A device for testing aging performance and a testing method for polyurethane film

Abstract

The present invention relates to the technical field of film detection equipment, and specifically to an aging performance test equipment and a test method for polyurethane film, wherein the aging performance test equipment comprises: a supporting member, on which two groups of fixed beams are symmetrically arranged, a plurality of groups of supporting plates are equidistantly slidably arranged between the two groups of fixed beams, and a trigger member is arranged between two adjacent groups of supporting plates; a stretching assembly and a clamping assembly are also arranged on the supporting member; the stretching assembly comprises two groups of first longitudinal rods symmetrically arranged along the length direction of the supporting member, and the trigger member is slidably arranged on the first longitudinal rod; the clamping assembly comprises two groups of second longitudinal rods symmetrically arranged along the length direction of the supporting member, and a clamping structure slidably connected to the supporting plate is arranged between the two groups of second longitudinal rods; a driving member is arranged on the supporting member, and can successively drive the second longitudinal rod and the first longitudinal rod to move toward the supporting plate, thereby first driving the clamping structure to move toward the supporting plate, and then driving the supporting plate to diffuse equidistantly.

Description

Technical Field

[0001] The invention relates to the technical field of film detection equipment, in particular to an aging performance test device and a test method for a polyurethane film. Background Art

[0002] As the application fields of polymer films become increasingly wide, the performance requirements for film materials will become higher and higher. Commonly used polyolefin films can no longer meet market demand. In this case, polyurethane films came into being.

[0003] Polyurethane is a polymer material. During long-term use or storage, it will be affected by factors such as the environment and oxidation, resulting in a decrease in physical properties or failure. Therefore, in order to ensure that the film maintains its performance and durability during long-term use, it is necessary to conduct aging performance testing on the film, and then ensure that the film product will not show obvious degradation or deterioration during storage, transportation and handling. After aging the samples under simulated environmental conditions, physical performance tests are then conducted on the aged samples, such as hardness test, tensile strength test, wear resistance test, etc.

[0004] When using a traditional film tensile testing machine, you need to first adjust the two sets of clamps on the testing machine to fix the sample on the testing machine, and then start the testing machine to control the two sets of clamps to move away from each other to perform a tensile test on the film. During the entire test process, the film can be subjected to a full-section tensile test. This test method is relatively simple and is suitable for some simpler film tests. However, for some high-demand films, this simple full-section tensile test cannot accurately feedback the strength performance of the film, which will lead to an erroneous judgment of the overall performance of the film, ultimately affecting the safety and reliability of the film's use. Summary of the invention

[0005] The object of the present invention is to provide an aging performance testing device and a testing method for polyurethane film to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An aging performance test device comprises: a supporting member, on which two groups of fixed beams are symmetrically arranged, a plurality of supporting plates are equidistantly slidably arranged between the two groups of fixed beams, and a triggering member is arranged between two adjacent groups of supporting plates;

[0008] The supporting member is also provided with a stretching component and a clamping component;

[0009] The stretching assembly comprises two groups of first longitudinal rods symmetrically arranged along the length direction of the supporting member, and the trigger member is slidably arranged on the first longitudinal rods;

[0010] The clamping assembly comprises two groups of second longitudinal rods symmetrically arranged along the length direction of the supporting member, and a clamping structure slidably connected to the supporting plate is arranged between the two groups of second longitudinal rods;

[0011] The driving member is arranged on the supporting member, and can successively drive the second longitudinal rod and the first longitudinal rod to move toward the supporting plate, thereby firstly driving the clamping structure to move toward the supporting plate, and then driving the supporting plate to diffuse equidistantly.

[0012] The equipment for aging performance testing as described above: the driving member includes a driving rod rotatably mounted on the supporting member, and the driving rod is symmetrically arranged in two groups along the length direction of the supporting member, and the two groups of driving rods are connected by a belt.

[0013] The equipment for aging performance testing as described above: the stretching assembly includes a rotating cylinder sleeved on the driving rod, the rotating cylinder is sleeved with a first sleeve ring, the first sleeve ring is fixed to the first longitudinal rod, and a first protrusion is formed on the inner wall of the first sleeve ring, and the first protrusion is slidably arranged in a first spiral groove opened on the outer wall of the rotating cylinder.

