Curved screen pasting tool and method

Abstract

The application relates to a curved screen pasting tool, which comprises a base, a tensioning device and further comprises: a suction platform for fixing a curved cover plate; a pressing jig for pressing a flexible film on the curved cover plate, the pressing jig comprises a base fixed on the base and a flexible body in sealing connection with the base, the flexible body and the base enclose a pressing cavity, and the base is provided with a fluid channel in communication with the pressing cavity; wherein during the process that the pressing jig approaches the suction platform, the volume of the pressing cavity changes and the pressure in the pressing cavity remains unchanged so that the flexible film gradually adheres to the curved cover plate from the center to the periphery. The application can avoid the problems of air bubbles and wrinkles in the pasting process, thereby improving the pasting quality of the curved screen.

Description

Technical Field

[0001] This invention relates to the field of curved screen lamination technology, and in particular to a curved screen bonding fixture and method. Background Technology

[0002] With the development of flexible screens, flexible displays are appearing in more and more display fields, and display panels are also taking on curved shapes, giving rise to a variety of curved display products. Among them, automotive products are also researching curved and irregularly shaped display structures, but this places higher demands on the manufacturing and bonding of curved cover plates. Because it is a curved display, conventional bonding methods are no longer sufficient, requiring a new way to bond the flexible film and the curved cover plate. Previous bonding methods were all planar, and no relatively mature curved bonding solution existed. Directly using a rigid planar method for curved bonding resulted in products with significant air bubbles and wrinkles.

[0003] Therefore, there is an urgent need to develop a new tooling for bonding curved screens to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a curved screen bonding fixture and method.

[0005] In a first aspect, this application provides a curved screen bonding fixture, the technical solution of which is as follows: A curved screen bonding fixture includes a base, and further includes: an adsorption platform for fixing a curved cover plate; a pressing fixture for pressing a flexible film onto the curved cover plate, the pressing fixture including a base fixed on the base and a flexible body sealed to the base, the flexible body and the base forming a pressing cavity, the base having a fluid channel communicating with the pressing cavity; a tensioning device for placing the flexible film before it is bonded to the curved cover plate; wherein, as the pressing fixture approaches the adsorption platform, the volume of the pressing cavity changes while the pressure inside the pressing cavity remains constant, so that the flexible film gradually bonds to the curved cover plate from the center outwards.

[0006] By adopting the above technical solution, the pressing fixture applies force to the flexible membrane through fluid within the flexible body, bonding the flexible membrane to the curved cover plate. This results in more uniform bonding between the flexible membrane and the pressing fixture, and fewer air bubbles and wrinkles on the curved cover plate. This solution can achieve bonding of the flexible membrane to both the concave and convex sides of a curved screen, solving the problem of existing technologies that cannot bond curved films or can only bond one side of a curved screen. When bonding the membrane to the concave side of the curved cover plate, as the pressing fixture approaches the adsorption platform, fluid is gradually introduced into the pressing cavity to allow the flexible membrane to gradually bond with the curved cover plate from the center outwards. This process allows air bubbles to be expelled, resulting in a tighter bond. When bonding the membrane to the convex side of the curved cover plate, as the pressing fixture approaches the adsorption platform, fluid is gradually discharged from the pressing cavity to allow the flexible membrane to gradually bond with the curved cover plate from the center outwards. This process also allows air bubbles to be expelled, resulting in a tighter bond.

[0007] In a further embodiment, the tensioning device is used to tension the flexible membrane with a constant tension before the pressing fixture presses the flexible membrane onto the curved cover plate. Before the flexible membrane is attached to the curved cover plate, the tensioning device tensions the flexible membrane. When the flexible membrane comes into contact with the flexible body, the tensioning device relaxes the flexible membrane, causing the flexible membrane to arch towards the adsorption platform. During the process of the pressing fixture attaching the flexible membrane to the curved cover plate, the tensioning device simultaneously moves closer to the flexible body.

[0008] By adopting the above technical solution, the tension of the tensioning device remains constant, allowing the flexible membrane to maintain the same tension regardless of its position on the curved surface of the bonding fixture. When the flexible membrane contacts the flexible body, the tensioning device relaxes the flexible membrane, causing it to arch towards the adsorption platform. This ensures that the central portion of the flexible membrane is more easily bonded to the curved cover plate first. During the process of the flexible membrane bonding to the curved surface of the bonding fixture, the tension is neither too high and deformed, nor too low and wrinkled, ensuring that the tension of the flexible membrane remains the same at different positions on the surface of the bonding fixture.

