Device for testing tensile strength of packaging bag

Abstract

The invention discloses a packaging bag tensile strength testing device, and relates to the technical field of packaging bag production, the packaging bag tensile strength testing device comprises a base, one side of the base is fixedly connected with a controller, the top of the base is fixedly connected with a lifting assembly, the lifting assembly comprises a connecting plate, the bottom of the connecting plate is fixedly connected with a tensile force measuring piece, and the tensile force measuring piece is fixedly connected with the controller. A testing mechanism is arranged on one side of the lifting assembly; the test mechanism comprises a longitudinal sample strip cutting unit, the longitudinal sample strip cutting unit is arranged at the top of the base, and the longitudinal sample strip cutting unit is used for cutting longitudinal sample strips of the packaging bag. Through cooperative use of the longitudinal spline cutting unit, the transverse stress testing unit and the positioning unit, the tedious steps of manual cutting of splines and clamping testing of the splines are avoided, transverse and longitudinal tensile strength testing of the packaging bag is achieved at the same time, and the testing efficiency of the tensile strength of the packaging bag is improved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bag production, in particular to a packaging bag tensile strength testing device. Background Art

[0002] A packaging bag is a container used to hold products for transportation and storage. It is usually made of plastic, paper, metal or other materials. It can be designed in different shapes, sizes and strengths according to the different needs of the product. The packaging bag should not only protect the product from the external environment, but also be easy to display, carry and sell. In order to evaluate the durability of the packaging bag during transportation, handling and storage, and to ensure that the packaging will not break when subjected to a certain force, the produced packaging bags are generally subjected to a tensile strength test.

[0003] When testing the tensile strength of packaging bags, it is usually necessary to manually cut the test specimens, clamp them on the strength testing machine, and perform the tensile test. It is not convenient to perform multi-directional tensile tests at one time, which increases the tediousness of manual operation and reduces the efficiency of the tensile strength test of packaging bags.

[0004] Combining the above problems, we will find that it is difficult to avoid the above problems at the same time when using the existing packaging bag tensile strength testing devices on the market, and even if they can be solved, they need to be solved with the cooperation of external tools, which cannot achieve the desired effect. Therefore, we propose a packaging bag tensile strength testing device. Summary of the invention

[0005] The object of the present invention is to provide a packaging bag tensile strength testing device to solve the problems raised in the above background technology.

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

[0007] The testing mechanism comprises a longitudinal spline cutting unit, which is arranged on the top of the base and is used to cut the longitudinal spline of the packaging bag;

[0008] The testing mechanism comprises a transverse stress testing unit, which is arranged at the bottom of the connecting plate and is used to test the transverse stress of the packaging bag, and is used in conjunction with the longitudinal spline cutting unit;

[0009] The testing mechanism also includes a positioning unit, and the number of the positioning units is two. The two positioning units are symmetrically distributed on both sides of the transverse stress testing unit. The positioning unit is used in conjunction with the transverse stress testing unit and the longitudinal spline cutting unit, and the positioning unit is used to perform interval positioning on 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 commonly fixedly connected to a support plate, the connecting plate is slidably connected to the surfaces of the two guide rods, the top of the base is fixedly connected to an L-shaped rod, one side of the L-shaped rod is provided with a pressure plate, the surface of the pressure plate is provided with a placement groove, the inner cavity of the placement groove is fixedly connected to a special-shaped electric guide rail, the inner cavity of the placement groove is slidably connected to a fixed block used in conjunction with the special-shaped electric guide rail, one side of the fixed block is fixedly connected to a connecting rod, two blades are fixedly connected to the side of the connecting rod close to the support plate, the surface of the support plate is provided with a cutting groove used in conjunction with the two blades, the bottom of the tension measuring piece is fixedly connected to an electric clamp, and the special-shaped electric guide rail and the electric clamp are both electrically connected to a controller.

[0011] Preferably, the inner wall of the L-shaped rod is threadedly connected to a threaded rod, one end of the threaded rod is rotatably connected to the inner wall of the pressure plate via a bearing, and the other end of the threaded rod passes through the outside of the L-shaped rod and is fixedly connected to a knob.

