A polypropylene film stretching detection device

Abstract

The application discloses a polypropylene film stretching detection equipment and belongs to the technical field of film stretching detection, and the technical points are as follows: the equipment comprises a bottom plate, a positioning rotary clamping mechanism is arranged, the transmission and clamping control of the film can be well completed, the film detection processing is facilitated, one-way stretching detection and two-way stretching detection of the polypropylene film can be realized, the detection time is greatly saved, the detection efficiency is improved, the equipment has strong universality and applicability, the position of a detection head does not need to be manually adjusted by a worker through the arrangement of the detection mechanism, the detection head can be quickly moved to a suitable position, the detection preparation time is greatly shortened, the continuity and efficiency of the detection are improved, the manual intervention is reduced, the working strength and operation difficulty of the operator are reduced, the working efficiency is obviously improved, the equipment has the advantages of being convenient for replacing and clamping the film roller, being convenient for two-way stretching of the film and being convenient for detection.

Description

Technical Field

[0001] This invention relates to the field of film tensile testing, and more specifically to a polypropylene film tensile testing device. Background Technology

[0002] Polypropylene film is lightweight, transparent, moisture-proof, insulating, and has high mechanical strength, making it widely used in packaging, electronics, and electrical appliances. During the production of polypropylene film, tensile properties are a crucial indicator of its quality, directly impacting its reliability and suitability in subsequent use.

[0003] Current polypropylene film tensile testing equipment has the following problems: First, the existing tensile mechanism clamps are not convenient for replacing the film rollers or for better clamping, and the clamping is unstable, resulting in inaccurate test data. Second, most existing tensile testing equipment is unidirectional tensile, which cannot well simulate the bidirectional stress state in actual processing, resulting in poor test results. Furthermore, during the film testing process, the test position cannot be well adjusted, requiring constant manual adjustment, which greatly reduces the testing efficiency and fails to meet the needs of actual use.

[0004] Therefore, there is a need to provide a polypropylene film tensile testing device to solve the above problems. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a polypropylene film tensile testing device, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A polypropylene film tensile testing device includes a base plate, a third transfer plate movably connected to the base plate, a film roller for transferring the film on the third transfer plate, and further includes:

[0008] A positioning and rotating clamping mechanism is mounted on a third movable plate for positioning, rotating, clamping, and controlling the stretching of a film roller. The positioning and rotating clamping mechanism includes a first pair of connecting pipes and a second pair of connecting pipes for positioning the installation of the film roller. The first pair of connecting pipes and the second pair of connecting pipes are rotatably mounted on a movable upright plate. A first clamping plate and a second clamping plate for positioning and clamping are provided on the outer sides of the first pair of connecting pipes and the second pair of connecting pipes.

[0009] A stretching drive mechanism is installed at the connection between the third moving plate and the base plate, and is used to drive the film on the third moving plate to perform stretching detection.

[0010] The testing mechanism, mounted on the third transfer plate, is used to perform range testing on the stretched film. The testing mechanism includes a testing head and a testing support. The testing head is mounted on the testing support via a second electric push rod. The position of the testing support is adjusted and tested by the rotation of several driven rollers, as well as a first control roller and a second control roller.

[0011] As a further embodiment of the present invention, the positioning and rotating clamping mechanism further includes a first motor for driving the film roller to rotate. The two ends of the film roller are provided with square mounting blocks. The first pair of connecting pipes and the second pair of connecting pipes are provided with square grooves that are adapted to and connected to the square mounting blocks. A first gear is fixedly connected to the second pair of connecting pipes. A second gear is meshed with the first gear. The second gear is fixedly connected to the output shaft of the first motor. The first motor is fixedly mounted on the movable upright plate.

[0012] As a further embodiment of the present invention, the positioning and rotating clamping mechanism further includes a third gear and a fourth gear for positioning and controlling the rotation of the film roller by driving the first clamping plate and the second clamping plate. The third gear is fixedly connected to one end of the first clamping plate, and the fourth gear is fixedly connected to one end of the second clamping plate. The third gear and the fourth gear are meshed and connected. The third gear is rotatably connected to the support plate through a first connecting shaft, and the fourth gear is rotatably connected to the support plate through a second connecting shaft. The support plate is fixedly installed on the third moving plate.

