JPH10291827A - Production of glass pane and apparatus for production therefor - Google Patents
Production of glass pane and apparatus for production thereforInfo
- Publication number
- JPH10291827A JPH10291827A JP11434897A JP11434897A JPH10291827A JP H10291827 A JPH10291827 A JP H10291827A JP 11434897 A JP11434897 A JP 11434897A JP 11434897 A JP11434897 A JP 11434897A JP H10291827 A JPH10291827 A JP H10291827A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- pair
- pulling rollers
- manufacturing
- peripheral speed
- 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
Links
Classifications
-
- 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
- C03B17/068—Means for providing the drawing force, e.g. traction or draw 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
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガラス板の製造方
法及び製造装置に関する。The present invention relates to a method and an apparatus for manufacturing a glass sheet.
【０００２】[0002]
【従来の技術】ガラス板の製造方法は各種知られている
が、溶融ガラスの進行方向の観点から大別すると、引き
上げ法、水平状態で製造する方法、下方に流下させて製
造する方法等に分類できる。2. Description of the Related Art There are various known methods for manufacturing glass sheets. Broadly speaking, from the viewpoint of the direction of movement of molten glass, there are a pulling method, a method of manufacturing in a horizontal state, a method of manufacturing by flowing downward, and the like. Can be classified.
【０００３】このうち、溶融ガラスを下方に流下させ、
ガラス板を垂直下方へ引き抜いてガラス板を製造する方
法として、ダウンドロー法が知られている。[0003] Among them, the molten glass is caused to flow downward,
As a method of manufacturing a glass plate by pulling the glass plate vertically downward, a down-draw method is known.
【０００４】ダウンドロー法としては、例えば、溶融ガ
ラスを断面がくさび状の成形体の表裏面に沿って流下さ
せ成形体の下端部で合流させて板状とし、これを複数組
の一対の引っ張りローラによって、例えば４０ｃｍ／分
の速度で下方に引き抜きつつ冷却して板ガラスを製造す
る方法等（特開平５−１２４８２７号公報等）が実際に
活用されている。In the down-draw method, for example, a molten glass is made to flow down along the front and back surfaces of a molded body having a wedge-shaped cross section and joined at the lower end of the molded body to form a plate. For example, a method of manufacturing a sheet glass by cooling while being drawn downward by a roller at a speed of 40 cm / min (Japanese Patent Laid-Open No. 5-124827) is actually used.
【０００５】なお、ダウンドロー法によって作られる板
ガラスは、他の方法によって作られる板ガラスに比べ薄
いものが得られるので、各種ディスプレイ用ガラス基板
や各種情報記録媒体用ガラス基板として利用されている
が、その成形方法の特性により、板の平坦性はフロート
法などによって作られた板ガラスより悪くなることがあ
る。[0005] Sheet glass made by the down-draw method can be thinner than sheet glass made by other methods, and is therefore used as a glass substrate for various displays and a glass substrate for various information recording media. Due to the characteristics of the forming method, the flatness of the plate may be worse than the plate glass made by the float method or the like.
【０００６】[0006]
【発明が解決しようとする課題】液晶ディスプレイなど
の各種ディスプレイ用ガラス基板には、反りの非常に少
ない高度な反り品質（高い平坦性）が望まれる。成形時
に生じたガラス板の反りは、その後、アニール等の工程
を経ることによってある程度軽減できる場合もあるが、
最終的に反りの非常に少ない高度な反り品質を達成する
ためには、成形の際に可能な限り反りを小さくしておく
必要がある。また、大型の基板であっても反りの非常に
少ない高度な反り品質が望まれる。A glass substrate for various displays such as a liquid crystal display is required to have a high warpage quality (high flatness) with very little warpage. The warpage of the glass sheet generated during molding can be reduced to some extent by subsequent steps such as annealing.
In order to finally achieve high warpage quality with very little warpage, it is necessary to minimize warpage during molding. In addition, even for a large-sized substrate, high warpage quality with very little warpage is desired.
【０００７】本発明は上述した背景の下になされたもの
であり、ガラス板の反りをより小さくできるガラス板の
製造方法及び製造装置の提供を目的とする。The present invention has been made under the above-mentioned background, and an object of the present invention is to provide a method and an apparatus for manufacturing a glass sheet capable of reducing the warpage of the glass sheet.
【０００８】[0008]
【０００９】請求項１記載のガラス板の製造方法は、溶
融ガラスを流下させることにより板状に成形するガラス
板の製造方法において、板状に成形されたガラスに、上
下方向に張力を与えつつ製造することを特徴とする構成
としてある。According to a first aspect of the present invention, there is provided a method for manufacturing a glass sheet, wherein the molten glass is formed into a sheet by flowing down the molten glass. It is characterized by being manufactured.