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

[0013] Preferably, the lateral stress testing unit includes a receiving groove opened on the surface of the supporting plate, the inner bottom of the receiving groove is fixedly connected with a positioning cylinder, the inner cavity of the positioning cylinder is slidably connected with a movable block, the surface of the movable block is fixedly connected with two first mounting blocks, the two first mounting blocks are arranged opposite to each other, the inner walls of the two first mounting blocks are rotatably connected with a first connecting strip via a rotating shaft, one end of the two first connecting strips are rotatably connected with a positioning block via a rotating shaft, the inner wall of the positioning block is rotatably connected with a second connecting strip via a rotating shaft, the surface of the positioning cylinder is fixedly connected with two second mounting blocks used in conjunction with the second connecting strip, the second connecting strip is rotatably connected to the second mounting block via a rotating shaft, the top of the movable block is fixedly connected with a pull-out rod, the top of the pull-out rod is fixedly connected to the bottom of the connecting plate, the surface of the positioning cylinder is provided with a sliding hole used in conjunction with the first mounting block, the surface of the positioning block is fixedly connected with a supporting block, the surface of the supporting block is fixedly connected with a pressure sensor, and the pressure sensor is electrically connected to a controller.

[0014] Preferably, the surfaces of the two supporting blocks are fixedly connected with anti-skid pads, the anti-skid pads are made of silicone material, and the pressure sensor penetrates to the outside of the anti-skid pads.

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

[0016] The cam is an angular channel that is fixedly connected to the top of the support plate, and the cam is connected with the ball to form a circle, and the circle has a round shank to contact the top of the support plate.

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

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can automatically cut the longitudinal splines of the packaging bag by setting a longitudinal spline cutting unit. Combined with the pressing force of the pressing plate and the pulling force of the electric clamp, the longitudinal tensile strength of the packaging bag can be automatically tested, thereby avoiding the tedious steps of manually cutting the splines and then clamping the splines for testing, thereby improving the test efficiency.

[0021] 2. The present invention sets a transverse stress test unit, expands the test area of ​​the packaging bag transversely through the relative outward expansion of two expansion blocks, and monitors the pressure transmitted by the packaging bag when being expanded through a pressure sensor, thereby realizing the test of the transverse stress of the packaging bag.

[0022] 3. The present invention provides a positioning unit to squeeze and position the packaging bag mounted on the surface of the transverse stress testing unit, so that the packaging bag in this area forms a cylindrical shape, which is convenient for testing the transverse stress of the packaging bag, thereby improving the testing efficiency of the transverse stress. By using the longitudinal spline cutting unit, the transverse stress testing unit and the positioning unit in coordination, the tedious steps of manually cutting the spline and then clamping the spline for testing are avoided, and the transverse and longitudinal tensile strength tests of the packaging bag are carried out simultaneously, thereby improving the testing efficiency of the tensile strength of the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0025] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

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

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

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

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

[0030] Figure 8 A schematic diagram of the shape of the special-shaped electric guide rail of the present invention;

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

[0032] In the figure: 1, base; 11, controller; 12, lifting assembly; 13, connecting plate; 14, tension measuring piece; 2, testing mechanism; 21, longitudinal spline cutting unit; 2101, guide rod; 2102, support plate; 2103, L-shaped rod; 2104, pressing plate; 2105, placement slot; 2106, special-shaped electric guide rail; 2107, fixing block; 2108, connecting rod; 2109, blade; 2110, cutting slot; 2111, electric clamp; 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 Connecting strip; 2206, positioning block; 2207, second connecting strip; 2208, second mounting block; 2209, pull-out rod; 2210, sliding hole; 2211, supporting block; 2212, pressure sensor; 2213, anti-skid 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, splint; 2308, positioning frame; 2309, telescopic tube; 2310, first spring; 2311, guide groove; 2312, guide block; 2313, guide rod; 2314, second spring; 2315, movable groove; 2316, round rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1-Figure 9The present invention provides a technical solution: a packaging bag tensile strength testing device, comprising a base 1, a controller 11 is fixedly connected to one side of the base 1, the controller 11 has a display screen, and the tested strength value is displayed in time, a lifting component 12 is fixedly connected to the top of the base 1, the lifting component 12 includes a connecting plate 13, the connecting plate 13 is arranged on the top of the base 1, the lifting component 12 also includes a driving device, a guide rail and a protection frame, the driving device uses a motor and a reducer to provide smooth and accurate speed control, the guide rail can ensure the stable movement of the connecting plate 13 in the vertical direction, the protection frame can protect the driving device and the guide rail in its inner cavity, and extend the service life of the driving device and the guide rail, the connecting plate 13 is vertically lifted by the driving device, and a tensile measuring piece 14 is fixedly connected to the bottom of the connecting plate 13, the tensile measuring piece 14 mainly includes a sensor, which can convert the deformation and force value of the packaging bag sample during the stretching process into an electrical signal for subsequent data processing and analysis, and a testing mechanism 2 is arranged on one side of the lifting component 12;

[0035] The testing mechanism 2 includes a longitudinal spline cutting unit 21 . The longitudinal spline cutting unit 21 is disposed on the top of the base 1 . The longitudinal spline cutting unit 21 is used to cut the longitudinal splines of the packaging bag.

