Curved surface laminating equipment and curved surface laminating method

Abstract

The invention provides curved surface laminating equipment and a curved surface laminating method, and relates to the technical field of laminating equipment. Comprising an upper laminating mechanism and a lower laminating mechanism, and an elastic flexible grabbing mechanism used for installing flexible laminating materials is arranged in an upper cavity; an elastic driving piece is arranged between the flexible material grabbing mechanism and the upper cavity, the elastic driving piece is suitable for forming a positive pressure cavity with the upper cavity, and the positive pressure cavity is connected with a first vacuum device and an inflation device; the air inflation device is configured to inflate the positive pressure chamber to form positive pressure before lamination, so that the flexible lamination material deforms towards the lower cavity, and the flexible lamination material is gradually laminated with the curved surface material; the device has the advantages that the attaching force can be accurately controlled, uniform attaching of the flexible attaching material and the curved surface material is achieved, and bubbles are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of bonding equipment technology, and more specifically, to a curved surface bonding equipment and a curved surface bonding method. Background Technology

[0002] Current methods for laminating films or flexible sheets onto curved products typically involve bonding a flat surface to a convex surface or vice versa. This traditional method has several problems: First, the bonding force is difficult to control precisely, easily leading to uneven or over-bonding, thus affecting product quality. Second, due to the complexity of curved surfaces, the degree of bonding cannot be effectively guaranteed, easily resulting in loose bonding or partial separation. Furthermore, air bubbles are easily generated during the bonding process, affecting the product's appearance and performance. These problems are particularly prominent in fields with high bonding quality requirements, such as precision electronic equipment, automotive interiors, and medical devices. Existing technologies lack a curved surface bonding solution that effectively addresses these issues; therefore, there is an urgent need for a curved surface bonding device and method that achieves high precision, airtightness, and controllable bonding force. Summary of the Invention

[0003] The purpose of this application is to provide a curved surface bonding device and a curved surface bonding method, which has the advantages of being able to precisely control the bonding force, achieve uniform bonding of flexible bonding materials and curved surface materials, and effectively reduce the generation of air bubbles.

[0004] The present invention adopts the following solution: A curved surface bonding device includes: an upper bonding mechanism and a lower bonding mechanism, wherein, The upper bonding mechanism includes an upper cavity, in which a flexible material gripping mechanism for mounting flexible bonding materials is provided; an elastic driving member is provided between the flexible material gripping mechanism and the upper cavity, the elastic driving member being adapted to form a positive pressure chamber with the upper cavity, and the positive pressure chamber is connected to a first vacuum device and an inflation device. The lower bonding mechanism includes a lower cavity adapted to be coupled to the upper cavity to form a partially enclosed cavity, and a second vacuum device connected to the lower cavity; a mounting fixture is provided in the lower cavity to mount curved materials, and a lifting module is provided below the mounting fixture to drive the mounting material to move toward the flexible bonding material during bonding; The first vacuum device and the second vacuum device are configured to simultaneously evacuate the space above and below the flexible material gripping mechanism to form a negative pressure space before bonding; and the first vacuum device and the second vacuum device simultaneously evacuate the positive pressure chamber and the lower chamber to a vacuum difference not exceeding a preset threshold before bonding, so as to control the silicone sheet to not undergo significant deformation during the vacuuming stage. The inflation device is configured to inflate the positive pressure chamber before bonding to create positive pressure, thereby driving the elastic drive member to deform toward the lower chamber, thereby causing the flexible material gripping mechanism and the flexible bonding material to gradually bond with the curved material along a path from the center to the periphery.

[0005] Furthermore, the flexible material gripping mechanism includes an adhesive leather mesh for adhering the flexible bonding material, the four sides of which are connected to the mesh frame by elastic bands; the lower plane of the mesh frame is adapted to be sealed to the lower cavity during bonding; the elastic drive member is a deformable silicone sheet disposed on the upper side of the leather mesh, the silicone sheet is adapted to divide the upper cavity into a lower chamber and a positive pressure chamber, and a breathable support plate is disposed in the positive pressure chamber to limit the upper deformation stroke of the silicone sheet; the silicone sheet is adapted to deform in the direction of the leather mesh when positive pressure is formed in the positive pressure chamber, and act on the leather mesh to make the flexible bonding material gradually bond with the curved material from the middle area to the surrounding areas.

[0006] Furthermore, the silicone sheet is fixed to the upper cavity by an upper fixing frame and a lower fixing frame, and the inner sides of the upper fixing frame and the lower fixing frame are provided with arc-shaped chamfer transition sections to provide arc surface support when the silicone sheet deforms up and down.

[0007] Furthermore, a sealing ring is provided between the upper fixed frame and the breathable support plate; the breathable support plate is connected to the upper cavity by a silicone sealant.

[0008] Furthermore, the upper cavity is provided with several pneumatic clamping mechanisms to restrict the flexible material gripping mechanism below the upper cavity.

