201109284 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種製造FPD(Flat Panel Display，平板顯 示器）用之玻璃基板之玻璃製造裝置及玻璃製造方法，尤 其係關於一種製造無驗玻璃製之液晶顯示器用之玻璃基板 的玻璃製造裝置及玻璃製造方法。 【先前技術】 作為製造FPD用之玻璃基板之製法，已知有浮式法之製 造方法。利用浮式法之玻璃製造裝置包括熔解槽、減壓消 泡裝置、熔融金屬浴（金屬液槽）、緩冷爐、及切割裝置。 於溶解槽中熔融之熔融玻璃被供給至減壓消泡裝置中，並 於此處進行減壓消泡處理後，經由搬送管而流入至金屬液 槽中。金屬液槽中充滿熔融錫，流入至金屬液槽中之熔融 玻璃係於熔融錫液上流鑄而成為特定厚度並且得以平坦 化° 另一方面，專利文獻丨所揭示之玻璃製造裝置包括熔解 槽、授拌罐、管狀給料H、成形用料q，於授掉罐 中，配置有授拌該攪拌罐内之炼融玻璃之搜掉器，並且於 搜掉罐之底部設置有排流管，該排流管係排出積存於授拌 罐之底部之異質之熔融玻璃。根據該玻璃製造裝置於熔 解槽中炼融玻璃原料而作為炫融玻璃，使該熔融玻璃自熔 解槽流人至攪拌罐中。而且，於_罐内利用授拌器授掉 藉：提高熔融玻璃之均質性，其後-面調整溫 度-面經由管狀給料器使熔融玻璃流入至成形用罐卜 149807.doc 201109284 先前技術文獻 專利文獻 專利文獻1 :曰本專利特開2007·161566號公報 【發明内容】 發明所欲解決之問題 攪拌罐之底部積存有異質之熔融玻璃，其為主要含有大 3：氧化锆之熔融玻璃，氧化锆係因高溫之熔融玻璃而自熔 解槽之耐火碑熔出者。自耐火碑熔出之氧化锆係耐火磚越 成為高溫越容易熔出為熔融玻璃。因此’由於無鹼玻璃之 熔融玻璃之溫度較鹼性玻璃之熔融玻璃之溫度更高，故就 氧化鍅之含量而言，無鹼玻璃之熔融玻璃中更多。熔解槽 中鹼性玻璃之熔融玻璃之溫度約為12〇〇〜14〇〇。匸，同一熔 解槽中無鹼玻璃之熔融玻璃之溫度約為15〇〇〜165〇<t。 為了製造出高品質之玻璃基板，必需將主要含有大量氧 化鍅之熔融玻璃自攪拌罐排出，於此情形時，將鉑或鉑合 金製排流管電熱加熱至熔融玻璃之溫度附近為止，即，藉 由加熱排流管而控制排流管内之熔融破璃之黏度，將主要 含有大量氧化錯之炼融玻璃自㈣罐經由排流管排出 部。 若對相對於溫度之黏度特性進行說明，則驗性玻璃之黏 度具有伴隨溫度上升而緩慢下降之特性，而無驗玻璃之黏 度具有於特定之小幅溫度範圍内急遽下降之特性。因此， 於㈣之無驗玻璃中，，難以僅以排流管之溫度微調整來自 排流管之排出流量…如圖4般’連結於攪拌罐丨之底部 149807.doc 201109284 之先前排流管2之形狀設為直管（參照專利文⑴之圖 流管嘴4)形狀。因此可認為，將排流管之溫度設定為 持炼融玻璃之溫度，並且於排流管之出口一體地形成管 藉由利用该管口限制排出量而微調整排出量。 >然而’右於排流管設置管σ，則存在以下問題：因排流 管内之高溫之熔融玻璃而使管口劣化或破損，管口之排I 之口&變大’因此無法微調整炫融玻璃之排出量，從而 導致所製造之玻璃板之品質下降。即，由於供給至浮式去 成形裝置之溶融玻璃中，含有主要含有大量氧化錯之炼融 玻璃即異質之炼融玻璃，又，若熔融玻璃之排出量不必要 地增大而直至排出品f良好之溶融玻璃為止，則玻璃板之 生產性會下降。為了解決該問題，必需更換整個排流管， 因於排流管《更換時要停止玻璃板之生產，故存在玻璃板 之生產性下降之缺點。 又，於更換為口徑不同之管口而欲使排出量最佳化之情 形時，亦必需更換整個排流管，因此於此情形時亦存在玻 璃板之生產性下降之缺點。 本發明係鑒於上述情形而完成者，其目的在於提供一種 可實現玻璃之品質提高及生產性提高之玻璃製造裝置及玻 璃製造方法。 解決問題之技術手段 為了達到上述目的，本發明提供一種玻璃製造裝置，其 係於暫時性地收容熔融玻璃之容器冬底部或搬送熔融玻璃 之搬送管之底部，設置有用於排出熔融玻璃之排流管，其 149807.doc 201109284 特徵在於.上述排流管包括：排 器之底部或上述搬送管 …係連結於上述容 σ σΡ並且包含加埶機椹其 口，其係裝卸自如地設置於 …、機構，及e 徘出官之下部。 根據本發明，將作為 其下部之管口設為分離結構:：=之排出管與設置於 裝管口。於藉由排流管排出異==裝卸自如地安 由電熱加熱裝置等加熱機構將排出管 之“時’藉 ㈣出管内之、_璃排：=二熱至特定之溫度， 热 出時保持良好之黏度，於此狀 釔下，熔融玻璃自管口之排出 、 非出口排出。而且，於管口劣化 或破知而更換管口之情形時， 、^ 汉於更換為口徑不同之管口 以使管口最佳化之情形時，僅將管口 ^ ^ 备 排出S卸除而更換 為新的官口。藉此，管口之 I侍谷易，且可於短 時3内完成，因而不會對所製造之玻璃之品質造成影響， 且無需停止玻璃製造裝置即可進行更換作業，因此玻璃之 生產性提高。 2 ’本發明中’收容於上述容器之溶融玻璃或由上述搬 送管搬送之熔融玻璃之溫度宜為1350〜1450<t，自上述排 流管排出之熔融玻璃之溫度宜為1200〜1400<t，上述熔融 玻璃係將該熔融玻璃之黏度設為WdPa.s]時，1〇训=2時之 溫度宜為超過146CTC且為175(TC以下。根據本發明，可穩 定地排出異質之熔融玻璃。 又’本發明之上述排出管宜為鉑或鉑合金製，厚度為 0.3〜2 mm，長度為200〜800 mm，内徑為20〜80 mm，並藉 由上述加熱機構加熱至1050〜135(TC ;且上述管口宜為始 149807.doc 201109284 或鉑合金製，排出口之口徑為3〜7〇 穩定地僅排出異質之熔融玻璃。 mm。根據本發明 可 又， 發明， 度，藉 本發明以於上述管口設置加熱機構為更佳。根據本 藉由加熱機構將管口加熱至與排出管之溫度相同程 此可穩定地僅排出異質之熔融玻璃。 广本發明之上述排出管宜為裳卸自如地連結於上述容 态之底部或上述搬送管之底部。根據本發明，於排出管破 損之情形時，可容易地更換為新的排出管。 為了達到上述㈣，本發明提,供一種玻璃製造方法，其 特徵在於使用本發明之玻璃製造裝置製造玻璃。藉此，根 據本發明之玻璃製造方法，可實現所製造之玻璃之品質提 高及生產性提高。 發明之效果 如以上說明般，根據本發明之玻璃製造裝置及玻璃製造 方法，由於將排流管之排出管與管口設為分離結構，故而 s 口可更換，從而可實現所製造之玻璃之品質提高及生產 性提高。 【實施方式】 以下，按照隨附圖式對本發明之玻璃製造裝置及玻璃製 造方法之較佳實施形態進行說明。 圖1係表示本發明之玻璃製造裝置之實施形態之概略剖 面圖°該玻璃之製造裝置包括：熔解槽20,其係熔解玻璃 原料並收容熔融玻璃G ;及減壓消泡裝置1〇，其係對熔融 玻璃G進行減壓消泡處理並減壓抽吸熔融玻璃〇中之氣 149807.doc 201109284 泡。 再者’實施形態之玻璃原料為實質上不含有適合於 LCD(Liquid Crystal Display，液晶顯示器）用玻璃基板之鹼 金屬氧化物的玻璃原料，但並不限定於該玻璃厚料，亦可 為含有適合於PDP(Plasma Display Panel，電衆顯示器）用 玻璃基板之驗金屬氧化物之玻璃原料（驗石灰玻璃）。 無驗玻璃之組成（由質量百分率表示之組成）為： SiO2:50.0〜66.0%、A12〇3:10.5〜22.0%、B2O3:0〜12.0%、BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass manufacturing apparatus and a glass manufacturing method for manufacturing a glass substrate for an FPD (Flat Panel Display), and more particularly to a manufacturing method without glass. A glass manufacturing apparatus and a glass manufacturing method for a glass substrate for a liquid crystal display. [Prior Art] As a method of producing a glass substrate for FPD, a method of producing a floating method is known. The glass manufacturing apparatus using the floating method includes a melting tank, a reduced pressure defoaming device, a molten metal bath (metal liquid tank), a slow cooling furnace, and a cutting device. The molten glass melted in the dissolution tank is supplied to a vacuum defoaming device, and is subjected