POF thermal shrinkage film performance detection device and use method thereof

Abstract

The invention relates to the field of POF heat shrink film performance detection, and discloses a POF heat shrink film performance detection device and a use method thereof.The POF heat shrink film performance detection device comprises a driving component, fixed clamping pieces are symmetrically and slidably installed on the outer surface of the middle of the driving component, and movable clamping pieces are slidably installed on the outer surfaces of one ends of the fixed clamping pieces; an extrusion frame is movably mounted at the upper part of the driving part and is positioned on the outer surface of the top of the fixed clamping piece; the fixed clamping piece and the movable clamping piece are matched to be used for clamping the POF heat shrinkage film needing to be detected, meanwhile, the fixed clamping piece can conduct a pre-limiting effect on the POF heat shrinkage film before clamping, through matched operation of the fixed clamping piece, the movable clamping piece, the extrusion frame and the driving component, automatic stretching detection on the POF heat shrinkage film can be achieved, the detection efficiency is improved, and the detection efficiency is improved. And the detected POF thermal shrinkage film is automatically discharged.

Description

Technical Field

[0001] The present invention relates to the field of performance detection of POF heat-shrinkable films, and particularly to a performance detection device for POF heat-shrinkable films and a method for using the same. Background Art

[0002] With the rapid development of the packaging industry, POF heat-shrinkable films are widely used in the packaging of products such as food, medicine, and daily necessities due to their good flexibility, transparency, and environmental protection characteristics. Performance indicators such as shrinkage rate and tensile strength directly affect the packaging effect and the transportation safety of products. Therefore, performance detection has become an indispensable key step in the production process.

[0003] At present, the existing POF heat-shrinkable film tensile strength performance detection devices have significant operational shortcomings. During operation, not only does manual labor need to be used to clamp and fix the POF heat-shrinkable film, but also after the detection, it is necessary to manually clean the detected POF heat-shrinkable film samples one by one. This traditional operation mode makes it impossible for the device to automatically clamp and fasten the POF heat-shrinkable film, and it is even more impossible to automatically discharge and remove the samples after the detection. Therefore, the existing devices have a low degree of automation, which not only limits the improvement of detection efficiency, increases labor costs, but also may affect the accuracy of detection data due to human operation errors, making it difficult to meet the requirements of large-scale and high-precision modern production detection. Summary of the Invention

[0004] The purpose of the present invention is to provide a performance detection device for POF heat-shrinkable films and a method for using the same, and solve the following technical problems: how to achieve automatic tensile detection of POF heat-shrinkable films and automatically discharge the POF heat-shrinkable films after detection.

[0005] The purpose of the present invention can be achieved by the following technical solutions: a performance detection device for POF heat-shrinkable films, including a driving component, symmetrically slidingly installed on the outer surface of the middle part of the driving component are fixed clamping members, and slidably installed on the outer surface of one end of the fixed clamping member is a movable clamping member. An extrusion frame is movably installed on the upper part of the driving component and on the outer surface of the top of the fixed clamping member.

[0006] The fixed clamping member and the movable clamping member cooperate to clamp the POF heat-shrinkable film to be detected. At the same time, the fixed clamping member can perform a pre-limiting function on the POF heat-shrinkable film before clamping, and after detection, the fixed clamping member and the movable clamping member cooperate to automatically release the POF heat-shrinkable film.

[0007] The movable clamping member is driven by the extrusion frame to approach the fixed clamping member to clamp the POF heat-shrinkable film.

[0008] The extrusion frame is used to extrude the movable clamping member, so that the movable clamping member slides close to the fixed clamping member.

[0009] The driving component is used to provide power for the operation of the fixed clamping piece, the movable clamping piece and the extrusion frame, and limit the sliding of the fixed clamping piece, the movable clamping piece and the extrusion frame.

