Protective film performance testing device and testing method thereof

Abstract

The invention relates to the technical field of pressure testing, in particular to a protective film performance testing device and a testing method thereof. The device comprises two side plates arranged on the two sides of a rack respectively; the zoning clamping mechanism is arranged on the side plate and is used for zoning clamping of the test membrane body; and the puncturing mechanism is arranged on the assembling plate and comprises first straight racks symmetrically arranged on the front sides of the two moving plates correspondingly. By arranging the partition clamping mechanism and the puncturing mechanism, partition clamping of a tested film body is achieved, the device can synchronously conduct performance testing of stretching and puncturing on the film body, the testing process is simplified, and the testing period is shortened; in the stretching test process, the puncture mechanism can be synchronously started to conduct real-time puncture test on the film body, progressive multi-point puncture is conducted through the puncture rods which are arranged in an up-down staggered mode, therefore, continuous and accurate puncture test is conducted on different positions of the same section of the protective film, and the comprehensiveness and reliability of test data are enhanced.

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] At present, 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 a variety of performance tests, including the common tensile strength and puncture resistance tests. However, in the current routine operation, 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; secondly, 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 swapped, 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, comprising:

[0006] frame;

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

[0008] A partition clamping mechanism is arranged on the side plate and is used for testing the partition clamping of the membrane body. The partition clamping mechanism includes assembly plates respectively arranged at the front positions of the two side plates. Two clamping frames driven by a driving member are arranged to slide up and down between the two assembly plates to clamp the membrane body in the puncture area. Electric threaded rods are also arranged at the rear positions of the two side plates. Moving plates are threadedly arranged on the screw bodies of the two electric threaded rods. A clamping plate for clamping the stretching part of the membrane body is symmetrically slidably arranged 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 arranged on the clamping plate.

[0009] The puncture mechanism is arranged on the assembly plate, and the puncture mechanism includes a straight rack 1 symmetrically arranged on the front sides of the two moving plates, the straight rack 1 is slidably matched with the side plate on the same side, and connecting frames located at upper and lower positions are respectively arranged between the two assembly plates, the connecting frames on the upper and lower sides are staggered, and a mounting frame is arranged in the middle of the connecting frame, circular plates are rotatably arranged on both sides of the mounting frame, a connecting shaft is arranged between the circular plate and the same side wall of the connecting frame, the connecting shaft is rotatably matched with the corresponding connecting frame, and a full gear meshing with the straight rack 1 on the same side is connected to the connecting shaft, and a push rod is arranged between the circular plates in the same mounting frame, a sliding frame pushed by the corresponding push rod is slidably arranged in the mounting frame, a straight groove is opened on the sliding frame for slidingly embedding the corresponding push rod, and a pressure sensor and a puncture rod are sequentially arranged on the sliding frame, and the end of the puncture rod passes through the corresponding mounting frame to apply pressure to the puncture membrane for a puncture test.

[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. Electric bidirectional threaded rod one and 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 realize partitioned clamping.

[0011] As a further preferred scheme, a feeding mechanism is provided on the side plate, and the feeding mechanism includes guide plates respectively arranged at the front ends of the two side plates, and fixedly installed electric gears and two slidable straight racks are respectively provided on the guide plates, and the two spur racks are meshed with the driving gear of the electric gear on the same side, and a connecting rod one for pulling the film body to feed is provided between the front ends of the two spur racks, and a sliding rod is slidably provided at the rear ends of the two spur racks, and a connecting rod two 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 matched with two spur racks on the same side, and the rear magnet is magnetically matched with the clamping plate.

