TW201036923A - Method and apparatus for producing glass sheet - Google Patents
Method and apparatus for producing glass sheet Download PDFInfo
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- TW201036923A TW201036923A TW099106400A TW99106400A TW201036923A TW 201036923 A TW201036923 A TW 201036923A TW 099106400 A TW099106400 A TW 099106400A TW 99106400 A TW99106400 A TW 99106400A TW 201036923 A TW201036923 A TW 201036923A
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- 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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
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- General Chemical & Material Sciences (AREA)
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- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
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Abstract
Description
201036923 六、發明說明： 【發明所屬之技術領域】 本發明，係關於一種玻璃板之製造方法及製造裝置。 本發明’特別是關於一種以下拉（down draw)法來製造玻璃 板的技術。 【先前技術】 T拉法’係指一種使自楔形玻璃板成形裝置之上部之 槽溢出的熔融玻璃沿著玻璃板成形裝置的側壁流下，然後 使其在玻璃板成形裝置之下端（底部）熔合，以連續地成形為 玻璃帶（glass ribbon)的方法。玻璃帶’係一面由設置在玻璃 板成形裝置下方之輥所支持，一面進入爐内，慢慢冷卻， 然後切斷以得到所需大小之玻璃板。 下拉法’適合於製造大面積且薄的玻璃板，例如平面 顯不器用玻璃基板。例如，曰本特開2〇〇8_ 133174號公報， I7。己載有一種穩定地製造極薄之玻璃板（例如〇.5mm以下） 的技術。具體而言，於成形體（玻璃板成形裝置）的正下方使 玻璃帶之板厚薄至初期厚度後，再以設置在控制手段（冷卻 滾輪）下方的再加熱手段（加熱器）將該玻璃帶加熱至軟化點 以上的溫度，使其軟化’然後將軟化之玻璃帶拉長於下方， 使板厚更薄。 又，為了成形高品質的玻璃帶，於玻璃板成形裝置之 側壁的熔融玻璃之寬度方向的溫度控管相當重要。例如， 於日本特開2007— 1 12665號公報，記載有一種將設置有高 201036923 密度之發熱體的加熱器設在面對成形體（玻璃板成形裝置） 之側壁的位置，藉此’以使熔融玻璃之寬度方向的溫度分 布均一化的技術。而於日本特開2008 — 69024號公報，則 §己載有一種藉由對融合單元（fusi〇n cell)(玻璃板成形裝置） 之表面的白金被膜進行通電加熱，來使熔融玻璃之寬度方 向的溫度分布均一化的技術。 [專利文獻1]曰本特開2008 — 133174號公報 [專利文獻2]日本時間2007— 1 12665號公報 [專利文獻3]日本特開2008 — 69024號公報 【發明内容】 又，以下拉法所成形之玻璃帶的端部，通常係呈圖7 八_ ^/狀准，玻璃帶之端部並不是經常為此形狀，有201036923 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a method and a manufacturing apparatus for manufacturing a glass sheet. The present invention is particularly directed to a technique for producing a glass sheet by a down draw method. [Prior Art] T-drawing means a molten glass that overflows from a groove in the upper portion of the wedge-shaped glass sheet forming apparatus, flows down along the side wall of the glass sheet forming apparatus, and then fused at the lower end (bottom) of the glass sheet forming apparatus. A method of continuously forming into a glass ribbon. The glass ribbon is supported by a roller disposed under the glass sheet forming apparatus, enters the furnace while being slowly cooled, and then cut to obtain a glass plate of a desired size. The pull-down method is suitable for manufacturing a large-area and thin glass plate, such as a glass substrate for a flat display. For example, 曰本特开2〇〇8_ 133174, I7. A technique for stably producing extremely thin glass sheets (for example, 〇5 mm or less) has been carried out. Specifically, after the thickness of the glass ribbon is reduced to the initial thickness immediately below the molded body (glass plate forming apparatus), the glass ribbon is further heated by a reheating means (heater) provided under the control means (cooling roller). Heat to a temperature above the softening point to soften it' and then stretch the softened glass ribbon down to make the sheet thinner. Further, in order to form a high-quality glass ribbon, temperature control in the width direction of the molten glass on the side wall of the glass sheet forming apparatus is important. For example, Japanese Laid-Open Patent Publication No. 2007-12526 discloses that a heater provided with a heat generating body having a high density of 201036923 is disposed at a position facing a side wall of a molded body (glass plate forming device), thereby A technique in which the temperature distribution in the width direction of the molten glass is uniformized. In Japanese Laid-Open Patent Publication No. 2008-69024, § has been carried out by heating a platinum film on the surface of a fuse unit (glass plate forming apparatus) to increase the width direction of the molten glass. The technique of uniformizing the temperature distribution. [Patent Document 1] JP-A-2008-133174 [Patent Document 2] Japanese Patent Laid-Open Publication No. JP-A No. Hei. The end of the formed glass ribbon is usually in the shape of Figure VIII. The end of the glass ribbon is not often this shape.
