A defoaming device for OCA optical adhesive

Abstract

The application discloses a bubble removing device for OCA optical glue and belongs to the technical field of optical equipment, which comprises a rack, a rotating disc and a first driving module for driving the rotating disc are rotationally arranged on the rack, a plurality of lower box bodies are arranged on the rotating disc around the rotating axis of the rotating disc, and a tray for placing OCA optical glue to be processed is arranged in the lower box body; a first lifting module and a second lifting module are sequentially arranged on the rack in the rotating direction of the rotating disc, and an upper box body is arranged on the first lifting module; a vacuum module connected with the upper box body is further arranged on the rack, a hot-pressing module for hot-pressing hole-removing operation is arranged in the upper box body; a release film paving module is arranged on the second lifting module; and a controller is further arranged on the rack; and the application can generate a larger pressure difference between the bubble and the external environment, realize natural explosion of the bubble through the pressure difference, and perform secondary hot-pressing shaping on the OCA optical glue in a vacuum environment, so that the bubble removing efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of optical equipment technology, and specifically to a defoaming device for OCA optical adhesive. Background Technology

[0002] OCA optical adhesive is a special adhesive designed specifically for transparent optical components. It employs a substrate-free double-sided tape structure, consisting of optical acrylic adhesive and upper and lower release films. Its core characteristics include high light transmittance (>99%), low haze, high temperature resistance, UV resistance, and excellent adhesion strength. It effectively reduces glare, improves display contrast, and avoids the Newton's rings phenomenon. It is primarily used in touchscreen full lamination processes, connecting the cover glass, touch layer, and display screen. It is also widely used in electronic paper, automotive displays, and aerospace optics.

[0003] In the prior art, due to various factors such as process and production environment, air bubbles often appear inside OCA optical adhesive. These air bubbles will seriously affect the performance of OCA optical adhesive. In the prior art, defoaming is generally done by means of extrusion, but the above methods not only have limited defoaming effect, but also have low defoaming efficiency. Summary of the Invention

[0004] The main objective of this application is to provide a defoaming device for OCA optical adhesive, which aims to solve the problem of low defoaming efficiency in the prior art.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A defoaming device for OCA optical adhesive, comprising a frame;

[0007] A turntable is rotatably mounted on the frame, and a first drive module connected to the turntable is also mounted on the frame. Around the rotation axis of the turntable, a plurality of lower boxes are evenly arranged on the turntable, and a tray for placing the OCA optical adhesive to be processed is provided in the lower box.

[0008] A first lifting module is mounted on the frame, and an upper housing is mounted on the first lifting module and is sealed to the lower housing; a vacuum module connected to the upper housing is also mounted on the frame.

[0009] A hot-pressing module is disposed in the upper housing and is used for hot-pressing the gaps of OCA optical adhesive to eliminate pores.

[0010] The second lifting module is mounted on the frame along the rotation direction of the turntable. The second lifting module is located at the front end of the first lifting module and is equipped with a release film laying module.

[0011] A controller is mounted on the rack.

[0012] Optionally, the first lifting module and the second lifting module have the same structure, both including columns and lifting plates. Each column is mounted on the frame, and each lifting plate is slidably connected to each column via linear motion bearings. Each column is provided with a first electric push rod, and each first electric push rod is connected to each lifting plate.

[0013] Optionally, each of the lower housings is provided with an adjustment baffle, and each of the columns is provided with a slotted photoelectric sensor adapted to the adjustment baffle.

[0014] Optionally, the frame is provided with an annular slide rail, and the annular slide rail is provided with a plurality of sliders respectively connected to the turntable; the first drive module includes a drive motor, the turntable is provided with a drive shaft, and the drive shaft and the drive motor are poweredly connected through a bevel gear.

[0015] Optionally, a plug-in ring is provided on the side of the upper housing that faces the lower housing. The plug-in ring is provided with a plug-in groove that is adapted to the lower housing. A sealing strip with a U-shaped cross-section is provided in the plug-in groove.

[0016] Optionally, the vacuum module includes a vacuum pump and a vacuum tube, the inlet end of which is connected to the upper housing and the outlet end of which is connected to the vacuum pump; the upper housing is also equipped with a vacuum gauge and an electromagnetic venting valve, the vacuum gauge and the electromagnetic venting valve being electrically connected to the controller respectively.

[0017] Optionally, the hot pressing module includes a hot pressing mold and a second electric push rod, the second electric push rod being connected to the hot pressing mold via a pressure sensor; the pressure sensor is electrically connected to the controller.

