JP3468251B2 - Method and apparatus for manufacturing thin glass plate - Google Patents
Method and apparatus for manufacturing thin glass plateInfo
- Publication number
- JP3468251B2 JP3468251B2 JP32744494A JP32744494A JP3468251B2 JP 3468251 B2 JP3468251 B2 JP 3468251B2 JP 32744494 A JP32744494 A JP 32744494A JP 32744494 A JP32744494 A JP 32744494A JP 3468251 B2 JP3468251 B2 JP 3468251B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- plate
- base plate
- thin plate
- width direction
- 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.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/037—Re-forming glass sheets by drawing
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、元板ガラスをリドロー
（ガラス板再成形法）してガラス薄板を製造するガラス
薄板の製造方法及び装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a glass sheet by redrawing a glass sheet (glass reforming method).
【０００２】[0002]
【従来の技術】従来、液晶等のディスプレイ装置に用い
られる１．１ｍｍ以下のガラス薄板は、例えばリドロー
法によって製造されており、このリドロー法は、厚肉
（例えば厚さ５ｍｍ）の元板ガラスを軟化温度以上に加
熱し、これを引き延ばして断面を薄く（例えば厚さ０．
７ｍｍ）再成形するものである。かかるリドロー法に用
いるガラス薄板の製造装置は、例えば図４、図５に示す
ように、元板供給部ａ、加熱部ｂ及び板引部ｃを縦列に
配置して成り、元板供給部ａ及び板引部ｃに設けたそれ
ぞれの駆動装置を制御して任意の板引条件が得られるよ
うにしてある。2. Description of the Related Art Conventionally, a glass thin plate of 1.1 mm or less used for a display device such as a liquid crystal is manufactured by, for example, a redrawing method. In this redrawing method, a thick (for example, 5 mm thick) original glass plate is used. It is heated to a softening temperature or higher, and this is stretched to make the cross-section thin (for example, thickness 0.
7 mm) to be reshaped. An apparatus for manufacturing a thin glass plate used in such a redrawing method is, for example, as shown in FIGS. 4 and 5, configured by arranging a base plate supply section a, a heating section b, and a plate drawing section c in a column. Also, the respective driving devices provided in the plate drawing section c are controlled so that an arbitrary plate drawing condition can be obtained.
【０００３】ガラス元板Ｇを下方へ送る元板供給部ａ
は、マシンベース１とマシンヘッド２を支柱３により所
定間隔に結合・固定し機枠を構成している。この支柱３
に沿ってマシンベース１とマシンヘッド２との間に第１
スライド台４を螺合したボールネジ５を挿通する。ボー
ルネジ５の上端はマシンヘッド２の軸受７を貫通・突出
し、下端の歯車８に駆動モータ９の歯車１０を係合す
る。上記駆動モータ９の回転方向を切り換えることによ
って、ボールネジ５に螺合した第１スライド台４は、支
柱３に沿って所定速度で昇降運動する。A base plate supply section a for feeding a glass base plate G downward
The machine base 1 and the machine head 2 are connected and fixed to each other at predetermined intervals by the columns 3 to form a machine frame. This prop 3
Along the first between the machine base 1 and the machine head 2
The ball screw 5 with which the slide base 4 is screwed is inserted. The upper end of the ball screw 5 penetrates and projects through the bearing 7 of the machine head 2, and the gear 8 of the lower end engages the gear 10 of the drive motor 9. By switching the rotation direction of the drive motor 9, the first slide base 4 screwed into the ball screw 5 moves up and down along the support column 3 at a predetermined speed.
【０００４】上記スライド台４は、ガラス元板Ｇの上端
を把持する第１チャック１３を一体に設けたチャックア
ーム１４を開閉するエアシリンダ１５を有する。The slide table 4 has an air cylinder 15 for opening and closing a chuck arm 14 integrally provided with a first chuck 13 for holding the upper end of the glass base plate G.
【０００５】またこの装置ｂは、第２スライド台２０及
び第３スライド台３０を有しており、これらのスライド
台２０、３０は第１スライド台４と同様な駆動装置で駆
動されるボールネジ２３、２３ａに螺合して支柱３に沿
って昇降可能とされ、各スライド台２０、３０には、ガ
ラス元板Ｇの両側端を把持する一対の第２チャック２
１、２２と一対の第３チャック３１、３２を有する移動
台２４、２５、３５、３６がエアシリンダ２６、２７、
３７、３８によってガラス元板Ｇの両側方に接近隔離移
動可能に設けられ、第２チャック２１、２２及び第３チ
ャック３１、３２はエアシリンダ２８、２９、３９、４
０で開閉作動可能とされている。上記移動台２４、２
５、３５、３６は、省略して第２チャック２１、２２及
び第３チャック３１、３２をスライド台２０、３０に直
接取り付けるようにしても良い。第３スライド台３０に
は、ガラス元板Ｇの端縁を加熱する溶着バーナ３３が一
体に固定してある。This device b also has a second slide base 20 and a third slide base 30, and these slide bases 20 and 30 are ball screws 23 driven by the same drive device as the first slide base 4. , 23a that can be screwed up and down along the support column 3, and each slide table 20, 30 has a pair of second chucks 2 that hold both side edges of the glass base plate G.
The moving tables 24, 25, 35 and 36 having the first and the second chucks 32 and the pair of the third chucks 31 and 32 are the air cylinders 26 and 27, respectively.
The second and third chucks 21 and 22 and the third chucks 31 and 32 are provided on both sides of the glass base plate G by 37 and 38 so as to be able to approach and separate from each other.
