CN111977956A - Float glass manufacturing device and float glass manufacturing method - Google Patents
Float glass manufacturing device and float glass manufacturing method Download PDFInfo
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- CN111977956A CN111977956A CN202010439806.6A CN202010439806A CN111977956A CN 111977956 A CN111977956 A CN 111977956A CN 202010439806 A CN202010439806 A CN 202010439806A CN 111977956 A CN111977956 A CN 111977956A
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- height adjusting
- float
- glass manufacturing
- glass
- float glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/168—Means for cleaning the rollers
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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
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
- C03B25/04—Annealing glass products in a continuous way
- C03B25/06—Annealing glass products in a continuous way with horizontal displacement of the glass products
- C03B25/08—Annealing glass products in a continuous way with horizontal displacement of the glass products of glass sheets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The present invention relates to a float glass manufacturing apparatus and a float glass manufacturing method. The invention relates to a float glass manufacturing device (1) which is provided with a float furnace (10), a scum box (20) and a slow cooling furnace (40), and is characterized in that the scum box (20) is provided with a removing component (23) contacted with a lifting roller (21) and a supporting mechanism (30) for supporting the removing component (23), and the supporting mechanism (30) is provided with a plurality of height adjusting parts (35) arranged along the axial direction of the lifting roller, a bracket (31) arranged on the height adjusting parts (35) and a fluid supply part (39) connected with the height adjusting parts (35).
Description
Technical Field
The present invention relates to a float glass manufacturing apparatus and a float glass manufacturing method.
Background
In the production of a glass sheet by the float process, molten glass is supplied from a glass melting furnace to a molten tin bath called a float furnace, a glass ribbon is formed on the molten tin bath, and then the glass ribbon is conveyed by conveying rollers called lift rollers and conveyed to a slow cooling furnace. In general, a defect called dross (tin and tin oxide) adheres to the lower surface of the glass ribbon.
Glass sheets used for Flat Panel Display (FPD) applications such as Liquid Crystal Displays (LCD) have high quality requirements for scum defects.
Therefore, in patent document 1, a carbon removing member is brought into contact with a lower portion of the lift roller by an elastic restoring force of a plate spring as an elastic support body, and tin or tin oxide adhering to the lift roller is scraped off and removed.
The conventional elastic support body 25 shown in fig. 5 includes a holder 26 on which the removing member 23 is placed and a plurality of plate spring main bodies 27 supporting the holder 26.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 11-335127
Disclosure of Invention
Problems to be solved by the invention
However, since the elastic support is exposed to a high-temperature atmosphere, the elastic restoring force sometimes decreases when the elastic support is continuously used for a long period of time. As a result, the contact pressure between the removal member and the lift roller may vary, and the removal member may not sufficiently remove tin or tin oxide adhering to the lift roller. As a result, there are the following problems: the tin or tin oxide adhering to the lift roller is transferred to the lower surface of the glass ribbon, resulting in a scum defect.
The present invention has been made in view of the above problems, and an object thereof is to provide a float glass manufacturing apparatus and a float glass manufacturing method capable of sufficiently removing tin or tin oxide adhering to a lift roller.
Means for solving the problems
The present invention provides a float glass manufacturing device, comprising: a float furnace that forms a glass ribbon on a molten metal; a dross box adjacent to the float bath and having lift rollers to pull up the glass ribbon; and a slow cooling furnace adjacent to the dross box, wherein the dross box has a removing member in contact with the lift roller and a support mechanism supporting the removing member, and the support mechanism has a plurality of height adjusting portions provided in an axial direction of the lift roller, a bracket disposed on the height adjusting portions, and a fluid supply portion connected to the height adjusting portions.
Further, the present invention provides a float glass manufacturing method in which a glass ribbon is formed on a molten metal in a float furnace by continuously supplying the molten glass to the molten metal, the glass ribbon is drawn out from the float furnace by a lift roller provided in a float box, and the glass ribbon is slowly cooled while being conveyed in a slow cooling furnace, characterized in that a removing member is brought into contact with the lift roller in the float box by using a support mechanism having a plurality of height adjusting portions provided along an axial direction of the lift roller and a holder disposed on the height adjusting portions, and a fluid is supplied to the height adjusting portions.
Effects of the invention
According to the present invention, there are provided a float glass production apparatus and a float glass production method capable of sufficiently removing tin or tin oxide adhering to a lift roller.
