Weather resistance detection device for release film

Abstract

The invention relates to the technical field of release film detection, and discloses a release film weatherability detection device, which comprises a detection box, a control panel, a differential scanning calorimeter, a detection module, an alternate compensation module, a detection screening module and a temporary resistance separation module, the alternate compensation module comprises a high-temperature area and a low-temperature area, release film samples are alternately and circularly detected in the high-temperature area and the low-temperature area, detection temperature fluctuation caused by energy brought in from an opposite area in the sample switching process is eliminated, and defective films are screened through the detection screening module before the release films enter the alternate compensation module to be detected. The temporary resistance separation module is used for detecting and screening out defective goods and automatically separating the defective goods; a rotation track is arranged to be matched with high-temperature short-time and cooling mode circulating detection, hot and cold alternate transfer is achieved, a sample is cooled after high-temperature detection is conducted for a certain time, the continuous high-temperature exposure time of a release film base material layer is shortened, and the situation that jelly seeps and adheres to the detection environment is affected is avoided.

Description

Technical Field

[0001] This invention relates to the field of release film testing technology, and more specifically, to a weather resistance testing device for release films. Background Technology

[0002] Release film is a special film used in industrial and manufacturing processes, mainly to prevent adhesion or as a separation layer. It is usually made of polymer materials and has good temperature resistance and chemical stability. The main function of release film is to prevent coatings, adhesives or other materials from sticking to the substrate during curing or processing, thereby facilitating subsequent operations and handling. With the development of technology, higher requirements have been placed on release film products. It is also very important to conduct effective weather resistance accelerated tests on the characteristics of the application environment to determine whether the release film is suitable.

[0003] The core item of release film weather resistance testing is high temperature stability testing. The sample is placed in the testing environment and continuously heated to simulate a long-term high temperature environment. Its high temperature weather resistance is judged based on its appearance integrity. PET release films account for a large proportion of release films. When testing their weather resistance, due to their low temperature resistance, they are easily affected by temperature fluctuations and soften or even melt during high temperature testing. As a result, a gel-like residue appears on the surface and easily sticks to the testing stage, which affects the subsequent testing of release film products.

[0004] If the release film samples are not screened before testing, some defective release films will be mixed into the testing process. The mechanical strength of the substrate layer of the defective film is not up to standard, and the release force will still decrease at high temperature, causing the adhesive layer to seep out. If such a situation is incorporated into the testing process, it will interfere with the overall test data of the release film. Summary of the Invention

[0005] This invention provides a weather resistance testing device for release films, solving the technical problem in related technologies that PET release films are easily softened and melted by temperature fluctuations during high-temperature testing, resulting in sticky gel-like residues that affect the testing results.

[0006] This invention provides a weather resistance testing device for release films, comprising:

[0007] The testing chamber, control panel, differential scanning calorimeter, and testing module form a testing environment for release films;

[0008] The system includes an alternating compensation module, a detection and screening module, and a temporary resistance separation module. The alternating compensation module includes a high-temperature region and a low-temperature region. Release film samples are detected alternately in the high and low temperature regions to eliminate the energy brought in from the opposing region during the sample switching process, which causes fluctuations in the detection temperature. Before the release film enters the alternating compensation module for detection, it is screened by the detection and screening module to remove residual film. The residual film is then automatically separated by the temporary resistance separation module.

[0009] The detection module includes a first stepper motor, a rotating shaft fixedly connected to the drive end of the first stepper motor, a detection platform fixedly connected to the top end of the rotating shaft, pressing parts fixedly connected to both sides of the top of the detection platform, an electric push rod disposed at the bottom of the detection platform, and an opening and closing plate rotatably connected to the middle of the detection platform. The telescopic rod end of the electric push rod is rotatably connected to the opening and closing plate.

[0010] As a further optimization of the present invention, the alternating compensation module includes:

[0011] A high-temperature chamber and a low-temperature chamber are symmetrically arranged on both sides of the inner wall of the testing chamber. A heat storage module and a cold storage module are respectively arranged in the middle of the inner wall of the high-temperature chamber and the cold storage module. The bottom of the heat storage module and the cold storage module are fixedly connected to the uprights. A frame is fixedly connected to the center of the interior of the high-temperature chamber and the low-temperature chamber. A connecting spring is fixedly connected inside the frame on both sides.

