Vacuum laminating jig for polarizing sheet attachment

Abstract

The utility model relates to polarizing plate laminating technical field especially relates to a vacuum lamination jig for polarizing plate lamination, including lamination frame, the vacuum upper box and vacuum lower box are installed to lamination frame, lamination frame is installed vacuum air extraction device, and vacuum air extraction device includes vacuum joint and installs the first telescopic pipe of vacuum joint, the first telescopic pipe is installed vacuum switch board, and vacuum switch board installs the second telescopic pipe in communication with the first telescopic pipe and the vacuum air extraction hole elastic contact vacuum connecting plate, and the vacuum connecting plate is shaped with the second telescopic pipe and with the coaxial alignment of vacuum air extraction hole switch connection hole, vacuum connecting plate and vacuum air extraction hole realize dynamic sealing through elastic element, and the multistage telescopic design of combination first telescopic pipe and second telescopic pipe, can be adaptive position deviation when vacuum lower box horizontal movement, to improve the stability of polarizing plate vacuum lamination, will not produce bubble, and the lamination quality is higher.

Description

Technical Field

[0001] This utility model relates to the field of polarizer bonding technology, and in particular to a vacuum bonding fixture for polarizer bonding. Background Technology

[0002] A polarizer attaching machine, also known as a polarizer bonding machine, is a machine that attaches polarizers to both sides of a formed liquid crystal glass substrate. It is also suitable for various assembly processes of touch screen components and window protection components.

[0003] Utility model patent CN208888517U discloses a polarizer film application mechanism, including a main body. A worktable is located at the bottom of the main body, and support blocks are located on both sides of the worktable. A slider is located on the side of each support block closest to the worktable. Protective covers are located on the sides of the worktable furthest from the support blocks. Cylinders are installed inside each protective cover, and push rods extending through the outer side of each cylinder are located at their output ends. Fixing blocks are located on the tops of the two sets of support blocks. The mechanism utilizes pressure rollers to roll and squeeze air bubbles between the film and the glass, improving the polarizer film application effect and resulting in a more aesthetically pleasing application. An electric push rod moves the connecting block up and down, allowing for better adjustment of the pressure roller height and enabling the polarizer film application mechanism to apply films to glass of different thicknesses. Furthermore, the cylinders drive the push rods, achieving automatic film application and improving work efficiency.

[0004] In existing technologies, the vacuum chamber and the pumping device are often directly connected by rigid pipes, such as hard plastic or metal pipes fixed by flanges. When the vacuum chamber deviates in position due to lateral movement, the rigid pipe will be subjected to tensile, compressive or bending stress, which will cause the sealing ring at the interface to deform, age faster, or even crack. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum bonding fixture for bonding polarizers, addressing the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A vacuum bonding fixture for polarizer bonding includes a bonding frame, on which an upper vacuum chamber and a lower vacuum chamber are mounted. It also includes a top drive mechanism for lifting the upper vacuum chamber and a bottom drive mechanism for moving the lower vacuum chamber laterally. A vacuum extraction hole is formed on one side wall of the lower vacuum chamber. A vacuum extraction device coaxially aligned with the vacuum extraction hole is mounted on the bonding frame. The vacuum extraction device includes a vacuum connector and a first telescopic tube mounted on the vacuum connector. A vacuum adapter plate is mounted on the first telescopic tube. The vacuum adapter plate has a second telescopic tube communicating with the first telescopic tube and a vacuum connecting plate in elastic contact with the vacuum extraction hole. The vacuum connecting plate has an adapter connecting hole coaxially aligned with the second telescopic tube and the vacuum extraction hole.

[0008] Furthermore, the vacuum pumping device also includes a vacuum pump body mounted on the frame.

[0009] Furthermore: the vacuum adapter plate is formed with multiple guide holes, through which guide rods are movably inserted. The vacuum connecting plate is installed at the outer end of the guide rods, and a compression spring is sleeved on the bottom of the guide rod between the vacuum connecting plate and the vacuum adapter plate.

[0010] Furthermore: a first guide ring groove coaxially aligned with the vacuum extraction hole is formed on one side wall of the vacuum chamber; a second guide ring groove coaxially aligned with the first guide ring groove is formed on the vacuum connecting plate; a caliper contact plate is formed at the outer end of the second telescopic tube; a third guide ring groove coaxially aligned with the second guide ring groove is formed on the caliper contact plate; and sealing rings are respectively installed in the second guide ring groove and the third guide ring groove.