[0036] As a further limitation of the test mechanism 2 of the present invention, please refer to Figure 1-Figure 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, 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 pressing plate 2104 is arranged on one side of the L-shaped rod 2103, a placement groove 2105 is opened on the surface of the pressing plate 2104, a special-shaped electric guide rail 2106 is fixedly connected to the inner cavity of the placement groove 2105, a fixed block 2107 used in conjunction with the special-shaped 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, and the connecting rod 2108 is close to the fixing block 2107. Two blades 2109 are fixedly connected to one side of the support plate 2102, and a cutting groove 2110 used in conjunction with the two blades 2109 is opened on the surface of the support plate 2102. An electric clamp 2111 is fixedly connected to the bottom of the tension measuring piece 14, and the special-shaped electric guide rail 2106 and the electric clamp 2111 are both electrically connected to the controller 11; by setting up the longitudinal spline cutting unit 21, the longitudinal spline of the packaging bag can be automatically cut, and with the pressing force of the pressing plate 2104 and the pulling force of the electric clamp 2111, the longitudinal tensile strength of the packaging bag can be automatically tested, thereby avoiding the tedious steps of manually cutting the spline and then clamping the spline for testing, thereby improving the testing efficiency of the tensile strength of the packaging bag.

[0037] The inner wall of the L-shaped rod 2103 is threadedly connected to 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, and the other end of the threaded rod 2112 passes through the outer side of the L-shaped rod 2103 and is fixedly connected to a knob 2113; by arranging the threaded rod 2112 and the knob 2113, after completing the sleeve of the packaging bag, the user drives the threaded rod 2112 to rotate by turning the knob 2113, so that the threaded rod 2112 itself is displaced on the inner wall of the L-shaped rod 2103, thereby driving the pressure plate 2104 to approach the surface of the support plate 2102, thereby pressing the packaging bag.

[0038] Two telescopic rods 2114 are fixedly connected to the inner wall of the L-shaped rod 2103, and 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 rotationally limited to prevent the rotation of the threaded rod 2112 from driving the pressure plate 2104 to rotate, and through the telescopicity of the telescopic rods 2114, the guide distance of the pressure plate 2104 can be extended and contracted, thereby improving the stability of the pressure plate 2104 when moving.

[0039] The specific implementation of this embodiment is as follows: when testing the tensile strength of the packaging bag, first, the bag opening of the packaging bag is set upward from the bottom of the support plate 2102, the support plate 2102 is positioned by two guide rods 2101, and then the packaging bag is pulled upward to move the bag opening of the packaging bag to a specified position, so that the rightmost side of the packaging bag is in close contact with the right side of the support plate 2102, and the excess width of the packaging bag is all placed on the left side of the support plate 2102. The right hand side and left hand side of the user facing the support plate 2102 are respectively After the packaging bag is set on the left and right sides, the user turns the knob 2113 to drive the threaded rod 2112 to rotate. The rotation of the threaded rod 2112 causes it to move on the inner wall of the L-shaped rod 2103, so that the pressing plate 2104 moves to the surface of the support plate 2102, squeezes the packaging bag on the surface of the support plate 2102, and realizes partial positioning of the packaging bag. The controller 11 controls the lifting assembly 12 to lower the connecting plate 13 to the specified position, that is, the clamping part of the electric clamp 2111 is slightly embedded in the packaging bag. The two clamping jaws of the electric clamping jaw 2111 are respectively located at the front and rear sides of the front half of the packaging bag opening, and then the electric clamping jaw 2111 is started by the controller 11 to clamp the upper end of the front half of the packaging bag, and then the special-shaped electric guide rail 2106 is started by the controller 11. The starting end of the special-shaped electric guide rail 2106 is higher than the position of the top of the packaging bag. When the special-shaped electric guide rail 2106 is started, the fixed block 2107 is guided by the special-shaped track and will approach the surface of the support plate 2102 for a distance. At this time, the fixed 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, and the cutting tips of the two blades 2109 move to the top of the packaging bag. The fixed block 2107 continues to move downward in the special-shaped electric guide rail 2106, driving the two blades 2109 along the opposite side of the cutting groove 2110 to cut the front half of the packaging bag that has been positioned and tightened, until the blades 2109 contact the inner bottom of the cutting groove 2110, at which time the cutting of the longitudinal spline of the packaging bag is completed.