[0013] As a further embodiment of the present invention, the positioning and rotating clamping mechanism further includes a second wedge block and a first wedge block for driving the first clamping plate and the second clamping plate to perform clamping control. The first wedge block is fixedly connected to one end of the traction block. The traction block is rotatably connected to one end of the first clamping plate through a traction rod. A fixing plate is provided inside the support plate. A spring is provided at the connection between the first clamping plate and the fixing plate. A second wedge block is adapted to slide on one side of the first wedge block. The second wedge block is fixedly connected to the piston rod of the second bidirectional push rod. A protective cover for protection is provided on the outside of the second bidirectional push rod.

[0014] As a further embodiment of the present invention, the positioning and rotating clamping mechanism further includes a first bidirectional push rod for driving the movable upright plate to move and connect, the movable upright plate is limited and slidably connected to the third moving plate, the movable upright plate is fixedly connected to the piston rod of the first bidirectional push rod, and the first bidirectional push rod is fixedly installed on the third moving plate.

[0015] As a further embodiment of the present invention, a tensioning roller for tension adjustment is provided on one side of the film roller. The tensioning roller is fixedly connected to the piston rod of the first electric push rod, the first electric push rod is fixedly installed on the support frame, and the support frame is fixedly installed on the third moving plate.

[0016] As a further embodiment of the present invention, the detection mechanism further includes a transmission belt, a second moving plate, and a first moving plate for driving the detection support seat to move and adjust. The detection support seat is slidably connected to the second moving plate, the second moving plate is slidably connected to the first moving plate, and the first moving plate is slidably connected to the third moving plate. The transmission belt is drivenly connected to the driven roller, the first control roller, and the second control roller, and the detection support seat is fixedly connected to the transmission belt. The first control roller is fixedly connected to the output shaft of the second motor, the second control roller is fixedly connected to the output shaft of the third motor, and both the second motor and the third motor are fixedly mounted on the first moving plate.

[0017] As a further embodiment of the present invention, the stretching drive mechanism includes a guide plate for guiding the movement of the third moving plate and a bidirectional lead screw for movement control. The bidirectional lead screw is rotatably connected to the base plate, the guide plate is fixedly installed on the base plate, the third moving plate is limited and slidably connected to the base plate through the guide plate, and the third moving plate is threadedly connected to the bidirectional lead screw.

[0018] As a further embodiment of the present invention, the tensioning drive mechanism further includes a fourth motor for driving the bidirectional lead screw to rotate. A worm gear is fixedly connected to the bidirectional lead screw, and a worm is meshed with the worm gear. The worm is rotatably connected to the inside of the base plate, and the output shaft of the fourth motor is fixedly connected to the worm. The fourth motor is fixedly installed inside the base plate.

[0019] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0020] This invention utilizes a positioning and rotating clamping mechanism to effectively transmit and clamp the film, facilitating subsequent film inspection and processing. It enables both uniaxial and biaxial tensile testing of polypropylene films. Compared to traditional single-mode testing, this provides a comprehensive evaluation of the film's tensile properties, enhancing the product's market competitiveness. Furthermore, the integrated uniaxial and biaxial tensile testing eliminates the need to switch between different devices, significantly reducing testing time and improving efficiency. With strong versatility and applicability, this invention can meet the needs of enterprises with varying production scales and application requirements, demonstrating broad market potential.

[0021] When testing polypropylene films of different specifications using the set-up testing mechanism, there is no need for manual adjustment of the testing head position. The automatic adjustment mechanism can quickly move the testing head to the appropriate position, significantly shortening the testing preparation time. When continuously testing different batches and specifications of films, it can significantly improve the continuity and efficiency of testing. Compared with traditional testing methods, it can significantly improve the overall testing efficiency and effectively meet the testing needs of large-scale production. The automatic adjustment function of the testing head position reduces manual intervention. Operators only need to place the film on the testing equipment and start the testing program. There is no need to frequently adjust the testing head position, which reduces the workload and difficulty of operation for operators and significantly improves work efficiency.

