A device for testing the tensile strength of a bag

Abstract

This invention discloses a packaging bag tensile strength testing device, relating to the field of packaging bag production technology. It includes a base, a controller fixedly connected to one side of the base, and a lifting assembly fixedly connected to the top of the base. The lifting assembly includes a connecting plate, and a tensile measuring component fixedly connected to the bottom of the connecting plate. A testing mechanism is provided on one side of the lifting assembly. The testing mechanism includes a longitudinal strip cutting unit located on the top of the base. The longitudinal strip cutting unit is used to cut longitudinal strips of the packaging bag. This packaging bag tensile strength testing device, through the coordinated use of the longitudinal strip cutting unit, the transverse stress testing unit, and the positioning unit, avoids the cumbersome steps of manually cutting the strips and then clamping them for testing. It also enables simultaneous testing of the transverse and longitudinal tensile strength of the packaging bag, improving the testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of packaging bag production technology, specifically to a packaging bag tensile strength testing device. Background Technology

[0002] Packaging bags are containers used to hold products and facilitate transportation and storage. They are usually made of plastic, paper, metal, or other materials and can be designed in different shapes, sizes, and strengths to meet the different needs of the product. Packaging bags not only need to protect the product from the external environment but also facilitate display, carrying, and sales. To assess the durability of packaging bags during transportation, handling, and storage, and to ensure that the packaging will not break under certain forces, tensile strength tests are generally performed on the manufactured packaging bags.

[0003] When testing the tensile strength of packaging bags, it is usually necessary to manually cut the test strips, clamp them on the strength testing machine, and perform the tensile test. Moreover, it is not convenient to perform tensile tests in multiple directions at one time, which increases the cumbersomeness of manual operation and reduces the efficiency of testing the tensile strength of packaging bags.

[0004] Combining the above issues, we find that existing packaging bag tensile strength testing devices on the market are difficult to avoid all the problems mentioned above when in use. Even if they can solve the problems, they require external tools to solve them, thus failing to achieve the desired effect. Therefore, we propose a packaging bag tensile strength testing device. Summary of the Invention

[0005] The purpose of this invention is to provide a packaging bag tensile strength testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a packaging bag tensile strength testing device, comprising a base, a controller fixedly connected to one side of the base, a lifting assembly fixedly connected to the top of the base, the lifting assembly comprising a connecting plate disposed on the top of the base, a tensile measuring component fixedly connected to the bottom of the connecting plate, and a testing mechanism disposed on one side of the lifting assembly;

[0007] The testing mechanism includes a longitudinal strip cutting unit, which is disposed on the top of the base and is used to cut longitudinal strips of the packaging bag.

[0008] The testing mechanism includes a transverse stress testing unit, which is located at the bottom of the connecting plate. The transverse stress testing unit is used to test the transverse stress of the packaging bag and is used in conjunction with the longitudinal strip cutting unit.

[0009] The testing mechanism also includes two positioning units, which are symmetrically distributed on both sides of the transverse stress testing unit. The positioning units are used in conjunction with the transverse stress testing unit and the longitudinal strip cutting unit, and are used to perform interval positioning of the packaging bag.

[0010] Preferably, the longitudinal spline cutting unit includes two guide rods fixedly connected to the surface of the lifting assembly. One end of the two guide rods is fixedly connected to a support plate. A connecting plate is slidably connected to the surface of the two guide rods. An L-shaped rod is fixedly connected to the top of the base. A pressure plate is provided on one side of the L-shaped rod. A placement groove is formed on the surface of the pressure plate. A shaped electric guide rail is fixedly connected to the inner cavity of the placement groove. A fixing block that cooperates with the shaped electric guide rail is slidably connected to the inner cavity of the placement groove. A connecting rod is fixedly connected to one side of the fixing block. Two blades are fixedly connected to the side of the connecting rod near the support plate. A cutting groove that cooperates with the two blades is formed on the surface of the support plate. An electric gripper is fixedly connected to the bottom of the tensile measuring component. Both the shaped electric guide rail and the electric gripper are electrically connected to the controller.

[0011] Preferably, the inner wall of the L-shaped rod is threaded with a threaded rod, one end of which is rotatably connected to the inner wall of the pressure plate via a bearing, and the other end of which extends through to the outer side of the L-shaped rod and is fixedly connected to a knob.

[0012] Preferably, the inner wall of the L-shaped rod is fixedly connected to two telescopic rods, and the telescopic ends of the two telescopic rods are fixedly connected to one side of the pressure plate.

