High-precision protective film anti-aging performance detection equipment

Abstract

The invention discloses a high-precision protective film anti-aging performance detection device, and relates to the technical field of protective film performance detection, the high-precision protective film anti-aging performance detection device comprises a box body, one side of the box body is provided with a tension dynamic compensation sealing mechanism and a fixed anti-loosening mechanism, the bottom of the box body is provided with a moving mechanism, one side of the box body is provided with a PLC controller, and the PLC controller is connected with the box body. And a wiring end of the PLC is connected with a flat cable in the equipment. According to the high-precision protective film anti-aging performance detection equipment, by arranging the tension dynamic compensation sealing mechanism, it is ensured that the sealing strip can be attached to the box body with enough pressure all the time, leakage of an aging detection environment in the box body is avoided, the accuracy of anti-aging detection is improved, and the problems that an existing device and a box door are single in sealing compensation mode and poor in sealing performance are solved. The problems that when the sealing strip is seriously abraded or deformed due to long-term use, the tension of the tension springs cannot be dynamically adjusted, the sealing pressure is insufficient, the internal aging environment of the box body leaks, and the detection accuracy is influenced are solved by only depending on the fixed tension of the second tension springs.

Description

Technical Field

[0001] This invention relates to the field of protective film performance testing technology, specifically a high-precision protective film aging resistance testing device. Background Technology

[0002] In the fields of electronics, optics, and building materials, protective films need to be exposed to the natural environment for a long time. Their aging resistance directly affects the service life and quality of the protected products. After the protective film is produced, in order to test its aging resistance, it is generally necessary to put the protective film into relevant testing equipment for aging resistance testing, so as to analyze the aging resistance of the protective film.

[0003] For example, the Chinese announcement number CN219758035U discloses a release film aging resistance testing device, which states in its specification that "this utility model discloses a release film aging resistance testing device, including a box body and a box door. The box door is located on one side of the box body. Two fixing frames are fixedly connected to the outer wall of one side of the box body. Rectangular holes are opened on both sides of the fixing frames. A slider is slidably connected inside the rectangular holes. Two connecting frames are fixedly connected to one side of the box door. U-shaped frames are rotatably connected to both ends of the connecting frames. The U-shaped frames are fixed to the sliders. A second tension spring is fixedly connected to one side of the U-shaped frame. The second tension spring is fixed to the fixing frame. A wedge block is fixedly connected to one side of the U-shaped frame."

[0004] However, the existing devices have the following shortcomings during use:

[0005] The existing device not only maintains a tight contact between the door and the enclosure through the second tension spring and the U-shaped frame, improving the sealing effect, but also prevents the U-shaped frame from moving forward through the sliding plate, wedge block, and rack, improving the fixation effect. It can also fix the door through the locking mechanism, improving the usage effect of the device. However, the door sealing compensation method is simple, relying only on the fixing tension of the second tension spring. When the sealing strip is severely worn or deformed due to long-term use, the tension of the spring cannot be dynamically adjusted, which can easily lead to insufficient sealing pressure, leakage of the aging environment inside the enclosure, and affect the accuracy of detection.

[0006] Therefore, we propose a high-precision protective film aging resistance testing device to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a high-precision protective film aging resistance testing device. A pressure sensor can monitor the sealing pressure between the door sealing strip and the box body in real time and transmit the signal to a PLC controller. When the sealing strip wears or deforms due to long-term use, resulting in insufficient sealing pressure, the PLC controller will control the servo motor to start, driving the first threaded rod to rotate. This causes the moving plate to move along the guide rod, and then the movable rod pulls the compensation plate to adjust the tension of the tension spring. The tension of the tension spring is transmitted to the door through the second U-shaped frame and the rotating block, further pressing the sealing strip against the box body, thus solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-precision protective film aging resistance testing device, comprising a housing, wherein a tension dynamic compensation sealing mechanism and a fixing anti-loosening mechanism are provided on one side of the housing, a moving mechanism is provided at the bottom of the housing, and a PLC controller is installed on one side of the housing, wherein the wiring terminals of the PLC controller are connected to the internal wiring of the device;

