A test device for detecting the strength of a film material

Abstract

The application relates to the field of film material detection, and discloses a testing device for detecting the strength of film material. The application effectively reduces the typical stress concentration area formed in the hole edge area of an oral repair film in the process of clinical application by implementing local U-shaped cutting when the film material is in a tension loading state, can truly simulate a tearing starting path and a rupture mode, and significantly improves the representativeness and prediction ability of the test result to actual use conditions. Compared with a direct cutting tensile mode in a traditional test method, the application avoids the interference of structure damage on test data, and improves the representativeness and repeatability of hole edge strength testing. Through the cooperation and linkage of the test plate a and the test plate b, continuous testing of the complete film material and the local cutting area can be realized, the experimental efficiency is improved, the test range is expanded, and the application is suitable for comprehensive evaluation of the mechanical properties of various hole type film materials.

Description

Technical Field

[0001] This invention relates to the field of membrane material testing technology, and more specifically to a testing device for testing the strength of membrane materials. Background Technology

[0002] Oral prosthetic membranes, as a common biomedical material, are widely used in oral soft tissue regeneration, wound protection, and other oral restoration applications. They are primarily made of biomembrane materials. These membrane materials not only serve as biological barriers and carriers but also directly influence their adhesion, biocompatibility, and mechanical stability during use. With increasingly stringent clinical performance requirements for oral prosthetic membranes, the physical properties of the membrane materials, especially tensile strength and tear resistance, have become crucial indicators for product design, clinical safety assessment, and quality control.

[0003] In existing technologies, the mechanical properties of oral prosthetic membranes are typically tested using clamping and tensile tests conducted by equipment such as material testing machines. These testing devices are generally suitable for non-porous, monolithic biomembrane structures, obtaining data such as fracture strength and strain response by applying tensile force to both ends or multiple points of the material. However, some oral prosthetic membranes have pre-drilled perforations or positioning holes on their surface to adapt to the surgical area or for pre-positioning. The edges of these perforated structures are often stress concentration points, making them more prone to tearing or breakage during clinical use. Therefore, relying solely on the traditional clamping and tensile testing method for intact membranes is insufficient to comprehensively reflect the stress performance of the prosthetic membrane under actual application conditions.

[0004] In addition, although existing testing methods have attempted to cut the edge area of ​​the hole separately and then conduct tensile tests, the original structure of the membrane material has been destroyed, making it impossible to truly reproduce its mechanical response path under clinical conditions. This results in insufficient representativeness and poor stability of the test results, making it difficult to simultaneously cover the unified performance evaluation requirements of both the intact area of ​​the membrane and the edge area of ​​the hole. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a testing device for detecting the strength of membrane materials, which aims to alleviate the above problems to at least some extent.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] A testing device for detecting the strength of membrane materials includes a testing platform with a notch at the beginning of the testing platform and a placement platform disposed within the notch. The placement platform has a model opening and a model cutter is disposed on the top of the placement platform, which is adapted to the model opening.

[0008] It also includes two test plates a disposed in the notch, the bottom of the test plate a being provided with multiple positioning pins, and the bottom of the placement platform being provided with two test plates b, the test plates b also being provided with multiple positioning pins;

[0009] A test component is disposed between the test platform and the test board a, which is used to move the test board a. When the test board a moves toward the placement platform, it can be raised to a predetermined height, and when the test board a moves away from the placement platform, it can be lowered to a predetermined height.

[0010] Preferably, the test plate a has a connection port, a connecting rod is slidably connected in the connection port, a pressure sensor a is connected to the inner side wall of the connection port, and a spring a is connected between the pressure sensor and the connecting rod.

[0011] Preferably, a sliding rod is connected to the test plate b, and a movable frame is provided at the bottom of the sliding rod. The movable frame is slidably connected to the test platform, and a pressure sensor b is connected to the movable frame. A spring b is connected between the pressure sensor b and the sliding rod.

