CN114394736B - Device and method for controlling bending degree of substrate glass molding - Google Patents
Device and method for controlling bending degree of substrate glass molding Download PDFInfo
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- CN114394736B CN114394736B CN202111567016.7A CN202111567016A CN114394736B CN 114394736 B CN114394736 B CN 114394736B CN 202111567016 A CN202111567016 A CN 202111567016A CN 114394736 B CN114394736 B CN 114394736B
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- 239000011521 glass Substances 0.000 title claims abstract description 159
- 239000000758 substrate Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000000465 moulding Methods 0.000 title claims description 17
- 238000005452 bending Methods 0.000 title claims description 9
- 238000005520 cutting process Methods 0.000 claims abstract description 34
- 238000000137 annealing Methods 0.000 claims abstract description 22
- 238000007496 glass forming Methods 0.000 claims abstract description 9
- 239000005357 flat glass Substances 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 6
- 239000011449 brick Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 241000252254 Catostomidae Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/0235—Re-forming glass sheets by bending involving applying local or additional heating, cooling or insulating means
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/033—Re-forming glass sheets by bending by press-bending between shaping moulds in a continuous way, e.g. roll forming, or press-roll bending
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/0207—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet being in a substantially vertical plane
-
- 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)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses a substrate glass forming curvature control device and a substrate glass forming curvature control method, wherein the substrate glass forming curvature control device comprises a first baffle plate, a second baffle plate and a third baffle plate, the first baffle plate is arranged between a thickness forming area and a stress annealing area of a substrate glass forming device, the second baffle plate is arranged between the stress annealing area and a BOW type control area, and the third baffle plate is arranged between the BOW type control area and a board breaking cutting area; a pressure control device is arranged between the second baffle and the third baffle; the first baffle, the second baffle and the third baffle can be close to or far away from the substrate glass; the side of the chopping board strip of the breaking plate cutting area, which is contacted with the glass, is provided with an arc-shaped surface. The device sets up different regulating part in the different regions of base plate glass forming device, has realized the accurate control to base plate glass shaping crookedness, keeps the stability of glass plate BOW type in the stove. The arc-shaped chopping block strips keep the consistency of the BOW direction of the glass plate. The device reasonable in design, the simple operation.
Description
Technical Field
The invention belongs to the field of substrate glass manufacturing equipment, and relates to a substrate glass forming curvature control device and a substrate glass forming curvature control method.
Background
The glass substrate is an important component of a flat panel display device, and is required to have stable flatness, and to be stable and not deformed during processing and manufacturing. In the forming process of the glass substrate, the glass substrate is subjected to severe uneven temperature change and internal and external temperature difference, so that the glass substrate directly generates large warp deformation, the manufacturing process of the panel is seriously influenced, and the quality fluctuation of the panel of the display device is caused. It was found that TFT warpage can be offset by a certain curved shape of the glass substrate (abbreviated as BOW). That is, the BOW type maintaining a uniform shape during the glass substrate manufacturing process is advantageous for the warpage of the TFT production process.
With the continuous development of liquid crystal display technology, G8.5 and higher generation substrate glass will become mainstream, and product thickness gradually develops from 0.7mm to 0.4mm or even thinner glass, and the panel width is wider and faster, and the requirements of TFT panel on glass surface quality such as stress and warpage are higher and higher. In the substrate glass molding production process, buckling deformation mainly occurs in an annealing cooling section, the glass is in a viscoelastic-to-elastic transition area and is affected by temperature field non-uniformity at the moment, so that BOW type occurs, the glass is completely changed into an elastic state in a cutting area, the size of the BOW type is changed even the bending direction is changed due to pressure cutting, the buckling deformation of the annealing area is directly affected, and fluctuation of production quality is seriously caused, so that the control difficulty of the substrate glass BOW production is increased.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a device and a method for controlling the bending degree of a substrate glass, so as to ensure the consistency and the stability of the BOW direction of a glass plate in a furnace.
