Apparatus and method for manufacturing ultrathin flexible glass

Abstract

To provide an apparatus and method for manufacturing ultrathin flexible glass that can solve the problem of uneven thickness caused by uneven heating, without being limited in the height of a factory building.SOLUTION: Installation of a supply system, a preheating heating annealing furnace body 2, an end clamp system 3, a stretch system, a coating system 5, a rewinding system 6 and a cutting system 7 satisfies the overall requirements for manufacturing flexible glass. The clamp system 3 clamps both ends of a piece of glass, stretches the discharge end of the glass and supplies a material from a supply end, forming sending and continuous stretch. A furnace main body and a stretch device are horizontally installed as a whole, avoiding work at height without being limited in the height of a factory building. The utility factor of a plate having an uneven thickness can be improved in particular.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention belongs to the field of manufacturing ultra-thin flexible glass, and specifically relates to an apparatus and method for manufacturing ultra-thin flexible glass.

Background Art

[0002] With the rapid development of the display industry, electronic glass, which is the main substrate of display products, has been continuously growing in size and becoming lighter, and flexible glass that can be "rolled" and "folded" like paper has emerged. Flexible glass has the original stable physical and chemical properties of glass, high flexibility, and strong bending strength. Therefore, it is expected to have a wide range of applications in fields such as flexible displays, ITO conductive film glass substrates, OLED lighting, and flexible thin-film solar cells, and it has become one of the most promising materials at present and in the future.

[0003] Currently, the manufacturing methods of flexible glass include the float method, the overflow method, the slit down-draw method, the redraw method, the chemical thinning method, etc. The overflow method has excellent surface quality of the glass, but in this method, the glass liquid gathers at the tip of the overflow brick to form a slab root, so there is a basic thickness, and the difficulty of thinning becomes high. The slit down-draw method solves the problem of the glass slab root, but the materials are limited to precious metals and the cost is still high. To produce ultra-thin flexible glass by the float method, it is necessary to add an edging machine and traction rolls to overcome the gravity and surface tension of the glass liquid. The tin penetration layer formed on the lower surface of the glass requires further processing. In the chemical thinning method, there is a limit to the thinning of the glass, and the requirements for fine cracks in the substrate are strict. Moreover, chemical thinning agents such as hydrofluoric acid are highly corrosive and may apply unexpected pressure to the thinning of the glass. The redraw method is a secondary expansion of the base material, with features such as a simple principle, low investment, and a small manufacturing space. It is an option that can be easily started in the manufacturing research and implementation of flexible glass compared with other manufacturing methods.

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional redraw method, in many cases, the vertical down-draw mode is used. In this mode, the requirements for the height of the factory building are high, the supply of materials is difficult, continuous production is difficult, the thickness may become uneven due to non-uniform heating, or the plate may crack. There are problems such as low utilization rate of raw materials and low productivity.

Means for Solving the Problems

[0005] The present invention discloses a manufacturing apparatus and method for ultra-thin flexible glass, and aims to solve the problem of thickness non-uniformity caused by non-uniform heating in the manufacturing process of flexible glass.

[0006] In order to achieve the above object, the present invention adopts the following technical means. The present invention includes a preheating annealing furnace body (2), and a supply system (1) and a stretch system (4) are respectively provided on both sides of the preheating annealing furnace body (2). An end clamping system (3) is arranged from the supply end of the preheating annealing furnace body (2) into the furnace. A coating system (5), a rewinding system (6) and a cutting system (7) are sequentially connected to the stretch system (4). The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is arranged at the furnace mouth of the preheating annealing furnace body (2). Rollers (33) are provided above and below the laminated bar. An ultra-thin flexible glass manufacturing apparatus is disclosed.

[0007] Furthermore, the supply system (1) includes a supply driving device (11), a supply end clamping device (12) and a supply guide rail (13). The supply driving device (11) is connected to one side of the supply guide rail (13), and the supply end clamping device (12) is arranged on the supply guide rail (13).

[0008] Furthermore, the center of the preheating annealing furnace body (2) connects the supply end and the discharge end in a channel shape. An insulating layer and a refractory fiber insulating layer are provided outside the channel of the preheating annealing furnace body (2). Heat insulating plywood is provided between the preheating part and the heating part of the preheating annealing furnace body (2), and between the heating part and the annealing part. The cross-sectional size of the heat insulating plywood 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 of preheating and softening heating, and each heating module has a plurality of groups of heating wires or heating rods respectively.

