A composite film peel strength testing device

Abstract

This invention relates to the field of composite film strength testing technology, and discloses a composite film peel strength testing device, including a testing platform with extensions on both sides. It further includes: two slidable sliding plates respectively installed within the two extensions, which can be synchronously adjusted to move closer or further apart; each of the opposite ends of the two sliding plates is provided with a clamp for clamping the single-layer membrane of the composite film separation section; a clamping assembly located within the testing platform, which clamps and limits the bonding section of the composite film, forming a Y-shape between the separation and bonding sections; and two sets of testing components. This invention, through its "Y-shaped constant angle peel" design, uniquely locks the peel surface of the composite film, keeping the peel angle constant throughout the test, achieving the effect of stably limiting the peel crack to a designated, unique interface, controlling crack initiation, and preventing deviation.

Description

Technical Field

[0001] This invention relates to the field of composite film strength testing technology, specifically to a composite film peel strength testing device. Background Technology

[0002] Composite films are thin film structures consisting of two or more layers of different materials stacked together. They are widely used in packaging, medical dressings, and functional films. Their interlayer adhesion properties directly affect the reliability of the finished product during transportation, the feel of opening the package, and the integrity of the seal.

[0003] Currently, for testing the adhesion performance between double-layer composite films, the existing technology disclosed in Chinese patent publication number CN119246237B specifically discloses a composite film tensile testing machine. Its overall structure includes a testing machine body and a lifting assembly. Upper and lower electric slide rails drive the moving clamping plate and the fixed clamping plate to complete electric clamping / releasing. Through the linkage of connecting frame—connecting rack—rotating gear—rotating frame—rotating rod—first adhesive component, the sample is automatically brought out from the clamp after clamping and testing. With the cooperation of guide rod / sliding rod / reset spring / ejection frame / second adhesive component and guide / collection frame and other mechanisms, the sample ejection and automatic collection are realized, effectively reducing the tedious steps of manual clamping, adhesive and recycling, and improving the flow efficiency of the testing process.

[0004] However, the design focus of the aforementioned prior art is on the automatic bonding, ejection and collection process, that is, the composite film tensile testing machine that automatically removes the upper and lower films from the pulling and fixing clamps. It does not focus on the selection of a unique interface and the controllable crack initiation, thus making it difficult to ensure that the peel measurement is carried out "at the specified interface" from the root. Consequently, the measured results may be erroneous due to the deviation of the peel surface. Summary of the Invention

[0005] The purpose of this invention is to provide a composite film peel strength testing device to solve at least one technical problem existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a composite film peel strength testing device, comprising a testing platform, wherein extensions are provided on both sides of the testing platform, and further comprising: Two sliding plates are respectively slidably installed in two extensions, and the two sliding plates can be adjusted to move closer or further away from each other synchronously. The opposite ends of the two sliding plates are provided with clamps for clamping the single-layer membrane of the composite membrane separation section. A clamping component is installed in the test platform, and the clamping component is used to clamp and limit the bonding section of the composite film, and to make the separation section of the composite film and the bonding section form a Y-shape. Two sets of test components were used, and both sets of test components used tension sensors to monitor in real time the tension applied to the composite membrane separation section by pulling the slide plate.

[0007] Optionally, the test assembly includes a drive frame mounted on the top of the extension and adjustable by sliding. A traction block is slidably mounted on the inner wall of the drive frame, and a tension spring is connected between the traction block and the inner wall of the drive frame. The tension sensor is used to monitor the tension of the tension spring. A connecting part extending into the drive frame is fixed to the side wall of the pull slide. Two symmetrically designed bent rods are rotatably mounted on the outer wall of the connecting part, and the bent parts of the two bent rods contact and abut against the inner wall of the drive frame. A spring is installed between the two bent rods. A hook is provided at the end of the bent rod near the traction block, and a locking block that can be hooked by the hook is fixed to the side wall of the traction block. The test assembly also includes an electrically controlled telescopic block disposed on the inner wall of the drive frame, and when the bent rod contacts the electrically controlled telescopic block, the two bent rods will rotate relative to each other and cause the hook to disengage from the locking block.

