201100340 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種將玻璃原料投入至玻璃熔融爐之熔融 槽之原料供給方法及原料供給裝置、以及玻璃板之製造裝 置及製造方法。 【先前技術】 作為將玻璃原料投入至玻璃溶融爐之溶融槽之原料供給 方法，通常眾所周知有使用螺旋式投料機、振動投料機、 毯式投料機、振盪式投料機、或該等之組合之方法。該等 均為將鄰設於玻璃熔融爐之漏斗（原料罐）内之玻璃原=投 入至玻璃嫁融爐之炼融槽的方法。 投入至炫融槽内之玻璃原料係於—面在溶融槽内之炫融 玻璃上浮動一面移動至下游側之過程中，緩慢地熔融於熔 融玻璃。為使玻璃原料有效炫鬲虫，必需將玻璃原料廣範圍 地、較薄地、穩定地以固定量一點點地投入至熔融槽。 例如，作為使用螺旋式投料機之原料供給方法，眾所周 知有於玻璃熔融爐之原料投入口，朝向爐内沿複數之方^ 形成有傾斜面者（例如，參考專利文獻1}。根據該方法，可 將玻璃原料廣範圍地投入至熔融槽内。 先前技術文獻 專利文獻 專利文獻1 .曰本專利特開平i 〇_3丨6433號公報 【發明内容】 發明所欲解決之問題 147748.doc 201100340 然而，由於漏斗鄰接於玻璃熔融爐，因此漏斗内之玻璃 原料因來自玻璃熔融爐之輻射熱而被加熱。 於顯示器用玻璃基板之玻璃原料中，通常混合硼化合物 而使用。 作為棚化合物，通常使用硼酸（H3b〇3)。該硼酸為水合 物’若對其進行加熱，則會釋放出水合水。再者，亦可使 用將硼酸進行加熱處理所獲得之硼酸酐（b2〇3)代替硼酸， ❹ 但製造成本會上升。 如此’於玻璃原料包含水合物之情形時，存在如下情 形，即，若漏斗内之玻璃原料因來自玻璃熔融爐之輻射熱 而被加熱，則會釋放出水合水而變成塊狀。於該情形時， 有時玻璃原料變成塊而投入至溶融槽内。 投入至炼融槽内之玻璃原料係因玻璃熔融爐内之火焰熱 或輻射熱、來自熔融玻璃之傳熱而自外側受到加熱進行熔 融’因此當變成塊而投入時，相對較大之氣泡被封入内 〇 側。氣泡可能會成為所製造之玻璃板之缺陷。又，由於玻 璃原料包含熔點互不相同之複數種原料，因此存在如下情 形，即，當變成塊而投入時，直至整體熔融為止需要時 間，熔融玻璃之組成變得不均勻。 本發明係鑒於上述問題開發而成者，其目的在於提供一 種可將包含水合物之玻璃原料適當地投入至玻璃熔融爐之 溶融槽的原料供給方法及原料供給裝置、以及玻璃板之製 造裝置及製造方法。 解決問題之技術手段 147748.doc 201100340 為解決上述目的，太凝^ gg 本發明之原料供給方法係將鄰設於玻[Technical Field] The present invention relates to a raw material supply method and a raw material supply device for introducing a glass raw material into a melting tank of a glass melting furnace, and a glass plate manufacturing apparatus and a manufacturing method. [Prior Art] As a raw material supply method for introducing a glass raw material into a melting tank of a glass melting furnace, it is generally known to use a spiral feeder, a vibrating feeder, a blanket feeder, an oscillating feeder, or a combination thereof. method. These are all methods in which the glass original placed in the funnel (raw material tank) of the glass melting furnace is placed in the refining tank of the glass marrying furnace. The glass raw material which is put into the smelting tank is slowly melted in the molten glass during the process of moving to the downstream side while floating on the glazed glass in the melting tank. In order to make the glass raw material effective for mites, it is necessary to put the glass raw material into the melting tank in a wide range, thinly, and stably at a fixed amount. For example, as a raw material supply method using a screw feeder, it is known that the raw material input port of the glass melting furnace is formed with a slanted surface along the plural in the furnace (for example, refer to Patent Document 1). A wide range of glass raw materials can be put into a melting tank. PRIOR ART DOCUMENT PATENT DOCUMENT Patent Document 1. Japanese Patent Application Laid-Open No. Hei. No. 6433 [Abstract] Problems to be Solved by the Invention 147748.doc 201100340 However Since the funnel is adjacent to the glass melting furnace, the glass material in the funnel is heated by the radiant heat from the glass melting furnace. In the glass raw material of the glass substrate for a display, a boron compound is usually mixed and used. As a shed compound, boric acid is usually used. (H3b〇3). The boric acid is a hydrate. If it is heated, water of hydration is released. Further, boric anhydride (b2〇3) obtained by heat-treating boric acid may be used instead of boric acid. However, the manufacturing cost will increase. Thus, when the glass raw material contains a hydrate, there is a case where the leak occurs. When the glass raw material is heated by the radiant heat from the glass melting furnace, the hydrated water is released and becomes a block. In this case, the glass raw material is turned into a lump and is put into the melting tank. The glass raw material is melted by heating from the outside due to heat of flame or radiant heat in the glass melting furnace and heat transfer from the molten glass. Therefore, when it is put into a block, a relatively large bubble is sealed to the inner side. In addition, since the glass raw material contains a plurality of kinds of raw materials having different melting points, there is a case where it takes time to melt until it becomes a block, and the composition of the molten glass is required. The present invention has been developed in view of the above problems, and an object of the present invention is to provide a raw material supply method, a raw material supply device, and a glass which can appropriately introduce a glass material containing a hydrate into a melting tank of a glass melting furnace. Manufacturing device and manufacturing method of the board. Technical means for solving the problem 147748.doc 201100340 Object, the raw material supply system so condensate ^ gg method of the present invention will be disposed adjacent to the glass
