Strength calibrating device for food packaging box

Abstract

The utility model provides a strength calibrating device for a food packaging box, which relates to the technical field of packaging box strength detection, and comprises a calibrating assembly, the calibrating assembly is composed of a pressure mechanism and a simulation mechanism and has two detection functions and modes, one is a continuous pressure detection mode, and the other is a continuous pressure detection mode; in the first mode, pressure can be continuously applied to a to-be-tested packaging box to realize static pressure testing of the packaging box, and in the second mode, a simulation mechanism can store energy and impact a pressure mechanism to simulate external force applied to the packaging box during falling or impact, and the simulation force can be freely regulated and controlled. The to-be-tested packaging box does not need an up-down displacement test, and a counterweight does not need to be installed in the packaging box, so that the problems that an existing strength calibrating device is not provided with a drop impact simulation test structure, the real test speed is low, counterweights with corresponding weights need to be placed in the packaging box during simulation tests of different specifications, and the test is very tedious are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging box strength detection, in particular to a strength detection device for food packaging boxes. Background Art

[0002] Food packaging boxes are boxes used for storing, transporting and selling food. Currently, most food packaging boxes are made of cardboard. In order to ensure the stability of food during logistics, transportation and carrying, the packaging boxes need to have a certain strength to protect the food inside. Therefore, food packaging boxes need to undergo strength testing during production and research and development to ensure that the packaging boxes produced and used can stably protect the food stored inside.

[0003] As for the existing strength testing devices for food packaging boxes, they do not have a simulated drop impact test structure. Currently, when performing a drop impact test on the packaging box, the packaging box needs to be lifted to a certain height and then released to simulate its falling process. Due to the long up and down movement stroke, the test rate is slow, and when performing simulation tests of different specifications, it is necessary to place counterweights of corresponding weights in the packaging box, which is very cumbersome, has poor flexibility and is not very practical. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a strength testing device for a food packaging box to solve the problems mentioned in the above background technology.

[0005] In a first aspect of the present disclosure, a strength testing device for a food packaging box is provided, specifically comprising: a frame assembly, the frame assembly comprising a testing platform, a supporting frame and an electric push rod a, the supporting frame being fixedly mounted on the side of the testing platform, and the electric push rod a being fixedly mounted on the top of the supporting frame; and a testing assembly, the testing assembly comprising a pressure mechanism and a simulation mechanism;

[0006] The pressure mechanism includes a pressure plate, a follower plate, a positioning screw and a connecting column, the follower plate is plugged into the top of the pressure plate, the bottom end of the positioning screw is rotatably connected to the inside of the pressure plate, and the positioning screw is screwed into the inside of the follower plate through a rod body thread, the bottom of the connecting column is plugged into the inside of the follower plate, and the top end of the connecting column is fixedly installed on the bottom end of the electric push rod a;

[0007] The simulation mechanism includes a simulation seat, a follower seat, a trigger block, a synchronization block and an electric push rod b. The simulation seat is plugged into the top of the pressure plate, and the simulation seat is located at the bottom of the follower plate, the follower seat is plugged into the inside of the simulation seat, and the trigger block is plugged into the inside of the follower seat, the synchronization block is plugged into the inside of the simulation seat, the bottom end of the electric push rod b is fixedly connected to the top of the pressure plate, and the top end of the electric push rod b is fixedly installed on the bottom of the follower seat.

[0008] Furthermore, a avoidance tube is provided on the top of the follower plate, and an observation groove is provided on the side of the avoidance tube. The column cross-section of the connecting column is in an "I" shape, and the bottom of the connecting column is inserted into the inside of the avoidance tube.

[0009] Furthermore, a force-bearing seat is provided on the top of the pressure plate, and an energy-storage tension spring is sleeved on the outside of the force-bearing seat, and two ends of the energy-storage tension spring are respectively fixedly connected to the top of the pressure plate and the bottom of the simulation seat.

[0010] Furthermore, a synchronous top spring is provided inside the synchronous block, and two ends of the synchronous top spring respectively abut against the inside of the synchronous block and the simulation seat.

[0011] Furthermore, a synchronous groove is provided on the side of the follower seat, and the cross section of the block at one end of the synchronous block is a right triangle, and the block with the triangular cross section of the synchronous block is inserted into the synchronous groove.

[0012] Furthermore, a resistance plate is provided on the side of the trigger block, and the bottom of the resistance plate is designed with an inclined chamfer. When the trigger block moves up and down inside the follower seat, the resistance plate will invade the slot space of the synchronization groove, and the plate width of the resistance plate is smaller than the slot width of the synchronization groove.