[0008] Optionally, multiple electrically controlled telescopic blocks are provided and linearly distributed on the inner wall of the drive frame. The tension sensor is connected to the multiple electrically controlled telescopic blocks by a controller via an electrical signal, and the controller is used to control the extension position of the electrically controlled telescopic blocks.

[0009] Optionally, the clamping assembly includes adjusting transverse grooves formed on the outer walls of the front and rear sides of the test platform. Two adjusting blocks are slidably installed in the adjusting transverse grooves. An adjusting screw is rotatably installed on the outer wall of the test platform through the mounting block. The adjusting screw passes through the two adjusting blocks and is threadedly connected to the through-hole of the two adjusting blocks. A clamping shaft is rotatably installed through each of the two adjusting blocks. A clamping roller is fixed on the outer wall of each clamping shaft. Bolts for locking the clamping shaft are installed on the adjusting blocks.

[0010] Optionally, the test platform has two sets of symmetrically designed transmission components on both sides. Each transmission component includes a vertical groove on the outer wall of the test platform, and a vertically adjustable lifting slider is installed in the groove. A horizontal shaft is rotatably installed through the lifting slider. A gear is fixed on the outer wall of the horizontal shaft. A rack that meshes with the gear is fixed at the bottom of the pulling slide. The horizontal shaft on the same side is connected to the clamping shaft by a transmission belt assembly.

[0011] Optionally, the clamp includes a rotating cylinder rotatably mounted on the side wall of the pull plate. The interior of the rotating cylinder is a hollow cavity, and two clamping plates are slidably mounted in the hollow cavity. The side walls of the clamping plates are provided with long grooves. The side walls of the rotating cylinder are provided with two arc grooves, and a locking ring is rotatably mounted on the side walls. The outer wall of the locking ring is fixed with two pins that pass through the arc grooves and are slidably mounted in the long grooves respectively. The outer wall of the locking ring is provided with a bolt for locking the locking ring and the rotating shaft of the rotating cylinder.

[0012] Optionally, the clamping surfaces of the two clamping plates are parallel to and in contact with the plane of the composite membrane separation section.

[0013] Optionally, guide rods are fixed to the outer walls of the two clamping plates on opposite sides, and guide holes that cooperate with the guide rods are opened on the outer wall of the rotating cylinder.

[0014] Optionally, both of the aforementioned pull-out slides are slidably mounted to the inner wall of the test platform via guide rails.

[0015] Optionally, the middle portion of the test platform is set as a transparent observation window.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: I. This invention employs a "Y-shaped constant angle peeling" design, where the sliding plates on both sides move in opposite directions synchronously, and the clamping assembly keeps the bonding section vertically at all times. This ensures that the peeling surface of the composite film is uniquely locked, and the peeling angle remains constant throughout the entire test. This achieves the effect of stably limiting the peeling crack to the designated unique interface, controlling the crack initiation, and preventing deviation. It avoids interface shift or premature fracture of a single layer due to unilateral overload, eliminates data dispersion caused by peeling path drift or angle changes, and significantly improves the accuracy and repeatability of peel strength testing.

[0017] II. This invention utilizes a mechanical loading and measurement chain consisting of a drive frame, traction block, tension spring, and tension sensor, combined with a graded triggering and automatic release structure of bending rod, hook, locking block, and electrically controlled telescopic block (different triggering positions can be set by the controller). This achieves the effect of automatically determining "whether continuous peeling" within a set constant force range and automatically releasing overload protection when an adjustable threshold is reached. It can efficiently complete batch qualification screening and can also calculate the peeling force value by combining the peeling angle, taking into account both the working condition judgment and strength quantification testing needs. Moreover, when precise quantification is required, the electrically controlled telescopic block can be fully retracted, and the tension spring can be continuously stretched until the film layer separates, thereby achieving the purpose of testing the crack initiation peak and stable peeling force.