[0012] Preferably, the test component includes a rotating shaft rotatably connected to the test platform, a lead screw a at the end of the rotating shaft, a connecting frame slidably connected inside the test platform, the connecting frame being threaded onto the lead screw a, a connecting rod slidably connected to the connecting frame, and a spring c connecting the connecting rod to the connecting frame.

[0013] Preferably, a rhomboid strip is fixedly connected inside the notch, the rhomboid strip has two parallel sloping portions, and a guide rod corresponding to the rhomboid strip is connected to the side wall of the connecting rod.

[0014] Preferably, when the test component moves the test plate a, the test plate b can move synchronously;

[0015] The end of the rotating shaft is fixed with a lead screw b, the lead screw a is fixedly sleeved on the lead screw b, and the movable frame is threaded onto the lead screw b.

[0016] Preferably, a motor is connected to the side wall of the test platform, and the drive shaft of the motor is connected to the rotating shaft.

[0017] Preferably, when the test plate b moves toward the test plate a to a predetermined distance, the model cutter can move down into the model opening to cut the membrane material;

[0018] The rotating shaft is equipped with a gear, and the test platform is equipped with a rack adapted to the gear. A spring d is connected between the rack and the test platform. A connecting rod is connected to the rack, and the model cutter is fixed on the connecting rod.

[0019] Preferably, the gear is slidably connected to the outer wall of the rotating shaft via a keyway and spline, and a spring e is connected between the gear and the rotating shaft. An elastic telescopic rod is connected to the side wall of the movable frame, and a connecting ring is connected to the end of the elastic telescopic rod near the gear. The side of the connecting ring that contacts the gear is provided with multiple balls.

[0020] In summary, the present invention has the following main beneficial effects:

[0021] This invention, by performing a localized U-shaped cut on the membrane material under tension loading, effectively replicates the typical stress concentration zone formed at the edge of the pores in the clinical application of oral restorative membranes. It can realistically simulate the tear initiation path and rupture mode, significantly improving the representativeness and predictive ability of the test results for actual use conditions. Compared to the traditional tensile testing method after direct cutting, this avoids interference from structural damage on the test data, improving the representativeness and repeatability of the pore edge strength test. Through the coordinated operation of test plate a and test plate b, continuous testing of the intact membrane material and the locally cut area can be achieved, improving experimental efficiency and expanding the testing range, making it suitable for the comprehensive evaluation of the mechanical properties of various pore types of membrane materials. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the placement platform structure of the present invention;

[0025] Figure 4 This is a cross-sectional schematic diagram of the placement platform structure of the present invention;

[0026] Figure 5 yes Figure 4 Enlarged schematic diagram of the local structure at point A;

[0027] Figure 6 This is a schematic diagram of the test board a structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the rack structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the gear structure of the present invention.

[0030] Figure label:

[0031] 100. Test platform; 101. Notch; 102. Placement platform; 103. Model opening; 104. Model cutting tool; 105. Test plate a; 106. Positioning pin; 107. Test plate b;

[0032] 200. Connection port; 201. Connecting rod; 202. Pressure sensor a; 203. Spring a; 204. Sliding rod; 205. Moving frame; 206. Pressure sensor b; 207. Spring b;

[0033] 300. Shaft; 301. Lead screw a; 302. Connecting frame; 303. Spring c; 304. Diamond strip; 305. Guide rod; 306. Lead screw b; 307. Motor;

[0034] 400. Gear; 401. Rack; 402. Spring d; 403. Connecting rod; 404. Spring e; 405. Elastic telescopic rod; 406. Connecting ring. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] refer to Figures 1-8 A testing device for detecting the strength of membrane materials is disclosed in this embodiment. The testing device includes a testing platform 100, with a rectangular notch 101 in the center of the testing platform 100 for accommodating the test structure. A placement platform 102 is embedded in the notch 101. The surface of the placement platform 102 is used to lay and support the membrane material to be tested (such as a flexible membrane material like an oral repair membrane). A rectangular opening 103 is provided on the platform for partial cutting with a model cutter 104.

