Aluminum-plastic composite film stretching test device and method

Abstract

The invention discloses an aluminum-plastic composite film stretching test device and method, and belongs to the technical field of film strength test stretching mechanisms. According to the scheme, by arranging a clamping plate, after an electric chest expander is powered on, a magnetic block drives the clamping plate to clamp a thin film through a mounting plate and a vertical rod, the electric chest expander slowly pulls a second fixing roller to move in the direction away from a first fixing roller, and the thin film can be stretched in the moving process of the second fixing roller; the two ends of the film are wound on the first fixing roller and the second fixing roller respectively, so that the two ends of the film are wound on the first fixing roller and the second fixing roller respectively, and in the stretching process of the film, the two ends of the film are wound on the first fixing roller and the second fixing roller respectively. The thin film is subjected to tangential uniform tension of the first fixing roller and the second fixing roller, so that the influence on the testing efficiency caused by concentrated stress fracture of a thin film clamping point is effectively avoided, and the effect of improving the testing efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of film strength testing stretching mechanisms, and more particularly to an aluminum-plastic composite film stretching testing device and method. Background Art

[0002] Tensile testing of aluminum-plastic composite films is a key means of evaluating their mechanical properties (such as tensile strength, elongation at break, elastic modulus, etc.), and is crucial to product quality control, process optimization, and application reliability.

[0003] The earliest mechanical property tests of composite films were conducted manually. Testers used simple tools such as scissors and dynamometers to perform tensile and shear tests. Although simple and crude, they could still provide some basic test data. With the increasing requirements for the performance of composite films, traditional testing equipment began to be used for mechanical property tests of composite films. Existing devices for mechanical property tests of composite films include tensile testing machines, which are machines that clamp and stretch the composite film to obtain the results. Such machines can only test one composite film and cannot test multiple composite films at the same time. If multiple composite films are to be tested, the test efficiency will be seriously affected.

[0004] In response to the above problems, some solutions have been provided in the prior art. For example, the Chinese invention application with publication number CN117629729A discloses a mechanical property testing device for composite films. The device is convenient for tensile testing of multiple composite films by setting up multiple detection devices, which greatly reduces the test time and improves the accuracy of the test data of the composite films. However, the prior art mostly fixes the film by horizontal clamping, but horizontal clamping may cause uneven force. If the force point is too small, it is easy to cause the film to rupture at the force point, which requires time to replace the film and retest, seriously affecting the test efficiency. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an aluminum-plastic composite film tensile testing device and method, which can improve the testing efficiency.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] The aluminum-plastic composite film tensile testing device comprises a workbench on which a fixing assembly for fixing the film is fixedly mounted;

[0008] The fixing assembly includes a mounting bracket fixedly mounted on the top wall of the workbench, a horizontal rod fixedly mounted on the mounting bracket, a first fixed roller evenly fixedly mounted on the horizontal rod, a support rod fixedly mounted on the top wall of the workbench, a slide rail fixedly mounted on the top wall of the support rod, a slider mounted with a horizontal sliding installation in the slide rail, and a second fixed roller fixedly mounted on the slider, a mounting frame fixedly mounted on the second fixed roller, a vertical cylinder fixedly mounted on the top walls of the workbench and the mounting frame, a mounting plate vertically slidingly mounted in the vertical cylinder, a vertical rod fixedly mounted on the top wall of the mounting plate, a clamping plate fixedly mounted on the top end of the vertical rod, and a driving assembly cooperating with the mounting plate is provided on the workbench.

[0009] Furthermore, the drive assembly includes a vertical plate vertically fixedly mounted on the top wall of the workbench, an electric puller is fixedly mounted above the side wall of the vertical plate, a connecting frame is fixedly mounted on the second fixed roller, and the output end of the electric puller is fixedly connected to the connecting frame, a first spring is commonly installed between the slider and the slide rail, an electromagnet electrically connected to the electric puller is embedded in the vertical cylinder, a magnetic block cooperating with the magnetic block is embedded on the mounting plate, and a second spring is fixedly mounted on the top wall of the mounting plate.

