A plastic packaging bag toughness strength testing device

Abstract

The present invention discloses a device for testing the toughness strength of plastic packaging bags, and relates to the technical field of testing the toughness strength of plastic packaging bags. The present invention comprises a bottom plate, a bracket is welded on the top of the bottom plate, a test hydraulic cylinder is fixedly installed on the top of the bracket, an upper pressure assembly is fixedly installed on the bottom of the telescopic end of the test hydraulic cylinder, and a lower test assembly is fixedly installed on the top of the bottom plate. The present invention places the plastic packaging bag on the top of the lower pressure plate, and two groups of upper pressure plates cooperate with the lower pressure plate to clamp the two ends of the plastic packaging bag to perform an overall toughness strength test, and the plastic packaging bag is sleeved on the test frame so that the test surface is located at the top to perform a single-sided toughness strength test, and then by adjusting the spacing between the two groups of upper pressure plates and the lower pressure plate, the toughness strength test of the single-sided coating part can be performed, and the test is comprehensive. The arc-shaped design of the test frame and the test slideway makes the test efficiency higher.

Description

Technical Field

[0001] The invention relates to the technical field of toughness strength detection of plastic packaging bags, and in particular to a toughness strength detection device for plastic packaging bags. Background Art

[0002] Plastic packaging bags are bags made of plastic (commonly used plastics include polypropylene, polyester, nylon, etc.) as the main raw material. They are essential items in people's daily lives and are often used to hold other items. After the production of plastic packaging bags is completed, the toughness and strength of the plastic bags need to be tested through a stretching device to ensure that the quality meets the requirements.

[0003] In the document (application number: CN202211208080.0), a plastic packaging bag toughness strength detector is disclosed, including a base plate, and also including: a panel fixedly arranged on both sides of the base plate, a mounting ring fixedly connected between the panels, and a mounting disk fixedly connected inside the mounting ring; a detection mechanism arranged on one side of the mounting disk, including a mounting roller rotatably arranged on the side of the mounting disk, a slide groove is provided on the side of the mounting roller, an arc column is arranged in the slide groove, the arc column is fixedly arranged in the slide groove of the mounting roller, a movable arm is slidably sleeved on the arc column, and support members are sleeved on the arc columns on both sides of the movable arm, one end of the movable arm is rotatably connected to the winding roller, the end of the movable arm on one side of the winding roller is fixedly connected to the positioning arm, and one end of the positioning arm is fixedly connected to the second electric clamping rod, and the winding roller is axially aligned. A driving assembly is arranged on the side of the movable arm on the side, the side wall of the mounting plate is fixedly connected to the air cylinder, the end of the air cylinder is fixedly connected to the air pump, a valve assembly is arranged on one end of the air cylinder on the air pump side, a movable assembly is arranged on one end of the air cylinder, a marking pen is arranged on one end of the movable assembly, the side of the mounting ring on the marking pen side is rotatably connected to the unloading roller, the side wall of the mounting ring on the one side of the unloading roller is fixedly connected to the first electric clamping rod, during the detection process, the driving assembly drives the unloading roller to intermittently rotate and unload the material through the winding roller, when the mounting roller rotates, the winding roller applies a pulling force to the plastic packaging bag, and the valve assembly drives the marking pen on the movable assembly to move, while detecting the plastic packaging bag, the plastic packaging bag with unqualified strength is marked; the driving mechanism arranged on one side of the mounting roller is used to drive the detection mechanism.

[0004] This patent and the prior art have the following technical problems in actual use:

[0005] The existing equipment directly clamps the two ends of the entire plastic packaging bag and then performs toughness strength testing. Through this clamping method, only the toughness strength of the entire plastic packaging bag can be tested, and single-side toughness strength testing cannot be performed, especially for the toughness strength test of the single-side coated part, and the test is not comprehensive enough. Summary of the invention

[0006] The purpose of the present invention is to solve the above problems and provide a device for testing the toughness strength of plastic packaging bags.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A plastic packaging bag toughness strength testing device comprises a bottom plate, a bracket is welded on the top of the bottom plate, a test hydraulic cylinder is fixedly installed on the top of the bracket, an upper pressure component is fixedly installed on the bottom of the telescopic end of the test hydraulic cylinder, and a lower test component is fixedly installed on the top of the bottom plate;

