CN117383801A - Composite overflow trough for forming glass substrate and glass substrate forming device - Google Patents
Composite overflow trough for forming glass substrate and glass substrate forming device Download PDFInfo
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- CN117383801A CN117383801A CN202311277130.5A CN202311277130A CN117383801A CN 117383801 A CN117383801 A CN 117383801A CN 202311277130 A CN202311277130 A CN 202311277130A CN 117383801 A CN117383801 A CN 117383801A
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- brick body
- glass substrate
- forming
- lower brick
- composite
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- 239000011521 glass Substances 0.000 title claims abstract description 74
- 239000000758 substrate Substances 0.000 title claims abstract description 52
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 239000011449 brick Substances 0.000 claims abstract description 185
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000006060 molten glass Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 101150091203 Acot1 gene Proteins 0.000 claims description 4
- 102100025854 Acyl-coenzyme A thioesterase 1 Human genes 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 8
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 1
- 230000008646 thermal stress Effects 0.000 description 12
- 238000007665 sagging Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 4
- 238000007500 overflow downdraw method Methods 0.000 description 4
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- 238000011900 installation process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- 102100037651 AP-2 complex subunit sigma Human genes 0.000 description 1
- 101000806914 Homo sapiens AP-2 complex subunit sigma Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003280 down draw process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
The application relates to the technical field of glass substrate forming, in particular to a composite overflow trough for forming a glass substrate and a glass substrate forming device; the composite overflow groove for forming the glass substrate comprises an upper brick body, a lower brick body and a plurality of support bulges, wherein the upper brick body is provided with a containing groove for containing glass liquid, and the two sides of the upper brick body are provided with the support bulges; the temperature of the lower brick body is linearly decreased from the top to the bottom; the cavity is arranged in the middle of the lower brick body, a supporting rod penetrates through the cavity, and the supporting rod extends out of two ends of the lower brick body; and the interlocking structure is arranged at the joint of the upper brick body and the lower brick body. The brick feeding device has the advantages that the structure is simple, when the brick feeding device is used for a certain time and then needs to be replaced, only the lower brick body needs to be replaced, and the upper brick body can be used continuously, so that the manufacturing cost of the whole production can be reduced to a certain extent, and meanwhile, the process flow of the disassembly and the installation of the lower brick body is relatively simple, so that the brick feeding device is easy to produce and popularize on a large scale.
Description
Technical Field
The present application relates to the technical field of glass substrate molding, and in particular, to a composite overflow trough for glass substrate molding and a glass substrate molding device.
Background
Glass substrates currently used in TFT-LCD and/or OLED display panels are typically produced using an overflow down-draw process, which was originally developed and used by Corning corporation in the united states.
The overflow down-draw method is mainly characterized in that the overflow groove comprises an upper brick body and a lower brick body, wherein the upper brick body consists of an upper groove wall and a groove bottom, and the control of the quantity of molten glass can be realized by limiting the sizes of the upper groove wall and the groove bottom; the lower brick body is formed by two wedge-shaped sections with downward inclined surfaces; wherein the side walls of the upper and lower bricks form two continuous forming surfaces.
The overflow downdraw method is that molten glass is first led into the upper brick body tank of overflow tank, and when the liquid level of molten glass exceeds the top surface of upper tank wall, the molten glass will flow downwards along two main side surfaces, and then form one integral glass belt in the brick tip of lower brick body, and finally the glass belt is pulled by the drawing roller in forming area to form glass substrate.
Then, in order to ensure that the molten glass can normally flow in the overflow trough, the overflow trough is at a high temperature ranging from 1200 ℃ to 1300 ℃ for a long time, and as the production time is prolonged, the overflow trough is influenced by multiple factors such as self weight, weight for supporting the molten glass, tension transmitted back to the overflow trough in the process of drawing down the glass belt, and the like, the brick body of the overflow trough easily creeps at a high temperature under the high temperature condition, so that the sagging problem of the middle part of the overflow trough is caused, and particularly, the glass substrate of the higher generation is produced at present, and the sagging risk is higher due to the larger span of the overflow trough.