[0009] Furthermore, a furnace body temperature control device is provided in the preheating annealing furnace body (2). The furnace body temperature control device includes a programmable PID control device, an ammeter, a voltmeter and a thermocouple (22) for temperature measurement. The thermocouple (22) for temperature measurement is arranged in a mesh shape above the preheating part, the heating part and the annealing part.

[0010] Furthermore, the stretching system (4) is connected to the annealing port of the preheating annealing furnace body (2). The stretching system (4) includes a discharge end clamping device (41), a stretching operation guide rail (42), a stretching arm (43) and a tension driving device (44). The discharge end clamping device (41) is arranged on the stretching operation guide rail (42). The discharge end clamping device (41) is connected to the stretching arm (43). The tension driving device (44) acts on the stretching arm (43) to stretch the clamped glass with a tensile force.

[0011] Furthermore, the coating system (5) attaches a coating film with a thickness of 0.1 to 0.5 mm to both sides of the glass by electrostatic adsorption.

[0012] Furthermore, the coating film used for the coating is selected from a polyethylene film, a polypropylene film, a polyvinyl chloride film, or a polyester film.

[0013] Furthermore, the cutting system (7) includes a cutting blade, a cutting blade driving device, and a cutting dust removal device.

[0014] Furthermore, an end cooling device is further connected to the end clamping system (3).

[0015] In addition, the present invention is a method for manufacturing an ultra-thin flexible glass based on the above ultra-thin flexible glass manufacturing apparatus, comprising transporting a glass substrate into the channel of a furnace body, clamping it by an end clamping system (3), preheating the transported glass in a preheating annealing furnace body (2), after the glass reaches the preheating temperature, allowing it to enter a heating zone, uniformly heating the glass to soften it at a stretching temperature, then feeding the glass into a stretching system (4) for stretching, precisely annealing the stretched glass, then sending it to a coating system (5) for coating, after the coating is completed, feeding it into a rewinding system (6) for rewinding, and completing the rewinding in a cutting system (7) according to a predetermined rewinding size. A method for manufacturing an ultra-thin flexible glass is disclosed.

Effects of the Invention

[0016] The present invention has the following beneficial effects. The present invention provides a manufacturing apparatus for ultra-thin flexible glass. By installing a supply system, a preheating annealing furnace body, an end clamping system, a stretching system, a coating system, a rewinding system, and a cutting system, the overall manufacturing of flexible glass is realized. Further, the clamping system includes a first clamping device and a second clamping device. The first clamping device and the second clamping device are each composed of a stacking bar and a stacking support. The stacking support is vertically connected to the stacking bar and is arranged at the furnace mouth portion of the preheating annealing furnace body. Rollers are installed above and below the stacking bar. The clamping system clamps both ends of the glass, the outlet side of the glass is stretched, and the inlet side is supplied, forming a continuous stretch. The furnace body and the stretching device are horizontally arranged as a whole, not restricted by the height of the factory, and high-position operation can be avoided.

[0017] Furthermore, the furnace body of the apparatus is separately configured for preheating, heating, and annealing. By setting the temperature of the heating device, the temperature is controlled step by step in the channel. Thereby, the temperature change of the glass becomes more uniform. With the grid-like temperature measurement point design in the furnace body, the temperature of each block of the glass can be clearly grasped, and temperature adjustment becomes easy. Thereby, the glass is heated evenly, preventing thickness non-uniformity of stretching due to non-uniform heating of the glass and plate cracking due to thermal non-uniformity, and ensuring the stretching efficiency of the glass. In particular, the utilization rate of a raw plate with non-uniform thickness can be improved.

[0018] Also, the manufacturing method of the ultra-thin flexible glass according to the present invention has a simple manufacturing process, easy maintenance of the manufacturing apparatus, and simple adjustment of temperature, supply speed, stretching speed, tensile force, etc. Thereby, it becomes possible to process various flat glass raw plates such as high-aluminum silicate, low-aluminum silicate, and non-alkali silicate into ultra-thin flexible glass of different thicknesses.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0020] In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, hereinafter, with reference to the drawings of the embodiments of the present invention, the technical solutions thereof will be clearly and completely described. It is obvious that the embodiments described here are part of the present invention and do not cover all embodiments. Usually, the components of the embodiments of the present invention described and illustrated here can be arranged and designed in various different configurations.

