A protective film cutting and applying mechanism

Abstract

This application relates to a protective film cutting and application mechanism, including a protective film unwinding device, a first protective film pulling device, a protective film cutting device, a second protective film pulling device, a protective film transfer device, a protective film handling robot, and a protective film vision positioning device. The first pulling device pulls the film material a short distance from the unwinding point and fixes it at the cutting position; subsequently, the second pulling device clamps the front end of the film material, precisely pulls it to the set length to the cutting position, and tensions the film material; the cutting device then cuts the film material. This ensures precise control of the cutting length. The cut film is received by the transfer device, and the handling robot transports it to the vision positioning device for position and angle detection. The robot corrects its posture in real time based on visual feedback, and finally applies the film material with high precision to the designated position on the turntable application platform. This application realizes a closed-loop fully automated process from unwinding, fixed-length cutting, transfer, vision positioning to precise application, significantly improving production efficiency and application accuracy.

Description

Technical Field

[0001] This application relates to the field of protective film cutting and feeding equipment, and in particular to a protective film cutting and feeding mechanism. Background Technology

[0002] In the automated production of modern electronic products (such as mobile phone screens, tablet computers, and optical lenses), high-precision application of protective films is one of the key processes. Traditional protective film application mainly relies on manual operation or semi-automatic equipment, which suffers from problems such as low efficiency, poor positioning accuracy, and unstable yield.

[0003] In manual operation, operators need to manually pull the protective film from the roll, measure the length based on experience, cut it, and then transfer the cut protective film to the product surface for lamination. This method has significant drawbacks: manual operation is slow and difficult to match the pace of automated production lines; consistency in cut length is difficult to guarantee, and dimensional deviations are prone to occur.

[0004] To address the issue of manual labor, some automated equipment has emerged in the market, but the following technical bottlenecks still exist: single-section material pulling mechanisms are prone to cumulative errors due to fluctuations in film tension or slippage during long-distance traction, affecting the accuracy of the final cutting length. Utility Model Content

[0005] The purpose of this application is to provide an integrated, high-precision, and high-efficiency protective film cutting and film application mechanism.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A protective film cutting and applying mechanism includes a protective film roll unwinding device, a first protective film pulling device, a protective film cutting device, a second protective film pulling device, a protective film transfer device, a protective film handling robot, and a protective film vision positioning device. The first protective film pulling device is located between the protective film roll unwinding device and the protective film cutting device, and is used to pull the protective film released from the protective film roll unwinding device to the protective film cutting device. The second protective film pulling device is located on one side of the protective film cutting device, and is used to clamp the protective film pulled out by the first protective film pulling device and pull it to the length to be cut. The protective film cutting device is used to cut the protective film. The protective film transfer device is located on one side of the second protective film pulling device, and is used to receive the cut protective film. The protective film handling robot is used to transfer the protective film from the protective film transfer device to the protective film vision positioning device for positioning, and then transport it to the turntable film application platform.

[0008] Furthermore, the protective film roll unwinding device includes a first unwinding device and a second unwinding device, which are arranged vertically opposite to each other.

[0009] Furthermore, the first unwinding device includes a first active rotary unwinding assembly, at least one set of first driven guide rollers, and a first tensioning assembly. The first active rotary unwinding assembly is used to install the protective film of the roll and drive it to perform a rotary unwinding motion. The first driven guide roller is disposed on one side of the first active rotary unwinding assembly and is used to guide the unwound protective film into the first protective film pulling device. The first tensioning assembly is disposed on one side of the first driven guide roller and is used to tension the protective film.

[0010] Furthermore, the first active rotary unwinding assembly includes a first active unwinding roller and a first active drive device. The first active unwinding roller is mounted on the first active drive device and is used to mount the protective mold of the rolled material. The first active drive device is used to drive the first active unwinding roller to perform a rotary unwinding motion.

[0011] Furthermore, the first tensioning assembly includes a first tensioning roller and a first tensioning drive device. The first tensioning roller is mounted on the first tensioning drive device, and the first tensioning drive device is used to drive the first tensioning roller to perform lifting and lowering movements to adjust the tension of the protective film during conveying.

