A pressurizing device for press bonding

Abstract

The utility model discloses a kind of pressure-holding devices for pressing, including frame and support plate liftablely arranged on frame, the frame is provided with the multiple guide bushings of rectangular array, the support plate is provided with multiple guide rods respectively matched with guide bushing, the drive mechanism of driving support plate lifting is provided on the frame, the support plate below is sequentially provided with the connecting plate parallel with it, fixed base and pressing plate, the support plate rectangular array has multiple adjusting components with connecting plate connection, which can adjust the corresponding distance between it and connecting plate, the connecting plate is provided with multiple column type pressure sensors and fixed base connection, the pressing plate and fixed base are detachably connected, the pressing plate bottom is provided with elastic pressure-maintaining layer. The utility model whole structure is stable, accurate, with very high perpendicularity and stability, pressure is evenly stepped when pressure-holding operation is carried out, and pressure can be accurately controlled, adjustment is convenient, effectively improve product production quality and processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of screen module processing technology, and in particular to a pressure holding device for pressing. Background Technology

[0002] In consumer electronics, home appliances, and automotive electronics, screen modules, as core display components, directly determine the product's display effect (such as color uniformity and brightness consistency) and long-term reliability (such as impact resistance and sealing) through their bonding quality. The screen module bonding process typically involves bonding OLED or LCD modules to structures such as cover plates and touch layers using optical adhesives (OCA / LOCA). After bonding, a pressure-holding process is necessary to achieve two core objectives: first, to ensure the optical adhesive flows evenly under pressure, eliminating uneven adhesive layer thickness; second, to eliminate micro-air bubbles at the bonding interface, preventing them from obstructing or scattering the display image; and third, to allow the optical adhesive to undergo initial curing, laying the foundation for subsequent curing processes. Therefore, the pressure-holding process is a crucial step in ensuring the high yield of screen module bonding. In existing technologies, screen module pressure-holding equipment generally uses cylinders as a power source. The cylinders drive a pressure head to apply pressure to the bonded screen module to complete the pressure-holding operation. However, practice has shown that this type of cylinder-based pressure-holding equipment has three major technical defects that are difficult to overcome, directly restricting the improvement of product yield: 1. Low pressure control accuracy: The power output of the cylinder depends on the regulation of compressed air pressure. Affected by fluctuations in air source pressure, changes in the friction coefficient of the cylinder inner wall, and the compressibility of gas, the actual output pressure is prone to deviations of more than ±5%, which cannot meet the stringent requirements of high-precision screen modules for pressure holding (usually requiring an accuracy of ±1%). 2. Uneven pressure distribution: The cylinder drive structure is mostly subjected to force at a single point or on one side. When the pressure head contacts the screen module, it is easy to produce "line contact" rather than "surface contact". This results in a local pressure difference of more than 20 kPa on the screen surface. Excessive pressure in the edge area can easily cause microcracks in the glass substrate, while insufficient pressure in the center area will lead to residual bubbles. 3. Lack of adaptive adjustment capability: Due to the rigid connection between the cylinder piston rod and the pressure head, when there is slight warping of the screen module or tooling positioning deviation, the pressure head cannot adaptively adjust its posture, generating a lateral off-center load torque during the pressing process. This torque causes a slight tilt or wobbling of 0.5°-2° when the pressure head contacts the screen, further exacerbating the problem of uneven pressure distribution. This ultimately leads to two typical defects: first, Mura spots caused by excessive local pressure (especially in the polarizer area of ​​the LCD module); and second, a bubble residue rate exceeding 5% in the bonding area. In severe cases, this results in a product yield of less than 80%, failing to meet the requirements of mass production. Therefore, existing cylinder-type pressure holding equipment is no longer suitable for the current production needs of high-precision and high-reliability screen modules. There is an urgent need to develop a pressure holding technology with high-precision pressure control, uniform pressure distribution and adaptive posture adjustment capabilities to solve the above-mentioned technical pain points. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pressure-holding device for pressing.

[0004] To achieve the above objectives, a pressure-holding device for pressing includes a frame and a support plate that can be lifted and lowered on the frame. The frame is provided with a plurality of guide sleeves in a rectangular array. The support plate is provided with a plurality of guide rods that are respectively matched with the guide sleeves. A drive mechanism for driving the support plate to rise and fall is provided on the frame. A connecting plate, a fixed seat, and a pressure plate are arranged in sequence below the support plate and parallel to it. The rectangular array of the support plate has a plurality of adjusting components that can adjust the corresponding distance between itself and the connecting plate and are connected to the connecting plate. The connecting plate is provided with a plurality of column-type pressure sensors and is connected to the fixed seat. The pressure plate is detachably connected to the fixed seat. An elastic pressure-holding layer is provided at the bottom of the pressure plate.