[0014] The equipment for aging performance testing as described above: the trigger member includes an active sleeve, the active sleeve is slidably arranged on a moving beam, and the moving beam is symmetrically arranged in two groups along the length direction of the supporting member, each group of the moving beams is provided with an active sleeve, and the active sleeve is connected to the two adjacent groups of the supporting plates through two groups of hinged rods.

[0015] The equipment for aging performance testing as described above: a second sleeve ring is fixedly provided at one end of the second longitudinal rod facing the driving rod, the second sleeve ring is sleeved on the driving rod, and a second protrusion is formed on the inner wall of the second sleeve ring, and the second protrusion is slidably provided in an engaging groove body opened on the outer wall of the driving rod.

[0016] The equipment for aging performance testing as described above: the clamping structure includes a clamping plate slidably connected to the supporting plate, the clamping plates at the head and tail ends are slidably connected to the second longitudinal rod, and the other two adjacent groups of clamping plates are connected by a telescopic structure, and an unlocking component is provided on any one group of the clamping plates.

[0017] The equipment for aging performance testing as described above: the unlocking component includes a rotating structure and a bidirectional movable structure, the rotating structure includes a longitudinal member fixedly arranged on the supporting member, a fixed sleeve is arranged on the longitudinal member, a spring is slidably arranged in the fixed sleeve, one end of the spring abuts against the bottom of the fixed sleeve, and the other end abuts against a rotating rod inserted in the fixed sleeve, and a protrusion is fixedly arranged on the inner wall of the fixed sleeve, and the protrusion is slidably arranged in a composite groove opened on the outer wall of the rotating rod.

[0018] The equipment for aging performance testing as described above: the bidirectional movable structure includes clamping rings, and the clamping rings are symmetrically arranged in two groups along the length direction of the clamping plate. Both groups of clamping rings are provided with cross bars, and the cross bars cooperate with the lifting parts arranged on the rotating rod.

[0019] The equipment for aging performance testing as described above: the lifting member includes a rotating ring rotatably mounted on the rotating rod, a guide plate is fixedly provided on the rotating ring, two groups of guide plates are equidistantly provided along the circumferential direction of the rotating ring, and each group of guide plates is provided with an inclined groove and a yield groove.

[0020] A test method for polyurethane film is also proposed, using the aging performance test equipment as described above, comprising the following steps: Step 1: In the initial state, the clamping ring is separated from the second longitudinal rod. When in use, the film is placed on the support plate, and then the rotating rod is pressed downward, and then released after rotating the moving angle. In this process, the lifting member will eventually drive the guide plate to rise a certain distance, so that the two sets of clamping rings are connected to the two sets of second longitudinal rods;

[0021] Step 2: driving the driving rod to rotate synchronously. When the driving rod rotates, the second longitudinal rod will first move toward the supporting plate, so that the clamping plate fixes the film on the supporting plate, and then maintains a stable state;

[0022] Step 3: After the film is fixed, the continuously rotating driving rod will drive the rotating cylinder to rotate, so that the first longitudinal rod drives the moving beam to move toward the supporting plate. At this time, under the connection of the fixed-length hinged rod, the rising active sleeve will force the supporting plates to move away from each other, thereby performing a stretch test on the film.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The polyurethane film can be clamped in sections by cooperating between the support plates and the clamping components which are equidistantly arranged on the support member;

[0025] At the same time, by setting the driving member and the stretching assembly, when the motor is in motion, the driving rod can first drive the clamping assembly to move, so that the second longitudinal rod moves toward the supporting plate, and then the clamping plate and the supporting plate cooperate with each other to fix and clamp the polyurethane film placed on the supporting plate;

[0026] In particular, the clamping plate between the first and last sets of clamping plates is connected to the second longitudinal rod through an unlocking assembly. By adjusting the unlocking assembly, the connection state between the clamping plate between the first and last sets of clamping plates and the second longitudinal rod can be changed, so that the film can be stretched in the whole section or in sections according to the use conditions of the polyurethane film to be tested. With the cooperation of the unlocking assembly, the device can have the effects of both the whole section stretching and the section stretching.

