A tensile property testing device for monolayer tpee cast film

Abstract

The application relates to the technical field of tensile test of cast film, in particular to a single-layer TPEE cast film tensile property test device which effectively solves the problems of errors and low efficiency of manual sample preparation, low efficiency and poor consistency of manual sample clamping, and the device comprises a base, a sample preparation table is fixedly connected to the upper end of the base, a single-layer cast film is arranged on the sample preparation table, a sample preparation groove is arranged on the sample preparation table, a sample preparation knife is arranged above the sample preparation table, and a driving assembly is arranged in the base and located below the sample preparation table; the sample preparation knife and the sample preparation groove are controlled to move cooperatively by the driving assembly, automatic cutting of the single-layer TPEE cast film is realized, the sample size is ensured to be consistent and the edge is ensured to be flat, size errors or burr problems caused by manual operation are avoided, the linkage design of the ladder-shaped driving groove and the moving rod converts horizontal movement into vertical cutting action, cutting precision and efficiency are improved, and the pain point of poor consistency of traditional manual sample preparation is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tensile test of cast film, and particularly relates to a single-layer TPEE cast film tensile performance test device. BACKGROUND

[0002] The TPEE (thermoplastic polyester elastomer) cast film is widely applied in the fields of automobiles, electronics, medical treatment and the like due to excellent elasticity, chemical resistance and processing performance. The tensile performance is a key index for measuring the quality and applicability of the TPEE cast film, and accurate detection is crucial. At present, the tensile performance test of the single-layer TPEE cast film usually relies on manual operation, including manual cutting of a standard sample, measurement of the size, and clamping of the sample on a tensile testing machine for tensile test. However, the method has significant defects. For example, the thickness uniformity and cutting edge quality of the TPEE film directly affect the test results, and manual operation cannot guarantee the uniformity of the sample size, and is prone to introduce burrs or stress concentration, leading to data deviation. From sample preparation to clamping, manual operation is completely relied on, and the clamping force and position are difficult to accurately control, which may cause sample slippage or local stress abnormality, affecting the test repeatability. Meanwhile, repeated sample clamping is required during batch testing, which cannot meet the needs of industrial production for efficient and continuous detection, and needs to be solved urgently. SUMMARY

[0003] In view of the above problems, the application aims to provide a single-layer TPEE cast film tensile performance test device, which effectively solves the problems of errors and low efficiency in manual sample preparation, and low efficiency and poor consistency in manual sample clamping.

[0004] The technical solution is that the application comprises a base, a sample preparation table is fixedly connected to the upper end of the base, a single-layer cast film is arranged on the sample preparation table, a sample preparation groove is arranged on the sample preparation table, a sample preparation knife is arranged above the sample preparation table, a driving assembly is arranged below the sample preparation table in the base, the driving assembly can drive the sample preparation knife to ascend and cut the single-layer cast film to form a sample film (48), a rectangular moving frame is slidably connected to the upper side of the base, the driving assembly can drive the moving frame to move left and right, the sample preparation table is arranged in the moving frame, a sampling assembly is arranged in the middle of the moving frame, the sampling assembly can adsorb and move the sample film (48), a lifting assembly is arranged on the upper side of the moving frame, the lifting assembly can drive the sampling assembly to ascend and rotate, a tensile frame is fixedly connected to the left side of the base, two upper and lower clamping frames are arranged on the lower side of the tensile frame, the upper clamping frame and the lower clamping frame can clamp the sample film (48), a tensile assembly is arranged in the tensile frame, and the tensile assembly can drive the upper clamping frame to move up and down.

[0005] The driving assembly comprises a driving motor fixedly connected with the base, an output end of the driving motor is fixedly connected with a lead screw one, a moving plate is fixedly connected to the lower side of the moving frame, the lower side of the moving plate is threadedly connected with the lead screw one, a front-to-rear through and stepped driving groove is formed in the middle of the moving plate, a moving rod is slidably connected to the left side of the sample preparation table on the upper side of the base, the lower side of the moving rod is fixedly connected with a driving pin located in the driving groove, the upper side of the moving rod is fixedly connected with a fixing frame, and the fixing frame is fixedly connected with the sample preparation cutter.

[0006] The sampling assembly comprises a lifting rod, a supporting rod is fixedly connected to the left side of the lifting rod, a connecting rod capable of swinging by 90 degrees is hingedly connected to the left side of the supporting rod, a fixing disc is fixedly connected to the lower end of the connecting rod, and suction discs are arranged on the left and right sides of the lower end of the fixing disc.

