Stretching device for PET optical protective film

Abstract

The utility model provides a stretching device for a PET (Polyethylene Terephthalate) optical protective film, which belongs to the field of optical protective films and comprises a protective film body, and a stretching component is arranged above the protective film body. The vacuum chuck can quickly generate negative pressure, firmly fix the PET optical protective film on the vacuum chuck and provide highly stable clamping force, workpieces are adsorbed through the negative pressure, and a clamp or a mechanical clamping device is not needed, so that damage to the surfaces of the workpieces can be avoided, the vacuum chuck is relatively simple to mount and use, and the production efficiency is improved. And complex debugging and maintenance processes are not needed.

Description

Technical Field

[0001] The utility model relates to the field of optical protective films, in particular to a stretching device for PET optical protective films. Background Art

[0002] In the field of optical materials, PET (polyethylene terephthalate) optical protective film is widely used due to its excellent light transmittance, weather resistance, and mechanical properties. However, during the manufacturing process, PET film needs to undergo precise stretching to improve its physical and optical properties. Existing stretching devices for PET optical protective film still have the following defects:

[0003] Existing stretching devices for PET optical protective films usually use a clamp or a mechanical clamping device to clamp and fix the PET optical protective film, and then perform a certain amount of stretching, which can easily cause damage to the surface of the PET optical protective film.

[0004] Therefore, we have made improvements to this and proposed a stretching device for PET optical protective film. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the PET optical protective film is often clamped and fixed by a clamp or a mechanical clamping device and then stretched to a certain extent, which easily causes damage to the surface of the workpiece.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model provides the following technical solutions:

[0007] A stretching device for PET optical protective film is provided to improve the above problems.

[0008] The utility model is specifically as follows:

[0009] It comprises a protective film body, and a stretching component is arranged above the protective film body;

[0010] The stretching assembly includes a main frame, a chassis fixing frame, a vacuum pump, an electromagnetic regulating valve, a connecting pipe and a vacuum suction cup. The main frame is arranged above the protective film body, the chassis fixing frame is fixedly arranged at the bottom of the main frame, the vacuum pump is fixedly arranged at the top bottom side of the main frame, the electromagnetic regulating valves are in multiple groups and are respectively arranged on the vacuum pump and the chassis fixing frame, the connecting pipe is fixedly connected between the multiple groups of electromagnetic regulating valves, and the vacuum suction cup is fixedly arranged at the bottom of the chassis fixing frame and is connected to the connecting pipe.

[0011] As a preferred technical solution of the present invention, a connecting seat is fixedly provided on one side of the main frame, an adjusting rod is fixedly provided on one end of the connecting seat, and the adjusting rod is controlled to move by an external driving device.

[0012] As a preferred technical solution of the present invention, limit plates are provided on both sides of the protective film body, and the limit plates are in two groups and are symmetrically arranged on both sides of the protective film body.

[0013] As a preferred technical solution of the present invention, a workbench is fixedly provided at the bottom of the limiting plate, and the length and position of the limiting plate can be adjusted on the workbench.

[0014] As a preferred technical solution of the present invention, the number of the stretching components is four, and the stretching components are symmetrically arranged on the surface of the workbench.

[0015] As a preferred technical solution of the present invention, the area of ​​the chassis fixing frame is larger than the area of ​​the main frame, and the vacuum suction cups are evenly arranged in an array at the bottom of the chassis fixing frame.

[0016] As a preferred technical solution of the present invention, the vacuum suction cup is made of rubber material, and one end of the workbench is provided with a transition chamfer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the solution of the present utility model:

[0019] The set stretching component can quickly generate negative pressure to firmly fix the PET optical protective film on the vacuum suction cup, providing highly stable clamping force. Since the workpiece is adsorbed by negative pressure, no fixtures or mechanical clamping devices are required, thus avoiding damage to the surface of the PET optical protective film. The installation and use are relatively simple, and no complicated debugging and maintenance process is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a stretching device for PET optical protective film provided by the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the stretching device for PET optical protective film provided by the utility model;

[0022] Figure 3 A schematic diagram of the stretching assembly structure of a stretching device for PET optical protective film provided by the present invention;

[0023] Figure 4 A schematic diagram of the stretching assembly structure of a stretching device for PET optical protective film provided by the present invention;

[0024] Figure 5 This is a schematic diagram of the partial structure of the electromagnetic regulating valve and vacuum suction cup of the stretching device for PET optical protective film provided by the utility model.

[0025] Indicated in the figure:

[0026] 1. Protective film body; 2. Stretching assembly; 201. Main frame; 202. Chassis fixing frame; 203. Vacuum pump; 204. Solenoid regulating valve; 205. Connecting pipe; 206. Vacuum suction cup; 3. Connecting seat; 4. Adjusting rod; 5. Limiting plate; 6. Workbench. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0028] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] like Figure 1-5 As shown, this embodiment provides a stretching device for a PET optical protective film, comprising a protective film body 1, with a stretching assembly 2 disposed above the protective film body 1;

[0032] The stretching assembly 2 includes a main frame 201, a chassis fixing frame 202, a vacuum pump 203, an electromagnetic regulating valve 204, a connecting pipe 205 and a vacuum suction cup 206. The main frame 201 is arranged above the protective film body 1, the chassis fixing frame 202 is fixedly arranged at the bottom of the main frame 201, the vacuum pump 203 is fixedly arranged at the top bottom side of the main frame 201, the number of the electromagnetic regulating valves 204 is multiple and they are respectively arranged on the vacuum pump 203 and the chassis fixing frame 202, and the connecting pipe 205 is fixedly connected between the multiple groups of electromagnetic regulating valves 204 The vacuum suction cup 206 is fixedly arranged at the bottom of the chassis fixing frame 202 and is connected to the connecting pipe 205. When in use, the vacuum pump 203 and the vacuum suction cup 206 are connected to each other through the connecting pipe 205 and the electromagnetic regulating valve 204. The electromagnetic regulating valve 204 is used to control the pressure inside the multiple groups of connecting pipes 205 to change, and negative pressure is quickly generated to suck the PET optical protective film below. Then, the multiple groups of main frames 201 and the chassis fixing frame 202 are moved in multiple directions under external drive, and the position is changed to stretch the PET optical protective film.

