A device for detecting the tenacity of a plastic packaging bag

Abstract

The present application relates to the technical field of plastic packaging bag production, and particularly relates to a plastic packaging bag tenacity detection device. The device comprises a fixing unit, which is provided with a multidirectional detection unit at the bottom; the multidirectional detection unit comprises a lower installation cylinder, which is communicated with an operation cylinder at the bottom; the diameter of the operation cylinder is larger than that of the lower installation cylinder, and the ports at the upper and lower ends of the operation cylinder are both provided with arc surfaces; a plurality of groups of plate feeding mechanisms are arranged in annular array on the arc surfaces. The present application allows each group of radiation pressing plates to spread radially to each direction and support the plastic packaging bag from the inside. When the fourth slide group at the bottom is lowered, the lower pressing strip is pushed down, and the plastic packaging bag is given a pushing force from the bottom, and the radially spread plastic packaging bags are combined to realize omnidirectional pressing of the plastic packaging bag. The detection busy point is avoided, and the detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plastic packaging bag production, and particularly relates to a plastic packaging bag tenacity strength detection device. BACKGROUND

[0002] After the production of the plastic packaging bag is completed, the tenacity strength of the plastic packaging bag needs to be detected to test the load limit of the plastic packaging bag.

[0003] After searching, the present citation with the publication number CN118583627A and the publication date of September 3, 2024 is found, which is named a plastic packaging bag tensile detection device. The device comprises a workbench, a double-direction ball screw is arranged above the workbench along the transverse direction, first rotary bearing seats are arranged at both ends of the double-direction ball screw, a second rotary bearing seat is arranged in the middle of the double-direction ball screw, the first rotary bearing seats and the second rotary bearing seat are fixedly connected with the top of the workbench, a rotary motor is arranged outside the first rotary bearing seat at one end of the double-direction ball screw, the output end of the rotary motor is connected with one end of the double-direction ball screw, tensile assemblies are symmetrically arranged on the double-direction ball screws at both sides of the second rotary bearing seat to enable the tensile assemblies at both sides of the second rotary bearing seat to oppositely move when the double-direction ball screw rotates, a fixed limiting assembly is arranged on the workbench top corresponding to the position of the first rotary bearing seat, and a control device is arranged on the outer surface of the workbench at the longitudinal side. The above-mentioned embodiment has stable and firm overall structure and high practicability, can simultaneously perform synchronous tensile detection on two plastic packaging bags, and improves the detection efficiency.

[0004] However, the above-mentioned embodiment still has the following defects:

[0005] The above-mentioned embodiment can only pull the plastic packaging bag in a single direction from the outside, so that the stress point of the plastic packaging bag is single, and the strength limit of the plastic packaging bag under multi-directional stress cannot be tested, thereby causing the detection precision to decrease. SUMMARY

[0006] In view of the above problems, the present application provides a plastic packaging bag tenacity strength detection device, which comprises a fixing unit, and a multi-directional detection unit is arranged at the bottom of the fixing unit.

[0007] Several sets of plate feeding mechanisms are distributed in a circular array on both sets of the arc surfaces, and the plate feeding mechanisms are arranged at an angle; a multi-directional pushing component is provided in the operating cylinder, and several sets of plate feeding mechanisms are distributed in a circular array on both sets of the arc surfaces, and the plate feeding mechanisms are arranged at an angle, and one end of the plate feeding mechanism is connected to the multi-directional pushing component in a transmission manner, and the top of the plate feeding mechanism extends to the outside of the operating cylinder and is installed with a radiation pressure plate; several sets of the radiation pressure plates are combined to form a spherical structure; the bottom of the multi-directional pushing component is connected to a lower pressure bar in a transmission manner;

[0008] The multi-directional pushing components drive each group of radial pressure plates and lower pressure strips to move radially in all directions, so as to conduct all-round toughness testing on plastic packaging bags.

[0009] Furthermore, the detection device also includes a detection platform, an external detection unit is provided directly above the detection platform, and the external detection unit is located directly below the multi-directional detection unit.

