A POF heat shrink film performance testing device

Abstract

The present invention relates to the technical field of POF heat shrink film detection, and discloses a POF heat shrink film performance detection device, including a detection platform, on which are arranged several groups of detection units for tension detection, the detection units including a carrier plate arranged on the upper surface of the detection platform, a first driving motor arranged on the side of the carrier plate, and several moving plates in an equidistant circular array arranged on the upper surface of the carrier plate, the first driving motor can drive several moving plates to move toward or away from each other at the same time, one side of several moving plates is provided with a tensile tester for testing tension, and the upper ends of several moving plates are provided with clamping units on the opposite sides; the clamping unit includes an upper clamping plate arranged on the side of the upper end of the moving plate, and a lower clamping plate rotatably connected to one side of the moving plate is arranged below the upper clamping plate. In the present invention, by arranging moving plates that can move toward or away from each other at the same time, and performing tension detection on the POF heat shrink film in a horizontal direction, the accuracy of the tension test on the POF heat shrink film is improved.

Description

Technical Field

[0001] The invention relates to the technical field of POF heat shrink film detection, in particular to a POF heat shrink film performance detection device. Background Art

[0002] Environmentally friendly POF shrink film is the abbreviation of biaxially oriented polyolefin shrink film. It is a new type of environmentally friendly shrink film that is currently the most widely used and rapidly developing in the world. This product adopts the advanced biaxially oriented three-layer and five-layer melt co-extrusion special process to produce a soft shrink film with high transparency, high shrinkage rate, high toughness, high heat sealing performance, antistatic, excellent cold resistance, safe and reliable. POF shrink film needs to be tested for performance after production to ensure the factory quality of POF shrink film, and then POF shrink film performance testing equipment is needed to perform performance testing on it.

[0003] In order to improve the accuracy of POF shrink film performance detection, the prior art has made many improvements to POF heat shrink film performance detection devices, such as the patent with patent publication number CN218381998U, which discloses a POF heat shrink film tension test device, which belongs to the field of POF cross-linked film testing technology. It includes an operating table, the upper part of the operating table is provided with a fixed component, the fixed component includes an upper bracket and a lower fixed slot block, the upper bracket is an isosceles trapezoidal shell structure, the upper bracket is arranged above the operating table through four symmetrically arranged hydraulic cylinders A, the lower fixed slot block is fixedly arranged at both ends of the operating table, and the upper fixed rollers are rotatably arranged at both ends of the upper bracket, and the upper fixed rollers can be arranged on the upper part of the lower fixed slot block. After adopting the above technical solution, the utility model has the following advantages compared with the prior art: the upper bracket and the lower fixed slot block of the utility model can ensure that the POF heat shrink film remains in a taut state during the detection process, thereby ensuring the accuracy of the tension test.

[0004] The above patent has obvious beneficial effects, but still has the following shortcomings in actual operation:

[0005] In the above-mentioned comparative document, the two ends of the POF heat shrink film are fixed in the lower fixed groove, and the middle position of the POF heat shrink film is squeezed by a hydraulic device to perform tension detection. When the hydraulic device drives the pressing block to move downward to squeeze the POF heat shrink film, the POF heat shrink film is not in a plane. At this time, the POF heat shrink film forms an angle with the position at the lower fixed groove. The angle position is subjected to a tensile force while also being subjected to an upward squeezing force from the edge of the lower fixed groove. Therefore, the POF heat shrink film is easily broken at the edge of the lower fixed groove. The POF heat shrink film is easy to break here, and the fracture at this position cannot represent the tension limit that the POF heat shrink film can withstand. When the pressing block is driven downward by the hydraulic device to squeeze, the force-bearing area is small, and the position squeezed by the pressing block is subjected to a large force and is prone to fracture, thereby reducing the accuracy of the tension detection of the POF heat shrink film. Therefore, there is an urgent need in this field to improve the POF heat shrink film performance detection device to solve the defects of the prior art. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a POF heat shrink film performance detection device to improve the accuracy of the POF heat shrink film tension test.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a POF heat shrink film performance testing device, comprising a testing platform, the testing platform is provided with a plurality of testing units for tension testing, the testing units include a carrier plate arranged on the upper surface of the testing platform, a first driving motor is arranged on the side of the carrier plate, a plurality of movable plates in an equidistant circular array are arranged on the upper surface of the carrier plate, the first driving motor can drive the plurality of movable plates to move toward or away from each other at the same time, a tensile tester for testing tension is arranged on one side of the plurality of movable plates, and clamping units are arranged on the opposite sides of the upper ends of the plurality of movable plates;

[0008] The camming mechanism is a complex two-dimensional structure, and the two cams are connected by a threaded connection to the bottom of the moving plate, and the camming mechanism is a complex two-dimensional structure. The camming mechanism is a complex two-dimensional structure, and the two cams are connected by a threaded connection to the bottom of the moving plate. The camming mechanism is a complex two-dimensional structure, and the two cams are connected by a threaded connection to the bottom of the moving plate.