[0037] The model cutter 104 has an overall U-shaped structure and can move up and down vertically under drive. When the model cutter 104 moves down, it can form a U-shaped local cutting area on the membrane material, so that the cut section hangs down naturally without detaching from the membrane material body.

[0038] Within the recess 101, two test plates a105 are respectively provided on both sides of the placement platform 102, each with multiple downward-facing positioning pins 106 at its bottom. A test component connects the test platform 100 and the test plates a105. The test component can drive the test plates a105 to move towards the placement platform 102. When approaching, the test plates a105 are raised to a predetermined height to avoid the membrane material. After approaching, they automatically descend to the surface of the membrane material, causing the positioning pins 106 to contact and penetrate the membrane material to form an initial clamping. Subsequently, they move away to stretch the membrane material body.

[0039] Simultaneously, two test plates b107 are symmetrically arranged at the bottom area of ​​the placement platform 102, and each test plate b107 is also equipped with multiple upward-facing positioning pins 106. While the test component moves the test plate a105, it also moves the test plate b107 synchronously. As the test plate a105 completes clamping and pulling the membrane material, the test plate b107 moves a predetermined distance toward the test plate a105, triggering the model cutter 104 to move vertically downwards, cutting the membrane material and forming a U-shaped drooping section.

[0040] After the membrane material is cut, its drooping section is contacted and punctured by the positioning pin 106 on the test plate b107 and fixed. The test plate b107 then moves away from the test plate a105, thereby applying tension to the connection area between the drooping section and the main membrane material. This is used to simulate the stress and tearing behavior caused by tension concentration at the opening edge or around the positioning hole during the implantation or suturing of the oral repair membrane.

[0041] With the above setup, before operation, the membrane material to be tested (such as an oral prosthetic membrane) is laid flat on the surface of the placement platform 102, which is located within the recess 101 of the test platform 100. The placement platform 102 is equipped with a model opening 103 that matches the tool structure, providing a controllable downward channel for subsequent local cutting processes. This arrangement ensures that the membrane material remains fully spread in its initial state, guaranteeing accurate initial stress state and intact boundaries at the start of mechanical testing, thus improving the representativeness and reliability of the test data.

[0042] The testing process involves two test plates a105 moving towards the placement platform 102, driven by a testing component. Initially, test plates a105 are raised to avoid interference from the positioning pins 106 with the membrane material. As the test plates a105 approach the placement platform 102, they automatically descend, causing multiple downward-facing positioning pins 106 to contact and puncture the membrane material, thus forming a secure clamping. Subsequently, the test plates a105 move away from the placement platform 102, causing the membrane material to be stretched. This stage simulates the uniform tension field experienced by the oral restoration membrane in its intact state, measuring the tensile strength of its main area, demonstrating good structural stability and test repeatability. Through a height control mechanism that controls the lifting and lowering, pre-clamping avoidance and post-clamping stable traction are achieved, effectively preventing membrane wrinkling, slippage, or pre-stress disturbance, thus improving testing accuracy and membrane material utilization efficiency.

[0043] The test plate b107 is located at the bottom of the placement platform 102, and has several upward-facing positioning pins 106. While driving the test plate a105 away and applying tension to the membrane material, the test component simultaneously moves the test plate b107 towards the test plate a105 to a predetermined position to enter the cutting preparation area. At this stage, the membrane material is already under tension, and overall tension has been established, which is beneficial for forming a naturally drooping segment after subsequent cutting. By driving the test plate b107 closer and precisely aligning it after the membrane material is already under tension loading, sufficient initial pre-stress conditions can be ensured for the cut segment to have during natural drooping. This helps to realistically simulate the stress behavior of the oral restoration membrane under traction or tissue tension in the opening area, improving the representativeness of the test and its predictive ability for clinical failure modes.