[0007] A push rod is slidably connected to the lower end of the supporting rod, a hinged rod is hingedly connected to the left end of the push rod, the hinged rod is hingedly connected to the middle of the left side of the connecting rod, an inclined groove with the left side higher than the right side is formed in the right side of the push rod, a contact rod is slidably connected to the middle of the lifting rod, a vertical rod is fixedly connected to the right side of the contact rod, a pressing plate is fixedly connected to the right end of the contact rod, the pressing plate is slidably connected with the vertical rod, a threaded spring is sleeved on the vertical rod and located between the pressing plate and the lifting rod, the upper end of the contact rod can be in contact with the upper side wall of the moving frame, and a connecting pin is fixedly connected to the lower end of the contact rod and located in the inclined groove.

[0008] The lifting assembly comprises a rotating motor fixedly connected with the moving frame, a lead screw two is rotatably connected to the middle of the moving frame, the lifting rod is threadedly connected with the lead screw two, and the output end of the rotating motor can drive the lead screw two to rotate through a bevel gear set.

[0009] The clamping frame comprises a support, clamping plates are slidably connected to the left and right sides of the support respectively, hinged frames are coaxially hingedly connected to the outer wall of the support, the two hinged frames form a scissor type, hinged grooves are formed in the front and rear sides of one end of the clamping plate close to the support, hinged pins are fixedly connected to the front and rear ends of the hinged frame and located in the corresponding hinged grooves, a sliding groove is formed in the left side of the hinged frame, a push plate that can move left and right is arranged in the support, and sliding pins are fixedly connected to the front and rear sides of the push plate and located in the corresponding sliding grooves.

[0010] The tension assembly comprises two front-to-rear opposite lead screws three, the lead screws three are rotatably connected with the tension frame, the lower ends of the lead screws three are fixedly connected with pulleys, the two pulleys are drivingly connected through a belt, a rotating motor is fixedly connected to the upper end of the tension frame, the output end of the rotating motor can drive the rear lead screw three to rotate through a helical gear set, and the left and right sides of the upper support are threadedly connected with the corresponding lead screws three.

[0011] The left end of the upper push plate is fixedly connected with a guide rod, the left side of the tension frame is fixedly connected with a data rod, one-way grooves are formed in the front and back sides of the data rod, the left side of the guide rod is slidably connected with the data rod, and the front and back sides of the guide rod are slidably connected with one-way pins in the corresponding one-way grooves.

[0012] The lower end of the lower push plate is fixedly connected with a trigger frame, the right end of the trigger frame can be in contact with the left end of the moving frame, the upper end of the base is fixedly connected with straight rods on the front and back sides, the front and back sides of the trigger frame are slidably connected with the corresponding straight rods, and the straight rods are sleeved with compression springs between the straight rods and the trigger frame.

[0013] The opposite ends of the two clamping plates are fixedly connected with rubber plates.

[0014] Beneficial effects:

[0015] The driving assembly controls the coordinated action of the sample preparation knife and the sample preparation groove, realizes automatic cutting of a single-layer TPEE casting film, ensures consistent sample size and smooth edges, avoids size errors or burr problems caused by manual operation, the linkage design of the stepped driving groove and the moving rod converts horizontal movement into vertical cutting action, improves cutting precision and efficiency, and solves the pain point of poor consistency of traditional manual sample preparation.

[0016] After the suction cup of the sampling assembly adsorbs the sample film, the lifting assembly drives the sample film to rotate 90° to a vertical state through the cooperation of the lead screws two and the contact rods, so that the clamping frame can accurately clamp, the mechanical linkage design realizes automatic turning and clamping positioning, reduces manual intervention, and significantly improves the continuity and repeatability of the test process.

[0017] The scissors fork type articulated frame and the bidirectional clamping plate are arranged, synchronous clamping is realized through the left and right movement of the push plate, the rubber plate prevents sample slipping, the tension assembly adopts double lead screws three and belt transmission, the stretching force is uniformly distributed, high-precision tensile property detection is realized, and the industrial continuous test demand is met. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the isometric view of the present application.

[0019] Figure 2 is a partially cutaway front view of the present application.

[0020] Figure 3 is a front view of the sample preparation table in the present application.

[0021] Figure 4 is a bottom view of the sample preparation table in the present application.

[0022] Figure 5 is a lifting rod lifting diagram in the present application.

[0023] Figure 6 This is a partial sectional front view of the lifting rod in this invention.

[0024] Figure 7 This is an exploded top view of the sample preparation stage in this invention.

[0025] Figure 8 This is a top view of the guide rod in this invention.

[0026] Figure 9 This is a bottom view of the trigger lever in this invention.