[0009] The tension dynamic compensation sealing mechanism includes two first U-shaped frames and two fixed plates installed on one side of the housing. Two second U-shaped frames and two compensation plates are arranged inside the two first U-shaped frames. Two rotating blocks are rotatably installed inside the two second U-shaped frames. A housing door is fixedly connected to one side of each of the rotating blocks. A sealing strip is installed on one side of each housing door. Two tension springs are fixedly connected between the two second U-shaped frames and the two compensation plates. A first threaded rod is rotatably connected between the two fixed plates. A guide rod is fixedly connected between the two fixed plates. A servo motor for driving the first threaded rod to rotate is fixedly installed on one side of one of the fixed plates. A movable plate is threaded onto the outer surface of the first threaded rod and the guide rod. Two movable rods are fixedly connected to one side of the movable plate. One end of each movable rod movably passes through the two first U-shaped frames and is fixedly connected to the two compensation plates. Multiple pressure sensors are embedded on one side of the housing.

[0010] Preferably, a connecting block is fixedly connected to one side of the box door, and an internal threaded block is fixedly connected to one side of the box body. An installation groove is provided on one side of the internal threaded block, and a movable frame is rotatably installed inside the installation groove.

[0011] Preferably, a guide groove is provided on one side of the movable frame, a slide plate is slidably connected in the guide groove, a second threaded rod is rotatably installed on one side of the slide plate, the second threaded rod is inserted into the connecting block, and one end of the second threaded rod is threaded to the inner surface of the internal thread block, and a rotating cap is installed on one end of the second threaded rod.

[0012] Preferably, four first limiting grooves are provided on the inner side of the two first U-shaped frames, and four first limiting blocks are slidably connected in the four first limiting grooves, and the four first limiting blocks are fixedly connected to the two second U-shaped frames.

[0013] Preferably, four second limiting grooves are provided on the inner sides of the two first U-shaped frames, and four second limiting blocks are slidably connected in the four second limiting grooves, and the four second limiting blocks are fixedly connected to the two compensation plates.

[0014] Preferably, the fixing and anti-loosening mechanism includes two mounting plates fixedly connected to one side of the housing, wherein an electromagnet is installed on the bottom of one mounting plate and the top of the other mounting plate.

[0015] Preferably, a third U-shaped frame is fixedly connected to the top of one of the first limiting blocks and the bottom of the other first limiting block, and four vertical rods are provided on the inner side of the two third U-shaped frames, with four limiting discs fixedly connected to one end of each of the four vertical rods.

[0016] Preferably, four return springs are sleeved on the outer surface of the four vertical rods, and one end of the four vertical rods movably passes through two third U-shaped frames and is fixedly connected to two support plates. The top of one support plate and the bottom of the other support plate are fixedly connected to connecting irons.

[0017] Preferably, the moving mechanism includes a base installed at the bottom of the housing, an electric push rod installed on the inner top of the base, a lifting plate fixedly connected to the telescopic end of the electric push rod, and four casters installed at the bottom of the lifting plate, with the four casters moving through the base.

[0018] Preferably, the base has two third limiting grooves on its inner side, and two third limiting blocks are slidably connected in the two third limiting grooves, and the two third limiting blocks are fixedly connected to the lifting plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention, through the setting of a dynamic tension compensation sealing mechanism, allows a pressure sensor to monitor the sealing pressure between the door sealing strip and the box body in real time and transmit the signal to the PLC controller. When the sealing strip wears or deforms due to long-term use, resulting in insufficient sealing pressure, the PLC controller will control the servo motor to start, driving the first threaded rod to rotate, which in turn moves the moving plate along the guide rod. This, in turn, pulls the compensation plate through the movable rod to adjust the tension of the tension spring. The tension of the tension spring is transmitted to the door through the second U-shaped frame and the rotating block, further pressing the sealing strip against the box body. This ensures that the sealing strip always fits the box body with sufficient pressure, preventing leakage of the aging detection environment inside the box body, improving the accuracy of aging resistance testing, and solving the problem of existing devices having a single door sealing compensation method that relies solely on the fixed tension of the second tension spring. When the sealing strip suffers severe wear or deformation due to long-term use, the tension of the tension spring cannot be dynamically adjusted, easily leading to insufficient sealing pressure, leakage of the aging environment inside the box body, and affecting the accuracy of testing.