【００１０】請求項２記載のガラス板の製造方法は、溶
融ガラスを流下させ成形体で板状に成形し、成形された
板状ガラスを一対の引っ張りローラで挟持しつつ下方に
引き抜くガラス板の製造方法において、一対の引っ張り
ローラをガラスの進行方向に複数組配置し、上方に配置
された一対の引っ張りローラの周速度よりも、下方に配
置された一対の引っ張りローラの周速度を大きくしたこ
とを特徴とする構成としてある。According to a second aspect of the present invention, there is provided a method of manufacturing a glass sheet, comprising: flowing molten glass, forming the sheet into a plate shape with a molded body, and pulling the formed sheet glass downward while holding the formed sheet glass between a pair of pulling rollers. In the manufacturing method, a plurality of sets of a pair of pulling rollers are arranged in the traveling direction of the glass, and the peripheral speed of the pair of pulling rollers arranged below is higher than the peripheral speed of the pair of pulling rollers arranged above. The configuration is characterized by the following.
【００１１】請求項３記載の発明は、上記請求項２記載
のガラス板の製造方法において、下方に配置された一対
の引っ張りローラの周速度を、上方に配置された一対の
引っ張りローラの周速度の１００超〜１２０％としたこ
とを特徴とする構成としてある。According to a third aspect of the present invention, in the method for manufacturing a glass sheet according to the second aspect, the peripheral speed of the pair of pulling rollers disposed below is changed to the peripheral speed of the pair of pulling rollers disposed above. Of more than 100 to 120% of the above.
【００１２】請求項４記載の発明は、上記請求項２記載
のガラス板の製造方法において、下方に配置された一対
の引っ張りローラの周速度を、上方に配置された一対の
引っ張りローラの周速度の１０１〜１１０％としたこと
を特徴とする構成としてある。According to a fourth aspect of the present invention, in the method of manufacturing a glass sheet according to the second aspect, the peripheral speed of the pair of pulling rollers disposed below is changed to the peripheral speed of the pair of pulling rollers disposed above. 101 to 110% of the above.
【００１３】請求項５記載の発明は、上記請求項２〜４
記載のガラス板の製造方法において、一対で一組の引っ
張りローラをガラスの進行方向に３組以上配置し、最下
方に配置された一対の引っ張りローラの周速度を、最上
方に配置された一対の引っ張りローラの周速度よりも大
きくし、中間に配置された引っ張りローラの周速度を最
上方と最下方の周速度の中間の値とし、各引っ張りロー
ラの周速度を上方から下方に向かって順次大きくしたこ
とを特徴とする構成としてある。[0013] The invention according to claim 5 is the above-mentioned invention.
In the method for manufacturing a glass sheet described above, three or more pairs of a pair of pulling rollers are arranged in the traveling direction of the glass, and the peripheral speed of the pair of pulling rollers arranged at the lowermost position is set to the pair of the uppermost arranged pair. The peripheral speed of the pulling roller arranged in the middle is set to a value intermediate between the uppermost and lowermost peripheral speeds, and the peripheral speed of each pulling roller is sequentially reduced from the upper side to the lower side. The configuration is characterized by being enlarged.
【００１４】請求項６記載の発明は、上記請求項２〜５
記載のガラス板の製造方法において、一対で一組の引っ
張りローラを、ガラスの進行方向に５組以上配置したこ
とを特徴とする構成としてある。[0014] The invention described in claim 6 is the above-mentioned claims 2-5.
In the method for manufacturing a glass sheet described above, a pair of pulling rollers is arranged in a pair in a direction of movement of the glass, in which at least five sets are arranged.
【００１５】請求項７記載の発明は、上記請求項１〜６
記載のガラス板の製造方法を用いてディスプレイ用ガラ
ス基板を製造することを特徴とする構成としてある。The invention according to claim 7 is the invention according to claims 1 to 6 above.
A glass substrate for a display is manufactured using the method for manufacturing a glass plate described above.
【００１６】請求項８記載の発明は、上記請求項１〜６
記載のガラス板の製造方法を用いて情報記録媒体用ガラ
ス基板を製造することを特徴とする構成としてある。[0016] The invention according to claim 8 provides the above-mentioned claims 1-6.
A glass substrate for an information recording medium is manufactured using the method for manufacturing a glass plate described above.
【００１７】請求項９記載のガラス板の製造装置は、溶
融ガラスを板状に成形する成形体と、この成形体の下方
向に配置され、冷却された板状ガラスを挟持しつつ下方
に引き抜く一対の引っ張りローラと、を備えたガラス板
の製造装置において、一対の引っ張りローラを、ガラス
の進行方向に複数組配置し、かつ、上方に配置された一
対の引っ張りローラの周速度よりも、下方に配置された
一対の引っ張りローラの周速度を大きくする手段を設け
たことを特徴とする構成としてある。According to a ninth aspect of the present invention, there is provided an apparatus for manufacturing a glass sheet, comprising: a molded body for forming a molten glass into a plate-like shape; In a glass sheet manufacturing apparatus provided with a pair of pulling rollers, a plurality of pairs of pulling rollers are arranged in the traveling direction of the glass, and lower than the peripheral speed of the pair of pulling rollers disposed above. And means for increasing the peripheral speed of the pair of pulling rollers arranged in the second position.