[0010] Furthermore, the external detection unit includes a detection ring, which is an elliptical ring structure. A first electric slide is arranged on one side of the detection ring in a vertical direction, and the output end of the first electric slide is transmission-connected to the detection ring; several groups of torsion detection mechanisms are arranged at equal intervals at the edge of the top outer wall of the detection ring.

[0011] Furthermore, the torsion detection mechanism includes a mounting frame, which is installed at the edge of the top outer wall of the detection ring, and a second electric slide is installed horizontally on the top of the mounting frame, and the second electric slide extends horizontally from one end close to the detection ring to one end away from the detection ring.

[0012] Furthermore, the output end of the second electric slide is connected to a first servo motor, and the top of the first servo motor is connected to a rocking arm in a vertical direction. One end of several groups of extension rods are distributed in a circular array on the side walls around the rocking arm, and the other end of the extension rod extends horizontally away from the rocking arm, and a torsion hammer is installed at the port.

[0013] Furthermore, the fixing unit includes an upper mounting cylinder, and several groups of first slide grooves are distributed in a circular array on the side walls around the upper mounting cylinder, and two groups of second slide grooves are symmetrically provided on both sides of the first slide groove; a first electric push rod is installed at the center of the top inner wall of the upper mounting cylinder, and the bottom of the first electric push rod is transmission-connected to a lifting column, and several groups of fixing plates with the same number as the first slide grooves are distributed in a circular array on the side walls around the lifting column.

[0014] Further, the first sliding groove is slidably connected with a first horizontal rod, one end of the first horizontal rod is installed on the corresponding set of fixed plates, the other end of the first horizontal rod extends to the outside of the upper mounting cylinder, and a second horizontal rod is movably installed; a set of fixed bolts are movably installed at the both side edges of each set of fixed plates, and the other end of the fixed bolt extends to the outside of the upper mounting cylinder through the corresponding set of second sliding grooves.

[0015] Further, the second horizontal rod is installed with a crescent plate at the end port away from the first horizontal rod, a plurality of sets of fixed teeth are arranged at the bottom of the crescent plate at equal intervals, a fixed ring is arranged below the upper mounting cylinder, the central axis of the fixed ring coincides with the central axis of the upper mounting cylinder, and a plurality of sets of fixed grooves are annularly arranged at the top of the fixed ring, and each set of fixed teeth is movably clamped in the corresponding set of fixed grooves.

[0016] Further, the multi-directional pushing component comprises a first lead screw, a second servo motor is drivingly connected to the top of the first lead screw, the first lead screw extends to the inside of the operation cylinder at the bottom, and a separation block is installed; a second lead screw is installed at the bottom of the separation block in the vertical direction, and the screw thread directions of the second lead screw and the first lead screw are opposite.

[0017] Further, a set of fourth sliding blocks are threadedly connected to the second lead screw and the first lead screw, a set of pushing blocks are sleeved on the two sets of fourth sliding blocks, and the opposite two side walls of the two sets of pushing blocks are inclined surfaces; one end of each set of plate conveying mechanisms located in the operation cylinder is slidably attached to the corresponding set of inclined surfaces; a set of third sliding grooves are arranged on one side of the second lead screw and the first lead screw, third sliding blocks are slidably connected in the third sliding grooves, and the two sets of pushing blocks are connected with the two sets of third sliding blocks respectively.

[0018] The beneficial effects of the present application are:

[0019] 1. By rotating the first lead screw and the second lead screw with opposite screw thread directions at the same time, the two sets of pushing blocks move vertically in opposite directions, and the sliding attachment relationship between the two sets of inclined surfaces and the respective corresponding sets of pestles makes the pestles move outward along the inclined path of the outer cylinder. Thus, each set of radial pressing plates spreads radially to each direction, and the plastic packaging bag is lifted from the inside. While the lower set of fourth sliding blocks descends, it pushes the lower pressing strip down, and gives the plastic packaging bag a pushing force from the bottom, and in cooperation with the radially spread plastic packaging bags, the plastic packaging bag is subjected to omnidirectional pressing. Avoiding the detection busy point, thereby improving the detection accuracy.

[0020] 2. Then, reversely sleeve the opening of the plastic packaging bag onto the top of the fixing ring, and then start the first electric push rod, which drives the lifting column to descend, thereby lowering each group of crescent plates until each group of fixing teeth is respectively engaged in their corresponding set of fixing grooves, thereby improving the stability of the plastic packaging bag during inspection and preventing it from falling off due to tension.