[0013] Preferably, the transverse stress testing unit includes a receiving groove formed on the surface of the support plate. A positioning cylinder is fixedly connected to the bottom of the receiving groove. A movable block is slidably connected to the inner cavity of the positioning cylinder. Two first mounting blocks are fixedly connected to the surface of the movable block. The two first mounting blocks are arranged opposite to each other. A first connecting strip is rotatably connected to the inner wall of each of the two first mounting blocks via a rotating shaft. A positioning block is rotatably connected to one end of each of the two first connecting strips via a rotating shaft. A second connecting strip is rotatably connected to the inner wall of the positioning block via a rotating shaft. Two second mounting blocks that cooperate with the second connecting strips are fixedly connected to the surface of the positioning cylinder. The second connecting strips are rotatably connected to the second mounting blocks via a rotating shaft. A pull rod is fixedly connected to the top of the movable block. The top of the pull rod is fixedly connected to the bottom of the connecting plate. A sliding hole that cooperates with the first mounting block is formed on the surface of the positioning block. A support block is fixedly connected to the surface of the support block. A pressure sensor is fixedly connected to the surface of the support block. The pressure sensor is electrically connected to the controller.

[0014] Preferably, anti-slip pads are fixedly connected to the surfaces of both of the support blocks. The anti-slip pads are made of silicone material, and the pressure sensor extends through to the outside of the anti-slip pads.

[0015] Preferably, a number of positioning buckles are fixedly connected to both sides of the support plate, and the positioning buckles are made of elastic metal material.

[0016] Preferably, the positioning unit includes a sliding block slidably connected to the top of the support plate. A contact rod is fixedly connected to one side of the sliding block, and one end of the contact rod is inclined. A pressing rod is fixedly connected to the surface of the movable block, and one end of the pressing rod is inclined to cooperate with the inclined surface of the contact rod. Two symmetrically arranged inclined grooves are opened on the top of the sliding block, and positioning rods are slidably connected to the inner cavities of the two inclined grooves. A connecting block is fixedly connected to the top of the positioning rods. A positioning frame is fixedly connected to the surface of the support plate, and telescopic tubes are fixedly connected to the inner wall of the positioning frame. There are two telescopic tubes, which are arranged opposite to each other. A clamping plate is fixedly connected to the telescopic ends of the two telescopic tubes. The bottom of the connecting block is fixedly connected to the top of the clamping plate. A first spring is slidably sleeved on the surface of the telescopic tube, and the two ends of the first spring are fixedly connected to the opposite sides of the clamping plate and the positioning frame, respectively.

[0017] Preferably, the top of the support plate is provided with a guide groove, the inner cavity of the guide groove is slidably connected to a guide block, the top of the guide block is fixedly connected to the bottom of the sliding block, the inner side of the guide groove is fixedly connected to a guide rod, the inner wall of the guide block is slidably connected to the surface of the guide rod, the inner side of the guide groove is fixedly connected to a second spring, one end of the second spring is fixedly connected to one side of the guide block, and the second spring is slidably sleeved on the surface of the guide rod.

[0018] Preferably, a movable groove is provided on one side of the support plate, the movable groove is connected to both the guide groove and the receiving groove, and a round rod is fixedly connected to the bottom of the guide block, with one end of the round rod fixedly connected to one side of the contact rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention, by setting a longitudinal strip cutting unit, can automatically cut the longitudinal strip of the packaging bag. Combined with the pressing pressure of the pressure plate and the pulling force of the electric gripper, it can automatically test the longitudinal tensile strength of the packaging bag, thereby avoiding the tedious steps of manually cutting the strip and then clamping and testing the strip, and improving the testing efficiency.

[0021] 2. This invention sets up a transverse stress testing unit, which expands the test area of ​​the packaging bag laterally by the relative expansion of two extrusion blocks, and monitors the pressure transmitted by the packaging bag when it is being extruded by a pressure sensor, thereby realizing the testing of the transverse stress of the packaging bag.

[0022] 3. By setting a positioning unit, this invention can squeeze and position the packaging bag fitted on the surface of the transverse stress testing unit, making the packaging bag in this section into a cylindrical shape, which facilitates the testing of the transverse stress of the packaging bag, thereby improving the testing efficiency of transverse stress. Through the coordinated use of the longitudinal strip cutting unit, the transverse stress testing unit and the positioning unit, the cumbersome steps of manually cutting the strip and then clamping and testing the strip are avoided, and the transverse and longitudinal tensile strength of the packaging bag can be tested simultaneously, thus improving the testing efficiency of the tensile strength of the packaging bag. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a partial three-dimensional schematic diagram of the longitudinal spline cutting unit of the present invention;

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a partial three-dimensional schematic diagram of the transverse stress testing unit of the present invention;

[0027] Figure 5 This is a three-dimensional schematic diagram of the movable groove and the round rod of the present invention;

[0028] Figure 6 This is a three-dimensional schematic diagram of the guide groove, guide block, guide rod, and second spring of the present invention;

[0029] Figure 7 This is a schematic diagram showing the connection between the first connecting strip, the positioning block, and the second connecting strip of the present invention;

[0030] Figure 8 This is a schematic diagram of the shape of the irregular electric guide rail of the present invention;

[0031] Figure 9 This is a partial three-dimensional schematic diagram of the positioning unit of the present invention.

