TW201829327A - Glass manufacturing method and method for preheating glass supply tube - Google Patents
Glass manufacturing method and method for preheating glass supply tube Download PDFInfo
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- TW201829327A TW201829327A TW106142650A TW106142650A TW201829327A TW 201829327 A TW201829327 A TW 201829327A TW 106142650 A TW106142650 A TW 106142650A TW 106142650 A TW106142650 A TW 106142650A TW 201829327 A TW201829327 A TW 201829327A
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- supply tube
- preheating
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/094—Means for heating, cooling or insulation
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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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/435—Heating arrangements for furnace walls
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
- C03B7/094—Means for heating, cooling or insulation
- C03B7/096—Means for heating, cooling or insulation for heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
Abstract
Description
[0001] 本發明是關於玻璃製造方法、及玻璃供應管的預熱方法。[0001] The present invention relates to a glass manufacturing method and a method for preheating a glass supply tube.
[0002] 如習知，對於以液晶顯示器(LCD)、有機EL顯示器(OLED)等的平板顯示器(FPD)用的玻璃基板為代表的各種領域所利用的平板玻璃，有著表面缺陷或***等嚴格的製品品味要求的實情。 [0003] 為滿足如以上的要求，廣泛利用下拉法作為平板玻璃的製造方法。此下拉法有習知的溢流下拉法或狹縫下拉法。 [0004] 溢流下拉法是將熔融玻璃流入設置在剖面大致錐形之成形體的上部的溢流槽，一邊使得從該溢流槽向兩側溢出的熔融玻璃沿著成形體兩側的側壁部流下，在成形體的下端部融合一體化，連續成形為一片的平板玻璃。並且狹縫下拉法是在供應熔融玻璃的成形體的底壁形成有狹縫狀的開口部，將熔融玻璃通過此開口部流下藉此連續成形一片的平板玻璃。 [0005] 尤其是溢流下拉法中，成形後的平板玻璃的表背兩面在成形過程中，成形體的任何部位皆未接觸所成形，因此平面度非常良好形成無傷痕等缺陷鍛造面。 [0006] 使用溢流法的平板玻璃製造裝置有如專利文獻1所揭示，具備：內部具有成形體的成形槽；設置在成形體的下方的退火爐；及設置在退火爐下方的冷卻部及裁斷部。該平板玻璃製造裝置是使熔融玻璃從成形體的頂部溢出，並在其下端部融合藉此成形平板玻璃(玻璃帶)，將此平板玻璃通過退火爐除去其內部應變，在冷卻室冷卻至室溫之後，以裁斷部裁斷成預定尺寸所構成。 [先前技術文獻] [專利文獻] [0007] 專利文獻1：日本特開2012-197185號公報[0002] As is known, flat glass used in various fields including glass substrates for flat panel displays (FPD) such as liquid crystal displays (LCDs) and organic EL displays (OLEDs) has strict surface defects or bulges. The truth about the taste requirements of the products. [0003] In order to meet the above requirements, the down-draw method is widely used as a method for manufacturing flat glass. This pull-down method includes a conventional overflow pull-down method or a slit pull-down method. [0004] The overflow down-draw method is a method in which molten glass flows into an overflow groove provided on an upper portion of a molded body having a substantially tapered cross-section, and the molten glass overflowing from the overflow groove to both sides is along the side walls of the molded body. It flows downward, and is integrated at the lower end of the molded body, and is continuously formed into a piece of flat glass. In the slit down-draw method, a slit-shaped opening is formed in the bottom wall of the molded body that supplies the molten glass, and the molten glass flows through this opening to continuously form a sheet of flat glass. [0005] Especially in the overflow down-draw method, during the forming process, the front and back surfaces of the formed flat glass are not in contact with any part of the formed body during the forming process, so the flatness is very good, and no forged surface such as flaws is formed. [0006] As disclosed in Patent Document 1, a flat glass manufacturing apparatus using an overflow method includes a forming tank having a formed body inside, an annealing furnace provided below the formed body, and a cooling portion and a cutting unit provided below the annealing furnace. unit. This flat glass manufacturing device is made by melting molten glass from the top of the molded body and fusing it at its lower end to form flat glass (glass ribbon). This flat glass is passed through an annealing furnace to remove its internal strain and cooled to a room in a cooling chamber. After warming, the cutting section is cut to a predetermined size. [Prior Art Literature] [Patent Literature] [0007] Patent Literature 1: Japanese Patent Application Laid-Open No. 2012-197185
[發明概要] [發明所欲解決之課題] [0008] 上述的平板玻璃製造裝置是在配置於成形槽的上游側的玻璃熔解槽中，以熔融玻璃原料為熔融玻璃，將此熔融玻璃供應至下游側的成形槽。在熔解槽與成形槽之間，設有將熔融玻璃移送至成形槽用的玻璃供應路。此玻璃供應路是例如連接以白金等的金屬所構成的複數的玻璃供應管所成。 [0009] 藉玻璃供應路移送的熔融玻璃是例如成為1600℃以上的高溫。玻璃供應路為低溫時在供應路內熔融玻璃流動變得困難，或產生變質，因此在玻璃製造裝置的運作上，有事先將玻璃供應路預先加熱(預熱)的必要。此一場合中，將玻璃供應管以連結的狀態加熱時，會有因各玻璃供應管的膨脹，導致其連接部份有變形及損傷之虞。為此，玻璃供應路的加熱是以將各玻璃供應管分離進行為佳。 [0010] 此一場合中，由於玻璃供應管構成為筒狀，因此加熱中內部的熱會通過其開口部放射到外部而導致熱損失加大，而有不能有效進行預熱的問題。 [0011] 本發明是鑒於上述的情況所研創而成，以有效進行玻璃供應管的預熱為技術課題。 [用於解決課題的手段] [0012] 本發明是用於解決上述的課題，本發明的玻璃製造方法，具備：熔解玻璃原料生成熔融玻璃的熔解步驟；將上述熔融玻璃成形的成形步驟；及藉連結複數玻璃供應管所構成的玻璃供應路將上述熔融玻璃從熔解步驟朝成形步驟移送的玻璃供應步驟，其特徵為：進一步具備：在上述玻璃供應步驟之前，以預先將上述玻璃供應管分離的狀態通電加熱的預熱步驟，及在上述預熱步驟後，連接上述玻璃供應管構成上述玻璃供應路的玻璃供應路形成步驟，上述預熱步驟具備藉封閉構件封閉上述玻璃供應管之開口部的至少一部份的封閉步驟。 [0013] 如上述，在預熱步驟中，以藉封閉構件封閉玻璃供應管之開口部的至少一部份的狀態將該玻璃供應管通電加熱。因此，可盡可能降低通過開口部在玻璃供應管內的熱放射導致的熱損失，因此可有效執行玻璃供應管內的預熱。 [0014] 上述的玻璃製造方法中，上述封閉構件是以可撓耐熱性構件所構成為佳，例如可由耐熱纖維所成的毛氈所構成。不限於此，上述封閉構件是例如可藉耐火板等耐火性的板構件構成。藉此，可預熱步驟的封閉構件的操作變得容易。 [0015] 又，上述玻璃供應管具備：收容於殼體的筒狀的主體部，及形成在上述主體部的端部的突緣部，在上述封閉步驟中，上述封閉構件是以和上述突緣部接觸的狀態封閉上述玻璃供應管的上述開口部，並透過固定構件支撐於上述殼體為佳。 [0016] 根據上述，以殼體包覆玻璃供應管的主體部，並以封閉構件封閉玻璃供應管的開口部，藉此可將玻璃供應管有效地加熱。並且，透過固定構件將封閉構件支撐於殼體，可穩定地封閉開口部。 [0017] 上述預熱步驟是以耐火物包圍上述玻璃供應管的上述主體部的外圍面為佳。藉此，可降低玻璃供應管之來自主體部的外圍部的熱放射所導致的熱損失。