A device for testing the puncture resistance of teflon film

Abstract

This invention discloses a device for testing the puncture resistance of Teflon films, relating to the field of film puncture testing. The device includes: a machine base, a hollow frame fixed to the upper end of the machine base, and a profile upright. The profile upright is internally fitted with a vertically movable testing end, and a puncture needle is fixedly fitted to the end of the testing end. A limiting mold is provided above the hollow frame. In this invention, through the cooperation of a pressing unit and an elastic support unit, the limiting mold and the support plate are separated when no puncture test is being performed. At this time, the position of the support plate can be adjusted so that a Teflon film sample on the support plate is positioned between the two. Driven by the pressing unit, the two clamp the Teflon film sample, thus performing a puncture test. For subsequent sample tests, only the position of the support plate needs to be adjusted when the limiting mold and the support plate are separated, eliminating the need for manual disassembly and assembly of the clamping mold.

Description

Technical Field

[0001] This invention relates to the field of membrane puncture detection, specifically to a device for detecting the puncture resistance of Teflon membranes. Background Technology

[0002] During the production process, Teflon films require regular and multiple random checks for puncture testing to ensure that the product quality meets standards. Puncture testing is typically performed using a puncture force testing machine.

[0003] When testing the puncture resistance of Teflon film using a puncture force testing machine, the Teflon film sample needs to be placed between an upper and lower mold. After locking the upper and lower molds, the testing head of the puncture force testing machine moves downward with the puncture needle to test the puncture resistance of the Teflon film. After the test is completed, the locking structure between the upper and lower molds needs to be released before the Teflon film can be removed and replaced. The loading and unloading method in this testing process is quite cumbersome, making it impossible to continuously test multiple Teflon film samples. Summary of the Invention

[0004] The purpose of this invention is to provide a device for testing the puncture resistance of Teflon films, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for testing the puncture resistance of a Teflon film, comprising: a machine base, a hollow frame and a profile upright fixed to the upper end of the machine base, wherein a vertically movable detection end is assembled inside the profile upright, and a puncture needle is fixedly assembled at the end of the detection end; a limiting mold is provided above the hollow frame, and an elastic support unit is provided between the hollow frame and the limiting mold; a bearing plate is provided between the hollow frame and the limiting mold, and the bearing plate is slidably fitted into the upper end of the hollow frame; the bearing plate is capable of sliding laterally at the upper end of the hollow frame; a plurality of circular holes are provided inside the bearing plate in a straight line and equidistantly distributed, and the line connecting the centers of the plurality of circular holes coincides with the center of the limiting mold; a pressing unit is also provided inside the machine base, the pressing unit being used to make the limiting mold and the bearing plate fit tightly together; The elastic support unit is used to elastically support the limiting mold. The elastic support unit includes two limiting blocks fixedly disposed on the outer surface of the hollow frame. The two limiting blocks are symmetrical about the bearing plate. A support rod is axially slidably inserted inside each limiting block. The support rod can only slide up and down. A second collar is fixedly sleeved on the outer surface of the support rod. A second spring is fixedly disposed between the second collar and the limiting block. The second spring is distributed on the outside of the support rod. An elastic connection component is disposed between the top of each support rod and the limiting mold.

[0006] Preferably, the limiting mold has a through hole at its center, and the diameter of the through hole is the same as the diameter of the circular hole.

[0007] Preferably, the elastic connection assembly includes a first collar fixedly sleeved on the upper end of the support rod, the support rod slidingly passing through the limiting mold, a first spring fixedly disposed between the bottom of the first collar and the limiting mold, and the first spring being distributed on the outside of the support rod.

[0008] Preferably, the pressing unit includes a motor fixed inside the machine base, with the output end of the motor facing upwards. A turntable is fixedly installed at the output end of the motor, and two circumferentially distributed arc-shaped trapezoidal blocks are fixedly installed on the lower end face of the turntable. A vertically distributed connecting rod is fixedly installed at the bottom of each support rod, and the end of the connecting rod away from the support rod slides in contact with the waist surface of the arc-shaped trapezoidal block. The arc-shaped trapezoidal block is a right-angled trapezoidal block, and the end of the connecting rod that contacts the arc-shaped trapezoidal block is a spherical end. The height of the arc-shaped trapezoidal block is greater than the distance between the limiting mold and the bearing plate.