It is possible to open and close at 0. The moving table 24, 2
5, 35 and 36 may be omitted and the second chucks 21, 22 and the third chucks 31, 32 may be directly attached to the slide bases 20, 30. A welding burner 33 for heating the edge of the glass base plate G is integrally fixed to the third slide base 30.
【０００６】加熱部ｂは、第３スライド台３０の下方の
マシンベース１に設置され、中央にガラス元板Ｇの貫通
するスリットを有し、かつ、該スリットを通過するガラ
ス元板Ｇの両面に相対するように加熱素子が配置してあ
って、元板供給部ａから送られてくるガラス元板Ｇを下
部から上部に向かって順次加熱軟化せしめるものであ
る。The heating part b is installed on the machine base 1 below the third slide table 30, has a slit through which the glass base plate G penetrates, and both sides of the glass base plate G passing through the slit. The heating element is disposed so as to face the glass plate, and the glass base plate G sent from the base plate supply section a is sequentially heated and softened from the lower part to the upper part.
【０００７】上記加熱部ｂの下部に軟化したガラス元板
Ｇを強制的に引っ張るローラ機構を有する板引部ｃを縦
列に配置してある。Below the heating part b, plate-drawing parts c having a roller mechanism for forcibly pulling the softened glass base plate G are arranged in tandem.
【０００８】加熱部ｂは、図４、図５、図６（イ）及び
（ロ）に示すように、成形炉４１及び徐冷炉４２から成
り、マシンベース１に固定し、第３チャック３２の真下
の定位置に設置され、かつ垂下するガラス元板Ｇの貫通
するスリット４３を中央に設けている。As shown in FIGS. 4, 5, 6 (a) and 6 (b), the heating section b is composed of a forming furnace 41 and a slow cooling furnace 42, which is fixed to the machine base 1 and directly below the third chuck 32. A slit 43 that is installed at a fixed position and that penetrates the depending glass base plate G is provided in the center.
【０００９】また、加熱部ｂには、スリット４３を通過
するガラス元板Ｇに相対する位置に加熱素子を設けてい
る。即ち、第一の熱源として板幅方向に棒状に延びる電
気ヒータ４４は、成形炉４１の高さ方向に沿って複数本
設けられ、これら各棒状電気ヒータ４４の調整により成
形炉４１の高さ方向の温度分布を制御し得るようになっ
ている。また、第二の熱源として成形炉４１の高さ方向
に延びる縦型の電気ヒータ４５は、板幅方向に沿って複
数本配置され、これら各縦型の電気ヒータ４５の調整に
より成形炉４１の幅方向の温度分布を制御し得るように
なっている。Further, the heating part b is provided with a heating element at a position facing the glass base plate G passing through the slit 43. That is, as the first heat source, a plurality of electric heaters 44 extending in a bar shape in the plate width direction are provided along the height direction of the forming furnace 41, and the height direction of the forming furnace 41 is adjusted by adjusting each of the rod-shaped electric heaters 44. The temperature distribution can be controlled. Further, as the second heat source, a plurality of vertical electric heaters 45 extending in the height direction of the forming furnace 41 are arranged along the plate width direction. The temperature distribution in the width direction can be controlled.
【００１０】また、徐冷炉４２は、成形の完了したガラ
ス薄板Ｇ´の残留歪を除去するものであり、加熱素子を
適宜内設している。The slow cooling furnace 42 removes the residual strain of the glass thin plate G'which has been molded, and has a heating element appropriately installed therein.
【００１１】加熱部ｂの下方にガラス薄板Ｇ´の引張り
機構を有する板引部ｃを縦列に配置している。この引張
り機構については、図示を省略するが、引張り機構はガ
ラス薄板Ｇ´をローラとローラの間に挟み込み、ガラス
元板Ｇの供給速度よりも速く強制的に移動させて引き延
ばすものである。Below the heating part b, plate-drawing parts c having a pulling mechanism for the glass thin plates G'are arranged in tandem. Although not shown, the pulling mechanism sandwiches the glass thin plate G'between the rollers and forcibly moves the glass thin plate G faster than the supply speed of the glass base plate G to stretch it.
【００１２】ところで、かかる製造装置により製造され
たガラス薄板Ｇ´は、後工程で肉厚測定器によりリアル
タイムでその肉厚を測定される。By the way, the glass thin plate G'manufactured by such a manufacturing apparatus is measured in real time by a wall thickness measuring device in a later step.
【００１３】このような肉厚測定の結果は、ガラス薄板
Ｇ´の板幅方向に沿った肉厚分布としてモニター画面に
表示され、所望の均一な肉厚が得られているかを作業者
が監視する。The result of such wall thickness measurement is displayed on the monitor screen as a wall thickness distribution along the width direction of the glass thin plate G ', and the operator monitors whether or not a desired uniform wall thickness is obtained. To do.
【００１４】作業者の監視により、例えば、ガラス薄板
Ｇ´の板幅方向に沿った全体の肉厚が薄すぎる時には、
板引部ｃにおける上述したローラーによる引張り速度を
落とすことで肉厚の調整を行う。According to the operator's monitoring, for example, when the entire thickness of the glass thin plate G'in the plate width direction is too thin,
The wall thickness is adjusted by reducing the pulling speed of the above-mentioned roller in the plate drawing portion c.
