Forming device for ultra-thin glass

Abstract

The utility model relates to the technical field of ultra-thin glass equipment, and discloses an ultra-thin glass forming device which comprises a muffle furnace, a shaping part, a primary thinning traction roller, a secondary thinning part and an annealing part which are sequentially arranged, and a feeding pipe and an overflow brick are arranged in the muffle furnace; the shaping part comprises a traction roller for guiding a plate, and a first shaping furnace, an edge roller and a first cooling shaping device which are sequentially arranged along the traction roller for guiding the plate; the secondary thinning part comprises a secondary thinning traction roller as well as a secondary thinning heating furnace and a second cooling shaping device which are sequentially arranged along the secondary thinning traction roller; and the annealing part comprises a plurality of annealing furnaces and auxiliary traction rollers arranged among the plurality of annealing furnaces. The temperature and the stress of the glass are adjusted and controlled in the two thinning processes, so that the thickness of the ultrathin glass can be more accurately controlled, the high precision and the uniformity of the thickness are realized, the requirements of different application scenes are met, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-thin glass equipment, in particular to a forming device for ultra-thin glass. Background Art

[0002] With the advent of the folding screen era, ultra-thin (thickness less than 0.1mm) flexible glass substrates are indispensable materials for folding terminal devices. At present, in the process of producing glass plates by the down-draw method, the overflow down-draw method and the slit down-draw method are the most representative. The overflow down-draw method refers to the method in which the molten glass liquid is transported to a forming device with a wedge-shaped cross-section through a discharge pipe, and the glass liquid overflows from both sides of the groove of the forming device, passes through the top of the forming device, and then flows down along the two side walls of the forming device, and merges together at the intersection of the two side walls at the bottom of the forming device to form a glass ribbon, and finally forms a glass plate. At present, the thickness of the glass substrates produced by the overflow down-draw process of the one-time thinning method is greater than or equal to 0.1mm, and the thickness of the glass that can be stably mass-produced is 0.4-0.7mm. With the explosive demand for flexible display screens, the requirements for thinning and lightweight glass are getting higher and higher, and the bending radius and folding radius of the glass are also required to be smaller and smaller, and the glass thickness must be less than 0.1mm.

[0003] CN 103922567 A discloses a manufacturing device for a glass plate. However, this manufacturing device only produces glass by cooperating with an overflow tank and a thinner, and has problems such as inability to produce continuously, poor glass flatness, and low production efficiency.

[0004] Therefore, there is a need in the prior art for improving the ultra-thin glass forming device. Utility Model Content

[0005] In view of this, the purpose of the embodiment of the utility model is to provide an ultra-thin glass forming device to solve the problems of the prior art such as the inability to produce continuously, poor glass flatness and low production efficiency.

[0006] Based on the above purpose, the embodiment of the utility model provides a forming device for ultra-thin glass, the forming device comprises a muffle furnace, a shaping part, a primary thinning roller, a secondary thinning part and an annealing part arranged in sequence, wherein:

[0007] A feed pipe and overflow bricks are provided in the muffle furnace;

[0008] The shaping part includes a traction roller for guiding the plate, and a first shaping furnace, an edge drawing machine and a first cooling shaping device arranged in sequence along a first direction;

[0009] The secondary thinning section includes a secondary thinning traction roller, a secondary thinning heating furnace and a second cooling and shaping device sequentially arranged along the first direction;

[0010] The annealing section includes a plurality of annealing furnaces and a plurality of auxiliary pulling rollers.

[0011] In some embodiments, the shaping section further includes a second shaping furnace, and the second shaping furnace is disposed downstream of the first cooling and shaping device along the first direction.

[0012] In some embodiments, a first annealing furnace, a second annealing furnace and a third annealing furnace are included, the first annealing furnace is arranged downstream of the secondary thinning portion along the first direction, and a plurality of auxiliary pulling rollers are respectively arranged in the second annealing furnace and the third annealing furnace.

[0013] In some embodiments, both the primary and secondary ironing pulling rolls are fused quartz pulling rolls.

[0014] In some embodiments, the edge drawing machine is a vertical edge drawing machine.

