TWI474987B - A molten glass supply device - Google Patents
A molten glass supply device Download PDFInfo
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- TWI474987B TWI474987B TW100114943A TW100114943A TWI474987B TW I474987 B TWI474987 B TW I474987B TW 100114943 A TW100114943 A TW 100114943A TW 100114943 A TW100114943 A TW 100114943A TW I474987 B TWI474987 B TW I474987B
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- molten glass
- flow path
- path control
- supply device
- control shutter
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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
- C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
- C03B5/265—Overflows; Lips; Tweels
- C03B5/267—Overflows; Lips; Tweels specially adapted for supplying the float tank
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
-
- 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
- C03B5/26—Outlets, e.g. drains, siphons; Overflows, e.g. for supplying the float tank, tweels
-
- 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
- C03B7/02—Forehearths, i.e. feeder channels
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Compositions (AREA)
Description
本發明係關於一種將熔融玻璃供給至浮法玻璃製造裝置之浮法玻璃金屬液槽之裝置。The present invention relates to a device for supplying molten glass to a float glass metal bath of a float glass manufacturing apparatus.
浮法玻璃係藉由將於熔融玻璃製作區域中製造之熔融玻璃移送至浮法玻璃金屬液槽之熔融玻璃供給部，並將該熔融玻璃供給至浮法玻璃金屬液槽之熔融金屬(代表性的是熔融錫)上，而成形為帶狀玻璃。如圖8所示，熔融玻璃供給裝置將以供給管21送至熔融玻璃供給部22之熔融玻璃，一面利用配置於供給管21之終端之流道控制閘板20調整熔融玻璃之流量，一面製成熔融玻璃層23，而供給至浮法玻璃金屬液槽(專利文獻1)。The float glass is transferred to the molten glass supply portion of the float glass metal liquid tank by the molten glass produced in the molten glass production region, and the molten glass is supplied to the molten metal of the float glass metal liquid tank (representative It is made of molten tin) and formed into a ribbon glass. As shown in Fig. 8, the molten glass supply device supplies the molten glass supplied to the molten glass supply unit 22 by the supply pipe 21, and adjusts the flow rate of the molten glass by the flow path control shutter 20 disposed at the end of the supply pipe 21. The molten glass layer 23 is supplied to a float glass molten metal bath (Patent Document 1).
專利文獻1：日本專利特表2005-527450號公報Patent Document 1: Japanese Patent Laid-Open Publication No. 2005-527450
如圖8所示，熔融玻璃供給裝置之流道控制閘板20接近作為供給管21之終端的開口部24且上下可動地配置，藉由改變該流道控制閘板20之高度位置，而進行熔融玻璃流量之調整。上述流道控制閘板20為包含耐熱性材料之矩形板狀體，其係使平面27對向於供給管之開口部24而配置，自該開口部24送出之熔融玻璃通過流道控制閘板下端而供給至浮法玻璃金屬液槽。As shown in Fig. 8, the flow path control shutter 20 of the molten glass supply device is disposed close to the opening 24 as the terminal end of the supply pipe 21, and is vertically movable, and is changed by changing the height position of the flow path control shutter 20. Adjustment of the flow rate of molten glass. The flow path control shutter 20 is a rectangular plate-shaped body including a heat-resistant material, and the flat surface 27 is disposed to face the opening portion 24 of the supply tube, and the molten glass sent from the opening portion 24 passes through the flow path control shutter. The lower end is supplied to the float glass metal bath.
於此情形時，為使熔融玻璃順利地流動，一般係使流道控制閘板20之下端形成為曲面形狀25。然而，由於先前之流道控制閘板如圖8所示僅使下端部之前端部分形成為曲面形狀，故曲面形狀之上側之熔融玻璃因流道控制閘板20之平面27而阻止流動。其結果，鄰接於供給管21之上部28與流道控制閘板20的平面27之區域之熔融玻璃之流動延遲或滯留。圖8之斜線部29表示該熔融玻璃之流動延遲或滯留之區域(以下，稱為滯留區域)。In this case, in order to smoothly flow the molten glass, the lower end of the flow path control shutter 20 is generally formed into a curved shape 25. However, since the previous flow path control shutter has only the front end portion of the lower end portion formed into a curved shape as shown in Fig. 8, the molten glass on the upper side of the curved shape shape is prevented from flowing due to the plane 27 of the flow path control shutter 20. As a result, the flow of the molten glass adjacent to the region between the upper portion 28 of the supply pipe 21 and the plane 27 of the flow path control shutter 20 is delayed or retained. The hatched portion 29 of Fig. 8 indicates a region in which the flow of the molten glass is delayed or retained (hereinafter referred to as a retention region).
以供給管送來之熔融玻璃之大部分於滯留區域外流動而供給至浮法玻璃金屬液槽。另一方面，滯留區域之熔融玻璃由於流動之延遲或滯留而溫度或玻璃成分比例發生變化，因此若混入至於滯留區域外流動之熔融玻璃，則會成為異質之熔融玻璃。使該異質之熔融玻璃成形為浮板玻璃時，有成為條紋(streak)等缺點之虞。尤其是LCD(liquid crystal display，液晶顯示器)玻璃基板用之無鹼玻璃，與用於建築用途等之鈉鈣玻璃相比，熔融溫度較高，一部分玻璃成分易揮發，而另一方面要求高品質。Most of the molten glass sent from the supply pipe flows outside the retained area and is supplied to the float glass metal bath. On the other hand, the molten glass in the retention region changes in temperature or the proportion of the glass component due to the delay or retention of the flow. Therefore, if it is mixed into the molten glass flowing outside the retained region, it becomes a heterogeneous molten glass. When the heterogeneous molten glass is formed into a floating glass, there is a disadvantage that it becomes a streak. In particular, an alkali-free glass for a liquid crystal display (LCD) glass substrate has a higher melting temperature than a soda lime glass used for architectural purposes, and a part of the glass component is volatile, and on the other hand, high quality is required. .
本發明係鑒於上述課題而成者，其目的在於提供一種可防止生成異質之熔融玻璃之熔融玻璃供給裝置。The present invention has been made in view of the above problems, and an object thereof is to provide a molten glass supply device capable of preventing generation of a heterogeneous molten glass.
本發明提供一種熔融玻璃供給裝置，其包括：用以將熔融玻璃自熔融玻璃製作區域移送至浮法玻璃金屬液槽之供給管；及可升降地設置於該供給管之下游側之開口部，用以調節向上述浮法玻璃金屬液槽之熔融玻璃供給量之流道控制閘板；且上述流道控制閘板於上述開口部側具有形成為圓狀之區域，於將上述開口部之寬度方向中央之上下方向尺寸設為h之情形時，上述形成為圓狀之區域之上下方向尺寸為0.4 h以上。The present invention provides a molten glass supply device comprising: a supply pipe for transferring molten glass from a molten glass production region to a float glass metal liquid tank; and an opening portion that is vertically movable on a downstream side of the supply pipe, a flow path control shutter for adjusting a supply amount of molten glass to the float glass metal liquid tank; and the flow path control shutter has a circularly formed region on the opening side, and the width of the opening portion is When the dimension in the direction of the center of the direction is h, the dimension of the upper and lower sides of the circular region is 0.4 h or more.
本發明之熔融玻璃供給裝置，較佳為於將最下作業位置之上述流道控制閘板與上述供給管之周壁之間隙設為M時，最上作業位置之上述流道控制閘板與上述供給管之周壁之最大間隙為M以上1.3 M以下。In the molten glass supply device of the present invention, preferably, when the gap between the flow path control shutter of the lowermost working position and the peripheral wall of the supply pipe is M, the flow path control shutter and the supply at the uppermost working position are preferably The maximum gap of the peripheral wall of the tube is M or more and 1.3 M or less.
又，本發明之熔融玻璃供給裝置，較佳為上述形成為圓狀之區域之至少一部分係曲率半徑R為1.0 h以下之曲面。Further, in the molten glass supply device of the present invention, it is preferable that at least a part of the region formed in the circular shape has a curved surface having a curvature radius R of 1.0 h or less.