[0018] Third, this invention uses a gear-rack-transmission belt linkage angle adjustment mechanism, which allows for stepless switching of the peeling angle simply by raising and lowering the slider. The clamp rotating cylinder rotates synchronously with the angle, ensuring that the membrane remains flat and without folds. This achieves the effect of completing multi-angle constant angle peeling tests, providing data support for the reliability of composite membranes under multi-angle stress in practical applications. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 For the present invention Figure 2 A sectional view along the middle AA; Figure 4 This is a top view of the present invention; Figure 5 This is a partially enlarged schematic diagram of the extension portion of the present invention; Figure 6 This is an exploded three-dimensional structural diagram of the fixture of the present invention; Figure 7 This is a schematic diagram of the constant-angle peeling of the composite film of the present invention; Figure 8 This is a schematic diagram showing different peel angles of the composite film of the present invention; Figure 9 This is a schematic block diagram of the controller, electronically controlled telescopic block, and tension sensor of the present invention.

[0020] In the diagram: 1. Test platform; 2. Extension section; 3. Pulling slide plate; 4. Fixture; 5. Connecting section; 6. Drive frame; 7. Traction block; 8. Tension spring; 9. Tension sensor; 10. Adjusting cross groove; 11. Adjusting block; 12. Clamping shaft; 13. Adjusting screw; 14. Lifting slider; 15. Horizontal shaft; 16. Gear; 17. Rack; 18. Clamping roller; 19. Rotating cylinder; 20. Clamping plate; 21. Locking ring; 22. Pin; 23. Arc groove; 24. Long groove; 25. Locking block; 26. Bending rod; 27. Spring; 28. Hook; 29. ​​Electrically controlled telescopic block; 30. Composite membrane; 31. Controller. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 9The present invention provides a technical solution: a composite film peel strength testing device, comprising a testing platform 1, wherein extensions 2 are provided on both sides of the testing platform 1, and further comprising: Two sliding plates 3 are respectively slidably installed in the two extensions 2, and the two sliding plates 3 can be adjusted to move closer or further away from each other synchronously. The opposite ends of the two sliding plates 3 are provided with clamps 4 for clamping the single layer membrane of the separation section of the composite membrane 30. A clamping component is provided in the test platform 1, and the clamping component is used to clamp and limit the bonding section of the composite film 30, and to make the separation section of the composite film 30 and the bonding section form a Y-shape. Two sets of test components are used, and both sets of test components use tension sensor 9 to monitor in real time the tension applied by the sliding plate 3 to the separation section of the composite membrane 30.

[0023] When using this composite film peel strength testing device, the first step is to prepare the sample. This involves cutting the composite film to be tested and pre-fabricating the initial tear. Specifically, a strip of polytetrafluoroethylene (PTFE) or release tape can be attached to the edge area of ​​the interface to be tested. This strip will not stick during lamination, thus forming a stable initial peel end. Figure 7 The section shown is segment a, while the fitting section is segment b; During testing, the two single-layer ends (i.e., the two segments a) of the composite film 30 were first connected and fixed to the two pull-slide plates 3 using clamps 4. Simultaneously, the lower bonding segment (i.e., segment b) was clamped and limited by a clamping assembly. After straightening each segment, the composite film 30 was in a Y-shape. This ensured that the pulling force applied by the two pull-slide plates 3 to the two segments a was the same, and that the peeling layer was positioned at the bonding surface. This allowed for unique interface selection of the peeling surface and controlled crack initiation (i.e.,...). Figure 7 The peeling surface shown at point C in the middle is used to prevent errors in the measurement results due to the offset of the peeling surface, thus improving the accuracy of the test results. Then, the two pull slides 3 are driven by the external structure to move synchronously away from each other and apply a pulling force to the two single-layer membranes. At the same time, the two sets of test components monitor the magnitude of the pulling force applied by the pull slides 3 to the separation section of the composite membrane 30 in real time through the tension sensor 9. The magnitude of the pulling force required for peeling can be calculated based on the angle of the applied tension, and then the peel strength performance of the composite membrane 30 can be measured.