[0009] Preferably, the extrusion unit includes mounting ears symmetrically fixedly connected to the upper end side of the movable plate and adapted to the lower clamping plate, the two mounting ears are penetrated by a rotating shaft fixedly connected to the lower clamping plate, the two end sides of the rotating shaft are fixedly connected to connecting plates, a connecting rod is fixedly connected between the opposite sides of the two connecting plates away from the rotating shaft, the side of the connecting rod is fixedly connected to a first extrusion block rotatably connected to one end of the arc rod, the upper end side of the movable plate is penetrated by a yield opening adapted to one end of the upper clamping plate, one end of the upper clamping plate is penetrated by the yield opening and one end of the upper clamping plate is slidably connected to a second extrusion block adapted to the first extrusion block, and the upper side of the first extrusion block and the lower side of the second extrusion block are both provided with extrusion slopes.

[0010] Preferably, an annular gear ring with tooth grooves on the side is rotatably connected in the carrier plate, a plurality of first gears meshing with the annular gear ring are rotatably connected in the carrier plate, one end of the first gear protrudes from the side of the annular gear ring, a plurality of movable racks meshing with the first gears are slidably connected in the carrier plate, a second gear meshing with the annular gear ring is fixedly connected at the output end of the first drive motor, and the movable plate is arranged on the upper surface of the movable rack.

[0011] Preferably, a first sliding groove connected to the outside is opened on the upper surface of the movable rack, a first sliding block is slidably connected in the first sliding groove, a mounting plate is fixedly connected to the lower end of the movable plate, the mounting plate is fixedly installed on the upper side of the first sliding block, a first screw rod is rotatably connected between the side walls at both ends of the first sliding groove, the first screw rod passes through the first sliding block and is threadedly connected to the first sliding block, one end of the first screw rod passes through the movable rack and extends to the outside, and the side surface of one end of the first screw rod extending to the outside is threadedly connected to a limiting ring.

[0012] Preferably, a polygonal limit block is fixedly connected to the lower surface of the mounting plate, a limit slot adapted to the limit block is opened on the upper side of the first sliding block, a fastening bolt is passed through the upper surface of the mounting plate, one end of the fastening bolt passes through the mounting plate and the limit block and the end portion thereof is threadedly connected to the bottom of the limit slot.

[0013] Preferably, a second slide groove communicating with the outside is opened on the upper surface of the detection platform, a mounting seat is fixedly connected to the lower surface of the carrying plate, a second slider adapted to the second slide groove is rotatably connected to the lower surface of the mounting seat, a second screw rod with opposite thread teeth is rotatably connected between the side walls at both ends of the second slide groove, the second screw rod passes through the second slider and is threadedly connected to the second slider, and a second drive motor with an output end fixedly connected to one end of the second screw rod is fixedly installed at one end of the detection platform.

[0014] Preferably, a fixed seat is provided on the upper surface of the carrying plate, a support plate is fixedly connected to the side of the lower end of the movable plate, fixed columns are fixedly connected to the fixed seat and the upper surface of the support plate, a fixed rod with one end mounted on the side of a fixed column is provided between the fixed seat and the support plate, and the tensile tester is installed between the fixed rod and the support plate.

[0015] Preferably, a fixed block is fixedly connected to the upper surface of the upper clamping plate, a guide column with one end passing through the fixed block is fixedly connected to the upper side of the movable plate, and a second spring sleeved on the guide column is fixedly connected between the upper side of the movable plate and the side of the fixed block.

[0016] Preferably, a third sliding block is fixedly connected to one end of the second extrusion block close to the upper clamping plate, and a third sliding groove adapted to the third sliding block is formed at one end of the upper clamping plate.

[0017] Preferably, a handle is provided on a side of the second extrusion block away from the movable plate, and a cover plate installed by screws is provided on the upper surface of the carrying plate.