[0022] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of the invention.

[0024] Figure 2 This is a top view of an embodiment of the invention.

[0025] Figure 3 This is a side view of an embodiment of the invention.

[0026] Figure 4 This is a schematic diagram of the installation structure of the film roller in an embodiment of the invention.

[0027] Figure 5 for Figure 4 A magnified structural diagram of A in the diagram.

[0028] Figure 6 This is a schematic diagram of the connection structure inside the support plate in an embodiment of the invention.

[0029] Figure 7 for Figure 6 A magnified structural diagram of B in the diagram.

[0030] Figure 8 This is an exploded view of the film roller connection in an embodiment of the invention.

[0031] Figure 9 This is a side view of the exploded structure of the film roller connection in an embodiment of the invention.

[0032] Figure 10 This is a schematic diagram of the connection structure of the detection support base in an embodiment of the invention.

[0033] Figure 11 This is a top view of the third sliding plate connection in an embodiment of the invention.

[0034] Figure 12 for Figure 11 A magnified structural diagram of C.

[0035] Reference numerals: 1. Base plate; 2. Film; 3. Film roller; 4. Movable upright plate; 5. First bidirectional push rod; 6. Square mounting block; 7. First connecting pipe; 8. Second connecting pipe; 9. Square groove; 10. First gear; 11. Second gear; 12. First motor; 13. First clamping plate; 14. Second clamping plate; 15. Third gear; 16. Fourth gear; 17. First connecting shaft; 18. Second connecting shaft; 19. Traction rod; 20. Traction block; 21. First wedge block; 22. Spring; 23. Fixing plate; 24. Support plate; 25. Second wedge block; 26. Second bidirectional push rod; 27. Protective cover; 28. Support frame; 29. ​​First electric push rod; 30. Tensioning roller; 31. Detection support seat; 32. Detection head; 33. Second electric push rod; 34. Transmission belt; 35. Driven roller; 36. First control roller; 37. Second control roller; 38. Second motor; 39. Third motor; 40. First moving plate; 41. Second moving plate; 42. Guide slide plate; 43. Bidirectional lead screw; 44. Third moving plate; 45. Worm gear; 46. Worm; 47. Fourth motor. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example

[0038] See Figures 1-10 A polypropylene film tensile testing device includes a base plate 1, a third transfer plate 44 movably connected to the base plate 1, and a film roller 3 for transferring a film 2 disposed on the third transfer plate 44. The device also includes:

[0039] The positioning and rotating clamping mechanism is mounted on the third moving plate 44 and is used for positioning, rotating and clamping the film roller 3 to stretch. The positioning and rotating clamping mechanism includes a first pair of pipes 7 and a second pair of pipes 8 for positioning the installation of the film roller 3. The first pair of pipes 7 and the second pair of pipes 8 are rotatably mounted on the moving upright plate 4. The outer sides of the first pair of pipes 7 and the second pair of pipes 8 are provided with a first clamping plate 13 and a second clamping plate 14 for positioning and clamping.

[0040] Furthermore, the positioning and rotating clamping mechanism also includes a first motor 12 for driving the film roller 3 to rotate. Square mounting blocks 6 are provided at both ends of the film roller 3. Square grooves 9 that are adapted to and connected to the square mounting blocks 6 are provided on the first pair of pipes 7 and the second pair of pipes 8. A first gear 10 is fixedly connected to the second pair of pipes 8. A second gear 11 is meshed on the first gear 10. The second gear 11 is fixedly connected to the output shaft of the first motor 12. The first motor 12 is fixedly mounted on the movable upright plate 4.

