WO2015025568A1 - Float glass production device and float glass production method using same - Google Patents
Float glass production device and float glass production method using same Download PDFInfo
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- WO2015025568A1 WO2015025568A1 PCT/JP2014/063379 JP2014063379W WO2015025568A1 WO 2015025568 A1 WO2015025568 A1 WO 2015025568A1 JP 2014063379 W JP2014063379 W JP 2014063379W WO 2015025568 A1 WO2015025568 A1 WO 2015025568A1
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- wall
- float glass
- partition wall
- temperature space
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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
- C03B18/20—Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath
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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
- C03B18/16—Construction of the float tank; Use of material for the float tank; Coating or protection of the tank wall
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Definitions
- the present invention relates to a float glass manufacturing apparatus and a float glass manufacturing method using the same.
- the float glass manufacturing method includes a forming step of flowing a glass ribbon on a liquid surface of a molten metal (for example, molten tin) in a bathtub to form a plate (for example, refer to Patent Document 1).
- a molten metal for example, molten tin
- the molding space between the bathtub and the ceiling is filled with a reducing gas in order to suppress the oxidation of the molten metal.
- the forming space contains a small amount of gas evaporated from the molten metal. This gas contains the metal element evaporated from the molten metal in the form of a simple substance or a compound. Examples of the compound include metal oxides and metal sulfides.
- the gas evaporated from the molten metal is cooled to form foreign matters such as droplets and particles, and the foreign matters fall on the upper surface of the glass ribbon, resulting in many defects.
- the present invention has been made in view of the above problems, and has as its main object to provide a float glass manufacturing apparatus with a reduced number of defects.
- a bathtub containing molten metal An entrance wall located above the upstream portion of the bathtub; An outlet wall located above the downstream part of the bathtub; A ceiling disposed above the bathtub and extending from the entrance wall to the exit wall; Provided at intervals along the flow direction of the glass ribbon flowing over the liquid surface of the molten metal, pressing the width direction end of the glass ribbon that has passed between the liquid surface and the inlet wall, And a plurality of top rolls rotating by itself, A partition wall that partitions the molding space surrounded by the ceiling, the bathtub, the entrance wall and the exit wall into a high temperature space on the upstream side and a low temperature space on the downstream side; An exhaust passage for discharging the gas in the high temperature space to the outside of the molding space,
- the float glass manufacturing apparatus is provided in which the partition wall is disposed on the downstream side of the inlet wall, and is disposed on the upstream side of the most upstream top roll among the plurality of top rolls.
- a float glass manufacturing method with a reduced number of defects.
- FIG. 2 is a cross-sectional view taken along line II-II in FIG.
- FIG. 3 is a sectional view taken along line III-III in FIG.
- the same or corresponding components are denoted by the same or corresponding reference numerals, and description thereof is omitted.
- the “width direction” means a direction orthogonal to the flow direction of the glass ribbon in the forming step.
- FIG. 1 is a sectional view showing a forming apparatus of a float glass manufacturing apparatus according to an embodiment of the present invention.
- FIG. 2 is a sectional view taken along line II-II in FIG. In FIG. 2, the heater and the upper side wall are not shown in order to make the drawing easy to see.
- FIG. 3 is a sectional view taken along line III-III in FIG.
- the float glass manufacturing apparatus has a forming apparatus 10.
- the forming apparatus 10 causes the glass ribbon 14 to flow on the liquid surface of the molten metal 11 in the bathtub 20 to form a plate shape.
- the glass ribbon 14 is pulled up from the molten metal 11 in the downstream area of the bathtub 20, and is sent from the outlet formed between the bathtub 20 and the outlet wall 28 to the slow cooling furnace.
- a plate-like float glass is obtained by cutting the glass ribbon 14 that has been gradually cooled in the slow cooling furnace.
- the molding apparatus 10 includes a bathtub 20, a spout trip 22, a twill 23, restrictor tiles 24 and 25, an inlet wall 26, an outlet wall 28, a ceiling 30, upper side walls 32 and 33, An air passage 34, a heater 36, a top roll 40, a partition wall 42, an exhaust passage 44, and the like are included.
- the bathtub 20 accommodates the molten metal 11 as shown in FIGS.