[0021] 2. This invention further enhances the stability of the door after it is closed by setting a fixed anti-loosening mechanism, preventing the door from loosening during the testing process and affecting the sealing effect. After the door is closed and the initial sealing is completed, the electromagnet is energized to generate magnetism, attracting the connecting iron at the corresponding position, which drives the support plate and vertical rod to move along the third U-shaped frame. With the elastic force of the return spring, the second U-shaped frame and the door can be double fixed and limited. Even if the equipment vibrates slightly during operation, the door can be prevented from shifting or loosening, ensuring the stability of the testing environment and further improving the overall reliability of the equipment.

[0022] 3. This invention, through the setting of a moving mechanism, allows the PLC controller to control the extension of the electric push rod when the equipment needs to be moved, pushing the lifting plate down along the third limit groove, so that the caster wheels extend out of the base and contact the ground. At this time, the equipment can be easily pushed to the target position. When the equipment reaches the designated position, the electric push rod retracts, driving the lifting plate and caster wheels back into the base, so that the base directly contacts the ground, ensuring the stable placement of the equipment and avoiding shaking of the equipment during the testing process. This balances the needs for convenient movement and stable placement of the equipment, improves the flexibility of equipment use, and adapts to the site requirements of different testing scenarios. Attached Figure Description

[0023] Figure 1 This is a perspective view of the main structure of a high-precision protective film aging resistance testing device according to the present invention;

[0024] Figure 2 This is a three-dimensional view of the right side of a high-precision protective film aging resistance testing device according to the present invention;

[0025] Figure 3 This is a perspective view of the bottom structure of a high-precision protective film aging resistance testing device according to the present invention;

[0026] Figure 4 This is a partial rear-side perspective view of a high-precision protective film aging resistance testing device according to the present invention;

[0027] Figure 5 This is a three-dimensional cross-sectional view of the base in a high-precision protective film aging resistance testing device of the present invention;

[0028] Figure 6 This is a three-dimensional view of a portion of the housing structure in a high-precision protective film aging resistance testing device of the present invention;

[0029] Figure 7 This is a three-dimensional view of the door structure in a high-precision protective film aging resistance testing device of the present invention;

[0030] Figure 8 This is a perspective view of the unfolded structure of the connecting block and the second threaded rod in a high-precision protective film aging resistance testing device of the present invention;

[0031] Figure 9 for Figure 4 Enlarged 3D view of the structure at point B in the middle;

[0032] Figure 10 for Figure 1 Enlarged 3D view of the structure at point A in the middle.

[0033] In the diagram: 1. Housing; 2. Dynamic tension compensation sealing mechanism; 201. First U-shaped frame; 202. Fixing plate; 203. Second U-shaped frame; 204. Rotating block; 205. Housing door; 206. Sealing strip; 207. Compensation plate; 208. Tension spring; 209. First threaded rod; 210. Guide rod; 211. Servo motor; 212. Moving plate; 213. Movable rod; 214. Pressure sensor; 215. Connecting block; 216. Internal threaded block; 217. Mounting groove; 218. Movable frame; 219. Guide groove; 220. Slide plate; 221. Second threaded rod 1. Patterned rod; 222. Rotating cap; 223. First limiting groove; 224. First limiting block; 225. Second limiting groove; 226. Second limiting block; 3. Fixing and anti-loosening mechanism; 301. Mounting plate; 302. Electromagnet; 303. Third U-shaped frame; 304. Vertical rod; 305. Limiting plate; 306. Return spring; 307. Support plate; 308. Connecting iron; 4. Moving mechanism; 401. Base; 402. Electric push rod; 403. Lifting plate; 404. Universal wheel; 405. Third limiting groove; 406. Third limiting block; 5. PLC controller. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1-10 As shown, the present invention provides a technical solution: a high-precision protective film aging resistance testing device, including a housing 1, a tension dynamic compensation sealing mechanism 2 and a fixing anti-loosening mechanism 3 are provided on one side of the housing 1, a moving mechanism 4 is provided at the bottom of the housing 1, and a PLC controller 5 is installed on one side of the housing 1, with the wiring terminals of the PLC controller 5 connected to the internal wiring of the device.