[0027] In the diagram: 1. Base; 2. Sample preparation table; 3. Single-layer cast film; 4. Sample preparation groove; 5. Sample preparation knife; 6. Moving frame; 7. Tension frame; 8. Clamping frame; 9. Drive motor; 10. Lead screw; 11. Moving plate; 12. Drive groove; 13. Moving rod; 14. Fixed frame; 15. Lifting rod; 16. Support rod; 17. Connecting rod; 18. Fixed plate; 19. Suction cup; 20. Push rod; 21. Hinge rod; 22. Inclined groove; 23. Contact rod; 24. Lower pressure plate; 25. 1. Rotary motor; 26. Lead screw II; 27. Bevel gear set; 28. Bracket; 29. ​​Clamping plate; 30. Hinge frame; 31. Hinge groove; 32. Slide groove; 33. Push plate; 34. Sliding pin; 35. Lead screw III; 36. Pulley; 37. Belt; 38. Rotary motor; 39. Helical gear set; 40. Guide rod; 41. Data rod; 42. One-way groove; 43. One-way pin; 44. Trigger frame; 45. Straight rod; 46. Compression spring; 47. Rubber plate; 48. Sample film. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Depend on Figures 1 to 9 The system includes a base 1, a sample preparation stage 2 fixedly connected to the upper right of the base 1, a single-layer cast film 3 on the sample preparation stage 2, a sample preparation groove 4 on the sample preparation stage 2, a sample preparation knife 5 above the sample preparation stage 2, a drive assembly located below the sample preparation stage 2 inside the base 1, the drive assembly can drive the sample preparation knife 5 to lift and cut the single-layer cast film 3 to form a sample film 48, a rectangular movable frame 6 slidably connected to the upper side of the base 1, the drive assembly can drive the movable frame 6 to move left and right, the sample preparation stage 2 is located inside the movable frame 6, a sampling assembly is located in the middle of the movable frame 6, the sampling assembly can adsorb and move the sample film 48, a lifting assembly is located on the upper side of the movable frame 6, the lifting assembly can drive the sampling assembly to lift, rotate and rotate, a tension frame 7 fixedly connected to the left side of the base 1, two clamping frames 8 opposite each other on the lower side of the tension frame 7, the upper clamping frame 8 and the lower clamping frame 8 can clamp the sample film 48, a tension assembly is located inside the tension frame 7, the tension assembly can drive the upper clamping frame 8 to move up and down.

[0030] As shown in the figure, the base 1 and the sample preparation table 2 can be supported as a whole by the base 1, the sample preparation table 2 on which a single layer of the cast film 3 is placed is used to place the single layer of the cast film 3, the driving assembly controls the lifting of the sample preparation knife 5 and realizes the automatic cutting of the sample mold in cooperation with the sample preparation groove 4, ensures the sample size consistency and edge quality, avoids manual errors, the moving frame 6, the sampling assembly and the lifting assembly can be used to take out the sample from in front of the sample preparation knife 5 after cutting the single layer of the cast film 3 to form the sample film 48, then the lifting assembly drives the sampling assembly to rise while driving the sampling assembly to rotate, so that the sample film 48 is rotated from horizontal to vertical state, which is convenient for subsequent precise positioning of the sample to the clamping frame 8 when the moving frame 6 is moved to the left by the driving assembly, and subsequent clamping of the clamping plate 29, the tension frame 7, the clamping frame 8 and the tension assembly can be used to fix the two ends of the sample film 48 by mechanical clamping through the clamping frame 8, then the tension assembly drives the upper clamping frame 8 to move up and down to apply tension, complete the tensile property test, ensure the accuracy of force value transmission, the present application realizes the automation of the sample preparation, sampling and testing process through integrated design, solves the problems of size error, inconsistent clamping and other problems caused by manual operation, the cooperation of the sample preparation knife 5 and the driving assembly ensures the edge quality of the sample, the adsorption and lifting function of the sampling assembly realizes the positioning and transfer of the sample film 48, which is convenient for subsequent precise clamping, improves the automation degree and reduces the problem of large human operation error.

[0031] The driving assembly comprises a driving motor 9, the driving motor 9 is fixedly connected with the base 1, the output end of the driving motor 9 is fixedly connected with a lead screw 10, the lower side of the moving frame 6 is fixedly connected with a moving plate 11, the lower side of the moving plate 11 is threadedly connected with the lead screw 10, the middle part of the moving plate 11 is provided with a front-to-back through and stepped driving groove 12, the upper side of the base 1 is slidably connected with a moving rod 13 located on the left side of the sample preparation table 2, the lower side of the moving rod 13 is fixedly connected with a driving pin located in the driving groove 12, the upper side of the moving rod 13 is fixedly connected with a fixing frame 14, and the fixing frame 14 is fixedly connected with the sample preparation knife 5.