[0040] Example 2: Please refer to Figure 1-Figure 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 technology. The testing mechanism 2 includes a transverse stress testing unit 22, which is arranged 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 spline cutting unit 21.

[0041] As a further limitation of the testing mechanism 2 of the present invention, the lateral stress testing unit 22 includes a receiving groove 2201 opened on the surface of the supporting plate 2102, the inner bottom of the receiving groove 2201 is fixedly connected with a positioning cylinder 2202, the inner cavity of the positioning cylinder 2202 is slidably connected with a movable block 2203, the surface of the movable block 2203 is fixedly connected with two first mounting blocks 2204, 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 with a first connecting strip 2205 through a rotating shaft, one end of the two first connecting strips 2205 are rotatably connected with a positioning block 2206 through a rotating shaft, the inner wall of the positioning block 2206 is rotatably connected with a second connecting strip 2207 through a rotating shaft, and the surface of the positioning cylinder 2202 is fixedly connected with two second mounting blocks 220 used in conjunction with the second connecting strip 2207 8. The second connecting strip 2207 is rotatably connected to the second mounting block 2208 via a rotating shaft, a pull-out rod 2209 is fixedly connected to the top of the movable block 2203, the top of the pull-out rod 2209 is fixedly connected to the bottom of the connecting plate 13, a sliding hole 2210 for use with the first mounting block 2204 is provided on the surface of the positioning cylinder 2202, a supporting 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 supporting block 2211, and the pressure sensor 2212 is electrically connected to the controller 11; by setting up a lateral stress test unit 22, the test area of ​​the packaging bag is laterally expanded through the relative outward expansion of the two supporting blocks 2211, and the pressure value transmitted by the packaging bag when being stretched is monitored through the pressure sensor 2212, thereby realizing the test of the lateral stress of the packaging bag.

[0042] The surfaces of the two supporting blocks 2211 are fixedly connected with anti-skid pads 2213, and the anti-skid pads 2213 are made of silicone material. The pressure sensor 2212 penetrates the outside of the anti-skid pads 2213; by providing the anti-skid pads 2213, the friction between the supporting blocks 2211 and the packaging bag can be increased, so that the lateral expansion of the packaging bag can be achieved more stably.

[0043] Several positioning buckles 2214 are fixedly connected to both sides of the support plate 2102, and 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 sleeved on the surface of the support plate 2102, the supporting block 2211 of the transverse stress testing unit 22 is simultaneously wrapped into the inner cavity of the packaging bag, and when the top end of the packaging bag moves to the positioning buckle 2214, the user manually pulls the positioning buckle 2214 to deform the positioning buckle 2214, so as to embed the packaging bag into a gap between the positioning buckle 2214 and the support plate 2102, and then moves the top end of the packaging bag into the gap, cancels the pulling of the positioning buckle 2214, and the positioning buckle 2214 is reset 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 sample of the packaging bag. After the strips are cut, the user starts the lifting assembly 12 through the controller 11 to move the connecting plate 13 upward. The upward movement of the connecting plate 13 drives the tension measuring piece 14 and the electric clamp 2111 to move upward. The electric clamp 2111 pulls the longitudinal strips of the packaging bag clamped thereon, and cooperates with the tension measuring piece 14 to transmit the tension value generated by the pulling to the controller 11, so as to test the longitudinal tensile strength of the packaging bag. At the same time, the upward movement of the connecting plate 13 drives the pull rod 2209 to move upward, and the upward movement of the pull rod 2209 drives the movable block 2203 to move upward in the inner cavity of the positioning cylinder 2202. The movable block 2203 drives the positioning unit 23 during the upward movement, and the two positioning units 23 are used to adjust the lateral stress. The two sides of the packaging bag sleeved on the surface of the test unit 22 are pressed tightly, so that the packaging bag sleeved on the surface of the lateral 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 can determine 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 first mounting block 2204 is driven to move upward in the inner cavity of the sliding hole 2210 by the upward movement of the movable block 2203. The upward movement of the first mounting block 2204 drives the first connecting strip 2205 rotatably connected thereto to rotate. At this time, the positioning block 2206, the supporting block 2211, the second connecting strip 2207 and the second The joint action of the mounting block 2208 and the upward movement of the movable block 2203 gradually reduce the angle between the first connecting strip 2205 and the second connecting strip 2207, so that the connection point between the first connecting strip 2205 and the second connecting strip 2207, namely the positioning block 2206, gradually moves away from the positioning cylinder 2202, thereby pushing the two supporting blocks 2211 away from the positioning cylinder 2202, thereby achieving lateral supporting and squeezing of the packaging bag mounted on the surface thereof. During the supporting and squeezing process, the packaging bag squeezes the pressure sensor 2212, thereby achieving the test of the lateral stress of the packaging bag, thereby achieving the simultaneous testing of the longitudinal stress and the lateral stress of the packaging bag, thereby improving the test efficiency of the tensile strength of the packaging bag.