[0036] The tension dynamic compensation sealing mechanism 2 includes two first U-shaped frames 201 and two fixed plates 202 installed on one side of the housing 1. Two second U-shaped frames 203 and two compensation plates 207 are arranged inside the two first U-shaped frames 201. Two rotating blocks 204 are rotatably mounted inside the two second U-shaped frames 203. A housing door 205 is fixedly connected to one side of each rotating block 204. A sealing strip 206 is installed on one side of the housing door 205. Two tension springs 208 are fixedly connected between the two second U-shaped frames 203 and the two compensation plates 207. The two fixed plates 202 rotate... A first threaded rod 209 is dynamically connected, and a guide rod 210 is fixedly connected between two fixed plates 202. A servo motor 211 for driving the first threaded rod 209 to rotate is fixedly installed on one side of one of the fixed plates 202. A movable plate 212 is threadedly installed on the outer surface of the first threaded rod 209 and the guide rod 210. Two movable rods 213 are fixedly connected to one side of the movable plate 212. One end of the two movable rods 213 movably passes through the two first U-shaped frames 201 and is fixedly connected to the two compensation plates 207. Multiple pressure sensors 214 are embedded on one side of the housing 1.

[0037] like Figure 1 , Figure 7 and Figure 8 As shown, a connecting block 215 is fixedly connected to one side of the box door 205, and an internal thread block 216 is fixedly connected to one side of the box body 1. An installation groove 217 is provided on one side of the internal thread block 216, and a movable frame 218 is rotatably installed on the inner side of the installation groove 217. The connecting block 215 and the internal thread block 216 cooperate to provide a connection base for the second threaded rod 221.

[0038] like Figure 1 , Figure 7 and Figure 8As shown, a guide groove 219 is provided on one side of the movable frame 218. A slide plate 220 is slidably connected in the guide groove 219. A second threaded rod 221 is rotatably mounted on one side of the slide plate 220. The second threaded rod 221 is inserted into the connecting block 215, and one end of the second threaded rod 221 is threaded to the inner surface of the internal thread block 216. A rotating cap 222 is installed on one end of the second threaded rod 221. By rotating the rotating cap 222, the second threaded rod 221 can be driven to move along the internal thread block 216. The sliding of the slide plate 220 in the guide groove 219 drives the box. Door 205 is tightly fitted to box 1, and the self-locking nature of the threaded connection ensures that the initial sealing state of door 205 is stable. Movable frame 218 is rotatably installed in mounting groove 217, so that movable frame 218, slide plate 220, second threaded rod 221 and rotating cap 222 form a linked whole, always maintaining connection with box 1. When opening box door 205, movable frame 218 can be rotated to drive second threaded rod 221 to move synchronously, avoiding the loss of traditional detachable screw due to frequent disassembly. At the same time, movable frame 218 can flexibly adjust the angle with box door 205, taking into account both fixed reliability and operation convenience.

[0039] like Figure 1 , Figure 6 , Figure 7 and Figure 10 As shown, four first limiting grooves 223 are provided on the inner side of the two first U-shaped frames 201. Four first limiting blocks 224 are slidably connected in the four first limiting grooves 223, and the four first limiting blocks 224 are fixedly connected to the two second U-shaped frames 203. The first limiting grooves 223 and the first limiting blocks 224 cooperate to form an directional constraint on the second U-shaped frames 203, so that when the second U-shaped frames 203 rotate with the door 205 or are pulled by the tension spring 208, they can only slide along the first limiting grooves 223, effectively preventing lateral displacement or tilting. This constraint ensures that the opening and closing trajectory of the rotating block 204 driving the door 205 is stable, and avoids the sealing strip 206 from being misaligned with the box body 1 due to the displacement of the second U-shaped frame 203. This ensures the accuracy of the pressure sensor 214 in monitoring the sealing pressure, provides a stable structural reference for the tension dynamic compensation sealing mechanism 2, and ensures effective adjustment of the sealing pressure.