Drawings
Fig. 1 is a view showing a float glass manufacturing apparatus according to an embodiment of the present invention.
Fig. 2 is a partial sectional view taken along line II-II of the support mechanism and removal member shown in fig. 1.
Fig. 3(a) and 3(B) are partially enlarged views of the support mechanism shown in fig. 2, fig. 3(a) is a view showing a state in which fluid is supplied to the piston, and fig. 3(B) is a view showing a state in which fluid is not supplied to the piston.
Fig. 4(a) and 4(B) are internal sectional views of the support mechanism shown in fig. 3(a) and 3 (B).
Fig. 5 is a sectional view showing an elastic support body and a removing member of the related art.
Reference numerals
1: float glass manufacturing device
10: floating-throwing kiln
11: bath tub
20: scum box
21: lifting roller
23: removal member
28: storage component
30: supporting mechanism
31: support frame
32: cylinder
33: projection part
34: piston
35: height adjusting part
37: stop piece (ストッパー)
38: supporting member
39: fluid supply unit
40: slow cooling furnace
41: annealing roller
G: glass ribbon
M: molten metal
Detailed Description
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the present specification, "to" indicating a numerical range means a range including the numerical values before and after it.
An XYZ coordinate system is appropriately shown in the drawings as a three-dimensional orthogonal coordinate system.
In the present specification, the X-axis direction is a conveyance direction of the glass ribbon G in a plan view, the Y-axis direction is a direction (sheet width direction) orthogonal to the conveyance direction of the glass ribbon G in a plan view, and the Z-axis direction is a vertical direction. The upstream side and the downstream side are the upstream side and the downstream side with respect to the X-axis direction, and the + X side is the downstream side and the-X side is the upstream side. The longitudinal section is an XZ plane, and the cross section is a YZ plane.
[ float glass manufacturing apparatus ]
Fig. 1 is a view showing a float glass manufacturing apparatus according to an embodiment of the present invention. A float glass production apparatus according to an embodiment of the present invention will be described with reference to fig. 1.
The float glass manufacturing apparatus 1 includes, from the upstream side, a float furnace 10, a dross box 20 adjacent to the float furnace 10, and a slow cooling furnace 40 adjacent to the dross box 20.
The float furnace 10 has a bath 11 that contains molten metal M, and forms continuously supplied molten glass into a glass ribbon G on the molten metal M. The molten glass is obtained by melting raw glass materials in a glass melting furnace disposed on the upstream side (on the X side) of the float furnace 10 and further performing a fining process.
The upper space of the float kiln 10 is filled with a reducing gas containing nitrogen and hydrogen, and is set to a pressure higher than atmospheric pressure. This is to prevent inflow of air from the outside and to prevent oxidation of the molten metal M.
The dross box 20 has: a lift roller 21 for pulling up the glass ribbon G; a removing member 23 in contact with the lift roller 21; a support mechanism 30 for supporting the removing member 23; and a receiving member 28 that accommodates the support mechanism 30.
The lift-up roller 21 is rotationally driven by a driving device (not shown) such as a motor, and the glass ribbon G is conveyed obliquely upward by its driving force. The removing member 23 removes a scum defect attached to the lifting roller 21. The receiving member 28 is disposed on the bottom wall of the dross box 20, and has a U-shaped longitudinal cross section (XZ plane). This can prevent the removal member 23 and the support mechanism 30 from being displaced in the conveyance direction (X-axis direction) of the glass ribbon G.
The number of lift rollers 21 shown in fig. 1 is 3, but may be 2 or less, or may be 4 or more.
In order to adjust the temperature of the glass ribbon G, the dross box 20 may have heaters on the ceiling and the bottom wall.
The inner space of the dross box 20 is a non-oxidizing atmosphere (a reducing gas, an inert gas, or a mixed gas thereof). As the reducing gas, hydrogen gas or acetylene gas is preferable, and as the inert gas, nitrogen gas or argon gas is preferable. The oxygen concentration in the internal space of the dross box 20 is preferably 100ppm or less, and more preferably 20ppm or less.
