A protective film performance testing device and testing method

Abstract

The present invention relates to the field of pressure testing technology, and in particular to a protective film performance testing device and a testing method thereof. The device comprises: two side panels respectively arranged on both sides of a frame; a partition clamping mechanism, arranged on the side panels, for partition clamping of the test film body; a puncture mechanism, arranged on an assembly plate, and the puncture mechanism comprises a straight rack symmetrically arranged on the front side of the two movable plates. By setting up a partition clamping mechanism and a puncture mechanism, the partition clamping of the test film body is achieved, so that the device can synchronously perform a performance test combining stretching and puncture on the film body, so as to simplify the test process and shorten the test cycle; during the stretching test, the puncture mechanism will be synchronously turned on to perform a real-time puncture test on the film body, and the puncture rods with an upper and lower staggered layout will be used to perform progressive multi-point puncture, so as to perform continuous and accurate puncture tests on different positions of the same section of protective film, thereby enhancing the comprehensiveness and reliability of the test data.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure testing, and in particular to a protective film performance testing device and a testing method thereof. Background Art

[0002] Protective film, as a widely used material, is usually made of new polymer materials such as polyethylene, polypropylene and polyester. These materials have excellent flexibility, transparency and adhesion, and can effectively prevent the surface of objects from being scratched, contaminated and damaged.

[0003] Currently, in the production process of protective films, in order to ensure the quality of the protective films, a batch of samples will be subjected to multiple performance tests, including the common tensile strength and puncture resistance tests. However, in current routine operations, these two test processes have the following limitations: First, for these two different test items, specific equipment needs to be used separately, and the protective film samples need to be cut and other pre-processed, which not only prolongs the test cycle but also increases material consumption; second, in the puncture test, common existing equipment usually only completes the puncture of one point. If the same section of protective film is to be punctured again at different positions, the position of the protective film needs to be changed, which makes it difficult to continuously obtain accurate puncture data at different positions on the same protective film, which in turn affects the test results. Summary of the Invention

[0004] In order to overcome the problems of separate stretching and puncture testing in the above-mentioned prior art and the disadvantage of limited puncture points, the present invention provides a protective film performance testing device and a testing method thereof that can integrate stretching and multi-position puncture testing.

[0005] The technical solution is: a protective film performance testing device, including:

[0006] frame;

[0007] There are two side panels, which are respectively arranged on both sides of the frame;

[0008] A partitioned clamping mechanism is provided on the side panels and is used for the partitioned clamping of the test membrane. The partitioned clamping mechanism includes assembly plates respectively provided at the front portions of the two side panels. Two clamping frames driven by a driving member are provided to slide up and down between the two assembly plates for clamping the membrane in the puncture area. Electric threaded rods are also provided at the rear portions of the two side panels. Moving plates are threaded on the screw bodies of the two electric threaded rods. A clamping plate for clamping the stretched portion of the membrane is symmetrically slid up and down between the two moving plates. The two clamping plates are also driven by the driving member, and a load sensor for detecting the stretching force is provided on the clamping plates.

[0009] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The swing arm is connected with a up-down knob. The up-down knob is in the middle of the swing arm. The up-down knob is in the middle of the swing arm. The up-down knob is in the middle of the swing arm. The up-down knob is in the middle of the swing arm. The up-down knob is in the

[0010] As a further preferred solution, the driving parts corresponding to the clamping frame and the clamping plate are electric bidirectional threaded rod one and electric bidirectional threaded rod two, respectively. The electric bidirectional threaded rod one and the electric bidirectional threaded rod two are respectively installed on the assembly plate and the movable plate, so as to drive the clamping frame or the clamping plate to move up and down to achieve partitioned clamping.

[0011] As a further preferred solution, a loading mechanism is provided on the side panel, and the loading mechanism includes guide plates respectively provided at the front ends of the two side panels, and fixedly installed electric gears and sliding straight racks 2 are respectively provided on the guide plates, and the straight racks 2 are meshed with the driving gears of the electric gears on the same side, and a connecting rod 1 for pulling the film body to feed is provided between the front ends of the two straight racks 2, and a sliding rod is slidably provided at the rear ends of the straight racks 2, and a connecting rod 2 located on the rear side of the clamping plate is provided between the rear ends of the two sliding rods.

[0012] As a further preferred solution, the feeding mechanism also includes a front magnet and a rear magnet. The front and rear ends of the slide rod are respectively provided with a front magnet and a rear magnet. The front magnet is magnetically engaged with the two straight racks on the same side, and the rear magnet is magnetically engaged with the clamping plate.