[0041] Furthermore, the positioning and rotating clamping mechanism also includes a third gear 15 and a fourth gear 16 for positioning and controlling the rotation of the film roller 3 by driving the first clamping plate 13 and the second clamping plate 14. The third gear 15 is fixedly connected to one end of the first clamping plate 13, and the fourth gear 16 is fixedly connected to one end of the second clamping plate 14. The third gear 15 and the fourth gear 16 are meshed and connected. The third gear 15 is rotatably connected to the support plate 24 through the first connecting shaft 17, and the fourth gear 16 is rotatably connected to the support plate 24 through the second connecting shaft 18. The support plate 24 is fixedly installed on the third moving plate 44.

[0042] Furthermore, the positioning and rotating clamping mechanism also includes a second wedge block 25 and a first wedge block 21 for driving the first clamping plate 13 and the second clamping plate 14 to perform clamping control. The first wedge block 21 is fixedly connected to one end of the traction block 20. The traction block 20 is rotatably connected to one end of the first clamping plate 13 through the traction rod 19. A fixing plate 23 is provided inside the support plate 24. A spring 22 is provided at the connection between the first clamping plate 13 and the fixing plate 23. The second wedge block 25 is adapted to slide on one side of the first wedge block 21. The second wedge block 25 is fixedly connected to the piston rod of the second bidirectional push rod 26. A protective cover 27 for protection is provided on the outside of the second bidirectional push rod 26.

[0043] Furthermore, the positioning and rotating clamping mechanism also includes a first bidirectional push rod 5 for driving the movable upright plate 4 to move and connect. The movable upright plate 4 is limited and slidably connected to the third moving plate 44. The piston rod of the first bidirectional push rod 5 is fixedly connected to the movable upright plate 4, and the first bidirectional push rod 5 is fixedly installed on the third moving plate 44.

[0044] Furthermore, a tensioning roller 30 for tension adjustment is provided on one side of the film roller 3. The tensioning roller 30 is fixedly connected to the piston rod of the first electric push rod 29. The first electric push rod 29 is fixedly installed on the support frame 28, and the support frame 28 is fixedly installed on the third moving plate 44.

[0045] Preferably, during the tensile testing of the film 2, the first bidirectional push rod 5 drives the movable upright plate 4 to perform corresponding position adjustment control according to the length of the film roller 3. Thus, the film roller 3 can be fitted into the square groove 9 on the first pair of connecting pipes 7 and the second pair of connecting pipes 8 through the square mounting block 6 for limiting treatment. At this time, according to the range that the film 2 needs to be measured, the first motor 12 on the movable upright plate 4 can be rotated, that is, the first motors 12 on both sides rotate synchronously in the same direction to perform the transmission processing of the film 2. At this time, the output shaft of the first motor 12 drives the second gear 11 to rotate. Under the meshing connection between the second gear 11 and the first gear 10, the film roller 3 on the second pair of connecting pipes 8 and the first pair of connecting pipes 7 is driven to rotate.

[0046] When the film 2 is driven to the position where it needs to be measured, the first motor 12 stops rotating, and the second bidirectional push rod 26 drives the second wedge block 25 to retract at both ends. At this time, under the elastic action of the spring 22, the first clamping plate 13 is driven to rotate. Since the third gear 15 and the fourth gear 16 are in the meshing position, the first clamping plate 13 and the second clamping plate 14 move closer to each other and rotate, thereby completing the braking and clamping control of the first pair of connecting pipes 7 and the second pair of connecting pipes 8. Then, the first electric push rod 29 on the support frame 28 drives the tensioning roller 30 to rise and fall, thereby completing the tension adjustment of the film 2, so as to facilitate the subsequent detection and processing of the film 2 and significantly improve the subsequent detection efficiency.

