36 and control of the rotational speed are performed by a rotation controller 45 that receives a signal from the control section 44 .
  • the rotation controller 45 may be incorporated in the control section 44 .
  • the drive unit 46 may use a gear transmission mechanism similar to that described later, or may use other known mechanisms having similar functions. may
  • control device 42 has a function of reflecting the detection results of the three sensors 43 in the pressing operation of each of the cutting blades 38 .
  • the configuration and operation of the control device 42 in this case are as follows. That is, as shown in FIG. 7, signals from the three sensors 43 are also sent to the control section 44 in this case as well.
  • the controller 44 is shared with the controller 44 described above, but may be a separate controller.
  • the cutting elements of the individual cutting blades 38 are the pressing force of the cutting blades 38 against the glass ribbon G and the moving speed of the cutting blades 38 in the width direction, and the values of these cutting elements can be changed.
  • a signal is sent from the control unit 44 to the regulator 52 , and the pressing force of the cutting blade 38 is adjusted based on the operation of the regulator 52 . Further, a signal is sent from the control unit 44 to the rotation controller 53, and based on the signal from the rotation controller 53, the turning speed of the cutting blade 38 is adjusted. adjusted.
  • the driving portion 54 of the cutting blade 38 will be described in detail with reference to FIG. Although the drive portion 54 of one of the cutting blades 38 is shown in detail in the figure, the drive portion 54 of the other cutting blade 38 has the same configuration.
  • the drive unit 54 includes a fluid pressure cylinder 55 such as an air cylinder that projects and retracts the cutting blade 38 .
  • a cutting edge 38 is fixed to the tip of the retractable rod 55 a of the fluid pressure cylinder 55 .
  • a rear end portion of the fluid pressure cylinder 55 is fixed to a base plate 56 that rotates at a fixed position at the front end portion of the body frame 31 . Therefore, if the regulator 52 is installed in the fluid supply path of the fluid pressure cylinder 55, the controller 44 can project the protruding rod 55a of the fluid pressure cylinder 55 while adjusting the pressure. Then, the value of the pressing force of the cutting blade 38 is changed by the operation of the regulator 52 that receives the signal from the control section 44 . In this case, the control unit 44 stores in advance a first pressing force value and a second pressing force value that is greater than the first pressing force value.
  • the value of the second pressing force is preferably 5 times or more and 20 times or less than the value of the first pressing force, and more preferably has a lower limit of 7 times and/or an upper limit of 15 times.
  • the drive unit 54 also includes a gear transmission mechanism 57 for rotating the cutting blade 38 in the width direction as indicated by an arrow B. As shown in FIG. In this turning movement, the central portion of the movement trajectory is convex forward.
  • the gear transmission mechanism 57 has a small-diameter drive gear 59 that is rotationally driven by a motor 58 and a large-diameter driven gear 60 that meshes with the drive gear 59 .
  • a rotating shaft 61 that rotates integrally with the driven gear 60 is fixed to the substrate 56 .
  • the rotating shaft 61 is rotatably supported by a base 62 via a bearing (not shown). According to this configuration, the rotational driving force of the motor 58 is transmitted from the driving gear 59 to the substrate 56 and the fluid pressure cylinder 55 via the driven gear 60 and the rotating shaft 61 . As a result, the substrate 56 and the fluid pressure cylinder 55 are integrally rotated around the rotary shaft 61, so that the cutting edge 38 is pivotally moved. Furthermore, the turning speed of the cutting blade 38 is changed by the rotation controller 53 that receives a signal from the control section 44 . In this case, the control unit 44 stores in advance the value of the first turning speed and the value of the second turning speed that is greater than the value of the first turning speed.
  • control of forward and reverse rotation of the cutting blade 38 is also performed by the rotation controller 53 that receives a signal from the control section 44 .
  • the rotation controller 53 that receives a signal from the control unit 44 also provides a time difference between when one of the cutting blades 38 pivots and when the other cutting blade 38 pivots.
  • the rotation controller 53 may be incorporated in the control section 44 .
  • the drive unit 54 may use a winding transmission mechanism similar to that described above, or use other known mechanisms having similar functions. You may
  • the pressing member 41 moves between the retracted position and the pressing position, and this movement of the pressing member 41 is also performed based on a signal from the control section 44 of the control device 42 . In this case as well, signals from the three sensors 43 are sent to the controller 44 .
  • the controller 44 is shared with the controller 44 described above, but may be a separate controller. Although the description of the driving portion of the pressing member 41 is omitted, the pressing member 41 may be moved between the retracted position and the pressing position using a fluid pressure cylinder or a ball screw mechanism.
  • the method for manufacturing a glass plate according to this embodiment includes a forming process, a conveying process, a first cutting process, and a second cutting process.
  • the forming process is a process of forming the glass ribbon G in the forming zone 11 .