[0009] Preferably, the outer surface of the limiting mold is fixedly provided with four dome pins arranged in a matrix, and the outside of each of the circular holes is also provided with four sleeve blocks arranged in a matrix. The sleeve blocks are fixed to the outer wall of the support plate, and the dome pins are inserted into the sleeve blocks. The upper end face of the hollow frame is fixedly provided with two magnetic plates, and the support plate is made of carbon alloy. The lower end of the dome pin is dome-shaped, and the inner hole edge of the sleeve block is chamfered.

[0010] Preferably, a displacement component is further provided between the support plate and the hollow frame. The displacement component is used to move the support plate in a directional manner. The displacement component includes a toothed rack fixed to the lower end face of the support plate. The toothed rack does not cover the circular hole. A second rotating shaft is rotatably inserted inside the hollow frame. A second gear is fixedly sleeved on both the upper and lower end faces of the second rotating shaft. The second gear is movably meshed with the toothed rack. The toothed rack includes a toothed section and a smooth section. The smooth section is distributed on the rightmost side of the toothed rack. A drive assembly is also provided at the bottom of the second rotating shaft.

[0011] Preferably, the drive assembly includes a toothed gear concentrically fixed to the upper surface of the turntable, a first rotating shaft rotatably mounted on the bottom of the hollow frame, and a gear disk and a first gear respectively fixed on the upper and lower surfaces of the first rotating shaft. The gear disk meshes with a second gear distributed below, and the toothed gear meshes with the first gear. The outer surface of the toothed gear has two sets of circumferentially equidistant tooth blocks, and the two sets of tooth blocks and the two arc-shaped trapezoidal blocks are circumferentially staggered. The distribution range of each set of tooth blocks is less than one-quarter arc surface of the toothed gear.

[0012] Preferably, the surface of the second rotating shaft is provided with a limiting component, the limiting component including two hinge seats fixed in the hollow frame, the two hinge seats being located at the left and right ends of the second gear, each hinge seat having a crank rod hinged to its top, the top of the crank rod being fixedly provided with an arc-shaped clamping plate, the outer surface of the second gear being fixedly fitted with a magnetic sleeve block, the inner arc surface of the arc-shaped clamping plate being movably fitted with the outer surface of the magnetic sleeve block, the magnetic sleeve block being made of neodymium iron magnetic material, and the arc-shaped clamping plate being made of carbon alloy material, the outer surface of the second gear is also provided with a trigger component.

[0013] Preferably, the actuation component includes a horizontal plate fixed between the two second rings, and the outer surface of the hollow frame is provided with a slot for the horizontal plate to slide. Both ends of the horizontal plate are rotatably mounted with sliding rods, and each of the curved rods is provided with a straight groove inside. The sliding rods located on the same side are slidably assembled inside the straight grooves.

[0014] Preferably, the outer surface of the magnetic sleeve block is fixedly provided with two arc-shaped protrusions that are circumferentially distributed, and the two arc-shaped protrusions are in contact with the vertical edges of the two arc-shaped clamping plates.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, the pressing unit and the elastic support unit work together to separate the limiting mold from the support plate when no puncture test is being performed. At this time, the position of the support plate can be adjusted so that a Teflon film sample on the support plate is located between the two. Driven by the pressing unit, the two can clamp the Teflon film sample to perform the puncture test. When testing subsequent samples, it is only necessary to adjust the position of the support plate when the limiting mold is separated from the support plate, so that there is no need for manual disassembly and assembly of the clamping mold. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support rod and motor structure of the present invention; Figure 3 This is a schematic diagram of the turntable and arc-shaped ladder block structure of the present invention; Figure 4 This is a schematic diagram showing the distribution of the missing tooth rack positions according to the present invention; Figure 5 This is a schematic diagram showing the positional distribution of the second rotating shaft and the crank of the present invention; Figure 6 This is a schematic diagram of the toothed gear and the first gear structure of the present invention; Figure 7 This is a schematic diagram of the magnetic sleeve block and arc-shaped protrusion structure of the present invention; Figure 8 This is a schematic diagram of the meshing state of the second gear and the toothed rack of the present invention.

