CN115677185A - Tin bath for improving Mini Led backboard glass defect - Google Patents
Tin bath for improving Mini Led backboard glass defect Download PDFInfo
- Publication number
- CN115677185A CN115677185A CN202211473017.XA CN202211473017A CN115677185A CN 115677185 A CN115677185 A CN 115677185A CN 202211473017 A CN202211473017 A CN 202211473017A CN 115677185 A CN115677185 A CN 115677185A
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- China
- Prior art keywords
- tin bath
- tin
- temperature area
- mini led
- improving
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 239000011521 glass Substances 0.000 title claims abstract description 49
- 230000007547 defect Effects 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 45
- 230000000694 effects Effects 0.000 abstract description 5
- 230000000979 retarding effect Effects 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- 229910001887 tin oxide Inorganic materials 0.000 description 3
- 239000005329 float glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- 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
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- Glass Compositions (AREA)
Abstract
The invention discloses a tin bath for improving the defect of Mini Led backboard glass, and belongs to the technical field of tin baths for producing Mini Led backboard glass. The technical scheme is as follows: the tin bath comprises a tin bath body, wherein the tin bath body is provided with a high-temperature area, a medium-temperature area and a low-temperature area; fixed bases are respectively arranged at one ends of the middle temperature area and the low temperature area close to the outlet, a rotating shaft is arranged on the tin bath body above the fixed bases and is driven to rotate by a motor; two guide plates are axially arranged at the upper part of the rotating shaft and are arranged in a V shape; every guide plate comprises one row of guide rod, and the thermocouple sensor is installed at the top of guide rod, and motor and thermocouple sensor respectively with control system electric connection. The invention has the effect of retarding the backflow of the molten tin through the fixed base and the guide plate, and avoids the influence on the micro-wave degree of the glass caused by the turbulent motion of the molten tin; the transverse temperature difference of the tin liquid can be controlled by adjusting the angle of the guide plate, and the lower surface quality of the glass is improved.
Description
Technical Field
The invention relates to the technical field of tin baths for producing Mini Led backboard glass, in particular to a tin bath for improving the defects of the Mini Led backboard glass.
Background
In the production of float glass, tin liquid generates strong forward flow due to the traction of a glass belt, and meanwhile, deep backflow and surface layer edge backflow are caused due to the temperature difference, so that the backflow turbulence of the tin liquid at the outlet of a tin bath is rapid, the intersection condition of cold and hot tin liquids in the middle section of the tin bath is complex, the liquid flow is disordered, the tin liquid with the lower temperature in a low-temperature area easily flows back to a middle-temperature area, and even flows back to a high-temperature area, so that the large transverse temperature difference is caused, and the establishment of longitudinal temperature gradient is not facilitated. Meanwhile, the defect that the low-temperature area contains a large amount of tin pollution can flow back to the medium-temperature area and the high-temperature area, and the defects on various boards and below the boards are easily caused; in addition, when the low-temperature tin liquid reflows to the middle-temperature region and the high-temperature region to be heated for the second time, a large amount of heat is consumed.
In order to solve the above problems, graphite retaining ridges are generally fixed on the tin bath floor tiles to play a role in blocking the backflow tin liquid, but the mode is not only passive and lagged, but also the effect is not ideal. Compared with the common float glass, the Mini Led electronic backboard glass has stricter requirements on the lower surface defects and the microwave waviness of the glass, so that a tin bath with better tin liquor backflow retarding effect is needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the tin bath overcomes the defects of the prior art, and the tin bath for improving the defects of the Mini Led backboard glass can play a role in retarding the backflow of molten tin through the fixed base and the guide plate, retard longitudinal convection and avoid the influence on the microwave waviness of the glass caused by the turbulent motion of the molten tin; on the other hand, the flow velocity of the molten tin can be controlled by adjusting the angle of the guide plate, so that the transverse temperature difference of the glass belt is reduced, and the lower surface quality of the glass is improved.
