CN105228963A - From the method for continuous glass ribbon separation of glasses sheet - Google Patents

From the method for continuous glass ribbon separation of glasses sheet Download PDF

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Publication number
CN105228963A
CN105228963A CN201480028450.XA CN201480028450A CN105228963A CN 105228963 A CN105228963 A CN 105228963A CN 201480028450 A CN201480028450 A CN 201480028450A CN 105228963 A CN105228963 A CN 105228963A
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CN
China
Prior art keywords
wheel
glass ribbon
contrary
impression
pearl
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Pending
Application number
CN201480028450.XA
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Chinese (zh)
Inventor
L·王
郑哲明
周乃越
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Corning Inc
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Corning Inc
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Application filed by Corning Inc filed Critical Corning Inc
Publication of CN105228963A publication Critical patent/CN105228963A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00Re-forming shaped glass
    • C03B23/02Re-forming glass sheets
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06Forming glass sheets
    • C03B17/065Forming profiled, patterned or corrugated sheets
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00Severing cooled glass
    • C03B33/02Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
    • C03B33/0215Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the ribbon being in a substantially vertical plane
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/50Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57Improving the yield, e-g- reduction of reject rates

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  • 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

From the method for continuous glass ribbon separation of glasses sheet, wherein, the contrary wheel rotated comprises sawtooth, and make when wheel turns, the sawtooth on a wheel is aimed at the sawtooth on another wheel.The pearl part contact of sawtooth and the glass ribbon aimed at, and pinch between the sawtooth of aligning and clamp band, to form impression.Pinch the thickness that folder reduces pearl, thus weaken pearl, and after pearl is cooled to Hookean body, contributes to crackle diffusion and run through pearl.