亦即， 本發明提供： ，係藉由下拉法之玻璃板之製 種破璃板之製造方法 201036923 造方法，亦即，在玻璃板成形裝置之下端使熔融玻璃熔合， 成形為玻璃帶，然後沿著設置在該玻璃板成形裝置之下方 的複數輥將該玻璃帶搬送於下方， 於該玻璃板成形裝置之下端與距離該玻璃板成形裝置 最近之該輥間的空間設置加熱器， 一面以該加熱器對剛熔合之該玻璃帶的端部局部地進 ^亍加熱’一面實施該玻璃帶之成形及搬送。 於另一形態，本發明提供： 一種玻璃板之製造裝置，係具備有： 具有楔形剖面之玻璃板成形裝置、 複數輥，設置在該玻璃板成形裝置之下方、用以將玻 璃帶搬送於該玻璃板成形裝置之下方，其中，該玻璃帶係 藉由使自該玻璃板成形裝置之上部之槽溢出的熔融玻璃於 该玻璃板成形裝置之下端熔合所成形者；以及 加熱器，以可對剛熔合之該玻璃帶之寬度方向的端部 局部地進行加熱的方式，設置在該玻璃板成形裝置之下端 與距離該玻螭板成形裝置最近之該輥間之空間。 剛炼合之玻璃帶，由於並未完全地固化，處於黏性流 ㈣狀態’因此容易受到周圍溫度的影響。通常，玻璃帶 的端部會比玻璃帶的中央部更快冷卻。若端部的溫度下降 遠快於中央部的溫度下降’則在寬度方向上黏度的參差不 齊會加劇’容易發生端部的形狀不良。 才對於此，右根據上述本發明，則以加熱器對剛熔合 之玻璃帶的端部局部地進行加熱。亦即，僅防止剛離開玻 201036923 璃板成形裝置之玻璃帶的端部急速地受到冷卻。藉此 使玻璃帶之寬度方向的溫度分布，亦即黏度分布二化， =生端部的形狀不良。由於可挪用既有之裝置來實施 本發明，因此本發明在成本面上亦優異。 Ο 开it了得到與本發明相同的效果，亦考量提高玻璃板成 形裝置之下端附近之爐内的環境氣氛溫度。若以方式則 或許可得到與本發明相同的效果。然…於本發明只要 對玻璃帶之端部局部地進行加熱即為充分，因此在電力消 耗上相當有利。又’若使爐内之環境氣氛為高⑨，則由於 會加速各種零件的劣化，使裝置壽命縮短，故並不佳。 另，「玻璃帶之端部」，例如，係指從玻璃帶之側面 至内側約50mm之位置的區域。 【實施方式】 以下，參照所添附之圖式說明本發明之—實施形態。 如圖1及圖2所示，本實施形態之玻璃板之製造裝置 _，係具備有爐2、設置在爐2内之上部的玻璃板成形裝 置4、a又置在玻璃板成形裝置4之下方的複數親6、及靠近 玻璃板成形裝置4之下端4e(底部）所設置之加熱器8。根據 此裝置100,可藉由使從玻璃板成形裝置4所溢出之熔融玻 璃在下端4e熔合而成形為玻璃帶9的下拉法，來製造玻璃 板。 爐2 ’通常係由耐火磚作成。於爐2之内壁，沿著鉛直 方向設置有複數加熱器10。加熱器10，係平行於玻璃板成 201036923 形裝置4之長邊方向延伸之長尺寸形狀者，適合於對較廣 的範圍進行加熱。藉由控制加熱器1〇，可調節爐2之内部 的溫度。具體而言，當在爐2内往下方前進時，係沿著鉛 直方向形成溫度梯度以使玻璃帶9慢慢冷卻。 玻璃板成形裝置4,通常係由耐火磚作成。如圖2所示， 於正交於玻璃板成形裝置4之長邊方向LD之剖面，玻璃板 成形裝置4係呈楔形。玻璃板成形裝置4之長邊方向 係與玻璃帶9之寬度方向一致。於玻璃板成形裝置4的上 部，形成有延伸於長邊方向LD之用以保持熔融玻璃的槽 仆。如圖i所示，供給管n係連接於槽4k，使得可從長邊 方向LD之一方側將熔融玻璃連續供給於槽4k。 如圖2所示，玻璃板成形裝置4,於正交於長邊方向 LD及鉛直方向兩者之方向，具有丨對側壁句·。側壁句，會 形成自槽4k所溢出之熔融玻璃的流路。此等之側壁句·係在 下端4e形成稜線，使得流經各側壁4j之熔融玻璃會在下端 4e炫合。如圖！所示’於玻璃板成形裝置4之長邊方向⑶ 的兩端，分別安裝有用以阻礙熔融玻璃溢出側壁幻的導件 7。如圖4所示，導件7,俯視時係呈楔形，係由可覆蓋玻 璃板成形裝置4之端面整體之大小的板材所作成。於鉛直 方向導件7之則端的位置，係與破璃板成形裝置4之下 端钓一致。藉由導件7的作用，可使得熔融玻璃全部皆沿 著側壁4j流動。 輥6’具有用以將玻璃帶9搬送於玻璃板成形裝置4之 下方的功用。調節輥6的旋轉速度，以成形具有所需厚度 201036923 的玻璃帶9。如圖2所示，係以可將玻璃帶9夾持於厚度方 7的方式，將親6對稱設置於包含玻璃板成形裝置4之下 端的垂直面。又’棍6係以特定間隔設置於錯直方向。 玻璃帶9係在受到此等之輥6夹持的狀態下被搬送於下方。 如圖1所不，加熱器8，係被設置在玻璃板成形裝置4 :長：方向LD的一方側與另一方側。具體而言，係將加熱 益8設在錯直方向上玻璃板成形裝^之下與距離 玻璃板成形裝置4最近之輥6a間的空間。藉由以加熱器8 Ο對剛熔合之玻璃帶9之寬度方向的端部局部地進行加熱， 可防止剛溶合之玻璃帶9之端部的黏度遠高於中央部的黏 度。換言之，可減少玻璃帶9之寬度方向之黏度的參差不 齊。結果，可防止玻璃帶9之端部的形狀不良。並且，亦 可防止玻璃之失透明現象（devitrificati〇n)。 如所周知般，失透明現象，係指晶粒形成於玻璃中， 而使玻·璃之.透吸性降低的現象。在以下拉法製造玻璃板 時，於玻璃帶9之端部容易發生失透明現象。其理由雖未 必清楚’但認為其中-個原因是由於在導件7的附近溶融 玻璃的流速降低，而使得㉟融玻璃保持在容易發生失透明 現象的溫度區域太久的緣故。 若在導件7的附近設置加熱器8，則不僅是玻璃帶9的 端部，而且導件7亦會受到加熱器8的加熱。導件7之熱 將會傳導到導件7附近的熔融玻璃，而可防止僅導件7附 近的熔融f璃保持在容易發生失透明現象的溫度區域太 久。尤其是在熔融玻璃包含作為澄清劑之錫時氧化錫會 201036923 因此’當熔融玻璃 結晶於玻璃中而容易發生失透明現象 包含錫時，特別推薦本發明。 於本實施形態中，加熱器8並不與玻璃板成形裝置4、 導件7及爐2任何-者連接。係將加熱器8的位置調整為 可有效地對剛熔合之玻璃帶9的端部進行加熱。參照圖3 來說明加熱H 8的詳細位置。加熱器8’係、被設在較安裝於 玻璃板成形裝置4之長邊方向⑶兩端的導件7更外側且為 玻璃帶9之側面9p所面對的空間。更詳而言之，加熱器8'， 係被設在鉛i方向上玻璃板成形裝置4的下端4卜與玻璃 帶9之寬度漸減而成為一定之位置ρι間的空間。 如圖3所示，於成形時，玻璃帶9的寬度係從玻璃板 成形裝置4的下端4e漸減至位置ρι。亦即，側面9p呈緩 和彎曲。加熱器8係面對側面9p彎曲之部分。藉由將加熱 器8設在此種位置，可高效率地對剛溶合之玻璃帶9的端 部進行加熱。另’雖然亦取決於加熱器8之輸出、尺寸等， 但是從玻璃板成形裝f 4之下端4e(導件7的下端）至加教器 8之鉛直方向的距離Hl，例如為〇〜5〇〇mm， ⑽麵。從導件7之内壁面7§至加熱器8之水平方^的距 離L! ’例如為—10〜1〇〇mm，更佳為〇〜1〇〇爪爪，再更佳為 0〜30mm。惟，應注意加熱器8不要接觸到玻璃帶9。另， 在距離L丨在-1Gmm以上、未達—的情形時係以導件 7之内壁面7g作為基準’使加熱器8之一部分或全部存在 於玻璃帶9所在之側。 如圖2所示，加熱器8，係延伸於與玻璃板成形裝置4 201036923 =邊方向LD及鉛直方向兩者正交的水平方向，亦即破璃 帶9的厚度方向。如圖4所示，玻璃帶9之厚度方向上 加熱器8的尺寸Wl，大於該方向上之玻璃板成形裝置= 尺寸^以及導件7的尺寸W3。根據此種構成，則由於從 玻璃帶9表面侧與背面侧之兩側至端部 熱，因此可更有效地防止形狀不良…藉由丄=力: 具有充分的尺寸Wl，可使得導件7的下部亦能受到充分加 熱’因此亦可提高失透明現象的防止效果。That is, the present invention provides: a method for producing a glass frit of a glass plate by a down-draw method, that is, a method of manufacturing a molten glass at a lower end of a glass sheet forming apparatus, forming a glass ribbon, and then forming The glass ribbon is conveyed below along a plurality of rollers disposed under the glass sheet forming apparatus, and a heater is disposed at a lower end of the glass sheet forming apparatus and a space between the rollers closest to the glass sheet forming apparatus, The heater performs the forming and transporting of the glass ribbon by partially heating the end portion of the glass ribbon that has just been fused. In another aspect, the present invention provides: a glass sheet manufacturing apparatus comprising: a glass sheet forming apparatus having a wedge-shaped cross section; and a plurality of rolls disposed under the glass sheet forming apparatus for transporting the glass ribbon to the glass sheet a glass sheet forming apparatus, wherein the glass ribbon is formed by fusing molten glass overflowing from