[0018] Optionally, the hot pressing module further includes a first electric heating plate and a temperature sensor. The hot pressing mold is provided with a heating cavity and a detection hole. The first electric heating plate is disposed in the heating cavity, and the temperature sensor is inserted into the detection hole. The first electric heating plate and the temperature sensor are respectively electrically connected to the controller.

[0019] Optionally, the hot pressing module further includes a second electric heating plate, which is disposed on the side wall of the upper housing and is electrically connected to the controller.

[0020] Optionally, the release film laying module includes a rotating arm, which is rotatably connected to the lifting plate via a rotating shaft. The lifting plate is also equipped with a rotary motor that is powered by the rotating shaft. Suction cups are provided at both ends of the rotating arm along its length.

[0021] Compared with the prior art, this application has the following beneficial effects:

[0022] This application includes a frame on which a turntable is rotatably mounted. A first drive module for driving the turntable is also provided. Around the rotation axis of the turntable, a plurality of lower housings are evenly arranged on the turntable, each containing a tray for holding OCA optical adhesive to be processed. Around the rotation direction of the turntable, a first lifting module and a second lifting module are sequentially arranged on the frame. The first lifting module has an upper housing that is sealed and connected to the lower housings. A vacuum module connected to the upper housing is also provided on the frame, and a hot-pressing module for hot-pressing and hole-removal operations is provided inside the upper housing. A release film laying module is provided on the second lifting module. A controller is also provided on the frame.

[0023] In use, only the bare OCA optical adhesive sheet with the release film attached to the bottom is placed on the tray. Then the turntable rotates to the position of the first lifting module. At the same time, the lower box is located directly below the upper box. Then, under the control of the first lifting module, the upper box moves downward and closes with the lower box to form a closed box. A vacuum environment is formed in the box through the vacuum module. There is a large pressure difference between the vacuum environment and the air bubbles in the OCA optical adhesive. At this time, the air bubbles will burst on their own and expel the air inside.

[0024] Subsequently, the OCA optical adhesive after the bubble bursts is hot-pressed using a hot-pressing module, thereby pressing the semi-molten OCA optical adhesive a second time to eliminate the gaps caused by the bubble bursts; finally, the vacuum level of the chamber is gradually restored, and the surface release film is applied in the next station.

[0025] Compared with the prior art, this application achieves the natural bursting of the bubble by artificially creating a large pressure difference between the bubble and the external environment.

[0026] Meanwhile, in a vacuum environment, there is no more gas inside the bursting bubbles. At this time, hot pressing can not only perform secondary plasticization on the OCA optical adhesive, but also fill the gaps through the reflow of the adhesive, without introducing bubbles again, thus achieving the bubble elimination operation. The two work together to achieve defoaming.

[0027] Compared with traditional extrusion defoaming methods, this application not only does not affect the surface quality of OCA optical adhesive, but also enables secondary plasticization, improving the smoothness of OCA optical adhesive;

[0028] Secondly, under the action of pressure difference, the bubbles will spontaneously break down and disintegrate. Furthermore, by increasing the pressure difference, various tiny bubbles can be further eliminated. Therefore, this application can remove bubbles of various sizes indiscriminately to the greatest extent possible, thereby maximizing the defoaming rate, avoiding bubble residue, and effectively improving the quality of OCA optical adhesive.

[0029] Finally, this application only requires placing the OCA optical adhesive in a vacuum chamber to wait for the bubbles to naturally disintegrate and break down. The waiting time can also be controlled by adjusting the pressure difference, thereby effectively improving the efficiency of the defoaming operation. Furthermore, no additional extrusion equipment is required, simplifying the entire defoaming process. Attached Figure Description

[0030] Figure 1 A schematic diagram of a defoaming device for OCA optical adhesive provided in an embodiment of this application;

[0031] Figure 2 An exploded view of a defoaming device for OCA optical adhesive provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the assembly of the upper and lower housings;

[0033] Figure 4 This is an exploded view of the upper box.

[0034] Figure 5 This is a schematic diagram of the release film laying module.