璃炫融爐之原料罐内之I 罐t坡璃原料投入至上述玻璃熔融爐之 熔融槽者， 將上述原料罐内之溫度保持為高於露點溫度且低於上述 玻璃原料中所含之水合物之脫水起始溫度。 本發明之原料供給裝置係包”設於玻_融爐之原料 罐、並將該原料罐内之玻璃原料投入至上述玻璃炼融爐之 熔融槽者，其包括·· /里度保持機構，其係將上述原料罐内之溫度保持為高於 露點温度且低於上述玻璃原料中所含之水合物之脫水起始 溫度。 本發明之玻璃板之製造裝置包括：本發明之原料供給裝 置；玻璃熔融爐，其係將藉由該原料供給裝置所供給之玻 璃原料進行熔融；以及成形爐，其係將以該玻璃熔融爐經 熔融之熔融玻璃成形為板狀玻璃。 本發明之玻璃板之製造方法係使用本發明之玻璃板之製 造裝置以製造玻璃板。 發明之效果 可提供一種可將包含水合物之玻璃原料適當地投入至玻 璃溶融爐之熔融槽的原料供給方法及原料供給裂置、以及 玻璃板之製造裝置及製造方法。 【實施方式】 以下’參考圖式，對用以實施本發明之形態進行★兒明。 圖1係表示本發明之一實施形態之破璃板之製造妒置之 147748.doc 201100340 構成的方塊圖，箭頭表示玻璃原料或熔融玻璃之流向。圖 2係用以說明原料供給裝置10之構成及動作之剖面圖。 如圖1及圖2所示，玻璃板之製造裝置包括：原料供給裝 置1〇,其係將粉狀或粒狀之玻璃原料（}投入至玻璃熔融爐 11，玻璃熔融爐11，其係將藉由原料供給裝置1〇所供給之 玻璃原料G進行熔融；以及成形爐12，其係將經玻璃熔融 爐11熔融之溶融玻璃L成形為板狀玻璃。 〇 玻璃熔融爐11可為眾所周知之構成，例如包括原料投人 口 13、熔融槽U及澄清槽丨5等。於原料投入口 ^之上方， 設置有用以防止原料供給時之玻璃原料〇之飛散的防塵板 16。 自原料投入口 13所投入之玻璃原料G之大部分係一面於 熔融槽Μ内之溶融玻璃L上浮動，—面移動至溶融槽此 下游側（澄清槽15側）。玻璃原料G係於移動至澄清槽⑸則 〇 之過程中’藉由玻璃熔融爐u内之火焰熱或輻射埶、來自 炼融玻璃L之傳導熱而受到加熱，緩慢㈣人㈣玻犯 中。 炫融玻璃L係將粉狀或粒狀之玻璃原料〇進行熔融所獲 得，因此於内部包含大量氣泡。因此，將溶融玻璃l自溶 融槽14搬送至澄清槽15，使氣泡浮上來而將其去除，然後 進行澄清。又，亦可於澄清槽15與成形爐12之間設置減壓 消泡槽。 成形爐12可為眾所周知之構成，例如於所謂之浮式法 中’包括浮動槽17等。澄清後之炫融玻璃L係流出至浮動 U7748.doc 201100340 :17内之熔融金屬(例如，熔融錫)上，藉由熔融金屬之平 '月之表面而成為板狀玻璃。該板狀玻璃係-面移動至浮動 槽17之下游側-面被冷卻，從而製造玻璃板。 再者，於本實施形態中’成形爐12包括浮動槽17等，但 本發明並不限定於此。例如於所謂之溶融法中，成形爐Η 匕括朝向下方收縮之剖面為楔狀之成形體等。於該情形 時從β後之熔融玻璃L係沿成形體之兩側面流下且於成 形體之下緣合流而成為板狀玻璃。該板狀玻璃係一面朝向 下方拉伸一面被冷卻’從而製造玻璃板。 原料供給裝置1〇係於玻璃熔融爐u(熔融槽14)，橫向排 列地設置有複數個（例如，2個）（於圖2中，僅圖示^固）。各 原料供給裝置10包括：漏斗（原料罐）21，其係鄰設於玻璃 熔融爐11 ;以及搬送盤22，其係將自漏斗21所投下之玻璃 原料G搬送至玻璃溶融爐11。 首先，對漏斗21進行說明。 漏斗21係由鋼材（例如’ sS(stainless steel，不鏽鋼）材） 等形成。漏斗21係構成為朝向下方構成為前端變細之筒形 狀’於上側包含入口 21 a且於下側包含出口 21 b。漏斗21係 於上下方向分割成複數之構件，可於上下方向伸縮。藉 此，可於上下方向調節搬送盤22之位置。 於漏斗入口 21a之上方，設置有將複數種原料稱量且加 以混合而製成玻璃原料G之混合機（未圖示）。將以混合機 經混合之玻璃原料G投下至漏斗入口 21 a，將其儲存於漏斗 内。 147748.doc 201100340 再者，混合前之各種原料係通過原料供給管（未圖示）而 空氣壓送至混合機。原料供給管之内周係被耐磨損性優異 之電鑄磚等覆蓋。 於漏斗出口21b與搬送盤22之搬送面23之間，包含間隙 25。漏斗21内之玻璃原料G係自該間隙25搬送（投下）至搬 送面23。 以將玻璃原料G適當地搬送至搬送面23之方式，設定間 ❹ 隙25之大小、搬送面23對於水平面之傾斜角θ、玻璃原料G 之靜止角。將搬送面23對於水平面之傾斜角θ(參考圖2)設 定為8°〜15°，較佳為10。〜12。之範圍内。將玻璃原料G之靜 止角設定為30。〜45。，較佳為35。〜40。之範圍内。 此處，靜止角係藉由如JIS R 9301_2_2「氧化鋁粉末_第2 部：物性測定方法-2:靜止角」所記載之方法進行測定所 得者。更洋細而言，靜止角係藉由如下方式規定，流動性 越佳之粉體，其值越小：一面使直徑為8〇 mm、網眼為7 i 〇 Ο μίη2篩振動，—面使試驗體（儲存於漏斗21内之前之玻璃 原料G)通過此篩後，使其自水平面起16〇 mm之高度之漏 斗輕輕地降落至直徑為80 mm之平台時，測定由試驗體所 形成之圓錐體之母線與水平面所成之角。此處，粉體之降 落量係直至靜止角實質上穩定為止所降落之量。 其次’對搬送盤22進行說明。 搬送盤22係由鋼材（例如，SS材）等形成。搬送盤22包含 平板狀之本體31。本體31之上表面成為承載自漏斗21所投 下之玻璃原料G的搬送面23。於搬送面23上突設有一對側 147748.doc 201100340 板32，以免搬送面23上之玻璃原料g沿著與搬送方向正交 之方向滑落。 由於搬送盤22之搬送面23成為傾斜面，因此其前端部 22a自原料投入口 13時常插入至玻璃熔融爐丨丨内以使玻 璃原料G即便因傾斜而自搬送面23滑落，亦可投入至熔融 槽14内。 搬达盤22構成為如下，即，可於搬送方向上游端（後退 位置）與搬送方向下游端（前進位置）之間進行往返移動。搬 送盤22包括可於一對導軌26上移動之複數之車輪34。導軌 26係支撐於機架27上，其朝向玻璃熔融爐u内沿前低後高 之方向引導搬送盤22。因此，搬送盤22之搬送面23成為朝 向玻璃熔融爐11内前低後高之傾斜面。 例如，如圖2及圖3所示，各原料供給裝置1〇包括固定於 機架27之馬達41、安裝於馬達41之旋轉軸之旋轉圓板“及 桿43作為使搬送盤22進退之進退機構4〇。於旋轉圓板“之 離心位置，可旋動地連結有桿43之一端部。桿43之另—端 部可旋動地連結於搬送盤22。 馬達41係與電腦等控制裝置28連接。於控制裝置28之控 制下，當旋轉圓板42因馬達41之旋旋動作而進行旋轉時， 桿43之一端部於旋轉圓板42之旋轉中心之周圍進行旋轉。 伴隨於此，桿43之另一端部進行擺動’與桿43之另一端部 連結之搬送盤22於導軌26上進行往返移動。 例如，如圖2所示，各原料供給裝置1〇包括移動台車η 及搭載於移動台車51之升降裝置52作為調節導轨％與熔融 I47748.doc 10- 201100340 槽14之相對位置的調節機構。移動台車51構成為如下， 即，可沿著與玻璃熔融爐11(熔融槽14)接近、遠離之方向 移動。升降裝置52包括自下表面側支撐機架27之支撐部 53、以及使該支撐部53升降之驅動裝置54。作為驅動裝置 54，例如可使用液壓千斤頂。 其次，參考圖2及圖3，對搬送盤22之動作進行說明。再 者，下述第1及第2步驟之作業係於控制裝置28之控制下， 〇 每隔特定之週期（例如，1分鐘〜10分鐘之週期）反覆執行。 於第1步驟中，如圖2中以箭頭所示，搬送盤22自後退位 置向則進位置前進。伴隨於此，搬送面23前進，因此破璃 原料G自搬送面23與漏斗出口 21b之間隙25搬送（投下）至搬 送面23。再者，於搬送盤22前進之期間，搬送面23上之玻 璃原料G係因摩擦而穩定地承载於搬送面23上。 於第2步驟中，如圖3中以箭頭所示，搬送盤22自前進位 置向後退位置後退。伴隨於此，搬送面23上之玻璃原料G 〇 受到擠壓而投下至熔融槽14内。 如此，將漏斗21内之破璃原料G，例如以〇3噸/小時〜13 頓/小％、較佳為〇·5噸/小時〜丨…镇/小時之供給速度投下至 玻璃熔融爐11之熔融槽14内。 各原料供給裝置Η)進而包括溫度保持機構，該溫度保持 機構係將漏斗21内之溫度保持為高於露點溫度且低於玻璃 原料G中所含之水合物之脫水起始溫度（較佳為較水合物之 脫水起始溫度低_以上）。此處，所謂脫水起始溫度係 才曰由於加熱，水合水（換言之，結晶水）開始自水合物脫離 147748.doc -13 - 201100340 之溫度。 於漏斗21内之溫度為露點溫度以下之情形時，有如下之 虞，即，水滴附著於漏斗21之内周面而漏斗21内之玻璃原 料G ft：成塊狀。再纟’由於漏斗21内之溫度通常因來自玻 璃熔融爐11之輻射熱而高於玻璃原料供給管内之溫度，因 此高於露點溫度。 另方面，於漏斗2 1内之溫度為玻璃原料θ中所含之水 a物之脫水起始溫度以上之情形時，有如下之虞，即，漏 斗21内之玻璃原料G釋放出水合水而變成塊狀。 於玻璃原料G中所含之水合物為硼酸（Η3Β〇3)之情形時， 較佳為將$斗21内之溫度言免為2(TC〜60。。，t佳為設為 20°C 〜50°C。 