[0047] This invention can simultaneously perform uniaxial and biaxial tensile testing on polypropylene films. Compared with traditional single testing methods, it can effectively achieve a comprehensive evaluation of the tensile properties of film 2, enhancing the product's competitiveness in the market. Furthermore, the device integrates uniaxial and biaxial tensile functions, eliminating the need to switch between different devices, greatly saving testing time and improving testing efficiency. It has strong versatility and applicability, meeting the needs of enterprises with different production scales and application requirements, and has broad market promotion value. Example

[0048] like Figures 1-12 As shown, this embodiment, based on embodiment 1, further includes a stretching drive mechanism, which is installed at the connection between the third moving plate 44 and the base plate 1, and is used to drive the film 2 on the third moving plate 44 to perform stretching detection; and

[0049] The testing mechanism, which is mounted on the third moving plate 44, is used to perform range testing on the stretched film 2. The testing mechanism includes a testing head 32 and a testing support 31. The testing head 32 is mounted on the testing support 31 via a second electric push rod 33. The position of the testing support 31 is adjusted and tested by the rotation of several driven rollers 35, a first control roller 36, and a second control roller 37.

[0050] Furthermore, the stretching drive mechanism includes a guide plate 42 for guiding the movement of the third moving plate 44 and a bidirectional lead screw 43 for movement control. The bidirectional lead screw 43 is rotatably connected to the base plate 1, the guide plate 42 is fixedly installed on the base plate 1, the third moving plate 44 is slidably connected to the base plate 1 through the guide plate 42, and the third moving plate 44 is threadedly connected to the bidirectional lead screw 43.

[0051] Furthermore, the tension drive mechanism also includes a fourth motor 47 for driving the bidirectional lead screw 43 to rotate. A worm gear 45 is fixedly connected to the bidirectional lead screw 43, and a worm 46 is meshed on the worm gear 45. The worm 46 is rotatably connected to the inside of the base plate 1. The worm 46 is fixedly connected to the output shaft of the fourth motor 47, and the fourth motor 47 is fixedly installed inside the base plate 1.

[0052] Furthermore, the detection mechanism also includes a transmission belt 34, a second shift plate 41, and a first shift plate 40 for driving the detection support 31 to move and adjust. The detection support 31 is slidably connected to the second shift plate 41, the second shift plate 41 is slidably connected to the first shift plate 40, and the first shift plate 40 is slidably connected to the third shift plate 44. The transmission belt 34 is drivenly connected to the driven roller 35, the first control roller 36, and the second control roller 37, and the detection support 31 is fixedly connected to the transmission belt 34. The first control roller 36 is fixedly connected to the output shaft of the second motor 38, and the second control roller 37 is fixedly connected to the output shaft of the third motor 39. The second motor 38 and the third motor 39 are both fixedly mounted on the first shift plate 40.

[0053] Preferably, in this embodiment, when the film 2 is driven to the range to be tested, the film 2 is in a taut state due to the tension adjustment of the tension roller 30. At this time, the fourth motor 47 drives the worm 46 to rotate. Under the meshing connection between the worm 46 and the worm wheel 45, the bidirectional lead screw 43 is driven to rotate. At this time, under the guidance of the guide slide plate 42 and the control of the threaded connection of the bidirectional lead screw 43, the third moving plate 44 moves away from each other, thereby completing the stretching treatment of both ends of the film 2. This well simulates the bidirectional force state in the actual processing process, and the detection effect is good. Moreover, when it is necessary to detect the unidirectional force state of the film 2, the rotation and start / stop of the first motor 12 on the moving plate 4 can be adjusted, that is, the film roller 3 at one end is controlled to rotate, and the other end is clamped. This can correspondingly complete the detection treatment of the unidirectional force state of the film 2. The detection range is wide and it is convenient for detection.

[0054] Furthermore, based on the position to be measured during the stretching of the film 2, i.e., when adjusting the detection position of the detection head 32, the second motor 38 drives the first control roller 36 to rotate, and the third motor 39 drives the second control roller 37 to rotate. When the first control roller 36 and the second control roller 37 rotate in opposite directions, the second moving plate 41 can drive the detection head 32 to move and connect to the first moving plate 40. When the first control roller 36 and the second control roller 37 rotate in the same direction, the second moving plate 41 no longer moves. At this time, the detection support 31 drives the detection head 32 to move and connect to the second moving plate 41 for adjustment. When one of the first control roller 36 and the second control roller 37 rotates and the other no longer rotates, the detection head 32 on the detection support 31 can be controlled to move forward, backward, left, and right accordingly. The detection range is wide, and there is no need for manual adjustment and detection multiple times, which significantly improves the detection efficiency.