[0013] As a further preferred scheme, 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 circumferential direction 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 penetrated and slidably arranged on the guide rod and inserted into the corresponding notch. The top surface of the limit plate is an inclined surface, and an elastic member 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 installation frame, the protective frame surrounds the piercing head of the corresponding piercing rod, and a closing page is also arranged on the protective frame in a circumferentially fitting and rotatable 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, and the elastic member deforms accordingly until the end of the roll film buckles into the bottom of the notch. The limit plate is reset under the action of the elastic member to tighten and limit 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 mesh with the corresponding spur rack 2. At this time, the clamping frame and the clamping plate are in an open state, and the front magnet remains in an adsorption state with the spur rack 2, so that while driving the spur rack 2 to move forward, it moves forward together with the upper component, and the roller synchronously guides the pulled film body to fit until the connecting rod 2 moves forward, and then the film body is manually cut off, 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 operation of the electric gear is stopped, and then the electric bidirectional threaded rod 1 and the electric bidirectional threaded rod 2 are turned on, and the two drive the clamping frame and the clamping plate to move respectively, so that the two are closed respectively to clamp and fix the film body at the corresponding position, and the film body is divided into two areas;

[0020] S4, turn on the electric threaded rod, thereby driving the moving plates on both sides to move backward, so that the clamping plate and the membrane body on it move backward together, and then the clamping plate is in contact with the rear magnet, so as to push the sliding rod to move backward synchronously, so that under the clamping of the clamping plate and the traction of the connecting rod 2, the rear end of the membrane body is continuously stretched by the tensile force, and the load sensor simultaneously monitors the applied tensile force to realize the tensile test;

[0021] S5. During the tensile test, that is, when the moving plate is moving backward, it will drive the spur rack 1 to move synchronously, so that it will mesh with the corresponding full gear, so as to drive 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 moving 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 down. At the same time, the puncture rods at the upper and lower positions will penetrate synchronously and 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 be torn after being pressed by the puncture rod, and then the partially torn membrane will be pulled on the puncture rod. When the puncture rod moves up and resets, it will contact the opened closing leaf synchronously until the puncture rod enters the installation frame, and the closing leaf closes accordingly, so that the pulled membrane is pulled away from the puncture rod by the closing leaf.

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

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

[0025] 1. The present invention realizes the partitioned clamping of the test film body by setting up 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 body, 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 body, 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 the protective film, thereby enhancing the comprehensiveness and reliability of the test data.

[0026] 2. The present invention ensures that the film roll to be tested is stably placed through the design of the material preparation mechanism, and the use of the limit plate and the elastic member facilitates the loading and fixing of the film roll, while ensuring the correct guidance and positioning of the film body during the test.

[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 film body, 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, thereby providing physical protection for the puncture rod to prevent accidental damage, and can also automatically remove 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 three-dimensional structural schematic diagram 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 a left perspective.

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

[0033] Figure 5 It is a three-dimensional structural cross-sectional view of the internal parts of the mounting frame and the 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 protection frame, closing page and torsion spring of the present invention.

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

[0037] Fig. 9 It 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] Fig.10 It is a schematic diagram of the three-dimensional structure of part A of the present invention.

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

[0040] The marks 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, installation frame, 431, protection 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. indicate directions or positional relationships 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 limitations on the present invention.

[0042] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution 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 can be combined with each other as long as they do not conflict with each other.

