WO2025150902A1 - Procédé et appareil de fabrication d'une feuille de verre à partir d'un ruban de verre - Google Patents

Procédé et appareil de fabrication d'une feuille de verre à partir d'un ruban de verre

Info

Publication number
WO2025150902A1
WO2025150902A1 PCT/KR2025/000463 KR2025000463W WO2025150902A1 WO 2025150902 A1 WO2025150902 A1 WO 2025150902A1 KR 2025000463 W KR2025000463 W KR 2025000463W WO 2025150902 A1 WO2025150902 A1 WO 2025150902A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass ribbon
glass
center bar
bending
cutting path
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/KR2025/000463
Other languages
English (en)
Inventor
Hyung Sang Roh
Young Seon Park
Sung Wook Jung
Mun Hwan Seol
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corning Inc
Original Assignee
Corning Inc
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 Corning Inc filed Critical Corning Inc
Publication of WO2025150902A1 publication Critical patent/WO2025150902A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
    • C03B33/0235—Ribbons
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
    • C03B33/03—Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
    • B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
    • B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
    • B65G49/061—Lifting, gripping, or carrying means, for one or more sheets forming independent means of transport, e.g. suction cups, transport frames
    • 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
    • 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
    • C03B33/037—Controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2249/00—Aspects relating to conveying systems for the manufacture of fragile sheets
    • B65G2249/04—Arrangements of vacuum systems or suction cups
    • B65G2249/045—Details of suction cups suction cups