a groove of an upper portion of the glass sheet forming apparatus at a lower end of the glass sheet forming apparatus; and a heater The end portion of the glass ribbon which has just been fused is heated locally, and is disposed at a lower end of the glass sheet forming apparatus and a space between the rollers closest to the glass sheet forming apparatus. The glass ribbon that has just been blended, because it is not completely cured, is in a viscous flow (four) state and is therefore susceptible to ambient temperature. Typically, the ends of the ribbon will cool faster than the center of the ribbon. If the temperature of the end portion drops much faster than the temperature drop at the center portion, the unevenness of the viscosity in the width direction is aggravated, and the shape of the end portion is liable to occur. For this reason, according to the above invention, the end portion of the just-fused glass ribbon is locally heated by a heater. That is, only the end of the glass ribbon which has just left the glass 201036923 glass forming apparatus is rapidly cooled. Thereby, the temperature distribution in the width direction of the glass ribbon, that is, the viscosity distribution is made uniform, and the shape of the green end portion is defective. Since the present invention can be carried out by appropriating an existing device, the present invention is also excellent in cost. The same effect as the present invention is obtained, and the temperature of the ambient atmosphere in the furnace near the lower end of the glass sheet forming apparatus is also considered. If it is in the form, it is possible to obtain the same effect as the present invention. However, in the present invention, it is sufficient to locally heat the end portion of the glass ribbon, which is advantageous in terms of power consumption. Further, if the ambient atmosphere in the furnace is set to be high 9, the deterioration of various components is accelerated, and the life of the device is shortened, which is not preferable. Further, the "end portion of the glass ribbon" means, for example, a region from the side of the glass ribbon to the inner side at a position of about 50 mm. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. As shown in Fig. 1 and Fig. 2, the apparatus for manufacturing a glass sheet according to the present embodiment includes a furnace 2, a glass sheet forming apparatus 4 provided in the upper portion of the furnace 2, and a, which is placed in the glass sheet forming apparatus 4. The lower plurality of pros 6 and the heater 8 disposed near the lower end 4e (bottom) of the glass sheet forming apparatus 4. According to this apparatus 100, a glass plate can be produced by a down-draw method in which the molten glass overflowed from the glass sheet forming apparatus 4 is fused at the lower end 4e to form the glass ribbon 9. Furnace 2' is typically made of refractory bricks. On the inner wall of the furnace 2, a plurality of heaters 10 are disposed in the vertical direction. The heater 10 is a long-length shape extending parallel to the longitudinal direction of the 201036923-shaped device 4, and is suitable for heating a wide range. The temperature inside the furnace 2 can be adjusted by controlling the heater 1〇. Specifically, when advancing downward in the furnace 2, a temperature gradient is formed along the vertical direction to slowly cool the glass ribbon 9. The glass sheet forming apparatus 4 is usually made of refractory bricks. As shown in Fig. 2, the glass sheet forming apparatus 4 has a wedge shape in a cross section orthogonal to the longitudinal direction LD of the glass sheet forming apparatus 4. The longitudinal direction of the glass sheet forming apparatus 4 coincides with the width direction of the glass ribbon 9. In the upper portion of the glass sheet forming apparatus 4, a groove for holding the molten glass extending in the longitudinal direction LD is formed. As shown in Fig. 1, the supply pipe n is connected to the groove 4k so that the molten glass can be continuously supplied to the groove 4k from one side in the longitudinal direction LD. As shown in Fig. 2, the glass sheet forming apparatus 4 has a side wall sentence in a direction orthogonal to both the