[0009] In a further embodiment, a support member communicating with a fluid channel is provided within the pressing cavity. The end of the support member away from the base is provided with an outlet communicating with the fluid channel, which is used to guide the fluid entering through the fluid channel into the pressing cavity. A first rib is provided on the outer periphery of the support member and is fixed integrally with the base. A second rib is provided inside the flexible body outside the first rib. The second rib covers the outside of the first rib, and a flow channel is left between the second rib and the first rib so that the fluid flowing out of the outlet can fill the pressing cavity.

[0010] By adopting the above technical solution, fluid is first filled into the center of the pressing cavity. The flexible body in the center of the pressing cavity is filled with fluid first and then diffuses to the surrounding area. This ensures that the center of the flexible membrane first contacts and adheres to the curved cover plate and then gradually adheres to the surrounding area. It can also expel the residual air in the flexible membrane attached to the surface of the pressing fixture from the surrounding area of ​​the pressing fixture, reducing the generation of air bubbles. The pressing fixture with the flexible membrane can better adhere the flexible membrane to the curved cover plate, resulting in higher quality adhesion of the flexible membrane to the curved cover plate.

[0011] In a further embodiment, the adsorption platform is provided with a limiting part that defines the curved cover plate.

[0012] By adopting the above technical solutions, the stability of the curved cover plate during the film application process can be guaranteed, as well as the consistency of batch film application of the curved cover plate.

[0013] In a further embodiment, the adsorption platform is equipped with a negative pressure device, and after the curved cover plate is positioned on the adsorption platform, the negative pressure device adsorbs and fixes the curved cover plate.

[0014] By adopting the above technical solution, the curved cover plate can be quickly and reliably fixed to the adsorption platform, ensuring reliability and improving production efficiency.

[0015] A further embodiment also includes a motor, which is used to control the tensioning device to tighten or loosen the flexible membrane.

[0016] By adopting the above technical solutions, the tension of the flexible film can be controlled more precisely by using a servo motor. The amplitude and nodes of the flexible film arching can also be controlled during the bonding process, which can achieve automated control and higher production efficiency and consistency.

[0017] A further embodiment involves the following steps during the bonding process between the flexible membrane and the curved cover plate: when the flexible body and the curved cover plate are pressed together, the volume of the pressing cavity decreases and the fluid in the pressing cavity is discharged through the fluid channel; when the flexible body and the curved cover plate are separated, the volume of the pressing cavity increases and the fluid enters the pressing cavity through the fluid channel, thereby maintaining a constant pressure within the pressing cavity.

[0018] By adopting the above technical solutions, the flatness and overall tension of the flexible membrane are improved.

[0019] A further embodiment includes a pressure-balancing device connected to the fluid channel, the pressure-balancing device being used to regulate the flow of fluid into or out of the compression chamber to maintain a constant pressure within the compression chamber.

[0020] By adopting the above technical solution, the probability of deformation or damage to the curved cover plate can be reduced during the flexible film lamination process, as the pressing fixture and the curved cover plate get closer and closer, the pressure in the pressing cavity is squeezed and the pressure continuously increases.

[0021] Secondly, this application provides a method for bonding curved screens, which is applicable to the technical solution described above, and includes the following steps:

[0022] Preparation: Install the curved cover plate onto the adsorption platform;

[0023] Film mounting: Installing the flexible film onto the tensioning device;

[0024] Mold closing: The adsorption platform gradually approaches the pressing fixture;

[0025] Flexible membrane deformation: When the flexible membrane comes into contact with the flexible body, the tensioning device relaxes the flexible membrane, causing the flexible membrane to arch towards the adsorption platform;

[0026] Fluid filling: During the process of the pressing fixture approaching the adsorption platform, fluid is filled into the pressing cavity through the fluid channel. The fluid pushes the flexible body to move so that the flexible membrane gradually adheres to the curved cover plate from the center to the periphery.