因此，可更為有效率地執行玻璃供應管的預熱。 [0018] 又，本發明相關之玻璃供應管的預熱方法，其特徵為，具備：將複數玻璃供應管通電加熱的預熱步驟，及在預熱步驟後，連接上述玻璃供應管構成玻璃供應路的玻璃供應路形成步驟，上述預熱步驟具備藉封閉構件封閉上述玻璃供應管之開口部的至少一部份的封閉步驟。 [發明效果] [0019] 根據本發明，可有效進行玻璃供應管的預熱。[Summary of the Invention] [Problems to be Solved by the Invention] [0008] The above-mentioned flat glass manufacturing apparatus uses a molten glass raw material as a molten glass in a glass melting tank disposed upstream of a forming tank, and supplies the molten glass to Forming groove on the downstream side. A glass supply path for transferring molten glass to the forming tank is provided between the melting tank and the forming tank. This glass supply path is formed by connecting a plurality of glass supply tubes made of metal such as platinum. [0009] The molten glass transferred through the glass supply path has a high temperature of, for example, 1600 ° C or higher. When the glass supply path is at a low temperature, it becomes difficult to flow the molten glass in the supply path, or deterioration occurs. Therefore, it is necessary to preheat (preheat) the glass supply path in advance in the operation of the glass manufacturing apparatus. In this case, when the glass supply tubes are heated in a connected state, the glass supply tubes may be deformed and damaged due to expansion of the glass supply tubes. For this reason, the glass supply path is preferably heated by separating the glass supply tubes. [0010] In this case, since the glass supply pipe is formed in a cylindrical shape, the internal heat during heating is radiated to the outside through its opening, which causes an increase in heat loss, and there is a problem that preheating cannot be effectively performed. [0011] The present invention has been developed in view of the above-mentioned circumstances, and has as its technical objective the effective preheating of glass supply tubes. [Means for Solving the Problems] [0012] The present invention is to solve the above-mentioned problems. The glass manufacturing method of the present invention includes: a melting step of melting glass raw materials to produce molten glass; a forming step of forming the molten glass; and The glass supply step for transferring the molten glass from the melting step to the forming step by a glass supply path formed by connecting a plurality of glass supply tubes, further comprising: separating the glass supply tube in advance before the glass supply step. And a glass supply path forming step of connecting the glass supply tube to constitute the glass supply path after the preheating step, and the preheating step includes closing the opening of the glass supply tube by a sealing member. At least part of the closing step. [0013] As described above, in the preheating step, the glass supply tube is heated by being energized in a state where at least a part of the opening portion of the glass supply tube is closed by the closing member. Therefore, the heat loss due to the heat radiation in the glass supply tube through the opening can be reduced as much as possible, and thus the preheating in the glass supply tube can be effectively performed. [0014] In the glass manufacturing method described above, it is preferable that the closing member is made of a flexible heat-resistant member, and may be made of felt made of heat-resistant fiber, for example. It is not limited to this, For example, the said sealing member is comprised by the flame-resistant board member, such as a fire-resistant board. Thereby, the operation of the closing member in the preheating step becomes easy. [0015] The glass supply tube includes a cylindrical main body portion housed in a housing, and a flange portion formed at an end portion of the main body portion, and in the closing step, the closing member is formed with the protrusion. It is preferable that the edge portion is in contact with the opening portion of the glass supply tube and is supported by the housing through a fixing member. [0016] According to the above, by covering the main body portion of the glass supply tube with the housing and closing the opening portion of the glass supply tube with the closing member, the glass supply tube can be efficiently heated. In addition, the closing member is supported by the casing through the fixing member, and the opening can be closed stably. [0017] In the preheating step, it is preferable that the outer surface of the main body portion of the glass supply tube is surrounded by a refractory. Thereby, heat loss due to heat radiation from the peripheral portion of the main body portion of the glass supply tube can be reduced. Therefore, the preheating of the glass supply tube can be performed more efficiently. [0018] A method for preheating a glass supply tube according to the present invention includes a preheating step of heating a plurality of glass supply tubes with electricity, and after the preheating step, the glass supply tube is connected to form a glass supply. The glass supply path forming step of the channel, the preheating step includes a closing step of closing at least a part of the opening portion of the glass supply tube by a closing member. [Effects of the Invention] [0019] According to the present invention, preheating of the glass supply tube can be effectively performed.
