A lamination method, equipment and preparation process of foldable ultra-thin glass cover

Abstract

The present invention discloses a lamination method, equipment and preparation process of a foldable ultra-thin glass cover plate. The lamination preparation method and equipment are one of the links of the lamination process in the preparation process of the foldable ultra-thin glass cover plate, which is the latter link of laser cutting. After the foldable ultra-thin glass mother plate is laser cut to form the UTG to be laminated, multiple UTGs are laminated and CNC edge grinding is performed. Its beneficial effects are: adopting an automated lamination method, less personnel input, fast preparation, high output rate; and standardized preparation, high yield rate; using water-soluble UV glue as an adhesive, the automated production mechanism is simple; in the subsequent lamination process, UTG is easy to separate and not easy to break; placing spacing paper between two adjacent glass sheets to be laminated can fix the distance between every two adjacent glass sheets to be laminated, and in the subsequent grinding and polishing and smoothing process, the edges of the glass sheets form consistent chamfers to improve the edge strength of UTG.

Description

Technical Field

[0001] The invention discloses a mobile phone cover plate preparation technology, and in particular relates to a lamination method and equipment for a foldable ultra-thin glass cover plate and a preparation process thereof. Background Art

[0002] Foldable screen mobile phone is a type of smart phone. Flexible AMOLED screen is the key breakthrough for foldable screen mobile phone to realize the folding function. Foldable screen mobile phone is like "Transformers". When the screen is folded, it is still the size of a traditional mobile phone, which is convenient to carry. When opened, it becomes a tablet computer with both entertainment and office functions, catering to the current consumer demand for portability and diverse functions.

[0003] Currently, mobile phone manufacturers such as Samsung, Huawei, Motorola, and Xiaomi have begun to launch foldable screen mobile phones. In order to solve the crease problem of the screen plastic cover and strengthen the protection of the AMOLED panel underneath, Samsung Electronics has introduced the concept of foldable ultra-thin glass (UTG) in early 2020 as a protective cover for foldable screen mobile phones, and successfully launched the Galaxy Z Flip mobile phone; and will launch a new foldable screen mobile phone that supports the S Pen function. The industry predicts that the market for foldable mobile phones will exceed 10 million units in 2020, and may grow to 70 million units in 2022, and the UTG protective cover will be in short supply.

[0004] The high price of foldable screen mobile phones is directly related to the fact that the current production technology cannot achieve mass production. In the production process of foldable ultra-thin glass (UTG) cover, there is a lamination process, such as Figure 1 As shown, the UTG motherboard 1 is introduced into the workbench, and the UTG motherboard 1 is cut and opened by laser to form a number of UTG10 to be stacked, and 20 to 30 laser-cut UTG10 to be stacked are stacked together to form a stacked UTG13, and then the stacked UTG13 is subjected to CNC (numerical control) edge grinding process. In the preparation process of the stacking, the traditional stacking method is to place the jig on the heating plate, place the UTG10 to be stacked in a manual stacking manner, and use wax as an adhesive between adjacent UTG glasses. This operation method has many defects, such as:

[0005] (1) Manual operation requires many people and man-hours, and the production speed is slow and the output rate is low; the prepared products are significantly differentiated and the yield rate is low;

[0006] (2) Using wax as an adhesive is not easy to automate production;

[0007] (3) UTG is prone to cracking during the slicing process after the grinding process.

[0008] Therefore, in view of the defects of the prior art, technicians in this field are committed to developing a lamination method, equipment and preparation process of a foldable ultra-thin glass cover, so as to improve the efficiency and quality in the mass production of the foldable ultra-thin glass cover. Summary of the invention

[0009] The purpose of the present invention is to provide a lamination method, equipment and preparation process of a foldable ultra-thin glass cover plate, so as to change the manual processing method, realize mass production of the cover plate through mechanized production, improve the yield rate of the cover plate, and solve the problems in the background technology.

[0010] The purpose of the present invention is to be achieved through the following technical solutions:

[0011] A lamination method for a foldable ultra-thin glass cover plate, which is one of the steps in the lamination process in the preparation process of the foldable ultra-thin glass cover plate, and is the latter link of laser cutting. After a foldable ultra-thin glass (UTG) mother plate is laser cut to form a UTG to be laminated, multiple UTG sheets are laminated and CNC edge grinding is performed; the method steps include:

[0012] Step 1: Place the thick glass sheets on both sides required for preparing the cover plate and the UTG to be laminated between the thick glass sheets on both sides in sequence;

[0013] Step 2: stack the leading thick glass sheet, the UTG sheet to be stacked, and the trailing thick glass sheet in the thick glass sheets on both sides in sequence, and achieve bonding between the two adjacent glass sheets by dispensing glue;

[0014] Step 3: Pressurize and solidify the UTG stacked in Step 2 to complete the stacking process of the foldable ultra-thin glass cover to form a stacked UTG.