[0032] In the diagram: 1. Base; 11. Controller; 12. Lifting assembly; 13. Connecting plate; 14. Tensile measuring component; 2. Testing mechanism; 21. Longitudinal strip cutting unit; 2101. Guide rod; 2102. Support plate; 2103. L-shaped rod; 2104. Pressure plate; 2105. Placement slot; 2106. Irregular electric guide rail; 2107. Fixing block; 2108. Connecting rod; 2109. Blade; 2110. Cutting slot; 2111. Electric gripper; 2112. Threaded rod; 2113. Knob; 2114. Telescopic rod; 22. Transverse stress testing unit; 2201. Receiving slot; 2202. Positioning cylinder; 2203. Movable block; 2204. First mounting block; 2205. First connecting... 2206. Connecting bar; 2207. Positioning block; 2208. Second connecting bar; 2209. Second mounting block; 22000. Pull-out rod; 2210. Sliding hole; 2211. Support block; 2212. Pressure sensor; 2213. Anti-slip pad; 2214. Positioning buckle; 23. Positioning unit; 2301. Sliding block; 2302. Contact rod; 2303. Extrusion rod; 2304. Inclined groove; 2305. Positioning rod; 2306. Connecting block; 2307. Clamping plate; 2308. Positioning frame; 2309. Telescopic tube; 2310. First spring; 2311. Guide groove; 2312. Guide block; 2313. Guide rod; 2314. Second spring; 2315. Moving groove; 2316. Round rod. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1-9This invention provides a technical solution: a packaging bag tensile strength testing device, including a base 1, a controller 11 fixedly connected to one side of the base 1, the controller 11 having a built-in display screen to display the tested strength value in real time, a lifting assembly 12 fixedly connected to the top of the base 1, the lifting assembly 12 including a connecting plate 13, the connecting plate 13 being disposed on the top of the base 1, the lifting assembly 12 also including a drive device, a guide rail and a protective frame, the drive device using a motor and a reducer to provide smooth and precise speed control, the guide rail ensuring stable vertical movement of the connecting plate 13, the protective frame protecting the drive device and the guide rail within its cavity, extending the service life of the drive device and the guide rail, the connecting plate 13 achieving vertical lifting through the drive device, a tensile measuring component 14 fixedly connected to the bottom of the connecting plate 13, the tensile measuring component 14 mainly including a sensor, capable of converting the deformation and force value of the packaging bag sample during the tensile process into an electrical signal for subsequent data processing and analysis, a testing mechanism 2 being provided on one side of the lifting assembly 12;

[0035] The testing mechanism 2 includes a longitudinal strip cutting unit 21, which is located on the top of the base 1. The longitudinal strip cutting unit 21 is used to cut the longitudinal strip of the packaging bag.

[0036] As a further limitation of the testing mechanism 2 of this invention, please refer to... Figures 1-4 and Figure 8 The longitudinal spline cutting unit 21 includes two guide rods 2101 fixedly connected to the surface of the lifting assembly 12. One end of the two guide rods 2101 is fixedly connected to a support plate 2102. A connecting plate 13 is slidably connected to the surface of the two guide rods 2101. An L-shaped rod 2103 is fixedly connected to the top of the base 1. A pressure plate 2104 is provided on one side of the L-shaped rod 2103. A placement groove 2105 is opened on the surface of the pressure plate 2104. A non-circular electric guide rail 2106 is fixedly connected to the inner cavity of the placement groove 2105. A fixing block 2107 that cooperates with the non-circular electric guide rail 2106 is slidably connected to the inner cavity of the placement groove 2105. A connecting rod 2108 is fixedly connected to one side of the fixing block 2107. The connecting rod 2108 is close to... Two blades 2109 are fixedly connected to one side of the support plate 2102. The surface of the support plate 2102 is provided with a cutting groove 2110 that works with the two blades 2109. An electric gripper 2111 is fixedly connected to the bottom of the tensile measuring component 14. The irregular electric guide rail 2106 and the electric gripper 2111 are both electrically connected to the controller 11. By setting the longitudinal strip cutting unit 21, the longitudinal strip of the packaging bag can be automatically cut. With the pressing force of the pressure plate 2104 and the pulling force of the electric gripper 2111, the longitudinal tensile strength of the packaging bag can be automatically tested, thereby avoiding the tedious steps of manually cutting the strip and then clamping the strip for testing, and improving the testing efficiency of the tensile strength of the packaging bag.