[0027] After the polyurethane film is clamped and fixed, the continuously rotating driving rod will drive the stretching assembly to move the first longitudinal rod toward the support plate, thereby forcing multiple groups of support plates to diffuse equidistantly. During the diffusion process, the clamping plate and the support plate always maintain a clamping state. Therefore, the support plate that diffuses equidistantly can stretch the polyurethane film in sections, and this stretching can be used to test the tensile strength of the aged polyurethane film. Compared with the traditional film tensile testing machine, the present invention has higher clamping stability for the film, and the process of equidistant diffusion using multiple groups of support plates can stretch the film in sections, thereby accurately and detailedly testing the tensile strength of the film, and then it can be detected whether the sampled film meets the uniform thickness requirement during production. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the structure of the equipment for aging performance test.

[0029] Figure 2 Schematic diagram of the structure of the inner side guard plate of the equipment for aging performance testing.

[0030] Figure 3 Schematic diagram of the structure of the other side of the equipment for aging performance test.

[0031] Figure 4 This is a schematic diagram of the structure of the cooperation between the stretching component and the clamping component in the equipment for aging performance testing.

[0032] Figure 5 This is a schematic diagram of the structure of the cooperation between the trigger component and the supporting plate in the equipment for aging performance testing.

[0033] Figure 6 This is a schematic diagram of the structure in which a driving member is connected to a first longitudinal rod and a second longitudinal rod in an aging performance test device.

[0034] Figure 7Schematic diagram of the structure of the embedded groove on the driving rod in the equipment for aging performance testing.

[0035] Figure 8 Schematic diagram of the structure of the connection between the driving rod and the rotating sleeve in the equipment for aging performance testing.

[0036] Fig. 9 This is a schematic diagram of the structure of the trigger rod and the arc groove in the equipment for aging performance testing.

[0037] Fig.10 Schematic diagram of the structure of the unlocked components in the equipment for aging performance testing.

[0038] Fig.11 Schematic diagram of the bidirectional moving structure in the equipment for aging performance testing.

[0039] Fig.12 Schematic diagram of the rotating structure in the equipment for aging performance testing.

[0040] Fig.13 Schematic diagram of the structure of the composite tank in the equipment for aging performance testing.

[0041] In the figure: 1, supporting member; 2, side guard plate; 3, supporting plate; 4, longitudinal member; 5, belt; 6, moving beam; 7, first longitudinal rod; 8, active sleeve; 9, fixed beam; 10, passive sleeve; 11, hinged rod; 12, protruding column; 13, driving rod; 1301, second spiral groove; 1302, arc groove; 1303, adapter groove; 14, clamping plate; 1401, clamping groove; 15, plug-in cylinder; 16, plug-in rod; 17, fixed sleeve; 18, spring; 19, second longitudinal rod ; 20. Second sleeve ring; 2001. Second protrusion; 21. First sleeve ring; 2101. First protrusion; 22. Guide rod; 23. Rotating cylinder; 2301. First spiral groove; 2302. Trigger rod; 24. Clamping ring; 2401. Clamping rod; 2402. Cross bar; 25. Guide plate; 2501. Oblique groove; 2502. Give way groove; 26. Rotating ring; 27. Rotating rod; 2701. First vertical groove; 2702. Second vertical groove; 2703. Rotating groove. DETAILED DESCRIPTION

[0042] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0043] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0044] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0045] See also Figure 1-Figure 13 In an embodiment of the present invention, a device for testing aging performance includes:

[0046] A supporting member 1, wherein two groups of fixed beams 9 are symmetrically arranged on the supporting member 1, and multiple groups of supporting plates 3 are equidistantly slidably arranged between the two groups of fixed beams 9, and a trigger member is arranged between two adjacent groups of supporting plates 3;

[0047] For details, please refer to Figure 1 The supporting member 1 is provided with side guard plates 2, and two groups of the side guard plates 2 are symmetrically arranged along the length direction of the supporting member 1. The two groups of the side guard plates 2 can protect the tensile components arranged on the supporting member 1 to prevent the influence of external touch on the subsequent tensile test.