又，本發明之熔融玻璃供給裝置，較佳為上述間隙M滿足0<M≦30 mm，上述上下方向尺寸h滿足30≦h≦300 mm。Further, in the molten glass supply device of the present invention, it is preferable that the gap M satisfies 0 < M ≦ 30 mm, and the vertical dimension h satisfies 30 ≦ h ≦ 300 mm.
又，本發明之熔融玻璃供給裝置，較佳為上述流道控制閘板之至少一部分以鉑或鉑合金包覆。Further, in the molten glass supply device of the present invention, it is preferable that at least a part of the flow path control shutter is covered with platinum or a platinum alloy.
又，本發明之熔融玻璃供給裝置，較佳為藉由通電加熱將上述流道控制閘板保持於固定溫度。Further, in the molten glass supply device of the present invention, it is preferable that the flow path control shutter is held at a fixed temperature by energization heating.
又，本發明之熔融玻璃供給裝置，較佳為將上述開口部配置於較上述玻璃製作區域之熔融玻璃位準更低之位置，Further, in the molten glass supply device of the present invention, it is preferable that the opening is disposed at a position lower than a position of a molten glass in the glass production region.
上述供給管具有自上游側向下游側以特定之角度於寬度方向上擴展之扇形狀部。The supply pipe has a fan-shaped portion that expands in the width direction at a specific angle from the upstream side to the downstream side.
本發明之熔融玻璃供給裝置，較佳為上述形成為圓狀之區域之上下方向尺寸為0.7 h以上。In the molten glass supply device of the present invention, it is preferable that the upper and lower dimensions of the region formed in a circular shape are 0.7 h or more.
又，本發明之熔融玻璃供給裝置，較佳為上述熔融玻璃包含以氧化物基準之質量百分率表示而含有下述成分之無鹼玻璃。Further, in the molten glass supply device of the present invention, it is preferable that the molten glass contains an alkali-free glass which is represented by a mass percentage based on an oxide and contains the following components.
SiO2 ：50~66%SiO 2 : 50~66%
Al2 O3 ：10.5~24%Al 2 O 3 : 10.5~24%
B2 O3 ：0~12%B 2 O 3 : 0~12%
MgO：0~8%MgO: 0~8%
CaO：0~14.5%CaO: 0~14.5%
SrO：0~24%SrO: 0~24%
BaO：0~13.5%BaO: 0~13.5%
MgO+CaO+SrO+BaO：9~29.5%MgO+CaO+SrO+BaO: 9~29.5%
ZrO2 ：0~5%ZrO 2 : 0~5%
又，本發明之熔融玻璃供給裝置，較佳為上述熔融玻璃包含以氧化物基準之質量百分率表示而含有下述成分之無鹼玻璃。Further, in the molten glass supply device of the present invention, it is preferable that the molten glass contains an alkali-free glass which is represented by a mass percentage based on an oxide and contains the following components.
SiO2 ：58~66%SiO 2 : 58~66%
Al2 O3 ：15~22%Al 2 O 3 : 15~22%
B2 O3 ：5~12%B 2 O 3 : 5~12%
MgO：0~8%MgO: 0~8%
CaO：0~9%CaO: 0~9%
SrO：3~12.5%SrO: 3~12.5%
BaO：0~2%BaO: 0~2%
MgO+CaO+SrO+BaO：9~18%MgO+CaO+SrO+BaO: 9~18%
根據本發明，可藉由將熔融玻璃以溫度及組成均勻之狀態供給至浮法玻璃金屬液槽，而獲得高品質之浮法玻璃。According to the present invention, high-quality float glass can be obtained by supplying molten glass to a float glass metal bath in a state where the temperature and composition are uniform.
以下，參照圖示對本發明之實施形態進行說明。再者，於本說明書中，所謂「上方」，係表示垂直上方；所謂「下方」，係表示垂直下方。Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in this specification, the "upper" means the vertical upper side, and the "lower side" means the vertical direction.
圖1為本發明之一實施形態之熔融玻璃供給裝置之剖面說明圖，圖2(A)為該熔融玻璃供給裝置之供給管之平面圖。如圖1所示，利用供給管1將熔融玻璃製作區域6中所獲得之熔融玻璃自熔融玻璃製作區域6移送至浮法玻璃金屬液槽7之熔融玻璃供給部5，自該熔融玻璃供給部5供給至浮法玻璃金屬液槽7之熔融錫9上而成形為浮法玻璃10。更具體而言，將於熔融玻璃製作區域6中使玻璃原料熔解所獲得之熔融玻璃進而於熔融玻璃製作區域6中充分地澄清，並且冷卻至可獲得適於浮法玻璃之成形之黏度的特定溫度後，利用供給管1自熔融玻璃製作區域6取出而移送至熔融玻璃供給部5。並且，將所移送之熔融玻璃利用設置於該熔融玻璃供給部5之流道控制閘板8調整熔融玻璃量，製成平坦且厚度固定之熔融玻璃層，於熔融玻璃供給部5之唇磚13上流動，並於該唇磚13溢流而供給至浮法玻璃金屬液槽7之熔融錫9上。Fig. 1 is a cross-sectional explanatory view of a molten glass supply device according to an embodiment of the present invention, and Fig. 2(A) is a plan view showing a supply pipe of the molten glass supply device. As shown in Fig. 1, the molten glass obtained in the molten glass production region 6 is transferred from the molten glass production region 6 to the molten glass supply portion 5 of the float glass metal liquid tank 7 by the supply pipe 1, from the molten glass supply portion. 5 is supplied to the molten tin 9 of the float glass metal bath 7, and is formed into the float glass 10. More specifically, the molten glass obtained by melting the glass raw material in the molten glass production region 6 is further sufficiently clarified in the molten glass production region 6, and cooled to obtain a specific viscosity suitable for the formation of the float glass. After the temperature, the supply pipe 1 is taken out from the molten glass production region 6 and transferred to the molten glass supply portion 5. Then, the molten glass to be transferred is adjusted to the amount of molten glass by the flow path control shutter 8 provided in the molten glass supply unit 5, and a molten glass layer having a flat and fixed thickness is formed, and the lip brick 13 of the molten glass supply unit 5 is formed. The upper flow flows, and the lip brick 13 overflows and is supplied to the molten tin 9 of the float glass metal liquid tank 7.
於本發明中，熔融玻璃製作區域6係實施玻璃原料之熔解、熔解所獲得之熔融玻璃之澄清及冷卻等之部位的總稱，但取出熔融玻璃係如上所述實施澄清或冷卻後之步驟。In the present invention, the molten glass production region 6 is a general term for the portion where the molten glass is melted and melted, and the molten glass is clarified and cooled. However, the molten glass is taken out as a step of clarification or cooling as described above.
再者，例如，本發明之熔融玻璃較佳為包含以氧化物基準之質量百分率表示而含有下述成分之無鹼玻璃。Further, for example, the molten glass of the present invention preferably contains an alkali-free glass which is represented by a mass percentage based on an oxide and contains the following components.
SiO2 ：50~66%SiO 2 : 50~66%
Al2 O3 ：10.5~24%Al 2 O 3 : 10.5~24%
B2 O3 ：0~12%B 2 O 3 : 0~12%
MgO：0~8%MgO: 0~8%
CaO：0~14.5%CaO: 0~14.5%
SrO：0~24%SrO: 0~24%
BaO：0~13.5%BaO: 0~13.5%
MgO+CaO+SrO+BaO：9~29.5%MgO+CaO+SrO+BaO: 9~29.5%
ZrO2 ：0~5%ZrO 2 : 0~5%
又，本發明之熔融玻璃，較佳為包含以氧化物基準之質量百分率表示而含有下述成分之無鹼玻璃。Further, the molten glass of the present invention preferably contains an alkali-free glass containing the following components in terms of a mass percentage based on an oxide.