[0037] The inner wall of the L-shaped rod 2103 is threaded with a threaded rod 2112. One end of the threaded rod 2112 is rotatably connected to the inner wall of the pressure plate 2104 via a bearing. The other end of the threaded rod 2112 extends through to the outer side of the L-shaped rod 2103 and is fixedly connected to a knob 2113. By setting the threaded rod 2112 and the knob 2113, after the packaging bag is put on, the user rotates the knob 2113 to drive the threaded rod 2112 to rotate, causing the threaded rod 2112 to move on the inner wall of the L-shaped rod 2103, thereby driving the pressure plate 2104 to move closer to the surface of the support plate 2102, thus pressing the packaging bag.

[0038] Two telescopic rods 2114 are fixedly connected to the inner wall of the L-shaped rod 2103. The telescopic ends of the two telescopic rods 2114 are fixedly connected to one side of the pressure plate 2104. By setting the telescopic rods 2114, the pressure plate 2104 can be rotated and limited, preventing the rotation of the threaded rod 2112 from causing the pressure plate 2104 to rotate. Through the telescopicity of the telescopic rods 2114, the guide distance of the pressure plate 2104 can be extended and contracted, improving the stability of the pressure plate 2104 when it moves.

[0039] The specific implementation method of this embodiment is as follows: When conducting the tensile strength test of the packaging bag, firstly, the opening of the packaging bag is placed from the bottom of the support plate 2102 upwards. The support plate 2102 is positioned by two guide rods 2101. Then, the packaging bag is pulled upwards to move the opening of the packaging bag to the designated position, so that the rightmost side of the packaging bag is tightly against the right side of the support plate 2102, and the excess width of the packaging bag is placed on the left side of the support plate 2102. The user's right and left sides when facing the support plate 2102 are respectively... After the packaging bag is fitted on both the left and right sides, the user turns the knob 2113, causing the threaded rod 2112 to rotate. The rotation of the threaded rod 2112 causes it to displace on the inner wall of the L-shaped rod 2103, thereby moving the pressure plate 2104 to the surface of the support plate 2102. This pressures the packaging bag on the surface of the support plate 2102, achieving partial positioning of the packaging bag. The controller 11 then controls the lifting assembly 12 to lower the connecting plate 13 to the designated position, where the gripper portion of the electric gripper 2111 is slightly embedded in the packaging bag. Inside the cavity, the two grippers of the electric gripper 2111 are located on the front and rear sides of the front half of the packaging bag opening, respectively. Then, the controller 11 activates the electric gripper 2111 to clamp the upper end of the front half of the packaging bag. Subsequently, the controller 11 activates the irregularly shaped electric guide rail 2106, whose starting end is higher than the top of the packaging bag. When the irregularly shaped electric guide rail 2106 is activated, the fixing block 2107, guided by the irregularly shaped track, will move closer to the surface of the support plate 2102 by a certain distance. At this time, the fixing block... 2107 drives the connecting rod 2108 and the two blades 2109 to approach the packaging bag positioned on the surface of the support plate 2102. The cutting edges of the two blades 2109 move to the top of the packaging bag. Through the continued downward movement of the fixing block 2107 in the irregular electric guide rail 2106, the two blades 2109 are driven to cut the front half of the already positioned and tightened packaging bag along the opposite side of the cutting groove 2110 until the blades 2109 contact the inner bottom of the cutting groove 2110. At this time, the cutting of the longitudinal strip of the packaging bag is completed.

[0040] Example 2: Please refer to Figures 1-4 and Figure 7 The present invention provides a technical solution: a packaging bag tensile strength testing device. The present invention makes corresponding improvements to the technical problems mentioned in the background art. The testing mechanism 2 includes a transverse stress testing unit 22, which is disposed at the bottom of the connecting plate 13. The transverse stress testing unit 22 is used to test the transverse stress of the packaging bag. The transverse stress testing unit 22 is used in conjunction with the longitudinal strip cutting unit 21.