[0005] The support plate is powered by a drive mechanism and guided by guide rods to ensure its horizontality during lifting and lowering. The support plate distributes force evenly to the connecting plate via an adjustment assembly, and the connecting plate distributes force evenly to the fixing seat via column-type pressure sensors. This multi-stage, evenly distributed force ensures that the screen module is smoothly pressed and bonded by the elastic pressure-holding layer. To prevent uneven force distribution on the wall surface, multiple column-type pressure sensors monitor the pressure at various locations in real time. If uneven force distribution occurs, the adjustment assembly can be used to adjust the force at that location to ensure uniform force distribution. The detachable pressure plate allows for replacement to accommodate different screen module specifications or requirements.

[0006] Preferably, the adjusting assembly includes a bolt and a threaded sleeve that fits onto the bolt. The lower end of the threaded sleeve passes through the support plate and abuts against the connecting plate. The lower end of the bolt passes through the support plate and is threadedly connected to the connecting plate. The threaded sleeve is connected to positioning nuts at the upper and lower positions of the support plate, respectively.

[0007] The lower end of the bolt is threaded to the connecting plate. The distance between the support plate and the connecting plate at this position can be adjusted by the bolt to achieve the purpose of horizontal adjustment based on the detection data of the column pressure sensor. The nut is used to adjust the position of the nut on the support plate and the distance between the nut and the connecting plate. Together with the adjustment of the bolt, the distance between the support plate and the connecting plate is fixed.

[0008] Preferably, the fixed seat is provided with a sliding groove, and the pressure plate is provided with a sliding protrusion that matches the sliding groove so that it can slide along the sliding groove in the horizontal plane and detach from the fixed seat.

[0009] The sliding groove and sliding protrusion allow for easy disassembly and assembly between the pressure plate and the fixed base. The elastic pressure-holding layer is fixed to the pressure plate to form the pressure-holding head. If different pressure-holding heads with different parameters are required during use, the pressure-holding head can be replaced by changing the pressure plate, making it highly versatile.

[0010] Preferably, the fixed base is provided with an indexing pin connected to the pressure plate, and the pressure plate is provided with positioning holes corresponding to the indexing pin.

[0011] After the pressure plate and the fixed base are aligned and installed, precise positioning is required. The matching of the indexing pin and the positioning hole is used to position the pressure plate during installation. When disassembling, the indexing pin needs to be removed to disengage it from the positioning hole.

[0012] Preferably, the fixing seat is provided with a plurality of elastic positioning posts, the lower ends of which abut against the pressure plate.

[0013] The function of the elastic positioning column is to press the pressure plate. The pressure plate forms a detachable sliding connection through the sliding protrusion and the sliding groove. The sliding protrusion and the sliding groove are in clearance fit. The function of the elastic positioning column is to fill the gap, so that the sliding protrusion is in close contact with the sliding groove wall of the elastic positioning column to fix the pressure plate.

[0014] Preferably, the column pressure sensors are arranged in a rectangular array and the number corresponds to the adjustment components, with each column pressure sensor arranged in a one-to-one correspondence with the adjustment components.

[0015] The arrangement of the rectangular array of column pressure sensors ensures the uniformity of force applied to the connecting plate and the fixed base, while the correspondence between the column pressure sensors and the adjustment components can better support the force on the connecting plate.

[0016] Preferably, the support plate, connecting plate, fixing seat, and pressure plate are all arranged horizontally.

[0017] Preferably, a stabilizing plate is provided above the frame and is fixedly connected to the upper end of the guide rod.

[0018] A stabilizing plate is installed to connect all the guide rods into a whole. The guide rods are also connected to the support plate in conjunction with the guide sleeve. The overall lifting and lowering can ensure the synchronization of each position, thereby ensuring the uniform distribution of the pressing force.

[0019] Preferably, the driving mechanism is a servo electric cylinder.

[0020] Servo electric cylinders drive the support plate to lift and lower more smoothly and at a faster speed, which is better than direct drive by pneumatic cylinders.

[0021] Preferably, the elastic pressure-retaining layer is silicone, rubber, or sponge.