The annealing furnace 40 gradually cools the glass ribbon G to a temperature equal to or lower than the strain point temperature of the glass while conveying the glass ribbon G by the annealing rolls (レヤーロール)41 to obtain plate-like glass. The annealing furnace 40 has heaters (not shown) on the ceiling and the bottom wall in order to adjust the temperature of the glass ribbon G. The annealing roller 41 is rotationally driven by a driving device (not shown) such as a motor, and the glass ribbon G is conveyed in the horizontal direction by its driving force. The plate-shaped glass after the slow cooling is cut into a desired size by a cutting device, thereby obtaining a glass plate.
Since the slow cooling furnace 40 is open to the outside at the outlet on the downstream side (+ X side), the internal space is an oxidizing atmosphere. The interior of the slow cooling furnace 40 communicates with the interior of the floating kiln 10 via the interior of the dross box 20.
The diameter of the lift roller 21 or the annealing roller 41 (hereinafter, collectively referred to as "conveyance roller") is preferably 100mm to 500mm, more preferably 200mm to 500 mm. When the diameter is 100mm or more, the circumferential speed of the transport roller can be increased without applying a load to the driving device. In addition, when the diameter is 500mm or less, the distance between the conveying rollers and the adjacent conveying rollers can be shortened, and the deformation of the glass ribbon G between the conveying rollers can be suppressed. In particular, since the glass ribbon G having a thickness of 2mm or less is easily deformed between the conveying rollers, it is preferable to use a conveying roller having a diameter of 500mm or less.
The main body length of the transport roller in the axial direction (Y-axis direction) is preferably 5000mm or more, and more preferably 5500mm or more. When the main body length is 5000mm or more, the sheet width of the glass ribbon G can be increased, and float glass can be efficiently produced.
Various ceramics such as oxides, carbides, and nitrides, or stainless steel is used as a surface material for the transport roller. Specific examples of the ceramics include zirconia (ZrO)2) Zirconia ceramics as main component, and alumina (Al)2O3) Alumina-based ceramics as main component and Silica (SiO)2) A silicon oxide-based ceramic as a main component.
Fig. 2 is a partial sectional view taken along line II-II of the support mechanism and removal member shown in fig. 1. The supporting mechanism and the removing member shown in fig. 1 will be described with reference to fig. 2.
The support mechanism 30 and the 3 removing members 23 shown in fig. 2 are arranged in the axial direction (Y-axis direction) of the lift roller. The axial direction of the lift roller of the present embodiment is the same direction as the sheet width direction of the glass ribbon.
The support mechanism 30 includes a plurality of height adjusting portions 35 provided in the axial direction (Y-axis direction) of the lift roller 21, a holder 31 disposed on the height adjusting portions 35, and a fluid supply portion 39 connected to the height adjusting portions 35. The support mechanism 30 preferably has a support member 38 that fixes the height adjusting portion 35 between the height adjusting portion 35 and the fluid supply portion 39.
The removing member 23 is preferably supported by two or more height adjusting portions 35 via the holder 31. The holder 31 is thus not easily bent, and therefore the removal member 23 can be brought into uniform contact with the lift roller, and scum defects can be removed uniformly.
It is preferable that a plurality of brackets 31 are provided in the axial direction (Y-axis direction) of the lift roller. In the present embodiment, each removing member 23 is provided with a holder 31. Thereby, the contact pressure between the lift roller 21 and the removing member 23 can be adjusted for each removing member 23, and therefore, the removing member 23 can be brought into uniform contact with the lift roller and the scum defect can be uniformly removed. Note that, two or more removing members 23 may be placed on the holder 31.
In the present embodiment, the holder 31 is a plate-like member, and has a rectangular shape in XY plan view. The axial direction (Y-axis direction) length of the holder 31 is longer than the total length of the removing members 23 arranged in parallel on the holder 31. It is preferable that the length of the holder 31 in the X-axis direction is longer than the length of the removing member 23, and the length of the holder 31 in the X-axis direction is shorter than the length of the receiving member 28 in the U-shape in cross section.
The height adjusting portion 35 preferably has a piston 34 to which fluid is supplied from the fluid supply portion 39 and a cylinder 32 that accommodates the piston 34. The height adjusting portion 35 of fig. 2 is in a state of supplying fluid to the piston. From the viewpoint of heat resistance and durability, SUS is preferable as the material of the cylinder 32 and the piston 34.