[0044] Once test plate b107 moves to a predetermined distance close to test plate a105, and the membrane material has completed the first stage of tensile testing, the mold cutter 104 moves vertically downward into the mold opening 103 to complete a U-shaped partial cut of the membrane material. After cutting, the drooping section of the membrane material hangs naturally under the established tension, forming a controllable stress concentration area. Applying full membrane tension before partial cutting creates a typical "hole edge tearing stress path," more realistically reflecting the risk of breakage at the hole edge during use, and enhancing the relevance and engineering reference value of hole edge strength testing.

[0045] After cutting, the drooping section of the membrane falls to the positioning pin 106 area of ​​the test plate b107. As the test plate b107 moves, the drooping portion of the membrane is contacted and punctured by the positioning pin 106, forming a clamping end. The test plate b107 moves away from the test plate a105, causing tension changes in the drooping section. Because a significant stress concentration area is formed at the edge of the opening, this stage can simulate typical mechanical failure phenomena such as tearing and deformation caused by local tension during implantation or suture fixation of oral repair membranes.

[0046] In this application, the entire membrane material is first subjected to tension before local cutting, which creates a typical "hole-edge tearing stress path." This more realistically reflects the risk of breakage at the hole edges during use, enhancing the relevance and engineering reference value of hole-edge strength testing. This process fully incorporates the typical stress patterns of the membrane material under actual wearing or tensile conditions, avoiding problems such as uneven stress distribution and inaccurate crack paths caused by the lack of tension loading before cutting in traditional testing methods. Simultaneously, the coordinated operation of test plates a105 and b107 enables continuous loading and testing of the entire and partially cut areas under a unified testing environment. This facilitates the simultaneous acquisition of the mechanical response behavior of the oral restoration membrane under both overall structure and edge opening conditions in a single experiment, thereby improving testing efficiency and the systematic and comprehensive nature of biomechanical performance evaluation.

[0047] In this embodiment, the test plate a105 has a connection port 200, and a connecting rod 201 is slidably connected inside the connection port 200. The connecting rod 201 is connected to the test component, and one end extends into the connection port 200. A pressure sensor a202 is fixedly installed on the inner sidewall of the connection port 200, and a spring a203 is provided between the connecting rod 201 and the pressure sensor a202.

[0048] With the above setup, during the membrane material tensile test, the testing component moves the connecting rod 201 outward, and the connecting rod 201 pushes the testing plate a105 to clamp and pull the membrane material. As the force on the membrane material gradually increases, it stretches the spring a203 located in the connection port 200, causing the spring a203 to transmit force to the pressure sensor a202. The pressure sensor a202 converts this force change into an electrical signal and outputs it, realizing real-time tension monitoring during the membrane material tensile process.

[0049] This structure utilizes the elastic deformation of spring a203 as a buffer medium, which can absorb the impact load caused by sudden tearing, and can also accurately obtain stable mechanical signals through pressure sensor a202.

[0050] In this embodiment, a sliding rod 204 is connected to the test plate b107, and a movable frame 205 is connected to its bottom. A pressure sensor b206 is mounted on the movable frame 205. A spring b207 is provided between the pressure sensor b206 and the sliding rod 204.

[0051] After the tensile test on the main body area of ​​the membrane material is completed on the test plate a105, the model cutter 104 performs a partial cutting operation to form a U-shaped drooping section of the membrane material. After the positioning pin 106 on the test plate b107 contacts and fixes itself to the drooping section, it moves along the direction close to the test plate a105 under the drive of the test component, thereby applying tension to the drooping membrane section.

[0052] During this process, the tension of the drooping membrane segment is transmitted to the test plate b107 and then to the bottom moving frame 205 via the sliding rod 204. As the tension increases, the sliding rod 204 is displaced relative to the moving frame 205, stretching the spring b207 between them. The deformation of the spring b207 is then applied to the pressure sensor b206, realizing the dynamic tension detection of the stretching process in the membrane material hole edge area.