[0015] Furthermore, the thick glass sheets on both sides and the UTG to be laminated placed between the thick glass sheets on both sides are of the same size.

[0016] Furthermore, the glass sheets stacked in sequence in Step 2 need to be set for stacking calibration, so as to achieve calibration and alignment between the glass sheets stacked each time and the glass sheets stacked in the previous step.

[0017] Furthermore, in Step 2, the glue dispensing is performed in the form of a glue frame coating, and the edge of the placed glass sheet is subjected to a glue dispensing frame treatment.

[0018] Furthermore, in Step 2, water-soluble UV glue is used as an adhesive to achieve bonding between two adjacent glass sheets.

[0019] Furthermore, in Step 2, spacer paper is placed between two adjacent layers of glass sheets to fix the distance between the two adjacent layers of glass sheets.

[0020] In order to realize the above-mentioned lamination method, the present invention also provides a lamination preparation device for a foldable ultra-thin glass cover plate, which at least includes a feed cassette, a gripping device and a lamination device; wherein, the feed cassette is used to place the thick glass sheets on both sides required for preparing the stacked UTG and the UTG to be stacked placed between the thick glass sheets on both sides; the gripping device at least includes a front gripping device and a rear gripping device, wherein the front gripping device is arranged upstream of the feed cassette, and is used to transfer the glass sheets in the feed cassette to the lamination device in sequence, and the rear gripping device is arranged downstream of the lamination device, and is used to transfer the stacked UTG that has been stacked on the lamination device to a discharge track; the lamination device is arranged between the front gripping device and the rear gripping device, and is used to realize the stacking and fixation of the UTG to be stacked.

[0021] Furthermore, the feed cassette is a square structure, and the UTG to be stacked is placed in a vertical position in the feed cassette, which is convenient for the front gripping device to grip.

[0022] Furthermore, the stacking device at least includes a stacking mechanism, a glue dispensing mechanism, a paper placing mechanism and a curing mechanism; wherein the stacking mechanism at least includes a supporting base, the supporting base is used to place the UTG to be stacked, the glue dispensing mechanism, the paper placing mechanism and the curing mechanism are respectively arranged on both sides of the supporting base to implement the stacking process, and are used for glue dispensing, paper placing and curing on the UTG to be stacked.

[0023] Furthermore, the supporting base of the stacking mechanism is square-shaped according to the shape of the UTG to be stacked, and an "L"-shaped stacking calibration part is arranged at the adjacent two side edges, and a push plate is arranged at the two side edges opposite to the stacking calibration part on the supporting base, and the stacking calibration part is used as a reference, and the UTG to be stacked is calibrated layer by layer through the cooperation of the push plate.

[0024] Furthermore, a vertically penetrating groove is provided in the middle of the supporting base, so as to enable the rear grasping device to extend into the groove and grasp the stacked UTG as a whole.

[0025] Furthermore, a plurality of interconnected air holes are provided on the outer ring of the groove on the bearing base, and after the leading thick glass sheet is placed and calibrated, the leading thick glass sheet is fixed through the air holes.

[0026] Furthermore, the spacer paper of the paper placing mechanism is placed at the middle of the glass sheet, and the area of ​​the spacer paper is smaller than the area of ​​the glass sheet, so that a glue spot is formed on the surface of the glass sheet.

[0027] Furthermore, the glue dispensing mechanism applies water-soluble UV glue on the glue dispensing portion of the glass sheet.

[0028] Furthermore, the curing mechanism uses UV light to adsorb and fix two adjacent glass sheets according to the glue type of the dispensing mechanism.

[0029] The present invention provides a preparation process for a foldable ultra-thin glass cover plate, wherein the lamination process of the preparation process at least adopts the lamination method for the foldable ultra-thin glass cover plate described above, and the lamination preparation is achieved by the lamination preparation equipment described above.