- the molten metal 11 for example, molten tin or a molten tin alloy can be used as long as it can float the glass ribbon 14.
- the spout trip 22 continuously supplies the molten glass 12 on the liquid surface of the molten metal 11.
- the molten glass 12 passes between the spout trip 22 and the twill 23, is supplied onto the liquid surface of the molten metal 11, and becomes a glass ribbon 14.
- the twill 23 is movable up and down with respect to the spout trip 22 in order to make the flow rate of the molten glass 12 variable.
- the restrictor tiles 24 and 25 are in contact with the glass ribbon 14 as shown in FIG. 2 and regulate the width of the glass ribbon 14.
- the restrictor tiles 24 and 25 expand toward the downstream side. Therefore, between the restrictor tiles 24 and 25, the glass ribbon 14 is widened while flowing toward the downstream.
- the glass ribbon 14 flows at a distance from the side wall of the bathtub 20, and the width can be freely changed between the side walls of the bathtub 20.
- the entrance wall 26 is located above the upstream part of the bathtub 20 as shown in FIG.
- the inlet wall 26 is disposed on the downstream side of the spout trip 22 and is disposed above the restrictor tiles 24 and 25.
- the entire liquid surface of the molten metal 11 is covered with the glass ribbon 14 on the upstream side of the inlet wall 26.
- most of the liquid level of the molten metal 11 is covered with the glass ribbon 14 on the downstream side of the inlet wall 26, but a part of the liquid level of the molten metal 11 is not covered with the glass ribbon 14.
- the exit wall 28 is located above the downstream part of the bathtub 20 as shown in FIG.
- the ceiling 30 is provided above the bathtub 20 as shown in FIG. 1 and extends from the entrance wall 26 to the exit wall 28.
- the forming space 50 surrounded by the bathtub 20, the ceiling 30, the inlet wall 26 and the outlet wall 28 is filled with a reducing gas in order to suppress oxidation of the exposed portion of the liquid surface of the molten metal 11 that is not covered by the glass ribbon 14. May be.
- the pressure in the molding space 50 may be higher than the atmospheric pressure.
- the upper side walls 32 and 33 block the gap between the side wall of the bathtub 20 and the ceiling 30 as shown in FIG.
- the upper side walls 32, 33 extend from the inlet wall 26 to the outlet wall 28.
- a through hole through which the rotation shaft of the top roll 40 is inserted, an end portion of the exhaust passage 44, and the like are formed.
- the heater 36 is inserted into the air supply path 34 of the ceiling 30, and the heat generating portion of the heater 36 is disposed in the molding space 50.
- the heater 36 heats the molten metal 11 and the glass ribbon 14 from above.
- a plurality of heaters 36 are provided at intervals in the flow direction (X direction) and the width direction (Y direction) of the glass ribbon 14. The output of the heater 36 is controlled so that the temperature of the glass ribbon 14 becomes lower toward the downstream side.
- the top rolls 40 are used in pairs, pressing the end of the glass ribbon 14 in the width direction, and applying tension to the glass ribbon 14 in the width direction.
- a plurality of pairs of top rolls 40 are disposed at intervals along the flow direction of the glass ribbon 14.
- the top roll 40 has a rotating member in contact with the glass ribbon 14 at the tip. While the rotating member rotates and the plurality of pairs of top rolls 40 apply tension to the glass ribbon 14, the glass ribbon 14 gradually cools and becomes hard while flowing in the downstream direction.
- the top roll 40 may have a refrigerant flow path inside to suppress deterioration due to heat.
- a coolant such as water flowing through the coolant channel absorbs the heat of the top roll 40 and transports it to the outside, thereby cooling the top roll 40.
- the partition wall 42 partitions the molding space 50 into an upstream high temperature space 51 and a downstream low temperature space 52, and restricts the outflow of gas from the high temperature space 51 to the low temperature space 52.
- the partition wall 42 may extend from one upper side wall 32 to the other upper side wall 33, and may cross the molding space 50.
- the high temperature space 51 Since the high temperature space 51 is hotter than the low temperature space 52, it contains a large amount of gas evaporated from the molten metal 11 in the bathtub 20.