[0021] 以下，針對實施本發明用的形態一邊參閱圖示一邊說明。第1圖至第6圖表示本發明相關之玻璃製造裝置及玻璃製造方法的第一實施形態。 [0022] 如第1圖表示，本實施形態有關的玻璃製造裝置是從上游側依序具備熔解槽1、澄清槽2、均質化槽3、狀態調整槽4、成形槽5及、連結各槽1~5的玻璃供應路6a~6d。另外，玻璃製造裝置具備進行藉成形槽5所成形的平板玻璃GR之除應變處理的退火爐(未圖示)及除應變處理後裁斷平板玻璃GR的裁斷裝置(未圖示)。 [0023] 熔解槽1是熔解投入的玻璃原料進行生成熔融玻璃GM的溶解步驟用的容器。熔解槽1是透過玻璃供應路6a與澄清槽2連接。澄清槽2是將從熔解槽1所供應的熔融玻璃GM利用澄清劑等的作用進行脫泡之澄清步驟用的容器。澄清槽2是透過玻璃供應路6b與均質化槽3連接。 [0024] 均質化槽3是藉著攪拌翼等攪拌澄清後的熔融玻璃GM，進行均一化之均質化步驟用的容器。均質化槽3是透過玻璃供應路6c與狀態調整閥4連接。狀態調整閥4是在將熔融玻璃GM適當成形後的狀態進行調整之狀態調整步驟用的容器。狀態調整槽4是透過玻璃供應路6d與成形槽5連接。 [0025] 成形槽5是將熔融玻璃GM成形為預定的形狀用的容器。本實施形態中，成形槽5是藉溢流下拉法將熔融玻璃GM成形為板狀。詳細而言，成形槽5是將剖面形狀(與第1圖的紙面正交的剖面形狀)形成大致錐形狀，在此成形槽5的上部形成有溢流槽(未圖示)。 [0026] 成形槽5是藉著玻璃供應路6d將熔融玻璃GM供應至溢流槽之後，使熔融玻璃GM從溢流槽溢出，沿著成形槽5兩側的側壁面(位於紙面的表背兩側的側面)流下。成形槽5是在側壁面的下端部將流下後的熔融玻璃GM融合，成形為平板玻璃GR。 [0027] 成形後的平板玻璃GR是例如厚度為0.01~ 10mm，利用於液晶顯示器或有機EL顯示器等的平板顯示器、有機EL照明、太陽能電池等的基板或保護罩。並且，成形槽5也可以執行狹縫下拉法等其他的下拉法。 [0028] 玻璃供應路6a~6d是進行將融熔玻璃GM從上游側的熔解槽1移送至下游側的成形槽5之玻璃供應步驟用的構成元件。如第2圖表示，玻璃供應路6a~6d是連結複數玻璃供應管7所成。構成玻璃供應路6a~6d的複數玻璃供應管7是透過絕緣構件8彼此連結。絕緣構件8是構成為在中央部具有開口部的環狀。 [0029] 如第3圖表示，玻璃供應路6a~6d可分離為各玻璃供應管7。玻璃供應管7是以白金或白金合金所構成。玻璃供應管7是被長形的殼體9所包覆。玻璃供應管7具備：移送熔融玻璃GM的長形的主體部10，及設置在主體部10的端部的通電加熱部11a、11b。 [0030] 主體部10雖構成為筒狀(例如圓筒狀)，但不限於此形狀。主體部10也可構成比殼體9長。因此，主體部10的各端部與殼體9從端部朝長方向突出。 [0031] 通電加熱部11a、11b包括：設置在主體部10的一端部的第一通電加熱部11a，及設置在主體部10的另一端部的第二通電加熱部11b。各通電加熱部11a、11b具有：包圍著主體部10端部的外圍面所構成的突緣部12，及一體構成於此突緣部12的上部的電極部13。各通電加熱部11a、11b是對電極部13施加預定的電壓將主體部10直接通電加熱。 [0032] 突緣部12雖是構成為圓板狀，但不限於此形狀。電極部13雖是從突緣部12的上部向上方突出的矩形的板部，但不限於此形狀。 [0033] 在突緣部12的表面(外面)設有冷卻部14。冷卻部14是以冷卻媒體可流通的配管所構成。冷卻部14是藉焊接的其他的手段，固定在突緣部12的表面。冷卻部14是以銅、鎳合金的其他的金屬所構成。冷卻部14具有配設於突緣部12的第一部份14a，及配設於電極部13的第二部份14b。 [0034] 第一部份14a是沿著構成圓板狀的突緣部12的緣部地構成為圓形。第二部份14b是沿著電極部13的長方向(上下方向)構成為直線狀。第二部份14b是包括朝第一部份14a供應冷卻媒體的流入部14c，及取出通過第一部份14a的冷卻媒體的排出部14d。並且，使用水、空氣與其他各種流體作為流通冷卻部14的冷卻媒體。 [0035] 殼體9是以鋼與其他金屬構成為圓筒體，但不限於此形狀。殼體9是收容包圍著玻璃供應管7之主體部10的外圍面所配設的耐火物(例如耐火磚)15。殼體9的內徑是設定成比玻璃供應管7的主體部10的外徑大。藉此，在殼體9與主體部10之間，形成可收容耐火磚15的空間。並且，殼體9是在配置有玻璃製造裝置之工廠等的建屋內，藉未圖示的架台等可變更位置地支撐。 [0036] 以下，針對使用上述構成的玻璃製造裝置製造平板玻璃GR的方法說明。 [0037] 本發明是以熔解槽1熔解原料玻璃(溶解步驟)，獲得熔融玻璃GM之後，對此熔融玻璃GM，依序實施藉澄清槽2的澄清步驟、藉均質化槽3的均質化步驟及藉狀態調整槽4的狀態調整步驟。隨後，將此熔融玻璃GM移送至成形槽5，藉成形槽5從熔融玻璃GM成形為平板玻璃GR(成形步驟)。熔融玻璃GM從熔解槽1到成形槽5為止，藉玻璃供應路6a~6d移動(玻璃供應步驟)。成形步驟後，藉退火爐除去平板玻璃GR的內部應變(徐冷步驟)。在徐冷步驟後，將平板玻璃GR裁斷成預定尺寸(裁斷步驟)，或捲繞成滾筒狀(捲繞步驟)。 [0038] 在執行如以上一連續的步驟時，有事先將玻璃供應路6a~6d及其他的構成元件1~5加熱的必要(預熱步驟)。預熱步驟是在將各玻璃供應路6a~6d分離為其構成元件之玻璃供應管7的狀態，對於各玻璃供應管7執行。 [0039] 以下，針對玻璃供應管7的預熱步驟(預熱方法)，一邊參閱第4圖至第6圖一邊詳細說明。預熱步驟具備：封閉玻璃供應管7之端部的開口部7a的步驟(封閉步驟)，及將玻璃供應管7加熱的步驟(加熱步驟)。 [0040] 封閉步驟是藉封閉構件16封閉玻璃供應管7的開口部7a。封閉構件16是例如以具有耐熱纖維所成的毛氈或耐火紙等的耐熱性及可撓變形性的構件所構成為佳。封閉構件16例如雖以氧化鋁纖維等的陶瓷纖維所構成，但不限於此構成。並且，封閉構件16可藉耐火板或耐火磚、具有其他耐熱性的板狀構件所構成。封閉構件16的形狀是可對應開口部7a形狀的形狀，例如可以和開口部7a的相似形。本實施形態中，封閉構件16是構成為具有圓形的主面的厚壁片狀。封閉構件16的直徑是比玻璃供應管7的開口部7a大，比冷卻部14的第一部份14a(圓形部份)的直徑小。藉此，封閉構件16不與冷卻部14接觸而接觸於突緣部12的表面(外面)。並且，封閉構件16的形狀不限於上述形狀，也可以是矩形、橢圓形等的形狀。 [0041] 封閉構件16是透過固定構件17支撐於殼體9。固定構件17是以具有耐熱性的線狀構件所構成。固定構件17是以對應主體部10等的膨脹而可伸縮的具有伸縮性的材質構成為佳。具體而言，作為固定構件17是例如可使用捻合陶瓷纖維的繩索等。殼體9具有卡止固定構件17的複數(圖例為四個)支撐部18。各支撐部18雖是從殼體9的外圍面突出的板部，但不限於此形狀。 [0042] 支撐部18具有卡止固定構件17的部份(卡止部)18a。固定構件17是以使封閉構件16與突緣部12接觸封閉主體部10的開口部7a的狀態，捲繞於該封閉構件16。固定構件17藉著與卡止部18a卡止，將封閉構件16固定在突緣部12。 [0043] 封閉步驟結束時，移行至加熱步驟。加熱步驟是對電極部13施加電壓，開始加熱。加熱步驟是使冷卻媒體流通於冷卻部14，一邊冷卻各通電加熱部11a、11b，並一邊將主體部10加熱。在將封閉構件16加熱至足以移送熔融玻璃GM的溫度為止之後，從玻璃供應管7卸下。將卸下封閉構件16後的玻璃供應管7與其他的玻璃供應管7連接。藉連接複數的玻璃供應管7，構成玻璃供應路6a~6d (玻璃供應路形成步驟)。並且，玻璃供應路形成步驟是以使連接的玻璃供應管7的各開口部7a彼此相對地預先鄰接的狀態安裝封閉構件16，立即連接各玻璃供應管7為佳。根據如以上的連接方法，可一邊高溫地維持各玻璃供應管7一邊形成玻璃供應路6a~6d。 [0044] 隨後，將玻璃供應路6a~6d連接於對應的其他的構成元件1~5，組裝玻璃製造裝置(玻璃製造裝置的組裝步驟)。並且，除了玻璃供應路6a~6d之外的其他構成元件1~5，在主要處設有通電加熱部。對各構成元件1~5與玻璃供應管7的預熱同時期，執行藉通電加熱部的加熱步驟。 [0045] 之後，執行已說明的熔解步驟、澄清步驟、均質化步驟、狀態調整步驟及成形步驟等，製造平板玻璃GR。 [0046] 以上說明之本實施形態相關的玻璃製造方法(玻璃供應管7的預熱方法)是在預熱步驟中，藉封閉構件16封閉玻璃供應管7的開口部7a，從外部遮蔽主體部10內。藉此，可盡可能降低主體部10的熱從內部通過開口部7a放射到外部所導致的熱損失。藉此，可有效進行玻璃供應管7的預熱。 [0047] 又，封閉構件16是不與各通電加熱部11a、11b的冷卻部14接觸，固定於突緣部12。因此，封閉構件16與冷卻部14接觸可防止將該冷卻部14過剩地加熱。 [0048] 第7圖及第8圖是表示本發明的第二實施形態。上述的第一實施形態中，封閉構件16雖構成為圓板狀，但本實施形態是構成為矩形。封閉構件16的尺寸是設定比冷卻部14的第一部份14a的直徑大。因此，封閉構件16與第一實施形態比較，以更廣範圍包覆各通電加熱部11a、11b。藉此，防止從玻璃供應管7(主體部10)的開口部7a的熱放射，並也可阻止從突緣部12的表面的熱放射。藉此，可有效進行玻璃供應管7的預熱。 [0049] 第9圖及第10圖是表示本發明的第三實施形態。本實施形態中，封閉構件16是具有與玻璃供應管7的開口部7a的開口面積大致相同面積的圓形的板構件或塊材。將封閉構件16***玻璃供應管7的開口部7a封閉該開口部7a。此時，封閉構件16由於被保持在玻璃供應管的開口部7a的內面，因此不需要第一實施形態例示的固定構件17及殼體9的支撐部18。 [0050] 並且，本發明不限於上述實施形態的構成，也不限於上述的作用效果。本發明在不脫離本發明的主旨範圍可進行種種的變更。 [0051] 上述的實施形態中，雖表示以封閉構件16封閉玻璃供應路6a~6d的玻璃供應管7的開口部7a的例，但不限於此。也可以在玻璃製造裝置之其他的構成元件，即熔解槽1、澄清槽2、均質槽3、狀態調整槽4、成形槽5中，具有移送熔融玻璃GM的功能，將該等視為玻璃供應管7。 [0052] 例如，在澄清槽2設有排出藉熔融玻璃GM的脫泡處理產生之氣體的頭部。本發明在預熱步驟的實施時，以外加澄清槽2之熔融玻璃GM的流出入有關的開口部，藉封閉構件16封閉頭部的開口部為佳。如上述，藉封閉構件16封閉有預熱必要之構成元件的開口部，藉此可效率良好地實施預熱步驟。 [0053] 上述的實施形態中，雖表示將封閉構件16以線狀的固定構件17固定在通電加熱之加熱部11a、11b的突緣部12的例，但不限於此構成。例如也可藉夾具的其他固定手段將封閉構件16固定在突緣部12。 [0054] 上述的實施形態中，雖表示以製造平板玻璃，及將平板玻璃捲繞成滾筒狀所構成的玻璃滾筒的製造方法作為玻璃製造方法，但不限於此。本發明也可運用在玻璃管，玻璃塊的其他的各種玻璃製品的方法。 [0055] 上述的實施形態中，雖表示以封閉構件16封閉玻璃供應管7的開口部7a的全部的例，但不限於此，也可封閉開口部7a的一部份進行預熱步驟。亦即，藉封閉構件16封閉開口部7a的一部份的場合，也可在開口部7a產生若干的間隙。[0021] Hereinafter, the embodiments for carrying out the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment of a glass manufacturing apparatus and a glass manufacturing method according to the present invention. [0022] As shown in FIG. 1, the glass manufacturing apparatus according to the present embodiment includes a melting tank 1, a clarification tank 2, a homogenization tank 3, a state adjustment tank 4, a forming tank 5, and a connection tank in order from the upstream side. 1 ~ 5 glass supply channels 6a ~ 6d. In addition, the glass manufacturing apparatus includes an annealing furnace (not shown) that performs strain-removing treatment of the flat glass GR formed by the forming tank 5 and a cutting device (not shown) that cuts the flat-glass glass after the strain-removing treatment. [0023] The melting tank 1 is a container for melting the input glass raw material and performing a dissolving step to generate molten glass GM. The melting tank 1 is connected to the clarification tank 2 through the glass supply path 6a. The clarification tank 2 is a container for a clarification step of defoaming the molten glass GM supplied from the melting tank 1 by the action of a clarifier or the like. The clarification tank 2 is connected to the homogenization tank 3 through the glass supply path 6b. [0024] The homogenization tank 3 is a container for performing the homogenization and homogenization step by stirring the clarified molten glass GM with a stirring blade or the like. The homogenization tank 3 is connected to the state adjustment valve 4 through the glass supply path 6c. The state adjustment valve 4 is a container for a state adjustment step for adjusting a state after the molten glass GM is appropriately formed. The state adjustment tank 4 is connected to the forming tank 5 through the glass supply path 6d. [0025] The forming tank 5 is a container for forming molten glass GM into a predetermined shape. In the present embodiment, the forming tank 5 is configured to form the molten glass GM into a plate shape by an overflow down-draw method. Specifically, the forming groove 5 has a substantially tapered cross-sectional shape (a cross-sectional shape orthogonal to the paper surface in FIG. 1), and an overflow groove (not shown) is formed on the upper portion of the forming groove 5. [0026] The forming tank 5 is after the molten glass GM is supplied to the overflow tank through the glass supply path 6d, and the molten glass GM overflows from the overflow tank, along the side wall surfaces (located on the front and back sides of the paper surface) of the forming tank 5 Sides on both sides). The shaping | molding tank 5 fuse | melts the molten glass GM which flowed down at the lower end part of a side wall surface, and shapes into flat glass GR. [0027] The formed flat glass GR is, for example, a substrate having a thickness of 0.01 to 10 mm and used for a flat panel display such as a liquid crystal display or an organic EL display, an organic EL lighting, or a solar cell, or a protective cover. Further, the forming groove 5 may perform another down-drawing method such as a slit down-drawing method. [0028] The glass supply paths 6a to 6d are constituent elements for performing a glass supply step for transferring the molten glass GM from the melting tank 1 on the upstream side to the forming tank 5 on the downstream side. As shown in FIG. 2, the glass supply channels 6 a to 6 d are formed by connecting a plurality of glass supply tubes 7. The plurality of glass supply tubes 7 constituting the glass supply paths 6 a to 6 d are connected to each other through an insulating member 8. The insulating member 8 is formed in a ring shape having an opening in a central portion. [0029] As shown in FIG. 3, the glass supply channels 6 a to 6 d can be separated into glass supply tubes 7. The glass supply pipe 7 is made of platinum or platinum alloy. The glass supply tube 7 is covered by an elongated case 9. The glass supply tube 7 includes an elongated body portion 10 that transfers molten glass GM, and energized heating portions 11 a and 11 b provided at ends of the body portion 10. [0030] Although the main body portion 10 is configured in a cylindrical shape (for example, a cylindrical shape), it is not limited to this shape. The main body portion 10 may be longer than the case 9. Therefore, each