An ultra-thin flexible glass preparation device and method

Abstract

The application discloses a kind of ultra-thin flexible glass preparation device and method, first by setting feeding system, preheating heating annealing furnace body, edge clamping system, stretching system, film coating system, winding system and cutting system satisfy the overall production of flexible glass, clamping system is clamped at both ends of glass, glass discharge end is stretched, feeding end feeds, forms continuous stretching with sending, furnace body and stretching device are integrally horizontally arranged, not limited by workshop height, avoid high-level operation, device furnace body is divided into preheating, heating, annealing, rely on heating device temperature setting to realize gradient temperature control in passage, make glass temperature change more compact;Furnace body is designed in net format temperature measuring point, clear glass block temperature point, temperature regulation is facilitated, make glass uniform heating, avoid glass unevenly heated and stretch unevenly or unevenly heated and occur board explosion, ensure glass stretching utilization, especially, improve the utilization of uneven thickness of base plate.

Description

Technical Field

[0001] This invention belongs to the field of ultrathin flexible glass preparation, specifically an ultrathin flexible glass preparation apparatus and method. Background Technology

[0002] With the rapid development of the display industry, electronic glass, a key substrate for display products, is becoming increasingly larger and thinner. Flexible glass, which can be rolled and folded like paper, is emerging as a promising material. Flexible glass maintains the stable physicochemical properties of glass while also possessing good flexibility and high bending strength. Therefore, it has broad application prospects in flexible displays, ITO conductive film glass substrates, OLED lighting, and flexible thin-film solar cells, making it one of the most promising materials today and in the future.

[0003] Currently, there are several methods for preparing flexible glass, including float glass, overflow glass, slot-drawing glass, re-drawing glass, and chemical thinning glass. While the overflow glass method produces high-quality glass, the process involves converging the molten glass at the tip of an overflow brick to form a base layer, creating a thickness that increases the difficulty of thinning. Slot-drawing glass eliminates the base layer problem, but its materials are limited by precious metals, resulting in high costs. Float glass production of ultra-thin flexible glass requires additional edge-drawing machines and traction rollers to overcome the gravity and surface tension of the molten glass; the tin-impregnated layer formed on the lower surface of the glass also requires further processing. Chemical thinning glass has limited thickness reduction, strict requirements on the microcrack state of the substrate, and the highly corrosive and polluting nature of chemical thinning agents such as hydrofluoric acid adds invisible pressure to glass thinning. Re-drawing glass involves a secondary stretching of the base material; its principle is simple, and it features low investment and small production space. Compared to other methods, re-drawing glass is a good choice for flexible glass preparation, production, research, and easy application.

[0004] Existing re-drawing technology mostly adopts the vertical downward drawing mode, which has high requirements for plant height configuration, and has problems such as difficulty in feeding materials, difficulty in continuous production, uneven heating leading to uneven thickness or plate breakage, low raw material utilization, and low output. Summary of the Invention

[0005] This invention provides an apparatus and method for preparing ultrathin flexible glass, which solves the problem of uneven thickness caused by uneven heating during flexible glass fabrication.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An ultra-thin flexible glass preparation apparatus includes a preheating and annealing furnace body, a feeding system and a stretching system respectively arranged on both sides of the preheating and annealing furnace body, an edge clamping system arranged from the feeding port of the preheating and annealing furnace body to the furnace center, and a coating system, a winding system and a cutting system connected in sequence to the stretching system. The edge clamping system includes a first clamping device and a second clamping device. Both the first clamping device and the second clamping device are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body. Rollers are arranged above and below the pressure bar.

[0007] Preferably, the feeding system includes a feeding drive, a feeding end clamping device, and a feeding guide rail. The feeding drive is connected to one side of the feeding guide rail, and the feeding end clamping device is located on the feeding guide rail.

[0008] Preferably, the center of the preheating and annealing furnace body is connected to the feed end and the discharge end in a channel-like manner. The preheating and annealing furnace body channel is provided with a heat insulation layer and a refractory fiber insulation layer. A heat insulation plate is provided between the preheating section and the heating section of the preheating and annealing furnace body, and between the heating section and the annealing section. The cross-sectional size of the heat insulation plate in the channel is adjustable. A furnace body heating device is provided inside the preheating and annealing furnace body. The furnace body heating device is divided into two modules: preheating heating and softening heating. Each of the two heating modules has multiple sets of heating wires or heating rods.

