A POF heat shrink film performance detection device and its use method

Abstract

The application relates to the field of POF heat shrinkable film performance detection, and discloses a POF heat shrinkable film performance detection device and a use method thereof, which comprises a driving component, a fixed clamping piece is symmetrically and slidably installed on the outer surface of the middle part of the driving component, a movable clamping piece is slidably installed on the outer surface of one end of the fixed clamping piece, and an extrusion frame is movably installed on the upper part of the driving component and located on the outer surface of the top of the fixed clamping piece. The fixed clamping piece and the movable clamping piece are matched to clamp the POF heat shrinkable film to be detected, and the fixed clamping piece can perform pre-limiting on the POF heat shrinkable film before clamping. Through the matched operation of the fixed clamping piece, the movable clamping piece, the extrusion frame and the driving component, automatic stretching detection of the POF heat shrinkable film can be realized, and the POF heat shrinkable film after detection can be automatically discharged.

Description

Technical Field

[0001] The present invention relates to the field of POF heat shrinkable film performance detection, and in particular to a POF heat shrinkable film performance detection device and a use method thereof. Background Art

[0002] With the rapid development of the packaging industry, POF heat-shrinkable film, thanks to its excellent flexibility, transparency, and environmentally friendly properties, is widely used in the packaging of food, medicine, daily necessities, and other products. Its performance indicators, such as shrinkage and tensile strength, directly affect packaging effectiveness and product transportation safety, making performance testing an essential and critical step in the production process.

[0003] The POF heat shrink film tensile strength performance testing devices currently on the market have significant operational shortcomings. During operation, not only does the POF heat shrink film need to be clamped and fixed manually, but after the test, the tested POF heat shrink film samples have to be cleaned manually one by one. This traditional operation mode makes it impossible for the device to automatically tighten and clamp the POF heat shrink film, and it is even more impossible to automatically discharge and remove the samples after the test is completed. Therefore, the existing device has a low degree of automation, which not only limits the improvement of test efficiency and increases labor costs, but may also affect the accuracy of test data due to human operation errors, making it difficult to meet the large-scale, high-precision modern production testing needs. Summary of the Invention

[0004] The purpose of the present invention is to provide a POF heat shrink film performance detection device and its use method to solve the following technical problems: how to realize automatic stretching detection of POF heat shrink film and automatically discharge the detected POF heat shrink film.

[0005] The objectives of the present invention can be achieved by the following technical solution: a POF heat shrink film performance testing device, comprising a driving component, a fixed clamping member symmetrically and slidably mounted on the outer surface of the middle portion of the driving component, a movable clamping member slidably mounted on the outer surface of one end of the fixed clamping member, and an extrusion frame movably mounted on the outer surface of the upper portion of the driving component and located on the top of the fixed clamping member;

[0006] The fixed clamping member cooperates with the dynamic clamping member to clamp the POF heat shrink film that needs to be tested. At the same time, the fixed clamping member can pre-limit the POF heat shrink film before clamping, and after the test, the fixed clamping member cooperates with the dynamic clamping member to automatically release the POF heat shrink film;

[0007] The dynamic clamping member is driven by the extrusion frame to approach the fixed clamping member to clamp the POF heat shrink film;

[0008] The extrusion frame is used to squeeze the dynamic clamping member so that the dynamic clamping member slides close to the fixed clamping member;

[0009] The driving component is used for driving the fixed clamping piece, the movable clamping piece and the extrusion frame, and limiting the sliding of the fixed clamping piece, the movable clamping piece and the extrusion frame.

[0010] As a preferred scheme of the present application, the fixed clamping piece comprises a connecting plate, a vertical rod is arranged on the connecting plate, an end surface of the connecting plate is provided with a fixed clamping head, and a threaded hole is arranged on the outer surface of the connecting plate away from the end of the fixed clamping head.

[0011] A groove is arranged on the bottom of the outer surface of the fixed clamping head, a wedge-shaped rotating plate is rotatably arranged in the groove, torsion springs are fixedly sleeved on the outer surfaces of the two ends of the wedge-shaped rotating plate, a rotating shaft is rotatably connected to the top of the fixed clamping head, chain wheels are fixedly arranged on the outer surfaces of the two ends of the rotating shaft and the two ends of the wedge-shaped rotating plate.