[0013] As a further preferred solution, a material preparation mechanism is provided on the frame, and the material preparation mechanism includes bending plates respectively arranged on both sides of the frame, a central axis is rotatably arranged between the two bending plates, a rotating frame is symmetrically arranged on the central axis, and the rotating frame has forked branches distributed along the circumference and each branch has a notch, the notches of the rotating frames on both sides are cooperated for placing the rolled film, and a roller for guiding the feeding of the film is also rotatably arranged between the bending plates.

[0014] As a further preferred solution, the material preparation mechanism also includes a guide rod arranged on the branch of the rotating frame, and a limit plate is inserted into the corresponding notch and slidably arranged on the guide rod. The top surface of the limit plate is an inclined surface, and an elastic part is arranged between the limit plate and the corresponding guide rod.

[0015] As a further preferred solution, it also includes a protective frame respectively arranged on each mounting frame, the protective frame surrounds the puncture head of the corresponding puncture rod, and a closing page is also arranged on the protective frame in a circumferentially fitting and rotating manner, and a torsion spring is arranged between the closing page and the corresponding protective frame.

[0016] The testing method of the protective film performance testing device comprises the following steps:

[0017] S1. First, buckle the roll film of the batch test sample between the opposite notches of the rotating frames on both sides. The end of the roll film presses the inclined surface of the limit plate, pushing the limit plate to slide on the guide rod. The elastic member deforms accordingly until the end of the roll film buckles into the bottom of the notch. The limit plate returns to its original position under the force of the elastic member, thus fastening and limiting the two ends of the roll film.

[0018] S2. Then, the film body of the rolled film is pulled out and attached to the connecting rod 1, and then the electric gear is turned on to drive the driving gear to engage with the corresponding spur rack 2. At this time, the clamping frame and the clamping plate are in the open state, and the front magnet remains in the adsorption state with the spur rack 2, thereby driving the spur rack 2 to move forward and moving forward together with the upper component thereof. The roller synchronously guides the pulled-out film body until the connecting rod 2 moves forward and out, and then the film body is manually cut, and the end of the cut film body is attached to the connecting rod 2, and then the film body is pushed into the device by the electric gear drive;

[0019] S3, until the rear magnet moves to the rear side of the clamping plate, the electric gear stops operating, and then the electric two-way threaded rod 1 and the electric two-way threaded rod 2 are turned on, which respectively drive the clamping frame and the clamping plate to move, so that the two are closed to clamp and fix the membrane at the corresponding position, and the membrane is divided into two areas;

[0020] S4. Turn on the electric threaded rod, thereby driving the two side moving plates to move backward, causing the clamping plate and the upper membrane to move backward together. Then, the clamping plate is in contact with the rear magnet, which can push the sliding rod to move backward synchronously. As a result, under the clamping action of the clamping plate and the traction action of the second connecting rod, the rear end of the membrane is continuously stretched by the tensile force. The load sensor simultaneously monitors the applied tensile force to achieve the tensile test.

[0021] S5. During the tensile test, that is, when the movable plate moves backward, it will drive the spur rack 1 to move synchronously, so that it meshes with the corresponding full gear, thereby driving the connecting shaft and the circular plate to rotate. As the circular plate rotates, the push rod pushes the sliding frame to slide toward the membrane body in the installation frame, so that the connected pressure sensor and the puncture rod move synchronously, forcing the puncture rod to pass through the installation frame and penetrate into the membrane body, and open the closing page. As the movable plate continues to move backward, the spur rack 1 and the full gear are still in a meshing state, and then the puncture rod will be continuously pushed and gradually pressed downward. At the same time, the puncture rods at the upper and lower positions will penetrate synchronously and thereby apply pressure to the membrane body. The pressure sensor synchronously monitors the applied pressure in real time to achieve multi-point puncture testing;

[0022] S6. The unqualified membrane will tear after being pressed by the puncture rod. Then the partially torn membrane will be pulled on the puncture rod. When the puncture rod moves up and resets, it will simultaneously come into contact with the opened closing leaf. Until the puncture rod enters the installation frame, the closing leaf will close, causing the pulled membrane to be pushed away from the puncture rod by the closing leaf.

[0023] S7. After the test is completed, the signal data transmitted by the pressure sensor and the load sensor are directly recorded and counted.

