Membrane pressing device and automatic pre-pressing membrane stacking equipment

Abstract

The invention discloses a membrane pressing device and automatic pre-pressing membrane stacking equipment, and belongs to the technical field of membrane manufacturing. A water bag of a semi-elliptical capsule structure is designed to serve as a pressing part of a membrane, a two-stage pressing mode is provided, in the first stage, the membrane moves from bottom to top through a jacking mechanism, the membrane makes contact with the tail end point of the water bag firstly, the contact area of the membrane and the water bag is gradually enlarged till the membrane and the water bag are completely attached, and then the membrane is pressed; in the second stage, liquid in the water bag continues to be increased, the water bag and the membranes are completely attached at the moment, the pressure is increased at the moment, all the areas on the surfaces of the membranes are evenly stressed, and the pressure is increased at the moment, so that the pressure of the membranes is increased. And a better pressing effect can be achieved. The whole pressing process is automatically completed, and the technical problems that in a traditional technology, manual operation efficiency is low, and the pressing effect is unstable are solved.

Description

Technical Field

[0001] The invention relates to a diaphragm pressing device and automatic pre-pressing film stacking equipment, belonging to the technical field of diaphragm manufacturing. Background Art

[0002] With the development of industries such as ceramic capacitors, food packaging, medical and pharmaceutical packaging, and flexible electronics, the demand for high-performance composite films has expanded rapidly, while at the same time placing higher requirements on the quality of composite films.

[0003] The production process of traditional composite films includes casting, lamination, and pressing, among which casting produces a film of a certain thickness, and then multiple film sheets are stacked according to demand, and finally pressed to obtain a composite film; in the above processes, since the film produced by casting may have appearance defects such as chipping, cracking, streaks, and uneven film thickness, its appearance and thickness need to be inspected before lamination, and the position of the film sheets also needs to be considered in the lamination process. These will affect the quality of the composite film finally obtained by pressing, so strict control is required.

[0004] In the preparation process of the above-mentioned composite film, the last step of pressing is crucial. The magnitude of the pressing force and the uniformity of the pressing force will directly affect the quality of the composite film. For example, the magnitude of the pressing force directly affects the degree of pressing between the film sheets, and the uniformity of the pressing force directly affects the consistency of the performance of different regions of the composite film. In traditional pressing equipment, the pressing component is mostly a flat pressing iron plate. During the pressing process, the iron plate plane applies a pressure on the entire plane of the film sheet to press the film sheet. Under this pressing method, the two surfaces are in contact as a whole, and the air between the film sheets cannot escape during the rapid pressing process, and eventually bubbles appear on the surface of the film sheet, causing the film sheet to be unqualified; moreover, since the thickness of the film produced by the cast film is difficult to be exactly the same, this will result in the overall film sheet after lamination may be higher in some places and lower in some places. This method of direct pressing of the surface to the surface will result in the low part not being pressed, which will result in inconsistent bonding strength between the film sheets, or affect the optical properties of the composite film, or affect its conductive properties, or affect its strength properties, which will affect the subsequent application of the composite film. Summary of the invention

[0005] In order to solve the existing problems of residual bubbles and incomplete pressing due to uneven thickness caused by traditional flat pressing, the present invention provides a diaphragm pressing device and an automated pre-pressing and laminating equipment. By realizing two-stage pressing, the bubble defect problems and uneven pressing problems caused by poor exhaust in traditional flat pressing are solved, and the process of automated detection, lamination and pressing is realized, thereby improving the efficiency and quality of diaphragm pressing.

[0006] The first object of the present invention is to provide a diaphragm pressing device, which includes a pressing area platform 11 for carrying a diaphragm to be pressed, a hydraulic press 13 is arranged directly above the pressing area platform 11, and the pressing component of the hydraulic press 13 is a water bag 12 with a semi-elliptical capsule structure; a lifting component is arranged at the bottom of the pressing area platform 11, which is used to realize the up and down movement of the pressing area platform 11 to cooperate with the water bag 12 to complete the two-stage pressing of the diaphragm to be pressed.

[0007] Optionally, in the first stage of the pressing process, the water bag 12 contains a predetermined amount of liquid so that a corresponding pressure is applied to the diaphragm in the first stage to discharge the air between the diaphragms; in the second stage of the pressing, the amount of liquid contained in the water bag 12 is greater than that in the first stage.