[0032] As shown in the figure, the driving motor 9, the lead screw 10, the moving plate 11, the driving groove 12, the driving pin and the fixed frame 14 are provided as a power source, the rotary motion is converted into the linear motion of the moving plate 11 through the lead screw 10, and the sample knife 5 is lowered into the sample groove 4 when the moving frame 6 moves to the right, so as to directly control the cutting action of the sample knife 5, ensure the consistency of the cutting force and depth, complete the cutting of the single-layer casting film 3 to form the sample film 48, and the sample groove 4 and the sample knife 5 cooperate to form the shearing action, avoid the edge deformation caused by the traditional stamping, ensure the edge of the sample film 48 to be flat and without burrs, when the moving frame 6 moves to the left end limit position, the sample knife 5 rises under the action of the driving groove 12 and the moving rod 13, so as to replace the single-layer casting film 3 for the next sample film 48 manufacturing, realize the horizontal movement of the moving frame 6, drive the sample taking assembly and the sample knife 5 to move synchronously, ensure the automation of the process from cutting to transferring of the sample film 48, the lead screw transmission has high precision and can accurately control the position of the moving frame 6, avoid the error caused by manual adjustment or the sample skewing, and the subsequent measurement data has error, the driving motor 9, the lead screw 10 and the moving plate 11 are cooperated to realize the horizontal movement of the moving frame 6, the horizontal motion is converted into the vertical motion of the moving rod 13 through the mechanical linkage of the driving groove 12 and the driving pin, so as to control the lifting of the sample knife 5. This design makes the cutting action of the sample knife 5 synchronous with the displacement of the moving frame 6, ensures that the sample film 48 can be accurately transferred to the clamping station after being cut automatically, and the integrated design of the driving assembly reduces the manual intervention and improves the cutting precision and efficiency.

[0033] The sample taking assembly comprises a lifting rod 15, a supporting rod 16 is fixedly connected to the left side of the lifting rod 15, a connecting rod 17 capable of swinging by 90 degrees is hinged to the left side of the supporting rod 16, a fixed disc 18 is fixedly connected to the lower end of the connecting rod 17, and suction discs 19 are arranged on the left and right sides of the lower end of the fixed disc 18.

[0034] As shown in the figure, the lifting rod 15 is provided as a core supporting component, is linked with the lifting assembly to realize vertical movement, ensures that the sample taking assembly can move synchronously with the moving frame 6 and be accurately positioned to the position of the sample film 48, the supporting rod 16 and the connecting rod 17 are provided, the connecting rod 17 can swing by 90 degrees through the hinge, the fixed disc 18 and the suction discs 19 can be rotated from the horizontal adsorption state to the vertical state, the sample film 48 can be transferred from the cutting station to the clamping station, manual intervention is reduced, the fixed disc 18 and the suction discs 19 are provided, uniform adsorption force can be provided through the layout of the two suction discs 19, local deformation of the sample film 48 is avoided, the fixed disc 18 is a rigid carrier, ensures the adsorption stability, prevents the sample film 48 from falling off or deviating during the transferring process, the position of the suction disc 19 will not affect the clamping of the clamping plate 29, the clamping plate 29 will not contact the suction disc 19, collision leading to damage of the device is avoided, the suction disc 19 is communicated with the air pump outside through an air pipe, and the air pump is used for controlling the suction and release of the sample film 48 by the suction disc 19.

[0035] The lower end of the supporting rod 16 is slidingly connected with a push rod 20, the left end of the push rod 20 is hingedly connected with a hinge rod 21, the hinge rod 21 is hingedly connected with the middle part of the left side of the connecting rod 17, the right side of the push rod 20 is provided with an inclined slot 22 with the left side being higher than the right side, the middle part of the lifting rod 15 is slidingly connected with a contact rod 23, the middle part of the lifting rod 15 is fixedly connected with a vertical rod located to the right of the contact rod 23, the right end of the contact rod 23 is fixedly connected with a pressing plate 24, the pressing plate 24 is slidingly connected with the vertical rod, the vertical rod is sleeved with a threaded spring located between the pressing plate 24 and the lifting rod 15, the upper end of the contact rod 23 can be in contact with the upper side wall of the moving frame 6, and the lower end of the contact rod 23 is fixedly connected with a connecting pin located in the inclined slot 22.