[0009] Furthermore, the lifting device includes a lifting Z-axis disposed below the lower cavity, and an alignment platform is provided between the lifting Z-axis and the lower cavity.

[0010] Furthermore, it also includes a feeding mechanism, which comprises a first feeding station, a wire frame feeding mechanism, a flipping mechanism, and a transfer mechanism; wherein, The first loading station is used to place flexible bonding materials; The flipping mechanism is adapted to carry the flexible material gripping mechanism to above the first feeding station and to attach the flexible bonding material to the flexible material gripping mechanism; the flipping mechanism is provided with a roller mechanism, the roller mechanism including rollers and a linear drive mechanism for driving the rollers, the linear drive mechanism being configured to drive the rollers to roll above the flexible material gripping mechanism so that the flexible bonding material adheres to the flexible material gripping mechanism; The transfer mechanism is equipped with a lateral movement mechanism and a lifting mechanism, and is configured to receive the flexible material gripping mechanism from below the flipping mechanism and transport the flexible material gripping mechanism to the wire frame feeding mechanism. The wire mesh feeding mechanism is adapted to transport the flexible gripping mechanism to the area below the upper bonding mechanism.

[0011] Furthermore, the wire mesh frame feeding mechanism includes an upper feeding mechanism and a lower feeding mechanism. The upper feeding mechanism is used to feed the wire mesh frame from the transfer mechanism to the lower part of the upper cavity; the lower feeding mechanism is adapted to feed the bonded flexible gripping mechanism back from the upper cavity to the transfer mechanism for unloading.

[0012] A surface bonding method, using the aforementioned surface bonding equipment, performs the following actions: S1. The upper cavity and the lower cavity are filled with materials respectively. After filling, the upper cavity and the lower cavity are closed to form a sealed space. S2. Simultaneously evacuate the chambers on the upper and lower sides of the elastic drive member using the first vacuum device and the second vacuum device until a preset vacuum value is reached. S3. Inflate the positive pressure chamber using an inflation device to cause the elastic drive member to deform toward the lower cavity and act on the flexible gripping mechanism to cause the flexible gripping mechanism to deform accordingly. S4. The lifting device drives the curved material to move upward and gradually contact and adhere to the flexible material on the flexible gripping mechanism; continue to control the curved material to rise until the set adhesion pressure is reached.

[0013] Furthermore, during the bonding process in steps S3-S4, the inflation device and the lifting device perform actions synchronously.

[0014] Beneficial effects: This application utilizes a vacuum device to synchronously evacuate air to create a negative pressure space to control the bonding environment, and combines an inflation device to inflate a positive pressure chamber to drive the deformation of flexible materials. With the help of a lifting module, the materials are gradually bonded together, which has the advantages of high bonding uniformity, less air bubble generation, and stable product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a curved surface bonding device according to an embodiment of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the upper bonding mechanism of a curved surface bonding device according to an embodiment of the present invention; Figure 3 This is an exploded structural diagram of the upper bonding mechanism of a curved surface bonding device according to an embodiment of the present invention; Figure 4This is a schematic diagram of the flexible material gripping mechanism of the upper bonding mechanism of a curved surface bonding device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the lower bonding mechanism structure of a curved surface bonding device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the flipping mechanism of a curved surface bonding device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the roller mechanism of the flipping mechanism of a curved surface bonding device according to an embodiment of the present invention; Figure label: Upper bonding mechanism 1, upper cavity 11, flexible material gripping mechanism 12, leather mesh fabric 121, elastic band 122, mesh frame 123, elastic drive component 13, positive pressure chamber 14, breathable support plate 15, upper fixed frame 16, lower fixed frame 17, arc-shaped chamfered transition section 161, sealing ring 18, silicone sealant 19, pneumatic clamping mechanism 110; 2. Lower bonding mechanism, 21. Lower cavity, 22. Mounting fixture, 23. Curved material, 24. Lifting device, 25. Alignment platform; 3. Feeding mechanism, 31. First feeding station, 32. Frame feeding mechanism, 33. Tilting mechanism, 34. Second feeding station, 35. Roller mechanism, 36. CCD imaging mechanism. Detailed Implementation

[0016] Example 1 Combination Figures 1 to 7 As shown, this embodiment proposes a curved surface bonding device, including: an upper bonding mechanism 1 and a lower bonding mechanism 2, wherein the upper bonding mechanism 1 includes an upper cavity 11, and a flexible material gripping mechanism 12 for mounting flexible bonding materials is provided in the upper cavity 11; an elastic driving member 13 is provided between the flexible material gripping mechanism 12 and the upper cavity 11, the elastic driving member 13 is adapted to form a positive pressure chamber 14 between the elastic driving member 13 and the upper cavity 11, and the positive pressure chamber 14 is connected to a first vacuum device and an inflation device; the lower bonding mechanism 2 includes a lower cavity 21 adapted to be coupled to the upper cavity 11 to form a partially enclosed cavity, and a second vacuum device connected to the lower cavity 21; A mounting fixture 22 is provided inside the lower cavity 21 to mount the curved material 23, and a lifting module is provided below the mounting fixture 22 to drive the mounting material to move toward the flexible bonding material during bonding; the first vacuum device and the second vacuum device are configured to simultaneously evacuate the space above and below the flexible gripping mechanism 12 to form a negative pressure space before bonding; the inflation device is configured to inflate the positive pressure chamber 14 to form a positive pressure before bonding to drive the elastic driving member 13 to deform toward the lower cavity, thereby driving the flexible gripping mechanism 12 and the flexible bonding material to gradually bond with the curved material 23 along a path from the center to the periphery.