【００１８】[0018]
【作用】本発明では、上方に配置された一対の引っ張り
ローラの周速度よりも、下方に配置された一対の引っ張
りローラの周速度を大きくすることで、上下に配置され
た各引っ張りローラの間で、板ガラスの長さ方向に張力
が働きつつ冷却されるため、ガラス板の反りをより小さ
くできる。According to the present invention, the peripheral speed of the pair of pulling rollers arranged below is made larger than the peripheral speed of the pair of pulling rollers arranged above, so that the distance between the pulling rollers arranged vertically can be increased. Thus, the glass sheet is cooled while applying tension in the length direction thereof, so that the warpage of the glass sheet can be further reduced.
【００１９】以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【００２０】本発明のガラス板の製造方法では、まず、
溶融ガラスを流下させ板状に成形する。In the method for producing a glass sheet of the present invention, first,
The molten glass is allowed to flow down and formed into a plate shape.
【００２１】ここで、溶融ガラスを流下させ板状に成形
する方法は、特に制限されず、細部の製造条件も含め公
知の方法を採用できる。Here, the method of flowing the molten glass down and forming it into a plate shape is not particularly limited, and a known method including detailed manufacturing conditions can be adopted.
【００２２】例えば、溶融ガラスを流下させる方法、溶
融ガラスの温度及び粘度等、成形体の使用の有無、成形
体の形状、構造、材質及び温度、各種温度条件等は適宜
選択できる。For example, the method of flowing the molten glass, the temperature and viscosity of the molten glass, the use of the molded body, the shape, structure, material and temperature of the molded body, and various temperature conditions can be appropriately selected.
【００２３】溶融ガラスを流下させる方法としては、例
えば、成形体の頂部に形成したスリットから溶融ガラス
を流出（オーバーフロー）させ成形体の表面に沿って流
下させ成形体の下端部から流下させる方法や、ガラス溶
融槽の底部に設けられたスリットから溶融ガラスを流下
させる方法等が挙げられる。As a method of flowing the molten glass, for example, a method in which the molten glass flows out (overflows) from a slit formed at the top of the molded body, flows down along the surface of the molded body, and flows down from the lower end of the molded body, And a method in which molten glass flows down from a slit provided at the bottom of the glass melting tank.
【００２４】なお、成形体は、板状に流下する溶融ガラ
スの厚さ、幅、均一性等を制御する役割を果たすもので
あればよく、スリットや、厚さや幅等の制御板なども含
まれる。本発明では成形体を使用しない態様も含まれ
る。The formed body may be any as long as it plays a role in controlling the thickness, width, uniformity, etc. of the molten glass flowing down into a plate shape, and includes a slit, a control plate for controlling the thickness, width, etc. It is. The present invention includes an embodiment in which a molded body is not used.
【００２５】溶融ガラスを流下させ成形体で板状に成形
する方法としては、例えば、ダウンドロー法などが挙げ
られる。ここで、ダウンドロー法は、一般的には溶融ガ
ラスを流下させ成形体で成形し、これを垂直下方に引き
抜いてガラス板を製造する方法である。ダウンドロー法
の一例としては、例えば、溶融ガラスを断面がくさび状
の成形体の表裏面に沿って流下させ成形体の下端部で合
流させて板状とし、これを引張りローラで下方に引き抜
きつつ冷却しながらガラス板を製造する方法等が挙げら
れる。As a method of flowing the molten glass down and forming it into a plate shape with a formed body, there is, for example, a down-draw method. Here, the downdraw method is a method of manufacturing a glass plate by flowing molten glass, forming a molded body, and pulling the molded body vertically downward. As an example of the down-draw method, for example, a molten glass flows down along the front and back surfaces of a molded body having a wedge-shaped cross section and is joined at a lower end portion of the molded body to form a plate. A method of producing a glass plate while cooling is used.
【００２６】本発明においては、ガラスの材質、サイ
ズ、厚さ等は特に制限されない。ガラスの材質として
は、例えば、アルミノシリケートガラス、ソーダアルミ
ノケイ酸ガラス、ソーダライムガラス、鉛アルカリガラ
ス、ホウケイ酸ガラス等が挙げられる。In the present invention, the material, size, thickness and the like of the glass are not particularly limited. Examples of the glass material include aluminosilicate glass, sodaaluminosilicate glass, soda lime glass, lead alkali glass, borosilicate glass, and the like.