[0015] In some embodiments, the overflow brick includes an inlet end and an outlet end, the inlet end is connected to the feed pipe, the outlet end is connected to the shaping part so that the glass solution flows to the shaping part, and a flow regulating groove is formed in the overflow brick.

[0016] In some embodiments, the thickness of the glass ribbon after shaping and edge drawing of the shaping part is in the range of 0.4 to 0.7 mm.

[0017] In some embodiments, the device further includes an integrated control system, which is electrically connected to the first shaping furnace, the edge stretching machine, the first cooling shaping device, the second cooling shaping device, the secondary thinning heating furnace, and multiple annealing furnaces.

[0018] In some embodiments, the device further comprises a display panel connected to the integrated control system to display working information.

[0019] In some embodiments, the secondary thinning pulling roller 41 and the primary thinning pulling roller 30 are configured to operate at different pulling speeds.

[0020] The utility model has at least the following beneficial technical effects:

[0021] The device of the utility model pulls out an ultra-thin flexible glass substrate with a thickness of less than 0.1mm through an overflow pull-down production process, and can ensure the uniform flow of molten glass liquid through a high-temperature overflow method, which is helpful to produce glass with a smoother surface and more uniform thickness. Subsequently, it goes through multiple processes of shaping, primary thinning, secondary thinning, and annealing to continuously produce ultra-thin glass. Through the secondary thinning method, the temperature and stress of the glass are adjusted and controlled during the two thinning processes, so the thickness of the ultra-thin glass can be more accurately controlled, and high precision and uniformity of the thickness can be achieved, meeting the needs of different application scenarios and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of an embodiment of a forming device for ultra-thin glass provided by the utility model;

[0024] Description of reference numerals:

[0025] 10. Muffle furnace; 11. Feed pipe; 12. Overflow brick;

[0026] 20. Shaping section; 21. First shaping furnace; 22. Edge drawing machine; 23. First cooling and shaping device;

[0027] 30. One-time thinning traction roller;

[0028] 40. Secondary thinning section; 41. Secondary thinning traction roller; 42. Secondary thinning heating furnace; 43. Second cooling and shaping device;

[0029] 50. Annealing section; 51. Auxiliary traction roller; 52. First annealing furnace; 53. Second annealing furnace; 54. Third annealing furnace;

[0030] 60. Glass belt. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the directions or positions indicated by terms such as "length", "width", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions or positions shown in the drawings, which are only for the convenience of description and cannot be understood as limitations on the present technical solution.

[0033] The terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions; the terms "first", "second", etc. in the specification and claims of the present utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] In the specification and claims of the utility model and the above-mentioned drawings, when an element is referred to as being "fixed on" or "mounted on" or "disposed on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it may be directly or indirectly connected to the other element.

[0035] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] like Figure 1 The figure shows the ultra-thin glass forming device provided by the utility model, which includes a muffle furnace 10, a shaping part 20, a primary thinning roller 30, a secondary thinning part 40 and an annealing part 50 arranged in sequence, wherein:

[0037] A feed pipe 11 and an overflow brick 12 are provided in the muffle furnace 10;

[0038] The shaping section 20 includes a plate-leading traction roller 25 and a first shaping furnace 21, a side drawing machine 22 and a first cooling shaping device 23 arranged in sequence along a first direction X;

[0039] The secondary thinning section 40 includes a secondary thinning traction roller 41, a secondary thinning heating furnace 42 and a second cooling and shaping device 43 sequentially arranged along the first direction X;

[0040] The annealing part 50 includes a plurality of annealing furnaces and a plurality of auxiliary pulling rollers 51 provided thereon.

[0041] Furthermore, the shaping section also includes a second shaping furnace 24, which is arranged downstream of the first cooling and shaping device 23 along the first direction X. The plate-drawing roller 25 in the second shaping furnace 24 does not pull the glass during normal production. Only when the muffle furnace 10 starts to flow glass or the glass ribbon 60 is broken and then pulled to form the glass ribbon 60, the plate-drawing roller 51 clamps the glass ribbon 60 and pulls it downward.

