CN212334989U - Cover plate glass kiln - Google Patents
Cover plate glass kiln Download PDFInfo
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- CN212334989U CN212334989U CN202020532196.XU CN202020532196U CN212334989U CN 212334989 U CN212334989 U CN 212334989U CN 202020532196 U CN202020532196 U CN 202020532196U CN 212334989 U CN212334989 U CN 212334989U
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- plate
- glass
- type molybdenum
- molybdenum electrode
- electrode
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- 239000005357 flat glass Substances 0.000 title claims abstract description 23
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 88
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 88
- 239000011733 molybdenum Substances 0.000 claims abstract description 88
- 239000011521 glass Substances 0.000 claims abstract description 73
- 238000002844 melting Methods 0.000 claims abstract description 39
- 230000008018 melting Effects 0.000 claims abstract description 39
- 210000000481 breast Anatomy 0.000 claims abstract description 10
- 239000011819 refractory material Substances 0.000 claims abstract description 7
- 239000010431 corundum Substances 0.000 claims abstract description 6
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 6
- 239000006060 molten glass Substances 0.000 claims description 17
- 239000006059 cover glass Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- GCXRJCOLMDSPJS-UHFFFAOYSA-N [Mo]=O.[Zr] Chemical compound [Mo]=O.[Zr] GCXRJCOLMDSPJS-UHFFFAOYSA-N 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 25
- 239000007788 liquid Substances 0.000 abstract description 22
- DDHXQDUQHLEATR-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[Zr+4].[Mo+4] Chemical compound [O-2].[O-2].[O-2].[O-2].[Zr+4].[Mo+4] DDHXQDUQHLEATR-UHFFFAOYSA-N 0.000 abstract description 5
- 238000005352 clarification Methods 0.000 abstract description 3
- 238000000265 homogenisation Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006066 glass batch Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
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- Glass Melting And Manufacturing (AREA)
- Furnace Details (AREA)
Abstract
A cover plate glass kiln comprises a glass melting tank which is formed by encircling a crown at the top, breast walls on the periphery and a tank bottom at the bottom, wherein a plurality of uniformly distributed plate-type molybdenum electrodes are inserted and matched on the tank bottom of the glass melting tank, and a propulsion device is fixedly arranged at the bottom of each plate-type molybdenum electrode and propels the plate-type molybdenum electrodes to vertically move. The horizontal long edge of the plate-type molybdenum electrode is smaller than the horizontal short edge of the glass melting tank, and the horizontal long edge of the plate-type molybdenum electrode is parallel to the horizontal short edge of the glass melting tank and is uniformly distributed on the bottom of the tank in a single row along the horizontal long edge direction of the glass melting tank. The plate-type molybdenum electrode is a zirconium oxide molybdenum electrode, and the crown, the breast wall and the pool bottom are all made of refractory material corundum. Through the increase heating area of board-like molybdenum electrode, improve heating efficiency, board-like molybdenum electrode sets up in cover plate glass kiln bottom for glass liquid in the cover plate glass kiln is heated evenly, can accelerate the speed of dissolving the glass raw materials, promotes the flow of glass liquid, promotes glass's clarification and homogenization.
Description
Technical Field
The utility model relates to a glass makes technical field, specifically is an apron glass kiln.
Background
A glass furnace is a thermal equipment for melting glass batch in glass manufacturing, which melts and clarifies the distributed powder and added clinker (cullet) according to the glass composition at high temperature in the furnace to form glass liquid meeting the molding requirement. And the main structure part of the kiln comprises a melting part device, a clarification and uniform part device and a stirring and foam discharging part device. The cover plate glass kiln is used for manufacturing a glass sheet meeting requirements and used in the technical field of cover plates by melting at high temperature, clarifying to form glass liquid and then using a special molding process technology. In the raw material heating and melting stage, the refractory materials of the glass furnace are strongly corroded by excessively high melting temperature, the service life of the furnace is shortened, the heat permeability of glass liquid and the heat dissipation of the furnace to the periphery cause temperature nonuniformity, so that the produced glass product has defects such as bubbles and ripples, and the quality of finished glass is seriously influenced. The existing cover plate glass kiln heats and melts glass batch materials through tin oxide electrode rods arranged on the side wall of the kiln, and the problems of low heating efficiency, non-uniform heating and poor thermal stability of the cover plate glass kiln exist in the heating process, so that the quality of formed cover plate glass is reduced.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides an apron glass kiln, heating efficiency is high, and the heating is even, and thermal stability is high, long service life.