[0017] In the diagram: 1. Equipment platform; 2. Profile upright; 3. Inspection end; 4. Puncture needle; 5. Hollow frame; 6. Limiting mold; 7. Bearing plate; 8. Round hole; 9. Sleeve block; 10. Dome pin; 11. Support rod; 12. First collar; 13. First spring; 14. Second collar; 15. Second spring; 16. Limiting block; 17. Motor; 18. Turntable; 19. Arc-shaped step block; 20. Connecting rod; 21. Gear with missing teeth; 22. First rotating shaft; 23. Gear disk; 24. First gear; 25. Second gear; 26. Second rotating shaft; 27. Hinge seat; 28. Curved rod; 29. ​​Straight groove; 30. Sliding rod; 31. Magnetic sleeve block; 32. Arc-shaped clamping plate; 33. Arc-shaped protrusion; 34. Magnetic suction plate; 35. Horizontal plate; 36. Gear with missing teeth. Detailed Implementation

[0018] 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.

[0019] Example 1: Please refer to Figures 1-8 The diagram illustrates a device for testing the puncture resistance of a Teflon film, comprising: a machine base 1, a hollow frame 5 fixed to the upper end of the machine base 1, and a profile upright 2. The profile upright 2 is internally fitted with a vertically movable testing end 3, and a puncture needle 4 is fixedly mounted at the end of the testing end 3. The program within the machine base 1 can control the vertical movement of the testing end 3. The machine base 1 is a device from the existing technology of the Zhongye Jingke brand. A limit mold 6 is provided above the hollow frame 5, and the hollow frame... An elastic support unit is provided between the hollow frame 5 and the limiting mold 6. A bearing plate 7 is provided between the hollow frame 5 and the limiting mold 6, and the bearing plate 7 is slidably embedded in the upper end of the hollow frame 5. The bearing plate 7 can slide laterally in the upper end of the hollow frame 5. Several circular holes 8 are provided inside the bearing plate 7 in a straight line and are evenly distributed. The line connecting the centers of the several circular holes 8 coincides with the center of the limiting mold 6. A pressing unit is also provided inside the machine base 1. The pressing unit is used to make the limiting mold 6 and the bearing plate 7 fit tightly together. The elastic support unit is used to elastically support the limiting mold 6. The elastic support unit includes two limiting blocks 16 fixedly disposed on the outer surface of the hollow frame 5. The two limiting blocks 16 are symmetrical about the bearing plate 7. Each limiting block 16 has a support rod 11 axially slidably inserted inside. The support rod 11 can only slide up and down. A second collar 14 is fixedly sleeved on the outer surface of the support rod 11. A second spring 15 is fixedly disposed between the second collar 14 and the limiting block 16. The second spring 15 is distributed on the outside of the support rod 11. An elastic connection component is disposed between the top of each support rod 11 and the limiting mold 6.

[0020] The limiting mold 6 has a through hole in its center, and the diameter of the through hole is the same as the diameter of the round hole 8. When one of the round holes 8 is directly below the through hole, the limiting mold 6 can move downward to clamp the Teflon film sample.

[0021] The elastic connection assembly includes a first collar 12 fixedly sleeved on the upper end of the support rod 11. The support rod 11 slides through the limiting mold 6. A first spring 13 is fixedly provided between the bottom of the first collar 12 and the limiting mold 6. The first spring 13 is distributed on the outside of the support rod 11. The support rod 11 elastically suspends the limiting mold 6 through the cooperation of the first collar 12 and the first spring 13.