[0043] Embodiment: A protective film performance testing device, such as Figure 1-Figure 6 As 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, 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 front and rear contact surfaces of the clamping frame 33 that are attached to the membrane body are equipped with serrated structures for firmly clamping 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 arranged at the rear parts of the two side plates 2. The electric threaded rod 34 is composed of a motor and a screw. The screw bodies of the two electric threaded rods 34 are both threaded with moving plates 35. The movable plate 35 can move forward and backward along the corresponding screw rod, and a clamping plate 37 for clamping the stretching part of the membrane is symmetrically slidably arranged between the two movable plates 35. The two clamping plates 37 are also provided with a serrated structure on the side close to each other to ensure the stability of the membrane at the stretching part. The two clamping plates 37 are also driven by a driving member, and a load sensor 371 for detecting the stretching force is arranged 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 stretching 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 electric bidirectional threaded rod 1 32 and 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 moving 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 be attached to the side plate 2 on the same side and form a sliding fit while following the movement of the movable plate 35. A connecting frame 42 located at the upper and lower positions is fixedly arranged between the two assembly plates 31, and the connecting frame 42 is in a concave shape with an opening facing outward, so that the closed surfaces of all the connecting frames 42 (referring to the bottom plate) are 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 respectively located on the front and rear sides of the upper connecting frame 42, so that the three connecting frames 42 at 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 arranged 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 arranged on the left and right sides of the mounting frame 43, and a connecting shaft 45 is arranged between the circular plate 44 and the same side wall of the connecting frame 42, and the connecting shaft 45 is rotatably matched with the corresponding connecting frame 42, and a full gear 46 meshing with the same side spur rack 41 is connected to the end of the connecting shaft 45, so that the spur rack 41 will synchronously mesh with the same side full gear 46 when sliding, thereby driving the corresponding The connecting shaft 45 and the circular plate 44 rotate synchronously, and a push rod 441 is arranged 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 at an upper position, whereas the push rod 441 in the lower mounting frame 43 is located at a lower position, so as to provide a space for subsequent puncture operation and reserved movement. A sliding frame 442 is slidably arranged 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 arranged in sequence on the side of the sliding frame 442 facing the membrane body, and the end of the puncture rod 444 passes through the corresponding mounting frame 43. , in order to apply pressure to the puncture membrane for 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 moving 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 arrangement of the above-mentioned partitioned clamping mechanism 3 and the puncture mechanism 4, enables the device to realize the combined stretching and puncture testing of the same section of the film 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 film 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 guarantee of the subsequent production of the protective film.

[0050] like Figure 1 , Figure 8 and Fig. 9 As shown, a feeding mechanism 5 is provided on the side plate 2, and the feeding mechanism 5 includes guide plates 51 respectively provided at the front ends of the two side plates 2, and fixedly installed electric gears 52 and slidably penetrated straight racks 53 are respectively provided on the guide plates 51, and the straight racks 53 are meshed with the driving gear of the electric gear 52 on the same side, thereby driving the straight racks 53 to slide back and forth, and the rear ends of the straight racks 53 extend and are sequentially slidably embedded between the clamping frame 33 and the clamping plate 37, and the front ends of the two straight racks 53 are connected to the clamping frame 33 and the clamping plate 37. A connecting rod 54 for pulling the film body to feed is arranged between the ends, and a sliding rod 55 is slidably arranged at the rear end of the straight rack 53, and a connecting rod 2 56 located on the rear side of the clamping plate 37 is arranged between the rear ends of the two sliding rods 55. The end portions of the two sides of the film body are placed and processed respectively by the connecting rod 1 54 and the connecting rod 2 56, so that the film body 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, so as to realize automatic feeding processing and ensure the continuity and efficiency of the test process.

[0051] like Fig. 9 As shown, the feeding mechanism 5 also 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 matched with the second spur rack 53 on the same side, so that the position between the slide bar 55 and the second spur rack 53 can be ensured to be stable during the operation of the mechanism, and the rear magnet 552 is magnetically matched with the clamping plate 37 to comply with the subsequent film stretching. When the clamping plate 37 moves backward, the slide bar 55 is driven to move 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 clamping plate 37 is driven forward and reset by the electric threaded rod 34, and then the rear magnet 552, the slide bar 55 and the connecting rod 2 56 are driven forward together until the front magnet 551 is in contact with the spur rack 2 53, so that the slide bar 55 and the spur rack 2 53 return to their initial state. The reset process of the entire feeding mechanism 5 is completed, and 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 , Fig.10 and Fig.11 As shown, a material preparation mechanism 6 is arranged on the frame 1, and the material preparation mechanism 6 includes bending plates 61 respectively arranged on both sides of the frame 1, a central axis 63 is rotatably arranged between the two bending plates 61, and a rotating frame 62 is symmetrically arranged on the central axis 63. The rotating frame 62 has forked branches distributed along the circumferential direction 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-mentioned components is to prepare and store batches of protective film rolls to be tested to ensure sufficient materials for testing, and two rollers 64 for guiding the feeding of the film body are also rotatably arranged 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 , Fig.10 and Fig.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 slidably arranged on the guide rod 621, and the top surface of the limit plate 622 is an inclined surface, so that after the end of the film reel contacts with the inclined surface, it is easier to open the limit plate 622 to achieve placement, and an elastic member 623 is arranged 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, thereby providing an elastic force for the subsequent resetting of the limit plate 622.