[0012] As a further optimization of the present invention, the other end of the connecting springs on both sides is fixedly connected to a pentagonal groove block, and the lower center of the uprights on both sides is rotatably connected to a strip. The strips on both sides are slidably connected to the inner wall of the pentagonal groove blocks on both sides, and the bottom ends of the uprights on both sides pass through the uprights on both sides and are fixedly connected to the pentagonal groove blocks on both sides.

[0013] As a further optimization of the present invention, the detection and screening module includes:

[0014] A connecting plate is fixedly installed on the inner wall of the testing chamber. An infrared sensor is fixedly installed on the bottom side of the connecting plate away from the high-temperature chamber. A second stepper motor is fixedly connected to the center of the bottom of the connecting plate. A hanging plate is fixedly connected to the bottom of the connecting plate. The drive end of the second stepper motor passes through the hanging plate and is fixedly connected to a transmission plate. The transmission plate is rotatably connected to the bottom of the hanging plate.

[0015] As a further optimization of the present invention, arc-shaped grooves are provided on both sides of the transmission disk, and adjusting rods are slidably connected to the inner walls of the arc-shaped grooves on both sides, and isolation covers are fixedly connected to the top ends of the adjusting rods on both sides.

[0016] As a further optimization of the present invention, cavities are provided in the middle of both sides of the hanging plate, and the outer walls of the isolation covers on both sides are slidably connected to the inner walls of the cavities on both sides. A pair of spring hanging rods are fixedly connected to the bottom of the isolation covers on both sides, and a bracket is slidably connected to the outer wall of each pair of spring hanging rods. A sponge is rotatably connected to the bottom of each bracket on both sides.

[0017] As a further optimization of the present invention, a dual-axis electric telescopic rod is fixedly connected to the middle of the inner side of the two sides of the hanging bracket, and a scraper ring is fixedly connected to both ends of the dual-axis electric telescopic rod. The inner walls of the scraper rings on both sides are slidably connected to the outer walls of the two sponge wipers. An optical detection module is fixedly installed at the bottom center of the hanging plate.

[0018] As a further optimization of the present invention, the temporary resistance separation module includes:

[0019] A sector-shaped base is fixedly connected to the inner wall of the detection box. A third stepper motor is fixedly connected to the bottom of the sector-shaped base. A baffle is fixedly connected to the drive end of the third stepper motor. A limit ball is fixedly connected to the bottom of the baffle. A guide rail is fixedly connected to the top of the sector-shaped base. The outer wall of the limit ball is slidably connected to the inner wall of the guide rail.

[0020] As a further optimization of the present invention, a spring ball is fixedly connected to the bottom of the detection platform near the side of the sector seat, the spring ball and the center of the baffle are on the same straight line, and a frame is provided on the inner wall of the detection box directly below the sector seat.

[0021] As a further optimization of the present invention, a miniature fan is fixedly connected to the middle of the side of the testing platform near the high temperature chamber, an air inlet pipe is fixedly connected to the bottom of the miniature fan, air delivery pipes are fixedly connected to the middle of both sides of the miniature fan, and an air outlet pipe is fixedly connected to the opposite side of the two pressing parts, with the far ends of the two air delivery pipes respectively penetrating and fixed inside the two air outlet pipes.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. The weather resistance testing device for release film described in this invention sets a rotational testing trajectory for the release film sample and sets a high-temperature short-time + cooling mode for cyclic testing along the rotation path to achieve the alternating transfer of heat and cold energy. After a certain period of high-temperature testing, the sample is cooled down before entering the next testing cycle. This reduces the continuous high-temperature exposure time of the PET release film substrate layer to avoid softening and melting, and prevents the seepage and adhesion of gel-like substances in the testing environment. At the same time, it can also achieve low-temperature weather resistance testing of the release film sample to understand the delamination and embrittlement of the sample.

[0024] 2. The weather resistance testing device for release film described in this invention sets up a transfer switching synchronous trigger energy compensation during the high temperature stability testing process of the release film. This compensates and neutralizes the energy carried from the opposite testing area during the transfer of the release film during testing, reduces the temperature change amplitude inside the testing area, and ensures the accuracy of the test data of the release film in the high temperature testing area and the low temperature testing area.

[0025] 3. The weather resistance testing device for release films described in this invention dynamically screens the release film during the initial testing process, and uses a closed structure with adjustable opening and closing to test the light transmittance of the sample. After testing, the device can wipe and clean the release film sample during reset, removing dust or other residues from the test surface of the release film, thus avoiding interference from carbonization of contaminants in high-temperature environments during subsequent testing. Release film samples that pass the optical testing module can then be rotated by the testing platform to enter the next testing process.