[0011] Furthermore: the top drive mechanism includes a longitudinal frame mounted on the top of the fitting frame, the longitudinal frame is provided with a longitudinally arranged screw drive mechanism and a longitudinal guide rail structure parallel to the screw drive mechanism, the drive end of the screw drive mechanism is equipped with a longitudinal drive plate, the longitudinal drive plate is slidably connected to the longitudinal guide rail structure, and the longitudinal drive plate is connected to the vacuum upper chamber.

[0012] Furthermore: The longitudinal drive plate is equipped with a buffer fixing plate, and the buffer fixing plate is movably mounted with multiple connecting columns. The connecting columns are fitted with buffer compression springs, and the bottom of the connecting columns is connected to the vacuum upper chamber.

[0013] Furthermore: the longitudinal drive plate is equipped with a top cylinder plate located above the buffer fixing plate, the cylinder mounting plate is equipped with a longitudinally arranged lifting cylinder, the vacuum upper box is provided with a bonding adsorption plate, and the drive end of the lifting cylinder passes through the vacuum upper box and connects to the bonding adsorption plate.

[0014] Furthermore: the bottom drive mechanism includes a bottom sliding structure and a bottom sliding plate slidably mounted on the bottom sliding structure. The vacuum chamber is mounted on the bottom sliding plate. The bottom sliding structure has a bottom linear module arranged along its length, and the drive end of the bottom linear module is connected to the bottom sliding plate.

[0015] Furthermore: the bonding frame is equipped with a bottom drive module parallel to the bottom sliding structure, the bottom drive module is slidably mounted with a feeding bracket, the top of the feeding bracket is mounted with a feeding support plate, and the feeding support plate is formed with positioning grooves for placing the film.

[0016] The beneficial effects of this utility model are as follows: the vacuum connecting plate and the vacuum evacuation hole achieve dynamic sealing through elastic elements. Combined with the multi-stage telescopic design of the first and second telescopic tubes, it can adapt to the positional deviation when the chamber moves laterally under vacuum. The adapter connection hole of the vacuum connecting plate is strictly coaxially sealed with the vacuum evacuation hole and the second telescopic tube to form a straight evacuation channel, thereby realizing the vacuuming of the upper and lower vacuum chambers, improving the stability of the vacuum bonding of the polarizer, preventing the generation of air bubbles, and achieving higher bonding quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the vacuum bonding fixture.

[0018] Figure 2 This is a schematic diagram of the bottom drive mechanism.

[0019] Figure 3 This is a schematic diagram of the top drive mechanism.

[0020] Figure 4 This is a schematic diagram of a vacuum pumping device.

[0021] The reference numerals in the figures include:

[0022] 1- Fitting frame,

[0023] 10-Top drive mechanism, 11-Longitudinal frame, 12-Screw drive mechanism, 13-Longitudinal guide rail structure,

[0024] 14-Longitudinal drive plate, 15-Buffer fixing plate, 16-Connecting column, 17-Buffer compression spring,

[0025] 18-Guide sleeve,

[0026] 2-Vacuum upper chamber,

[0027] 21-Top cylinder plate, 22-Lifting cylinder, 23-Adhesive plate, 24-Top through hole

[0028] 25-Vacuum chamber, 26-Fitting support plate,

[0029] 3-Vacuum pumping device,

[0030] 31-Vacuum extraction port, 32-First telescopic tube, 33-Vacuum adapter plate, 34-Second telescopic tube

[0031] 35 - Vacuum connection plate, 36 - Adapter connection hole, 37 - Vacuum connector

[0032] 4-Vacuum pump body,

[0033] 41-Guide hole, 42-Guide rod, 43-Bottom compression spring, 44-First guide ring groove

[0034] 45-Second guide ring groove, 46-French disc contact plate, 47-Third guide ring groove, 48-Sealing ring,

[0035] 5- Bottom drive mechanism

[0036] 51-Bottom sliding structure, 52-Bottom sliding plate, 53-Bottom linear module, 54-Bottom drive module, 55-Feeding bracket, 56-Feeding support plate, 57-Positioning groove. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings.