[0030] By implementing the above-mentioned lamination method, device and preparation process of the foldable ultra-thin glass cover, the following beneficial effects are achieved:

[0031] (1) The technical solution involved in the present invention adopts an automated lamination method, which replaces manual lamination with a mechanical mechanism, with less manpower input, fast preparation, and high output rate; and standardized preparation has a high yield rate;

[0032] (2) The technical solution involved in the present invention uses water-soluble UV glue as an adhesive, and the automated production mechanism is simple; and in the subsequent slicing process, the UTG is easy to separate and not easy to break by using the water-soluble UV glue as an adhesive;

[0033] (3) In the technical solution involved in the present invention, a spacing paper is placed between two adjacent glass sheets to be stacked, so as to fix the distance between each two adjacent glass sheets to be stacked. In the subsequent grinding and polishing process, the edges of the glass sheets form a consistent chamfer, thereby improving the edge strength of UTG. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of the UTG cover plate manufacturing process in the background technology of the present invention;

[0035] Figure 2 It is an overall structural diagram of the lamination equipment in a specific embodiment of the present invention;

[0036] Figure 3 for Figure 2 A schematic diagram of the structure of the feed cassette;

[0037] Figure 4 for Figure 2 Schematic diagram of the lamination mechanism structure;

[0038] Figure 5 for Figure 4 Schematic diagram of the cross section of the bearing base;

[0039] Figure 6 for Figure 5 Top view;

[0040] Figure 7 for Figure 2 Schematic diagram of the surface of glass sheets during stacking.

[0041] Figure 8 It is a flow chart of the lamination method in a specific embodiment of the present invention;

[0042] in:

[0043] 1. UTG motherboard; 10. UTG to be stacked; 11. Leading thick glass sheet; 12. Rear leading thick glass sheet; 13. Stacked UTG;

[0044] 2. Feed cassette;

[0045] 30. Front grabbing device; 31. Rear grabbing device;

[0046] 4. Lamination device; 40. Lamination mechanism; 400. Supporting base; 401. Lamination calibration unit; 402. Push plate; 403. Groove; 404. Air hole; 41. Glue dispensing mechanism; 410. Glue dispensing unit; 42. Paper placing mechanism; 420. Spacer paper; 43. Curing mechanism. DETAILED DESCRIPTION

[0047] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The specific embodiment of the present invention provides a foldable ultra-thin glass cover lamination preparation device, which is suitable for Figure 1 In the step of the lamination process in the preparation process of the foldable ultra-thin glass cover shown, equipment is used for the latter preparation link of laser cutting. The foldable ultra-thin glass (UTG) motherboard 1 is laser cut to form the UTG10 to be laminated, and CNC edge grinding is performed after multiple UTG sheets are stacked.

[0049] It should be noted that in the existing stacked UTG preparation process, 20-30 sheets of UTG10 to be stacked are generally required to form a stacked UTG13, and two guide thick glass sheets (11, 12) are set at the front and back. The thickness of the two guide thick glass sheets (11, 12) usually used is 0.7 mm, and the interval between the two adjacent glass sheets prepared is generally 10-15 μm.

[0050] The structure of the lamination preparation equipment of this technical solution is as follows Figure 2 As shown, it at least includes a feed cassette 2, a gripping device and a stacking device 4.

[0051] Wherein, the feed cassette 2 is as follows Figure 3The square structure shown is used to place the leading thick glass sheet 11, the rear thick glass sheet 12 and the UTG 10 to be stacked placed between the two side guide thick glass sheets (11, 12) required for preparing the stacked UTG 13. The UTG motherboard 1 is formed into the UTG 10 to be stacked after laser cutting and is placed in the feed cassette 2. Generally, 10-50 sheets of UTG 10 to be stacked are placed in one feed cassette 2, and the preferred number of sheets is 30. In the present technical solution, the leading thick glass sheet 11 and the rear thick glass sheet 12 have a thickness range of 0.7-1.1 mm, and serve as the upper and lower substrates of the stacked UTG 13, and protect the stacked UTG 13 during subsequent edge grinding and other processing.

[0052] The length and width of the square structure of the feed cassette 2 are the same as those of the UTG10 to be stacked, so that the UTG10 to be stacked is placed vertically, with a leading thick glass sheet 11 at the front end, a rear leading thick glass sheet 12 at the rear end, and the UTG10 to be stacked in the middle to facilitate grabbing by the grabbing device.