In the present embodiment, the fluid supply unit 39 has a plurality of pipes inside. The conduit is provided in such a manner as to supply fluid to the inner space of the support member 38. Thereby, the fluid supply portion 39 supplies the fluid to the height adjusting portion 35 via the internal space of the support member 38. In the present embodiment, a partition is provided in the internal space of the support member 38 so that the amount of fluid supplied to the height adjusting portion 35 can be adjusted for each holder 31. The position of the spacer is preferably the position of the end of the holder 31 in the axial direction (Y-axis direction) of the lift roller.
The fluid supply unit 39 may be configured as follows: the fluid supply portion 39 has a partition inside, and a pipe is connected to each internal space formed by the partition. Even in this manner, the amount of fluid supplied to the height adjusting portion 35 can be adjusted for each holder 31.
The fluid supply unit 39 may be a system for adjusting the amount of fluid supplied to each height adjustment unit 35. Specifically, the following method is used: a partition plate is provided in the inner space of the support member 38 corresponding to each height adjusting portion 35, and a duct is connected to the introduction port of the height adjusting portion 35.
Outside the dross box 20, a supply valve, a flow meter, a pressure gauge, and a pressure relief ejector are connected to the piping. Since there is a possibility that the supplied fluid leaks into the internal space of the dross box 20, it is preferable to use an inert gas such as nitrogen or argon in order to keep the oxygen concentration in the internal space low.
A refrigerant pipe (e.g., a water pipe) is preferably provided between the fluid supply unit 39 and the housing member 28 shown in fig. 1 along the axial direction (Y-axis direction) of the lift roller. This can reduce the temperature of the fluid supplied to the height adjusting portion 35, and therefore the height adjusting portion 35 can be used for a long period of time without being thermally deformed.
In the present embodiment, the removal member 23 has a rectangular parallelepiped shape. The removal member 23 may be a quadrangular prism having a trapezoidal or inverted trapezoidal cross section (YZ plane). The number of the removing members 23 shown in fig. 2 is 3, but may be 4 or more. The number of the removing members 23 is determined according to the length of the main body of the lift roller in the axial direction (Y-axis direction).
In the present embodiment, the removing member 23 is a molded body of carbon (graphite). The removal member 23 may be a molded body of boron nitride, alkali metal sulfate, alkaline earth metal sulfate, alkali metal carbonate, alkaline earth metal carbonate, silica-based fine particles, or alumina fine particles.
The maximum particle diameter of the carbon powder used for the molded body is preferably 0.1mm to 3mm, and more preferably 0.5mm to 2.5mm, with respect to the removing member 23. When the maximum particle diameter is 0.1mm to 3mm, the strength of the removing member 23 as a molded body can be secured.
The shore hardness of the removal member 23 is preferably 20HS to 90HS, and more preferably 30HS to 80 HS. When the shore hardness is 20HS to 90HS, the abrasion resistance to the removing member 23 of the lift roller can be ensured.
Fig. 3(a) and 3(B) are partially enlarged views of the support mechanism shown in fig. 2, fig. 3(a) is a view showing a state in which fluid is supplied to the piston, and fig. 3(B) is a view showing a state in which fluid is not supplied to the piston. Fig. 4(a) and 4(B) are internal sectional views of the support mechanism shown in fig. 3(a) and 3 (B). The support mechanism shown in fig. 2 will be described with reference to fig. 3(a) and 3(B) and fig. 4(a) and 4 (B).
The cylinder 32 preferably has a projection 33 projecting radially outward. A protrusion 33 is provided at a lower side of the cylinder 32 to secure a stroke of the cylinder 32. In the present embodiment, the protruding portion 33 is provided at the lower end of the cylinder 32.
The support member 38 preferably has a stopper 37 for stopping the projection 33. The stopper 37 is fixed to the support member 38 by using a bolt and a nut or welding. In the present embodiment, the cross section (YZ plane) of the stopper 37 is an inverted L-shape, and the blocking portion is located at the upper end of the stopper 37. Therefore, the stroke of the cylinder 32 can be ensured. Note that, even in a state where fluid is not supplied to the piston 34, the stopper 37 is lower in height than the cylinder 32.
By having the protruding portion 33 and the stopper 37 as the support mechanism, even if the pressure of the fluid supplied to the cylinder 32 is excessively high, the cylinder 32 can be prevented from being disengaged from the piston 34.