Definitions

  • the disclosure relates to an apparatus and method for manufacturing a glass sheet from a glass ribbon.
  • the disclosure relates to an apparatus and method for manufacturing a glass sheet by bending and nicking a glass ribbon.
  • a roll-to-sheet (R2S) assembly has been used as a system for manufacturing a glass sheet (or a glass substrate) by cutting an ultrathin glass ribbon (or a glass web).
  • a glass ribbon is cut by pressing the glass ribbon with a center bar with constant force along a predetermined broken line path of the glass ribbon and/or scoring the glass ribbon.
  • a glass ribbon is typically manufactured such that edge portions of opposite sides of the glass ribbon perpendicular to a transfer direction are formed with beads about 2 to 3 times thicker than a quality area that is a middle portion of the glass ribbon between the beads.
  • stress is applied by applying constant pressure to the glass ribbon in a conventional manner, less internal stress occurs in the quality area that is relatively thin, whereas greater internal stress occurs in the bead portion that is relatively thick. Accordingly, an accurate cut cross-section may not be formed along a predetermined cutting path in the quality area or multiple cracks may be generated in the bead portion.
  • a roll-to-sheet (R2S) assembly has been used as a system for manufacturing a glass sheet (or a glass substrate) by cutting an ultrathin glass ribbon (or a glass web).
  • a glass ribbon is cut by pressing the glass ribbon with a center bar with constant force along a predetermined broken line path of the glass ribbon and/or scoring the glass ribbon.
  • a glass ribbon is typically manufactured such that edge portions of opposite sides of the glass ribbon perpendicular to a transfer direction are formed with beads about 2 to 3 times thicker than a quality area that is a middle portion of the glass ribbon between the beads.
  • stress is applied by applying constant pressure to the glass ribbon in a conventional manner, less internal stress occurs in the quality area that is relatively thin, whereas greater internal stress occurs in the bead portion that is relatively thick. Accordingly, an accurate cut cross-section may not be formed along a predetermined cutting path in the quality area or multiple cracks may be generated in the bead portion.
  • FIG. 1 is a view schematically showing examples of possible cuts of a glass sheet
  • FIG. 2 shows a schematic side view (a) and a schematic front view (b) of a system for manufacturing a glass sheet from a glass ribbon according to the present disclosure
  • FIG. 3 is a top view of a singulation apparatus of FIG. 2 according to the present disclosure
  • FIGs. 4A and 4B are schematic side views of the singulation apparatus of FIG. 2 before bending the glass ribbon and after bending the glass ribbon, respectively, according to the present;
  • FIG. 5 is a schematic view showing cutting modes according to a change in displacement of opposite end portions of a center bar in primary bending and secondary bending, in a method of manufacturing a glass sheet from a glass ribbon, according to the present disclosure
  • FIG. 7 is a view showing a change in a radius R of curvature of a bent portion of a glass ribbon according to a change in overhang between a first clamping bar and a second clamping bar in a singulation apparatus according to the present disclosure
  • FIG. 8 is a schematic flowchart of a method of manufacturing a glass sheet from a glass ribbon, according to the present disclosure
  • FIG. 10 is a graph showing a correlation of tensile stress ⁇ on a glass ribbon according to the displacement of a center bar when bending stress is applied to each of two ultrathin glass ribbons having thicknesses of 75 ⁇ m and 100 ⁇ m, according to the present disclosure.
  • the system 200 may further include at least one edge position control (EPC) sensor 240 for detecting and controlling the position of a side surface edge of the glass ribbon 210 between the guide roller 230 and the singulation apparatus 250.
  • the system 200 may further include the unloader (e.g., a vacuum hand) 260 for unloading a cut glass sheet and an interleaf rewinder 270 for rewinding the glass ribbon 210.
  • the unloader e.g., a vacuum hand
  • an interleaf rewinder 270 for rewinding the glass ribbon 210.
  • the primary bending for applying weak stress to the predetermined cutting path of the glass ribbon 210 may generate a basic stress field in the cutting path of the glass ribbon 210 before performing nicking, thereby forming a straight guideline for propagating a crack generated later in the secondary bending.
  • Nicking at least one point of the cutting path of the glass ribbon 210 generates a defect in the glass ribbon 210 from which a crack is initiated during the secondary bending.
  • a crack is initiated from the nicked portion that is weakened by the defect, and thus the crack may be propagated straight along the guideline formed during the primary bending, thereby minimizing generation of multiple cracks in the bead portion. Accordingly, final cutting may be performed after the secondary bending so that when a glass sheet is manufactured, manufacturing yield may be improved in a simple process.
  • the actuator 252 may further include a center bar 254 positioned near a second surface of the glass ribbon at the actuator 252 and at least two clamping bars 255 and 256 positioned near the first surface of the glass ribbon at the actuator.
  • the center bar 254 may bend the glass ribbon 210 by applying stress to the glass ribbon 210 along the predetermined cutting path in a direction transverse to the receiving direction of the glass ribbon 210 from the roller 251, and thus tensile stress may be generated so that a crack may be propagated along the cutting path.
  • the actuator 252 may include two or more sub-actuators, and may include, for example, two servo motors. As illustrated in FIG. 3, when two sub-actuators (e.g., servo motor) 252 are used, the two sub-actuators 252 may be respectively connected to a first and a second end portions of the center bar 254 and move respectively the first and second end portions of the center bar 254 perpendicularly to the receiving direction of the glass ribbon from the roller 251.
  • two sub-actuators e.g., servo motor
  • the first and second sub-actuators may move the first and second end portions of the center bar 254 perpendicularly to the receiving direction of the glass ribbon toward the first surface of the glass ribbon 210 and make respectively different displacements to the first and second end portions of the center bar 254. This separate movements of the first and second end portions of the center bar 254 allow different levels of stresses to be applied to the first and second end portions of the glass ribbon 210 along the predetermined cutting path.
  • the displacement (d) of the glass ribbon 210 in the direction toward the clamping bars 255 and 256 will be 0 mm.
  • the displacement (d) may affect the stress applied for bending.
  • the actuator 252 may apply first average stress to the glass ribbon 210 by moving the center bar and the at least two clamping bars so that the glass ribbon is bent by a first average displacement from a position of the receiving glass ribbon in a direction of from the second surface to the first surface.
  • the actuator 252 may apply second average stress to the glass ribbon 210 by moving the center bar so that the glass ribbon is bent by a second average displacement from the position of the receiving glass ribbon in the direction of from the second surface to the first surface.
  • the second average displacement may be greater than the first average displacement A .
  • the displacement d R' of the other end portion of the center bar 254 is set to be smaller than the displacement d 1F' .
  • less stress is applied to the corresponding second end of the glass ribbon contacting the other end portion of the center bar 254 than the corresponding first end of the glass ribbon contacting the one end portion of the center bar 254 along the predetermined cutting path.
  • the internal stress applied to the bead of the second side edge end portion of the glass ribbon may be reduced, thereby minimizing multiple cracks on the bead.
  • FIG. 6 shows a stress distribution when asymmetrical stress is applied by applying a greater stress to the bead portion 216 at the other end portion of the glass ribbon than the bead 212 at the one end portion of the bend portion of the glass ribbon 210 during the primary bending according to some embodiments. Accordingly, the bead portion at the other end portion of the glass ribbon shows the maximum stress ST max .