【００１５】これに対して、ガラス薄板Ｇ´の板幅方向
に沿った肉厚の分布が不均一であり、局部的に肉厚が厚
すぎる部分や薄すぎる部分が存在している場合には、肉
厚が厚すぎる部分については、上述した複数の縦型の電
気ヒータ４５のうち肉厚部分に対応するヒータのパワー
を上げ、反対に肉厚が薄すぎる部分については、当該肉
薄部分に対応するヒータのパワーを下げ、あるいはオフ
にすることにより、肉厚の調整を行っていた。On the other hand, in the case where the distribution of the wall thickness of the glass thin plate G'is uneven along the plate width direction, and there are locally excessively thick or excessively thin parts. As for the portion having too large wall thickness, the power of the heater corresponding to the thick portion of the plurality of vertical electric heaters 45 described above is increased, and conversely, for the portion having too thin wall thickness, the corresponding thin portion is supported. The wall thickness was adjusted by lowering the power of the heater to be turned on or off.
【００１６】[0016]
【発明が解決しようとする課題】しかしながら、従来の
ガラス薄板の製造装置においては、上述したように、対
応する縦型の電気ヒータ４５のパワーの上げ下げ乃至は
オン・オフという消極的な手段によって成形炉４１の幅
方向の温度分布を制御しなければならないため、所望の
温度分布が得られ難く、しかも成形炉４１内の対応する
部分の温度をすぐに上昇させ又は下降させることはでき
ず、ある程度のタイムラグは避けられない。また、肉厚
又は肉薄部分の幅と縦型の電気ヒータ４５の設置間隔と
の関係により、肉厚の調整が容易でない場合もあった。However, in the conventional apparatus for manufacturing a glass thin plate, as described above, the forming is performed by the passive means of raising or lowering the power of the corresponding vertical electric heater 45 or turning it on and off. Since it is necessary to control the temperature distribution in the width direction of the furnace 41, it is difficult to obtain a desired temperature distribution, and it is impossible to immediately raise or lower the temperature of the corresponding portion in the forming furnace 41. The time lag is unavoidable. In addition, the thickness may not be easily adjusted depending on the relationship between the width of the thick or thin portion and the installation interval of the vertical electric heater 45.
【００１７】従って、肉厚測定のモニター結果に応じ
て、肉厚を迅速且つ簡単に調整することが困難であっ
た。Therefore, it is difficult to quickly and easily adjust the wall thickness according to the monitor result of the wall thickness measurement.
【００１８】本発明の目的は、ガラス薄板の板幅方向に
沿った肉厚を迅速且つ簡単に調整することができるガラ
ス薄板の製造方法及び装置を提供することにある。An object of the present invention is to provide a glass thin plate manufacturing method and apparatus capable of quickly and easily adjusting the thickness of the glass thin plate along the plate width direction.
【００１９】[0019]
【課題を解決するための手段】本発明によれば、ガラス
元板を下方へ送る元板供給工程と、下方に移動されたガ
ラス元板を加熱軟化させ、ガラス薄板とする加熱工程
と、ガラス薄板を下方へ引張る板引工程から成るガラス
薄板の製造方法において、前記加熱工程時に、ガラス元
板の幅方向を部分的に冷却する手段によって冷却を行
い、これによってガラス薄板の幅方向に沿った肉厚を調
整することを特徴とするガラス薄板の製造方法が得られ
る。According to the present invention, there is provided a base plate feeding step for feeding a glass base plate downward, a heating step for heating and softening the glass base plate moved downward to form a glass thin plate, and a glass plate. In the method for manufacturing a glass thin plate including a drawing step of pulling a thin plate downward, during the heating step, cooling is performed by means for partially cooling the width direction of the glass base plate, whereby the width direction of the glass thin plate is reduced. A method for manufacturing a thin glass plate is obtained which is characterized by adjusting the wall thickness.
【００２０】また、本発明によれば、ガラス元板を下方
へ送る元板供給部と、該元板供給部の下方に設けられ該
元板供給部により送られ垂下する前記ガラス元板を加熱
軟化させる加熱部と、該加熱部の下方に設けられガラス
薄板を引張る板引部とを縦列に配置して成り、前記元板
供給部と前記板引部に設けたそれぞれの駆動手段を制御
して任意の板引条件が得られるようにしたガラス薄板製
造装置において、前記加熱部に前記ガラス元板の幅方向
に沿って複数の冷却ゾーンに分割されたボックス状の冷
却手段を備え、前記各冷却ゾーンに冷媒を流すことによ
って前記ガラス薄板の幅方向に沿った肉厚を調整するこ
とを特徴とするガラス薄板の製造装置が得られる。Further, according to the present invention, the base plate feeding section for feeding the glass base plate downward, and the glass base plate provided below the base plate feeding section and fed by the base plate feeding section are heated. A heating unit for softening and a plate drawing unit for pulling a thin glass plate provided below the heating unit are arranged in tandem, and each driving means provided in the original plate supply unit and the plate drawing unit is controlled. In the glass thin plate manufacturing apparatus capable of obtaining any plate drawing condition, the heating unit is provided with box-shaped cooling means divided into a plurality of cooling zones along the width direction of the glass base plate, A glass thin plate manufacturing apparatus is obtained in which the thickness of the glass thin plate along the width direction is adjusted by flowing a refrigerant into the cooling zone.
【００２１】更に、本発明によれば、前記冷媒として空
気を用いることを特徴とするガラス薄板の製造装置が得
られる。Furthermore, according to the present invention, there is provided a glass thin plate manufacturing apparatus characterized in that air is used as the refrigerant.