[0024] The present invention overcomes the shortcomings of the prior art and has the following beneficial effects:

[0025] 1. The present invention realizes partitioned clamping of the test film by setting a partitioned clamping mechanism and a puncture mechanism, so that the device can simultaneously perform a performance test combining stretching and puncture on the film, so as to simplify the test process, shorten the test cycle, and reduce material loss. During the stretching test, the puncture mechanism will be synchronously turned on to perform a real-time puncture test on the film, and progressive multi-point puncture will be performed using the puncture rods with an upper and lower staggered layout, so as to perform continuous and accurate puncture tests on different positions of the same section of protective film, thereby enhancing the comprehensiveness and reliability of the test data.

[0026] 2. The present invention ensures the stable placement of the film roll to be tested through the design of the material preparation mechanism. Combined with the use of limit plates and elastic parts, it facilitates the loading and fixation of the film roll, while ensuring the correct guidance and positioning of the film body during the test process.

[0027] 3. The present invention adopts components such as electric gears, spur racks and magnets through the design of the feeding mechanism to achieve automatic traction and fixation of the membrane, thereby improving the convenience and efficiency of operation.

[0028] 4. The present invention designs a protective frame and a closing page on the installation frame to provide physical protection for the puncture rod to prevent accidental damage. It can also automatically remove the residual film on the puncture rod after the test, ensuring the cleanliness and accuracy of subsequent tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the three-dimensional structure of the components of the partition clamping mechanism of the present invention.

[0031] Figure 3 It is a schematic diagram of the planar structure of the partition clamping mechanism of the present invention from the left perspective.

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of some components of the puncture mechanism of the present invention.

[0033] Figure 5 This is a sectional view of the three-dimensional structure of the internal components of the mounting frame and circular plate of the present invention.

[0034] Figure 6 It is a three-dimensional structural cross-sectional view of the push rod, sliding frame, pressure sensor, puncture rod and other components of the present invention.

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the protective frame, closing page and torsion spring of the present invention.

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of some components of the feeding mechanism of the present invention.

[0037] Figure 9 This is a three-dimensional structural cross-sectional view of the connecting rod 1, the sliding rod and the connecting rod 2 of the present invention.

[0038] Figure 10 It is a schematic diagram of the three-dimensional structure of part A of the present invention.

[0039] Figure 11 This is a schematic diagram of the enlarged three-dimensional structure of part A of the present invention.

[0040] The markings in the drawings provided by the present invention are: 1, frame, 2, side plate, 3, partition clamping mechanism, 31, assembly plate, 32, electric two-way threaded rod 1, 33, clamping frame, 34, electric threaded rod, 35, moving plate, 36, electric two-way threaded rod 2, 37, clamping plate, 371, load sensor, 4, puncture mechanism, 41, straight rack 1, 42, connecting frame, 43, mounting frame, 431, protective frame, 432, closing page, 433, torsion spring, 44, circular plate, 4 41. Push rod, 442. Sliding frame, 443. Pressure sensor, 444. Piercing rod, 45. Connecting shaft, 46. Full gear, 5. Feeding mechanism, 51. Guide plate, 52. Electric gear, 53. Straight rack 2, 54. Connecting rod 1, 55. Sliding rod, 551. Front magnet, 552. Rear magnet, 56. Connecting rod 2, 6. Material preparation mechanism, 61. Bending plate, 62. Rotating frame, 621. Guide rod, 622. Limiting plate, 623. Elastic part, 63. Middle shaft, 64. Roller. DETAILED DESCRIPTION

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0042] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0043] Example: A protective film performance testing device, such as Figures 1-6 Shown, including:

[0044] Rack 1;

[0045] There are two side panels 2, which are respectively arranged on the left and right inner sides of the frame 1;