[0022] Compared with the prior art, the beneficial effects of this utility model are: This utility model's support plate uses a drive mechanism to provide power and a guide rod to ensure its horizontality during lifting and lowering. The support plate, through an adjustment assembly, evenly distributes force to the connecting plate, which in turn evenly distributes force to the fixing seat via column-type pressure sensors. This multi-stage, evenly distributed force ensures that the screen module is smoothly pressed and bonded by the elastic pressure-holding layer. To prevent uneven force distribution on the wall surface, multiple column-type pressure sensors monitor the pressure at various locations in real time. When uneven force is detected, the adjustment assembly can be used to adjust the force at that location, ensuring uniform force distribution across all positions. The detachable design of the pressure plate allows for replacement to accommodate different screen module specifications or requirements.

[0023] This utility model has a stable overall structure, precise guidance, and extremely high verticality and stability. During pressure holding operations, the pressure is evenly distributed in stages, and the pressure can be precisely controlled and easily adjusted, effectively improving product production quality and processing efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the embodiments will be briefly introduced below.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a partial structural schematic diagram of the present invention.

[0027] Figure 3 This is a schematic diagram of the partial explosion structure of this utility model.

[0028] Figure 4 This is an exploded view of the adjustment component of this utility model.

[0029] Figure 5 This is a schematic diagram of the exploded structure of the fixed base of this utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0031] This utility model provides a pressure-holding device for pressing, such as... Figures 1-5As shown, the device includes a frame 1 and a support plate 2 that can be raised and lowered on the frame 1. The frame 1 is provided with a plurality of guide sleeves 11 arranged in a rectangular array. The support plate 2 is provided with a plurality of guide rods 21 that are respectively matched with the guide sleeves 11. The guide rods 21 and the guide sleeves 11 form a smooth guiding effect for the raising and lowering of the support plate 2. The frame 1 is provided with a drive mechanism 3 that drives the support plate 2 to raise and lower. The drive mechanism 3 is a servo electric cylinder. The servo electric cylinder drives the raising and lowering action and speed of the support plate 2 more smoothly, which is better than the direct drive of the cylinder. Below the support plate 2, a connecting plate 4, a fixing seat 5, and a pressure plate 6 are arranged in sequence, parallel to it. The support plate 2 has a rectangular array of multiple adjusting components 7 connected to the connecting plate 4, which can adjust the corresponding distance between the support plate 2 and the connecting plate 4. The connecting plate 4 is provided with multiple column pressure sensors 8 connected to the fixing seat 5. The adjusting components 7 are used for force transmission between the support plate 2 and the connecting plate 4, and the column pressure sensors 8 are used for force transmission between the connecting plate 4 and the fixing seat 5. The column pressure sensors 8 can detect the force at each position in real time, and then make precise adjustments in combination with the adjusting components 7 to ensure uniform force at each position of the fixing seat 5 and ensure the quality of the screen module pressure holding and pressing. Considering the pressure holding requirements of screen modules of different specifications and requirements, the pressure plate 6 and the fixing seat 5 are detachably connected. By replacing the pressure plate 6, the universality problem of applicability to various products can be achieved. The bottom of the pressure plate 6 is provided with an elastic pressure holding layer 9, which is made of silicone, rubber, or sponge.

[0032] The adjusting assembly 7 includes a bolt 71 and a threaded sleeve 72 that is fitted onto the bolt 71. The lower end of the threaded sleeve 72 passes through the support plate 2 and abuts against the connecting plate 4. The lower end of the bolt 71 passes through the support plate 2 and is threadedly connected to the connecting plate 4. The bolt 71 connects the support plate 2 and the connecting plate 4 to form a whole. The threaded sleeve 72 is connected to a positioning nut 73 at the upper and lower positions of the support plate 2, respectively. The positioning nut 73 locks the position of the threaded sleeve 72 on the support plate 2. Similarly, the position of the threaded sleeve 72 on the support plate 2 can be adjusted by the positioning nut 73. Combined with the stabilizing effect of the bolt 71, the distance between the corresponding positions of the support plate 2 and the connecting plate 4 can be adjusted to achieve the purpose of adjusting the force evenly at each position.

[0033] Considering the detachable structure between the pressure plate 6 and the fixed seat 5, the fixed seat 5 is provided with a sliding groove 51, and the pressure plate 6 is provided with a sliding protrusion 61 that matches the sliding groove 51 so that it can slide along the sliding groove 51 in the horizontal plane to detach from the fixed seat 5, thereby realizing the convenient replacement of the pressure plate.

[0034] Since it is a sliding fit, the installation of the pressure plate 6 also requires positioning of the pressure plate 6. Considering the convenience of positioning and disassembly / replacement, the fixed base 5 is provided with an indexing pin 52 connected to the pressure plate 6. The pressure plate 6 is provided with positioning holes 62 that correspond to the indexing pin 52. The purpose of quick replacement is achieved by inserting and pulling the end of the indexing pin 52 into the positioning hole 62.