[0010] As a preferred solution of the present invention: the fixed clamping piece includes a connecting plate, a vertical rod is arranged on the connecting plate, a fixed clamping head is arranged on one end surface of the connecting plate, and a threaded hole is opened at the end of the outer surface of the connecting plate far from the fixed clamping head;

[0011] A groove is opened at the bottom of the outer surface of the fixed clamping head, a wedge-shaped rotating plate is rotatably installed inside the groove, torsion springs are fixedly sleeved on the outer surfaces of both ends of the inner side of the wedge-shaped rotating plate, a rotating shaft is rotatably clamped at the top end inside the fixed clamping head, and sprockets are fixedly installed on the outer surfaces of both ends of the rotating shaft and both ends of the wedge-shaped rotating plate;

[0012] Gears are rotatably sleeved on the outer surfaces of both ends of the rotating shaft and located at the edges of the sprockets, ratchets are welded on the sides of the gears, pawls that are meshed and clamped with the ratchets are rotatably clamped on the outer surfaces of both ends of the rotating shaft, 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.

[0013] As a preferred solution of the present invention: the movable clamping piece includes a sliding frame, a movable clamping head is arranged at one end of the sliding frame, lower wedge-shaped blocks are arranged on the outer surfaces of both sides of the other end of the sliding frame, a limiting sleeve hole is opened on the end surface of the sliding frame far from the movable clamping head, and racks are arranged on both sides of the middle of the sliding frame.

[0014] As a preferred solution of the present invention: upper wedge-shaped blocks are symmetrically welded at the bottom end of the extrusion frame, a second socket hole is opened on the outer surface of the top of the extrusion frame, a middle wedge-shaped block is arranged on the outer surface of the middle of the extrusion frame, and a first socket hole is opened at one end of the top of the middle wedge-shaped block.

[0015] As a preferred solution of the present invention: the driving component includes a support base, a column is arranged at the center of the top end of the rear of the support base, a collection box is slidably inserted on the upper surface of the support base, a driving motor is fixedly installed on the outer surface of the upper part of the column, and a vertical threaded rod is fixedly connected to the bottom end of the driving motor;

[0016] A vertical slideway is opened on the outer surface of the column, a triangular cross frame that is threadedly connected to the vertical threaded rod and clamped with the vertical slideway is arranged on the outer surface of the vertical threaded rod, a double threaded rod is rotatably clamped on the outer surface of the column and below the vertical threaded rod, helical gears are fixedly installed on the bottom end of the vertical threaded rod and the middle outer surface of the double threaded rod, transverse chutes are symmetrically opened on the outer surfaces of both sides of the bottom of the column, and a return spring sleeved on the outer surface of the vertical threaded 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 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, the vertical threaded rod is rotatably connected to the double-threaded rod through a 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 detection device and a method for using the same, comprising:

[0020] Step 1: First, 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 receive the POF heat shrink film;

[0021] Step 2: Start the driving motor to rotate and drive the triangular cross frame to rise, and 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. When the triangular cross frame rises, it will squeeze the lower wedge block through the squeezing frame, so that the sliding frame slides 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: Two groups of dynamic clamping heads and fixed clamping heads clamp the POF heat shrink film and move away from each other until the dynamic clamping heads and fixed clamping heads clamp and break the POF heat shrink film, and the external detection device can obtain the detection data;

[0023] Step 4: Control the drive motor to rotate in the reverse direction, so that the extrusion frame descends 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) Through the coordinated operation among the fixed clamping member, the movable clamping member, the extrusion frame and the driving component, during the detection process, the present invention can automatically and firmly clamp the POF heat shrinkable film, thus replacing manual operation, achieving quick fixation, and significantly reducing the labor input and operation time. In addition, after detecting the tensile performance, it can automatically discharge and remove the POF heat shrinkable film, making the processing of POF heat shrinkable film samples more efficient and orderly, reducing the manual cleaning cost and labor intensity, helping the enterprise to achieve cost reduction and efficiency improvement. At the same time, this device can not only significantly improve the detection efficiency, meet the detection requirements of large-scale production, but also conform to the modern production standard through intelligent operation, enhance the technical advantage of the enterprise in the market competition, and promote the POF heat shrinkable film detection technology to move towards a higher level.