The sagging problem of the overflow trough directly causes uneven thickness and surface of the produced glass substrate, which can seriously affect the quality of the display image of the glass substrate used for TFT-LCD or/and OLED display; in addition, if serious deformation occurs in the overflow groove, the overflow groove can even lead to the breakage of the brick body, thereby causing the production break and affecting the production efficiency.
In addition, in the prior art, when the overflow trough is too large to be normally used due to high-temperature creep deformation in the production process, the whole overflow trough is generally required to be replaced integrally, and the manufacturing cost of the glass substrate is increased when the whole replacement is carried out each time in consideration of high production and processing cost of refractory bricks used for producing the overflow trough. Therefore, there is a need for improvement in view of the problem that the isopipe for use in the production of the above glass substrates is susceptible to sagging during the production process.
Disclosure of Invention
One technical problem to be solved by the present application is: the overflow trough for glass substrate production is easy to have sagging problem in the production process.
In order to solve the above technical problems, an embodiment of the present application provides a composite overflow trough for forming a glass substrate, including: the upper brick body is provided with a containing groove which is used for containing glass liquid, and supporting bulges are arranged on two sides of the upper brick body; the temperature of the lower brick body is linearly decreased from the top to the bottom; the cavity is arranged in the middle of the lower brick body, a supporting rod penetrates through the cavity, and the supporting rod extends out of two ends of the lower brick body; and the interlocking structure is arranged at the joint of the upper brick body and the lower brick body.
In some embodiments, the temperature gradient inside the lower brick body is ΔT,20 ℃ ΔT 80 ℃.
In some embodiments, the support rod has a coefficient of thermal expansion of CTE1 and the lower brick has a coefficient of thermal expansion of CTE2, 2.0X10-6/K. Ltoreq.CTE 1-CTE 2. Ltoreq.4.0X10-6/K.
In some embodiments, the direction of the placement of the cavity is perpendicular to the direction of flow of the molten glass.
In some embodiments, the cavity volume is 20% -50% of the lower brick volume.
In some embodiments, the interlocking structure comprises: the concave table is arranged on one of the upper brick body or the lower brick body; the boss is arranged on the other one of the upper brick body or the lower brick body and is matched with the concave table.
In some embodiments, the upper tile body and the lower tile body are made of the same material.
In some embodiments, the two sides of the receiving groove are provided with groove surfaces, and the groove surfaces are arranged in parallel with the brick tip.
The application also provides a glass substrate forming device, which comprises the composite overflow trough for forming the glass substrate.
In some embodiments, further comprising: the two support pier blocks are symmetrically arranged and are used for bearing the support protrusions; the support block is provided with two support blocks which are symmetrically arranged and used for bearing the support rods.
Through above-mentioned technical scheme, the compound overflow launder that glass substrate takes shape usefulness that this application provided includes: the upper brick body is provided with a containing groove which is used for containing glass liquid, and supporting bulges are arranged on two sides of the upper brick body; the temperature of the lower brick body is linearly decreased from the top to the bottom; the cavity is arranged in the middle of the lower brick body, a supporting rod penetrates through the cavity, and the supporting rod extends out of two ends of the lower brick body; and the interlocking structure is arranged at the joint of the upper brick body and the lower brick body.