[0013] Furthermore, a separation top spring is provided inside the trigger block, and the two ends of the separation top spring respectively abut against the inside of the trigger block and the inside of the simulation seat. Under the action of the separation top spring, when the trigger block is not resisted or squeezed by external force, the resistance plate is located on the top of the synchronization block.

[0014] Furthermore, a resistance switch is provided on the side of the trigger block, and the resistance switch is fixedly installed on the side of the trigger block. The extension and contraction of the electric push rod b are controlled by independent circuits. The resistance switch is arranged in the extension circuit of the electric push rod b, and the extension circuit of the electric push rod b will be closed when the resistance switch is resisted.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The calibration component has two detection functions and modes. One is the continuous pressure detection mode, in which pressure can be continuously applied to the package box to be tested, thereby realizing static pressure testing of the package box. The other is the simulation detection mode. In this mode, the simulation mechanism can store energy and impact the pressure mechanism to simulate the external force exerted on the package box when it falls or collides, and the simulation force can be freely adjusted. The package box to be tested does not need to be tested by up and down displacement, and there is no need to install counterweights inside. The detection and calibration are fast and convenient, with extremely high efficiency, which improves the flexibility, adaptability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0018] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0022] Figure 3 This utility model Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0023] Figure 4 It is a structural schematic diagram of the utility model after the pressure mechanism is disassembled.

[0024] Figure 5 It is a schematic diagram of the structure of the simulation mechanism of the utility model after being disassembled.

[0025] Figure 6 It is a schematic diagram of the internal structure when the utility model performs static pressure test on a packaging box.

[0026] Figure 7 This utility model Figure 6 Schematic diagram of the enlarged structure of part B in the middle.

[0027] Figure 8 It is a structural schematic diagram of the connection column being located in the inner space of the avoidance cylinder when the utility model performs a simulated drop impact test on a packaging box.

[0028] Fig. 9 This utility model Figure 8 Schematic diagram of the internal structure when the electric push rod b is extended.

[0029] Fig.10 This utility model Figure 8 Schematic diagram of the internal structure of the verification component when the synchronization block escapes from the synchronization groove.

[0030] Fig.11 This utility model Fig.10 Schematic diagram of the enlarged structure of part C in the middle.

[0031] Fig.12 This utility model Fig.10 Schematic diagram of the internal structure when the simulated seat hits the force-bearing seat.

[0032] Reference numerals list

[0033] 1. Frame assembly; 101. Calibration table; 102. Support stand; 103. Electric push rod a;

[0034] 2. Pressure mechanism; 201. Pressure plate; 2011. Force bearing seat; 2012. Energy storage tension spring; 202. Follower plate; 2021. Avoidance cylinder; 203. Positioning screw; 204. Connecting column;

[0035] 3. Simulation mechanism; 301. Simulation seat; 302. Follower seat; 3021. Synchronous groove; 303. Trigger block; 3031. Separation top spring; 3032. Contact plate; 3033. Contact switch; 304. Synchronous block; 3041. Synchronous top spring; 305. Electric push rod b. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Please refer to Figures 1 to 12 As shown:

[0038] The utility model provides a strength testing device for food packaging boxes, including a frame assembly 1, the frame assembly 1 includes a testing platform 101, a supporting frame 102 and an electric push rod a103, the supporting frame 102 is fixedly installed on the side of the testing platform 101, and the electric push rod a103 is fixedly installed on the top of the supporting frame 102; and also includes a testing component, the testing component is composed of a pressure mechanism 2 and a simulation mechanism 3;

[0039] The pressure mechanism 2 includes a pressure plate 201, a follower plate 202, a positioning screw 203 and a connecting column 204. The follower plate 202 is plugged into the top of the pressure plate 201, the bottom end of the positioning screw 203 is rotatably connected to the inside of the pressure plate 201, and the positioning screw 203 is screwed into the inside of the follower plate 202 through the rod body thread, the bottom of the connecting column 204 is plugged into the inside of the follower plate 202, and the top end of the connecting column 204 is fixedly installed on the bottom end of the electric push rod a103;

[0040] The simulation mechanism 3 includes a simulation seat 301, a follower seat 302, a trigger block 303, a synchronization block 304 and an electric push rod b305. The simulation seat 301 is plugged into the top of the pressure plate 201, and the simulation seat 301 is located at the bottom of the follower plate 202. The follower seat 302 is plugged into the inside of the simulation seat 301, and the trigger block 303 is plugged into the inside of the follower seat 302. The synchronization block 304 is plugged into the inside of the simulation seat 301. The bottom end of the electric push rod b305 is fixedly connected to the top of the pressure plate 201, and the top end of the electric push rod b305 is fixedly installed at the bottom of the follower seat 302.