to a reduced pressure defoaming treatment, and then flows into the molten metal tank through the transfer pipe. The metal liquid tank is filled with molten tin, and the molten glass which flows into the molten metal tank is casted on the molten tin liquid to have a specific thickness and is flattened. On the other hand, the glass manufacturing apparatus disclosed in the patent document includes a melting tank, a mixing tank, a tubular feeding material H, a forming material q, in the dispensing tank, a retractor for mixing the smelting glass in the stirring tank, and a drain pipe at the bottom of the collecting tank, The drainage pipe discharges the heterogeneous molten glass accumulated at the bottom of the mixing tank. According to the glass manufacturing apparatus, the glass raw material is smelted in the melting tank as a glazing glass, and the molten glass is flowed from the melting tank to the stirring tank. Moreover, in the tank, the mixer is used to increase the homogeneity of the molten glass, and the rear-side adjustment temperature-surface allows the molten glass to flow into the forming tank via the tubular feeder. 149807.doc 201109284 Patent of the prior art SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION A molten glass having a heterogeneous structure containing a large 3: zirconia molten glass is oxidized at the bottom of the stirred tank. Zirconium is a refractory monument from the melting tank due to the high temperature molten glass. The zirconia-based refractory bricks which are fused from the refractory monument are more likely to be melted into molten glass as the temperature is increased. Therefore, since the temperature of the molten glass of the alkali-free glass is higher than the temperature of the molten glass of the alkali glass, the amount of the cerium oxide is more in the molten glass of the alkali-free glass. The temperature of the molten glass of the alkali glass in the melting tank is about 12 〇〇 14 14 。.匸, the temperature of the molten glass of the alkali-free glass in the same melting tank is about 15 〇〇 to 165 〇 < t. In order to produce a high-quality glass substrate, it is necessary to discharge the molten glass mainly containing a large amount of cerium oxide from the stirring tank. In this case, the platinum or platinum alloy discharge tube is electrically heated to the vicinity of the temperature of the molten glass, that is, By heating the drainage tube to control the viscosity of the molten glass in the drainage tube, the smelting glass mainly containing a large amount of oxidization error is discharged from the (four) tank through the discharge tube. If the viscosity characteristic with respect to temperature is described, the viscosity of the green glass has a characteristic of slowly decreasing with an increase in temperature, and the viscosity of the glass-free glass has a characteristic of drastically decreasing in a specific small temperature range. Therefore, in (4), there is no difficulty in adjusting the discharge flow from the discharge pipe only by the temperature of the discharge pipe... as shown in Fig. 4, the previous discharge pipe connected to the bottom of the stirred tank 149807.doc 201109284 The shape of 2 is set to the shape of a straight pipe (refer to the flow nozzle 4 of the patent document (1)). Therefore, it is considered that the temperature of the discharge pipe is set to the temperature of the molten glass, and the pipe is integrally formed at the outlet of the discharge pipe, and the discharge amount is finely adjusted by limiting the discharge amount by the nozzle. > However, 'the pipe σ is disposed right to the drain pipe, and there is a problem that the nozzle is deteriorated or broken due to the high-temperature molten glass in the drain pipe, and the port & The discharge amount of the glazed glass is adjusted, resulting in a decrease in the quality of the