Flexible film laminating device and laminating method thereof

Abstract

The present application discloses a flexible film laminating device and a laminating method thereof, which relate to the technical field of multi-layer flexible screen laminating, and are used to laminate a flexible film to the inner side of a curved cover plate, comprising a lifting platform, a frame provided on the top of the lifting platform, the top of the frame being used to support the flexible film, an inflatable first airbag provided in the frame, sliders respectively located on both sides of the frame connected to the first airbag, the sliders being slidably connected to the top of the lifting platform, the top surfaces of the sliders being flush with the top surface of the frame, the two sliders being used to slide simultaneously in a direction away from the frame under the action of the expansion of the first airbag, and the first airbag being able to adhere to the bottom surface of the flexible film when fully inflated. The present application has the advantages of improving the laminating yield and laminating efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of multi-layer flexible screen lamination, and in particular to a flexible film lamination device and a lamination method thereof. Background Art

[0002] A curved screen is a display screen made of flexible plastic, primarily realized through an OLED panel. Compared to flat screens, curved screens are more flexible and less prone to breakage. To prepare a curved screen, a flexible film must be bonded to the inside of a curved cover. This process requires first bonding OCA optical adhesive to the bonding surface of the flexible film, and then bonding the side of the flexible film with the OCA adhesive to the curved cover. Existing curved screen bonding machines generally use the principle of integral bonding, which easily generates many small bubbles after bonding and results in a low bonding yield. Subsequent camera inspections that fail the test require rework and re-bonding, making it difficult to meet the requirements in one go, impacting production efficiency. Summary of the Invention

[0003] The main purpose of this application is to provide a flexible film laminating device and a laminating method thereof, aiming to solve the technical problem of low laminating yield of existing curved screen laminating machines.

[0004] To achieve the above-mentioned purpose, the present application provides a flexible film bonding device for bonding a flexible film to the inner side of a curved cover plate, comprising a lifting platform, a frame provided on the top of the lifting platform, the top of the frame being used to support the flexible film, an inflatable first airbag provided in the frame, sliders located on both sides of the frame are connected on both sides of the first airbag, the sliders are slidably connected to the top of the lifting platform, the top surface of the sliders is flush with the top surface of the frame, the two sliders are used to slide simultaneously in a direction away from the frame under the action of the expansion of the first airbag, and the first airbag can be tightly attached to the bottom surface of the flexible film when it is fully inflated.

[0005] Optionally, the first airbag is used to adhere the flexible membrane to the flat area of ​​the curved cover plate, and an inflatable second airbag is provided on the side of the two sliders away from the frame. When the second airbag is fully inflated, the two sides of the flexible membrane can be adhered to the curved area of ​​the curved cover plate.

[0006] Optionally, a rolling mechanism is provided on the side of the two second airbags away from the slider, one end of the rolling mechanism is in rolling contact with the bottom surface of the flexible membrane, and the other end of the rolling mechanism is hinged to the side wall of the slider, and the hinge position is located below the second airbag.

[0007] Optionally, the rolling mechanism includes a hollow cylinder hinged to the side wall of the slider, the side wall of the hollow cylinder is connected to the second airbag, the hollow cylinder is provided with a compression spring, the compression spring is connected to a piston block for sliding along the inner wall of the hollow cylinder, the piston block is connected to a connecting rod movably extending out of one end of the hollow cylinder, the connecting rod is connected to a bracket, the bracket is movably connected to a rolling wheel, and the rolling wheel is used to contact the bottom surface of the flexible membrane.

[0008] Optionally, an inflation component is further included, which is used to directionally inflate the first airbag or the second airbag.

[0009] Optionally, the inflation assembly includes a first air pipe connected to the first airbag, the first air pipe passes through the bottom of the frame and the lifting platform and is connected to a four-way solenoid valve, the four-way solenoid valve is connected to an air intake pipe and two second air pipes, the air intake pipe is used to connect to the air supply equipment, the second air pipe movably passes through the lifting platform and movably extends into the slider to connect to the corresponding second airbag, and the second air pipe is a hose.

[0010] Optionally, a side of the top of the slider away from the frame is provided with a rounded corner, and the curvature of the rounded corner is the same as the curvature of the curved area of ​​the curved cover plate.

[0011] Optionally, a telescopic cylinder is connected to the bottom of the lifting platform, and a guide groove that slides with a corresponding slider is provided on the top of the lifting platform.