Fig. 3(a) and 4(a) show a state in which fluid is supplied to the piston 34. The removal member is in contact with the lift roller. By supplying fluid from the piston 34, a space is formed between the inside of the cylinder 32 and the upper end of the piston 34. An O-ring (not shown) is provided above the piston 34 to ensure the sealing of the space. The piston 34 has a plurality of flow paths with small inner diameters. Thereby, the pressure of the fluid supplied from the fluid supply portion 39 is increased, so that the height adjustment of the cylinder 32 becomes easy.
Fig. 3(B) and 4(B) show a state where no fluid is supplied to the piston 34. The removing member does not contact the lift roller. The upper end inside the cylinder 32 is in contact with the upper end of the piston 34.
[ method for producing float glass ]
Next, a method for manufacturing float glass according to an embodiment of the present invention will be described.
In a float glass manufacturing method, molten glass is continuously supplied onto molten metal in a float furnace, a glass ribbon is formed on the molten metal, the glass ribbon is pulled out from the float furnace by lift rolls provided in a float bath, and the glass ribbon is slowly cooled to a temperature equal to or lower than the strain point temperature of the glass while being conveyed by annealing rolls provided in a slow cooling furnace.
In the scum box, a removing member is brought into contact with the lifting roll by using a supporting mechanism to remove scum defects attached to the lifting roll.
The support mechanism has a plurality of height adjusting portions provided in the axial direction of the lift roller and a bracket arranged on the height adjusting portions, and supplies fluid to the height adjusting portions.
Preferably, a plurality of brackets are provided in the axial direction of the lift roller. The amount of fluid supplied to the height adjusting section is preferably adjusted for each holder. Thus, the contact pressure between the lift roller and the removal member can be adjusted for each holder, and therefore, the removal member can be brought into uniform contact with the lift roller, and scum defects can be removed uniformly.
The plate-shaped glass after the slow cooling is cut into a desired size by a cutting device, thereby obtaining a glass plate.
In the case of manufacturing a glass substrate for a liquid crystal display, the float glass manufacturing method further includes a polishing step of polishing the glass plate in order to improve the flatness of the glass plate.
The float glass produced in the present embodiment may be a soda lime glass for window glass and vehicle applications, but is preferably a glass containing an alkali metal component such as a glass for chemical strengthening used for protective glass applications, or an alkali-free glass containing substantially no alkali metal component. Here, the term "substantially not containing an alkali metal component" means that the total content of alkali metal oxides is 0.1 mass% or less. The alkali-free glass is mainly used for glass substrates for liquid crystal displays. Glass sheets for cover glass applications and glass substrates for liquid crystal displays have strict requirements for quality of scum defects.
For example, the glass for chemical strengthening contains SiO in mol% based on the oxide2：62％～68％、Al2O3：6％～12％、MgO：7％～13％、Na2O：9％～17％、K2O：0～7％，Na2O and K2The total content of O minus Al2O3The difference in content is less than 10%, and ZrO is contained2In the case of (2), ZrO2The content of (B) is 0.8% or less.
Another glass for chemical strengthening contains SiO in mol% based on the oxide2：65％～85％、Al2O3：3％～15％、Na2O：5％～15％、K2O: 0 to less than 2%, MgO: 0-15%: ZrO (ZrO)2: 0 to 1% and SiO2And Al2O3SiO in total content2+Al2O3Is 88% or less.
Another glass for chemical strengthening contains 50 to 75% of SiO in mol% based on the oxide29 to 20 percent of Al2O310 to 20 percent of Na2O, 0-6% of K2O, 0 to 15% MgO, 0 to 10% CaO, SrO and BaO in terms of the total amount (CaO + SrO + BaO), and the total amount (ZrO)2+TiO2) ZrO in an amount of 0 to 5%2And TiO20 to 10% of B2O30 to 20% of Li2O。
For example, the alkali-free glass contains SiO in mass% based on the oxide2：50％～73％、Al2O3：10.5％～24％、B2O3：0～12％、MgO：0～10％、CaO：0～14.5％、SrO：0～24％、BaO：0～13.5％、MgO+CaO+SrO+BaO：8％～29.5％、ZrO2：0～5％。
In the case of having both a high strain point and a high melting property, the alkali-free glass preferably contains SiO in terms of mass% based on oxides2：58％～66％、Al2O3：15％～22％、B2O3：5％～12％、MgO：0～8％、CaO：0～9％、SrO：3％～12.5％、BaO：0～2％、MgO+CaO+SrO+BaO：9％～18％。
When it is desired to obtain a particularly high strain point, the alkali-free glass preferably contains SiO in terms of mass% based on oxides2：54％～73％、Al2O3：10.5％～22.5％、B2O3：0～5.5％、MgO：0～10％、CaO：0～9％、SrO：0～16％、BaO：0～2.5％、MgO+CaO+SrO+BaO：8％～26％。
The float glass produced in the present embodiment has a thickness of 0.1mm to 2.0mm for protective glass applications, and 0.1mm to 0.7mm for glass substrates for liquid crystal displays.