[0048] The trigger member includes an active sleeve 8, which is slidably arranged on a moving beam 6, and two groups of moving beams 6 are symmetrically arranged along the length direction of the supporting member 1, and each group of moving beams 6 is provided with an active sleeve 8, and the active sleeve 8 is connected to two adjacent groups of the supporting plates 3 through two groups of hinged rods 11;

[0049] Preferably, see Figure 2 , Figure 3 , Figure 4 , Figure 5 The above-mentioned supporting plates 3 are arranged in four groups at equal intervals, and each group of supporting plates 3 is fixedly provided with passive sleeves 10 on both sides. The two groups of passive sleeves 10 are respectively slidably arranged on the two groups of fixed beams 9. Correspondingly, the above-mentioned active sleeves 8 are arranged in three groups at equal intervals along the length direction of the movable beam 6. The three groups of active sleeves 8 are distributed in the intervals formed by the four groups of passive sleeves 10, and each group of active sleeves 8 is connected to the two groups of passive sleeves 10 through a hinge rod 11 (such as Figure 5 shown);

[0050] When the moving beam 6 drives the active sleeve 8 to move toward the supporting plate 3, the fixed-length hinged rod 11 will push the two adjacent groups of passive sleeves 10 away from each other with the cooperation of the active sleeve 8, so that the four groups of supporting plates 3 are evenly diffused.

[0051] The support member 1 is also provided with a stretching component and a clamping component;

[0052] The stretching assembly comprises two groups of first longitudinal rods 7 symmetrically arranged along the length direction of the supporting member 1, and the trigger member is slidably arranged on the first longitudinal rods 7;

[0053] The clamping assembly includes two groups of second longitudinal rods 19 symmetrically arranged along the length direction of the supporting member 1, and a clamping structure slidably connected to the supporting plate 3 is arranged between the two groups of second longitudinal rods 19;

[0054] A driving member, disposed on the supporting member 1, capable of successively driving the second longitudinal rod 19 and the first longitudinal rod 7 toward the supporting plate 3, thereby firstly driving the clamping structure toward the supporting plate 3, and then driving the supporting plate 3 to diffuse equidistantly;

[0055] Specifically, the support plate 3 is used to place the polyurethane film. Polyurethane is a polymer material. During long-term use or storage, it will be affected by factors such as environment and oxidation, resulting in degradation or failure of physical properties. In order to detect the aging degree of polyurethane, an aging test is required. Currently, commonly used polyurethane aging test methods include heating aging method, ultraviolet radiation aging method and oxygen atmosphere aging method.

[0056] When conducting an aging experiment on a polyurethane film, first select a sample that meets the requirements from the samples and prepare the sample according to the test requirements; after the sample selection is completed, select the corresponding aging method and conduct the aging test according to the specified parameters such as temperature, time or light intensity; conduct physical property tests on the aged sample, such as hardness test, tensile strength test, wear resistance test, etc. In an embodiment of the present invention, by utilizing the cooperation between the tensile component and the clamping component and the driving member, the tensile strength test can be conducted on the aged sample.

[0057] In detail, the driving member includes a driving rod 13 rotatably mounted on the supporting member 1, and two groups of the driving rods 13 are symmetrically arranged along the length direction of the supporting member 1, and the two groups of the driving rods 13 are connected by a belt 5;

[0058] For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 Any one of the above-mentioned drive rods 13 is coaxially fixedly connected to the output shaft of the motor fixedly mounted on the supporting member 1. Through the driving motor, under the connecting action of the belt 5, the two sets of drive rods 13 will rotate synchronously, thereby driving the clamping assembly and the stretching assembly to move successively, which can more quickly and conveniently clamp the polyurethane film placed on the supporting plate 3 and perform strength stretching test experiments.