[0046] The partition clamping mechanism 3 is arranged on the side plate 2 and is used for testing the partition clamping of the membrane body. The partition clamping mechanism 3 includes assembly plates 31 respectively arranged at the front parts of the two side plates 2. The two assembly plates 31 are arranged symmetrically on the left and right, and two clamping frames 33 driven by a driving member are arranged to slide up and down between the two assembly plates 31. The middle part of the clamping frame 33 is designed to be hollowed out to facilitate the puncture test of the membrane body, and the contact surfaces of the clamping frame 33 that are in contact with the membrane body are equipped with a serrated structure to firmly clamp the membrane body, so that the membrane body can be evenly stressed and maintained in tension when subjected to the clamping force, ensuring that the puncture area remains taut during the test, thereby ensuring the accuracy and reliability of the puncture test. An electric threaded rod 34 is also fixedly provided at the rear parts of the two side plates 2. The electric threaded rod 34 consists of a motor and a screw. The screw bodies of the two electric threaded rods 34 are both threaded with a moving plate 35. The movable plate 35 can move in the front-back direction along the corresponding screw rod, and a clamping plate 37 for clamping the stretched part of the membrane is symmetrically slidably provided between the two movable plates 35. The side of the two clamping plates 37 close to each other is also provided with a serrated structure to ensure the stability of the membrane in the stretched part, and the two clamping plates 37 are also driven by a driving member, and a load sensor 371 for detecting the stretching force is provided on the clamping plate 37. The sensing element of the load sensor 371 is placed on the clamping surface of the clamping plate 37. When the clamping plates 37 on both sides are closed and clamped, the sensing element of the load sensor 371 will fit with the membrane placed therein, so that the membrane can convert the mechanical force into an electrical signal through the sensing element during the tensile test. The maximum force borne by the membrane during the stretching process can be accurately measured through the signal to evaluate the tensile strength and overall performance of the protective film.

[0047] Specifically, the driving parts corresponding to the clamping frame 33 and the clamping plate 37 are the electric bidirectional threaded rod 1 32 and the electric bidirectional threaded rod 2 36, respectively. The electric bidirectional threaded rod 1 32 and the electric bidirectional threaded rod 2 36 are respectively installed on the assembly plate 31 and the movable plate 35, so as to drive the clamping frame 33 or the clamping plate 37 to move up and down to realize partitioned clamping.

[0048] The puncture mechanism 4 is arranged on the assembly plate 31. The puncture mechanism 4 includes a straight rack 41 symmetrically arranged on the front side of the movable plate 35. The straight rack 41 and the corresponding movable plate 35 operate synchronously, so that the straight rack 41 will fit with the side plate 2 on the same side while following the movement of the movable plate 35, and form a sliding fit. A connecting frame 42 is fixedly provided at the upper and lower positions between the two assembly plates 31. The connecting frame 42 is in a concave shape with an opening facing outward, so that the closed surface of all the connecting frames 42 (referring to the bottom plate) is facing the membrane in the puncture area, and the number of the upper connecting frame 42 is one and is located in the center, while the lower connecting frame 42 There are two of them, and they are located on the front and rear sides of the upper connecting frame 42 respectively, so that the three connecting frames 42 in the upper and lower positions are staggered, so as to facilitate the subsequent multi-point puncture test of the membrane body, and a mounting frame 43 is fixedly provided in the middle of the connecting frame 42. The interior of the mounting frame 43 is hollow, and circular plates 44 are embedded and rotatably provided on the left and right sides of the mounting frame 43. A connecting shaft 45 is provided between the circular plate 44 and the same side wall of the connecting frame 42. The connecting shaft 45 is rotatably matched with the corresponding connecting frame 42, and the end of the connecting shaft 45 is connected to a full gear 46 that meshes with the spur rack 41 on the same side, so that the spur rack 41 will mesh with the full gear 46 on the same side when it slides, thereby driving the corresponding The connecting shaft 45 and the circular plate 44 rotate synchronously, and a push rod 441 is provided between the two circular plates 44 in the same mounting frame 43. The push rod 441 in the upper mounting frame 43 is initially located in the upper position. Conversely, the push rod 441 in the lower mounting frame 43 is located in the lower position. For the subsequent puncture operation and reserved movement space, a sliding frame 442 is slidingly provided in the mounting frame 43 and is pushed by the corresponding push rod 441. A straight groove for slidingly embedding the corresponding push rod 441 is provided on the sliding frame 442. A pressure sensor 443 and a puncture rod 444 are sequentially provided on the side of the sliding frame 442 facing the membrane body. The end of the puncture rod 444 passes through the corresponding mounting frame 43. , in order to apply pressure to the puncture membrane to perform a puncture test, the circular plate 44 is driven by the rotation operation, so that the connected push rod 441 follows and rotates synchronously, thereby sliding in the slot of the sliding frame 442 in accordance with the movement, and synchronously pushing the sliding frame 442 to slide up and down in the mounting frame 43. With a cycle of one hundred and eighty degrees, the sliding frame 442 will switch the movement direction once driven by the push rod 441, thereby presenting a reciprocating up and down operation, thereby driving the puncture rod 444 to operate synchronously to puncture the membrane, and then the pressure sensor 443 monitors the applied pressure during puncture in real time, thereby ensuring the accuracy of the test results.