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

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

[0028] Figure 1 is a schematic structural diagram of the POF heat shrinkable film performance detection device;

[0029] Figure 2 is a schematic structural diagram of the fixed clamping member;

[0030] Figure 3 is Figure 2 a partial enlarged structural diagram at position A in

[0031] Figure 4 is Figure 2 a partial enlarged structural diagram at position B in

[0032] Figure 5 is a schematic structural diagram of the movable clamping member;

[0033] Figure 6 is a schematic structural diagram of the extrusion frame;

[0034] Figure 7 is a schematic structural diagram of the driving component.

[0035] Description of the Drawings: 1. Fixed clamping member; 2. Movable clamping member; 3. Extrusion frame; 4. Driving component; 11. Connecting plate; 12. Threaded hole; 13. Vertical rod; 14. Fixed clamping head; 15. Ratchet wheel; 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-shaped block; 23. Limiting sleeve hole; 24. Rack; 25. Movable clamping head; 31. First socket hole; 32. Second socket hole; 33. Upper wedge-shaped block; 34. Middle wedge-shaped block; 41. Helical gear; 42. Collection box; 43. Support base; 44. Double threaded rod; 45. Horizontal sliding groove; 46. Column; 47. Vertical sliding track; 48. Driving motor; 49. Vertical threaded rod; 410. Triangular cross frame; 411. Return spring. Detailed implementation

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0037] Please refer to Figures 1-7 As shown in the figure, the present invention is a POF heat shrinkable film performance detection device, including a driving component 4. Symmetrically and slidably installed on the outer surface of the middle part of the driving component 4 is a fixed clamping member 1. Slidably installed on the outer surface of one end of the fixed clamping member 1 is a movable clamping member 2. An extrusion frame 3 is movably installed on the upper part of the driving component 4 and on the outer surface of the top of the fixed clamping member 1;

[0038] The fixed clamping member 1 and the movable clamping member 2 cooperate to clamp the POF heat shrinkable film to be detected. At the same time, the fixed clamping member 1 can pre-limit the POF heat shrinkable film before clamping, and after detection, the fixed clamping member 1 and the movable clamping member 2 cooperate to automatically release the POF heat shrinkable film;

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

[0040] The extrusion frame 3 is used to extrude 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 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 arranged on the connecting plate 11, a fixed clamping head 14 is arranged on one end face of the connecting plate 11, and a threaded hole 12 is opened at the end of the outer surface of the connecting plate 11 away from the fixed clamping head 14;

[0043] A groove 113 is opened at the bottom of the outer surface of the fixed clamping head 14, a wedge-shaped rotating plate 111 is rotatably installed 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 at the top end inside the fixed clamping head 14, and sprockets 19 are fixedly installed on the outer surfaces of both ends of the rotating shaft 18 and 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 at the edges of the sprockets 19, a ratchet wheel 15 is welded to the side surface of the gear 114, pawls 16 that are meshed and clamped with the ratchet wheel 15 are rotatably clamped on the outer surfaces of both ends of the rotating shaft 18, a compression spring 17 connected to the rotating shaft 18 is fixedly connected to the upper surface of the pawl 16, and a chain 110 is meshed and sleeved on the outer surface of the sprocket 19.

[0045] The movable clamping member 2 includes a sliding frame 21, a movable clamping head 25 is arranged at one end of the sliding frame 21, lower wedge-shaped blocks 22 are arranged on the outer surfaces of both sides of the other end of the sliding frame 21, a limiting sleeve hole 23 is opened on the end face of the sliding frame 21 away from the movable clamping head 25, and racks 24 are arranged on both sides of the middle of the sliding frame 21.

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

[0047] The driving component 4 includes a support base 43, a column 46 is arranged at the center of the top end of the rear end of the support base 43, a collection box 42 is slidably inserted on the upper surface of the support base 43, a driving motor 48 is fixedly installed on the outer surface of the upper part 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 sliding groove 47 is opened on the outer surface of the column 46, a triangular cross frame 410 that is threadedly connected to the vertical threaded rod 49 and is clamped with the vertical sliding groove 47 is arranged on the outer surface of the vertical threaded rod 49, a double threaded rod 44 is rotatably clamped on the outer surface of the column 46 and below the vertical threaded rod 49, helical gears 41 are fixedly installed on the bottom end of the vertical threaded rod 49 and the middle outer surface of the double threaded rod 44, transverse sliding grooves 45 are symmetrically opened on the outer surfaces of both sides of the bottom of the column 46, and a return spring 411 sleeved on the outer surface of the vertical threaded rod 49 is fixedly connected to the bottom shell of the driving motor 48.