[0035] Reference numerals: 1-Frame, 2-Turntable, 3-Lower housing, 4-Tray, 5-Upper housing, 6-Controller, 7-Column, 8-Lifting plate, 9-Linear motion bearing, 10-First electric push rod, 11-Adjusting baffle, 12-Slotted photoelectric sensor, 13-Annular slide rail, 14-Slider, 15-Drive motor, 16-Drive shaft, 17-Plug-in ring, 18-Plug-in slot, 19-Sealing strip, 20-Vacuum pump, 21-Vacuum tube, 22-Vacuum gauge, 23-Electromagnetic venting valve, 24-Hot press mold, 25-Second electric push rod, 26-Pressure sensor, 27-First electric heating plate, 28-Temperature sensor, 29-Heating chamber, 30-Detection hole, 31-Second electric heating plate, 32-Rotating arm, 33-Rotating motor, 34-Suction cup.

[0036] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "robot coordinate system and / or m" as an example, it includes the robot coordinate system solution, the m solution, or a solution where both the robot coordinate system and m are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] Implementation Method 1

[0042] Reference Figure 1This embodiment, as an optional embodiment of this application, discloses a defoaming device for OCA optical adhesive, including a frame 1 and a turntable 2. The frame 1 is also provided with a controller 6. A circular slide rail 13 with a circular structure is provided on the frame 1. A plurality of sliders 14 are slidably arranged on the circular slide rail 13. The turntable 2 is a disc. Each slider 14 is connected to the bottom surface of the turntable 2, thereby rotating the frame 1 and the turntable 2.

[0043] A drive shaft 16 is provided on the bottom surface of the turntable 2, and a first drive module is also provided on the frame 1; the first drive module includes a drive motor 15, and the drive shaft 16 is provided on the turntable 2. The drive shaft 16 and the drive motor 15 are connected by bevel gears.

[0044] Preferably, the drive motor 15 is a stepper motor;

[0045] Furthermore, a first lifting module and a second lifting module are also provided on the frame 1, and the first lifting module and the second lifting module are arranged sequentially along the rotation direction of the turntable 2;

[0046] The first lifting module and the second lifting module have the same structure, both including a column 7 and a lifting plate 8. Each column 7 is arranged in an L-shape. The vertical section of the column 7 is connected to the frame 1. Each lifting plate 8 is slidably connected to the vertical section of each column 7 through a linear motion bearing 9. Each column 7 is provided with a first electric push rod 10 on its horizontal section. Each first electric push rod 10 is connected to the top of each lifting plate 8.

[0047] Meanwhile, a distance sensor is also installed on the column 7, with the detection head of the distance sensor facing the lifting plate 8;

[0048] The first electric push rod 10 enables precise control of the position of the lifting plate 8, thereby improving the accuracy of equipment adjustment.

[0049] Furthermore, the top surface of the turntable 2 is provided with a plurality of lower boxes 3, which are arranged in sequence around the rotation axis of the turntable 2. At the same time, each of the lower boxes 3 is provided with a tray 4 for placing the OCA optical adhesive to be processed.

[0050] It should be noted that the number of lower housings 3 can exceed 3, such as 12. The included angle between each lower housing 3 is 30°, and the included angle between the first lifting module and the second lifting module is also 30°, so as to correspond with each lower housing 3 and ensure the accuracy of control.

[0051] Furthermore, in order to improve the control accuracy of the rotation angle, an adjustment baffle 11 is provided on the outer peripheral surface of the lower housing 3 facing the column 7, and a slotted photoelectric sensor 12 is also provided on the column 7.

[0052] In actual operation, when the adjusting baffle 11 is inserted into the slotted photoelectric sensor 12, a corresponding control command can be issued to determine that the rotation is in place, thereby proceeding to the next step of the operation and improving the accuracy of the operation.

[0053] Furthermore, the defoaming device also includes an upper housing 5 and a vacuum module, wherein the top of the upper housing 5 is connected to the lifting plate 8 of the first lifting module, the bottom surface of the upper housing 5 is fully open, the top of the lower housing 3 is fully open, and a plug-in ring 17 is provided on the side of the upper housing 5 and the lower housing 3 facing each other. The plug-in ring 17 is provided with a plug-in groove 18 adapted to the lower housing 3, and a U-shaped sealing strip 19 is provided in the plug-in groove 18.

[0054] When the turntable 2 rotates to the position, the upper box 5 is located directly above the lower box 3. At this time, the first lifting module controls the first upper box 5 to descend, and the sides of the lower box 3 are respectively inserted into the insertion slots 18, while the sealing strip 19 is squeezed, thereby achieving a seal between the upper box 5 and the lower box 3.