[0024] It is worth noting that the bonding section of the composite film 30 must be vertical, and the angles of the two single-layer sections must be the same. This ensures that the peeling force applied to both sides is equal, preventing one single-layer section from experiencing excessive force while the other experiences insufficient force, which could lead to displacement of the peeling surface and eventual breakage of one single-layer section. Figure 7 The peeling surface shown in C1; In summary, by uniformly designing the force applied to both ends of a single layer, the peeling surface can be the only interface during the peel test, thereby improving the accuracy of the test results.

[0025] Furthermore, it is worth mentioning that, due to the clamping and limiting effect of the clamping assembly on the bonding section, the peeling angle does not change when the composite film 30 is peeled off, such as... Figure 7 As shown by the dashed line, this allows us to measure the bonding performance of the composite film 30 under the same stress angle, achieving the purpose of constant angle testing.

[0026] In one preferred embodiment, an implementation of the test component is provided; The test assembly includes a drive frame 6 mounted on the top of the extension 2 and adjustable by sliding. A traction block 7 is slidably mounted on the inner wall of the drive frame 6, and a tension spring 8 is connected between the traction block 7 and the inner wall of the drive frame 6. A tension sensor 9 is used to monitor the tension of the tension spring 8. A connecting part 5 extending into the drive frame 6 is fixed to the side wall of the pull slide plate 3. Two symmetrically designed bent rods 26 are rotatably mounted on the outer wall of the connecting part 5, and the bent parts of the two bent rods 26 contact and abut against the inner wall of the drive frame 6. A spring 27 is installed between the two bent rods 26. A hook 28 is set at the end of the bent rod 26 near the traction block 7, and a locking block 25 that can be hooked by the hook 28 is fixed to the side wall of the traction block 7. The test assembly also includes an electrically controlled telescopic block 29 located on the inner wall of the drive frame 6. When the bent rod 26 contacts the electrically controlled telescopic block 29, the two bent rods 26 will rotate relative to each other and cause the hook 28 to disengage from the locking block 25.

[0027] For details, please refer to [link / reference]. Figure 4 and Figure 5 When a pulling force is applied, the drive frames 6 on both sides will move away from each other synchronously. Specifically, an electric slider can be used to drive the drive frames 6 away. When the drive frames 6 move away, the hook 28 and the locking block 25 are in a hooked state. Therefore, the traction block 7 and the pulling slide plate 3 are in an integrated state through the connecting part 5. As a result, the tension spring 8 will be stretched. At the same time, the tension force applied by the tension spring 8 to the connecting part 5 is the tension force applied by the pulling slide plate 3 to the single layer of the composite film 30. By monitoring the magnitude of the tension force on the tension spring 8 through the tension sensor 9, the magnitude of the applied peel force can be deduced, and the peel strength borne by the composite film 30 can be measured. This testing method is primarily suitable for testing whether the two layers of a composite film adhere tightly within a controllable tensile force range; that is, whether peeling occurs under constant force. Specifically, for example... Figure 5 As shown: Due to the design of the electrically controlled telescopic block 29, when the drive frame 6 moves and the bent rod 26 slides relative to the inner wall of the drive frame 6, when the bent part of the bent rod 26 contacts the electrically controlled telescopic block 29, it will rotate relative to the drive frame 6 under the action of compression. At the same time, the hook 28 at its front end will rotate and eventually disengage from the locking block 25. At this time, the connecting part 5 and the traction block 7 will disconnect. This is equivalent to the force applied to the single-layer end of the composite film 30 reaching the threshold and then automatically disconnecting. Then, observe whether the composite film 30 peels off to determine whether the bonding performance of the composite film 30 meets the threshold force range. If the composite film 30 peels off, or if the composite film peels off prematurely before the bent rod 26 contacts the electrically controlled telescopic block 29, it indicates that the bonding performance of the composite film 30 is poor within the threshold force range. This method is suitable for testing a batch of composite films 30, and only requires that they pass the test.