[0010] Furthermore, the first fixed roller and the second fixed roller are both provided with a limiting groove, and a pressure block is horizontally slidably installed in the limiting groove, and a limiting spring is installed between the pressure block and the first fixed roller.

[0011] Furthermore, an empty slot is provided on the clamping plate, connecting slots are evenly provided on the empty slot, a first air pipe is inserted into the mounting plate, and a linkage component is provided on the vertical rod, and the first air pipe is connected to the empty slot through the linkage component.

[0012] Furthermore, the linkage assembly includes a slide groove provided on the vertical rod, a linkage rod extending into the empty slot is slidably installed in the slide groove, a third spring is installed between the bottom wall of the linkage rod and the slide groove, a connecting hole is provided on the vertical rod, and the first air pipe is connected to the empty slot through the connecting hole, and an exhaust valve connected to the output end and the empty slot is inserted into the empty slot.

[0013] Furthermore, a horizontal plate is provided on the top wall of the workbench, and limit plates are evenly installed on the top wall of the horizontal plate.

[0014] Furthermore, a pneumatic telescopic rod is fixedly installed on the workbench, and a second air pipe connected to the vertical cylinder is inserted into the input end of the pneumatic telescopic rod.

[0015] The present invention also provides a testing method applicable to the above-mentioned aluminum-plastic composite film tensile testing device, comprising the following steps:

[0016] S1. When in use, the two ends of the film are wound around the first fixed roller and the second fixed roller respectively. Then, when the electric tensioner is started, the electromagnet is energized and generates a magnetic field. Then, under the action of the electromagnetic field, the magnetic block drives the clamping plate through the mounting plate and the vertical rod to clamp the film.

[0017] S2. Then the electric tensioner slowly pulls the second fixed roller to move away from the first fixed roller, and during the movement of the second fixed roller, the slider is driven to slide along the slide rail and stretch the first spring. During the movement of the second fixed roller, the film can be stretched, and multiple groups of tests can be performed at the same time, so that different batches of films can be tested at the same time, which is convenient for users to compare the stretching effects of different batches of films. Since the two ends of the film are respectively wrapped around the first fixed roller and the second fixed roller, that is, during the stretching process of the film, the film is subjected to uniform tangential tension from the first fixed roller and the second fixed roller;

[0018] S3. As the mounting plate moves upward, the pressure in the space below the mounting plate in the vertical cylinder decreases. When the clamping plate clamps the film, air is drawn from the empty slot in the vertical cylinder through the first air pipe and the linkage assembly, reducing the pressure in the empty slot. At this point, the film fits into the connecting slot on the empty slot, and the clamping plate and the film are tightly attracted together under the action of pressure.

[0019] S4. When the user fixes the film on the first fixed roller and the second fixed roller respectively, the limit plate can limit the side wall of the film, thereby ensuring that the film on the first fixed roller and the second fixed roller is in a straight line, and when the mounting plate moves upward, the air flow above the mounting plate in the vertical cylinder is squeezed and flows into the pneumatic telescopic rod through the second air pipe, and then the output end of the pneumatic telescopic rod contracts and drives the horizontal plate to move downward, and in the process of the horizontal plate moving downward, it drives the limit plate to move downward, and then gradually loses contact with the film in the process of the limit plate moving downward.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) This solution sets a clamping plate. After the electric tensile device is powered on, the magnetic block drives the clamping plate to clamp the film through the mounting plate and the vertical rod, and the electric tensile device slowly pulls the second fixed roller to move away from the first fixed roller. During the movement of the second fixed roller, the film can be stretched, and multiple groups of tests can be performed at the same time, so that different batches of films can be tested at the same time, which is convenient for users to compare the stretching effects of different batches of films. Since the two ends of the film are respectively wrapped around the first fixed roller and the second fixed roller, that is, during the stretching process of the film, the film is subjected to uniform tangential tension from the first fixed roller and the second fixed roller, which effectively avoids the film clamping point from being broken due to concentrated force and affects the test efficiency, thereby improving the test efficiency;

[0022] (2) This solution sets an empty slot. When the mounting plate moves upward, the pressure in the space below the mounting plate in the vertical cylinder decreases. When the clamping plate clamps the film, the space below the mounting plate in the vertical cylinder draws air from the empty slot through the first air pipe and the linkage assembly, and the pressure in the empty slot decreases. At this time, the film fits in the connecting slot on the empty slot, and then the clamping plate and the film are tightly sucked together under the action of pressure, thereby avoiding sliding between the film and the clamping plate to affect the test efficiency, and further improving the test efficiency.

