Automatic polarizing sheet attaching machine

Abstract

The utility model discloses an automatic pasting machine of polaroid, relates to the technical field of LCD processing. It includes the casing, and the pasting mechanism and conveying mechanism are distributed in the casing up and down, the conveying mechanism is the conveying belt of horizontal arrangement, the pasting mechanism contains the first hydraulic rod of casing top wall, the U -shaped board of first hydraulic rod telescopic end, the three -level compression roller assembly and drive assembly that rotate in the U -shaped board, three -level compression roller assembly is coaxial integral type structure, and the center compression roller accounts for 60 70% total length and uses 80 90 shore A hardness silica gel, and two end edges compression roller each accounts for 15 20% and uses 55 65 shore A hardness high elasticity silica gel, and the edge compression roller outer periphery opens the spiral flow guide groove, still include the controller, with each electric actuator electric connection. The utility model adapts to the different area pasting demand of polaroid, and the auxiliary exhaust realizes the automation cooperation, and is applicable to the small and medium size LCD panel polaroid pasting.

Description

Technical Field

[0001] This utility model relates to the field of LCD processing technology, and in particular to an automatic polarizer attachment machine. Background Technology

[0002] LCD panel displays rely on the light polarization characteristics of liquid crystal molecules. As a key component, polarizers need to be precisely attached to both sides of the panel. By filtering out unpolarized light, polarized light that can be controlled by liquid crystal molecules is projected normally, ultimately achieving image display. Therefore, polarizer attachment is the core process in LCD panel manufacturing, directly determining the display effect and product qualification.

[0003] In existing polarizer film bonding processes, most equipment uses a single-stage pressure roller structure, with the entire roller made of a material of uniform hardness. If a high-hardness material is chosen to meet the requirement of stable pressure in the central area of ​​the polarizer film, the edge areas will experience concentrated stress due to the excessive rigidity of the pressure roller, which cannot accommodate the slight warping of the polarizer film edges or the chamfering of the panel. This can easily cause cracks and creases at the edges of the polarizer film and may also compress the edge circuitry of the panel. If a low-hardness material is chosen to meet the requirement of flexible edge bonding, the central area will experience excessive deformation of the pressure roller and dispersed pressure, making it impossible to ensure a flat bond and resulting in localized poor bonding. Furthermore, these types of equipment generally lack targeted venting structures, trapping air between the polarizer film and the panel within the contact surface during bonding. This trapped air is difficult to expel, ultimately forming residual air bubbles that severely affect product quality. Utility Model Content

[0004] The purpose of this invention is to provide an automatic polarizer attaching machine to solve the problems of poor compatibility of pressure rollers and poor exhaust effect in existing attaching equipment.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An automatic polarizer attaching machine includes a housing, and an attaching mechanism and a conveying mechanism distributed vertically within the housing.

[0007] The conveying mechanism includes a conveyor belt horizontally arranged within the housing;

[0008] The attachment mechanism includes a first hydraulic rod disposed on the top wall of the housing, a U-shaped plate disposed at the telescopic end of the first hydraulic rod, a three-stage pressure roller assembly rotatably disposed within the U-shaped plate, and a drive assembly for driving the three-stage pressure roller assembly to rotate.

[0009] The three-stage pressure roller assembly is a coaxial integrated rolling structure, including a central pressure roller and edge pressure rollers coaxially disposed at both ends of the central pressure roller; the outer peripheral surfaces of the central pressure roller and the edge pressure rollers are flush and together form the rolling working surface;

[0010] The axial length of the central pressure roller accounts for 60-70% of the total axial length of the three-stage pressure roller assembly, and it is made of silicone material with a hardness of 80-90 Shore A. The axial length of each edge pressure roller accounts for 15-20% of the total axial length of the three-stage pressure roller assembly, and they are all made of high silicone material with a hardness of 55-65 Shore A. The outer circumference of the edge pressure roller section is uniformly provided with spiral guide grooves along the axial direction.

[0011] It also includes a controller, and the electric actuators of the conveying mechanism and the attaching mechanism are electrically connected to the controller via wires.

[0012] Preferably, the drive assembly includes a drive motor fixedly mounted on one side of the U-shaped plate, and the output shaft of the drive motor is connected to the end of the central shaft of the three-stage pressure roller assembly.

[0013] Preferably, a second hydraulic rod is provided on the side wall of the housing and on both sides of the conveyor belt, and a push plate is provided at the telescopic end of the second hydraulic rod.

[0014] Preferably, the push plate has a polytetrafluoroethylene coating on the side near the polarizer. This prevents scratches or wear when the edge of the polarizer comes into contact with the guide plate.

