Polypropylene film strength detection device

Abstract

The invention relates to the technical field of detection, in particular to a polypropylene film strength detection device. The polypropylene film strength detection device provided by the invention can be used for extruding a film and detecting the impact resistance of the film when the film is stretched to detect the toughness of the film, so that the performance detection of the film is more in place. A polypropylene film strength detection device comprises a detection table, fixing cylinders, knobs, a stretching mechanism and an extrusion mechanism, the left side and the right side of the upper portion of the detection table are rotationally connected with the fixing cylinders, the front sides of the fixing cylinders are connected with the knobs, the stretching mechanism is arranged on the detection table, and the extrusion mechanism is arranged at the top of the detection table. The stretching mechanism is arranged, the surface of a polypropylene film is stretched, and toughness stretching detection of the polypropylene film is achieved; the extrusion mechanism is arranged, the upper surface of the polypropylene film is extruded when the polypropylene film is stretched, the impact resistance of the polypropylene film can be detected, the strength of the polypropylene film can be better detected, and the quality of the polypropylene film is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of detection technology, and in particular to a polypropylene film strength detection device. Background Art

[0002] Films made of polypropylene are generally used for packaging and coating layers. Nowadays, plastic packaging is more and more widely used, but the quality of the films is uneven, which affects people's daily use and brings inconvenience to people. Therefore, it is necessary to conduct strength testing on the produced films.

[0003] The patent with the public patent number CN217443030U discloses a strength detection device for polyethylene film production, including a support frame, an adjustment device located in the support frame and two clamping devices respectively located at both ends of the adjustment device, the clamping device includes a bottom roller, a lifting roller placed parallel to the bottom roller and two connecting mechanisms located at both ends of the bottom roller and the lifting roller, the connecting mechanism includes a bottom plate and a top plate located above the bottom plate, a tubular motor with an outer wall having a threaded structure is arranged on the side surface of the bottom plate, the tubular motor thread passes through the threaded hole of the top plate, the two ends of the main shaft of the bottom roller are respectively inserted into the bottom plate, and the two ends of the rotating shaft of the lifting roller are respectively inserted into the top plate.

[0004] When the above device is in use, it can only test the strength of the film by stretching, so that the performance test of the film is not in place. Now, a polypropylene film strength testing device is developed, which can squeeze the film to test its impact resistance while stretching the film to test its toughness, so that the performance test of the film can be more in place, so as to solve the above problem. Summary of the invention

[0005] In order to overcome the shortcoming of the prior art that the strength of the film can only be tested by stretching, which makes it impossible to fully test the performance of the film, the purpose of the present invention is to provide a polypropylene film strength testing device which can extrude the film to test its impact resistance while stretching the film to test its toughness, so that the performance of the film can be more fully tested.

[0006] A polypropylene film strength detection device, comprising: The detection table and the fixed cylinder, the upper left and right sides of the detection table are rotatably connected with the fixed cylinder; The knob is connected to the front side of the fixed tube; Stretching mechanism: the testing table is provided with a stretching mechanism; Squeezing mechanism: A squeezing mechanism is provided on the top of the testing table.

[0007] As a further preferred embodiment, the stretching mechanism includes: A wedge-shaped frame is connected to the middle of the rear side of the top of the testing table; A fixed frame is connected to the middle of the upper rear part of the detection table; A first support frame, the rear side of the lower part of the fixed frame is connected to the first support frame; Motor: a motor is installed at the lower part of the first support frame; A lead screw, the output shaft of the motor is connected with the lead screw, and the lead screw is located inside the fixed frame; A first guide frame, the fixed frame is slidably connected to the first guide frame, and the first guide frame is in slidable contact with the lead screw; A first sliding frame, wherein both left and right sides of the first guide frame are slidably connected with the first sliding frame, and the first sliding frame is in slidable contact with the wedge frame; A first telescopic spring, wherein the two first sliding frames are connected with a first telescopic spring; The roller and the front side of the first sliding frame are rotatably connected with the roller, and the roller is movably connected with the wedge frame.

[0008] As a further preferred embodiment, the extrusion mechanism includes: A second support frame, a second support frame is connected to the rear side of the top of the detection table; A first extrusion frame, wherein the upper portion of the second support frame is slidably connected to the first extrusion frame; A second telescopic spring is wound around the outside of both left and right sides of the first extrusion frame, and two ends of the second telescopic spring are respectively connected to the second support frame and the first extrusion frame.