[0018] In view of the shortcomings of the prior art, the present invention provides a POF heat shrink film performance detection device, which overcomes the shortcomings of the prior art. The beneficial effects of the present invention are:

[0019] 1. In the present invention, by setting movable plates that can move toward or away from each other at the same time, when the tension of the POF heat shrink film is tested, the edges of the POF heat shrink film are clamped by the upper clamping plate and the lower clamping plate, and the first driving motor drives several movable plates to move away from each other at the same time. According to the readings on several tensile testers, the average value of the tension test of the POF heat shrink film is taken out, and the tension of the POF heat shrink film is tested in a horizontal direction, thereby improving the accuracy of the tension test of the POF heat shrink film.

[0020] 2. In the present invention, by providing an extrusion unit, etc., the facing sides of the upper clamping plate and the lower clamping plate are wavy, thereby increasing the clamping force on the POF heat shrink film and preventing the POF heat shrink film from slipping. At the same time, when the movable plates move away from each other, the extrusion unit squeezes the arc rod, and the extrusion of the arc rod causes one end of the lower clamping plate to move toward the direction of the upper clamping plate, thereby increasing the clamping force between the upper clamping plate and the lower clamping plate, and improving the stability of the POF heat shrink film edge clamping through a simple structure.

[0021] 3. In the present invention, by setting a first slide groove and a first slider, when detecting a POF heat shrink film of a special shape, one end of the first screw rod is rotated, and when the first screw rod rotates, the first slider is driven to slide in the first slide groove, the position of the movable plate on the movable rack is adjusted, and the position of the first screw rod is fixed by a limit ring, thereby improving the detection range of the overall detection device.

[0022] 4. In the present invention, two groups of detection units are provided to detect the POF heat shrink film at dual stations. When one detection unit is being tested, the POF heat shrink film on the other detection unit can be installed or removed, thereby improving the efficiency of the POF heat shrink film performance detection.

[0023] 5. In the present invention, by setting a second driving motor, when a POF heat shrink film whose length is greater than the diameter of the carrier plate and less than the length of the detection table is subjected to tension detection, the second driving motor drives the second screw rod to rotate. When the second screw rod rotates, it drives the two second sliders to move toward or away from each other in the second slide groove, and the edges of the POF heat shrink film are clamped by the corresponding clamping units on the two carrier plates, thereby improving the detection range of the overall detection device.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the second chute in the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the second slider etc. in the present invention;

[0029] Figure 4 It is a schematic diagram of the structure of the carrier plate in the present invention when viewed from above;

[0030] Figure 5 It is a schematic diagram of the structure inside the carrier plate of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the annular gear ring and the first gear etc. in the present invention;

[0032] Figure 7 It is a structural schematic diagram of the connection of the tensile tester in the present invention;

[0033] Figure 8 It is a schematic diagram of the structure of the movable rack in the present invention;

[0034] Fig. 9It is a schematic structural diagram of a partial cross-section of the first sliding block and the like in the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the upper clamping plate and the lower clamping plate in the present invention;

[0036] Fig.11 It is a schematic diagram of the structure of the arc rod in the present invention;

[0037] Fig.12 It is a schematic diagram of the structure when the lower clamping plate rotates in the present invention;

[0038] Fig.13 for Fig.10 The enlarged structural diagram at A in the middle;

[0039] Fig.14 for Fig.11 Enlarged structural diagram at B in the middle.

[0040] In the figure: 1, test bench; 2, test unit; 3, carrier plate; 4, first drive motor; 5, moving plate; 6, tensile tester; 7, clamping unit; 8, upper clamping plate; 9, lower clamping plate; 10, arc rod; 11, through hole; 12, first spring; 13, mounting ear; 14, rotating shaft; 15, connecting plate; 16, connecting rod; 17, first extrusion block; 18, second extrusion block; 19, extrusion slope; 20, yielding port; 21, annular gear ring; 22, first gear; 23, moving rack; 24, second gear; 25. First slide groove; 26. First slider; 27. Mounting plate; 28. First screw rod; 29. ​​Limiting ring; 30. Limiting plug block; 31. Limiting slot; 32. Fastening bolt; 33. Second slide groove; 34. Second slider; 35. Second screw rod; 36. Second drive motor; 37. Mounting seat; 38. Fixed seat; 39. Support plate; 40. Fixed column; 41. Fixed rod; 42. Fixed block; 43. Guide column; 44. Second spring; 45. Third slide groove; 46. Third slider; 47. Handle; 48. Cover plate. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figure 1-Figure 14A POF heat shrink film performance testing device includes a testing platform 1, on which are disposed a plurality of testing units 2 for tension testing, the testing units 2 comprising a carrying plate 3 disposed on the upper surface of the testing platform 1, a first driving motor 4 disposed on the side of the carrying plate 3, a plurality of moving plates 5 in an equidistant circular array disposed on the upper surface of the carrying plate 3, the first driving motor 4 being able to drive the plurality of moving plates 5 to move toward or away from each other at the same time, a tensile tester 6 for testing tension being disposed on one side of the plurality of moving plates 5, and clamping units 7 being disposed on the facing sides of the upper ends of the plurality of moving plates 5.