[0009] Preferably, the preheating and annealing furnace is equipped with a furnace body temperature control device, which includes a programmable PID controller, an ammeter, a voltmeter, and temperature measuring thermocouples, which are distributed in a grid pattern above the preheating section, the heating section, and the annealing section.

[0010] Preferably, the stretching system is connected to the annealing port of the preheating annealing furnace body and includes a discharge end clamping device, a stretching motion guide rail, a stretching arm, and a stretching drive. The discharge end clamping device is set on the stretching motion guide rail and is connected to the stretching arm. The stretching drive acts on the stretching arm to stretch the glass by pulling it.

[0011] Preferably, the coating system electrostatically adsorbs a thin film with a thickness of 0.1-0.5 mm onto both surfaces of the glass.

[0012] Preferably, the film used for coating is polyethylene film, polypropylene film, polyvinyl chloride film, or polyester film.

[0013] Preferably, the cutting system includes a cutting blade, a cutting blade drive, and a cutting dust removal device.

[0014] Preferably, the edge clamping system is also connected to an edge cooling device.

[0015] A method for preparing ultrathin flexible glass includes: loading a glass sheet into a furnace channel and clamping it with an edge clamping system; preheating the loaded glass in a preheating and annealing furnace; after the glass reaches the preheating temperature, it enters a heating zone to uniformly heat the glass to the stretching temperature to soften it; then the glass enters a stretching system for stretching; after the stretched glass is precision annealed, it is sent to a coating system for coating; after coating, it enters a winding system for packaging; and then enters a cutting system to complete the winding according to a fixed roll size.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an ultra-thin flexible glass manufacturing device. First, by setting up a feeding system, a preheating and annealing furnace body, an edge clamping system, a stretching system, a coating system, a winding system, and a cutting system, the overall production of flexible glass is satisfied. Second, the clamping system includes a first clamping device and a second clamping device. Both the first clamping device and the second clamping device are formed by pressure strips and pressure strip supports. The pressure strip supports are vertically connected to the pressure strips and are placed at the furnace opening of the preheating and annealing furnace body. Rollers are set above and below the pressure strips. The clamping system clamps both ends of the glass. The glass is stretched at the outlet end and fed at the inlet end, forming a continuous stretching with feeding and stretching. The furnace body and the stretching device are set horizontally as a whole, which is not limited by the height of the factory building and avoids high-level operation.

[0017] Furthermore, the furnace body of the device is divided into preheating, heating and annealing stages. The temperature of the heating device is set to achieve gradient temperature control in the channel, making the temperature change of the glass more compact. The grid-type temperature measuring point design inside the furnace body clearly defines the temperature points of the glass blocks, which facilitates temperature adjustment and ensures that the glass is heated evenly. This avoids uneven heating and uneven stretching thickness or uneven heating and cooling that could cause the glass to crack, ensuring the glass stretching utilization rate. In particular, it improves the utilization rate of raw sheets with uneven thickness.

[0018] This invention also provides a method for preparing ultrathin flexible glass. The entire preparation process is simple, the preparation device is easy to maintain, and the temperature, feeding rate, stretching rate, and tension are easy to adjust. It can meet the requirements of preparing various flat glass substrates such as alkali-containing high-alumina silicate, alkali-containing medium-alumina silicate, and alkali-free silicate into ultrathin flexible glass of different thicknesses. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the ultrathin flexible glass preparation device of the present invention.

[0020] Figure 2 This is a simplified cross-sectional view of the furnace body for preparing ultrathin flexible glass according to the present invention.

[0021] Figure 3 This is a cross-sectional view of the edge pressing system.

[0022] Figure 4 This is a diagram of an embodiment of the edge pressing system.

[0023] Figure 5 This is another embodiment of the edge pressing system.

[0024] In the figure, 2-preheating annealing furnace body, 3-edge clamping system, 5-coating system, 6-winding system, 7-cutting system, 11-feeding drive, 12-feeding end clamping device, 13-feeding guide rail, 21-furnace body heating device, 22-temperature measuring thermocouple, 31-first clamping device, 32-second clamping device, 33-roller, 41-discharge end clamping device, 42-tensioning motion guide rail, 43-tensioning arm, 44-tensioning drive. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0033] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0034] The feeding system includes a feeding drive 11, a feeding end clamping device 12, and a feeding guide rail 13. The feeding drive 11 is connected to one side of the feeding guide rail 13, and the feeding end clamping device 12 is located on the feeding guide rail 13.