[0021] Therefore, the detailed description of the embodiments of the present invention shown in the following drawings does not limit the scope of the present invention protected by the claims, but merely shows selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments that can be obtained by those of ordinary skill in the art without creative efforts are included in the protection scope of the present invention.

[0022] In the following drawings, similar reference numerals and characters indicate similar items. Therefore, once an item is defined in one drawing, there is no need to further define or explain that item in subsequent drawings.

[0023] In the description of the embodiments of the present invention, when terms such as "upper", "lower", "horizontal", "inner" are used to indicate the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually arranged when in use. This is only for the purpose of simplifying the description of the present invention and does not imply or suggest that the indicated device or element has a specific orientation, specific structure, and operation. Therefore, it should not be construed as a limitation of the present invention. Also, terms such as "first", "second", etc. are only used for the purpose of distinguishing the description and do not imply or suggest relative importance.

[0024] Furthermore, when the term "horizontal" is used, it does not require that the part be absolutely horizontal, but means that it may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that its structure needs to be completely horizontal and may be slightly inclined.

[0025] In the description of the embodiments of the present invention, it should be further noted that, unless otherwise clearly defined or limited, terms such as "installation", "attachment", "connection", "coupling", etc. should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and the two elements may communicate with each other inside. A person skilled in the art can understand what these terms specifically mean in the present invention according to the specific situation.

[0026] In order for those skilled in the art to better understand the technical proposal of the present invention, the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0027] As shown in FIG. 1, the ultra-thin flexible glass manufacturing apparatus according to the present invention includes a preheating annealing furnace body 2, a supply system 1 and a stretch system 4 are respectively provided on both sides of the preheating annealing furnace body 2, and an end clamping system 3 is provided in the furnace (or over) from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretch system 4.

[0028] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is disposed at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0029] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace body 2, a supply system 1 and a stretch system 4 are respectively provided on both sides of the preheating annealing furnace body 2, and an end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretch system 4.

[0030] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is disposed at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0031] The supply system 1 includes a supply driving device 11, a supply end clamping device 12 and a supply guide rail 13. The supply driving device 11 is connected to one side of the supply guide rail 13, and the supply end clamping device 12 is disposed on the supply guide rail 13.

[0032] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace main body 2. A supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace main body 2. An end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace main body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0033] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is disposed at the furnace mouth portion of the preheating annealing furnace main body 2. Rollers 33 are installed above and below the laminated bar.

[0034] The central portion of the preheating annealing furnace main body 2 is of a channel type connecting the supply end and the discharge end. A heat insulation layer and a refractory fiber insulation layer are installed outside the channel of the preheating annealing furnace main body 2. Heat insulation plywood is provided between the preheating section and the heating section of the preheating annealing furnace main body 2, and between the heating section and the annealing section. The cross-sectional size of the heat insulation plywood in the channel is adjustable. A furnace body heating device 21 is installed in the preheating annealing furnace main body 2. This furnace body heating device 21 is divided into two modules of preheating and softening heating. Each heating module is respectively provided with a plurality of groups of heating wires or heating rods.

[0035] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace main body 2. A supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace main body 2. An end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace main body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0036] The end 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 laminated bar and a laminated support. The laminated support is connected perpendicularly to the laminated bar and is arranged at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0037] A furnace body temperature control device is installed in the preheating annealing furnace body 2. The furnace body temperature control device includes a programmable PID control device, an ammeter, a voltmeter, and a thermocouple 22 for temperature measurement. The thermocouple 22 is arranged in a net shape above the preheating section, the heating section, and the annealing section.

[0038] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace body 2. A supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace body 2. An end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0039] The end 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 laminated bar and a laminated support. The laminated support is connected perpendicularly to the laminated bar and is arranged at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0040] The stretching system 4 is connected to the annealing port of the preheating annealing furnace body 2. The stretching system 4 includes a discharge end clamping device 41, a stretching operation guide rail 42, a stretching arm 43, and a tensile force driving device 44. The discharge end clamping device 41 is arranged on the stretching operation guide rail 42. The discharge end clamping device 41 is connected to the stretching arm 43. The tensile force driving device 44 acts on the stretching arm 43 to stretch the clamped glass with a pulling force.

[0041] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace body 2, a supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace body 2, and an end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0042] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is arranged at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0043] The coating system 5 adsorbs a film (coating film) with a thickness of 0.1 to 0.5 mm on both sides of the glass by electrostatic adsorption.