[0009] The upper pressure assembly includes a bidirectional positive and negative thread ball screw module fixedly mounted at the bottom of the telescopic end of the test hydraulic cylinder, the bottoms of the two groups of sliders on the bidirectional positive and negative thread ball screw module are fixedly mounted with connecting columns, and the bottom of the connecting column is fixedly mounted with an upper pressure plate;

[0010] The lower test assembly includes a test frame, a mounting guide column is fixedly installed on the right side of the bottom of the test frame, and the mounting guide column is fixedly installed on the bottom plate. The top of the test frame is designed to be arc-shaped, and a test slide groove is opened on the top of the test frame. Two groups of test slides are slidably connected inside the test slide groove, and friction damping is arranged between the test slide and the test slide groove. A lower pressure plate is hinged on the top of the test slide, and the lower pressure plate always remains horizontal. A supporting cylinder is fixedly installed on the top of the bottom plate, and a supporting support plate is fixedly installed on the top of the telescopic end of the supporting cylinder, and the supporting support plate is located on the left side of the bottom of the test frame.

[0011] Furthermore, an indicator scale is provided on the front of the bidirectional forward and reverse thread ball screw module, and an indicator needle is provided on the top of the upper slider of the bidirectional forward and reverse thread ball screw module.

[0012] Furthermore, an outer protective shell is fixedly installed on the outer side of the lower pressure plate, and a worm gear is fixedly installed on the outer side of the lower pressure plate. The worm gear is located in the outer protective shell, and the rotation center of the worm gear coincides with the hinge center of the lower pressure plate. A transmission shaft is rotatably installed inside the outer protective shell, a worm is fixedly installed on the top of the transmission shaft, and the worm is meshed with the worm gear. A bevel gear is fixedly installed on the bottom of the transmission shaft, and a bevel tooth groove is opened at the bottom of the front side of the test frame, and the bevel gear is meshed with the bevel tooth groove.

[0013] Furthermore, an outer surface of the outer protective shell is provided with an arc chamfer.

[0014] Furthermore, a nut is provided on the outer side of the outer protective shell, a friction screw is connected to the inner thread of the nut, and a friction groove is provided on the front side of the test frame.

[0015] Furthermore, an angle scale is provided on the front of the test stand, and the outer protective shell is made of transparent plastic.

[0016] Furthermore, a transmission wheel is rotatably installed in the middle of the test slide groove, and arc-shaped racks are fixedly installed on the opposite surfaces of the two groups of test sliders. The two groups of arc-shaped racks are respectively engaged with the two sides of the transmission wheel, and a rack through hole is opened inside the test slider, and the arc-shaped rack passes through the rack through hole.

[0017] Furthermore, a lower guide groove is provided on the top of the base plate, an upper guide groove is provided on the right side of the bottom of the test frame, the mounting guide column can be inserted into the lower guide groove and the upper guide groove, a threaded hole is provided at the bottom of the test frame, and a long bolt passes through the base plate and the mounting guide column and is threadedly connected in the threaded hole.

[0018] Furthermore, a clamping groove is provided on the lower surface of the upper pressing plate and the upper surface of the lower pressing plate.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention places the plastic packaging bag on the top of the lower pressing plate, and two sets of upper pressing plates cooperate with the lower pressing plate to clamp the two ends of the plastic packaging bag to perform an overall toughness strength test. The plastic packaging bag is sleeved on a test frame so that the test surface is located at the top to perform a single-sided toughness strength test. Then, by adjusting the spacing between the two sets of upper pressing plates and the lower pressing plate, the toughness strength test of the single-sided coating part can be performed, and the test is comprehensive.

[0021] The present invention drives the upper pressure plate to descend through the test hydraulic cylinder. The upper pressure plate first presses on the lower pressure plate to clamp the plastic packaging bag, and then continues to press downward. The pressure is greater than the friction damping between the test slider and the test slide groove. The lower pressure plate drives the test slider to slide downward along the test slide groove, and then the toughness strength of the plastic packaging bag can be tested. The clamping and test drive are both achieved by the test hydraulic cylinder, and the structure is compact.