- This gas contains the metal element evaporated from the molten metal 11 in the form of at least one of a simple substance and a compound. Examples of the compound include metal oxides and metal sulfides. Hereinafter, this gas is referred to as a metal-containing gas.
- the partition wall 42 restricts the outflow of the metal-containing gas from the high temperature space 51 to the low temperature space 52.
- the number of foreign matters such as droplets and particles that can be formed by cooling the metal-containing gas in the low temperature space 52 can be reduced. As a result, it is possible to reduce the number of defects caused by the foreign matter falling on the surface of the glass ribbon 14.
- Gas is supplied to the high temperature space 51 and the low temperature space 52 from the outside of the molding apparatus 10 via the air supply passages 34 formed on the respective ceilings.
- This gas may be a reducing gas in order to limit oxidation of the exposed portion of the liquid surface of the molten metal 11.
- the reducing gas includes, for example, 1 to 15% by volume of hydrogen gas and 85 to 99% by volume of nitrogen gas.
- the reducing gas may be supplied to the high temperature space 51 and the low temperature space 52 through the air supply path 34 after being preheated in the preheating space 53 surrounded by the roof casing 31 and the ceiling 30.
- the gas in the preheating space 53 flows into the molding space 50 not only through the air supply passage 34 but also through brick joints that form the ceiling 30.
- Gas is supplied to the high temperature space 51 from the outside of the molding apparatus 10 through a spout space 27 formed between the twill 23 and the inlet wall 26 in addition to the air supply path 34 formed on the ceiling. .
- the gas may be supplied to the spout space 27 from at least one of the upper side and the side.
- This gas may be either an inert gas or a reducing gas.
- An exhaust path is not connected to the spout space 27, and most of the gas supplied to the spout space 27 passes below the inlet wall 26 and is supplied to the high temperature space 51.
- An exhaust path 44 is formed on the side wall of the high temperature space 51 (that is, the upper side walls 32 and 33).
- the exhaust path 44 exhausts the gas in the high temperature space 51 to the outside of the molding apparatus 10.
- the outside of the molding apparatus 10 may be read as the outside of the molding space 50.
- the exhaust path 44 may discharge gas using a pressure difference between the high temperature space 51 and the outside of the molding apparatus 10, or may discharge gas using a suction force of a pump or the like.
- the exhaust path 44 may be formed not only on the side wall of the high temperature space 51 but also on the side wall of the low temperature space 52.
- the float glass manufacturing method has a forming step in which the glass ribbon 14 is flowed on the liquid surface of the molten metal 11 in the bathtub 20 to form a plate shape.
- the forming step the width direction end of the glass ribbon 14 that has passed between the liquid surface of the molten metal 11 and the inlet wall 26 is pressed by the top roll 40, the top roll 40 rotates, and the glass ribbon 14 moves downstream. Fluidized.
- the partition wall 42 is disposed on the downstream side of the inlet wall 26.
- the high temperature space 51 on the upstream side of the partition wall 42 can capture a large amount of the metal-containing gas.
- the airflow tends to become unstable near the top roll 40.
- the causes of the unstable airflow include, for example, cold ambient air from the through hole through which the rotation shaft of the top roll 40 is inserted in the upper side wall 32, and the temperature difference between the top roll 40 cooled by the refrigerant and its surroundings. Etc. Therefore, the partition wall 42 is disposed on the most upstream side among the plurality of top rolls 40 arranged at intervals in the flow direction of the glass ribbon 14 (hereinafter referred to as “the most upstream top roll 40”). It arrange
- the partition wall 42 is disposed on the downstream side of the inlet wall 26, and is disposed on the upstream side of the most upstream top roll 40.
- the high temperature space 51 upstream from the partition wall 42 can capture a large amount of the metal-containing gas, and the outflow of the metal-containing gas captured in the high temperature space 51 to the low temperature space 52 can be suppressed.
- the partition wall 42 may be disposed in a range Z in which the viscosity of the glass ribbon 14 is 10 4.9 to 10 5.6 dPa ⁇ s in the flow direction of the glass ribbon 14. If the partition wall 42 is disposed in the range Z, the partition wall 42 is disposed at a position sufficiently away from the uppermost upstream roll 40 on the upstream side, so that the airflow in the vicinity of the partition wall 42 is easily stabilized. This is particularly effective in that the airflow can be stabilized when the thickness of the float glass is 2 mm or less, preferably 1 mm or less, and more preferably 0.7 mm or less. The thinner the float glass, the greater the number of top rolls 40 used to draw the glass ribbon 14 thinner.