[0012] Furthermore, the first protective film pulling device includes a first upper pressure plate, a first lower pressure plate, a pressure plate lifting drive device, and a pressure plate traversing device. The first upper pressure plate is mounted on the pressure plate lifting drive device, and the pressure plate lifting drive device is mounted on the pressure plate traversing device. The first lower pressure plate is arranged vertically opposite to the first upper pressure plate and is mounted on the pressure plate traversing device. The pressure plate lifting drive device is used to drive the first upper pressure plate to approach the first lower pressure plate to clamp the protective film. The pressure plate traversing device is used to drive the first upper pressure plate and the first lower pressure plate to move to the second protective film pulling device after clamping the protective film.

[0013] Furthermore, the protective film cutting device includes a lower cutting blade, a cutting blade driving device, and an upper cutting blade. The lower cutting blade and the upper cutting blade are arranged downwards opposite each other, and the cutting blade driving device is used to drive the lower cutting blade to perform lifting and lowering cutting movements.

[0014] Furthermore, the lower cutting blade includes a guide portion and a cutting edge portion, wherein the guide portion extends upward from both ends of the cutting edge portion.

[0015] Furthermore, the second protective film pulling device includes a clamping air gripper and an air gripper traversing device. The clamping air gripper is mounted on the air gripper traversing device. After the clamping air gripper clamps the protective film, the air gripper traversing device drives the clamping air gripper to move the protective mold to the cutting length.

[0016] Furthermore, the protective film transfer device includes a protective film transfer platform and a platform lifting drive device. The protective film transfer platform is installed on the platform lifting drive device, and the platform lifting drive device drives the protective film transfer platform to move the protective film up and down.

[0017] The beneficial effects of this application are as follows:

[0018] (1) This application uses a first protective film pulling device to initially pull the film material a short distance to the cutting position, and then a second protective film pulling device clamps the film material and completes precise fixed-length pulling. This segmented pulling method completely avoids the tension fluctuation of the film material in traditional single-segment long-distance pulling, ensuring that the final cutting length accuracy is strictly controlled.

[0019] (2) This application integrates a closed-loop automated process from unwinding, traction, cutting, transfer, handling, and visual positioning. The cut film is delivered by a protective film handling robot to a protective film visual positioning device for position and angle detection, and the adhesive position of the protective film is corrected in real time accordingly. The entire process is highly automated, fast-paced, and greatly improves efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a protective film cutting and film application mechanism provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 A magnified view of a portion at point A.

[0022] Explanation of reference numerals in the attached figures:

[0023] 210. Protective film roll unwinding device; 220. First protective film pulling device; 230. Protective film cutting device; 240. Second protective film pulling device; 250. Protective film transfer device; 270. Protective film visual positioning device;

[0024] 211. First unwinding device; 212. Second unwinding device;

[0025] 2111, First active rotary unwinding assembly; 2112, First driven guide roller; 2113, First tensioning assembly; 2111a, First active unwinding roller; 2111b, First active drive device; 2113a, First tensioning roller; 2113b, First tensioning drive device;

[0026] 221. First upper pressure plate; 222. First lower pressure plate; 223. Pressure plate lifting drive device; 224. Pressure plate lateral movement device;

[0027] 231. Lower cutting blade; 232. Cutting blade drive device; 233. Upper cutting blade; 231a. Guide part; 231b. Blade part;

[0028] 241. Gripping pneumatic gripper; 242. Pneumatic gripper lateral movement device;

[0029] 251. Protective film transfer platform; 252. Platform lifting drive device; Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0032] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0033] A protective film cutting and loading mechanism includes a protective film unwinding device 210, a first protective film pulling device 220, a protective film cutting device 230, a second protective film pulling device 240, a protective film transfer device 250, a protective film handling robot (not shown in the figure), and a protective film vision positioning device 270. The first protective film pulling device 220 is disposed between the protective film unwinding device 210 and the protective film cutting device 230, and is used to pull the protective film released from the protective film unwinding device 210 to the protective film cutting device 230. The second protective film pulling device 240... Device 240 is located on one side of protective film cutting device 230 and is used to clamp the protective film pulled out by first protective film pulling device 220 and pull it to the length to be cut. Protective film cutting device 230 is used to cut the protective film. Protective film transfer device 250 is located on one side of second protective film pulling device 240 and is used to receive the cut protective film. Protective film handling robot (not shown in the figure) is used to transfer the protective film from protective film transfer device 250 to protective film vision positioning device 270 for positioning, and then transport it to turntable film application platform.