[0053] Among them, Figure 2 , Figure 4 As shown, the gripping device at least includes a front gripping device 30 and a rear gripping device 31, wherein the front gripping device 30 is arranged upstream of the feed cassette 2, and is used to transfer the glass sheets in the feed cassette 2 to the stacking device 4 in sequence, and the rear gripping device 31 is arranged downstream of the stacking device 4, and is used to transfer the stacked UTG13 that has been stacked on the stacking device 4 to the discharge track.

[0054] In this embodiment, the front grasping device 30 adopts a suction cup robot, which clamps the leading thick glass 11 or the UTG10 to be stacked or the trailing thick glass sheet 12 in the vertical direction, and after reversing, makes the leading thick glass 11 or the UTG10 to be stacked or the trailing thick glass sheet 12 horizontal and places it on the stacking device 4.

[0055] In this embodiment, the rear gripping device 31 is a clamping robot that clamps the stacked UTG 13 from the stacking device 4 .

[0056] Among them, Figure 2 , Figure 4 As shown, the laminating device 4 is arranged between the front gripping device 30 and the rear gripping device 31, and is used to realize the lamination and fixation of the UTG10 to be laminated; the laminating device 4 at least includes a laminating mechanism 40, a dispensing mechanism 41, a paper placing mechanism 42 and a curing mechanism 43; wherein the laminating mechanism 40 at least includes a supporting base 400, such as Figure 5As shown, the carrier base 400 is used to place the UTG10 to be stacked. According to the shape of the UTG10 to be stacked, it is arranged in a square shape and has a long side and a short side. The front gripping device 30 and the rear gripping device 31 are respectively arranged in the two short sides of the carrier base 400, so that the UTG10 to be stacked moves along the direction of the short side. A stacking calibration part 401 is arranged at the edge of a group of adjacent long sides and short sides of the carrier base 400, and the stacking calibration part 401 is generally arranged in an "L" shape. At the same time, push plates 402 are set at the other long sides and short sides of the supporting base 400 opposite to the stacking calibration part. As shown in the figure, two push plates 402 are set at the long sides, and one push plate 402 is set at the short sides. With the stacking calibration part 401 as a reference, the layer-by-layer calibration of the UTG10 to be stacked is achieved through the cooperation and advancement of the push plates 402. In actual operation, the two push plates 402 on the long sides are pushed first, and then the push plate 402 on the short side is pushed to ensure that the glass workpiece will not be pushed crooked when being pushed. It is worth noting that if the UTG to be stacked is square, the same applies, and two push plates 402 can be set on one side.

[0057] like Figure 2 , Figure 5 , Figure 6 As shown, there is a vertically penetrating groove 403 in the middle of the supporting base 10, and one side of the groove 403 is connected with the long side of one side of the supporting base 400 provided with two push plates 402, which is an inverted "convex" shape when viewed from above. The rear grasping device 31, that is, the clamping robot used in the present technical solution, extends into the supporting base 400 from the groove 403 to clamp and transfer the stacked UTG13 together.

[0058] like Figure 5 , Figure 6 As shown, a plurality of interconnected air holes 404 are provided on the outer circle of the groove 403 on the supporting base 400, and the air holes 404 are externally connected to a vacuum generator. After the leading thick glass sheet 11 is placed on the supporting base 400 and calibrated by the stacking calibration part 401 and the push plate 402, the leading thick glass sheet 11 is fixed through the air holes 404.

[0059] The glue dispensing mechanism 41, the paper placing mechanism 42 and the curing mechanism 43 are respectively arranged on both sides of the supporting base 400 to realize the lamination process, and are used for dispensing glue, placing paper and curing on the UTG10 to be laminated. Figure 2 , Figure 4 As shown, the supporting base 400 is provided with a push plate 402, and a paper placing mechanism 42 and a curing mechanism 43 are provided on one side of the long side. The paper placing mechanism 42 here uses a conventional paper placing machine. After a glass sheet is placed, the paper placing machine immediately places a spacer paper 420 on the upper surface of the glass sheet. Figure 7As shown, the spacer paper 420 is placed in the middle of the glass sheet, and its area is smaller than the upper surface area of ​​the glass sheet. The difference between the area of ​​the spacer paper 420 and the area of ​​the glass sheet forms the glue dispensing part 410; the glue dispensing mechanism 41 is arranged on one side of the long side of the stacking reference part 401 of the supporting base 400.

[0060] The glue dispensing mechanism 41 can be a conventional glue dispensing machine, and the glue dots are water-soluble UV glue. The glue dispensing machine symmetrically and dispersedly applies a plurality of water-soluble UV glue dots on the glue dispensing portion 410 on the upper surface of the glass sheet; in actual operation, the UV glue dots are applied outside the spacer paper 420, and can be applied in a plurality of dots or in a circle.