[0049] One end of the connecting plate 11 is slidably clamped with the vertical column 46 through the transverse chute 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 of the sliding frame 21 on the outer surface of the connecting plate 11. The connecting plate 11 is threadedly connected with 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 and connected 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 socket hole 32, and can drive the lifting of the extrusion frame 3 when the triangular cross frame 410 is lifted and lowered. The extrusion frame 3 is slidably sleeved on the outer surface of the vertical rod 13 through the first socket hole 31, which can ensure the stability of the lifting of the extrusion frame 3. The extrusion frame 3 abuts against the lower wedge block 22 through the upper wedge block 33 at the bottom end, and can extrude the sliding frame 21 to slide on the outer surface of the connecting plate 11. The vertical threaded rod 49 is rotationally connected with 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, and can control the synchronous reverse sliding of the two groups of connecting plates 11 when the double threaded rod 44 rotates.

[0051] A usage method of a POF heat shrinkable film performance detection device includes:

[0052] Step 1: First, place both ends of the POF heat shrinkable film between the two groups of fixed clamping heads 14 and moving clamping heads 25, so that the wedge-shaped rotating plate 111 receives the POF heat shrinkable film;

[0053] Step 2: Start the driving motor 48 to rotate, drive the triangular cross frame 410 to rise, drive the double threaded rod 44 to rotate at the same time, and the double threaded rod 44 will drive the connecting plates 11 on the outer surfaces of both ends to move away from each other. When the triangular cross frame 410 rises, it will squeeze the lower wedge block 22 through the extrusion frame 3, so that the sliding frame 21 slides horizontally on the outer surface of the connecting plate 11 until the moving clamping head 25 and the fixed clamping head 14 clamp the POF heat shrinkable film;

[0054] Step 3: The two groups of moving clamping heads 25 and fixed clamping heads 14 clamp and move away from each other until the moving clamping head 25 and the fixed clamping head 14 clamp and break the POF heat shrinkable film, and the externally connected detection equipment will 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] Working principle of the present invention: 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, and 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, and 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 bear the POF heat shrink film and keep it stable;

[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 is The wedge block 33 squeezes the lower wedge block 22 to reach the limit position, and 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 to control the outer surface connecting plates 11 at both ends to move away from each other. Therefore, the two groups of dynamic clamping heads 25 and the 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 externally connected detection equipment will obtain the stretching detection data, and finally the data is recorded 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 rotate reversely. At the same time, the reset spring 411 will squeeze the triangular cross frame 410, and the triangular cross frame 410 will descend to contact the thread on the outer surface of the vertical threaded rod 49. Therefore, when the vertical threaded rod 49 rotates reversely, it will continue to drive the triangular cross frame 410 to descend synchronously. At the same time, the extrusion frame 3 will follow the triangular cross frame 410 to descend and reset, so that the upper wedge block 33 at the bottom of the extrusion frame 3 descends and separates from the lower wedge block 22. At the same time, reversely rotating the vertical threaded rod 49 will drive the double threaded rod 44 to rotate reversely synchronously, so that the two connecting plates 11 will slide towards each other and reset. And while the lower wedge block 22 is not being extruded, the elastic force of the torsion spring 112 will drive the wedge-shaped rotating plate 111 to reset and flip. At the same time, the wedge-shaped rotating plate 111 will squeeze the moving clamping head 25 to slide and reset on the outer surface of the connecting plate 11. Moreover, as the extrusion frame 3 continues to descend, the bottom surface of the middle wedge block 34 in the middle of the extrusion frame 3 will squeeze one end of the top of the sliding frame 21, so that the sliding frame 21 will continue to slide horizontally. At the same time, the reset sliding rack 24 will drive the gear 114 to rotate, so that the rotating shaft 18 will drive the wedge-shaped rotating plate 111 to continue to rotate reversely through the chain 110 and the sprocket 19. During the separation process of the moving clamping head 25 and the fixed clamping head 14, the wedge-shaped rotating plate 111 completes a 180-degree reverse deflection until the internal POF heat shrinkable film falls under the action of gravity without being restricted. At the same time, the collecting box 42 at the bottom will collect the broken POF heat shrinkable film. Then, control the driving motor 48 to rotate forward, drive the triangular cross frame 410 to rise and reset. At the same time, the wedge-shaped rotating plate 111 is reset and flipped under the action of the elastic force of the torsion spring 112 without being restricted. Moreover, the sliding frame 21 will slide and reset on the outer surface of the connecting plate 11 under the upward extrusion of the upper wedge block 33. Among them, when the sliding frame 21 slides and resets, it will drive the gear 114 and the ratchet 15 to rotate on the outer surface of the rotating shaft 18. At the same time, the ratchet 15 will squeeze the pawl 16 to deflect, so that the rotating shaft 18 is unidirectionally controlled by the gear 114. Therefore, through the coordinated operation of the fixed clamping member 1, the moving clamping member 2, the extrusion frame 3 and the driving component 4, the automatic tensile detection of the POF heat shrinkable film can be realized, and the detected POF heat shrinkable film can be automatically discharged.