[0045] Example 3: Please refer to Figure 1 and Figure 4-Figure 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 technology. The testing mechanism 2 also includes a positioning unit 23. The number of the positioning units 23 is two. 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 spline cutting unit 21. The positioning unit 23 is used to perform interval positioning on the packaging bag.

[0046] As a further limitation of the test 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 arranged with an inclined surface, an extrusion rod 2303 is fixedly connected to the surface of the movable block 2203, one end of the extrusion rod 2303 is arranged with an inclined surface used in conjunction with the inclined surface of the contact rod 2302, two symmetrically arranged inclined grooves 2304 are provided on the top of the sliding block 2301, the inner cavities of the two inclined grooves 2304 are both slidably connected to the positioning rod 2305, the top of the positioning rod 2305 is fixedly connected to the connecting block 2306, the surface of the support plate 2102 is fixedly connected to the positioning frame 2308, and the positioning The inner wall of the frame 2308 is fixedly connected with a telescopic tube 2309, and the number of the telescopic tubes 2309 is two, and the two telescopic tubes 2309 are arranged opposite to each other. The telescopic ends of the two telescopic tubes 2309 are fixedly connected with a clamp 2307, and the bottom of the connecting block 2306 is fixedly connected to the top of the clamp 2307. The surface of the telescopic tube 2309 is slidably sleeved with a first spring 2310, and the two ends of the first spring 2310 are respectively fixedly connected to the clamp 2307 and the opposite sides of the positioning frame 2308; by setting the positioning unit 23, the packaging bag sleeved on the surface of the lateral stress testing unit 22 can be squeezed and positioned, so that the packaging bag in this section forms a cylindrical shape, which is convenient for testing the lateral stress of the packaging bag, thereby improving the testing efficiency of the lateral stress.

[0047] A guide groove 2311 is provided at the top of the support plate 2102, and a guide block 2312 is slidably connected to the inner cavity of the guide groove 2311, and the top of the guide block 2312 is fixedly connected to the bottom of the sliding block 2301, and a guide rod 2313 is fixedly connected to the inner side of the guide groove 2311, and the inner wall of the guide block 2312 is slidably connected to the surface of the guide rod 2313, and a second spring 2314 is fixedly connected to the inner side of the guide groove 2311, and one end of the second spring 2314 is fixedly connected to one side of the guide block 2312, and the second spring 2314 is slidably sleeved on the surface of the guide rod 2313; by setting the guide groove 2311, the guide block 2312, the guide rod 2313 and the second spring 2314, the guiding of the moving trajectory of the sliding block 2301 is achieved, the stability of the sliding block 2301 during movement is increased, and the automatic resetting of the sliding block 2301 can be achieved through the reaction force of the second spring 2314.