[0017] In practical applications, the flexible material gripping mechanism 12 can be understood as a structure capable of supporting flexible materials and deforming accordingly with their shape changes. It can be implemented using elastic mesh or film materials, or mesh materials. For example, it can be a woven mesh fabric with a certain degree of flexibility, or a flexible diaphragm made of multi-layer composite materials. Its main function is to provide support for the flexible material and allow it to undergo adaptive deformation under stress. The elastic drive element 13 can be understood as a component capable of deforming under pressure or gas. It can be implemented using an airbag structure or a compressible elastomer. For example, it can be an airbag structure made of rubber, or a mechanical drive unit composed of springs and guide rods. Its main function is to drive the flexible material gripping mechanism 12 to undergo directional deformation when a pressure difference is formed in the positive pressure chamber 14. In another preferred embodiment, the elastic drive element 13 includes a central region and an edge region, with the thickness or hardness of the central region being less than that of the edge region; thus ensuring that the middle deforms and adheres first, and the edge adheres later.

[0018] The positive pressure chamber 14 can be understood as a sealed space, whose pressure can be regulated by gas injection or extraction. Its main function is to provide a controllable pressure environment for the elastic drive component 13. The first vacuum device and the second vacuum device can extract gas from the designated space, which can be achieved through a vacuum pump structure. Before being fitted together, the first vacuum device and the second vacuum device simultaneously evacuate the positive pressure chamber and the lower cavity until the vacuum difference does not exceed a preset threshold, so as to control the silicone sheet to not produce significant deformation during the vacuuming stage. Here, a vacuum / pressure sensor array in the positive pressure chamber and the lower cavity can provide real-time feedback on the pressure difference between the upper and lower cavities. The gas filling device can be understood as a device that can inject gas into a designated space, which can be achieved through an air pump. For example, a miniature diaphragm air pump or a gas supply system composed of a high-pressure gas storage tank and a pressure regulating valve can be used. Its main function is to inject gas into the positive pressure chamber 14 to create a positive pressure environment. The lifting module can be driven by a screw drive, linear motor, or cylinder. Its main function is to drive the curved material 23 upward to achieve contact and bonding with the flexible bonding material. A pressure sensor can be set at the Z-axis position of the lifting module, or a pressure sensor or strain gauge can be loaded on the curved fixture to detect the bonding pressure. This allows the controller to automatically adjust the pumping speed of the two vacuum pumps during the vacuuming stage, so that the vacuum difference is always within the set range. During the bonding stage, the inflation pressure curve and lifting speed are corrected online based on pressure / displacement feedback.

[0019] The innovation of this application lies in achieving precise bonding between flexible bonding material and curved surface material 23 by integrating a vacuum pumping and positive pressure inflation control mechanism, combined with the synergistic effect of the elastic drive component 13 and the lifting module. Specifically, the design of the flexible gripping mechanism 12 allows the flexible bonding material to adaptively deform with the curved surface shape during the bonding process, avoiding the problem of local stress concentration caused by rigid contact and the inability to achieve complete bonding of the curved surface; the cooperation between the elastic drive component 13 and the positive pressure chamber 14 enables the flexible bonding material to gradually bond from the central area to the surrounding areas, solving the problem of difficulty in precisely controlling the bonding force; the synchronous pumping operation of the first and second vacuum devices effectively eliminates residual air between the material interfaces, preventing the formation of air bubbles; the synergistic work of the inflation device and the lifting module further optimizes the bonding quality, ensuring the stability and consistency of the bonding process. Thus, this technical solution effectively addresses the problems of difficult-to-control bonding force, insufficient bonding uniformity, and easy formation of air bubbles during bonding in existing technologies.

[0020] During the bonding process, the positive pressure chamber 14 is filled with gas through the synchronous pumping of the first and second vacuum devices and the inflation control of the inflation device, as well as the smooth drive of the lifting module. This ensures that the bonding process between the flexible bonding material and the curved material 23 is uniformly advanced, guaranteeing a reasonable distribution of bonding force and effectively suppressing the generation of air bubbles. In addition, the bonding Z-axis on the upper bonding mechanism 1 is used to drive the upper cavity 11 to rise and fall, thereby driving the upper bonding mechanism 1 to couple with the lower bonding mechanism 2.