Through setting up the holding tank on last brick body, can be with glass liquid splendid attire in the holding tank to utilize the supporting bulge of last brick body both sides to support this last brick body, thereby guarantee the steady support of this last brick body. The upper brick body and the lower brick body are arranged in a split mode, the self weight of the upper brick body and the pressure exerted on the lower brick body by the weight of molten glass contained in the upper brick body in the actual production process can be reduced, the risk of sagging of the middle part of the brick tip of the lower brick body is reduced, and the thickness uniformity of the produced glass substrate is ensured; secondly, utilize the bracing piece to run through the internal cavity of brick down, can utilize this bracing piece to carry out whole support to this brick down, simultaneously, consider in order to guarantee that overflow downdraw method can successfully draw out qualified glass board, need keep certain temperature gradient between the top of brick down to the bottom brick point down, the top of brick down is the change trend that the longitudinal temperature was linear decline to the bottom brick point down promptly, the brick down can produce certain thermal stress, avoid the brick down to receive the influence of thermal stress for a long time, and cause whole brick down surface fracture even inefficacy damage. And moreover, due to the arrangement of the interlocking structure, dislocation sliding is avoided between the upper brick body and the lower brick body, and stable connection of the upper brick body and the lower brick body is ensured.
The composite overflow trough for forming the glass substrate has a simple structure, only needs to replace the lower brick body when the lower brick body is required to be replaced after the glass substrate is used for a certain time, and the upper brick body can be continuously used, so that the manufacturing cost of the whole production can be reduced to a certain extent, and meanwhile, the disassembly and the installation process flow of the lower brick body are relatively simple, so that the glass substrate is easy to produce and popularize on a large scale; therefore, the quality of the display image of the TFT-LCD or/and the glass substrate for OLED display is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a side view of a composite isopipe for shaping a glass substrate as disclosed in the examples herein;
FIG. 2 is a schematic view of a glass substrate forming apparatus according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a split structure of a composite isopipe for shaping a glass substrate according to an embodiment of the present disclosure;
fig. 4 is a schematic view showing the structure of a composite isopipe for molding a glass substrate according to the embodiment of the present application after being assembled.
Reference numerals illustrate:
1. a brick body is arranged; 2. a receiving groove; 3. a supporting protrusion; 4. a brick body is arranged; 5. brick tips; 6. a cavity; 7. a support rod; 8. an interlocking structure; 9. a concave table; 10. a boss; 11. a groove surface; 12. supporting the pier blocks; 13. and supporting the supporting blocks.
Detailed Description
Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and not to limit the scope of the application, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.
These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
In the description of the present application, unless otherwise indicated, the meaning of "plurality" is greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
Furthermore, the terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.
It should also be noted that, in the description of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.
All terms used herein have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
Referring to FIGS. 1-4, there is provided a composite isopipe for forming a glass substrate comprising: the glass brick comprises an upper brick body 1, wherein the upper brick body 1 is provided with a containing groove 2, the containing groove 2 is used for containing glass liquid, and supporting bulges 3 are arranged on two sides of the upper brick body 1; the lower brick body 4, the bottom of the lower brick body 4 is provided with a brick tip 5, and the temperature of the lower brick body 4 is linearly decreased from top to bottom; the cavity 6 is arranged in the middle of the lower brick body 4, a supporting rod 7 penetrates through the cavity 6, and the supporting rod 7 extends out of two ends of the lower brick body 4; and an interlocking structure 8 arranged at the joint of the upper brick body 1 and the lower brick body 4.
Through setting up holding tank 2 on last brick body 1, can be with glass liquid splendid attire in holding tank 2 to utilize the supporting bulge 3 of going up brick body 1 both sides to support this last brick body 1, thereby guarantee the steady support of this last brick body 1. The upper brick body 1 and the lower brick body 4 are arranged in a split mode, the self weight of the upper brick body 1 and the pressure applied to the lower brick body 4 by the weight of molten glass contained in the upper brick body 1 in the actual production process can be reduced, so that the risk of sagging of the middle part of the brick tip 5 of the lower brick body 4 is reduced, and the thickness uniformity of a produced glass substrate is ensured; secondly, utilize bracing piece 7 to run through the cavity 6 in the lower brick body 4, can utilize this bracing piece 7 to carry out whole support to this lower brick body 4, simultaneously, consider in order to guarantee that overflow downdraw method can successfully draw out qualified glass board, need keep certain temperature gradient between the top of lower brick body 4 to the bottom brick point 5, the top of lower brick body 4 is the trend of change that the longitudinal temperature is linear decline to bottom brick point 5 promptly, lower brick body 4 can produce certain thermal stress, avoid lower brick body 4 to receive thermal stress's influence for a long time, and cause whole lower brick body 4 surface fracture even inefficacy damage. And, the setting of interlocking structure 8 avoids producing dislocation slip between the upper brick body 1 and the lower brick body 4, has guaranteed the stable connection of the upper brick body 1 and the lower brick body 4.