各原料供、’Ό裝置1 〇包括隔熱材料6丨、及冷卻裝置71作 為溫度保持機構。 首先，對隔熱材料61、62進行說明。 隔…、材料61、62係配置於漏斗2 1與玻璃熔融爐11之間。 隔熱材料61、62較理想的是由導熱率為〇 2〇 w/m κ以下之 材料y成作為隔熱材料6 1、62，例如可使用陶竞纖維製 ，隔熱板或隔熱片材（毯）、岩絨、隔熱性之耐火磚。於該 等之中’陶瓷纖維製之隔熱板因較輕、易於加工、形狀不 易變形，故特佳。隔熱材料61、62可由相同之材料形成， 亦可由不同之材料形成。 隔熱材料61之厚度較佳為25 mm〜50 mm之範圍内，隔熱 材料62之厚度較佳為25 mm〜50 mm之範圍内。隔熱材料 M7748.doc 201100340 61、62之合計厚度較佳為5〇 mm〜100 mm之範圍内。藉 此’可於有限之設置空間内獲得良好之隔熱效果。 藉由將隔熱材料61、62配置於漏斗21與玻璃熔融爐11之 間’可抑制玻璃熔融爐11對漏斗21之熱輻射，可將漏斗21 内之溫度保持為低於玻璃原料G中所含之水合物之脫水起 始溫度。 第1隔熱材料61係以覆蓋漏斗21之玻璃熔融爐11側之外 0 周面21c之方式設置。藉由以導熱率較低之第1隔熱材料61 覆蓋^•熱率較兩之金屬製漏斗21之外周面2ic，可抑制對 漏斗21内之導熱。 第2隔熱材料62係於第1隔熱材料61與玻璃溶融爐丨丨之間 隔開配置，且配置成大致垂直。藉此，可抑制漏斗21附近 之低溫環境與玻璃熔融爐11附近之高溫環境之間的熱對 流。 其次’對冷卻裝置71進行說明。 Ο 冷卻裝置71係將漏斗21内冷卻之裝置。冷卻裝置71可為 藉由冷卻漏斗21之周壁21d而將漏斗21内冷卻之裝置，亦 可為將漏斗21内之環境冷卻之空調裝置。 作為將漏斗21之周壁21d冷卻之裝置，有自外方向漏斗 21之周壁21d喷附冷媒之冷媒供給裝置、或者使冷媒流入 漏斗21之周壁21d之内部的冷媒供給裝置。 於冷卻裝置71連接有控制裝置28。控制裝置以係根據來 自溫度感測器72及濕度感測器73之輸出信號控制冷卻裝置 71，以使漏斗21内之溫度高於露點溫度且低於玻璃原料g 147748.doc 201100340 中所含之水合物之脫水起始溫度’其中，該溫度感測器72 係檢測漏斗21内之溫度，該濕度感測器73係檢測漏斗21内 之相對濕度。 再者’本實施形態係藉由控制裝置28控制冷卻裝置71， 但亦可藉由手動控制冷卻裝置71。 如以上說明般，根據本實施形態，由於將漏斗2 1内之溫 度保持為低於玻璃原料G中所含之水合物之脫水起始溫 度’因此可抑制漏斗2 1内之玻璃原料G釋放出水合水而變 成塊狀之情況。又，由於將漏斗21内之溫度保持為高於露 點溫度，因此可抑制水滴附著於漏斗2 1之内周面而漏斗2 j 内之玻璃原料G變成塊狀之情況。 圖4係表示圖2之原料供給裝置1 〇之變形例的剖面圖。 圖4之原料供給裝置ι〇Α係利用將連結於馬達81之螺桿82 内设之投料機83代替搬送盤22 ’而將漏斗21A内之玻璃原 料G投入至玻璃熔融爐η之熔融槽14内。 投料機83係形成為筒狀’且配置成大致水平。於投料機 83之一端部安裝有漏斗21Α，另一端部貫通玻璃熔融爐^ 之爐壁而連接於原料投入口 13Α。自漏斗21Α投下至投料 機83之玻璃原料G係藉由利用馬達81之螺桿82之旋轉，於 投料機83内朝向玻璃熔融爐11前進，自原料投入口丨3 a投 下至溶融槽14内。 於該情形時’亦於漏斗21A與玻璃熔融爐11之間配置隔 熱材料61、62 ’藉此可抑制玻璃熔融爐丨丨對漏斗21A之熱 輻射’可將漏斗21A内之溫度保持為低於玻璃原料G中所 147748.doc -14- 201100340 含之水合物之脫水起始溫度。 又’控制裝置28根據來自溫度感測器72及濕度感測器73 之輸出信號控制冷卻裝置71，藉此可將漏斗21A内之溫度 • 保持為尚於露點溫度且低於玻璃原料G令所含之水合物之 脫水起始溫度。 以上，對本發明之一實施形態進行了說明，但本發明並 不限制於上述實施形態，可不脫離本發明之範圍，對上述 0 實施形態附加各種變形及替換。 例如，於本實施形態中，為將漏斗2丨（2丨A)内之溫度設 為特定範圍内，併用隔熱材料61、62及冷卻裝置71，但亦 可使用任一者。於此情形時，只要配置於漏斗2i(2iA)與 玻璃炫融爐11之間即可。 、又，於本實施形態中’代替隔熱材料61、62(或者除此 以外）’亦可配置其他隔熱材料。 又’於本實施形態中，於玻㈣融爐向排列地設置 Ο有複數個（例如，2個）原料供給裝置1〇(1〇Α)，但亦可，置 有1個。 认 入，亦可向漏斗21(21A)内 层内（未圖示），吹入乾燥空氣。 對本發明進行了詳細說明，又參考 πο 可将疋之貫施態樣進行 了忒明，但對於本領域從業人員 月走明白可不脫μ 本發明之精神及範圍附加各種變更或修正。 本申請案係基於2009年6月18日申靖夕α ^ Λ ’吻< W本專利由往 9-U5635開發而成者，將其内容作為參考引用於^ 147748.doc -15· 201100340 中ο 產業上之可利用性 根據本發明’可提供一種可將包含水合物之玻璃原料適 當地投入至玻璃熔融爐之熔融槽的原料供給方法及原料供 給裝置、以及玻璃板之製造装置及製造方法。 【圖式簡單說明】 圖1係表示本發明之一實施形態之玻璃板之製造裝置之 構成的方塊圖。 圖2係用以說明原料供給裝置1〇之構成及動作之剖面 圖，且係表示搬送盤22位於搬送方向上游端之狀能之圖 圖3係用以制原料供給裝置1〇之構成及㈣ 面 圖’且係表示搬送盤22位於搬送方向下游端之狀: 圖4係表示圖2之原料供給裝置 心 。 【主要元件符號·】 剖面圖。 11 12 13 14 15 16 17 10 ' 10A 原料供給裝置 玻璃熔融爐 成形爐 13 A 原料投入口 熔融槽 澄清槽 防塵板 浮動槽 21、21A 漏斗（原料罐） 21a 入口 147748.doc -J6- 201100340The I tank of the raw material tank of the glass smelting furnace is put into the melting tank of the glass melting furnace, and the temperature in the raw material tank is kept higher than the dew point temperature and lower than the hydration contained in the glass raw material. The dehydration starting temperature of the substance. The raw material supply device of the present invention includes a raw material tank provided in a glass-melting furnace, and the glass raw material in the raw material tank is put into a melting tank of the glass melting furnace, and includes a /·/degree maintaining mechanism. The method for maintaining the temperature in the raw material tank is higher than the dew point temperature and lower than the dehydration starting temperature of the hydrate contained in the glass raw material. The manufacturing apparatus of the glass sheet of the present invention comprises: the raw material supply device of the present invention; a glass melting furnace which is melted by a glass raw material supplied from the raw material supply device; and a forming furnace which is formed into a sheet glass by the molten glass which is melted in the glass melting furnace. In the production method, the glass plate is manufactured by using the apparatus for producing a glass plate of the present invention. The effect of the invention provides a raw material supply method and a raw material supply split which can appropriately introduce a glass material containing a hydrate into a melting tank of a glass melting furnace. And a manufacturing apparatus and a manufacturing method of a glass plate. [Embodiment] Hereinafter, the form for carrying out the invention will be described with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the