[0055] The vacuum module includes a vacuum pump 20 and a vacuum tube 21. The outlet end of the vacuum tube 21 passes through the top of the upper housing 5 and is inserted into the upper housing 5, while its inlet end is connected to the vacuum pump 20. At the same time, a vacuum gauge 22 and an electromagnetic venting valve 23 are also provided on the upper housing 5. The vacuum gauge 22 and the electromagnetic venting valve 23 are electrically connected to the controller 6 respectively.

[0056] After the upper box 5 and the lower box 3 are sealed and fastened together, the air inside the sealed box is extracted by the vacuum pump 20, and the vacuum degree is observed by the vacuum gauge 22 to extract the vacuum according to the relevant parameters set.

[0057] Under vacuum conditions, there is a pressure difference between the inside of the bubble and the environment inside the chamber. Under the action of the pressure difference, the bubble will break down and be destroyed, thereby achieving debubbling.

[0058] Compared with existing technologies, the above defoaming method is not only simple, but also can achieve the indiscriminate removal of all bubbles by controlling the vacuum level, effectively avoiding omissions, improving the success rate of defoaming, and improving product quality.

[0059] Furthermore, the defoaming device also includes a hot pressing module, which includes a hot pressing mold 24 and a second electric push rod 25. The second electric push rod 25 is installed on the top of the upper housing 5, and its extension rod is connected to the hot pressing mold 24 via a pressure sensor 26. The hot pressing mold 24 also has a heating chamber 29 and a detection hole 30. The hot pressing module also includes a first electric heating plate 27 and a temperature sensor 28, which are electrically connected to the controller 6. The hot pressing mold 24 is made of Invar steel.

[0060] After the OCA optical adhesive completes the bubble decomposition, the first electric heating plate 27 is activated to heat the hot pressing mold 24 to reach the set hot pressing temperature. At the same time, the temperature is monitored by the temperature sensor 28. Then, the second electric push rod 25 moves downward and finally fits tightly with the OCA optical adhesive. At this time, the pressure sensor 26 monitors whether the extrusion pressure of the hot pressing mold 24 on the OCA optical adhesive reaches the specified parameters.

[0061] The hot pressing of the hot press mold 24 not only softens the OCA optical adhesive and improves its fluidity, but also the external extrusion pressure can cause the optical adhesive to flow again, thereby filling the voids caused by the bursting of air bubbles. Since the entire hot pressing process is completed in a vacuum environment, air will not be introduced into the OCA optical adhesive again and air bubbles will not form, thus improving the quality of bubble elimination.

[0062] Secondly, this application achieves both bubble bursting and secondary hot pressing in one process, which not only simplifies the operation process but also avoids the transfer of OCA optical adhesive between different processes, thus improving the defoaming efficiency.

[0063] Furthermore, the hot pressing module also includes a second electric heating plate 31, which is disposed on the side wall of the upper housing 5 and is electrically connected to the controller 6;

[0064] While the hot press mold 24 is heated by the first electric heating plate, the internal environment of the box is heated by the second electric heating plate 31, thereby preheating the OCA optical adhesive. This ensures that the OCA optical adhesive has good fluidity when it comes into contact with the hot press mold 24, which is beneficial to improving the efficiency of hot pressing and shaping, and thus improving the defoaming efficiency.

[0065] Furthermore, the defoaming device also includes a release film laying module, which includes a rotating arm 32. A thrust ball bearing is also provided on the lifting plate 8 of the second lifting module. A rotating shaft is provided in the middle of the rotating arm 32. An extrusion plate adapted to the thrust ball bearing is provided on the rotating shaft. The rotating shaft is rotatably connected to the lifting plate 8 through the thrust ball bearing. At the same time, a rotary motor 33 is also provided on the lifting plate 8. The rotary motor 33 is poweredly connected to the rotating shaft through a transmission gear.

[0066] Along the length of the rotating arm 32, suction cups 34 are provided at both ends of the rotating arm 32; at the same time, a temporary storage box for placing release film is also provided on the frame 1.

[0067] When the OCA optical adhesive, after defoaming and hot pressing, enters the area where the second lifting module is located, the position is first determined by the cooperating adjustment baffle 11 and the slotted photoelectric sensor 12. When the determination is qualified, the rotating arm 32 is lowered by the second lifting module. One of the suction cups 34 has a release film adsorbed on it, while the other suction cup 34 is in an empty state. Finally, the release film is applied to the OCA optical adhesive, and at the same time, the empty suction cup 34 adsorbs another release film from the temporary storage box.

