Tension testing device for thermoplastic elastomer for PA encapsulation

Abstract

The invention relates to the technical field of tension testing, in particular to a PA rubber coating thermoplastic elastomer tension testing device which comprises a testing table, a tension testing machine is arranged on the testing table, a testing seat used for pulling a sample to move towards the two sides is arranged on the tension testing machine, a supporting frame is fixedly connected to the top end of the testing table, and a top groove is formed in the top end of the supporting frame. Through the arrangement of the sample cutting mold, the cylinder, the moving mechanism, the winding mechanism and other structures, a thermoplastic elastomer sample can be automatically cut, the cut part is taken away and placed on a test seat of a tensile test machine, and then a test block is clamped for a tensile test; therefore, automatic cutting and feeding of the thermoplastic elastomer samples are achieved, the samples do not need to be cut and placed by testers, the convenience performance of the device is greatly improved, meanwhile, follow-up sample cutting and feeding work can be carried out in the testing process of the previous set of samples, and the testing time is greatly shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of tensile testing, and specifically provides a tensile testing device for thermoplastic elastomers used in PA encapsulation. Background Art

[0002] The thermoplastic elastomer used in PA encapsulation is a special material composed of a base polymer, a tackifier, an oil plasticizer, and functional additives. It combines the strength of PA and the flexibility of thermoplastic elastomers, and has excellent adhesion, flexibility, elasticity, and processing properties. It is widely used in the fields of automobiles, electronic appliances, industry, and consumer goods, such as automotive interior parts, tool handles, mechanical seals, etc. It is easy to process and form, recyclable, has good durability and chemical resistance, and through tests such as tensile strength and hardness, its performance is ensured to meet international and industry standards and meet the requirements of various application scenarios.

[0003] In the prior art, a tensile testing device for thermoplastic elastomers with the publication number CN210690246U can perform good clamping on thermoplastic elastomers by setting a clamping mechanism and an anti-dropping mechanism. The test object is easy to clamp and not easy to fall off, which is convenient for operators to operate and improves the efficiency of tensile testing. In addition, by setting a pointer and a scale, accurate testing of thermoplastic elastomer products can be carried out. The method is simple, easy to operate, and the experimental results are more accurate.

[0004] Although the above device can accurately test thermoplastic elastomer products, there are still some defects in the actual testing process. At present, during the testing process, samples need to be manually cut and then installed on the tensile testing machine. Manual cutting has low efficiency and is easily affected by human factors, resulting in inaccurate dimensions and affecting the testing accuracy. The installation process is also cumbersome. Samples need to be accurately placed and fixed manually, and improper operation may cause the samples to be skewed or unevenly stressed, thereby affecting the reliability of the results. When continuously testing multiple samples, repeated manual operations take a long time, have a high labor intensity, and are inefficient. These problems highlight the deficiencies of existing testing devices in terms of automation and convenience and urgently need to be improved.

[0005] Therefore, a tensile testing device for thermoplastic elastomers used in PA encapsulation is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a tensile testing device for thermoplastic elastomers used in PA encapsulation to solve the problems raised in the above background art.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A tensile test device for a thermoplastic elastomer for PA encapsulation, including a test bench, a tensile testing machine is provided on the test bench, a test seat for pulling the specimen to move to both sides is provided on the tensile testing machine, a support frame is fixedly connected to the top end of the test bench, a top groove is opened at the top end of the support frame, a slider is slidably connected in the top groove, a moving mechanism for driving the slider to move is provided on the support frame, an upper electric telescopic cylinder is fixedly connected to the top end of the slider, the output end of the upper electric telescopic cylinder passes through the bottom end of the slider and is fixedly connected to a fixed frame, cylindrical tubes are fixedly connected to both sides of the bottom of the fixed frame, the bottom end of the cylindrical tube is provided with a spiked shape, a chute is penetrated and opened at the bottom end of the outer wall of the cylindrical tube, a pair of top blocks are horizontally slidably connected inside the chute, a return spring is fixedly connected between the top blocks, a sub-rope is fixedly connected to each side of the top blocks close to each other, a main rope is fixedly connected between the top ends of the sub-ropes, a winding mechanism for winding the main rope is provided on the fixed frame, and a specimen cutting die is provided below the fixed frame.