【００２２】更にまた、本発明によれば、更に、前記加
熱部の幅方向に沿った両端側にそれぞれ副冷却手段を備
え、該副冷却手段に冷媒を流すことによって、前記ガラ
ス薄板の肉厚を調整することを特徴とするガラス薄板の
製造装置が得られる。Further, according to the present invention, further, sub-cooling means are provided at both end sides along the width direction of the heating section, and a refrigerant is caused to flow through the sub-cooling means, whereby the thickness of the glass thin plate is increased. It is possible to obtain an apparatus for manufacturing a thin glass plate, which is characterized in that
【００２３】[0023]
【作用】本発明のガラス薄板の製造方法においては、ガ
ラス元板の加熱時に、その幅方向を部分的に冷却する手
段によって冷却も行い、ガラス薄板の幅方向に沿った肉
厚を調整する。In the method for producing a glass thin plate of the present invention, when the glass base plate is heated, it is also cooled by means for partially cooling the width direction of the glass base plate to adjust the thickness of the glass thin plate along the width direction.
【００２４】因みに、冷却手段としては、所期の効果が
得られるものであれば、いずれの手段も使用可能である
が、例えば、ガラス元板と加熱手段との間隙に、複数本
の空冷パイプや水冷パイプをガラス元板の幅方向に沿っ
て縦に配置させれば良い。As the cooling means, any means can be used as long as the desired effect can be obtained. For example, a plurality of air-cooled pipes are provided in the gap between the glass base plate and the heating means. The water cooling pipes may be arranged vertically along the width direction of the glass base plate.
【００２５】また、本発明のガラス薄板の製造装置にお
いては、前記加熱部に前記ガラス元板の幅方向に沿って
複数の冷却ゾーンに分割されたボックス状の冷却手段を
備え、各冷却ゾーンに冷媒を流すことによってガラス薄
板の板幅方向に沿った肉厚を調整する。Further, in the glass thin plate manufacturing apparatus of the present invention, the heating part is provided with a box-shaped cooling means divided into a plurality of cooling zones along the width direction of the glass base plate, and each cooling zone is provided in each cooling zone. The thickness of the thin glass plate along the plate width direction is adjusted by flowing the refrigerant.
【００２６】従って、従来例と異なり、対応する縦型の
電気ヒータのパワーの上げ下げ乃至はオン・オフという
消極的な手段ではなく、対応する冷却ゾーンに冷媒を流
すという積極的な手段によって、ガラス薄板の板幅方向
に沿った肉厚を調整できるので、迅速且つ簡単に肉厚を
調整することができる。Therefore, unlike the conventional example, the glass is not made by the passive means of raising and lowering the power of the corresponding vertical electric heater or by turning it on and off, but by the positive means of flowing the refrigerant into the corresponding cooling zone. Since the thickness of the thin plate along the plate width direction can be adjusted, the thickness can be adjusted quickly and easily.
【００２７】特にボックス状の冷却手段を使用した場合
には、ガラス元板の幅方向に沿って、小面積で、しかも
緩やかに冷却することが可能となるため、成形炉内の所
望の温度分布を得やすく、肉厚の微妙な調整が可能とな
る。In particular, when a box-shaped cooling means is used, it is possible to cool the glass base plate in a small area and in a gentle manner along the width direction of the glass base plate. It is easy to obtain, and the thickness can be finely adjusted.
【００２８】[0028]
【実施例】以下、本発明の方法を実施するためのガラス
薄板の製造装置について、図面を参照して詳細に説明す
る。本実施例のガラス薄板の製造装置は、図４から図６
に示した従来のガラス薄板の製造装置と基本的構成は同
じであり、同様の部分には同様の符号を付してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for manufacturing a thin glass plate for carrying out the method of the present invention will be described in detail below with reference to the drawings. The glass thin plate manufacturing apparatus of this embodiment is shown in FIGS.
The basic structure is the same as that of the conventional apparatus for manufacturing a thin glass plate shown in FIG. 3, and the same portions are denoted by the same reference numerals.
【００２９】即ち、本実施例に係るガラス薄板の製造装
置は、図１に示すように、元板供給部ａ´と加熱部ｂ´
及び板引部ｃ´を縦列に配置して成り、元板供給部ａ´
と板引部ｃ´に設けたそれぞれの駆動手段を制御して任
意の板引条件が得られるようにしている。That is, as shown in FIG. 1, the apparatus for manufacturing a glass thin plate according to the present embodiment, as shown in FIG.
And plate drawing parts c ′ are arranged in a column, and the original plate supplying part a ′
By controlling respective driving means provided in the plate drawing section c ', an arbitrary plate drawing condition can be obtained.
【００３０】予め成形した肉厚の大きなガラス元板Ｇは
垂直に保持されながら所定の送り速度で元板供給部ａ´
から加熱部ｂ´に入っていき、軟化したガラス元板Ｇを
板引部ｃ´により所定の引張速度で下方に引伸してガラ
ス薄板Ｇ´にする。本実施例においては、元板供給部ａ
´は接合炉を構成しており、下降する元板の上端が加熱
部ｂ´に近づくと、もう一枚の元板が接合位置にセット
される。ガスバーナーによって二枚の元板ガラスが自動
的に接合された後、接合箇所は次第に加熱部ｂ´内へと
送り込まれる。The preformed glass base plate G having a large thickness is held vertically and at a predetermined feeding speed, the base plate supply portion a '.
Then, the softened glass base plate G is drawn downward by the plate drawing part c ′ at a predetermined pulling speed into the heating part b ′ to form a glass thin plate G ′. In this embodiment, the base plate supply section a
′ Is a joining furnace, and when the upper end of the descending base plate approaches the heating part b ′, another base plate is set at the joining position. After the two glass sheets are automatically joined by the gas burner, the joining portion is gradually fed into the heating section b '.