[0040] like Figure 1 , Figure 7 and Figure 10As shown, four second limiting grooves 225 are provided on the inner side of the two first U-shaped frames 201. Four second limiting blocks 226 are slidably connected in the four second limiting grooves 225, and the four second limiting blocks 226 are fixedly connected to the two compensation plates 207. The second limiting grooves 225 and the second limiting blocks 226 provide guidance for the compensation plates 207, so that when the compensation plates 207 drive the tension spring 208 to adjust the tension, they can only move along the second limiting grooves 225, avoiding tilting or deviation. This ensures that the tension of the tension spring 208 is evenly applied to the second U-shaped frame 203 in the set direction, so that the contact pressure between the sealing strip 206 and the box 1 is evenly distributed, preventing local sealing pressure abnormalities caused by the deviation of the compensation plate 207, improving the accuracy of the dynamic tension compensation sealing mechanism 2, and ensuring the overall sealing consistency of the box 1.

[0041] like Figure 1 , Figure 7 and Figure 9 As shown, the fixing and anti-loosening mechanism 3 includes two mounting plates 301 fixedly connected to one side of the housing 1. An electromagnet 302 is installed on the bottom of one mounting plate 301 and the top of the other mounting plate 301. The mounting plates 301 provide a stable mounting carrier for the electromagnet 302, ensuring that the position of the electromagnet 302 is fixed and accurately aligned with the connecting iron 308, avoiding adsorption failure due to unstable installation. The electromagnet 302 generates magnetism by being energized to achieve non-contact rapid limiting. It can start adsorption immediately after the housing door 205 is initially sealed. The response speed is faster than that of traditional mechanical locks, effectively preventing the housing door 205 from loosening due to vibration in the early stage of equipment operation. At the same time, the controllability of the electromagnet 302's power supply and deactivation means that the housing door 205 does not need to be disassembled when it is opened, simplifying the operation process and improving the ease of use of the equipment.

[0042] like Figure 1 and Figure 9 As shown, a third U-shaped frame 303 is fixedly connected to the top of one of the first limiting blocks 224 and the bottom of the other first limiting block 224. Four vertical rods 304 are provided on the inner side of the two third U-shaped frames 303. Four limiting plates 305 are fixedly connected to one end of the four vertical rods 304. The third U-shaped frame 303 provides a rigid mounting and guiding frame for the vertical rods 304, limiting the vertical rods 304 to move only in the vertical direction, avoiding the vertical rods 304 from shifting and causing the support plate 307 to misalign with the second U-shaped frame 203. The limiting plates 305 can prevent the vertical rods 304 from coming out of the third U-shaped frame 303 under the elastic force of the return spring 306, ensuring the connection stability between the vertical rods 304 and the support plate 307. The two work together to ensure that the force of the vertical rods 304 is evenly transmitted to the support plate 307, ensuring the adsorption and fit of the connecting iron 308 and the electromagnet 302, avoiding the failure of the limiting due to the loosening of the vertical rods 304, and strengthening the reliability of the fixing and anti-loosening mechanism 3.

[0043] like Figure 1 , Figure 7 and Figure 9 As shown, four return springs 306 are fitted on the outer surfaces of the four vertical rods 304. One end of each vertical rod 304 passes through two third U-shaped frames 303 and is fixedly connected to two support plates 307. A connecting iron 308 is fixedly connected to the top of one support plate 307 and the bottom of the other support plate 307. The return springs 306 have a dual function: when the electromagnet 302 is de-energized after the test, the return springs 306 can push the vertical rods 304, support plates 307 and connecting irons 308 to automatically reset, releasing the restriction on the second U-shaped frame 203, and the door 205 can be opened without manual operation; when the electromagnet 302 is energized and attracts, the elasticity of the return springs 306 can buffer the impact force of the attraction moment, avoiding hard contact between the connecting iron 308 and the electromagnet 302, which would cause wear on the components and extend the service life of the mechanism; the precise attraction between the connecting iron 308 and the electromagnet 302 forms a rigid constraint, blocking the displacement path of the door 205 and ensuring the continuity of the sealing state during the test.