end portion of the main body portion 10 and the case 9 protrude from the end portion in the longitudinal direction. [0031] The energized heating sections 11 a and 11 b include a first energized heating section 11 a provided at one end of the main body section 10 and a second energized heating section 11 b provided at the other end of the main body section 10. Each of the electrified heating portions 11 a and 11 b includes a flange portion 12 formed on a peripheral surface surrounding an end portion of the main body portion 10, and an electrode portion 13 integrally formed on the flange portion 12. Each of the energization heating sections 11 a and 11 b applies a predetermined voltage to the electrode section 13 to directly energize and heat the main body section 10. [0032] Although the flange portion 12 is formed in a disc shape, it is not limited to this shape. The electrode portion 13 is a rectangular plate portion that protrudes upward from the upper portion of the flange portion 12, but is not limited to this shape. [0033] A cooling portion 14 is provided on the surface (outside) of the flange portion 12. The cooling section 14 is constituted by a pipe through which a cooling medium can flow. The cooling portion 14 is fixed to the surface of the flange portion 12 by other means by welding. The cooling section 14 is made of other metals such as copper and nickel alloys. The cooling portion 14 has a first portion 14 a disposed on the flange portion 12 and a second portion 14 b disposed on the electrode portion 13. [0034] The first portion 14a is formed in a circular shape along the edge portion constituting the disc-shaped flange portion 12. The second portion 14 b is linearly formed along the longitudinal direction (up and down direction) of the electrode portion 13. The second portion 14b includes an inflow portion 14c that supplies a cooling medium to the first portion 14a, and a discharge portion 14d that takes out the cooling medium that has passed through the first portion 14a. In addition, water, air, and various other fluids are used as a cooling medium for the cooling section 14. [0035] The housing 9 is a cylindrical body made of steel and other metals, but is not limited to this shape. The case 9 is a refractory (for example, a refractory brick) 15 disposed on the outer peripheral surface of the main body portion 10 surrounding the glass supply tube 7. The inner diameter of the case 9 is set larger than the outer diameter of the main body portion 10 of the glass supply tube 7. Thereby, a space in which the refractory brick 15 can be accommodated is formed between the case 9 and the main body portion 10. In addition, the housing 9 is supported in a building or the like in which a glass manufacturing apparatus is arranged, and can be changed in position by a stand (not shown). [0036] Hereinafter, a method for manufacturing the flat glass GR using the glass manufacturing apparatus configured as described above will be described. [0037] In the present invention, the raw glass is melted in the melting tank 1 (dissolution step). After obtaining the molten glass GM, the molten glass GM is sequentially subjected to the clarification step by the clarification tank 2 and the homogenization step by the homogenization tank 3. And the state adjustment step of the state adjustment slot 4. Subsequently, the molten glass GM is transferred to the forming tank 5, and the molten glass GM is formed into the flat glass GR by the forming tank 5 (forming step). The molten glass GM moves from the melting tank 1 to the forming tank 5 through the glass supply paths 6a to 6d (glass supply step). After the forming step, the internal strain of the sheet glass GR is removed by an annealing furnace (slow cooling step). After the spin-cooling step, the flat glass GR is cut into a predetermined size (cutting step) or wound into a roll shape (winding step). [0038] When performing the above continuous steps, it is necessary to heat the glass supply paths 6a to 6d and other constituent elements 1 to 5 in advance (preheating step). The preheating step is performed for each glass supply pipe 7 in a state where the glass supply channels 6a to 6d are separated into the glass supply pipes 7 constituting the components. [0039] Hereinafter, the preheating step (preheating method) of the glass supply tube 7 will be described in detail with reference to FIGS. 4 to 6. The preheating step includes a step of closing the opening portion 7 a at the end portion of the glass supply tube 7 (the closing step), and a step of heating