[0041] As a further definition of the testing mechanism 2 of the present invention, the transverse stress testing unit 22 includes a receiving groove 2201 formed on the surface of the support plate 2102. A positioning cylinder 2202 is fixedly connected to the bottom of the receiving groove 2201. A movable block 2203 is slidably connected to the inner cavity of the positioning cylinder 2202. Two first mounting blocks 2204 are fixedly connected to the surface of the movable block 2203. The two first mounting blocks 2204 are arranged opposite to each other. A first connecting strip 2205 is rotatably connected to the inner wall of each of the two first mounting blocks 2204 via a rotating shaft. A positioning block 2206 is rotatably connected to one end of each of the two first connecting strips 2205 via a rotating shaft. A second connecting strip 2207 is rotatably connected to the inner wall of the positioning block 2206 via a rotating shaft. Two second mounting blocks 2207 that cooperate with the second connecting strips 2207 are fixedly connected to the surface of the positioning cylinder 2202. 8. The second connecting strip 2207 is rotatably connected to the second mounting block 2208 via a rotating shaft. A pull rod 2209 is fixedly connected to the top of the movable block 2203. The top of the pull rod 2209 is fixedly connected to the bottom of the connecting plate 13. A sliding hole 2210 is opened on the surface of the positioning cylinder 2202 to cooperate with the first mounting block 2204. A support block 2211 is fixedly connected to the surface of the positioning block 2206. A pressure sensor 2212 is fixedly connected to the surface of the support block 2211. The pressure sensor 2212 is electrically connected to the controller 11. By setting up the transverse stress testing unit 22, the test area of ​​the packaging bag is laterally expanded by the relative expansion of the two support blocks 2211. The pressure value transmitted by the packaging bag when it is being expanded is monitored by the pressure sensor 2212, thereby realizing the test of the transverse stress of the packaging bag.

[0042] Both support blocks 2211 have anti-slip pads 2213 fixedly connected to their surfaces. The anti-slip pads 2213 are made of silicone material, and the pressure sensor 2212 extends through to the outside of the anti-slip pads 2213. By setting the anti-slip pads 2213, the friction between the support blocks 2211 and the packaging bag can be increased, thereby achieving more stable lateral expansion of the packaging bag.

[0043] Several positioning buckles 2214 are fixedly connected to both sides of the support plate 2102. The positioning buckles 2214 are made of elastic metal material. By setting the positioning buckles 2214, the opening of the packaging bag can be clamped and positioned, which increases the stability of the packaging bag when it is placed on the surface of the support plate 2102.

[0044] The specific implementation of this embodiment is as follows: When the packaging bag is placed on the surface of the support plate 2102, the support block 2211 of the transverse stress testing unit 22 is simultaneously wrapped into the inner cavity of the packaging bag. When the top of the packaging bag moves to the positioning buckle 2214, the user manually pulls the positioning buckle 2214, causing the positioning buckle 2214 to deform, creating a gap between the packaging bag and the support plate 2102. Then, the top of the packaging bag is moved into the gap, and the pulling of the positioning buckle 2214 is released. The positioning buckle 2214 resets to position the packaging bag, thereby ensuring that the opening of the packaging bag is slightly lower than the top of the support plate 2102, completing the longitudinal sampling of the packaging bag. After the strip is cut, the user activates the lifting assembly 12 via the controller 11, causing the connecting plate 13 to move upward. This upward movement of the connecting plate 13 drives the tensile measuring component 14 and the electric gripper 2111 to move upward. The electric gripper 2111 pulls the longitudinal strip of the packaging bag it clamps, and in conjunction with the tensile measuring component 14, transmits the tensile force value generated by the pull to the controller 11, thus testing the longitudinal tensile strength of the packaging bag. Simultaneously, the upward movement of the connecting plate 13 drives the pull rod 2209 to move upward. This upward movement of the pull rod 2209 causes the movable block 2203 to move upward within the positioning cylinder 2202. During this upward movement, the movable block 2203 drives the positioning unit 23, which in turn controls the lateral stress. The packaging bag fitted on the surface of the test unit 22 is pressed on both sides, so that the packaging bag fitted on the surface of the transverse stress test unit 22 forms a cylindrical shape. In the initial state, there is an angle between the first connecting strip 2205 and the second connecting strip 2207. The existence of this angle determines the direction of movement of the positioning block 2206, ensuring that the positioning block 2206 can only move to the outside of the positioning cylinder 2202. The upward movement of the movable block 2203 drives the first mounting block 2204 to move upward in the inner cavity of the sliding hole 2210. The upward movement of the first mounting block 2204 drives the first connecting strip 2205, which is rotatably connected to it, to rotate. At this time, through the positioning block 2206, the support block 2211, the second connecting strip 2207 and the second... The combined action of mounting blocks 2208 causes the angle between the first connecting strip 2205 and the second connecting strip 2207 to gradually decrease as the movable block 2203 moves upward. This causes the connection point between the first connecting strip 2205 and the second connecting strip 2207, i.e., the positioning block 2206, to gradually move away from the positioning cylinder 2202. This pushes the two supporting blocks 2211 away from the positioning cylinder 2202, thereby achieving lateral supporting of the packaging bag on its surface. During the supporting process, the packaging bag compresses the pressure sensor 2212, thereby achieving the test of the lateral stress of the packaging bag. This enables the simultaneous testing of the longitudinal and lateral stresses of the packaging bag, improving the testing efficiency of the packaging bag's tensile strength.