[0027] Adhesion: During the process of the flexible body pushing the flexible membrane to adhere to the curved cover plate, the pressure inside the pressing cavity remains constant;

[0028] Separation: The fluid in the pressing cavity is discharged from the fluid channel, and the flexible body detaches from the flexible membrane;

[0029] Separation: The adsorption platform and the pressing fixture gradually separate;

[0030] Removal: Remove the curved cover plate with the flexible membrane attached from the adsorption platform.

[0031] By adopting the above technical solution, the flexible film can be bonded first in the middle and then gradually towards the periphery during the upward arching deformation under the action of the tensioning device before bonding. This reduces the generation of air bubbles during the bonding process and ensures that the flexible film can effectively adhere to the surface of the pressing fixture. Maintaining constant pressure within the pressing cavity reduces the probability of damage to the curved cover plate.

[0032] Thirdly, this application provides another method for bonding curved screens, including the following steps:

[0033] Preparation: Install the curved cover plate onto the adsorption platform;

[0034] Film mounting: The flexible film is mounted on the tensioning device;

[0035] Fluid filling: Fluid is filled into the pressing cavity through the fluid channel;

[0036] Mold closing: The adsorption platform and the pressing fixture gradually approach each other until the flexible membrane and the curved cover plate come into contact;

[0037] Center fit: The flexible body pushes the flexible membrane to fit the center of the curved cover plate;

[0038] Peripheral bonding: As the adsorption platform and the pressing fixture continue to approach each other, the flexible body pushes the flexible membrane and the curved cover plate to gradually bond from the center to the periphery. The fluid in the pressing cavity is discharged through the fluid channel. During the bonding process, the pressure in the pressing cavity remains constant.

[0039] Separation: After the flexible membrane is fully bonded to the curved cover plate, the flexible body detaches from the flexible membrane;

[0040] Separation: The adsorption platform gradually separates from the pressing fixture;

[0041] Removal: Remove the curved cover plate with the flexible membrane attached from the adsorption platform.

[0042] By adopting the above technical solution, the flexible film on the outer side of the curved cover can be bonded. During the bonding process, the flexible film is bonded in the middle first by controlling the fluid to be discharged gradually. As the fluid is continuously discharged from the pressing cavity, the adsorption platform gradually fills the pressing cavity from the center to the surrounding area. The pressing process is controlled by the flow of fluid, which can realize the bonding of the flexible film on the outer curved surface of the curved cover with high efficiency and good product consistency.

[0043] In summary, due to the adoption of the above technical solutions, this application has at least one of the following beneficial effects:

[0044] 1. The curved screen lamination fixture of this application maintains a constant tension in the tensioning device, resulting in more uniform adhesion between the flexible film and the pressing fixture, and fewer air bubbles and wrinkles on the curved cover plate. Fluid is filled into the pressing cavity to allow the flexible film to gradually adhere to the curved cover plate from the center outwards. This process allows air bubbles to be expelled, resulting in a tighter fit, ensuring the stability of the curved cover plate during lamination, and improving the consistency of batch lamination of curved cover plates.

[0045] 2. In the curved screen bonding fixture of this application, fluid is first filled into the center of the pressing cavity, and then the fluid diffuses outward from the flexible body in the center of the pressing cavity. This ensures that the pressure on different positions of the flexible membrane adhering to the surface of the pressing fixture remains the same, allowing for better adhesion of the flexible membrane to the curved cover plate.

[0046] 3. The curved screen bonding fixture of this application has a constant pressure device to ensure that the pressure in the bonding cavity remains constant, thereby reducing the probability of deformation or damage to the curved cover plate during the flexible film bonding process.

[0047] 4. The curved screen bonding method of this application reduces the generation of air bubbles during the bonding process, ensuring that the flexible film can effectively adhere to the surface of the pressing fixture. Maintaining constant pressure within the pressing cavity reduces the probability of defects in the curved cover plate, resulting in good consistency and high production efficiency in mass production. Furthermore, it can also achieve flexible film bonding to the outer curved surface of the curved cover plate with high efficiency and good product consistency. Attached Figure Description

[0048] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0049] Figure 1 This is a schematic diagram of the structure of one embodiment of the curved screen bonding tooling of this application.

[0050] Figure 2 This is an exploded structural diagram of Embodiment 1 of the curved screen bonding tooling of this application.

[0051] Figure 3 This is a three-dimensional cross-sectional structural diagram of the curved screen bonding tooling embodiment one of this application.