The technical scheme of the invention is as follows:
the tin bath for improving the defect of the Mini Led backboard glass comprises a tin bath body, wherein the tin bath body is provided with a high-temperature area, a medium-temperature area and a low-temperature area; fixed bases are respectively arranged at one ends of the middle temperature area and the low temperature area close to the outlet, a rotating shaft is arranged on the tin bath body above the fixed bases and is driven to rotate by a motor; two guide plates are axially arranged at the upper part of the rotating shaft and are arranged in a V shape; each guide plate is composed of a row of guide rods, a thermocouple sensor is installed at the top of each guide rod, and the motor and the thermocouple sensor are respectively electrically connected with the control system.
Preferably, the diversion rod is provided with an electric heating resistance wire, and the electric heating resistance wire is electrically connected with the control system.
Preferably, an electromagnetic coil is arranged inside the fixed base and electrically connected with the control system.
Preferably, a plurality of flow velocity sensors are installed in the tin bath body and are electrically connected with the control system.
Preferably, a cooling water pipe is further arranged in the fixed base.
Preferably, the output shaft of the motor is connected with the rotating shaft through a transmission mechanism.
Preferably, the guide rod is made of tungsten-copper alloy with graphite plated on the surface.
Compared with the prior art, the invention has the following beneficial effects:
1. on one hand, the tin bath has the effect of retarding the backflow of molten tin through the fixed base and the guide plate, and the longitudinal convection is retarded, so that the influence on the microwave texture degree of glass caused by the turbulent motion of the molten tin is avoided; on the other hand, thereby still can control the horizontal difference in temperature of tin liquid velocity of flow through the angle of adjustment guide plate and reduce the glass area, avoid leading to the production of glass lower surface scotch class defect because of the difference in temperature problem, improve glass's lower surface quality.
2. According to the invention, the electric heating resistance wire is arranged on the flow guide rod, so that the tin liquor at different transverse positions can be heated in a targeted manner, the transverse temperature of the tin liquor is finally consistent, the viscosity of the glass is finally consistent, and the lower surface performance of the glass is finally consistent, thereby achieving the purpose of controlling the defects of the lower surface of the glass.
3. The electromagnetic coil is arranged in the fixed base, so that on one hand, various impurities such as oxides contained in the tin liquor can be induced to the surface, and the impurities are removed in the modes of slagging-off and the like, so that the lower surface of the glass is prevented from being damaged by the oxides; on the other hand, the flow speed of the tin liquid in the tin bath can be controlled by changing the voltage applied to the electromagnetic coil.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a schematic structural view of the guide rod of the present invention.
Fig. 4 is a schematic view of the mounting position of the electromagnetic coil of the present invention.
Fig. 5 is a schematic view of the connection mode of the rotating shaft and the motor of the invention.
In the figure, 1, a tin bath body; 101. a high temperature zone; 102. a medium temperature zone; 103. a low temperature zone; 4. a fixed base; 5. a rotating shaft; 6. a motor; 7. a baffle; 701. a guide rod; 8. a thermocouple sensor; 9. an electric heating resistance wire; 10. an electromagnetic coil; 11. a cooling water pipe; 12. a transmission mechanism; 13. a flow rate sensor.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-2, the present embodiment provides a tin bath for improving defects of Mini Led backplane glass, which includes a tin bath body 1, wherein the tin bath body 1 adopts a main structure of an existing tin bath, and the tin bath body 1 is provided with a high temperature area 101, a medium temperature area 102, and a low temperature area 103. The fixed bases 4 are respectively arranged in the middle temperature area 102 and at one end of the low temperature area 103 close to the outlet, so that the tin liquor in the low temperature area 103 is prevented from flowing back to the middle temperature area 102 and even the high temperature area 101 to a certain extent. Still be provided with condenser tube 11 in the unable adjustment base 4, let in the cooling water that flows in condenser tube 11 for lower the temperature to the tin liquid in the molten tin bath. A rotating shaft 5 is arranged above the fixed base 4 on the tin bath body 1, and the rotating shaft 5 is driven by a motor 6 to rotate. As shown in fig. 5, the mode of driving the rotating shaft 5 to rotate by the motor 6 may be a mode of driving by the transmission mechanism 12, and the transmission mechanism 12 may be a mode of connecting a gear and a chain, that is, the output shaft of the motor 6 is connected with the rotating shaft 5 by the gear and the chain, which is prior art and will not be described herein again. Two guide plates 7 are axially arranged at the upper part of the rotating shaft 5, and the two guide plates 7 are arranged in a V shape; as shown in fig. 3, each guide plate 7 is formed by a row of guide rods 701, a thermocouple sensor 8 is installed at the top of each guide rod 701, and the motor 6 and the thermocouple sensor 8 are respectively electrically connected with the control system. The guide plate 7 is made of a material which has excellent heat-conducting property, wear resistance and hardness and does not react with pure tin and molten glass, such as tungsten-copper alloy with graphite plated on the surface.