[0044] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace body 2, a supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace body 2, and an end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0045] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is arranged at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0046] The film used for the coating is selected from a polyethylene film, a polypropylene film, a polyvinyl chloride film, or a polyester film.

[0047] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace body 2, a supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace body 2, and an end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0048] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is disposed at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0049] The cutting system 7 includes a cutting blade, a cutting blade driving device, and a cutting dust removal device.

[0050] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a preheating annealing furnace body 2, a supply system 1 and a stretching system 4 are respectively provided on both sides of the preheating annealing furnace body 2, and an end clamping system 3 is provided in the furnace from the supply end of the preheating annealing furnace body 2. A coating system 5, a rewinding system 6, and a cutting system 7 are sequentially connected to the stretching system 4.

[0051] The end 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 laminated bar and a laminated support. The laminated support is vertically connected to the laminated bar and is disposed at the furnace mouth portion of the preheating annealing furnace body 2. Rollers 33 are installed above and below the laminated bar.

[0052] An end cooling device is further connected to the end clamping system 3.

[0053] The ultra-thin flexible glass manufacturing apparatus according to another embodiment of the present invention includes a supply system 1, a preheating annealing furnace body 2, an end clamping system 3, a stretching system 4, a coating system 5, a rewinding system 6, and a cutting system 7.

[0054] The supply system 1 includes a supply driving device 11, a supply end clamping device 12, and a supply guide rail 13. It is used for continuous supply in the manufacturing process of ultra-thin flexible glass.

[0055] The preheating annealing furnace body 2 is integrally installed. The central part of the furnace body is of a channel type with the supply end and the discharge end connected. An insulating layer and a refractory fiber insulating layer are installed outside the channel of the furnace body. Heat insulation plywood is provided between the preheating part and the heating part, and between the heating part and the annealing part, and the cross-sectional size of the heat insulation plywood in the channel is adjustable. The furnace body heating device 21 is divided into two modules of preheating and softening heating. A plurality of groups of heating wires or heating rods are arranged in each heating module, and the heating state of each group can be independently adjusted. The heating of the last group of the softening heating module does not exceed the position of 1 / 2 of the supply end of the furnace body. The furnace body temperature control device includes a programmable PID control device, an ammeter, a voltmeter, and a thermocouple 22 for temperature measurement. The thermocouple 22 for temperature measurement is arranged in a mesh shape above the preheating part, the heating part, and the annealing part. In each stage of the furnace body, real-time mesh temperature monitoring is possible. Thereby, the temperature state when the glass sample is at different positions can be clearly grasped. The PID control device is connected to the mesh-shaped thermocouple 22 for temperature measurement and directly displays the temperature measurement result of the corresponding thermocouple.

[0056] When the power supply of the furnace body is connected, the preheating target temperature and the softening target temperature can be set through the control program, or the target temperature of an independent heating group can be set, so that the temperature of the furnace channel gradually increases in the preheating section, is kept stable in the heating section, and gradually decreases in the annealing section, forming a gradient distribution.

[0057] The edge clamping system 3 is composed of upper and lower parts, both of which are formed by lamination bars and lamination supports, and has a clip shape. The upper and lower lamination bars enter from the furnace mouth, extend beyond the highest temperature extension point, and match the edge of the glass in the heating section. The lamination supports are connected vertically to the lamination bars, and the upper and lower parts are matched and installed at the furnace mouth, making it easy to adjust the position of the lamination supports, and also closing the furnace mouth to ensure the insulation of the furnace body. Rollers 33 are installed above and below the lamination bars, or rollers 33 are installed only on the lower lamination bar, forming an edge clamp in a transmission state where the upper part presses and the lower part supports. The edge clamping device is further connected to an edge cooling device to form the edge.

[0058] The stretching system includes a discharge end clamping device 41, a stretching motion guide rail 42, a stretching arm 43, and a tensioning drive device 44. The discharge end clamping device 41 is installed on the stretching motion guide rail 42 and connected to the stretching arm 43. The tensioning drive device acts on the stretching arm 43 to stretch the glass with a tensioning force. The tensioning force is controllable.

[0059] The coating system 5 is disposed below the stretching system 4, and performs coating by electrostatically attaching coating films to both sides of the glass, covering and protecting the surface of the flexible glass.

[0060] The rewinding system 6 is connected to the conveying device and winds up the coated glass.