【００３１】加熱部ｂ´は、成形炉４１及び徐冷炉４２
から構成される。成形炉４１は、ガラス元板Ｇに熱を伝
達する金属マッフル４６と、金属マッフル４６の周り
に、板幅方向に棒状に延びる電気ヒータ４４を金属マッ
フル４６の高さ方向に沿って複数本設け、また、縦型の
電気ヒータ４５を板幅方向に沿って複数本配置し、レン
ガで組み込んだ構造になっている。これら各棒状電気ヒ
ータ４４の調整により金属マッフル４６の高さ方向の温
度分布を制御し、各縦型の電気ヒータ４５の調整により
金属マッフル４６の幅方向の温度分布を制御するのは、
前述した従来のガラス薄板の製造装置と略同様である。The heating part b'is composed of a forming furnace 41 and a slow cooling furnace 42.
Composed of. The forming furnace 41 is provided with a plurality of metal muffles 46 that transfer heat to the glass base plate G, and a plurality of electric heaters 44 that extend around the metal muffles 46 in a rod shape in the plate width direction along the height direction of the metal muffles 46. In addition, a plurality of vertical electric heaters 45 are arranged along the plate width direction, and the electric heaters 45 are assembled with bricks. The temperature distribution in the height direction of the metal muffle 46 is controlled by adjusting the rod-shaped electric heaters 44, and the temperature distribution in the width direction of the metal muffle 46 is controlled by adjusting the vertical electric heaters 45.
It is substantially the same as the above-described conventional thin glass plate manufacturing apparatus.
【００３２】尚、徐冷炉４２は、成形の完了したガラス
薄板の残留歪を除去するものであり、加熱素子を適宜内
設している。The slow cooling furnace 42 removes residual strain of the glass thin plate that has been molded, and a heating element is appropriately installed therein.
【００３３】本実施例のガラス薄板の製造装置は、図１
から図３に示すように、金属マッフル４６の上部中央の
ガラス元板Ｇを挟む両側に、それぞれガラス元板Ｇの幅
方向に沿って複数の冷却ゾーンに分割された冷却ボック
ス４７Ａを備え、各冷却ゾーンへの冷媒としての空気の
流入を制御することによって金属マッフル４６の対応す
る部分の温度を調節するのが大きな特徴である。The glass thin plate manufacturing apparatus of this embodiment is shown in FIG.
As shown in FIG. 3, a cooling box 47A divided into a plurality of cooling zones along the width direction of the glass base plate G is provided on both sides of the glass muffle plate 46 at the center of the upper part of the metal muffle 46. A major feature is that the temperature of the corresponding portion of the metal muffle 46 is adjusted by controlling the inflow of air as a refrigerant into the cooling zone.
【００３４】即ち、各冷却ボックス４７Ａは、ガラス元
板Ｇの幅方向に沿って複数個の空冷ゾーン４７ａに分割
されており、各空冷ゾーン４７ａには空気の流入・流出
用それぞれの空冷パイプ４８ａが連結されている。尚、
各空冷パイプ４８ａに供給する空気の量は、図示しない
バルブの開閉により制御し得るようになっている。That is, each cooling box 47A is divided into a plurality of air cooling zones 47a along the width direction of the glass base plate G, and each air cooling zone 47a has air cooling pipes 48a for inflow and outflow of air. Are connected. still,
The amount of air supplied to each air cooling pipe 48a can be controlled by opening and closing a valve (not shown).
【００３５】さて、本実施例のガラス薄板の製造装置を
用いる場合にも、上述した従来例と同様に、製造された
ガラス薄板Ｇ´は、後工程で肉厚測定器によりリアルタ
イムでその肉厚を測定され、測定結果はガラス薄板Ｇ´
の板幅方向に沿った肉厚分布としてモニター画面に表示
され、所望の均一な肉厚が得られているかを作業者が監
視するものとする。作業者の監視により、例えば、ガラ
ス薄板Ｇ´の板幅方向に沿った全体の肉厚が薄すぎる時
には、板引部ｃ´におけるローラーによる引張り速度を
落とすことで肉厚の調整を行う。これに対して、ガラス
薄板Ｇ´の板幅方向に沿った肉厚の分布が不均一であ
り、局部的に肉厚が厚すぎる部分や薄すぎる部分が存在
している場合には、肉厚が厚すぎる部分については、上
述した複数の縦型の電気ヒータ４５のうち肉厚部分に対
応するヒータのパワーを上げ、反対に肉厚が薄すぎる部
分については、当該肉薄部分に対応するヒータのパワー
を下げ、あるいはオフにすることにより、肉厚の調整を
試みるのは従来例と同様である。Even when the apparatus for manufacturing a glass thin plate of this embodiment is used, the manufactured glass thin plate G'has its wall thickness measured in real time by a wall thickness measuring device in a subsequent step, as in the conventional example described above. Is measured, and the measurement result is a glass thin plate G '.
The thickness distribution along the plate width direction is displayed on the monitor screen, and the operator monitors whether the desired uniform thickness is obtained. According to the operator's monitoring, for example, when the entire thickness of the glass thin plate G ′ along the plate width direction is too thin, the thickness of the thin glass plate G ′ is adjusted by reducing the pulling speed of the roller in the plate drawing portion c ′. On the other hand, when the distribution of the wall thickness of the glass thin plate G ′ along the plate width direction is non-uniform and there are locally locally too thick or too thin parts, the wall thickness is Is increased too much, the power of the heater corresponding to the thick portion of the plurality of vertical electric heaters 45 described above is increased, and conversely, the excessively thin portion of the heater corresponding to the thin portion is increased. Attempting to adjust the wall thickness by lowering or turning off the power is the same as in the conventional example.