construction of a glazing panel manufacturing apparatus according to an embodiment of the present invention, 147748.doc 201100340, wherein arrows indicate the flow direction of glass frit or molten glass. Fig. 2 is a view for explaining the raw material supply device 10. A cross-sectional view of the structure and the operation. As shown in Fig. 1 and Fig. 2, the apparatus for manufacturing a glass sheet includes a raw material supply device 1 which is used to introduce a powdery or granular glass material (} into the glass melting furnace 11, The glass melting furnace 11 is melted by the glass raw material G supplied from the raw material supply device 1A, and the forming furnace 12 is formed by molding the molten glass L melted by the glass melting furnace 11 into a sheet glass. The melting furnace 11 may be of a well-known configuration, and includes, for example, a raw material injection population 13, a melting tank U, a clarification tank 5, etc. Above the raw material input port, a dustproof plate for preventing the scattering of the glass raw material during the supply of the raw material is provided. 16. Most of the glass raw material G charged from the raw material input port 13 floats on the molten glass L in the molten bath, and the surface moves to the downstream side of the melting tank (on the side of the clarification tank 15). The glass material G is heated during the process of moving to the clarification tank (5) by the flame heat or radiation enthalpy in the glass melting furnace u and the conduction heat from the smelting glass L, and is slowly (four) human (four) glass. Since the glazed glass L is obtained by melting a powdery or granular glass raw material ,, a large amount of air bubbles are contained inside. Therefore, the molten glass 1 is transferred from the melting tank 14 to the clarification tank 15, and the bubbles are floated up. It is removed and then clarified. Further, a vacuum degassing tank may be provided between the clarification tank 15 and the forming furnace 12. The forming furnace 12 may be of a well-known configuration, for example, in the so-called floating method, including the floating tank 17, etc. The clarified glazed glass L is discharged onto the molten metal (for example, molten tin) in the floating U7748.doc 201100340:17, and becomes a plate glass by the surface of the molten metal. The sheet-like glass system-surface is moved to the downstream side-surface of the floating tank 17 to be cooled, thereby producing a glass sheet. Further, in the present embodiment, the forming furnace 12 includes the floating grooves 17 and the like, but the present invention is not limited thereto. For example, in the so-called melting method, the forming furnace includes a molded body having a wedge-shaped cross section that contracts downward. In this case, the molten glass L after the β flows down the both sides of the molded body and merges with the lower edge of the formed body to form a sheet glass. The sheet glass is cooled while being stretched toward the lower side to manufacture a glass sheet. The raw material supply device 1 is attached to the glass melting furnace u (melting tank 14), and a plurality of (for example, two) are arranged in the lateral direction (in Fig. 2, only the solid is shown). Each of the raw material supply devices 10 includes a funnel (raw material tank) 21 which is disposed adjacent to the glass melting furnace 11 and a transfer tray 22 which transports the glass raw material G dropped from the funnel 21 to the glass melting furnace 11. First, the funnel 21 will be described. The funnel 21 is formed of a steel material (e.g., sS (stainless steel) or the like. The funnel 21 is configured to have a cylindrical shape that is tapered toward the lower side, and includes an inlet 21a on the upper side and an outlet 21b on the lower side. The funnel 21 is divided into a plurality of members in the vertical direction, and is expandable and contractible in the vertical direction. Thereby, the position of the transport tray 22 can be adjusted in the up and down direction. Above the funnel inlet 21a, a mixer (not shown) in which a plurality of kinds of raw materials are weighed and mixed to form a glass raw material G is provided. The glass raw material G mixed by the mixer was dropped to the funnel inlet 21a, and stored in a funnel. 