[0012] To achieve the above objectives, the present application further provides a flexible film laminating method, based on the above-mentioned flexible film laminating device, comprising the following steps:

[0013] Install and fix the curved cover;

[0014] Place the flexible film with OCA optical adhesive on top of the frame, with the OCA optical adhesive facing upwards and close to the curved cover plate;

[0015] The state image of the flexible film is collected by an industrial camera; wherein the state image includes the end face profile information of the flexible film and the curved cover plate;

[0016] According to the status image, determine whether the flexible membrane is symmetrically installed on the top of the frame;

[0017] If not, adjust the installation position of the flexible membrane until the flexible membrane is symmetrically installed on the top of the frame;

[0018] If yes, move the lifting platform upwards so that the frame fits the middle area of ​​the flexible membrane to the middle area of ​​the curved cover plate;

[0019] Inflate the first airbag at a preset inflation rate, so that the first airbag expands and pushes the two sliders to slide along the top of the lifting platform. During the sliding process, the top of the slider gradually adheres the flexible membrane from the middle to the sides to the flat area of ​​the curved cover plate until the first airbag is fully inflated, and then stop inflating;

[0020] The two second airbags are inflated simultaneously at a preset inflation rate, so that the two second airbags expand simultaneously and drive the corresponding rolling mechanisms to rotate. During the rotation process, one end of the rolling mechanism gradually fits the two side areas of the flexible membrane to the curved surface area of ​​the curved cover plate until the second airbags are fully inflated and the inflation is stopped;

[0021] After the first airbag and the second airbag are pressurized for a preset time, the lifting platform is moved downward to complete the lamination of the flexible film.

[0022] Optionally, judging whether the flexible membrane is symmetrically installed on the top of the frame according to the status image includes:

[0023] According to the state image, the target endpoints on both sides of the flexible membrane and the reference endpoints on both sides of the curved cover plate are identified;

[0024] Respectively identify the actual distances between the target endpoint and the adjacent reference endpoints;

[0025] It is determined whether the two actual distances are equal. If so, it is determined that the flexible membrane is symmetrically installed on the top of the frame. If not, it is determined that the flexible membrane is asymmetrically installed on the top of the frame.

[0026] The beneficial effects that this application can achieve are as follows:

[0027] Based on the bonding device of the present application, after the flexible film is placed on the top of the frame, the frame and the flexible film can be driven to move upward as a whole by the lifting platform until the middle area of ​​the flexible film is tightly attached to the middle of the inner side of the curved cover above. This process can first perform local bonding of the middle area of ​​the flexible film, which is also a process of positioning and fixing the flexible film. Then, the first airbag is slowly inflated, so that the first airbag gradually expands and pushes the sliders on both sides to slide synchronously along the top of the lifting platform. During the sliding process, the top of the slider gradually bonds the flexible film from the middle to the sides to the bottom surface of the curved cover. Therefore, compared with the existing overall bonding method, the present application adopts The method of gradually laminating from the middle of the flexible film to both sides can help squeeze out bubbles from both sides, thereby effectively reducing the generation of bubbles and improving the laminating yield. In addition, the flexible film is laminated from the middle to both sides at the same time. Compared with the unilateral laminating method, the laminating efficiency is higher. When the first airbag is fully inflated, the inflation is stopped. At this time, the first airbag can be close to the bottom surface of the flexible film to maintain pressure and improve the laminating stability. At the same time, the first airbag can serve as a driving mechanism to promote the movement of the slider, killing two birds with one stone. There is no need to add an additional driving mechanism, which improves the operating efficiency, makes the overall structure lighter, and reduces the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0029] Figure 1 This is a structural schematic diagram of a flexible film laminating device in an embodiment of the present application (when the flexible film is not laminating to the curved cover plate);

[0030] Figure 2 This is a schematic structural diagram of another state of a flexible film laminating device in an embodiment of the present application (when the lifting platform moves upward);

[0031] Figure 3 for Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0032] Figure 4 This is a schematic structural diagram of another state of a flexible film laminating device in an embodiment of the present application (when the first airbag is fully inflated);

[0033] Figure 5 This is a schematic structural diagram of another state of a flexible film laminating device in an embodiment of the present application (when the second airbag is fully inflated);

[0034] Figure 6 This is a schematic side structural diagram of a frame in an embodiment of the present application;

[0035] Figure 7 Schematic diagram of the structure of the slider in the embodiment of the present application.