The working principle is as follows:
the tin liquid flows from the high-temperature area 101 to the medium-temperature area 102 and the low-temperature area 103 in the tin bath body 1, after the tin liquid flows into the low-temperature area 103, the tin liquid can be effectively blocked due to the blocking of the fixed base 4 at the near-outlet of the medium-temperature area 102 and the low-temperature area 103 and the guide plate 7 above the fixed base, so that on one hand, the tin liquid with lower temperature can be prevented from flowing back to the medium-temperature area 102 and the high-temperature area 101, the transverse temperature difference of the tin liquid caused by backflow is greatly improved, and the establishment of longitudinal temperature gradient is facilitated; on the other hand, the defects of various boards above and below the board caused by the fact that the low-temperature area 103 contains a large amount of tin pollution and the defects flow back to the medium-temperature area 102 and the high-temperature area 101 are greatly reduced, and meanwhile, the heat consumed by the low-temperature tin liquid flowing back to the medium-temperature area 102 and the high-temperature area 101 is also reduced; in addition, the tin liquid reflowing from the low temperature area 103 can be further mixed at the position under the blocking action of the fixed base 4 and the guide plate 7, so that the heat is fully conducted.
The thermocouple sensor 8 on the guide rod 701 detects the temperature of the molten tin in the middle to the edge of the molten tin bath body 1 in real time, wherein the temperature in the middle of the glass plate is highest, and the temperature from the middle to the edge is gradually reduced, namely, the temperature difference is generated. The highest temperature value in the middle of the glass plate is used as a reference temperature value, an allowable temperature difference high limit value is preset in the control system, and when the difference value between the temperature measured by the rest thermocouple sensors 8 and the reference temperature value exceeds the high limit value, the transverse temperature difference of the molten tin is too large, adjustment is needed, or the glass performance is influenced. At this moment, the control system starts the motor 6 to drive the rotating shaft 5 to rotate, so that the guide plate 7 above the fixed base 4 and close to the tin liquid inflow end rotates for a certain angle towards the standing direction to increase the resistance of the guide plate 7 to the flowing tin liquid and reduce the inflow of the tin liquid, thereby reducing the flowing speed of the tin liquid, promoting the transverse flow of the tin liquid when the tin liquid is blocked, and further reducing the transverse temperature difference. The rotation angle is kept for a period of time, the temperature difference change is monitored, if the temperature difference does not fall below the high limit value in the period of time, the guide plate 7 above the fixed base 4 and close to the tin liquid inflow end is continuously rotated for a certain angle in the vertical direction until the temperature difference falls below the high limit value.
Because the device retards strong tin liquid backflow, the tin liquid backflow is stable, the amount of tin liquid with lower temperature in the low-temperature area 103 flowing back to the medium-temperature area 102 and the high-temperature area 101 is reduced, the influence on the micro-wave degree of the glass caused by the turbulent motion of the tin liquid is reduced, the establishment of the longitudinal gradient of the tin bath is also ensured, and the flattening polishing effect of the glass in a flattening area and the thinning effect of the glass in a thinning area are ensured. In addition, the tin liquid has a layer of immobile layer inside, which accumulates a great deal of tin oxide, when the width and the speed of the glass plate change, the immobile layer fluctuation can cause a great deal of tin oxide to be released, and the quality of the lower surface of the glass is seriously affected. The device can regularly and programmatically adjust the inclination angle of the guide plate 7, thereby artificially changing the convection of the tin liquid, releasing the tin oxide in the immobile layer in time and ensuring the quality of the lower surface of the glass.