[0023] (3) This solution sets a limit plate. When the user fixes the film on the first fixed roller and the second fixed roller respectively, the limit plate can limit the side wall of the film, thereby ensuring that the film on the first fixed roller and the second fixed roller is in a straight line, thereby avoiding the film from tilting during the fixing process, resulting in uneven force on the film during the test, and the need to spend time to retest. In the process of the mounting plate moving upward, the air flow above the mounting plate in the vertical cylinder is squeezed and flows into the pneumatic telescopic rod through the second air pipe. Then, the output end of the pneumatic telescopic rod contracts and drives the limit plate to move downward through the horizontal plate. Then, in the process of the limit plate moving downward, it gradually loses contact with the film, thereby avoiding the side wall of the limit plate affecting the test effect during the stretching process, resulting in the need for multiple tests, further improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 It is a cross-sectional view of the vertical cylinder and the mounting plate of the present invention;

[0027] Figure 4 is a cross-sectional view of the clamping plate and the vertical rod of the present invention;

[0028] Figure 5 It is a combined diagram of the vertical cylinder, vertical rod and clamping plate of the present invention;

[0029] Figure 6 It is a combined diagram of the first fixed roller, the second fixed roller, and the pressure block of the present invention;

[0030] Figure 7 This is a combined diagram of the second fixed roller, pressure block, and limit spring of the present invention;

[0031] Figure 8 It is a cross-sectional view of the pneumatic telescopic rod of the present invention.

[0032] Description of the numbers in the figure:

[0033] 1. Workbench;

[0034] 2. Fixing assembly; 201. Mounting frame; 202. Horizontal rod; 203. First fixed roller; 204. Support rod; 205. Slide rail; 206. Slider; 207. Second fixed roller; 208. Mounting frame; 209. Vertical cylinder; 210. Mounting plate; 211. Vertical rod; 212. Clamping plate;

[0035] 3. Driving assembly; 301. Vertical plate; 302. Electric tensioner; 303. Connecting frame; 304. First spring; 305. Electromagnet; 306. Magnetic block; 307. Second spring;

[0036] 401, pressure block; 402, limit spring;

[0037] 501, empty slot; 502, connecting slot; 503, first air pipe; 504, linkage assembly; 5041, linkage rod; 5042, third spring; 5044, connecting hole; 5045, exhaust valve;

[0038] 601. Horizontal plate; 602. Limit plate; 603. Pneumatic telescopic rod; 604. Second air pipe. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 8 , an aluminum-plastic composite film tensile testing device, comprising a workbench 1, on which a fixing component 2 for fixing the film is fixedly mounted;

[0041] The fixed assembly 2 includes a mounting frame 201 fixedly mounted on the top wall of the workbench 1, a horizontal rod 202 fixedly mounted on the mounting frame 201, a first fixed roller 203 evenly fixedly mounted on the horizontal rod 202, a support rod 204 fixedly mounted on the top wall of the workbench 1, a slide rail 205 fixedly mounted on the top wall of the support rod 204, a slider 206 horizontally slidably mounted in the slide rail 205, and a second fixed roller 207 fixedly mounted on the slider 206, a mounting frame 208 fixedly mounted on the second fixed roller 207, a vertical cylinder 209 fixedly mounted on the top walls of the workbench 1 and the mounting frame 208, a mounting plate 210 vertically slidably mounted in the vertical cylinder 209, a vertical rod 211 fixedly mounted on the top wall of the mounting plate 210, a clamping plate 212 fixedly mounted on the top of the vertical rod 211, and a driving assembly 3 cooperating with the mounting plate 210 is provided on the workbench 1.