[0036] As shown in the figure, the push rod 20 and the hinge rod 21 are arranged to cooperate with the connecting pin in the inclined slot 22 with the left side being higher than the right side through the push rod 20, when the contact rod 23 is pressed, the connecting pin slides along the inclined slot 22, the push rod 20 is pushed to move to the left, the hinge rod 21 converts the linear motion of the push rod 20 into the rotary motion of the connecting rod 17, the 90° swing of the fixed disc 18 and the suction disc 19 is realized, the sample film 48 is converted from the horizontal state to the vertical state, the contact rod 23 is arranged to be in contact with the upper side wall of the moving frame 6, which is convenient for the contact rod 23 to be pressed when the lifting assembly drives the lifting rod 15 to rise, triggering the subsequent action, the threaded spring is arranged to provide a restoring force, ensuring that the contact rod 23 is automatically reset when the lifting rod 15 descends, keeping the system circulation, through the linkage design of the push rod 20, the hinge rod 21 and the inclined slot 22, the vertical motion of the lifting rod 15 is converted into the 90° rotary motion of the connecting rod 17, driving the suction disc 19 to switch from the horizontal adsorption state to the vertical clamping state, the contact of the contact rod 23 with the upper wall of the moving frame 6 triggers the pressing action, the connecting pin slides along the inclined slot 22 to push the push rod 20, and then drives the connecting rod 17 to swing through the hinge rod 21, and the vertical rod and the threaded spring ensure that the contact rod 23 is reset, this design realizes the automatic turning and positioning of the sample film 48 after cutting, without manual intervention, solving the problems of low efficiency and easy deviation in the traditional process.

[0037] The lifting assembly comprises a rotary motor 25, the rotary motor 25 is fixedly connected with the moving frame 6, a second lead screw 26 is rotatably connected with the middle part of the moving frame 6, the lifting rod 15 is threadedly connected with the second lead screw 26, and the output end of the rotary motor 25 can drive the second lead screw 26 to rotate through a bevel gear set 27.

[0038] As shown in the figure, the rotating motor 25 is arranged as a power source, fixed on the moving frame 6, and drives the screw No. 2 26 to rotate through the bevel gear set 27, provides the lifting power of the lifting rod 15, ensures that the sampling assembly can move up and down accurately, realizes the accurate lifting of the lifting rod 15, ensures that the sample film 48 can be lifted stably after cutting, and cooperates with the subsequent rotating action. The bevel gear set 27 is meshed at 90 degrees by two bevel gears, connected with the output end of the rotating motor 25 and the screw No. 2 26, changes the transmission direction, so that the motor can still drive the vertical screw horizontally installed, optimizes the space layout, and avoids the interference problem caused by the direct vertical installation of the motor.

[0039] The clamping frame 8 comprises a support 28, the left and right sides of the support 28 are respectively slidably connected with clamping plates 29, the outer wall of the support 28 is coaxially hinged with hinged frames 30, the two hinged frames 30 form a scissor type, the front and rear sides of one end of the clamping plate 29 close to the support 28 are respectively provided with hinged grooves 31, the front and rear ends of the hinged frame 30 are respectively fixedly connected with hinged pins located in the corresponding side hinged grooves 31, the left side of the hinged frame 30 is provided with a sliding groove 32, and the support 28 is provided with a push plate 33 which can move left and right, and the front and rear sides of the push plate 33 are respectively fixedly connected with sliding pins 34 located in the corresponding side sliding grooves 32.

[0040] As shown in the figure, the support 28 is arranged as the main frame of the clamping frame 8, provides the installation basis for the clamping plate 29 and the hinged frame 30, ensures uniform transmission of clamping force, the clamping plate 29 is arranged for bidirectional stable clamping of the sample film 48, avoids sample deviation or slipping caused by unilateral stress, the scissor type hinged frame 30, the hinged groove 31, the hinged pin, the sliding groove 32, the sliding pin 34 and the push plate 33 can convert the horizontal movement of the push plate 33 into the synchronous movement of the clamping plate 29, thereby driving the two clamping plates 29 to clamp or release the sample film 48 synchronously, the mechanical linkage ensures consistent clamping force, prevents the sample film 48 from being skewed, the scissor structure enlarges the displacement of the push plate 33, the clamping plate 29 responds quickly, and the clamping efficiency is improved.

[0041] The tension assembly comprises two front and rear opposite screw No. 3s 35, the screw No. 3s 35 are rotationally connected with the tension frame 7, the screw No. 3s 35 are fixedly connected with pulleys 36 at the lower ends, the two pulleys 36 are drivingly connected through a belt 37, the tension frame 7 is fixedly connected with a rotating motor 38 at the upper end, the output end of the rotating motor 38 can drive the rear screw No. 3 to rotate through a bevel gear set 39, and the front and rear sides of the support 28 are respectively screw-connected with the corresponding side screw No. 3s 35.