147748.doc 201100340 Further, various raw materials before mixing are air-fed to a mixer through a raw material supply pipe (not shown). The inner circumference of the raw material supply pipe is covered with an electroforming brick or the like which is excellent in abrasion resistance. A gap 25 is included between the funnel outlet 21b and the transfer surface 23 of the transfer tray 22. The glass material G in the funnel 21 is transported (dropped) from the gap 25 to the transport surface 23. The size of the gap 25, the inclination angle θ of the conveying surface 23 with respect to the horizontal plane, and the angle of repose of the glass material G are set so that the glass raw material G is appropriately conveyed to the conveying surface 23. The inclination angle θ (refer to Fig. 2) of the conveying surface 23 with respect to the horizontal plane is set to 8 to 15 degrees, preferably 10. ~12. Within the scope. The static angle of the glass raw material G was set to 30. ~45. Preferably, it is 35. ~40. Within the scope. Here, the angle of repose is obtained by a method described in JIS R 9301_2_2 "Alumina powder_Part 2: Physical property measurement method-2: Angle of repose". More specifically, the angle of repose is defined by the following method. The powder with better fluidity has a smaller value: one side has a diameter of 8 mm and the mesh is 7 i 〇Ο μίη2 sieve vibration, and the surface is tested. The body (the glass material G before storage in the funnel 21) passes through the sieve, and the funnel is lowered from a height of 16 mm from the horizontal plane to a platform having a diameter of 80 mm, and the test body is formed. The angle between the busbar of the cone and the horizontal plane. Here, the amount of drop of the powder is the amount that falls until the angle of repose is substantially stabilized. Next, the transfer tray 22 will be described. The transfer tray 22 is formed of a steel material (for example, an SS material) or the like. The transfer tray 22 includes a flat body 31. The upper surface of the main body 31 serves as a conveying surface 23 for carrying the glass raw material G dropped from the funnel 21. A pair of side 147748.doc 201100340 plates 32 are protruded from the conveying surface 23 so as not to slide the glass raw material g on the conveying surface 23 in a direction orthogonal to the conveying direction. Since the conveying surface 23 of the conveying tray 22 is an inclined surface, the front end portion 22a is often inserted into the glass melting furnace from the raw material inlet 13 so that the glass raw material G can be slid from the conveying surface 23 by the inclination, and can be put into Inside the melting tank 14. The transfer tray 22 is configured to reciprocate between the upstream end (retracted position) in the transport direction and the downstream end (forward position) in the transport direction. The transfer tray 22 includes a plurality of wheels 34 that are movable over a pair of rails 26. The guide rail 26 is supported by the frame 27, and guides the transfer tray 22 in the glass melting furnace u in the direction of the front low rear height. Therefore, the conveying surface 23 of the conveying tray 22 is an inclined surface which is lowered toward the front side in the glass melting furnace 11. For example, as shown in FIG. 2 and FIG. 3, each of the raw material supply devices 1 includes a motor 41 fixed to the frame 27, a rotating circular plate attached to a rotating shaft of the motor 41, and a rod 43 as a forward and backward for advancing and retracting the transfer tray 22. The mechanism 4 is rotatably coupled to one end of the rod 43 at the centrifugal position of the rotating circular plate. The other end of the rod 43 is rotatably coupled to the transfer tray 22. The motor 41 is connected to a control device 28 such as a computer. Under the control of the control unit 28, when the rotating circular plate 42 is rotated by the spinning operation of the motor 41, one end of the rod 43 is rotated around the center of rotation of the rotating circular plate 42. Along with this, the other end portion of the rod 43 swings and