manufactured glass sheet. That is, since the molten glass supplied to the floating de-forming apparatus contains a smelting glass which is mainly composed of a large amount of oxidized glass which is oxidized, that is, if the amount of molten glass is unnecessarily increased until the discharged product f When the glass is well melted, the productivity of the glass sheet is lowered. In order to solve this problem, it is necessary to replace the entire drain pipe. Since the discharge pipe "stops the production of the glass plate at the time of replacement, there is a disadvantage that the productivity of the glass plate is lowered. Further, in the case of replacing the nozzle having a different diameter and optimizing the discharge amount, it is necessary to replace the entire discharge tube. Therefore, in this case, there is also a disadvantage that the productivity of the glass sheet is lowered. The present invention has been made in view of the above circumstances, and an object thereof is to provide a glass manufacturing apparatus and a glass manufacturing method which can improve the quality of glass and improve productivity. Means for Solving the Problems In order to achieve the above object, the present invention provides a glass manufacturing apparatus which is provided at a bottom portion of a container for temporarily accommodating molten glass or a conveying tube for conveying molten glass, and is provided with a discharge for discharging molten glass. 149807.doc 201109284 is characterized in that the above-mentioned drainage pipe comprises: a bottom of the discharger or the above-mentioned conveying pipe, which is connected to the above-mentioned capacity σ σ and includes a twisting machine, the mouth thereof is detachably provided at ... The agency, and the e-department. According to the present invention, the nozzle as the lower portion thereof is provided as a separation structure: the discharge pipe of: = is disposed at the pipe opening. By discharging the discharge tube by the discharge pipe == loading and unloading, the heating mechanism such as the electric heating device is used to heat the discharge pipe to "when" (four) out of the pipe, the glass row: = two heat to a specific temperature, and the heat is maintained Good viscosity, in this state, the molten glass is discharged from the nozzle and discharged from the nozzle. Moreover, when the nozzle is deteriorated or broken, the nozzle is replaced, and the tube is replaced with a nozzle having a different diameter. In the case of optimizing the nozzle, only the nozzle is discharged and replaced with a new one. Thereby, the nozzle of the nozzle is easy and can be completed in a short time of 3, Therefore, the quality of the glass to be produced is not affected, and the replacement operation can be performed without stopping the glass manufacturing apparatus, so that the productivity of the glass is improved. 2 'In the present invention, the molten glass contained in the container or the above-mentioned transfer tube The temperature of the molten glass to be conveyed is preferably 1350 to 1450<t; the temperature of the molten glass discharged from the discharge tube is preferably 1200 to 1400<t, and the molten glass is set to have a viscosity of the molten glass of WdPa.s] , 1 training = 2 when the temperature is appropriate 146 CTC and 175 (TC or less. According to the present invention, the heterogeneous molten glass can be stably discharged. Further, the above-mentioned discharge pipe of the present invention is preferably made of platinum or a platinum alloy, and has a thickness of 0.3 to 2 mm and a length of 200 to 800. Mm, inner diameter is 20~80 mm, and heated to 1050~135 (TC by the above heating mechanism; and the above nozzle should be made of 149807.doc 201109284 or platinum alloy, the diameter of the discharge port is 3~7〇 stable Only the heterogeneous molten glass