[0026] 4. The weather resistance testing device for release film described in this invention sets up a temporary blocking mechanism to block release film samples that fail the test, and simultaneously triggers a blowing mechanism to assist in blowing the release film samples on the test stage into the frame. Airflow blowing replaces mechanical contact transfer, reducing the risk of film surface damage. The temporary blocking mechanism processes unqualified samples in real time to prevent them from flowing into subsequent processes, ensuring that quality problems are isolated in a timely manner. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the outer shell structure of a weather resistance testing device for release films proposed in this invention.

[0028] Figure 2 This is a top view of the internal structure of the testing chamber of a weather resistance testing device for release films proposed in this invention.

[0029] Figure 3 This is a schematic diagram of the internal structure of the testing chamber of a weather resistance testing device for release films proposed in this invention.

[0030] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0031] Figure 5 This is a partial structural schematic diagram of the alternating compensation module of a weather resistance testing device for release films proposed in this invention.

[0032] Figure 6 This is a schematic diagram of the vertical cross-section of the high-temperature chamber and the low-temperature chamber in a weather resistance testing device for release films proposed in this invention.

[0033] Figure 7 for Figure 6 Enlarged diagram of point B in the middle.

[0034] Figure 8 This is a vertical half-section diagram of the testing chamber of a weather resistance testing device for release films proposed in this invention.

[0035] Figure 9 This is a partial structural schematic diagram of a temporary resistance separation module of a weather resistance testing device for release films proposed in this invention.

[0036] Figure 10 This is a schematic diagram of the initial detection state structure in a weather resistance testing device for release films proposed in this invention.

[0037] Figure 11 This is a schematic diagram of the detection and screening module of a weather resistance testing device for release films proposed in this invention.

[0038] Figure 12 for Figure 11 Enlarged diagram of point C in the middle.

[0039] Figure 13 This is a side view of the internal structure of the testing chamber of a weather resistance testing device for release films proposed in this invention.

[0040] In the picture:

[0041] 1. Detection box; 2. Control panel; 3. Differential scanning calorimeter.

[0042] Detection module 4 includes:

[0043] 401. First stepper motor; 402. Rotating shaft; 403. Testing table; 404. Pressing part; 405. Electric push rod; 406. Opening and closing plate.

[0044] Alternating compensation module 5 includes:

[0045] 501. High-temperature chamber; 502. Heat storage module; 503. Low-temperature chamber; 504. Cold storage module; 505. Vertical frame; 506. Connecting spring; 507. Slats; 508. Pentagonal groove block; 509. Vertical pole.

[0046] The detection and screening module 6 includes:

[0047] 601. Connecting plate; 602. Infrared sensor; 603. Second stepper motor; 604. Hanging plate; 605. Transmission plate; 606. Arc groove; 607. Adjusting rod; 608. Isolation cover; 609. Cavity; 610. Spring hanging rod; 611. Hanger; 612. Sponge wiper; 613. Dual-axis electric telescopic rod; 614. Scraper ring; 615. Optical detection module.

[0048] Temporary resistance separation module 7 includes:

[0049] 701. Sector-shaped base; 702. Third stepper motor; 703. Baffle; 704. Limit ball; 705. Guide rail; 706. Spring ball; 707. Frame; 708. Miniature fan; 709. Air inlet pipe; 710. Air delivery pipe; 711. Air outlet pipe. Detailed Implementation

[0050] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0051] Example 1

[0052] like Figures 1 to 13 As shown, an embodiment of the present invention provides a weather resistance testing device for release films, comprising:

[0053] The test chamber 1, control panel 2, differential scanning calorimeter 3, and test module 4 form a test environment for release films;

[0054] The system includes an alternating compensation module 5, a detection and sieving module 6, and a temporary resistance separation module 7. The alternating compensation module 5 includes a high-temperature region and a low-temperature region. The release film sample is detected alternately in the high and low temperature regions to eliminate the energy brought in from the opposite region during the sample switching process, which causes the detection temperature to fluctuate. Before the release film enters the alternating compensation module 5 for detection, it is sieved by the detection and sieving module 6 and then automatically separated by the temporary resistance separation module 7.

[0055] The detection module 4 includes a first stepper motor 401, a rotating shaft 402 fixedly connected to the drive end of the first stepper motor 401, a detection platform 403 fixedly connected to the top of the rotating shaft 402, pressing parts 404 fixedly connected to both sides of the top of the detection platform 403, an electric push rod 405 disposed at the bottom of the detection platform 403, and an opening and closing plate 406 rotatably connected to the middle of the detection platform 403. The telescopic rod end of the electric push rod 405 is rotatably connected to the opening and closing plate 406.