The utility model discloses a realize through following technical scheme:
a cover plate glass kiln comprises a glass melting tank which is surrounded by a crown at the top, breast walls at the periphery and a tank bottom at the bottom, wherein a plurality of uniformly distributed plate-type molybdenum electrodes are inserted and matched on the tank bottom of the glass melting tank, and a propelling device is fixedly arranged at the bottom of each plate-type molybdenum electrode and used for propelling the plate-type molybdenum electrodes to vertically move.
Preferably, the horizontal long edge of the plate-type molybdenum electrode is smaller than the horizontal short edge of the glass melting tank, and the horizontal long edge of the plate-type molybdenum electrode is parallel to the horizontal short edge of the glass melting tank and is uniformly distributed on the bottom of the tank in a single row along the horizontal long edge direction of the glass melting tank.
Preferably, the distance between the plate-type molybdenum electrodes is more than 1000 mm.
Preferably, the depth of the molten glass in the glass melting tank is not less than 900mm, and the distance from the top of the plate-type molybdenum electrode to the bottom surface of the tank is 20mm to 100 mm.
Preferably, the horizontal long side of the plate-type molybdenum electrode is 1500mm to 2000mm, the horizontal short side of the plate-type molybdenum electrode is 200mm to 500mm, and the overall height of the plate-type molybdenum electrode is 500mm to 600 mm.
Preferably, the plate-type molybdenum electrode is formed by assembling a plurality of cuboid small electrode assembling bodies with the same length in an array manner in the width direction and the height direction, the array is assembled by transversely distributing two to three blocks, and longitudinally distributing three to eight blocks.
Preferably, a water cooling device is fixedly arranged between the plate-type molybdenum electrode and the propelling device.
Preferably, the plate-type molybdenum electrode is a zirconium oxide molybdenum electrode.
Preferably, the main arch, the breast wall and the pool bottom are all made of refractory material corundum.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model provides a pair of cover plate glass kiln increases heating area through board-like molybdenum electrode, improves heating efficiency, and board-like molybdenum electrode sets up in cover plate glass kiln bottom for glass liquid in the cover plate glass kiln is heated evenly, can accelerate the speed of dissolving the glass raw materials, promotes the flow of glass liquid, promotes glass's clarification and homogenization. Guarantee the heating efficiency of board-like molybdenum electrode through advancing device, advance the length that keeps board-like molybdenum electrode in the bottom and stabilize, guarantee heating efficiency, and the bottom advances to do not have both sides and impel the relative error that produces in advancing the process, and board-like molybdenum electrode advances the in-process and reduces the influence to glass liquid temperature, has increased thermal stability, the reliable temperature of adjusting the glass liquid to keep the homogeneity of temperature.
Further, the horizontal long edge of the plate-type molybdenum electrode is smaller than the horizontal short edge of the glass melting tank, the horizontal long edge of the plate-type molybdenum electrode is parallel to the horizontal short edge of the glass melting tank, the plate-type molybdenum electrode is uniformly distributed on the bottom of the tank along the horizontal long edge direction of the glass melting tank in a single row, the plate-type molybdenum electrode is heated through the single row integral distribution, the heating area is increased, the heating efficiency is improved, the influence of uneven electrode distribution on the temperature is reduced, and the glass liquid is heated uniformly.
Furthermore, the distance between the plate-type molybdenum electrodes is larger than 1000mm, so that the phenomenon that the electrodes are densely distributed to cause local overheating and cause uneven heating is avoided.
Furthermore, the depth of the glass liquid in the glass melting tank is not less than 900mm, and the distance from the top of the plate-type molybdenum electrode to the bottom surface of the tank is 20mm to 100 mm. The molybdenum electrode is prevented from being oxidized by contacting with gas.
Further, the plate-type molybdenum electrode is formed by assembling a plurality of cuboid small electrode assembling bodies, and the whole plate-type molybdenum electrode is formed by assembling, so that the plate-type molybdenum electrode is convenient to install, disassemble and replace.