【００３６】しかしながら、本実施例のガラス薄板の製
造装置においては、対応する縦型の電気ヒータ４５のパ
ワーの上げ下げ乃至はオン・オフという手段に加え、各
冷却ボックス４７Ａにおける各空冷ゾーン４７ａに冷媒
としての空気を流すことによってガラス薄板Ｇ´の板幅
方向に沿った肉厚を調整する。However, in the apparatus for manufacturing a glass thin plate of this embodiment, in addition to the means for raising and lowering the power of the corresponding vertical electric heater 45 or turning it on and off, the refrigerant is provided in each air cooling zone 47a in each cooling box 47A. The thickness of the glass thin plate G ′ along the plate width direction is adjusted by flowing air as
【００３７】即ち、肉厚が薄すぎる部分については、複
数の空冷ゾーン４７ａのうち当該肉薄部分に対向する空
冷ゾーンに空冷用の空気の流入量を多くしたり、あるい
はオンにする。更に、対応する縦型の電気ヒータ４５の
パワーを下げ、あるいはオフにする。That is, for a portion having an excessively small wall thickness, the inflow amount of air for air cooling is increased or turned on in the air cooling zone facing the thin wall portion among the plurality of air cooling zones 47a. Further, the power of the corresponding vertical electric heater 45 is lowered or turned off.
【００３８】反対に、肉厚が厚すぎる部分については、
複数の空冷ゾーン４７ａのうち当該肉厚部分に対向する
空冷ゾーンへの空冷用の空気の流入量を少なくしたり、
あるいはオフにする。更に、対応する縦型の電気ヒータ
４５のパワーを上げ、あるいはオンにする。On the other hand, for the portion where the wall thickness is too thick,
To reduce the inflow amount of air for air cooling to the air cooling zone facing the thick portion of the plurality of air cooling zones 47a,
Or turn it off. Further, the power of the corresponding vertical electric heater 45 is increased or turned on.
【００３９】従って、従来例と異なり、対応する縦型の
電気ヒータ４５のパワーの上げ下げ乃至はオン・オフと
いう消極的な手段のみならず、対応する空冷ゾーンに空
冷用の空気を流すという積極的な手段によって、ガラス
薄板Ｇ´の板幅方向に沿った肉厚を調整できるので、迅
速且つ簡単に肉厚を調整することができる。Therefore, unlike the conventional example, not only the passive means of raising or lowering the power of the corresponding vertical electric heater 45 or turning it on and off, but also positively flowing the air for air cooling into the corresponding air cooling zone. Since the wall thickness of the glass thin plate G ′ along the plate width direction can be adjusted by any means, the wall thickness can be adjusted quickly and easily.
【００４０】一方、金属マッフル４６の幅方向両端側上
部には、それぞれ副冷却ボックス４７Ｂ、４７Ｂと４７
Ｃ、４７Ｃが形成されている。各副冷却ボックス４７
Ｂ、４７Ｃは、それぞれ１個の空冷ゾーンから成り、各
空冷ゾーンに空気の流入・流出用それぞれの空冷パイプ
４８ｂ、４８ｃが連結されている。尚、各空冷パイプ４
８ｂ、４８ｃに供給する空気の量も、図示しないバルブ
の開閉により制御し得るようになっている。On the other hand, the sub-cooling boxes 47B, 47B and 47 are provided on the upper portions of both ends in the width direction of the metal muffle 46.
C and 47C are formed. Each sub-cooling box 47
Each of B and 47C is composed of one air cooling zone, and air cooling pipes 48b and 48c for inflow and outflow of air are connected to each air cooling zone. In addition, each air-cooled pipe 4
The amount of air supplied to 8b and 48c can also be controlled by opening and closing a valve (not shown).
【００４１】これら副冷却ボックス４７Ｂ、４７Ｂ及び
４７Ｃ、４７Ｃは、以下に説明するように、特にガラス
薄板の板幅方向両端部の肉厚調整に用いられる。These sub-cooling boxes 47B, 47B and 47C, 47C are used for adjusting the wall thickness of both ends of the glass thin plate in the plate width direction, as described below.
【００４２】即ち、一般にガラス元板を単純に加熱して
引張るのでは両縁部に近づくほど流れが遅いので延びが
少なくなり、中央部が両縁部よりも強く引き延ばされる
結果、両縁部は中央部よりも肉厚となる傾向にある。そ
こで軟化後更に両縁部を集中的に加熱し中央部に比して
粘度を下げることにより、両縁部に局部的な厚肉を生じ
るが両縁部以外の部分を幅広く均一な肉厚分布のものと
する。That is, in general, when the glass base plate is simply heated and pulled, the flow becomes slower as it approaches both edges, so that the elongation is reduced, and the central portion is stretched more strongly than both edges. Has a tendency to be thicker than the central part. Therefore, after softening, both edges are intensively heated to lower the viscosity compared to the central part, resulting in localized thickening at both edges, but the portions other than both edges have a wide and uniform thickness distribution. It is assumed that
【００４３】そして、この両縁部以外の均一な肉厚分布
の部分をできるだけ幅広く取れるようにするため、図２
及び図３に示したように、金属マッフル４６における冷
却ボックス４７Ａ、４７Ａそれぞれの両側部分５０には
空冷ゾーンは設けられておらず、この両側部分５０に対
応する縦型の電気ヒータ４５のパワーを上げて加熱し、
副冷却ボックス４７Ｂ、４７Ｂ及び４７Ｃ、４７Ｃは、
更にその外側を空冷して両縁部を局部的に厚肉としつつ
も両縁部以外の均一な肉厚部分を可及的に幅広くする機
能を果たす。In order to obtain as wide as possible a portion having a uniform wall thickness distribution other than the both edge portions, FIG.