[0036] Reference numerals:

[0037] 110-flexible membrane, 120-curved cover, 121-flat area, 122-curved area, 130-lifting platform, 131-guide groove, 140-frame, 150-first airbag, 160-slider, 161-rounded corner, 170-second airbag, 180-rolling mechanism, 181-hollow cylinder, 182-compression spring, 183-piston block, 184-connecting rod, 185-bracket, 186-rolling wheel, 190-inflating assembly, 191-first air pipe, 192-four-way solenoid valve, 193-intake pipe, 194-second air pipe, 210-telescopic cylinder, 220-target endpoint, 230-reference endpoint.

[0038] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In this application, unless otherwise specified or limited, the terms "connection" and "fixed" should be understood in a broad sense. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0043] Example 1

[0044] Reference Figure 1-Figure 7 The present embodiment provides a flexible film laminating device for laminating a flexible film 110 to the inner side of a curved cover plate 120, including a lifting platform 130. A frame 140 is provided on the top of the lifting platform 130. The top of the frame 140 is used to support the flexible film 110. An inflatable first airbag 150 is provided in the frame 140. Sliders 160 located on both sides of the frame 140 are connected to both sides of the first airbag 150. The sliders 160 are slidably connected to the top of the lifting platform 130. The top surface of the slider 160 is flush with the top surface of the frame 140. The two sliders 160 are used to slide simultaneously in a direction away from the frame 140 under the action of the expansion of the first airbag 150. When the first airbag 150 is fully inflated, it can be tightly attached to the bottom surface of the flexible film 110.

[0045] In this embodiment, after the curved cover plate 120 is fixed in place by a jig (not shown in the figure), the flexible film 110 is then placed on the top of the frame 140. The frame 140 and the flexible film 110 can be driven to move upward as a whole by the lifting platform 130 until the middle area of ​​the flexible film 110 is close to the middle part of the inner side of the curved cover plate 120 above. This process can first perform local adhesion of the middle area of ​​the flexible film 110, which is also a positioning and fixing process of the flexible film 110. Then, the first airbag 150 is slowly inflated, so that the first airbag 150 gradually expands and pushes the sliders 160 on both sides to slide synchronously along the top of the lifting platform 130. During the sliding process, the top of the slider 160 gradually adheres the flexible film 110 from the middle to the sides to the curved cover The bottom surface of the plate 120, therefore, compared with the existing overall bonding method, the present embodiment adopts a method of gradually bonding from the middle of the flexible film 110 to both sides, which is conducive to squeezing out bubbles from both sides, thereby effectively reducing the generation of bubbles and improving the bonding yield. Moreover, the flexible film 110 is bonded from the middle to both sides at the same time, which is more efficient than the unilateral bonding method. When the first airbag 150 is fully inflated, it stops inflating. At this time, the first airbag 150 can be close to the bottom surface of the flexible film 110 to maintain pressure and improve the bonding stability. At the same time, the first airbag 150 can also serve as a driving mechanism for the slider 160 to move, killing two birds with one stone, without the need for an additional driving mechanism, thereby improving the operating efficiency, making the overall structure lighter, and reducing the cost of the device.

[0046] As an optional embodiment, the first airbag 150 is used to adhere the flexible membrane 110 to the flat area 121 of the curved cover 120, and the two sliders 160 are each provided with an inflatable second airbag 170 on the side away from the frame 140. When the second airbag 170 is fully inflated, the two sides of the flexible membrane 110 can be adhered to the curved area 122 of the curved cover 120.

[0047] In this embodiment, since the curved cover plate is composed of a flat area 121 and curved areas 122 on both sides thereof, the first airbag 150 can ensure the fit between the flexible membrane 110 and the flat area 121 of the curved cover plate 120. In order to further ensure that the two sides of the flexible membrane 110 effectively fit with the curved area 122 of the curved cover plate 120, when the two sliders 160 slide to the extreme position, the second airbag 170 is slowly inflated, so that the second airbag 170 gradually expands to fit the two sides of the flexible membrane 110 to the curved area 122 of the curved cover plate 120, and finally achieves complete fit of the flexible membrane 110 on the inner side of the curved cover plate 120. The structural design is ingenious and easy to operate.

[0048] As an optional embodiment, a rolling mechanism 180 is provided on the side of the two second airbags 170 away from the slider 160, one end of the rolling mechanism 180 is in rolling contact with the bottom surface of the flexible membrane 110, and the other end of the rolling mechanism 180 is hinged to the side wall of the slider 160, and the hinge position is located below the second airbag 170.