[0053] In this embodiment, the testing component includes a rotating shaft 300 rotatably mounted on a testing platform 100, with a lead screw a301 at one end. A connecting frame 302 is slidably connected within the testing platform 100, and the connecting frame 302 is threaded onto the lead screw a301. When the lead screw a301 rotates, it can drive the connecting frame 302 to move in a linear direction. A connecting rod 201 is slidably mounted on the connecting frame 302, and a spring c303 is provided between the connecting rod 201 and the connecting frame 302.

[0054] With the above setup, during operation, the rotating shaft 300 rotates, driving the lead screw a301 at its end to rotate. The lead screw a301 is threadedly connected to the connecting frame 302. The rotation of the lead screw a301 pushes the connecting frame 302 to move linearly along the slide rail within the test platform 100. The connecting rod 201 is slidably connected to the connecting frame 302 and interconnected with it via a spring c303. Driven by the connecting frame 302, the connecting rod 201 drives the test plate a105 towards the membrane material, achieving the clamping and stretching operation of the membrane material.

[0055] The spring c303 enables the connecting rod 201 to have a certain degree of flexible adjustment capability while transmitting driving force, so that when the test plate a105 moves to the placement platform 102, the height of the test plate a105 can be adjusted by rising, and when the test plate a105 reaches the predetermined position to prepare the stretch film material, the height of the test plate a105 can be adjusted by falling.

[0056] In this embodiment, a rhombus-shaped strip 304 is fixedly connected inside the recess 101. The rhombus-shaped strip 304 is composed of two parallel inclined sections and has an overall isosceles rhombus structure.

[0057] A guide rod 305 is provided on the side wall of the connecting rod 201, and the guide rod 305 contacts and engages with the rhomboid strip 304. As the test plate a105 moves toward the placement platform 102 under the rotational drive of the lead screw a301, the guide rod 305 slides along the slope of the rhomboid strip 304, causing the connecting rod 201 to move up and down, thereby driving the test plate a105 to change its overall height.

[0058] With the above configuration, when the lead screw a301 rotates to drive the connecting frame 302 and the connecting rod 201 to move the test plate a105 in the horizontal direction, the guide rod 305, which is set on the side wall of the connecting rod 201, slides relative to the slope portion of the fixed rhomboid strip 304. Since the rhomboid strip 304 is composed of two symmetrically arranged slope portions, the guide rod 305 will undergo height displacement during the sliding process, thereby causing the connecting rod 201 and the test plate a105 to move up and down as a whole.

[0059] When the test plate a105 approaches the placement platform 102, the guide rod 305 is located at the high section of the diamond strip 304, which drives the test plate a105 to be in an elevated state, effectively avoiding the membrane material and preventing the positioning needle 106 from interfering prematurely, while preparing for the subsequent puncture of the positioning needle 106.

[0060] After the test plate a105 moves to the predetermined position, the guide rod 305 continues to slide down the slope, and the test plate a105 descends accordingly, causing the positioning pin 106 to contact the membrane surface, forming a stable and effective clamping. When the test plate a105 begins to stretch the membrane in the return direction, the guide rod 305 contacts and enters another slope surface of the diamond strip 304, continuing to slide downwards, causing the test plate a105 to descend further, thereby allowing the positioning pin 106 to penetrate the membrane more deeply, enhancing the fixation stability of the membrane.

[0061] In this embodiment, a lead screw b306 is fixedly connected to the end of the rotating shaft 300. The lead screw a301 is a hollow cylindrical structure and is fixedly sleeved on the outside of the lead screw b306. The movable frame 205 is threadedly engaged with the external thread surface of the lead screw b306. When the rotating shaft 300 rotates, it drives the lead screw b306 to rotate synchronously. The lead screw b306 and the movable frame 205 have a threaded engagement structure, which can convert the rotational motion into the linear reciprocating motion of the movable frame 205.