In the case of the glass substrate for liquid crystal display, the substrate size is preferably 2100mm or more in the short side and 2400mm or more in the long side, more preferably 2800mm or more in the short side and 3000mm or more in the long side, and still more preferably 2900mm or more in the short side and 3200mm or more in the long side.
While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
The present application is based on japanese patent application 2019-096775, filed on 23/5/2019, the contents of which are incorporated herein by reference.
Industrial applicability
The use of the float glass produced may be architectural, automotive, flat panel display, cover glass, or other various uses.
Claims (8)
1. A float glass manufacturing apparatus comprising: a float furnace that forms a glass ribbon on a molten metal; a dross box adjacent to the float bath and having lift rollers to pull up the glass ribbon; a slow cooling furnace, which is adjacent to the scum box, and is characterized in that,
the dross box has a removing member which comes into contact with the lift roller and a support mechanism which supports the removing member, and
the support mechanism includes a plurality of height adjusting portions provided in an axial direction of the lift roller, a holder disposed on the height adjusting portions, and a fluid supply portion connected to the height adjusting portions.
2. The float glass manufacturing apparatus of claim 1, wherein the removal member is supported by two or more of the height adjusting parts.
3. The float glass manufacturing apparatus according to claim 1 or 2, wherein the support mechanism has a support member that fixes the height adjusting part between the height adjusting part and the fluid supply part.
4. The float glass manufacturing apparatus according to claim 1 or 2, wherein a plurality of the brackets are provided in an axial direction of the lift roller.
5. The float glass manufacturing apparatus of claim 3, wherein the height adjusting part has: a piston to which fluid is supplied from the fluid supply portion; and a cylinder accommodating the piston.
6. The float glass manufacturing apparatus of claim 5, wherein the cylinder has a protrusion protruding to a radially outer side, and the support member has a stopper for stopping the protrusion.
7. A float glass manufacturing method in which a molten glass is continuously supplied onto a molten metal in a float furnace, a glass ribbon is formed on the molten metal, the glass ribbon is drawn out from the float furnace by lift rolls provided in a float bath, and the glass ribbon is slowly cooled while being conveyed in a slow cooling furnace, characterized in that,
in the dross box, a removing member is brought into contact with the lift roller using a support mechanism, and
the support mechanism has a plurality of height adjusting portions provided in an axial direction of the lift roller and a bracket arranged on the height adjusting portions, and supplies fluid to the height adjusting portions.
8. The float glass manufacturing method of claim 7, wherein a plurality of the brackets are provided in an axial direction of the lift roller, and
the amount of fluid supplied to the height adjusting portion is adjusted for each of the holders.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019096775A JP2020189771A (en) | 2019-05-23 | 2019-05-23 | Apparatus and method for manufacturing float glass |
| JP2019-096775 | 2019-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111977956A true CN111977956A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010439806.6A Pending CN111977956A (en) | 2019-05-23 | 2020-05-22 | Float glass manufacturing device and float glass manufacturing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020189771A (en) |
| CN (1) | CN111977956A (en) |
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| CN104108860A (en) * | 2014-07-02 | 2014-10-22 | 中国南玻集团股份有限公司 | Tin scrubbing apparatus |
| CN203960038U (en) * | 2014-07-02 | 2014-11-26 | 中国南玻集团股份有限公司 | Wipe tin device |
| CN105399310A (en) * | 2015-12-04 | 2016-03-16 | 蚌埠凯盛工程技术有限公司 | Pneumatic spring type tin cleaning device |
| CN109422444A (en) * | 2017-09-01 | 2019-03-05 | Ａｇｃ株式会社 | Float glass manufacturing device and float glass making process |
| CN109455920A (en) * | 2018-12-24 | 2019-03-12 | 福耀集团(福建)机械制造有限公司 | A kind of wiping tin device of transition roller table |
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| JP2020189771A (en) | 2020-11-26 |
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