[0056] It should be noted that the release film sample to be tested is placed on the testing stage 403 and initially processed by the pressing parts 404 on both sides. The testing stage 403 is rotated at a certain angle by the first stepper motor 401 and the rotating shaft 402 to complete the rotational transfer test of the release film sample. This allows the release film sample to be tested cyclically along the rotational trajectory with the high-temperature test zone and the low-temperature test zone, realizing the alternating transfer of heat and cold energy. After a certain period of high-temperature testing, the sample is cooled down before entering the next testing cycle. This reduces the continuous high-temperature exposure time of the PET release film substrate layer to avoid softening and melting, and to prevent the seepage of adhesive substances that cause sticking. The electric push rod 405 and the opening and closing plate 406 can cooperate with the temporary resistance separation module 7 to subsequently separate and process defective samples.

[0057] Alternating compensation module 5 includes:

[0058] High-temperature chamber 501 and low-temperature chamber 503 are symmetrically arranged on both sides of the inner wall of the testing chamber 1. A heat storage module 502 and a cold storage module 504 are respectively arranged in the middle of the inner wall of the high-temperature chamber 501 and the low-temperature chamber 503. The bottom of the heat storage module 502 and the cold storage module 504 are fixedly connected to the uprights 509. The center of the interior of the high-temperature chamber 501 and the low-temperature chamber 503 are fixedly connected to the uprights 505 on both sides. The interior of the uprights 505 on both sides is fixedly connected to the connecting springs 506 on both sides. The other end of the connecting springs 506 on both sides is fixedly connected to the pentagonal groove block 508. The lower middle part of the uprights 505 on both sides is rotatably connected to the plate 507 on both sides. The plate 507 on both sides is slidably connected to the inner wall of the pentagonal groove block 508 on both sides. The bottom end of the uprights 509 on both sides passes through the uprights 505 on both sides and is fixedly connected to the pentagonal groove block 508 on both sides.

[0059] It should be noted that during the rotation process, the release film sample on the testing platform 403 first passes through the high-temperature chamber 501 for high-temperature testing. The rotation duration is controlled by the control panel 2 according to the speed of the first stepper motor 401, so that the testing platform 403 temporarily stops inside the high-temperature chamber 501 for testing after a certain time. After the testing time is reached, the first stepper motor 401 controls the rotation output to the outside of the high-temperature chamber 501, and the high-temperature weather resistance of the release film is tested by the differential scanning calorimeter 3. Then, it continues to rotate to the low-temperature chamber 503 for short-term cooling before entering the next testing cycle. This reduces the continuous high-temperature exposure time of the PET release film substrate layer and avoids softening and melting, which would cause the gel to seep out and affect the testing environment. Temperature barrier curtains are set in the middle of the high-temperature chamber 501 and the low-temperature chamber 503. In the default state, they are in a hanging state to block the influence of external temperature. After contacting and passing through the testing platform 403, they can also return to their original state to reduce the influence of temperature fluctuations.

[0060] During the rotation and testing of the release film sample by the testing stage 403, the spring ball 706 at its bottom can abut against the heat storage module 502 inside the high-temperature chamber 501. The heat storage module 502 is subjected to a downward force, which pushes it against the bottom upright 509. The upright 509 presses down on the pentagonal groove block 508, causing the connecting spring 506 to deform. After being subjected to the force, the pentagonal groove block 508 causes the strip 507 to move along its inner wall and push the pentagonal groove block 508 upward, thus causing the heat storage module 502 above to pop out to the middle of the high-temperature chamber 501. The heat is then evenly distributed to the high-temperature testing environment through the heat sinks. Similarly, the same steps are taken when passing through the low-temperature chamber 503, thus achieving high temperature detection. The high-temperature short-time + cooling cyclic detection mode achieves the alternating transfer of heat and cold energy. After a certain period of high-temperature detection, the sample is cooled before entering the next detection cycle. This reduces the continuous high-temperature exposure time of the PET release film substrate layer, preventing softening and melting. In addition, the rotational detection path provides temperature compensation to the detection areas on both sides through elastic extrusion, reducing the temperature influence carried by the detection module from the opposite detection area to the local detection area. This neutralizes the relative temperature and reduces the impact on the detection data fluctuations. The high-temperature short-time + cooling cyclic detection mode helps to ensure a constant temperature during the detection of release film samples, avoiding the leakage of heat-induced gel-like substances from the sample substrate layer and the resulting contamination of the detection environment caused by continuous high-temperature detection.