[0049] In this embodiment, if only the expansion of the second airbag 170 is relied upon to complete the bonding of the flexible film 110 and the curved area 122 of the curved cover plate 120, this bonding process is equivalent to bonding the two sides of the flexible film 110 as a whole. Although the area where the flexible film 110 and the curved area 122 of the curved cover plate 120 are bonded is small, due to its curved structure, the bonding process still has the risk of generating more bubbles or larger bubbles. Therefore, a rolling mechanism 180 is further provided at the side end of the second airbag 170. When the second airbag 170 is inflated, it can drive the rolling mechanism 180 to gradually move away from the slider 160. It rotates automatically. During the rotation, one end of the rolling mechanism 180 can be brought into rolling contact with the bottom surface of the flexible film 110, so that the rolling mechanism 180 can gradually roll the flexible film 110 outward to fit it to the curved area 122. The bubbles can be squeezed out during the fitting process. When the second airbag 170 is fully inflated, its top surface is arc-shaped, so that the flexible film 110 can be completely pressed against the curved area 122. The pressure can be maintained for a period of time. At this time, the rolling mechanism 180 just separates from the flexible film 110, and finally completes the overall fitting of the flexible film 110 to the curved cover plate 120, further improving the fitting yield.

[0050] It should be noted that the second airbag 170 is in a negative pressure state when not inflated, so that the rolling mechanism 180 can be attached to one side of the slider 160, or the rolling mechanism 180 can be damped and hinged to the side wall of the slider 160. In the initial state, the rolling mechanism 180 is always attached to one side of the slider 160. Only when the second airbag 170 expands, it generates an outward thrust on the rolling mechanism 180 and causes it to rotate. The structural design is ingenious. Similarly, the second airbag 170 can act as a driving mechanism for the movement of the rolling mechanism 180, saving the setting of the driving mechanism and ensuring the lightweight design requirements. In addition, in the initial state, the rolling mechanism 180 can also support the flexible membrane 110, increasing the support area of ​​the flexible membrane 110, thereby preventing the flexible membrane 110 from bending too much, which is not conducive to the subsequent bonding operation.

[0051] As an optional embodiment, the rolling mechanism 180 includes a hollow cylinder 181 hinged to the side wall of the slider 160, the side wall of the hollow cylinder 181 is connected to the second airbag 170, the hollow cylinder 181 is provided with a compression spring 182, the compression spring 182 is connected to a piston block 183 for sliding along the inner wall of the hollow cylinder 181, the piston block 183 is connected to a connecting rod 184 that movably extends out of one end of the hollow cylinder 181, the connecting rod 184 is connected to a bracket 185, the bracket 185 is movably connected to a rolling wheel 186, and the rolling wheel 186 is used to contact the bottom surface of the flexible membrane 110.

[0052] In this embodiment, when the second airbag 170 inflates and drives the hollow cylinder 181 to rotate outward, the piston block 183 can be driven to slide along the inner wall of the hollow cylinder 181 under the action of the compression spring 182, so that the connecting rod 184 drives the bracket 185 and the rolling wheel 186 to extend and retract, so that the rolling wheel 186 can always be close to the bottom surface of the flexible membrane 110, so that it can adaptively cooperate with the effective fitting of the flexible membrane 110 at different curvature positions in the curved area 122, further improving the fitting yield.

[0053] It should be noted that when the second airbag 170 is fully inflated, the hollow cylinder 181 rotates to the extreme position, at which time the rolling wheel 186 is separated from the flexible membrane 110 and the connecting rod 184 is extended to the longest position under the action of the compression spring 182 .

[0054] As an optional embodiment, an inflation assembly 190 is further included, which is used to directionally inflate the first airbag 150 or the second airbag 170. Since the first airbag 150 and the second airbag 170 need to be inflated separately, it is necessary to design an inflation assembly 190 that can be inflated in a direction to accommodate the need for independent inflation of the first airbag 150 and the second airbag 170.

[0055] As an optional embodiment, the inflation component 190 includes a first air pipe 191 connected to the first airbag 150. The first air pipe 191 passes through the bottom of the frame 140 and the lifting platform 130 and is connected to a four-way solenoid valve 192. The four-way solenoid valve 192 is connected to an air intake pipe 193 and two second air pipes 194. The air intake pipe 193 is used to connect to the air supply equipment. The second air pipe 194 movably passes through the lifting platform 130 and movably extends into the slider 160 to connect to the corresponding second airbag 170. The second air pipe 194 is a hose.