【００２７】本発明では、上記のようにして成形された
板状ガラスを一対の引っ張りローラで挟持しつつ引き抜
く。この際、一対の引っ張りローラをガラスの進行方向
に複数組配置し、上方に配置された一対の引っ張りロー
ラの周速度よりも、下方に配置された一対の引っ張りロ
ーラの周速度を大きくする。このように、上方に配置さ
れた一対の引っ張りローラの周速度よりも、下方に配置
された一対の引っ張りローラの周速度を大きくすること
で、上下に配置された各引っ張りローラの間で、板ガラ
スの長さ方向に張力が働きつつ冷却されるため、ガラス
板の反りをより小さくできる。In the present invention, the sheet glass formed as described above is pulled out while being held between a pair of pulling rollers. At this time, a plurality of pairs of pulling rollers are arranged in the traveling direction of the glass, and the peripheral speed of the pair of pulling rollers disposed below is set to be higher than the peripheral speed of the pair of pulling rollers disposed above. As described above, by increasing the peripheral speed of the pair of pulling rollers disposed below the peripheral speed of the pair of pulling rollers disposed above, the sheet glass is disposed between the pulling rollers disposed vertically. Since the glass plate is cooled while applying tension in the length direction, the warpage of the glass plate can be further reduced.
【００２８】ローラの間隔は、上記作用及び製品品質等
を考慮し、適宜調整できる。The distance between the rollers can be appropriately adjusted in consideration of the above-described operation, product quality, and the like.
【００２９】溶融ガラスを流下させ成形体で板状に成形
されたガラス板は、成形体を離れた直後から、冷却さ
れ、しだいに固化する。冷却方法としては、放熱による
自然冷却、送風による冷却、冷却ローラーや冷却器など
を用いた冷却方法等が挙げられる。冷却速度や徐冷スケ
ジュール等の冷却条件は適宜制御できる。特に、本発明
では、上下に配置された各引っ張りローラの間で、板ガ
ラスの長さ方向に張力が働きつつ冷却されるようにすべ
く、ローラ間のガラスの温度、冷却速度等を制御するこ
とが好ましい。The glass sheet formed into a plate shape by flowing the molten glass and being formed from the formed body is cooled immediately after leaving the formed body and gradually solidified. Examples of the cooling method include natural cooling by heat radiation, cooling by air blowing, and a cooling method using a cooling roller or a cooler. Cooling conditions such as a cooling rate and a slow cooling schedule can be appropriately controlled. In particular, in the present invention, the temperature of the glass between the rollers, the cooling rate, and the like are controlled so that the tension is exerted in the length direction of the sheet glass between the pulling rollers arranged above and below and the sheet glass is cooled. Is preferred.
【００３０】本発明では、下方に配置された一対の引っ
張りローラの周速度を、上方に配置された一対の引っ張
りローラの周速度の１００超〜１２０％とすることで、
所定の効果が得られる。すなわち、下方のローラの周速
度が上方のローラの周速度の１００％未満であるとガラ
ス板の反りを小さくする効果が少なくなり、逆に１２０
％を超えると板ガラスと引っ張りローラとのスリップが
大きく引っ張り速度も一定になりにくく、また、引っ張
りローラが摩耗しやすくなる傾向がある。In the present invention, the peripheral speed of the pair of pulling rollers disposed below is set to be more than 100 to 120% of the peripheral speed of the pair of pulling rollers disposed above.
A predetermined effect can be obtained. That is, if the peripheral speed of the lower roller is less than 100% of the peripheral speed of the upper roller, the effect of reducing the warpage of the glass plate is reduced.
%, The slip between the sheet glass and the pulling roller is large, and the pulling speed is difficult to be constant, and the pulling roller tends to be easily worn.
【００３１】同様の観点から、下方に配置された一対の
引っ張りローラの周速度を、上方に配置された一対の引
っ張りローラの周速度の１０１〜１１０％とすることが
より好ましい。From the same viewpoint, it is more preferable that the peripheral speed of the pair of pulling rollers disposed below is 101 to 110% of the peripheral speed of the pair of pulling rollers disposed above.
【００３２】本発明では、一対で一組の引っ張りローラ
を上下方向に３組以上配置し、最下方に配置された一対
の引っ張りローラの周速度を、最上方に配置された一対
の引っ張りローラの周速度よりも大きくし、中間に配置
された一対の引っ張りローラの周速度を最上方と最下方
の周速度の中間の値であって上方から下方に向かって順
次大きくした値とすることができる。このように、一対
で一組の引っ張りローラを上下方向に３組以上配置する
ことで、製造工程及び品質（特に反り品質）の安定化等
を図ることができる。In the present invention, three or more pairs of one pair of pulling rollers are arranged in the vertical direction, and the peripheral speed of the pair of pulling rollers disposed at the lowermost position is adjusted to the speed of the pair of pulling rollers disposed at the uppermost position. The peripheral speed of the pair of pulling rollers disposed in the middle can be set to a value intermediate between the uppermost and lowermost peripheral speeds and gradually increased from top to bottom. . As described above, by arranging three or more sets of one pair of pulling rollers in the vertical direction, it is possible to stabilize the manufacturing process and the quality (particularly, the warpage quality).