[0012] Gears are rotatably sleeved on the outer surfaces of the two ends of the rotating shaft and located at the edges of the chain wheels, ratchets are welded on the sides of the gears, ratchets that are engaged with the ratchets are rotatably connected to the two ends of the rotating shaft, extrusion springs connected with the rotating shaft are fixedly connected to the upper surfaces of the ratchets, and chains are engagedly sleeved on the outer surfaces of the chain wheels.

[0013] As a preferred scheme of the present application, the movable clamping piece comprises a sliding frame, a movable clamping head is arranged on one end of the sliding frame, lower wedge-shaped blocks are arranged on the outer surfaces of the two sides of the other end of the sliding frame, a limiting sleeve hole is arranged on the end surface of the sliding frame away from the movable clamping head, and a rack is arranged on the middle part of the sliding frame.

[0014] As a preferred scheme of the present application, upper wedge-shaped blocks are symmetrically welded on the bottom end of the extrusion frame, a second sleeve hole is arranged on the top outer surface of the extrusion frame, a middle wedge-shaped block is arranged on the middle outer surface of the extrusion frame, and a first sleeve hole is arranged on the top end of the middle wedge-shaped block.

[0015] As a preferred scheme of the present application, the driving component comprises a supporting base, a vertical column is arranged on the top center of the rear end of the supporting base, a collecting box is slidably inserted on the upper surface of the supporting base, a driving motor is fixedly arranged on the upper outer surface of the vertical column, and a vertical screw rod is fixedly connected to the bottom end of the driving motor.

[0016] A vertical slide is arranged on the outer surface of the vertical column, a triangular crossbar that is engaged with the vertical slide is threadedly connected to the outer surface of the vertical screw rod, a double-threaded rod is rotatably connected to the outer surface of the vertical column and located below the vertical screw rod, helical gears are fixedly arranged on the outer surfaces of the bottom end of the vertical screw rod and the middle part of the double-threaded rod, horizontal slide grooves are symmetrically arranged on the bottom outer surfaces of the vertical column, and a reset spring that is sleeved on the outer surface of the vertical screw rod is fixedly connected to the bottom shell of the driving motor.

[0017] As a preferred solution of the present invention: one end of the connecting plate is slidably connected to the column through a horizontal sliding groove, the sliding frame is slidably sleeved on the outer surface of the connecting plate through a limiting sleeve hole, the connecting plate is threadedly connected to the double-threaded rod through a threaded hole, and the sliding frame is meshed with the gear through the racks on both sides.

[0018] As a preferred solution of the present invention: the extrusion frame is slidably connected to the outer surface of the triangular cross frame through the second sleeve hole, the extrusion frame is slidably connected to the outer surface of the vertical pole through the first sleeve hole, the extrusion frame is abutted against the lower wedge block through the upper wedge block at the bottom end, the vertical threaded rod is rotatably connected to the double-threaded rod through the bevel gear, and the threads on the outer surfaces of both ends of the double-threaded rod are symmetrically arranged.

[0019] A POF heat shrink film performance testing device and a method for using the same, comprising:

[0020] Step 1: Place the two ends of the POF heat shrink film between two sets of fixed clamping heads and a dynamic clamping head, so that the wedge-shaped rotating plate can hold the POF heat shrink film.

[0021] Step 2: Start the drive motor to rotate and drive the triangular cross frame to rise, and at the same time drive the double-threaded rod to rotate. At the same time, the double-threaded rod will drive the outer surface connecting plates at both ends to move away from each other. The triangular cross frame rises and squeezes the lower wedge block through the squeezing frame, causing the sliding frame to slide horizontally on the outer surface of the connecting plate until the dynamic clamping head and the fixed clamping head clamp the POF heat shrink film;

[0022] Step 3: The two sets of dynamic clamping heads and fixed clamping heads clamp the POF heat shrink film and move them away from each other until the dynamic clamping heads and the fixed clamping heads clamp and break the POF heat shrink film, and the external detection equipment obtains the detection data;

[0023] Step 4: Control the drive motor to rotate in the reverse direction, so that the extrusion frame drops and resets. At the same time, the two sets of connecting plates will approach each other, and the sliding rack will drive the chain to rotate in the reverse direction through the gear. During the separation of the dynamic clamping head and the fixed clamping head, the wedge-shaped rotating plate will continue to deflect in the reverse direction until the POF heat shrink film inside falls unrestricted.