[0008] Optionally, the diaphragm pressing device also includes a sensor 24, which is arranged at the pressing part of the hydraulic press 13, and is used to detect in real time the height from the lower pressing area carrier 11 to the position of the pressing part to determine the dividing time point between the first stage and the second stage of the pressing process.

[0009] Optionally, the lifting component is a hydraulic lifting component, a pneumatic lifting component or a mechanical lifting component.

[0010] Optionally, the liquid contained in the water bag 12 is silicone oil or water.

[0011] Optionally, the material of the water bag 12 is selected from nitrile rubber, polyurethane, polytetrafluoroethylene, fluororubber or silicone rubber.

[0012] The second object of the present invention is to provide an automated pre-pressing film stacking device, which is provided with a detection area, a lamination area and a pressing area, wherein the pressing area is provided with the above-mentioned film pressing device.

[0013] Optionally, the inspection area is used to complete the appearance and thickness inspection of the diaphragm, including an inspection platform 2 and an industrial camera 1 located thereon, the inspection platform 2 is used to carry the diaphragm to be inspected, and the industrial camera 1 is used to obtain an appearance picture of the diaphragm to be inspected so that the background processor can complete the inspection based on the picture.

[0014] Optionally, the lamination area is provided with a plurality of manipulators and a lamination platform 7; the plurality of manipulators include a first manipulator 21 for grasping the membrane, a second manipulator 8 for grasping the isolation membrane, and a third manipulator 6 for grasping the aluminum plate; after the first manipulator 21 grasps the membrane, it rotates the membrane in a predetermined direction and angle and then places it on the lamination platform 7.

[0015] Optionally, the first manipulator 21, the second manipulator 8 and the third manipulator 6 are all vacuum suction cup manipulators.

[0016] Optionally, the lamination area is also provided with a conveyor belt to realize the conveyance of the membrane and the aluminum plate.

[0017] Optionally, the stacking area is also provided with a slide rail for enabling the robot to move in different areas.

[0018] The third object of the present invention is to provide an automated pre-pressing film lamination method, characterized in that the method realizes two-stage lamination of the film based on the above-mentioned automated pre-pressing film lamination equipment, and the method comprises: Step 1, check whether the appearance and thickness of the diaphragm are qualified; Step 2, rotating the qualified membrane sheets according to a predetermined direction and angle and then stacking them; Step 3, first stage lamination: the stacked multi-layer membrane is placed on the lamination area carrier 11 of the membrane lamination device, and the lifting device is started to move the lamination area carrier 11 from bottom to top until the membrane is completely attached to the upper water bag 12; at this time, a predetermined amount of liquid is pre-loaded in the water bag 12 in the membrane lamination device, so that a corresponding pressure is applied to the membrane at this stage to discharge the air between the membranes; Step 4, second stage pressing: the lifting device stops, and the corresponding liquid continues to be transported into the water bag 12 to increase the pressing force to press the diaphragm.

[0019] Optionally, the method determines the boundary time point between the two stages by using a sensor to detect the real-time height from the lower lamination area carrier 11 to the position of the lamination component.

[0020] Optionally, during the first stage of the pressing process, the water bag 12 is pre-loaded with liquid occupying 2 / 3 of its volume, and during the second stage of the pressing process, the remaining 1 / 3 of the volume of the liquid continues to be injected into the water bag 12 .

[0021] Optionally, the step 2 determines the rotation angle according to the number of diaphragms stacked each time.

[0022] The beneficial effects of the present invention are: (1) Curved surface progressive pressing structure design: The present invention sets the hydraulic press pressing part as a water bag with a semi-elliptical capsule structure, so that during the first stage of pressing, the diaphragm and the water bag are gradually fitted from point to surface, so that the bubbles between the diaphragms escape through the gaps in the unpressed area, solving the problem of bubble defects caused by poor exhaust in traditional flat pressing. In the second stage, pressure is continued to be applied to complete the pressing, ensuring the degree of pressing of the diaphragm.

[0023] (2) Dynamic thickness adaptive lamination mechanism: The flexible surface of the capsule and the fluidity of the internal liquid solve the problem of local lamination failure caused by uneven thickness of the cast film. The thickness change of the film stack can be adaptively adjusted during the lamination process. Through three-dimensional deformation contact, both the thinner and thicker areas can obtain uniform compressive stress distribution, ensuring effective lamination of the entire film layer, overcoming the local lamination blind area caused by rigid contact in traditional plane lamination.