[0008] In the above technical solution, further, a placement frame is fixedly connected to the top end of the test bench, a thermoplastic elastomer specimen is placed in the placement frame, and three pairs of jacks are equidistantly opened at the inner position of the test bench relative to the placement frame.

[0009] In the above technical solution, further, the winding mechanism includes a driving motor, upper plates are fixedly connected to both sides of the top end of the fixed frame, a winding roller is rotatably connected between the upper plates, the top end of the main rope passes through the fixed frame and is wound around the outer wall of the winding roller, the driving motor is fixedly connected to the side wall of one of the upper plates, and the output end of the driving motor passes through the upper plate and is fixedly connected to the side wall of the winding roller, a pair of upper guide rollers are rotatably connected inside the chute, and the sub-ropes all pass through the side close to each other of the upper guide rollers.

[0010] In the above technical solution, further, lower plates are fixedly connected to the top end of the fixed frame at positions beside the upper plates, lower guide rollers are rotatably connected between the upper plates and the lower plates, and the main ropes all pass through above the lower guide rollers.

[0011] In the above technical solution, further, the moving mechanism includes a moving motor, the moving motor is fixedly connected to the side wall of the support frame, a threaded rod is rotatably connected inside the top groove, the output end of the moving motor passes through the inside of the top groove and is fixedly connected to the side wall of the threaded rod, and the threaded rod is threadedly connected through the inner side wall of the slider.

[0012] In the above technical solution, further, a pair of lower electric telescopic cylinders are fixedly connected to the top end of the fixed frame, a pair of cross plates are fixedly connected to the inner top end of the specimen cutting die, and the output ends of the lower electric telescopic cylinders pass through the bottom end of the fixed frame and are fixedly connected to the top ends of the cross plates.

[0013] In the above technical solution, further, the test seat is set to be L-shaped, a through groove is provided at the top of the test seat, a clamping plate is slidably connected to the inside of the through groove, a movable groove for the sliding of the cylinder is provided through the top of the clamping plate and the inside of the test seat, a clamping electric telescopic cylinder is fixedly connected to the side wall of the test seat, and the output end of the clamping electric telescopic cylinder is fixedly connected to the bottom end of the clamping plate.

[0014] In the above technical solution, further, the top of the tensile testing machine is fixedly connected with an L-shaped fixed plate, the inner side of the fixed plate is provided with a blanking plate, the front side of the fixed plate is fixedly connected with an electric telescopic cylinder for blanking, the output end of the electric telescopic cylinder for blanking passes through the fixed plate and is fixedly connected to the side wall of the blanking plate, the bottom of the fixed plate is flush with the bottom end of the test seat, a pair of collection boxes are provided at the top of the test bench relative to the rear side of the tensile testing machine, and a pair of guide blocks are fixedly connected to the rear side of the top of the tensile testing machine.

[0015] In the above technical solution, further, a main position sensor is fixedly connected to the top of the slider, and three sub-position sensors are fixedly connected to the top of the support frame at equal intervals. The main position sensor and the three sub-position sensors are electrically connected to the moving motor through the controller.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention, through the arrangement of structures such as a sample cutting die, a cylinder, a moving mechanism, and a winding mechanism, can automatically cut a thermoplastic elastomer sample, remove the cut portion and place it on the test seat of the tensile testing machine, and then clamp the test block for tensile testing, thereby realizing automatic cutting and loading of the thermoplastic elastomer sample. There is no need for test personnel to cut and place the sample, which greatly improves the convenience of the device. At the same time, subsequent sample cutting and loading work can be carried out during the testing process of the previous group of samples, greatly shortening the test time.