is discharged. mm. According to the present invention, it is preferable to provide a heating mechanism for the above-mentioned nozzle by the present invention. According to the present invention, the nozzle is heated to the discharge tube by the heating mechanism. The same temperature can stably discharge only the heterogeneous molten glass. The above-mentioned discharge pipe of the present invention is preferably detachably connected to the bottom of the above-mentioned state or the bottom of the transfer pipe. According to the present invention, the discharge pipe is damaged. In the case of the above, it is possible to easily replace it with a new discharge pipe. In order to achieve the above (4), the present invention provides a glass manufacturing method characterized by using the glass manufacturing apparatus of the present invention to manufacture glass. According to the glass manufacturing method of the present invention, the quality of the produced glass can be improved and the productivity can be improved. As described above, according to the glass manufacturing apparatus and the glass manufacturing method of the present invention, the discharge pipe of the drain pipe is Since the nozzle is provided as a separate structure, the port can be replaced, and the quality of the manufactured glass can be improved and the productivity can be improved. [Embodiment] Hereinafter, the glass manufacturing apparatus and the glass manufacturing method of the present invention will be described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing an embodiment of a glass manufacturing apparatus of the present invention. The glass manufacturing apparatus includes a melting tank 20 which melts glass raw material and houses molten glass G; The defoaming device 1 is a vacuum defoaming treatment of the molten glass G and a vacuum pumping of the gas in the molten glass crucible 149807.doc 201109284. In addition, the glass material of the embodiment is a glass material which does not substantially contain an alkali metal oxide suitable for a glass substrate for an LCD (Liquid Crystal Display), but is not limited to the glass thick material, and may be contained. A glass material (silver glass) suitable for metal oxides of glass substrates for PDP (Plasma Display Panel). The composition of the non-test glass (composed of mass percentage) is: SiO2: 50.0~66.0%, A12〇3:10.5~22.0%, B2O3: 0~12.0%,
MgO:0〜8.0%、CaO:〇〜14.5%、SrO:〇〜24.0%、BaO:0〜13.5%、 ]^〇+(^〇+8!*〇+83〇:9.0~29.5%，但該組成亦為一例。 溶解槽20為利用燃燒燃料氣體所獲得之火焰之熱，或以 利用電熱所獲得之約1 500°C以上之高溫炼融玻璃原料，並 收谷s亥炼融玻璃G之槽，且配置於減壓消泡裝置1 〇之前 段。於熔解槽20中，熔融玻璃G係將該溶液表面暴露於大 氣壓下形成自由表面。又，熔解槽2〇由含有氧化鍅之耐火 磚而構成。含有上述氧化鍅之耐火磚由以重量％計Zr〇2& 85%以上97%以下，剩餘部分由Si〇2作為主體之玻璃質熱 溶融耐火物構成。 減壓消泡裝置1 0係於經減壓之減壓消泡槽14中進行熔融 玻璃G之減壓消泡處理。該減壓消泡裝置丨〇包括減壓消泡 槽14、上升管16、及下降管18。 上升官16之下端連接於上游側攪拌罐22，該上游側攪拌 罐22連通於熔解槽20，下降管18之下端連接於下游側攪拌 罐24，該下游側攪拌罐24經由搬送管27連通於浮式法成形 149807.doc 201109284 裝置26 〇 上游側授掉罐22為暫時性地收容熔融玻璃G之容器。該 上游側授拌罐22之上游經由搬送f27與溶解槽2()連接，下 游經由搬送管27與上升管16之下游連接。另一方面，下游 側授拌罐24之上龍由搬送#27與下降㈣之下游連接， 下游、’星由搬送官27與浮式法成形裝置26連接。又，於上游 側搜掉罐22之内部，搜拌向減壓消泡槽14供給之熔融玻璃 G之上游側攪拌器36係浸於熔融玻璃g中而設置。又，於 下游側攪拌罐24之内部，攪拌自減壓消泡槽14排出之熔融 玻璃G之下游側攪拌器3 8係浸於熔融玻璃G中而設置。 若將攪拌罐之上部空間設為氮氣環境，則鉑製攪拌罐内 部不會發生氧化昇華’從而可抑制由此所引起之玻璃缺 點，因而較佳。 上游側搜拌H 36及下游㈣拌器38包含旋轉自如之轴及 螺旋狀纏繞於該軸之葉片。 根據如上述所構成之玻璃製造裝置，無鹼玻璃藉由以下 方法製造。 首先’將實質上不含鹼金屬氧化物之玻璃原料連續投入 至炫解槽20中，以测〜16賊加熱溶解，而製成溶融玻 璃G。 繼而，將熔融玻璃G藉由上游側攪拌罐22攪拌，藉由減 壓消泡槽14減壓消泡，並藉由下游側攪拌罐24攪拌。 繼而’於㈣步财’藉㈣式法等破璃板成形方法而 成形為特定之板厚’緩冷後’將其切割而製造出期望之大 149807.doc 201109284 小之無驗玻璃。 且說，於實施形態之破璃製造裝置令，於形成於上游側 攪拌罐22之底部之開口部23設置有排流管4〇。該排流管4〇 包含排出管42及管口 44。 圖2係模式性地表示上游側攪拌罐22及排流管4〇之構成 之結構圖。根據該圖，構成排流管4〇之排出管42包含電熱 加熱裝置46，又，管口44裝卸自如地設置於排出管42之下 。即，貫施形態之排流管4〇中，排出管42與管口 為分 離結構，管口44相對於排出管42裝卸自如地安裝。 於藉由排流管40將積存於上游側攪拌罐22之底部且主要 含大置氧化錯之熔融玻璃排出之情形時，藉由電熱加熱裝 置46將排出管42加熱至特定之溫度，從而排出管42内之熔 ㈣璃G排出時保持良好之點度，於該狀態下，熔融玻璃 自管口44之排出口45朝箭頭方向排出至外部。而且，於管 口 44劣化或破損而更換管口料之情形時，及於更換為排出 口 45之口徑不同之管口料以使管口料最佳化之情形時，僅 將管口 44自排出管42卸除並更換為新的管口 44。 