[0048] A movable groove 2315 is provided on one side of the support plate 2102, and the movable groove 2315 is connected to both the guide groove 2311 and the accommodating 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. By setting the movable groove 2315 and the round rod 2316 for use in coordination, the extrusion force of the lower end of the contact rod 2302 can be transmitted to the guide block 2312 through the round rod 2316, thereby achieving the extrusion of the sliding block 2301, and 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 lateral stress test begins, as the movable block 2203 moves upward, the extrusion rod 2303 moves upward. The upward movement of the extrusion rod 2303 squeezes the surface of the contact rod 2302. The extrusion rod 2303 gradually moves away from the inclined surface of the contact rod 2302, causing the contact rod 2302 to produce a lateral displacement. The lateral movement of the contact rod 2302 laterally squeezes the sliding block 2301, causing the sliding block 2301 to move to the side away from the lateral stress testing 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, thereby increasing the stability of the sliding block 2301 during movement. The movement of the sliding block 2301 drives the two inclined grooves 2304 at the top thereof 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. When the packaging bag is not positioned, the two The positioning rods 2305 are respectively located in the inner cavity at one end of the two inclined grooves 2304 that are away from each other. When the sliding block 2301 is pushed, the two positioning rods 2305 are guided by the inclined grooves 2304 to approach each other along the direction of the two inclined grooves 2304, so that the two connecting blocks 2306 are close to each other. The close proximity of the two connecting blocks 2306 makes the two clamps 2307 close to each other, so that the clamps 2307 are tightly attached to the surface of the support plate 2102 to position the packaging bag. The clamps 2307 are elastically adjusted to a moving distance through the telescopic tube 2309 and the first spring 2310. The first spring 2310 can help reset the extended displacement of the telescopic tube 209. Through the joint action of the two groups of positioning units 23, the packaging bag in the test area of ​​the lateral stress test unit 22 is self-cylindrical, providing a stable packaging bag test area for the lateral stress test and improving the test efficiency of the packaging bag's tensile strength.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention 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) being fixedly connected to one side of the base (1), a lifting assembly (12) being fixedly connected to the top of the base (1), the lifting assembly (12) comprising a connecting plate (13), the connecting plate (13) being arranged on the top of the base (1), and a tensile force measuring member (14) being 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) comprises a longitudinal spline cutting unit (21), wherein the longitudinal spline cutting unit (21) is arranged on the top of the base (1), and the longitudinal spline cutting unit (21) is used to cut the longitudinal spline of the packaging bag; The testing mechanism (2) further comprises a transverse stress testing unit (22), wherein the transverse stress testing unit (22) is arranged at the bottom of the connecting plate (13), and the transverse stress testing unit (22) is used to test the transverse stress of the packaging bag, and the transverse stress testing unit (22) is used in conjunction with the longitudinal spline cutting unit (21); The testing mechanism (2) further comprises a positioning unit (23), wherein the number of the positioning units (23) is two, and 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 spline cutting unit (21), and the positioning unit (23) is used to perform interval positioning on the packaging bag.

2. A packaging bag tensile strength testing device according to claim 1, characterized in that: The longitudinal spline cutting unit (21) comprises two guide rods (2101) fixedly connected to the surface of the lifting assembly (12), one end of the two guide rods (2101) being fixedly connected to a support plate (2102), the connecting plate (13) being slidably connected to the surfaces of the two guide rods (2101), the top of the base (1) being fixedly connected to an L-shaped rod (2103), one side of the L-shaped rod (2103) being provided with a pressing plate (2104), the surface of the pressing plate (2104) being provided with a placement groove (2105), the inner cavity of the placement groove (2105) being fixedly connected to a special-shaped electric guide rail (2106), the placement groove (21 05) is slidably connected to the inner cavity of the tension measuring piece (14) with a fixed block (2107) used in conjunction with the special-shaped electric guide rail (2106), one side of the fixed block (2107) is fixedly connected to a connecting rod (2108), and the side of the connecting rod (2108) close to the support plate (2102) is fixedly connected to two blades (2109), and the surface of the support plate (2102) is provided with a cutting groove (2110) used in conjunction with the two blades (2109), and the bottom of the tension measuring piece (14) is fixedly connected to an electric clamp (2111), and the special-shaped electric guide rail (2106) and the electric clamp (2111) are both electrically connected to the controller (11).

3. A packaging bag tensile strength testing device according to claim 2, characterized in that: The inner wall of the L-shaped rod (2103) is threadedly connected to 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, and the other end of the threaded rod (2112) passes through the outer side of the L-shaped rod (2103) and is fixedly connected to a knob (2113).

4. A packaging bag tensile strength testing device according to claim 2, characterized in that: Two telescopic rods (2114) are fixedly connected to the inner wall of the L-shaped rod (2103), and the telescopic ends of the two telescopic rods (2114) are fixedly connected to one side of the pressing plate (2104).

