A light guide plate film peeling device

Abstract

This utility model discloses a light guide plate peeling device, relating to the field of liquid crystal display backlight module production technology. The device includes a working platform with a horizontal and a vertical support at its corners. A robotic arm is mounted on the outer side of the working platform, connected to a negative pressure suction cup via a rotating base and a lifting device. The negative pressure suction cup has multiple evenly distributed suction holes, which are hollow and connected to a negative pressure pump. A horizontally sliding partition is also provided inside the suction cup. As the partition moves, the area of ​​negative pressure generated by the suction cup gradually increases, thus achieving the gradual opening and closing of the suction holes. In the initial stage of peeling, only a small area is adsorbed, and the adsorption force is relatively large when the output power of the negative pressure pump remains constant, facilitating effective initiation of the peeling action. As the partition moves, the adsorption area gradually increases, and the adsorption force decreases accordingly, ensuring a smooth peeling process.

Description

Technical Field

[0001] This utility model relates to the technical field of light guide plate production equipment, specifically to a light guide plate film peeling device. Background Technology

[0002] The light guide plate is a core component of the LCD backlight module. Its function is to convert line or point light sources into uniform surface light sources, providing uniform backlight brightness for the display screen. It is usually made of optical-grade materials with high light transmittance, and the surface is formed with micron-level optical structures through laser engraving, etching, or molding processes, guiding the propagation of light through the principles of total internal reflection and refraction.

[0003] During the production and processing of light guide plates, a protective film is often applied to their surface to prevent scratches, contamination, or friction that could damage the microstructure during transportation, storage, or subsequent processing. However, this protective film must be completely removed before assembling into the backlight module; otherwise, residual adhesive residue or debris will significantly reduce the light transmittance of the light guide plate and may even cause glare or hot spots due to uneven surface.

[0004] Currently, mainstream automatic film peeling technologies include mechanical roller peeling, air adsorption peeling, or heat-assisted film removal. Among these, air adsorption peeling suffers from insufficient adsorption force. Although this can be addressed by changing the suction cup power, constantly fluctuating power can easily cause suction cup malfunctions. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a light guide plate film peeling device with stable power.

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

[0007] A light guide plate film peeling device includes a working platform. The corners of the working platform are provided with a horizontal support and a vertical support. A robotic arm is provided on the outside of the working platform. The robotic arm is connected to a negative pressure suction cup via a rotating seat and a lifting device. The negative pressure suction cup has multiple suction holes evenly distributed. The negative pressure suction cup is hollow inside and connected to a negative pressure pump. A partition is horizontally slidably arranged inside the negative pressure suction cup via a moving device. During the movement of the partition, the area of ​​the negative pressure suction cup that generates negative pressure changes from small to large.

[0008] As a preferred technical solution, the working platform and the negative pressure suction cup are arranged in two sets in a centrally symmetrical manner along the vertical axis with the robotic arm as the axis.

[0009] As a preferred technical solution, the rotating base includes a mounting base, and a servo motor is provided on the top surface of the mounting base. The output end of the servo motor causes the robotic arm to rotate in the horizontal direction, and the servo motor is electrically connected to the controller.

[0010] As a preferred technical solution, the lifting device includes a first hydraulic cylinder, which is vertically arranged. The output end of the first hydraulic cylinder causes the negative pressure suction cup to move up and down. The first hydraulic cylinder is electrically connected to the controller.

[0011] As a preferred technical solution, the moving device includes a second hydraulic cylinder, which is fixedly installed on the outside of the vacuum suction cup. The output end of the second hydraulic cylinder is fixedly connected to the partition plate, and the second hydraulic cylinder is electrically connected to the controller, so that the partition plate moves laterally within the negative pressure suction cup, thereby gradually opening and closing multiple suction holes.

[0012] As a preferred technical solution, the working platform is rectangular.

[0013] As a preferred technical solution, the negative pressure suction cup is a hollow cuboid.

[0014] As a preferred technical solution, the partition is slidably connected along the diagonal direction of the contact surface between the cuboid and the work platform.