[0028] In a further preferred embodiment, an implementation method capable of adjusting different threshold force magnitudes is provided; Multiple electrically controlled telescopic blocks 29 are provided and are linearly distributed on the inner wall of the drive frame 6. The tension sensor 9 is connected to the multiple electrically controlled telescopic blocks 29 by a controller 31 through an electrical signal, and the controller 31 is used to control the extension position of the electrically controlled telescopic blocks 29.

[0029] For details, please refer to [link / reference]. Figure 5 Since the extension length of the tension spring 8 determines the magnitude of the threshold force, multiple electrically controlled telescopic blocks 29 are designed, and the extension of the electrically controlled telescopic blocks 29 at different positions is controlled by the controller 31. This allows the contact time between the bent part of the bent rod 26 and the electrically controlled telescopic block 29 to be advanced or delayed, thereby limiting different extension amounts of the tension spring 8 and achieving the purpose of regulating different threshold force magnitudes, making the testing range larger and the applicability higher.

[0030] Furthermore, the controller 31 can control the electronically controlled telescopic block 29 to retract completely. This is equivalent to not limiting the threshold force, but rather increasing the threshold force as the tension spring 8 is stretched until the composite film 30 is peeled off. This test method can measure the minimum force that triggers continuous peeling (which can also be divided into "cracking peak" and "stable peeling force"). This measures the ultimate peel strength of the composite film, which is suitable for extreme measurements of materials or processes.

[0031] In one preferred embodiment, an implementation of a clamping assembly is provided; The clamping assembly includes adjustment slots 10 formed on the outer walls of the front and rear sides of the test platform 1. Two adjustment blocks 11 are slidably installed in the adjustment slots 10. An adjustment screw 13 is rotatably installed on the outer wall of the test platform 1 via the mounting block. The adjustment screw 13 passes through the two adjustment blocks 11 and is threadedly connected to the through-hole of the two adjustment blocks 11. A clamping shaft 12 is rotatably installed in each of the two adjustment blocks 11. A clamping roller 18 is fixed on the outer wall of each clamping shaft 12. Bolts for locking the clamping shaft 12 are installed on the adjustment blocks 11.

[0032] For details, please refer to [link / reference]. Figure 1-3 First, by rotating the adjusting screw 13, the two adjusting blocks 11 are controlled to move closer or further apart, thereby creating a gap between the two clamping shafts 12 that allows the composite film 30 to pass through. After the composite film 30 passes through and is straightened, the two clamping shafts 12 and the clamping rollers 18 are brought closer together by the adjusting blocks 11 to clamp the bonding section of the composite film 30. In this way, the composite film 30 is tangent to the two clamping rollers 18, thus ensuring the vertical state of the bonding section of the composite film 30. Secondly, after clamping, the composite film 30 can be straightened again by rotating the two clamping shafts 12. Then, the clamping shaft 12 is screwed in and tightened by adjusting the bolt on the adjusting block 11 to complete the clamping process of the composite film 30. This avoids the change in the peeling angle caused by the peeling point moving upward after the composite film 30 is peeled off, and further ensures the constant angle peeling test method.

[0033] In a further preferred embodiment, an implementation capable of switching different peeling angles is provided; The test platform 1 has two sets of symmetrically designed transmission components on both sides. The transmission components include vertical slots on the outer wall of the test platform 1, and vertically adjustable lifting sliders 14 are installed in the vertical slots. A horizontal shaft 15 is rotatably installed through the lifting slider 14. A gear 16 is fixed on the outer wall of the horizontal shaft 15. A rack 17 that can mesh with the gear 16 is fixed at the bottom of the pull plate 3. The horizontal shaft 15 on the same side is connected to the clamping shaft 12 through a transmission belt assembly.

[0034] For details, please refer to [link / reference]. Figure 1 , Figure 3 and Figure 8 After the composite film 30 is fixed in a Y-shape, the lifting slider 14 is adjusted to move it upwards and engage the gear 16 with the rack 17. Then, by driving the two pulling slides 3 closer or further apart, the rack 17 drives the gear 16 to rotate, which in turn drives the clamping shaft 12 and clamping roller 18 on the same side to rotate synchronously via the transmission belt assembly. This causes the peeling point to move up or down, and also changes the peeling angle. See [link to documentation] for details. Figure 8 ; In this way, different peel angles can be switched to perform peel tests. After adjustment, the lifting slider 14 is lowered to disengage the gear 16 from the rack 17, and the clamping shaft 12 is also locked in place with bolts. Then the above test process can be repeated.