【００３３】同様に、一対で一組の引っ張りローラを、
上下方向に５組以上配置することもできる。このよう
に、一対で一組の引っ張りローラを上下方向に５組以上
配置すると、各引っ張りローラにかかるガラス重量が減
り、挟持圧力が下げられるため、ガラスが割れにくくな
るとともに、滑落しにくくなるので好ましい。Similarly, a pair of pulling rollers is
Five or more sets can be arranged in the up-down direction. As described above, when five or more pairs of pulling rollers are arranged in the vertical direction, the weight of the glass applied to each pulling roller is reduced, and the holding pressure is reduced. preferable.
【００３４】本発明では、上記本発明方法を用いて製造
された板ガラスを平坦度の高い圧縮板で挟み、加圧しつ
つ加熱、徐冷して板ガラスをさらに平坦化処理すること
もできる。In the present invention, the plate glass produced by the above-mentioned method of the present invention can be sandwiched between compression plates having a high flatness, and heated and gradually cooled while applying pressure to further flatten the plate glass.
【００３５】なお、上記本発明方法を用いて製造された
板ガラス素板は、通常、所定の寸法に加工後、必要に応
じ研磨等を施して各種ガラス基板とされる。The raw glass sheet manufactured by the method of the present invention is usually processed into a predetermined size and then polished if necessary to obtain various glass substrates.
【００３６】本発明方法を用いて製造されたガラス板の
用途は特に制限されないが、例えば、平坦性や薄さ等を
要求される、液晶ディスプレイ、プラズマディスプレイ
などのディスプレイ用ガラス基板や、磁気ディスク、光
磁気ディスク、光ディスクなどの情報記録媒体用ガラス
基板として好適に使用できる。また、各種電子光学用ガ
ラス基板や、電気・電子部品用のガラス基板としても好
適に使用できる。The use of the glass sheet manufactured by the method of the present invention is not particularly limited. For example, a glass substrate for a display such as a liquid crystal display or a plasma display, which requires flatness and thinness, and a magnetic disk It can be suitably used as a glass substrate for an information recording medium such as a magneto-optical disk and an optical disk. Further, it can be suitably used as a glass substrate for various electro-optics and a glass substrate for electric / electronic parts.
【００３７】次に、本発明のガラス板の製造装置につい
て説明する。Next, the apparatus for manufacturing a glass sheet of the present invention will be described.
【００３８】本発明のガラス板の製造装置は、溶融ガラ
スを板状に成形する成形体と、この成形体の下方向に配
置され、冷却された板状ガラスを挟持し引き抜く一対の
引っ張りローラと、を備えたガラス板の製造装置におい
て、一対の引っ張りローラを、ガラスの進行方向に複数
組配置し、かつ、上方に配置された一対の引っ張りロー
ラの周速度よりも、下方に配置された一対の引っ張りロ
ーラの周速度を大きくする手段を採用したことを特徴と
する。この装置によれば、上述した本発明方法を容易に
実現できる。The apparatus for manufacturing a glass sheet according to the present invention comprises a molded body for molding a molten glass into a plate shape, and a pair of pulling rollers disposed below the molded body for sandwiching and drawing the cooled sheet glass. In a glass sheet manufacturing apparatus comprising: a pair of pulling rollers, a plurality of pairs of pulling rollers are disposed in the traveling direction of the glass, and a pair of pulling rollers disposed below the peripheral speed of the pair of pulling rollers disposed above. A means for increasing the peripheral speed of the pulling roller. According to this apparatus, the above-described method of the present invention can be easily realized.
【００３９】本発明装置においてガラスの進行方向に複
数組配置した各引っ張りローラの周速度を制御する手段
としては、各引っ張りローラ毎に個別の駆動手段及び回
転速度の制御手段を設ける方法や、ギヤ、ベルト、各種
変速機構などを用いて駆動及び回転速度の制御を行う方
法などが挙げられる。回転速度の制御は高精度であるこ
とが好ましい。In the apparatus of the present invention, the means for controlling the peripheral speed of each of the plurality of pulling rollers arranged in the traveling direction of the glass includes a method of providing individual driving means and a controlling means of the rotational speed for each pulling roller, and a method of providing a gear. , A method of controlling the driving and the rotation speed using a belt, various speed change mechanisms, and the like. It is preferable that the control of the rotation speed be highly accurate.
【００４０】本発明装置における他の部分については特
に制限されない。例えば、溶融ガラスの供給手段、溶融
ガラスの流下手段、温度制御手段（加熱、冷却手段
等）、ローラの形状、構造、材質等や、成形体の形状、
構造、材質等は適宜選択できる。The other parts of the apparatus of the present invention are not particularly limited. For example, a supply means of molten glass, a flow-down means of molten glass, a temperature control means (heating, cooling means, etc.), a shape, a structure, a material and the like of a roller, a shape of a molded body,
The structure, material and the like can be appropriately selected.
【００４１】本発明では、反りが少なく高い平坦性を有
する薄板ガラスを容易かつ安価に製造できる。また、平
坦性の向上を目的として研磨を行う場合にもその研磨量
を小さくできる。さらに、大型の基板であっても反りの
非常に少ない薄板ガラスを容易かつ安価に得ることがで
きるので、各種ディスプレイ用ガラス基板の製造方法と
して優れる。According to the present invention, a thin glass sheet having little warpage and high flatness can be easily and inexpensively manufactured. Also, when polishing is performed for the purpose of improving flatness, the polishing amount can be reduced. Further, since a thin glass sheet with very little warpage can be obtained easily and inexpensively even for a large-sized substrate, it is excellent as a method for manufacturing various display glass substrates.