[0024] Beneficial effects of the present invention:

[0025] (1) The present invention can automatically clamp the POF heat shrink film during the detection process through the coordinated operation between the fixed clamping part, the dynamic clamping part, the extrusion frame and the driving part, thereby replacing manual operation, quickly fixing, and greatly reducing manpower input and operation time; in addition, after testing the tensile properties, the POF heat shrink film can be automatically discharged and removed, thereby making the processing of POF heat shrink film samples more efficient and orderly, reducing manual cleaning costs and labor intensity, and helping enterprises to achieve cost reduction and efficiency improvement. At the same time, the device can not only significantly improve the detection efficiency and meet the detection needs of large-scale production, but also meet modern production standards through intelligent operation, enhance the technical advantages of enterprises in market competition, and promote POF heat shrink film detection technology to a higher level;

[0026] (2) The present invention can realize automatic stretching detection of POF heat shrink film and automatically discharge the POF heat shrink film after detection through the coordinated operation of the fixed clamping member, the dynamic clamping member, the extrusion frame and the driving component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the structure of a POF heat shrink film performance testing device;

[0029] Figure 2 Schematic diagram of the fixed clamping part structure;

[0030] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0031] Figure 4 for Figure 2 A schematic diagram of the partially enlarged structure at point B in the middle;

[0032] Figure 5 Schematic diagram of the structure of the dynamic clamping member;

[0033] Figure 6 Schematic diagram of the extrusion frame structure;

[0034] Figure 7 Schematic diagram of the drive component structure.

[0035] Description of the drawings: 1. Fixed clamping member; 2. Dynamic clamping member; 3. Extrusion frame; 4. Driving member; 11. Connecting plate; 12. Threaded hole; 13. Vertical rod; 14. Fixed clamping head; 15. Ratchet; 16. Pawl; 17. Extrusion spring; 18. Rotating shaft; 19. Sprocket; 110. Chain; 111. Wedge-shaped rotating plate; 112. Torsion spring; 113. Groove; 114. Gear; 21. Sliding frame; 22. Lower wedge block ; 23. Limiting sleeve hole; 24. Rack; 25. Dynamic clamping head; 31. First sleeve hole; 32. Second sleeve hole; 33. Upper wedge block; 34. Middle wedge block; 41. Bevel gear; 42. Collection box; 43. Support base; 44. Double threaded rod; 45. Horizontal slide; 46. Column; 47. Vertical slide; 48. Drive motor; 49. Vertical threaded rod; 410. Triangular cross frame; 411. Return spring. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 7 As shown, the present invention is a POF heat shrink film performance testing device, comprising a driving component 4, a fixed clamping member 1 being symmetrically and slidably mounted on the outer surface of the middle portion of the driving component 4, a movable clamping member 2 being slidably mounted on the outer surface of one end of the fixed clamping member 1, and an extrusion frame 3 being movably mounted on the outer surface of the upper portion of the driving component 4 and located at the top of the fixed clamping member 1;

[0038] The fixed clamping member 1 cooperates with the dynamic clamping member 2 to clamp the POF heat shrink film that needs to be tested. At the same time, the fixed clamping member 1 can pre-limit the POF heat shrink film before clamping, and after the test, the fixed clamping member 1 cooperates with the dynamic clamping member 2 to automatically release the POF heat shrink film;

[0039] The dynamic clamping member 2 is driven by the extrusion frame 3 to approach the fixed clamping member 1 to clamp the POF heat shrink film;

[0040] The extrusion frame 3 is used to squeeze the movable clamping member 2 so that the movable clamping member 2 slides close to the fixed clamping member 1;

[0041] The driving component 4 is used to provide power for the operation of the fixed clamping member 1, the movable clamping member 2 and the extrusion frame 3, and to limit the sliding of the fixed clamping member 1, the movable clamping member 2 and the extrusion frame 3.

[0042] The fixed clamping member 1 includes a connecting plate 11, a vertical rod 13 is provided on the connecting plate 11, a fixed clamping head 14 is provided on one end surface of the connecting plate 11, and a threaded hole 12 is provided on the end of the outer surface of the connecting plate 11 away from the fixed clamping head 14;

[0043] A groove 113 is formed at the bottom of the outer surface of the fixed clamping head 14. A wedge-shaped rotating plate 111 is rotatably mounted inside the groove 113. Torsion springs 112 are fixedly sleeved on the outer surfaces of both ends of the inner side of the wedge-shaped rotating plate 111. A rotating shaft 18 is rotatably clamped on the top end of the inner side of the fixed clamping head 14. Sprockets 19 are fixedly mounted on both ends of the rotating shaft 18 and the outer surfaces of both ends of the wedge-shaped rotating plate 111.