[0045] Example 3: Please refer to Figure 1 and Figures 4-6The present invention provides a technical solution: a packaging bag tensile strength testing device. The present invention makes corresponding improvements to the technical problems mentioned in the background art. The testing mechanism 2 also includes a positioning unit 23. There are two positioning units 23. The two positioning units 23 are symmetrically distributed on both sides of the transverse stress testing unit 22. The positioning unit 23 is used in conjunction with the transverse stress testing unit 22 and the longitudinal strip cutting unit 21. The positioning unit 23 is used to perform interval positioning of the packaging bag.

[0046] As a further limitation of the testing mechanism 2 of the present invention, the positioning unit 23 includes a sliding block 2301 slidably connected to the top of the support plate 2102. A contact rod 2302 is fixedly connected to one side of the sliding block 2301. One end of the contact rod 2302 is inclined. A pressing rod 2303 is fixedly connected to the surface of the movable block 2203. One end of the pressing rod 2303 is provided with an inclined surface that cooperates with the inclined surface of the contact rod 2302. Two symmetrically arranged inclined grooves 2304 are opened on the top of the sliding block 2301. A positioning rod 2305 is slidably connected to the inner cavity of each of the two inclined grooves 2304. A connecting block 2306 is fixedly connected to the top of the positioning rod 2305. A positioning frame 2308 is fixedly connected to the surface of the support plate 2102. The inner wall of the frame 2308 is fixedly connected with two telescopic tubes 2309, which are arranged opposite each other. The telescopic ends of the two telescopic tubes 2309 are fixedly connected with clamps 2307. The bottom of the connecting block 2306 is fixedly connected to the top of the clamps 2307. A first spring 2310 is slidably sleeved on the surface of the telescopic tube 2309. The two ends of the first spring 2310 are fixedly connected to the opposite sides of the clamps 2307 and the positioning frame 2308, respectively. By setting the positioning unit 23, the packaging bag sleeved on the surface of the transverse stress testing unit 22 can be squeezed and positioned, so that the packaging bag in this section is self-contained as a cylinder, which facilitates the testing of the transverse stress of the packaging bag, thereby improving the testing efficiency of transverse stress.

[0047] The top of the support plate 2102 is provided with a guide groove 2311. A guide block 2312 is slidably connected to the inner cavity of the guide groove 2311. The top of the guide block 2312 is fixedly connected to the bottom of the sliding block 2301. A guide rod 2313 is fixedly connected to the inner side of the guide groove 2311. The inner wall of the guide block 2312 is slidably connected to the surface of the guide rod 2313. A second spring 2314 is fixedly connected to the inner side of the guide groove 2311. One end of the second spring 2314 is fixedly connected to one side of the guide block 2312. The second spring 2314 is slidably sleeved on the surface of the guide rod 2313. By setting the guide groove 2311, guide block 2312, guide rod 2313 and second spring 2314 in cooperation, the movement trajectory of the sliding block 2301 is guided, the stability of the sliding block 2301 during movement is increased, and the automatic reset of the sliding block 2301 can be achieved by the reaction force of the second spring 2314.

[0048] A movable groove 2315 is provided on one side of the support plate 2102. The movable groove 2315 is connected to the guide groove 2311 and the receiving groove 2201. A round rod 2316 is fixedly connected to the bottom of the guide block 2312. One end of the round rod 2316 is fixedly connected to one side of the contact rod 2302. By setting the movable groove 2315 and the round rod 2316 in cooperation, the extrusion pressure at the lower end of the contact rod 2302 can be transmitted to the guide block 2312 through the round rod 2316, thereby realizing the extrusion of the sliding block 2301. The movable groove 2315 provides sufficient space for the lateral movement of the round rod 2316.