[0035] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0036] The center of the preheating and annealing furnace body 2 is connected to the feed end and the discharge end in a channel. The preheating and annealing furnace body 2 is provided with a heat insulation layer and a refractory fiber insulation layer outside the channel. There are heat insulation plates between the preheating section and the heating section, and between the heating section and the annealing section of the preheating and annealing furnace body 2. The cross-sectional size of the heat insulation plates in the channel is adjustable. The furnace body heating device 21 is provided inside the preheating and annealing furnace body 2. The furnace body heating device 21 is divided into two modules: preheating heating and softening heating. Each of the two heating modules has multiple sets of heating wires or heating rods.

[0037] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0038] The preheating and annealing furnace body 2 is equipped with a furnace body temperature control device, which includes a programmable PID controller, an ammeter, a voltmeter and a temperature measuring thermocouple 22. The temperature measuring thermocouple 22 is distributed in a grid pattern above the preheating section, the heating section and the annealing section.

[0039] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0040] The stretching system is connected to the annealing port of the preheating annealing furnace body 2, and includes a discharge end clamping device 41, a stretching motion guide rail 42, a stretching arm 43, and a tension drive 44. The discharge end clamping device 41 is set on the stretching motion guide rail 42 and is connected to the stretching arm 43. The tension drive 44 acts on the stretching arm 43 to stretch the glass by pulling it.

[0041] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0042] The coating system 5 electrostatically adsorbs a thin film with a thickness of 0.1-0.5 mm onto both surfaces of the glass.

[0043] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0044] The film used for coating can be polyethylene film, polypropylene film, polyvinyl chloride film, or polyester film.

[0045] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0046] The cutting system 7 includes a cutting blade, a cutting blade drive, and a cutting dust removal device.

[0047] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, including a preheating and annealing furnace body 2, a feeding system and a stretching system respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided from the feeding port of the preheating and annealing furnace body 2 to the furnace center, and a coating system 5, a winding system 6 and a cutting system 7 connected in sequence on the stretching system. The edge clamping system 3 includes a first clamping device 31 and a second clamping device 32. Both the first clamping device 31 and the second clamping device 32 are formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating and annealing furnace body 2. Rollers 33 are arranged above and below the pressure bar.

[0048] The edge clamping system 3 is also connected to an edge cooling device.

[0049] Another embodiment of the present invention provides an ultrathin flexible glass preparation apparatus, which includes a feeding system, a preheating and annealing furnace body 2, an edge clamping system 3, a stretching system, a coating system 5, a winding system 6, and a cutting system 7.

[0050] The feeding system includes a feeding drive 11, a feeding end clamping device 12, and a feeding guide rail 13. It is used for continuous feeding during the preparation of ultra-thin flexible glass.

[0051] The preheating and annealing furnace body 2 is a complete assembly. A channel connects the feed end and discharge end at the center of the furnace body. An insulation layer and a refractory fiber insulation layer are installed outside the furnace body channel. Insulating plates are installed between the preheating section and the heating section, and between the heating section and the annealing section; the cross-sectional size of the insulating plates is adjustable within the channel. The furnace body heating device 21 is divided into two modules: preheating heating and softening heating. Each heating module has multiple sets of heating wires or heating rods, and the heating state of each set can be independently adjusted. The last set of heating in the softening heating module does not exceed 1 / 2 of the furnace body feed end. The furnace body temperature control device includes a programmable PID controller, an ammeter, a voltmeter, and temperature-sensing thermocouples 22. The temperature-sensing thermocouples 22 are distributed in a grid pattern above the preheating section, heating section, and annealing section, enabling real-time grid-like temperature monitoring of different stages of the furnace body to clearly identify the temperature state of the glass sample at different locations. The PID controller is connected to the grid-like temperature-sensing thermocouples 22 and directly displays the corresponding thermocouple temperature measurement results.

[0052] After the furnace power is turned on, the target preheating temperature and softening temperature are set through the control program, or the target temperature of the independent heating group is set, so that the temperature in the furnace channel gradually increases in the preheating section, is kept stable in the heating section, and slowly decreases in the annealing section.

[0053] The edge clamping system 3 consists of two parts, upper and lower, each formed by pressure strips and pressure strip supports, resembling a clamp. The upper and lower pressure strips enter from the furnace opening, extend across the highest temperature stretching point, and align with the edge of the glass in the heating section. The pressure strip support is vertically connected to the pressure strips, with the upper and lower parts aligned and placed at the furnace opening. This facilitates adjustment of the pressure strip support position and also acts as a furnace plug to seal the furnace opening and insulate the furnace body. Rollers 33 are installed on both the upper and lower pressure strips, or only the lower pressure strip has rollers 33, forming an edge clamping state with upper pressure and lower support transmission. The edge clamping device is also connected to an edge cooling device to maintain the shape of the edge clamping.