[0038] like Figure 1-4 As shown, the vacuum bonding fixture for bonding polarizers includes a bonding frame 1, on which a vacuum upper chamber 2 and a vacuum lower chamber 25 are mounted. It also includes a top drive mechanism 10 for lifting the vacuum upper chamber 2 and a bottom drive mechanism 5 for moving the vacuum lower chamber 25 laterally. The bottom drive mechanism 5 can move the vacuum lower chamber 25 laterally to align it coaxially with the vacuum upper chamber 2, while the top drive mechanism 10 moves the vacuum upper chamber 2 longitudinally to seal it in contact with the vacuum lower chamber 25, forming a sealed space.

[0039] A vacuum extraction hole 31 is formed on one side wall of the vacuum chamber 25. A vacuum extraction device 3 coaxially aligned with the vacuum extraction hole 31 is installed on the frame 1. The vacuum extraction device 3 includes a vacuum connector 37 and a first telescopic tube 32 installed on the vacuum connector 37. A vacuum adapter plate 33 is installed on the first telescopic tube 32. A second telescopic tube 34 communicating with the first telescopic tube 32 and a vacuum connecting plate 35 elastically contacting the vacuum extraction hole 31 are installed on the vacuum adapter plate 33. The vacuum connecting plate 35 is formed with an adapter connecting hole 36 coaxially aligned with the second telescopic tube 34 and the vacuum extraction hole 31.

[0040] The vacuum connecting plate 35 and the vacuum extraction hole 31 achieve dynamic sealing through an elastic element. Combined with the multi-stage telescopic design of the first telescopic tube 32 and the second telescopic tube 34, it can adapt to the positional deviation when the vacuum chamber 25 moves laterally. The adapter connection hole 36 of the vacuum connecting plate 35 is strictly coaxially sealed with the vacuum extraction hole 31 and the second telescopic tube 34 to form a straight-line extraction channel, which realizes the vacuum extraction of the upper vacuum chamber 2 and the lower vacuum chamber, thereby improving the stability of the vacuum bonding of the polarizer, preventing the generation of air bubbles, and achieving higher bonding quality.

[0041] Furthermore, the vacuum pumping device 3 also includes a vacuum pump body 4 installed on the bonding frame 1. The vacuum pump body 4 is connected to the vacuum connector 37 through a pipe. After the top drive mechanism 10 drives the upper vacuum chamber 2 to move longitudinally and make sealed contact with the lower vacuum chamber 25 to form a sealed space, the vacuum pump body 4 works to remove the air from the upper vacuum chamber 2 and the lower vacuum chamber 25, thereby improving the bonding quality.

[0042] The vacuum adapter plate 33 has multiple guide holes 41, through which guide rods 42 are movably inserted. The vacuum connecting plate 35 is installed at the outer end of the guide rods 42. A bottom compression spring 43 is sleeved on the guide rods 42 between the vacuum connecting plate 35 and the vacuum adapter plate 33. The elastic deformation of the bottom compression spring 43 ensures that the vacuum connecting plate 35 always maintains coaxial contact with the vacuum extraction port 31. The elastic modulus of the spring can absorb the instantaneous impact force when the upper vacuum chamber 2 is pressed down, avoiding damage to the sealing surface caused by hard collision between the vacuum connecting plate 35 and the extraction port. The elastic deformation of the bottom compression spring 43 can dynamically adjust the contact pressure of the sealing surface. When the vacuum level fluctuates and the sealing surface slightly disengages, the spring force automatically compensates to ensure sealing reliability.

[0043] Furthermore, a first guide ring groove 44, coaxially aligned with the vacuum extraction port 31, is formed on one side wall of the vacuum chamber 25. A second guide ring groove 45, coaxially aligned with the first guide ring groove 44, is formed on the vacuum connecting plate 35. A contact plate 46 is formed at the outer end of the second telescopic tube 34. A third guide ring groove 47, coaxially aligned with the second guide ring groove 45, is formed on the contact plate 46. Sealing rings 48 are installed in the second guide ring groove 45 and the third guide ring groove 47, respectively. Sealing rings 48 are installed in the first guide ring groove 44, the second guide ring groove 45, and the third guide ring groove 47, forming a triple physical sealing barrier. When the vacuum chamber 25 moves laterally, the elastic deformation of the sealing rings 48 and the clearance fit with the guide ring grooves can automatically compensate for positional deviations, preventing the sealing surface from detaching due to rigid connection.