[0022] The present invention adopts an arc-shaped design of the test frame and the test slide, so that the plastic packaging bag moves downward horizontally and vertically at the same time, and the test efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic diagram of the installation of the upper pressure assembly and the lower test assembly of the present invention;

[0025] Figure 3 The explosion of the upper pressure assembly of the present invention Figure 1 ;

[0026] Figure 4 The explosion of the upper pressure assembly of the present invention Figure 2 ;

[0027] Figure 5 The test assembly exploded under the present invention Figure 1 ;

[0028] Figure 6 The test assembly exploded under the present invention Figure 2 ;

[0029] Figure 7 It is a schematic diagram of the structure of the lower pressing plate of the present invention.

[0030] : 1. base plate; 11. lower guide groove; 2. bracket; 3. test hydraulic cylinder; 4. upper pressure assembly; 41. bidirectional positive and negative ball screw module; 42. connecting column; 43. upper pressure plate; 5. lower test assembly; 51. mounting guide column; 52. test frame; 521. test slide groove; 522. transmission wheel; 523. bevel tooth groove; 524. friction groove; 525. upper guide groove; 53. supporting cylinder; 54. supporting support plate; 55. test slide; 551. arc-shaped rack; 552. rack through hole; 56. lower pressure plate; 561. worm gear; 57. outer protective shell; 58. friction screw; 59. transmission shaft; 591. worm; 592. bevel gear. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Embodiment 1, as Figure 1-Figure 7 As shown, a plastic packaging bag toughness strength testing device comprises a bottom plate 1, a bracket 2 is welded on the top of the bottom plate 1, a test hydraulic cylinder 3 is fixedly installed on the top of the bracket 2, an upper pressure component 4 is fixedly installed at the bottom of the telescopic end of the test hydraulic cylinder 3, and a lower test component 5 is fixedly installed on the top of the bottom plate 1;

[0033] The upper pressure assembly 4 includes a bidirectional positive and negative thread ball screw module 41 fixedly mounted at the bottom of the telescopic end of the test hydraulic cylinder 3, and the bottoms of the two groups of sliders on the bidirectional positive and negative thread ball screw module 41 are fixedly mounted with connecting columns 42, and the bottom of the connecting column 42 is fixedly mounted with an upper pressure plate 43;

[0034] The lower test assembly 5 includes a test frame 52, and a mounting guide column 51 is fixedly installed on the right side of the bottom of the test frame 52, and the mounting guide column 51 is fixedly installed on the base plate 1. The top of the test frame 52 is designed to be arc-shaped, and a test slide groove 521 is opened on the top of the test frame 52. Two groups of test sliders 55 are slidably connected inside the test slide groove 521. Friction damping is arranged between the test slider 55 and the test slide groove 521. A lower pressure plate 56 is hinged on the top of the test slider 55, and the lower pressure plate 56 always remains horizontal. A supporting cylinder 53 is fixedly installed on the top of the base plate 1, and a supporting support plate 54 is fixedly installed on the top of the telescopic end of the supporting cylinder 53. The supporting support plate 54 is located on the left side of the bottom of the test frame 52.

[0035] Overall toughness strength test: Place the plastic packaging bag as a whole on two sets of lower pressure plates 56, and then control the test hydraulic cylinder 3 to run. The test hydraulic cylinder 3 drives the two-way positive and negative tooth ball screw module 41 to descend, and the two-way positive and negative tooth ball screw module 41 drives the upper pressure plate 43 to descend through the connecting column 42. It should be noted that through the setting of the connecting column 42, when the upper pressure plate 43 descends to the bottom, the two-way positive and negative tooth ball screw module 41 will not interfere with the test frame 52, and the test is stable. The upper pressure plate 43 is pressed on the plastic packaging bag, and cooperates with the lower pressure plate 56 to clamp the plastic packaging bag. At this time, since friction damping is set between the test slider 55 and the test slide groove 521, the upper pressure plate 43 will first Sufficient clamping force is applied, and then the upper pressing plate 43 pushes the lower pressing plate 56 to slide downward along the test slide 521. The two groups of lower pressing plates 56 move away from each other, giving tension to both ends of the plastic packaging bag. Since the test slide 521 is designed in an arc shape, the lower pressing plate 56 moves in an arc shape, and the lower pressing plate 56 is displaced in both the horizontal and vertical directions. When the middle of the plastic packaging bag is pressed on the top of the test frame 52, the test frame 52 limits the descent of the plastic packaging bag, and the two ends of the plastic packaging bag are bent and stretched downward. In a limited space, the two ends of the plastic packaging bag are quickly stretched, and the tension at both ends of the upper pressing plate 43 and the lower pressing plate 56, and the supporting force of the test frame 52, can be subjected to forces in different directions at one time, and the test effect is better.