[0015] Preferably, the spiral guide groove has a groove depth of 0.3-0.8 mm and a groove width of 0.8-1.2 mm.

[0016] Preferably, the outer wall of the U-shaped plate is provided with a slider, and the side wall of the housing is provided with a vertical groove that slides in cooperation with the slider.

[0017] Preferably, the slider is provided with a first limiting hole, and the vertical groove has a plurality of second limiting holes that are adapted to the first limiting hole. The first limiting hole and the second limiting holes that are adapted to it are connected by bolts.

[0018] Preferably, the upper surface of the conveyor belt is uniformly provided with a plurality of adsorption holes with a diameter of 1-3 mm, the inside of the conveyor belt is provided with a hollow suction plate, the hollow suction plate is connected to a vacuum generator located at the bottom of the housing through an air pipe, and the vacuum generator is electrically connected to a controller; the top of the hollow suction plate is provided with a plurality of suction holes.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] This invention achieves targeted adhesion to different areas of the polarizer through a segmented design of a three-stage pressure roller assembly: the central pressure roller uses 80-90 Shore A high-hardness silicone, which can apply stable and uniform pressure to 60-70% of the core area of ​​the polarizer, effectively avoiding the problems of poor center adhesion and unevenness caused by pressure dispersion in traditional single-stage pressure rollers; the two end edge pressure rollers use 55-65 Shore A high-elasticity silicone, which can flexibly deform with the slight warping of the polarizer edge or the chamfer of the panel, ensuring tight edge adhesion while avoiding edge cracking and creases caused by rigid extrusion, making the adhesion quality of the entire polarizer area more stable.

[0021] The spiral guide groove on the outer periphery of the edge pressure roller allows air to be discharged axially between the polarizer and the panel during the bonding process, reducing air bubble residue and improving bonding quality.

[0022] By electrically connecting each electric actuator with the controller, the automatic coordination of conveyor belt transmission, pressure roller rotation, and hydraulic rod lifting is realized, eliminating the need for individual manual control and reducing human intervention. Attached Figure Description

[0023] Figure 1 This is a schematic cross-sectional view of Example 1 from the front view.

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the middle three-stage pressure roller assembly from the right view.

[0025] Figure 3 for Figure 2 sectional view of the structure after the first limiting hole is installed;

[0026] In the figure: 1-shell, 2-conveyor belt, 3-first hydraulic rod, 4-U-shaped plate, 5-center pressure roller, 6-edge pressure roller, 7-spiral guide groove, 8-drive motor, 9-second hydraulic rod, 10-push plate, 11-slider, 12-vertical slide, 14-second limiting hole, 15-bolt, 16-hollow suction plate, 17-air pipe. Detailed Implementation

[0027] Example 1

[0028] An automatic polarizer attaching machine, such as Figure 1-2 As shown, it includes a housing 1, and an attachment mechanism and a conveying mechanism distributed vertically within the housing 1;

[0029] like Figure 1-2 As shown, rectangular inlets and outlets are provided at both ends of the housing 1 corresponding to the extension direction of the conveyor belt 2, and rubber dust curtains (not shown in the figure) are fixedly installed on the inner edge of the openings.

[0030] The conveying mechanism includes a conveyor belt 2 horizontally disposed within the housing 1, and a drive unit (existing technology, the principle or structure of which is not described in detail in the application text) that drives the conveyor belt 2 to rotate.

[0031] like Figure 1-2 As shown, the attachment mechanism includes a first hydraulic rod 3 disposed on the top wall of the housing 1, a U-shaped plate 4 disposed at the telescopic end of the first hydraulic rod 3, a three-stage pressure roller assembly rotatably disposed within the U-shaped plate 4, and a drive assembly for driving the three-stage pressure roller assembly to rotate; as shown Figure 2 As shown, the three-stage pressure roller assembly is a coaxial integrated rolling structure, including a central pressure roller 5 and edge pressure rollers 6 coaxially disposed at both ends of the central pressure roller 5; the outer peripheral surfaces of the central pressure roller 5 and the edge pressure rollers 6 are flush, together forming the rolling working surface; the axial length of the central pressure roller 5 accounts for 60-70% of the total axial length of the three-stage pressure roller assembly, and is made of silicone material with a hardness of 80-90 Shore A; the axial length of each edge pressure roller 6 accounts for 15-20% of the total axial length of the three-stage pressure roller assembly, and is made of high silicone material with a hardness of 55-65 Shore A, and the outer peripheral surface of each edge pressure roller 6 segment is uniformly provided with spiral guide grooves 7 along the axial direction; furthermore, the groove depth of the spiral guide groove 7 is 0.3-0.8mm and the groove width is 0.8-1.2mm.