Description

From the method for continuous glass ribbon separation of glasses sheet
The application according to 35U.S.C. § 119, the right of priority of No. 61/824169th, the U.S. Provisional Application Ser requiring on May 16th, 2013 to submit to, based on this application that it is incorporated herein by reference in full herein.
Background technology
Technical field
Relate generally to of the present invention, from the method for continuous glass ribbon separation of glasses sheet, being specifically related to the pearl region by weakening glass ribbon, reducing the method making crackle diffuse through the whole width institute energy requirement of glass ribbon.
Technical background
Usually, in fusion draw machine (FDM), the flex apart after being rule by machinery, from the sheet glass that strip material separated is formed by fusion process.Glass ribbon has shape usually, or in other words, due to the residual heat stress in glass, it all bends in horizontal and vertical direction and exceeds plane.Belt shape is also relevant along the existence of the thickening (pearl) of the transverse edge of band to position, and this thickening (pearl) is far thicker than the centre portions of band and on glass, produces obvious thermal gradient and stress gradient.
Obtained glass ribbon is thinner, then pearl thickness becomes larger with the ratio of the thickness of band central zone.In addition, band rigidity reduces along with the increase of sheet glass size and/or the reduction of thickness of glass, and this causes the more arc of the sheet glass cut from band usually.Larger pearl-center thickness than with the compound action of less band rigidity for ruling and maintaining the stability of band in sepn process and control band and move and create obvious challenge.Owing to drawing the reduction of stability, the process window bottom forming technology window and draw area all narrows, and produces higher process fluctuations frequency.Narrow process window becomes key issue, because the band in line and drawing caused by sepn process moves not only affect sheet glass cutting process itself, also diffuses into glass forming process and finally can affect final glass quality.
Another challenge in fusion forming technology forms hollow bead (clearance in the welded bonds in pearl), and this is because the difficulty of the aging of partially-formed main body and the flowing formed in the region of pearl and thermal control causes.Once define hollow bead, line and sepn process window even can become narrower, and in sheet sepn process, not controlled cracking can occur.
Conventional mechanical cutting method is included between pearl and rules to glass ribbon, is then separated by such as mechanical bend.On pearl, line is very difficult and instability, this is because thickness is in the unexpected increase of Zhu Chu.The major defect of existing cutting technique is, due to structural rigidity and minimized crack surfaces, to thicken and uncrossed pearl provides obvious resistance for flex apart process.As a result, run through pearl because separation crackle cannot spread, the crackle diffusion of Zhu Chu can cause folding angle (dogear) or vertical crack.When target glass thickness becomes thinner, this situation is even more serious.
Therefore, wish that the little bending angle of introducing or lower energy carry out separation of glasses sheet, move because which introduce less sheet material and less impact is produced for drawing stability.
Summary of the invention
Be separated at the glass drawing bottom and need obviously more energy to carry out separation of glasses to run through pearl, this ratio due to pearl thickness and thickness of strip and sheet form caused.In some embodiments, only to carry out glass ribbon in the quality region of (laterally between pearl) glass ribbon and be separated line.This becomes more common in thinner glass ribbon.In pearl, realize " good " open-delta winding is impossible, because mechanical tracing wheel has skipped coarse bead surface.Owing to crackle cannot be introduced bead surface, need extra energy to carry out curved glass and be separated, cause the more disturbance of fusion forming technology for top.If there is hollow bead, then can more likely ftracture in sepn process.
The invention describes such method, the method is by fusion draw machine and when being still in the lifting parts of viscosity (such as visco-elasticity) when pearl, to both sides pearl all symmetrical impressions of machinery introducing, thus when there is the thickened beads of glass ribbon, reducing energy and carrying out more reliable sepn process.Through the energy that the pearl of impression reduces local bending rigidity and drawing bottom (glass ribbon is in elastic solid) and carry out needed for sheet separation, this so that contribute to crackle diffusion, reduce sheet and move and add shape stability by stress concentration.
In addition, can be used as through the pearl of impression and diffuse into the guiding in pearl region along the guiding of the tracing wheel across draw direction and/or line with the required much lower bending energy crackle that makes to rule.Therefore, be separated and can reduce band by realizing low bending (low-yield) and move and increase drawing stability, and reduce significantly or eliminate the pearl detachment defects in sepn process, the folding angle (diffusion angularly) of such as crackle or spread vertically upward.
In the pearl region of sheet glass, a series of impression weakens pearl, and thus sheet glass after reducing be separated needed for bending angle and energy.Bring out impression with predetermined frequency machinery in shaped region, thus for each partitioning cycle, impression is aimed at later scribes.Impression is symmetrical along two transverse edges of glass ribbon.Ideally, the thickness of glass through impression can be the thickness of glass identical with quality region thickness of glass.