  • the conveying step is a step of conveying the molded glass ribbon G by the roller pair R of the conveying device 14 .
  • the transporting process includes a heat treatment process and a cooling process.
  • the heat treatment step is a step of performing heat treatment on the glass ribbon G while conveying the glass ribbon G that has undergone the forming step in the heat treatment zone 12 .
  • the cooling step is a step of cooling while conveying the glass ribbon G that has undergone the heat treatment step in the cooling zone 13 .
  • the first cutting step is a step of cutting the glass ribbon G in the width direction by the first cutting device 2 while conveying the glass ribbon G that has undergone the cooling step to obtain a glass plate. More specifically, as shown in FIGS. 1 and 2, in the first cutting step, first, the wheel cutter 23 and the support member 24 follow the glass ribbon G continuously moving downward, A scribe line S is formed on the entire or part of the ribbon G in the width direction. In this embodiment, the scribe line S is also formed on the ear portion, which has a relatively large thickness. After the plurality of chucks 27 grip the glass ribbon G, the arm 28 moves the plurality of chucks 27 so as to follow the glass ribbon G. At this time, the folding member 25 also follows the glass ribbon G and moves.
  • the arm 28 performs an operation (operation in the C direction shown in FIG. 1) for bending the glass ribbon G with the folding member 25 as a fulcrum. Thereby, a bending stress is applied to the scribe line S and its vicinity, and the glass ribbon G is folded along the scribe line S in the width direction. A glass plate is cut out from the glass ribbon G as a result of cutting by this folding.
  • the second cutting step is a step of cutting the glass ribbon G using the second cutting device 3 while the first cutting device 2 is not in operation.
  • each component of the first cutting device 2 is retracted to a position where the cutting process performed by the second cutting device 3 is not hindered.
  • the cutting process performed by the second cutting device 3 will be described below.
  • the case where the presence of the glass ribbon G is detected by the sensor 43 is described as "ON".
  • FIG. 8 to 10 show a first example of cutting processing performed by the second cutting device 3.
  • FIG. 8 the glass ribbon G conveyed to the periphery of the cutting position L1 does not have any missing portions. Therefore, as shown in FIG. 8, when the glass ribbon G passes through the positions where the sensors 43 are arranged, the three sensors 43 are turned ON.
  • the three circle marks arranged at the middle position in the vertical direction of the second cutting device 3 are the detection areas 43a of the three sensors 43 (the same applies to FIGS. 11 to 14 described later).
  • signals indicating ON are sent from the three sensors 43 to the control section 44 , and the control section 44 operates the drive section 46 of the holding member 36 through the rotation controller 45 .
  • the pair of holding members 36 changes from a state in which the pair of holding members 36 extends in the longitudinal direction at the retracted position as indicated by the dashed line in FIG. rotate.
  • the pressing member 41 moves from the retracted state to the pressing state based on a signal from the control unit 44, and applies a bending stress to the pressing region Gx of the glass ribbon G as indicated by the chain line in FIG.
  • the glass ribbon G is held by the pair of holding members 36 .
  • the control unit 44 projects the extending/retracting rod 55a of the fluid pressure cylinder 55 to move the cutting blade 38 closer to the pressing area Gx of the glass ribbon G.
  • the control unit 44 causes one of the cutting blades 38 to press the glass ribbon G.
  • one of the cutting blades 38 pivots in the arrow B1 direction while pressing the glass ribbon G.
  • the value of the pressing force of the cutting blade 38 at this time is set to the first pressing force value (relatively small value).
  • the value of the turning speed of the cutting blade 38 at this time is set to the first value of the turning speed (relatively small value).
  • the other cutting blade 38 is in a standby state, and after that, the controller 44 causes the other cutting blade 38 to press the glass ribbon G.
  • the other cutting blade 38 turns while moving in the direction in which the glass ribbon G is pressed.
  • the interval between when one cutting blade 38 performs the pressing operation and when the other cutting blade 38 performs the pressing operation is 0.1 to 1.0 seconds (preferably 0.1 to 0.7 seconds). seconds).
  • the other cutting blade 38 Since the glass ribbon G has been cut when the other cutting blade 38 performs the pressing operation, the other cutting blade 38 may or may not contact the lower end of the cut glass ribbon G lightly. Therefore, cracks or the like do not occur in the glass ribbon G after being cut.
  • the holding member 36 rotates from the holding position to the retracted position within one second after the cutting is completed. After that, when the glass ribbon G is conveyed by a predetermined length, the holding member 36 rotates again from the retracted position to the holding position, and the same cutting operation as described above is performed. Such a cutting operation is repeated as long as the glass ribbon G is conveyed without missing portions. As shown in FIGS.