[0009] As a further preferred solution, a synchronization mechanism is also included, and the synchronization mechanism includes: A third support frame, a third support frame is connected to the middle of the top of the wedge-shaped frame; A bevel gear set, with the top of the screw rod connected to the bevel gear set; A rotating shaft, a rotating shaft is connected to the front side of the bevel gear set, and the rotating shaft is in rotational contact with the third support frame; A cam is connected to the front side of the rotating shaft, and the cam is in extrusion contact with the first extrusion frame when the cam moves.

[0010] As a further preferred embodiment, a blowing mechanism is also included, and the blowing mechanism includes: A fourth support frame is connected to the middle of the upper part of the detection table; An air cylinder is installed on the fourth support frame; The air jet port is connected to the top of the gas cylinder and runs through the middle of the top of the testing table; A second extrusion frame is slidably connected to the rear lower part of the gas cylinder; A third telescopic spring, wherein a third telescopic spring is connected between the second extrusion frame and the gas cylinder; The third extrusion frame is connected to the lower part of the screw rod, and the third extrusion frame is in extrusion contact with the second extrusion frame when the third extrusion frame rotates.

[0011] As a further preferred embodiment, a heating mechanism is also included, and the heating mechanism includes: A second guide frame, the rear side of the lower part of the fixed frame is connected to the second guide frame; A second sliding frame, with the second guide frame being slidably connected to the left and right sides thereof; A fourth telescopic spring, wherein a fourth telescopic spring is connected between the two second sliding frames; A heating rod is connected to the front side of the second sliding frame; The fourth extrusion frame is connected to the left and right sides of the first guide frame, and the fourth extrusion frame is in extrusion contact with the heating rod when moving.

[0012] As a further preferred solution, a pressing mechanism is also included, and the pressing mechanism includes: A fixing plate, the front side of the lower part of the first guide frame is connected with a fixing plate; A telescopic component is connected in the middle of the fixed plate; A third guide frame, a third guide frame is connected to the middle of the front side of the top of the fixed plate; A fifth telescopic spring, wherein a fifth telescopic spring is connected between the third guide frame and the fixed plate; A pressing frame is slidably connected to the third guide frame; The telescopic ends on both sides of the telescopic assembly are connected to the limit frames, and when the telescopic assembly is retracted, the limit frames are clamped on the top pressure frame.

[0013] As a further preferred embodiment, the extrusion mechanism further comprises: A handle is connected to the middle of the front side of the upper part of the first extrusion frame.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention is provided with a stretching mechanism, which realizes the toughness stretching test of the polypropylene film by stretching the surface of the polypropylene film; and an extrusion mechanism is provided, which extrudes the upper surface of the polypropylene film when the polypropylene film is stretched, so as to detect the impact resistance of the polypropylene film, and can better detect the strength of the polypropylene film to ensure its quality.

[0015] 2. The present invention is provided with a synchronous mechanism, which realizes the action of stretching the polypropylene film while squeezing its upper surface, thereby improving the detection efficiency.

[0016] 3. The present invention is provided with an air blowing mechanism, and the air tightness of the polypropylene film is detected by blowing air on the surface of the polypropylene film.

[0017] 4. The present invention is provided with a heating mechanism, and the heat resistance test of the polypropylene film during stretching is realized by heating the edge of the polypropylene film for testing.

[0018] 5. The present invention is provided with a pressing mechanism to further press the polypropylene film when it is stretched, thereby realizing the detection of the tear resistance of the polypropylene film when it is stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the detection table etc. of the present invention.

[0021] Figure 3 It is a schematic diagram of the first three-dimensional structure of the stretching mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of a second cross-sectional three-dimensional structure of the stretching mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the extrusion mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the first three-dimensional structure of the synchronization mechanism of the present invention.

[0025] Figure 7 It is a schematic diagram of the second three-dimensional structure of the synchronization mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the first three-dimensional structure of the blowing mechanism of the present invention.

[0027] Fig. 9 It is a schematic diagram of the second three-dimensional structure of the blowing mechanism of the present invention.

[0028] Fig.10 It is a schematic diagram of the first three-dimensional structure of the heating mechanism of the present invention.

[0029] Fig.11 It is a schematic diagram of a second cross-sectional three-dimensional structure of the heating mechanism of the present invention.

[0030] Fig.12 It is a schematic diagram of the first three-dimensional structure of the pressing mechanism of the present invention.

[0031] Fig.13 It is a schematic diagram of the second three-dimensional structure of the pressing mechanism of the present invention.