[0032] In addition, the automatic bonding machine also includes a controller (a Siemens S7-200 SMART CPU SR40 can be selected, which is located on the side wall of the housing 1 and is not shown in the figure). The electric actuators of the conveying mechanism and the bonding mechanism are electrically connected to the controller through wires.

[0033] Furthermore, such as Figure 1-2 As shown, the drive assembly includes a drive motor 8 fixedly installed on one side of the U-shaped plate 4, and the output shaft of the drive motor 8 is connected to the end of the central shaft of the three-stage pressure roller assembly.

[0034] Working principle: The operator presets parameters through the controller (including the conveyor belt 2 transmission speed, the lifting stroke of the first hydraulic rod 3, and the drive motor 8 speed). The controller starts the drive unit of the conveyor mechanism to make the conveyor belt 2 run. The width of the polarizer to be attached is matched with the total axial length of the three-stage pressure roller assembly (the width of the polarizer covers the center pressure roller 5 and the edge pressure rollers 6 at both ends, ensuring that the center pressure roller 5 acts on the center area of ​​the polarizer and the edge pressure rollers 6 act on the edge area of ​​the polarizer during attachment). The panel to be attached to the polarizer is put into the conveyor belt 2 through the feed port of the housing 1. The rubber dust curtain prevents external dust from entering. The panel is conveyed by the conveyor belt 2 to the three-stage pressure roller assembly. When the roller assembly is directly below, the controller receives a position detection signal and controls the conveyor mechanism to adjust its speed to match the rolling speed of the pressure roller. At the same time, it controls the first hydraulic rod 3 to extend, driving the U-shaped plate and the three-stage pressure roller assembly to descend until the rolling working surface contacts the upper surface of the polarizer. Then, the controller starts the drive motor 8, which drives the three-stage pressure roller assembly to rotate. The center pressure roller 5 applies pressure to the central area of ​​the polarizer, and the edge pressure roller 6 applies pressure to the edge area of ​​the polarizer. The spiral guide groove 7 discharges the air during the bonding process. After bonding is completed, the controller controls the first hydraulic rod 3 to retract and reset, and the conveyor belt 2 sends the panel out from the discharge port of the housing 1, completing one bonding cycle.

[0035] Example 2

[0036] Based on Example 1, such as Figure 2 As shown, a second hydraulic rod 9 is provided on the side wall of the housing 1 and on both sides of the conveyor belt 2. A push plate 10 is provided at the telescopic end of the second hydraulic rod 9. By controlling the second hydraulic rod 9 to drive the push plate 10 to move towards each other, the panel on the conveyor belt 2 can be centered and positioned before rolling, ensuring that the center of the panel is aligned with the center of the three-stage pressure roller assembly.

[0037] Furthermore, the push plate 10 has a polytetrafluoroethylene (PTFE) coating on the side near the polarizer. This prevents scratches or wear when the edge of the polarizer comes into contact with the guide plate. In actual application, if the push plate 10 directly contacts the edge of the polarizer when positioning the panel, friction can easily cause scratches on the edge of the polarizer. The PTFE coating on the surface of the push plate 10 reduces the coefficient of friction between the push plate 10 and the edge of the polarizer, effectively preventing scratches during contact.

[0038] Furthermore, such as Figure 3 As shown, the outer wall of the U-shaped plate 4 is provided with a slider 11, and the side wall of the housing 1 is provided with a vertical groove 12 that slides in cooperation with the slider 11. Through the sliding cooperation between the slider 11 and the vertical groove 12, the U-shaped plate can be restricted to move only in the vertical direction, ensuring that the rolling working surface of the three-stage pressure roller assembly is always parallel to the conveyor belt 2 during the lifting and lowering process, and ensuring that the polarizer is subjected to uniform force in each area.

[0039] Furthermore, such as Figure 3As shown, the slider 11 is provided with a first limiting hole, and the vertical slide groove 12 has multiple second limiting holes 14 that are adapted to the first limiting hole. The first limiting hole and the corresponding second limiting holes 14 are connected by bolts 15. In this solution, during long-term processing of panels with fixed thickness, the height of the three-stage pressure roller assembly can be fixed at a preset height without frequent adjustment. By using bolts 15 through the first limiting hole and the corresponding second limiting hole 14, the U-shaped plate and the three-stage pressure roller assembly can be fixed at a preset height, preventing the pressure roller assembly from falling or rising due to pressure fluctuations of the first hydraulic rod 3, and ensuring a stable distance between the rolling working surface and the conveyor belt 2.