SiO2 ：58~66%SiO 2 : 58~66%
Al2 O3 ：15~22%Al 2 O 3 : 15~22%
B2 O3 ：5~12%B 2 O 3 : 5~12%
MgO：0~8%MgO: 0~8%
CaO：0~9%CaO: 0~9%
SrO：3~12.5%SrO: 3~12.5%
BaO：0~2%BaO: 0~2%
MgO+CaO+SrO+BaO：9~18%MgO+CaO+SrO+BaO: 9~18%
其次，對流道控制閘板8進行說明。圖3為表示流道控制閘板8之一例之立體圖。流道控制閘板8之主要部為以二氧化矽玻璃陶瓷(熔融二氧化矽)等耐熱構件製作之矩形板狀體，經由安裝於上部之金屬件15以懸吊棒16吊持，於浮法玻璃金屬液槽之熔融玻璃供給部5，使板狀體之側面對向於上述供給管1之開口部12並可升降地設置。圖4為圖1之熔融玻璃供給部5之部分放大圖。為如上所述調節供給至浮法玻璃金屬液槽之熔融玻璃之供給量，使對向於開口部12而配置之流道控制閘板8相對於開口部12升降。於將上述開口部12之寬度b之中央部之上下方向尺寸設為h時，流道控制閘板8之下緣X自配置於與開口部12之下部相同位準之唇磚13之上表面起，根據熔融玻璃之供給量，於0.1 h~0.5 h、較佳為0.1 h~0.3 h之範圍內升降而改變高度。再者，所謂0.1 h，係表示h之0.1倍，即0.1×h，以下相同。於通常之生產時，使流道控制閘板8下降至0.1 h，但於生產開始時或停機時，使其下降至0 h。將上升至0.5 h之位置稱作最上作業位置，將下降至0 h之位置稱作最下作業位置。開口部12之上下方向尺寸h通常較佳為30~300 mm。該流道控制閘板8具有與開口部12之寬度b大致相同之寬度，可藉由使其上下運動來改變高度位置，而調節供給至浮法玻璃金屬液槽7之熔融玻璃流量。又，亦可藉由使其降低至最下作業位置，使向浮法玻璃金屬液槽之熔融玻璃之供給停止。Next, the flow path control shutter 8 will be described. Fig. 3 is a perspective view showing an example of the flow path control shutter 8. The main portion of the flow path control shutter 8 is a rectangular plate-like body made of a heat-resistant member such as cerium oxide glass ceramic (melted cerium oxide), and is suspended by a hanging rod 16 via a metal member 15 attached to the upper portion. The molten glass supply unit 5 of the method glass metal liquid tank is disposed such that the side surface of the plate-like body faces the opening portion 12 of the supply tube 1 and is movable up and down. Fig. 4 is a partial enlarged view of the molten glass supply unit 5 of Fig. 1 . In order to adjust the supply amount of the molten glass supplied to the float glass metal liquid tank as described above, the flow path control shutter 8 disposed opposite to the opening portion 12 is moved up and down with respect to the opening portion 12. When the upper and lower dimensions of the central portion of the width b of the opening portion 12 are h, the lower edge X of the flow path control shutter 8 is disposed on the upper surface of the lip tile 13 which is the same level as the lower portion of the opening portion 12. From the supply amount of the molten glass, the height is changed by raising and lowering in the range of 0.1 h to 0.5 h, preferably 0.1 h to 0.3 h. Further, the term "0.1 h" means 0.1 times h, that is, 0.1 x h, which is the same below. At normal production, the runner control gate 8 is lowered to 0.1 h, but at the beginning of production or at shutdown, it is lowered to 0 h. The position rising to 0.5 h is referred to as the uppermost working position, and the position falling to 0 h is referred to as the lowermost working position. The dimension h of the upper and lower sides of the opening portion 12 is usually preferably 30 to 300 mm. The flow path control shutter 8 has a width substantially the same as the width b of the opening portion 12, and the flow position of the molten glass supplied to the float glass metal liquid tank 7 can be adjusted by changing the height position by moving it up and down. Further, the supply to the molten glass in the float glass metal bath can be stopped by lowering it to the lowermost working position.
最下作業位置之上述流道控制閘板8與供給管1之周壁19之間隙M較佳為滿足0<M≦30 mm，更佳為滿足0<M≦20 mm。為避免以供給管1密閉並送至熔融玻璃供給部5之熔融玻璃於熔融玻璃供給部5中接觸周圍空氣，間隙M較小較好。其原因在於，若該間隙M較大，則使熔融玻璃冷卻，或導致一部分玻璃成分揮發。The gap M between the above-described flow path control shutter 8 and the peripheral wall 19 of the supply pipe 1 at the lowermost working position preferably satisfies 0 < M ≦ 30 mm, and more preferably satisfies 0 < M ≦ 20 mm. In order to prevent the molten glass supplied to the molten glass supply unit 5 from being sealed by the supply pipe 1 from contacting the surrounding air in the molten glass supply unit 5, the gap M is preferably small. The reason for this is that if the gap M is large, the molten glass is cooled or a part of the glass component is volatilized.
再者，間隙M亦可為最下作業位置之流道控制閘板8與供給管1之周壁19之間之最小間隙。Further, the gap M may be the minimum gap between the flow path control shutter 8 of the lowermost working position and the peripheral wall 19 of the supply pipe 1.
本發明使流道控制閘板8之至少對向於上述開口部12之下部形成為圓形狀，以使熔融玻璃供給部5中不產生滯留區域。In the present invention, at least the lower portion of the flow path control shutter 8 facing the opening portion 12 is formed in a circular shape so that a stagnant region is not generated in the molten glass supply portion 5.
本發明至少使自對向於上述流道控制閘板8之開口部12之側的下緣(點X)至高度(上下方向尺寸)為d之點Y的區域(區域32)形成為圓形狀。即，流道控制閘板8之開口部12側之面30，於下部具有形成為圓狀之區域32，該區域32之上下方向尺寸d為0.4 h以上。d較佳為0.5 h以上，進而較佳為0.7 h以上。According to the present invention, at least a region (region 32) from a lower edge (point X) to a side of the opening portion 12 of the flow path control shutter 8 to a point (h) in which the height (up and down direction dimension) is d is formed into a circular shape. . That is, the surface 30 on the side of the opening portion 12 of the flow path control shutter 8 has a circularly formed region 32 at the lower portion, and the dimension d in the upper and lower directions of the region 32 is 0.4 h or more. d is preferably 0.5 h or more, and more preferably 0.7 h or more.
此處，所謂圓狀，係指向下方凸起之曲面狀之一部分，即越向下方行進越朝向下游側之形狀。除如本例單一之曲率半徑R(以下，亦將「曲率半徑R」記載為R)之圓弧面狀以外，圓狀亦可為包含具有不同曲率半徑R之複數個圓弧面之弧面狀，亦可為橢圓弧面狀。又，於該等曲面之剖面的一部分中亦可具有少許之直線部。Here, the circular shape is a part of a curved surface that is convex downward, that is, a shape that goes toward the downstream side as it goes downward. In addition to the circular arc shape of the single curvature radius R (hereinafter, the curvature radius R is also described as R), the circular shape may be a curved surface including a plurality of circular arc surfaces having different curvature radii R. It can also be an elliptical arc. Further, a part of the cross section of the curved surfaces may have a slight straight portion.
本發明因自開口部12送出之熔融玻璃與形成為流道控制閘板8之該圓形狀之曲面擋接，故於熔融玻璃供給部5中不會產生滯留區域，且可使熔融玻璃沿流道控制閘板8之曲面流動。又，因於如圖7所示使流道控制閘板8上升至0.5 h之最上作業位置時，若設置為如將供給管1之開口部12與流道控制閘板8之最大間隙M'抑制於1.3 M(M為最下作業位置之流道控制閘板8與開口部12之間隙)以下之R，則可使停滯於開口部12與流道控制閘板8之間隙中之熔融玻璃為最小限度，故較佳。According to the present invention, since the molten glass sent from the opening portion 12 is in contact with the circular curved surface formed as the flow path control shutter 8, the retained area is not generated in the molten glass supply portion 5, and the molten glass can be flowed along the flow. The curved surface of the gate control gate 8 flows. Further, since the flow path control shutter 8 is raised to the uppermost working position of 0.5 h as shown in Fig. 7, if it is set to the maximum clearance M' of the opening portion 12 of the supply pipe 1 and the flow path control shutter 8, Suppressing the R below 1.3 m (M is the gap between the flow path control shutter 8 and the opening 12 at the lowest working position), the molten glass stagnated in the gap between the opening portion 12 and the flow path control shutter 8 can be made. It is preferred for the minimum.