[0061] The curing mechanism 43 uses UV light to fix two adjacent glass sheets according to the glue dispensing type of the glue dispensing mechanism 41. In actual operation, after the water-soluble UV glue is applied, the front grasping device 30, that is, the suction cup manipulator used in the present technical solution, grasps another glass sheet. After calibration and alignment, the suction cup manipulator lightly presses the upper layer of glass sheet, and then uses UV light to irradiate it to fix the glass sheet.

[0062] In combination with the above-mentioned lamination preparation mechanism, this embodiment adopts Figure 8 The lamination method shown:

[0063] Step A: Place a leading thick glass sheet 11, twenty to thirty UTG sheets 10 to be stacked, and a trailing thick glass sheet 12 required for preparing the cover plate in the feed cassette 2 in sequence, and place them in front of the supporting base 400;

[0064] Step B: Grab a leading thick glass sheet 11 by the front grabbing device 30 (i.e., the suction cup manipulator used in this solution) and place it on the supporting base 400, calibrate it by the stacking calibration part 401 and the push plate 402 provided on the supporting base 400, and then fix it by adsorption through a plurality of connected air holes 404 provided on the outer circle of the supporting base 400;

[0065] Step C: a layer of spacer paper 420 is placed at the center of the upper surface of the leading thick glass sheet 11 by a paper placing mechanism 42 (i.e., the paper placing machine used in this solution). The thickness of the spacer paper 420 is generally 10 μm. A glue spot 410 is formed at the portion where the spacer paper 420 contacts the upper surface of the leading thick glass sheet 11.

[0066] Step D: Apply UV glue frame on the glue dispensing part 410 through the glue dispensing mechanism 41 (i.e., the glue dispensing machine used in this solution), and the general coating thickness is 15 μm;

[0067] Step E: Grab a piece of UTG10 to be stacked by the front grabbing device 30 (i.e., the suction cup manipulator used in this solution) and repeat the calibration steps of Step B to Step D. The upper glass sheet is lightly pressed by the front grabbing device 30 (i.e., the suction cup manipulator used in this solution). After pressing, a UV lamp is used to irradiate it to solidify the upper and lower glass sheets.

[0068] Step F: Repeat Step E twenty to thirty times (repeat the corresponding number of times according to the actual number of UTG10 to be stacked); after all the UTG10 to be stacked are placed, the front grabbing device 30 (i.e., the suction cup manipulator used in this solution) grabs the rear thick glass sheet 12 and repeats the curing step of Step E;

[0069] Step G: The rear gripping device 31 (the gripping robot used in this solution) grips the stacked UTG 13 formed in the aforementioned steps Step B-Step F through the groove 403 provided on the supporting base 400, and transfers it to the discharge track to enter the next process.

[0070] In actual operation, the applicant used 30 pieces of UTG to be stacked as test objects, and the preparation time using the above-mentioned equipment and method was 10 minutes. The output per day (calculated as 20 working hours) was 120 batches of stacked UTG, and a total of 3,600 pieces of UTG to be stacked were stacked. The monthly production capacity of a single machine can complete the stacking of approximately 100,000 pieces of UTG to be stacked, greatly improving the efficiency of batch production and achieving a high yield rate.

[0071] It should be noted that, unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field of the present invention. After considering the specification and practicing the invention here, those skilled in the art will easily think of other embodiments of the present invention. This application is intended to cover any use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed by the present invention. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present invention are indicated by the claims.

[0072] It should be understood that the present invention is not limited to the structures described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A lamination method for a foldable ultra-thin glass cover, characterized in that: This method is one of the steps in the lamination process in the preparation process of the foldable ultra-thin glass cover plate, and is the latter link of laser cutting. After the foldable ultra-thin glass mother plate is laser cut to form the UTG to be laminated, multiple UTGs are laminated and CNC edge grinding is performed; The method steps include: Step 1: Place the thick glass sheets on both sides required for lamination and the UTG to be laminated between the thick glass sheets on both sides in sequence; Step 2: stack the leading thick glass sheet, the UTG to be stacked and the trailing thick glass sheet in the thick glass sheets on both sides in sequence, and achieve bonding between two adjacent glass sheets by dispensing glue; the glass sheets stacked in sequence in Step 2 need to set stacking calibration to achieve calibration and alignment between the glass sheets stacked each time and the glass sheets stacked in the previous step; wherein, each stacked glass sheet is placed between a stacking calibration part with an overall "L"-shaped layout and another set of push plates arranged at the long side and the short side opposite to the stacking calibration part, and is pushed forward by the cooperation of the push plates with the stacking calibration part as a reference to achieve layer-by-layer calibration of the UTG to be stacked; Step 3: Pressurize and solidify the UTG stacked in Step 2 to complete the stacking process of the foldable ultra-thin glass cover to form a stacked UTG.