[0043] The clamping unit 7 includes an upper clamping plate 8 arranged on the side surface of the upper end of the movable plate 5, and a lower clamping plate 9 rotatably connected to one side of the movable plate 5 is arranged below the upper clamping plate 8. The upper clamping plate 8 and the lower clamping plate 9 are adapted to each other and their facing sides are both wavy. The lower surface of the lower clamping plate 9 is fixedly connected with an arc rod 10 concentric with the rotation position of the lower clamping plate 9 and the movable plate 5. A through hole 11 adapted to the arc rod 10 is opened on the movable plate 5, and one end of the arc rod 10 extends to the side of the movable plate 5 away from the lower clamping plate 9. A first spring 12 sleeved on the side of the arc rod 10 is fixedly connected between the lower surface of the lower clamping plate 9 and one side of the movable plate 5. A squeezing unit is arranged on the side of the movable plate 5. When the movable plate 5 moves away from each other, the squeezing unit squeezes the arc rod 10, and the clamping force between the upper clamping plate 8 and the lower clamping plate 9 is increased.

[0044] When the tension of the POF heat shrink film needs to be tested, the position between the plurality of movable plates 5 is adjusted according to the size of the POF heat shrink film sample, and the first drive motor 4 is started to drive the plurality of movable plates 5 to move toward or away from each other, and the tension tester 6 is checked, and the tension tester 6 is installed on one side of the movable plate 5, and the lower clamping plate 9 is separated from the upper clamping plate 8 by pulling the arc rod 10 obliquely upward away from one end of the lower clamping plate 9, and the first spring 12 is contracted at this time, and one side of the POF heat shrink film is placed between the upper clamping plate 8 and the lower clamping plate 9, and the arc rod 10 is released, and the tension of the first spring 12 drives the lower clamping plate 9 to rotate, and the edge of the POF heat shrink film is clamped by the upper clamping plate 8 and the lower clamping plate 9, and the first drive is started. The motor 4, the first driving motor 4 drives several moving plates 5 to move in opposite directions at the same time. Since the facing sides of the upper clamping plate 8 and the lower clamping plate 9 are wavy, the clamping force on the POF heat shrink film is increased to prevent the POF heat shrink film from slipping. At the same time, since the moving plates 5 move in opposite directions, the squeezing unit squeezes the arc rod 10, and the squeezing arc rod 10 makes one end of the lower clamping plate 9 move in the direction of the upper clamping plate 8, thereby increasing the clamping force between the upper clamping plate 8 and the lower clamping plate 9. The clamping stability of the POF heat shrink film can be improved without the need to install additional electrical products, and the average value of the tension test of the POF heat shrink film is taken out according to the readings on the several tensile testers 6, and the tension of the POF heat shrink film is tested in the horizontal direction to improve the accuracy of the tension test of the POF heat shrink film.

[0045] It is worth noting that the above two groups of detection units 2 are used to realize double-station detection of POF heat shrink film. When one detection unit 2 is being tested, the POF heat shrink film on the other detection unit 2 can be installed or removed, thereby improving the efficiency of POF heat shrink film performance detection.

[0046] It should be noted that the number of the above-mentioned movable plates 5 can be determined according to actual conditions. The present invention takes four movable plates 5 as an example. When a POF heat shrink film in the shape of a long strip (whose length is not greater than the spacing between two symmetrical movable plates 5 facing each other) needs to be tested for tension, the two ends of the POF heat shrink film can be clamped on the upper clamping plate 8 and the lower clamping plate 9 facing and symmetrically. When a circular, polygonal or square POF heat shrink film needs to be tested, the four sides of the POF heat shrink film can be clamped by four clamping units 7. When a triangular POF heat shrink film needs to be tested, the sides of the POF heat shrink film can be clamped on three adjacent clamping units 7 for testing. When a POF heat shrink film in the shape of a long strip (whose length is greater than the diameter of the carrier plate 3 and less than the maximum spacing between the two carrier plates 3) needs to be tested, the two ends of the POF heat shrink film can be clamped by the clamping units 7 on the two carrier plates 3 by rotating the carrier plate 3 or the movable plate 5, thereby improving the scope of application of the tension test of the POF heat shrink film.