longitudinal direction LD and the vertical direction. The side wall sentence forms a flow path of the molten glass overflowed from the groove 4k. These side wall sentences form a ridge line at the lower end 4e so that the molten glass flowing through each side wall 4j will hang at the lower end 4e. As shown! At both ends of the longitudinal direction (3) of the glass sheet forming apparatus 4, guides 7 are provided to prevent the molten glass from overflowing the side walls. As shown in Fig. 4, the guide member 7 has a wedge shape in plan view and is made of a sheet material which covers the entire size of the end surface of the glass sheet forming apparatus 4. The position of the end of the vertical direction guide 7 coincides with the lower end of the glass forming device 4. By the action of the guide 7, all of the molten glass can flow along the side wall 4j. The roller 6' has a function for conveying the glass ribbon 9 below the glass sheet forming apparatus 4. The rotational speed of the roller 6 is adjusted to form a glass ribbon 9 having a desired thickness of 201036923. As shown in Fig. 2, the pros 6 is symmetrically placed on the vertical surface including the lower end of the glass sheet forming apparatus 4 so that the glass ribbon 9 can be sandwiched by the thickness side 7. Further, the 'stick 6' is set at a predetermined interval in the wrong direction. The glass ribbon 9 is conveyed to the lower side in the state clamped by the roller 6. As shown in Fig. 1, the heater 8 is provided on one side and the other side of the glass sheet forming apparatus 4: length: direction LD. Specifically, the heating benefit 8 is set in a space between the glass sheet forming apparatus in the wrong direction and the roller 6a closest to the glass sheet forming apparatus 4. By locally heating the end portion of the just-fused glass ribbon 9 in the width direction by the heater 8, it is possible to prevent the viscosity of the end portion of the glass ribbon 9 which is just melted from being much higher than the viscosity of the central portion. In other words, the unevenness of the viscosity in the width direction of the glass ribbon 9 can be reduced. As a result, the shape of the end portion of the glass ribbon 9 can be prevented from being poor. Moreover, the glass can be prevented from being lost (devitrificati〇n). As is well known, the phenomenon of loss of transparency refers to the phenomenon that crystal grains are formed in the glass and the glass absorbing property is lowered. When the glass plate is produced by the following drawing method, the phenomenon of devitrification is likely to occur at the end of the glass ribbon 9. The reason for this is not necessarily clear, but it is considered that the reason is that the flow rate of the molten glass in the vicinity of the guide member 7 is lowered, so that the 35-melt glass is kept in a temperature region where the phenomenon of devitrification is likely to occur for too long. If the heater 8 is provided in the vicinity of the guide 7, not only the end of the glass ribbon 9, but also the guide 7 is heated by the heater 8. The heat of the guide member 7 is conducted to the molten glass in the vicinity of the guide member 7, and it is possible to prevent the molten glass which is only in the vicinity of the guide member 7 from being held in the temperature region where the devitrification phenomenon is likely to occur for too long. In particular, when the molten glass contains tin as a fining agent, the tin oxide will be 201036923. Therefore, the present invention is particularly recommended when the molten glass is crystallized in the glass to easily cause devitrification. In the present embodiment, the heater 8 is not connected to any of the glass sheet forming apparatus 4, the guide 7 and the furnace 2. The position of the heater 8 is adjusted to effectively heat the end of the just-fused glass ribbon 9. The detailed position of the heating H 8 will be described with reference to FIG. The heater 8' is provided outside the guide 7 attached to both ends in the longitudinal direction (3) of the glass sheet forming apparatus 4 and is a space faced by the side surface 9p of the glass ribbon 9. More specifically, the heater 8' is provided in the