[0022] The pressing unit includes a motor 17 fixed inside the machine base 1, with the output end of the motor 17 facing upwards. A turntable 18 is fixedly mounted on the output end of the motor 17, and two circumferentially equidistant arc-shaped trapezoidal blocks 19 are fixedly mounted on the lower end face of the turntable 18. Each support rod 11 has a vertically distributed connecting rod 20 fixedly mounted at its bottom, and the end of the connecting rod 20 away from the support rod 11 slides in contact with the waist surface of the arc-shaped trapezoidal block 19. The arc-shaped trapezoidal block 19 is a right-angled trapezoidal arc block, and the end of the connecting rod 20 that contacts the arc-shaped trapezoidal block 19 is a spherical end. In this part, the height of the arc-shaped step block 19 is greater than the distance between the limiting mold 6 and the bearing plate 7. When the arc-shaped step block 19 rotates with the turntable 18, the waist surface of the arc-shaped step block 19 presses the connecting rod 20 down, thereby allowing the support rod 11 to move the limiting mold 6 downward. When the arc-shaped step block 19 rotates ninety degrees, the support rod 11 can not only make the limiting mold 6 fit with the bearing plate 7, but also make the first ring 12 elastically compressed, so that the limiting mold 6 can elastically squeeze the Teflon film sample onto the bearing plate 7, ensuring the stability of the Teflon film fixation.

[0023] Four dome pins 10 arranged in a matrix are fixedly provided on the outer surface of the limiting mold 6. Four sleeve blocks 9 arranged in a matrix are also distributed outside each round hole 8. The sleeve blocks 9 are fixed to the outer wall of the support plate 7. The dome pins 10 and the sleeve blocks 9 are inserted and fitted together. Two magnetic plates 34 are fixedly provided on the upper end face of the hollow frame 5. The support plate 7 is made of carbon alloy. When the support plate 7 is placed above the hollow frame 5, the magnetic plates 34 can magnetically attract the support plate 7 to prevent the end of the support plate 7 from tilting and falling. The lower end of the dome pins 10 is dome-shaped, and the inner hole edge of the sleeve block 9 is chamfered. When the limiting mold 6 moves downward with the dome pins 10, the insertion and positioning of the dome pins 10 and the sleeve blocks 9 can ensure that the through hole and the round hole 8 in the limiting mold 6 are concentric.

[0024] Example 2: Please refer to Figures 4-8 This embodiment is a further explanation of the above embodiment. A displacement component is also provided between the support plate 7 and the hollow frame 5. The displacement component is used to move the support plate 7 in a directional manner. The displacement component includes a toothed rack 36 fixed to the lower end face of the support plate 7. The toothed rack 36 does not cover the round hole 8. A second rotating shaft 26 is rotatably inserted inside the hollow frame 5. A second gear 25 is fixedly sleeved on both the upper and lower end faces of the second rotating shaft 26. The second gear 25 is movably meshed with the toothed rack 36. The toothed rack 36 includes a toothed section and a smooth section. The smooth section is distributed on the rightmost side of the toothed rack 36. A drive assembly is also provided at the bottom of the second rotating shaft 26. Under the action of the drive assembly, the second rotating shaft 26 can be rotated. Through the meshing action of the second gear 25 and the toothed section, when the second gear 25 rotates, the toothed rack 36 can move the support plate 7 to the right.

[0025] The drive assembly includes a toothed gear 21 concentrically fixed to the upper surface of the turntable 18. A first rotating shaft 22 is rotatably mounted on the bottom of the hollow frame 5. A gear disk 23 and a first gear 24 are respectively fixed to the upper and lower surfaces of the first rotating shaft 22. The gear disk 23 meshes with a second gear 25 located below. The toothed gear 21 meshes with the first gear 24. Two sets of circumferentially spaced tooth blocks are distributed on the outer surface of the toothed gear 21, and these two sets of tooth blocks are circumferentially staggered with two arc-shaped trapezoidal blocks 19. The distribution range of each set of tooth blocks is less than a quarter arc of the toothed gear 21. The outer diameter of the toothed gear 21 is larger than the outer diameter of the first gear 24, and the outer diameter of the first gear 24 is smaller than the outer diameter of the gear disk 23. The second gear 25... The outer diameter is also smaller than that of the gear disk 23. Through differential action, when one set of tooth blocks meshes with the first gear 24, the gear disk 23 can rotate multiple times. When the turntable 18 rotates 90 degrees for the first time with the arc-shaped step block 19, it can press down on the docking rod 20 through the arc-shaped step block 19. When it rotates 90 degrees again, the docking rod 20 will first separate from the arc-shaped step block 19. At this time, the limiting mold 6 resets and moves upward. Then, the tooth blocks on the surface of the toothed gear 21 can mesh with the first gear 24, thereby allowing the first rotating shaft 22 to rotate with the gear disk 23. It should be noted that the rotation of the turntable 18 with the toothed gear 21 can only mesh with the first gear 24 as long as the docking rod 20 is not in contact with the two arc-shaped step blocks 19.