[0054] The stretching system includes a discharge end clamping device 41, a stretching motion guide rail 42, a stretching arm 43, and a tension drive 44. The discharge end clamping device 41 is connected to the stretching arm 43 on the stretching motion guide rail 42. The tension drive acts on the stretching arm 43 to stretch the glass by pulling it. The magnitude of the tension is controllable.

[0055] The coating system 5 is located below the stretching system. It electrostatically adsorbs the film onto both surfaces of the glass, completing the coating and protection of the flexible glass surface.

[0056] The winding system 6 is connected to the conveying device and rolls up the coated glass.

[0057] The cutting system 7, located on one side of the conveyor track before winding, includes a cutting blade, a cutting blade drive, and a cutting and dust removal device; or it employs laser cutting. The ultra-thin flexible glass is cut before winding after it has been rolled up and packaged.

[0058] The feed track and discharge track are equipped with scales to clearly indicate the feed displacement and stretching displacement, which facilitates the adjustment of the feed rate and stretching rate.

[0059] An ultrathin flexible glass manufacturing apparatus also includes an online monitoring system that measures the width and thickness changes of the ultrathin flexible glass in real time through laser or spectral sensing.

[0060] The preheating temperature is 580℃-800℃; the heating and stretching temperature is 700℃-1080℃.

[0061] The feeding rate is 10mm / min-60mm / min, and the stretching rate is 300mm / min-1200mm / min.

[0062] The thickness of the ultra-thin flexible glass products ranges from 20μm to 90μm, with a tolerance of ±2μm.

[0063] The glass sheet is loaded into the furnace channel, with one end held by the feeding end clamping device and the other end held by the discharging end clamping device; This invention also provides a method for preparing ultrathin flexible glass. The glass sheet is loaded into the furnace channel and preheated in the furnace. After reaching the preheating temperature, it is sent to the heating zone to heat the glass uniformly to the stretching temperature to soften it. A tension drive is applied, and the softened glass moves along the stretching track under the traction of the tension drive to achieve stretching. After the stretched glass is precision annealed, it is sent to the coating area and paused. The coating rollers then attach the film to the glass surface to complete the coating. Finally, the glass is wound up to a fixed roll size.

[0064] The furnace body is divided into preheating, heating, and annealing sections. It relies on the temperature setting of the heating device to achieve gradient temperature control in the channel, making the temperature change of the glass more compact. The grid-type temperature measuring point design inside the furnace body clearly defines the temperature points of the glass blocks, which facilitates temperature adjustment and ensures that the glass is heated evenly. This avoids uneven heating and uneven stretching thickness or uneven heating and cooling that could cause the glass to crack, ensuring the glass stretching utilization rate. In particular, it improves the utilization rate of raw sheets with uneven thickness.

[0065] The clamping device holds both ends of the glass, stretching the glass at the outlet end and feeding it at the inlet end, forming a continuous stretching process with both feeding and stretching. When the stretching reaches its end, the clamping device at the outlet end releases and returns to the initial position along the track to clamp the glass, forming a reciprocating motion driven by stretching, thus realizing continuous stretching preparation. The edge clamping device is kept warm at the furnace opening at the feeding end, keeping the edge of the glass in the stretching section in a pressed state, and cooling the edge to overcome the surface tension of the glass and control the reduction of the glass sheet width.

[0066] The furnace body and stretching device are set horizontally as a whole, which is not limited by the height of the factory building and avoids high-level operation.

[0067] The entire preparation process of this invention is simple, the preparation device is easy to maintain, and the temperature, feeding rate, stretching rate, tension, etc. are easy to adjust. It can meet the requirements of preparing various flat glass substrates such as alkali-containing high aluminosilicate, alkali-containing medium aluminosilicate, and alkali-free silicate into ultra-thin flexible glass of different thicknesses.

[0068] The parameter settings and parameters of the glass products obtained in Examples 1-8 were obtained using the above method, as shown in Table 1: Table 1. Parameter settings and parameters of the resulting glass products for Examples 1-8

[0069] It should be noted that the preparation method of the glass master material is not limited, and can utilize any preparation and forming method capable of forming flat glass, such as float glass forming, overflow drawing, or calendering. Moreover, it can be used in conjunction with the master material preparation. Taking the overflow drawing method as an example, the glass formed by overflow drawing can be further fed into the manufacturing apparatus of this invention, connecting with the glass master sheet manufacturing process to form a continuous ultra-thin flexible glass preparation.

