Device and method for preparing ultrathin flexible glass

Abstract

Disclosed in the present invention are a device and method for preparing ultrathin flexible glass. Firstly, a feeding system, a preheating-heating-annealing furnace body, a side clamping system, a stretching system, a film-applying system, a winding system and a cutting system are provided so as to meet the overall manufacturing of flexible glass. The clamping system clamps two ends of the glass, and the glass is stretched at a discharging end, and is fed at a feeding end, forming continuous stretching with feeding and stretching; the furnace body and a stretching device are horizontally arranged overall, are not limited by the height of a factory building, and high-position operation is avoided; the furnace body of the device spans preheating, heating and annealing, and gradient temperature control in a channel is realized by means of setting the temperature of a heating device, so that the temperature change of the glass is tighter; and the design of grid-shaped temperature measurement points in the furnace body clarifies the temperature points of glass blocks, facilitating temperature adjustment, thus evenly heating the glass, preventing uneven stretching thickness due to uneven heating of the glass or panel explosion caused by uneven cooling and heating, thereby ensuring the utilization rate of glass stretching, especially, improving the utilization rate of a plain panel with an uneven thickness.

Description

Ultra-thin flexible glass preparation device and method Technical Field

[0001] The present invention belongs to the field of ultra-thin flexible glass preparation, and specifically relates to an ultra-thin flexible glass preparation device and method. Background Art

[0002] With the rapid development of the display industry, electronic glass, a key substrate for display products, has become increasingly larger, thinner, and lighter. Flexible glass, which can be rolled and folded like paper, has emerged in this context. While maintaining the inherently stable physical and chemical properties of glass, flexible glass also offers excellent flexibility and high bending strength. Therefore, it holds 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, flexible glass production methods include the float process, overflow process, slot-down draw process, redraw process, and chemical thinning process. While the overflow process produces glass with excellent surface quality, the process involves converging the molten glass at the tip of the overflow brick, creating a base thickness and increasing the difficulty of thinning. The slot-down draw process eliminates the glass base problem, but its materials are limited by precious metals, and its cost remains high. The float process for producing ultra-thin flexible glass requires the addition of a side drawing machine and pulling rollers to overcome the gravity and surface tension of the molten glass; the tin-infiltrated layer formed on the lower surface of the glass requires further processing. The chemical thinning process has limited glass thickness and requires strict microcrack conditions in the substrate. Furthermore, chemical thinning agents such as hydrofluoric acid are highly corrosive and contaminating, placing significant pressure on glass thinning. The redraw process, which involves secondary stretching of the parent material, features a simple principle, low investment, and minimal production space. Compared to other production methods, the redraw process is a suitable and easy-to-use option for flexible glass production research.

[0004] Existing re-drawing technology mostly adopts a vertical pull-down mode, which has high requirements for the height configuration of the factory building, and has problems such as difficulty in feeding and continuous production, uneven thickness or plate bursting caused by uneven heating, low raw material utilization and low output.

[0005] Summary of the Invention

[0006] The present invention provides an ultra-thin flexible glass preparation device and method, which solves the problem of uneven thickness caused by uneven heating during the production of flexible glass.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An ultra-thin flexible glass preparation device includes a preheating and annealing furnace body, wherein a feeding system and a stretching system are respectively provided on both sides of the preheating and annealing furnace body, an edge clamping system is provided between the feed port of the preheating and annealing furnace body and the furnace center, and a coating system, a winding system and a cutting system are sequentially connected to the stretching system;

[0009] The edge clamping system includes a first clamping device and a second clamping device. The first clamping device and the second clamping device are both formed by a layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body. Rollers are set above and below the layer.

[0010] Preferably, the feeding system includes a feeding drive, a feeding end clamping device and a feeding guide rail, wherein 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.

[0011] Preferably, the center position of the preheating annealing furnace body is channel-type connected to the feed end and the discharge end, and an insulation layer and a refractory fiber insulation layer are provided outside the preheating annealing furnace body channel. Insulating panels are provided between the preheating section and the heating section, and between the heating section and the annealing section of the preheating annealing furnace body. The cross-sectional size of the insulating panels in the channel is adjustable, and a furnace body heating device is provided inside the preheating annealing furnace body. The furnace body heating device is divided into two modules: preheating heating and softening heating. The two heating modules respectively have multiple groups of heating wires or heating rods.