[0021] 3. Each set of crescent plates can be disassembled by simply removing the second crossbar from the first crossbar, then removing the fixing bolts and taking out the fixing plate. This allows plastic packaging bags to be inspected even when the top is subjected to uneven force, enriching the functionality of the device and improving the convenience of subsequent maintenance.

[0022] 4. Activate each set of second electric slides, which drive each set of torsion hammers to move horizontally toward the side of the plastic bag. Then activate the first servo motor, which drives each set of torsion hammers in a circular motion. These hammers alternately slide and adhere to the outer wall of the plastic bag, increasing the horizontal pulling force on the plastic bag, thereby enriching the detection items and improving the detection effect of the device.

[0023] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be 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

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic structural diagram of a detection device according to an embodiment of the present invention is shown.

[0026] Figure 2 FIG. 4 shows a schematic structural diagram of an external detection unit according to an embodiment of the present invention.

[0027] Figure 3 A structural schematic diagram of a torsion detection mechanism according to an embodiment of the present invention is shown.

[0028] Figure 4 A structural schematic diagram of a fixing unit according to an embodiment of the present invention is shown.

[0029] Figure 5A cross-sectional schematic diagram of a fixing unit according to an embodiment of the present invention is shown.

[0030] Figure 6 A schematic diagram of the connection between the first cross bar, the second cross bar and the crescent plate according to an embodiment of the present invention is shown.

[0031] Figure 7 FIG. 4 shows a schematic structural diagram of a multi-directional detection unit according to an embodiment of the present invention.

[0032] Figure 8 A schematic diagram of the connection between the lower mounting cylinder, the operating cylinder and the outlet pipe according to an embodiment of the present invention is shown.

[0033] Figure 9 FIG. 4 is a cross-sectional schematic diagram of a multi-directional detection unit according to an embodiment of the present invention.

[0034] Figure 10 A cross-sectional schematic diagram of a plate feeding mechanism according to an embodiment of the present invention is shown.

[0035] Figure 11 A schematic diagram of the connection between the plate feeding mechanism and the radiation pressure plate according to an embodiment of the present invention is shown.

[0036] In the figure: 100, detection platform; 110, top plate; 200, external detection unit; 210, first electric slide; 220, detection ring; 230, torsion detection mechanism; 231, mounting frame; 232, second electric slide; 233, first servo motor; 234, rocking arm; 235, extension rod; 236, torsion hammer; 300, fixing unit; 310, upper mounting cylinder; 311, first slide; 312, second slide; 320, first electric push rod; 330, lifting column; 331, fixing plate; 340, first crossbar; 341, fixing bolt; 350, second crossbar; 360, crescent plate; 361. Fixed tooth; 370. Fixed ring; 371. Fixed groove; 400. Multi-directional detection unit; 410. Lower mounting cylinder; 420. Operating cylinder; 421. Arc surface; 422. Third slide groove; 423. Third slider; 430. Outlet pipe; 440. Second servo motor; 441. First screw rod; 442. Isolation block; 443. Second screw rod; 444. Fourth slider; 445. Push block; 450. Plate feeding mechanism; 451. Outer cylinder; 452. Pestle rod; 453. Return spring; 454. Spring push block; 460. Docking rod; 470. Lower rod; 480. Lower pressure strip; 490. Radiation pressure plate. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 making creative efforts shall fall within the scope of protection of the present invention.

[0038] The embodiment of the present invention provides a device for testing the toughness strength of plastic packaging bags. Figure 1 As shown, it includes a detection platform 100, and an external detection unit 200 is provided directly above the detection platform 100.

[0039] The top plate 110 is located directly above the external detection unit 200. A fixing unit 300 is mounted at the bottom of the top plate 110, and a multi-directional detection unit 400 is mounted at the bottom of the fixing unit 300. The fixing unit 300 is used to secure the plastic packaging bag, while the multi-directional detection unit 400 is used to support the plastic packaging bag from the inside to measure its toughness strength. The external detection unit 200 is used to twist the plastic packaging bag from the outside to determine its toughness when subjected to forces from different directions and methods.