[0044] like Figure 1 and Figure 5 As shown, the moving mechanism 4 includes a base 401 installed at the bottom of the housing 1. An electric push rod 402 is installed on the inner top of the base 401. A lifting plate 403 is fixedly connected to the telescopic end of the electric push rod 402. Four casters 404 are installed at the bottom of the lifting plate 403, and the four casters 404 move through the base 401. The base 401 provides a stable support foundation for the equipment, preventing swaying due to unstable support during operation. The electric push rod 402 drives the lifting plate 403 to realize the automatic extension and retraction of the casters 404. When moving the equipment, the casters 404 extend to touch the ground, and the 360° turning function allows for flexible handling of narrow spaces or corners. When fixing the equipment, the casters 404 retract into the base 401, so that the base 401 directly contacts the ground, ensuring the stability of the equipment and improving the adaptability of the equipment to different testing scenarios.

[0045] like Figure 1 and Figure 5 As shown, two third limiting grooves 405 are provided on the inner side of the base 401. Two third limiting blocks 406 are slidably connected in the two third limiting grooves 405, and the two third limiting blocks 406 are fixedly connected to the lifting plate 403. The movement of the lifting plate 403 is constrained by the third limiting grooves 405 and the third limiting blocks 406, preventing the lifting plate 403 from shifting laterally or tilting under the drive of the electric push rod 402. This constraint ensures that the four casters 404 extend or retract from the base 401 synchronously, avoiding the situation where some casters 404 cannot touch the ground or cannot be fully retracted due to the displacement of the lifting plate 403. This ensures the stability of the equipment when moving and the support stability when fixed, and prevents the equipment from shaking due to uneven force on the casters 404 during the testing process, which would affect the testing accuracy.

[0046] The usage and working principle of this device: During the equipment moving and fixing stage, if the equipment needs to be moved, the electric push rod 402 of the moving mechanism 4 is started by the PLC controller 5. The electric push rod 402 extends and pushes the lifting plate 403 down along the third limit groove 405, so that the caster wheel 404 extends out of the base 401 and contacts the ground. After the equipment is pushed to the target position, the electric push rod 402 is retracted by the PLC controller 5, which drives the caster wheel 404 to retract into the base 401. The base 401 directly contacts the ground to achieve stable placement.

[0047] During the placement of the protective film to be tested, the rotating cap 222 is rotated, causing the second threaded rod 221 to rotate along the inner surface of the internal threaded block 216, gradually disengaging the second threaded rod 221 from the internal threaded block 216 and the connecting block 215. Subsequently, the movable frame 218 rotates around the internal threaded block 216, and then the box door 205 is pulled to rotate outward around the rotating block 204. The box door 205 drives the rotating block 204 to rotate within the second U-shaped frame 203, thereby opening the box door 205. Simultaneously, under the tension of the tension spring 208... The tension spring 208 pulls the second U-shaped frame 203, causing the first limiting block 224 to move within the first limiting groove 223. The second U-shaped frame 203 moves to one side within the first U-shaped frame 201 until the door 205 is fully opened. Then, the protective film to be tested is placed flat on the test bracket (not marked in the figure, with built-in aging environment simulation components, such as ultraviolet lamp, heating tube, humidity regulator, etc.) inside the chamber 1 to ensure that the protective film is wrinkle-free and unobstructed, so as to facilitate the uniform action of the subsequent aging environment.

[0048] During the sealing and fixing stage, push the door 205 in the opposite direction so that the sealing strip 206 on one side of the door 205 initially fits against the edge of the box body 1. At this time, the rotating block 204 rotates with the door 205, driving the second U-shaped frame 203 to move along the first limiting groove 223 inside the first U-shaped frame 201, ensuring that the sealing strip 206 is initially aligned with the box body 1. Then rotate the movable frame 218 so that the second threaded rod 221 is aligned with the connecting block 215 on the door 205. After inserting the connecting block 215, rotate the rotating cap 222 to drive the second threaded rod 221 to tighten along the inner threaded block 216. At this time, the slide plate 220 slides along the guide groove 219 of the movable frame 218, driving the door 205 to further press the box body 1 until it feels tight by hand (at this time, the contact pressure between the sealing strip 206 and the box body 1 reaches the initial sealing threshold).