[0061] Example 2

[0062] In accordance with Embodiment 1, a pre-test screening is set for the substrate layer strength of the release film sample to prevent residual film with weakened release force from oozing out as a gel during high-temperature testing, thus interfering with the overall test data. The testing and screening module 6 includes:

[0063] A connecting plate 601 is fixedly installed on the inner wall of the detection box 1. An infrared sensor 602 is fixedly installed on the bottom side of the connecting plate 601 away from the high-temperature chamber 501. A second stepper motor 603 is fixedly connected to the center of the bottom of the connecting plate 601. A hanging plate 604 is fixedly connected to the bottom of the connecting plate 601. The drive end of the second stepper motor 603 passes through the hanging plate 604 and is fixedly connected to a transmission plate 605. The transmission plate 605 is rotatably connected to the bottom of the hanging plate 604. Arc-shaped grooves 606 are opened on both sides of the transmission plate 605. Adjusting rods 607 are slidably connected to the inner walls of the arc-shaped grooves 606 on both sides. Isolation covers 608 are fixedly connected to the top of the adjusting rods 607 on both sides. The hanging plate 604 is fixedly connected to the bottom of the high-temperature chamber 501. A cavity 609 is provided in the middle of both sides of the 4. The outer walls of the isolation covers 608 on both sides are slidably connected to the inner walls of the cavities 609 on both sides. A pair of spring hanging rods 610 are fixedly connected to the bottom of the isolation covers 608 on both sides. A bracket 611 is slidably connected to the outer wall of each pair of spring hanging rods 610. A sponge wiper 612 is rotatably connected to the bottom of each bracket 611 on both sides. A dual-axis electric telescopic rod 613 is fixedly connected to the middle of the inner side of each bracket 611 on both sides. A scraper ring 614 is fixedly connected to both ends of each dual-axis electric telescopic rod 613 on both sides. The inner walls of the scraper rings 614 on both sides are slidably connected to the outer walls of the sponge wipers 612 on both sides. An optical detection module 615 is fixedly installed at the bottom center of the hanging plate 604.

[0064] It should be noted that during the rotation of the detection stage 403 towards the connecting plate 601, when it is directly below the infrared sensor 602 and interrupts the infrared light, the signal from the infrared sensor 602 controls the control panel 2 to control the second stepper motor 603 to drive the transmission disk 605 to rotate. This causes the two adjusting rods 607 to move relative to each other along the inner walls of the two arc-shaped grooves 606, and drives the two isolation covers 608 to move closer to each other along the two cavities 609, forming a sealed light detection environment for the sample detection area directly below, avoiding interference from external light. Correspondingly, after the detection is completed, the second stepper motor 603 can operate in reverse. The release film spreads and moves to both sides, accompanied by the opening and closing of the two isolation covers 608. At the same time, the two sponge wipers 612 can wipe the test surface of the release film sample to clean the residual dirt and avoid the interference of pollutant carbonization in the high temperature environment during subsequent testing. The release film sample that passes the quality test by the optical detection module 615 can enter the high temperature detection area for subsequent testing. The setting of the spring hanger 610 and the bracket 611 can provide a wider contact space for the sponge wiper 612 and firmly attach it to the test surface of the release film sample.

[0065] Example 3

[0066] Corresponding to the temporary positioning barrier set for the pre-detection of the release film sample in the above embodiments, the temporary blocking separation module 7 includes:

[0067] A sector-shaped base 701 is fixedly connected to the inner wall of the detection box 1. A third stepper motor 702 is fixedly connected to the bottom of the sector-shaped base 701. A baffle 703 is fixedly connected to the drive end of the third stepper motor 702. A limit ball 704 is fixedly connected to the bottom of the baffle 703. A guide rail 705 is fixedly connected to the top of the sector-shaped base 701. The outer wall of the limit ball 704 is slidably connected to the inner wall of the guide rail 705. A spring ball 706 is fixedly connected to the bottom of the detection table 403 near the side of the sector-shaped base 701. The spring ball 706 is connected to the baffle. The centers of 703 are located on the same straight line. The inner wall of the test box 1 is provided with a frame 707 located directly below the sector seat 701. A miniature fan 708 is fixedly connected to the middle of the side of the test table 403 near the high temperature chamber 501. An air inlet pipe 709 is fixedly connected to the bottom of the miniature fan 708. Air supply pipes 710 are fixedly connected to the middle of both sides of the miniature fan 708. An air outlet pipe 711 is fixedly connected to the opposite side of the two side pressing parts 404. The far ends of the two side air supply pipes 710 pass through and are fixed inside the two side air outlet pipes 711 respectively.