[0024] (3) Two-stage pressing method: The present invention adopts a two-stage pressing method. The main purpose of the first stage is to expel bubbles, and the main purpose of the second stage is to compress the membrane. This gradient pressurization mode allows the membrane to gradually enhance the pressing strength after the initial bonding, thereby avoiding the initial impact from damaging the membrane structure and improving the interface bonding strength and density through the final stable high pressure.

[0025] (4) Visual inspection system: The system uses industrial cameras to collect real-time images of the diaphragm surface and combines them with a preset bad pattern database or image detection algorithm to solve the problems of low efficiency and poor consistency of traditional manual visual inspection.

[0026] (5) Robotic precision lamination system: The present invention solves the problem of difference in lamination wall thickness caused by deviation in the rotation angle of the diaphragm during manual lamination and the problem of error in the number of manually laminated diaphragms through the use of a robot and an automated lamination program. The robot controls the diaphragms to pick up a predetermined number of diaphragms in a preset direction and precisely position and laminate them, so as to even out the thickness deviation of the diaphragms and perform thickness compensation, thus preparing for the subsequent lamination process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a front view of a diaphragm pressing device provided by one embodiment of the present invention; Figure 2 is a rear view of a diaphragm pressing device provided by one embodiment of the present invention; Figure 3 is a top view of an automated pre-pressing film stacking device provided by an embodiment of the present invention; Figure 4 is a side view of an automated pre-pressing film stacking device provided by one embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of an automated pre-pressing film stacking device provided by one embodiment of the present invention; Figure 6 yes Figure 5 A magnified schematic diagram of part A; Figure 7 yes Figure 5 A magnified schematic diagram of part B; Figure 8 yes Figure 5 A magnified schematic diagram of part C; Fig. 9 yes Figure 5 The enlarged schematic diagram of the D part; Fig.10 yes Figure 5 The enlarged schematic diagram of part E in the middle; Among them, there are industrial camera 1, detection platform 2, second conveyor belt 3, first slide rail 4, aluminum plate placement area 5, third manipulator 6, stacking platform 7, second manipulator 8, isolation film placement area 9, second slide rail 10, pressing area platform 11, water bag 12, hydraulic press 13, unloading and ejecting mechanism 14, material storage rack 15, material storage support plate 16, false tooth chain 17, false tooth synchronous belt 18, waste collection port 19, waste collection box 20, first manipulator 21, first conveyor belt 22, diaphragm raw material box 23, sensor 24, and lifting cylinder 25. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Embodiment 1 This embodiment provides a film laminating device for laminating a multi-layer film; Figure 1 and Figure 2 As shown, the diaphragm pressing device is provided with a pressing area carrier 11, and a hydraulic press 13 is arranged directly above the pressing area carrier 11. The pressing component of the hydraulic press 13 is a water bag 12 with a semi-elliptical capsule structure, and a lifting component is arranged at the bottom of the pressing area carrier 11; the pressing area carrier 11 is used to carry the diaphragm to be pressed, and a certain amount of silicone oil or water is pre-filled in the water bag 12 to increase its gravity. During the pressing process, the pressing area carrier 11 moves from bottom to top under the action of the bottom lifting component. As the height increases, the diaphragm on the pressing area carrier 11 first contacts the end point of the water bag 12, and the contact area between the two gradually expands until they are fully fitted. After fully fitting, the hydraulic press 13 continues to transport the corresponding liquid into the water bag 12 to increase the pressing force, so that the diaphragm is fully pressed; after the pressing is completed, the pressing area carrier 11 is lowered to the initial height under the action of the bottom lifting component.