[0035] It is worth mentioning that the transmission belt assembly includes a transmission wheel coaxially fixed on the horizontal shaft 15 and the clamping shaft 12, and the two transmission wheels are connected by an elastic transmission belt.

[0036] In one preferred embodiment, the clamp 4 includes a rotating cylinder 19 rotatably mounted on the side wall of the pull plate 3. The interior of the rotating cylinder 19 is a hollow cavity, and two clamping plates 20 are slidably mounted in the hollow cavity. The side wall of the clamping plates 20 is provided with an elongated groove 24. The side wall of the rotating cylinder 19 is provided with two arc grooves 23, and a locking ring 21 is rotatably mounted on the side wall. The outer wall of the locking ring 21 is fixed with two pins 22 that pass through the arc grooves 23 and are slidably mounted in the elongated grooves 24 respectively. The outer wall of the locking ring 21 is provided with a bolt for locking the locking ring 21 and the rotating shaft of the rotating cylinder 19.

[0037] For details, please refer to [link / reference]. Figure 3 and Figure 6 To prevent the clamping assembly from bending when clamping a single-layer section of the composite film 30, a rotating cylinder 19 is designed so that the rotating cylinder 19 will rotate together with the composite film 30 at different peeling angles, that is, the clamping surfaces of the two clamping plates 20 are parallel and in contact with the plane of the separated section of the composite film 30.

[0038] During clamping, first, the locking ring 21 needs to be rotated. This causes the two pins 22 on the ring to move the two long slots 24 and the clamping plates 20 away from each other. Then, the single-layer segment is placed into the gap between them. Next, the locking ring 21 is rotated in the opposite direction, causing the two clamping plates 20 to move closer together again and clamp and fix the separated section of the composite membrane 30. Finally, the bolts are screwed in and the rotating shaft of the rotating cylinder 19 is tightened. Specifically, as follows... Figure 6 As shown, the bolt has the same locking method as the clamping shaft 12 mentioned above, making the operation simpler and more convenient.

[0039] In one preferred embodiment, guide rods are fixed to the outer walls of the back sides of both clamping plates 20, and guide holes that cooperate with the guide rods are opened on the outer wall of the rotating cylinder 19.

[0040] See Figure 6 The clamping plate 20 can form a sliding limit through the cooperation of the guide rod and the guide hole on the rotating cylinder 19, so that after the two clamping plates 20 are clamped, their clamping surfaces coincide with the diameter line of the rotating cylinder 19.

[0041] In one preferred embodiment, both pull-out slides 3 are slidably mounted to the inner wall of the test platform 1 via guide rails.

[0042] In one preferred embodiment, the middle portion of the test platform 1 is configured as a transparent observation window.

[0043] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0044] 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 composite film peel strength testing device, comprising a testing platform (1), wherein extensions (2) are provided on both sides of the testing platform (1), characterized in that, It also includes: two pull slides (3) that are slidably installed in the two extensions (2), and the two pull slides (3) can be adjusted to move closer or further away from each other synchronously. The opposite ends of the two pull slides (3) are provided with clamps (4) for clamping the single layer of the composite membrane (30) separation section; a clamping assembly provided in the test platform (1), and the clamping assembly is used to clamp and limit the bonding section of the composite membrane (30) and make the separation section of the composite membrane (30) and the bonding section form a Y-shape; two sets of test components, and both sets of test components use tension sensors (9) to monitor the tension applied by the pull slides (3) to the separation section of the composite membrane (30) in real time. The clamping assembly includes adjustment slots (10) on the outer walls of the front and rear sides of the test platform (1). Two adjustment blocks (11) are slidably installed in the adjustment slots (10). An adjustment screw (13) is rotatably installed on the outer wall of the test platform (1) through the mounting block. The adjustment screw (13) passes through the two adjustment blocks (11) and is threadedly connected to the through-hole of the two adjustment blocks (11). A clamping shaft (12) is rotatably installed in each of the two adjustment blocks (11). A clamping roller (18) is fixed on the outer wall of each clamping shaft (12). A bolt for locking the clamping shaft (12) is installed on the adjustment block (11).