於本發明中，作為形成圓形狀之曲面之曲率半徑R，較佳為1.0 h以下，若為0.7 h以下，則更佳。於以單一之曲率半徑R形成圓形狀之情形時，考慮到流道控制閘板8之厚度或流道控制閘板8之升降寬度等，R可於1.0 h以下之範圍內適當決定。並且，於以複數個曲率半徑R之曲面形成之情形時，亦較佳為使R為1.0 h以下之曲面連續而形成。藉由將圓形狀之曲率半徑R設定為1.0 h以下，可利用圓形狀之曲面使自開口部12送出之熔融玻璃順利地誘導至流道控制閘板8之下端部。若圓形狀之R大於1.0 h，則變得難以使熔融玻璃朝向流道控制閘板8之下端順利地流動。In the present invention, the radius of curvature R of the curved surface forming the circular shape is preferably 1.0 h or less, and more preferably 0.7 h or less. In the case of forming a circular shape with a single radius of curvature R, R can be appropriately determined within a range of 1.0 h or less in consideration of the thickness of the flow path control shutter 8 or the lifting width of the flow path control shutter 8. Further, in the case of forming a plurality of curved surfaces having a curvature radius R, it is preferable to form a curved surface having R of 1.0 h or less continuously. By setting the radius of curvature R of the circular shape to 1.0 h or less, the molten glass sent from the opening portion 12 can be smoothly induced to the lower end portion of the flow path control shutter 8 by the curved surface of the circular shape. If the R of the circular shape is larger than 1.0 h, it becomes difficult to smoothly flow the molten glass toward the lower end of the flow path control shutter 8.
另一方面，於以單一之R形成圓形之情形時，因R越變小，流道控制閘板8之厚度越減少，故確保流道控制閘板所需之厚度變得困難。由於若R進一步變小，則變得無法使區域32形成為圓形狀，熔融玻璃之滯留區域增加，故R較佳為0.1 h以上，更佳為0.2 h以上。On the other hand, in the case where a single R is formed into a circular shape, the smaller the R is, the smaller the thickness of the flow path control shutter 8 is, so that it is difficult to secure the thickness required for the flow path control shutter. When R is further reduced, the region 32 cannot be formed into a circular shape, and the retention region of the molten glass is increased. Therefore, R is preferably 0.1 h or more, and more preferably 0.2 h or more.
圖5表示作為本發明之其他實施形態之流道控制閘板。流道控制閘板8A之開口部12側(圖5之左側)之面30A於下部具有形成為圓狀之區域32A，該區域32A之上下方向尺寸d為0.4 h以上。另一方面，與流道控制閘板8A之開口部12相反之側(圖5之右側)之面可不具有本發明之圓形狀。藉由如此形成流道控制閘板8A，可防止流道控制閘板8A之厚度增大到所需以上。Fig. 5 shows a flow path control shutter as another embodiment of the present invention. The surface 30A on the side of the opening portion 12 (the left side in FIG. 5) of the flow path control shutter 8A has a circularly formed region 32A at the lower portion, and the dimension d in the upper and lower directions of the region 32A is 0.4 h or more. On the other hand, the side opposite to the opening portion 12 of the flow path control shutter 8A (the right side in Fig. 5) may not have the circular shape of the present invention. By forming the flow path control shutter 8A in this manner, it is possible to prevent the thickness of the flow path control shutter 8A from being increased more than necessary.
圖6表示作為本發明之其他實施形態之流道控制閘板。於流道控制閘板8B之下部形成有平坦部18，流道控制閘板8B之開口部12側之面30B於下部具有形成為圓狀之區域32B，該區域32B之上下方向尺寸d為0.4 h以上。藉由於流道控制閘板8B之下部形成平坦部18，可使區域32B形成為如例如1.0 h之大小之曲率半徑R之圓形狀。Fig. 6 shows a flow path control shutter as another embodiment of the present invention. A flat portion 18 is formed in a lower portion of the flow path control shutter 8B, and a surface 30B on the opening portion 12 side of the flow path control shutter 8B has a circularly formed region 32B at a lower portion thereof, and the upper dimension d is 0.4 in the lower direction of the region 32B. h or more. By forming the flat portion 18 at the lower portion of the flow path control shutter 8B, the region 32B can be formed into a circular shape having a radius of curvature R of, for example, 1.0 h.
於本發明中，上述流道控制閘板較佳為如圖3所示將以二氧化矽玻璃陶瓷(熔融二氧化矽)等耐熱構件製作之主要部以耐熱性及耐蝕性優異之鉑或鉑合金17包覆。尤其是於熔融玻璃為熔融溫度較高之硼矽玻璃之情形時，保護流道控制閘板避開高溫之熔融玻璃，進而藉由向該鉑或鉑合金17通電而加熱，可使流道控制閘板保持於固定溫度，且可使送至熔融玻璃供給部之熔融玻璃保持於特定之溫度。該流道控制閘板之通電加熱可利用公知之方法適當地進行。In the present invention, the flow path control shutter is preferably a platinum or platinum which is excellent in heat resistance and corrosion resistance in a main portion made of a heat-resistant member such as cerium oxide glass ceramic (molten cerium oxide) as shown in FIG. Alloy 17 is coated. In particular, when the molten glass is a boron bismuth glass having a high melting temperature, the flow path control shutter is protected from the high temperature molten glass, and further heated by energizing the platinum or platinum alloy 17 to control the flow path. The shutter is maintained at a fixed temperature, and the molten glass sent to the molten glass supply portion can be maintained at a specific temperature. The energization heating of the flow path control shutter can be suitably performed by a known method.
於本發明中，上述供給管1之開口部12較佳為配置於較玻璃製作區域6之熔融玻璃位準(熔融玻璃之液面)11更低之位置(下側之位置)，且供給管1於其下游側具有扇形狀部3。該扇形狀部3，如圖2所示，熔融玻璃之流路自窄幅之上游端朝向前端(下游端)之開口部12，以特定之角度θ2向左右方向擴展，並且其截面形狀朝向開口部12逐漸扁平化，且如圖1所示朝向開口部12而向上方傾斜。因藉由使該扇形狀部3如此向上傾斜，而使扇形狀部3之上游端之高度相對於熔融玻璃供給部5下降，藉此可降低供給管1之上游側之高度，故可將玻璃製作區域6中之熔融玻璃自較熔融玻璃位準11相對較低之位置以供給管1取出。In the present invention, the opening portion 12 of the supply pipe 1 is preferably disposed at a position lower than the molten glass level (liquid surface of the molten glass) 11 of the glass forming region 6 (the position on the lower side), and the supply pipe 1 has a fan-shaped portion 3 on its downstream side. As shown in FIG. 2, the fan-shaped portion 3 extends from the upstream end of the narrow width toward the opening portion 12 of the front end (downstream end) in the left-right direction at a specific angle θ2, and has a cross-sectional shape facing the opening. The portion 12 is gradually flattened and inclined upward toward the opening portion 12 as shown in FIG. 1 . By tilting the fan-shaped portion 3 upward in this manner, the height of the upstream end of the fan-shaped portion 3 is lowered relative to the molten glass supply portion 5, whereby the height of the upstream side of the supply tube 1 can be lowered, so that the glass can be removed. The molten glass in the production zone 6 is taken out from the supply pipe 1 at a position relatively lower than the molten glass level 11.
於此種熔融玻璃供給裝置中，為將熔融玻璃供給部5與玻璃製作區域6以供給管1連通，而使熔融玻璃供給部5中之熔融玻璃保持於如圖1所示與玻璃製作區域6之熔融玻璃位準11相同之高度。一般而言，靠近玻璃製作區域6之熔融玻璃位準11的表層之熔融玻璃與其下層之熔融玻璃相比，含有更多之氣泡等，且一部分玻璃成分蒸發，因此成分亦不穩定。因此，若以先前之方式自靠近表層之位置取出熔融玻璃，則總會產生氣泡等易進入之問題。In the molten glass supply device, the molten glass supply portion 5 and the glass forming region 6 are communicated with the supply tube 1, and the molten glass in the molten glass supply portion 5 is held in the glass forming region 6 as shown in FIG. The molten glass level is the same height of 11. In general, the molten glass of the surface layer of the molten glass level 11 near the glass forming region 6 contains more bubbles or the like than the molten glass of the lower layer, and a part of the glass component evaporates, so that the composition is also unstable. Therefore, if the molten glass is taken out from the position close to the surface layer in the previous manner, there is always a problem that air bubbles or the like easily enter.