[0036] Single-sided toughness strength test: Control the support cylinder 53 to operate, and the support cylinder 53 drives the support plate 54 to descend. At this time, the plastic packaging bag is sleeved on the test frame 52 from the left, and the test surface is located above the test frame 52. Then control the support cylinder 53 to operate, and the support cylinder 53 drives the support plate 54 to rise. The support plate 54 supports the left side of the bottom of the test frame 52, so that the test frame 52 remains stable during the test. At the same time, the support plate 54 clamps the non-test surface of the plastic packaging bag, which will not affect the stretching of the test surface. Then, as with the overall toughness strength test, the two ends of the single side of the plastic packaging bag are stretched. Since the top of the test frame 52 is designed in an arc shape and the bottom is designed in a straight line, the test surface of the plastic packaging bag is stretched, and the non-test surface is relaxed, which will not affect the stretching of the test surface.

[0037] Single-sided coating position toughness strength test: push the lower pressing plate 56, and the lower pressing plate 56 drives the test slider 55 to slide in the test slide 521 to adjust the distance between the two groups of lower pressing plates 56, so that the coating position can be placed between the two groups of lower pressing plates 56, and at the same time control the bidirectional positive and negative tooth ball screw module 41, synchronously change the distance between the two groups of upper pressing plates 43, so that the upper pressing plate 43 can correspond to the lower pressing plate 56, and then perform toughness strength test on the coating position according to the overall toughness strength test steps;

[0038] By adopting the equipment of the present invention, the toughness strength test of the plastic packaging bag can be carried out comprehensively, and the test effect is good.

[0039] Embodiment 2, based on the above embodiment, further includes that an indicator scale is provided on the front of the bidirectional positive and negative thread ball screw module 41, and an indicator needle is provided on the top of the slider on the bidirectional positive and negative thread ball screw module 41. Through this design, the distance between the two groups of upper pressure plates 43 can be intuitively observed.

[0040] Embodiment 3, based on the above embodiment, provides a structure for adjusting the level of the lower pressing plate 56;

[0041] like Figure 5-Figure 7 As shown, an outer protective shell 57 is fixedly installed on the outer side of the lower pressure plate 56, and a worm gear 561 is fixedly installed on the outer side of the lower pressure plate 56. The worm gear 561 is located in the outer protective shell 57, and the rotation center of the worm gear 561 coincides with the hinge center of the lower pressure plate 56. A transmission shaft 59 is rotatably installed inside the outer protective shell 57, and a worm 591 is fixedly installed on the top of the transmission shaft 59, and the worm 591 is meshed with the worm gear 561. A bevel gear 592 is fixedly installed on the bottom of the transmission shaft 59, and a bevel tooth groove 523 is opened at the lower front side of the test frame 52, and the bevel gear 592 is meshed with the bevel tooth groove 523.

[0042] Furthermore, the outer surface of the outer protective shell 57 is provided with an arc chamfer, and the configuration of the outer protective shell 57 prevents the bevel gear 592, the worm 591 and the worm wheel 561 from affecting the connection of the plastic packaging bag.

[0043] The test slider 55 slides downward along the test slide groove 521, and the test slider 55 drives the bevel gear 592 to move relative to the bevel tooth groove 523, and the bevel tooth groove 523 drives the bevel gear 592 to rotate, and the bevel gear 592 drives the transmission shaft 59 to rotate, and the transmission shaft 59 drives the worm 591 to rotate, and the worm 591 drives the worm wheel 561 to rotate, and the worm wheel 561 drives the lower pressure plate 56 to swing relative to the test slider 55. Because the bevel tooth groove 523 is located at the bottom, it is closer to the center of the arc at the top of the test frame 52 relative to the test slide groove 521. When the test slider 55 slides down a long distance, the bevel gear 592 moves a shorter distance relative to the bevel tooth groove 523. Therefore, the lower pressure plate 56 swings a smaller angle and just remains horizontal. Because the worm wheel 561 cannot drive the worm 591 to rotate, when the lower pressure plate 56 is subjected to the downward pressure of the upper pressure plate 43, the angle of the lower pressure plate 56 can remain stable.

[0044] Embodiment 4, based on the above embodiment, further includes that a nut is provided on the outer side of the outer protective shell 57 , a friction screw 58 is connected to the inner thread of the nut, and a friction groove 524 is opened on the front side of the test frame 52 .