[0059] For further information, see Figure 6 , Figure 7, Figure 8 , Fig. 9 The stretching assembly includes a rotating cylinder 23 sleeved on the driving rod 13, a first sleeve ring 21 is sleeved on the rotating cylinder 23, the first sleeve ring 21 is fixed to the first longitudinal rod 7, and a first protrusion 2101 is formed on the inner wall of the first sleeve ring 21, and the first protrusion 2101 is slidably arranged in a first spiral groove 2301 opened on the outer wall of the rotating cylinder 23;

[0060] Preferably, see Figure 6 , Figure 8 , Fig. 9 The rotating cylinder 23 is rotatably mounted on the supporting member 1, and a guide rod 22 is fixedly provided on the supporting member 1. The guide rod 22 is symmetrically provided in two groups along the length direction of the supporting member 1. The first sleeve ring 21 is slidably connected to the guide rod 22. Under the restriction of the guide rod 22, the first longitudinal rod 7 can only slide along the width direction of the supporting member 1.

[0061] In particular, see Figure 8 , Fig. 9 A trigger rod 2302 is formed on the inner wall of the rotating cylinder 23. The trigger rod 2302 is arranged in the adapting groove 1303 provided on the outer wall of the driving rod 13. In the embodiment of the present invention, the arc center angle corresponding to the adapting groove 1303 is 180°. In the initial state, the trigger rod 2302 is in contact with one set of groove walls of the adapting groove 1303 (such as Fig. 9 As shown in the figure, the first sleeve ring 21 is close to the belt 5. At this time, the first protrusion 2101 is located at the end of the first spiral groove 2301 close to the belt 5. When the driving rod 13 is driven by the motor to continuously rotate counterclockwise to 180°, the rotating cylinder 23 will maintain the initial position unchanged until the driving rod 13 rotates to 180°, and the other end of the adapting groove 1303 fits with the trigger rod 2302. Then, the driving rod 13 that continues to rotate will drive the rotating cylinder 23 to rotate counterclockwise synchronously;

[0062] Then, the contact and compression of the first spiral groove 2301 wall on the first protrusion 2101 will force the first longitudinal rod 7 to drive the movable beam 6 to move toward the support plate 3 along the axial direction of the guide rod 22, and then drive the support plate 3 to diffuse equidistantly. At this time, the diffusing support plate 3 will perform segmented stretching testing on the polyurethane film with the cooperation of the clamping assembly.

[0063] A second sleeve ring 20 is fixedly provided at one end of the second longitudinal rod 19 facing the driving rod 13. The second sleeve ring 20 is sleeved on the driving rod 13, and a second protrusion 2001 is formed on the inner wall of the second sleeve ring 20. The second protrusion 2001 is slidably provided in an engaging groove body provided on the outer wall of the driving rod 13.

[0064] For details, please refer to Figure 6 , Figure 7 , Figure 8 The above-mentioned interlocking groove body includes a second spiral groove 1301 and an arc groove 1302. In combination with the above, the second spiral groove 1301 and the arc groove 1302 are provided with a half circle along the outer wall of the driving rod 13, which just corresponds to the adaption groove 1303, and the second sleeve ring 20 is slidably connected with the guide rod 22, so that the second longitudinal rod 19 can also only slide along the width direction of the supporting member 1;

[0065] Specifically, in the initial state, the second sleeve ring 20 is away from the belt 5, and the second protrusion 2001 is located at the end of the second spiral groove 1301. In combination with the above, when the motor drives the driving rod 13 to rotate counterclockwise (combined with Figure 8 ), the contact and compression of the second protrusion 2001 by the groove wall of the second spiral groove 1301 will force the second sleeve ring 20 to drive the second longitudinal rod 19 to move toward the supporting plate 3. During this process, the driving rod 13 will rotate relative to the rotating cylinder 23 until the driving rod 13 rotates 180°, and the second protrusion 2001 moves to combine with the arc groove 1302, and the other end of the adapter groove 1303 fits with the trigger rod 2302. At this time, the clamping structure arranged on the second longitudinal rod 19 fixes the film on the supporting plate 3; then The continued rotation of the driving rod 13 will drive the rotating cylinder 23 to rotate counterclockwise, so that the first sleeve ring 21 drives the first longitudinal rod 7 to approach the supporting plate 3. During this process, the first protrusion 2101 will slide in the arc groove 1302 to ensure that the clamping structure can always stably clamp the film. As the first longitudinal rod 7 moves toward the supporting plate 3, the active sleeve 8 will, with the cooperation of the hinged rod 11, drive the supporting plates 3 to diffuse equidistantly, and the diffused supporting plates 3 can perform tensile tests on the film.