2. The composite film peel strength testing device according to claim 1, characterized in that: The test assembly includes a drive frame (6) mounted on top of the extension (2) and adjustable by sliding. A traction block (7) is slidably mounted on the inner wall of the drive frame (6), and a tension spring (8) is connected between the traction block (7) and the inner wall of the drive frame (6). The tension sensor (9) is used to monitor the tension of the tension spring (8). A connecting part (5) extending into the drive frame (6) is fixed to the side wall of the pull slide (3). Two symmetrically designed curved rods (26) are rotatably mounted on the outer wall of the connecting part (5), and the two curved rods (26) are... The bent part of the rod contacts and abuts against the inner wall of the drive frame (6). A spring (27) is installed between the two bent rods (26). The end of the bent rod (26) near the traction block (7) is provided as a hook (28). The side wall of the traction block (7) is fixed with a locking block (25) that can hook the hook (28). The test assembly also includes an electrically controlled telescopic block (29) provided on the inner wall of the drive frame (6). When the bent rod (26) contacts the electrically controlled telescopic block (29), the two bent rods (26) will rotate relative to each other and cause the hook (28) to disengage from the locking block (25).

3. The composite film peel strength testing device according to claim 2, characterized in that: The electrically controlled telescopic blocks (29) are provided in multiple ways and are linearly distributed on the inner wall of the drive frame (6). The tension sensor (9) is connected to the multiple electrically controlled telescopic blocks (29) by a controller (31) via an electrical signal. The controller (31) is used to control the extension position of the electrically controlled telescopic blocks (29).

4. The composite film peel strength testing device according to claim 1, characterized in that: The test platform (1) has two sets of symmetrically designed transmission components on both sides. The transmission components include vertical grooves on the outer wall of the test platform (1) and vertically adjustable lifting sliders (14) installed in the vertical grooves. A horizontal shaft (15) is rotatably installed through the lifting slider (14). A gear (16) is fixed on the outer wall of the horizontal shaft (15). A rack (17) that meshes with the gear (16) is fixed at the bottom of the pulling slide (3). The horizontal shaft (15) on the same side is connected to the clamping shaft (12) by a transmission belt assembly.

5. The composite film peel strength testing device according to claim 1, characterized in that: The clamp (4) includes a rotating cylinder (19) rotatably mounted on the side wall of the pull slide (3). The interior of the rotating cylinder (19) is set as a hollow cavity, and two clamping plates (20) are slidably mounted in the hollow cavity. The side wall of the clamping plate (20) is provided with a long groove (24). The side wall of the rotating cylinder (19) is provided with two arc grooves (23), and a locking ring (21) is rotatably mounted on the side wall. The outer wall of the locking ring (21) is fixed with two pins (22) that pass through the arc grooves (23) and are slidably mounted in the long grooves (24). The outer wall of the locking ring (21) is provided with a bolt for locking the locking ring (21) and the rotating shaft of the rotating cylinder (19).

6. The composite film peel strength testing device according to claim 5, characterized in that: The clamping surfaces of the two clamping plates (20) are parallel to and in contact with the plane of the separation section of the composite membrane (30).

7. The composite film peel strength testing device according to claim 6, characterized in that: Guide rods are fixed on the outer walls of the two clamping plates (20) on opposite sides, and guide holes that cooperate with the guide rods are opened on the outer wall of the rotating cylinder (19).

8. The composite film peel strength testing device according to any one of claims 1-7, characterized in that: Both of the aforementioned pull-out slide plates (3) are slidably installed between the inner wall of the test platform (1) and the guide rail.

9. The composite film peel strength testing device according to any one of claims 1-7, characterized in that: The middle part of the test platform (1) is set as a transparent observation window.

Images