Furthermore, a water cooling device is fixedly arranged between the plate-type molybdenum electrode and the propelling device. The temperature of the plate-type molybdenum electrode is controlled, the oxidation of the electrode is slowed down through a water cooling device, and the service life of the electrode is prolonged.
Furthermore, the plate-type molybdenum electrode is a zirconium oxide molybdenum electrode, so that the corrosion resistance and the creep resistance are improved, and the service life is prolonged.
Furthermore, the crown, the breast wall and the pool bottom are all made of refractory materials corundum, so that the heat diffusion of molten glass is reduced, the heat preservation effect is enhanced, and the temperature of the molten glass is uniform.
Drawings
FIG. 1 is a schematic front view of a cover plate glass kiln of the present invention;
FIG. 2 is a schematic top view of a cover glass furnace according to the present invention;
in the figure: 1 is a big arch; 2 is a breast wall; 3 is a plate-type molybdenum electrode; 4 is the bottom of the tank; 5 is a cuboid small electrode assembly body.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.
As shown in fig. 1 and 2, the cover plate glass kiln comprises a glass melting tank which is surrounded by a crown 1 at the top, a breast wall 2 at the periphery and a tank bottom 4 at the bottom, wherein a plurality of uniformly distributed plate-type molybdenum electrodes 3 are inserted and matched on the tank bottom 4 of the glass melting tank, and a propelling device is fixedly arranged at the bottom of each plate-type molybdenum electrode 3 and used for propelling the plate-type molybdenum electrodes 3 to vertically move. Increase the heating area through plate-type molybdenum electrode 3, the heating efficiency is improved, plate-type molybdenum electrode 3 sets up in cover plate glass kiln bottom, make the glass liquid in the cover plate glass kiln be heated evenly, guarantee plate-type molybdenum electrode 3's heating efficiency through advancing device, and advance the length stability that keeps plate-type molybdenum electrode in the bottom, guarantee heating efficiency, and the bottom advances to have not both sides to advance the relative error that produces in advancing the process, plate-type molybdenum electrode 3 advances the influence of in-process to glass liquid temperature and reduces, the thermal stability has been increased.
When the plate-type molybdenum electrode 3 arranged at the bottom of the tank is electrified, the molten glass in a molten state is a conductor, and the molten glass between the two electrodes generates heat. At this point, the glass temperature near the electrode tip is at its highest, where the temperature can even reach 1700 ℃ or higher. Due to the difference of the specific gravity of the glass liquid, the glass liquid flow is formed near the electrode, and the glass of each layer in the depth direction of the cell fully participates in the flow, so that the problem caused by glass delamination is eliminated. The heat release of the electrode tip in the molten glass and the resulting glass flow increases the temperature of the underlying molten glass, accelerates the rate of dissolution of the quartz particles, and promotes fining and homogenization of the glass.
The plate-type molybdenum electrode 3 is vertically inserted into the bottom 4 of the glass melting tank, the cross section of the plate-type molybdenum electrode in the horizontal direction is rectangular and is divided into a long horizontal side and a short horizontal side, and the cross section of the corresponding glass melting tank in the horizontal direction is also rectangular and is divided into a long horizontal side and a short horizontal side.
The horizontal long edge of the plate-type molybdenum electrode 3 is smaller than the horizontal short edge of the glass melting tank, and the horizontal long edge of the plate-type molybdenum electrode 3 is parallel to the horizontal short edge of the glass melting tank and is uniformly distributed on the tank bottom 4 along the horizontal long edge of the glass melting tank in a single row. The distance between the plate-type molybdenum electrodes 3 is more than 1000 mm.
The whole transverse width of the plate-type molybdenum electrode 3 is less than the width of the kiln, and the horizontal long edge of the plate-type molybdenum electrode 3 is about 1500mm to 2000 mm. The overall longitudinal length and horizontal short side are about 200mm to 500mm, and the overall height is lower than the molten glass in the kiln and is about 500mm to 600 mm.
The depth of the glass liquid in the glass melting tank is not less than 900mm, the top of the plate-type molybdenum electrode 3 is higher than the bottom surface of the tank, the distance from the top of the plate-type molybdenum electrode 3 to the bottom surface is 20mm to 100mm, and the top of the plate-type molybdenum electrode 3 is lower than the glass liquid level.