[0044] Preferably, the sealing ring 48 adopts a composite structure of metal skeleton and fluororubber. The metal skeleton provides rigid support, and the fluororubber layer absorbs the instantaneous impact force when the vacuum upper box 2 is pressed down, so that the contact stress of the sealing surface is stabilized at 1.5-2.0MPa.

[0045] Specifically, the top drive mechanism 10 includes a longitudinal frame 11 mounted on the top of the bonding frame 1. The longitudinal frame 11 is equipped with a longitudinally arranged screw drive mechanism 12 and a longitudinal guide rail structure 13 parallel to the screw drive mechanism 12. A longitudinal drive plate 14 is mounted on the drive end of the screw drive mechanism 12, and the longitudinal drive plate 14 is slidably connected to the longitudinal guide rail structure 13. The longitudinal drive plate 14 is connected to the upper vacuum chamber 2. Driven by the screw drive mechanism 12, the longitudinal drive plate 14 can move up and down along the length of the longitudinal guide rail structure 13, moving away from or towards the lower vacuum chamber 25 to ensure the sealing of the connection during bonding.

[0046] Preferably, the longitudinal drive plate 14 is equipped with a buffer fixing plate 15, the buffer fixing plate 15 is equipped with a guide sleeve 18, the sleeve is movably equipped with multiple connecting posts 16, the connecting posts 16 are fitted with buffer compression springs 17, and the bottom of the connecting posts 16 is connected to the upper vacuum chamber 2; when the upper vacuum chamber 2 is pressed down and fits against the lower vacuum chamber 25, the buffer compression springs 17 will provide elastic deformation to dynamically adjust the contact pressure of the sealing surface, reducing the resonance caused by the instantaneous impact.

[0047] Furthermore, a top cylinder plate 21 is mounted on the longitudinal drive plate 14 above the buffer fixing plate 15. A longitudinally arranged lifting cylinder 22 is mounted on the cylinder mounting plate. A bonding adsorption plate 23 is provided inside the upper vacuum chamber 2. A top through hole 24 is formed on the top of the upper vacuum chamber 2. The driving end of the lifting cylinder 22 passes through the top through hole 24 and connects to the bonding adsorption plate 23 of the upper vacuum chamber 2. A bonding support plate 26 is mounted on the lower vacuum chamber 25 and is coaxially aligned with the bonding adsorption plate 23. The upper vacuum chamber 2 and the lower vacuum chamber 25 are sealed together. After vacuuming, the lifting cylinder 22 drives the bonding adsorption plate 23 to press down and bond with the bonding support plate 26 of the lower vacuum chamber 25. The upper film adsorbed by the bonding adsorption plate 23 and the lower film positioned on the bonding support plate 26 achieve vacuum pressing. In a vacuum environment, no bubbles will be generated, which can ensure the quality of bonding.

[0048] Preferably, the bottom drive mechanism 5 includes a bottom sliding structure 51 and a bottom sliding plate 52 slidably mounted on the bottom sliding structure 51. The vacuum lower housing 25 is mounted on the bottom sliding plate 52. The bottom sliding structure 51 has a bottom linear module 53 arranged along its length, and the drive end of the bottom linear module 53 is connected to the bottom sliding plate 52. Driven by the bottom linear module 53, the vacuum lower housing 25 can move laterally. After moving outward, the polarizer film bonded to the vacuum lower housing 25 can be unloaded, and then a new lower film to be bonded can be placed on the top of the bonding support plate 26, realizing rapid loading and unloading.

[0049] Preferably, the bonding frame 1 is provided with a bottom drive module 54 parallel to the bottom sliding structure 51. A feeding bracket 55 is slidably mounted on the bottom drive module 54, and a feeding support plate 56 is mounted on the top of the feeding bracket 55. The feeding support plate 56 is formed with a positioning groove 57 for placing the film. When the upper film needs to be fed, the feeding bracket 55 is driven away from the vacuum upper chamber 2 by the bottom drive module 54; a new upper film to be bonded can be placed into the positioning groove 57 of the feeding support plate 56 to achieve initial positioning; then the feeding bracket 55 is driven closer to the vacuum upper chamber 2 by the bottom drive module 54, so that the feeding bracket 55 is vertically coaxially aligned with the bonding adsorption plate 23; the lifting cylinder 22 can descend to adsorb the upper film of the feeding bracket 55 into the vacuum upper chamber 2 for bonding.