[0040] The external detection unit 200 is located directly below the multi-directional detection unit 400 .

[0041] For example, Figure 2 As shown, the external detection unit 200 includes a detection ring 220 with an elliptical ring structure and is located directly below the multi-directional detection unit 400. A first electric slide 210 is vertically mounted on one side of the detection ring 220, with the output end of the first electric slide 210 in transmission connection with the detection ring 220. Several groups of torsion detection mechanisms 230 are evenly spaced along the top outer edge of the detection ring 220.

[0042] For example, Figure 3 As shown, the torsion detection mechanism 230 includes a mounting frame 231, which is mounted on the edge of the top outer wall of the detection ring 220. A second electric slide 232 is mounted horizontally on the top of the mounting frame 231. The second electric slide 232 extends horizontally from an end close to the detection ring 220 to an end away from the detection ring 220. A first servo motor 233 is connected to the output end of the second electric slide 232 in a transmission manner. A rocking arm 234 is connected to the top of the first servo motor 233 in a vertical transmission manner. The rocking arm 234 has one end of a plurality of extension rods 235 distributed in a circular array on the side walls thereof. The other ends of the extension rods 235 extend horizontally away from the rocking arm 234, and a torsion hammer 236 is mounted at the end.

[0043] First, the opening of the plastic packaging bag is upwardly sleeved onto the multi-directional detection unit 400, and then the opening of the plastic packaging bag is fixed to the fixing unit 300. Then, the multi-directional detection unit 400 is started to prop up the plastic packaging bag from the inside out. Then, the first electric slide 210 is started, and the detection ring 220 is driven to rise to the height of the plastic packaging bag as a whole through the first electric slide 210. Then, each group of second electric slides 232 is started, and each group of torsion hammers 236 is driven to move horizontally toward one side of the plastic packaging bag through the second electric slides 232. Then, the first servo motor 233 is started, and each group of torsion hammers 236 is driven to perform circular motion through the first servo motor 233, and they slide and fit with the outer wall of the plastic packaging bag in turn, thereby increasing the pulling force on the plastic packaging bag in the horizontal direction, thereby enriching the detection items and improving the detection effect of the device.

[0044] For example, Figure 4 、 Figure 5 and Figure 6 As shown, the fixing unit 300 includes an upper mounting tube 310. Several groups of first chutes 311 are arranged in a circular array on the sidewalls surrounding the upper mounting tube 310. Two groups of second chutes 312 are symmetrically located on either side of the first chutes 311. A first electric push rod 320 is mounted at the center of the top inner wall of the upper mounting tube 310. A lifting column 330 is connected to the bottom of the first electric push rod 320 in a driving manner. Several groups of fixing plates 331 are arranged in a circular array on the sidewalls surrounding the lifting column 330, equal in number to the number of first chutes 311. A first crossbar 340 is slidably connected within the first chutes 311. One end of the first crossbar 340 is mounted on a corresponding set of fixing plates 331. The other end of the first crossbar 340 extends outside the upper mounting tube 310 and is movably mounted with a second crossbar 350.

[0045] Specifically, a set of fixing bolts 341 are movably installed at both side edges of each set of the fixing plates 331 , and the other ends of the fixing bolts 341 extend to the outside of the upper mounting cylinder 310 through a corresponding set of second sliding grooves 312 .

[0046] Specifically, a crescent plate 360 ​​is mounted on the end of the second crossbar 350 away from the first crossbar 340. Several groups of fixed teeth 361 are evenly spaced at the bottom of the crescent plate 360. A fixed ring 370 is located below the upper mounting tube 310, with the central axis of the fixed ring 370 coinciding with the central axis of the upper mounting tube 310. Several groups of fixed grooves 371 are arranged in an annular array on the top of the fixed ring 370, and each group of fixed teeth 361 is movably engaged within a corresponding group of fixed grooves 371.