The front wall of the furnace body of the cover plate glass furnace is provided with a feed inlet and a flue port, the rear wall of the furnace body is provided with a discharge outlet communicated with a platinum channel, and a plate-type molybdenum electrode 3 is inserted into the furnace through a preformed hole of the bottom structure of the furnace on the bottom of a glass melting tank. A water cooling device is fixedly arranged between the plate-type molybdenum electrode 3 and the propulsion device to control the temperature of the plate-type molybdenum electrode 3.
The plate-type molybdenum electrode 3 can be formed by assembling a plurality of cuboid small electrode assembling bodies 5 with the same length in an array manner in the width and height directions; the array assembly is characterized in that two to three blocks are transversely distributed, and three to eight blocks are longitudinally distributed. The plate-shaped cuboid small electrode assembling bodies 5 with the same heights as the plate-shaped molybdenum electrodes 3 are assembled to form a complete plate-shaped molybdenum electrode 3, the plate-shaped cuboid small electrode assembling bodies are fixed through holes which are formed in the bottom of the pool 4 and matched with the plate-shaped molybdenum electrodes 3 in an inserting mode, integral propulsion is carried out in the propulsion process, the cuboid small electrode assembling bodies 5 cannot be dislocated in the propulsion process, and the heating efficiency of the plate-shaped molybdenum electrodes 3 is guaranteed. The heating temperature of the plate-type molybdenum electrode 3 is adjusted, so that the internal temperature and the surface temperature of the molten glass can meet the requirements of the production process of cover plate glass.
The plate-type molybdenum electrode 3 is electrified to convert electric energy into heat energy so as to achieve the purpose of melting cover plate glass, the plate-type molybdenum electrode 3 extends into the inner surface of the tank furnace for a distance which does not exceed the surface of molten glass, the temperature inside the molten glass is slightly higher than the temperature of the surface of the molten glass, but thermal cycle is not formed.
The crown 1, the breast wall 2 and the tank bottom 4 are all made of refractory material corundum, and the glass melting tank is made of the refractory material corundum, so that the heat diffusion of glass liquid is reduced, the over-low temperature close to the tank wall is avoided, and the temperature of the glass liquid is uniform. The plate-type molybdenum electrode 3 is a zirconium oxide molybdenum electrode, and the zirconium oxide molybdenum electrode can obviously improve the performance of the molybdenum electrode and has stronger corrosion resistance and creep resistance. The use of a zirconia molybdenum electrode in a glass furnace can enhance the useful length of the electrode while reducing the risk of the electrode sagging or even breaking during operation.
The melting of the molten glass is realized by heating the plate-type molybdenum electrode 3, wherein the electrode is positioned below the liquid level of the glass, and the temperature inside the molten glass is slightly higher than the temperature of the surface of the molten glass. The plate-type molybdenum electrode 3 is used as a heating electrode, has the properties of strong electric conductivity, high-temperature strength, good high-temperature oxidation resistance, strong corrosion resistance, no coloring to cover plate glass and the like, and can meet the heating requirement of high-quality glass liquid.
The plate-type molybdenum electrode 3 can be pushed to use in the melting furnace, the length of the electrode is kept stable, the surface current intensity of the electrode is kept stable, and the electrode is not gradually reduced like a fixed electrode, so that the furnace is stable in work, the operation of a control system is correspondingly simple, and the production reliability is improved; and the molybdenum electrode is not easy to oxidize and can be used for heating glass liquid with different requirements. The electrode is periodically pushed in during the use process, so that the length of the electrode in the smelting furnace is kept stable, the surface current intensity of the electrode is kept stable, and the quality of the molten glass is kept stable.
Claims (9)
1. A cover plate glass kiln is characterized by comprising a glass melting tank surrounded by a crown (1) at the top, a breast wall (2) at the periphery and a tank bottom (4) at the bottom, wherein a plurality of uniformly distributed plate-type molybdenum electrodes (3) are inserted and matched on the tank bottom (4) of the glass melting tank, and a propelling device is fixedly arranged at the bottom of each plate-type molybdenum electrode (3) and used for propelling the plate-type molybdenum electrodes (3) to vertically move.