本發明中，可藉由使扇形狀部3向上傾斜，使供給管1之上游側降低，而使熔融玻璃之取出位置較先前降低。藉此，如圖1所示，可自距熔融玻璃位準11僅低a之位置取出熔融玻璃。於該情形時，a之長度主要由熔融玻璃製作區域6中之熔融玻璃之深度(熔融玻璃位準11之高度)來決定，但作為a之大小，通常較佳為250~900 mm左右。若將利用供給管1之熔融玻璃之取出位置設於該範圍，則可避開熔融玻璃位準11附近之熔融玻璃而取出氣泡等較少之良好之熔融玻璃。進而，因使供給管1之上游側降低，故可於扇形狀部3上形成所期望之向上之傾斜。一般因供給至浮法玻璃金屬液槽之熔融玻璃之黏度較高為103.5 ~104 dPa‧s左右，故於以供給管1移送中之熔融玻璃中產生之氣泡(氣體)浮起時成為阻力，但因藉由於上述扇形狀部3上可形成向上之傾斜，作用於氣泡之浮力與熔融玻璃之傾斜方向之流動作用累加，故可高效率地將氣泡誘導至扇形狀部3之頂端側而使其浮起至熔融玻璃之表層並放出。In the present invention, the upstream side of the supply pipe 1 can be lowered by tilting the fan-shaped portion 3 upward, and the position at which the molten glass is taken out can be lowered as compared with the prior art. Thereby, as shown in FIG. 1, the molten glass can be taken out from the position which is only low a from the molten glass level 11. In this case, the length of a is mainly determined by the depth of the molten glass in the molten glass production region 6 (the height of the molten glass level 11), but it is usually preferably about 250 to 900 mm as the size of a. When the extraction position of the molten glass by the supply pipe 1 is set in this range, it is possible to remove the molten glass in the vicinity of the molten glass level 11 and take out a small amount of good molten glass such as bubbles. Further, since the upstream side of the supply pipe 1 is lowered, a desired upward inclination can be formed on the fan-shaped portion 3. Generally, since the viscosity of the molten glass supplied to the float glass metal bath is as high as about 10 3.5 to 10 4 dPa·s, the bubble (gas) generated in the molten glass transferred by the supply pipe 1 is floated. The resistance is caused by the fact that the buoyancy of the bubble and the flow direction of the molten glass are accumulated in the upward direction of the fan-shaped portion 3, so that the bubble can be efficiently induced to the tip end side of the fan-shaped portion 3. It is floated to the surface of the molten glass and discharged.
本發明中之供給管1係藉由上述扇形狀部3與設置於該扇形狀部3之上游側之導入管部形成。本例之供給管1係將扇形狀部3連接於配設於水平方向上之圓筒管2而形成。即，將扇形狀部3連接於上游端連接於熔融玻璃製作區域6之圓筒管2之下游端，將熔融玻璃製作區域6之熔融玻璃以圓筒管2取出並導入至扇形狀部3，自該扇形狀部3(供給管1)之開口部12送出至熔融玻璃供給部5。因此，作為與圓筒管2之連接部之扇形狀部3的上游端之截面形狀對應於圓筒管2為圓形，但自此向前之截面形狀伴隨著扇形狀部3之扁平化而高度h逐漸降低，而變化為橢圓狀，開口部12形成基本形狀為於水平方向上長邊較長之長方形狀或長軸於水平方向上延伸之橫向之橢圓形狀。尤其是截面形狀為長方形狀之開口部，藉由使橫寬(長邊之長度)與熔融玻璃供給部5之寬度(圖1中與紙面垂直之方向之寬度)大致一致，可使熔融玻璃成為寬度與熔融玻璃供給部5之寬度大致相同且厚度於水平方向上大致固定之熔融玻璃流而送出至熔融玻璃供給部5，於此方面較佳。The supply pipe 1 in the present invention is formed by the fan-shaped portion 3 and an introduction pipe portion provided on the upstream side of the fan-shaped portion 3. The supply pipe 1 of this example is formed by connecting the fan-shaped portion 3 to the cylindrical tube 2 disposed in the horizontal direction. In other words, the fan-shaped portion 3 is connected to the downstream end of the cylindrical tube 2 whose upstream end is connected to the molten glass production region 6, and the molten glass of the molten glass production region 6 is taken out by the cylindrical tube 2 and introduced into the fan-shaped portion 3, The opening portion 12 of the fan-shaped portion 3 (the supply tube 1) is sent to the molten glass supply portion 5. Therefore, the cross-sectional shape of the upstream end of the fan-shaped portion 3 as the connection portion with the cylindrical tube 2 corresponds to the circular shape of the cylindrical tube 2, but the cross-sectional shape from the front is accompanied by the flattening of the fan-shaped portion 3. The height h gradually decreases and changes to an elliptical shape, and the opening portion 12 forms an elliptical shape in which the basic shape is a rectangular shape in which the long side is long in the horizontal direction or a lateral direction in which the long axis extends in the horizontal direction. In particular, the opening portion having a rectangular cross-sectional shape allows the molten glass to become substantially the same as the width of the molten glass supply portion 5 (the width in the direction perpendicular to the plane of the paper in FIG. 1). The molten glass flow having a width substantially the same as the width of the molten glass supply unit 5 and having a thickness substantially constant in the horizontal direction is sent to the molten glass supply unit 5, which is preferable.
若如此藉由扇形狀部3與如本例之圓筒管2之導入管部形成上述供給管1，則可獲得如下優勢。即，藉由改變導入管部之長度，可使供給管1之長度容易與熔融玻璃製作區域6及熔融玻璃供給部5之間隔一致。又，藉由將導入管部配置於大致水平方向上，可自熔融玻璃製作區域6順利地取出熔融玻璃，進而視需要可於該導入管部附設例如攪拌裝置。再者，於本例中係使用圓筒管2作為上述導入管部，並將該圓筒管配置於水平方向上，但作為導入管部，亦可為例如截面形狀為橢圓形狀或矩形狀之管狀體。又，導入管部並非必須配置於水平方向上，亦可於熔融玻璃之流動方向上稍微向上傾斜。再者，於截面形狀為橢圓形狀或矩形狀之導入管部之情形時，亦使連接於該導入管部之扇形狀部3之上游端之截面形狀與導入管部一致而成為橢圓形狀或矩形狀。If the supply tube 1 is formed by the fan-shaped portion 3 and the introduction tube portion of the cylindrical tube 2 as in the present embodiment, the following advantages can be obtained. That is, by changing the length of the introduction pipe portion, the length of the supply pipe 1 can be easily matched with the interval between the molten glass production region 6 and the molten glass supply portion 5. Moreover, by arranging the introduction tube portion in a substantially horizontal direction, the molten glass can be smoothly taken out from the molten glass production region 6, and a stirring device can be attached to the introduction tube portion as needed. In the present embodiment, the cylindrical tube 2 is used as the introduction tube portion, and the cylindrical tube is disposed in the horizontal direction. However, as the introduction tube portion, for example, the cross-sectional shape may be elliptical or rectangular. Tubular body. Further, the introduction tube portion does not have to be disposed in the horizontal direction, and may be slightly inclined upward in the flow direction of the molten glass. In the case where the cross-sectional shape is an elliptical or rectangular introduction tube portion, the cross-sectional shape of the upstream end of the fan-shaped portion 3 connected to the introduction tube portion is made to match the introduction tube portion to form an elliptical shape or a rectangular shape. shape.