[0012] Preferably, a furnace body temperature control device is provided in the preheating heating annealing furnace body, and the furnace body temperature control device includes a programmable PID controller, an ammeter, a voltmeter and a temperature measuring thermocouple, and the temperature measuring thermocouple is distributed in a grid shape above the preheating section, the heating section and the annealing section.

[0013] 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 tension drive. The discharge end clamping device is arranged on the stretching motion guide rail, and the discharge end clamping device is connected to the stretching arm. The tension drive acts on the stretching arm to drive the clamped glass by tension to stretch the glass.

[0014] Preferably, the coating system electrostatically adsorbs a film with a thickness of 0.1-0.5 mm on both surfaces of the glass.

[0015] Preferably, the covering film is selected from polyethylene film, polypropylene film, polyvinyl chloride film or polyester film.

[0016] Preferably, the cutting system comprises a cutting knife, a cutting knife drive and a cutting dust removal device.

[0017] Preferably, the edge clamping system is also connected to an edge cooling device.

[0018] A method for preparing ultra-thin flexible glass comprises: loading a glass sheet into a furnace channel and clamping it by an edge clamping system; preheating the loaded glass in a preheating and annealing furnace; entering a heating zone after the glass reaches the preheating temperature, where the glass is uniformly heated to a stretching temperature and softened; then entering a stretching system for stretching; and after precision annealing, the stretched glass is sent to a coating system for coating. After coating, the glass enters a winding system, enters a packaging system, and then enters a cutting system to complete winding according to a predetermined roll size.

[0019] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides an ultra-thin flexible glass preparation device, which firstly satisfies the overall production of flexible glass by setting 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. Secondly, the clamping system includes a first clamping device and a second clamping device. The first clamping device and the second clamping device are both formed by a pressure strip and a pressure strip support. The pressure strip support is vertically connected to the pressure strip and is placed at the furnace mouth of the preheating and annealing furnace body. Rollers are set above and below the pressure strip. The clamping system clamps both ends of the glass, stretches the glass at the discharge end, and feeds the glass at the feed end, forming a continuous stretching with feeding and stretching. The furnace body and the stretching device are arranged horizontally as a whole, which is not restricted by the height of the factory building and avoids high-position operation.

[0020] Furthermore, the furnace body of the device is divided into preheating, heating and annealing, and gradient temperature control in the channel is achieved by relying on the temperature setting of the heating device, making the temperature change of the glass more compact; the grid-type temperature measuring point design in the furnace body clearly defines the temperature points of the glass blocks, which is convenient for temperature adjustment, so that the glass is heated evenly, avoiding uneven heating of the glass, uneven stretching thickness or uneven hot and cold causing plate explosion, ensuring the utilization rate of glass stretching, especially improving the utilization rate of plain plates with uneven thickness.

[0021] The present invention also provides a method for preparing ultra-thin flexible glass. The entire preparation process is simple, the preparation device is easy to maintain, and the temperature, feed rate, stretching rate, tension, etc. are easy to adjust. It can meet the needs of preparing ultra-thin flexible glass of different thicknesses from a variety of flat glass plates such as alkali-containing high-aluminum silicate, alkali-containing medium-aluminum silicate, and alkali-free silicate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of an apparatus for preparing ultra-thin flexible glass according to the present invention.

[0023] FIG2 is a schematic cross-sectional view of a furnace for preparing ultra-thin flexible glass according to the present invention.

[0024] FIG3 is a cross-sectional view of the edge holding system.

[0025] FIG4 is a diagram showing an embodiment of an edge holding system.

[0026] FIG5 is a diagram showing another embodiment of the edge holding system.

[0027] In the figure, 1-feeding system, 2-preheating annealing furnace body, 3-edge clamping system, 4-stretching 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-discharging end clamping device, 42-stretching motion guide rail, 43-stretching arm, 44-tension drive. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only 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.

[0033] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] In order 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.

[0035] As shown in FIG1 , the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, with a feeding system 1 and a stretching system 4 provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 connected in sequence to the stretching system 4;

[0036] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0037] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0038] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0039] The feeding system 1 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 .