[0070] Although embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments and application fields described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. Those skilled in the art, guided by the specification, can make many other modifications without departing from the scope of the claims of the present invention, and all of these modifications are within the scope of protection of the present invention.

Claims

1. An apparatus for preparing ultrathin flexible glass, characterized in that, The furnace includes a preheating and annealing furnace body (2), on which a feeding system and a stretching system are respectively provided on both sides. The feeding system, the preheating and annealing furnace body (2) and the stretching system are arranged horizontally as a whole. An edge clamping system (3) is provided from the feeding port of the preheating and annealing furnace body (2) to the center of the furnace. A film coating system (5), a winding system (6) and a cutting system (7) are connected in sequence on the stretching system. The edge clamping system (3) includes a first clamping device (31) and a second clamping device (32). The first clamping device (31) and the second clamping device (32) are both formed by a pressure bar and a pressure bar support. The pressure bar support is vertically connected to the pressure bar and is placed at the furnace opening of the preheating annealing furnace body (2). Rollers (33) are set on the upper and lower parts of the pressure bar. The stretching system is connected to the annealing port of the preheating annealing furnace body (2) and includes a discharge end clamping device (41), a stretching motion guide rail (42), a stretching arm (43) and a tension drive (44). The discharge end clamping device (41) is set on the stretching motion guide rail (42). The discharge end clamping device (41) is connected to the stretching arm (43). The tension drive (44) acts on the stretching arm (43) to stretch the glass by pulling it.

2. The ultrathin flexible glass preparation apparatus according to claim 1, characterized in that, The feeding system includes a feeding drive (11), a feeding end clamping device (12), and a feeding guide rail (13). The feeding drive (11) is connected to one side of the feeding guide rail (13), and the feeding end clamping device (12) is located on the feeding guide rail (13).

3. The ultrathin flexible glass preparation apparatus according to claim 1, characterized in that, The center of the preheating and annealing furnace body (2) is connected to the feed end and the discharge end in a channel. The preheating and annealing furnace body (2) is provided with a heat insulation layer and a refractory fiber insulation layer outside the channel. The preheating section and the heating section of the preheating and annealing furnace body (2) are provided with heat insulation panels. The cross-sectional size of the heat insulation panels in the channel is adjustable. The furnace body heating device (21) is provided inside the preheating and annealing furnace body (2). The furnace body heating device (21) is divided into two modules: preheating heating and softening heating. Each heating module has multiple sets of heating wires or heating rods.

4. The ultrathin flexible glass preparation apparatus according to claim 1, characterized in that, The preheating and annealing furnace body (2) is equipped with a furnace body temperature control device, which includes a programmable PID controller, an ammeter, a voltmeter and a temperature measuring thermocouple (22). The temperature measuring thermocouple (22) is distributed in a grid pattern above the preheating section, the heating section and the annealing section.

5. The ultrathin flexible glass preparation apparatus according to claim 1, characterized in that, The coating system (5) electrostatically adsorbs a thin film with a thickness of 0.1-0.5 mm onto both surfaces of the glass.

6. The ultrathin flexible glass preparation apparatus according to claim 5, characterized in that, The coating can be made of polyethylene film, polypropylene film, polyvinyl chloride film, or polyester film.

7. The ultrathin flexible glass preparation apparatus according to claim 1, characterized in that, The cutting system (7) includes a cutting blade, a cutting blade drive, and a cutting dust removal device.

8. The ultrathin flexible glass preparation apparatus according to claim 1, characterized in that, The edge clamping system (3) is also connected to an edge cooling device.

9. A method for preparing ultrathin flexible glass, based on the ultrathin flexible glass preparation apparatus according to any one of claims 1-8, characterized in that, include: The glass sheet is loaded into the furnace channel and held by the edge clamping system (3). The loaded glass is preheated in the preheating and annealing furnace (2). After the glass reaches the preheating temperature, it enters the heating zone and is heated evenly to the stretching temperature to soften. Then the glass enters the stretching system for stretching. After the stretched glass is precision annealed, it is sent to the coating system (5) for coating. After the coating is completed, it enters the winding system (6) for packaging and then enters the cutting system (7) to complete the winding according to the fixed roll size.

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