The invention is realized by the following technical scheme:
the substrate glass molding curvature control device comprises a first baffle, a second baffle and a third baffle, wherein the first baffle is positioned between a thickness molding area and a stress annealing area of the substrate glass molding device, the second baffle is positioned between the stress annealing area and a BOW type control area, and the third baffle is positioned between the BOW type control area and a board breaking cutting area;
a pressure control device is arranged between the second baffle plate and the third baffle plate;
the first baffle, the second baffle and the third baffle can be close to or far away from the substrate glass;
and one side of the chopping board strip of the breaking-off and cutting area, which is contacted with the glass, is provided with an arc-shaped surface.
Preferably, the first baffle, the second baffle and the third baffle all comprise two parts, and the two parts of any baffle are arranged in a mirror symmetry manner along two sides of the substrate glass transmission channel.
Preferably, a plurality of heating devices are symmetrically arranged between the second baffle plate and the third baffle plate and at two sides of the substrate glass transmission channel.
Preferably, a plurality of pressure control devices are symmetrically arranged on two sides of the transmission channel of the substrate glass.
Preferably, the pressure control device is provided with a pressurizing air inlet device at one side far away from the substrate glass transmission channel.
Preferably, a pressure release device is arranged on one side of the pressure control device, which is far away from the substrate glass transmission channel.
Preferably, the pressure relief device is provided with a pressure monitoring unit.
Preferably, the arc-shaped surface of the cutting board strip is attached to the BOW type of the substrate glass in the area.
A control method for the bending degree of the substrate glass by the substrate glass forming bending degree control device adopts the device and comprises the following steps:
when the glass flows down from the brick tips and merges into the thickness forming area, the first baffle plates arranged on the two sides of the substrate glass transmission channel are synchronously adjusted to enable the first baffle plates to be close to or far away from the substrate glass, so that the temperature of the two sides of the substrate glass is higher than the softening point of the glass;
when the glass enters the stress annealing zone, the second baffles arranged on the two sides of the substrate glass transmission channel are synchronously adjusted to enable the second baffles to be close to or far away from the substrate glass, so that the temperature on the two sides of the substrate glass is between the annealing point and the strain point of the glass;
when the glass enters the BOW type control area, third baffles arranged on two sides of the substrate glass transmission channel are synchronously adjusted to enable the third baffles to be close to or far away from the substrate glass, the temperature of two sides of the substrate glass is controlled, and a pressure control device is adjusted to enable the two sides of the substrate glass to keep constant pressure difference;
when the glass enters the breaking cutting area, the arc-shaped surface of the anvil plate strip is contacted with the substrate glass, so that the curvature control in the forming process of the substrate glass is completed.
Preferably, the heating means is adjusted to maintain a constant pressure differential across the substrate glass as the glass enters the BOW type control zone.
Compared with the prior art, the invention has the following beneficial technical effects:
the utility model provides a base plate glass shaping crookedness controlling means sets up different parts in base plate glass shaping device's different regions, has realized the accurate control to base plate glass shaping crookedness, has guaranteed that the stove interior glass board both sides form invariable pressure differential to keep the stability of stove interior glass board BOW type. And meanwhile, an arc-shaped anvil plate strip is adopted in the outlet cutting area to cut the glass plate, so that shaking of the glass plate during cutting is reduced, and the consistency of the BOW direction of the glass plate is maintained. The device reasonable in design, the simple operation has effectively guaranteed the stability and the uniformity of base plate glass shaping crookedness.
Furthermore, the plurality of heating devices can further control the temperature of the space at two sides of the glass when the glass is in the BOW type control area, so that the ambient pressure at two sides of the glass is fully controlled.
Further, the supercharged air intake device facilitates the pressure rise in the corresponding region.
Further, the pressure relief device facilitates a pressure reduction in the corresponding area.
Further, the pressure monitoring unit is convenient for monitor the pressure of the two sides of the glass, so that the pressure control of the two sides of the glass is more accurate.
Further, the arc-shaped surface of the cutting board strip is attached to the BOW type of the substrate glass in the area, so that the consistency of the substrate glass can be effectively ensured.