[0021] Combination Figures 2 to 4 As shown, the flexible material gripping mechanism 12 described in this embodiment includes an adhesive leather mesh 121 for adhering flexible bonding materials. The four sides of the leather mesh 121 are connected to the mesh frame 123 by elastic bands 122. The lower surface of the mesh frame 123 is adapted to be sealed to the lower cavity 21 during bonding. The elastic drive member 13 is a deformable silicone sheet disposed on the upper side of the leather mesh 121. The silicone sheet is adapted to divide the upper cavity 11 into a lower cavity and a positive pressure cavity 14. A breathable support plate 15 is disposed in the positive pressure cavity 14 to limit the upper deformation stroke of the silicone sheet. The silicone sheet is adapted to deform in the direction of the leather mesh 121 when positive pressure is formed in the positive pressure cavity 14, and act on the leather mesh 121 to make the flexible bonding material gradually bond with the curved material 23 from the middle area to the four sides.

[0022] The leather mesh 121 refers to a flexible material with an adhesive surface, which can be made of fiber fabric or polymer material coated with an adhesive coating. Its purpose is to provide stable adhesion to fix the flexible bonding material. It is important to note that the adhesive force of the leather mesh 121 to the flexible bonding material is less than the adhesion force between the flexible bonding material and the curved surface material 23, thus allowing the flexible bonding material to separate from the leather mesh 121 after bonding. In a preferred embodiment, the adhesive force between the leather mesh 121 and the flexible bonding material is 3 to 5 times the adhesion force between the flexible bonding material and the curved surface material, ensuring that it does not fall off during transport and is easy to detach after bonding. The elastic band 122 can be a highly elastic rubber band or an elastic strip made of polyurethane material. Its purpose is to allow the leather mesh 121 to elastically expand and contract under force, thereby adapting to the shape changes of the curved surface material 23. The elastic band is evenly distributed along the circumference of the mesh frame, allowing the mesh to undergo elastic deformation matching the curved surface contour and automatically spring back to its original position after bonding. Silicone sheets are elastomeric materials with high flexibility and deformability. Different deformation properties can be achieved by adjusting their thickness and hardness, aiming to respond to pressure changes and transmit uniform pressure. The ventilated support plate 15 refers to a rigid support structure with vents, which can be made of metal mesh or a perforated plastic plate. Its purpose is to limit excessive deformation of the silicone sheet and ensure uniform pressure distribution.

[0023] Specifically, the leather mesh 121, as the component that directly contacts the flexible bonding material, ensures that the material remains in a stable position before bonding through its adhesive surface. An elastic band 122 connects the leather mesh 121 and the frame 123, providing not only elastic support but also allowing the leather mesh 121 to adaptively adjust to the shape of the curved material 23. A silicone sheet, located above the leather mesh 121, divides the upper cavity 11 into two independent chambers. This design optimizes pressure distribution, ensuring that the pressure within the positive pressure chamber 14 is evenly transmitted to the leather mesh 121. The breathable support plate 15 limits the deformation range of the silicone sheet, ensuring that it does not deform upwards during vacuuming, preventing ultimate damage. When the positive pressure chamber 14 is inflated, the silicone sheet deforms downwards, pushing the leather mesh 121 to deform accordingly, thereby causing the flexible bonding material to gradually unfold from the center area to the surrounding area. Specifically, the silicone sheet first contacts the leather mesh in the center area; through the pressure gradient / shape design of the positive pressure chamber, the radius of the contact area expands over time; this gradual unfolding mechanism effectively avoids the generation of air bubbles, while improving the uniformity and quality of bonding.

[0024] Through the above technical solution, the specific structure of the flexible material gripping mechanism 12 is refined, solving the problem of inaccurate material deformation control during the bonding process, ensuring uniform bonding and avoiding air bubbles. The combined design of the leather mesh 121, elastic band 122, silicone sheet, and breathable support plate 15 not only improves the adaptability and stability of bonding, but also significantly improves bonding quality and efficiency.

[0025] In this embodiment, the silicone sheet is fixed to the upper cavity 11 by the upper fixing frame 16 and the lower fixing frame 17. The inner sides of the upper fixing frame 16 and the lower fixing frame 17 are provided with arc-shaped chamfered transition sections 161 to provide arc-shaped support when the silicone sheet deforms vertically. In practical applications, the upper fixing frame 16 and the lower fixing frame 17 refer to structural components used to clamp and fix the silicone sheet. They can be made of metal or high-strength plastic and can be fixed by bolt connections, snap-fit ​​connections, etc. The arc-shaped chamfered transition section 161 can be understood as a smooth transition area formed by special processing on the inner side of the fixing frame. Its purpose is to alleviate the stress concentration phenomenon in the edge area of ​​the silicone sheet during deformation, thereby improving the uniformity of deformation and structural reliability. By optimizing the fixing method and support structure of the silicone sheet, the stress problem during deformation is effectively solved. The design of the arc-shaped chamfered transition section 161 provides smooth arc-shaped support when the silicone sheet deforms vertically, significantly reducing the risk of stress concentration at sharp edges and making the deformation process more uniform and smooth. This design not only improves the durability of the silicone sheet, but also enhances the stability and quality of the application process.