[0061] The cutting system 7 is arranged on one side of the conveying track before rewinding, and includes a cutting blade, a cutting blade driving device, and a cutting dust removal device. Or laser cutting can also be used. Before the ultra-thin flexible glass is wound up, the rewinding dimension is determined and cutting is performed.

[0062] Measurers are installed on the supply track and the discharge track, clearly showing the moving amount of the supply and the moving amount of the stretch, and the supply speed and the stretch speed can be easily adjusted.

[0063] The ultra-thin flexible glass manufacturing apparatus according to the present invention includes an on-line monitoring system. This system can measure the changes in the width and thickness of the ultra-thin flexible glass in real time using a laser or an optical spectrum sensor.

[0064] The preheating temperature is from 580°C to 800°C, and the heating stretch temperature is from 700°C to 1080°C.

[0065] The supply speed is from 10 mm / min to 60 mm / min, and the stretch speed is from 300 mm / min to 1200 mm / min.

[0066] The thickness of the ultra-thin flexible glass product is from 20 μm to 90 μm, and the allowable error is ±2 μm.

[0067] The glass original plate is carried into the furnace body channel, one end is clamped by the supply end clamping device, and the other end is clamped by the discharge end clamping device.

[0068] Also disclosed is a method for manufacturing an ultra-thin flexible glass according to the present invention. In this method, a glass substrate is carried into a furnace body channel, preheated in the furnace body, and after reaching the preheating temperature, it is sent to a heating zone. The glass is evenly heated and softened at the stretching temperature. Under the load of tension drive, the softened glass is driven by the traction force of tension drive and moves together with the track to realize stretching. The stretched glass is precisely annealed, sent to a coating area, and a coating roller attaches a film to the glass surface to complete the coating, and it is wound up according to the rewinding dimension.

[0069] The furnace body of the device is divided across preheating, heating, and annealing, and the temperature inside the channel can be controlled step by step according to the temperature setting of the heating device, which can make the temperature change of the glass clearer. Mesh-shaped temperature measurement points are designed inside the furnace body, which can clarify the temperature of each section of the glass and facilitate temperature adjustment. Thereby, the glass is evenly heated, preventing non-uniform stretch thickness due to non-uniform heating and breakage due to thermal non-uniformity, and ensuring the stretch utilization rate of the glass. In particular, the utilization rate of a raw plate with non-uniform thickness can be improved.

[0070] The clamping device clamps both ends of the glass, stretches the discharge end of the glass, supplies the glass from the supply end, and forms a continuous stretch of feeding and stretching. When the stretch reaches the end, the clamping device at the discharge end is released, returns to the initial position along the track (truck), clamps the glass again, and forms a reciprocating motion of stretch drive to realize continuous stretch manufacturing.

[0071] The end clamping device insulates heat at the furnace mouth at the supply end, holds the end of the glass in the stretch part in a pressed state, cools the end to overcome the shrinkage due to the surface tension of the glass, and controls the reduction of the width of the glass plate.

[0072] The furnace body and the stretch device are installed horizontally as a whole, not restricted by the height of the factory building, and high-altitude operations can be avoided.

[0073] The present invention has a simple overall manufacturing process, easy maintenance of the manufacturing equipment, and easy adjustment of temperature, supply rate, stretch rate, tensile force, etc. As a result, various flat glass substrates such as alkali-containing high aluminosilicate, alkali-containing medium aluminosilicate, and alkali-free silicate can be processed into ultra-thin flexible glass of different thicknesses.

[0074] By the above method, the parameter settings of Examples 1 to 8 and the parameters of the obtained glass products were obtained. The results are shown in Table 1. Table 1 shows the parameter settings of Examples 1 to 8 and the parameters of the obtained glass products.

Table 1

[0075] Note that the method for producing the glass base material is not particularly limited, and production methods and forming methods capable of forming sheet glass such as float forming, overflow down-draw method, and calendar forming can be used. Further, it can be used continuously with the production of the base material. Taking the overflow down-draw method as an example, the glass formed by the overflow down-draw can be fed into the manufacturing equipment of the present invention and connected to the manufacturing process of the glass mother board to form the continuous production of ultra-thin flexible glass.

[0076] As described above, the embodiments of the present invention have been described with reference to the accompanying drawings. However, the present invention is not limited to the above specific embodiments and application fields. The above specific embodiments are merely illustrative and guiding, not restrictive. Those skilled in the art can create many forms based on the suggestions in this specification without departing from the protection scope described in the claims of the present invention, and all of these are included in the protection scope of the present invention.