[0047] After the opening of the plastic packaging bag is sleeved on the multidirectional detection unit 400 upward, the opening of the plastic packaging bag is reversely sleeved on the top of the fixing ring 370, and then the first electric push rod 320 is started. The first electric push rod 320 drives the lifting column 330 to descend, so that each group of crescent plates 360 descends, and each group of fixing teeth 361 is clamped in the corresponding fixing groove 371 respectively, so that the stability of the plastic packaging bag during detection is improved, and the plastic packaging bag is prevented from falling off due to tension. Each group of crescent plates 360 can be disassembled, and the second cross rod 350 is only taken off from the first cross rod 340, then the fixing bolt 341 is disassembled, and the fixing plate 331 is taken out. The plastic packaging bag can be detected under the condition that the stress on the top is uneven, that is, the functionality of the device is enriched, and the convenience of later maintenance is improved.

[0048] As shown in examples Figure 7 、 Figure 8 and Figure 9 , the multidirectional detection unit 400 comprises a lower mounting cylinder 410, the bottom of the lower mounting cylinder 410 is communicated with an operation cylinder 420, and the bottom of the operation cylinder 420 is communicated with an outlet pipe 430. The diameter of the operation cylinder 420 is greater than that of the lower mounting cylinder 410 and the outlet pipe 430, and the ports at the upper and lower ends of the operation cylinder 420 are both arc surfaces 421.

[0049] Specifically, the second servo motor 440 is arranged at the center of the inner wall of the top of the lower mounting cylinder 410, the first lead screw 441 is connected to the bottom of the second servo motor 440 in a vertical direction, the first lead screw 441 extends to the operation cylinder 420 at the bottom, and the isolation block 442 is arranged on the first lead screw 441. The second lead screw 443 is arranged on the bottom of the isolation block 442 in a vertical direction, and the screw direction of the second lead screw 443 is opposite to that of the first lead screw 441. A group of fourth sliding blocks 444 are threadedly connected to the second lead screw 443 and the first lead screw 441, a group of push blocks 445 are sleeved on the two groups of fourth sliding blocks 444, and the opposite two side walls of the two groups of push blocks 445 are inclined surfaces.

[0050] Specifically, a group of third sliding grooves 422 are arranged on one side of the second lead screw 443 and the first lead screw 441, the third sliding blocks 423 are slidably connected in the third sliding grooves 422, and the two groups of push blocks 445 are connected with the two groups of third sliding blocks 423 respectively.

[0051] Specifically, the bottom of the lower group of fourth sliding blocks 444 is connected with the butt joint rod 460, the butt joint rod 460 penetrates into the outlet pipe 430 at the bottom, and the lower rod 470 is connected to the butt joint rod 460. The bottom of the lower rod 470 penetrates into the outlet pipe 430 directly below, and the lower pressing strip 480 arranged horizontally is arranged on the lower rod 470.

[0052] Furthermore, the first screw rod 441 , the isolation block 442 , the second screw rod 443 , the two groups of push blocks 445 , the two groups of inclined surfaces, the two groups of third slide grooves 422 and the two groups of third sliders 423 are combined to form a multi-directional pushing component.

[0053] Specifically, a plurality of plate feed mechanisms 450 are arranged in a circular array on each of the two sets of curved surfaces 421. These plate feed mechanisms 450 are arranged at an angle, with their bottoms slidingly attached to the corresponding set of inclined surfaces. The tops of these plate feed mechanisms 450 extend outside the operating cylinder 420 and are fitted with radial pressure plates 490 with a fan-shaped cross-section. Several sets of these radial pressure plates 490 form a spherical structure.

[0054] For example, Figure 10 and Figure 11 As shown, the plate feeding mechanism 450 includes an outer cylinder 451, which is tilted and mounted on a corresponding set of arc surfaces 421. A pestle rod 452 is provided in the outer cylinder 451, and a return spring 453 is sleeved on the pestle rod 452. A spring push block 454 is provided at the bottom of the return spring 453, and the spring push block 454 is mounted on the pestle rod 452. The outer diameter of the spring push block 454 and the return spring 453 is larger than the inner diameter of the outlets at both ends of the outer cylinder 451. The bottom of the pestle rod 452 extends into the operating cylinder 420 and slides on the corresponding set of inclined surfaces. The top of the pestle rod 452 extends to the outside of the outer cylinder 451 and is connected to a corresponding set of radiation pressure plates 490.

