WO2012137616A1 - 薄板ガラス製造装置 - Google Patents

薄板ガラス製造装置 Download PDF

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Publication number
WO2012137616A1
WO2012137616A1 PCT/JP2012/057683 JP2012057683W WO2012137616A1 WO 2012137616 A1 WO2012137616 A1 WO 2012137616A1 JP 2012057683 W JP2012057683 W JP 2012057683W WO 2012137616 A1 WO2012137616 A1 WO 2012137616A1
Authority
WO
WIPO (PCT)
Prior art keywords
molded body
molten glass
width direction
manufacturing apparatus
thin glass
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.)
Ceased
Application number
PCT/JP2012/057683
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
加埜　智典
徳作 西浦
孝喜 上田
隆英 中村
大輔 永田
英孝 織田
裕史 岩間
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.)
Nippon Electric Glass Co Ltd
Original Assignee
Nippon Electric Glass Co Ltd
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 Nippon Electric Glass Co Ltd filed Critical Nippon Electric Glass Co Ltd
Priority to KR1020137025475A priority Critical patent/KR101860736B1/ko
Priority to CN201280004756.2A priority patent/CN103313945B/zh
Publication of WO2012137616A1 publication Critical patent/WO2012137616A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B18/00—Shaping glass in contact with the surface of a liquid
    • C03B18/02—Forming sheets
    • C03B18/04—Changing or regulating the dimensions of the molten glass ribbon
    • C03B18/06—Changing or regulating the dimensions of the molten glass ribbon using mechanical means, e.g. restrictor bars, edge rollers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
    • C03B17/06—Forming glass sheets
    • C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor

Definitions

  • the present invention relates to an improvement in thin glass manufacturing technology by the overflow downdraw method.
  • thin glass used in various fields such as liquid crystal displays, plasma displays, organic EL displays and other flat panel display (FPD) glass substrates, is free from surface defects and waviness. In fact, strict product quality is required.
  • FPD flat panel display
  • molten glass G is poured into the overflow groove 4 at the top of the molded body 1, and the molten glass G overflowing from both sides of the overflow groove 4 is outside the substantially wedge-shaped molded body 1. While flowing down along the surface portion 5 (having the vertical surface portion 5a and the inclined surface portion 5b), it is integrated and integrated at the lower end portion 5c of the molded body 1, and one sheet of thin glass is continuously formed.
  • the feature of this manufacturing method is that both the front and back surfaces of the formed thin glass are molded without contacting any part of the molded body 1 in the molding process. It is in the point which becomes the fire-making side without.
  • the molded object 1 used for this manufacturing method has the control wall part 3b which regulates the breadth of the width direction of the molten glass G which flows down along the outer side surface part 5 of the molded object main body 2, for example.
  • the control wall part 3b which regulates the breadth of the width direction of the molten glass G which flows down along the outer side surface part 5 of the molded object main body 2, for example.
  • both ends in the width direction of the molten glass G overflowing from the overflow groove 4 are guided downward along the regulating wall 3b when reaching the outer surface 5 of the molded body 2.
  • the regulation wall 3 b is generally formed by externally fitting a pair of covering members 3 (specifically, fitting recesses 3 a) at both ends in the width direction of the molded body 2. Is.
  • the end surface of the covering member 3 that is externally fitted to both ends in the width direction of the molded body 2 serves as the regulation wall 3b.
  • the molten glass G overflowing from the overflow groove 4 extends along the regulation wall portion 3 b.
  • the molded body 2 and the covering member 3 may enter.
  • both the molded body 2 and the covering member 3 become high temperature in the process of forming the thin glass, and a gap due to the difference in thermal expansion is inevitably generated between the two and 3. .
  • molten glass hereinafter referred to as a shunted molten glass
  • Gx that has entered the gap between the molded body 2 and the covering member 3 from the direction B in FIG. 7 passes through the gap, and the lower end of the molded body 2. In the part 5c, it flows out outside along the regulation wall part 3b.
  • the molten glass (hereinafter referred to as mainstream molten glass) Ga flowing down normally along the outer surface portion 5 of the molded body 2 is the lower end of the molded body 2 as shown by an arrow A in FIG.
  • mainstream molten glass Ga and the divided molten glass Gx do not merge at the lower end of the molded body 2, and the divided molten glass Gx flows down from the lower end 5 c of the molded body 2 alone in a streak shape.
  • the shunted molten glass Gx forms a bowl-shaped lump at a position immediately below the lower end portion 5c of the molded body 2 with the passage of time, and drops as a bowl-shaped glass Gx1 when it reaches a certain size. To do. And when the bowl-shaped glass Gx1 falls in this way, it has various bad influences on the shaping
  • the present invention ensures that when a thin glass is formed by the overflow down draw method, the shunt glass that has been separated from the mainstream molten glass causes a problem such as breakage in the thin glass that is formed. It is a technical problem to prevent it.
  • the present invention was devised to solve the above problems, and has an overflow groove at the top, and the molten glass overflowing on both sides from the overflow groove is fused and integrated at the lower end while flowing down along the substantially wedge-shaped outer surface.
  • the width of the molten glass that is externally fitted to each of the widthwise ends of the molded body and the molten glass that flows down along the outer surface of the molded body is regulated.
  • a thin glass manufacturing apparatus having a molded body provided with a pair of covering members forming a regulating wall portion, a lower region including a lower end portion of the molded body main body in each of the regulating wall portions of the pair of covering members And extending from the lower side to the central portion in the width direction, and extending the tip of the extended portion toward the flow area of the mainstream molten glass that normally flows along the outer surface of the molded body.
  • the shunt glass that has entered the gap between the covering member and the molded body main body is guided to the center in the width direction by the extending portion.
  • the mainstream molten glass flowing down along the outer surface of the molded body can be merged. Therefore, it is possible to reliably prevent the situation where the shunt glass due to the shunted molten glass is formed without the shunted molten glass flowing down from the lower end of the molded body alone.
  • the extending portion extends so as to gradually approach the width direction center side from the width direction end portion as it moves to the lower end portion of the molded body.
  • the shape of the extending portion changes so as to follow the shrinkage in the width direction of the mainstream molten glass, so the resistance that the extending portion gives to the flow of the mainstream molten glass can be reduced.
  • the extension portion may be formed of a thin member along the outer surface portion of the molded body, and mainstream molten glass may be able to ride on the surface.
  • the extending portion has irregularities on the surface.
  • the shrinkage in the width direction of the mainstream molten glass can be more reliably suppressed by the unevenness of the surface of the extending portion.
  • the surface of the extension part may be smooth.
  • the extending portion may be formed of a thick member that can regulate the spread in the width direction of the mainstream molten glass at the tip portion.
  • the tip of the extending portion functions as a regulating wall portion that regulates the spread in the width direction of the mainstream molten glass. For this reason, it is possible to reliably join the shunted molten glass flowing out from the front end of the extending portion to the mainstream molten glass while restricting the spread in the width direction of the mainstream molten glass by the extending portion.
  • the extension part may be configured to have a flange part that stands upright substantially perpendicular to the surface of the molded body body at the tip part. If it does in this way, even if it is a case where an extension part is comprised with a thin member, the effect similar to the case where it comprises with a thick member as mentioned above can be acquired.
  • the extending portion may be formed of a metal having heat resistance and corrosion resistance, an alloy thereof, or a composite material thereof.
  • the maximum extension amount of the extension portion in the width direction is 10 to 200 mm.
  • the maximum extension amount in the width direction of the extension portion is in the above numerical range.
  • the extension start position in the height direction of the extension part is separated upward by 30 mm or more along the outer side surface part of the molded body body from the lower end part of the molded body body.
  • the extending portion can be reliably positioned at the contraction start position in the width direction of the mainstream molten glass.
  • the shunted molten glass that has entered the gap between the covering member and the molded body main body is brought to the center in the width direction by the extending portion. It can be guided and merged with the mainstream molten glass flowing down along the outer surface portion of the molded body. Therefore, it is possible to reliably prevent a situation in which the shunt glass is formed by the shunted glass flowing down from the lower end of the molded body alone. Therefore, it is possible to reliably prevent problems such as breakage in the thin glass sheet to be formed by the shunted molten glass separated from the mainstream molten glass.