space between the lower end 4 of the glass sheet forming apparatus 4 and the width of the glass ribbon 9 in the direction of the lead i, and becomes a constant position ρι. As shown in Fig. 3, at the time of molding, the width of the glass ribbon 9 is gradually decreased from the lower end 4e of the glass sheet forming apparatus 4 to the position ρι. That is, the side surface 9p is gently curved. The heater 8 is a portion that is curved toward the side surface 9p. By providing the heater 8 at such a position, the end portion of the glass ribbon 9 that has just been fused can be efficiently heated. Further, although it depends on the output, size, and the like of the heater 8, the distance H1 from the lower end 4e of the glass plate forming member f4 (the lower end of the guide member 7) to the vertical direction of the teaching device 8 is, for example, 〇~5. 〇〇mm, (10) face. The distance L! from the inner wall surface 7 of the guide member 7 to the horizontal direction of the heater 8 is, for example, -10 to 1 mm, more preferably 〇1 to 1 〇〇 claw, and even more preferably 0 to 30 mm. . However, it should be noted that the heater 8 does not come into contact with the glass ribbon 9. Further, in the case where the distance L 丨 is -1 Gmm or more, the inner wall surface 7 g of the guide 7 is used as a reference, and part or all of the heater 8 is present on the side where the glass ribbon 9 is located. As shown in Fig. 2, the heater 8 extends in a horizontal direction orthogonal to both the glass sheet forming apparatus 4 201036923 = the side direction LD and the vertical direction, that is, the thickness direction of the glass ribbon 9. As shown in Fig. 4, the dimension W1 of the heater 8 in the thickness direction of the glass ribbon 9 is larger than the glass sheet forming apparatus = dimension ^ and the dimension W3 of the guide 7 in this direction. According to this configuration, since the surface is heated from the both sides of the surface side and the back side of the glass ribbon 9 to the end portion, it is possible to more effectively prevent the shape from being defective. By the 丄=force: having a sufficient size W1, the guide member 7 can be made The lower part can also be fully heated' so that the effect of preventing the phenomenon of loss of transparency can also be improved.
加熱器8之通電（設定溫度），係考量玻璃之組成、從加 熱器8至玻璃帶9的距離等後，來適當加以控制。例如平 面顯示器用之玻璃板之組成，可在8〇〇〜13〇〇<t的範圍任音 調節加熱器8的設定溫度。 又，如圖4所示，亦可設置用以檢測玻璃板成形裝置* 之側壁4 j之炼融玻璃溫度的溫度感測器12、與用以取得自 狐度感測器U之訊號的控制器14。溫渡感观器12，例如 可女裝在導件7之下部，間接地檢測熔融玻璃之溫度。溫 度感測器12，例如可使用熱電偶。控制器14，係根據溫度 感測器12的檢測結果來控制對加熱器8的通電。例如，使 藉由溫度感測器12所檢測出的溫度與加熱器8的設定溫度 相等。若以上述方式，則可不根據玻璃的組成，適當地控 制加熱器8,可確實防止玻璃帶9之端部的形狀不良。 另，亦可根據溫度感測器12的檢測結果，以手動來調 節加熱器8的輸出。又，當欲檢測玻璃板成形裝置4下端 4e之熔融玻璃寬度方向的中央部溫度時，亦可使用非接觸 11 201036923 式紅外線感測器來作為溫度感測器^ 2。 加熱器8,只要是即使超過灣七之環境氣氛溫度亦 可使用者m特別限^具體而t ’可使用線狀發熱 體、或使線狀發熱體呈線圈狀者來作為加熱器8。並且，亦 可使用陶竞加熱器、齒素加熱器(hal〇gen 、碳化矽發 熱體等之輻射型加熱器。加熱器8的形狀亦無特別加以限 疋，可如圖1〜4所示之棒狀，或亦可如圖5所示之U字形c 如上述之説明，玻璃帶9之端部的寬度由於為5〇職左右 因此為了進行局部加熱，以目卜4所示之形狀的加熱器? 為必要充分。又，亦無須刻意確保加熱器8的佔有空間。 另-方面，若根據圖5所示之U字形的加熱器18，則可以 加熱器18從3方向包圍玻璃帶9之端部^來進行加埶。 若根據本實施形態，則由於玻璃帶9之端部係受到加 熱器8的加熱’因此至玻璃帶9之端部到達輥^為止，可 更加強固地確保黏性流體的性質。因此，如圖6所示，可 以輥6a炎持端部9t來搬送玻璃帶9。換言之，輥以係設 置在夾持端部9t的位置。於玻璃帶9之寬度方向，輥“係 穿過麵帶9的側面。另-方面，位於較輥&下面的其他 輥6’並未炎持端部9t，而是失持較端部9t更内側的部分。 例如，亦可如日本特開2〇〇8— 133174號公報之圖2所 示’以全部的輥不夾持玻璃帶之端部的方式來規定該等之 輥的位置。當端部的黏度高日夺，由實施穩定之搬送的觀點 及預防破璃帶之裂縫的觀點，較佳為避免以輥來夾持端部。 相對於此，根據本實施形態，由於可抑制剛熔合時端 12 201036923 部9t黏度的上升，因此可以Μ 6a央持端部9t來搬送玻璃 帶9。又’若是在玻璃帶9充分硬化前，亦可如圖6所示， 以輥6a施加壓力於端部9t，來使端部％為平坦（某程度）。 當端部9t為平坦時’可使得切斷玻璃帶9的步驟容易化。 雖然亦可隸在較輥6aT㈣其純6來夹持端部I作 是若以距離玻璃板成形裳置4最近的輥6a來夾持端部％ 的話，則使端部9t平坦化之效果最高…若以其他輥6 Ο 來夾持較端部9〖更_的部分，則並不會招致玻璃帶9之 裂縫等不良㈣，可實現穩定的搬送。以此方式，根據本 實施形態，可具有可調整端部9t之形狀的效果、與可穩定 地搬送玻璃帶9的效果。 Ο 簡單地說明玻璃板之製造裝置⑽的作用。若供給至 玻璃板成形裝置4之槽4k的熔融玻璃量超過一定量，則熔 ，玻璃會從槽4k溢出而沿著側壁4j向下流。㈣七Μ 地破璃，為了保持黏性，係以設置在波璃板成形裝置4之 ，圍的加熱器10來加熱。流經各侧壁4j的熔融玻璃於 =合’藉此，使玻璃帶9成形。玻璃帶9，係被引導於互 猎的親6與輥6之間’一面慢慢冷卻一面往下方搬送。 =帶？溫度隨著越往下方越低，玻璃帶9之固化亦隨 則可;:二將搬达至爐2外之玻璃帶9切斷成所需的大小， ⑴』件到玻璃板。 :據本實施形態，由於係藉由加熱器8來加熱玻璃帶9 因此可防止輥6a附近之玻璃帶9之端 中央0P的黏度。玻璃帶9冷卻至玻璃轉移點之溫 13 201036923 度區域發生固化，乃是在爐2内的中間附近大致之目標。 於玻璃板成形裝置4下端4e之熔融玻璃的黏度，係隨 玻璃之組成' 製造條件變化。例如，當製造平面顯示器用 之玻璃板時’於下端4e之熔融玻璃的黏度，係調節在10000 〜60000Pa · s的範圍。熔融玻璃的黏度，係由熔融玻璃的 溫度來控管。若將熔融玻璃的溫度調節在800〜1〇〇(rc的範 圍，則熔融玻璃的黏度將會介於上述範圍。具體而言，係 控制加熱器10來調節爐2内的環境氣氛溫度，使得熔融玻 璃的溫度於下端4e為800〜1000〇C。 尤其是近年來，大面積之玻璃板的需求正逐漸增加。 