[0066] The clamping structure includes a clamping plate 14 slidably connected to the supporting plate 3, the clamping plates 14 at the first and second ends are slidably connected to the second longitudinal rod 19, and the remaining two adjacent groups of the clamping plates 14 are connected by a telescopic structure, and an unlocking component is provided on any group of the clamping plates 14;

[0067] The unlocking assembly includes a rotating structure and a bidirectional moving structure, the rotating structure includes a longitudinal member 4 fixedly arranged on the supporting member 1, a fixed sleeve 17 is arranged on the longitudinal member 4, a spring 18 is slidably arranged in the fixed sleeve 17, one end of the spring 18 abuts against the bottom of the fixed sleeve 17, and the other end abuts against a rotating rod 27 inserted in the fixed sleeve 17, and a protruding column 12 is fixedly arranged on the inner wall of the fixed sleeve 17, and the protruding column 12 is slidably arranged in a composite groove opened on the outer wall of the rotating rod 27;

[0068] For details, please refer to Fig.12 , Fig.13 The composite groove includes a first vertical groove 2701, a second vertical groove 2702 and a rotating groove 2703. Fig.12 As shown, the length of the first vertical groove 2701 is much greater than that of the second vertical groove 2702;

[0069] In particular, the spring 18 is always in a compressed state, and the spring 18 in the compressed state pushes the rotating rod 27 to always have a tendency to move away from the longitudinal member 4. In the initial state, the protruding column 12 is located at the end of the stroke of the first vertical groove 2701. Due to the influence of the reserved elastic potential energy of the spring 18, the position of the rotating rod 27 is fixed at this time.

[0070] The bidirectional moving structure includes a clamping ring 24, and two groups of the clamping ring 24 are symmetrically arranged along the length direction of the clamping plate 14. Both groups of the clamping rings 24 are provided with a cross bar 2402, and the cross bar 2402 cooperates with a lifting member arranged on the rotating rod 27;

[0071] For details, please refer to Fig.11 , Fig.12 The clamping ring 24 is fixedly provided with a clamping rod 2401, and the clamping rod 2401 is slidably arranged in a clamping groove 1401 provided on the clamping plate 14. With the cooperation of the clamping rod 2401 and the clamping groove 1401, the clamping ring 24 can only slide along the length direction of the clamping plate 14;

[0072] In particular, the telescopic structure is located between two adjacent groups of clamping plates 14, including a plug-in tube 15 and a plug-in rod 16. Fig.10 As shown, the plug-in cylinder 15 is fixedly connected to one group of clamping rings 24, the plug-in rod 16 is fixedly connected to the other group of clamping rings 24, and the plug-in rod 16 is inserted in the plug-in cylinder 15. Under the cooperation between the plug-in rod 16 and the plug-in cylinder 15, the clamping rings 24 on the first and last groups of supporting plates 3 can be synchronized, and then the clamping plates 14 between the first and last groups of supporting plates 3 can be synchronized to clamp or release the film;

[0073] The lifting member comprises a rotating ring 26 rotatably mounted on the rotating rod 27, and a guide plate 25 is fixedly arranged on the rotating ring 26. The guide plates 25 are arranged in two groups equidistantly along the circumferential direction of the rotating ring 26, and each group of the guide plates 25 is provided with an inclined groove 2501 and a clearance groove 2502;