[0032] Fig.14 It is a schematic diagram of the third three-dimensional structure of the pressing mechanism of the present invention.

[0033] The markings of the components in the accompanying drawings are as follows: 1. Testing table, 11. Fixed cylinder, 12. Knob, 2. Stretching mechanism, 21. Motor, 22. First support frame, 23. Screw, 24. First guide frame, 25. Fixed frame, 26. Roller, 27. First sliding frame, 28. First telescopic spring, 29. Wedge frame, 3. Extrusion mechanism, 31. Second support frame, 32. First extrusion frame, 33. Second telescopic spring, 34. Handle, 4. Synchronous mechanism, 41. Bevel gear set, 42. Rotating shaft, 43. Cam, 44, third support frame, 5, blowing mechanism, 51, air cylinder, 52, fourth support frame, 53, second extrusion frame, 54, third telescopic spring, 55, air jet, 56, third extrusion frame, 6, heating mechanism, 61, second guide frame, 62, second sliding frame, 63, heating rod, 64, fourth telescopic spring, 65, fourth extrusion frame, 7, pressing mechanism, 71, fixed plate, 72, telescopic assembly, 73, limiting frame, 74, pressing frame, 75, third guide frame, 76, fifth telescopic spring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: A polypropylene film strength detection device, such as Figure 1-5 As shown, it includes a detection table 1, a fixed cylinder 11, a knob 12, a stretching mechanism 2 and a squeezing mechanism 3. The fixed cylinder 11 is rotatably connected to the left and right sides of the upper part of the detection table 1, and the front side of the fixed cylinder 11 is connected to the knob 12. The detection table 1 is provided with a stretching mechanism 2, and the top of the detection table 1 is provided with a squeezing mechanism 3.

[0036] like Figure 1-4As shown, the stretching mechanism 2 includes a motor 21, a first support frame 22, a screw 23, a first guide frame 24, a fixed frame 25, a roller 26, a first sliding frame 27, a first telescopic spring 28 and a wedge frame 29. The wedge frame 29 is connected to the middle of the top rear side of the detection table 1, the fixed frame 25 is connected to the middle of the upper rear side of the detection table 1, the lower rear side of the fixed frame 25 is connected to the first support frame 22, the motor 21 is installed at the lower part of the first support frame 22, and the output shaft of the motor 21 is connected to the screw 23 The screw rod 23 is located inside the fixed frame 25, and a first guide frame 24 is slidably connected to the fixed frame 25. The first guide frame 24 is in slidable contact with the screw rod 23. First sliding frames 27 are slidably connected to the left and right sides of the first guide frame 24. The first sliding frames 27 are in slidable contact with the wedge frame 29. A first telescopic spring 28 is connected between the two first sliding frames 27. The front sides of the first sliding frames 27 are rotatably connected to rollers 26, and the rollers 26 are movably connected to the wedge frame 29.

[0037] like Figure 1 and Figure 5 As shown, the extrusion mechanism 3 includes a second support frame 31, a first extrusion frame 32, a second telescopic spring 33 and a handle 34. The second support frame 31 is connected to the top rear side of the detection table 1, the first extrusion frame 32 is slidably connected to the upper part of the second support frame 31, and the handle 34 is connected to the middle of the upper front side of the first extrusion frame 32. The second telescopic spring 33 is wound around the left and right sides of the first extrusion frame 32, and the two ends of the second telescopic spring 33 are respectively connected to the second support frame 31 and the first extrusion frame 32.

[0038] When people use this device to test the strength of the polypropylene film, first place the polypropylene film between the fixed cylinder 11 and the roller 26, and fix the two sides of the polypropylene film by tightening the knob 12. Then, start the motor 21, and the output shaft of the motor 21 rotates to drive the screw rod 23 in the fixed frame 25 to rotate, so that the first guide frame 24 slides upward on the fixed frame 25, thereby driving the first sliding frame 27 to slide upward, and then driving the roller 26 to move upward. When the first sliding frame 27 contacts the wedge frame 29, the first sliding frame 27 continues to slide upward and squeezes the wedge frame 29, so that the first sliding frame 27 slides outward on the first guide frame 24, thereby driving the roller 26 to slide outward, and the first telescopic spring 28 is stretched, so that the roller 26 moves upward and outward, and the polypropylene film is stretched. After the test is completed, the motor 21 is reversed, and the output shaft of the motor 21 drives the screw rod 23 to reverse, so that the first guide frame 2 The first sliding frame 27 slides downward on the fixed frame 25, thereby driving the first sliding frame 27 to slide downward, and the first telescopic spring 28 gradually resets, driving the first sliding frame 27 to move downward and inward, thereby driving the roller 26 to move downward and inward, and the surface of the polypropylene film is no longer stretched. This mechanism realizes the stretching test of the polypropylene film by stretching the surface of the polypropylene film; when performing the stretching test, the handle 34 is manually pushed downward, and the handle 34 drives the first extrusion frame 32 to move downward, and the second telescopic spring 33 is compressed, so that the lower part of the first extrusion frame 32 squeezes the surface of the polypropylene film. After the extrusion is completed, the handle 34 is no longer pushed downward, and the second telescopic spring 33 drives the first extrusion frame 32 to slide upward and reset on the second support frame 31. This mechanism squeezes the upper surface of the polypropylene film when it is stretched, which can detect the impact resistance of the polypropylene film, and can better detect the strength of the polypropylene film to ensure its quality.