[0026] In this embodiment, a sealing ring 18 is provided between the upper fixed frame 16 and the ventilated support plate 15; the ventilated support plate 15 and the upper cavity 11 are connected by a silicone sealant 19. The above sealing structure, together with the fixing structure of the silicone sheet, improves the sealing performance of the entire system.

[0027] In this embodiment, a plurality of pneumatic clamping mechanisms 110 are provided on the upper cavity 11 to confine the flexible material gripping mechanism 12 below the upper cavity 11. Here, locking points that cooperate with the pneumatic clamping mechanisms 110 can be provided around the perimeter of the mesh frame 123 to facilitate the fixed connection of the mesh frame 123. The pneumatic clamping mechanism 110 refers to a device that uses gas pressure to achieve the clamping function; it can be implemented using a cylinder and gripper clamping mechanism. Its purpose is to ensure the stability of the flexible material gripping mechanism 12 during the bonding process through reliable clamping force, avoiding displacement or detachment caused by vacuum extraction or inflation deformation.

[0028] Combination Figure 5As shown, in this embodiment, the lifting device 24 includes a lifting Z-axis disposed below the lower cavity 21, and an alignment platform 25 is provided between the lifting Z-axis and the lower cavity 21. The lifting Z-axis is a mechanical structure capable of achieving precise vertical movement control, which can be implemented using ball screw transmission, linear motor drive, or hydraulic cylinder drive. In practical applications, the lifting Z-axis provides a smooth and linear motion trajectory, ensuring the stability of the curved material 23 during the bonding process and avoiding deviations caused by uneven movement. Its purpose is to improve the positional accuracy and stability during the bonding process.

[0029] The alignment platform 25 is an auxiliary structure for support and positioning, which can be implemented using a planar platform with precision guide rails, a multi-degree-of-freedom adjustment mechanism, or an elastic support structure. In practical applications, the alignment platform 25 provides additional support and correction functions for the lower cavity 21 during the lifting process, thereby ensuring that the curved material 23 and the flexible bonding material maintain precise alignment during contact. Its purpose is to eliminate the risk of misalignment during bonding and improve the overall bonding quality. The lifting Z-axis, through precise vertical motion control, enables the curved material 23 within the lower cavity 21 to move upward at a stable rate, while the alignment platform 25 plays a crucial supporting and fine-tuning role in this process. The introduction of the alignment platform 25 not only enhances the overall rigidity of the lifting device 24 but also dynamically compensates for potential positional errors during movement, thereby significantly reducing the probability of bonding deviation. Furthermore, the combined use of the lifting Z-axis and the alignment platform 25 makes the entire bonding process more controllable, effectively solving the problem of misalignment or vibration of the curved material 23 during the lifting process.

[0030] In this embodiment, by placing the lifting device 24 on the outside of the lower cavity 21, and using a sealed sliding sealing structure, the lifting drive rod extends into the lower cavity 21 to drive the installation fixture 22 to rise and fall. The external placement of the lifting device 24 effectively reduces the required volume of the lower cavity 21.

[0031] Combination Figures 1 to 7As shown, in one embodiment, it further includes a feeding mechanism 3, which includes a first feeding station 31, a wire mesh feeding mechanism 32, a flipping mechanism 33, and a transfer mechanism. The first feeding station 31 is used to place flexible bonding material; the flipping mechanism 33 is adapted to move the flexible gripping mechanism 12 above the first feeding station 31 and attach the flexible bonding material to the flexible gripping mechanism 12; the flipping mechanism 33 is provided with a roller mechanism 35, which includes rollers and a linear drive mechanism for driving the rollers. The linear drive mechanism is configured to drive the rollers to roll above the flexible gripping mechanism 12 so that the flexible bonding material adheres to the flexible gripping mechanism 12; the transfer mechanism is provided with a lateral movement mechanism and a lifting mechanism, which is configured to receive the flexible gripping mechanism 12 from below the flipping mechanism 33 and transport the flexible gripping mechanism 12 to the wire mesh feeding mechanism 32; the wire mesh feeding mechanism 32 is adapted to transport the flexible gripping mechanism 12 below the upper bonding mechanism 1. It also includes upper and lower CCD camera mechanisms 36 for camera positioning.