[0042] Furthermore, the annealing section 50 includes a first annealing furnace 52, a second annealing furnace 53 and a third annealing furnace 54, wherein the first annealing furnace 52 is arranged downstream of the secondary thinning section 40 along the first direction X, and the plurality of auxiliary traction rollers 51 are arranged in the second annealing furnace 53 and the third annealing furnace 54, respectively, or between each annealing furnace. After the secondary thinning traction roller 41 thins the glass ribbon 60 for the second time, the first annealing furnace 52 performs stress relaxation and structural densification on the glass ribbon 60; the glass ribbon 60 is annealed in the second annealing furnace 53, wherein the auxiliary traction roller 51 serves to stabilize the glass ribbon 60; the glass ribbon 60 is stably cooled in the third annealing furnace 54, wherein the auxiliary traction roller 51 between the second annealing furnace 53 and the third annealing furnace 54 also serves to stabilize the glass ribbon 60.

[0043] Furthermore, both the primary thinning traction roller 30 and the secondary thinning traction roller 41 are fused quartz traction rollers. Fused quartz has extremely high heat resistance and corrosion resistance, can work stably for a long time in a high temperature and high humidity environment, is not easy to deform or damage, has a small thermal expansion coefficient, has good thermal shock resistance, can withstand rapid temperature changes, and reduces the risk of deformation and cracking caused by temperature changes, thereby further ensuring the production of ultra-thin glass.

[0044] Furthermore, the edge drawing machine 22 is a vertical edge drawing machine, which adopts a continuous production method and can achieve fast and stable glass drawing, thereby improving production efficiency.

[0045] Furthermore, the overflow brick 12 includes an inlet end and an outlet end. The inlet end is connected to the feed pipe 11, and the outlet end is connected to the shaping part 20 so that the glass solution flows to the shaping part 20. A flow regulating groove is formed in the overflow brick 12. The flow regulating groove can timely adjust the glass solution condition in the overflow device based on the glass production condition to better adapt to the production line.

[0046] Furthermore, the thickness of the glass ribbon 60 after shaping and edge drawing by the shaping part 20 is in the range of 0.4 to 0.7 mm. After shaping and edge drawing, the glass ribbon is initially shaped to facilitate subsequent thinning production.

[0047] Furthermore, the device also includes an integrated control system, which is electrically connected to the first shaping furnace 21, the edge drawing machine 22, the first cooling shaping device 23, the second cooling shaping device 43, the secondary thinning heating furnace 42, and multiple annealing furnaces. Preferably, the device also includes a display panel, which is connected to the integrated control system to display working information. The real-time temperature and processing information of multiple devices are obtained through integrated control and displayed through the display panel, so that the operator can view the production progress in real time.

[0048] Furthermore, the secondary thinning traction roller 41 and the primary thinning traction roller 30 are set to operate at different traction speeds.

[0049] The method for using the ultra-thin glass forming device provided by the utility model is as follows:

[0050] Viscosity 10 4 ~10 5 The molten glass with a poise enters the muffle furnace from the feed pipe. The overflow bricks in the furnace flatten the molten glass into a flat surface and cool it evenly. It flows downward from the tip of the overflow brick and enters the first shaping furnace. The glass plate is cooled in the first shaping furnace to a viscosity of 10 5 ~10 6 After being thinned into a glass ribbon with a thickness of 0.4-0.7mm at the time of poise, the width of the plate is fixed by the edge drawing machine and the plate shape is fixed under the action of the first cooling and shaping device. The plate drawing roller in the second shaping furnace does not draw the glass during normal production. Only when the glass starts to flow in the muffle furnace or the glass ribbon is broken and then drawn to form a glass ribbon, the plate drawing roller clamps the glass ribbon and draws it downward. The first thinning traction roller below thins the glass ribbon for the first time. The viscosity of the glass ribbon thinned for the first time is increased from 10 to 200 μm in the second thinning heating furnace. 10 ~10 11 Poise (poise) temperature rise to viscosity 10 5 ~10 6 Poise, do the second thinning and cool down to a viscosity of 10 under the action of the second cooling and shaping device 8 ~10 9 After the glass ribbon is fixed in the shape of the plate by poise, it enters the first annealing furnace. The secondary thinning traction roller in the first annealing furnace has a speed ratio with the primary thinning traction roller. The glass ribbon in the secondary thinning heating furnace is thinned to a thickness of less than 0.1 mm, and then the stress relaxation and structural densification are carried out in the first annealing furnace. The temperature of the glass ribbon in the first annealing furnace is increased from viscosity 10 9 Poise cools to 10 12 Poise, the secondary thinned glass ribbon is annealed in the second annealing furnace, and the temperature of the glass ribbon is increased from viscosity 10 12 Poise down to 10 17 Poise, the auxiliary traction roller is used to stabilize the shape of the glass ribbon. The annealed glass ribbon is cooled steadily in the third annealing furnace. The temperature is from viscosity 10 17 Poise drops to viscosity greater than 10 20 Poise, and finally formed into ultra-thin glass with a thickness of less than 0.1mm.