[0041] In the embodiment of the present disclosure, a avoidance tube 2021 is provided on the top of the follower plate 202, and an observation groove is provided on the side of the avoidance tube 2021. The column cross-section of the connecting column 204 is in an "I" shape, and the bottom of the connecting column 204 is plugged into the inside of the avoidance tube 2021. In use, the static pressure test of the food packaging box can be realized through the pressure mechanism 2. It is easy to use. The packaging box to be tested is placed on the calibration platform 101, and the pressure mechanism 2 can be driven up and down by the electric push rod a103 to apply pressure to the packaging box to be tested for testing. During the test, the pressure can be continuously increased or the current test pressure can be kept unchanged. A variety of static pressure test items can be simulated. It is flexible and convenient to use. When the pressure plate 201 does not contact the packaging box, the pressure mechanism 2 is under the action of its own weight, and the bottom end of the connecting column 204 is against the top wall inside the avoidance tube 2021. Under the action of the positioning screw 203, the pressure plate 201 and the follower plate 202 are fixed with a spacing. The pressure plate 201 and the follower plate 202 are fixed so that the pressure plate 201 and the follower plate 202 can maintain an integral state. When the electric push rod a103 is extended, the pressure mechanism 2 moves downward as a whole until the pressure plate 201 hits the packaging box to be tested. The pressure plate 201 is hit by the packaging box to be tested and cannot move further downward. Thereafter, the connecting column 204 continues to move downward under the extension of the electric push rod a103. The bottom of the connecting column 204 can move downward inside the inner cavity of the avoidance cylinder 2021 until the bottom of the connecting column 204 hits the bottom wall of the inner cavity of the avoidance cylinder 2021. At this time, the pressure effect of the electric push rod a103 will be transmitted to the pressure plate 201 through the connecting column 204 and the follower plate 202, and finally act on the packaging box to be tested. Different detection operations on the packaging box can be achieved by controlling the pressure of the electric push rod a103. It is flexible to use. After the detection is completed, the pressure mechanism 2 can be automatically reset after the electric push rod a103 is controlled to move upward, so as to be used for subsequent testing of the packaging box. The operation is convenient and flexible.

[0042] In the embodiment of the present disclosure, a synchronization top spring 3041 is provided inside the synchronization block 304, and the two ends of the synchronization top spring 3041 are respectively against the inside of the synchronization block 304 and the simulation seat 301, and a synchronization groove 3021 is provided on the side of the follower seat 302, and the block cross-section of one end of the synchronization block 304 is a right triangle, and the block of the triangular cross-section of the synchronization block 304 is inserted into the inside of the synchronization groove 3021. In use, the simulation mechanism 3 can store energy and impact the pressure mechanism 2, thereby simulating the external force exerted on the packaging box when it falls or hits, thereby realizing a drop impact test on the packaging box. The packaging box to be tested does not need to be tested by up and down displacement, and the test efficiency is extremely high. When it is necessary to perform a simulated drop impact test on the packaging box to be tested, the electric push rod a103 is controlled to extend so that the pressure After the force plate 201 hits the top of the packaging box, the use position of the connecting column 204 inside the avoidance tube 2021 is observed through the observation groove, so that the bottom of the connecting column 204 is located between the top wall and the bottom wall of the inner cavity of the avoidance tube 2021, providing a certain displacement distance for the pressure plate 201 and the follower plate 202 during subsequent collisions, ensuring the stability of the test and the accuracy of the results. After the above operations are completed, the simulation test can be carried out through the simulation mechanism 3. The electric push rod b305 can drive the follower seat 302 to move up synchronously when it is extended. When the follower seat 302 moves up, the synchronous groove 3021 can drive the simulation seat 301 to move up through the synchronous block 304. When the simulation seat 301 moves up, it can lengthen the energy storage spring 2012 to store energy. The side of the trigger block 303 is provided with a contact The bottom of the contact plate 3032 is designed with an inclined chamfer. When the trigger block 303 moves up and down inside the follower seat 302, the contact plate 3032 will invade the slot space of the synchronization slot 3021. The plate width of the contact plate 3032 is smaller than the slot width of the synchronization slot 3021. A separation top spring 3031 is provided inside the trigger block 303, and the two ends of the separation top spring 3031 respectively abut against the inside of the trigger block 303 and the inside of the simulation seat 301. Under the action of the separation top spring 3031, when the trigger block 303 is not subjected to external force, the contact plate 3032 is located at the top of the synchronization block 304. As the simulation seat 301 moves upward, the trigger block 303 will be blocked by the follower plate 202, so that the trigger block 303 is 2, it will move toward the inside of the follower seat 302 and compress the separation top spring 3031. During the movement of the trigger block 303, the contact plate 3032 will invade the internal space of the synchronization groove 3021, and the contact plate 3032 will resist and squeeze the synchronization block 304 under the action of the bottom inclined chamfer, so that the synchronization block 304 moves to one side to escape from the inside of the synchronization groove 3021 and compress the synchronization top spring 3041. After that, the overall relationship between the simulation seat 301 and the follower seat 302 is released, and under the action of the energy storage tension spring 2012, the simulation seat 301 will fall quickly to impact the force-bearing seat 2011, and the force-bearing seat 2011 can transmit the impact force to the pressure plate 201 and finally act on the packaging box, thereby realizing a simulated drop impact test of the packaging box.There is no need to move the packaging box up and down, the test efficiency is fast, the calibration process is simplified, and because the connecting column 204 leaves room for movement inside the avoidance tube 2021, if the packaging box cannot withstand the impact force, the pressure plate 201 will move down to deform the packaging box, and the test is stable. After the test is completed, the electric push rod b305 can be controlled to retract to achieve the reset operation of the calibration component, which is easy to operate.