[0074] For details, please refer to Fig.10 , Fig.12In the initial state, the cross bar 2402 is located at the end of the travel of the give way groove 2502, the protruding column 12 is combined with the end of the travel of the second vertical groove 2702, and the clamping ring 24 is separated from the second longitudinal rod 19. At this time, the driving motor and the rotating driving rod 13 can only drive the first and last sets of clamping plates 14 to cooperate with the supporting plate 3, so as to clamp the first and last ends of the film, and then stretch the film to detect the tensile strength of the film after aging; so far, the actual effect of the present invention is the same as the use effect of the traditional film tensile testing machine, which can only perform a whole-section tensile test on the film. This detection method is relatively simple, but for some polyurethane films with higher requirements, this whole-section tensile detection method is not accurate enough for film performance detection, and it is impossible to detect the performance of the film after aging section by section, which will lead to inaccurate detection results;

[0075] However, in the embodiment of the present invention, when a more detailed tensile strength test of the polyurethane film is required, before use, the rotating rod 27 is first pressed toward the supporting plate 3 to disengage the protruding column 12 from the second vertical groove 2702. During this process, the cross bar 2402 is separated from the clearance groove 2502 and combined with the inclined groove 2501, and then the rotating rod 27 is rotated counterclockwise (combined with Fig.12 ), at this time, the protruding column 12 will slide in the rotating groove 2703 until the rotating rod 27 cannot rotate, and then the rotating rod 27 is released. Then, the rotating rod 27 will quickly move away from the supporting plate 3 under the action of the elastic potential energy released by the spring 18. At this time, the protruding column 12 will slide in the first vertical groove 2701. During this process, the guide plate 25 will rise with the rotating rod 27. During the rising process, the wall of the inclined groove 2501 squeezes the cross bar 2402, forcing the two groups of clamping rings 24 to move away from each other. Until the protruding column 12 is combined with the stroke end of the first vertical groove 2701, the rotating rod 27 The position is fixed, and the clamping ring 24 is engaged and connected with the second longitudinal rod 19. At this time, the clamping plate 14 located in the middle section is connected with the second longitudinal rod 19. In this case, the motor is driven, and the multiple groups of clamping plates 14 on the second longitudinal rod 19 can move at the same time, so as to clamp the polyurethane film in sections. Then, when the first longitudinal rod 7 moves, the multiple groups of supporting plates 3 perform equidistant diffusion movements, so as to stretch the film in sections, thereby accurately and detailedly testing the tensile strength of the film, so as to detect whether the sampled film has met the uniform thickness requirement during production.

[0076] A test method for polyurethane film is also proposed, using the aging performance test equipment as described above, including the following steps: Step 1: In the initial state, the clamping ring 24 is separated from the second longitudinal rod 19. When in use, the film is placed on the supporting plate 3, and then the rotating rod 27 is pressed downward, and then released after rotating the moving angle. In this process, the lifting member will eventually drive the guide plate 25 to rise a certain distance, so that the two groups of clamping rings 24 are connected to the two groups of second longitudinal rods 19;

[0077] Step 2: driving the driving rod 13 to rotate synchronously. When the driving rod 13 rotates, the second longitudinal rod 19 will first move toward the supporting plate 3, so that the clamping plate 14 fixes the film on the supporting plate 3, and then maintains a stable state;

[0078] Step three: After the film is fixed, the continuously rotating driving rod 13 will drive the rotating cylinder 23 to rotate, so that the first longitudinal rod 7 drives the moving beam 6 to move toward the supporting plate 3. At this time, under the connection of the fixed-length hinged rod 11, the rising active sleeve 8 will force the supporting plates 3 to move away from each other, thereby performing a stretching test on the film.