[0032] Specifically, the first loading station 31 refers to a platform or area for placing flexible bonding materials, which can be implemented using a tray with positioning pins or a vacuum adsorption platform, aiming to provide a stable material placement position. The flipping mechanism 33 is a device capable of driving the flexible gripping mechanism 12 to change its spatial posture. It can be implemented using a movable gantry support, aiming to precisely position the gripping mechanism above the material and allow the flexible gripping mechanism 12 to adhere to the flexible bonding material, achieving a flipping effect. The roller mechanism 35 is a device that applies uniform pressure through rolling, which can be implemented using silicone rollers or metal rollers in conjunction with elastic elements, aiming to ensure that the flexible bonding material adheres tightly to the leather mesh 121. The transfer mechanism is a device capable of smoothly transferring the flexible gripping mechanism 12, which can be implemented using linear guides in conjunction with lifting cylinders, aiming to improve material transfer efficiency. The wire mesh feeding mechanism 32 is a device capable of precisely transporting the flexible gripping mechanism 12 to a designated position, which can be implemented using synchronous belt drive or ball screw drive, aiming to ensure accurate material positioning. The upper and lower CCD imaging mechanism 36 refers to a visual inspection system capable of acquiring material position information. It can be implemented using a high-resolution industrial camera in conjunction with a light source, with the aim of improving bonding accuracy. A second loading station 34 is also provided for loading curved material 23.

[0033] The first loading station 31 serves as the starting point for material supply, ensuring the flexible bonding material remains flat through its stable support structure. The flipping mechanism 33, with its multi-degree-of-freedom motion capability, precisely controls the spatial position and orientation of the flexible gripping mechanism 12, ensuring its accurate arrival above the first loading station 31. The roller mechanism 35, through precise control of the linear drive mechanism, applies uniform pressure distribution above the flexible gripping mechanism 12, effectively eliminating air bubbles between materials and preventing their formation. The transfer mechanism, through the coordinated operation of the lateral movement mechanism and the lifting mechanism, achieves a smooth transition of the flexible gripping mechanism 12 between different stations, ensuring the stability of the material's position. The wire mesh feeding mechanism 32, through its precise transmission system, accurately transports the flexible gripping mechanism 12 to below the upper bonding mechanism 1, preparing it for subsequent bonding processes. The upper and lower CCD imaging mechanisms 36, through real-time image acquisition and processing, provide precise positional feedback for the entire loading process, ensuring the accuracy of each component's movements. The above solution solves the accuracy and efficiency problems in the loading process of flexible bonding materials by introducing a specially designed feeding mechanism 3, and has a significant effect in avoiding air bubbles and improving bonding quality.

[0034] The wire mesh frame feeding mechanism 32 described herein includes an upper feeding mechanism and a lower feeding mechanism. The upper feeding mechanism is used to deliver the wire mesh frame 123 from the transfer mechanism to the area below the upper cavity 11; the lower feeding mechanism is adapted to deliver the bonded flexible gripping mechanism 12 from the upper cavity 11 back to the transfer mechanism for unloading. In practical applications, the wire mesh frame feeding mechanism 32 refers to a material conveying device with layered functions, which can be implemented using a double-layer track structure or an independently driven conveyor belt. The upper feeding mechanism can be understood as a component specifically responsible for transporting the unbonded flexible gripping mechanism 12 from the intermediate transition area to the bonding station, its purpose being to ensure a smooth and uninterrupted material supply before bonding; the lower feeding mechanism is used to transport the bonded flexible gripping mechanism 12 from the bonding station back to the intermediate transition area so that the flipping mechanism 33 can grip it again, its purpose being to optimize the unloading process and avoid conflict with the upper feeding operation.

[0035] By introducing a layered wire mesh feeding mechanism 32, the problem of low feeding and unloading efficiency is effectively solved. The upper and lower feeding mechanisms are physically independent, allowing them to operate simultaneously. For example, during the bonding process, the upper feeding mechanism can transport the wire mesh 123 with flexible bonding material from the transfer mechanism to below the upper cavity 11, while the lower feeding mechanism can return the bonded wire mesh 123 from the upper cavity 11 to the transfer mechanism. This design not only significantly improves the overall operating efficiency of the equipment but also reduces idle time caused by operational interference. Furthermore, this layered feeding method, together with the flipping mechanism 33, the transfer mechanism, and other modules, forms an efficient material flow system, further enhancing the continuous operation capability of the equipment.

[0036] Example 2 In another embodiment, this application also discloses a curved surface bonding method, which performs the following actions using the aforementioned curved surface bonding device: S1. Material is fed into the upper cavity 11 and the lower cavity 21 respectively. After feeding, the upper cavity 11 and the lower cavity 21 are closed to form a sealed space. S2. The first vacuum device and the second vacuum device are used to simultaneously evacuate the chambers on the upper and lower sides of the elastic drive member 13 until the preset vacuum value is reached. S3. Inflate the positive pressure chamber 14 with an inflation device so that the elastic drive member 13 deforms toward the lower cavity 21 and acts on the flexible gripping mechanism so that the flexible gripping mechanism produces a corresponding deformation. S4. The lifting device 24 drives the curved material 23 to move upward and gradually contact and adhere to the flexible material on the flexible gripping mechanism; continue to control the curved material 23 to rise until the set adhesion pressure is reached.