[0017] 2. The present invention can automatically push out the test block after the test on the test seat through the arrangement of the electric telescopic cylinder, the collection box and the unloading plate, and push it into the collection box at the rear for collection and processing, thereby realizing automatic unloading of the device. There is no need for the tester to remove the test block after the test is completed, further improving the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of the testing device of the present invention; Figure 2 The appended Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 The appended Figure 1 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 4 Rear view three-dimensional structure schematic diagram of the test device of the present invention; Figure 5 Bottom view three-dimensional structure schematic diagram of the fixing frame and the slider of the present invention; Figure 6 Overall appearance structure schematic diagram of the winding mechanism of the present invention; Figure 7 Partial front full-section three-dimensional structure schematic diagram of the cylinder of the present invention; Figure 8 Top view three-dimensional structure schematic diagram of the tensile testing machine of the present invention.

[0019] In the figure: 1, test bench; 2, tensile testing machine; 3, test seat; 4, placement frame; 5, thermoplastic elastomer sample; 6, support frame; 7, slider; 8, upper electric telescopic cylinder; 9, fixing frame; 10, cylinder; 11, jack; 12, top block; 13, sub-rope; 14, main rope; 15, upper plate; 16, winding roller; 17, drive motor; 18, sample cutting die; 19, upper guide roller; 20, lower plate; 21, lower guide roller; 22, moving motor; 23, threaded rod; 24, lower electric telescopic cylinder; 25, cross plate; 26, clamping plate; 27, moving groove; 28, clamping electric telescopic cylinder; 29, fixing plate; 30, blanking plate; 31, collection box; 32, material guiding block; 33, main position sensor; 34, sub-position sensor; 35, return spring; 36, blanking electric telescopic cylinder. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In actual use, it is found that currently, during the test process, the sample needs to be manually cut and then installed on the tensile testing machine 2. Manual cutting has low efficiency and is easily affected by human factors, resulting in inaccurate dimensions and affecting the test accuracy. The installation process is also cumbersome. It is necessary to manually and precisely place and fix the sample. Improper operation may cause the sample to be skewed or unevenly stressed, thereby affecting the result reliability. When continuously testing multiple samples, repeated manual operations take a long time, have a large labor intensity, and are inefficient. These problems highlight the deficiencies of the existing test device in terms of automation and convenience and urgently need to be improved. To solve the above problems, the following structure is specifically invented.