As shown in FIG. 3 and FIG. 3, the air cooling zones are not provided in both side portions 50 of the cooling boxes 47A and 47A in the metal muffle 46, and the power of the vertical electric heater 45 corresponding to the both side portions 50 is changed. Raise and heat,
The sub-cooling boxes 47B, 47B and 47C, 47C are
Further, the outer side thereof is air-cooled to locally thicken both edges, while achieving a function of widening a uniform thickness portion other than both edges as much as possible.
【００４４】従って、冷却ボックス４７Ａ、４７Ａにお
ける対応する空冷ゾーンに空冷用の空気を流すことによ
り、両縁部以外の均一な肉厚を達成できるだけでなく、
副冷却ボックス４７Ｂ、４７Ｂ及び４７Ｃ、４７Ｃに空
冷用の空気を流すことによって、この両縁部以外の均一
な肉厚部分を幅広く得ることができる。Therefore, by flowing the air for air cooling to the corresponding air cooling zones in the cooling boxes 47A, 47A, not only a uniform wall thickness except for the both edges can be achieved, but also
By supplying air for air cooling to the sub-cooling boxes 47B, 47B and 47C, 47C, it is possible to obtain a wide uniform thickness portion other than the both edge portions.
【００４５】[0045]
【発明の効果】以上説明したように、本発明のガラス薄
板の製造方法においては、ガラス元板の加熱時に、その
幅方向を部分的に冷却する手段によって冷却も行うこと
によって、加熱手段の調整だけではなく、必要に応じて
積極的に冷却し、成形炉の幅方向の温度分布を制御する
ことができ、製造されるガラス薄板の肉厚を迅速且つ簡
単に調整することができる。As described above, in the method for producing a glass thin plate of the present invention, when the glass base plate is heated, cooling is also performed by means for partially cooling the width direction of the glass base plate to adjust the heating means. Not only that, the temperature distribution in the width direction of the forming furnace can be controlled by positively cooling as necessary, and the thickness of the glass sheet to be manufactured can be adjusted quickly and easily.
【００４６】また、本発明のガラス薄板の製造装置にお
いては、加熱部にガラス元板の幅方向に沿って複数の冷
却ゾーンに分割されたボックス状の冷却手段を備え、ガ
ラス元板の幅方向に沿って対応する冷却ゾーンに冷媒を
流すことができるため、成形炉の所望の温度分布が得や
すく、また製造されるガラス薄板の肉厚を迅速且つ簡単
に調整することができる。Further, in the glass thin plate manufacturing apparatus of the present invention, the heating section is provided with box-shaped cooling means divided into a plurality of cooling zones along the width direction of the glass base plate, and the glass base plate width direction. Since it is possible to flow the cooling medium to the corresponding cooling zone along with, the desired temperature distribution of the forming furnace can be easily obtained, and the thickness of the glass sheet to be manufactured can be adjusted quickly and easily.
【００４７】また、請求項４記載のガラス薄板の製造装
置においては、副冷却手段に冷媒を流すことによって、
上記両縁部以外の均一な肉厚部分を幅広く得ることがで
きる。Further, in the apparatus for manufacturing a thin glass plate according to claim 4, by flowing the refrigerant through the sub-cooling means,
It is possible to obtain a wide uniform thickness portion other than the both edge portions.
【００４８】以上により、本発明のガラス薄板の製造方
法及び装置は、製造されるガラス薄板の歩留まりを大幅
に向上させ得るので、ガラス薄板の生産性の向上に資す
るところ大である。As described above, the method and apparatus for manufacturing a glass thin plate of the present invention can greatly improve the yield of the glass thin plate to be manufactured, which greatly contributes to the improvement of the productivity of the glass thin plate.
【図１】本発明の実施例に係るガラス薄板の製造装置の
全体構造を示す正面図である。FIG. 1 is a front view showing the overall structure of a glass thin plate manufacturing apparatus according to an embodiment of the present invention.
【図２】図１に示したガラス薄板の製造装置における金
属マッフルの拡大正面図である。FIG. 2 is an enlarged front view of a metal muffle in the glass thin plate manufacturing apparatus shown in FIG.
【図３】図２に示した金属マッフルのＡ−Ａ視断面図で
ある。3 is a cross-sectional view of the metal muffle shown in FIG. 2, taken along line AA.
【図４】従来のガラス薄板の製造装置の全体構造を示す
側面図である。FIG. 4 is a side view showing the overall structure of a conventional glass thin plate manufacturing apparatus.
【図５】図４に示したガラス薄板の製造装置の正面図で
ある。5 is a front view of the glass thin plate manufacturing apparatus shown in FIG. 4. FIG.
【図６】図４、図５に示した従来のガラス薄板の製造装
置における加熱部の拡大図であり、（イ）は加熱部の拡
大正面図、（ロ）は同Ａ−Ａ視断面図である。6 is an enlarged view of a heating part in the conventional apparatus for manufacturing a glass thin plate shown in FIGS. 4 and 5, (a) being an enlarged front view of the heating part, and (b) being a sectional view taken along line AA of FIG. Is.