[0047] As a technical optimization scheme of the present invention, the extrusion unit includes mounting ears 13 which are symmetrically fixedly connected to the upper end side of the movable plate 5 and adapted to the lower clamping plate 9. The two mounting ears 13 are penetrated by a rotating shaft 14 fixedly connected to the lower clamping plate 9. Both end sides of the rotating shaft 14 are fixedly connected to connecting plates 15. A connecting rod 16 is fixedly connected between the opposite sides of the ends of the two connecting plates 15 away from the rotating shaft 14. A first extrusion block 17 rotatably connected to one end of the arc rod 10 is fixedly connected to the side of the connecting rod 16. A clearance opening 20 adapted to one end of the upper clamping plate 8 is penetrated by the upper end side of the movable plate 5. The clearance opening 20 is penetrated at one end of the upper clamping plate 8 and a second extrusion block 18 adapted to the first extrusion block 17 is slidably connected to one end of the upper clamping plate 8. The upper side of the first extrusion block 17 and the lower side of the second extrusion block 18 are both provided with an extrusion slope 19.

[0048] When it is necessary to clamp the edge of the POF heat shrink film, start the first drive motor 4, and the first drive motor 4 drives the movable plate 5 to move in opposite directions. Since the facing surfaces of the upper clamping plate 8 and the lower clamping plate 9 are wavy, the friction between the POF heat shrink film and the upper clamping plate 8 is relatively large. When the POF heat shrink film is subjected to a certain tension, the upper clamping plate 8 will move slightly toward the center point of the carrier plate 3. At this time, one end of the upper clamping plate 8 moves slightly in the yielding opening 20 and drives the second extrusion block 18 to move. The second extrusion block 18 and the first The first extrusion block 17 is subjected to a downward force by cooperating with the extrusion slope 19 adapted on the extrusion block 17. The first extrusion block 17 extrudes the arc rod 10 to move in the direction of the lower clamping plate 9, and one end of the lower clamping plate 9 moves in the direction of the upper clamping plate 8, thereby increasing the clamping force between the upper clamping plate 8 and the lower clamping plate 9. As the pulling force increases, the clamping force between the upper clamping plate 8 and the lower clamping plate 9 increases accordingly, thereby improving the stability of clamping the edge of the POF heat shrinkable film. The overall structure is simple, the cost is low and the operation is convenient.

[0049] As a technical optimization scheme of the present invention, an annular gear ring 21 with a tooth groove on the side is rotatably connected inside the carrier plate 3, a plurality of first gears 22 meshing with the annular gear ring 21 are rotatably connected inside the carrier plate 3, one end of the first gear 22 protrudes from the side of the annular gear ring 21, a plurality of movable racks 23 meshing with the first gears 22 are slidably connected inside the carrier plate 3, a second gear 24 meshing with the annular gear ring 21 is fixedly connected at the output end of the first drive motor 4, and the movable plate 5 is arranged on the upper surface of the movable rack 23.

[0050] When the first drive motor 4 is started, the output end of the first drive motor 4 drives the second gear 24 to rotate, and the second gear 24 drives the annular gear ring 21 to rotate when rotating, and the annular gear ring 21 drives several first gears 22 to rotate simultaneously when rotating, and the first gear 22 drives the corresponding moving rack 23 to move toward or away from each other on the carrier plate 3. One first drive motor 4 drives multiple moving plates 5 to move toward each other simultaneously, which has a simple structure and reduces the detection cost.

[0051] As a technical optimization scheme of the present invention, a first sliding groove 25 connected to the outside is opened on the upper surface of the movable rack 23, and a first slider 26 is slidably connected in the first sliding groove 25. A mounting plate 27 is fixedly connected to the lower end of the movable plate 5, and the mounting plate 27 is fixedly installed on the upper side of the first slider 26. A first screw rod 28 is rotatably connected between the side walls at both ends of the first sliding groove 25. The first screw rod 28 passes through the first slider 26 and is threadedly connected to the first slider 26. One end of the first screw rod 28 passes through the movable rack 23 and extends to the outside. The side surface of one end of the first screw rod 28 extending to the outside is threadedly connected to a limiting ring 29.