[0044] Gears 114 are rotatably sleeved on the outer surfaces of both ends of the rotating shaft 18 and located on the edge of the sprocket 19. A ratchet 15 is welded to the side of the gear 114. A pawl 16 is rotatably engaged with the ratchet 15 on the outer surfaces of both ends of the rotating shaft 18. An extrusion spring 17 connected to the rotating shaft 18 is fixedly connected to the upper surface of the pawl 16. The chain 110 is meshed and sleeved on the outer surface of the sprocket 19.

[0045] The dynamic clamping member 2 includes a sliding frame 21, a dynamic clamping head 25 is provided at one end of the sliding frame 21, and lower wedge blocks 22 are provided on the outer surfaces of both sides of the other end of the sliding frame 21. A limiting sleeve hole 23 is provided on the end surface of the sliding frame 21 away from the dynamic clamping head 25, and racks 24 are provided on both sides of the middle part of the sliding frame 21.

[0046] An upper wedge block 33 is symmetrically welded to the bottom end of the extrusion frame 3, a second socket hole 32 is opened on the top outer surface of the extrusion frame 3, a middle wedge block 34 is set on the middle outer surface of the extrusion frame 3, and a first socket hole 31 is opened at one end of the top of the middle wedge block 34.

[0047] The driving component 4 includes a supporting base 43, a column 46 is provided at the center of the top rear end of the supporting base 43, a collection box 42 is slidably inserted into the upper surface of the supporting base 43, a driving motor 48 is fixedly mounted on the upper outer surface of the column 46, and a vertical threaded rod 49 is fixedly connected to the bottom end of the driving motor 48;

[0048] A vertical slide 47 is provided on the outer surface of the column 46, and the outer surface of the vertical threaded rod 49 is threadedly connected to a triangular cross frame 410 that is clamped to the vertical slide 47. The outer surface of the column 46 is rotatably clamped with a double-threaded rod 44 below the vertical threaded rod 49. The bottom end of the vertical threaded rod 49 and the middle outer surface of the double-threaded rod 44 are fixedly installed with a bevel gear 41. The outer surfaces of both sides of the bottom of the column 46 are symmetrically provided with horizontal slide grooves 45, and the bottom shell of the drive motor 48 is fixedly connected to a return spring 411 that is sleeved on the outer surface of the vertical threaded rod 49.

[0049] One end of the connecting plate 11 is slidably engaged with the column 46 through the horizontal sliding groove 45, which can limit the sliding of the connecting plate 11. The sliding frame 21 is slidably sleeved on the outer surface of the connecting plate 11 through the limiting sleeve hole 23, which can ensure the stability of the sliding frame 21 sliding on the outer surface of the connecting plate 11. The connecting plate 11 is threadedly connected to the double-threaded rod 44 through the threaded hole 12, and can control the reset sliding of the connecting plate 11 under the rotation of the double-threaded rod 44. The sliding frame 21 is meshed with the gear 114 through the racks 24 on both sides, and can control the forward and reverse rotation of the gear 114 when the sliding frame 21 slides.

[0050] The extrusion frame 3 is slidably sleeved on the outer surface of the triangular cross frame 410 through the second sleeve hole 32, and can drive the extrusion frame 3 to rise and fall when the triangular cross frame 410 rises and falls. The extrusion frame 3 is slidably sleeved on the outer surface of the vertical rod 13 through the first sleeve hole 31, which can ensure the stability of the extrusion frame 3 rising and falling. The extrusion frame 3 is abutted against the lower wedge block 22 through the upper wedge block 33 at the bottom end, and can squeeze the sliding frame 21 to slide on the outer surface of the connecting plate 11. The vertical threaded rod 49 is rotatably connected to the double-threaded rod 44 through the bevel gear 41, and can control the forward and reverse rotation of the double-threaded rod 44. The threads on the outer surfaces of both ends of the double-threaded rod 44 are symmetrically arranged, which can control the two groups of connecting plates 11 to slide synchronously in the opposite directions when the double-threaded rod 44 rotates.