[0015] As a preferred technical solution, the partition is provided with a through hole, and the negative pressure suction cup is provided with a sliding rod adapted to the through hole.

[0016] The advantages and beneficial effects of this utility model are as follows: The negative pressure suction cup is equipped with a horizontally sliding partition that allows the suction holes to open and close gradually. The negative pressure area gradually increases, avoiding the residue caused by traditional one-time suction. In the initial stage of film removal, only a small area is adsorbed, and the suction force is relatively large when the output power of the negative pressure pump remains constant. As the partition moves, the adsorption area increases, and the adsorption force gradually decreases, adapting to the fact that a larger force is required in the initial stage of film removal, while only a smaller force is needed in the later stage to complete the smooth film removal. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the partition of this utility model;

[0019] Figure label:

[0020] 1-Working platform, 2-Horizontal support frame, 3-Longitudinal support frame, 4-Negative pressure suction cup, 5-Adsorption hole, 6-Baffle, 7-Servo motor, 8-First hydraulic cylinder, 9-Second hydraulic cylinder, 10-Through hole, 11-Slide rod. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0022] Example 1

[0023] like Figures 1 to 2 As shown, a light guide plate film-removing device includes a rectangular working platform 1. The four corners of the working platform 1 are equipped with transverse supports 2 and longitudinal supports 3 for positioning and fixing the light guide plate to be peeled. A robotic arm is located on the outside of the working platform 1. This robotic arm is connected to a hollow cuboid-shaped negative pressure suction cup 4 via a rotating base and a lifting device. The surface of the negative pressure suction cup 4 is evenly distributed with multiple suction holes 5, which are hollow inside and connected to an external negative pressure pump to provide stable suction force.

[0024] A partition 6 is laterally slidable inside the negative pressure suction cup 4. This partition is driven by a second hydraulic cylinder 9 and slides diagonally within the negative pressure suction cup. As the partition 6 moves, it gradually opens the suction holes 5, causing the effective suction area of ​​the negative pressure suction cup to increase. In the initial stage of film removal, only some of the suction holes participate in suction, resulting in a larger suction force per unit area, which is beneficial for tearing the protective film on the light guide plate. As the partition continues to move, the suction area gradually expands, and the suction force decreases accordingly, thus achieving a smooth and continuous film removal action.

[0025] Example 2

[0026] Based on Embodiment 1, this embodiment provides a dual-station light guide plate film peeling device, such as... Figure 2 As shown. The working platform 1 and the negative pressure suction cup 4 are arranged in two sets symmetrically about the axis of the robotic arm in the vertical direction. That is, two symmetrically arranged negative pressure suction cup assemblies are set on the same robotic arm, respectively located on both sides of the working platform.

[0027] Each set of negative pressure suction cups 4 is driven to rotate by an independent servo motor 7 and its up-and-down movement is controlled by the first hydraulic cylinder 8. The second hydraulic cylinder 9 also independently controls the sliding of the partition 6 inside each suction cup, ensuring that the two workstations can perform the film-tearing action synchronously, or they can be controlled separately as needed.

[0028] This structure significantly improves equipment utilization and production efficiency, making it particularly suitable for the continuous production needs of large-volume light guide plates. Furthermore, due to its centrally symmetrical design, the equipment operates more stably, and mechanical vibration and off-center loading are significantly reduced.

[0029] Furthermore, the control system can centrally control the servo motor 7, the first hydraulic cylinder 8, and the second hydraulic cylinder 9 to achieve automated operation. For example, under the controller settings, while one suction cup performs the film-tearing action, another suction cup simultaneously completes the same action, forming a production line-style operation process.

[0030] Example 3

[0031] like Figure 2As shown, based on the aforementioned embodiments, this embodiment further optimizes the sliding mechanism of the partition 6 inside the negative pressure suction cup 4. Specifically, the partition 6 has at least one through hole 10, and a sliding rod 11 is fixedly provided at a corresponding position inside the negative pressure suction cup 4, with one end embedded in the through hole 10 and slidingly engaged therewith. The sliding rod 11 not only provides a stable guiding function for the partition 6, but also enhances its anti-displacement ability during movement.