[0026] The surface of the second rotating shaft 26 is provided with limiting components, including two hinge seats 27 fixed inside the hollow frame 5. The two hinge seats 27 are located at the left and right ends of the second gear 25. Each hinge seat 27 is hinged to the top of a crank rod 28. An arc-shaped clamping plate 32 is fixedly provided on the top of the crank rod 28. A magnetic sleeve block 31 is fixedly sleeved on the outer surface of the second gear 25. The inner arc surface of the arc-shaped clamping plate 32 is movably attached to the outer surface of the magnetic sleeve block 31. The magnetic sleeve block 31 is made of neodymium iron magnetic material, and the arc-shaped clamping plate 32 is made of carbon alloy material. When the two are attached, a magnetic attraction force is generated between them. When the second gear 25 rotates with the magnetic sleeve block 31, it will be affected by magnetic damping. The outer surface of the second gear 25 is also provided with a trigger component. Under the action of the trigger component, the two crank rods 28 can swing up or down simultaneously.

[0027] The triggering component includes a horizontal plate 35 fixed between two second collars 14, and the outer surface of the hollow frame 5 is provided with a slot for sliding the horizontal plate 35. Both ends of the horizontal plate 35 are rotatably mounted with sliding rods 30. Each curved rod 28 has a straight groove 29 inside. The sliding rods 30 on the same side are slidably assembled inside the straight grooves 29. That is, when the support rod 11 moves downward with the second collars 14, the two curved rods 28 can be unfolded through the engagement of the sliding rods 30 and the straight grooves 29, so that the arc-shaped clamping plate 32 is separated from the magnetic sleeve block 31. When the support rod 11 moves upward with the second collars 14 and the horizontal plate 35, the two curved rods 28 can swing upward at the same time, and the magnetic sleeve block 31 is clamped by the two arc-shaped clamping plates 32. At this time, the clamping of the magnetic sleeve block 31 by the arc-shaped clamping plates 32 is an elastic clamping, that is, an elastic pressure is applied to the magnetic sleeve block 31.

[0028] Two arc-shaped protrusions 33 are fixedly provided on the outer surface of the magnetic sleeve block 31, and the two arc-shaped protrusions 33 are in contact with the vertical edges of the two arc-shaped clamping plates 32. That is, when the rotation of the second gear 25 can move the toothed rack 36 to the right, during the initial rotation of the second gear 25 with the magnetic sleeve block 31, the arc-shaped protrusions 33 will apply resistance to the magnetic sleeve block 31. Since the magnetic sleeve block 31 is against the edge of the arc-shaped clamping plate 32, it needs to push the arc-shaped clamping plate 32 away through the arc-shaped protrusions 33. At this time, the resistance to the rotation of the second gear 25 is the greatest.

[0029] Working principle: In the initial state, the positions of turntable 18, arc-shaped step block 19, and limiting mold 6 are referenced. Figure 3 As shown, when conducting puncture resistance tests on multiple Teflon film samples, the samples are first placed sequentially above each circular hole 8, completely covering them. Then, the operator installs the support plate 7. Installation must be done slowly to prevent the film samples from moving due to airflow. Since the two magnetic plates 34 above the hollow frame 5 can magnetically attract the carbon alloy support plate 7, the right end of the support plate 7 can be inserted into the upper part of the hollow frame 5 first. Using the magnetic attraction, the support plate 7 is then pushed to the right. During the process, the toothed section of the toothed rack 36 at the bottom of the bearing plate 7 will touch the second gear 25. At this time, the magnetic sleeve block 31 on the surface of the second rotating shaft 26 is restricted by the elastic clamping of the two arc-shaped clamping plates 32, and the magnetic sleeve block 31 will be affected by magnetic damping when rotating, as well as the obstruction of the arc-shaped protrusion 33. Therefore, during the process of pushing the bearing plate 7, the toothed section of the toothed rack 36 will encounter greater resistance after contacting the second gear 25. At this time, the operator will stop pushing. In this state, the rightmost circular hole 8 inside the bearing plate 7 is located directly below the limiting mold 6.