[0034] The specific working method of the protective film cutting and film application mechanism is as follows:

[0035] The roll of protective film is installed on the protective film roll unwinding device 210. The free end of the film material is fed into the first protective film pulling device 220. The first protective film pulling device 220 pulls the film material out of the unwinding device and pulls it to the protective film cutting device 230. The first protective film pulling device 220 fixes the film material at this position.

[0036] The second protective film pulling device 240 clamps the portion of the film material extending from the cutter, while the first pulling device releases its grip on the film material. The second protective film pulling device 240 then begins to pull the film material from the direction of the first pulling device towards itself, i.e., away from the protective film cutting device 230. It precisely pulls the film for a set length, which is the final required length of the protective film. At this point, the film material is tensioned at the cutter position.

[0037] After the second pulling device completes the fixed-length pulling and the film material is straightened and tensioned, the first protective film pulling device 220 clamps the main protective film again, and then the protective film cutting device 230 moves instantly; the cutter cleanly cuts the film material at the predetermined cutting line; at this time, the second pulling device releases the front end of the newly cut protective film; the cut protective film is located on the surface of the protective film transfer device 250;

[0038] A protective film handling robot (not shown in the figure) moves above the protective film transfer device 250 and picks up a protective film sheet from the transfer station. The robot then transports the picked-up protective film sheet above the protective film vision positioning device 270. The vision positioning device (including a camera and a light source) takes a picture of the protective film sheet in the robot's grasping state. Based on the deviation data provided by the vision system, the robot adjusts the position and posture of its end effector in real time. After compensation, the robot precisely transports the protective film sheet to the designated film application position on the turntable film application platform.

[0039] In one embodiment, the protective film roll unwinding device 210 includes a first unwinding device 211 and a second unwinding device 212, which are arranged vertically opposite to each other. This dual unwinding device significantly improves equipment utilization and production efficiency; it allows for seamless switching between different specifications or types of protective film rolls during production (e.g., quickly switching to another roll when one is used up), or simultaneous supply of materials for different needs, reducing downtime for roll changes.

[0040] In one embodiment, the first unwinding device 211 includes a first active rotary unwinding assembly 2111, at least one set of first driven guide rollers 2112, and a first tensioning assembly 2113. The first active rotary unwinding assembly 2111 is used to mount the protective film of the roll and drive it to perform a rotary unwinding motion. The first driven guide rollers 2112 are disposed on one side of the first active rotary unwinding assembly 2111 and are used to guide the unwound protective film into the first protective film pulling device 220. The first tensioning assembly 2113 is disposed on one side of the first driven guide rollers 2112 and is used to tension the protective film. In this embodiment, the first active drive unwinding provides a stable power source to prevent the film material from loosening due to inertia; the guide rollers ensure that the film material path is accurate and without deviation; the tensioning assembly dynamically adjusts the tension in real time to ensure that the film material is always in a controlled taut state during the conveying process, laying the foundation for subsequent accurate pulling and cutting.

[0041] In one embodiment, the first active rotary unwinding assembly 2111 includes a first active unwinding roller 2111a and a first active drive device 2111b. The first active unwinding roller 2111a is mounted on the first active drive device 2111b and is used to mount the protective mold of the roll material. The first active drive device 2111b is used to drive the first active unwinding roller 2111a to perform a rotary unwinding motion. The unwinding speed is precisely controlled by a drive device such as a motor, and works in conjunction with the feeding device to achieve uniform and controllable feeding, preventing film accumulation or excessive stretching. The dedicated unwinding roller ensures that the roll material is securely mounted and rotates smoothly.