[0031] During the above-mentioned pressing process, on the one hand, since the pressing component is a water bag 12 with a semi-elliptical capsule structure, as the height of the platform 11 in the pressing area increases, the membrane on the platform 11 in the pressing area and the water bag 12 are gradually fitted from point to surface, so that the bubbles between the membranes escape outward through the gaps in the unpressed areas, thereby effectively avoiding the generation of bubbles during the pressing process; in the traditional plane pressing method, since the membrane and the plane pressing component (usually an iron plate) are always in integral contact during the entire pressing process, the air between the membranes has no path to escape, and the air cannot be discharged smoothly and will remain inside the membrane, which is manifested as bubbles on the surface of the membrane, causing the membrane to be unqualified; and the present application cleverly designs a pressing component with a semi-elliptical capsule structure to provide an overflow path for the bubbles during the pressing process, and the pressing process of the present application is actually a two-stage pressing method, the first stage is from the contact between the membrane and the water bag 12 to the complete fitting, and the second stage is from the complete fitting of the two to the completion of the pressing; its The main purpose of the first stage is to expel bubbles, and the main purpose of the second stage is to compress the diaphragm. In the second stage, the liquid in the water bag is increased. Since the water bag and the diaphragm are completely attached at this time, if the pressure is increased at this time, the force on the surface of the diaphragm is uniform, and a better pressing effect can be achieved. In order to determine the boundary time point of the two stages, a sensor 24 can be set at the pressing component. The sensor detects the real-time height from the lower pressing area carrier 11 to the position of the pressing component. A height threshold is determined according to the natural drooping height of the water bag 12 and the height of the diaphragm to be pressed. When it is detected that the real-time height of the lower pressing area carrier 11 from the position of the pressing component during the rising process is equal to the height threshold, the second stage is determined to start. The automatic control program controls the hydraulic press 13 to continue to transport the corresponding liquid into the water bag 12 to increase the pressing force. In this embodiment, the water bag 12 is pre-loaded with liquid occupying 2 / 3 of its volume. At the beginning of the second stage, the remaining 1 / 3 of the volume of liquid is continued to be injected into it.

[0032] On the other hand, the pressing component of the present application is set as a water bag 12 with a semi-elliptical capsule structure, which is also used to solve the problem of uniform pressing at different positions of the diaphragm: in the actual production process of the diaphragm, it is difficult to make the thickness of the cast diaphragm completely exactly the same, which causes the overall diaphragm after lamination to be higher in some positions and lower in some positions. If the surfaces are directly pressed together, the thin parts may not be pressed together, and uneven pressing between the diaphragms will cause problems in subsequent applications of the composite diaphragm obtained by pressing, such as inconsistent bonding strength between the diaphragms, and some areas may have low strength due to insufficient pressing, which is prone to tearing or breaking; uneven pressing may also lead to loose contact between the diaphragms, affecting the transmission and reflection of light, and further affecting the optical performance of the product; for composite diaphragms in the semiconductor field, uneven pressing may lead to loose contact between the conductive layers, thereby affecting the uniformity of conductive properties; the pressing surface of traditional planar pressing components is a horizontal plane, so it cannot adapt to the problem of overall height difference of the diaphragm after lamination, and the semi-elliptical capsule structure water bag 12 designed in the present application can adapt to the overall height difference of the diaphragm after being filled with liquid, and can provide a more uniform pressing force to improve its pressing effect.

[0033] In practical applications, the material of the water bag 12 can be selected to be corrosion-resistant and have a certain elasticity and mechanical strength, such as nitrile rubber, polyurethane, polytetrafluoroethylene, fluororubber, silicone rubber, etc.

[0034] In addition, the lifting component at the bottom of the lamination area carrier 11 can be a hydraulic lifting component, a pneumatic lifting component or a mechanical lifting component. In this embodiment, the lifting component is a pneumatic lifting component. Figure 2 The lifting cylinder 25 in the.

[0035] Embodiment 2 This embodiment provides an automated pre-pressing film stacking device, such as Figure 3 and Figure 4 As shown, the equipment is provided with an inspection area, a lamination area, a pressing area and a product buffer area, wherein the inspection area is used to complete the inspection of the cast film, including the inspection of the appearance and thickness; the lamination area is used to realize the lamination of the film, and during the stacking process, the robot takes the corresponding number of film sheets one by one, rotates the film sheets in a certain direction by a certain angle and stacks them together; the pressing area uses the film pressing device provided in Example 1 to realize two-stage pressing; the product buffer area is used to store the film after pressing.

[0036] like Figure 5 and Figure 6 As shown, in the automatic pre-pressing film stacking device provided by the present invention, the detection area is provided with a detection platform 2, and an industrial camera 1 is provided above the detection platform 2. Figure 5(not shown) the film produced by cast film is placed on the detection carrier 2, the industrial camera 1 takes a picture and transmits the picture to the background processor, which identifies whether there are defects such as missing corners, cracks, stripes, etc. on the appearance of the film through the picture detection algorithm. At the same time, the film thickness can be measured by setting a film thickness measuring instrument (such as AF-3000 series film thickness measuring instrument) or indirectly measuring the height from the top surface of the film to the camera through optical principles to achieve film thickness detection. In this embodiment, a monocular camera with a height measurement function is directly used as an example for explanation, and the appearance detection result and the thickness detection result are directly outputted subsequently.