[0040] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0041] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0042] The center position of the preheating annealing furnace body 2 is connected to the feed end and the discharge end in a channel-like manner. An insulation layer and a refractory fiber insulation layer are provided outside the channel of the preheating annealing furnace body 2. Insulating panels are provided between the preheating section and the heating section, and between the heating section and the annealing section of the preheating annealing furnace body 2. The cross-sectional size of the insulating panels in the channel is adjustable. A furnace body heating device 21 is provided in the preheating annealing furnace body 2. The furnace body heating device 21 is divided into two modules: preheating heating and softening heating. The two heating modules respectively have multiple groups of heating wires or heating rods.

[0043] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0044] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0045] The preheating and annealing furnace body 2 is provided 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.

[0046] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0047] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0048] The stretching system 4 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 arranged on the stretching motion guide rail 42, and the discharge end clamping device 41 is connected to the stretching arm 43. The tension drive 44 acts on the stretching arm 43 to drive the clamped glass by tension to stretch the glass.

[0049] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0050] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0051] The coating system 5 electrostatically adsorbs a thin film with a thickness of 0.1-0.5 mm on both surfaces of the glass.

[0052] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0053] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0054] The laminating film can be polyethylene film, polypropylene film, polyvinyl chloride film or polyester film.

[0055] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0056] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0057] The cutting system 7 includes a cutting blade, a cutting blade drive and a cutting and dust removal device.

[0058] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, comprising a preheating and annealing furnace body 2, wherein a feeding system 1 and a stretching system 4 are respectively provided on both sides of the preheating and annealing furnace body 2, an edge clamping system 3 is provided between the feed port of the preheating and annealing furnace body 2 and the furnace center, and a coating system 5, a winding system 6, and a cutting system 7 are sequentially connected to the stretching system 4;

[0059] 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 layer and a layer support. The layer support is vertically connected to the layer and is placed at the furnace mouth of the preheating and annealing furnace body 2. Rollers 33 are set above and below the layer.

[0060] The edge clamping system 3 is also connected to an edge cooling device.

[0061] Another embodiment of the present invention provides an ultra-thin flexible glass preparation device, which includes a feeding system 1, a preheating and annealing furnace body 2, an edge clamping system 3, a stretching system 4, a coating system 5, a winding system 6 and a cutting system 7.

[0062] The feeding system 1 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.

[0063] The preheating and annealing furnace body 2 is a self-contained setting. The center of the furnace body is connected to the feed end and the discharge end in a channel-like manner. An insulation layer and a refractory fiber insulation layer are arranged outside the furnace body channel. Insulation panels are provided between the preheating section and the heating section, and between the heating section and the annealing section. The cross-sectional size of the insulation panels in the channel is adjustable. The furnace body heating device 21 is divided into two modules: preheating and softening heating. The two heating modules are respectively provided with multiple groups of heating wires or heating rods, and the heating state of each group can be adjusted independently. The last group of the softening heating module heats no more than 1 / 2 of the furnace body feed end. The furnace body temperature control device 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-like manner above the preheating section, the heating section, and the annealing section, and can complete grid-type temperature real-time monitoring of the furnace body at different stages to clarify the temperature state of the glass sample when it is in different sections. The PID controller is connected to the grid-type temperature measuring thermocouple 22 and directly displays the corresponding thermocouple temperature measurement results.

[0064] After the furnace body is powered on, the preheating target temperature and softening target temperature are set through the control program, or the target temperature of the independent heating group is set, so that the channel temperature in the furnace gradually increases in the preheating section, is stably maintained in the heating section, and slowly decreases in the annealing section.

[0065] The edge clamping system 3 consists of two parts, upper and lower, both formed by a bead and a bead support, shaped like a clamp. The upper and lower bead enter from the furnace mouth, extend and cross the highest temperature stretching point, and match the glass edge of the heating section. The bead support is vertically connected to the bead, and the upper and lower parts are matched and placed at the furnace mouth to facilitate the adjustment of the bead support position. It also serves as a furnace plug to block the furnace mouth and keep the furnace body warm. Rollers 33 are set above and below the bead, or only the lower bead is set with rollers 33, forming an edge clamping state with upper pressure and lower support transmission. The edge clamping device is also connected to the edge cooling device to shape the edge clamping.