the transfer tray 22 coupled to the other end portion of the rod 43 reciprocates on the guide rail 26. For example, as shown in Fig. 2, each of the raw material supply devices 1 includes a moving carriage η and an elevating device 52 mounted on the moving cart 51 as an adjustment mechanism for adjusting the relative position of the guide rail % and the molten I47748.doc 10-201100340 slot 14. The moving carriage 51 is configured to move in a direction approaching and away from the glass melting furnace 11 (melting tank 14). The lifting device 52 includes a supporting portion 53 that supports the frame 27 from the lower surface side, and a driving device 54 that lifts the supporting portion 53. As the driving device 54, for example, a hydraulic jack can be used. Next, the operation of the transport tray 22 will be described with reference to Figs. 2 and 3 . Further, the operations of the first and second steps described below are performed under the control of the control device 28, and are repeatedly executed every predetermined period (for example, a period of 1 minute to 10 minutes). In the first step, as indicated by an arrow in Fig. 2, the transfer tray 22 advances from the backward position to the advanced position. As a result, the conveying surface 23 advances, so that the glass raw material G is transferred (dropped) from the conveying surface 23 and the gap 25 of the funnel outlet 21b to the conveying surface 23. Further, during the advancement of the transfer tray 22, the glass raw material G on the transfer surface 23 is stably carried on the transfer surface 23 by friction. In the second step, as indicated by an arrow in Fig. 3, the transfer tray 22 is retracted from the forward position to the backward position. Along with this, the glass raw material G 上 on the conveying surface 23 is pressed and dropped into the melting tank 14. Thus, the glass raw material G in the funnel 21 is dropped to the glass melting furnace 11 at a supply rate of, for example, 3 tons/hour to 13 tons/min%, preferably 〇5 tons/hour to 镇... town/hour. Inside the melting tank 14. Each of the raw material supply devices Η) further includes a temperature maintaining mechanism that maintains the temperature in the funnel 21 above the dew point temperature and below the dehydration onset temperature of the hydrate contained in the glass raw material G (preferably The dehydration starting temperature of the hydrate is lower _ above). Here, the so-called dehydration initiation temperature is due to the heating, and the hydrated water (in other words, the crystal water) starts to desorb from the hydrate at a temperature of 147748.doc -13 - 201100340. When the temperature in the funnel 21 is equal to or lower than the dew point temperature, the water droplets adhere to the inner peripheral surface of the funnel 21 and the glass raw material G ft in the funnel 21 is formed into a block shape. Further, since the temperature in the funnel 21 is usually higher than the temperature in the glass raw material supply pipe due to the radiant heat from the glass melting furnace 11, it is higher than the dew point temperature. On the other hand, when the temperature in the funnel 2 1 is equal to or higher than the dehydration starting temperature of the water a contained in the glass raw material θ, there is a case where the glass raw material G in the funnel 21 releases water of hydration. It becomes a block. When the hydrate contained in the glass raw material G is boric acid (Η3Β〇3), it is preferable to set the temperature in the bucket 21 to 2 (TC~60., t is preferably set to 20 °C). ~50 ° C. Each raw material supply, 'Ό device 1 〇 includes heat insulating material 6 丨, and cooling device 71 as a temperature holding mechanism. First, the heat insulating materials 61 and 62 will be described. It is disposed between the funnel 2 1 and the glass melting furnace 11. The heat insulating materials 61 and 62 are preferably made of a material y having a thermal conductivity of 〇2〇w/m κ or less as the heat insulating material 6 1 , 62 , for example, Use Taojing fiber, insulation board or heat insulation sheet (rubber), rock wool, heat-insulating refractory brick. In these, 'ceramic fiber insulation board is light, easy to process, and easy