[0037] The core innovation of this application lies in achieving a uniform bonding process between flexible materials and curved materials 23 by combining vacuum pumping with a positive pressure inflation mechanism and introducing the progressive deformation characteristics of the elastic drive component 13. Specifically, the synchronous vacuuming operation eliminates the pressure difference between the upper and lower chambers, ensuring that the flexible material is uniformly stressed before bonding and avoiding initial wrinkles or air bubbles. The inflation process of the positive pressure chamber 14 is used to allow the flexible bonding material to gradually bond to the curved surface from the center outwards. During the positive pressure inflation process, since the silicone sheet isolates the lower chamber from the positive pressure chamber 14, gas will not enter the bonding chamber. In addition, the precise control of the lifting device 24 further optimizes the distribution of bonding force, ensuring that the bonding process proceeds smoothly from the edge to the center, ultimately solving the problems of difficult-to-control bonding force, inability to guarantee bonding degree, and easy generation of air bubbles during bonding, thus improving the bonding quality and consistency.

[0038] This technical solution integrates vacuum pumping and positive pressure inflation control mechanisms, combined with the synergistic effect of the elastic drive component 13 and the lifting module, to achieve precise bonding between flexible bonding materials and curved surface materials 23. This effectively addresses the problems of difficult-to-control bonding force, insufficient bonding uniformity, and the tendency to generate air bubbles during bonding found in existing technologies. It is important to note that during the vacuuming process, a pressure controller is required to simultaneously maintain a nearly uniform vacuum level between the lower chamber and the positive pressure chamber 14. This prevents significant deformation of the silicone sheet due to differences in vacuum levels on both sides, which could interfere with the leather mesh fabric 121.

[0039] In a preferred embodiment, during the bonding process in steps S3-S4, the inflation device and the lifting device 24 operate synchronously. Synchronous operation means that the actions of the inflation device and the lifting device 24 are consistent in time. This ensures that the deformation of the flexible gripping mechanism and the rising of the curved material 23 are synchronized. During bonding, when the inflation device begins to inflate the positive pressure chamber 14, the lifting device 24 can simultaneously drive the curved material 23 upwards. This synchronous operation causes the elastic drive member 13 to deform under the action of the inflation device, and transmits this deformation to the flexible gripping mechanism, gradually bringing it into contact with and bonding with the curved material 23. Because the actions of the inflation device and the lifting device 24 are synchronized, the deformation of the flexible material and the contact process with the curved material 23 are coordinated, avoiding problems such as air bubbles and insufficient bonding caused by asynchronous actions. Furthermore, through the above synchronous operation, the bonding pressure can be applied gradually and evenly, effectively improving the uniformity and reliability of the bonding.

[0040] The above-mentioned curved surface bonding method significantly improves the bonding effect between flexible materials and curved surface materials 23 by optimizing the execution sequence of the inflation device and the lifting device 24, and solves the technical problems of uneven pressure distribution, air bubble generation and insufficient bonding that may occur during the bonding process.

[0041] In another embodiment, during the bonding process, a first positive pressure can be applied to the positive pressure chamber 14. After the initial bonding is completed, the lifting device 24 is stopped, and a second positive pressure is applied to the positive pressure chamber 14. The second positive pressure is greater than the first positive pressure, so that the flexible bonding material can be firmly bonded to the curved material 23. That is, after the curved material 23 rises to the set position and completes the first stage of bonding, the lifting device 24 is stopped. While maintaining the preset vacuum value, the inflation device continues to control the inflation device to perform a second stage of inflation to the positive pressure chamber 14, so that a second positive pressure greater than the first stage positive pressure is formed in the positive pressure chamber. This drives the elastic drive member to produce a larger bonding deformation, and the interface between the initially bonded flexible bonding material and the curved material is pressed together again, thereby further squeezing out residual gas and improving the final bonding strength and bonding uniformity. The first level of positive pressure is used to drive the flexible bonding material to complete the initial bonding with the curved substrate. After the lifting stops, a second level of higher positive pressure is applied to eliminate residual air bubbles and improve bonding strength. This solves the problems in traditional airbag / silicone film bonding, such as vacuum imbalance or rough pressure loading methods, which lead to premature film deformation, local bulging, and difficulty in completely eliminating air bubbles. This makes the bonding process more controllable, the bonding surface advances evenly from the center outward, and ultimately there are fewer air bubbles and a more uniform stress distribution.

[0042] It should be understood that the above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0043] The accompanying drawings used in the above description of the embodiments only illustrate certain embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