  • the cut glass falls downward as unnecessary glass Gy and is collected in the collection area 63 (the same applies to the second to fourth examples below). Therefore, the floor wall 64 on which the second cutting device 3 is mounted has an opening 65 for dropping the cut glass into the collection area 63 (see FIGS. 1 to 4).
  • FIG. 11 and 12 show a second example of the cutting process performed by the second cutting device 3.
  • FIG. 11 the glass ribbon G conveyed to the periphery of the cutting position L1 has a vertically elongated narrow missing portion Gz at a portion slightly shifted to one side (right side in the figure) from the center portion in the width direction. ing. Therefore, as shown in FIG. 11, when the glass ribbon G passes through the positions where the sensors 43 are arranged, the three sensors 43 are turned ON as in the first example described above. Therefore, the cutting operation of the glass ribbon G in this second example is performed in the same manner as in the above-described first example.
  • the pressing member 41 applies bending stress to the pressing region Gx of the glass ribbon G after the pair of holding members 36 rotate from the retracted position to the holding position.
  • the cutting blade 38 is moved closer to the pressing region Gx of the glass ribbon G, and one of the cutting blades 38 is turned while being pressed against the glass ribbon G.
  • the pressing force value of the cutting blade 38 is set to the first pressing force value
  • the turning speed value of the cutting blade 38 is set to the first turning speed value.
  • the other cutting blade 38 is rotated while being pressed against the right side portion G2 of the glass ribbon G, and a scribe line is engraved on the other end portion in the width direction of the glass ribbon G, thereby cutting the right side portion G2. do.
  • the interval between when one of the cutting blades 38 performs the pressing operation and when the other cutting blade 38 performs the pressing operation is 0.1 to 1.0 seconds (preferably 0.1 to 0.1 seconds). 7 seconds).
  • the pair of holding members 36 rotate from the holding position to the retracted position within one second after the cutting is completed. After that, when the glass ribbon G is conveyed by a predetermined length, the pair of holding members 36 are again rotated from the retracted position to the holding position, and the same cutting operation as described above is performed. Such a cutting operation is repeated as long as the glass ribbon G is conveyed in a state in which it has a vertically elongated narrow missing portion Gz at a portion slightly displaced to one side from the central portion in the width direction.
  • FIG. 13 shows a third example of cutting processing performed by the second cutting device 3.
  • FIG. 13 shows a third example of cutting processing performed by the second cutting device 3.
  • FIG. in this third example only one widthwise end portion (the left end portion in the drawing) G3 of the glass ribbon G is conveyed to the vicinity of the cutting position L1. Therefore, as shown in the figure, when the left end portion G3 of the glass ribbon G passes the arrangement position of the sensor 43, only the left end sensor 43 is turned ON. Therefore, in this third example, first, a signal indicating that it is ON is sent from the leftmost sensor 43 to the control section 44, and the control section 44 holds only the left holding member 36 from the retracted position through the rotation controller 45. Rotate to position. In this case, the controller 44 maintains the pressing member 41 in the retracted state.
  • the value of the turning speed of the cutting blade 38 at this time is set to the value of the second turning speed (relatively large value).
  • a scribe line having a relatively deep cut depth is engraved on the left end portion G3 of the glass ribbon G, and the scribe line is strongly pushed by the left cut blade 38, thereby causing a so-called push split. done.
  • the left end portion G3 of the glass ribbon G is cut.
  • the left holding member 36 rotates from the holding position to the retracted position within one second after the cutting is completed.
  • the left holding member 36 rotates again from the retracted position to the holding position, and the same cutting operation as described above is performed. Such a cutting operation is repeated as long as only the left end portion G3 of the glass ribbon G is conveyed. Also when only the right end portion of the glass ribbon G is conveyed, only the right end sensor 43 is turned ON, and the right holding member 36 and the right cutting blade 38 perform similar cutting operations.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • FIG. 14 shows a fourth example of cutting processing performed by the second cutting device 3.
  • the control unit 44 maintains the pressing member 41 in the retracted state as in the third example described above. Therefore, bending stress is not applied to the widthwise end portions G4 and G5 of the glass ribbon G.
  • FIG. Under this state the control unit 44 projects the extending/retracting rods 55a of the fluid pressure cylinders 55 on both the left and right sides to move the cutting blades 38 on the left and right sides closer to the pressing area Gx of the glass ribbon G, respectively. From this state, the control unit 44 causes the cutting blades 38 on both the left and right sides to press the widthwise end portions G4 and G5 of the glass ribbon G, respectively.
  • the cutting blades 38 on both the left and right sides rotate while pressing the width direction end portions G4 and G5 of the glass ribbon G, respectively.
  • the pressing force values of the cutting blades 38 on both the left and right sides are all set to the second pressing force value (relatively large value).
  • the turning speed values of the left and right cutting blades 38 are all set to the second turning speed value (relatively large value). Therefore, in this fourth example, similarly to the above-described third example, the scribe lines engraved on both width direction end portions G4 and G5 of the glass ribbon G are strongly pushed in by the cutting blades 38 on both left and right sides. , So-called Oshiwari is performed.