The composite overflow trough for forming the glass substrate has a simple structure, only needs to replace the lower brick body 4 when the composite overflow trough is required to be replaced after being used for a certain time, and the upper brick body 1 can be continuously used, so that the manufacturing cost of the whole production can be reduced to a certain extent, and meanwhile, the disassembly and the installation process flow of the lower brick body 4 are relatively simple, so that the composite overflow trough is easy to produce and popularize on a large scale; therefore, the quality of the display image of the TFT-LCD or/and the glass substrate for OLED display is ensured.
When the glass liquid level exceeds the containing groove 2 of the upper brick body 1 in actual use, the glass liquid flows down along the groove surface 11 of the upper brick body 1, flows along the side surface of the lower brick body 4 towards the brick tip 5, forms an integral glass belt at the brick tip 5, and finally pulls the glass belt by the traction roller of the forming area to form a glass substrate.
In some embodiments, the temperature gradient inside the lower brick body 4 is ΔT,20 ℃ ΔT 80 ℃. If the temperature gradient DeltaT is less than 20 ℃, a qualified glass substrate cannot be drawn; considering that the temperature of the lower brick body 4 is raised to be close to the target temperature in the primary temperature raising process, the temperature of the lower brick body 4 is controlled to reach the target temperature curve; if the temperature gradient DeltaT is more than 80 ℃, the process control difficulty is too high, so that the temperature gradient DeltaT is controlled to be 20-80 ℃, and therefore, the temperature gradient of the lower brick body 4 is in the temperature range, the lower brick body 4 generates certain thermal stress, and if the lower brick body 4 is influenced by the thermal stress for a long time, the surface of the whole lower brick body 4 is cracked or even fails and damaged.
In some embodiments, the support rod 7 has a coefficient of thermal expansion of CTE1, the lower brick body 4 has a coefficient of thermal expansion of CTE2, and the control of the coefficient of thermal expansion of the material of the support rod 7 CTE1 and the coefficient of thermal expansion of the material of the lower brick body 4 CTE2 requires that 2.0X10-6/K.ltoreq.CTE 1-CTE 2.ltoreq.4.0X10-6/K; the mismatch force generated by mismatch of the thermal expansion coefficients of the support rod 7 and the lower brick body 4 is used for balancing the thermal stress generated by the existence of the temperature gradient in the lower brick body 4, so that the risk of cracking or even failure and breakage of the lower brick body 4 caused by the thermal stress generated by the existence of the temperature gradient can be effectively reduced.
As shown in table 1, the thermal stress σ1 in table 1 represents the thermal stress generated inside the lower brick body 4, and the mismatch force σ2 represents the mismatch force generated by the mismatch of the thermal expansion coefficients between the support rod 7 and the lower brick body 4.
TABLE 1
As a result of studies, it was found that the lower tile body 4 exhibited a very good service life when |σ1- σ2| was less than or equal to 5MPa, and as can be seen from Table 1, when CTE1-CTE2 <
When 2.0 x 10-6/K or CTE1-CTE2 > 4.0 x 10-6/K, the absolute value of the difference between the thermal stress sigma 1 and the mismatch force sigma 2 is larger than 5MPa, so the CTE1-CTE2 is controlled within the range of 2.0 x 10-6/K-4.0 x 10-6/K.