[0062] With the above setup, during operation, the rotation of the rotating shaft 300 drives the lead screw b306 at its end to rotate synchronously, and the lead screw b306 drives the moving frame 205 to move linearly through the thread. Since the lead screw a301 is fixedly sleeved outside the lead screw b306, the whole structure forms a coaxial structure. With the help of the structural guidance, the test plate a105 and the test plate b107 can be controlled to move synchronously in relative directions at the same time.

[0063] As test plate a105 moves away from placement platform 102, it clamps and pulls the membrane material. Simultaneously, test plate b107 moves closer to mold opening 103. At this time, the membrane material is gradually stretched and a stable tension is established. When test plate b107 is about to move to the vicinity of mold opening 103, the membrane material is already in a taut state, the membrane surface in the cutting area is flat and wrinkle-free, and the tension is sufficient to resist the displacement error when the blade presses down.

[0064] At this point, the model cutter 104 moves vertically downwards to make a U-shaped cut on the membrane material. Because the membrane material already possesses tension, the cut boundary is neat, avoiding burrs or deviation in the tear path caused by membrane material relaxation. The cut segment hangs naturally under the combined action of gravity and tension. Combined with the continued movement of the test plate b107, the cut segment is less likely to adhere to the perimeter of the cut or the cutter surface, instead detaching smoothly from the original membrane surface, achieving smooth hanging and fixation.

[0065] This structure achieves synchronous driving of test plates a105 and b107 through the coaxial linkage of lead screws a301 and b306, ensuring that the membrane material has tension before cutting, thereby improving cutting accuracy and forming quality, solving common problems in traditional cutting such as membrane material relaxation, tearing and misalignment, and cut adhesion, and enhancing the reliability and applicability of the device.

[0066] In this embodiment, a motor 307 is fixedly connected to the side wall of the test platform 100, and the drive shaft of the motor 307 is connected to the rotating shaft 300 to form a drive structure.

[0067] With the above setup, during operation, the control motor 307 starts, and its drive shaft drives the connected rotating shaft 300 to rotate. The rotation of the rotating shaft 300 further drives the lead screw b306 fixed at its end to rotate synchronously. Since the moving frame 205 and the lead screw b306 are threadedly connected, the rotation is converted into linear displacement, pushing the moving frame 205 to reciprocate back and forth, and then driving the test plate a105 and test plate b107 to move in the set direction through the connecting rod 201.

[0068] Meanwhile, by utilizing the fitting structure between lead screws a301 and b306, the single-point rotation output of motor 307 can be converted into synchronous linear motion of test plate a105 and test plate b107, thereby achieving coordinated execution of clamping, stretching, cutting and other actions.

[0069] In this embodiment, a gear 400 is provided on the rotating shaft 300, and a rack 401 that meshes with the gear 400 is provided on the test platform 100. The rack 401 and the test platform 100 are elastically connected by a spring d402. A connecting rod 403 is fixedly connected to the upper end of the rack 401, and the model cutter 104 is installed at the end of the connecting rod 403.

[0070] With the above setup, after the testing device is started, the rotating shaft 300 first rotates forward, driving the gear 400 to rotate clockwise. The gear 400 meshes with the limited toothed area at the lower end of the rack 401. During the meshing process, the rack 401 is driven to move upward in the vertical direction, causing the connecting rod 403 and the model cutter 104 to be lifted as a whole. Since the toothed structure of the rack 401 only has a preset length at the lower part, when the meshing section slides out of the working range of the gear 400, the rack 401 will no longer continue to move upward. The model cutter 104 remains at a fixed lifting height, avoiding excessive rise or interference with other structures, and ensuring that the cutter is always in a safe ready position for cutting.