[0056] In this embodiment, after the air inlet pipe 193 is connected to the air supply equipment, when it is necessary to supply air only to the first airbag 150, only the first air pipe 191 is connected through the four-way solenoid valve 192; when it is necessary to inflate only the two second airbags 170, only the two second air pipes 194 are connected through the four-way solenoid valve 192, thereby realizing the requirement of directional inflation of the first airbag 150 and the second airbag 170. At the same time, the second air pipe 194 here is a hose, so that it can adapt to the movement of the slider 160 (a accommodating cavity for accommodating the second air pipe 194 can be opened inside the slider 160).

[0057] As an optional embodiment, a rounded corner 161 is formed on a side of the top of the slider 160 away from the frame 140 , and the curvature of the rounded corner 161 is the same as the curvature of the curved area 122 of the curved cover plate 120 .

[0058] In this embodiment, when the slider 160 slides and squeezes the flexible film 110 to fit the inner side of the curved cover 120, the design of the rounded corner 161 can prevent the slider 160 from scratching the flexible film 110, so as to ensure the surface quality of the flexible film 110. At the same time, the curvature of the rounded corner 161 is the same as the curvature of the curved area 122 of the curved cover 120, so that when the slider 160 slides to the extreme position, the rounded corner 161 on the top of the slider 160 just presses against the part of the curved area 122 connecting the straight area 121, thereby limiting the slider 160 and killing two birds with one stone.

[0059] As an optional embodiment, a telescopic cylinder 210 (a hydraulic cylinder can be used) is connected to the bottom of the lifting platform 130. The telescopic cylinder 210 can drive the lifting platform 130 to move up and down automatically, which is convenient for precise control of the stroke. A guide groove 131 is provided on the top of the lifting platform 130, which slides with the corresponding slider 160. A guide component that cooperates with the slider 160 can be provided in the guide groove 131, so that the sliding of the slider 160 is smoother.

[0060] Example 2

[0061] Reference Figure 1-Figure 7 This embodiment further provides a flexible film laminating method, based on a flexible film laminating device in the above embodiment, comprising the following steps:

[0062] Step S10: Install and fix the curved cover plate 120;

[0063] Step S20: placing the flexible film 110 with the OCA optical adhesive on top of the frame 140 , with the OCA optical adhesive facing upwards and close to the curved cover 120 ;

[0064] Step S30: capturing a status image of the flexible film 110 by an industrial camera; wherein the status image includes end surface profile information of the flexible film 110 and the curved cover plate 120;

[0065] Step S40: judging whether the flexible film 110 is symmetrically installed on the top of the frame 140 according to the status image;

[0066] Step S50: If not, adjust the installation position of the flexible film 110 until the flexible film 110 is symmetrically installed on the top of the frame 140; if so, move the lifting platform 130 upward so that the frame 140 can fit the middle area of ​​the flexible film 110 to the middle area of ​​the curved cover plate 120;

[0067] Step S60: Inflate the first airbag 150 at a preset inflation rate, so that the first airbag 150 expands and pushes the sliders 160 on both sides to slide along the top of the lifting platform 130. During the sliding process, the tops of the sliders 160 gradually adhere the flexible membrane 110 from the middle to the sides to the flat area 121 of the curved cover plate 120 until the first airbag 150 is fully inflated, and then stop inflating.

[0068] Step S70: Inflate the two second airbags 170 simultaneously at a preset inflation rate, so that the two second airbags 170 expand simultaneously and drive the corresponding rolling mechanisms 180 to rotate. During the rotation, one end of the rolling mechanism 180 gradually adheres the two side areas of the flexible membrane 110 to the curved surface area 122 of the curved cover plate 120. Inflation is stopped until the second airbags 170 are fully inflated.

[0069] Step S80 : After the first airbag 150 and the second airbag 170 are pressurized for a preset time, the lifting platform 130 is moved downward to complete the lamination of the flexible film 110 .