[0037] The specific image detection algorithm can be implemented by training existing deep learning models, such as CNN models, YOLO models, etc., by collecting diaphragm pictures corresponding to various defect situations and diaphragm pictures with qualified appearance, training the above models, and using the trained models to detect diaphragm appearance defects; diaphragm-related parameter standards can also be statistically analyzed through diaphragm pictures corresponding to various defect situations and diaphragm pictures with qualified appearance. During the detection process, it is determined whether the diaphragm has appearance defects by comparing the parameters in the diaphragm pictures collected in real time with the diaphragm-related parameter standards obtained by statistical analysis; this application does not limit the implementation method of appearance detection.

[0038] Figure 2 The middle film raw material box 23 is used to place the film to be tested. In practical applications, it can also be automatically connected with the aforementioned film production process, namely the casting process, to directly transfer the produced film to the detection area. This application does not limit this part.

[0039] The present invention can achieve 100% coverage detection through the above-mentioned automated detection process, and the full inspection ensures that each product is inspected to avoid batch quality problems. In addition, automated detection has accurate defect recognition and can detect tiny defects that are difficult to detect manually. The automated detection judgment standards are consistent, and the detection standards are unified through the program, and the algorithm parameters are fixed to avoid judgment errors caused by personnel subjectivity, while also eliminating misjudgment caused by fatigue. Most importantly, automated detection has high efficiency and stability, and ultra-high-speed detection: industrial camera + image detection algorithm can detect hundreds of diaphragms per minute, and can run continuously: no rest requirements, and will not interrupt the production rhythm.

[0040] It should be noted that for the membranes that fail the inspection, a robot arm can be directly set to grab them from the inspection area and place them in a designated location, or a robot arm responsible for taking the membranes can grab them and place them in a designated location in the subsequent lamination area (for example, this embodiment provides this method, that is, the unqualified membranes are uniformly grabbed by the first robot arm 21 and placed in the waste collection port 19, and the unqualified membranes enter the waste collection box 20 through the waste collection port 19).

[0041] The qualified membranes in the test area can be placed on the conveyor belt by the robot (such as Figure 5 The first conveyor belt 22 in the embodiment is conveyed to the lamination area, such as Figure 5 As shown, the lamination area is provided with a plurality of manipulators, including a first manipulator 21 for grasping the membrane, a second manipulator 8 for grasping the isolation membrane, and a third manipulator 6 for grasping the aluminum plate; Figure 3 As shown, before stacking the diaphragms each time, the third robot 6 grabs an aluminum plate from the aluminum plate placement area 5 and places it on the stacking carrier 7, and then the second robot 8 grabs an isolation film from the isolation film placement area 9 and places it on the aluminum plate to avoid direct contact between the diaphragm and the aluminum plate and damage to the diaphragm. After placing the isolation film, the first robot 21 grabs a predetermined number of diaphragms from the first conveyor belt 22 one by one and stacks them on the isolation film; considering that the thickness of different areas of the diaphragm may have a small range of thickness deviation, if they are directly stacked during stacking, it is possible that the thicker parts will be thicker when stacked together, and the thinner parts will be thinner when stacked together. The overall structure formed after the final stacking may have a large thickness difference. Therefore, when the first robot 21 stacks, the diaphragm will be rotated by a certain angle in a certain direction each time to even out the thickness deviation of the diaphragm and perform thickness compensation. The specific rotation direction and rotation angle are set in advance according to actual conditions.

[0042] The above-mentioned components of the detection area, as well as the stacking stage 7, the aluminum plate placement area 5, the isolation film placement area 9, etc. are reasonably arranged according to the actual operation area, and the present invention does not limit this; for example, Figure 7 and Figure 8 As shown, the first slide rail 4 can be set to enable the third manipulator 6 to reciprocate between the aluminum plate placement area 5 and the starting end of the second conveyor belt 3, the third manipulator 6 grabs the aluminum plate and places it on the second conveyor belt 3, and the aluminum plate is conveyed to the stacking platform 7 via the second conveyor belt 3; the second slide rail 10 is set to enable the second manipulator 8 to reciprocate between the isolation film placement area 9 and the stacking platform 7.