Example 2
On the basis of embodiment 1, as shown in fig. 3, the diversion rod 701 is provided with a heating resistor wire 9, and the heating resistor wire 9 is electrically connected with the control system. By adjusting the inclination angle of the guide plate 7, after the transverse temperature difference of the tin liquid is reduced to the allowable high limit value, the control system can pertinently electrify the electrothermal resistance wires 9 on some conductive rods 701 according to the tin liquid temperature detected by the thermocouple sensors 8 with different temperature measuring points so as to heat the tin liquid at the position, thereby enabling the tin liquid temperature at different transverse positions to be consistent, and ensuring the uniformity of the whole transverse temperature of the glass plate. The viscosity of the glass is determined by the temperature, and if the temperature is inconsistent, the viscosity of the glass is inconsistent, so that the lower surface performance of the glass is inconsistent, defects such as scratches and the like easily occur at an outlet, and various defects caused by uneven stress such as warping and the like easily occur. And through the inclination of adjustment guide plate, earlier with the horizontal difference in temperature of tin liquid fall to below the high limit value, the temperature of the tin liquid of horizontal different positions is adjusted through the electrothermal resistance silk 9 of this embodiment to the ground afterwards for the horizontal temperature of tin liquid keeps unanimous, finally makes glass viscosity unanimous, lower surface performance unanimous, thereby reaches the purpose of control glass lower surface defect.
Example 3
On the basis of the embodiment 2, as shown in fig. 4, a plurality of flow velocity sensors 13 are installed in the tin bath body 1, and the flow velocity sensors 13 can be arranged at different heights of the tin bath and at the bottom of the tin bath body 1; the fixed base 4 is internally provided with an electromagnetic coil 10, and the flow velocity sensor 13 and the electromagnetic coil 10 are respectively electrically connected with a control system.
The current is introduced to the electromagnetic coil 10 through the control system, the electromagnetic coil 10 generates an electromagnetic field, on one hand, various impurities such as oxides contained in tin liquid can be induced to the surface, and the impurities are removed in the modes of slagging-off and the like, so that the damage of the oxides to the lower surface of the glass is avoided. On the other hand, the electromagnetic field can generate resistance to the molten tin in the tin bath body 1, and the resistance to the molten tin is different when the voltage applied to the electromagnetic coil 10 is different; therefore, a proper tin liquid flow speed range can be preset in the control system, when the flow speed sensor 13 detects that the tin liquid flow speed is too high, the voltage of the electromagnetic coil 10 can be increased, and the resistance to the tin liquid is increased, so that the tin liquid flow speed is reduced, and the glass is prevented from swinging due to too large turbulent motion of the tin liquid; when the flow velocity sensor 13 detects that the flow velocity of the molten tin is too low, the voltage of the electromagnetic coil 10 can be reduced, and the resistance to the molten tin is reduced, so that the flow velocity of the molten tin is accelerated, and impurities such as oxides and the like cannot be induced by the electromagnetic coil are avoided. The flow speed of the tin liquid can be flexibly adjusted by adjusting the magnitude of the electromagnetic field force generated by the electromagnetic coil 10.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The tin bath for improving the defects of the Mini Led backboard glass comprises a tin bath body (1), wherein the tin bath body (1) is provided with a high-temperature area (101), a medium-temperature area (102) and a low-temperature area (103); the tin bath is characterized in that a fixed base (4) is respectively arranged at one end of the middle temperature area (102) and one end of the low temperature area (103) close to the outlet, a rotating shaft (5) is arranged on the tin bath body (1) above the fixed base (4), and the rotating shaft (5) is driven to rotate by a motor (6); two guide plates (7) are axially arranged at the upper part of the rotating shaft (5), and the two guide plates (7) are arranged in a V shape; each guide plate (7) is composed of a row of guide rods (701), a thermocouple sensor (8) is installed at the top of each guide rod (701), and the motor (6) and the thermocouple sensor (8) are respectively electrically connected with the control system.
2. The tin bath for improving the defects of the Mini Led backboard glass according to claim 1, wherein the flow guide rod (701) is provided with a heating resistance wire (9), and the heating resistance wire (9) is electrically connected with a control system.
3. The tin bath for improving the defect of the Mini Led backboard glass according to the claim 1 or 2, wherein the fixing base (4) is internally provided with an electromagnetic coil (10), and the electromagnetic coil (10) is electrically connected with a control system.