[0022] Please refer to as Figures 1-8A tensile test device for a PA-coated thermoplastic elastomer as shown, including a test bench 1. A tensile testing machine 2 is provided on the test bench 1. A test seat 3 for pulling the specimen to move to both sides is provided on the tensile testing machine 2. The tensile testing machine 2 mainly applies tensile force to the specimen through a motor, a hydraulic system or other driving devices. The driving device gradually increases the tensile force according to a preset rate or program. A tensile force sensor measures the magnitude of the applied tensile force, and a displacement sensor measures the deformation amount of the specimen. These data are collected in real time and transmitted to a data processing system. The data processing system calculates mechanical property indexes such as the tensile strength, yield strength, elongation rate, etc. of the specimen based on the collected data, and generates a tensile force-displacement curve or other charts for users to analyze and evaluate the performance of the specimen; A support frame 6 is fixedly connected to the top end of the test bench 1. A top groove is opened at the top end of the support frame 6. A slider 7 is slidably connected in the top groove. A moving mechanism for driving the slider 7 to move is provided on the support frame 6. An upper electric telescopic cylinder 8 is fixedly connected to the top end of the slider 7. The output end of the upper electric telescopic cylinder 8 passes through the bottom end of the slider 7 and is fixedly connected to a fixing frame 9. Cylinders 10 are fixedly connected to both sides of the bottom of the fixing frame 9. The bottom end of the cylinder 10 is set to be spiked. A chute is penetrated through the bottom wall of the outer wall of the cylinder 10. A pair of top blocks 12 are horizontally slidably connected inside the chute. The sides of the top blocks 12 away from each other are set to be inclined planes. A return spring 35 is fixedly connected between the top blocks 12. Through the setting of the return spring 35, it is convenient to quickly push the two top blocks 12 to reset when the tensile force or extrusion force is released. Main ropes 14 are fixedly connected between the sides of the top blocks 12 close to each other. A winding mechanism for winding the main rope 14 is provided on the fixing frame 9. A specimen cutting die 18 is provided below the fixing frame 9; A placement frame 4 is fixedly connected to the top end of the test bench 1. Through the setting of the placement frame 4, it can play a positioning role in the placement position of the thermoplastic elastomer specimen 5. The thermoplastic elastomer specimen 5 is placed in the placement frame 4. Three pairs of jacks 11 are equidistantly opened at the top end of the test bench 1 relative to the inner side position of the placement frame 4. Through the setting of the jacks 11, it can avoid hindering the cylinder 10 from passing through the thermoplastic elastomer specimen 5 for fixation; The winding mechanism includes a driving motor 17. Upper plates 15 are fixedly connected to both sides of the top end of the fixing frame 9. A winding roller 16 is rotatably connected between the upper plates 15. The top end of the main rope 14 passes through the fixing frame 9 and is wound around the outer wall of the winding roller 16. The driving motor 17 is fixedly connected to the side wall of one of the upper plates 15. The output end of the driving motor 17 passes through the upper plate 15 and is fixedly connected to the side wall of the winding roller 16. A pair of upper guide rollers 19 are rotatably connected inside the chute. The main ropes 14 all pass through the sides of the upper guide rollers 19 close to each other. Through the setting of the upper guide rollers 19, it can play a guiding role in the sliding of the main ropes 14 to ensure that the two top blocks 12 can be accurately pulled towards the middle; The moving mechanism includes a moving motor 22, which is fixedly connected to the side wall of the support frame 6. A threaded rod 23 is rotatably connected to the inner side of the top groove. The output end of the moving motor 22 passes through the inner side of the top groove and is fixedly connected to the side wall of the threaded rod 23. The threaded rod 23 is threadedly connected through the inner side wall of the slider 7; A pair of lower electric telescopic cylinders 24 are fixedly connected to the top end of the fixed frame 9. A pair of cross plates 25 are fixedly connected to the inner top end of the specimen cutting die 18. The output end of the lower electric telescopic cylinder 24 passes through the bottom end of the fixed frame 9 and is fixedly connected to the top end of the cross plate 25; The test seat 3 is arranged in an L shape. A through groove is formed in the top end of the test seat 3. A clamping plate 26 is slidably connected to the inner side of the through groove. Moving grooves 27 for the sliding of the cylinder 10 are formed through the top end of the clamping plate 26 and the inner side of the test seat 3. Here, it should be noted that the size of the moving groove 27 is larger than the size of the top block 12 protruding, to avoid hindering the movement of the top block 12. A clamping electric telescopic cylinder 28 is fixedly connected to the side wall of the test seat 3. The output end of the clamping electric telescopic cylinder 28 is fixedly connected to the bottom end of the clamping plate 26; When performing a tensile test on the thermoplastic elastomer specimen 5, first place the thermoplastic elastomer specimen 5 in the placement frame 4, and then control the upper electric telescopic cylinder 8 to start and drive the fixed frame 9 to move downward, and at the same time drive the cylinder 10 to move downward. Then, pierce the thermoplastic elastomer specimen 5 through the tip at the bottom end of the cylinder 10 and insert it into the corresponding jack 11. During this process, when the top block 12 moves to the surface of the thermoplastic elastomer specimen 5, since the thermoplastic elastomer specimen 5 can slide in the chute, under the action of the thermoplastic elastomer specimen 5 piercing and squeezing the inclined surface of the top block 12, the top block 12 will be gradually pushed to move towards the middle in the chute and gradually compress the return spring 35. Then, when the top block 12 passes through the bottom end of the thermoplastic elastomer specimen 5, the extrusion on the top block 12 will be released, and then the top block 12 will be pushed to slide and reset to both sides under the elastic force of the return spring 35, so that the top end of the top block 12 is in contact with the bottom end of the thermoplastic elastomer specimen 5, which is convenient for extracting the cut specimen later; Then, the lower electric telescopic cylinder 24 can be controlled to start, driving the specimen cutting die 18 to move downward to cut the thermoplastic elastomer specimen 5 according to the requirements of the tensile test installation. Subsequently, after the cutting is completed, the lower electric telescopic cylinder 24 is controlled to reset and drive the specimen cutting die 18 to retract. Then, the upper electric telescopic cylinder 8 can be controlled to start, driving the fixing frame 9 and the cylinder 10 to move upward. Since the cylinder 10 is inserted into the cut part of the thermoplastic elastomer specimen 5 at this time, and the top block 12 is stuck at the bottom end of the cut part of the specimen, when the cylinder 10 moves upward, it will drive the cut specimen to move upward simultaneously (the specimen can be moved upward to the inner bottom end of the test seat 3). Subsequently, the moving motor 22 can be controlled to start, driving the threaded rod 23 to rotate, and then driving the slid block 7 connected by the thread to move, simultaneously driving the upper electric telescopic cylinder 8, the fixing frame 9, the cylinder 10 and the specimen to move. Then, the cylinder 10 penetrates into the moving grooves 27 on the clamping plate 26 and the test seat 3, and at the same time, the specimen penetrates between the clamping plate 26 and the test seat 3; The driving motor 17 can be controlled to start, driving the winding roller 16 to rotate, thereby winding the main rope 14, pulling the main rope 14 up, and at the same time driving the sub-rope 13 to move upward. Then, under the guiding of the upper guide roller 19, the sub-rope 13 pulls the top block 12 to move towards the middle, thereby pulling the top block 12 into the chute, and at the same time compressing the return spring 35. Subsequently, the clamping electric telescopic cylinder 28 can be controlled to start, driving the clamping plate 26 to move downward to clamp the specimen between the clamping plate 26 and the test seat 3. Finally, the upper electric telescopic cylinder 8 is controlled to start, driving the fixing frame 9 and the cylinder 10 to move upward. Since the specimen is clamped by the clamping plate 26 and the test seat 3 at this time, the cylinder 10 can be directly pulled out from the specimen. Then, the moving motor 22 is controlled to start reversing to move the fixing frame 9 away, and the above operations are repeated in reverse to continue cutting the specimens on the thermoplastic elastomer specimen 5. During this process, the tensile testing machine 2 can be controlled to start to perform tensile testing on the specimens. Repeating this way, the automatic cutting, feeding and testing of the thermoplastic elastomer specimen 5 can be realized.