[0042] In one embodiment, the first tensioning assembly 2113 includes a first tensioning roller 2113a and a first tensioning drive device 2113b. The first tensioning roller 2113a is mounted on the first tensioning drive device 2113b, which drives the first tensioning roller 2113a to move up and down to adjust the tension of the protective film during transport. By controlling the lifting and lowering of the tensioning roller through a drive device (such as a cylinder or motor), it is possible to respond quickly and sensitively to changes in film tension (such as unwinding start / stop, speed changes, and uneven film thickness), dynamically maintaining a constant ideal tension. This is crucial for the smooth transport and high-quality cutting of the protective film.

[0043] In one embodiment, the first protective film pulling device 220 includes a first upper pressure plate 221, a first lower pressure plate 222, a pressure plate lifting drive device 223, and a pressure plate traversing device 224. The first upper pressure plate 221 is mounted on the pressure plate lifting drive device 223, and the pressure plate lifting drive device 223 is mounted on the pressure plate traversing device 224. The first lower pressure plate 222 is arranged vertically opposite to the first upper pressure plate 221 and is mounted on the pressure plate traversing device 224. The pressure plate lifting drive device 223 is used to drive the first upper pressure plate 221 to approach the first lower pressure plate 222 to clamp the protective film. The pressure plate traversing device 224 is used to drive the first upper pressure plate 221 and the first lower pressure plate 222 to move to the second protective film pulling device 240 after clamping the protective film. The first upper pressure plate 221 and the first lower pressure plate 222 provide strong and reliable clamping force to ensure that the film material is firmly fixed and does not slip before initial positioning and cutting; the transverse movement device (such as a precision lead screw module) drives the entire clamping mechanism to move precisely, accurately positioning the front end of the film material to the designated position after the cutter, providing an accurate starting point for the fixed-length pulling of the second pulling device.

[0044] In one embodiment, the protective film cutting device 230 includes a lower cutting blade 231, a cutting blade driving device 232, and an upper cutting blade 233. The lower cutting blade 231 and the upper cutting blade 233 are arranged downwards opposite each other. The cutting blade driving device 232 is used to drive the lower cutting blade 231 to perform a lifting and lowering cutting motion. The upper and lower opposing cutting blades, together with a powerful driving device (such as a cylinder), can generate instantaneous and clean shearing force, achieving high-quality cutting without burrs or deformation under the tension of the film material, and ensuring the neatness of the edges.

[0045] In one embodiment, the lower cutting blade 231 includes a guide portion 231a and a cutting edge portion 231b, with the guide portion 231a extending upward from both ends of the cutting edge portion 231b. Before the cutting blade descends to make cuts, the upwardly extending guide portion 231a ensures the cutting position of the lower cutting blade 231, effectively preventing the lower cutting blade 231 from shifting during its rise and fall.

[0046] In one embodiment, the second protective film pulling device 240 includes a clamping gripper 241 and a gripper traversing device 242. The clamping gripper 241 is mounted on the gripper traversing device 242. After the clamping gripper 241 clamps the protective film, the gripper traversing device 242 drives the clamping gripper 241 to move the protective film to the cutting length. The clamping gripper 241 operates quickly, clamps reliably, and causes minimal damage to the film material.

[0047] In one embodiment, the protective film transfer device 250 includes a protective film transfer platform 251 and a platform lifting drive device 252. The protective film transfer platform 251 is mounted on the platform lifting drive device 252, which drives the protective film transfer platform 251 to move the protective film up and down. The lifting drive allows the transfer platform to flexibly adjust its height: after cutting, it can rise to receive the film; when the robot arm picks it up, it can lower or maintain a suitable height, facilitating the robot arm (especially with suction cups) to reliably and without interference pick up the film; the platform itself provides a stable temporary storage and positioning reference for the film, improving the success rate of pickup.