4. The tin bath for improving the defects of the Mini Led backboard glass according to claim 3, wherein a plurality of flow rate sensors (13) are installed in the tin bath body (1), and the flow rate sensors (13) are electrically connected with a control system.
5. The tin bath for improving the defect of the Mini Led backboard glass according to the claim 1 or 2, wherein a cooling water pipe (11) is further arranged in the fixing base (4).
6. The tin bath for improving the defect of the Mini Led backboard glass according to the claim 1 or 2, wherein the output shaft of the motor (6) is connected with the rotating shaft (5) through a transmission mechanism (12).
7. The tin bath for improving the defects of the Mini Led backboard glass according to the claim 1 or 2, wherein the flow guide rods (701) are made of tungsten-copper alloy with graphite plated on the surface.
Priority Applications (1)
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CN202211473017.XA CN115677185B (en) | 2022-11-23 | 2022-11-23 | Tin bath for improving glass defects of Mini Led backboard |
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CN202211473017.XA CN115677185B (en) | 2022-11-23 | 2022-11-23 | Tin bath for improving glass defects of Mini Led backboard |
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CN115677185A true CN115677185A (en) | 2023-02-03 |
CN115677185B CN115677185B (en) | 2024-02-09 |
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RU2291122C1 (en) * | 2005-05-26 | 2007-01-10 | Открытое акционерное общество "Саратовский институт стекла" | Method and device for control of gas flows of protective atmosphere in glass bath in production of float-glass |
CN102583968A (en) * | 2012-01-19 | 2012-07-18 | 河南国控宇飞电子玻璃有限公司 | Skimming machine for producing ultra-thin glass |
CN102923937A (en) * | 2012-11-22 | 2013-02-13 | 中国建材国际工程集团有限公司 | Tin liquor processing method for float glass and ultra-thin float glass |
CN105776825A (en) * | 2014-12-26 | 2016-07-20 | 吴江南玻玻璃有限公司 | Float glass production equipment |
CN206799422U (en) * | 2017-06-08 | 2017-12-26 | 中国洛阳浮法玻璃集团有限责任公司 | A kind of molten tin backflow guide device for float glass tin bath tail end |
WO2018207162A1 (en) * | 2017-05-12 | 2018-11-15 | Saint-Gobain Glass France | Improved method and installation for the production of flat glass by a float glass process |
CN109455908A (en) * | 2018-12-29 | 2019-03-12 | 长兴旗滨玻璃有限公司 | Float glass tin bath, floatation glass production line and ultra-thin glass preparation process |
CN212051115U (en) * | 2020-05-11 | 2020-12-01 | 河南省安装集团有限责任公司 | Float glass tin bath |
-
2022
- 2022-11-23 CN CN202211473017.XA patent/CN115677185B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2291122C1 (en) * | 2005-05-26 | 2007-01-10 | Открытое акционерное общество "Саратовский институт стекла" | Method and device for control of gas flows of protective atmosphere in glass bath in production of float-glass |
CN102583968A (en) * | 2012-01-19 | 2012-07-18 | 河南国控宇飞电子玻璃有限公司 | Skimming machine for producing ultra-thin glass |
CN102923937A (en) * | 2012-11-22 | 2013-02-13 | 中国建材国际工程集团有限公司 | Tin liquor processing method for float glass and ultra-thin float glass |
CN105776825A (en) * | 2014-12-26 | 2016-07-20 | 吴江南玻玻璃有限公司 | Float glass production equipment |
WO2018207162A1 (en) * | 2017-05-12 | 2018-11-15 | Saint-Gobain Glass France | Improved method and installation for the production of flat glass by a float glass process |
CN206799422U (en) * | 2017-06-08 | 2017-12-26 | 中国洛阳浮法玻璃集团有限责任公司 | A kind of molten tin backflow guide device for float glass tin bath tail end |
CN109455908A (en) * | 2018-12-29 | 2019-03-12 | 长兴旗滨玻璃有限公司 | Float glass tin bath, floatation glass production line and ultra-thin glass preparation process |
CN212051115U (en) * | 2020-05-11 | 2020-12-01 | 河南省安装集团有限责任公司 | Float glass tin bath |
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