[0042] The driving assembly 3 includes a vertical plate 301 vertically fixedly mounted on the top wall of the workbench 1, an electric puller 302 is fixedly mounted above the side wall of the vertical plate 301, a connecting frame 303 is fixedly mounted on the second fixed roller 207, and the output end of the electric puller 302 is fixedly connected to the connecting frame 303, a first spring 304 is jointly installed between the slider 206 and the slide rail 205, an electromagnet 305 electrically connected to the electric puller 302 is embedded in the vertical cylinder 209, a magnetic block 306 cooperating with the magnetic block 306 is embedded on the mounting plate 210, and a second spring 307 is fixedly mounted on the top wall of the mounting plate 210.

[0043] The first fixed roller 203 and the second fixed roller 207 are both provided with a limiting groove, and a pressure block 401 is horizontally slidably installed in the limiting groove, and a limiting spring 402 is installed between the pressure block 401 and the first fixed roller 203 .

[0044] When in use, first wrap one end of the film counterclockwise around the first fixed roller 203, and place the other end of the film clockwise on the second fixed roller 207, then energize the electric tensioner 302, at this time the electromagnet 305 is energized and generates a magnetic field, and then under the action of the magnetic field, the magnetic block 306 drives the corresponding mounting plate 210 to move upward, at this time the second spring 307 is compressed and has a tendency to reset, and in the process of the mounting plate 210 moving upward, the vertical rod 211 drives the clamping plate 212 to fix the films on the first fixed roller 203 and the second fixed roller 207 respectively, and then the electric tensioner 302 slowly pulls the second fixed roller 207 toward The film is moved in the direction away from the first fixed roller 203, and in the process of the movement of the second fixed roller 207, the slider 206 is driven to slide along the slide rail 205 and stretch the first spring 304. The film can be stretched in the process of the movement of the second fixed roller 207, thereby achieving the purpose of stretching the film, and performing multiple groups of tests at the same time, so that different batches of films can be tested at the same time, which is convenient for users to compare the stretching effects of different batches of films. Since the two ends of the film are respectively wrapped around the first fixed roller 203 and the second fixed roller 207, that is, in the process of stretching the film, the film is subjected to uniform tangential tension from the first fixed roller 203 and the second fixed roller 207.

[0045] During use, the user can move the tension block, at which time the limit spring 402 is stretched and has a tendency to reset. Then, after placing the film on the first fixed roller 203 and the second fixed roller 207 respectively, the limit spring 402 contracts and drives the pressure block 401 to initially clamp the film, thereby preventing the film from slipping and affecting the test efficiency, further improving the test efficiency.

[0046] like Figure 3 、 Figure 4 As shown, a slot 501 is provided on the clamping plate 212, connecting slots 502 are evenly provided on the slot 501, a first air pipe 503 is inserted on the mounting plate 210, and a linkage assembly 504 is provided on the vertical rod 211, and the first air pipe 503 is connected to the slot 501 through the linkage assembly 504.

[0047] The linkage assembly 504 includes a slide groove provided on the vertical rod 211, and a linkage rod 5041 extending into the empty slot 501 is slidably installed in the slide groove, and a third spring 5042 is installed between the bottom wall of the linkage rod 5041 and the slide groove. A connecting hole 5044 is provided on the vertical rod 211, and the first air pipe 503 is connected to the empty slot 501 through the connecting hole 5044. A first air pipe 503 is inserted into the empty slot 501, and an exhaust valve 5045 connected to the output end and the empty slot 501 is inserted into the empty slot 501.

[0048] By adopting the above technical solution, the pressure in the space below the mounting plate 210 in the vertical cylinder 209 is reduced during the upward movement of the mounting plate 210. After the clamping plate 212 clamps the film, the space below the mounting plate 210 in the vertical cylinder 209 is air-sucked from the empty slot 501 through the first air pipe 503 and the linkage assembly 504, and the pressure in the empty slot 501 is reduced. At this time, the film is in contact with the connecting slot 502 on the empty slot 501, and then the clamping plate 212 and the film are tightly sucked together under the action of pressure, thereby avoiding sliding between the film and the clamping plate 212 to affect the test efficiency, thereby further improving the test efficiency.