【００４２】[0042]
【実施例】以下、実施例にもとづき本発明をさらに具体
的に説明する。EXAMPLES The present invention will be described below more specifically based on examples.
【００４３】実施例１ 図１はダウンドロー方式のガラス板製造装置の縦断面を
概略的に示す図、図２は図１の装置内部を図１のＩ−Ｉ
線の方向から見た正面図である。 Example 1 FIG. 1 is a view schematically showing a longitudinal section of a down-draw type glass sheet manufacturing apparatus, and FIG. 2 is a diagram showing the inside of the apparatus of FIG.
It is the front view seen from the direction of the line.
【００４４】これらの図面において、１は耐火レンガか
らなる炉壁、２は断面がほぼくさび状の成形体である。
図示の成形体２は溶融ガラス３を収容する凹部２ａを有
するいわゆるフィーディングセルと称されるものである
が、他の種類のものを用いても良い。成形体２の凹部２
ａは、図２に示すように溶融ガラス供給管４に接続され
ている。この溶融ガラス供給管４から凹部２ａに溶融ガ
ラスが供給され、凹部２ａの上側のスリット状開口から
溶融ガラスが溢れ、成形体２の両側面に沿って流下し、
成形体２の下端部で合流する。合流した溶融ガラス３は
炉室５内で直ちに冷却されてガラス板３’となり、上下
に間隔を置いて配置された一対の引っ張りローラ６、
６’によって下方に引き抜かれる。In these drawings, reference numeral 1 denotes a furnace wall made of a refractory brick, and 2 denotes a molded body having a substantially wedge-shaped cross section.
The illustrated molded body 2 is a so-called feeding cell having a concave portion 2a for accommodating the molten glass 3, but another type may be used. Concave part 2 of molded body 2
a is connected to the molten glass supply pipe 4 as shown in FIG. The molten glass is supplied from the molten glass supply pipe 4 to the concave portion 2a, and the molten glass overflows from the slit-shaped opening on the upper side of the concave portion 2a and flows down along both side surfaces of the molded body 2,
It joins at the lower end of the molding 2. The merged molten glass 3 is immediately cooled in the furnace chamber 5 to become a glass plate 3 ′, and a pair of pulling rollers 6 arranged at intervals above and below,
It is pulled down by 6 '.
【００４５】本実施例においては、上方に配置された一
対の引っ張りローラ６の周速度は６２ｃｍ／分とし、下
方に配置された一対の引っ張りローラ６’の周速度は６
４ｃｍ／分とした。In the present embodiment, the peripheral speed of the pair of pulling rollers 6 disposed above is set to 62 cm / min, and the peripheral speed of the pair of pulling rollers 6 'disposed below is set to 6 cm / min.
4 cm / min.
【００４６】上記装置を用いて、幅４００ｍｍ、厚さ１
ｍｍのガラス板３’を、成形速度６２ｃｍ／分で引き抜
いて製造したが、上方の引っ張りローラ６と下方の引っ
張りローラ６’との間でガラス板に張力が働いた結果、
縦方向の２５０ｍｍの範囲における反りの最大値は１２
０μｍであった。Using the above apparatus, a width of 400 mm and a thickness of 1
mm glass plate 3 ′ was manufactured by drawing at a molding speed of 62 cm / min, but as a result of tension acting on the glass plate between the upper pulling roller 6 and the lower pulling roller 6 ′,
The maximum value of warpage in the range of 250 mm in the vertical direction is 12
It was 0 μm.
【００４７】比較例１ 比較として、上方に配置された一対の引っ張りローラ６
の周速度を６２ｃｍ／分とし、下方に配置された一対の
引っ張りローラ６’の周速度を同じく６２ｃｍ／分とし
たこと以外は上記実施例１と同様にしてガラス板を製造
したが、縦方向の２５０ｍｍの範囲における反りの最大
値は２８０μｍとなった。COMPARATIVE EXAMPLE 1 For comparison, a pair of pulling rollers 6
A glass plate was manufactured in the same manner as in Example 1 except that the peripheral speed of the pair was set to 62 cm / min, and the peripheral speed of a pair of pulling rollers 6 ′ disposed below was set to 62 cm / min. The maximum value of the warpage in the range of 250 mm was 280 μm.
【００４８】実施例２ 他の実施例として、上下方向に一対の引っ張りローラを
４組設け、それらの周速度を、上方から順にそれぞれ、
６２ｃｍ／分、６３ｃｍ／分、６４ｃｍ／分、６５ｃｍ
／分とした。その他は実施例１と同様とした。 Embodiment 2 As another embodiment, four pairs of pulling rollers are provided in the vertical direction, and their peripheral speeds are set in order from the top.