[0068] It should be noted that in the second embodiment described above, when the detection stage 403 rotates and moves to interrupt the infrared light, the third stepper motor 702 operates under signal control, driving the baffle 703 to rotate and move along the guide rail 705 via the limit ball 704, completing the 90-degree adjustment of the baffle 703 from horizontal to vertical, attaching it to the outer wall of the spring ball 706, and temporarily blocking the rotation of the detection stage 403. This allows the release film sample to complete the pre-quality inspection during this process. If the quality is qualified, the control panel 2 can control the third stepper motor 702 to reverse its operation via electrical signal, restoring the baffle 703 to its original horizontal position. After the detection stage 403 is no longer blocked by the limit ball, it can proceed to the next step. Testing is conducted in the high-temperature testing area. If the quality is unqualified, the baffle 703 remains vertical, blocking the testing platform 403. Simultaneously, the electric push rod 405 operates to flip the opening and closing plate 406 downwards. In conjunction with the micro fan 708, air is drawn from the air inlet pipe 709 and delivered through the air supply pipes 710 on both sides to the air outlet pipes 711 on both sides. Finally, the air is blown downwards from the nozzles on both sides, directly onto the outer wall of the defective membrane. This allows the defective membrane to fall downwards through the rectangular hole in the middle of the testing platform 403 into the interior of the frame 707, completing the separation of the defective sample and preventing it from flowing into subsequent processes. This ensures that quality problems are isolated in a timely manner and prevents interference with the overall testing data.

[0069] Working principle:

[0070] First, the release film sample to be tested is placed on the testing stage 403 and initially processed by the pressing parts 404 on both sides. Then, the testing stage 403 is rotated at a certain angle by the first stepper motor 401 and the rotating shaft 402 to complete the rotational transfer test of the release film sample. This allows the release film sample to be tested in a cycle along the rotational trajectory with the high temperature test zone and the low temperature test zone, realizing the alternating transfer of heat energy and cold energy. After a certain period of high temperature test, the sample is cooled down before entering the next test cycle. This reduces the continuous high temperature exposure time of the PET release film substrate layer to avoid softening and melting, and to prevent the seepage of gel-like substances that cause sticking.

[0071] As the detection stage 403 rotates and approaches the connecting plate 601, when it is directly below the infrared sensor 602 and interrupts the infrared light, the signal from the infrared sensor 602 controls the control panel 2 to control the second stepper motor 603 to drive the transmission disk 605 to rotate. This causes the two adjusting rods 607 to move relative to each other along the inner walls of the two arc-shaped grooves 606, and drives the two isolation covers 608 to move closer to each other along the two cavities 609, forming a sealed light detection environment for the sample detection area directly below, avoiding interference from external light. Correspondingly, after the detection is completed, the second stepper motor 603 can reverse its operation to move to both sides. The diffusion movement, accompanied by the opening and closing of the isolation covers 608 on both sides, allows the sponge wipes 612 on both sides to wipe the test surface of the release film sample, cleaning away residual dirt and avoiding interference from pollutant carbonization in the high-temperature environment during subsequent testing. Release film samples that pass the quality inspection by the optical inspection module 615 can enter the high-temperature testing area for subsequent testing, avoiding interference from pollutant carbonization in the high-temperature environment during subsequent testing. The setting of the spring hanger 610 and the bracket 611 can provide the sponge wiper 612 with a wider contact space and firmly attach it to the test surface of the release film sample.

[0072] Simultaneously, when the infrared light is interrupted by the rotation of the detection platform 403, the third stepper motor 702 operates under the signal control of the infrared sensor 602, driving the baffle 703 to rotate and move along the guide rail 705 via the limit ball 704, completing the 90-degree adjustment of the baffle 703 from horizontal to vertical. The baffle 703 then attaches to the outer wall of the spring ball 706, temporarily blocking the rotation of the detection platform 403. This allows the release film sample to undergo preliminary quality inspection. If the quality is qualified, the control panel 2 can control the third stepper motor 702 to reverse its operation via electrical signals, restoring the baffle 703 to its original horizontal position. Once the detection platform 403 is no longer blocked by the limit ball, it can proceed to the next step. If the quality fails to meet the requirements during testing in the high-temperature testing area, the baffle 703 will remain vertical and block the testing platform 403. At the same time, the electric push rod 405 will rotate the opening and closing plate 406 downwards and adjust it. In conjunction with the micro fan 708, air will be drawn from the air inlet pipe 709 and delivered to the air outlet pipes 711 on both sides through the air supply pipes 710 on both sides. Finally, the air will be blown downwards from the nozzles on both sides, directly onto the outer wall of the defective membrane. This will allow the defective membrane to fall into the frame 707 through the rectangular hole in the middle of the testing platform 403, thus completing the separation of the defective sample and preventing it from flowing into subsequent processes. This ensures that quality problems are isolated in time and prevents interference with the overall testing data.