ａ、ａ´ 元板供給部 ｂ、ｂ´ 加熱部 ｃ、ｃ´ 板引部 Ｇ ガラス元板 Ｇ´ ガラス薄板 ４１ 成形炉 ４２ 徐冷炉 ４４ 棒状電気ヒータ ４５ 縦型の電気ヒータ ４６ 金属マッフル ４７Ａ 冷却ボックス ４７ａ 空冷ゾーン ４７Ｂ、４７Ｃ 副冷却ボックス ４８ａ、４８ｂ、４８ｃ 空冷パイプ a, a'Base plate supply unit b, b'heating unit c, c'drawing part G glass base plate G'Glass thin plate 41 Molding furnace 42 Annealing furnace 44 Rod-shaped electric heater 45 Vertical electric heater 46 metal muffle 47A cooling box 47a Air cooling zone 47B, 47C Sub-cooling box 48a, 48b, 48c Air-cooled pipe
Claims (4)
と、下方に移動されたガラス元板を加熱軟化させ、ガラ
ス薄板とする加熱工程と、ガラス薄板を下方へ引張る板
引工程から成るガラス薄板の製造方法において、前記加
熱工程時に、ガラス元板の幅方向を部分的に冷却する手
段によって冷却を行い、これによってガラス薄板の幅方
向に沿った肉厚を調整することを特徴とするガラス薄板
の製造方法。1. A base plate feeding step of feeding a glass base plate downward, a heating step of heating and softening the glass base plate moved downward to form a glass thin plate, and a plate drawing step of pulling the glass thin plate downward. In the method for producing a glass thin plate, at the time of the heating step, cooling is performed by means for partially cooling the width direction of the glass original plate, thereby adjusting the thickness along the width direction of the glass thin plate. Method for manufacturing glass sheet.
該元板供給部の下方に設けられ該元板供給部により送ら
れ垂下する前記ガラス元板を加熱軟化させる加熱部と、
該加熱部の下方に設けられガラス薄板を引張る板引部と
を縦列に配置して成り、前記元板供給部と前記板引部に
設けたそれぞれの駆動手段を制御して任意の板引条件が
得られるようにしたガラス薄板製造装置において、前記
加熱部に前記ガラス元板の幅方向に沿って複数の冷却ゾ
ーンに分割されたボックス状の冷却手段を備え、前記各
冷却ゾーンに冷媒を流すことによって前記ガラス薄板の
幅方向に沿った肉厚を調整することを特徴とするガラス
薄板の製造装置。2. A base plate supply section for feeding a glass base plate downward,
A heating unit that is provided below the base plate supply unit and heats and softens the glass base plate that is fed and hung by the base plate supply unit;
Arranged in tandem with a plate-drawing part that is provided below the heating part and pulls the glass thin plate, and controls the respective driving means provided in the original plate supply part and the plate-drawing part to set arbitrary plate-drawing conditions. In the glass thin plate manufacturing apparatus so as to obtain a box-shaped cooling means divided into a plurality of cooling zones along the width direction of the glass base plate in the heating portion, the refrigerant flows in each of the cooling zones. A glass thin plate manufacturing apparatus, characterized in that the thickness of the glass thin plate along the width direction is adjusted thereby.
おいて、前記冷媒として空気を用いることを特徴とする
ガラス薄板の製造装置。3. The glass thin plate manufacturing apparatus according to claim 2, wherein air is used as the refrigerant.
おいて、更に、前記加熱部の幅方向に沿った両端側にそ
れぞれ副冷却手段を備え、該副冷却手段に冷媒を流すこ
とによって、前記ガラス薄板の肉厚を調整することを特
徴とするガラス薄板の製造装置。4. The apparatus for manufacturing a glass thin plate according to claim 2, further comprising sub-cooling means on both end sides along the width direction of the heating section, and flowing a refrigerant through the sub-cooling means, An apparatus for manufacturing a thin glass plate, which is characterized in that the thickness of the thin glass plate is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32744494A JP3468251B2 (en) | 1994-12-28 | 1994-12-28 | Method and apparatus for manufacturing thin glass plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32744494A JP3468251B2 (en) | 1994-12-28 | 1994-12-28 | Method and apparatus for manufacturing thin glass plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08183627A JPH08183627A (en) | 1996-07-16 |
| JP3468251B2 true JP3468251B2 (en) | 2003-11-17 |
Family
ID=18199242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32744494A Expired - Fee Related JP3468251B2 (en) | 1994-12-28 | 1994-12-28 | Method and apparatus for manufacturing thin glass plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3468251B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090874B (en) * | 2004-12-27 | 2011-03-02 | 古河电气工业株式会社 | Process for producing glass strip, glass strip and glass substrate |
| JP4794982B2 (en) * | 2005-10-27 | 2011-10-19 | 古河電気工業株式会社 | Manufacturing method of glass strip |
| JP4865298B2 (en) * | 2005-11-01 | 2012-02-01 | 古河電気工業株式会社 | Manufacturing method of glass strip |
| JP5416092B2 (en) | 2008-03-28 | 2014-02-12 | 古河電気工業株式会社 | Manufacturing method of plate material |
| US9670089B2 (en) * | 2009-07-08 | 2017-06-06 | Nippon Electric Glass Co., Ltd. | Glass sheet |
| CN108101345B (en) * | 2017-11-22 | 2020-12-01 | 彩虹显示器件股份有限公司 | Integrated thickness air adjusting system and method for glass substrate forming equipment |
-
1994
- 1994-12-28 JP JP32744494A patent/JP3468251B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08183627A (en) | 1996-07-16 |
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