[0040] Furthermore, such as Figure 1-2 As shown, the upper surface of the conveyor belt 2 is uniformly provided with several adsorption holes with a diameter of 1-3mm (not shown in the figure). A hollow suction plate 16 is provided inside the conveyor belt 2. The hollow suction plate 16 is connected to a vacuum generator located at the bottom of the housing 1 via an air pipe 17, and the vacuum generator is electrically connected to a controller. Multiple suction holes are provided at the top of the hollow suction plate 16. In actual conveying, the panel is positioned solely by the friction of the conveyor belt 2, which is prone to shifting due to vibration or the inertia of the conveyor belt 2's start and stop. By cooperating with the adsorption holes of the conveyor belt 2, the negative pressure generated by the vacuum generator can stably adsorb the panel onto the conveyor belt 2, preventing panel shifting during conveying. Furthermore, the hollow suction plate 16 can evenly transmit negative pressure to the bottom of the panel, ensuring consistent adsorption force in all areas of the panel and avoiding shifting caused by insufficient local adsorption force. This is especially suitable for conveying thin panels with smooth surfaces and light weight.

[0041] It is worth noting that, in addition to following the same standards, the inlet and outlet ends of conveyor belt 2 also... Figure 1 As shown, it is set inside the housing 1, and the two ends can be extended to the outside of the housing 1 by 1-2dm through the inlet and outlet respectively (the size of the two outlets can be expanded to adapt to the outside).

Claims

1. An automatic polarizer attachment machine, characterized in that, It includes a housing (1), and an attachment mechanism and a conveying mechanism distributed vertically within the housing (1); The conveying mechanism includes a conveyor belt (2) horizontally disposed within the housing (1); The attachment mechanism includes a first hydraulic rod (3) disposed on the top wall of the housing (1), a U-shaped plate (4) disposed at the telescopic end of the first hydraulic rod (3), a three-stage pressure roller assembly rotatably disposed in the U-shaped plate (4), and a drive assembly for driving the three-stage pressure roller assembly to rotate. The three-stage pressure roller assembly is a coaxial integrated rolling structure, including a central pressure roller (5) and edge pressure rollers (6) coaxially arranged at both ends of the central pressure roller (5); the outer peripheral surfaces of the central pressure roller (5) and the edge pressure rollers (6) are flush and together form the rolling working surface; The axial length of the central pressure roller (5) accounts for 60-70% of the total axial length of the three-stage pressure roller assembly, and is made of silicone material with a hardness of 80-90 Shore A; the axial length of each edge pressure roller (6) accounts for 15-20% of the total axial length of the three-stage pressure roller assembly, and is made of high silicone material with a hardness of 55-65 Shore A, and the outer circumferential surface of the edge pressure roller (6) is uniformly provided with spiral guide grooves (7) along the axial direction. It also includes a controller, and the electric actuators of the conveying mechanism and the attaching mechanism are electrically connected to the controller via wires.

2. The automatic polarizer attaching machine according to claim 1, characterized in that, The drive assembly includes a drive motor (8) fixedly installed on one side of the U-shaped plate (4), and the output shaft of the drive motor (8) is connected to the end of the central shaft of the three-stage pressure roller assembly.

3. The automatic polarizer attaching machine according to claim 1, characterized in that, The housing (1) has a second hydraulic rod (9) on its side wall and located on both sides of the conveyor belt (2), and the telescopic end of the second hydraulic rod (9) is provided with a push plate (10).

4. The automatic polarizer attaching machine according to claim 3, characterized in that, The push plate (10) has a polytetrafluoroethylene coating on the side near the polarizer.

5. The automatic polarizer attaching machine according to claim 1, characterized in that, The spiral guide groove (7) has a groove depth of 0.3-0.8 mm and a groove width of 0.8-1.2 mm.

6. The automatic polarizer attaching machine according to claim 1, characterized in that, The outer wall of the U-shaped plate (4) is provided with a slider (11), and the side wall of the housing (1) is provided with a vertical groove (12) that slides with the slider (11).

7. The automatic polarizer attaching machine according to claim 6, characterized in that, The slider (11) is provided with a first limiting hole, and the vertical slide groove (12) is provided with a plurality of second limiting holes (14) that are adapted to the first limiting hole. The first limiting hole and the second limiting holes (14) that are adapted to it are connected by bolts (15).

8. The automatic polarizer attaching machine according to claim 1, characterized in that, The upper surface of the conveyor belt (2) is uniformly provided with a number of adsorption holes with a diameter of 1-3 mm. The inside of the conveyor belt (2) is provided with a hollow suction plate (16). The hollow suction plate (16) is connected to a vacuum generator located at the bottom of the housing (1) through an air pipe (17), and the vacuum generator is electrically connected to the controller. The top of the hollow suction plate (16) is provided with a number of suction holes.

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