5. The packaging bag tensile strength testing device according to claim 2, characterized in that: The lateral stress testing unit (22) comprises a receiving groove (2201) provided on the surface of the supporting plate (2102), the inner bottom of the receiving groove (2201) is fixedly connected with a positioning cylinder (2202), the inner cavity of the positioning cylinder (2202) is slidably connected with a movable block (2203), the surface of the movable block (2203) is fixedly connected with two first mounting blocks (2204), 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 with a first connecting strip (2205) via a rotating shaft, one end of the two first connecting strips (2205) are rotatably connected with a positioning block (2206) via a rotating shaft, the inner wall of the positioning block (2206) is rotatably connected with a second connecting strip (2207) via a rotating shaft, and the positioning block (2206) is rotatably connected with a second connecting strip (2207) via a rotating shaft. The surface of the positioning tube (2202) is fixedly connected with two second mounting blocks (2208) used in conjunction with the second connecting strip (2207); the second connecting strip (2207) is rotatably connected to the second mounting block (2208) via a rotating shaft; the top of the movable block (2203) is fixedly connected with a pull-out rod (2209); the top of the pull-out rod (2209) is fixedly connected to the bottom of the connecting plate (13); the surface of the positioning tube (2202) is provided with a sliding hole (2210) used in conjunction with the first mounting block (2204); the surface of the positioning block (2206) is fixedly connected with a supporting block (2211); the surface of the supporting block (2211) is fixedly connected with a pressure sensor (2212); the pressure sensor (2212) is electrically connected to the controller (11).

6. A packaging bag tensile strength testing device according to claim 5, characterized in that: The surfaces of the two supporting blocks (2211) are both fixedly connected with anti-skid pads (2213), the anti-skid pads (2213) are made of silicone material, and the pressure sensor (2212) penetrates to the outside of the anti-skid pads (2213).

7. A packaging bag tensile strength testing device according to claim 2, characterized in that: A plurality of positioning buckles (2214) are fixedly connected to both sides of the support plate (2102), and the positioning buckles (2214) are made of elastic metal material.

8. The packaging bag tensile strength testing device according to claim 5, characterized in that: The positioning unit (23) comprises a sliding block (2301) slidably connected to the top of the support plate (2102), one side of the sliding block (2301) is fixedly connected to a contact rod (2302), one end of the contact rod (2302) is provided with an inclined surface, the surface of the movable block (2203) is fixedly connected to an extrusion rod (2303), one end of the extrusion rod (2303) is provided with an inclined surface used in conjunction with the inclined surface of the contact rod (2302), the top of the sliding block (2301) is provided with two symmetrically arranged inclined grooves (2304), the inner cavities of the two inclined grooves (2304) are both slidably connected to positioning rods (2305), the top of the positioning rod (2305) is fixedly connected to a connecting rod (2305) Block (2306), the surface of the support plate (2102) is fixedly connected with a positioning frame (2308), the inner wall of the positioning frame (2308) is fixedly connected with a telescopic tube (2309), the number of the telescopic tubes (2309) is two, the two telescopic tubes (2309) are arranged opposite to each other, the telescopic ends of the two telescopic tubes (2309) are fixedly connected with a clamping plate (2307), the bottom of the connecting block (2306) is fixedly connected to the top of the clamping plate (2307), the surface sliding sleeve of the telescopic tube (2309) is provided with a first spring (2310), and the two ends of the first spring (2310) are respectively fixedly connected to the opposite sides of the clamping plate (2307) and the positioning frame (2308).

9. The packaging bag tensile strength testing device according to claim 5, characterized in that: A guide groove (2311) is provided at the top of the support plate (2102), and a guide block (2312) is slidably connected to the inner cavity of the guide groove (2311), and the top of the guide block (2312) is fixedly connected to the bottom of the sliding block (2301), and a guide rod (2313) is fixedly connected to the inner side of the guide groove (2311), and the inner wall of the guide block (2312) is slidably connected to the surface of the guide rod (2313), and a second spring (2314) is fixedly connected to the inner side of the guide groove (2311), and one end of the second spring (2314) is fixedly connected to one side of the guide block (2312), and the second spring (2314) is slidably sleeved on the surface of the guide rod (2313).

10. A packaging bag tensile strength testing device according to claim 9, characterized in that: A movable groove (2315) is provided on one side of the support plate (2102), and the movable groove (2315) is connected to both 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).

Images