[0039] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 6 and Figure 7 As shown, it also includes a synchronization mechanism 4, which includes a bevel gear set 41, a rotating shaft 42, a cam 43 and a third support frame 44. The third support frame 44 is connected to the middle of the top of the wedge frame 29, the top of the screw rod 23 is connected to the bevel gear set 41, the front side of the bevel gear set 41 is connected to the rotating shaft 42, the rotating shaft 42 is in rotational contact with the third support frame 44, the front side of the rotating shaft 42 is connected to the cam 43, and the cam 43 is in extrusion contact with the first extrusion frame 32 when moving.

[0040] When the screw rod 23 rotates, it will drive the bevel gear set 41 to rotate, thereby driving the rotating shaft 42 on the third support frame 44 to rotate, and driving the cam 43 to rotate. When the raised part of the cam 43 contacts the first extrusion frame 32, the first extrusion frame 32 moves downward, the second telescopic spring 33 is compressed, and the lower part of the first extrusion frame 32 squeezes the upper surface of the polypropylene film. When the raised part of the cam 43 disengages from the first extrusion frame 32, due to the action of elastic force, the second telescopic spring 33 resets and drives the first extrusion frame 32 to move up and reset. This mechanism realizes the action of stretching the polypropylene film while squeezing its upper surface, thereby improving the detection efficiency.

[0041] like Figure 1 , Figure 8 and Fig. 9 As shown, it also includes a blowing mechanism 5, which includes an air cylinder 51, a fourth support frame 52, a second extrusion frame 53, a third telescopic spring 54, an air jet 55 and a third extrusion frame 56. The fourth support frame 52 is connected to the middle of the upper part of the detection table 1, and the air cylinder 51 is installed on the fourth support frame 52. The top of the air cylinder 51 is connected to the air jet 55, and the air jet 55 runs through the middle of the top of the detection table 1. The rear lower part of the air cylinder 51 is slidably connected to the second extrusion frame 53, and the third telescopic spring 54 is connected between the second extrusion frame 53 and the air cylinder 51. The lower part of the screw rod 23 is connected to the third extrusion frame 56, and the third extrusion frame 56 is in extrusion contact with the second extrusion frame 53 when it rotates.

[0042] When the screw rod 23 rotates, the third extrusion frame 56 is driven to rotate. When the two sides of the third extrusion frame 56 are in contact with the second extrusion frame 53, the second extrusion frame 53 moves forward and the third telescopic spring 54 is compressed, so that the gas inside the air cylinder 51 on the fourth support frame 52 is discharged through the air jet 55 to blow air onto the surface of the polypropylene film. When the two sides of the third extrusion frame 56 are separated from the second extrusion frame 53, the third telescopic spring 54 drives the second extrusion frame 53 to reset, and the gas inside the air cylinder 51 is no longer ejected. The screw rod 23 continues to rotate, and the two sides of the third extrusion frame 56 are continuously squeezed and separated from the second extrusion frame 53. Each time the third extrusion frame 56 is squeezed, the second extrusion frame 53 squeezes the inside of the air cylinder 51 once, and the gas is discharged once through the air jet 55. This mechanism realizes the detection of the air tightness of the polypropylene film by blowing air onto the surface of the polypropylene film.