[0042] As shown in the figure, the screw three 35 is arranged, two front and rear opposite screw three 35 is connected with the tension frame 7 rotation, ensure synchronous movement, avoid unilateral stress uneven lead to sample film 48 stretch when the deflection, set up two pulley 36 through the belt 37 connection, ensure that the front and rear screw three 35 synchronous rotation, avoid because of motor drive error lead to both sides of the movement out of sync, set the rotating motor 38 as power source, through the helical gear set 39 drive rear screw three 35 rotation, helical gear set 39 change transmission direction, so that the motor can be installed horizontally, optimize space layout, set the upper side of the bracket 28 through the thread connection and screw three 35 cooperation, make the screw three 35 rotation movement into the vertical lifting of bracket 28, realize accurate stretch control, threaded drive has self locking, can be in any position to maintain tension, avoid test process because of the change of external force lead to clamping loose, realize the tensile test of the cast film sample, the existing tensile machine can complete the detection of the tensile force of the cast film, here set up on the basis of the existing tensile machine to realize different functions, through the double screw synchronous drive, belt 37 transmission and helical gear optimization layout, realize the high precision, automation and stability of the cast film tensile test, solve the problem of uneven stress, large artificial error in the traditional test method, suitable for standardized mechanical property test.

[0043] The left end of the upper push plate 33 is fixedly connected with a guide rod 40, and the left side of the tension frame 7 is fixedly connected with a data rod 41. Unidirectional grooves 42 are formed in the front and rear sides of the data rod 41. The left side of the guide rod 40 is slidably connected with the data rod 41. The front and rear sides of the guide rod 40 are slidably connected with unidirectional pins 43 in the corresponding unidirectional grooves 42.

[0044] As shown in the figure, the guide rod 40, the one-way slot 42, the reset spring and the one-way pin 43 can replace the traditional hydraulic or electromagnetic clamping with mechanical self-locking, simplify the system complexity, and realize the relative movement of the clamping plate 29 by moving the guide rod 40 in the one-way slot 42, thereby achieving the purpose of clamping or loosening. The one-way slot 42 is a parallelogram divided into four parts. The first part is the downward groove on the right side. When the one-way pin 43 is located here, the upper clamping frame 8 is in a loosened state, facilitating the clamping of the sample film 48. The second part is the leftmost groove. When the one-way pin 43 is located here, the two clamping plates 29 on the upper clamping frame 8 move relative to each other to clamp the sample film 48. The third part is the upward groove on the left side. When the one-way pin 43 is located here, the upper clamping frame 8 completes the clamping of the sample film 48 and starts to stretch the sample film 48 until the sample film 48 breaks, completing the tensile test. The fourth part is the rightmost groove. When the one-way pin 43 is located here, the two clamping plates 29 on the upper clamping frame 8 move away from each other to loosen the sample film 48 fragments that have completed the test, and then enter the downward groove to complete the cycle, ready for the second test. The data rod 41 is provided with different scales to facilitate the observation of the stretching length and other data.

[0045] The lower end of the lower push plate 33 is fixedly connected with a trigger frame 44, and the right end of the trigger frame 44 can contact the left end of the moving frame 6. The upper end of the base 1 is fixedly connected with straight rods 45 on the front and rear sides. The trigger frame 44 is slidably connected with the straight rods 45 on the corresponding sides. The straight rods 45 are sleeved with compression springs 46 between the straight rods 45 and the trigger frame 44.

[0046] As shown in the figure, the trigger frame 44, the straight rod 45 and the compression spring 46 can be used when the moving frame 6 transports the sample film 48 to the left. When the sample film 48 contacts the lower right clamping plate 29 and enters between the two lower clamping plates 29, the left end of the moving frame 6 contacts the trigger frame 44 and pushes the trigger frame 44 to the left, thereby driving the lower push plate 33 to the left, closing the clamping plate 29 to clamp the sample film 48. When the moving frame 6 moves to the right, the compression spring 46 pushes the trigger frame 44 to reset, and the clamping plate 29 automatically loosens to release the tested sample. This design realizes the synchronization of the clamping action and the movement of the moving frame 6, ensuring the automation of the test process.

[0047] The opposite ends of the two clamping plates 29 are fixedly connected with rubber plates 47.

[0048] As shown in the figure, the rubber plate 47 has a high friction coefficient, which can effectively prevent the sample film 48 from sliding or falling off during the tensile test, ensuring the clamping stability. At the same time, the elasticity of rubber can reduce the local stress concentration of the sample film 48 during clamping, avoid damage to the edges of the sample film 48 due to hard clamping, and ensure the accuracy of the test data.