[0049] Therefore, in summary, the device, through the setting of the above-mentioned partitioned clamping mechanism 3 and the puncture mechanism 4, enables the device to realize the combined stretching and puncture test of the same section of the membrane body, so as to shorten the test cycle and improve the overall efficiency. Subsequently, by adopting the puncture rods 444 arranged in different positions, the same section of the membrane body can accept puncture operations at different positions. Compared with the processing method of a single puncture rod 444, the overall test effect will be more comprehensive, thereby obtaining more accurate data results, so as to facilitate further quality control of the protective film production in the future.

[0050] like Figure 1 、 Figure 8 and Figure 9 As shown, a feeding mechanism 5 is provided on the side plate 2, and the feeding mechanism 5 includes a guide plate 51 respectively provided at the front end of the two side plates 2, and a fixed electric gear 52 and a slidable straight rack 2 53 are respectively provided on the guide plate 51. The straight rack 2 53 is engaged with the driving gear of the electric gear 52 on the same side, thereby driving the straight rack 2 53 to slide back and forth, and the rear end of the straight rack 2 53 is extended and sequentially slidably embedded between the clamping frame 33 and the clamping plate 37, and the front of the two straight racks 2 53 is engaged with the driving gear of the electric gear 52 on the same side. A connecting rod 1 54 is provided between the ends for pulling the membrane to feed, and a sliding rod 55 is slidably provided at the rear end of the straight rack 2 53. A connecting rod 2 56 located on the rear side of the clamping plate 37 is provided between the rear ends of the two sliding rods 55. The ends of both sides of the membrane are placed and processed respectively by the connecting rod 1 54 and the connecting rod 2 56, so that the membrane can be opened and moved into the device, and then embedded between the clamping frame 33 and the clamping plate 37 at the corresponding position to realize automatic loading processing and ensure the continuity and efficiency of the test process.

[0051] like Figure 9 As shown, the feeding mechanism 5 further includes a front magnet 551 and a rear magnet 552. The front and rear ends of the slide bar 55 are respectively provided with the front magnet 551 and the rear magnet 552. The front magnet 551 is magnetically coupled with the second straight rack 53 on the same side, so that the position between the slide bar 55 and the second straight rack 53 can be ensured to be stable during operation. The rear magnet 552 is magnetically coupled with the clamping plate 37 to comply with the subsequent film stretching. When the clamping plate 37 moves backward, the movement of the slide bar 55 is driven by the rear magnet 552, thereby ensuring the overall stretching of the film.

[0052] After the tensile test of the film is completed, the feeding mechanism 5 is reset. At this time, the rear magnet 552 is still adsorbed on the clamping plate 37. Then the electric threaded rod 34 drives the clamping plate 37 to move forward and reset, and then drives the rear magnet 552, the slide bar 55 and the connecting rod 2 56 to move forward together until the front magnet 551 is in contact with the straight rack 2 53, so that the slide bar 55 and the straight rack 2 53 return to their initial state, and the entire resetting of the feeding mechanism 5 is completed. Then the clamping plates 37 on both sides are driven to open, and the waste film after the test can be taken out.

[0053] like Figure 1 、 Figure 10 and Figure 11 As shown, a material preparation mechanism 6 is provided on the frame 1, and the material preparation mechanism 6 includes bending plates 61 respectively arranged on both sides of the frame 1, and a central axis 63 is rotatably provided between the two bending plates 61, and a rotating frame 62 is symmetrically provided on the central axis 63. There are forked branches distributed along the circumference of the rotating frame 62, and each branch has a notch. The notches of the rotating frames 62 on both sides are used for placing the rolled film. The function of the above components is to prepare and store batches of protective film rolls to be tested, ensuring sufficient materials for testing, and two rollers 64 for guiding the feeding of the film body are also rotatably provided between the bending plates 61. The rollers 64 can guide the moving direction of the film body after discharging, so that the film body can accurately enter the interior of the device, thereby completing the subsequent clamping process.

[0054] like Figure 1 、 Figure 10 and Figure 11 As shown, the material preparation mechanism 6 also includes a guide rod 621 arranged on a branch of the rotating frame 62, and a limit plate 622 inserted into the corresponding notch is slid through and slidably provided on the guide rod 621. The top surface of the limit plate 622 is inclined, so that after the end of the film reel contacts its inclined surface, it is easier to open the limit plate 622 to achieve placement, and an elastic member 623 is provided between the limit plate 622 and the corresponding guide rod 621. In this embodiment, the elastic member 623 is a spring. As the limit plate 622 moves on the guide rod 621, the elastic member 623 is squeezed to deform, providing an elastic force for the subsequent reset of the limit plate 622.