[0051] The above are exemplary embodiments disclosed by the present utility model, but it should be noted that various changes and modifications may be made without departing from the scope of the present utility model embodiments disclosed by the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed by the present utility model embodiments may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0052] It should be understood that, as used herein, the singular forms "a", "an" are intended to include the plural forms as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations including one or more of the associated listed items.

[0053] The serial numbers of the embodiments disclosed in the above-mentioned embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0054] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the above embodiments of the present invention, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A forming device for ultra-thin glass, characterized in that: The forming device comprises a muffle furnace (10), a shaping section (20), a primary thinning roller (30), a secondary thinning section (40) and an annealing section (50) which are arranged in sequence, wherein: The muffle furnace (10) is provided with a feed pipe (11) and an overflow brick (12); The shaping section (20) comprises a plate-leading traction roller (25), a first shaping furnace (21), an edge drawing machine (22) and a first cooling shaping device (23) which are sequentially arranged along a first direction; The secondary thinning section (40) comprises a secondary thinning traction roller (41), a secondary thinning heating furnace (42) and a second cooling and shaping device (43) which are sequentially arranged along the first direction; The annealing section (50) includes a plurality of annealing furnaces and a plurality of auxiliary pulling rollers (51).

2. The ultra-thin glass forming device according to claim 1, characterized in that: The shaping section further comprises a second shaping furnace (24), and the second shaping furnace (24) is arranged downstream of the first cooling and shaping device (23) along the first direction.

3. The ultra-thin glass forming device according to claim 1, characterized in that: The annealing section (50) includes a first annealing furnace (52), a second annealing furnace (53) and a third annealing furnace (54), wherein the first annealing furnace (52) is arranged downstream of the secondary thinning section (40) along a first direction, and the plurality of auxiliary pulling rollers (51) are respectively arranged in the second annealing furnace (53) and the third annealing furnace (54).

4. The ultra-thin glass forming device according to claim 1, characterized in that: The primary thinning traction roller (30) and the secondary thinning traction roller (41) are both fused quartz traction rollers.

5. The ultra-thin glass forming device according to claim 1, characterized in that: The edge drawing machine (22) is a vertical edge drawing machine.

6. The ultra-thin glass forming device according to claim 1, characterized in that: The overflow brick (12) comprises an inlet end and an outlet end, the inlet end is connected to the feed pipe (11), and the outlet end is communicated with the shaping portion (20) so that the glass solution flows to the shaping portion (20), and a flow regulating groove is formed in the overflow brick (12).

7. The ultra-thin glass forming device according to claim 1, characterized in that: The thickness of the glass ribbon (60) after shaping and edge drawing of the shaping part (20) is in the range of 0.4 to 0.7 mm.

8. The ultra-thin glass forming device according to claim 1, characterized in that: The device also includes an integrated control system, which is electrically connected to the first shaping furnace (21), the edge stretching machine (22), the first cooling and shaping device (23), the second cooling and shaping device (43), the secondary thinning heating furnace (42), and the multiple annealing furnaces.

9. The ultra-thin glass forming device according to claim 8, characterized in that: The device further comprises a display panel, which is connected to the integrated control system to display working information.

10. The ultra-thin glass forming device according to claim 1, characterized in that: The secondary thinning traction roller (41) and the primary thinning traction roller (30) are set to operate at different traction speeds.

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