[0050] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A vacuum bonding fixture for bonding polarizers, comprising a bonding frame, wherein an upper vacuum chamber and a lower vacuum chamber are mounted on the bonding frame, and further comprising a top drive mechanism for lifting the upper vacuum chamber and a bottom drive mechanism for moving the lower vacuum chamber laterally, wherein a vacuum extraction hole is formed on one side wall of the lower vacuum chamber, characterized in that: The bonding frame is equipped with a vacuum pumping device that is coaxially aligned with the vacuum pumping port. The vacuum pumping device includes a vacuum connector and a first telescopic tube installed on the vacuum connector. The first telescopic tube is equipped with a vacuum adapter plate. The vacuum adapter plate is equipped with a second telescopic tube that communicates with the first telescopic tube and a vacuum connecting plate that is in elastic contact with the vacuum pumping port. The vacuum connecting plate is formed with an adapter connecting hole that is coaxially aligned with the second telescopic tube and the vacuum pumping port.

2. The vacuum bonding fixture for polarizer bonding according to claim 1, characterized in that: The vacuum pumping device also includes a vacuum pump body installed on the frame.

3. The vacuum bonding fixture for polarizer bonding according to claim 2, characterized in that: The vacuum adapter plate is formed with multiple guide holes, through which guide rods are movably inserted. The vacuum connecting plate is installed at the outer end of the guide rods, and a compression spring is sleeved on the bottom of the guide rods between the vacuum connecting plate and the vacuum adapter plate.

4. The vacuum bonding fixture for polarizer bonding according to claim 3, characterized in that: The vacuum chamber has a first guide ring groove formed on one side wall, which is coaxially aligned with the vacuum extraction hole. The vacuum connecting plate has a second guide ring groove formed with the first guide ring groove. The outer end of the second telescopic tube has a contact plate formed. The contact plate has a third guide ring groove formed with the second guide ring groove. Sealing rings are installed in the second guide ring groove and the third guide ring groove respectively.

5. The vacuum bonding fixture for polarizer bonding according to claim 1, characterized in that: The top drive mechanism includes a longitudinal frame installed on the top of the fitting frame. The longitudinal frame is provided with a longitudinally arranged screw drive mechanism and a longitudinal guide rail structure parallel to the screw drive mechanism. A longitudinal drive plate is installed at the drive end of the screw drive mechanism. The longitudinal drive plate is slidably connected to the longitudinal guide rail structure and is connected to the vacuum upper chamber.

6. The vacuum bonding fixture for polarizer bonding according to claim 5, characterized in that: The longitudinal drive plate is equipped with a buffer fixing plate, and the buffer fixing plate is movably mounted with multiple connecting columns. The connecting columns are fitted with buffer compression springs, and the bottom of the connecting columns is connected to the vacuum upper chamber.

7. The vacuum bonding fixture for polarizer bonding according to claim 6, characterized in that: The longitudinal drive plate is equipped with a top cylinder plate located above the buffer fixing plate. The cylinder mounting plate is equipped with a longitudinally arranged lifting cylinder. The vacuum upper box is equipped with a bonding adsorption plate. The drive end of the lifting cylinder passes through the vacuum upper box and connects to the bonding adsorption plate.

8. The vacuum bonding fixture for polarizer bonding according to claim 7, characterized in that: The bottom drive mechanism includes a bottom sliding structure and a bottom sliding plate slidably mounted on the bottom sliding structure. The vacuum chamber is mounted on the bottom sliding plate. The bottom sliding structure has a bottom linear module arranged along its length, and the drive end of the bottom linear module is connected to the bottom sliding plate.

9. The vacuum bonding fixture for polarizer bonding according to claim 8, characterized in that: The bonding frame is provided with a bottom drive module parallel to the bottom sliding structure. The bottom drive module is slidably mounted with a feeding bracket. A feeding support plate is installed on the top of the feeding bracket. The feeding support plate is formed with positioning grooves for placing the film.

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