Claims

1. A curved surface bonding device, characterized in that, include: The upper bonding mechanism and the lower bonding mechanism, wherein, The upper bonding mechanism includes an upper cavity, in which a flexible material gripping mechanism for mounting flexible bonding materials is provided; an elastic driving member is provided between the flexible material gripping mechanism and the upper cavity, the elastic driving member being adapted to form a positive pressure chamber with the upper cavity, and the positive pressure chamber is connected to a first vacuum device and an inflation device. The lower bonding mechanism includes a lower cavity adapted to be coupled to the upper cavity to form a partially enclosed cavity, and a second vacuum device connected to the lower cavity; a mounting fixture is provided in the lower cavity to mount curved materials, and a lifting module is provided below the mounting fixture to drive the mounting material to move toward the flexible bonding material during bonding; The first vacuum device and the second vacuum device are configured to simultaneously evacuate the space above and below the flexible material gripping mechanism to form a negative pressure space before bonding; and the first vacuum device and the second vacuum device simultaneously evacuate the positive pressure chamber and the lower chamber to a vacuum difference not exceeding a preset threshold before bonding, so as to control the silicone sheet to not undergo significant deformation during the vacuuming stage. The inflation device is configured to inflate the positive pressure chamber before bonding to create positive pressure, thereby driving the elastic drive member to deform toward the lower chamber, thereby causing the flexible material gripping mechanism and the flexible bonding material to gradually bond with the curved material along a path from the center to the periphery.

2. The curved surface bonding equipment according to claim 1, characterized in that, The flexible material gripping mechanism includes an adhesive leather mesh for adhering flexible bonding materials. The four sides of the leather mesh are connected to a mesh frame via elastic bands. The lower surface of the mesh frame is adapted to be sealed to the lower cavity during bonding. The elastic drive element is a deformable silicone sheet disposed on the upper side of the leather mesh. The silicone sheet is adapted to divide the upper cavity into a lower chamber and a positive pressure chamber. A breathable support plate is disposed in the positive pressure chamber to limit the upper deformation stroke of the silicone sheet. The silicone sheet is adapted to deform in the direction of the leather mesh when positive pressure is formed in the positive pressure chamber, and act on the leather mesh to gradually bond the flexible bonding material to the curved material from the central area to the surrounding areas.

3. The curved surface bonding equipment according to claim 2, characterized in that, The silicone sheet is fixed to the upper cavity by an upper fixing frame and a lower fixing frame. The inner sides of the upper fixing frame and the lower fixing frame are provided with arc-shaped chamfered transition sections to provide arc surface support when the silicone sheet deforms up and down.

4. The curved surface bonding equipment according to claim 3, characterized in that, A sealing ring is provided between the upper fixed frame and the breathable support plate; the breathable support plate is connected to the upper cavity by a silicone sealant.

5. The curved surface bonding equipment according to claim 2, characterized in that, The upper cavity is provided with several pneumatic clamping mechanisms to restrict the flexible material gripping mechanism below the upper cavity.

6. The curved surface bonding equipment according to claim 1, characterized in that, The lifting device includes a lifting Z-axis disposed below the lower cavity, and an alignment platform is provided between the lifting Z-axis and the lower cavity.

7. The curved surface bonding equipment according to claim 1, characterized in that, It also includes a feeding mechanism, which comprises a first feeding station, a wire frame feeding mechanism, a flipping mechanism, and a transfer mechanism; wherein, The first loading station is used to place flexible bonding materials; The flipping mechanism is adapted to carry the flexible material gripping mechanism to above the first feeding station and to attach the flexible bonding material to the flexible material gripping mechanism; the flipping mechanism is provided with a roller mechanism, the roller mechanism including rollers and a linear drive mechanism for driving the rollers, the linear drive mechanism being configured to drive the rollers to roll above the flexible material gripping mechanism so that the flexible bonding material adheres to the flexible material gripping mechanism; The transfer mechanism is equipped with a lateral movement mechanism and a lifting mechanism, and is configured to receive the flexible material gripping mechanism from below the flipping mechanism and transport the flexible material gripping mechanism to the wire frame feeding mechanism. The wire mesh feeding mechanism is adapted to transport the flexible gripping mechanism to the area below the upper bonding mechanism.

8. The curved surface bonding equipment according to claim 7, characterized in that, The wire mesh frame feeding mechanism includes an upper feeding mechanism and a lower feeding mechanism. The upper feeding mechanism is used to feed the wire mesh frame from the transfer mechanism to the lower part of the upper cavity. The lower feeding mechanism is adapted to feed the bonded flexible gripping mechanism back from the upper cavity to the transfer mechanism for unloading.

9. A method for bonding curved surfaces, characterized in that, The curved surface bonding device according to any one of claims 1-8 performs the following actions: S1. The upper cavity and the lower cavity are filled with materials respectively. After filling, the upper cavity and the lower cavity are closed to form a sealed space. S2. Simultaneously evacuate the chambers on the upper and lower sides of the elastic drive member using the first vacuum device and the second vacuum device until a preset vacuum value is reached. S3. Inflate the positive pressure chamber using an inflation device to cause the elastic drive member to deform toward the lower cavity and act on the flexible gripping mechanism to cause the flexible gripping mechanism to deform accordingly. S4. The lifting device drives the curved material to move upward and gradually contact and adhere to the flexible material on the flexible gripping mechanism; continue to control the curved material to rise until the set adhesion pressure is reached.

10. The curved surface bonding method according to claim 9, characterized in that, During the bonding process in steps S3-S4, the inflation device and the lifting device perform actions synchronously.

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