[0023] In order to improve the smoothness during the operation of the device, lower plates 20 are fixedly connected to the positions beside the upper plate 15 at the top of the fixing frame 9. Lower guide rollers 21 are rotatably connected between the upper plate 15 and the lower plates 20. The main ropes 14 all pass above the lower guide rollers 21. Through the settings of the lower plates 20 and the lower guide rollers 21, the sliding direction of the main ropes 14 can be guided, avoiding the contact and friction between the main ropes 14 and the top of the fixing frame 9, and improving the service life of the main ropes 14 and the smoothness during the operation.

[0024] In summary, through the design of the above structure, the thermoplastic elastomer specimen 5 can be automatically sliced, and the cut-off part can be taken away and placed on the test seat 3 of the tensile testing machine 2. Subsequently, the test block is clamped for tensile testing, so as to realize the automatic slicing and feeding of the thermoplastic elastomer specimen 5. There is no need for the tester to slice and place the specimen, which greatly improves the convenience of the device. At the same time, the subsequent specimen slicing and feeding work can be carried out during the testing process of the previous group of specimens, greatly shortening the testing time.

[0025] On the basis of the above embodiment, it is found during use that although the test block can be automatically sliced and placed on the test seat 3 for automatic testing, the test block after testing cannot be automatically taken out and needs to be taken out manually, which is rather troublesome. To solve the above problems, the above structure is further improved.