[0055] like Figure 4 and Figure 7As shown, it also includes a protective frame 431 respectively arranged on each mounting frame 43, and the protective frame 431 is all facing the placed film body. The protective frame 431 surrounds the puncture head of the corresponding puncture rod 444, and a closing page 432 is also arranged on the protective frame 431 in a circumferentially fitting and rotating manner. A torsion spring 433 is arranged between the closing page 432 and the corresponding protective frame 431. As the puncture rod 444 moves, it will push open the closing page 432 during the downward pressure process, and the torsion spring 433 will deform accordingly. At the same time, under the action of the torsion spring 433, the closing page 432 is kept in contact with the puncture rod 444, and then when the puncture rod 444 is reset, it will follow the close contact of the closing page 432 and synchronously push away the attached residual film to ensure that the puncture rod 444 is used cleanly.

[0056] Based on the above-mentioned protective film performance testing device, a testing method for the protective film performance testing device includes the following steps:

[0057] S1. First, buckle the roll film of the batch test sample between the opposite notches of the rotating frames 62 on both sides. The end of the roll film presses the inclined surface of the limiting plate 622, pushing the limiting plate 622 to slide on the guide rod 621. The elastic member 623 deforms accordingly until the end of the roll film buckles into the bottom of the notch. The limiting plate 622 returns to its original position under the force of the elastic member 623, thus fastening and limiting the two ends of the roll film.

[0058] S2. Then, the film body of the rolled film is pulled out and attached to the connecting rod 1 54, and then the electric gear 52 is turned on to drive the driving gear to engage with the corresponding straight rack 2 53. At this time, the clamping frame 33 and the clamping plate 37 are in the open state, and the front magnet 551 remains in the adsorption state with the straight rack 2 53, thereby driving the straight rack 2 53 to move forward and moving forward together with the upper components thereof. The roller 64 synchronously guides the pulled-out film body until the connecting rod 2 56 moves forward and out, and then the film body is manually cut and the cut end of the film body is attached to the connecting rod 2 56. After that, the film body is pushed into the device by the electric gear 52.

[0059] S3, until the rear magnet 552 moves to the rear side of the clamping plate 37, the operation of the electric gear 52 is stopped, and then the electric two-way threaded rod 1 32 and the electric two-way threaded rod 2 36 are turned on, which respectively drive the clamping frame 33 and the clamping plate 37 to move, so that the two are closed to clamp and fix the membrane at the corresponding position, and the membrane is divided into two areas;

[0060] S4. Turn on the electric threaded rod 34, thereby driving the two side movable plates 35 to move backward, causing the clamping plate 37 and the upper membrane to move backward together. Then, the clamping plate 37 is in contact with the rear magnet 552, which can pull the sliding rod 55 to move backward synchronously. As a result, under the clamping action of the clamping plate 37 and the traction action of the second connecting rod 56, the rear end of the membrane is continuously stretched by the tensile force. The load sensor 371 simultaneously monitors the applied tensile force to achieve the tensile test.

[0061] S5. During the tensile test, that is, when the movable plate 35 moves backward, it will drive the straight rack 41 to move synchronously, so that it will mesh with the corresponding full gear 46, so as to drive the connecting shaft 45 and the circular plate 44 to rotate. As the circular plate 44 rotates, the push rod 441 pushes the sliding frame 442 to slide toward the membrane body in the installation frame 43, so that the connected pressure sensor 443 and the puncture rod 444 move synchronously, forcing the puncture rod 444 to pass through the installation frame 43 and penetrate into the membrane body, and open the closing page 432. As the movable plate 35 continues to move backward, the straight rack 41 and the full gear 46 are still in a meshing state, and then the puncture rod 444 will be continuously pushed and gradually pressed downward. At the same time, the puncture rods 444 at the upper and lower positions will synchronously penetrate and thereby apply pressure to the membrane body. The pressure sensor 443 synchronously monitors the applied pressure in real time to achieve multi-point puncture testing;

[0062] S6. The unqualified membrane will tear after being pressed by the puncture rod 444. Then, the partially torn membrane will be pulled on the puncture rod 444. When the puncture rod 444 moves upward and resets, it will simultaneously come into contact with the opened closing leaf 432 until the puncture rod 444 enters the installation frame 43. The closing leaf 432 closes accordingly, so that the pulled membrane is pushed away from the puncture rod 444 by the closing leaf 432.