  • FIG. 7 is a view showing a change in a radius R of curvature of the bent portion of the glass ribbon 210 according to a change in overhang OH in the singulation apparatus 250 according to the present disclosure.
  • the displacement of the center bar 254 and the displacements of the clamping bars 255 and 256 are set to the same condition in (a) and (b), and only the overhang between the first clamping bar 255 and the second clamping bar 256 is set to 40 mm in (a) and 30 mm in (b), respectively.
  • a bending level of (b) is greater than that of (a). Accordingly, the applied stress increases as the overhang decreases. In contrast, as the overhang increases, the process window with respect to a thickness change of the glass ribbon may be widened.
  • the overhang OH affects the curvature of the bent portion of the glass ribbon 210 during bending, thereby affecting the applied stress to the bent portion of the glass ribbon 210.
  • the overhang OH may be in a range from 0 mm to 40mm, a range from 10 mm to 40 mm, a range from 20 mm to 40 mm, a range from 28 mm to 40 mm, or a range from 32 mm to 40 mm.
  • the widest process window is obtainable when the overhang is in a range from 28 mm to 40 mm.
  • the widest process window is obtainable when the overhang is in a range from 32 mm to 40 mm.
  • FIG. 8 is a schematic flowchart of a method of manufacturing a glass sheet from a glass ribbon, according to the present disclosure.
  • the method of manufacturing a glass sheet from a glass ribbon may include providing the singulation apparatus 250 with the glass ribbon 210 in operation S810; performing primary bending on the glass ribbon 210 along a predetermined cutting path thereof by applying a first average stress thereto S820; nicking at least one point of the bent portion of the glass ribbon 210 using the nicking device 253 S830; and performing secondary bending on the bent portion of the glass ribbon 210 by applying a second average stress thereto S840.
  • the second average stress may be greater than the first average stress.
  • the method may further include cutting a secondary bent portion of the glass ribbon 210 S850.
  • the glass ribbon 210 may be provided from the spool unwinder 220 to the singulation apparatus 250 through the guide roller 230, and during a cutting process the position and tension of the glass ribbon 210 may be maintained. In this state, the glass ribbon 210 is provided to a space between the center bar 254 and the at least two clamping bars 255 and 256.
  • the center bar 254 is set to have the first average displacement H 11 and presses the glass ribbon 210 toward the clamping bars 255 and 256, applying stress to the glass ribbon, thereby performing primary bending.
  • the center bar 254 may apply stress, for bending, to one end portion (e.g., the front end portion) of the predetermined cutting path of the glass ribbon 210 that is less than the stress applied to the other end portion (e.g., the rear end portion) of the predetermined cutting path.
  • At least one point of the bent portion of the glass ribbon 210 may be nicked using the nicking device 253.
  • a cutting wheel or a laser device may be used as the nicking device 253, but the disclosure is not limited thereto.
  • at least one of a cutting wheel or a laser device may be used as the nicking device 253, but the disclosure is not limited thereto.
  • the center bar 254 moves by the second average displacement and pressurizes the glass ribbon 210 toward the clamping bars 255 and 256, applying stress to the glass ribbon, thereby performing secondary bending.
  • the center bar 254 may apply stress, for bending, to the one end portion (e.g., the front end portion) of the predetermined cutting path of the glass ribbon 210 that is greater than the stress applied to the other end portion (e.g., the rear end portion) of the predetermined cutting path.
  • a crack may be propagated from the bead at the one end portion to the other bead portion at the other end portion of the predetermined cutting path of the glass ribbon 210.
  • operation S850 cutting along the predetermined cutting path of the glass ribbon 210 may be performed.
  • the glass ribbon 210 may be cut along the predetermined cutting path by applying greater stress to the glass ribbon 210 through the center bar 254 than the stress applied to the glass ribbon 210 during operation S840 for the secondary bending of the glass ribbon 210.
  • FIG. 9 is a graph schematically showing crack propagation modes according to the average displacement H 1 of the center bar 254 set in the primary bending on a Y-axis and the secondary bending on an X-axis in a method of manufacturing a glass sheet from a glass ribbon.
  • FIG. 9 shows results of crack propagation modes with respect to the coordinates of a Y-axis indicating the displacement of a center bar in the primary bending and an X-axis indicating the displacement of a center bar in the secondary bending, for a glass ribbon in which the quality area in the middle of the ribbon has a 100 ⁇ m thickness.
  • a crack is generated from when the center bar displacement d of the Y-axis in the primary bending is about 0.8 mm.
  • the displacement d is about 1.0 mm or more.
  • the center bar displacement d of the Y-axis in the primary bending exceeds 1.4 mm
  • a crack is initiated without the secondary bending so that the displacement d of 1.4 mm or less may be appropriate.
  • the displacement d of the center bar of the X-axis in the secondary bending may be 0.8 mm or more at which generation of a crack is stopped, and it may be appropriate that the displacement is set to 1.8 mm or less at which multiple cracks are generated.
  • FIG. 10 is a graph showing a correlation of tensile stress ⁇ generated in each of two glass ribbons having thicknesses of 75 ⁇ m and 100 ⁇ m according to the displacement of the center bar 254 when bending stress is applied to each of the glass ribbons, according to the present disclosure.
  • the graphs of FIG. 10 show different stresses generated in the beads located at both side edge portions of each of the two glass ribbons and the quality area 214, which is a middle portion between the beads 212 and 216.
  • the maximum bending stress ⁇ max of the quality area that is a middle portion is 20.0 Mpa and the maximum bending stress ⁇ max of the bead area is 60.0 Mpa.
  • the maximum bending stress ⁇ max of the quality area that is a middle portion is 20.0 Mpa and the maximum bending stress ⁇ max of the bead area is 60.0 Mpa.
  • the bending stress ⁇ max applied to the quality area of a glass ribbon exceeds 20.0 Mpa (in this case, the maximum bending stress ⁇ max of the bead area may be 60.0 Mpa)
  • a crack may be initiated and start to propagate along the predetermined cutting path of the glass ribbon 210, transverse to the receiving direction of the glass ribbon 210.
  • the average displacement of the center bar 254 on the graph is between about 0.75 mm and about 1 mm.
  • the internal stress generated in the beads 212 of the glass ribbon is in a range of about 60 Mpa to about 100 Mpa during at least one of the primary bending operation S820 and the secondary bending operation S840.
  • a glass sheet without multiple cracks may be manufactured by a simplified and efficient process with high yield and at low cost.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Un appareil de fabrication d'une feuille de verre à partir d'un ruban de verre selon la présente invention comprend un rouleau pour adresser le ruban de verre à l'appareil, un actionneur configuré pour courber le ruban de verre le long d'un trajet de coupe prédéterminé par application d'une première contrainte moyenne et, après encoche du ruban de verre, pour courber davantage une partie courbée du ruban de verre par application d'une seconde contrainte moyenne, et un dispositif de formation d'encoches pour encocher au moins un point de la partie courbée du ruban de verre, la seconde contrainte moyenne étant supérieure à la première contrainte moyenne. Selon la configuration décrite ci-dessus, une feuille de verre sans fissures multiples peut être fabriquée par un procédé plus simple de telle sorte que des feuilles de verre peuvent être fabriquées avec un rendement élevé et à faible coût.
PCT/KR2025/000463 2024-01-12 2025-01-08 Procédé et appareil de fabrication d'une feuille de verre à partir d'un ruban de verre Pending WO2025150902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2024-0005590 2024-01-12
KR1020240005590A KR20250110996A (ko) 2024-01-12 2024-01-12 유리 리본으로부터 유리 시트를 제조하는 장치 및 방법