[0049] In use, the single-layer TPEE casting film is laid on the sample preparation table 2 to ensure that the film material covers the sample preparation groove 4 area, the driving motor 9 is started, the screw rod one 10 rotates to drive the moving frame 6 to move right, the stepped drive groove 12 on the moving plate 11 pushes the drive pin to move down, the fixed frame 14 drives the sample preparation knife 5 to vertically descend, the punching of the casting film is completed, the standard size sample film 48 is formed, the sample film 48 is like a dumbbell, and the shearing cooperation of the sample preparation knife 5 and the sample preparation groove 4 ensures that the edge is free of burrs.

[0050] The rotating motor 25 drives the screw rod two 26 to rotate through the bevel gear set 27, the lifting rod 15 drives the suction disc 19 to descend to the surface of the sample film 48, the air pump is started, the suction disc 19 adsorbs and fixes the sample film 48, then the rotating motor 25 is started in reverse to drive the lifting rod 15 to rise, when the lifting rod 15 rises, the contact rod 23 contacts the upper wall of the moving frame 6 and is pressed down, the push rod 20 slides to the left under the action of the connecting pin and the inclined groove 22, the articulated rod 21 pushes the connecting rod 17 to rotate 90°, and the sample film 48 is converted from a horizontal state to a vertical state.

[0051] The driving motor 9 is reversed, the moving frame 6 moves left, and the sample film 48 is accurately transported between the upper and lower clamping frames 8, during which the left end of the moving frame 6 contacts the trigger frame 44, the push plate 33 of the lower clamping frame 8 moves left, the lower scissor-type articulated frame 30 is linked to make the lower clamping plate 29 close, the rubber plate 47 clamps the lower end of the sample film 48, the guide rod 40 of the upper clamping frame 8 is guided by the one-way groove 42, the one-way pin 43 moves along the path from the descending groove to the left groove, and the upper push plate 33 moves left to complete the upper end clamping.

[0052] The rotating motor 38 drives the double screw rod three 35 to rotate synchronously through the helical gear set 39 and the belt 37, the upper clamping frame 8 rises at a constant speed, the sample film 48 is stretched to break, the data rod 41 records the displacement and force value curve in real time, after the test is completed, the one-way pin 43 moves along the path from the ascending groove to the right groove, and the clamping plate 29 is automatically released.

[0053] After the moving frame 6 slightly moves right to be not in contact with the trigger frame 44, the compression spring 46 pushes the trigger frame 44 to restore the initial position, the lower clamping frame 8 is opened, and then a new single-layer casting film 3 can be placed to prepare a new sample film 48 for repeated testing.

[0054] In the application, all motors and the tension frame 7 are prior art, which will not be described in detail here.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or changes in the specific embodiments described herein can occur to those skilled in the art to which the application pertains without departing from the spirit of the application, and it is understood that such modifications or changes are to be considered as within the scope of the application as defined by the appended claims.

Claims

1. A testing device for the tensile properties of a single-layer TPEE cast film, comprising a base (1), characterized in that, A sample preparation stage (2) is fixedly connected to the upper right of the base (1). A single-layer cast film (3) is provided on the sample preparation stage (2). A sample preparation groove (4) is opened on the sample preparation stage (2). A sample preparation knife (5) is provided above the sample preparation stage (2). A drive assembly located below the sample preparation stage (2) is provided inside the base (1). The drive assembly can drive the sample preparation knife (5) to lift and cut the single-layer cast film (3) to form a sample film (48). A rectangular movable frame (6) is slidably connected to the upper side of the base (1). The drive assembly can drive the movable frame (6) to move left and right. The sample preparation stage (2) is located at Inside the movable frame (6), a sampling component is provided in the middle of the movable frame (6). The sampling component can adsorb and move the sample membrane (48). A lifting component is provided on the upper side of the movable frame (6). The lifting component can drive the sampling component to lift and rotate. A tension frame (7) is fixedly connected to the left side of the base (1). Two clamping frames (8) are provided on the lower side of the tension frame (7). The upper clamping frame (8) and the lower clamping frame (8) can clamp the sample membrane (48). A tension component is provided inside the tension frame (7). The tension component can drive the upper clamping frame (8) to move up and down. The drive assembly includes a drive motor (9), which is fixedly connected to the base (1). The output end of the drive motor (9) is fixedly connected to a lead screw (10). A moving plate (11) is fixedly connected to the lower middle part of the moving frame (6). The lower side of the moving plate (11) is threadedly connected to the lead screw (10). A stepped drive groove (12) is opened in the middle of the moving plate (11). A moving rod (13) located on the left side of the sample preparation table (2) is slidably connected to the upper side of the base (1). A drive pin located in the drive groove (12) is fixedly connected to the lower side of the moving rod (13). A fixed frame (14) is fixedly connected to the upper side of the moving rod (13). The fixed frame (14) is fixedly connected to the sample preparation knife (5). The sampling assembly includes a lifting rod (15), a support rod (16) is fixedly connected to the left side of the lifting rod (15), a connecting rod (17) that can swing ninety degrees is hinged to the left side of the support rod (16), a fixed plate (18) is fixedly connected to the lower end of the connecting rod (17), and suction cups (19) are respectively provided on the left and right sides of the lower end of the fixed plate (18). The lower end of the support rod (16) is slidably connected to a push rod (20), and the left end of the push rod (20) is hinged to a hinge rod (21). The hinge rod (21) is hinged to the middle left side of the connecting rod (17). The push rod (20) has an inclined groove (22) with the left side higher than the right side. The middle part of the lifting rod (15) is slidably connected to a contact rod (23). The middle part of the lifting rod (15) is fixedly connected to a vertical rod located to the right of the contact rod (23). The right end of the contact rod (23) is fixedly connected to a lower pressure plate (24). The lower pressure plate (24) is slidably connected to the vertical rod. A threaded spring is sleeved on the vertical rod between the lower pressure plate (24) and the lifting rod (15). The upper end of the contact rod (23) can contact the upper side wall of the moving frame (6). The lower end of the contact rod (23) is fixedly connected to a connecting pin located in the inclined groove (22).