[0052] When it is necessary to detect a POF heat shrink film of an irregular shape (such as a triangle or a trapezoid, etc.), the position of one or more movable plates 5 on the movable rack 23 can be adjusted, and several movable plates 5 can be adjusted to a shape similar to the POF heat shrink film to be detected, and the edge of the POF heat shrink film can be clamped by the clamping unit 7. When the position of the movable plate 5 on the movable rack 23 is adjusted, the end of the first screw rod 28 located on the outside is rotated. When the first screw rod 28 rotates, it drives the first slider 26 to slide in the first slide groove 25, so that the position of the movable plate 5 on the movable rack 23 can be adjusted. After the position of the movable plate 5 on the movable rack 23 is adjusted, the limit ring 29 is tightened to fix the position of the first screw rod 28.

[0053] As a technical optimization solution of the present invention, a polygonal limit block 30 is fixedly connected to the lower surface of the mounting plate 27, a limit slot 31 adapted to the limit block 30 is opened on the upper side of the first slider 26, and a fastening bolt 32 is passed through the upper surface of the mounting plate 27. One end of the fastening bolt 32 passes through the mounting plate 27 and the limit block 30, and the end thereof is threadedly connected to the bottom of the limit slot 31.

[0054] When installing the movable plate 5, the polygonal limiting plug 30 on the lower surface of the mounting plate 27 is inserted into the limiting slot 31 on the first slider 26, and one end of the fastening bolt 32 passes through the mounting plate 27 and the limiting plug 30 and is threadedly connected to the threaded hole at the bottom of the limiting slot 31, and the fastening bolt 32 is tightened. Through the cooperation of the fastening bolt 32 and the polygonal limiting plug 30, the stability of the movable plate 5 after installation is improved.

[0055] As a technical optimization scheme of the present invention, a second slide groove 33 connected to the outside is opened on the upper surface of the detection platform 1, a mounting seat 37 is fixedly connected to the lower surface of the carrying plate 3, and a second slider 34 adapted to the second slide groove 33 is rotatably connected to the lower surface of the mounting seat 37. A second screw rod 35 with reverse thread teeth is rotatably connected between the side walls at both ends of the second slide groove 33. The second screw rod 35 passes through the second slider 34 and is threadedly connected to the second slider 34. A second drive motor 36 with an output end fixedly connected to one end of the second screw rod 35 is fixedly installed at one end of the detection platform 1.

[0056] When it is necessary to perform a tensile test on a POF heat shrink film whose length is greater than the diameter of the carrier plate 3 and less than the length of the detection platform 1, the spacing between the two carrier plates 3 is adjusted according to the length of the POF heat shrink film to be detected, and the second drive motor 36 is started. The output end of the second drive motor 36 drives the second screw rod 35 to rotate. The threads on the second screw rod 35 are in opposite directions with the length center line of the detection platform 1 as the dividing line. When the second screw rod 35 rotates, it drives the two second sliders 34 to move toward or away from each other in the second slide groove 33, and clamps the edge of the POF heat shrink film through the corresponding clamping units 7 on the two carrier plates 3, and performs a tensile test on the POF heat shrink film with a longer length by starting the first drive motor 4 or the second drive motor 36, thereby improving the detection range of the overall detection device.

[0057] As a technical optimization solution of the present invention, a fixed seat 38 is provided on the upper surface of the carrying plate 3, a support plate 39 is fixedly connected to the lower end side of the movable plate 5, a fixed column 40 is fixedly connected to the upper surfaces of the fixed seat 38 and the support plate 39, a fixed rod 41 with one end mounted on the side of a fixed column 40 is provided between the fixed seat 38 and the support plate 39, and the tensile tester 6 is installed between the fixed rod 41 and the support plate 39.

[0058] The above-mentioned fixing rod 41 can be replaced according to actual conditions. One end of the fixing rod 41 is sleeved on the fixing column 40, and the two ends of the tension tester 6 are respectively sleeved on the fixing rod 41 and the fixing column 40 on the support plate 39, which is convenient for the installation of the tension tester 6.

[0059] As a technical optimization solution of the present invention, a fixed block 42 is fixedly connected to the upper surface of the upper clamping plate 8, a guide column 43 with one end passing through the fixed block 42 is fixedly connected to the upper side surface of the movable plate 5, and a second spring 44 mounted on the guide column 43 is fixedly connected between the upper side surface of the movable plate 5 and the side surface of the fixed block 42.