to shape. The heat insulating materials 61 and 62 may be formed of the same material or different materials. The thickness of the heat insulating material 61 is preferably in the range of 25 mm to 50 mm, and the thickness of the heat insulating material 62 is relatively high. Preferably, the thickness is in the range of 25 mm to 50 mm. The total thickness of the insulating material M7748.doc 201100340 61, 62 is preferably 5 〇 mm to 100 mm. In this way, a good thermal insulation effect can be obtained in a limited installation space. By disposing the heat insulating materials 61, 62 between the funnel 21 and the glass melting furnace 11, the glass melting furnace 11 can be inhibited from the funnel 21 The heat radiation can maintain the temperature in the funnel 21 below the dehydration initiation temperature of the hydrate contained in the glass raw material G. The first heat insulating material 61 is disposed outside the glass melting furnace 11 side of the funnel 21. The circumferential surface 21c is provided in such a manner that the outer surface 2ic of the metal funnel 21 having a lower heat rate is covered by the first heat insulating material 61 having a lower thermal conductivity, thereby preventing heat conduction into the funnel 21. The heat material 62 is disposed between the first heat insulating material 61 and the glass melting furnace, and is disposed substantially vertically. Thereby, the low temperature environment in the vicinity of the funnel 21 and the high temperature environment in the vicinity of the glass melting furnace 11 can be suppressed. Next, the cooling device 71 will be described. The cooling device 71 is a device for cooling the inside of the funnel 21. The cooling device 71 may be a device for cooling the inside of the funnel 21 by the peripheral wall 21d of the cooling funnel 21, or To cool the environment inside the funnel 21 The air conditioner is a refrigerant supply device that sprays the refrigerant from the peripheral wall 21d of the outer funnel 21 or a refrigerant supply device that allows the refrigerant to flow into the inside of the peripheral wall 21d of the funnel 21 as a device for cooling the peripheral wall 21d of the funnel 21. 71 is connected to the control device 28. The control device controls the cooling device 71 according to the output signals from the temperature sensor 72 and the humidity sensor 73 so that the temperature in the funnel 21 is higher than the dew point temperature and lower than the glass material g 147748. The temperature of the dehydration initiation temperature of the hydrate contained in .doc 201100340, wherein the temperature sensor 72 detects the temperature in the funnel 21, and the humidity sensor 73 detects the relative humidity in the funnel 21. Further, in the present embodiment, the cooling device 71 is controlled by the control device 28, but the cooling device 71 can be manually controlled. As described above, according to the present embodiment, since the temperature in the funnel 2 1 is kept lower than the dehydration starting temperature of the hydrate contained in the glass raw material G, the release of the glass raw material G in the funnel 2 1 can be suppressed. The case where water is hydrated and becomes a block. Further, since the temperature in the funnel 21 is kept higher than the dew point temperature, it is possible to prevent the water droplets from adhering to the inner peripheral surface of the funnel 2 1 and the glass raw material G in the funnel 2 j to be in a block shape. Fig. 4 is a cross-sectional view showing a modification of the material supply device 1 of Fig. 2; In the raw material supply device of Fig. 4, the glass material G in the funnel 21A is placed in the melting tank 14 of the glass melting furnace η by replacing the transfer tray 22' with a feeder 83 provided in the screw 82 connected to the motor 81. . The feeder 83 is formed in a cylindrical shape and is disposed substantially horizontally. A funnel 21 is attached to one end of the feeder 83, and the other end is connected to the raw material input port 13 through the furnace wall of the glass melting furnace. The glass material G which has been dropped from the funnel 21 to the feeder 83 is advanced in the feeder 83 toward