[0052] Figure 4 This is a cross-sectional structural schematic diagram of Embodiment 2 of the curved screen bonding tooling of this application.

[0053] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0054] Figure 6 This is a schematic diagram of the structure of Embodiment 3 of the curved screen bonding tooling of this application.

[0055] Figure 7 This is an exploded structural diagram of Embodiment 3 of the curved screen bonding tooling of this application.

[0056] Figure 8 This is a three-dimensional cross-sectional structural diagram of Embodiment 3 of the curved screen bonding tooling of this application.

[0057] Figure 9 This is a cross-sectional structural schematic diagram of Embodiment 4 of the curved screen bonding tooling of this application.

[0058] Figure 10 yes Figure 9 Enlarged diagram of point B in the middle.

[0059] Figure label:

[0060] 1. Adsorption platform; 11. Upper mold; 12. Template; 13. Air inlet; 2. Pressing fixture; 21. Tensioning device; 22. Guide rail; 23. Base; 231. Fluid channel; 232. Support component; 233. First rib; 234. Outlet; 24. Flexible body; 241. Pressing cavity; 242. Second rib; 243. Flow channel; 25. Pressure balancing device; 3. Base; 4. Flexible membrane; 5. Cover plate; 6. Pad plate. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0062] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0063] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "curved screen bonding fixture includes" or "curved screen bonding fixture contains" mean that the elements or objects preceding "curved screen bonding fixture includes" or "curved screen bonding fixture contains" encompass the elements or objects listed following "curved screen bonding fixture includes" or "curved screen bonding fixture contains," and their equivalents, but do not exclude other elements or objects. The terms “center,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “inner,” and “outer” are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. They are only for the purpose of facilitating the description of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0064] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0065] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0066] Example 1:

[0067] Please see Figures 1-3 The diagram shows a structural schematic of one embodiment of the curved screen bonding fixture.

[0068] Please see Figure 1 and Figure 2 The curved screen bonding fixture includes a base 3, an adsorption platform 1, and a pressing fixture 2. A pad 6 and a base 23 are fixed on the base 3. A flexible body 24, which is convex in shape, is sealed and connected to the base 23. Guide rails 22 are mounted on both sides of the base 23 on the pad 6. The adsorption platform 1 includes a template 12 and an upper mold 11 fixed to the template 12. The upper mold 11 is used to fix the curved cover plate 5, which is located between the upper mold 11 and the flexible body 24. The template 12 has an air intake 13 for adsorbing the curved cover plate 5 onto the upper mold 11. The upper mold 11 has an convex structure for bonding the flexible film 4 to the outer arc surface of the curved panel.

[0069] The base 23 has tensioning devices 21 that are slidably connected to the guide rail 22 on both sides, and the flexible membrane 4 is placed on the tensioning devices 21. The tensioning devices 21 are connected to a motor or cylinder, and the motor or cylinder drives the two opposing tensioning devices 21 on both sides of the base 23 to move closer to or further away from each other.

[0070] There are two implementation schemes for the tensioning device 21. In the first implementation scheme, the flexible film 4 is freely placed in the positioning groove between the two tensioning devices 21, and the position of the tensioning device 21 remains unchanged during the bonding process of the flexible film 4.

[0071] In the second implementation scheme, the tensioning device 21 applies a constant tension to the flexible membrane 4 before the pressing fixture 2 presses the flexible membrane 4 onto the curved cover plate 5. Before the flexible membrane 4 is attached to the curved cover plate 5, the tensioning device 21 tightens the flexible membrane 4. When the flexible membrane 4 comes into contact with the flexible body 24, the tensioning device 21 relaxes the flexible membrane 4, causing the flexible membrane 4 to arch towards the adsorption platform 1. During the process of the pressing fixture 2 attaching the flexible membrane 4 to the curved cover plate 5, the tensioning device 21 simultaneously approaches the flexible body 24.