[0051] A method for using a POF heat shrink film performance testing device, comprising:

[0052] Step 1: Place both ends of the POF heat shrink film between two sets of fixed clamping heads 14 and dynamic clamping heads 25, so that the wedge-shaped rotating plate 111 receives the POF heat shrink film.

[0053] Step 2: Start the drive motor 48 to rotate and drive the triangular cross frame 410 to rise, and at the same time drive the double-threaded rod 44 to rotate. At the same time, the double-threaded rod 44 will drive the outer surface connecting plates 11 at both ends to move away from each other. The triangular cross frame 410 rises and squeezes the lower wedge block 22 through the squeezing frame 3, causing the sliding frame 21 to slide laterally on the outer surface of the connecting plate 11 until the dynamic clamping head 25 and the fixed clamping head 14 clamp the POF heat shrink film;

[0054] Step 3: The two sets of dynamic clamping heads 25 and fixed clamping heads 14 clamp the POF heat shrink film and move them away from each other until the dynamic clamping heads 25 and fixed clamping heads 14 clamp and break the POF heat shrink film, and the external detection equipment can obtain the detection data;

[0055] Step 4: Control the drive motor 48 to rotate in the reverse direction, so that the extrusion frame 3 descends and resets. At the same time, the two sets of connecting plates 11 will approach each other, and the sliding rack 24 will drive the chain 110 to rotate in the reverse direction through the gear 114. During the separation process of the dynamic clamping head 25 and the fixed clamping head 14, the wedge-shaped rotating plate 111 will continue to deflect in the reverse direction until the POF heat shrink film inside falls unrestricted.

[0056] The working principle of the present invention is as follows: when the tensile strength performance of the POF heat shrink film needs to be tested, the two ends of the cut POF heat shrink film are first straightened, and the two sides of the middle of the POF heat shrink film are aligned with the bottom between the fixed clamping head 14 and the dynamic clamping head 25. Then, the POF heat shrink film is moved vertically upward, so that the POF heat shrink film rises and squeezes the wedge-shaped rotating plate 111 until the POF heat shrink film rises and separates from the wedge-shaped rotating plate 111. Then, the two ends of the POF heat shrink film are placed on the upper surface of the wedge-shaped rotating plate 111, so that the two sets of wedge-shaped rotating plates 111 can hold the POF heat shrink film and maintain stability.

[0057] Then the driving motor 48 is started to drive the vertical threaded rod 49 to rotate. When the vertical threaded rod 49 rotates forward, the triangular cross frame 410 is driven to rise, and the vertical threaded rod 49 drives the double threaded rod 44 to rotate synchronously through the bevel gear 41 at the bottom. When the triangular cross frame 410 rises, it drives the extrusion frame 3 to rise synchronously, and the upper wedge block 33 squeezes the lower wedge block 22, so that the sliding frame 21 slides laterally on the outer surface of the connecting plate 11 until the triangular cross frame 410 rises on the outer surface of the vertical threaded rod 49 to separate from the thread, and at the same time, the upper surface of the triangular cross frame 410 squeezes the reset spring 411 to contract, and the extrusion frame 3 will pass through the upper wedge The shape block 33 squeezes the wedge block 22 to the limit position, and at the same time, the dynamic clamping head 25 and the fixed clamping head 14 clamp the POF heat shrink film. When the vertical threaded rod 49 rotates, the double-threaded rod 44 is driven to rotate and control the outer surface connecting plates 11 at both ends to move away from each other. Therefore, the two sets of dynamic clamping heads 25 and fixed clamping heads 14 clamp the POF heat shrink film and move away from each other until the dynamic clamping heads 25 and the fixed clamping heads 14 clamp and break the POF heat shrink film. In the process of stretching, the external detection equipment will obtain the stretching test data, and finally record the data for comparison to determine whether the stretching performance of the POF heat shrink film is qualified.