[0043] In practical applications, a vacuum suction cup manipulator can be used to avoid damage to the diaphragm surface caused by mechanical clamping.

[0044] The present invention avoids the situation of miscounting the number of membrane sheets through the above-mentioned automated film stacking process, and the membrane sheets are strictly rotated by a predetermined angle in a preset direction before stacking, so as to compensate for the thickness to the greatest extent and achieve the purpose of uniform membrane thickness.

[0045] After the film stacking is completed, the stacked film together with the aluminum plate at the bottom are placed on the pressing area carrier 11, and then two-stage pressing is performed. The specific structure of the pressing area and the pressing process are introduced in Example 1 and will not be repeated here.

[0046] After the lamination is completed, the membrane is stored in the product buffer area through the material discharge and ejection mechanism 14. Fig. 9 and Fig.10 As shown, in one implementation, the material discharge and ejection mechanism 14 can be a robot, and the product buffer area is provided with a material storage rack 15, a material storage support plate 16, a false tooth chain 17, and a false tooth timing belt 18. The composite film after lamination is placed on the material storage rack 15 by the robot, and then the storage of the composite film is completed through the cooperation between the various components. The present application does not limit this part of the composition, and only takes the above-mentioned components as an example to illustrate its implementation method.

[0047] Embodiment 3 This embodiment provides an automated pre-pressing film lamination method, which implements two-stage lamination of a film sheet through the automated pre-pressing film lamination device provided in the above-mentioned embodiment 2, including: Step 1, check whether the appearance and thickness of the diaphragm are qualified; Appearance defect detection can be achieved through the industrial camera set in the detection area of ​​the above-mentioned automated pre-pressing and laminating equipment combined with an image detection algorithm. Film thickness detection can be achieved by setting a thin film thickness measuring instrument or indirectly measuring the height from the top surface of the film to the industrial camera through optical principles (in specific implementation, an industrial camera with a distance detection function can be selected to achieve it).

[0048] Step 2, rotating the qualified membrane sheets according to a predetermined direction and angle and then stacking them; The stacking of multiple membranes is completed by using multiple manipulators in the stacking area of ​​the automated pre-pressing lamination equipment. Specifically, the number of membrane stacking is predetermined in the robot automation control program. For example, a batch of products requires three membranes to be stacked together for lamination. Then the third manipulator 6 first grabs an aluminum plate from the aluminum plate placement area 5 and places it on the stacking carrier 7. Then the second manipulator 8 grabs an isolation film from the isolation film placement area 9 and places it on the aluminum plate to prevent the membrane from directly contacting the aluminum plate and damaging the membrane. After placing the isolation film, the first manipulator 21 grabs three membranes one by one and stacks them on the isolation film. In order to To make the thickness deviation of the diaphragm uniform, when the first robot 21 grabs the diaphragms three times for stacking, its program can be set to grab the first diaphragm and place it directly on the isolation film on the aluminum plate, grab the second diaphragm and rotate it 90° and place it on the first diaphragm, grab the third diaphragm and rotate it 90° and place it on the second diaphragm, so that different areas of the diaphragm are overlapped to avoid the phenomenon that thicker parts are stacked together to be thicker, and thinner parts are stacked together to be thinner (mainly considering that in the production process of cast diaphragm, the diaphragms produced in the same time period may uniformly show one side thicker and the other side thinner).

[0049] Step 3, first stage lamination: the stacked multi-layer membrane is placed on the lamination area carrier 11 of the membrane lamination device, and the lifting device is started to move the lamination area carrier 11 from bottom to top until the membrane is completely attached to the water bag 12 above; at this time, the water bag 12 in the membrane lamination device is pre-filled with liquid occupying 2 / 3 of its volume, so that corresponding pressure is applied to the membrane at this stage to discharge the air between the membranes; After starting the lifting device, the height from the lower pressing area platform 11 to the position of the pressing component is detected in real time by the sensor, and a height threshold is determined in advance according to the natural drooping height of the water bag 12 and the height of the membrane to be pressed. When it is detected that the real-time height of the lower pressing area platform 11 from the position of the pressing component during the rising process is equal to the height threshold, it is determined that the first stage of pressing is completed.

[0050] Step 4, second stage pressing: the lifting device stops, and the remaining 1 / 3 volume of liquid continues to be injected into the water bag 12 to increase the pressing force and press the diaphragm tightly.