[0079] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0080] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An aging performance test device, comprising a supporting member, on which two groups of fixed beams are symmetrically arranged, a plurality of supporting plates are equidistantly slidably arranged between the two groups of fixed beams, and a triggering member is arranged between two adjacent groups of supporting plates; characterized in that: The supporting member is also provided with a stretching component and a clamping component; The stretching assembly comprises two groups of first longitudinal rods symmetrically arranged along the length direction of the supporting member, and the trigger member is slidably arranged on the first longitudinal rods; The clamping assembly comprises two groups of second longitudinal rods symmetrically arranged along the length direction of the supporting member, and a clamping structure slidably connected to the supporting plate is arranged between the two groups of second longitudinal rods; A driving member, disposed on the supporting member, capable of successively driving the second longitudinal rod and the first longitudinal rod to move toward the supporting plate, thereby first driving the clamping structure to move toward the supporting plate, and then driving the supporting plate to diffuse equidistantly; The driving member comprises a driving rod rotatably mounted on the supporting member, and the driving rod is symmetrically arranged in two groups along the length direction of the supporting member, and the two groups of driving rods are connected by a belt; The stretching assembly comprises a rotating cylinder sleeved on the driving rod, a first sleeve ring sleeved on the rotating cylinder, the first sleeve ring is fixed to the first longitudinal rod, and a first protrusion is formed on the inner wall of the first sleeve ring, and the first protrusion is slidably arranged in a first spiral groove opened on the outer wall of the rotating cylinder; The trigger member includes an active sleeve, which is slidably arranged on a moving beam. Two groups of moving beams are symmetrically arranged along the length direction of the supporting member. An active sleeve is arranged on each group of moving beams, and the active sleeve is connected to two adjacent groups of supporting plates through two groups of hinged rods.

2. The device for aging performance testing according to claim 1, characterized in that: A second sleeve ring is fixedly provided at one end of the second longitudinal rod facing the driving rod. The second sleeve ring is sleeved on the driving rod, and a second protrusion is formed on the inner wall of the second sleeve ring. The second protrusion is slidably provided in an engaging groove body opened on the outer wall of the driving rod.

3. The device for aging performance testing according to claim 1, characterized in that: The clamping structure includes a clamping plate slidably connected to the supporting plate, the clamping plates at the first and second ends are slidably connected to the second longitudinal rod, and the other two adjacent groups of clamping plates are connected by a telescopic structure, and an unlocking component is provided on any one group of the clamping plates.

4. The device for aging performance testing according to claim 3, characterized in that: The unlocking assembly includes a rotating structure and a bidirectional movable structure, the rotating structure includes a longitudinal member fixedly arranged on the supporting member, a fixed sleeve is arranged on the longitudinal member, a spring is slidably arranged in the fixed sleeve, one end of the spring abuts against the bottom of the fixed sleeve, and the other end abuts against a rotating rod inserted in the fixed sleeve, and a protrusion is fixedly arranged on the inner wall of the fixed sleeve, and the protrusion is slidably arranged in a composite groove opened on the outer wall of the rotating rod.

5. The device for aging performance testing according to claim 4, characterized in that: The bidirectional moving structure comprises a clamping ring, and two groups of the clamping rings are symmetrically arranged along the length direction of the clamping plate. Both groups of the clamping rings are provided with a cross bar, and the cross bar cooperates with a lifting member arranged on the rotating rod.

6. The device for testing aging performance according to claim 5, characterized in that: The lifting member comprises a rotating ring rotatably mounted on the rotating rod, a guide plate is fixedly arranged on the rotating ring, two groups of guide plates are equidistantly arranged along the circumferential direction of the rotating ring, and each group of guide plates is provided with an inclined groove and a yield groove.

7. A method for testing polyurethane film, using the aging performance testing device as described in claim 6, characterized in that: The steps include: Step 1: In the initial state, the clamping ring is separated from the second longitudinal rod. When in use, the film is placed on the supporting plate, and then the rotating rod is pressed down, and then released after rotating the moving angle. During this process, the lifting member will eventually drive the guide plate to rise a certain distance, so that the two sets of clamping rings are connected to the two sets of second longitudinal rods; Step 2: driving the driving rod to rotate synchronously. When the driving rod rotates, the second longitudinal rod will first move toward the supporting plate, so that the clamping plate fixes the film on the supporting plate, and then maintains a stable state; Step 3: After the film is fixed, the continuously rotating driving rod will drive the rotating cylinder to rotate, so that the first longitudinal rod drives the moving beam to move toward the supporting plate. At this time, under the connection of the fixed-length hinged rod, the rising active sleeve will force the supporting plates to move away from each other, thereby performing a stretch test on the film.

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