[0070] In this embodiment, when performing the bonding operation, the curved cover plate 120 is first installed and fixed, and then the flexible film 110 bonded with OCA optical glue is placed on the top of the frame 140. Then, to ensure the accuracy of subsequent bonding, the flexible film 110 needs to be symmetrically installed on the top of the frame 140. Here, the state image of the flexible film 110 is collected by an industrial camera to determine whether the flexible film 110 is symmetrically installed. Compared with manual or instrument measurement and recognition, the accuracy is higher. If asymmetry is identified, the installation position of the flexible film 110 needs to be adjusted until it is symmetrical, and then the lifting platform 130 is moved up so that the frame 140 fits the middle area of ​​the flexible film 110 to the middle area of ​​the curved cover plate 120, thereby first partially fitting and fixing the middle area of ​​the flexible film 110, and then inflating the first airbag 150 at a preset inflation rate, so that the first airbag 150 can expand and push the sliders 160 on both sides to slide along the top of the lifting platform 130. During the sliding process, the top of the slider 160 gradually fits the flexible film 110 from the middle to the sides to the straight area 121 of the curved cover plate 120. The method of gradually fitting from the middle of the flexible film 110 to the sides can help squeeze out bubbles from both sides, thereby It can effectively reduce the generation of bubbles and improve the bonding yield rate. The bonding of the flexible film 110 from the middle to both sides is carried out simultaneously. Compared with the unilateral bonding method, the bonding efficiency is higher. When the first airbag 150 is fully expanded, the inflation is stopped. At this time, the first airbag 150 can be close to the bottom surface of the flexible film 110 to maintain pressure. Then, the two second airbags 170 are inflated at the same time at a preset inflation rate, so that the two second airbags 170 are expanded at the same time and drive the corresponding rolling mechanism 180 to rotate. During the rotation, one end of the rolling mechanism 180 gradually bonds the two sides of the flexible film 110. As for the curved area 122 of the curved cover 120, due to the rolling contact of one end of the rolling mechanism 180 with the bottom surface of the flexible film 110 during the rotation, the rolling mechanism 180 gradually rolls the flexible film 110 outward to fit it to the curved area 122. The bonding process can squeeze out the bubbles. Finally, the first airbag 150 and the second airbag 170 can maintain the expansion for a period of time to maintain the pressure, so that the lifting platform 130 moves down to exit the pressing of the flexible film 110, and finally the flexible film 110 can be completely bonded to the inner side of the curved cover 120, thereby improving the overall bonding yield of the flexible film 110.

[0071] As an optional embodiment, in step S40, judging whether the flexible film 110 is symmetrically installed on the top of the frame 140 according to the state image includes:

[0072] Step S41: identifying the target endpoints 220 on both sides of the flexible film 110 and the reference endpoints 230 on both sides of the curved cover plate 120 according to the state image;

[0073] Step S42: identifying the actual distances between the target endpoint 220 and the adjacent reference endpoint 230 respectively;

[0074] Step S43 : determining whether the two actual distances are equal; if so, determining that the flexible film 110 is symmetrically installed on the top of the frame 140 ; ​​if not, determining that the flexible film 110 is asymmetrically installed on the top of the frame 140 .

[0075] In this embodiment, after the status image is collected, the target endpoints 220 on both sides of the flexible film 110 and the reference endpoints 230 on both sides of the curved cover plate 120 can be identified respectively. When the installation position of the flexible film 110 is asymmetrical, the position change characteristics of the target endpoint 220 are most obvious. At the same time, the position of the curved cover plate 120 is fixed and will not change. Therefore, the reference endpoints 230 on both sides of the curved cover plate 120 are used as reference points to calculate the actual distance between the target endpoint 220 and the adjacent reference endpoint 230. If the two actual distances are equal, it can be determined that the flexible film 110 is symmetrically installed on the top of the frame 140. Otherwise, it means that the flexible film 110 is asymmetrically installed on the top of the frame 140, resulting in the target endpoint 220 being located at a different position from the theoretical position. The two actual distances are ultimately measured to be unequal. Based on this measurement method, whether the flexible film 110 is symmetrically installed on the top of the frame 140 can be accurately and efficiently detected, providing a prerequisite for subsequent precise bonding.