藉此，管口 44之更換作業變得容易，且於短時間内完 成因而不會對所製造之玻璃板之品質造成影響，且可進 打更換作業而#需停止玻璃製造裝i ’因此玻璃板之生產 性提南。 士相對於排出管42之管口 44之安裝結構可舉例以下之安裝 、°構。於各個連結部形成凸緣42A、44A，由耐火物（未圖 八）按C g 口 44之凸緣44A而安裝於排出管42之凸緣42A。 149807.doc 201109284 根據該安裝結構，可相對於排出管42簡單地裝卸管口 44。 再者，即便於在管口 44之更換時停止玻璃製造裝置之情形 時，亦由於管口 44之更換作業變得容易而使停止時間為極 短時間即可’因此不會降低玻璃板之生產性。 又，於玻璃製造裝·置之實施形態中，收容於上游側攪拌 罐22之·熔融玻璃G或由搬送管27搬送之熔融玻璃G之溫度 較佳為1350〜145CTC，自排流管40排出之熔融玻璃G之溫度 較佳為1200〜1400t。又，熔融玻璃g係將熔融玻璃G之黏 度設為ri[dPa.s]時，l〇gT1=2時之溫度較佳為超過146(rc且 為1750°C以下。藉此’可自排流管4〇之管口 44穩定地排出 主要含有大量氧化錯之熔融玻璃G。 又’實施形態之排出管42較佳為鉑或鉑合金製，厚度為 〇·3〜2 mm，長度為200〜800 mm，内徑為20〜80 mm，並藉 由電熱加熱裝置46加熱至1050〜1350。(：。另一方面，管口 44較佳為鉑或鉑合金製’排出口 45之口徑為3〜7〇爪爪。藉 此’可自排流管40之管口 44穩定地僅排出主要含有大量氧 化锆之熔融玻璃Ge再者，於排出管42中，亦可於耐火磚 等对火物中形成與排出管42大致相同直徑之貫通孔，且於 該貫通孔之内周面喷敷並塗佈鉑或鉑合金而構成。 又’亦可如圖3般於管口 44設置電熱加熱裝置48(加熱機 構）。藉由電熱加熱裝置48將管口 44加熱至與排出管42之 溫度相同程度，藉此可消除管口 44與熔融玻璃G之溫度 差’因而可防止由該溫度差所引起之管口 44之早期劣化、 破損。 149807.doc 11 201109284 又，管口44之加熱機構並不限定於電熱加熱裝置48，亦 可藉由燃燒器加熱。 進而，亦可如圖3般將排出管42裝卸自如地連結於上游 側攪拌罐22之底部《藉此，於排出管42破損之情形時，玎 容易地更換為新的排出管42。相對於上游側撥拌罐22之排 出管42之安裝結構，可舉例以下之安裝結構：於排出管42 之連結部形成凸緣42B，由耐火物（未圖示）按壓排出管42 之凸緣42B而安裝於與上游側揽拌罐22之開口部23對應之 底部。根據該安裝結構，可相對於上游側攪拌罐22之底部 簡單地裝卸排出管42。 再者’由排流管40所排出之異質之熔融玻璃g之排出量 為母天約1〜3 0π頓。 再者’所排出之異質之熔融玻璃G，其後作為玻璃屑， 確認組成或含水量，可再利用於符合用途之玻璃。 於實施形態中，已說明於上游側攪拌罐22設置實施形態 之排流管40之例’但排流管4〇之安裝位置並不限定於上游 側揽拌罐22，亦可於下游側攪拌罐24設置排流管40，又， 只要為設置於自熔解槽2〇至浮式法成形裝置26為止之路徑 之搬送熔融玻璃G之搬送管27，則亦可於該搬送管（例如， 將熔融玻璃G自熔解槽2〇搬送至上游側攪拌罐22之搬送管 27及/或將熔融玻璃G自下游側攪拌罐24搬送至浮式法成形 裝置26之搬送管2乃之底部設置排流管40。 若進而於熔解槽2 〇與搬送管2 7之接合部附近之熔解槽底 部設有漏斗結構等而設置排流管4〇(未圖示），則亦有效。 149807.doc 201109284 再者，較佳為於熔解槽20與搬送管27之接合部之耐火磚 中設置鉑或鉑合金製之保護層（未圖示）。 更佳為於熔解槽20之側壁，設置有在熔解槽之維護等時 用於抽出熔融玻璃之抽出口（未圖示）。 該等熔解槽20、或熔解槽底部之排流管周邊、或上述抽 出口周邊之耐火磚，若由85重量％〜97重量％為汾〇2且剩餘 邛刀為Si〇2主體之玻璃質耐火磚構成，則耐侵蝕性高，因 而較佳。 又，熔融玻璃G並不限定於無鹼玻璃，即便為鹼性玻璃 亦可適用實施形態之排流管4〇。即，於製造鹼性玻璃製之 PDP用玻璃基板之製造裝置，及製造鹼性玻璃製製之lcd 用玻璃基板之製造裝置中可適用實施形態之排流管4〇。 進而，玻璃板之製造方法並不限定於浮式法，亦可使用 其他製造方法，例如再拉法、流孔下引法、溢流下拉法 等。 已詳細地且參照特定之實施形態對本發明進行了說明， 但業者應當明白只要不脫離本發明之精神及範圍則可添加 各種變更或修正。 本申請案係基於2009年7月24日提出申請之曰本專利申 請案2009-173509，其内容以參照之形式併入本文中。 產業上之可利用性 根據本發明之玻璃製造裝置及玻璃製造方法，由於將排 流管之排出管與管口設為分離結構，因而可進行管口之更 換，從而實現所製造之玻璃之品質提高及生產性提高。 I49807.doc 201109284 【圖式簡單說明】 圖1係表示本發明之玻璃製造裝置之實施形態之概略剖 面圖； 圖2係模式性地表示上游側攪拌罐與排流管之構成之結 構圖； ％ 圖3係模式性地表示上游側攪拌罐與排流管之構成之另 一結構圖；及 圖4係模式性地表示先前之攪拌罐與排流管之構成之結 構圖。 【主要元件符號說明】 1 攪拌罐 2、40 排流管 10 減壓消泡裴置 14 減壓消泡槽 16 上升管 18 下降管 20 熔解槽 22 上游側攪拌罐 23 開口部 24 下游側攪拌罐 26 浮式法成形農置 27 搬送管 36 上游側攪拌器 38 下游側攪拌器 149807.doc 14· 201109284 42 排出管 42A ' 42B ' 44A 凸緣 44 管口 45 排出口 46 ' 48 電熱加熱裝置 G 熔融玻璃 149807.doc )C -15-MgO: 0 to 8.0%, CaO: 〇 to 14.5%, SrO: 〇 to 24.0%, BaO: 0 to 13.5%, ]^〇+(^〇+8!*〇+83〇: 9.0 to 29.5%, but This composition is also an example. The dissolution tank 20 is a heat of a flame obtained by burning a fuel gas, or a high-temperature refining glass raw material of about 1 500 ° C or higher obtained by using electric heating, and a smelting glass G The groove is disposed in the front stage of the vacuum defoaming device 1. In the melting tank 20, the molten glass G is exposed to atmospheric pressure to form a free surface. Further, the melting tank 2 is made of refractory containing cerium oxide. The refractory brick containing the above cerium oxide is composed of Zr〇2 & 85% or more and 97% or less by weight%, and the rest is composed of a glassy hot-melt refractory mainly composed of Si〇2. 0 is a vacuum defoaming treatment of the molten glass G in the reduced pressure defoaming tank 14 under reduced pressure. The reduced pressure defoaming device 丨〇 includes a reduced pressure defoaming tank 14, a riser pipe 16, and a downcomer 18. The lower end of the ascending official 16 is connected to the upstream side agitating tank 22, the upstream side agitating tank 22 is connected to the melting tank 20, and the lower end of the downcomer 18 is connected downstream. The side stirring tank 24 is connected to the floating side forming 149807.doc 201109284 by the conveying pipe 27, and the upstream side side tank 22 is a container for temporarily accommodating the molten glass G. The