[0049] When the clamping plate 212 clamps the film, the connecting rod 5041 is driven to gradually contact the film and exert a reaction force on the connecting rod 5041. Under the action of the reaction force, the connecting rod 5041 slides along the slide groove and squeezes the third spring 5042. When the clamping plate 212 clamps the film, the connecting rod 5041 drives the connecting hole 5044 to connect with the first air pipe 503. At this time, the space below the mounting plate 210 in the vertical cylinder 209 can be normally inhaled through the first air pipe 503, the connecting hole 5044, the empty groove 501, and the connecting groove 502. That is, only after the clamping plate 212 clamps the film, the space below the mounting plate 210 in the vertical cylinder 209 can be normally inhaled through the first air pipe 503, the connecting hole 5044, the empty groove 501, and the connecting groove 502, thereby ensuring that the clamping plate 212 and the film can be sucked together, thereby improving the fixing effect of the film, effectively avoiding the movement of the film during the stretching process, and further improving the test efficiency.

[0050] like Figure 1 、 Figure 3 、 Figure 8 As shown, a horizontal plate 601 is provided on the top wall of the workbench 1 , and limiting plates 602 are evenly installed on the top wall of the horizontal plate 601 .

[0051] A pneumatic telescopic rod 603 is fixedly mounted on the workbench 1 , and a second air pipe 604 communicating with the vertical cylinder 209 is inserted into the input end of the pneumatic telescopic rod 603 .

[0052] By adopting the above technical solution, when the user fixes the film on the first fixed roller 203 and the second fixed roller 207 respectively, the limiting plate 602 can limit the side wall of the film, thereby ensuring that the film on the first fixed roller 203 and the second fixed roller 207 are in a straight line, thereby avoiding the film from tilting during the fixing process, resulting in uneven force on the film during the test, and the need to spend time on retesting, thereby further improving the test efficiency.

[0053] When the mounting plate 210 moves upward, the airflow in the vertical cylinder 209 above the mounting plate 210 is squeezed and flows into the pneumatic telescopic rod 603 through the second air pipe 604. Then the output end of the pneumatic telescopic rod 603 contracts and drives the horizontal plate 601 to move downward, and in the process of the horizontal plate 601 moving downward, it drives the limit plate 602 to move downward, and then in the process of the limit plate 602 moving downward, it gradually loses contact with the film, thereby avoiding the side wall of the limit plate 602 affecting the test effect during the stretching process, resulting in the need for multiple tests, and further improving the test efficiency.

[0054] When the test is over, as the electric puller 302 is powered off, the electromagnet 305 is also powered off, and then the second spring 307 contracts and drives the clamping plate 212 to reset through the mounting plate 210 and the vertical rod 211. In the process of resetting the clamping plate 212, the third spring 5042 drives the connecting rod 5041 to reset upward, and then in the process of the mounting plate 210 resetting downward, the space above the mounting plate 210 in the vertical cylinder 209 is air-sucked from the pneumatic telescopic rod 603 through the second air pipe 604, and the pneumatic telescopic rod 603 drives the limit plate 602 to reset upward through the horizontal plate 601. At the same time, the first spring 304 drives the second fixed roller 207 to reset through the slider 206, thereby preparing for work again.

[0055] The present invention also provides a testing method applicable to the above-mentioned aluminum-plastic composite film tensile testing device, comprising the following steps:

[0056] S1. When in use, the two ends of the film are respectively wound around the first fixed roller 203 and the second fixed roller 207. Then, when the electric tensioner 302 is started, the electromagnet 305 is energized and generates a magnetic field. Then, under the action of the electromagnetic field, the magnetic block 306 drives the clamping plate 212 through the mounting plate 210 and the vertical rod 211 to clamp the film.