[0076] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A flexible film laminating device for laminating a flexible film to the inner side of a curved cover plate, characterized in that: The lifting platform comprises a lifting platform, a frame is provided on the top of the lifting platform, the top of the frame is used to support the flexible membrane, an inflatable first airbag is provided in the frame, sliders are connected to both sides of the first airbag and are located on both sides of the frame, the sliders are slidably connected to the top of the lifting platform, the top surfaces of the sliders are flush with the top surface of the frame, the two sliders are used to slide simultaneously in a direction away from the frame under the action of the first airbag expansion, and the first airbag can be in close contact with the bottom surface of the flexible membrane when fully inflated; The first airbag is used to adhere the flexible membrane to the flat area of ​​the curved cover plate. The two sliders are each provided with an inflatable second airbag on the side away from the frame. When the second airbag is fully inflated, it can adhere both sides of the flexible membrane to the curved area of ​​the curved cover plate. A rolling mechanism is provided on the side of the two second airbags away from the slider. One end of the rolling mechanism is in rolling contact with the bottom surface of the flexible membrane, and the other end of the rolling mechanism is hinged to the side wall of the slider, and the hinge position is located below the second airbag.

2. A flexible film laminating device according to claim 1, characterized in that: The rolling mechanism includes a hollow cylinder hinged to the side wall of the slider, the side wall of the hollow cylinder is connected to the second airbag, the hollow cylinder is provided with a compression spring, the compression spring is connected to a piston block for sliding along the inner wall of the hollow cylinder, the piston block is connected to a connecting rod movably extending out of one end of the hollow cylinder, the connecting rod is connected to a bracket, the bracket is movably connected to a rolling wheel, and the rolling wheel is used to contact the bottom surface of the flexible membrane.

3. The flexible film laminating device according to claim 1, wherein: Also included is an inflation component for directionally inflating the first airbag or the second airbag.

4. A flexible film laminating device according to claim 3, characterized in that: The inflation assembly includes a first air pipe connected to the first airbag. The first air pipe passes through the bottom of the frame and the lifting platform and is connected to a four-way solenoid valve. The four-way solenoid valve is connected to an air intake pipe and two second air pipes. The air intake pipe is used to connect to the air supply equipment. The second air pipe movably passes through the lifting platform and movably extends into the slider to connect to the corresponding second airbag. The second air pipe is a hose.

5. The flexible film laminating device according to claim 1, wherein: A rounded corner is provided on a side of the top of the slider away from the frame, and the curvature of the rounded corner is the same as the curvature of the curved surface area of ​​the curved cover plate.

6. The flexible film laminating device according to claim 1, wherein: The bottom of the lifting platform is connected with a telescopic cylinder, and the top of the lifting platform is provided with a guide groove that slides with the corresponding sliding block.

7. A flexible film laminating method, characterized in that: A flexible film laminating device according to claim 1 or 2, comprising the following steps: Install and fix the curved cover; Place the flexible film with OCA optical adhesive on top of the frame, with the OCA optical adhesive facing upwards and close to the curved cover plate; The state image of the flexible film is collected by an industrial camera; wherein the state image includes the end face profile information of the flexible film and the curved cover plate; According to the status image, determine whether the flexible membrane is symmetrically installed on the top of the frame; If not, adjust the installation position of the flexible membrane until the flexible membrane is symmetrically installed on the top of the frame; If yes, move the lifting platform upwards so that the frame fits the middle area of ​​the flexible membrane to the middle area of ​​the curved cover plate; Inflate the first airbag at a preset inflation rate, so that the first airbag expands and pushes the two sliders to slide along the top of the lifting platform. During the sliding process, the top of the slider gradually adheres the flexible membrane from the middle to the sides to the flat area of ​​the curved cover plate until the first airbag is fully inflated, and then stop inflating; The two second airbags are inflated simultaneously at a preset inflation rate, so that the two second airbags expand simultaneously and drive the corresponding rolling mechanisms to rotate. During the rotation process, one end of the rolling mechanism gradually fits the two side areas of the flexible membrane to the curved surface area of ​​the curved cover plate until the second airbags are fully inflated and the inflation is stopped; After the first airbag and the second airbag are pressurized for a preset time, the lifting platform is moved downward to complete the lamination of the flexible film.

8. A flexible film laminating method according to claim 7, characterized in that: According to the status image, determine whether the flexible membrane is symmetrically installed on the top of the frame, including: According to the state image, the target endpoints on both sides of the flexible membrane and the reference endpoints on both sides of the curved cover plate are identified; Respectively identify the actual distances between the target endpoint and the adjacent reference endpoints; It is determined whether the two actual distances are equal. If so, it is determined that the flexible membrane is symmetrically installed on the top of the frame. If not, it is determined that the flexible membrane is asymmetrically installed on the top of the frame.

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