  • the left end portion G4 and the right end portion G5 of the glass ribbon G are cut.
  • the cutting operation in this case is performed simultaneously with the cutting blade 38 on the right side and the cutting blade 38 on the left side, but may be performed with a time lag as in the first and second examples.
  • the left and right holding members 36 rotate from the holding position to the retracted position.
  • the left and right holding members 36 are again rotated from the retracted position to the holding position, and the same cutting as described above is performed. action is performed.
  • Such a cutting operation is repeated as long as only the width direction end portions G4 and G5 of the glass ribbon G are conveyed.
  • the glass ribbon G is molded by the overflow down-draw method, but it may be molded by other down-draw methods such as the slot down-draw method and the redraw method.
  • the glass ribbon G is cut by folding along the scribe line S in the first cutting step, but it may be cut by other methods such as laser splitting and laser fusion cutting.
  • the second cutting device 3 is arranged below the first cutting device 2, but these two devices 2, 3 are arranged in parallel so that part or all of them overlap in the vertical direction. good too.
  • the body frame 31 of the second cutting device 3 is held at a fixed position, and when the first cutting device 2 is used, the holding member 36, the cutting blade 38 and the pressing member 41 are moved to the first cutting device.
  • the cutting device 2 may be retracted to a position that does not interfere with its operation.
  • the first cutting device 2 and the second cutting device 3 may be mounted (installed) on the same floor wall 64 .
  • the glass ribbon G is cut without moving the body frame 31 of the second cutting device 3, but the glass ribbon G may be cut while moving the body frame 31 in the front-rear direction.
  • the disk-shaped cutting blade 38 is used to cut the glass ribbon G, but a cutting blade of another shape may be used as long as it has a cutting edge.
  • three sensors 43 are arranged in the width direction, but four or more sensors 43 may be arranged in the width direction.
  • the cutting blade 38 is moved in the width direction of the glass ribbon G by pivoting the cutting blade 38. You may make it move the cutting edge 38 in the width direction of the glass ribbon G by moving parallel to both main surfaces Ga and Gb.
  • the value of the cutting element is automatically changed by the control device 42, but the value of the cutting element may be changed by an operator's operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Un procédé de fabrication d'une plaque en verre comprend : une première étape de coupe pour couper un ruban en verre (G), qui est transporté tout en étant mis en forme, le long de la direction de la largeur avec un premier dispositif de coupe (2) pour découper une plaque en verre ; et une seconde étape de coupe pour, lorsque le premier dispositif de coupe (2) ne se trouve pas en fonctionnement, couper le ruban en verre (G) avec un second dispositif de coupe (3) muni d'une lame de coupe (38), qui comprime le ruban en verre (G) et se déplace dans la direction de la largeur, et un élément de maintien (36) qui maintient le ruban en verre (G) et reçoit la force de compression de la lame de coupe (38), dans la seconde étape de coupe, les valeurs de la force de compression de la lame de coupe (38) et/ou de la vitesse de déplacement de la lame de coupe (38) dans la direction de la largeur étant modifiées.
PCT/JP2022/036300 2021-10-26 2022-09-28 Procédé de fabrication d'une plaque en verre et dispositif de coupe d'un ruban en verre WO2023074243A1 (fr)

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CN202280057862.0A CN117858850A (zh) 2021-10-26 2022-09-28 玻璃板的制造方法以及玻璃带的切断装置

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JP2021174655A JP2023064394A (ja) 2021-10-26 2021-10-26 ガラス板の製造方法及びガラスリボンの切断装置
JP2021-174655 2021-10-26

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08283032A (ja) * 1995-04-14 1996-10-29 Asahi Glass Co Ltd 板硝子の切断方法及び装置
JP2016088785A (ja) * 2014-10-31 2016-05-23 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス板の製造方法、及び、ガラス板の製造装置
JP2016088784A (ja) * 2014-10-31 2016-05-23 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス板の製造方法、及び、ガラス板の製造装置
JP2018090446A (ja) * 2016-12-02 2018-06-14 日本電気硝子株式会社 ガラス板の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08283032A (ja) * 1995-04-14 1996-10-29 Asahi Glass Co Ltd 板硝子の切断方法及び装置
JP2016088785A (ja) * 2014-10-31 2016-05-23 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス板の製造方法、及び、ガラス板の製造装置
JP2016088784A (ja) * 2014-10-31 2016-05-23 ＡｖａｎＳｔｒａｔｅ株式会社 ガラス板の製造方法、及び、ガラス板の製造装置
JP2018090446A (ja) * 2016-12-02 2018-06-14 日本電気硝子株式会社 ガラス板の製造方法

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