- the partition wall 42 is disposed in the range Z, the partition wall 42 is disposed at a position sufficiently upstream from the uppermost top roll 40, so that the airflow in the vicinity of the partition wall 42 Is easy to stabilize. Further, if the partition wall 42 is disposed in the range Z, the partition wall 42 is disposed at a position sufficiently separated from the inlet wall 26 on the downstream side, so that the upstream high-temperature space 51 contains a large amount of metal-containing gas. Can capture.
- the partition wall 42 is preferably disposed in the flow direction of the glass ribbon 14 so that the viscosity of the glass ribbon 14 is in the range of 10 4.9 to 10 5.5 dPa ⁇ s, and the viscosity of the glass ribbon 14 is 10 5. More preferably, it is disposed in the range of 0.0 to 10 5.4 dPa ⁇ s.
- the ratio of the exposed portion of the liquid surface of the molten metal 11 that is not covered by the glass ribbon 14 may be 10 to 40%. If the ratio of the exposed portion is 10% or more, the high temperature space 51 formed between the partition wall 42 and the inlet wall 26 can sufficiently capture the metal-containing gas. Moreover, if the ratio of an exposed part is 40% or less, deterioration of the heater 36 by metal containing gas can be suppressed.
- the ratio of the exposed portion in the liquid surface of the molten metal 11 between the partition wall 42 and the inlet wall 26 is preferably 10 to 35%, more preferably 10 to 20%.
- the partition wall 42 has a horizontal distance (X-direction distance) L1 between the upstream end of the inlet wall 26 and the upstream end of the partition wall 42 such that the upstream end of the inlet wall 26 and the outlet wall 28. May be disposed at a position that is 5 to 20% of the distance L2 in the X direction between the upstream end and the upstream end. If the distance L1 is 5% or more of the distance L2, the high temperature space 51 formed between the partition wall 42 and the inlet wall 26 can sufficiently capture the metal-containing gas. In addition, if the distance L1 is 20% or less of the distance L2, the partition wall 42 can be disposed at a position sufficiently away from the most upstream top roll 40 on the upstream side.
- the distance L1 is preferably 5 to 15% of the distance L2, and more preferably 5 to 10% of the distance L2.
- the partition wall 42 protrudes downward from the ceiling 30.
- the height H1 (see FIG. 3) of the lower end of the partition wall 42 is, for example, 10 to 40% of the height H2 (see FIG. 1) of the lower surface of the ceiling 30. . If the height H1 of the lower end of the partition wall 42 is 10% or more of the height H2 of the lower surface of the ceiling 30, it is possible to monitor the glass ribbon downstream from the partition wall 42 from the uppermost stream of the molding space 50. is there.
- the metal-containing gas can be retained in the high temperature space 51, and the high temperature space 51 is moved to the low temperature space 52.
- the outflow of the metal-containing gas can be reduced.
- the height H1 of the lower end of the partition wall 42 is preferably 10 to 35% of the height H2 of the lower surface of the ceiling 30, and more preferably 10 to 20% of the height H2 of the lower surface of the ceiling 30.
- the partition wall 42 may be movable in the vertical direction with respect to the ceiling 30 in order to make the height H1 variable.
- a connecting rod 46 is connected to the partition wall 42, and a nut 47 is rotatably held on the roof casing 31.
- the connecting rod 46 screwed with the nut 47 moves in the vertical direction, and as a result, the partition wall 42 moves in the vertical direction.
- the gas discharge amount Qout to the outside of the molding apparatus 10 is preferably 100% or more of the gas supply amount Qin from the outside of the molding apparatus 10, and more preferably 170% or more of the supply amount Qin. More preferably, it is 230% or more of the supply amount.
- Qin means the normal flow rate (Nm 3 / hr) of the gas supplied to the high temperature space 51 from at least one of the upper side, the side, and the upstream (from the upper side and the upstream side in this embodiment).