[0033] like Figure 4 As shown, a connecting seat 3 is fixedly provided on one side of the main frame 201, and an adjusting rod 4 is fixedly provided on one end of the connecting seat 3. The adjusting rod 4 is controlled to move by an external driving device. The main frame 201 and the external driving device are connected to each other through the adjusting rod 4 and the connecting seat 3. The external driving device can drive the adjusting rod 4 to perform telescopic movement or multi-angle rotation movement, which is convenient for moving the main frame 201, thereby performing multi-directional stretching movement of the PET optical protective film. The external driving device can be an electric telescopic rod or a cylinder.

[0034] like Figure 2 As shown, limiting plates 5 are provided on both sides of the protective film body 1. There are two groups of limiting plates 5, which are symmetrically arranged on both sides of the protective film body 1. The limiting plates 5 are used to limit the two ends of the PET optical protective film to ensure that the PET optical protective film can remain stable during the input process.

[0035] like Figure 2 As shown, a workbench 6 is fixedly provided at the bottom of the limiting plate 5. The length and position of the limiting plate 5 can be adjusted on the workbench 6. The workbench 6 provides support for the external driving device to facilitate the overall work.

[0036] like Figure 2 As shown, there are four groups of stretching components 2, and the stretching components 2 are symmetrically arranged on the surface of the workbench 6. The symmetrical arrangement on the workbench 6 can ensure uniformity during the stretching process.

[0037] like Figure 3As shown, the area of ​​the chassis fixing frame 202 is larger than the area of ​​the main frame 201, and the vacuum suction cups 206 are evenly arranged in an array at the bottom of the chassis fixing frame 202. By increasing the area of ​​the chassis fixing frame 202, more vacuum suction cups 206 can be installed, which facilitates the adsorption of the PET optical protective film over a large area.

[0038] like Figure 3 As shown, the vacuum suction cup 206 is made of rubber material, and one end of the workbench 6 is set with a transition chamfer to facilitate the entry of the PET optical protective film from one end of the workbench 6 to provide certain protection for the PET optical protective film.

[0039] Specifically, when the stretching device for PET optical protective film is working: the vacuum pump 203 and the vacuum suction cup 206 are interconnected through the connecting pipe 205 and the electromagnetic regulating valve 204, and the electromagnetic regulating valve 204 is used to control and change the pressure inside the multiple groups of connecting pipes 205, and quickly generate negative pressure to suck the PET optical protective film below. The main frame 201 is connected to the external drive device through the adjusting rod 4 and the connecting seat 3. Since the external drive device is fixedly installed on the workbench 6 and can drive the adjusting rod 4 to perform telescopic movement or multi-angle rotation movement, it is convenient to move the main frame 201, and then the multiple groups of main frames 201 and the chassis fixing frame 202 are moved in multiple directions under external drive to appropriately stretch the PET optical protective film.

[0040] All technical features in this embodiment can be freely combined according to actual needs.

[0041] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A stretching device for PET optical protective film, comprising a protective film body (1), characterized in that: A stretching component (2) is provided above the protective film body (1); The stretching assembly (2) comprises a main frame (201), a chassis fixing frame (202), a vacuum pump (203), an electromagnetic regulating valve (204), a connecting pipe (205) and a vacuum suction cup (206); the main frame (201) is arranged above the protective film body (1); the chassis fixing frame (202) is fixedly arranged at the bottom of the main frame (201); the vacuum pump (203) is fixedly arranged at the bottom side of the top of the main frame (201); the electromagnetic regulating valves (204) are provided in multiple groups and are respectively arranged on the vacuum pump (203) and the chassis fixing frame (202); the connecting pipe (205) is fixedly connected between the multiple groups of electromagnetic regulating valves (204); the vacuum suction cup (206) is fixedly arranged at the bottom of the chassis fixing frame (202) and is connected to the connecting pipe (205).

2. A stretching device for PET optical protective film according to claim 1, characterized in that: A connecting seat (3) is fixedly provided on one side of the main frame (201), an adjusting rod (4) is fixedly provided on one end of the connecting seat (3), and the movement of the adjusting rod (4) is controlled by an external driving device.

3. A stretching device for PET optical protective film according to claim 1, characterized in that: Limiting plates (5) are provided on both sides of the protective film body (1), and the limiting plates (5) are provided in two groups and are symmetrically arranged on both sides of the protective film body (1).

4. A stretching device for PET optical protective film according to claim 3, characterized in that: A workbench (6) is fixedly provided at the bottom of the limiting plate (5), and the length and position of the limiting plate (5) can be adjusted on the workbench (6).

5. A stretching device for PET optical protective film according to claim 4, characterized in that: The number of the stretching components (2) is four groups, and the stretching components (2) are symmetrically arranged on the surface of the workbench (6).

6. A stretching device for PET optical protective film according to claim 1, characterized in that: The area of ​​the chassis fixing frame (202) is larger than the area of ​​the main frame (201), and the vacuum suction cups (206) are evenly arranged in an array at the bottom of the chassis fixing frame (202).

7. A stretching device for PET optical protective film according to claim 4, characterized in that: The vacuum suction cup (206) is made of rubber material, and one end of the workbench (6) is provided with a transition chamfer.

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