於上述扇形狀部3中，開口部12之截面積較佳為與作為圓筒管2之連接部的上游端之截面積大致相同。具體而言，扇形狀部3之上游端之截面積(M1 )與下游端(開口部12)之截面積(M2 )之比(M1 /M2 )較佳為0.7~1.3。若(M1 /M2 )為0.8~1.2，則更佳；若為0.9~1.1，則進而較佳；若為0.95~1.05，則特佳。藉由如此設定扇形狀部3之上游端與下游端之截面積，可不使自圓筒管2送來之熔融玻璃停滯而始終穩定地自開口部12送出至熔融玻璃供給部5。並且，與扇形狀部3之熔融玻璃之移送方向正交之方向上的截面積，較佳為即便截面形狀如上所述例如自圓形狀逐漸變化為長方形狀或橢圓形狀，亦實質上未改變而與M1 、M2 相同。In the fan-shaped portion 3, the cross-sectional area of the opening portion 12 is preferably substantially the same as the cross-sectional area of the upstream end of the connecting portion of the cylindrical tube 2. Specifically, the sectional area of the upstream end 3 of the fan-shaped portion (M 1) and the downstream end (opening portion 12) of the cross-sectional area (M 2) a ratio (M 1 / M 2) is preferably 0.7 to 1.3. If (M 1 /M 2 ) is 0.8 to 1.2, it is more preferable; if it is 0.9 to 1.1, it is further preferable; if it is 0.95 to 1.05, it is particularly preferable. By setting the cross-sectional area of the upstream end and the downstream end of the fan-shaped portion 3 in this manner, the molten glass sent from the cylindrical tube 2 can be stably sent out from the opening portion 12 to the molten glass supply portion 5 without being stagnant. Further, the cross-sectional area in the direction orthogonal to the direction in which the molten glass of the fan-shaped portion 3 is orthogonally changed is preferably substantially unchanged even if the cross-sectional shape is gradually changed from a circular shape to a rectangular shape or an elliptical shape as described above. Same as M 1 and M 2 .
又，於靠近供給管1之扇形狀部3的開口部12之下游端部分，較佳為設置水平狀之平坦部4。因扇形狀部3具有向上傾斜角度，故於扇形狀部3之下游端部分未設置平坦部4之情形時，扇形狀部3中之熔融玻璃自開口部12以大致該傾斜角度送出至熔融玻璃供給部5。因此，於該情形時，因熔融玻璃直接形成向上之熔融玻璃流而自開口部12送出至熔融玻璃供給部5後，與對向於開口部12而設置之上述流道控制閘板8擋接，於該流道控制閘板面上彈回而向上方改變方向，故有於熔融玻璃供給部5中之熔融玻璃中產生混亂之虞。然而，若於扇形狀部3(供給管1)設置有平坦部4，則可於該平坦部4將熔融玻璃之流動方向改變為水平方向，並且可使熔融玻璃整流而送出至熔融玻璃供給部5，因此可不產生混亂。於該情形時，為於扇形狀部3之出口中確實地進行該整流，平坦部4較佳為具有固定之長度c，且其截面形狀及截面積於熔融玻璃之移送方向上相同。上述c雖未根據扇形狀部3之大小或傾斜角度等而限定其變化，但較佳為約50~300 mm左右，進而較佳為約50~200 mm左右。Further, it is preferable to provide a horizontal flat portion 4 at a downstream end portion of the opening portion 12 close to the fan-shaped portion 3 of the supply pipe 1. Since the fan-shaped portion 3 has an upward inclination angle, when the flat portion 4 is not provided at the downstream end portion of the fan-shaped portion 3, the molten glass in the fan-shaped portion 3 is sent from the opening portion 12 to the molten glass at substantially the inclination angle. Supply unit 5. Therefore, in this case, since the molten glass is directly formed into the upward molten glass flow, it is sent out from the opening 12 to the molten glass supply unit 5, and is then blocked from the flow path control shutter 8 provided to the opening 12. The spring is returned to the flow control gate surface and the direction is changed upward, so that there is confusion in the molten glass in the molten glass supply portion 5. However, when the flat portion 4 is provided in the fan-shaped portion 3 (the supply tube 1), the flow direction of the molten glass can be changed to the horizontal direction in the flat portion 4, and the molten glass can be rectified and sent to the molten glass supply portion. 5, so there is no confusion. In this case, in order to reliably perform the rectification in the outlet of the fan-shaped portion 3, the flat portion 4 preferably has a fixed length c, and its cross-sectional shape and cross-sectional area are the same in the direction in which the molten glass is transferred. The above c is not limited by the size or inclination angle of the fan-shaped portion 3, but is preferably about 50 to 300 mm, and more preferably about 50 to 200 mm.
於本發明之熔融玻璃供給部5中，供給管1(扇形狀部3)之開口部12較佳為相對於熔融玻璃位準11為以下關係。自扇形狀部3之開口部12之上表面至熔融玻璃位準11之高度e較佳為5~450 mm，又其上限較佳為約500 mm。由於若e小於5 mm，則表面上異質化之生坯會混入至熔融玻璃之主流中，若e超過約500 mm，則會變得難以維持該部分之熔融玻璃之溫度，故不佳。又，自開口部12之下表面(唇磚13之上表面)至熔融玻璃位準11之高度f較佳為100~600 mm，更佳為350~550 mm。f確保最小限100 mm於利用流道控制閘板之熔融玻璃之流量控制之方面較佳；若f超過600 mm，則會產生難以利用流道控制閘板之熔融玻璃之流量控制變得困難之虞。In the molten glass supply unit 5 of the present invention, the opening portion 12 of the supply tube 1 (the fan-shaped portion 3) preferably has the following relationship with respect to the molten glass level 11. The height e from the upper surface of the opening portion 12 of the fan-shaped portion 3 to the molten glass level 11 is preferably 5 to 450 mm, and the upper limit thereof is preferably about 500 mm. If e is less than 5 mm, the green body which is heterogeneous on the surface is mixed into the mainstream of the molten glass, and if e exceeds about 500 mm, it becomes difficult to maintain the temperature of the molten glass in the portion, which is not preferable. Further, the height f from the lower surface of the opening portion 12 (the upper surface of the lip brick 13) to the position of the molten glass 11 is preferably from 100 to 600 mm, more preferably from 350 to 550 mm. f. It is preferable to ensure a minimum of 100 mm in the flow control of the molten glass using the flow path control shutter; if f exceeds 600 mm, it becomes difficult to control the flow of the molten glass which is difficult to utilize the flow path control shutter. Hey.
其次，對扇形狀部3之向上傾斜角度及寬度方向之擴展角度進行說明。於本發明中，藉由扇形狀部3之頂端14之傾斜角度θ1來規定扇形狀部3之向上傾斜角度。此處，如圖2(A)所示，扇形狀部3之頂端14於扇形狀部3之平面視圖中，係熔融玻璃之移送方向之中心線L所位於之扇形狀部3之熔融玻璃流路之頂點部分；於如本例所示於扇形狀部3之下游端部分設置有平坦部4之情形時，係除該平坦部4以外之區域中的熔融玻璃流路之頂點部分。再者，作為藉由扇形狀部3之頂端14之傾斜角度θ1規定扇形狀部3之向上傾斜角度之理由，可舉出：因扇形狀部3之高度h於熔融玻璃之移送方向上遞減，故扇形狀部3之傾斜角度於上表面與下表面上不同，而必須選定某個基準。Next, the upward inclination angle of the fan-shaped portion 3 and the expansion angle in the width direction will be described. In the present invention, the upward inclination angle of the sector-shaped portion 3 is defined by the inclination angle θ1 of the distal end 14 of the sector-shaped portion 3. Here, as shown in FIG. 2(A), the top end 14 of the fan-shaped portion 3 is in a plan view of the fan-shaped portion 3, and is a molten glass flow in which the center line L of the direction in which the molten glass is transferred is located in the fan-shaped portion 3. In the case where the flat portion 4 is provided at the downstream end portion of the fan-shaped portion 3 as shown in this example, the apex portion of the molten glass flow path in the region other than the flat portion 4 is formed. In addition, the reason why the upward inclination angle of the sector shape portion 3 is defined by the inclination angle θ1 of the distal end 14 of the fan-shaped portion 3 is that the height h of the fan-shaped portion 3 is decreased in the direction in which the molten glass is transferred. Therefore, the inclination angle of the fan-shaped portion 3 is different between the upper surface and the lower surface, and a certain reference must be selected.