[0049] The specific implementation of this embodiment is as follows: When the transverse stress test begins, as the movable block 2203 moves upward, it drives the extrusion rod 2303 to move upward. The upward movement of the extrusion rod 2303 extrudes the surface of the contact rod 2302, causing the extrusion rod 2303 to gradually move away from the inclined surface of the contact rod 2302, resulting in a transverse displacement of the contact rod 2302. The transverse movement of the contact rod 2302 extrudes the sliding block 2301, causing the sliding block 2301 to move away from the transverse stress test unit 22. At this time, the sliding block 2301 is guided by the guide groove 2311, the guide block 2312, and the guide rod 2313, increasing the stability of the sliding block 2301 during movement. The movement of the sliding block 2301 drives the two inclined grooves 2304 at its top to move. The two inclined grooves 2304 are symmetrically arranged, so that one end of the two inclined grooves 2304 is close to each other and the other end is far away from each other. In the state of not positioning the packaging bag, the two Positioning rods 2305 are located in the inner cavities of the two inclined grooves 2304 at opposite ends. When the sliding block 2301 is pushed, guided by the inclined grooves 2304, the two positioning rods 2305 move closer to each other along the direction of the two inclined grooves 2304, thereby bringing the two connecting blocks 2306 closer together. The closer proximity of the two connecting blocks 2306 brings the two clamping plates 2307 closer together, thus making the clamping plates 2307 tightly adhere to the surface of the support plate 2102 to position the packaging bag. The clamping plates 2307 are elastically adjusted in terms of movement distance through the telescopic tube 2309 and the first spring 2310. The first spring 2310 can help the extension displacement of the telescopic tube 209 to be reset. Through the combined action of the two sets of positioning units 23, the packaging bag in the test area of ​​the transverse stress test unit 22 forms a cylindrical shape, providing a stable test area for the packaging bag for transverse stress testing and improving the testing efficiency of the packaging bag's tensile strength.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A packaging bag tensile strength testing device, comprising a base (1), a controller (11) fixedly connected to one side of the base (1), a lifting assembly (12) fixedly connected to the top of the base (1), the lifting assembly (12) comprising a connecting plate (13), the connecting plate (13) being disposed on the top of the base (1), and a tensile measuring element (14) fixedly connected to the bottom of the connecting plate (13), characterized in that: A testing mechanism (2) is provided on one side of the lifting assembly (12); The testing mechanism (2) includes a longitudinal strip cutting unit (21), which is located on the top of the base (1) and is used to cut the longitudinal strip of the packaging bag. The testing mechanism (2) also includes a transverse stress testing unit (22), which is located at the bottom of the connecting plate (13). The transverse stress testing unit (22) is used to test the transverse stress of the packaging bag. The transverse stress testing unit (22) is used in conjunction with the longitudinal strip cutting unit (21). The testing mechanism (2) also includes a positioning unit (23). There are two positioning units (23). The two positioning units (23) are symmetrically distributed on both sides of the transverse stress testing unit (22). The positioning unit (23) is used in conjunction with the transverse stress testing unit (22) and the longitudinal strip cutting unit (21). The positioning unit (23) is used to perform interval positioning of the packaging bag. The longitudinal strip cutting unit (21) includes two guide rods (2101) fixedly connected to the surface of the lifting assembly (12). One end of the two guide rods (2101) is fixedly connected to a support plate (2102). The connecting plate (13) is slidably connected to the surface of the two guide rods (2101). An L-shaped rod (2103) is fixedly connected to the top of the base (1). A pressure plate (2104) is provided on one side of the L-shaped rod (2103). A placement groove (2105) is opened on the surface of the pressure plate (2104). An irregular electric guide rail (2106) is fixedly connected to the inner cavity of the placement groove (2105). The inner cavity of 05) is slidably connected to a fixing block (2107) that works with the irregular electric guide rail (2106). A connecting rod (2108) is fixedly connected to one side of the fixing block (2107). Two blades (2109) are fixedly connected to the side of the connecting rod (2108) near the support plate (2102). A cutting groove (2110) is opened on the surface of the support plate (2102) to work with the two blades (2109). An electric gripper (2111) is fixedly connected to the bottom of the tension measuring component (14). The irregular electric guide rail (2106) and the electric gripper (2111) are both electrically connected to the controller (11).

2. The packaging bag tensile strength testing device according to claim 1, characterized in that: The inner wall of the L-shaped rod (2103) is threaded with a threaded rod (2112). One end of the threaded rod (2112) is rotatably connected to the inner wall of the pressure plate (2104) through a bearing. The other end of the threaded rod (2112) extends through to the outside of the L-shaped rod (2103) and is fixedly connected with a knob (2113).