2. The tensile performance testing device for a single-layer TPEE cast film according to claim 1, characterized in that, The lifting assembly includes a rotary motor (25), which is fixedly connected to a movable frame (6). A second lead screw (26) is rotatably connected to the middle of the movable frame (6). The lifting rod (15) is threadedly connected to the second lead screw (26). The output end of the rotary motor (25) can drive the second lead screw (26) to rotate via a bevel gear set (27).

3. The tensile performance testing device for a single-layer TPEE cast film according to claim 1, characterized in that, The clamping frame (8) includes a bracket (28), with clamping plates (29) slidably connected to the left and right sides of the bracket (28), and a hinge frame (30) coaxially hinged to the outer wall of the bracket (28). The two hinge frames (30) form a scissor type. The clamping plate (29) has hinge slots (31) on the front and rear sides of the end near the bracket (28). The hinge frame (30) has hinge pins fixedly connected to the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the hinge frame (30) in the corresponding side hinge slots (31). A sliding groove (32) is provided on the left side of the hinge frame (30). A push plate (33) that can move left and right is provided inside the bracket (28). The push plate (33) has sliding pins (34) fixedly connected to the front and rear ends of the front and rear ends of the front and rear ends of the front and rear ends of the push plate (33) in the corresponding side sliding grooves (32).

4. The tensile strength testing device for a single-layer TPEE cast film according to claim 3, characterized in that, The tension assembly includes two lead screws (35) facing each other. The lead screws (35) are rotatably connected to the tension frame (7). The lower end of the lead screws (35) is fixedly connected to a pulley (36). The two pulleys (36) are connected by a belt (37). The upper end of the tension frame (7) is fixedly connected to a rotating motor (38). The output end of the rotating motor (38) can drive the lead screws (35) on the rear side to rotate through a helical gear set (39). The upper bracket (28) is threadedly connected to the lead screws (35) on the front and rear sides respectively.

5. The tensile strength testing device for a single-layer TPEE cast film according to claim 3, characterized in that, The upper push plate (33) is fixedly connected to the left end of the guide rod (40), and the tension frame (7) is fixedly connected to the left side of the data rod (41). The data rod (41) has one-way grooves (42) on the front and rear sides respectively. The guide rod (40) is slidably connected to the data rod (41) on the left side. The guide rod (40) is slidably connected to the one-way pins (43) located in the one-way grooves (42) on the front and rear sides respectively via reset springs.

6. The tensile performance testing device for a single-layer TPEE cast film according to claim 3, characterized in that, The lower end of the push plate (33) on the lower side is fixedly connected to a trigger frame (44). The right end of the trigger frame (44) can contact the left end of the movable frame (6). Straight rods (45) are fixedly connected to the front and rear sides of the upper end of the base (1). The front and rear sides of the trigger frame (44) are slidably connected to the straight rods (45) on their corresponding sides. A compression spring (46) is sleeved on the straight rod (45) between the straight rod (45) and the trigger frame (44).

7. The tensile performance testing device for a single-layer TPEE cast film according to claim 3, characterized in that, Rubber plates (47) are fixedly connected to the opposite ends of the two clamping plates (29).

Images