[0030] Motor 17 drives turntable 18 to rotate 90 degrees counterclockwise for the first time. The arc-shaped step block 19 at the bottom of turntable 18 can press down on the end of docking rod 20 through its waist surface until the end of docking rod 20 is at the bottom of arc-shaped step block 19. At this time, support rod 11 will squeeze the bearing plate 7 with the first spring 13 and limiting mold 6, so that the Teflon film sample can be clamped and limited. At this time, the detection end 3 can descend with puncture needle 4 to perform puncture test on Teflon film sample. After puncture, motor 17 continues to drive turntable 18 to rotate counterclockwise by 90 degrees for the second time. At this time, docking rod 20 will first separate from the bottom of arc-shaped step block 19. Through the reaction force of second spring 15 and first spring 13, support rod 11 and limiting mold 6 are reset. In the subsequent rotation process, a set of teeth on the surface of toothed gear 21 will mesh with first gear 24, so that first rotating shaft 22 can rotate gear disk 23 multiple times. Then, through the meshing of two second gears 25 with gear disk 23 and toothed rack 36 respectively, the bearing plate 7 can automatically slide to the right. The distance of each meshing transmission is exactly the center distance between two adjacent circular holes 8. By adjusting the gear ratio between toothed gear 21, first gear 24, gear disk 23 and second gear 25, the displacement of bearing plate 7 during each transmission can be controlled, thereby realizing automatic feeding of the next Teflon film sample without manual feeding. Motor 17 continues to drive turntable 18 to rotate 90 degrees counterclockwise for the third time, and turntable 18 rotates 90 degrees counterclockwise for the third time, which is consistent with the actions that occurred during the first and second rotations. Therefore, through the technical content of this solution, as long as the staff adjusts the position of the support plate 7 in the early stage, multiple Teflon film samples can be automatically fed and unloaded.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for testing the puncture resistance of Teflon film, characterized in that, include: The equipment base (1), a hollow frame (5) and a profile pole (2) are fixed at the upper end of the equipment base (1). The profile pole (2) is equipped with a vertically movable detection end (3), and a puncture needle (4) is fixedly installed at the end of the detection end (3). A limiting mold (6) is provided above the hollow frame (5), and an elastic support unit is provided between the hollow frame (5) and the limiting mold (6). A bearing plate (7) is provided between the hollow frame (5) and the limiting mold (6), and the bearing plate (7) is slidably embedded in the upper end of the hollow frame (5). Several circular holes (8) are opened inside the bearing plate (7) and are distributed in a straight line at equal intervals. A pressing unit is also provided inside the equipment base (1). The pressing unit is used to make the limiting mold (6) and the bearing plate (7) fit tightly together. The elastic support unit is used to elastically support the limiting mold (6). The elastic support unit includes two limiting blocks (16) fixedly disposed on the outer surface of the hollow frame (5). Each limiting block (16) has a support rod (11) inserted inside. A second collar (14) is fixed on the outer surface of the support rod (11), and a second spring (15) is fixed between the second collar (14) and the limiting block (16). An elastic connection component is provided between the top of each support rod (11) and the limiting mold (6).

2. The device for testing the puncture resistance of Teflon film according to claim 1, characterized in that: The limiting mold (6) has a through hole at its center, and the diameter of the through hole is the same as the diameter of the round hole (8).

3. The device for testing the puncture resistance of Teflon film according to claim 2, characterized in that: The elastic connection assembly includes a first collar (12) fixedly sleeved on the upper end of the support rod (11), the support rod (11) slides through the limiting mold (6), and a first spring (13) is fixedly provided between the bottom of the first collar (12) and the limiting mold (6).