[0049] During the detection and anti-loosening stage, the detection parameters are input through the PLC controller 5, and the aging environment simulation system inside the cabinet 1 is started to begin the aging resistance test of the protective film. The PLC controller 5 simultaneously sends an energizing command to the electromagnet 302 of the fixed anti-loosening mechanism 3. The electromagnet 302 generates magnetism and attracts the connecting iron 308 at the corresponding position. The connecting iron 308 drives the support plate 307 to move away from the second U-shaped frame 203. At the same time, the vertical rod 304 connected to the support plate 307 moves along the third U-shaped frame 303. The reset spring 306 outside the vertical rod 304 is compressed, thereby limiting and fixing the second U-shaped frame 203 to prevent the cabinet door 205 from loosening due to equipment vibration or changes in internal air pressure.

[0050] During the dynamic pressure compensation stage, multiple pressure sensors 214 embedded on one side of the housing 1 monitor the contact pressure between the sealing strip 206 and the housing 1 in real time, and continuously transmit the pressure data to the PLC controller 5 in the form of electrical signals. The PLC controller 5 compares the measured pressure with the preset sealing pressure threshold. If the measured pressure is lower than the threshold, the dynamic compensation program is triggered. Before compensation, the PLC controller 5 first controls the electromagnet 302 to be de-energized. The magnetism of the electromagnet 302 disappears, and the compressed reset spring 306 releases its elastic potential energy, pushing the vertical rod 304 to move in the opposite direction along the third U-shaped frame 303, driving the support plate 307 and the connecting iron 308 to reset, releasing the limit on the second U-shaped frame 203. Then, the PLC controller 5 starts the servo motor 211, which drives the first threaded rod 209 to rotate, and the second threaded rod 209 rotates. A threaded rod 209 connects to a movable plate 212 which moves away from the first U-shaped frame 201 along a guide rod 210. The movable plate 212 pulls the compensation plate 207 along the second limiting groove 225 inside the first U-shaped frame 201 via a movable rod 213, causing the tension spring 208 between the compensation plate 207 and the second U-shaped frame 203 to be stretched. The tension of the tension spring 208 increases, and the tension of the tension spring 208 is transmitted to the door 205 through the second U-shaped frame 203 and the rotating block 204, causing the sealing strip 206 to further press the box body 1. The pressure sensor 214 detects the pressure rise. When the pressure returns to the preset threshold range, the PLC controller 5 controls the servo motor 211 to stop and simultaneously controls the electromagnet 302 to be energized again, re-limiting and fixing the second U-shaped frame 203, restoring the anti-loosening constraint.

[0051] After the test is completed and the sample is removed, the PLC controller 5 automatically shuts down the aging environment simulation system inside the chamber 1 after the preset test duration has been reached. Once the temperature and humidity inside the chamber 1 have returned to normal, the electromagnet 302 is de-energized, the reset spring 306 drives the support plate 307 to reset, and the anti-loosening constraint is released. Finally, the rotating cap 222 is rotated to disengage the second threaded rod 221 from the internal threaded block 216 and the connecting block 215. The chamber door 205 is then opened, and the protective film after testing is removed, thus completing the entire testing process.

[0052] The wiring diagrams of the servo motor 211, pressure sensor 214, and PLC controller 5 in this invention are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring layouts of the servo motor 211, pressure sensor 214, and PLC controller 5 will not be explained in detail.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision testing device for the aging resistance of protective films, characterized in that, Includes a housing (1), on one side of the housing (1) is a tension dynamic compensation sealing mechanism (2) and a fixing anti-loosening mechanism (3), on the bottom of the housing (1) is a moving mechanism (4), and on one side of the housing (1) is a PLC controller (5), the wiring terminal of the PLC controller (5) is connected to the internal wiring of the equipment. The tension dynamic compensation sealing mechanism (2) includes two first U-shaped frames (201) and two fixed plates (202) installed on one side of the housing (1). Two second U-shaped frames (203) and two compensation plates (207) are arranged inside the two first U-shaped frames (201). Two rotating blocks (204) are rotatably installed inside the two second U-shaped frames (203). A housing door (205) is fixedly connected to one side of each of the two rotating blocks (204). A sealing strip (206) is installed on one side of each housing door (205). Two tension springs (208) are fixedly connected between the two second U-shaped frames (203) and the two compensation plates (207). The two fixed plates (202) are... A first threaded rod (209) is rotatably connected between the two fixed plates (202), and a guide rod (210) is fixedly connected between the two fixed plates (202). A servo motor (211) for driving the first threaded rod (209) to rotate is fixedly installed on one side of one of the fixed plates (202). A movable plate (212) is threadedly installed on the outer surface of the first threaded rod (209) and the guide rod (210). Two movable rods (213) are fixedly connected to one side of the movable plate (212). One end of the two movable rods (213) movably passes through the two first U-shaped frames (201) and is fixedly connected to the two compensation plates (207). A plurality of pressure sensors (214) are embedded on one side of the housing (1).