[0059] The above has described an embodiment of the present invention in detail, but the content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the patent coverage scope of the present invention.

Claims

1. A performance detection device for a POF heat shrinkable film, comprising a driving component (4), characterized in that, A fixed clamping member (1) is symmetrically and slidably mounted on the outer surface of the middle part of the driving member (4). A movable clamping member (2) is slidably mounted on the outer surface of one end of the fixed clamping member (1). An extrusion frame (3) is movably mounted on the upper part of the driving member (4) and on the outer surface of the top of the fixed clamping member (1). The fixed clamping member (1) and the movable clamping member (2) cooperate to clamp the POF heat shrinkable film to be detected. At the same time, the fixed clamping member (1) can pre-limit the POF heat shrinkable film before clamping, and after detection, the fixed clamping member (1) and the movable clamping member (2) cooperate to automatically release the POF heat shrinkable film. The movable clamping member (2) is driven by the extrusion frame (3) to approach the fixed clamping member (1) for clamping the POF heat shrinkable film. The extrusion frame (3) is used to extrude the movable clamping member (2) so that the movable clamping member (2) slides close to the fixed clamping member (1). The driving member (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 limit the sliding of the fixed clamping member (1), the movable clamping member (2) and the extrusion frame (3).

2. The performance detection device for a POF heat shrinkable film according to claim 1, characterized in that, 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 face of the connecting plate (11). A threaded hole (12) is opened at the end of the outer surface of the connecting plate (11) away from the fixed clamping head (14). A groove (113) is opened 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 at the top end inside the fixed clamping head (14). Sprockets (19) are fixedly mounted on the outer surfaces of both ends of the rotating shaft (18) and both ends of the wedge-shaped rotating plate (111). Gears (114) are rotatably sleeved on the outer surfaces of both ends of the rotating shaft (18) and at the edges of the sprockets (19). A ratchet wheel (15) is welded to the side surface of the gear (114). Pawls (16) that are meshed and clamped with the ratchet wheel (15) are rotatably clamped 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). A chain (110) is meshed and sleeved on the outer surface of the sprocket (19).

3. The performance detection device for a POF heat shrinkable film according to claim 2, characterized in that, The movable clamping member (2) includes a sliding frame (21). A movable clamping head (25) is provided at one end of the sliding frame (21). Lower wedge-shaped 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 opened at the end face of the sliding frame (21) away from the movable clamping head (25). Rack teeth (24) are provided on both sides of the middle part of the sliding frame (21).