[0035] Since it is a sliding fit, the sliding protrusion 61 and the slide groove 51 must have a clearance fit. After the pressure plate 6 is positioned by the indexing pin 52, the clearance needs to be filled to ensure a stable connection between it and the fixed seat 5. Therefore, the fixed seat 5 is provided with multiple elastic positioning pins 53. The lower end of the elastic positioning pin 53 abuts against the pressure plate 6, and the pressure plate 6 is pressed by the elastic positioning pin 53, so that the pressure plate 6 is tightly attached to the slide groove 51, thereby solving the problem of gap filling. The elastic positioning pin 53 can be implemented by any existing technology. In one implementation, the main body of the elastic positioning pin 53 is a cylindrical structure with both ends contracting. A spring is installed inside the cylinder. The lower end of the cylinder contracts to wrap around the part of the rotatable ball bearing. The ball bearing is supported by the spring, which facilitates the sliding of the pressure plate and can also play a pressing role by relying on elastic potential energy.

[0036] Considering the issues of force transmission and uniformity, the column pressure sensors 8 are arranged in a rectangular array, and their number corresponds to that of the adjustment components 7. The column pressure sensors 8 are arranged one-to-one with each other close to the adjustment components 7. The rectangular array arrangement of the column pressure sensors 8 ensures the uniformity of force applied by the connecting plate 4 and the fixed base 5, while the correspondence between the column pressure sensors 8 and the adjustment components 7 can better bear the force of the connecting plate 4.

[0037] The support plate 2, connecting plate 4, fixing seat 5, and pressure plate 6 are all arranged horizontally.

[0038] The frame 1 is equipped with stabilizing plates 10 that are fixedly connected to the upper ends of the guide rods 21. The stabilizing plates 10 connect all the guide rods 21 into a whole, and the guide rods 21 are also connected to the support plate 2 in cooperation with the guide sleeves 11. The overall lifting and lowering can ensure the synchronization of each position, thereby ensuring the uniform distribution of the pressing force.

[0039] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A pressure-holding device for pressing, characterized in that, The device includes a frame and a support plate that can be raised and lowered on the frame. The frame is provided with a rectangular array of multiple guide sleeves. The support plate is provided with multiple guide rods that match the guide sleeves. The frame is provided with a drive mechanism that drives the support plate to rise and fall. Below the support plate, a connecting plate, a fixed seat, and a pressure plate are arranged in sequence and parallel to it. The rectangular array of the support plate has multiple adjusting components that can adjust the corresponding distance between itself and the connecting plate and are connected to the connecting plate. The connecting plate is provided with multiple column-type pressure sensors and is connected to the fixed seat. The pressure plate is detachably connected to the fixed seat. An elastic pressure-retaining layer is provided at the bottom of the pressure plate.

2. The pressure-holding device for pressing according to claim 1, characterized in that, The adjusting assembly includes a bolt and a threaded sleeve that fits into the bolt. The lower end of the threaded sleeve passes through the support plate and abuts against the connecting plate. The lower end of the bolt passes through the support plate and is threadedly connected to the connecting plate. The threaded sleeve is connected to a positioning nut at the upper and lower positions of the support plate, respectively.

3. The pressure-holding device for pressing according to claim 1, characterized in that, The fixed seat is provided with a sliding groove, and the pressure plate is provided with a sliding protrusion that matches the sliding groove, so that it can slide along the sliding groove in the horizontal plane and detach from the fixed seat.

4. The pressure-holding device for pressing according to claim 3, characterized in that, The fixed base is provided with an indexing pin connected to the pressure plate, and the pressure plate is provided with positioning holes corresponding to the indexing pin.

5. A pressure-holding device for pressing according to claim 4, characterized in that, The fixed base is provided with multiple elastic positioning posts, and the lower ends of the elastic positioning posts abut against the pressure plate.

6. A pressure-holding device for pressing according to claim 1, characterized in that, The column pressure sensors are arranged in a rectangular array and the number corresponds to the adjustment components. The column pressure sensors are arranged one-to-one with the adjustment components.

7. A pressure-holding device for pressing according to claim 1, characterized in that, The support plate, connecting plate, fixing seat, and pressure plate are all arranged horizontally.

8. A pressure-holding device for pressing according to claim 1, characterized in that, The frame is equipped with stabilizing plates that are fixedly connected to the upper end of the guide rods.

9. A pressure-holding device for pressing according to claim 1, characterized in that, The drive mechanism is a servo electric cylinder.

10. A pressure-holding device for pressing according to claim 1, characterized in that, The elastic pressure-retaining layer is made of silicone, rubber, or sponge.

Images