[0055] By setting an automatic adjustment detection method for the position of the detection head 32, when detecting polypropylene films of different specifications, there is no need to manually adjust the position of the detection head 32. The automatic adjustment detection mechanism can quickly move the detection head 32 to the appropriate position according to the specification information of the film 2, which greatly shortens the detection preparation time. When continuously detecting different batches and different specifications of films 2, the continuity and efficiency of the detection can be significantly improved. Compared with the traditional detection method, the overall detection efficiency can be significantly improved, effectively meeting the detection needs of large-scale production. The automatic adjustment function of the detection head 32 position reduces manual intervention. The operator only needs to place the film 2 on the detection equipment and start the detection program. There is no need to frequently manually adjust the position of the detection head, which reduces the workload and difficulty of the operator and significantly improves the work efficiency.

[0056] It should be noted that the components in this application are all general standard parts or parts known to those skilled in the art, which effectively solve the technical problems raised in the background art.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polypropylene film stretch detection apparatus comprising a base plate (1), characterized in that, The third moving plate (44) is movably connected to the bottom plate (1), and a film roller (3) for conveying the film (2) is arranged on the third moving plate (44). The positioning and rotating clamping mechanism is installed on the third moving plate (44) and is used for positioning and rotating and clamping the control film roller (3) for stretching, and the positioning and rotating clamping mechanism comprises a first butt joint pipe (7) and a second butt joint pipe (8) for positioning the installation of the film roller (3), and the first butt joint pipe (7) and the second butt joint pipe (8) are rotatably installed on the moving vertical plate (4), and the outer sides of the first butt joint pipe (7) and the second butt joint pipe (8) are provided with a first clamping plate (13) and a second clamping plate (14) for positioning and clamping. The stretching driving mechanism is installed at the connection between the third moving plate (44) and the bottom plate (1) and is used for driving the film (2) on the third moving plate (44) to perform stretching detection. The detection mechanism is installed on the third moving plate (44) and is used for detecting the range of the stretched film (2), and the detection mechanism comprises a detection head (32) for detection and a detection support seat (31), the detection head (32) is installed on the detection support seat (31) through a second electric push rod (33), and the detection support seat (31) is adjusted and detected in position through the rotation of a plurality of driven rollers (35), a first control roller (36) and a second control roller (37).

2. The polypropylene film stretch detection apparatus according to claim 1, wherein, The positioning and rotating clamping mechanism further comprises a first motor (12) for driving the rotation of the film roller (3), the two ends of the film roller (3) are provided with square mounting blocks (6), the first butt joint pipe (7) and the second butt joint pipe (8) are provided with square grooves (9) matched with the square mounting blocks (6), the second butt joint pipe (8) is fixedly connected with a first gear (10), the first gear (10) is engagedly connected with a second gear (11), the second gear (11) is fixedly connected with the output shaft of the first motor (12), and the first motor (12) is fixedly installed on the moving vertical plate (4).

3. The polypropylene film stretch detection apparatus according to claim 2, wherein, The positioning and rotating clamping mechanism further comprises third and fourth gears (15) and (16) for driving the first and second clamping plates (13) and (14) to position and control the rotation of the film roller (3), one end of the first clamping plate (13) is fixedly connected with the third gear (15), one end of the second clamping plate (14) is fixedly connected with the fourth gear (16), the third gear (15) is engagedly connected with the fourth gear (16), the third gear (15) is rotatably connected to a support plate (24) through a first connecting shaft (17), the fourth gear (16) is rotatably connected to the support plate (24) through a second connecting shaft (18), and the support plate (24) is fixedly installed on the third moving plate (44). The positioning and rotating clamping mechanism further comprises third and fourth gears (15) and (16) for driving the first and second clamping plates (13) and (14) to position and control the rotation of the film roller (3), one end of the first clamping plate (13) is fixedly connected with the third gear (15), one end of the second clamping plate (14) is fixedly connected with the fourth gear (16), the third gear (15) is engagedly connected with the fourth gear (16), the third gear (15) is rotatably connected to a support plate (24) through a first connecting shaft (17), the fourth gear (16) is rotatably connected to the support plate (24) through a second connecting shaft (18), and the support plate (24) is fixedly installed on the third moving plate (44).