[0073] After the pre-inspection is completed, the release film sample on the testing platform 403 first passes through the high-temperature chamber 501 for high-temperature testing in the rotating testing trajectory. The rotation time is controlled by the control panel 2 according to the speed of the first stepper motor 401, so that the testing platform 403 temporarily stops inside the high-temperature chamber 501 for testing after the corresponding time. After the testing time is reached, the first stepper motor 401 controls the rotation output to the outside of the high-temperature chamber 501, and the high-temperature weather resistance of the release film is tested by the differential scanning calorimeter 3. Then, it continues to rotate to the low-temperature chamber 503 for short-term cooling before entering the next testing cycle. This reduces the continuous high-temperature exposure time of the PET release film substrate layer and avoids softening and melting, which would cause the gel to seep out and affect the testing environment. Temperature barrier curtains are set in the middle of the high-temperature chamber 501 and the low-temperature chamber 503. In the default state, they are in a hanging state to block the influence of external temperature. After contacting and passing through the testing platform 403, they can also return to their original state to reduce the influence of temperature fluctuations.

[0074] During the rotation and testing of the release film sample by the testing stage 403, the spring ball 706 at its bottom can abut against the heat storage module 502 inside the high-temperature chamber 501. The heat storage module 502 is subjected to a downward force, which pushes it against the bottom upright 509. The upright 509 presses down on the pentagonal groove block 508, causing the connecting spring 506 to deform. After being subjected to the force, the pentagonal groove block 508 causes the strip 507 to move along its inner wall and push the pentagonal groove block 508 upward, thus causing the heat storage module 502 above to pop out to the middle of the high-temperature chamber 501. The heat is then evenly distributed to the high-temperature testing environment through the heat sinks. Similarly, the same steps are taken when passing through the low-temperature chamber 503, thus achieving high temperature detection. The high-temperature short-time + cooling cyclic detection mode achieves the alternating transfer of heat and cold energy. After a certain period of high-temperature detection, the sample is cooled before entering the next detection cycle. This reduces the continuous high-temperature exposure time of the PET release film substrate layer, preventing softening and melting. In addition, the rotational detection path uses elastic extrusion to provide temperature compensation inside the detection areas on both sides, reducing the temperature influence carried by the detection module from the opposite detection area to this detection area. This neutralizes the relative temperature and reduces the impact on the detection data fluctuations. The high-temperature short-time + cooling cyclic detection mode can ensure a constant temperature during the detection of release film samples, avoiding the leakage of heat-induced gel-like substances from the sample substrate layer and the resulting contamination of the detection environment caused by continuous high-temperature detection.

[0075] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A weather resistance testing device for release films, characterized in that, include: The test box (1), control panel (2), differential scanning calorimeter (3) and test module (4) form a test environment for release film; The alternating compensation module (5), the detection and screening module (6), and the temporary resistance separation module (7) are included. The alternating compensation module (5) includes a high temperature region and a low temperature region. The release film sample is detected alternately in the high and low temperature regions to eliminate the energy brought in from the opposite region during the sample switching process, which causes the detection temperature fluctuation. Before the release film enters the alternating compensation module (5) for detection, it is screened by the detection and screening module (6) for residual film, and then automatically separated by the temporary resistance separation module (7). The detection module (4) includes a first stepper motor (401), the drive end of the first stepper motor (401) is fixedly connected to a rotating shaft (402), the top end of the rotating shaft (402) is fixedly connected to a detection platform (403), both sides of the top of the detection platform (403) are fixedly connected to pressing parts (404), the bottom of the detection platform (403) is provided with an electric push rod (405), the middle part of the detection platform (403) is rotatably connected to an opening and closing plate (406), and the telescopic rod end of the electric push rod (405) is rotatably connected to the opening and closing plate (406).