[0063] S7. After the test is completed, the signal data transmitted by the pressure sensor 443 and the load sensor 371 are directly recorded and counted.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A protective film performance testing device, comprising: Rack (1); There are two side panels (2), and the two side panels (2) are respectively arranged on both sides of the frame (1); It is characterized by further comprising: A partition clamping mechanism (3) is provided on the side plate (2) and is used for testing the partition clamping of the membrane body. The partition clamping mechanism (3) includes an assembly plate (31) respectively provided at the front portion of the two side plates (2). Two clamping frames (33) driven by a driving member are provided between the two assembly plates (31) to slide up and down for clamping the membrane body in the puncture area. An electric threaded rod (34) is also provided at the rear portion of the two side plates (2). A movable plate (35) is provided on the screw body of each of the two electric threaded rods (34). A clamping plate (37) for clamping the stretched portion of the membrane body is provided between the two movable plates (35) in a symmetrical sliding manner up and down. The two clamping plates (37) are also driven by the driving member, and a load sensor (371) for detecting the stretching force is provided on the clamping plate (37); The puncture mechanism (4) is arranged on the assembly plate (31). The puncture mechanism (4) includes a straight rack (41) symmetrically arranged on the front side of the two movable plates (35). The straight rack (41) is slidably matched with the side plate (2) on the same side, and a connecting frame (42) located at an upper and lower position is respectively provided between the two assembly plates (31). The connecting frames (42) on the upper and lower sides are arranged in a staggered layout, and a mounting frame (43) is provided in the middle of the connecting frame (42). Circular plates (44) are rotatably provided on both sides of the mounting frame (43). A connecting shaft (45) is provided between the circular plate (44) and the same side wall of the connecting frame (42). The connecting shaft (45) is connected to the corresponding connecting frame ( 42) rotationally matched, and a full gear (46) meshing with the straight rack (41) on the same side is connected to the connecting shaft (45), and a push rod (441) is provided between the circular plates (44) in the same mounting frame (43), and a sliding frame (442) pushed by the corresponding push rod (441) is slidably provided in the mounting frame (43), and a slot for slidingly embedding the corresponding push rod (441) is provided on the sliding frame (442), and a pressure sensor (443) and a puncture rod (444) are also provided on the sliding frame (442) in sequence, and the end of the puncture rod (444) passes through the corresponding mounting frame (43) to apply pressure to the puncture membrane to perform a puncture test; The driving members corresponding to the clamping frame (33) and the clamping plate (37) are respectively an electric bidirectional threaded rod 1 (32) and an electric bidirectional threaded rod 2 (36), and the electric bidirectional threaded rod 1 (32) and the electric bidirectional threaded rod 2 (36) are respectively mounted on the assembly plate (31) and the movable plate (35), so as to drive the clamping frame (33) or the clamping plate (37) to move up and down to realize partition clamping; A feeding mechanism (5) is provided on the side plate (2), and the feeding mechanism (5) includes a guide plate (51) respectively provided at the front end of the two side plates (2), and a fixed electric gear (52) and a straight rack (53) slidingly passing through the guide plate (51) are respectively provided, and the straight rack (53) is meshed with the driving gear of the electric gear (52) on the same side, and a connecting rod (54) for pulling the film body to feed is provided between the front ends of the two straight racks (53), and a sliding rod (55) is slidably provided at the rear end of the straight rack (53), and a connecting rod (56) located on the rear side of the clamping plate (37) is provided between the rear ends of the two sliding rods (55).

2. A protective film performance testing device according to claim 1, characterized in that: The feeding mechanism (5) further comprises a front magnet (551) and a rear magnet (552). The front and rear ends of the slide bar (55) are respectively provided with the front magnet (551) and the rear magnet (552). The front magnet (551) is magnetically engaged with the second straight rack (53) on the same side, and the rear magnet (552) is magnetically engaged with the clamping plate (37).

3. A protective film performance testing device according to claim 2, characterized in that: A material preparation mechanism (6) is provided on the frame (1), and the material preparation mechanism (6) includes bending plates (61) respectively provided on both sides of the frame (1), a central axis (63) is rotatably provided between the two bending plates (61), a rotating frame (62) is symmetrically provided on the central axis (63), a forked branch is distributed along the circumferential direction on the rotating frame (62), and each branch has a notch, the notches of the rotating frames (62) on both sides cooperate to place the rolled film, and a roller (64) for guiding the film feeding is also rotatably provided between the bending plates (61).