於本發明中，扇形狀部3之頂端14之傾斜角度θ1相對於水平方向較佳為2~30度，更佳為2~20度，進而較佳為2~7度。若θ1小於2度，則無法使扇形狀部3之上游端(與圓筒管2之連接部)之位置相對於熔融玻璃供給部5及熔融玻璃位準11充分地降低，因此有無法避免由於氣泡等較多且玻璃成分之蒸發而成分亦不穩定之表層部之熔融玻璃而取出良好之熔融玻璃之虞。又，若θ1超過30度，則不僅利用供給管1之熔融玻璃之取出位置變得過低，變得無法將熔融玻璃自熔融玻璃製作區域之合適位置取出，而且因供給管1急遽地傾斜而變得難以順利地移送熔融玻璃。In the present invention, the inclination angle θ1 of the tip end 14 of the fan-shaped portion 3 is preferably 2 to 30 degrees, more preferably 2 to 20 degrees, and still more preferably 2 to 7 degrees with respect to the horizontal direction. When θ1 is less than 2 degrees, the position of the upstream end of the fan-shaped portion 3 (the connection portion with the cylindrical tube 2) cannot be sufficiently lowered with respect to the molten glass supply portion 5 and the molten glass level 11, and therefore it is unavoidable The molten glass of the surface layer part which has many bubbles, etc., and the glass component is evaporating and the component is unstable, and the favorable molten glass is taken out. In addition, when θ1 exceeds 30 degrees, not only the extraction position of the molten glass by the supply pipe 1 is too low, but also the molten glass cannot be taken out from a suitable position in the molten glass production region, and the supply pipe 1 is tilted eagerly. It becomes difficult to transfer molten glass smoothly.
另一方面，扇形狀部3之左右方向之擴展角度θ2較佳為10~45度。若θ2小於10度，尤其是於如本例所示扇形狀部3之上游端為圓形之情形時，因該上游端之橫寬對應於圓筒管2之直徑相對較小，故變得無法充分獲得扇形狀部3(供給管1)之開口部12之擴展，而變得難以使開口部12之橫寬適合於熔融玻璃供給部5之橫寬。又，若θ2大於45度，則因自圓筒管2送來之熔融玻璃於扇形狀部3之上游端於橫向方向上急遽地擴展，故於方向變化較大之兩端之熔融玻璃流中產生延遲，變得無法均勻地移送熔融玻璃。就此種方面而言，θ2更佳為15~20度。On the other hand, the expansion angle θ2 of the fan-shaped portion 3 in the left-right direction is preferably 10 to 45 degrees. If θ2 is less than 10 degrees, especially when the upstream end of the fan-shaped portion 3 is circular as shown in this example, since the horizontal width of the upstream end corresponds to the diameter of the cylindrical tube 2 being relatively small, it becomes The expansion of the opening portion 12 of the fan-shaped portion 3 (the supply tube 1) is not sufficiently obtained, and it is difficult to make the lateral width of the opening portion 12 suitable for the lateral width of the molten glass supply portion 5. In addition, when θ2 is larger than 45 degrees, the molten glass sent from the cylindrical tube 2 is rapidly expanded in the lateral direction at the upstream end of the sector-shaped portion 3, so that the molten glass flows at both ends where the direction changes greatly. A delay occurs and it becomes impossible to uniformly transfer the molten glass. In this respect, θ2 is more preferably 15 to 20 degrees.
於本發明中，作為供給管1之材質，較佳為耐熱性與對熔融玻璃之耐蝕性較大之鉑或鉑合金(例如鉑-銠合金)、或者以鉑或鉑合金包覆之材料。鉑或鉑合金，作為此種用途，具有優異之實績，尤其是如LCD用玻璃基板，對於成形溫度較高之熔融玻璃較為適宜。作為以鉑或鉑合金包覆之材料，可例示以鉑或鉑合金包覆磚等之耐熱構件之內表面者。In the present invention, as the material of the supply pipe 1, a material having a heat resistance and a platinum or platinum alloy (for example, a platinum-rhodium alloy) having a large corrosion resistance to molten glass or a platinum or platinum alloy is preferable. Platinum or a platinum alloy has excellent performance as such a use, and is particularly suitable for a molten glass having a high forming temperature, such as a glass substrate for LCD. The material coated with platinum or a platinum alloy may be exemplified by coating the inner surface of a heat-resistant member such as a brick with platinum or a platinum alloy.
又，雖無圖式，但以該等材料形成之供給管1之導入管部及/或扇形狀部較佳為藉由通電而均勻地加熱。通電加熱可藉由向鉑或鉑合金直接通電，或在以鉑或鉑合金包覆之材料為導電性材料之時向該材料通電而進行。自熔融玻璃製作區域6取出至供給管1之高溫之熔融玻璃，因在移送至熔融玻璃供給部5之過程中完全隔離於周圍空氣，故可防止由與空氣接觸所致之冷卻，並且藉由上述供給管1之通電加熱，而保持於實質上均勻之溫度，以適合成形之溫度移送至熔融玻璃供給部5。Further, although there is no drawing, it is preferable that the introduction tube portion and/or the fan-shaped portion of the supply tube 1 formed of these materials are uniformly heated by energization. The electric heating can be performed by directly applying electricity to platinum or a platinum alloy, or by energizing the material when the material coated with platinum or a platinum alloy is a conductive material. The molten glass taken out from the molten glass production region 6 to the high temperature of the supply pipe 1 is completely isolated from the surrounding air during the transfer to the molten glass supply portion 5, so that the cooling by contact with the air can be prevented, and by The supply tube 1 is heated by electric conduction, and is maintained at a substantially uniform temperature, and is transferred to the molten glass supply unit 5 at a temperature suitable for molding.
已詳細地且參照特定之實施態樣說明了本發明，但業者瞭解，於不脫離本發明之精神與範圍之情況下可添加各種修正或變更。The present invention has been described in detail with reference to the specific embodiments thereof, and it is understood that various modifications and changes can be added without departing from the spirit and scope of the invention.
本申請案係基於2010年4月28日提出申請之日本專利申請案2010-104349者，其內容作為參照而併入本文中。The present application is based on Japanese Patent Application No. 2010-104349, filed on Apr.
本發明可作為浮法玻璃製造裝置之熔融玻璃供給裝置而加以利用，尤其適於將無鹼硼矽玻璃之類的熔融溫度較高、含有易揮發玻璃成分之熔融玻璃供給至浮法玻璃金屬液槽。The present invention can be utilized as a molten glass supply device for a float glass manufacturing apparatus, and is particularly suitable for supplying a molten glass having a high melting temperature such as an alkali-free borosilicate glass and containing a volatile glass component to a float glass molten metal. groove.
1、21‧‧‧供給管1, 21‧‧‧ supply pipe
2‧‧‧圓筒管2‧‧‧Cylinder tube
3‧‧‧扇形狀部3‧‧‧Face shape
4、18‧‧‧平坦部4, 18‧‧‧ Flat Department
5、22‧‧‧熔融玻璃供給部5, 22‧‧‧ molten glass supply department
6‧‧‧熔融玻璃製作區域6‧‧‧Metal glass production area
7‧‧‧浮法玻璃金屬液槽7‧‧‧Float glass metal tank
8、8A、8B、20‧‧‧流道控制閘板8, 8A, 8B, 20‧‧‧ flow channel control gate
9‧‧‧熔融錫9‧‧‧Fused tin
10‧‧‧浮法玻璃10‧‧‧Float glass
11‧‧‧熔融玻璃位準11‧‧‧Metal glass level
12、24‧‧‧開口部12, 24‧‧‧ openings
13‧‧‧唇磚13‧‧‧Lip brick
14‧‧‧頂端14‧‧‧Top
15‧‧‧金屬件15‧‧‧Metal parts
16‧‧‧懸吊棒16‧‧‧ hanging stick
17‧‧‧鉑或鉑合金17‧‧‧Platinum or platinum alloy
19．．．周壁19. . . Zhou wall
23．．．熔融玻璃層twenty three. . . Molten glass layer
25．．．曲面形狀25. . . Surface shape
27．．．平面27. . . flat
28．．．供給管之上部28. . . Upper part of the supply pipe
29．．．斜線部29. . . Slash
30、30A、30B．．．流道控制閘板之開口部側之面30, 30A, 30B. . . The side of the opening side of the flow control gate
32、32A、32B．．．區域32, 32A, 32B. . . region
a、e、f、h．．．高度a, e, f, h. . . height
b．．．寬度b. . . width
c．．．長度c. . . length
d．．．上下方向尺寸d. . . Up and down direction size
L．．．熔融玻璃之移送方向之中心線L. . . Center line of the direction in which the molten glass is transferred
M．．．間隙M. . . gap
M'．．．最大間隙M'. . . Maximum clearance
R．．．曲率半徑R. . . Radius of curvature
X、Y．．．點X, Y. . . point
θ1、θ2．．．角度Θ1, θ2. . . angle
圖1為本發明之一實施形態之熔融玻璃供給裝置之剖面說明圖。Fig. 1 is a cross-sectional explanatory view showing a molten glass supply apparatus according to an embodiment of the present invention.