2. The cover glass furnace according to claim 1, wherein the horizontal long side of the plate-type molybdenum electrode (3) is smaller than the horizontal short side of the glass melting tank, and the horizontal long side of the plate-type molybdenum electrode (3) is parallel to the horizontal short side of the glass melting tank and is uniformly distributed on the tank bottom (4) along the horizontal long side of the glass melting tank in a single row.
3. A cover glass furnace according to claim 1, characterized in that the distance between the plate-type molybdenum electrodes (3) is more than 1000 mm.
4. The cover glass furnace according to claim 1, wherein the depth of the molten glass in the glass melting tank is not less than 900mm, and the distance from the top of the plate-type molybdenum electrode (3) to the bottom surface of the tank bottom (4) is 20mm to 100 mm.
5. The cover glass furnace according to claim 1, wherein the plate-type molybdenum electrode (3) has a long horizontal side of 1500mm to 2000mm, a short horizontal side of 200mm to 500mm, and an overall height of 500mm to 600 mm.
6. The cover plate glass kiln furnace as claimed in claim 1, wherein the plate-type molybdenum electrode (3) is formed by assembling a plurality of cuboid small electrode assembling bodies (5) with the same length in an array manner in the width and height directions, and the array assembling is transversely distributed with two to three blocks and longitudinally distributed with three to eight blocks.
7. The cover glass kiln furnace as claimed in claim 1, characterized in that a water cooling device is fixedly arranged between the plate-type molybdenum electrode (3) and the propelling device.
8. The cover glass furnace according to claim 1, characterized in that the plate-type molybdenum electrode (3) is a zirconium-molybdenum-oxide electrode.
9. The cover glass kiln as claimed in claim 1, characterised in that the crown (1), the breast wall (2) and the bath bottom (4) are made of corundum, which is a refractory material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532196.XU CN212334989U (en) | 2020-04-10 | 2020-04-10 | Cover plate glass kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532196.XU CN212334989U (en) | 2020-04-10 | 2020-04-10 | Cover plate glass kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212334989U true CN212334989U (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020532196.XU Active CN212334989U (en) | 2020-04-10 | 2020-04-10 | Cover plate glass kiln |
Country Status (1)
| Country | Link |
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| CN (1) | CN212334989U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998883A (en) * | 2021-10-15 | 2022-02-01 | 南京玻璃纤维研究设计院有限公司 | Glass fiber drawing furnace and method for preparing glass fiber by adopting same |
| CN116750951A (en) * | 2023-05-29 | 2023-09-15 | 湖北华强日用玻璃有限公司 | Method for oxygen-free baking of glass kiln |
| CN119390325A (en) * | 2024-12-31 | 2025-02-07 | 彩虹显示器件股份有限公司 | A sealing device and method for a molybdenum electrode heating element of a substrate glass kiln |
-
2020
- 2020-04-10 CN CN202020532196.XU patent/CN212334989U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113998883A (en) * | 2021-10-15 | 2022-02-01 | 南京玻璃纤维研究设计院有限公司 | Glass fiber drawing furnace and method for preparing glass fiber by adopting same |
| CN113998883B (en) * | 2021-10-15 | 2023-04-07 | 南京玻璃纤维研究设计院有限公司 | Glass fiber drawing furnace and method for preparing glass fiber by adopting same |
| CN116750951A (en) * | 2023-05-29 | 2023-09-15 | 湖北华强日用玻璃有限公司 | Method for oxygen-free baking of glass kiln |
| CN116750951B (en) * | 2023-05-29 | 2024-05-10 | 湖北华强日用玻璃有限公司 | Method for oxygen-free baking of glass kiln |
| CN119390325A (en) * | 2024-12-31 | 2025-02-07 | 彩虹显示器件股份有限公司 | A sealing device and method for a molybdenum electrode heating element of a substrate glass kiln |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Shaohong special glass Co.,Ltd. Assignor: CAIHONG GROUP Co.,Ltd. Contract record no.: X2023980042112 Denomination of utility model: A cover plate glass furnace Granted publication date: 20210112 License type: Common License Record date: 20230922 |
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| EE01 | Entry into force of recordation of patent licensing contract |