4. The polypropylene film stretch detection apparatus according to claim 3, wherein The positioning rotary clamping mechanism further comprises a second wedge (25) and a first wedge (21) for driving the first clamping plate (13) and the second clamping plate (14) to perform clamping control, the first wedge (21) is fixedly connected to one end of a traction block (20), the traction block (20) is rotatably connected to one end of the first clamping plate (13) through a traction rod (19), the inside of a support plate (24) is provided with a fixed plate (23), the connection between the first clamping plate (13) and the fixed plate (23) is provided with a spring (22), one side of the first wedge (21) is slidably connected with the second wedge (25), the second wedge (25) is fixedly connected with the piston rod of a second bidirectional push rod (26), and the outside of the second bidirectional push rod (26) is provided with a protective cover (27) for protection.

5. The polypropylene film stretch detection apparatus according to claim 4, wherein, The positioning rotary clamping mechanism further comprises a first bidirectional push rod (5) for driving the moving vertical plate (4) to perform moving connection, the moving vertical plate (4) is limitingly and slidably connected to a third moving plate (44), and the moving vertical plate (4) is fixedly connected with the piston rod of the first bidirectional push rod (5), and the first bidirectional push rod (5) is fixedly installed on the third moving plate (44).

6. The polypropylene film stretch detection apparatus according to claim 5, wherein One side of the film roller (3) is provided with a tensioning roller (30) for tensioning adjustment, the tensioning roller (30) is fixedly connected with the piston rod of a first electric push rod (29), the first electric push rod (29) is fixedly installed on a support frame (28), and the support frame (28) is fixedly installed on the third moving plate (44).

7. The polypropylene film stretch detection apparatus according to claim 1, wherein The detection mechanism further comprises a transmission belt (34), a second moving plate (41) and a first moving plate (40) for driving the detection support seat (31) to perform moving adjustment, the detection support seat (31) is limitingly and slidably connected to the second moving plate (41), the second moving plate (41) is limitingly and slidably connected to the first moving plate (40), the first moving plate (40) is limitingly and slidably connected to the third moving plate (44), the transmission belt (34) is drivingly connected to a driven roller (35), a first control roller (36) and a second control roller (37), and the detection support seat (31) is fixedly connected to the transmission belt (34), the first control roller (36) is fixedly connected to the output shaft of a second motor (38), the second control roller (37) is fixedly connected to the output shaft of a third motor (39), and the second motor (38) and the third motor (39) are both fixedly installed on the first moving plate (40).

8. The polypropylene film stretch detection apparatus of claim 1, wherein, The stretching driving mechanism comprises a guide sliding plate (42) for driving the third moving plate (44) to move and guide and a bidirectional screw rod (43) for moving control, the bidirectional screw rod (43) is rotatably connected to the bottom plate (1), the guide sliding plate (42) is fixedly installed on the bottom plate (1), the third moving plate (44) is limitingly and slidably connected to the bottom plate (1) through the guide sliding plate (42), and the third moving plate (44) is screwedly connected to the bidirectional screw rod (43).

9. The polypropylene film stretch detection apparatus according to claim 8, wherein, The stretching driving mechanism further comprises a fourth motor (47) for driving the bidirectional screw rod (43) to rotate, the bidirectional screw rod (43) is fixedly connected with a worm gear (45), the worm gear (45) is meshingly connected with a worm (46), the worm (46) is rotatably connected to the inside of the bottom plate (1), the worm (46) is fixedly connected with the output shaft of the fourth motor (47), and the fourth motor (47) is fixedly installed in the inside of the bottom plate (1).

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