[0072] Please see Figure 3 The diagram shows a three-dimensional cross-sectional view of an embodiment of the curved screen bonding fixture. A pressing cavity 241 is sealed between the flexible body 24 and the base 23. The pressing cavity 241 is connected to a pressure balancing device 25 through a fluid channel 231. The pressure balancing device 25 is used to regulate the flow of fluid into and out of the pressing cavity 241 to maintain a constant pressure within the pressing cavity 241. During the bonding process between the flexible membrane 4 and the curved cover plate 5, when the flexible body 24 and the curved cover plate 5 are pressed together, the volume of the pressing cavity 241 decreases and the fluid in the pressing cavity 241 is discharged through the fluid channel 231. When the flexible body 24 and the curved cover plate 5 are separated, the volume of the pressing cavity 241 increases and fluid enters the pressing cavity 241 through the fluid channel 231, thus maintaining a constant pressure within the pressing cavity 241. As the pressing fixture 2 approaches the adsorption platform 1, the volume of the pressing cavity 241 changes while the pressure inside the pressing cavity 241 remains constant, so that the flexible membrane 4 gradually adheres to the curved cover plate 5 from the center outwards.

[0073] The working process of this embodiment is as follows: The pressure balancing device 25 controls the flow of fluid in and out of the pressing chamber 241 to maintain a set constant pressure in the pressing chamber 241. The motor drives the tensioning device 21 to slide along the guide rail 22 to a suitable position so that the flexible membrane 4 is placed precisely between the two tensioning devices 21. The template 12 moves the upper mold 11 and the curved cover plate 5 adsorbed by the upper mold 11 closer to the flexible membrane 4. During the process of the upper mold 11 contacting the flexible membrane 4 and pressing down on the flexible body 24, the middle part of the flexible membrane 4 first contacts and adheres to the curved panel. As the pressure balancing device 25 moves, the fluid in the pressing chamber 241 flows out through the fluid channel 231, and the flexible body 24 gradually deforms and concaves. The flexible membrane 4 gradually adheres to the curved cover plate 5 from the center to the periphery. After adhesion, the template 12 moves away from the flexible body 24 with the panel adsorbed by the upper mold 11 and the flexible membrane 4. The pressure balancing device 25 works to continuously allow fluid to enter the pressing chamber 241, and the flexible body 24 restores its convex shape.

[0074] Example 2:

[0075] Please see Figure 4 and Figure 5The difference from Embodiment 1 is that a support member 232 communicating with a fluid channel 231 is provided in the pressing cavity 241. The end of the support member 232 away from the base 23 is provided with an outlet 234 communicating with the fluid channel 231. The outlet 234 is used to guide the fluid entering through the fluid channel 231 into the pressing cavity 241. A first rib 233 is provided on the outer periphery of the support member 232 and is fixed integrally with the base 23. A second rib 242 is provided inside the flexible body 24 outside the first rib 233. The second rib 242 covers the outside of the first rib 233, and a flow channel 243 is left between the second rib 242 and the first rib 233 so that the fluid flowing out of the outlet 234 can fill the pressing cavity 241.

[0076] The working process of this embodiment differs from that of Embodiment 1 in that, by controlling the instantaneous flow rate of the fluid entering the pressing cavity, the fluid first fills the space enclosed by the first rib 233 and the second rib 242 of the pressing cavity 241 through the fluid channel 231. During the process of filling the space enclosed by the first rib 233 and the second rib 242, the fluid overflows from the flow channel 243 to fill the entire pressing cavity 241. In this embodiment, fluid can be injected into the pressing cavity 241 only when the curved cover plate 5 contacts the flexible membrane 4 during the flexible membrane 4 bonding process. Because the support member 232 is located at the center of the pressing cavity 241, the flexible membrane 4 first contacts the cover plate 5 from the middle and then gradually bonds to the surrounding area during the bonding process.

[0077] Example 3:

[0078] Please see Figures 6-8 The difference from Embodiment 1 is that the upper mold 11 is concave in shape and is used to attach the flexible film 4 to the concave surface of the curved cover plate 5.

[0079] The difference between the working process of this embodiment and that of embodiment one is that before the upper mold 11 approaches the flexible film 4 and contacts the flexible film 4, the tensioning device 21 moves closer to each other under the drive of a motor or cylinder so that the center of the flexible film 4 protrudes toward the curved cover plate 5. Thus, during the bonding process of the flexible film 4 and the curved cover plate 5, the center position of the flexible film 4 can be bonded to the curved cover plate 5 first.

[0080] Example 4:

[0081] Please see Figure 9 and Figure 10 The difference from Embodiment 2 is that the upper mold 11 is concave in shape and is used to attach the flexible film 4 to the concave surface of the curved cover plate 5.