Explanation of Reference Numerals

[0077] 1 Supply system 2 Preheating annealing furnace body 3 End clamping system 4 Stretch system 5 Coating System 6 Rewinding System 7 Cutting System 11 Supply Driving Device 12 Supply End Clamping Device 13 Supply 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 Stretch Operation Guide Rail 43 Stretch Arm 44 Tensile Force Driving Device

Claims

1. The preheating annealing furnace body (2) includes a feed system (1) and a stretching system (4) on both sides of the preheating annealing furnace body (2), an end clamping system (3) is disposed from the feed end of the preheating annealing furnace body (2) to the inside of the furnace, and a coating system (5), a rewinding system (6) and a cutting system (7) are sequentially connected to the stretching system (4); The end clamping system (3) includes a first clamping device (31) and a second clamping device (32), both of which are formed by a lamination bar and a lamination support, the lamination support being vertically connected to the lamination bar and disposed at the throat of the pre-heating annealing furnace body (2), and rollers (33) are provided above and below the lamination bar.

2. 2. The ultra-thin flexible glass manufacturing apparatus according to claim 1, wherein the supply system (1) includes a supply drive device (11), a supply end clamp device (12) and a supply guide rail (13), the supply drive device (11) being connected to one side of the supply guide rail (13), and the supply end clamp device (12) being disposed on the supply guide rail (13).

3. 2. The apparatus for manufacturing ultra-thin flexible glass according to claim 1, wherein the central part of the preheating annealing furnace body (2) is connected to the supply end and the discharge end in the form of a channel, an insulating layer and a refractory fiber insulating layer are provided on the outside of the channel of the preheating annealing furnace body (2), an insulating plywood is provided between the preheating section and the heating section of the preheating annealing furnace body (2) and between the heating section and the annealing section, and the cross-sectional size of the insulating plywood in the channel is adjustable, a furnace body heating device (21) is provided in the preheating annealing furnace body (2), and the furnace body heating device (21) is divided into two modules, a preheating module and a softening module, and each heating module has multiple groups of heating wires or heating rods.

4. 2. The ultra-thin flexible glass manufacturing apparatus according to claim 1, wherein a furnace temperature control device is provided in the preheating annealing furnace (2), the furnace temperature control device including a programmable PID controller, an ammeter, a voltmeter, and a thermocouple (22) for measuring temperature, the thermocouple (22) for measuring temperature being arranged in a mesh pattern above the preheating section, the heating section, and the annealing section.

5. The stretching system (4) is connected to the annealing port of the preheating annealing furnace body (2), The stretching system (4) includes a discharge end clamping device (41), a stretching action guide rail (42), a stretching arm (43) and a tensioning drive device (44); 2. The ultra-thin flexible glass manufacturing apparatus according to claim 1, wherein the discharge end clamping device (41) is disposed on the stretching operation guide rail (42), the discharge end clamping device (41) is connected to the stretching arm (43), and the tension driving device (44) acts on the stretching arm (43) to stretch the clamped glass with a tension force.

6. The apparatus for manufacturing ultra-thin flexible glass according to claim 1, wherein the coating system (5) applies a coating film having a thickness of 0.1 to 0.5 mm to both sides of the glass by electrostatic adsorption.

7. The apparatus for manufacturing ultra-thin flexible glass according to claim 6, wherein the coating film used for the coating is selected from a polyethylene film, a polypropylene film, a polyvinyl chloride film, and a polyester film.

8. The ultra-thin flexible glass manufacturing apparatus according to claim 1, wherein the cutting system (7) comprises a cutting blade, a cutting blade driving device and a cutting and dust removing device.

9. 2. The apparatus for manufacturing ultra-thin flexible glass according to claim 1, further comprising an edge cooling device connected to the edge clamping system (3).

10. A method for producing ultra-thin flexible glass based on the ultra-thin flexible glass producing apparatus according to any one of claims 1 to 9, A method for producing ultra-thin flexible glass, comprising the steps of: conveying a glass raw sheet into a channel of a furnace body and clamping it with an end clamping system (3); preheating the conveyed glass in a preheating / annealing furnace body (2); entering a heating zone after the glass reaches a preheating temperature, uniformly heating the glass to soften it at a stretching temperature; sending the glass to a stretching system (4) for stretching; precisely annealing the stretched glass, and sending it to a coating system (5) for coating; sending it to a rewinding system (6) for rewinding after coating is completed; and completing the rewinding according to a predetermined rewinding size in a cutting system (7).

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