Therefore, in one embodiment, disclose the method from continuous glass ribbon separation of glasses sheet, the method comprises: form continuous glass ribbon leaving behind in technique; When being in viscous state, take turns contrary with a pair of glass ribbon is engaged (engage), each wheel in described a pair contrary wheel comprises from its outstanding sawtooth, wherein, described contrary wheel is synchronous, thus making in the rotation process of contrary wheel, the sawtooth of a wheel in described a pair contrary wheel is aimed at the sawtooth of contrary wheel, produces contrary impression in the both sides at an edge of glass ribbon; After glass ribbon cools is elastic stage, glass ribbon is rule, to form line, line is aimed at contrary impression; And apply tensile stress in line, thus by bending from glass ribbon separation of glasses sheet.Can engage with the marking knife along glass ribbon width by making glass ribbon, forming line.Described each wheel of taking turns on the contrary for a pair can comprise single sawtooth or multiple sawtooth.In some embodiments, the thickness of the glass ribbon between contrary impression is basic identical with the thickness of the glass ribbon in the centre portions of glass ribbon.
Supplementary features of the present invention and advantage is proposed in the following detailed description, Partial Feature wherein and advantage to those skilled in the art according to make description and easy understand, or by implement comprise following detailed description, claims and accompanying drawing the present invention as herein described and be familiar with.
Should be understood that foregoing general description and the following detailed description are all embodiments of the present invention, be used to provide and understand the character of embodiment and the overview of characteristic or framework.What comprise accompanying drawings provides further understanding of the invention, and accompanying drawing is incorporated in the present specification and forms a part for specification sheets.Drawings illustrate various embodiment of the present invention, and be used for together with the description explaining the principle of embodiment and operation.
Accompanying drawing explanation
Fig. 1 is according to the present invention, for drawing the front view of the example devices of continuous glass ribbon.
Fig. 2 is the cross-sectional view of the example devices for drawing continuous glass ribbon of the Fig. 1 seen from its end;
Fig. 3 is showing the cross-sectional view of the glass ribbon of pearl;
Fig. 4 is pinched the cross-sectional view of the pearl part of the glass ribbon of folder by the wheel rotated on the contrary, the wheel of wherein each contrary rotation is included in the sawtooth forming impression in glass ribbon pearl;
Fig. 5 A-5C show along with the sawtooth of the wheel of the contrary rotation of Fig. 4 be moved into aim to pinch folder glass ribbon pearl time, the time sequence of the position of the contrary wheel rotated;
Fig. 6 is the front view of the segment glass band of glass ribbon when declining from profiled body, wherein, determines to be formed the time of impression thus makes the layout of impression consistent with the layout of line;
Fig. 7 display has the wheel of a more than sawtooth;
Under Fig. 8 is presented at several regulation bending conditions, the relation of the position of the longitudinal cenlerline of the model perpendicular stress in glass ribbon and distance glass ribbon.
Embodiment
Detailed in various embodiment of the present invention below, the example of these embodiments is shown in the drawings.Whenever possible, use identical Reference numeral to represent same or similar part in all of the figs.
Fig. 1 and 2 shows exemplary glass draw machine, specifically for the formation of the fused glass draw machine (FDM) 10 of sheet glass.According to Fig. 1 and 2, by import 16, melten glass 12 is provided to profiled body 14.Profiled body 14 comprises along the upper surface of profiled body 14 groove 18 extending longitudinally.Groove 18 is crossed in melten glass 12 overflow, and flows through convergence profiled surface 20 as the molten glass flow separated.Then, the congruence that the molten glass flow separated meets along convergence profiled surface and root 22 is closed (fusion), to form continuous glass ribbon 24.Pulling roll 26 is from root 22 drawing glassribbons 24.
Fig. 3 shows the cross-sectional view of exemplary glass band 24.Drawing power and surface tension are tended to produce thickening, so-called pearl 28 along the transverse edge of glass ribbon.The centre portions 30 of glass ribbon 24 extends between pearl, so-called quality region, because centre portions is the part that glass ribbon can carry out commercial distribution after eliminating pearl.But, in some sheet glass manufacturing operations, first from glass ribbon separation of glasses sheet, remove pearl afterwards.Therefore, pearl proposes unique challenge for sepn process.
Usually, in glass ribbon, line 32 (see Fig. 1) is formed with horizontal direction.Can form line mechanically, wherein, tracing wheel or other scribe member contact with glass ribbon and pass across the width of glass ribbon.In other embodiments, line can be formed by laser.As used herein, line represents the line for the physical damage of glass ribbon, such as, extend into the open-delta winding of the thickness of glass ribbon at least partly.Therefore, line also can be called score line.In many cases, the pearl thickened hinders and form line on the whole width of glass ribbon.Therefore, line does not extend in pearl usually.Once form line, such as, across centre portions 30, usually in line, produce tensile stress (that is, perpendicular to line) by curved glass band.But, thicker, do not needed the energy larger to glass ribbon input, with the pearl making crackle diffuse through glass ribbon by the pearl of ruling.Once crackle diffuses through pearl, excessive energy is discharged, and can form the mobile disturbance by glass ribbon, and cause disturbance to the glass ribbon in solidification zone.Solidification zone is that glass ribbon changes the position of Hookean body into from viscous liquid.This disturbance can produce the stress be frozen in glass ribbon, and such as can affect the shape of the sheet glass be separated from glass ribbon.Therefore, increase the easness that crackle can diffuse through pearl, can reduce follow-up from the residual stress the sheet glass that glass ribbon is separated.
According to embodiment disclosed herein, symmetrical impression is introduced at edge section (the such as pearl region) machinery merging the glass ribbon in draw machine, thus be reduced in the energy drawing bottom and carry out needed for sheet separation, this so contribute to crackle diffusion, reduce sheet and move and add shape stability by stress concentration.Therefore, form a series of impression in the edge section of glass ribbon to weaken pearl, thus reduce from the angle of bend needed for strip material separated sheet glass and energy.