例如第10代之液晶顯示器用玻璃基板的尺寸， 285〇mmx3〇5〇mm。而由於玻璃帶的寬度越寬，越容易 寬度方向之黏度的參差不齊’因此適用本發明生 果亦獲得提高。另，以下顯示平面顯示器用麵之效 型的玻璃組成。 土之典The energization (set temperature) of the heater 8 is appropriately controlled after considering the composition of the glass, the distance from the heater 8 to the glass ribbon 9, and the like. For example, the composition of the glass plate for the flat display can adjust the set temperature of the heater 8 in the range of 8 〇〇 to 13 〇〇 < t. Moreover, as shown in FIG. 4, a temperature sensor 12 for detecting the temperature of the tempered glass of the side wall 4j of the glass sheet forming apparatus* and a control for obtaining the signal from the fox sensor U may be provided. 14. The temperature-sensing device 12, for example, can be worn in the lower portion of the guide member 7 to indirectly detect the temperature of the molten glass. For the temperature sensor 12, for example, a thermocouple can be used. The controller 14 controls the energization of the heater 8 based on the detection result of the temperature sensor 12. For example, the temperature detected by the temperature sensor 12 is made equal to the set temperature of the heater 8. According to the above aspect, the heater 8 can be appropriately controlled without depending on the composition of the glass, and the shape of the end portion of the glass ribbon 9 can be surely prevented from being defective. Alternatively, the output of the heater 8 can be manually adjusted based on the detection result of the temperature sensor 12. Further, when it is desired to detect the temperature of the central portion in the width direction of the molten glass of the lower end 4e of the glass sheet forming apparatus 4, a non-contact 11 201036923 type infrared sensor can be used as the temperature sensor. The heater 8 can be used as the heater 8 as long as it exceeds the ambient temperature of the bay seven, and the user can specifically use the linear heating element or the linear heating element in a coil shape. Moreover, a radiant heater such as a ceramic heater or a guillotine heater (hal〇gen, a cesium carbide heating element, etc.) may be used. The shape of the heater 8 is not particularly limited, as shown in Figs. The shape of the bar, or the U-shape c as shown in FIG. 5, as described above, the width of the end portion of the glass ribbon 9 is about 5 〇, so in order to perform local heating, the shape shown in FIG. The heater is sufficient as necessary. Further, it is not necessary to intentionally ensure the space occupied by the heater 8. On the other hand, according to the U-shaped heater 18 shown in Fig. 5, the heater 18 can surround the glass ribbon 9 from the three directions. According to the present embodiment, since the end portion of the glass ribbon 9 is heated by the heater 8, the end portion of the glass ribbon 9 reaches the roller, so that the adhesion can be further enhanced. Therefore, as shown in Fig. 6, the glass belt 9 can be conveyed by the roller 6a in the end portion 9t. In other words, the roller is disposed at the position of the grip end portion 9t. In the width direction of the glass ribbon 9, The roller "passes through the side of the belt 9 . Another aspect, located below the roller & The roller 6' does not have an end portion 9t, but is a portion that is more inner than the end portion 9t. For example, it can also be as shown in Fig. 2 of Japanese Patent Laid-Open Publication No. Hei. No. 8-133174. The position of the rollers is defined by the manner in which the rollers do not sandwich the ends of the glass ribbon. When the viscosity of the ends is high, it is preferable to avoid the viewpoint of performing stable transportation and preventing cracks in the glass ribbon. On the other hand, according to the present embodiment, since the increase in the viscosity of the end portion 12 201036923 portion 9t at the time of the fresh fusion can be suppressed, the glass ribbon 9 can be conveyed by the end portion 9t of the crucible 6a. Before the glass ribbon 9 is sufficiently hardened, as shown in Fig. 6, a pressure may be applied to the end portion 9t by the roller 6a to make the end portion % flat (to some extent). When the end portion 9t is flat, the cutting can be made The step of the glass ribbon 9 is