the glass supply tube 7 (the heating step). [0040] The closing step is to close the opening portion 7a of the glass supply pipe 7 by the closing member 16. The closing member 16 is preferably constituted by a member having heat resistance and flexible deformability such as a felt made of heat-resistant fibers or a fireproof paper. The closing member 16 is made of, for example, ceramic fibers such as alumina fibers, but is not limited to this structure. Further, the closing member 16 may be constituted by a refractory plate, a refractory brick, or a plate-like member having other heat resistance. The shape of the closing member 16 is a shape that can correspond to the shape of the opening 7a, and can be similar to that of the opening 7a, for example. In this embodiment, the closing member 16 is formed in a thick-walled sheet shape having a circular main surface. The diameter of the closing member 16 is larger than the opening portion 7 a of the glass supply tube 7 and smaller than the diameter of the first portion 14 a (circular portion) of the cooling portion 14. Thereby, the sealing member 16 is in contact with the surface (outer surface) of the flange portion 12 without being in contact with the cooling portion 14. In addition, the shape of the closing member 16 is not limited to the above-mentioned shape, and may be a shape such as a rectangle or an ellipse. [0041] The closing member 16 is supported by the case 9 through the fixing member 17. The fixing member 17 is a linear member having heat resistance. The fixing member 17 is preferably made of a stretchable material that is expandable and contractible in accordance with the expansion of the body portion 10 and the like. Specifically, as the fixing member 17, for example, a rope or the like in which ceramic fibers are twisted can be used. The case 9 includes a plurality of (four in the example of the drawing) support portions 18 that lock the fixing member 17. Although each support part 18 is a plate part which protrudes from the outer peripheral surface of the case 9, it is not limited to this shape. [0042] The support portion 18 includes a portion (the locking portion) 18a that locks the fixing member 17. The fixing member 17 is wound around the closing member 16 in a state where the closing member 16 and the flange portion 12 contact the opening portion 7 a of the main body portion 10. The fixing member 17 is fixed to the flange portion 12 by being locked with the locking portion 18 a. [0043] At the end of the closing step, proceed to the heating step. In the heating step, a voltage is applied to the electrode portion 13 and heating is started. In the heating step, a cooling medium is caused to flow through the cooling section 14, and each of the current heating sections 11 a and 11 b is cooled, and the main body section 10 is heated. After the closing member 16 is heated to a temperature sufficient to transfer the molten glass GM, it is removed from the glass supply pipe 7. The glass supply pipe 7 after the closing member 16 is removed is connected to another glass supply pipe 7. A plurality of glass supply pipes 7 are connected to form glass supply paths 6a to 6d (glass supply path forming step). In addition, in the glass supply path forming step, it is preferable to attach the closing member 16 in a state where the respective openings 7a of the connected glass supply tubes 7 are adjacent to each other in advance, and to connect the glass supply tubes 7 immediately. According to the connection method described above, the glass supply channels 6a to 6d can be formed while maintaining the glass supply tubes 7 at a high temperature. [0044] Subsequently, the glass supply paths 6a to 6d are connected to corresponding other constituent elements 1 to 5 to assemble a glass manufacturing apparatus (assembly steps of the glass manufacturing apparatus). In addition, the other constituent elements 1 to 5 other than the glass supply paths 6a to 6d are provided with an energized heating section at a main portion. At the same time as the preheating of each of the constituent elements 1 to 5 and the glass supply tube 7, a heating step of the heating section by electric current is performed. [0045] Thereafter, the melting step, the clarification step, the homogenization step, the state adjustment step, the forming step, and the like described above are performed to produce a flat glass GR. [0046] In the glass manufacturing method (preheating method of the glass supply tube 7) described in the above embodiment, in the preheating step, the opening portion 7a