Thermal stress σ=cte Δt×e, wherein E represents the elastic modulus of the material;
from this formula, the relationship between temperature and thermal expansion coefficient can be deduced as: CTE 1-ct2=0.33×10-7×Δt+1.34×10-7, i.e., there is a positive correlation with respect to the relationship between the temperature gradient and the coefficient of thermal expansion, which approximates a positive linear correlation.
Wherein, the supporting rod 7 can be made of AL 2 O 3 The thermal expansion coefficient of the zircon material is generally about 4.5 x 10 < -6 >/K, AL 2 O 3 The expansion coefficient of the support rod 7 is 7.8x10 < -6 >/K, and the support rod 7 meeting the requirements can be prepared by controlling the component proportion of Al2O3 and zirconite.
In some embodiments, the direction of the placement of the chamber 6 is perpendicular to the flow direction of the molten glass. This mode of setting, in the bracing piece 7 of being convenient for inserts the cavity 6 of lower brick body 4, simultaneously, also avoided the glass liquid in the holding tank 2 to flow into in the cavity 6, and influence bracing piece 7 and the inseparable contact of lower brick body 4.
In some embodiments, the volume of the cavity 6 is 20% -50% of the volume of the lower brick 4. This arrangement avoids influencing the overall strength of the lower brick 4 due to the excessive volume of the cavity 6, ensuring the stability of the lower brick 4.
In some embodiments, the interlocking structure 8 comprises a recess 9 and a projection 10; wherein, the concave table 9 is arranged on the upper brick body 1; the boss 10 is arranged on the lower brick body 4, and the boss 10 is matched with the concave table 9.
The boss 10 is arranged through the concave table 9, so that dislocation sliding between the upper brick body 1 and the lower brick body 4 is avoided, and stable connection of the upper brick body 1 and the lower brick body 4 is ensured. Meanwhile, the concave table 9 and the convex table 10 are simple in structure and convenient to process, and cost required by processing is reduced.
Of course, the concave table 9 can be arranged on the lower brick body 4, the boss 10 is arranged on the upper brick body 1, and the specific arrangement positions of the concave table 9 and the boss 10 can be set according to actual conditions.
In some embodiments, the upper brick body 1 and the lower brick body 4 are made of the same material, so that the whole overflow trough formed by the upper brick body 1 and the lower brick body 4 can be kept, and the same expansion and shrinkage can be kept in the heating process, thereby effectively avoiding the occurrence of inconsistent expansion and shrinkage due to different materials, and further avoiding the occurrence of size mismatch in certain contact boundary areas, and finally causing adverse effects on molten glass forming.
In this embodiment, the upper brick 1 and the lower brick 4 are made of zircon.
In some embodiments, the upper brick 1 comprises a pair of parallel grooved surfaces 11, and a containing tank 2 for containing molten glass; the lower tile body 4 comprises a wedge-shaped cross section formed by two downwardly sloping main surfaces joined at a tile tip 5, the seam of the side walls of the upper tile body 1 and the lower tile body 4 forming two continuous shaped surfaces.
The two sides of the accommodating groove 2 are provided with groove surfaces 11, the groove surfaces 11 are arranged in parallel with the brick tip 5, the arrangement mode is convenient for glass liquid to smoothly pass through the groove surfaces 11, the continuous forming surface and the wedge-shaped section, flow towards the direction of the brick tip 5, then an integral glass belt is formed at the brick tip 5, and finally the glass belt is pulled by a traction roller of a forming area to form a glass substrate.
The control of the molten glass in the accommodating tank 2 can be achieved by determining the tank bottom dimension of the accommodating tank 2.
The invention also provides a glass substrate forming device, which comprises a composite overflow groove for forming the glass substrate, and also comprises a supporting pier block 12 and a supporting bracket block 13; the two support pier blocks 12 are symmetrically arranged, and the support pier blocks 12 are used for bearing the support protrusions 3; the support blocks 13 are provided with two support blocks 13, the two support blocks 13 are symmetrically arranged, and the support blocks 13 are used for bearing the support rods 7.