[0057] S2, then the electric tensioner 302 slowly pulls the second fixed roller 207 to move in the direction away from the first fixed roller 203, and in the process of the movement of the second fixed roller 207, it drives the slider 206 to slide along the slide rail 205 and stretch the first spring 304. In the process of the movement of the second fixed roller 207, the film can be stretched, and multiple groups of tests can be performed at the same time, so that different batches of films can be tested at the same time, which is convenient for users to compare the stretching effects of different batches of films. Since the two ends of the film are respectively wrapped around the first fixed roller 203 and the second fixed roller 207, that is, in the process of stretching the film, the film is subjected to uniform tangential tension by the first fixed roller 203 and the second fixed roller 207;

[0058] S3. As the mounting plate 210 moves upward, the pressure in the space below the mounting plate 210 in the vertical cylinder 209 decreases. After the clamping plate 212 clamps the film, air is drawn from the empty slot 501 in the vertical cylinder 209 through the first air pipe 503 and the linkage assembly 504, thereby reducing the pressure in the empty slot 501. At this point, the film is in contact with the connecting groove 502 on the empty slot 501, and the clamping plate 212 and the film are tightly attracted together under the action of pressure.

[0059] S4. When the user fixes the film on the first fixed roller 203 and the second fixed roller 207 respectively, the limiting plate 602 can limit the side wall of the film, thereby ensuring that the film on the first fixed roller 203 and the second fixed roller 207 is in a straight line, and when the mounting plate 210 moves upward, the airflow above the mounting plate 210 in the vertical cylinder 209 is squeezed and flows into the pneumatic telescopic rod 603 through the second air pipe 604, and then the output end of the pneumatic telescopic rod 603 contracts and drives the horizontal plate 601 to move downward, and in the process of the horizontal plate 601 moving downward, it drives the limiting plate 602 to move downward, and then gradually loses contact with the film in the process of the limiting plate 602 moving downward.

[0060] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. Aluminum-plastic composite film tensile testing device, comprising a workbench (1), characterized in that: A fixing component (2) for fixing the film is fixedly mounted on the workbench (1); The fixing assembly (2) comprises a mounting frame (201) fixedly mounted on the top wall of the workbench (1), a horizontal rod (202) fixedly mounted on the mounting frame (201), a first fixed roller (203) evenly fixedly mounted on the horizontal rod (202), a support rod (204) fixedly mounted on the top wall of the workbench (1), a slide rail (205) fixedly mounted on the top wall of the support rod (204), a slider (206) horizontally slidably mounted in the slide rail (205), and a second fixed roller (203) fixedly mounted on the slider (206). A fixed roller (207), a mounting frame (208) is fixedly mounted on the second fixed roller (207), a vertical cylinder (209) is fixedly mounted on the top walls of the workbench (1) and the mounting frame (208), a mounting plate (210) is vertically slidably mounted in the vertical cylinder (209), a vertical rod (211) is fixedly mounted on the top wall of the mounting plate (210), a clamping plate (212) is fixedly mounted on the top end of the vertical rod (211), and a driving component (3) that cooperates with the mounting plate (210) is provided on the workbench (1).

2. The aluminum-plastic composite film tensile testing device according to claim 1, characterized in that: The driving assembly (3) includes a vertical plate (301) vertically fixedly mounted on the top wall of the workbench (1), an electric puller (302) is fixedly mounted above the side wall of the vertical plate (301), a connecting frame (303) is fixedly mounted on the second fixed roller (207), and the output end of the electric puller (302) is fixedly connected to the connecting frame (303), a first spring (304) is installed between the slider (206) and the slide rail (205), an electromagnet (305) electrically connected to the electric puller (302) is embedded in the vertical cylinder (209), a magnetic block (306) cooperating with the magnetic block (306) is embedded on the mounting plate (210), and a second spring (307) is fixedly mounted on the top wall of the mounting plate (210).

3. The aluminum-plastic composite film tensile testing device according to claim 2, characterized in that: A limiting groove is provided on both the first fixed roller (203) and the second fixed roller (207), and a pressure block (401) is horizontally slidably installed in the limiting groove, and a limiting spring (402) is installed between the pressure block (401) and the first fixed roller (203).