[0058] After the tensile property detection is completed, the driving motor 48 can be controlled to drive the vertical threaded rod 49 to operate reversely, and at the same time, the reset spring 411 can extrude the triangular crossbeam 410 to make the triangular crossbeam 410 descend and contact the threads on the outer surface of the vertical threaded rod 49, so that when the vertical threaded rod 49 reversely rotates, the triangular crossbeam 410 can be synchronously lowered, and the extrusion frame 3 can descend and reset along with the triangular crossbeam 410, so that the upper wedge-shaped block 33 at the bottom of the extrusion frame 3 can descend and separate from the lower wedge-shaped block 22, and the reverse rotation of the vertical threaded rod 49 can drive the double-threaded rod 44 to synchronously reversely rotate, so that the two groups of connecting plates 11 can reset and slide towards each other, and at the same time, the lower wedge-shaped block 22 is not extruded, the elastic force of the torsional spring 112 can drive the wedge-shaped rotating plate 111 to reset and flip, and the wedge-shaped rotating plate 111 can extrude the movable clamping head 25 to reset and slide on the outer surface of the connecting plate 11, and as the extrusion frame 3 continues to descend, the middle wedge-shaped block 34 at the bottom of the extrusion frame 3 can extrude and slide the top end of the sliding frame 21, so that the sliding frame 21 continues to slide horizontally, and the reset sliding rack 24 can drive the gear 114 to rotate, so that the rotating shaft 18 can drive the wedge-shaped rotating plate 111 to continue to reversely rotate through the chain 110 and the sprocket 19, and during the separation of the movable clamping head 25 and the fixed clamping head 14, the wedge-shaped rotating plate 111 completes a 180-degree reverse deflection, until the POF heat-shrinkable film inside is not restricted and falls under the action of gravity, and the collection box 42 at the bottom can collect the POF heat-shrinkable film that is pulled off, and then the driving motor 48 can be controlled to operate forwardly, to drive the triangular crossbeam 410 to ascend and reset, and at the same time, the wedge-shaped rotating plate 111 can reset and flip under the action of the elastic force of the torsional spring 112, and the sliding frame 21 can reset and slide on the outer surface of the connecting plate 11 under the ascending extrusion of the upper wedge-shaped block 33, wherein when the sliding frame 21 resets and slides, the gear 114 and the ratchet wheel 15 can rotate on the outer surface of the rotating shaft 18, and the ratchet wheel 15 can extrude the pawl 16 to deflect, so that the rotating shaft 18 is controlled in one direction by the gear 114, so that the fixed clamping part 1, the movable clamping part 2, the extrusion frame 3 and the driving part 4 can cooperate to realize automatic tensile detection of the POF heat-shrinkable film, and automatically discharge the POF heat-shrinkable film after detection.

[0059] The above describes one embodiment of the present application in detail, but the content is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A POF heat shrink film performance detection device, comprising a driving component, characterized in that: A fixed clamp is symmetrically and slidably mounted on the outer surface of the middle portion of the driving component, a movable clamp is slidably mounted on the outer surface of one end of the fixed clamp, and an extrusion frame is movably mounted on the outer surface of the upper portion of the driving component and located at the top of the fixed clamp; The fixed clamping member cooperates with the dynamic clamping member to clamp the POF heat shrink film that needs to be tested. At the same time, the fixed clamping member can pre-limit the POF heat shrink film before clamping, and after the test, the fixed clamping member cooperates with the dynamic clamping member to automatically release the POF heat shrink film; The dynamic clamping member is driven by the extrusion frame to approach the fixed clamping member to clamp the POF heat shrink film; The extrusion frame is used to squeeze the dynamic clamping member so that the dynamic clamping member slides close to the fixed clamping member; The driving component is used to provide power for the operation of the fixed clamping member, the movable clamping member and the extrusion frame, and to limit the sliding of the fixed clamping member, the movable clamping member and the extrusion frame; The fixed clamping member includes a connecting plate, the connecting plate is provided with a vertical rod, and one end surface of the connecting plate is provided with a fixed clamping head, a groove is provided at the bottom of the outer surface of the fixed clamping head, a wedge-shaped rotating plate is rotatably installed inside the groove, and the outer surfaces of both ends of the inner side of the wedge-shaped rotating plate are fixedly sleeved with torsion springs, and the inner top end of the fixed clamping head is rotatably clamped with a rotating shaft, and sprockets are fixedly installed on both ends of the rotating shaft and the outer surfaces of both ends of the wedge-shaped rotating plate; Gears are rotatably sleeved on the outer surfaces of both ends of the rotating shaft and located at the edge of the sprocket, a ratchet is welded to the side of the gear, pawls are rotatably clamped on the outer surfaces of both ends of the rotating shaft and engaged with the ratchet, an extrusion spring connected to the rotating shaft is fixedly connected to the upper surface of the pawl, and a chain is meshed and sleeved on the outer surface of the sprocket; The dynamic clamping member includes a sliding frame, a dynamic clamping head is provided at one end of the sliding frame, lower wedge blocks are provided on the outer surfaces of both sides of the other end of the sliding frame, and racks are provided on both sides of the middle part of the sliding frame; An upper wedge block is symmetrically welded to the bottom end of the extrusion frame, and the sliding frame is meshed with the gears through the racks on both sides.