[0068] Then the second lifting module rises, and at the same time the suction cup 34, which has placed the release film, releases the release film. During the rising process, the rotating arm 32 is controlled to rotate 180° by the rotary motor 33. By repeating the above operation process, continuous release film covering operation can be achieved.

[0069] Furthermore, a loading robot and a unloading robot are also provided on the frame 1. Around the rotation direction of the turntable 2, the loading robot is located on the rear side of the first lifting module, and the unloading robot is located on the front side of the lifting module. Both the loading robot and the unloading robot are provided with suction cups 34.

[0070] Furthermore, the defoaming device also includes a controller 6, which includes an industrial control computer and a PLC. The industrial control computer and the PLC are connected via a data bus. The PLC is electrically connected to the first electric push rod 10, the second electric push rod 25, the rotary motor 33, the slotted photoelectric sensor 12, the drive motor 15, the first electric heating plate, and other electrical equipment.

[0071] Accordingly, this application also discloses the working process of the defoaming device. For ease of description, the location of the first lifting module is named the defoaming station, the location of the second lifting module is named the film coating station, the loading robot and the unloading robot are located at the loading station and the unloading station, respectively, and storage boxes or conveyor belts are also provided at the loading station and the unloading station.

[0072] When using it, the OCA optical adhesive to be defoamed is first picked up by the loading robot and transferred to the tray. It should be noted that the optical adhesive is an optical adhesive with a bottom release film attached, and its top is exposed.

[0073] The turntable then starts and rotates at a specified angle. When the adjusting baffle enters the slotted photoelectric sensor, it is determined that the rotation is in place. At this time, the lower box enters the defoaming station. The upper box is lowered and sealed to the lower box by the first lifting module.

[0074] The vacuum module is then activated to create a vacuum environment within the sealed chamber. In this vacuum environment, the bubbles burst and expel the gas they contain. It should be noted that, due to factors such as bubble size, internal air pressure, and the thickness of the OCA optical adhesive, the vacuum level and the time required to maintain the vacuum need to be determined based on the actual detection parameters. Controlling the vacuum level ensures that all bubbles burst, while controlling the time allows sufficient time for bubble bursting, thereby improving the debubbling effect.

[0075] It should be noted that multiple different control gradients can be set for vacuum control, with each gradient having a set set time. The advantage of this control method is that it can achieve the gradual and orderly rupture of bubbles while avoiding drastic changes in vacuum.

[0076] After the OCA optical adhesive has been left to stand in a vacuum environment for a specified time, it is radially heated by the first and second electric heating plates. This softens the OCA optical adhesive and heats the hot press mold. Then, the OCA optical adhesive is subjected to secondary hot pressing and shaping through the hot press mold, which also promotes the flow of the OCA optical adhesive to fill the voids caused by the bursting of air bubbles.

[0077] During the hot pressing process, the secondary shaping quality of the OCA optical adhesive is ensured by controlling the pressure, temperature, and hot pressing time. After the hot pressing shaping is completed, the vacuum level is gradually reduced by an electromagnetic vacuum valve to prepare for the separation of the upper and lower boxes.

[0078] Then, the first lifting module is controlled in reverse to separate the upper box and the lower box. At the same time, the OCA optical adhesive that has been defoamed is transferred to the coating station by rotating the turntable. After the coating operation of the butyl release film is completed by the rotating arm, the turntable rotates again to enter the unloading station. The unloading is completed by the unloading robot. After the turntable rotates again, it can re-enter the loading station.

[0079] The rotation of the turntable enables continuous operation, thus achieving defoaming of large batches of OCA adhesive and improving work efficiency.

[0080] Compared with the prior art, this application achieves the natural bursting of the bubble by artificially creating a large pressure difference between the bubble and the external environment.

[0081] Meanwhile, in a vacuum environment, there is no more gas inside the bursting bubbles. At this time, hot pressing can not only perform secondary plasticization on the OCA optical adhesive, but also fill the gaps through the reflow of the adhesive, without introducing bubbles again, thus achieving the bubble elimination operation. The two work together to achieve defoaming.

[0082] Compared with traditional extrusion defoaming methods, this application not only does not affect the surface quality of OCA optical adhesive, but also enables secondary plasticization, improving the smoothness of OCA optical adhesive;

[0083] Secondly, under the action of pressure difference, the bubbles will spontaneously break down and disintegrate. Furthermore, by increasing the pressure difference, various tiny bubbles can be further eliminated. Therefore, this application can remove bubbles of various sizes indiscriminately to the greatest extent possible, thereby maximizing the defoaming rate, avoiding bubble residue, and effectively improving the quality of OCA optical adhesive.