2. The high-precision protective film aging resistance testing equipment according to claim 1, characterized in that: A connecting block (215) is fixedly connected to one side of the box door (205), and an internal thread block (216) is fixedly connected to one side of the box body (1). An installation groove (217) is provided on one side of the internal thread block (216), and a movable frame (218) is rotatably installed on the inner side of the installation groove (217).

3. The high-precision protective film aging resistance testing equipment according to claim 2, characterized in that: A guide groove (219) is provided on one side of the movable frame (218). A slide plate (220) is slidably connected in the guide groove (219). A second threaded rod (221) is rotatably installed on one side of the slide plate (220). The second threaded rod (221) is inserted into the connecting block (215), and one end of the second threaded rod (221) is threaded to the inner surface of the inner threaded block (216). A rotating cap (222) is installed on one end of the second threaded rod (221).

4. The high-precision protective film aging resistance testing equipment according to claim 1, characterized in that: Four first limiting grooves (223) are provided on the inner side of the two first U-shaped frames (201), and four first limiting blocks (224) are slidably connected in the four first limiting grooves (223), and the four first limiting blocks (224) are fixedly connected to the two second U-shaped frames (203).

5. The high-precision protective film aging resistance testing equipment according to claim 1, characterized in that: The inner sides of the two first U-shaped frames (201) are provided with four second limiting grooves (225), and four second limiting blocks (226) are slidably connected in the four second limiting grooves (225), and the four second limiting blocks (226) are fixedly connected to the two compensation plates (207).

6. The high-precision protective film aging resistance testing equipment according to claim 1, characterized in that: The fixing and anti-loosening mechanism (3) includes two mounting plates (301) fixedly connected to one side of the box (1), and an electromagnet (302) is installed on the bottom of one of the mounting plates (301) and the top of the other mounting plate (301).

7. The high-precision protective film aging resistance testing equipment according to claim 4, characterized in that: The top of one of the first limiting blocks (224) and the bottom of the other first limiting block (224) are fixedly connected to a third U-shaped frame (303). Four vertical rods (304) are provided on the inner side of the two third U-shaped frames (303), and four limiting discs (305) are fixedly connected to one end of the four vertical rods (304).

8. The high-precision protective film aging resistance testing equipment according to claim 7, characterized in that: Four return springs (306) are fitted on the outer surface of the four vertical rods (304). One end of the four vertical rods (304) passes through two third U-shaped frames (303) and is fixedly connected to two support plates (307). The top of one support plate (307) and the bottom of the other support plate (307) are both fixedly connected to connecting irons (308).

9. The high-precision protective film aging resistance testing equipment according to claim 1, characterized in that: The moving mechanism (4) includes a base (401) installed at the bottom of the box (1). An electric push rod (402) is installed on the inner top of the base (401). A lifting plate (403) is fixedly connected to the telescopic end of the electric push rod (402). Four casters (404) are installed at the bottom of the lifting plate (403), and the four casters (404) move through the base (401).

10. A high-precision protective film aging resistance testing device according to claim 9, characterized in that: The base (401) has two third limiting grooves (405) on its inner side. Two third limiting blocks (406) are slidably connected in the two third limiting grooves (405), and the two third limiting blocks (406) are fixedly connected to the lifting plate (403).

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