upstream side of the tank 22 is connected to the dissolution tank 2 () via the transfer f27, and the downstream side is connected to the downstream of the riser 16 via the transfer pipe 27. On the other hand, the downstream side feed tank 24 is transported downstream by the transfer #27 and the descending (four). The connection, downstream, and the star are connected to the float forming apparatus 26 by the transporting officer 27. Further, the inside of the tank 22 is searched for on the upstream side, and the upstream side mixer of the molten glass G supplied to the vacuum degassing tank 14 is mixed. 36 is immersed in the molten glass g, and is further immersed in the molten glass G in the inside of the downstream side stirring tank 24, stirring the downstream side of the molten glass G discharged from the decompression defoaming tank 14 If the upper space of the agitating tank is set to a nitrogen atmosphere, the oxidative sublimation does not occur inside the platinum stirring tank, so that the glass defects caused thereby can be suppressed, and thus it is preferable. The upstream side is mixed with H 36 and downstream (four). Mixer 38 contains a shaft that rotates freely The blade is spirally wound around the shaft. According to the glass manufacturing apparatus constructed as described above, the alkali-free glass is produced by the following method. First, the glass raw material substantially free of the alkali metal oxide is continuously supplied into the squeezing tank 20. The molten glass G is stirred by the upstream side stirring tank 22, and decompressed by the decompression defoaming tank 14 by the decompression defoaming tank 14 and stirred by the downstream side. The tank 24 is stirred. Then, in the "fourth step", the four-layer method and the glass forming method are used to form a specific thickness, and after the slow cooling, the cut is made to produce the desired large size. 149807.doc 201109284 glass. Further, in the glass manufacturing apparatus of the embodiment, the discharge pipe 4 is formed in the opening portion 23 formed at the bottom of the upstream side stirring tank 22. The drain tube 4A includes a discharge tube 42 and a nozzle port 44. Fig. 2 is a structural view schematically showing the configuration of the upstream side stirring tank 22 and the drain pipe 4'. According to the figure, the discharge pipe 42 constituting the discharge pipe 4 includes the electric heating device 46, and the nozzle 44 is detachably provided below the discharge pipe 42. That is, in the tubular discharge tube 4, the discharge pipe 42 and the nozzle are separated, and the nozzle 44 is detachably attached to the discharge pipe 42. When the molten glass accumulated in the bottom of the upstream side stirring tank 22 and mainly containing the large oxidation fault is discharged by the drain pipe 40, the discharge pipe 42 is heated to a specific temperature by the electric heating device 46, thereby discharging In the state in which the molten (four) glass G in the tube 42 is discharged, the molten glass is kept out to the outside in the direction of the arrow from the discharge port 45 of the nozzle 44. Further, when the nozzle 44 is deteriorated or damaged to replace the nozzle material, and when the nozzle material having a different diameter of the discharge port 45 is replaced to optimize the nozzle material, only the nozzle 44 is self-contained. The discharge tube 42 is removed and replaced with a new nozzle 44. Thereby, the replacement work of the nozzle 44 becomes easy, and it is completed in a short time, so that the quality of the manufactured glass plate is not affected, and the replacement work can be performed. #The glass manufacturing device needs to be stopped. The production of the board is in the south. The mounting structure of the nozzle 44 with respect to the nozzle 44 of the discharge pipe 42 can be exemplified by the following installation and configuration. The flanges 42A and 44A are formed in the respective joint portions, and are attached to the flange 42A of the discharge pipe 42 by the refractory (not shown) in the flange 44A of the C g port 44. 