[0048] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A protective film cutting and film application mechanism, characterized in that: It includes a protective film roll unwinding device, a first protective film pulling device, a protective film cutting device, a second protective film pulling device, a protective film transfer device, a protective film handling robot, and a protective film vision positioning device; The first protective film pulling device is located between the protective film unwinding device and the protective film cutting device, and is used to pull the protective film released from the protective film unwinding device to the protective film cutting device. The second protective film pulling device is located on one side of the protective film cutting device, and is used to clamp the protective film pulled out by the first protective film pulling device and pull it to the length to be cut. The protective film cutting device is used to cut the protective film. The protective film transfer device is located on one side of the second protective film pulling device, and is used to receive the cut protective film. The protective film handling robot is used to transfer the protective film from the protective film transfer device to the protective film vision positioning device for positioning, and then transport it to the turntable film application platform.

2. The protective film cutting and film application mechanism according to claim 1, characterized in that: The protective film roll unwinding device includes a first unwinding device and a second unwinding device, which are arranged vertically opposite to each other.

3. The protective film cutting and film application mechanism according to claim 2, characterized in that: The first unwinding device includes a first active rotary unwinding assembly, at least one set of first driven guide rollers, and a first tensioning assembly. The first active rotary unwinding assembly is used to install the protective film of the roll and drive it to perform a rotary unwinding motion. The first driven guide roller is disposed on one side of the first active rotary unwinding assembly and is used to guide the unwound protective film into the first protective film pulling device. The first tensioning assembly is disposed on one side of the first driven guide roller and is used to tension the protective film.

4. The protective film cutting and film application mechanism according to claim 3, characterized in that: The first active rotary unwinding assembly includes a first active unwinding roller and a first active drive device. The first active unwinding roller is mounted on the first active drive device and is used to mount the protective mold of the rolled material. The first active drive device is used to drive the first active unwinding roller to perform a rotary unwinding motion.

5. The protective film cutting and film application mechanism according to claim 3, characterized in that: The first tensioning assembly includes a first tensioning roller and a first tensioning drive device. The first tensioning roller is mounted on the first tensioning drive device, and the first tensioning drive device is used to drive the first tensioning roller to perform lifting and lowering movements to adjust the tension of the protective film during conveying.

6. The protective film cutting and film application mechanism according to claim 1, characterized in that: The first protective film pulling device includes a first upper pressure plate, a first lower pressure plate, a pressure plate lifting drive device, and a pressure plate traversing device. The first upper pressure plate is mounted on the pressure plate lifting drive device, and the pressure plate lifting drive device is mounted on the pressure plate traversing device. The first lower pressure plate is arranged vertically opposite to the first upper pressure plate and is mounted on the pressure plate traversing device. The pressure plate lifting drive device is used to drive the first upper pressure plate to approach the first lower pressure plate to clamp the protective film. The pressure plate traversing device is used to drive the first upper pressure plate and the first lower pressure plate to move to the second protective film pulling device after clamping the protective film.

7. The protective film cutting and film application mechanism according to claim 1, characterized in that: The protective film cutting device includes a lower cutting blade, a cutting blade driving device, and an upper cutting blade. The lower cutting blade and the upper cutting blade are arranged downwards opposite each other. The cutting blade driving device is used to drive the lower cutting blade to perform lifting and lowering cutting movements.

8. The protective film cutting and film application mechanism according to claim 7, characterized in that: The lower cutting blade includes a guide portion and a cutting edge portion, wherein the guide portion extends upward from both ends of the cutting edge portion.

9. A protective film cutting and film application mechanism according to claim 1, characterized in that: The second protective film pulling device includes a clamping gripper and a gripper traversing device. The clamping gripper is mounted on the gripper traversing device. After the clamping gripper clamps the protective film, the gripper traversing device drives the clamping gripper to move the protective mold to the cutting length.

10. A protective film cutting and film application mechanism according to claim 9, characterized in that: The protective film transfer device includes a protective film transfer platform and a platform lifting drive device. The protective film transfer platform is installed on the platform lifting drive device, and the platform lifting drive device drives the protective film transfer platform to move the protective film up and down.

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