[0055] like Figure 4 and Figure 7As shown, it also includes a protective frame 431 respectively arranged on each installation frame 43, and the protective frame 431 is all facing the placed film body. The protective frame 431 surrounds the piercing head of the corresponding piercing rod 444, and a closing page 432 is also arranged on the protective frame 431 in a circumferentially fitting and rotatable manner. A torsion spring 433 is arranged between the closing page 432 and the corresponding protective frame 431. As the piercing rod 444 moves, the closing page 432 will be pushed open during the downward pressing process, and the torsion spring 433 will be deformed accordingly. At the same time, under the action of the torsion spring 433, the closing page 432 is kept in contact with the piercing rod 444, and then when the piercing rod 444 is reset, the residual film attached will be pushed away synchronously in accordance with the close contact of the closing page 432 to ensure the clean use of the piercing rod 444.

[0056] Based on the above 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, and 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 deforms accordingly, until the end of the roll film buckles into the bottom of the notch, and the limiting plate 622 is reset under the restoring force of the elastic member 623, thereby fastening and limiting the two ends of the roll film;

[0058] 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 mesh with the corresponding spur rack 2 53. At this time, the clamping frame 33 and the clamping plate 37 are in an open state, and the front magnet 551 maintains an adsorption state with the spur rack 2 53, so that while driving the spur 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 then the film body is manually cut off, and the cut end of the film body is attached to the connecting rod 2 56, and then the film body is driven by the electric gear 52 to be pushed into the device;

[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 bidirectional threaded rod 1 32 and the electric bidirectional 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 film body at the corresponding position, and the film body is divided into two parts;

[0060] S4, turn on the electric threaded rod 34, thereby driving the moving plates 35 on both sides to move backward, so that the clamping plate 37 and the membrane body thereon move backward together, and then the clamping plate 37 is in contact with the rear magnet 552, so as to pull the sliding rod 55 to move backward synchronously, so that under the clamping of the clamping plate 37 and the traction of the connecting rod 2 56, the rear end of the membrane body is continuously stretched by the tensile force, and the load sensor 371 simultaneously monitors the applied tensile force to realize the tensile test;

[0061] S5. During the tensile test, that is, when the movable plate 35 is moving backward, it will drive the spur 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 spur 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 down. At the same time, the puncture rods 444 at the upper and lower positions will be synchronously penetrated and exert pressure on 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 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.

[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 solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution 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 two sides of the frame (1); It is characterized by further comprising: A partition clamping mechanism (3) is arranged on the side plate (2) and is used for testing the partition clamping of the membrane. The partition clamping mechanism (3) comprises assembly plates (31) respectively arranged at the front parts of the two side plates (2). Two clamping frames (33) driven by a driving member are arranged between the two assembly plates (31) to slide up and down for clamping the membrane in the puncture area. An electric threaded rod (34) is also arranged at the rear parts of the two side plates (2). The screw bodies of the two electric threaded rods (34) are both threadedly provided with moving plates (35). A clamping plate (37) for clamping the stretched part of the membrane is symmetrically slidably arranged between the two moving plates (35). The two clamping plates (37) are also driven by the driving member, and a load sensor (371) for detecting the stretching force is arranged on the clamping plate (37); The puncture mechanism (4) is arranged on the assembly plate (31), and 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 arranged 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 arranged in the middle of the connecting frame (42), and a circular plate (44) is rotatably arranged on both sides of the mounting frame (43), and a connecting shaft (45) is arranged between the circular plate (44) and the same side wall of the connecting frame (42), and the connecting shaft (45) is connected to the corresponding connecting frame ( 42) is rotatably matched, and a full gear (46) meshing with a spur rack (41) on the same side is connected to the connecting shaft (45), and a push rod (441) is arranged 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 arranged in the mounting frame (43), and a straight groove for slidingly embedding the corresponding push rod (441) is opened on the sliding frame (442), and a pressure sensor (443) and a puncture rod (444) are also arranged in sequence on the sliding frame (442), 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.