2. The lamination method of the folded ultra-thin glass cover plate according to claim 1, characterized in that: The thick glass sheets on both sides and the UTG to be stacked placed between the thick glass sheets on both sides are of the same size.

3. The lamination method of the folded ultra-thin glass cover plate according to claim 1, characterized in that: In Step 2, the glue dispensing is carried out in the form of coating a glue frame, and the edges of the placed glass sheets are treated with a glue dispensing frame; the glue dispensing uses water-soluble UV glue as an adhesive to achieve bonding between two adjacent glass sheets.

4. The lamination method of the folded ultra-thin glass cover plate according to claim 1, characterized in that: In Step 2, spacer paper is placed between two adjacent layers of glass to fix the distance between the two adjacent layers of glass.

5. A lamination preparation device for preparing a foldable ultra-thin glass cover, characterized in that: The equipment at least comprises a feed cassette, a gripping device and a stacking device; wherein the feed cassette is used to place the thick glass sheets on both sides required for preparing the stacked UTG and the UTG to be stacked placed between the thick glass sheets on both sides; the gripping device at least comprises a front gripping device and a rear gripping device, wherein the front gripping device is arranged upstream of the feed cassette, and is used to transfer the glass sheets in the feed cassette to the stacking device in sequence, and the rear gripping device is arranged downstream of the stacking device, and is used to transfer the stacked UTG that has been stacked on the stacking device to the discharge track; the stacking device is arranged between the front gripping device and the rear gripping device, and is used to realize the stacking and fixing of the UTG to be stacked; The stacking device at least includes a stacking mechanism, a glue dispensing mechanism, a paper placing mechanism and a curing mechanism; wherein the stacking mechanism at least includes a supporting base, the supporting base is used to place the UTG to be stacked, the supporting base is square-shaped according to the shape of the UTG to be stacked, and an "L"-shaped stacking calibration part is arranged at its adjacent two side edges, and a push plate is arranged at the two side edges of the supporting base opposite to the stacking calibration part, and with the stacking calibration part as a reference, the UTG to be stacked is calibrated layer by layer through the cooperation and advancement of the push plate.

6. The lamination preparation device for a foldable ultra-thin glass cover plate according to claim 5, characterized in that: The feed cassette is a square structure, and the UTG to be stacked is placed in a vertical position in the feed cassette, which is convenient for the front gripping device to grip.

7. The lamination preparation device for a foldable ultra-thin glass cover plate according to claim 5, characterized in that: A vertically penetrating groove is arranged in the middle of the supporting base, so as to enable the rear grabbing device to extend from the groove to grab the stacked UTG as a whole; a plurality of interconnected air holes are arranged on the outer ring of the groove on the supporting base, and after the leading thick glass sheet is placed and calibrated, the leading thick glass sheet is adsorbed and fixed through the air holes; Among them, the glue dispensing mechanism, paper placing mechanism and curing mechanism are respectively arranged on both sides of the supporting base to realize the stacking process, and are used for glue dispensing, paper placing and curing on the UTG to be stacked; wherein, the curing mechanism uses UV lamp irradiation to fix two adjacent glass sheets according to the glue type of the glue dispensing mechanism.

8. The lamination preparation device for a foldable ultra-thin glass cover plate according to claim 7, characterized in that: The spacer paper of the paper placing mechanism is placed in the middle of the glass sheet, and the area of ​​the spacer paper is smaller than that of the glass sheet, and a glue spot is formed on the surface of the glass sheet. The glue spot mechanism spots water-soluble UV glue on the glue spot of the glass sheet.

9. A process for preparing a foldable ultra-thin glass cover, characterized in that: The lamination process of the preparation technology at least adopts the lamination method of the foldable ultra-thin glass cover plate described in any one of the aforementioned claims 1-4, and the lamination preparation is achieved by the lamination preparation equipment described in any one of the aforementioned claims 5-8.

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