4. A protective film performance testing device according to claim 3, characterized in that: The material preparation mechanism (6) further comprises a guide rod (621) arranged on a branch of the rotating frame (62), and a limit plate (622) is slidably provided on each guide rod (621) and inserted into the corresponding notch. The top surface of the limit plate (622) is inclined, and an elastic member (623) is provided between the limit plate (622) and the corresponding guide rod (621).

5. A protective film performance testing device according to claim 4, characterized in that: The device further comprises a protective frame (431) respectively arranged on each mounting frame (43), the protective frame (431) surrounding the puncture head of the corresponding puncture rod (444), a closing page (432) being arranged on the protective frame (431) so as to rotate in a circumferentially fitting manner, and a torsion spring (433) being arranged between the closing page (432) and the corresponding protective frame (431).

6. The testing method of a protective film performance testing device according to claim 5, characterized in that: Includes: S1. First, the roll film of the batch test sample is buckled between the opposite notches of the rotating frames (62) on both sides. The end of the roll film presses the inclined surface of the limiting plate (622), pushing the limiting plate (622) to slide on the guide rod (621), and the elastic member (623) is deformed accordingly until the end of the roll film is buckled into the bottom of the notch. The limiting plate (622) is reset under the action of the elastic member (623), thereby fastening and limiting the two ends of the roll film; S2. Then, the film body of the film roll is pulled out and attached to the connecting rod 1 (54), and then the electric gear (52) is turned on to drive the driving gear to engage with the corresponding straight rack 2 (53). At this time, the clamping frame (33) and the clamping plate (37) are in the open state, and the front magnet (551) maintains the adsorption state with the straight rack 2 (53), so that while driving the straight rack 2 (53) to move forward, it moves forward together with the upper parts thereof, and the roller (64) synchronously guides the pulled film body to fit until the connecting rod 2 (56) moves forward and out, and then the film body is manually cut, and the end of the cut film body is attached to the connecting rod 2 (56), and then the film body is pushed into the device by the electric gear (52); S3, until the rear magnet (552) moves to the rear side of the clamping plate (37), the operation of the electric gear (52) is stopped, and then the electric two-way threaded rod 1 (32) and the electric two-way threaded rod 2 (36) are turned on, and the two drive the clamping frame (33) and the clamping plate (37) to move respectively, so that the two are closed respectively to clamp and fix the membrane at the corresponding position, and the membrane is divided into two parts; S4, turning on the electric threaded rod (34), thereby driving the two side moving plates (35) to move backward, causing the clamping plate (37) and the upper membrane to move backward together, and then the clamping plate (37) is in contact with the rear magnet (552), so as to push the slide bar (55) to move backward synchronously, so that under the clamping of the clamping plate (37) and the traction of the second connecting rod (56), the rear end of the membrane is continuously stretched by the tensile force, and the load sensor (371) simultaneously monitors the applied tensile force to achieve the tensile test; S5. During the tensile test, the moving plate (35) moves backward, which in turn drives the spur rack (41) to move synchronously, so that it meshes with the corresponding full gear (46), thereby driving the connecting shaft (45) and the circular plate (44) to rotate. As the circular plate (44) rotates, the push rod (441) pushes the sliding frame (442) to slide toward the membrane body in the mounting frame (43), so that the connected pressure sensor (443) and the puncture rod (444) move synchronously, forcing the puncture The rod (444) passes through the mounting frame (43) and penetrates toward the membrane body, and opens the closing page (432). As the movable plate (35) continuously moves backward, the straight rack (41) and the full gear (46) remain in a meshing state, and then the puncture rod (444) is continuously pushed and gradually pressed downward. At the same time, the puncture rods (444) at the upper and lower positions are synchronously penetrated and thereby exert pressure on the membrane body. The pressure sensor (443) synchronously monitors the applied pressure in real time, thereby realizing a multi-point puncture test. S6. The unqualified membrane will be torn after being pressed by the puncture rod (444), and then the partially torn membrane will be pulled on the puncture rod (444). When the puncture rod (444) moves up and resets, it will synchronously contact the opened closing page (432) until the puncture rod (444) enters the installation frame (43), and the closing page (432) closes accordingly, so that the pulled membrane is pushed by the closing page (432) and separated from the puncture rod (444). S7. After the test is completed, the signal data transmitted by the pressure sensor (443) and the load sensor (371) are directly recorded and counted.

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