The part of a longitudinal edge of the glass ribbon 24 that Fig. 4 display declines with draw direction 33.The position of the wheel 34 of contrary rotation is the inverse relationship of the longitudinal edge of glass ribbon, and make to have an adjacent wheel on every side at edge, wherein, each wheel 34 comprises projection, i.e. sawtooth 36.By suitable web member (not shown), by wheel and motivating force (such as, electro-motor or other mechanical actuation devices) be connected, and wheel is synchronously become to make when wheel 34 rotates, sawtooth 36 on each wheel is aimed at the phase reverse sawtooth on relative wheel and adjacent, as shown in the dotted line 38 of Fig. 4.Therefore, when wheel turns, the sawtooth on each wheel contacts with the glass ribbon of movement, at the Zhu Chu of the glass ribbon of movement, forms contrary impression 40 in surface.In other words, the sawtooth of aligning is pinched at Zhu Chu and is clamped glass ribbon, thus reduces the pearl thickness at sawtooth and glass contact place.
Be symmetrically formed impression at the opposite edge place of the glass ribbon of movement, mean the impression horizontal aligument formed on the impression of an edge formation and the opposite edge of the glass ribbon of movement of the glass ribbon of movement.
When Fig. 5 A-5C display wheel 34 rotates with relative direction, their sequence of positions.For each wheel, show the radial axle 42 of the corresponding sawtooth on each wheel, thus by the progress of accompanying drawing, can demonstrate when corresponding wheel turns, the radial axle 42 of each wheel how to rotate, and makes sawtooth close to aligning.Each radial axle 42 is divided equally or has substantially been divided the sawtooth on wheel equally, and passes through the rotating shaft 44 of wheel.
In addition, select the diameter of wheel, make in each partitioning cycle process, the score line formed in the glass ribbon of movement by relevant scoring equipment is consistent with the contrary impression formed in the glass ribbon of movement.It should be noted, the spatial frequency of impression is not necessarily consistent with the spatial frequency of the score line formed by scoring equipment.The impression of as used herein, the spatial frequency about impression refers to (on the side of the edge section of glass ribbon) per unit length, such as 2 impressions every meter.The spatial frequency of score line refers to the distance relation between the existence of score line and score line, and such as, along the length of band, every 4 meters produce a score line.It should be understood that in same time, (existence) two score line can not be formed in glass ribbon, because can be separated at the first score line place, produce the second score line afterwards.The spatial frequency of contrary impression can be greater than the spatial frequency of score line, but the spatial frequency of contrary impression should make to form contrary impression often locating score line.Or this can regard as and make when when every bar score line place is from glass ribbon separation of glasses sheet, without the need to forming score line at each impression place.For the length of cutting from band be the sheet glass of L (namely, on the glass ribbon of movement, score line along the every L increment of glass ribbon produces), should select the diameter D of wheel 34 (take turns assuming that each and there is single sawtooth), make L be that positive integer m is multiplied by π and is multiplied by diameter D.In other words, the diameter D of wheel 34 should be selected to make L/m π=D.If m is greater than 1, then the impression formed can be greater than score line.This assumes that glass ribbon only can be rule in the place that sheet glass is to be separated.
A part of glass ribbon that Fig. 6 display declines from (not shown) profiled body 14.Along with glass ribbon declines, at Zhu Chu, the length cycles ground along glass ribbon down forms impression 40.Chalker 46 passes across the width at least partially of glass ribbon, between the pearl 28 of glass ribbon, form line (score line 32).Line is timing (machinery or electronics mode), every bar is rule corresponding with the position of impression 40.Below chalker 46, machinery equipment 48 engages the free end of glass ribbon, and applies bending to glass ribbon.Bend in the score line above machinery equipment and form tensile stress, thus be separated sheet glass from glass ribbon.As described above, carry out pinching folder by wheel 34 and selection of time between being rule by chalker 46 makes press from both sides consistent position and rule with pinching, thus rule and 32 to aim at impression 40.
Be noted that each wheel 23 can have a more than sawtooth from foregoing teachings.Such as, Fig. 7 display has the wheel 34 of two sawtooth of 180 degree apart.In this case, should consider that the sawtooth quantity on each wheel 34 carries out corresponding change to previous equations.
Set up finite element analysis (FEA) model, study pearl indenture concept mentioned above.Fig. 8 display is for by healthy and free from worry EagleXG tMthat glass is formed and there is the exemplary glass band of the pearl through impression, vertical direction stress (unit pound per square inch) and position (the unit millimeter in strip width, mm) relation, wherein, band is bending at impression place with about 6 degree (curves 50) and 12 degree (curve 52), and for the same strip of the pearl had without impression, bend at 6 degree (curves 54) and 12 degree (curve 56).Assuming that exemplary glass band has the thickness of 0.3mm at centre portions, and maximum pearl thickness is about 0.65mm.For the pearl of pearl region through impression, create higher stress, show that pearl is easier to break or more low-yield separation.
It will be apparent to those skilled in the art that and when not departing from requirement the spirit and scope of the present invention, various modifications and changes can be carried out to embodiment disclosed herein.Therefore, the present invention is intended to cover the amendment of present disclosure and variation, as long as these amendments and variation are within the scope of claims and equivalent thereof.