62cm / min, 63cm / min, 64cm / min, 65cm
/ Min. Others were the same as Example 1.
【００４９】この装置を用いて、幅４００ｍｍ、厚さ１
ｍｍのガラス板３’を、成形速度１．５０ｃｍ／ｓで引
き抜いてガラス板を製造した結果、縦方向の２５０ｍｍ
の範囲における反りの最大値は１１０μｍであった。Using this apparatus, a width of 400 mm and a thickness of 1
mm glass plate 3 'was drawn at a molding speed of 1.50 cm / s to produce a glass plate.
The maximum value of the warpage in the range was 110 μm.
【００５０】実施例３ 実施例１で得られたガラス板を所定の大きさに切断し、
端面を面取りして液晶ディスプレイ用ガラス基板を作製
した。得られた液晶ディスプレイ用ガラス基板は平坦で
あり、また表面が滑らかであるため、基板表面の研磨は
必要なかった。 Example 3 The glass plate obtained in Example 1 was cut into a predetermined size.
The glass substrate for a liquid crystal display was manufactured by chamfering the end face. Since the obtained glass substrate for a liquid crystal display was flat and the surface was smooth, polishing of the substrate surface was not required.
【００５１】以上好ましい実施例をあげて本発明を説明
したが、本発明は必ずしも上記実施例に限定されるもの
ではない。Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above embodiments.
【００５２】例えば、各引っ張りローラの周速度は、ガ
ラス種やその粘度等に応じて適宜調整できる。For example, the peripheral speed of each pulling roller can be appropriately adjusted according to the type of glass and its viscosity.
【００５３】なお、本発明は板状に成形されたガラスの
長さ方向に張力を加えることを特徴とするものであり、
その手段は冷却ローラに限られない。The present invention is characterized in that tension is applied in the longitudinal direction of glass formed into a plate shape.
The means is not limited to the cooling roller.
【００５４】[0054]
【発明の効果】以上説明したように本発明によれば、ガ
ラス板の反りをより小さくできるガラス板の製造方法及
び製造装置を提供できる。As described above, according to the present invention, it is possible to provide a method and an apparatus for manufacturing a glass sheet which can reduce the warpage of the glass sheet.
【００５５】本発明では、反りが少なく高い平坦性を有
する薄板ガラスを容易かつ安価に製造できる。また、反
りを少なくすることでガラス強度の低下を防ぐことがで
きる。さらに、平坦性の向上を目的として研磨を行う場
合その研磨量を小さくできる。According to the present invention, a thin glass sheet having little warpage and high flatness can be easily and inexpensively manufactured. Also, by reducing the warpage, a decrease in the glass strength can be prevented. Furthermore, when polishing is performed for the purpose of improving flatness, the polishing amount can be reduced.
【００５６】また、大型の基板であっても反りの非常に
少ない薄板ガラスを容易かつ安価に得ることができるの
で、各種ディスプレイ用ガラス基板の製造方法として優
れる。Further, since a thin glass sheet with very little warpage can be obtained easily and inexpensively even for a large-sized substrate, it is excellent as a method for manufacturing various display glass substrates.
【図１】ダウンドロー方式のガラス板製造装置の縦断面
を概略的に示す図である。FIG. 1 is a view schematically showing a longitudinal section of a down-draw type glass sheet manufacturing apparatus.
【図２】図１の装置内部を図１のＩ−Ｉ線の方向から見
た正面図である。FIG. 2 is a front view of the inside of the apparatus of FIG. 1 as viewed from the direction of line II in FIG. 1;
１ 炉壁 ２ 成形体 ２ａ 凹部 ３ 溶融ガラス ４ 溶融ガラス供給管 ５ 炉室 ６、６’一対の引っ張りローラ DESCRIPTION OF SYMBOLS 1 Furnace wall 2 Molded body 2a Depression 3 Molten glass 4 Molten glass supply pipe 5 Furnace chamber 6, 6 'A pair of pulling rollers
───────────────────────────────────────────────────── フロントページの続き (72)発明者 遠藤 栄昭 東京都新宿区中落合２丁目７番５号 ホー ヤ株式会社内 (72)発明者 星野 和彦 大阪府大阪市中央区道修町３丁目５番11号 日本板硝子株式会社内 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hideaki Endo 2-7-5 Nakaochiai, Shinjuku-ku, Tokyo Inside Hoya Co., Ltd. (72) Inventor Kazuhiko Hoshino 3-5-2 Doshumachi, Chuo-ku, Osaka-shi, Osaka No. 11 Nippon Sheet Glass Co., Ltd.
Claims (9)
に成形するガラス板の製造方法において、 板状に成形されたガラスに、上下方向に張力を与えつつ
製造することを特徴とするガラス板の製造方法。1. A method for manufacturing a glass sheet, which is formed into a sheet by flowing down molten glass, wherein the glass sheet is manufactured while applying a vertical tension to the glass formed. Production method.