[0026] L-shaped fixing plates 29 are fixedly connected to the top ends of the tensile testing machines 2. A blanking plate 30 is arranged inside the fixing plates 29. Blanking electric telescopic cylinders 36 are fixedly connected to the front sides of the fixing plates 29. The output ends of the blanking electric telescopic cylinders 36 pass through the fixing plates 29 and are fixedly connected to the side walls of the blanking plate 30. The bottoms of the fixing plates 29 are flush with the inner bottom ends of the test seats 3. A pair of collection boxes 31 are arranged at the top end of the test bench 1 relative to the rear side position of the tensile testing machines 2. A pair of guide blocks 32 are fixedly connected to the rear side position of the top ends of the tensile testing machines 2; After the test block on the tensile testing machine 2 is broken and the test is completed, the test seat 3 on the tensile testing machine 2 can be controlled to move beside the fixing plate 29. First, the clamping electric telescopic cylinder 28 is controlled to start to drive the clamping plate 26 to move upward to release the clamping of the test block. Subsequently, the blanking electric telescopic cylinder 36 is controlled to start to drive the blanking plate 30 to move, so that the blanking plate 30 extends into the space between the clamping plate 26 and the inner side of the test seat 3, thereby pushing the broken test block out of the test seat 3 (it should be noted here that the clamped part of the test block on the test seat 3 is larger than the exposed part, so when the clamping plate 26 moves upward to release the clamping, the test block will not fall off the test seat 3), pushing it onto the rear guide block 32, and finally falling into the collection box 31 under the action of the self-gravity of the test block, so as to realize the automatic blanking of the test block after the test is completed. Then, the blanking electric telescopic cylinder 36 can be controlled to reset.

[0027] In summary, through the design of the above structure, the test block after the test on the test seat 3 can be automatically pushed out and pushed into the collection box 31 at the rear for collection and processing, so as to realize the automatic blanking of the device. There is no need for the tester to take out the test block after the test, further improving the convenience of the device.

[0028] In order to further improve the automation effect of the device, a main position sensor 33 is fixedly connected to the top end of the slider 7, and three sub-position sensors 34 are fixedly connected to the top end of the support frame 6 at equal intervals. The main position sensor 33 and the three sub-position sensors 34 are both electrically connected to the moving motor 22 through a controller; Through the settings of the main position sensor 33 and the sub-position sensors 34, the three sub-position sensors 34 can be powered on in sequence through system control. Thus, when the slider 7 moves beside the powered-on sub-position sensor 34, the main position sensor 33 detects a signal and transmits it to the controller, and the controller controls the moving motor 22 to stop running. Thereby, it can ensure that the slider 7 moves to a position above the placement frame 4 at a fixed distance, so that the thermoplastic elastomer specimen 5 can be cut at a fixed distance, ensuring the complete cutting of the specimen block without the need for operators to control, further improving the automation efficiency of the device.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention.

[0030] Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A tensile test device for a thermoplastic elastomer used for PA encapsulation, comprising a test bench (1), a tensile testing machine (2) is provided on the test bench (1), and a test seat (3) for pulling a specimen to move to both sides is provided on the tensile testing machine (2), characterized in that: A support frame (6) is fixedly connected to the top end of the test bench (1). A top groove is formed at the top end of the support frame (6). A slider (7) is slidably connected in the top groove. A moving mechanism for driving the slider (7) to move is provided on the support frame (6). The top end of the slider (7) is fixedly connected to an upper electric telescopic cylinder (8). The output end of the upper electric telescopic cylinder (8) passes through the bottom end of the slider (7) and is fixedly connected to a fixing frame (9). Cylinders (10) are fixedly connected to both sides of the bottom of the fixing frame (9). The bottom end of the cylinder (10) is provided with a spike shape. A chute is formed through the bottom wall of the outer side of the cylinder (10). A pair of top blocks (12) are horizontally slidably connected inside the chute. A return spring (35) is fixedly connected between the top blocks (12). Split ropes (13) are fixedly connected to the sides of the top blocks (12) close to each other. A main rope (14) is fixedly connected between the top ends of the split ropes (13). A winding mechanism for winding the main rope (14) is provided on the fixing frame (9). A specimen cutting die (18) is provided below the fixing frame (9).