[0032] The slide bar 11 is made of stainless steel or high-rigidity plastic, and its surface is polished to reduce frictional resistance, ensuring that the partition 6 can move smoothly in the set direction under the drive of the second hydraulic cylinder 9. At the same time, both ends of the slide bar 11 are connected to the inner wall of the negative pressure suction cup 4 through fixed seats to form a stable support structure, preventing the partition from jamming or tilting due to mechanical vibration or uneven load.

[0033] The working principle of this utility model is as follows: During operation, the light guide plate to be peeled is first placed on the work platform 1 and positioned and fixed by the horizontal support 2 and the vertical support 3; then, the robotic arm adjusts the angle under the drive of the servo motor 7, and the first hydraulic cylinder 8 drives the negative pressure suction cup 4 to descend to near the surface of the light guide plate, and the negative pressure pump is started to generate suction force in the suction hole 5; at the same time, the second hydraulic cylinder 9 pushes the partition 6 to slide diagonally inside the negative pressure suction cup, so that the suction hole gradually opens and the suction area increases from small to large, thereby achieving the effect of greater suction force in the early stage of peeling and smooth transition in the later stage; as the partition moves to complete, the protective film is peeled off evenly, the negative pressure is closed after the peeling action is completed, all components are reset, and one work cycle is completed.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A light guide plate film peeling device, characterized in that, The system includes a work platform (1), with a horizontal support (2) and a vertical support (3) at the corners of the work platform (1). A robotic arm is provided on the outside of the work platform (1). The robotic arm is connected to a negative pressure suction cup (4) via a rotating seat and a lifting device. The negative pressure suction cup (4) has multiple suction holes (5) evenly distributed. The negative pressure suction cup (4) is hollow inside and connected to a negative pressure pump. A partition (6) is provided inside the negative pressure suction cup (4) via a moving device. During the movement of the partition (6), the area of ​​negative pressure generated by the negative pressure suction cup (4) changes from small to large.

2. The light guide plate film peeling device according to claim 1, characterized in that, The working platform (1) and the negative pressure suction cup (4) are arranged in two sets in a centrally symmetrical manner along the vertical axis with the robotic arm as the axis.

3. The light guide plate film peeling device according to claim 1, characterized in that, The rotating base includes a mounting base, and a servo motor (7) is provided on the top surface of the mounting base. The output end of the servo motor (7) causes the robotic arm to rotate in the horizontal direction. The servo motor (7) is electrically connected to the controller.

4. The light guide plate film peeling device according to claim 1, characterized in that, The lifting device includes a first hydraulic cylinder (8), which is vertically arranged. The output end of the first hydraulic cylinder (8) causes the negative pressure suction cup (4) to move up and down. The first hydraulic cylinder (8) is electrically connected to the controller.

5. The light guide plate film peeling device according to claim 1, characterized in that, The moving device includes a second hydraulic cylinder (9), which is fixedly installed on the outside of the negative pressure suction cup (4). The output end of the second hydraulic cylinder (9) is fixedly connected to the partition (6). The second hydraulic cylinder (9) is electrically connected to the controller, so that the partition (6) moves laterally inside the negative pressure suction cup (4), thereby gradually opening and closing multiple suction holes (5).

6. The light guide plate film peeling device according to claim 1, characterized in that, The work platform (1) is rectangular.

7. The light guide plate film peeling device according to claim 6, characterized in that, The negative pressure suction cup (4) is a hollow cuboid.

8. The light guide plate film peeling device according to claim 7, characterized in that, The partition (6) is slidably connected along the diagonal of the contact surface between the cuboid and the working platform (1).

9. The light guide plate film peeling device according to claim 1, characterized in that, The partition (6) is provided with a through hole (10), and the negative pressure suction cup (4) is provided with a slide rod (11) adapted to the through hole (10).

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