[0051] When the sensor detects that the real-time height of the pressing component from the pressing stage 11 is equal to the height threshold during the rising process, the first stage of pressing is completed. At this time, the remaining 1 / 3 volume of liquid continues to be injected into the water bag 12 to increase the pressing force and compress the membrane.

[0052] After the two-stage pressing is completed, it is stored in the product buffer area.

[0053] Some steps in the embodiments of the present invention may be implemented using software, and the corresponding software program may be stored in a readable storage medium, such as a CD or a hard disk.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A diaphragm pressing device, characterized in that: The diaphragm pressing device comprises a pressing area platform (11) for carrying the diaphragm to be pressed, a hydraulic press (13) is arranged directly above the pressing area platform (11), and the pressing component of the hydraulic press (13) is a water bag (12) with a semi-elliptical capsule structure; a lifting component is arranged at the bottom of the pressing area platform (11) for realizing the up and down movement of the pressing area platform (11) to cooperate with the water bag (12) to complete the two-stage pressing of the diaphragm to be pressed.

2. The diaphragm pressing device according to claim 1, characterized in that: In the first stage of the pressing process, the water bag (12) contains a predetermined amount of liquid, so that a corresponding pressure is applied to the diaphragms in the first stage to discharge the air between the diaphragms; in the second stage of the pressing, the amount of liquid contained in the water bag (12) is greater than that contained in the first stage.

3. The diaphragm pressing device according to claim 2, characterized in that: The diaphragm pressing device further comprises a sensor (24), wherein the sensor (24) is arranged at the pressing component of the hydraulic press (13) and is used to detect in real time the height from the pressing area carrier (11) below to the position of the pressing component so as to determine the dividing time point between the first stage and the second stage of the pressing process.

4. The diaphragm pressing device according to claim 3, characterized in that: The lifting component is a hydraulic lifting component, a pneumatic lifting component or a mechanical lifting component.

5. The diaphragm pressing device according to claim 4, characterized in that: The liquid contained in the water bag (12) is silicone oil or water.

6. An automated pre-pressing film stacking device, characterized in that: The automated pre-pressing film lamination equipment is provided with a detection area, a lamination area and a pressing area, wherein the pressing area is provided with the film pressing device according to any one of claims 1-5.

7. The automated pre-pressing film stacking equipment according to claim 6, characterized in that: The inspection area is used to complete the inspection of the appearance and thickness of the membrane, and comprises an inspection platform (2) and an industrial camera (1) located thereon, wherein the inspection platform (2) is used to carry the membrane to be inspected, and the industrial camera (1) is used to obtain an appearance image of the membrane to be inspected so that the background processor can complete the inspection based on the image.

8. The automated pre-pressing film stacking equipment according to claim 7, characterized in that: The lamination area is provided with a plurality of manipulators and a lamination platform (7); the plurality of manipulators include a first manipulator (21) for grasping a membrane, a second manipulator (8) for grasping an isolation membrane, and a third manipulator (6) for grasping an aluminum plate; the first manipulator (21) grasps the membrane, rotates the membrane in a predetermined direction and angle, and then places the membrane on the lamination platform (7).

9. The automated pre-pressing film stacking equipment according to claim 8, characterized in that: The first manipulator (21), the second manipulator (8) and the third manipulator (6) are all vacuum suction cup type manipulators.

10. An automated pre-pressing film lamination method, characterized in that: The method is based on the automated pre-pressing film stacking equipment according to any one of claims 6 to 9 to achieve two-stage pressing of the film, and the method comprises: Step 1, check whether the appearance and thickness of the diaphragm are qualified; Step 2, rotating the qualified membrane sheets according to a predetermined direction and angle and then stacking them; Step 3, first stage lamination: placing the stacked multi-layer membrane on the lamination area carrier (11) of the membrane lamination device, starting the lifting device to move the lamination area carrier (11) from bottom to top until the membrane is completely in contact with the upper water bag (12); at this time, the water bag (12) in the membrane lamination device is pre-filled with a predetermined amount of liquid, so that a corresponding pressure is applied to the membrane at this stage to discharge the air between the membranes; Step 4, second stage pressing: the lifting device stops, and the corresponding liquid continues to be transported into the water bag (12) to increase the pressing force and press the diaphragm tightly.

Images