形し、成形された板状ガラスを一対の引っ張りローラで
挟持しつつ下方に引き抜くガラス板の製造方法におい
て、 一対の引っ張りローラをガラスの進行方向に複数組配置
し、上方に配置された一対の引っ張りローラの周速度よ
りも、下方に配置された一対の引っ張りローラの周速度
を大きくしたことを特徴とするガラス板の製造方法。2. A method of manufacturing a glass sheet, in which a molten glass is caused to flow down and formed into a plate shape with a formed body, and the formed plate-shaped glass is pulled downward while being sandwiched between a pair of pulling rollers. A plurality of sets are arranged in the traveling direction of the glass sheet, and a peripheral speed of a pair of pulling rollers disposed below is set higher than a peripheral speed of a pair of pulling rollers disposed above.
いて、下方に配置された一対の引っ張りローラの周速度
を、上方に配置された一対の引っ張りローラの周速度の
１００超〜１２０％としたことを特徴とするガラス板の
製造方法。3. The method for manufacturing a glass sheet according to claim 2, wherein the peripheral speed of the pair of pulling rollers disposed below is set to more than 100% to 120% of the peripheral speed of the pair of pulling rollers disposed above. A method for manufacturing a glass sheet, characterized by:
いて、下方に配置された一対の引っ張りローラの周速度
を、上方に配置された一対の引っ張りローラの周速度の
１０１〜１１０％としたことを特徴とするガラス板の製
造方法。4. The method for manufacturing a glass sheet according to claim 2, wherein the peripheral speed of the pair of pulling rollers disposed below is set to 101 to 110% of the peripheral speed of the pair of pulling rollers disposed above. A method for producing a glass plate, characterized by comprising:
において、一対で一組の引っ張りローラをガラスの進行
方向に３組以上配置し、最下方に配置された一対の引っ
張りローラの周速度を、最上方に配置された一対の引っ
張りローラの周速度よりも大きくし、中間に配置された
引っ張りローラの周速度を最上方と最下方の周速度の中
間の値とし、各引っ張りローラの周速度を上方から下方
に向かって順次大きくしたことを特徴とするガラス板の
製造方法。5. The method for manufacturing a glass sheet according to claim 2, wherein a pair of pulling rollers are arranged in a pair in the traveling direction of the glass at least three pairs, and a pair of pulling rollers disposed at a lowermost position are arranged around the pair of pulling rollers. The speed is set to be higher than the peripheral speed of the pair of pulling rollers arranged at the uppermost position, and the peripheral speed of the pulling roller disposed at the middle is set to a value intermediate between the uppermost and lowermost peripheral speeds. A method for manufacturing a glass sheet, wherein the peripheral speed is sequentially increased from top to bottom.
において、一対で一組の引っ張りローラを、ガラスの進
行方向に５組以上配置したことを特徴とするガラス板の
製造方法。6. The method for manufacturing a glass sheet according to claim 2, wherein five or more sets of one pair of pulling rollers are arranged in the traveling direction of the glass.
を用いてディスプレイ用ガラス基板を製造することを特
徴とするディスプレイ用ガラス基板の製造方法。7. A method for manufacturing a glass substrate for a display, wherein the method for manufacturing a glass plate according to claim 1 is used to manufacture a glass substrate for a display.
を用いて情報記録媒体用ガラス基板を製造することを特
徴とする情報記録媒体用ガラス基板の製造方法。8. A method for producing a glass substrate for an information recording medium, comprising producing a glass substrate for an information recording medium using the method for producing a glass plate according to claim 1.
を挟持しつつ下方に引き抜く一対の引っ張りローラと、
を備えたガラス板の製造装置において、 一対の引っ張りローラを、ガラスの進行方向に複数組配
置し、かつ、上方に配置された一対の引っ張りローラの
周速度よりも、下方に配置された一対の引っ張りローラ
の周速度を大きくする手段を設けたことを特徴とするガ
ラス板の製造装置。9. A molded body for molding a molten glass into a plate shape, and a pair of pulling rollers arranged below the molded body and pulling down while holding the cooled plate glass,
In a glass sheet manufacturing apparatus comprising: a pair of pulling rollers, a plurality of pairs of pulling rollers are arranged in the traveling direction of the glass, and a pair of pulling rollers disposed below the peripheral speed of the pair of pulling rollers disposed above. An apparatus for manufacturing a glass sheet, comprising means for increasing the peripheral speed of a pulling roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11434897A JPH10291827A (en) | 1997-04-16 | 1997-04-16 | Production of glass pane and apparatus for production therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11434897A JPH10291827A (en) | 1997-04-16 | 1997-04-16 | Production of glass pane and apparatus for production therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10291827A true JPH10291827A (en) | 1998-11-04 |
Family
ID=14635515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11434897A Pending JPH10291827A (en) | 1997-04-16 | 1997-04-16 | Production of glass pane and apparatus for production therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10291827A (en) |
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-
1997
- 1997-04-16 JP JP11434897A patent/JPH10291827A/en active Pending
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