- the amount of gas supplied from the downstream is not included in Qin.
- the reason why the amount of gas supplied from the upstream (that is, the spout space 27) is included in Qin is that most of the gas supplied to the spout space 27 from the outside of the molding apparatus 10 is supplied to the high temperature space 51 as it is. .
- an air supply path may be provided in the upper side walls 32 and 33.
- Qout means the normal flow rate (Nm 3 / hr) of the gas discharged from the high temperature space 51 to at least one of the upper side and the side (side in this embodiment).
- the amount of gas discharged downstream and upstream is not included in Qout. Note that the amount of gas discharged to the upstream (that is, the spout space 27) is very small. This is because the exhaust path is not connected to the spout space 27. Note that when the gas is discharged upward from the high temperature space 51, an exhaust path may be provided in the ceiling 30.
- discharge amount is equal to the supply amount, there is almost no gas inflow and outflow between the high temperature space 51 and the low temperature space 52, and there is almost no outflow of metal-containing gas from the high temperature space 51 to the low temperature space 52.
- the discharge amount is larger than the supply amount, the gas is supplied from the low temperature space 52 to the high temperature space 51. Therefore, an air flow from the low temperature space 52 toward the high temperature space 51 is formed, and this air flow can suppress the outflow of the metal-containing gas from the high temperature space 51 to the low temperature space 52.
- the manufactured float glass may be, for example, an alkali-free glass.
- the alkali-free glass is a glass that does not substantially contain an alkali metal oxide (Na 2 O, K 2 O, Li 2 O, etc.).
- the alkali-free glass may have a total content of alkali metal oxides of 0.1% by mass or less.
- the alkali-free glass is, for example, expressed by mass% based on oxide, SiO 2 : 50 to 73%, Al 2 O 3 : 10.5 to 24%, B 2 O 3 : 0 to 12%, MgO: 0 to 8%, CaO: 0 to 14.5%, SrO: 0 to 24%, BaO: 0 to 13.5%, ZrO 2 : 0 to 5%, MgO + CaO + SrO + BaO: 8 to 29.5%.
- the alkali-free glass has both a high strain point and high solubility, it is preferably expressed in terms of mass% on the basis of oxide, SiO 2 : 58 to 66%, Al 2 O 3 : 15 to 22%, B 2 O 3 : 5 to 12%, MgO: 0 to 8%, CaO: 0 to 9%, SrO: 3 to 12.5%, BaO: 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%.
- the alkali-free glass is preferably expressed in terms of mass% based on oxide, SiO 2 : 54 to 73%, Al 2 O 3 : 10.5 to 22.5%, B 2 O 3 : 0 to 5.5%, MgO: 0 to 8%, CaO: 0 to 9%, SrO: 0 to 16%, BaO: 0 to 2.5%, MgO + CaO + SrO + BaO: 8 to 26%.
- the molding temperature of these alkali-free glasses is 100 ° C. or more higher than the molding temperature of general soda lime glass. Therefore, the amount of the metal-containing gas that evaporates from the molten metal 11 is large, and it is significant that the partition wall 42 suppresses the outflow of the metal-containing gas from the high temperature space 51 to the low temperature space 52.
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Abstract
Description
溶融金属を収容する浴槽と、
前記浴槽の上流部の上方に位置する入口壁と、
前記浴槽の下流部の上方に位置する出口壁と、
前記浴槽の上方に配設され前記入口壁から前記出口壁まで延びる天井と、
前記溶融金属の液面の上を流動するガラスリボンの流動方向に沿って間隔を置いて設けられ、前記液面と前記入口壁との間を通過した前記ガラスリボンの幅方向端部を押さえ、かつ自身が回転する複数のトップロールと、
前記天井、前記浴槽、前記入口壁及び前記出口壁で囲まれた成形空間を上流側の高温空間と下流側の低温空間とに仕切る仕切壁と、
前記高温空間内のガスを前記成形空間の外部に排出する排気路とを備え、
前記仕切壁は、前記入口壁よりも下流側に配設され、且つ、前記複数のトップロールのうち最も上流側のトップロールよりも上流に配設されたフロートガラス製造装置が提供される。 In order to solve the above problems, according to one aspect of the present invention,
A bathtub containing molten metal;
An entrance wall located above the upstream portion of the bathtub;
An outlet wall located above the downstream part of the bathtub;
A ceiling disposed above the bathtub and extending from the entrance wall to the exit wall;
Provided at intervals along the flow direction of the glass ribbon flowing over the liquid surface of the molten metal, pressing the width direction end of the glass ribbon that has passed between the liquid surface and the inlet wall, And a plurality of top rolls rotating by itself,
A partition wall that partitions the molding space surrounded by the ceiling, the bathtub, the entrance wall and the exit wall into a high temperature space on the upstream side and a low temperature space on the downstream side;
An exhaust passage for discharging the gas in the high temperature space to the outside of the molding space,
The float glass manufacturing apparatus is provided in which the partition wall is disposed on the downstream side of the inlet wall, and is disposed on the upstream side of the most upstream top roll among the plurality of top rolls.