facilitated. Although it is also possible to sandwich the end portion I in the lower roller 6aT (four), the end portion I is such that if the end portion is held by the roller 6a closest to the glass sheet forming skirt 4, then The effect of flattening the end portion 9t is the highest... If the other portion of the end portion 9 is clamped by the other roller 6 Ο, then In this way, according to the present embodiment, it is possible to achieve an effect of adjusting the shape of the end portion 9t and an effect of stably conveying the glass ribbon 9 without causing defects such as cracks in the glass ribbon 9 (4). Ο The operation of the glass plate manufacturing apparatus (10) will be briefly explained. When the amount of molten glass supplied to the groove 4k of the glass sheet forming apparatus 4 exceeds a certain amount, the glass is melted, and the glass overflows from the groove 4k and flows downward along the side wall 4j. In order to maintain the viscosity, the glass is heated by the heater 10 disposed around the glass plate forming device 4. The molten glass flowing through the side walls 4j is pressed to make the glass ribbon 9 Forming. The glass ribbon 9, which is guided between the pro 6 and the roller 6 of each other, is slowly cooled while being conveyed downward. = belt? The temperature becomes lower as it goes lower, and the curing of the glass ribbon 9 is also possible; second, the glass ribbon 9 that has been moved to the outside of the furnace 2 is cut to a desired size, (1) the piece to the glass plate. According to the present embodiment, since the glass ribbon 9 is heated by the heater 8, the viscosity of the center TOP of the end of the glass ribbon 9 in the vicinity of the roller 6a can be prevented. The glass ribbon 9 is cooled to the temperature of the glass transition point. 13 The solidification occurs in the 201036923 degree region, which is a rough target near the middle of the furnace 2. The viscosity of the molten glass at the lower end 4e of the glass sheet forming apparatus 4 varies depending on the composition of the glass. For example, when manufacturing a glass plate for a flat panel display, the viscosity of the molten glass at the lower end 4e is adjusted in the range of 10,000 to 60000 Pa·s. The viscosity of the molten glass is controlled by the temperature of the molten glass. If the temperature of the molten glass is adjusted in the range of 800 to 1 Torr (rc), the viscosity of the molten glass will be in the above range. Specifically, the heater 10 is controlled to adjust the ambient temperature in the furnace 2, so that The temperature of the molten glass is 800 to 1000 〇C at the lower end 4e. Especially in recent years, the demand for large-area glass sheets is gradually increasing. For example, the size of the glass substrate for the 10th generation liquid crystal display, 285 〇 mm x 3 〇 5 〇 mm However, since the width of the glass ribbon is wider, the viscosity of the width direction is more uneven. Therefore, the fruit of the present invention is also improved. In addition, the following shows the effect of the surface of the flat panel display.
Si02 : 57 〜70質量％ AI2O3 · 13 〜19 質量 c B2O3 . 8、 “13質量％ MgO : 〇、 ^質量％ CaO : 4〜 6質量％ SrO : 2〜 4質量％ BaO : 0〜 2質量％ Na2〇 ： 0- ~ 1質量％ K2O . 0 〜 1質量％ 201036923Si02 : 57 to 70% by mass AI2O3 · 13 to 19 Mass c B2O3 . 8. "13% by mass MgO : 〇, ^% by mass CaO : 4 to 6% by mass SrO : 2 to 4% by mass BaO : 0 to 2% by mass Na2〇: 0- ~ 1% by mass K2O . 0 ~ 1% by mass 201036923
As203 : 0〜1質量％As203 : 0 to 1% by mass
Sb203 : 0〜1質量％Sb203: 0 to 1% by mass
Sn02 : 0〜1質量％Sn02 : 0 to 1% by mass
Fe203 : 0〜1質量％Fe203 : 0 to 1% by mass
Zr02 : 0〜1質量％ [實施例] 使用具備有耐火磚製之熔解槽與白金製之調整槽（用以 實施澄清步驟之槽）的連續熔解裝置，以155〇t將混合成具 C) 有下述組成之玻璃原料加以熔解，以1 600°C進行澄清，然 後以155(TC進行攪拌，得到熔融玻璃。另，合計質量超過 100%，係由於包含四捨五入所造成之誤差的緣故。Zr02 : 0 to 1% by mass [Examples] A continuous melting device equipped with a refractory brick melting tank and a platinum-made adjustment tank (a tank for carrying out a clarification step) was mixed at 155 〇t to form a C) The glass raw material having the following composition was melted, clarified at 1 600 ° C, and then stirred at 155 (TC to obtain molten glass. Further, the total mass exceeded 100% due to the inclusion of the error caused by rounding.