The control method of the bending degree of the substrate glass is characterized in that the temperature of two sides of the substrate glass is controlled by sequentially adjusting the first baffle plate, the second baffle plate and the third baffle plate of the control system, and the pressure control device is adjusted to enable the glass to enter a BOW type control area, so that the pressure difference of the two sides of the substrate glass is kept constant. And when the glass enters the breaking plate cutting area, the arc-shaped surface of the anvil plate strip is contacted with the substrate glass. The method effectively ensures the stability and consistency of the substrate glass in the forming process.
Furthermore, the control of the pressure on the two sides of the substrate glass can be realized by adjusting the heating device of the BOW type control area, so that the adjusting method is flexible and changeable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic top cross-sectional view of a BOW type control zone of the present invention;
FIG. 3 is a schematic diagram of a cutting process of the prior art board cutting area;
fig. 4 is a schematic diagram of a cutting process of the board breaking cutting area in the present invention.
Wherein: 1. the device comprises a first baffle, 2, a second baffle, 3, a third baffle, 4, a heating device, 5, a pressure control device, 51, a pressurizing air inlet device, 52, a pressure relief device, 53, pressurizing air, 6, overflow bricks, 71, viscous state glass, 72, a viscoelastic state glass plate, 73, an annealed elastic state glass plate, 74, a cut separation glass plate, 81, a cooling air pipe, 82, cooling air, 83, a high heat conduction box, 9, an annealing area heating device, 101, an anvil bar, 102, an anvil bar, 103, a cutting knife wheel, 11 and a clamping roller wheel in the prior art.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1, a substrate glass molding curvature control device comprises a first baffle 1, a second baffle 2 and a third baffle 3 which are respectively arranged between a thickness molding area and a stress annealing area of the substrate glass molding device, between the stress annealing area and a BOW type control area and between the BOW type control area and a board breaking cutting area; the first baffle 1, the second baffle 2 and the third baffle 3 all comprise two parts, and the two parts of each baffle are arranged in a mirror symmetry manner along two sides of the substrate glass transmission channel.
A plurality of heating devices 4 are symmetrically arranged between the second baffle 2 and the third baffle 3 and at two sides of the substrate glass transmission channel;
a plurality of pressure control devices 5 are symmetrically arranged between the second baffle 2 and the third baffle 3 and on two sides of the transmission channel of the substrate glass; the pressure control device 5 is provided with a pressurizing air inlet device 51 and a pressure relief device 52 on one side far away from the substrate glass transmission channel, and the pressure relief device 52 is provided with a pressure monitoring unit.
The first baffle 1, the second baffle 2 and the third baffle 3 can be close to or far away from the substrate glass;
as shown in fig. 3, the prior art cutting board 101 is linear, and is not completely close to the annealed elastic glass plate 73 due to the BOW shape of the glass plate when the glass plate is close to the annealed elastic glass plate 73, and the cutting wheel 103 presses the annealed elastic glass plate 73, so that the BOW shape of the glass plate changes, and even is transferred upwards to the annealing zone, which directly affects the change of the annealing warp and stress.
As shown in fig. 4, in the present invention, the side of the cutting board strip 102 contacting with the glass in the board breaking and cutting area is provided with an arc surface, preferably, the arc surface of the cutting board strip 102 is completely attached to the BOW type of the substrate glass in the area, and shake or BOW type inversion caused by cutting pressure is not generated during cutting.
The invention relates to a control method for forming bending degree of substrate glass by adopting the control device, which comprises the following steps:
as shown in fig. 1, the substrate glass molding equipment is divided into different areas according to different states of glass, wherein the area a is an overflow area, molten glass, namely viscous glass 71, flows down from two sides of overflow bricks 6 and merges at the brick tip, the area is generally free from change of pressure in the furnace due to good sealing performance of the equipment, and even if pressure change occurs, the overflow state of the viscous glass 71 is not greatly changed. After the glass flows down from the tips and merges, the left and right first shutters 1 are synchronously adjusted to approach the viscoelastic glass plate 72, and the temperatures of the BL and BR regions are observed so as to be equal to or higher than the softening point. After the original thickness of the glass sheet is obtained, the air volume of the cooling air 82 is adjusted according to the distribution of the non-flow direction thickness until the thickness distribution enters the specification.