4. The aluminum-plastic composite film tensile testing device according to claim 3, characterized in that: The clamping plate (212) is provided with an empty slot (501), the empty slot (501) is evenly provided with connecting slots (502), a first air pipe (503) is inserted into the mounting plate (210), and a linkage component (504) is provided on the vertical rod (211), and the first air pipe (503) is connected to the empty slot (501) through the linkage component (504).

5. The aluminum-plastic composite film tensile testing device according to claim 4, characterized in that: The linkage assembly (504) includes a slide groove provided on the vertical rod (211), a linkage rod (5041) extending into the empty groove (501) is slidably installed in the slide groove, a third spring (5042) is installed between the bottom wall of the linkage rod (5041) and the slide groove, a connecting hole (5044) is provided on the vertical rod (211), and the first air pipe (503) is connected to the empty groove (501) through the connecting hole (5044), and the empty groove (501) is provided with a first air pipe (503) and an exhaust valve (5045) connected to the output end and the empty groove (501) is inserted into the empty groove (501).

6. The aluminum-plastic composite film tensile testing device according to claim 5, characterized in that: A horizontal plate (601) is provided on the top wall of the workbench (1), and limiting plates (602) are evenly installed on the top wall of the horizontal plate (601).

7. The aluminum-plastic composite film tensile testing device according to claim 6, characterized in that: A pneumatic telescopic rod (603) is fixedly mounted on the workbench (1), and a second air pipe (604) communicating with the vertical cylinder (209) is inserted into the input end of the pneumatic telescopic rod (603).

8. A testing method applicable to the aluminum-plastic composite film tensile testing device according to any one of claims 1 to 9, characterized in that: The steps include: S1. When in use, the two ends of the film are respectively wound on the first fixed roller (203) and the second fixed roller (207). Then, when the electric tensioner (302) is started, the electromagnet (305) is energized and generates a magnetic field. Then, under the action of the electromagnetic field, the magnetic block (306) drives the clamping plate (212) through the mounting plate (210) and the vertical rod (211) to clamp the film. S2, then the electric tensioner (302) slowly pulls the second fixed roller (207) to move in a direction away from the first fixed roller (203), and in the process of the second fixed roller (207) moving, the slider (206) is driven to slide along the slide rail (205) and stretch the first spring (304). In the process of the second fixed roller (207) moving, the film can be stretched, and multiple groups of tests can be performed at the same time, so that different batches of films can be tested at the same time, which is convenient for users to compare the stretching effects of different batches of films. Since the two ends of the film are respectively wound on the first fixed roller (203) and the second fixed roller (207), that is, in the process of stretching the film, the film is subjected to a uniform tensile force in the tangential direction of the first fixed roller (203) and the second fixed roller (207); S3. During the upward movement of the mounting plate (210), the pressure in the space below the mounting plate (210) in the vertical cylinder (209) decreases. After the clamping plate (212) clamps the film, the space below the mounting plate (210) in the vertical cylinder (209) absorbs air from the empty slot (501) through the first air pipe (503) and the linkage assembly (504), thereby reducing the pressure in the empty slot (501). At this time, the film is in contact with the connecting slot (502) on the empty slot (501), and then the clamping plate (212) and the film are tightly sucked together under the action of pressure. S4. When the user fixes the film on the first fixed roller (203) and the second fixed roller (207) respectively, the limiting plate (602) can limit the side wall of the film, thereby ensuring that the film on the first fixed roller (203) and the second fixed roller (207) are in a straight line, and when the mounting plate (210) moves upward, the air flow above the mounting plate (210) in the vertical cylinder (209) is squeezed and flows into the pneumatic telescopic rod (603) through the second air pipe (604), and then the output end of the pneumatic telescopic rod (603) contracts and drives the horizontal plate (601) to move downward, and drives the limiting plate (602) to move downward during the downward movement of the horizontal plate (601), and then gradually loses contact with the film during the downward movement of the limiting plate (602).

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