[0060] After the tension test of the POF heat shrink film is completed, the first drive motor 4 is started in reverse, and the plurality of movable plates 5 are moved closer to each other. The tension of the second spring 44 pulls the upper clamping plate 8 back to the starting position, making it easier for the inspector to remove the POF heat shrink film. The guide column 43 prevents the second spring 44 from deforming.

[0061] As a technical optimization solution of the present invention, the second extrusion block 18 is fixedly connected to one end of the upper clamping plate 8 with a third slider 46, and one end of the upper clamping plate 8 is provided with a third slide groove 45 adapted to the third slider 46. When the lower clamping plate 9 needs to be rotated, the second extrusion block 18 is moved, and the second extrusion block 18 slides in the third slide groove 45 through the third slider 46, giving way to the first extrusion block 17, so that the inspection personnel can rotate the lower clamping plate 9.

[0062] As a technical optimization solution of the present invention, a handle 47 is provided on the side of the second extrusion block 18 away from the movable plate 5, and a cover plate 48 installed by screws is provided on the upper surface of the carrying plate 3. The cover plate 48 is used to seal the inside of the carrying plate 3 and is installed by screws to facilitate maintenance of the internal parts of the carrying plate 3. The handle 47 facilitates the inspection personnel to rotate the lower clamping plate 9.

[0063] Among them, the first drive motor 4, the tension tester 6 and the second drive motor 36 mentioned above can be purchased on the market. They are mature technologies and have been fully disclosed, so they are not repeated in the specification. The first drive motor 4 and the second drive motor 36 are both equipped with power connection lines, and they are electrically connected to the external main controller and 220V phase voltage (or 380V line voltage) through the power lines, and the main controller can be a conventional known device such as a computer that plays a control role.

[0064] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0065] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A POF heat shrink film performance testing device, comprising a testing platform (1), characterized in that: The detection platform (1) is provided with a plurality of detection units (2) for tension detection, the detection units (2) comprising a carrier plate (3) arranged on the upper surface of the detection platform (1), a first driving motor (4) being arranged on the side of the carrier plate (3), a plurality of movable plates (5) being arranged in an equidistant circular array on the upper surface of the carrier plate (3), the first driving motor (4) being able to drive the plurality of movable plates (5) to move towards each other or away from each other at the same time, a tensile tester (6) for testing tension being arranged on one side of the plurality of movable plates (5), and a clamping unit (7) being arranged on the opposite sides of the upper ends of the plurality of movable plates (5); The clamping unit (7) comprises an upper clamping plate (8) arranged on the upper end side of the movable plate (5); a lower clamping plate (9) is provided below the upper clamping plate (8) and is rotatably connected to one side of the movable plate (5); the upper clamping plate (8) and the lower clamping plate (9) are adapted to each other and their opposite sides are both wavy; an arc-shaped rod (10) which is concentric with the rotational position of the lower clamping plate (9) and the movable plate (5) is fixedly connected to the lower surface of the lower clamping plate (9); a curved rod (10) which is concentric with the rotational position of the lower clamping plate (9) and the movable plate (5) is provided through the movable plate (5); ) is provided with a through hole (11) adapted therefor, and one end of the arc-shaped rod (10) extends to a side of the movable plate (5) away from the lower clamping plate (9), a first spring (12) sleeved on the side of the arc-shaped rod (10) is fixedly connected between the lower surface of the lower clamping plate (9) and one side of the movable plate (5), and a squeezing unit is provided on the side of the movable plate (5), and when the movable plates (5) move away from each other, the squeezing unit squeezes the arc-shaped rod (10), thereby increasing the clamping force between the upper clamping plate (8) and the lower clamping plate (9); The extrusion unit comprises mounting ears (13) which are symmetrically fixedly connected to the upper side of the movable plate (5) and adapted to the lower clamping plate (9); a rotating shaft (14) which is fixedly connected to the lower clamping plate (9) passes through the two mounting ears (13); connecting plates (15) are fixedly connected to the side surfaces of both ends of the rotating shaft (14); a connecting rod (16) is fixedly connected between the side surfaces of the two connecting plates (15) which are away from the rotating shaft (14); and the side surfaces of the connecting rod (16) are fixedly connected to the rotating shaft (14). A first extrusion block (17) is fixedly connected to the surface and is rotatably connected to one end of the arc rod (10); a clearance opening (20) adapted to one end of the upper clamping plate (8) is penetrated through the side surface of the upper end of the movable plate (5); one end of the upper clamping plate (8) penetrates the clearance opening (20) and one end of the upper clamping plate (8) is slidably connected to a second extrusion block (18) adapted to the first extrusion block (17); the upper side surface of the first extrusion block (17) and the lower side surface of the second extrusion block (18) are both provided with an extrusion slope (19).