Publications (1)

Publication Number Publication Date
WO2025150902A1 true WO2025150902A1 (fr) 2025-07-17

Family

ID=96387308

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2025/000463 Pending WO2025150902A1 (fr) 2024-01-12 2025-01-08 Procédé et appareil de fabrication d'une feuille de verre à partir d'un ruban de verre

Country Status (4)

Country Link
KR (1) KR20250110996A (fr)
CN (1) CN120349094A (fr)
TW (1) TW202545839A (fr)
WO (1) WO2025150902A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101495418A (zh) * 2005-05-17 2009-07-29 康宁股份有限公司 从移动的脆性材料带状物上分离脆性材料板的方法和设备
US20120247154A1 (en) * 2011-03-30 2012-10-04 Anatoli Anatolyevich Abramov Methods of fabricating a glass ribbon
WO2014209833A1 (fr) * 2013-06-25 2014-12-31 Corning Incorporated Procédé et appareil de séparation d'une feuille de verre d'un ruban de verre mobile
US20180362388A1 (en) * 2015-12-01 2018-12-20 Corning Incorporated Glass web separating devices and methods
US20200223735A1 (en) * 2017-09-26 2020-07-16 Corning Incorporated Glass manufacturing apparatus and methods for separating a glass ribbon

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101495418A (zh) * 2005-05-17 2009-07-29 康宁股份有限公司 从移动的脆性材料带状物上分离脆性材料板的方法和设备
US20120247154A1 (en) * 2011-03-30 2012-10-04 Anatoli Anatolyevich Abramov Methods of fabricating a glass ribbon
WO2014209833A1 (fr) * 2013-06-25 2014-12-31 Corning Incorporated Procédé et appareil de séparation d'une feuille de verre d'un ruban de verre mobile
US20180362388A1 (en) * 2015-12-01 2018-12-20 Corning Incorporated Glass web separating devices and methods
US20200223735A1 (en) * 2017-09-26 2020-07-16 Corning Incorporated Glass manufacturing apparatus and methods for separating a glass ribbon

Also Published As

Publication number Publication date
KR20250110996A (ko) 2025-07-22
CN120349094A (zh) 2025-07-22
TW202545839A (zh) 2025-12-01

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