2. The weather resistance testing device for release films according to claim 1, characterized in that: The alternating compensation module (5) includes: A high-temperature chamber (501) and a low-temperature chamber (503) are respectively symmetrically arranged on both sides of the inner wall of the test chamber (1). A heat storage module (502) and a cold storage module (504) are respectively arranged in the middle of the inner wall of the high-temperature chamber (501) and the low-temperature chamber (503). A pole (509) is fixedly connected to the bottom of the heat storage module (502) and the cold storage module (504). A frame (505) is fixedly connected to the center of the interior of the high-temperature chamber (501) and the low-temperature chamber (503). A connecting spring (506) is fixedly connected inside the frame (505) on both sides.

3. The weather resistance testing device for release films according to claim 2, characterized in that: The other end of each of the connecting springs (506) on both sides is fixedly connected to a pentagonal groove block (508). The lower center of each of the two vertical frames (505) is rotatably connected to a strip (507). The strips (507) on both sides are slidably connected to the inner wall of the pentagonal groove blocks (508) on both sides. The bottom ends of the uprights (509) on both sides pass through the two vertical frames (505) and are fixedly connected to the pentagonal groove blocks (508) on both sides.

4. The weather resistance testing device for release films according to claim 1, characterized in that: The detection and screening module (6) includes: A connecting plate (601) is fixedly installed on the inner wall of the detection box (1). An infrared sensor (602) is fixedly installed on the bottom side of the connecting plate (601) away from the high temperature box (501). A second stepper motor (603) is fixedly connected to the center of the bottom of the connecting plate (601). A hanging plate (604) is fixedly connected to the bottom of the connecting plate (601). The drive end of the second stepper motor (603) passes through the hanging plate (604) and is fixedly connected to a transmission disc (605). The transmission disc (605) is rotatably connected to the bottom of the hanging plate (604).

5. The weather resistance testing device for release films according to claim 4, characterized in that: Both sides of the transmission disc (605) are provided with arc-shaped grooves (606), and the inner walls of the arc-shaped grooves (606) on both sides are slidably connected with adjusting rods (607), and the top ends of the adjusting rods (607) on both sides are fixedly connected with isolation covers (608).

6. The weather resistance testing device for release films according to claim 5, characterized in that: The hanging plate (604) has cavities (609) in the middle of both sides. The outer walls of the isolation covers (608) on both sides are slidably connected to the inner walls of the cavities (609) on both sides. A pair of spring hanging rods (610) are fixedly connected to the bottom of the isolation covers (608) on both sides. A bracket (611) is slidably connected to the outer wall of each pair of spring hanging rods (610). A sponge wiper (612) is rotatably connected to the bottom of each bracket (611) on both sides.

7. A weather resistance testing device for release films according to claim 6, characterized in that: A dual-axis electric telescopic rod (613) is fixedly connected to the middle of the inner side of the hanging bracket (611) on both sides. A scraper ring (614) is fixedly connected to both ends of the dual-axis electric telescopic rod (613) on both sides. The inner walls of the scraper ring (614) on both sides are slidably connected to the outer walls of the sponge wipers (612) on both sides. An optical detection module (615) is fixedly installed at the bottom center of the hanging plate (604).

8. The weather resistance testing device for release films according to claim 1, characterized in that: The temporary resistance separation module (7) includes: A sector-shaped base (701) is fixedly connected to the inner wall of the detection box (1). A third stepper motor (702) is fixedly connected to the bottom of the sector-shaped base (701). A baffle (703) is fixedly connected to the drive end of the third stepper motor (702). A limit ball (704) is fixedly connected to the bottom of the baffle (703). A guide rail (705) is fixedly connected to the top of the sector-shaped base (701). The outer wall of the limit ball (704) is slidably connected to the inner wall of the guide rail (705).

9. A weather resistance testing device for release films according to claim 8, characterized in that: A spring ball (706) is fixedly connected to the bottom of the testing platform (403) near the side of the sector seat (701). The center of the spring ball (706) and the baffle (703) are on the same straight line. A frame (707) is provided on the inner wall of the testing box (1) directly below the sector seat (701).

10. A weather resistance testing device for release films according to claim 9, characterized in that: A miniature fan (708) is fixedly connected to the middle of one side of the testing platform (403) near the high-temperature chamber (501). An air inlet pipe (709) is fixedly connected to the bottom of the miniature fan (708). Air supply pipes (710) are fixedly connected to the middle of both sides of the miniature fan (708). An air outlet pipe (711) is fixedly connected to one side of the opposite face of the two pressing parts (404). The far ends of the two air supply pipes (710) are respectively fixed inside the two air outlet pipes (711).

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