149807.doc 201109284 According to this mounting structure, the nozzle 44 can be easily attached and detached with respect to the discharge pipe 42. Furthermore, even when the glass manufacturing apparatus is stopped at the time of replacement of the nozzle 44, the replacement time of the nozzle 44 becomes easy, and the stop time is extremely short, so that the production of the glass sheet is not lowered. Sex. In the embodiment of the glass manufacturing apparatus, the molten glass G accommodated in the upstream side stirring tank 22 or the molten glass G conveyed by the conveying pipe 27 is preferably 1350 to 145 CTC, and is discharged from the drain pipe 40. The temperature of the molten glass G is preferably 1200 to 1400 t. Further, when the viscosity of the molten glass G is ri [dPa.s], the temperature of l〇gT1 = 2 is preferably more than 146 (rc and 1750 ° C or less. The nozzle 44 of the flow tube 4 is stably discharged from the molten glass G mainly containing a large amount of oxidization. The discharge tube 42 of the embodiment is preferably made of platinum or a platinum alloy, and has a thickness of 〇·3 to 2 mm and a length of 200. 〜800 mm, an inner diameter of 20 to 80 mm, and heated to 1050 to 1350 by the electric heating device 46. (: On the other hand, the nozzle 44 is preferably made of platinum or platinum alloy, and the diameter of the discharge port 45 is 3~7〇 claws. By this, the nozzle 44 of the drain tube 40 can stably discharge only the molten glass Ge mainly containing a large amount of zirconia, and in the discharge pipe 42, it can also be fired on the refractory bricks. A through hole having substantially the same diameter as the discharge pipe 42 is formed, and a platinum or a platinum alloy is sprayed on the inner circumferential surface of the through hole. Further, electric heating can be applied to the nozzle 44 as shown in FIG. Device 48 (heating mechanism). The nozzle 44 is heated by the electrothermal heating device 48 to the same level as the temperature of the discharge tube 42, thereby eliminating The temperature difference between the port 44 and the molten glass G can prevent early deterioration and breakage of the nozzle 44 caused by the temperature difference. 149807.doc 11 201109284 Moreover, the heating mechanism of the nozzle 44 is not limited to the electric heating device 48. Further, the discharge pipe 42 can be detachably coupled to the bottom of the upstream side agitation tank 22 as shown in Fig. 3. Thus, when the discharge pipe 42 is broken, the crucible is easily replaced. The new discharge pipe 42. The mounting structure of the discharge pipe 42 of the upstream side mixing tank 22 can be exemplified by the following mounting structure: a flange 42B is formed at the joint portion of the discharge pipe 42, and a refractory (not shown) is used. The flange 42B of the discharge pipe 42 is pressed and attached to the bottom portion corresponding to the opening portion 23 of the upstream side mixing tank 22. According to this mounting structure, the discharge pipe 42 can be easily attached and detached to the bottom of the upstream side agitating tank 22. 