[0084] Finally, this application only requires placing the OCA optical adhesive in a vacuum chamber to wait for the bubbles to naturally disintegrate and break down. The waiting time can also be controlled by adjusting the pressure difference, thereby effectively improving the efficiency of the defoaming operation. Furthermore, no additional extrusion equipment is required, simplifying the entire defoaming process.

[0085] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A defoaming device for OCA optical adhesive, characterized in that, Includes rack (1); A turntable (2) is rotatably mounted on the frame (1). The frame (1) is also provided with a first drive module that is poweredly connected to the turntable (2). Around the rotation axis of the turntable (2), a plurality of lower boxes (3) are evenly arranged on the turntable. The lower boxes (3) are provided with trays (4) for placing the OCA optical adhesive to be processed. The first lifting module is mounted on the frame (1) and is provided with an upper box (5) that is sealed and connected to the lower box (3); the frame (1) is also provided with a vacuum module that is connected to the upper box (5). A hot pressing module is disposed inside the upper housing (5) and is used for hot pressing to eliminate holes in the gaps of OCA optical adhesive. A controller (6) is mounted on the frame (1); The hot pressing module includes a hot pressing mold (24) and a second electric push rod (25). The second electric push rod (25) is connected to the hot pressing mold (24) via a pressure sensor (26). The pressure sensor (26) is electrically connected to the controller (6). The hot pressing module also includes a first electric heating plate (27) and a temperature sensor (28). The hot pressing mold (24) is provided with a heating cavity (29) and a detection hole (30). The first electric heating plate (27) is disposed in the heating cavity (29), and the temperature sensor (28) is inserted into the detection hole (30). The first electric heating plate (27) and the temperature sensor (28) are electrically connected to the controller (6). The second lifting module is disposed on the frame (1) along the rotation direction of the turntable (2). The second lifting module is disposed at the front end of the first lifting module, and a release film laying module is disposed on the second lifting module.

2. The defoaming device for OCA optical adhesive according to claim 1, characterized in that, The first lifting module, the second lifting module and the third lifting module have the same structure. They all include a column (7) and a lifting plate (8). Each column (7) is set on the frame (1). Each lifting plate (8) is slidably connected to each column (7) through a linear motion bearing (9). Each column (7) is provided with a first electric push rod (10). Each first electric push rod (10) is connected to each lifting plate (8).

3. A defoaming device for OCA optical adhesive according to claim 2, characterized in that, Each of the lower housings (3) is provided with an adjustment baffle (11), and each of the columns (7) is provided with a slotted photoelectric sensor (12) adapted to the adjustment baffle (11).

4. The defoaming device for OCA optical adhesive according to claim 1, characterized in that, The frame (1) is provided with an annular slide rail (13), and the annular slide rail (13) is provided with a plurality of sliders (14) respectively connected to the turntable (2); the first drive module includes a drive motor (15), and the turntable (2) is provided with a drive shaft (16), and the drive shaft (16) and the drive motor (15) are connected by bevel gears.

5. A defoaming device for OCA optical adhesive according to claim 1, characterized in that, The upper housing (5) is provided with a plug ring (17) on the side facing the lower housing (3). The plug ring (17) is provided with a plug groove (18) that is adapted to the lower housing (3). A sealing strip (19) with a U-shaped cross-section is provided in the plug groove (18).

6. A defoaming device for OCA optical adhesive according to claim 1, characterized in that, The vacuum module includes a vacuum pump (20) and a vacuum tube (21). The inlet end of the vacuum tube (21) is connected to the upper housing (5), and its outlet end is connected to the vacuum pump (20). The upper housing (5) is also equipped with a vacuum gauge (22) and an electromagnetic venting valve (23). The vacuum gauge (22) and the electromagnetic venting valve (23) are electrically connected to the controller (6).

7. A defoaming device for OCA optical adhesive according to claim 1, characterized in that, The hot pressing module also includes a second electric heating plate (31), which is disposed on the side wall of the upper housing (5) and is electrically connected to the controller (6).

8. A defoaming device for OCA optical adhesive according to claim 2, characterized in that, The release film laying module includes a rotating arm (32), which is rotatably connected to the lifting plate (8) via a rotating shaft. The lifting plate (8) is also equipped with a rotary motor (33) that is powered by the rotating shaft. Along the length of the rotating arm (32), suction cups (34) are provided at both ends of the rotating arm (32).

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