The region B is a thickness forming region, cooling devices are respectively arranged on two sides of the glass plate, cooling air 82 enters the high-heat-conductivity box 83 through the cooling air pipe 81 to cool down viscous state glass 71, and the flow state of the glass plate is changed to ensure the consistency of the thickness. Because the cooling air 82 is introduced into the furnace in zone B, the pressure in the furnace is generally greater than that in zone C and below, and the cooling air on both sides of the glass sheet is generally maintained at an equal air input, the pressure in the BL and BR regions of the furnace is substantially equal and the shape of the viscous glass 71 is generally unchanged in this region.
The region C is a stress annealing region, the glass sheet is in a viscoelastic state, and the movement of particles in the glass is changed drastically in the process of lowering the viscoelastic state glass sheet 72 from the annealing point to below the strain point until the equilibrium state of the particles is reached, so that the pressure in the furnace in this region is required to ensure a stable state, i.e., the internal pressures of CL and CR are equal and constant. The space environment of independent areas CL and CR is ensured by adjusting the position of the second baffle plate 2 relative to the glass plate, the temperatures of the areas CL and CR are observed, so that the temperatures are between annealing points and strain points, the balance of the environmental pressure at the left side and the right side of the C area in the furnace is ensured, and then the stress distribution state is changed by adjusting the annealing area heating device 9 according to the stress distribution state of the whole plate until the stress distribution enters the specification.
The region D is a BOW type control region, the state of the glass plate in the region is an elastic state, and as the two ends of the annealed elastic state glass plate 73 are clamped and pulled by the clamping roller 11, the clamping roller 11 can ensure the flow direction speed of the glass plate. When the pressure in the furnace changes, namely the pressure in the DL area and the pressure in the DR area are different, the glass plate bends towards the side with small pressure under the action of pressure, namely the BOW changes.
As shown in FIG. 2, by observing the pressure monitoring device in zone D, when the DL measured pressure is greater than the standard value, the elastic glass plate 73 after annealing will change in the BOW type as shown in the drawing when the DL pressure is greater than the DR zone. Can be adjusted by: in the first method, the DL side pressure relief device 52 is regulated to reduce the DL internal pressure; in the second method, the pressure inside DR is increased by the pressure-increasing air inlet device 51 at DR side, namely the pressure-increasing air 53, generally nitrogen or other inert gases, so as to keep the difference between DL and DR constant; in the third method, the DR side heating means 4 is adjusted, which can be controlled independently, and the pressure distribution of the glass sheets on the left and right sides is changed by adjusting the ambient temperature on the left and right sides. In the embodiment, the temperature in the DR side furnace is increased, so that the aim of keeping the pressure difference between DL and DR constant can be fulfilled; in the fourth method, the ambient pressure on the left and right sides in the zone D furnace can be changed by adjusting the gap between the movable plate 43 and the annealed elastic glass plate 73.
The E area is a breaking cutting area, when the annealed elastic state glass plate 73 downwards flows out of the D area and enters the E area to a certain height, the clamping roller 11 is always in a clamping state, the chopping board strip 102 moves and is tightly attached to one side of the annealed elastic state glass plate 73 and keeps synchronous descending with the glass plate, and in the descending process, the cutting knife wheel 103 cuts through the glass plate at a certain speed (a transverse and longitudinal combining speed), and at the moment, the glass plate is tightly attached to the arc chopping board strip, so that shaking and BOW type change cannot be generated. And then the suction disc is used for sucking and completing the plate breaking action, so that the cut separated glass plate 74 is stably separated from the mother plate.