[0043] In the disclosed embodiment, a force-bearing seat 2011 is provided on the top of the pressure plate 201, and an energy-storage tension spring 2012 is sleeved on the outside of the force-bearing seat 2011. The two ends of the energy-storage tension spring 2012 are respectively fixedly connected to the top of the pressure plate 201 and the bottom of the simulation seat 301. In use, when simulating the drop and impact detection of the packaging box, the simulation force can be freely adjusted, so that there is no need to install a counterweight inside the packaging box to be tested, which further improves the convenience of detection. The use distance between the pressure plate 201 and the follower plate 202 can be changed by positioning the screw 203. The change in the distance between the pressure plate 201 and the follower plate 202 changes the elongated length of the energy-storage tension spring 2012 when the trigger block 303 is resisted by the follower plate 202, that is, the impact force during impact. It is easy to adjust and flexible to use.

[0044] In the embodiment of the present disclosure, a resistance switch 3033 is provided on the side of the trigger block 303, and the resistance switch 3033 is fixedly installed on the side of the trigger block 303. The extension and contraction of the electric push rod b305 are controlled by independent circuits. The resistance switch 3033 is provided in the extension circuit of the electric push rod b305, and the extension circuit of the electric push rod b305 is closed when the resistance switch 3033 is resisted. In use, the maximum extension length of the electric push rod b305 can be limited by the resistance switch 3033. Since the use spacing between the pressure plate 201 and the follower plate 202 varies with the use, the electric push rod b305 can be extended to a certain extent. As the detection requirements change, when the trigger block 303 is resisted and moves toward the inside of the follower seat 302, the resist switch 3033 will be pressed by the resist, thereby closing the extension circuit of the electric push rod b305, preventing the electric push rod b305 from being over-extended during use and causing damage to the inspection component. The extension and contraction of the electric push rod b305 are controlled by independent circuits, so even if the resist switch 3033 cuts off the extension circuit of the electric push rod b305, it will not interfere with the on-off control of the contraction reset circuit of the electric push rod b305, thereby improving the stability of the device.