2. The tensile testing device for thermoplastic elastomer for PA encapsulation according to claim 1, wherein: A placement frame (4) is fixedly connected to the top end of the test bench (1). A thermoplastic elastomer specimen (5) is placed in the placement frame (4). Three pairs of jacks (11) are equidistantly formed at the top end of the test bench (1) relative to the inner side position of the placement frame (4).

3. The tensile testing device for thermoplastic elastomer for PA encapsulation according to claim 1, wherein: The winding mechanism includes a driving motor (17). Upper plates (15) are fixedly connected to both sides of the top end of the fixing frame (9). A winding roller (16) is rotatably connected between the upper plates (15). The top end of the main rope (14) passes through the fixing frame (9) and is wound around the outer wall of the winding roller (16). The driving motor (17) is fixedly connected to the side wall of one of the upper plates (15). The output end of the driving motor (17) passes through the upper plate (15) and is fixedly connected to the side wall of the winding roller (16). A pair of upper guide rollers (19) are rotatably connected inside the chute. The split ropes (13) all pass through the sides of the upper guide rollers (19) close to each other.

4. A tensile test device for a thermoplastic elastomer used for PA encapsulation according to claim 3, characterized in that: Lower plates (20) are fixedly connected to the top end of the fixing frame (9) relative to the positions beside the upper plates (15). Lower guide rollers (21) are rotatably connected between the upper plates (15) and the lower plates (20). The main rope (14) all passes through above the lower guide rollers (21).

5. A tensile testing device for a thermoplastic elastomer for PA encapsulation according to claim 1, characterized in that: The moving mechanism includes a moving motor (22). The moving motor (22) is fixedly connected to the side wall of the support frame (6). A threaded rod (23) is rotatably connected inside the top groove. The output end of the moving motor (22) passes through the inside of the top groove and is fixedly connected to the side wall of the threaded rod (23). The threaded rod (23) is threadedly connected through the inner side wall of the slider (7).

6. The tensile testing device for thermoplastic elastomer for PA encapsulation according to claim 1, characterized in that: A pair of lower electric telescopic cylinders (24) are fixedly connected to the top end of the fixing frame (9). A pair of cross plates (25) are fixedly connected to the top end inside the specimen cutting die (18). The output ends of the lower electric telescopic cylinders (24) pass through the bottom end of the fixing frame (9) and are fixedly connected to the top ends of the cross plates (25).

7. A tensile test device for a thermoplastic elastomer used for PA encapsulation according to claim 1, characterized in that: The test base (3) is arranged in an L shape. A through groove is formed at the top end of the test base (3). A clamping plate (26) is slidably connected inside the through groove. Moving grooves (27) for the sliding of the cylinder (10) are formed through the top end of the clamping plate (26) and the inner side of the test base (3). A clamping electric telescopic cylinder (28) is fixedly connected to the side wall of the test base (3). The output end of the clamping electric telescopic cylinder (28) is fixedly connected to the bottom end of the clamping plate (26).

8. A tensile testing device for a thermoplastic elastomer for PA encapsulation according to claim 1, characterized in that: An L-shaped fixing plate (29) is fixedly connected to the top end of the tensile testing machine (2). A blanking plate (30) is arranged inside the fixing plate (29). A blanking electric telescopic cylinder (36) is fixedly connected to the front side of each fixing plate (29). The output end of the blanking electric telescopic cylinder (36) passes through the fixing plate (29) and is fixedly connected to the side wall of the blanking plate (30). The bottom of the fixing plate (29) is flush with the inner bottom end of the test base (3). A pair of collection boxes (31) are arranged at the top end of the test bench (1) at a position relative to the rear side of the tensile testing machine (2). A pair of material guiding blocks (32) are fixedly connected to the rear side position at the top end of the tensile testing machine (2).

9. The tensile test device for thermoplastic elastomer for PA encapsulation according to claim 5, wherein: A main position sensor (33) is fixedly connected to the top end of the slider (7). Three sub-position sensors (34) are fixedly connected to the top end of the support frame (6) at equal intervals. The main position sensor (33) and the three sub-position sensors (34) are electrically connected to the moving motor (22) through a controller.

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