After the scribing operation is completed, the cutting board strips 102 still cling to the cut separation glass plates 74, at the moment, the cut separation glass plates 74 are adsorbed by the suckers and are bent towards one side of the cutting board strips, the board breaking operation is completed, and the cutting board strips 102 return to the original position and perform the next operation after the cut separation glass plates 74 are thoroughly separated from the mother board.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The substrate glass molding curvature control device is characterized by comprising a first baffle (1), a second baffle (2) and a third baffle (3), wherein the first baffle (1) is positioned between a thickness molding area and a stress annealing area of the substrate glass molding device, the second baffle (2) is positioned between the stress annealing area and a BOW type control area, and the third baffle (3) is positioned between the BOW type control area and a board breaking cutting area;
a pressure control device (5) is arranged between the second baffle (2) and the third baffle (3);
the first baffle (1), the second baffle (2) and the third baffle (3) can be close to or far away from the substrate glass;
the side, which is contacted with the glass, of the chopping board strip (102) of the board breaking and cutting area is provided with an arc-shaped surface;
the first baffle (1), the second baffle (2) and the third baffle (3) comprise two parts, and the two parts of any baffle are arranged in mirror symmetry along the two sides of the substrate glass transmission channel;
a plurality of heating devices (4) are symmetrically arranged between the second baffle (2) and the third baffle (3) and at two sides of the substrate glass transmission channel;
a plurality of pressure control devices (5) are symmetrically arranged on two sides of the transmission channel of the substrate glass;
the arc-shaped surface of the cutting board strip is attached to the BOW type base plate glass in the area.
2. A substrate glass molding curvature control device according to claim 1, wherein the pressure control device (5) is provided with a pressurizing air inlet device (51) on a side away from the substrate glass conveying passage.
3. A substrate glass molding curvature control device according to claim 1, wherein the pressure control device (5) is provided with a pressure relief device (52) on a side remote from the substrate glass transfer passage.
4. A substrate glass forming curvature control device according to claim 3, wherein the pressure relief device (52) is provided with a pressure monitoring unit.
5. A method for controlling the molding curvature of a substrate glass by using the substrate glass molding curvature control device according to any one of claims 1 to 4, characterized by comprising the steps of:
when glass flows down from the brick tips and merges into the thickness forming area, the first baffle plates (1) arranged at the two sides of the substrate glass conveying channel are synchronously adjusted, so that the first baffle plates (1) are close to or far away from the substrate glass, and the temperature at the two sides of the substrate glass is higher than the softening point of the glass;
when the glass enters the stress annealing zone, the second baffles (2) arranged at the two sides of the substrate glass transmission channel are synchronously adjusted, so that the second baffles (2) are close to or far away from the substrate glass, and the temperature at the two sides of the substrate glass is between the annealing point and the strain point of the glass;
when the glass enters the BOW type control area, third baffles (3) arranged on two sides of the substrate glass transmission channel are synchronously adjusted, so that the third baffles (3) are close to or far away from the substrate glass, the temperature of the two sides of the substrate glass is controlled, and a pressure control device (5) is adjusted, so that the constant pressure difference is kept on the two sides of the substrate glass;
when the glass enters the breaking cutting area, the arc-shaped surface of the anvil plate strip is contacted with the substrate glass, so that the curvature control in the forming process of the substrate glass is completed.
6. A method of controlling bending of a substrate glass according to claim 5, wherein the heating means (4) is adjusted so that a constant pressure difference is maintained across the substrate glass when the glass enters the BOW-type control zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111567016.7A CN114394736B (en) | 2021-12-20 | 2021-12-20 | Device and method for controlling bending degree of substrate glass molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111567016.7A CN114394736B (en) | 2021-12-20 | 2021-12-20 | Device and method for controlling bending degree of substrate glass molding |
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| Publication Number | Publication Date |
|---|---|
| CN114394736A CN114394736A (en) | 2022-04-26 |
| CN114394736B true CN114394736B (en) | 2023-12-12 |
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| CN202111567016.7A Active CN114394736B (en) | 2021-12-20 | 2021-12-20 | Device and method for controlling bending degree of substrate glass molding |
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| CN103068753A (en) * | 2010-08-23 | 2013-04-24 | 日本电气硝子株式会社 | Method for producing glass plate |
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