[0066] The stretching system includes a discharge clamping device 41, a stretching motion guide rail 42, a stretching arm 43, and a tension drive 44. The discharge clamping device 41 is attached to the stretching motion guide rail 43 and connected to the stretching arm 43. The tension drive acts on the stretching arm 43 to pull the clamped glass, thereby stretching the glass. The tension is controllable.

[0067] The coating system 5 is arranged below the stretching system 4. The film is electrostatically adsorbed on both surfaces of the glass to complete the coating protection of the flexible glass surface.

[0068] The winding system 6 is connected to the conveying device to roll up the coated glass.

[0069] The cutting system 7 is located on the conveyor track before winding, and includes a cutting blade, a cutting blade drive, and a cutting dust removal device; or laser cutting is used. When the ultra-thin flexible glass is rolled and packaged, the cutting is completed before the roll is rolled.

[0070] There are scales on the feed track and the discharge track to clearly indicate the feed displacement and stretching displacement, making it easy to adjust the feed rate and stretching rate.

[0071] An ultra-thin flexible glass preparation device also includes an online monitoring system that measures the width and thickness changes of the ultra-thin flexible glass in real time through laser or spectral sensing.

[0072] The preheating temperature is 580℃-800℃; the heating and stretching temperature is 700℃-1080℃.

[0073] The feed rate is 10mm / min-60mm / min, and the stretching rate is 300mm / min-1200mm / min.

[0074] The thickness of ultra-thin flexible glass products is 20μm-90μm, with a tolerance of ±2μm.

[0075] The original glass sheet is loaded into the furnace channel, one end of which is clamped by the feeding end clamping device, and the other end is clamped by the discharging end clamping device;

[0076] The present invention also provides a method for preparing ultra-thin flexible glass. The original glass sheet is loaded into the furnace channel, preheated by the furnace body, and sent to the heating zone after reaching the preheating temperature. The glass is evenly heated to the stretching temperature and softened. The tension drives the loading. The softened glass moves along the stretching track under the traction of the tension drive to achieve stretching. After the stretched glass is precisely annealed, it is sent to the coating area for pause, and the coating roller sends the film to the glass surface to complete the coating, and then the roll is rolled up according to the fixed roll size.

[0077] The furnace body of the device is divided into preheating, heating and annealing. The gradient temperature control in the channel is realized by relying on the temperature setting of the heating device, which makes the temperature change of the glass more compact. The grid-type temperature measuring point design in the furnace body clearly defines the temperature points of the glass blocks, which is convenient for temperature adjustment and makes the glass heated evenly. It avoids uneven heating of the glass, uneven stretching thickness or uneven hot and cold causing plate explosion, thus ensuring the utilization rate of the stretched glass, especially improving the utilization rate of the plain plates with uneven thickness.

[0078] The clamping device clamps the two ends of the glass, the glass is stretched at the discharge end and fed at the feed end, forming a continuous stretching process with feeding and stretching; when the stretching is completed, the clamping device at the discharge end is released and returns to the initial position along the track to clamp the glass, forming a reciprocating motion driven by stretching, realizing continuous stretching preparation;

[0079] The edge clamping device is insulated at the furnace mouth of the feeding end to keep the edge of the glass in the stretching section in a pressed state, cool the edge, overcome the surface tension contraction of the glass, and control the reduction of the glass sheet width.

[0080] The furnace body and stretching device are set horizontally as a whole, which is not restricted by the height of the factory building and avoids high-position operation.

[0081] The entire preparation process of the present invention is simple, the preparation device is easy to maintain, and the temperature, feed rate, stretching rate, tension, etc. are easy to adjust. It can meet the needs of preparing various flat glass plates such as alkali-containing high aluminum silicate, alkali-containing medium aluminum silicate, and alkali-free silicate into ultra-thin flexible glass of different thicknesses.