'The discharge amount of the heterogeneous molten glass g discharged from the discharge pipe 40 is about 1 to 3 0 pm on the mother's day. Further, the molten glass G of the heterogeneous material discharged is used as the glass swarf, and the composition or water content is confirmed. Reusable In the embodiment, the example in which the drain pipe 40 of the embodiment is provided in the upstream side agitating tank 22 has been described. However, the mounting position of the drain pipe 4 is not limited to the upstream side mixing tank 22, and The drain pipe 40 may be provided in the downstream side agitating tank 24, and the transfer pipe 27 may be transported in the path of the molten glass G provided in the path from the melting tank 2 to the float forming device 26. The tube (for example, the transfer tube 27 that transports the molten glass G from the melting tank 2 to the upstream side stirring tank 22 and/or the conveying tube 2 that transports the molten glass G from the downstream side stirring tank 24 to the floating method forming device 26 A drain pipe 40 is provided at the bottom. Further, it is also effective to provide a drain pipe 4 (not shown) by providing a funnel structure or the like at the bottom of the melting tank in the vicinity of the joint portion between the melting tank 2 and the transfer pipe 27. Further, it is preferable that a protective layer (not shown) made of platinum or a platinum alloy is provided in the refractory brick of the joint portion between the melting tank 20 and the transfer pipe 27. More preferably, the side wall of the melting tank 20 is provided with an extraction port (not shown) for extracting the molten glass during maintenance of the melting tank or the like. The melting tank 20, or the periphery of the drain pipe at the bottom of the melting tank, or the refractory brick around the suction port, is made of 85% by weight to 97% by weight of 汾〇2 and the remaining boring tool is the glass of the Si〇2 main body. The refractory brick is preferred because it has high corrosion resistance. Further, the molten glass G is not limited to the alkali-free glass, and the drain pipe 4 of the embodiment can be applied even if it is an alkali glass. In other words, the discharge pipe 4 of the embodiment can be applied to a production apparatus for producing a glass substrate for a PDP made of an alkali glass and a production apparatus for a glass substrate for an LCD made of an alkali glass. Further, the method for producing the glass sheet is not limited to the floating method, and other manufacturing methods such as a re-drawing method, a flow-down method, an overflow down-draw method, and the like may be used. The present invention has been described in detail with reference to the specific embodiments thereof, and it is understood that various changes or modifications may be added without departing from the spirit and scope of the invention. This application is based on a patent application No. 2009-173509 filed on Jul. 24, 2009, the content of which is hereby incorporated by reference. INDUSTRIAL APPLICABILITY According to the glass manufacturing apparatus and the glass manufacturing method of the present invention, since the discharge pipe and the nozzle of the discharge pipe are separated, the nozzle can be replaced, thereby realizing the quality of the manufactured glass. Increased and productive. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing an embodiment of a glass manufacturing apparatus of the present invention; FIG. 2 is a structural view schematically showing a configuration of an upstream side stirring tank and a drain pipe; Fig. 3 is a structural view schematically showing another configuration of the upstream side agitating tank and the drain pipe; and Fig. 4 is a structural view schematically showing the configuration of the previous agitating tank and the drain pipe. [Description of main component symbols] 1 Stirring tank 2, 40 Drainage pipe 10 Pressure reducing defoaming device 14 Pressure reducing defoaming tank 16 Upcomer pipe 18 Down pipe 20 Melting tank 22 Upstream side stirring tank 23 Opening part 24 Downstream side stirring tank 26 Floating Forming Farming 27 Transfer Pipe 36 Upstream Side Stirrer 38 Downstream Side Stirrer 149807.doc 14· 201109284 42 Drainage Pipe 42A '42B '44A Flange 44 Pipe Port 45 Drain Port 46 ' 48 Electric Heating Device G Melting Glass 149807.doc )C -15-