  • FIG. 1 is a front view showing a main part of a thin glass manufacturing apparatus according to the first embodiment of the present invention.
  • This thin glass manufacturing apparatus includes a molded body 1 for executing the overflow downdraw method.
  • the molded body 1 includes a molded body main body 2 and a pair of covering members 3 that are externally fitted to both ends in the width direction of the molded body main body 2.
  • the molded body 2 is long along the direction corresponding to the width direction of the thin glass to be produced, and the overflow groove 4 formed along the longitudinal direction at the top and the wedge body downward toward each other. A pair of outer surface portions 5 gradually approaching each other.
  • the molten glass G is poured into the overflow groove 4 formed at the top of the molded body 2, and the molten glass G out of the molten glass G overflowing on both sides forms a substantially wedge shape of the molded body 2. It flows down along both outer surface portions 5.
  • the mainstream molten glass Ga flowing down along the both outer side surface portions 5 of the molded body 2 is fused and integrated at a portion called a route at the lower end of the molded body 2, and a single sheet glass is formed from the mainstream molten glass Ga.
  • Both ends in the width direction of the fused and integrated mainstream molten glass Ga are sent downward while being sandwiched from the front and back sides by a pulling roller (not shown) or the like below the molded body 1.
  • the outer surface 5 of the molded body 2 is configured by vertically connecting a vertical surface 5a and an inclined surface 5b, and the intersection of the inclined surfaces 5b is the lower end of the molded body 2 referred to as the above-mentioned route.
  • Part 5c is configured.
  • the covering member 3 has fitting recesses 3a that are fitted on both ends in the width direction of the molded body 2 (see FIG. 5 for details).
  • the covering member 3 covers both ends in the width direction of the molded body 2 in a state in which the fitting recess 3 a is fitted to the molded body 2, and extends along the outer surface 5 of the molded body 2.
  • a regulating wall portion 3b that regulates the spread in the width direction of the molten glass G flowing down is formed.
  • the regulation wall 3b has a thickness of 1 to 10 mm, for example.
  • the regulating wall 3b of the covering member 3 extends toward the center in the width direction while covering the lower region including the lower end 5c of the molded body 2 from below.
  • An extending portion 6 is provided.
  • tip part of this extension part 6 is orient
  • tip part of the extension part 6 has overlapped with the flowing-down area of the mainstream molten glass Ga.
  • the overlapping part of the extension part 6 with the flow-down area of the mainstream molten glass Ga may be formed at least at the lower end part 5 c of the molded body 2.
  • the extending portion 6 is a thin member (in a range thinner than the regulating wall portion 3 b of the covering member 3) along the outer surface portion 5 of the molded body 2. (For example, a thickness of 0.5 to 3 mm) and extends so as to gradually approach from the width direction end portion to the width direction center side as moving to the lower end portion of the molded body 2.
  • the distal end portion of the extending portion 6 is inclined so that the lower side of the distal end portion of the extending portion 6 is located closer to the center in the width direction than the upper side. Therefore, the mainstream molten glass Ga rides on the surface of the extension portion 6. That is, a part of the surface of the extension part 6 constitutes a part of the flowing-down area of the mainstream molten glass Ga.
  • both are caused by the difference in thermal expansion between the covering member 3 and the molded body 2.
  • the diverted molten glass Gx that has entered the gap formed between 2 and 3 from the direction of arrow B in the figure can be guided to the center in the width direction by the extending portion 6 and can be reliably joined to the mainstream molten glass Ga. . Therefore, the situation where the shunt glass (see FIG. 7) due to the shunted molten glass Gx is formed without the shunted molten glass Gx flowing down from the lower end of the molded body 2 alone is reliably prevented. be able to. Therefore, it is possible to reliably prevent a fatal problem that the thin glass sheet to be molded is contaminated or broken by the split-flow molten glass Gx separated from the mainstream molten glass Ga, and maintain stable production of the thin glass. can do.
  • the surface of the extending portion 6 on which the mainstream molten glass Ga rides has irregularities.
  • the surface of the extending portion 6 is in a surface state in which, for example, concave portions or convex portions having a diameter of 1 to 2 mm and a depth or protruding height of 1 to 2 mm are scattered at intervals of 2 to 3 mm.
  • the extending portion 6 is formed of a metal having heat resistance and corrosion resistance, an alloy thereof, or a composite material thereof. Specifically, for example, it is formed of platinum, a platinum alloy, a ceramic dispersed composite material, or the like.
  • the maximum dimension L1 in the width direction of the extending portion 6 is preferably 10 to 200 mm, more preferably 20 to 180 mm, and most preferably 30 to 160 mm.
  • the maximum dimension L2 in the height direction of the extending portion 6 is preferably 30 mm or more, more preferably 30 mm or more and 400 mm or less, and most preferably 30 mm or more and 200 mm or less.
  • molten glass G is supplied into an overflow groove 4 from a supply pipe (not shown), and the molten glass G overflows from the overflow groove 4 to both sides of the molded body 2.
  • the mainstream molten glass Ga flows down along the outer side surface portions 5 while being restricted in the width direction by the restriction wall portion 3 b of the covering member 3. Then, they are fused and integrated at the lower end of the molded body 2.
  • a split molten glass Gx that separates from the mainstream molten glass Ga and enters the gap between the molded body 2 and the covering member 3 is generated. This split molten glass Gx is the lower end of the molded body 2.
  • FIG. 3 is a front view showing a main part of the thin glass manufacturing apparatus according to the second embodiment of the present invention.
  • the thin glass manufacturing apparatus according to the second embodiment is different from the thin glass manufacturing apparatus according to the first embodiment in the structure of the extending portion 6 provided in the covering member 3.
  • the extending portion 6 is formed of a thick member that can regulate the spread in the width direction of the mainstream molten glass Ga at the tip edge 6a. If it does in this way, the front-end
  • the preferable range of the maximum dimension L1 in the width direction of the extending part 6 and the maximum dimension L2 in the height direction of the extending part 6 is the same as in the first embodiment.
  • this invention is not limited to the said embodiment, It can implement with a various form.
  • the case where the extending portion 6 covers the inclined surface portion 5b of the outer surface portion 5 of the molded body 5 has been illustrated and described.
  • the extending portion 6 is perpendicular to the inclined surface 5b of the outer surface portion 5. Up to the surface portion 5a may be continuously covered.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Glass Compositions (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
PCT/JP2012/057683 2011-04-01 2012-03-26 薄板ガラス製造装置 Ceased WO2012137616A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020137025475A KR101860736B1 (ko) 2011-04-01 2012-03-26 박판 글라스 제조 장치
CN201280004756.2A CN103313945B (zh) 2011-04-01 2012-03-26 薄板玻璃制造装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-081961 2011-04-01
JP2011081961A JP5724552B2 (ja) 2011-04-01 2011-04-01 薄板ガラス製造装置