the glass melting furnace 11 by the rotation of the screw 82 of the motor 81, and is dropped from the raw material inlet port 3a into the melting tank 14. In this case, 'the heat insulating material 61, 62' is also disposed between the funnel 21A and the glass melting furnace 11, whereby the heat radiation of the glass melting furnace to the funnel 21A can be suppressed, and the temperature in the funnel 21A can be kept low. The dehydration onset temperature of the hydrate contained in 147748.doc -14- 201100340 in glass raw material G. Further, the control device 28 controls the cooling device 71 based on the output signals from the temperature sensor 72 and the humidity sensor 73, whereby the temperature in the funnel 21A can be maintained at a dew point temperature and lower than the glass material G. The dehydration onset temperature of the hydrate contained therein. Although an embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications and alterations may be added to the above-described embodiment without departing from the scope of the invention. For example, in the present embodiment, the temperature in the funnel 2 (2丨A) is set to a specific range, and the heat insulating materials 61 and 62 and the cooling device 71 are used, but any of them may be used. In this case, it is only required to be disposed between the funnel 2i (2iA) and the glass melting furnace 11. Further, in the present embodiment, other heat insulating materials may be disposed instead of the heat insulating materials 61 and 62 (or other than the above). Further, in the present embodiment, a plurality of (for example, two) raw material supply devices 1 (1) are provided in the glass (four) melting furnace, but one may be provided. It is also possible to blow in dry air into the inner layer (not shown) of the funnel 21 (21A). The present invention has been described in detail with reference to the preferred embodiments of the invention, and various modifications and changes can be made in the spirit and scope of the invention. This application is based on June 18, 2009, Shen Jingxi α ^ Λ 'Kiss < W This patent was developed from 9-U5635, and its contents are cited in ^ 147748.doc -15· 201100340 INDUSTRIAL APPLICABILITY According to the present invention, a raw material supply method and a raw material supply device capable of appropriately feeding a glass material containing a hydrate into a melting tank of a glass melting furnace, and a glass plate manufacturing apparatus and manufacturing method can be provided. . BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram showing the configuration of a manufacturing apparatus for a glass sheet according to an embodiment of the present invention. 2 is a cross-sectional view for explaining the configuration and operation of the raw material supply device 1 and showing the energy of the transfer tray 22 at the upstream end in the transport direction. FIG. 3 is a configuration of the raw material supply device 1 and (4) The plan view shows the state in which the transfer tray 22 is located at the downstream end in the transport direction. Fig. 4 shows the center of the material supply device of Fig. 2. [Main component symbol ·] Sectional view. 11 12 13 14 15 16 17 10 ' 10A Raw material supply unit Glass melting furnace Forming furnace 13 A Raw material input port Melting tank Clarifying tank Dust-proof plate Floating tank 21, 21A Funnel (raw material tank) 21a Entrance 147748.doc -J6- 201100340
21b 出口 21c 外周面 21d 周壁 22 搬送盤 22a 前端部 23 搬送面 25 間隙 26 導軌 27 機架 28 控制裝置 31 本體 32 侧板 34 車輪 40 進退機構 41 馬達 42 旋轉圓板 43 桿 51 移動台車 52 升降裝置 53 支撐部 54 驅動裝置 61 > 62 隔熱材料 71 冷卻裝置 72 溫度感測器 147748.doc -17- 201100340 73 濕度感測器 81 馬達 82 螺桿 83 投料機 G 玻璃原料 L 熔融玻璃 Θ 傾斜角 147748.doc - 18-21b outlet 21c outer peripheral surface 21d peripheral wall 22 transport tray 22a front end portion 23 transport surface 25 gap 26 rail 27 frame 28 control device 31 body 32 side plate 34 wheel 40 advancing and retracting mechanism 41 motor 42 rotating disc 43 rod 51 moving cart 52 lifting device 53 Support 54 Driving device 61 > 62 Thermal insulation 71 Cooling device 72 Temperature sensor 147748.doc -17- 201100340 73 Humidity sensor 81 Motor 82 Screw 83 Feeder G Glass material L Molten glass 倾斜 Tilt angle 147748 .doc - 18-