11 溶融金属
12 溶融ガラス
14 ガラスリボン
20 浴槽
22 スパウトリップ
26 入口壁
30 天井
40 トップロール
42 仕切壁
50 成形空間
51 高温空間
52 低温空間 DESCRIPTION OF
Claims (9)
- 溶融金属を収容する浴槽と、
前記浴槽の上流部の上方に位置する入口壁と、
前記浴槽の下流部の上方に位置する出口壁と、
前記浴槽の上方に配設され前記入口壁から前記出口壁まで延びる天井と、
前記溶融金属の液面の上を流動するガラスリボンの流動方向に沿って間隔を置いて設けられ、前記液面と前記入口壁との間を通過した前記ガラスリボンの幅方向端部を押さえ、かつ自身が回転する複数のトップロールと、
前記天井、前記浴槽、前記入口壁及び前記出口壁で囲まれた成形空間を上流側の高温空間と下流側の低温空間とに仕切る仕切壁と、
前記高温空間内のガスを前記成形空間の外部に排出する排気路とを備え、
前記仕切壁は、前記入口壁よりも下流側に配設され、且つ、前記複数のトップロールのうち最も上流側のトップロールよりも上流に配設されたフロートガラス製造装置。 A bathtub containing molten metal;
An entrance wall located above the upstream portion of the bathtub;
An outlet wall located above the downstream part of the bathtub;
A ceiling disposed above the bathtub and extending from the entrance wall to the exit wall;
Provided at intervals along the flow direction of the glass ribbon flowing over the liquid surface of the molten metal, pressing the width direction end of the glass ribbon that has passed between the liquid surface and the inlet wall, And a plurality of top rolls rotating by itself,
A partition wall that partitions the molding space surrounded by the ceiling, the bathtub, the entrance wall and the exit wall into a high temperature space on the upstream side and a low temperature space on the downstream side;
An exhaust passage for discharging the gas in the high temperature space to the outside of the molding space,
The said partition wall is a float glass manufacturing apparatus arrange | positioned in the downstream rather than the said entrance wall, and was arrange | positioned upstream from the most upstream top roll among these top rolls. - 前記仕切壁は、前記ガラスリボンの流動方向において、前記ガラスリボンの粘度が104.9~105.6dPa・sの範囲に配設される、請求項1に記載のフロートガラス製造装置。 The float glass manufacturing apparatus according to claim 1, wherein the partition wall is disposed in a range of a viscosity of 10 4.9 to 10 5.6 dPa · s in the flow direction of the glass ribbon.
- 前記仕切壁と前記入口壁との間において、前記溶融金属の液面のうち前記ガラスリボンによって覆われない露出部分の割合が10~40%である、請求項1または2に記載のフロートガラス製造装置。 The float glass production according to claim 1 or 2, wherein a ratio of an exposed portion which is not covered by the glass ribbon in the liquid surface of the molten metal is 10 to 40% between the partition wall and the inlet wall. apparatus.