2. A POF heat shrink film performance detection device according to claim 1, characterized in that: An annular gear ring (21) with a tooth groove on the side is rotatably connected inside the carrier plate (3), and a plurality of first gears (22) meshing with the annular gear ring (21) are rotatably connected inside the carrier plate (3), one end of the first gear (22) protrudes from the side of the annular gear ring (21), and a plurality of movable racks (23) meshing with the first gears (22) are slidably connected inside the carrier plate (3), and a second gear (24) meshing with the annular gear ring (21) is fixedly connected to the output end of the first drive motor (4), and the movable plate (5) is arranged on the upper surface of the movable rack (23).

3. A POF heat shrink film performance detection device according to claim 2, characterized in that: The upper surface of the movable rack (23) is provided with a first sliding groove (25) connected to the outside, and a first slider (26) is slidably connected in the first sliding groove (25). The lower end of the movable plate (5) is fixedly connected with a mounting plate (27), and the mounting plate (27) is fixedly installed on the upper side of the first slider (26). A first screw rod (28) is rotatably connected between the side walls at both ends of the first sliding groove (25), and the first screw rod (28) passes through the first slider (26) and is threadedly connected to the first slider (26). One end of the first screw rod (28) passes through the movable rack (23) and extends to the outside. The side surface of one end of the first screw rod (28) extending to the outside is threadedly connected to a limiting ring (29).

4. A POF heat shrink film performance detection device according to claim 3, characterized in that: A polygonal limiting plug (30) is fixedly connected to the lower surface of the mounting plate (27); a limiting slot (31) adapted to the limiting plug (30) is provided on the upper side of the first sliding block (26); a fastening bolt (32) is passed through the upper surface of the mounting plate (27); one end of the fastening bolt (32) passes through the mounting plate (27) and the limiting plug (30) and the end thereof is threadedly connected to the bottom of the limiting slot (31).

5. A POF heat shrink film performance detection device according to claim 1, characterized in that: The upper surface of the detection platform (1) is provided with a second slide groove (33) communicating with the outside, the lower surface of the carrying plate (3) is fixedly connected with a mounting seat (37), the lower surface of the mounting seat (37) is rotatably connected with a second slider (34) adapted to the second slide groove (33), a second screw rod (35) with screw teeth in opposite directions is rotatably connected between the side walls at both ends of the second slide groove (33), the second screw rod (35) passes through the second slider (34) and is threadedly connected to the second slider (34), and a second drive motor (36) whose output end is fixedly connected to one end of the second screw rod (35) is fixedly installed at one end of the detection platform (1).

6. A POF heat shrink film performance detection device according to claim 1, characterized in that: A fixing seat (38) is provided on the upper surface of the carrier plate (3); a support plate (39) is fixedly connected to the side surface of the lower end of the movable plate (5); fixing columns (40) are fixedly connected to the upper surfaces of the fixing seat (38) and the support plate (39); a fixing rod (41) with one end sleeved on the side surface of a fixing column (40) is provided between the fixing seat (38) and the support plate (39); and the tensile tester (6) is installed between the fixing rod (41) and the support plate (39).

7. A POF heat shrink film performance detection device according to claim 1, characterized in that: The upper surface of the upper clamping plate (8) is fixedly connected to a fixed block (42); the upper side surface of the movable plate (5) is fixedly connected to a guide column (43) having one end passing through the fixed block (42); and a second spring (44) sleeved on the guide column (43) is fixedly connected between the upper side surface of the movable plate (5) and the side surface of the fixed block (42).

8. A POF heat shrink film performance detection device according to claim 1, characterized in that: One end of the second extrusion block (18) close to the upper clamping plate (8) is fixedly connected to a third sliding block (46), and one end of the upper clamping plate (8) is provided with a third sliding groove (45) adapted to the third sliding block (46).

9. A POF heat shrink film performance detection device according to claim 1, characterized in that: A handle (47) is provided on the side of the second extrusion block (18) away from the movable plate (5), and a cover plate (48) mounted by screws is provided on the upper surface of the carrying plate (3).

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