The support of the support bulge 3 is realized through the support pier block 12, and the support pier block 12 is tightly contacted with the support bulge 3 to realize the support of the upper brick body 1; simultaneously, the support bracket 13 supports the support rod 7, and the support bracket 13 is in close contact with the support rod 7, so that the lower brick body 4 is supported.
The dimensions of the support pier block 12, the support protrusion 3, the support rod 7 and the support bracket 13 can be set according to practical situations.
Thus, various embodiments of the present application have been described in detail. In order to avoid obscuring the concepts of the present application, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.
Claims (10)
1. A composite isopipe for forming a glass substrate comprising:
the glass brick comprises an upper brick body (1), wherein the upper brick body (1) is provided with a containing groove (2), the containing groove (2) is used for containing glass liquid, and supporting bulges (3) are arranged on two sides of the upper brick body (1);
the brick comprises a lower brick body (4), wherein a brick tip (5) is arranged at the bottom of the lower brick body (4), and the temperature of the lower brick body (4) decreases linearly from top to bottom;
the cavity (6) is arranged in the middle of the lower brick body (4), a supporting rod (7) penetrates through the cavity (6), and the supporting rod (7) extends out of two ends of the lower brick body (4); and
and the interlocking structure (8) is arranged at the joint of the upper brick body (1) and the lower brick body (4).
2. The composite overflow trough for forming glass substrates according to claim 1, characterized in that the temperature gradient inside the lower brick body (4) is Δt, Δt being 20 ℃ or more and 80 ℃ or less.
3. The composite overflow trough for forming glass substrates according to claim 1, wherein the support rod (7) has a coefficient of thermal expansion of CTE1, and the lower brick body (4) has a coefficient of thermal expansion of CTE2, 2.0x10 "6/K. Ltoreq.cte 1-CTE 2. Ltoreq.4.0x10" 6/K.
4. A composite isopipe for forming a glass substrate according to any one of claims 1-3, wherein the cavity (6) is disposed in a direction perpendicular to the flow direction of the molten glass.
5. The composite overflow trough for forming glass substrates according to claim 4, characterized in that the volume of the cavity (6) is 20-50% of the volume of the lower brick (4).
6. A composite isopipe for forming a glass substrate as in claim 5 wherein the interlocking structure (8) comprises:
a concave table (9) is arranged on one of the upper brick body (1) or the lower brick body (4);
the boss (10) is arranged on the other one of the upper brick body (1) and the lower brick body (4), and the boss (10) is matched with the concave table (9).
7. The composite overflow trough for forming glass substrates according to claim 1, wherein the upper brick (1) and the lower brick (4) are made of the same material.
8. The composite overflow trough for forming glass substrates according to claim 1, characterized in that trough surfaces (11) are provided on both sides of the receiving trough (2), the trough surfaces (11) being arranged parallel to the brick tips (5).
9. A glass substrate forming apparatus comprising the composite isopipe for forming a glass substrate as defined in any one of claims 1 to 8.
10. The glass substrate forming apparatus according to claim 9, further comprising:
the two support pier blocks (12) are symmetrically arranged, and the support pier blocks (12) are used for bearing the support protrusions (3);
the support blocks (13) are two, the two support blocks (13) are symmetrically arranged, and the support blocks (13) are used for bearing the support rods (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311277130.5A CN117383801A (en) | 2023-09-28 | 2023-09-28 | Composite overflow trough for forming glass substrate and glass substrate forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311277130.5A CN117383801A (en) | 2023-09-28 | 2023-09-28 | Composite overflow trough for forming glass substrate and glass substrate forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117383801A true CN117383801A (en) | 2024-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311277130.5A Withdrawn CN117383801A (en) | 2023-09-28 | 2023-09-28 | Composite overflow trough for forming glass substrate and glass substrate forming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117383801A (en) |
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2023
- 2023-09-28 CN CN202311277130.5A patent/CN117383801A/en not_active Withdrawn
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Application publication date: 20240112 |
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