[0082] The difference between the working process of this embodiment and that of embodiment two is that, before the upper mold 11 approaches the flexible film 4 and contacts the flexible film 4, the tensioning device 21 moves closer to each other under the drive of a motor or cylinder so that the center of the flexible film 4 protrudes toward the curved cover plate 5. Thus, during the bonding process of the flexible film 4 and the curved cover plate 5, the center position of the flexible film 4 can be bonded to the curved cover plate 5 first.

[0083] Example 5:

[0084] This embodiment discloses a method for bonding curved screens, including the following steps:

[0085] Preparation: Install the curved cover plate 5 onto the adsorption platform 1;

[0086] Film mounting: Install the flexible film 4 onto the tensioning device 21;

[0087] Mold closing: The adsorption platform 1 and the pressing fixture 2 gradually approach each other;

[0088] Deformation of flexible membrane 4: When the flexible membrane 4 comes into contact with the flexible body 24, the tensioning device 21 relaxes the flexible membrane 4, causing the flexible membrane 4 to arch towards the adsorption platform 1;

[0089] Fluid filling: During the process of pressing fixture 2 approaching adsorption platform 1, fluid is filled into pressing cavity 241 through fluid channel 231. The fluid pushes the flexible body 24 to move so that the flexible membrane 4 gradually adheres to the curved cover plate 5 from the center to the periphery.

[0090] Adhesion: During the process of flexible body 24 pushing flexible membrane 4 to adhere to curved cover plate 5, the pressure in pressing cavity 241 remains unchanged;

[0091] Separation: The fluid in the pressing cavity 241 is discharged from the fluid channel 231, and the flexible body 24 is separated from the flexible membrane 4;

[0092] Separation: The adsorption platform 1 and the pressing fixture 2 are gradually separated;

[0093] Removal: Remove the curved cover plate 5 with the flexible membrane 4 attached from the adsorption platform 1.

[0094] Example 6:

[0095] This embodiment discloses another method for bonding curved screens, including the following steps:

[0096] Preparation: Install the curved cover plate 5 onto the adsorption platform 1;

[0097] Film mounting: The flexible film 4 is mounted on the tensioning device 21;

[0098] Fluid filling: Fluid is filled into the pressing cavity 241 through the fluid channel 231;

[0099] Mold closing: The adsorption platform 1 and the pressing fixture 2 gradually approach each other until the flexible membrane 4 and the curved cover plate 5 come into contact;

[0100] Center fit: The flexible body 24 pushes the flexible membrane 4 to fit the center of the curved cover plate 5;

[0101] Peripheral bonding: As the adsorption platform 1 and the pressing fixture 2 continue to approach each other, the flexible body 24 pushes the flexible membrane 4 and the curved cover plate 5 to gradually bond from the center to the periphery. The fluid in the pressing cavity 241 is discharged through the fluid channel 231. During the bonding process, the pressure in the pressing cavity 241 remains unchanged.

[0102] Separation: After the flexible membrane 4 is fully attached to the curved cover plate 5, the flexible body 24 detaches from the flexible membrane 4;

[0103] Separation: The adsorption platform 1 and the pressing fixture 2 gradually separate;

[0104] Removal: Remove the curved cover plate 5 with the flexible membrane 4 attached from the adsorption platform 1.

[0105] Other implementation methods

[0106] The fluid injected into the pressing cavity 241 is either liquid or gas.

[0107] The upper mold 11 can generate negative pressure by venting the internal air during the placement of the curved cover plate 5, thereby adsorbing the curved cover plate 5 onto the adsorption platform 1. It can also be fixed to the adsorption platform 1 by adhesive or magnetic attraction.

[0108] During operation, the upper mold 11 can move, the base 3 can move, or both can move together to move closer or further away.