Si02 : 60.9 質量 ％Si02 : 60.9 mass %
Al2〇3 : 16.9 質量 ％ B2〇3 : 11.6 質量 ％Al2〇3 : 16.9 mass % B2〇3 : 11.6 mass %
Mg〇 : 1·7 質量 ％ —Mg〇 : 1·7 mass % —
CaO : 5.1 質量 ％ 〇 SrO : 2.6 質量 ％CaO : 5.1 mass % 〇 SrO : 2.6 mass %
BaO : 0.7 質量 ％ K20 : 0.25 質量 ％BaO : 0.7 mass % K20 : 0.25 mass %
Fe203 : 0.15 質量 ％Fe203 : 0.15 mass %
Sn02 : 〇 13 質量 ％ 接著’將熔融玻璃供給至參照圖1所説明之玻璃板之 • W装置100。使加熱器8的設定溫度為丨11〇。〇。流進玻璃 反成形裝置4之熔融玻璃的黏度，由於其熔融玻璃的溫度 15 201036923 為120(TC，因此可推估相當於約5〇〇〇pa· s。 持續供給炼融玻璃，使熔融玻璃自玻璃板成形裝置4 溢出，以成形為玻璃帶。將玻璃帶切斷成特定之大小，得 到複數之玻璃板。經檢查此等玻璃板之端部的形狀後，並 無分岔成兩邊者…此等之玻璃板，亦無發生明顯的失 f月現象。另’使用成形時容易為高黏度之其他組成的熔 融玻璃’ U相同的程序成形為玻璃帶。其結果得到具有 良好形狀之端部的玻璃板。 【圖式簡單說明】 圖1，係本發明一實施形態之玻璃板之製造裝置的概略 前視圖。 圖2 ’係沿著1所示之玻璃板之製造t置之n — E線 的概略縱剖面圖。 圖3，係顯示加熱器之詳細位置的部分放大圖。 圖4，係顯示導件及加熱器之尺寸關係的概略圖。 圖5，係顯示加熱器之變形例的概略圖。 圖6，係顯示玻璃帶與輥之位置關係的概略圖。 圖7’係顯示玻璃帶端部之一形狀的剖面圖。 【主要元件符號說明】 2 爐 4 玻璃板成形裝置 4e 下端（底部） 16 201036923 4j 側壁 6,6a 輥 7 導件 8 加熱器 9 玻璃帶 9t 端部 12 溫度感測器 14 控制器 100 玻璃板之製造裝置 17Sn02 : 〇 13% by mass Next, the molten glass was supplied to the W device 100 of the glass plate described with reference to Fig. 1 . The set temperature of the heater 8 is set to 丨11〇. Hey. The viscosity of the molten glass flowing into the glass reverse forming device 4 is 120 (TC, which can be estimated to be equivalent to about 5 〇〇〇pa·s due to the temperature of the molten glass 15 201036923. Continuous supply of molten glass to make the molten glass The glass sheet forming device 4 overflows to form a glass ribbon, and the glass ribbon is cut into a specific size to obtain a plurality of glass sheets. After examining the shape of the end portions of the glass sheets, they are not divided into two sides. ...the glass plates of these have no obvious phenomenon of losing the moon. The other procedure is to form a glass ribbon using the same procedure as the molten glass of other compositions which are easy to be formed at a high viscosity. The result is a good shape end. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic front view showing a manufacturing apparatus of a glass sheet according to an embodiment of the present invention. Fig. 2 ' is a manufacturing method of a glass sheet shown in Fig. 1 Fig. 3 is a partially enlarged view showing the detailed position of the heater. Fig. 4 is a schematic view showing the relationship between the size of the guide and the heater. Fig. 5 shows a modification of the heater. General Fig. 6 is a schematic view showing the positional relationship between the glass ribbon and the roller. Fig. 7' is a cross-sectional view showing the shape of one end of the glass ribbon. [Description of main components] 2 Furnace 4 Glass plate forming device 4e lower end ( Bottom) 16 201036923 4j Side wall 6, 6a Roller 7 Guide 8 Heater 9 Glass strip 9t End 12 Temperature sensor 14 Controller 100 Glass plate manufacturing unit 17
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| JP2009061290A JP5005717B2 (en) | 2009-03-13 | 2009-03-13 | Glass plate manufacturing method and manufacturing apparatus |
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| TWI458689B TWI458689B (en) | 2014-11-01 |
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| JP (1) | JP5005717B2 (en) |
| KR (1) | KR101740730B1 (en) |
| SG (1) | SG165248A1 (en) |
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| TWI750256B (en) * | 2016-11-22 | 2021-12-21 | 美商康寧公司 | Forming bodies for forming continuous glass ribbons and glass forming apparatuses comprising the same |
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| CN115697922A (en) * | 2020-06-18 | 2023-02-03 | 日本电气硝子株式会社 | Glass article manufacturing apparatus and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
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| JP5005717B2 (en) | 2012-08-22 |
| TWI458689B (en) | 2014-11-01 |
| JP2010215428A (en) | 2010-09-30 |
| KR20100103423A (en) | 2010-09-27 |
| KR101740730B1 (en) | 2017-05-26 |
| SG165248A1 (en) | 2010-10-28 |
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