[0071] Simultaneously, test plate a105 moves towards placement platform 102, clamping the end of the membrane material. As the rotating shaft 300 rotates in the opposite direction, test plate a105 moves away from the membrane material and pulls it, while test plate b107 moves towards the mold opening 103, creating pre-tension in the membrane material. The rotating shaft 300 reverses, driving gear 400 to rotate counterclockwise. At this time, rack 401 moves downward under meshing drive, driving connecting rod 403 to push the mold cutter 104 downward, causing the cutter to move down into the mold opening 103 and perform a U-shaped cut on the tensioned membrane material. This achieves highly synchronized cutting execution control with the test plate's movement. By controlling the cutter's rise and fall using the rotation direction of the rotating shaft 300, it ensures that the membrane material is under tension before cutting, improving the flatness and accuracy of the cutting boundary and avoiding problems such as membrane material slack, cutting deviation, or adhesion.

[0072] In this embodiment, the gear 400 is slidably connected to the outer wall of the rotating shaft 300 via a keyway and spline, and can move relative to the rotating shaft 300 in the axial direction.

[0073] A spring e404 is connected between the gear 400 and the rotating shaft 300. The spring e404 is used to push the gear 400 to the position where it meshes with the rack 401, so as to realize the normal cutting action of the tool.

[0074] An elastic telescopic rod 405 is fixedly connected to the side wall of the movable frame 205. A connecting ring 406 is connected to the end of the elastic telescopic rod 405 near the gear 400. The end face of the connecting ring 406 is in contact with the gear 400. Multiple balls are provided on the end face to reduce the sliding friction between the elastic telescopic rod 405 and the gear 400.

[0075] With the above setup, during operation, the rotating shaft 300 rotates forward, driving the gear 400 to mesh with the rack 401, and the model cutter 104 moves upward a certain distance, making it easier for the operator to place the membrane material. When the rotating shaft 300 rotates in the opposite direction, the test plate a105 begins to move away from the placement platform 102, and the test plate b107 simultaneously moves towards the test plate a105, while the model cutter 104 moves downward to cut the membrane material.

[0076] During this process, the moving frame 205 moves with the test plate b107, and the elastic telescopic rod 405 on its side wall approaches the gear 400 accordingly. When the moving frame 205 reaches the set position, the connecting ring 406 at the end of the elastic telescopic rod 405 contacts and pushes inward the end face of the gear 400. With the help of the rolling friction reduction effect of the balls on the connecting ring 406, the thrust is concentrated on the gear 400 body, gradually overcoming the elastic restoring force of the spring e404, causing the gear 400 to slide axially and disengage from the rack 401.

[0077] Once gear 400 disengages, the corresponding cutter loses its downward drive along with connecting rod 403 and automatically returns to its original position and lifts up under the action of elastic recovery or its own limiting structure. This avoids the problem of interference or accidental pressure on the membrane surface caused by the cutter still being in a low position before the positioning pin 106 of test plate b107 is about to puncture the drooping section of the membrane.

[0078] Through the interaction between "gear 400-spring e404-spline sliding" and "test plate b107-elastic telescopic rod 405-connecting ring 406", flexible linkage and disengagement control of the tool action and the test process are realized, ensuring that the tool only participates in cutting at the designated stage and exits the cutting area in time after cutting, avoiding secondary damage to the film material or positioning failure, significantly improving the safety of the test action, the reliability of the cutting system and the intelligent coordination level of the whole machine structure.