圖2(A)為圖1之供給管之平面圖，圖2(B)為自圖2(A)之右側觀察之側視圖。2(A) is a plan view of the supply pipe of FIG. 1, and FIG. 2(B) is a side view as seen from the right side of FIG. 2(A).
圖3為本發明之一實施形態之流道控制閘板之立體圖。Fig. 3 is a perspective view of a flow path control shutter according to an embodiment of the present invention.
圖4為圖1之熔融玻璃供給裝置之部分放大圖。Figure 4 is a partial enlarged view of the molten glass supply device of Figure 1.
圖5為本發明之其他實施形態之流道控制閘板之部分剖面圖。Fig. 5 is a partial cross-sectional view showing a flow path control shutter according to another embodiment of the present invention.
圖6為本發明之其他實施形態之流道控制閘板之部分剖面圖。Figure 6 is a partial cross-sectional view showing a flow path control shutter of another embodiment of the present invention.
圖7為將流道控制閘板置於最上作業位置時之剖面圖。Figure 7 is a cross-sectional view showing the runner control shutter in the uppermost working position.
圖8為先前之熔融玻璃供給裝置之剖面圖。Figure 8 is a cross-sectional view of a prior molten glass supply device.
3．．．扇形狀部3. . . Fan shape
4．．．平坦部4. . . Flat part
5．．．熔融玻璃供給部5. . . Molten glass supply
8．．．流道控制閘板8. . . Runner control gate
11．．．熔融玻璃位準11. . . Molten glass level
12．．．開口部12. . . Opening
19．．．周壁19. . . Zhou wall
30．．．流道控制閘板之開口部側之面30. . . The side of the opening side of the flow control gate
32．．．區域32. . . region
d．．．上下方向尺寸d. . . Up and down direction size
h．．．高度h. . . height
M．．．間隙M. . . gap
R．．．曲率半徑R. . . Radius of curvature
X、Y．．．點X, Y. . . point
Claims (9)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010104349 | 2010-04-28 |
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| Publication Number | Publication Date |
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| TW201141804A TW201141804A (en) | 2011-12-01 |
| TWI474987B true TWI474987B (en) | 2015-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| TW100114943A TWI474987B (en) | 2010-04-28 | 2011-04-28 | A molten glass supply device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5751252B2 (en) |
| KR (1) | KR101492703B1 (en) |
| CN (1) | CN102869624B (en) |
| TW (1) | TWI474987B (en) |
| WO (1) | WO2011136148A1 (en) |
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|---|---|---|---|---|
| KR101583372B1 (en) * | 2013-09-03 | 2016-01-07 | 주식회사 엘지화학 | Disparate glass removing apparatus and glass manufacturing apparatus including the same |
| JP6402923B2 (en) * | 2014-12-17 | 2018-10-10 | 日本電気硝子株式会社 | Method for producing twill and glass article |
| JP6620411B2 (en) * | 2015-03-30 | 2019-12-18 | 日本電気硝子株式会社 | Glass article manufacturing apparatus and glass article manufacturing method |
| JP2017014059A (en) * | 2015-06-30 | 2017-01-19 | 旭硝子株式会社 | Molten glass supply apparatus, production apparatus of glass sheet, and production methods of glass sheet |
| KR102523899B1 (en) * | 2018-10-17 | 2023-04-20 | 주식회사 엘지화학 | Apparatus for manufacturing glass |
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| US3973940A (en) * | 1974-05-30 | 1976-08-10 | Ppg Industries, Inc. | Delivery of molten glass to a glass forming process |
| US20060016222A1 (en) * | 2004-07-13 | 2006-01-26 | Thomas Pfeiffer | Device for electrically grounding a float glass production apparatus |
| JP2008539151A (en) * | 2005-04-26 | 2008-11-13 | ボットガー，ディーター | Apparatus for transferring molten glass onto a float bath |
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| BE782139A (en) * | 1971-04-16 | 1972-07-31 | Vetreria Di Vernante Spa | IMPROVEMENTS AT THE ENTRY SIDE OF A TUNNEL FOR THE CONTINUOUS MANUFACTURING OF GLASS SLABS FOLLOWING THE FLOATING METHOD |
| US3843345A (en) * | 1973-03-06 | 1974-10-22 | Ppg Industries Inc | Method and apparatus for delivery of molten glass to a float forming process |
| US4099950A (en) | 1977-08-04 | 1978-07-11 | Ppg Industries, Inc. | Glass ribbon apparatus with tweel employing glassy silica glass contact refractory |
| GB2086878B (en) * | 1980-10-27 | 1984-05-10 | Central Glass Co Ltd | Method of forming thin sheet glass by float process |
| GB2102790B (en) * | 1981-07-31 | 1985-01-03 | Central Glass Co Ltd | Method of producing thin sheet glass of high quality by float process |
| JP3224243B2 (en) * | 1990-09-26 | 2001-10-29 | 日本板硝子株式会社 | Float bath ribbon width control method and apparatus |
| JPH1149525A (en) * | 1997-07-30 | 1999-02-23 | Central Glass Co Ltd | Tool for adjusting amount of glass green body |
| DE10209743A1 (en) | 2002-03-06 | 2003-12-11 | Schott Glas | Device for adjusting the level of a glass melt in a feeder channel of a float system for producing a floated glass ribbon |
| DE10209740A1 (en) * | 2002-03-06 | 2003-09-25 | Schott Glas | Device for adjusting the level of a glass melt in a feeder channel of a float system for producing a floated glass ribbon |
| JP3861795B2 (en) | 2002-10-28 | 2006-12-20 | 旭硝子株式会社 | Float plate glass manufacturing apparatus and manufacturing method |
| CN1289417C (en) * | 2003-09-28 | 2006-12-13 | 洛阳玻璃股份有限公司 | Method of sealing in small spatial obstructs at entrance end of tin pot in product line float glass, and seal structure |
| TWI454436B (en) * | 2009-11-16 | 2014-10-01 | Asahi Glass Co Ltd | A molten glass supply device |
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2011
- 2011-04-22 JP JP2012512822A patent/JP5751252B2/en not_active Expired - Fee Related
- 2011-04-22 WO PCT/JP2011/059987 patent/WO2011136148A1/en active Application Filing
- 2011-04-22 KR KR1020127028019A patent/KR101492703B1/en active IP Right Grant
- 2011-04-22 CN CN201180021582.6A patent/CN102869624B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973940A (en) * | 1974-05-30 | 1976-08-10 | Ppg Industries, Inc. | Delivery of molten glass to a glass forming process |
| US20060016222A1 (en) * | 2004-07-13 | 2006-01-26 | Thomas Pfeiffer | Device for electrically grounding a float glass production apparatus |
| JP2008539151A (en) * | 2005-04-26 | 2008-11-13 | ボットガー，ディーター | Apparatus for transferring molten glass onto a float bath |
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| Publication number | Publication date |
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| CN102869624B (en) | 2015-04-01 |
| JP5751252B2 (en) | 2015-07-22 |
| TW201141804A (en) | 2011-12-01 |
| KR20130080782A (en) | 2013-07-15 |
| WO2011136148A1 (en) | 2011-11-03 |
| KR101492703B1 (en) | 2015-02-11 |
| JPWO2011136148A1 (en) | 2013-07-18 |
| CN102869624A (en) | 2013-01-09 |
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