3. The packaging bag tensile strength testing device according to claim 1, characterized in that: The inner wall of the L-shaped rod (2103) is fixedly connected to two telescopic rods (2114), and the telescopic ends of the two telescopic rods (2114) are fixedly connected to one side of the pressure plate (2104).

4. The packaging bag tensile strength testing device according to claim 1, characterized in that: The transverse stress testing unit (22) includes a receiving groove (2201) formed on the surface of the support plate (2102). A positioning cylinder (2202) is fixedly connected to the bottom of the receiving groove (2201). A movable block (2203) is slidably connected to the inner cavity of the positioning cylinder (2202). Two first mounting blocks (2204) are fixedly connected to the surface of the movable block (2203). The two first mounting blocks (2204) are arranged opposite to each other. The inner walls of the two first mounting blocks (2204) are rotatably connected to a first connecting strip (2205) via a rotating shaft. One end of each of the two first connecting strips (2205) is rotatably connected to a positioning block (2206) via a rotating shaft. The inner wall of the positioning block (2206) is rotatably connected to a second connecting strip (2207) via a rotating shaft. The surface of the positioning cylinder (2202) is fixedly connected to two second mounting blocks (2208) that cooperate with the second connecting strip (2207). The second connecting strip (2207) is rotatably connected to the second mounting block (2208) through a rotating shaft. The top of the movable block (2203) is fixedly connected to a pull rod (2209). The top of the pull rod (2209) is fixedly connected to the bottom of the connecting plate (13). The surface of the positioning cylinder (2202) is provided with a sliding hole (2210) that cooperates with the first mounting block (2204). The surface of the positioning block (2206) is fixedly connected to a support block (2211). The surface of the support block (2211) is fixedly connected to a pressure sensor (2212). The pressure sensor (2212) is electrically connected to the controller (11).

5. The packaging bag tensile strength testing device according to claim 4, characterized in that: The surfaces of the two support blocks (2211) are fixedly connected with anti-slip pads (2213), which are made of silicone material, and the pressure sensor (2212) extends through to the outside of the anti-slip pads (2213).

6. The packaging bag tensile strength testing device according to claim 1, characterized in that: Both sides of the support plate (2102) are fixedly connected with several positioning buckles (2214), which are made of elastic metal material.

7. The packaging bag tensile strength testing device according to claim 4, characterized in that: The positioning unit (23) includes a sliding block (2301) slidably connected to the top of the support plate (2102). A contact rod (2302) is fixedly connected to one side of the sliding block (2301). One end of the contact rod (2302) is inclined. A pressing rod (2303) is fixedly connected to the surface of the movable block (2203). One end of the pressing rod (2303) is provided with an inclined surface that cooperates with the inclined surface of the contact rod (2302). Two symmetrically arranged inclined grooves (2304) are opened on the top of the sliding block (2301). A positioning rod (2305) is slidably connected to the inner cavity of each of the two inclined grooves (2304). A connecting rod is fixedly connected to the top of the positioning rod (2305). The block (2306) has a positioning frame (2308) fixedly connected to the surface of the support plate (2102). The inner wall of the positioning frame (2308) is fixedly connected to a telescopic tube (2309). There are two telescopic tubes (2309), which are arranged opposite to each other. The telescopic ends of the two telescopic tubes (2309) are fixedly connected to a clamping plate (2307). The bottom of the connecting block (2306) is fixedly connected to the top of the clamping plate (2307). A first spring (2310) is slidably sleeved on the surface of the telescopic tube (2309). The two ends of the first spring (2310) are fixedly connected to the opposite sides of the clamping plate (2307) and the positioning frame (2308), respectively.

8. The packaging bag tensile strength testing device according to claim 4, characterized in that: The top of the support plate (2102) is provided with a guide groove (2311). A guide block (2312) is slidably connected to the inner cavity of the guide groove (2311). The top of the guide block (2312) is fixedly connected to the bottom of the sliding block (2301). A guide rod (2313) is fixedly connected to the inner side of the guide groove (2311). The inner wall of the guide block (2312) is slidably connected to the surface of the guide rod (2313). A second spring (2314) is fixedly connected to the inner side of the guide groove (2311). One end of the second spring (2314) is fixedly connected to one side of the guide block (2312). The second spring (2314) is slidably sleeved on the surface of the guide rod (2313).

9. The packaging bag tensile strength testing device according to claim 8, characterized in that: The support plate (2102) has a moving groove (2315) on one side, which is connected to the guide groove (2311) and the receiving groove (2201). A round rod (2316) is fixedly connected to the bottom of the guide block (2312), and one end of the round rod (2316) is fixedly connected to one side of the contact rod (2302).

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