- 前記仕切壁は、前記天井から下方に突出し、
前記溶融金属の液面の露出部分を基準として、前記仕切壁の下端の高さが前記天井の下面の高さの10~40%である、請求項1~3のいずれか一項に記載のフロートガラス製造装置。 The partition wall protrudes downward from the ceiling,
The height of the lower end of the partition wall is 10 to 40% of the height of the lower surface of the ceiling with reference to the exposed portion of the liquid level of the molten metal. Float glass manufacturing equipment. - 製造されるフロートガラスは無アルカリガラスである、請求項1~4のいずれか一項に記載のフロートガラス製造装置。 The float glass manufacturing apparatus according to any one of claims 1 to 4, wherein the float glass to be manufactured is alkali-free glass.
- 請求項1~5のいずれか一項に記載のフロートガラス製造装置を用い、
前記高温空間内のガスを、前記排気路を介して前記成形空間の外部に排出することを特徴とするフロートガラス製造方法。 Using the float glass manufacturing apparatus according to any one of claims 1 to 5,
A method for producing float glass, characterized in that the gas in the high temperature space is discharged to the outside of the forming space through the exhaust passage. - 請求項1に記載のフロートガラス製造装置を用い、
前記ガラスリボンの流動方向において、前記ガラスリボンの粘度が104.9~105.6dPa・sの範囲に、前記仕切壁を配設する、フロートガラス製造方法。 Using the float glass manufacturing apparatus according to claim 1,
A method for producing float glass, wherein the partition wall is disposed in a range of viscosity of 10 4.9 to 10 5.6 dPa · s in the flow direction of the glass ribbon. - 請求項1に記載のフロートガラス製造装置を用い、
前記溶融金属の液面のうち前記ガラスリボンによって覆われない露出部分の割合は、前記仕切壁と前記入口壁との間において、10~40%である、フロートガラス製造方法。 Using the float glass manufacturing apparatus according to claim 1,
The method for producing float glass, wherein a ratio of an exposed portion of the molten metal liquid surface not covered by the glass ribbon is 10 to 40% between the partition wall and the inlet wall. - 請求項1に記載のフロートガラス製造装置を用い、
製造されるフロートガラスが無アルカリガラスである、フロートガラス製造方法。 Using the float glass manufacturing apparatus according to claim 1,
The float glass manufacturing method whose float glass manufactured is an alkali free glass.
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CN201480039235.XA CN105377777B (en) | 2013-08-22 | 2014-05-20 | Float glass manufacturing device and the float glass making process using the device |
KR1020157033388A KR102153289B1 (en) | 2013-08-22 | 2014-05-20 | Float glass production device and float glass production method using same |
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KR20190092028A (en) * | 2018-01-30 | 2019-08-07 | 주식회사 엘지화학 | Float glass making device |
WO2023211746A1 (en) * | 2022-04-29 | 2023-11-02 | Corning Incorporated | Glass forming apparatus and method for forming a glass ribbon |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS59128222A (en) * | 1983-01-12 | 1984-07-24 | Nippon Sheet Glass Co Ltd | Float type plate glass manufacturing apparatus |
JP2011219348A (en) * | 2010-03-26 | 2011-11-04 | Nippon Electric Glass Co Ltd | Glass plate production apparatus and method for producing glass plate |
JP2012001398A (en) * | 2010-06-17 | 2012-01-05 | Asahi Glass Co Ltd | Apparatus and method for manufacturing glass plate |
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JPS503414A (en) | 1973-05-16 | 1975-01-14 | ||
CN200940114Y (en) * | 2006-08-03 | 2007-08-29 | 秦皇岛玻璃工业研究设计院 | Gas discharging device for float glass process tin cell |
CN202107623U (en) * | 2011-06-27 | 2012-01-11 | 台玻成都玻璃有限公司 | Exhauster |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS59128222A (en) * | 1983-01-12 | 1984-07-24 | Nippon Sheet Glass Co Ltd | Float type plate glass manufacturing apparatus |
JP2011219348A (en) * | 2010-03-26 | 2011-11-04 | Nippon Electric Glass Co Ltd | Glass plate production apparatus and method for producing glass plate |
JP2012001398A (en) * | 2010-06-17 | 2012-01-05 | Asahi Glass Co Ltd | Apparatus and method for manufacturing glass plate |
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GLASS KOGAKU HANDBOOK, 5 July 1999 (1999-07-05), pages 361 - 362 * |
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CN105377777B (en) | 2017-09-22 |
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