[0043] like Figure 1 , Fig.10 and Fig.11As shown, a heating mechanism 6 is also included, and the heating mechanism 6 includes a second guide frame 61, a second sliding frame 62, a heating rod 63, a fourth telescopic spring 64 and a fourth extrusion frame 65. The second guide frame 61 is connected to the rear side of the lower part of the fixed frame 25, and the second sliding frames 62 are slidably connected to the left and right sides of the second guide frame 61. A fourth telescopic spring 64 is connected between the two second sliding frames 62, and the heating rod 63 is connected to the front side of the second sliding frames 62. The fourth extrusion frame 65 is connected to the left and right sides of the first guide frame 24. When the fourth extrusion frame 65 moves, it is squeezed and contacted with the heating rod 63.

[0044] When the first guide frame 24 moves upward, it drives the fourth extrusion frame 65 to move upward. When the fourth extrusion frame 65 contacts the heating rod 63, the fourth extrusion frame 65 continues to move upward to squeeze the heating rod 63, so that the heating rod 63 moves inward on the surface of the polypropylene film, driving the second sliding frame 62 to slide inward on the second guide frame 61, and the fourth telescopic spring 64 is compressed. When the first guide frame 24 moves downward, it drives the fourth extrusion frame 65 to move downward. When the fourth extrusion frame 65 is separated from the heating rod 63, due to the left and right elastic force, the fourth telescopic spring 64 drives the second sliding frame 62 to move outward and reset on the second guide frame 61, thereby driving the heating rod 63 to move outward and reset. This mechanism realizes the heat resistance detection of the polypropylene film during stretching by performing heating detection on the edge stretching of the polypropylene film.

[0045] like Figure 1 , Fig.12 , Fig.13 and Fig.14 As shown, it also includes a pressing mechanism 7, which includes a fixed plate 71, a telescopic assembly 72, a limit frame 73, a pressing frame 74, a third guide frame 75 and a fifth telescopic spring 76. The front side of the lower part of the first guide frame 24 is connected to the fixed plate 71, the telescopic assembly 72 is connected in the middle of the fixed plate 71, the third guide frame 75 is connected in the middle of the front side of the top of the fixed plate 71, and the fifth telescopic spring 76 is connected between the third guide frame 75 and the fixed plate 71. The third guide frame 75 is slidably connected to the pressing frame 74, and the telescopic ends on the left and right sides of the telescopic assembly 72 are connected to the limit frame 73. When the telescopic assembly 72 is contracted, the limit frame 73 is clamped with the pressing frame 74.

[0046] When the first guide frame 24 moves upward, it will drive the fixing plate 71 to move upward, thereby driving the telescopic assembly 72 and the third guide frame 75 to move upward. When the telescopic ends on the left and right sides of the telescopic assembly 72 are separated from the wedge-shaped frame 29, the telescopic ends of the telescopic assembly 72 are extended, driving the limiting frame 73 to move outward. When the limiting frame 73 is separated from the top pressure frame 74, the fifth telescopic spring 76 in the compressed state is reset, driving the top pressure frame 74 to slide upward on the third guide frame 75, so that the top pressure frame 74 hits the lower surface of the polypropylene film. When a guide frame 24 moves downward, it will drive the fixed plate 71 to move downward, thereby driving the telescopic assembly 72 and the third guide frame 75 to move downward. When the telescopic ends on the left and right sides of the telescopic assembly 72 are in contact with the wedge frame 29, the telescopic ends of the telescopic assembly 72 contract, driving the limit frame 73 to move inward, and the top pressure frame 74 is manually pressed downward. The fifth telescopic spring 76 is compressed, and the top pressure frame 74 is clamped with the limit frame 73. This mechanism further presses the polypropylene film when it is stretched, thereby realizing the detection of the tear resistance of the polypropylene film when it is stretched.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A polypropylene film strength detection device, comprising: A detection table (1) and a fixed cylinder (11), wherein the upper left and right sides of the detection table (1) are rotatably connected to the fixed cylinder (11); The knob (12) is connected to the front side of the fixed tube (11); A stretching mechanism (2), wherein the testing table (1) is provided with a stretching mechanism (2); A squeezing mechanism (3) is provided on the top of the detection table (1).