[0055] After the plastic bag is sleeved and secured, the second servo motor 440 is activated, driving the first and second screws 441 and 443 to rotate simultaneously. Because the threads of the two screws run in opposite directions, the two sets of push blocks 445 move away from each other in opposite directions. The two sets of inclined surfaces, in sliding engagement with their respective sets of pestle rods 452, cause the pestle rods 452 to move outward along the inclined path of the outer cylinder 451. This causes the radial pressure plates 490 to spread radially in all directions, propping up the plastic bag from within. The extent of the propping-up is then used to measure the bag's toughness. Simultaneously, the fourth slider 444 below descends, pushing the lower pressure bar 480 downward, applying a force from the bottom of the plastic bag. Combined with the radially spreading movement of the plastic bag, this achieves all-around pressure on the plastic bag. This avoids detection bottlenecks and improves detection accuracy.

[0056] The above embodiment has the following beneficial effects:

[0057] 1. By simultaneously rotating the first and second screw rods 441, 443, which have opposite thread directions, the two sets of push blocks 445 move vertically in opposite directions. The two sets of inclined surfaces slide in contact with the corresponding sets of pestle rods 452, causing the pestle rods 452 to move outward along the inclined path of the outer cylinder 451. This allows the radial pressure plates 490 to spread radially in all directions, supporting the plastic bag from the inside. Meanwhile, the lower fourth slider 444 lowers, pushing down the lower pressure bar 480 and applying a force from the bottom of the plastic bag. Combined with the radially spreading plastic bags, this achieves all-around pressure on the plastic bag. This avoids detection busy spots and improves detection accuracy.

[0058] 2. The opening of the plastic packaging bag is then reversely sleeved on the top of the fixing ring 370. The first electric push rod 320 is then activated, and the lifting column 330 is driven downward by the first electric push rod 320, thereby causing each group of crescent plates 360 to descend until each group of fixing teeth 361 is respectively engaged in its corresponding group of fixing grooves 371. This improves the stability of the plastic packaging bag during inspection and prevents it from falling off due to tension.

[0059] 3. Each set of crescent plates 360 can be disassembled by simply removing the second crossbar 350 from the first crossbar 340, then removing the fixing bolts 341 and taking out the fixing plate 331. This allows plastic packaging bags to be inspected even when uneven force is applied to the top, enriching the functionality of the device and improving the convenience of subsequent maintenance.

[0060] 4. Activate each set of second electric slides 232, which drive each set of torsion hammers 236 to move horizontally toward the side of the plastic bag. Then, activate the first servo motor 233, which drives each set of torsion hammers 236 to perform circular motion, sliding against the outer wall of the plastic bag in turn. This increases the horizontal pulling force on the plastic bag, enriching the detection options and improving the detection effectiveness of the device.