[0109] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A curved screen pasting tooling, comprising a base, characterized in that, Also comprising: an adsorption platform for fixing the curved cover plate; a pressing jig for pressing the flexible film on the curved cover plate, the pressing jig comprising a base fixed on the base and a flexible body in sealing connection with the base, the flexible body and the base enclosing a pressing cavity, the base being provided with a fluid channel communicating with the pressing cavity; a tensioning device for placing the flexible film before the flexible film is attached to the curved cover plate; wherein the volume of the pressing cavity changes and the pressure in the pressing cavity remains constant when the pressing jig approaches the adsorption platform, so that the flexible film gradually attaches to the curved cover plate from the center to the periphery; a support communicating with the fluid channel is arranged in the pressing cavity, the end of the support away from the base is provided with an outlet communicating with the fluid channel, the outlet is used to guide the fluid entering the fluid channel into the pressing cavity; a first protruding rib is arranged on the outer periphery of the support and fixed integrally with the base, a second protruding rib is arranged outside the first protruding rib in the flexible body, the second protruding rib is buckled outside the first protruding rib, and a flow channel is left between the second protruding rib and the first protruding rib so that the fluid flowing out of the outlet can fill the pressing cavity.

2. The curved screen pasting tooling apparatus of claim 1, wherein, The tensioning device is used to tension the flexible film with constant tension before the pressing jig presses the flexible film on the curved cover plate. Before the flexible film is attached to the curved cover plate, the tensioning device tensions the flexible film. When the flexible film contacts the flexible body, the tensioning device relaxes the flexible film to make the flexible film arch towards the adsorption platform. When the pressing jig makes the flexible film attach to the curved cover plate, the tensioning device approaches the flexible body synchronously.

3. The curved screen fitting tool of claim 1, wherein, The adsorption platform is provided with a limiting part defining the curved cover plate.

4. The curved screen pasting tooling of claim 3, wherein, The adsorption platform is provided with a negative pressure device. After the curved cover plate is defined in the adsorption platform, the negative pressure device adsorbs and fixes the curved cover plate.

5. The curved screen pasting tooling of claim 2, wherein, Also comprising a motor for controlling the tensioning device to tension or relax the flexible film.

6. The curved screen pasting tooling of claim 1, wherein, During the process of attaching the flexible film to the curved cover plate, when the volume of the pressing cavity decreases and the fluid in the pressing cavity is discharged through the fluid channel during the pressing process of the flexible body and the curved cover plate, and when the volume of the pressing cavity increases and the fluid enters the pressing cavity through the fluid channel during the separation process of the flexible body and the curved cover plate, the pressure in the pressing cavity remains constant.

7. The curved screen pasting tooling of claim 6, wherein, A pressure balancing device connected with the fluid channel is included, which is used to adjust the fluid entering or discharging the pressing cavity to keep the pressure in the pressing cavity constant.

8. A curved screen pasting method suitable for the curved screen pasting tooling according to any one of claims 1-7, characterized in that, The method comprises the following steps: preparation: installing the curved cover plate on the adsorption platform; film installation: installing the flexible film on the tensioning device; mold closing: the adsorption platform and the pressing jig gradually approach; flexible film deformation: when the flexible film contacts the flexible body, the tensioning device relaxes the flexible film to make the flexible film arch towards the adsorption platform; fluid filling: during the approach of the pressing jig to the adsorption platform, fluid is filled into the pressing cavity through the fluid channel, and the fluid pushes the flexible body to move so that the flexible film gradually attaches to the curved cover plate from the center to the periphery; fitting: the flexible body pushes the flexible film to fit with the curved cover plate, the pressure in the pressing cavity keeps constant; separation: the fluid in the pressing cavity is discharged from the fluid channel, the flexible body separates from the flexible film; mold separation: the adsorption platform and the pressing fixture gradually separate; parting: the curved cover plate with the flexible film is taken off from the adsorption platform.

9. A curved screen pasting method, suitable for the curved screen pasting tooling according to any one of claims 1-7, characterized in that, the steps include: preparation: the curved cover plate is installed on the adsorption platform; film installation: the flexible film is installed on the tensioning device; fluid filling: the pressing cavity is filled with fluid through the fluid channel; mold closing: the adsorption platform and the pressing fixture gradually close to make the flexible film contact with the curved cover plate; center fitting: the flexible body pushes the flexible film to fit with the center of the curved cover plate; peripheral fitting: the adsorption platform and the pressing fixture continue to close, the flexible body pushes the flexible film to fit with the curved cover plate from the center to the periphery, the fluid in the pressing cavity is discharged through the fluid channel, and the pressure in the pressing cavity keeps constant during the fitting process; separation: after the flexible film completely fits with the curved cover plate, the flexible body separates from the flexible film; mold separation: the adsorption platform and the pressing fixture gradually separate; parting: the curved cover plate with the flexible film is taken off from the adsorption platform.

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