Publications (1)

Publication Number Publication Date
WO2012137616A1 true WO2012137616A1 (ja) 2012-10-11

Family

ID=46969017

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PCT/JP2012/057683 Ceased WO2012137616A1 (ja) 2011-04-01 2012-03-26 薄板ガラス製造装置

Country Status (6)

Country Link
US (1) US8726695B2 (enExample)
JP (1) JP5724552B2 (enExample)
KR (1) KR101860736B1 (enExample)
CN (1) CN103313945B (enExample)
TW (1) TWI519490B (enExample)
WO (1) WO2012137616A1 (enExample)

Cited By (1)

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KR20140118848A (ko) 2013-03-29 2014-10-08 아반스트레이트 가부시키가이샤 유리판의 제조 방법

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CN104428260B (zh) * 2012-08-24 2017-02-15 日本电气硝子株式会社 板玻璃制造装置及板玻璃制造方法
US20150353408A1 (en) 2013-04-01 2015-12-10 Nippon Electric Glass Co., Ltd. Sheet glass forming method and sheet glass forming device
TWI656022B (zh) * 2013-11-13 2019-04-11 美商康寧公司 疊層玻璃物件及其製造方法
KR102377994B1 (ko) * 2014-09-30 2022-03-23 코닝 인코포레이티드 유리 리본을 형성하는, 압축 말단에서 커브를 갖는 아이소파이프 및 방법
WO2016057368A1 (en) * 2014-10-06 2016-04-14 Corning Incorporated Method of modifying a flow of molten glass and apparatus therefor
CN106795033B (zh) * 2014-10-07 2020-02-07 肖特股份有限公司 具有提高的强度的玻璃层压材料
EP3377453A1 (en) * 2015-11-20 2018-09-26 Corning Incorporated Laminated glass ribbons and apparatuses for forming laminated glass ribbons
JP2018535916A (ja) * 2015-11-20 2018-12-06 コーニング インコーポレイテッド ガラスリボン形成装置および方法
US9840431B2 (en) * 2016-01-11 2017-12-12 Corning Incorporated Methods and apparatuses for supporting forming bodies of glass forming apparatuses
JP7148547B2 (ja) * 2017-04-28 2022-10-05 コーニング インコーポレイテッド 内部加熱装置を備えたエッジディレクタ
WO2019104039A2 (en) * 2017-11-22 2019-05-31 Corning Incorporated Apparatuses including edge directors for forming glass ribbons
JP7488509B2 (ja) * 2020-06-18 2024-05-22 日本電気硝子株式会社 ガラス物品の製造装置及びその製造方法
JP7488510B2 (ja) * 2020-06-18 2024-05-22 日本電気硝子株式会社 ガラス物品の製造装置及びその製造方法
JP7495662B2 (ja) 2020-07-16 2024-06-05 日本電気硝子株式会社 ガラス物品の製造方法

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Publication number Priority date Publication date Assignee Title
KR20140118848A (ko) 2013-03-29 2014-10-08 아반스트레이트 가부시키가이샤 유리판의 제조 방법

Also Published As

Publication number Publication date
TW201247562A (en) 2012-12-01
JP5724552B2 (ja) 2015-05-27
KR20140015411A (ko) 2014-02-06
CN103313945B (zh) 2015-12-23
KR101860736B1 (ko) 2018-05-24
TWI519490B (zh) 2016-02-01
US8726695B2 (en) 2014-05-20
CN103313945A (zh) 2013-09-18
US20120272688A1 (en) 2012-11-01
JP2012214349A (ja) 2012-11-08

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