[0079] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for detecting the strength of membrane materials, comprising a testing platform (100), wherein the testing platform (100) has a notch (101) at the beginning, and a placement platform (102) is provided within the notch (101), characterized in that, The placement platform (102) has a model opening (103), and the top of the placement platform (102) is provided with a model cutter (104) that is adapted to the model opening (103); It also includes two test plates a (105) disposed in the notch (101), the bottom of the test plate a (105) is provided with a plurality of positioning pins (106), the bottom of the placement platform (102) is provided with two test plates b (107), the test plates b (107) are also provided with a plurality of positioning pins (106). A test component located between the test platform (100) and the test plate a (105) is used to move the test plate a (105). When the test plate a (105) moves toward the placement platform (102), it can be raised to a predetermined height, and when the test plate a (105) moves away from the placement platform (102), it can be lowered to a predetermined height. While the test component drives the test plate a (105) to move, it also drives the test plate b (107) to move synchronously. When the test plate a (105) completes clamping and pulling the film material, the test plate b (107) moves towards the test plate a (105) to a predetermined distance, triggering the model cutter (104) to move vertically downward, cutting the film material and forming a U-shaped drooping section. After the membrane material is cut, its drooping section is contacted and punctured by the positioning pin (106) on the test plate b (107) and fixed. The test plate b (107) then moves away from the test plate a (105), thereby applying tension to the connection area between the drooping section and the main membrane material.

2. The testing device for detecting the strength of membrane materials according to claim 1, characterized in that, The test plate a (105) is provided with a connection port (200), a connecting rod (201) is slidably connected in the connection port (200), a pressure sensor a (202) is connected to the inner side wall of the connection port (200), and a spring a (203) is connected between the pressure sensor and the connecting rod (201).

3. The testing device for detecting the strength of membrane materials according to claim 2, characterized in that, A sliding rod (204) is connected to the test plate b (107). A movable frame (205) is provided at the bottom of the sliding rod (204). The movable frame (205) is slidably connected to the test platform (100). A pressure sensor b (206) is connected to the movable frame (205). A spring b (207) is connected between the pressure sensor b (206) and the sliding rod (204).

4. The testing device for detecting the strength of membrane materials according to claim 3, characterized in that, The test component includes a rotating shaft (300) rotatably connected to the test platform (100), a lead screw a (301) at the end of the rotating shaft (300), a connecting frame (302) slidably connected inside the test platform (100), the connecting frame (302) being threaded onto the lead screw a (301), the connecting rod (201) being slidably connected to the connecting frame (302), and a spring c (303) being connected between the connecting rod (201) and the connecting frame (302).

5. The testing device for detecting the strength of membrane materials according to claim 4, characterized in that, A rhombus strip (304) is fixedly connected inside the notch (101). The rhombus strip (304) has two parallel sloping portions. A guide rod (305) corresponding to the rhombus strip (304) is connected to the side wall of the connecting rod (201).

6. The testing device for detecting the strength of membrane materials according to claim 5, characterized in that, When the test component moves the test plate a (105), the test plate b (107) can move synchronously; The end of the rotating shaft (300) is fixed with a lead screw b (306), the lead screw a (301) is fixedly sleeved on the lead screw b (306), and the moving frame (205) is threadedly engaged with the lead screw b (306).

7. The testing device for detecting the strength of membrane materials according to claim 4, characterized in that, The test platform (100) has a motor (307) connected to its side wall, and the drive shaft of the motor (307) is connected to the rotating shaft (300).

8. A testing device for detecting the strength of membrane materials according to claim 4, characterized in that, When the test plate b (107) moves toward the test plate a (105) to a predetermined distance, the model cutter (104) can move down into the model opening (103) to cut the membrane material; The rotating shaft (300) is provided with a gear (400), the test platform (100) is provided with a rack (401) adapted to the gear (400), a spring d (402) is connected between the rack (401) and the test platform (100), a connecting rod (403) is connected to the rack (401), and the model cutter (104) is fixed on the connecting rod (403).

9. A testing device for detecting the strength of membrane materials according to claim 8, characterized in that, The gear (400) is slidably connected to the outer wall of the rotating shaft (300) via a keyway and spline, and a spring e (404) is connected between the gear (400) and the rotating shaft (300). An elastic telescopic rod (405) is connected to the side wall of the movable frame (205). A connecting ring (406) is connected to the end of the elastic telescopic rod (405) near the gear (400). A plurality of balls are provided on the side of the connecting ring (406) that contacts the gear (400).

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