4. The performance detection device for a POF heat-shrinkable film according to claim 3, characterized in that, The bottom end of the extrusion frame (3) is symmetrically welded with upper wedge blocks (33). The outer surface of the top of the extrusion frame (3) is provided with a second socket hole (32). The outer surface of the middle part of the extrusion frame (3) is provided with a middle wedge block (34). One end of the top of the middle wedge block (34) is provided with a first socket hole (31).

5. The performance detection device for a POF heat shrinkable film according to claim 4, characterized in that, The driving component (4) includes a support base (43). The center of the top end of the rear of the support base (43) is provided with a column (46). A collection box (42) is slidably inserted into the upper surface of the support base (43). A driving motor (48) is fixedly installed on the outer surface of the upper part of the column (46). The bottom end of the driving motor (48) is fixedly connected with a vertical threaded rod (49). A vertical slideway (47) is provided on the outer surface of the column (46). A triangular cross frame (410) that is threadedly connected to the outer surface of the vertical threaded rod (49) and is clamped with the vertical slideway (47) is provided. A double threaded rod (44) is rotatably clamped on the outer surface of the column (46) and below the vertical threaded rod (49). Helical gears (41) are fixedly installed on the bottom end of the vertical threaded rod (49) and the outer surface of the middle part of the double threaded rod (44). Transverse chutes (45) are symmetrically provided on the outer surfaces of both sides of the bottom of the column (46). A return spring (411) sleeved on the outer surface of the vertical threaded rod (49) is fixedly connected to the bottom shell of the driving motor (48).

6. The performance detection device for a POF heat shrinkable film according to claim 5, wherein One end of the connecting plate (11) is slidably clamped with the column (46) through the transverse chute (45). The sliding frame (21) is slidably sleeved on the outer surface of the connecting plate (11) through the limit socket hole (23). The connecting plate (11) is threadedly connected to the double threaded rod (44) through a threaded hole (12). The sliding frame (21) is meshed and connected to the gear (114) through the racks (24) on both sides.

7. The performance detection device for a POF heat-shrinkable film according to claim 6, characterized in that, The extrusion frame (3) is slidably sleeved on the outer surface of the triangular cross frame (410) through the second socket hole (32). The extrusion frame (3) is slidably sleeved on the outer surface of the vertical rod (13) through the first socket hole (31). The extrusion frame (3) abuts against the lower wedge block (22) through the upper wedge blocks (33) at the bottom end. The vertical threaded rod (49) is rotationally connected to the double threaded rod (44) through the helical gear (41). The threads on the outer surfaces of both ends of the double threaded rod (44) are symmetrically arranged.

8. A performance detection device for a POF heat-shrinkable film and its usage method, adopting a performance detection device for a POF heat-shrinkable film as described in claim 7, characterized in that, Including: Step 1: First, place both ends of the POF heat shrinkable film between two groups of fixed clamping heads (14) and moving clamping heads (25) so that the wedge-shaped rotating plate (111) receives the POF heat shrinkable film. Step 2: Start the driving motor (48) to rotate, drive the triangular cross frame (410) to rise, drive the double threaded rod (44) to rotate at the same time, and the double threaded rod (44) will drive the connecting plates (11) on the outer surfaces of both ends to move away from each other. When the triangular cross frame (410) rises, it will squeeze the lower wedge block (22) through the extrusion frame (3), so that the sliding frame (21) slides horizontally on the outer surface of the connecting plate (11) until the moving clamping head (25) and the fixed clamping head (14) clamp the POF heat shrinkable film. Step 3: The two groups of movable clamping heads (25) and fixed clamping heads (14) clamp the POF heat-shrinkable film and move away from each other until the movable clamping heads (25) and fixed clamping heads (14) clamp and break the POF heat-shrinkable film, and the external detection device is adapted to obtain detection data; Step 4: Control the driving motor (48) to rotate in the reverse direction, so that the extrusion frame (3) descends and resets. At the same time, the two groups of connecting plates (11) will approach each other. At the same time, the sliding rack (24) will drive the chain (110) to rotate in the reverse direction through the gear (114). During the separation of the movable 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 internal POF heat-shrinkable film falls unrestricted.

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