2. The POF heat shrink film performance detection device according to claim 1, characterized in that: A threaded hole is formed on the end of the outer surface of the connecting plate away from the fixed clamping head.

3. The POF heat shrink film performance detection device according to claim 2, characterized in that: A limiting sleeve hole is provided on an end surface of the sliding frame away from the dynamic clamping head.

4. The POF heat shrink film performance detection device according to claim 3, characterized in that: A second sleeve hole is provided on the top outer surface of the extrusion frame, a middle wedge block is provided on the middle outer surface of the extrusion frame, and a first sleeve hole is provided on one end of the top of the middle wedge block.

5. The POF heat shrink film performance detection device according to claim 4, characterized in that: The driving component includes a support base, a column is provided at the center of the rear end top of the support base, a collection box is slidably inserted into the upper surface of the support base, a driving motor is fixedly installed on the upper outer surface of the column, and a vertical threaded rod is fixedly connected to the bottom end of the driving motor; The outer surface of the column is provided with a vertical slide, the outer surface of the vertical threaded rod is threadedly connected to a triangular cross frame that is clamped with the vertical slide, the outer surface of the column is rotatably clamped with a double-threaded rod located below the vertical threaded rod, the bottom end of the vertical threaded rod and the middle outer surface of the double-threaded rod are fixedly installed with helical gears, and the outer surfaces of both sides of the bottom of the column are symmetrically provided with horizontal slide grooves, and the bottom shell of the drive motor is fixedly connected to a return spring sleeved on the outer surface of the vertical threaded rod.

6. The POF heat shrink film performance detection device according to claim 5, characterized in that: One end of the connecting plate is slidably connected to the column through a transverse sliding groove, the sliding frame is slidably sleeved on the outer surface of the connecting plate through a limiting sleeve hole, and the connecting plate is threadedly connected to the double-threaded rod through a threaded hole.

7. The POF heat shrink film performance detection device according to claim 6, characterized in that: The extrusion frame is slidably connected to the outer surface of the triangular cross frame through the second sleeve hole, and the extrusion frame is slidably connected to the outer surface of the vertical rod through the first sleeve hole. The extrusion frame is abutted against the lower wedge block through the upper wedge block at the bottom end, and the vertical threaded rod is rotatably connected to the double-threaded rod through the bevel gear, and the threads on the outer surfaces of both ends of the double-threaded rod are symmetrically arranged.

8. A method for using a POF heat shrink film performance testing device, using the POF heat shrink film performance testing device according to claim 7, characterized in that: include: Step 1: Place both ends of the POF heat shrink film between two sets of fixed clamping heads and a dynamic clamping head, so that the wedge-shaped rotating plate can hold the POF heat shrink film. Step 2: Start the drive motor to rotate and drive the triangular cross frame to rise, and at the same time drive the double-threaded rod to rotate. At the same time, the double-threaded rod will drive the outer surface connecting plates at both ends to move away from each other. The triangular cross frame rises and squeezes the lower wedge block through the squeezing frame, causing the sliding frame to slide horizontally on the outer surface of the connecting plate until the dynamic clamping head and the fixed clamping head clamp the POF heat shrink film; Step 3: The two sets of dynamic clamping heads and fixed clamping heads clamp the POF heat shrink film and move them away from each other until the dynamic clamping heads and the fixed clamping heads clamp and break the POF heat shrink film, and the external detection equipment obtains the detection data; Step 4: Control the drive motor to rotate in the reverse direction, so that the extrusion frame drops and resets. At the same time, the two sets of connecting plates will approach each other, and the sliding rack will drive the chain to rotate in the reverse direction through the gear. During the separation of the dynamic clamping head and the fixed clamping head, the wedge-shaped rotating plate will continue to deflect in the reverse direction until the POF heat shrink film inside falls unrestricted.

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