Claims (9)

1., from a method for continuous glass ribbon separation of glasses sheet, described method comprises:
In down draw process, form continuous glass ribbon, described glass ribbon comprises glued portion;
With first, contrary wheel is engaged to the first edge section of described glued portion, described first comprises to each wheel of contrary wheel the projection extended from it, described first becomes to make in the rotation process of described wheel to contrary wheel is synchronous, the projection of a wheel in described one wheel pairs is aimed at the projection of contrary wheel, thus produces contrary impression in the first edge section of described glass ribbon;
Rule to described glass ribbon after described glass ribbon cools to elastic stage, thus form score line on the width of described glass ribbon, described score line is aimed at the contrary impression in described first edge section; And
Described score line applies tensile stress, makes from described glass ribbon separation of glasses sheet.
2. the method for claim 1, is characterized in that, brings the described score line of formation by engaging described glass with scribe member.
3. the method for claim 1, is characterized in that, described that only comprises single projection to each wheel of contrary wheel.
4. the method for claim 1, is characterized in that, described that comprises multiple projection to each wheel of contrary wheel.
5. the method for claim 1, is characterized in that, the thickness of the described glass ribbon between contrary impression is basic identical with the thickness of the described glass ribbon in the centre portions of described glass ribbon.
6. the method for claim 1, it is characterized in that, described glass ribbon comprises second edge portion, it is interior and relative with described first edge section that described second edge portion is in described glued portion, described method also comprises with second the described second edge portion of contrary wheel engagement, described second comprises to each wheel of contrary wheel the projection extended from it, described second becomes to make in the rotation process of described wheel to contrary wheel is synchronous, the projection of a wheel in described second pair of wheel is aimed at the projection of contrary contrary wheel of taking turns with described second, thus in the second edge portion of described glass ribbon, produce contrary impression.
7. method as claimed in claim 6, it is characterized in that, described score line is aimed at the contrary impression of described first edge section and the contrary impression of described second edge portion.
8. method as claimed in claim 7, it is characterized in that, described score line does not extend to the contrary impression of described first edge section and the contrary impression of described second edge portion.
9. method as claimed in claim 6, is characterized in that, the thickness of the described glass ribbon between the contrary impression of described second edge portion is basic identical with the thickness of the described glass ribbon in the centre portions of described glass ribbon.
CN201480028450.XA 2013-05-16 2014-05-13 From the method for continuous glass ribbon separation of glasses sheet Pending CN105228963A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201361824169P 2013-05-16 2013-05-16
US61/824,169 2013-05-16
PCT/US2014/037758 WO2014186307A1 (en) 2013-05-16 2014-05-13 Method of separating a glass sheet from a continuous glass ribbon

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CN105228963A true CN105228963A (en) 2016-01-06

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JP (1) JP2016522148A (en)
KR (1) KR20160009633A (en)
CN (1) CN105228963A (en)
TW (1) TW201446665A (en)
WO (1) WO2014186307A1 (en)

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Publication number Priority date Publication date Assignee Title
WO2015153707A1 (en) * 2014-04-04 2015-10-08 Corning Incorporated Method and system for scoring glass sheet
KR102470880B1 (en) * 2015-04-22 2022-11-25 코닝 인코포레이티드 Glass manufacturing equipment that facilitates the separation of glass ribbons

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CN1484619A (en) * 2001-01-12 2004-03-24 ����ʥ��ಣ���� Method for cutting the edges of a continuous glass ribbon a device for implementing said method and a glass plate cut using said method
CN102471119A (en) * 2009-07-09 2012-05-23 旭硝子株式会社 Plate glass manufacturing device and plate glass manufacturing method
CN103003208A (en) * 2010-07-08 2013-03-27 康宁股份有限公司 Apparatus and method for continuous shaping of a glass ribbon

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EP1710212A1 (en) * 2005-04-06 2006-10-11 Corning Incorporated process and device for manufacturing flat sheets of a glass-based material
KR100889259B1 (en) * 2008-06-22 2009-03-17 (주)디아이그라스 Sheet glass bending system
TWI548598B (en) * 2011-02-28 2016-09-11 康寧公司 Fusion draw apparatus and methods

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CN1484619A (en) * 2001-01-12 2004-03-24 ����ʥ��ಣ���� Method for cutting the edges of a continuous glass ribbon a device for implementing said method and a glass plate cut using said method
US20040060416A1 (en) * 2001-01-12 2004-04-01 Luiz Mauro Lucio Nascimento Method for cutting the edges of a continuous glass ribbon, a device for implementing said method, and a glass plate cut using said method
CN102471119A (en) * 2009-07-09 2012-05-23 旭硝子株式会社 Plate glass manufacturing device and plate glass manufacturing method
CN103003208A (en) * 2010-07-08 2013-03-27 康宁股份有限公司 Apparatus and method for continuous shaping of a glass ribbon

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TW201446665A (en) 2014-12-16
KR20160009633A (en) 2016-01-26
WO2014186307A1 (en) 2014-11-20

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