2. A protective film performance testing device according to claim 1, characterized in that: 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). 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 moving plate (35), so as to drive the clamping frame (33) or the clamping plate (37) to move up and down to realize partition clamping.

3. A protective film performance testing device according to claim 2, characterized in that: A feeding mechanism (5) is arranged on the side plate (2), and the feeding mechanism (5) comprises guide plates (51) respectively arranged at the front ends of the two side plates (2), and the guide plates (51) are respectively provided with fixedly installed electric gears (52) and two slidable straight racks (53), and the two spur racks (53) are 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 arranged between the front ends of the two spur racks (53), and a sliding rod (55) is slidably arranged at the rear ends of the two spur racks (53), and a connecting rod (56) located at the rear side of the clamping plate (37) is arranged between the rear ends of the two sliding rods (55).

4. A protective film performance testing device according to claim 3, characterized in that: The feeding mechanism (5) also 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 matched with the second spur rack (53) on the same side, and the rear magnet (552) is magnetically matched with the clamping plate (37).

5. A protective film performance testing device according to claim 4, characterized in that: A material preparation mechanism (6) is arranged on the frame (1), and the material preparation mechanism (6) comprises bending plates (61) respectively arranged on both sides of the frame (1), a central axis (63) is rotatably arranged between the two bending plates (61), a rotating frame (62) is symmetrically arranged on the central axis (63), and the rotating frame (62) has forked branches distributed along the circumferential direction and each branch has a notch, and 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 arranged between the bending plates (61).

6. A protective film performance testing device according to claim 5, 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 arranged on the 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 arranged between the limit plate (622) and the corresponding guide rod (621).

7. A protective film performance testing device according to claim 6, characterized in that: The invention also includes a protective frame (431) respectively arranged on each installation frame (43), the protective frame (431) surrounds the piercing head of the corresponding piercing rod (444), and a closing leaf (432) is also arranged on the protective frame (431) in a circumferentially fitting and rotatable manner, and a torsion spring (433) is arranged between the closing leaf (432) and the corresponding protective frame (431).

8. The testing method of a protective film performance testing device according to claim 7, characterized in that: Included are: S1. First, buckle the roll film of the batch test sample between the opposite notches of the rotating frames (62) on both sides, and 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) deforms accordingly until the end of the roll film buckles into the bottom of the notch, and the limiting plate (622) is reset under the restoring force 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 mesh with the corresponding spur rack 2 (53). At this time, the clamping frame (33) and the clamping plate (37) are in an open state, and the front magnet (551) maintains an adsorption state with the spur rack 2 (53), so that while driving the spur rack 2 (53) to move forward, it moves forward together with the upper parts thereof, and the roller (64) synchronously guides the pulled out film body to fit until the connecting rod 2 (56) moves forward and out, and then the film body is manually cut off, and the cut end of the film body is attached to the connecting rod 2 (56), and then the film body is driven by the electric gear (52) to be pushed into the device; 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 bidirectional threaded rod 1 (32) and the electric bidirectional 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 moving plates (35) on both sides to move backward, so that the clamping plate (37) and the membrane body thereon move backward together, and then the clamping plate (37) is in contact with the rear magnet (552), so as to push the sliding rod (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 body is continuously stretched by the tensile force, and the load sensor (371) simultaneously monitors the applied tensile force to realize the tensile test; S5. During the tensile test, when the movable plate (35) moves backward, it will drive 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 installation frame (43) and penetrates toward the membrane body, and opens the closing page (432). As the moving plate (35) continues to move backward, the spur rack (41) and the full gear (46) remain in a meshing state, and then the puncture rod (444) is also 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 multi-point puncture testing; S6. The unqualified membrane will be torn after being pressed by the puncture rod (444), and then the partially torn membrane will be pulled onto 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), and the closing leaf (432) closes accordingly, so that the pulled membrane is pushed by the closing leaf (432) and separated from the puncture rod (444). S7. After the test is completed, directly record and count the signal data transmitted by the pressure sensor (443) and the load sensor (371).

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