4. The device for testing the puncture resistance of Teflon film according to claim 3, characterized in that: The pressing unit includes a motor (17) fixed inside the equipment base (1), with the output end of the motor (17) facing upward. A turntable (18) is fixedly provided at the output end of the motor (17), and two arc-shaped trapezoidal blocks (19) distributed equidistantly in a circle are fixedly provided on the lower end face of the turntable (18). A vertically distributed connecting rod (20) is fixedly provided at the bottom of each support rod (11), and the end of the connecting rod (20) away from the support rod (11) slides in contact with the waist surface of the arc-shaped trapezoidal block (19). The height of the arc-shaped trapezoidal block (19) is greater than the distance between the limiting mold (6) and the bearing plate (7).

5. The device for testing the puncture resistance of Teflon film according to claim 2, characterized in that: The outer surface of the limiting mold (6) is fixedly provided with four dome pins (10) arranged in a matrix. Each of the circular holes (8) is also provided with four sleeve blocks (9) arranged in a matrix. The sleeve blocks (9) are fixed to the outer wall of the bearing plate (7). The dome pins (10) are inserted into the sleeve blocks (9).

6. The device for testing the puncture resistance of Teflon film according to claim 4, characterized in that: A displacement component is also provided between the support plate (7) and the hollow frame (5). The displacement component includes a toothed rack (36) fixed to the lower end face of the support plate (7). A second rotating shaft (26) is rotatably inserted inside the hollow frame (5). A second gear (25) is fixedly sleeved on both the upper and lower end faces of the second rotating shaft (26). The second gear (25) is movably meshed with the toothed rack (36). The toothed rack (36) includes a toothed section and a smooth section. The smooth section is distributed on the rightmost side of the toothed rack (36). A drive assembly is also provided at the bottom of the second rotating shaft (26).

7. The device for testing the puncture resistance of Teflon film according to claim 6, characterized in that: The drive assembly includes a toothed gear (21) concentrically fixed on the upper surface of the turntable (18). The bottom of the hollow frame (5) is rotatably fitted with a first rotating shaft (22), and the upper and lower surfaces of the first rotating shaft (22) are respectively fixed with a gear disk (23) and a first gear (24). The gear disk (23) meshes with a second gear (25) distributed below. The toothed gear (21) meshes with the first gear (24). The outer surface of the toothed gear (21) has two sets of circumferentially equidistant tooth blocks, and the two sets of tooth blocks and the two arc-shaped trapezoidal blocks (19) are circumferentially staggered.

8. The device for testing the puncture resistance of Teflon film according to claim 6, characterized in that: The surface of the second rotating shaft (26) is provided with a limiting component, which includes two hinge seats (27) fixed inside the hollow frame (5). Each hinge seat (27) is hinged to the top of a crank rod (28). An arc-shaped clamping plate (32) is fixedly provided on the top of the crank rod (28). A magnetic sleeve block (31) is fixedly sleeved on the outer surface of the second gear (25). The inner arc surface of the arc-shaped clamping plate (32) is in movably fitted with the outer surface of the magnetic sleeve block (31). A trigger component is also provided on the outer surface of the second gear (25).

9. The device for testing the puncture resistance of Teflon film according to claim 8, characterized in that: The trigger assembly includes a horizontal plate (35) fixed between two second rings (14), and the outer surface of the hollow frame (5) is provided with a slot for sliding of the horizontal plate (35). Both ends of the horizontal plate (35) are rotatably mounted with slide rods (30). Each of the curved rods (28) is provided with a straight groove (29). The slide rods (30) located on the same side are slidably assembled inside the straight grooves (29).

10. The device for testing the puncture resistance of Teflon film according to claim 8, characterized in that: The outer surface of the magnetic sleeve block (31) is fixedly provided with two arc-shaped protrusions (33) that are equidistantly distributed around the circumference, and the two arc-shaped protrusions (33) are in vertical contact with the two arc-shaped clamping plates (32).

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