[0045] Specific usage and function of this embodiment: In the utility model, the static pressure test of the food packaging box can be realized through the pressure mechanism 2, which is easy to use. The packaging box to be tested is placed on the calibration table 101, and the pressure mechanism 2 can be driven to move up and down by the electric push rod a103 to apply pressure to the packaging box to be tested for testing. During the test, the pressure can be continuously increased or the current test pressure can be kept unchanged. A variety of static pressure test items can be simulated, and the use is flexible and convenient. When the pressure plate 201 does not contact the packaging box, the pressure mechanism 2 is under the action of its own weight, and the bottom end of the connecting column 204 is against the top wall inside the avoidance tube 2021, and under the action of the positioning screw 203, the pressure plate 201 and the follower plate 202 are used to The distance between them is fixed, so that the pressure plate 201 and the follower plate 202 can maintain an integral state. When the electric push rod a103 is extended, the pressure mechanism 2 moves downward as a whole until the pressure plate 201 hits the packaging box to be tested. The pressure plate 201 is hit by the packaging box to be tested and cannot move further downward. Thereafter, the connecting column 204 continues to move downward under the extension of the electric push rod a103. The bottom of the connecting column 204 can move downward inside the inner cavity of the avoidance cylinder 2021 until the bottom of the connecting column 204 hits the bottom wall of the inner cavity of the avoidance cylinder 2021. At this time, the pressure of the electric push rod a103 will be transmitted to the pressure plate 201 through the connecting column 204 and the follower plate 202, and finally act on the packaging box to be tested. The electric push rod a103 can be controlled to The pressure realizes different detection operations on the packaging box, and it is flexible to use. After the detection is completed, the pressure mechanism 2 can automatically reset after the electric push rod a103 is controlled to move up, so as to prepare for the subsequent testing of the packaging box. The simulation mechanism 3 can store energy and impact the pressure mechanism 2, thereby simulating the external force exerted on the packaging box when it falls or hits, so as to realize the drop impact test of the packaging box. The packaging box to be tested does not need to be tested by moving up and down, and the test efficiency is extremely high. When it is necessary to perform a simulated drop impact test on the packaging box to be tested, the electric push rod a103 is controlled to extend so that the pressure plate 201 contacts the top of the packaging box, and the use position of the connecting column 204 inside the avoidance tube 2021 is observed through the observation groove, so that the bottom of the connecting column 204 is located at the avoidance tube 2021. Between the top wall and the bottom wall of the inner cavity, a certain displacement distance is provided for the pressure plate 201 and the follower plate 202 during subsequent collisions, so as to ensure the stability of the test and the accuracy of the results. After the above operations are completed, the simulation test can be carried out through the simulation mechanism 3. When the electric push rod b305 is extended, it can drive the follower seat 302 to move up synchronously. When the follower seat 302 moves up, the synchronization groove 3021 can drive the simulation seat 301 to move up through the synchronization block 304. When the simulation seat 301 moves up, the energy storage tension spring 2012 can be stretched to store energy. As the simulation seat 301 moves up, the trigger block 303 will be blocked by the follower plate 202, so that the trigger block 303 will move toward the inside of the follower seat 302 and compress the separation top spring 3031 under the blocking effect of the follower plate 202.During the movement of the trigger block 303, the contact plate 3032 will invade the internal space of the synchronous groove 3021, and the contact plate 3032 will resist and squeeze the synchronous block 304 under the action of the bottom inclined chamfer, so that the synchronous block 304 moves to one side to escape from the interior of the synchronous groove 3021 and compress the synchronous top spring 3041. After that, the overall relationship between the simulation seat 301 and the follower seat 302 is released, and under the action of the energy storage tension spring 2012, the simulation seat 301 will fall quickly to impact the force-bearing seat 2011, and the force-bearing seat 2011 can transmit the impact force to the The pressure plate 201 is applied to the packaging box and finally acts on the packaging box, thereby realizing a simulated drop impact test on the packaging box. There is no need to move the packaging box up and down, the test efficiency is fast, and the verification process is simplified. In addition, since the connecting column 204 has a movable space inside the avoidance cylinder 2021, if the packaging box cannot withstand the impact force, the pressure plate 201 will move down to cause the packaging box to deform, and the test is stable. After the test is completed, the electric push rod b305 can be controlled to retract to realize the reset operation of the verification component. When simulating the drop impact test of the packaging box, the simulation force can be freely adjusted. , so that there is no need to install a counterweight inside the packaging box to be tested, which further improves the convenience of detection. The use distance between the pressure plate 201 and the follower plate 202 can be changed by positioning the screw 203. The change in the distance between the pressure plate 201 and the follower plate 202 changes the elongated length of the energy storage tension spring 2012 when the trigger block 303 is resisted by the follower plate 202, that is, the impact force during the impact. The maximum elongation length of the electric push rod b305 can be limited by the resistance switch 3033. Since the use distance between the pressure plate 201 and the follower plate 202 will As the detection requirements change, when the trigger block 303 is resisted and moves toward the inside of the follower seat 302, the resist switch 3033 will be resisted and pressed, thereby closing the extension circuit of the electric push rod b305, avoiding the phenomenon that the electric push rod b305 is over-extended during use and causing damage to the inspection component. The extension and retraction of the electric push rod b305 are controlled by independent circuits, so even if the resist switch 3033 cuts off the extension circuit of the electric push rod b305, it will not interfere with the on-off control of the retraction reset circuit of the electric push rod b305.