[0082] The parameter settings of Examples 1 to 8 and the parameters of the resulting glass products were obtained according to the above method, as shown in Table 1:

[0083] Table 1 Parameter settings of Examples 1 to 8 and parameters of the obtained glass products

[0084] It should be noted that the preparation method of the glass mother material is not limited and can utilize any preparation method capable of forming flat glass, such as float forming, overflow downdraw, and calendering. Furthermore, this method can be used in conjunction with the preparation of the mother material. For example, the overflow downdraw method can be used to feed the glass formed by the overflow downdraw process into the manufacturing apparatus of the present invention and connect it to the glass mother plate manufacturing process, thereby achieving continuous production of ultra-thin flexible glass.

[0085] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields. The above-mentioned specific embodiments are merely illustrative and instructive, and are not restrictive. A person skilled in the art, guided by the description, may devise various forms without departing from the scope of protection of the claims of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. An ultra-thin flexible glass preparation device, characterized in that: It comprises a preheating annealing furnace body (2), wherein a feeding system (1) and a stretching system (4) are respectively arranged on both sides of the preheating annealing furnace body (2), an edge clamping system (3) is arranged from the feeding port of the preheating annealing furnace body (2) to the furnace, and a coating system (5), a winding system (6) and a cutting system (7) are sequentially connected to the stretching system (4); The edge clamping system (3) comprises a first clamping device (31) and a second clamping device (32), wherein the first clamping device (31) and the second clamping device (32) are both formed by a layering strip and a layering strip support, wherein the layering strip support is vertically connected to the layering strip and is placed at the furnace mouth of the preheating heating annealing furnace body (2), and rollers (33) are arranged above and below the layering strip.

2. The ultra-thin flexible glass preparation device according to claim 1, characterized in that: The feeding system (1) comprises a feeding drive (11), a feeding end clamping device (12) and a feeding guide rail (13), wherein 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 ultra-thin flexible glass preparation device according to claim 1, characterized in that: The center of the preheating annealing furnace body (2) is connected to the feeding end and the discharging end in a channel-like manner; a heat-insulating layer and a refractory fiber heat-insulating layer are arranged outside the channel of the preheating annealing furnace body (2); a heat-insulating plate is arranged between the preheating section and the heating section, and between the heating section and the annealing section of the preheating annealing furnace body (2); the cross-sectional size of the heat-insulating plate in the channel is adjustable; a furnace body heating device (21) is arranged inside the preheating annealing furnace body (2); the furnace body heating device (21) is divided into two modules, namely, a preheating heating module and a softening heating module; and the two heating modules respectively have a plurality of groups of heating wires or heating rods.

4. The ultra-thin flexible glass preparation device according to claim 1, characterized in that: The preheating and heating annealing furnace body (2) is provided with a furnace body temperature control device, which comprises a programmable PID controller, an ammeter, a voltmeter and a temperature measuring thermocouple (22). The temperature measuring thermocouple (22) is distributed in a grid shape above the preheating section, the heating section and the annealing section.

5. The ultra-thin flexible glass preparation device according to claim 1, characterized in that: The stretching system (4) is connected to the annealing port of the preheating annealing furnace body (2), and comprises 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 arranged on the stretching motion guide rail (42), the discharge end clamping device (41) is connected to the stretching arm (43), and the tension drive (44) acts on the stretching arm (43) to drive the clamped glass by tension to stretch the glass.

6. The ultra-thin flexible glass preparation device 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 on both surfaces of the glass.

7. The ultra-thin flexible glass preparation device according to claim 6, characterized in that: The coating film is selected from polyethylene film, polypropylene film, polyvinyl chloride film or polyester film.

8. The ultra-thin flexible glass preparation device according to claim 1, characterized in that: The cutting system (7) comprises a cutting knife, a cutting knife drive and a cutting and dust removal device.

9. The ultra-thin flexible glass preparation device according to claim 1, characterized in that: The edge clamping system (3) is also connected to an edge cooling device.

10. A method for preparing ultra-thin flexible glass, based on the ultra-thin flexible glass preparation device according to any one of claims 1 to 9, characterized in that: include: The original glass sheet is loaded into the furnace channel and clamped 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 to be evenly heated to the stretching temperature and softened. The glass then enters the stretching system (4) for stretching. After the stretched glass is precisely annealed, it is sent to the coating system (5) for coating. After the coating is completed, it enters the winding system (6), enters the packaging, and then enters the cutting system (7) to complete the winding according to the fixed roll size.

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