2. A polypropylene film strength detection device as claimed in claim 1, characterized in that: The stretching mechanism (2) comprises: A wedge-shaped frame (29), the wedge-shaped frame (29) being connected to the middle of the top rear side of the detection table (1); A fixed frame (25), the fixed frame (25) being connected to the middle of the upper rear portion of the detection table (1); A first support frame (22), the lower rear side of the fixed frame (25) being connected to the first support frame (22); A motor (21), wherein the motor (21) is mounted on the lower part of the first support frame (22); A screw rod (23), the output shaft of the motor (21) is connected to the screw rod (23), and the screw rod (23) is located inside the fixed frame (25); A first guide frame (24), the fixed frame (25) being slidably connected to the first guide frame (24), the first guide frame (24) being in slidable contact with the screw rod (23); A first sliding frame (27), wherein both left and right sides of the first guide frame (24) are slidably connected to the first sliding frame (27), and the first sliding frame (27) is in slidable contact with the wedge frame (29); A first telescopic spring (28), wherein the first telescopic spring (28) is connected between the two first sliding frames (27); The roller (26) and the front side of the first sliding frame (27) are both rotatably connected to the roller (26), and the roller (26) is movably connected to the wedge frame (29).

3. A polypropylene film strength detection device as claimed in claim 2, characterized in that: The extrusion mechanism (3) comprises: A second support frame (31), the top rear side of the detection table (1) being connected to the second support frame (31); A first extrusion frame (32), the upper portion of the second support frame (31) being slidably connected to the first extrusion frame (32); A second telescopic spring (33) is wound around the outside of both left and right sides of the first extrusion frame (32), and two ends of the second telescopic spring (33) are respectively connected to the second support frame (31) and the first extrusion frame (32).

4. A polypropylene film strength detection device as claimed in claim 3, characterized in that: The invention also includes a synchronization mechanism (4), wherein the synchronization mechanism (4) includes: A third support frame (44), the middle of the top of the wedge-shaped frame (29) being connected to the third support frame (44); A bevel gear set (41), the top of the screw rod (23) is connected to the bevel gear set (41); A rotating shaft (42), the front side of the bevel gear set (41) is connected to the rotating shaft (42), and the rotating shaft (42) is in rotational contact with the third support frame (44); A cam (43) is connected to the front side of the rotating shaft (42), and the cam (43) is in extrusion contact with the first extrusion frame (32) when the cam (43) moves.

5. A polypropylene film strength detection device as claimed in claim 4, characterized in that: It also includes an air blowing mechanism (5), which includes: A fourth support frame (52), the middle of the upper part of the detection table (1) being connected with a fourth support frame (52); An air cylinder (51), the air cylinder (51) being mounted on the fourth support frame (52); An air jet (55), the top of the air cylinder (51) is connected with the air jet (55), and the air jet (55) runs through the middle of the top of the detection table (1); A second extrusion frame (53), the rear lower portion of the air cylinder (51) being slidably connected to the second extrusion frame (53); A third telescopic spring (54), wherein the third telescopic spring (54) is connected between the second extrusion frame (53) and the air cylinder (51); A third extrusion frame (56) is connected to the lower portion of the screw rod (23). The third extrusion frame (56) is in extrusion contact with the second extrusion frame (53) when the third extrusion frame (56) rotates.

6. A polypropylene film strength detection device as claimed in claim 5, characterized in that: The device further comprises a heating mechanism (6), wherein the heating mechanism (6) comprises: A second guide frame (61), the lower rear side of the fixed frame (25) being connected to the second guide frame (61); A second sliding frame (62), with the second sliding frame (62) being slidably connected to both left and right sides of the second guide frame (61); A fourth telescopic spring (64), wherein the fourth telescopic spring (64) is connected between the two second sliding frames (62); A heating rod (63), the front side of the second sliding frame (62) is connected to the heating rod (63); A fourth extrusion frame (65) is connected to both left and right sides of the first guide frame (24). The fourth extrusion frame (65) is in extrusion contact with the heating rod (63) when moving.

7. A polypropylene film strength detection device as claimed in claim 6, characterized in that: It also includes a pressing mechanism (7), which includes: A fixing plate (71), the fixing plate (71) being connected to the front side of the lower portion of the first guide frame (24); A telescopic component (72), wherein the fixed plate (71) is connected with the telescopic component (72); A third guide frame (75), the third guide frame (75) being connected to the middle of the top front side of the fixing plate (71); A fifth telescopic spring (76), wherein a fifth telescopic spring (76) is connected between the third guide frame (75) and the fixed plate (71); A pressing frame (74), the third guide frame (75) being slidably connected to the pressing frame (74); The limiting frame (73) is connected to the telescopic ends on both sides of the telescopic assembly (72). When the telescopic assembly (72) is retracted, the limiting frame (73) is clamped to the top pressure frame (74).

8. A polypropylene film strength detection device as claimed in claim 7, characterized in that: The extrusion mechanism (3) further comprises: A handle (34) is connected to the middle of the upper front side of the first extrusion frame (32).

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