[0061] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the toughness strength of a plastic packaging bag, comprising a fixing unit (300), characterized in that: A multi-directional detection unit (400) is installed at the bottom of the fixing unit (300); the multi-directional detection unit (400) comprises a lower mounting cylinder (410), the bottom of the lower mounting cylinder (410) is connected to an operating cylinder (420); the diameter of the operating cylinder (420) is larger than that of the lower mounting cylinder (410), and the upper and lower ends of the operating cylinder (420) are both configured as arc surfaces (421); A plurality of plate-feeding mechanisms (450) are distributed in a ring array on both groups of the arc surfaces (421), and the plate-feeding mechanisms (450) are tilted; a multi-directional pushing component is provided in the operating cylinder (420); a plurality of plate-feeding mechanisms (450) are distributed in a ring array on both groups of the arc surfaces (421), and the plate-feeding mechanisms (450) are tilted, and one end of the plate-feeding mechanism is connected to the multi-directional pushing component in a transmission manner; the top of the plate-feeding mechanism (450) extends to the outside of the operating cylinder (420) and is installed with a radiation pressure plate (490); a plurality of groups of the radiation pressure plates (490) are combined to form a spherical structure; the bottom of the multi-directional pushing component is connected to a lower pressure strip (480); The external detection unit (200) includes a detection ring (220), the detection ring (220) is an elliptical ring structure, a first electric slide (210) is provided on one side of the detection ring (220) in a vertical direction, and an output end of the first electric slide (210) is transmission-connected to the detection ring (220); a plurality of torsion detection mechanisms (230) are arranged at equal intervals at the edge of the top outer wall of the detection ring (220); The torsion detection mechanism (230) includes a mounting frame (231), the mounting frame (231) is mounted at the edge of the top outer wall of the detection ring (220), and a second electric slide (232) is mounted on the top of the mounting frame (231) in a horizontal direction, and the second electric slide (232) extends horizontally from an end close to the detection ring (220) to an end away from the detection ring (220); The output end of the second electric slide (232) is connected to a first servo motor (233), and the top of the first servo motor (233) is connected to a rocking arm (234) in a vertical direction. One end of a plurality of groups of extension rods (235) are distributed in a circular array on the side walls around the rocking arm (234), and the other end of the extension rod (235) extends horizontally in a direction away from the rocking arm (234), and a torsion hammer (236) is installed at the end. The multi-directional pushing component includes a first screw rod (441), the top of the first screw rod (441) is connected to a second servo motor (440), the bottom of the first screw rod (441) extends into the operating cylinder (420) and is installed with an isolation block (442); a second screw rod (443) is installed in a vertical direction at the bottom of the isolation block (442), and the thread direction of the second screw rod (443) and the first screw rod (441) are opposite; A set of fourth sliders (444) are threadedly connected to the second screw rod (443) and the first screw rod (441), and a set of push blocks (445) are sleeved on the two sets of fourth sliders (444), and the two opposite side walls of the two sets of push blocks (445) are both inclined surfaces; One end of each set of the plate feeding mechanism (450) located in the operating cylinder (420) is slidably fitted on a corresponding set of inclined surfaces; a set of third sliding grooves (422) are provided on one side of the second screw rod (443) and the first screw rod (441), and a third slider (423) is slidably connected in the third sliding groove (422), and the two sets of pushing blocks (445) are respectively connected to the two sets of third sliders (423); The multi-directional pushing components drive each group of radial pressure plates (490) and the lower pressure strip (480) to move radially in all directions, thereby performing an all-round toughness test on the plastic packaging bag.

2. A plastic packaging bag toughness strength testing device according to claim 1, characterized in that: The detection device further comprises a detection platform (100), an external detection unit (200) is provided directly above the detection platform (100), and the external detection unit (200) is located directly below the multi-directional detection unit (400).

3. The device for testing the toughness and strength of plastic packaging bags according to claim 1, characterized in that: The fixing unit (300) comprises an upper mounting cylinder (310), and a plurality of first chutes (311) are distributed in an annular array on the side walls around the upper mounting cylinder (310), and two groups of second chutes (312) are symmetrically provided on both sides of the first chutes (311); a first electric push rod (320) is installed at the center of the inner wall at the top of the upper mounting cylinder (310), and a lifting column (330) is connected to the bottom of the first electric push rod (320) in a transmission manner, and a plurality of fixing plates (331) are distributed in an annular array on the side walls around the lifting column (330), the number of which is the same as the number of the first chutes (311).

4. A plastic packaging bag toughness strength testing device according to claim 3, characterized in that: A first cross bar (340) is slidably connected in the first sliding groove (311), one end of the first cross bar (340) is mounted on a corresponding set of fixed plates (331), the other end of the first cross bar (340) extends to the outside of the upper mounting tube (310), and a second cross bar (350) is movably mounted thereon; a set of fixing bolts (341) are movably mounted on the edges of both sides of each set of fixed plates (331), and the other end of the fixing bolts (341) extends to the outside of the upper mounting tube (310) through a corresponding set of second sliding grooves (312).

5. The device for testing the toughness and strength of plastic packaging bags according to claim 4, characterized in that: A crescent plate (360) is installed at an end of the second crossbar (350) away from the first crossbar (340), and a plurality of groups of fixed teeth (361) are arranged at equal intervals at the bottom of the crescent plate (360); a fixed ring (370) is provided below the upper mounting tube (310), and the central axis of the fixed ring (370) coincides with the central axis of the upper mounting tube (310); a plurality of groups of fixed grooves (371) are distributed in an annular array on the top of the fixed ring (370), and each group of the fixed teeth (361) is movably engaged in a corresponding group of fixed grooves (371).

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