of the glass supply tube 7 is closed by the closing member 16 to shield the main body portion from the outside. Within 10. This makes it possible to reduce as much as possible the heat loss caused by the heat radiated from the inside of the main body portion 10 to the outside through the opening portion 7a. Thereby, preheating of the glass supply pipe 7 can be performed efficiently. [0047] The closing member 16 is fixed to the flange portion 12 without contacting the cooling portion 14 of each of the energized heating portions 11a and 11b. Therefore, contact of the closing member 16 with the cooling portion 14 can prevent the cooling portion 14 from being excessively heated. [0048] FIGS. 7 and 8 show a second embodiment of the present invention. In the first embodiment described above, although the closing member 16 is configured in a disc shape, this embodiment is configured in a rectangular shape. The size of the closing member 16 is set larger than the diameter of the first portion 14 a of the cooling portion 14. Therefore, compared with the first embodiment, the closing member 16 covers the energized heating sections 11 a and 11 b in a wider range. This prevents heat radiation from the opening portion 7 a of the glass supply tube 7 (main body portion 10), and also prevents heat radiation from the surface of the flange portion 12. Thereby, preheating of the glass supply pipe 7 can be performed efficiently. [0049] FIGS. 9 and 10 show a third embodiment of the present invention. In the present embodiment, the closing member 16 is a circular plate member or a block having a substantially same area as the opening area of the opening portion 7 a of the glass supply tube 7. The closing member 16 is inserted into the opening portion 7 a of the glass supply tube 7 to close the opening portion 7 a. At this time, since the closing member 16 is held on the inner surface of the opening portion 7a of the glass supply tube, the fixing member 17 and the support portion 18 of the housing 9 illustrated in the first embodiment are not necessary. [0050] Furthermore, the present invention is not limited to the configuration of the above-mentioned embodiment, nor is it limited to the above-mentioned effects. The present invention can be modified in various ways without departing from the gist of the present invention. [0051] In the above-mentioned embodiment, the example in which the opening portion 7a of the glass supply tube 7 of the glass supply channels 6a to 6d is closed by the closing member 16 is shown, but it is not limited to this. The other components of the glass manufacturing apparatus, that is, the melting tank 1, the clarification tank 2, the homogenization tank 3, the condition adjustment tank 4, and the forming tank 5, may have a function of transferring the molten glass GM, and this may be regarded as glass supply Tube 7. [0052] For example, the clarification tank 2 is provided with a head for discharging the gas generated by the defoaming treatment of the molten glass GM. In the implementation of the preheating step of the present invention, it is preferable that the opening of the molten glass GM in the clarification tank 2 is added to the relevant opening, and the opening of the head is closed by the closing member 16. As described above, the preheating step can be efficiently performed by closing the openings of the constituent elements necessary for preheating by the closing member 16. [0053] In the above-mentioned embodiment, the example in which the closing member 16 is fixed to the flange portions 12 of the heating portions 11a and 11b heated by the electric current by the linear fixing members 17 is not limited to this configuration. For example, the closing member 16 may be fixed to the flange portion 12 by other fixing means of a clamp. [0054] In the above-mentioned embodiment, although the manufacturing method of the glass drum which manufactures flat glass and rolls flat glass into a roll shape is shown as a glass manufacturing method, it is not limited to this. The present invention can also be applied to various other glass products such as glass tubes and glass blocks. [0055] In the above-mentioned embodiment, although the example in which the entire opening portion 7a of the glass supply tube 7 is closed by the closing member 16 is shown, it is not limited to this, and a part of the opening portion 7a may be closed to perform a preheating step. That is, when a part of the opening portion 7 a is closed by the closing member 16, some gaps may be generated in the opening portion 7 a.