[0046] In this article, there are a few points to note:

[0047] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0048] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0049] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A strength testing device for food packaging boxes, include: A frame assembly (1), the frame assembly (1) comprising a test bench (101), a support stand (102) and an electric push rod a (103), the support stand (102) being fixedly mounted on a side of the test bench (101), and the electric push rod a (103) being fixedly mounted on a top of the support stand (102); characterized in that it also comprises a test assembly, the test assembly comprising a pressure mechanism (2) and a simulation mechanism (3); The pressure mechanism (2) comprises a pressure plate (201), a follower plate (202), a positioning screw (203) and a connecting column (204); the follower plate (202) is plugged into the top of the pressure plate (201); the bottom end of the positioning screw (203) is rotatably connected to the inside of the pressure plate (201); the positioning screw (203) is screwed to the inside of the follower plate (202) through a rod body thread; the bottom of the connecting column (204) is plugged into the inside of the follower plate (202); and the top end of the connecting column (204) is fixedly mounted on the bottom end of the electric push rod a (103); The simulation mechanism (3) comprises a simulation seat (301), a follower seat (302), a trigger block (303), a synchronization block (304) and an electric push rod b (305); the simulation seat (301) is plugged into the top of the pressure plate (201), and the simulation seat (301) is located at the bottom of the follower plate (202); the follower seat (302) is plugged into the interior of the simulation seat (301), and the trigger block (303) is plugged into the interior of the follower seat (302); the synchronization block (304) is plugged into the interior of the simulation seat (301); the bottom end of the electric push rod b (305) is fixedly connected to the top of the pressure plate (201), and the top end of the electric push rod b (305) is fixedly installed at the bottom of the follower seat (302).

2. A strength testing device for a food packaging box as claimed in claim 1, Features: The top of the follower plate (202) is provided with an avoidance cylinder (2021), and the side of the avoidance cylinder (2021) is provided with an observation groove, the column cross section of the connecting column (204) is in an "I" shape, and the bottom of the connecting column (204) is plugged into the inside of the avoidance cylinder (2021).

3. A strength testing device for a food packaging box as claimed in claim 2, Features: A force bearing seat (2011) is provided on the top of the pressure plate (201), and an energy storage tension spring (2012) is sleeved on the outside of the force bearing seat (2011), and two ends of the energy storage tension spring (2012) are respectively fixedly connected to the top of the pressure plate (201) and the bottom of the simulation seat (301).

4. A strength testing device for a food packaging box as claimed in claim 3, Features: A synchronous top spring (3041) is provided inside the synchronous block (304), and two ends of the synchronous top spring (3041) respectively abut against the inside of the synchronous block (304) and the simulation seat (301).

5. A strength testing device for a food packaging box as claimed in claim 4, Features: A synchronous groove (3021) is provided on the side of the follower seat (302), and a block body at one end of the synchronous block (304) has a right triangle cross section, and the block body of the synchronous block (304) with a triangular cross section is inserted into the synchronous groove (3021).

6. A strength testing device for a food packaging box as claimed in claim 5, Features: A contact plate (3032) is provided on the side of the trigger block (303), and the bottom of the contact plate (3032) is designed with an inclined chamfer. When the trigger block (303) moves up and down inside the follower seat (302), the contact plate (3032) will invade the groove body space of the synchronous groove (3021), and the plate body width of the contact plate (3032) is smaller than the groove body width of the synchronous groove (3021).

7. A strength testing device for a food packaging box as claimed in claim 6, Features: The trigger block (303) is provided with a separation top spring (3031) inside, and two ends of the separation top spring (3031) respectively abut against the inside of the trigger block (303) and the inside of the simulation seat (301). Under the action of the separation top spring (3031), when the trigger block (303) is not abutted or squeezed by an external force, the abutment plate (3032) is located on the top of the synchronization block (304).

8. A strength testing device for a food packaging box as claimed in claim 7, Features: A resistance switch (3033) is provided on the side of the trigger block (303), and the resistance switch (3033) is fixedly mounted on the side of the trigger block (303). The extension and contraction of the electric push rod b (305) are controlled by independent circuits. The resistance switch (3033) is arranged in the extension circuit of the electric push rod b (305), and the extension circuit of the electric push rod b (305) is closed when the resistance switch (3033) is resisted.

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