[0056][0056]
6a‧‧‧玻璃供應路6a‧‧‧Glass Supply Road
6b‧‧‧玻璃供應路6b‧‧‧Glass Supply Road
6c‧‧‧玻璃供應路6c‧‧‧Glass Supply Road
6d‧‧‧玻璃供應路6d‧‧‧Glass Supply Road
7‧‧‧玻璃供應管7‧‧‧ glass supply tube
7a‧‧‧開口部7a‧‧‧ opening
9‧‧‧殼體9‧‧‧shell
10‧‧‧主體部10‧‧‧Main body
12‧‧‧突緣部12‧‧‧ protruding edge
16‧‧‧封閉構件16‧‧‧ closed member
17‧‧‧固定構件17‧‧‧Fixed components
GM‧‧‧熔融玻璃GM‧‧‧ Molten Glass
GR‧‧‧平板玻璃GR‧‧‧ flat glass
[0020] 第1圖為第一實施形態相關之玻璃製造裝置的側視圖。 第2圖表示玻璃供應路之一部份的側視圖。 第3圖表示將玻璃供應路分離成各玻璃供應管的狀態的側視圖。 第4圖表示玻璃製造方法之一步驟的玻璃供應管的透視圖。 第5圖表示玻璃製造方法之一步驟的玻璃供應管的側視圖。 第6圖表示玻璃製造方法之一步驟的玻璃供應管的前視圖。 第7圖表示第二實施形態相關的玻璃製造方法之一步驟的玻璃供應管的側視圖。 第8圖表示玻璃製造方法之一步驟的玻璃供應管的前視圖。 第9圖表示第三實施形態相關的玻璃製造方法之一步驟的玻璃供應管的側視圖。 第10圖表示玻璃製造方法之一步驟的玻璃供應管的前視圖。[0020] Fig. 1 is a side view of a glass manufacturing apparatus according to a first embodiment. Figure 2 shows a side view of a part of the glass supply path. Fig. 3 is a side view showing a state where the glass supply path is separated into each glass supply tube. Fig. 4 is a perspective view of a glass supply tube as a step in a glass manufacturing method. Fig. 5 is a side view of a glass supply tube as a step in a glass manufacturing method. Fig. 6 is a front view of a glass supply tube as a step in a glass manufacturing method. Fig. 7 is a side view of a glass supply tube as a step in the glass manufacturing method according to the second embodiment. Fig. 8 is a front view of a glass supply tube as a step in a glass manufacturing method. Fig. 9 is a side view of a glass supply tube as a step in the glass manufacturing method according to the third embodiment. Fig. 10 is a front view of a glass supply tube as a step in a glass manufacturing method.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-024254 | 2017-02-13 | ||
| JP2017024254A JP6724813B2 (en) | 2017-02-13 | 2017-02-13 | Glass manufacturing method and glass feed pipe preheating method |
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| Publication Number | Publication Date |
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| TW201829327A true TW201829327A (en) | 2018-08-16 |
| TWI727124B TWI727124B (en) | 2021-05-11 |
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| TW106142650A TWI727124B (en) | 2017-02-13 | 2017-12-06 | Glass manufacturing method and preheating method of glass supply pipe |
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| JP (1) | JP6724813B2 (en) |
| KR (1) | KR102331496B1 (en) |
| CN (1) | CN110291048B (en) |
| TW (1) | TWI727124B (en) |
| WO (1) | WO2018146908A1 (en) |
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| JP7479357B2 (en) * | 2018-09-27 | 2024-05-08 | コーニング インコーポレイテッド | Glass manufacturing equipment electrical flange support assembly |
| KR20210064347A (en) * | 2018-09-27 | 2021-06-02 | 코닝 인코포레이티드 | Glass forming apparatuses including modular glass clarification systems |
| US11919800B2 (en) | 2018-09-27 | 2024-03-05 | Corning Incorporated | Modular molten glass delivery apparatus |
| JP7136015B2 (en) * | 2019-06-17 | 2022-09-13 | 日本電気硝子株式会社 | glass transfer device |
| WO2024038740A1 (en) * | 2022-08-19 | 2024-02-22 | 日本電気硝子株式会社 | Method for manufacturing glass article, and device for manufacturing glass article |
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| JP4711171B2 (en) * | 2004-12-28 | 2011-06-29 | 日本電気硝子株式会社 | Sheet glass manufacturing apparatus and sheet glass manufacturing method |
| US8196434B2 (en) * | 2007-08-08 | 2012-06-12 | Corning Incorporated | Molten glass delivery apparatus for optical quality glass |
| JP5656080B2 (en) | 2010-03-23 | 2015-01-21 | 日本電気硝子株式会社 | Manufacturing method of glass substrate |
| CN103183463B (en) * | 2011-03-31 | 2017-08-01 | 安瀚视特控股株式会社 | The manufacture method of glass substrate and the manufacture device of glass substrate |
| JP5731438B2 (en) * | 2012-04-06 | 2015-06-10 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass plate manufacturing method and manufacturing apparatus |
| JP5752647B2 (en) * | 2012-06-29 | 2015-07-22 | ＡｖａｎＳｔｒａｔｅ株式会社 | Manufacturing method of glass substrate |
| JP2014019629A (en) * | 2012-07-20 | 2014-02-03 | Nippon Electric Glass Co Ltd | Glass plate manufacturing apparatus and its assembly method |
| JP5976863B2 (en) * | 2014-03-31 | 2016-08-24 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass substrate manufacturing method and glass substrate manufacturing apparatus |
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- 2017-11-24 WO PCT/JP2017/042273 patent/WO2018146908A1/en active Application Filing
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| TWI727124B (en) | 2021-05-11 |
| KR102331496B1 (en) | 2021-11-26 |
| JP6724813B2 (en) | 2020-07-15 |
| KR20190113755A (en) | 2019-10-08 |
| CN110291048B (en) | 2021-07-06 |
| WO2018146908A1 (en) | 2018-08-16 |
| CN110291048A (en) | 2019-09-27 |
| JP2018131345A (en) | 2018-08-23 |
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