[0045] Furthermore, an angle scale is provided on the front of the test frame 52, and the outer protective shell 57 is made of transparent plastic. Through this design, it is easy to observe the angle between the two groups of outer protective shells 57, and the spacing of the test sliders 55 can be determined, thereby determining whether the toughness strength of the plastic packaging is qualified.

[0046] Through the arrangement of this embodiment, there is no need to set friction damping between the test slider 55 and the test slide groove 521. When it is necessary to adjust the distance between the two groups of test sliders 55, the friction screw 58 is unscrewed from the friction groove 524. At this time, the test slider 55 can be easily slid, and the adjustment is convenient. After the adjustment is completed, the friction screw 58 is tightened to make it fit tightly with the friction groove 524. Only when there is sufficient clamping between the upper pressure plate 43 and the lower pressure plate 56, the test slider 55 will be pushed to slide downward along the test slide groove 521, and the adjustment is more convenient.

[0047] Embodiment 5, on the basis of the above embodiment, further includes: a transmission wheel 522 is rotatably installed in the middle of the test slide groove 521, arc-shaped racks 551 are fixedly installed on the opposite surfaces of the two groups of test sliders 55, the two groups of arc-shaped racks 551 are respectively engaged with the two sides of the transmission wheel 522, and a rack through hole 552 is opened inside the test slider 55, and the arc-shaped rack 551 passes through the rack through hole 552.

[0048] When the left test slider 55 is pushed to move, the left test slider 55 drives the arc-shaped rack 551 thereon to move, and the arc-shaped rack 551 drives the transmission wheel 522 to rotate. The transmission wheel 522 drives the arc-shaped rack 551 on the right test slider 55 to move in the opposite direction, and the arc-shaped rack 551 drives the right test slider 55 to move in the opposite direction. Therefore, the two groups of test sliders 55 will move in the opposite direction synchronously. The heights of the two groups of test sliders 55 are always on the same horizontal plane, and the pressure they are subjected to is the same. They are easy to adjust and have high adjustment accuracy.

[0049] Embodiment 6, based on the above embodiment, further includes: a lower guide groove 11 is opened on the top of the base plate 1, an upper guide groove 525 is opened on the right side of the bottom of the test frame 52, the installation guide column 51 can be inserted into the lower guide groove 11 and the upper guide groove 525, and a threaded hole is opened at the bottom of the test frame 52, and a long bolt passes through the base plate 1 and the installation guide column 51 and is threadedly connected in the threaded hole.

[0050] When installing the test frame 52, first insert the installation guide column 51 into the lower guide groove 11, then make the upper guide groove 525 at the bottom of the test frame 52 correspond to the installation guide column 51, and insert the installation guide column 51 into the upper guide groove 525, and then use a long bolt to penetrate the bottom plate 1 and threadedly connect the installation guide column 51 in the threaded hole to complete the quick positioning and installation of the test frame 52, which is easy to install.

[0051] Embodiment 7, based on the above embodiments, further includes that the lower surface of the upper pressing plate 43 and the upper surface of the lower pressing plate 56 are both provided with clamping grooves to increase the clamping friction force.

[0052] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic packaging bag toughness strength testing device, comprising a bottom plate (1), characterized in that: A bracket (2) is welded to the top of the base plate (1), a test hydraulic cylinder (3) is fixedly mounted on the top of the bracket (2), an upper pressure assembly (4) is fixedly mounted at the bottom of the telescopic end of the test hydraulic cylinder (3), and a lower test assembly (5) is fixedly mounted on the top of the base plate (1); The upper pressure assembly (4) comprises a bidirectional positive and negative thread ball screw module (41) fixedly mounted on the bottom of the telescopic end of the test hydraulic cylinder (3), the bottoms of two groups of sliders on the bidirectional positive and negative thread ball screw module (41) are fixedly mounted with connecting columns (42), and the bottoms of the connecting columns (42) are fixedly mounted with an upper pressure plate (43); The lower test assembly (5) comprises a test frame (52), a mounting guide column (51) is fixedly mounted on the right side of the bottom of the test frame (52), the mounting guide column (51) is fixedly mounted on the bottom plate (1), the top of the test frame (52) is designed to be arc-shaped, a test slide groove (521) is provided on the top of the test frame (52), two groups of test sliders (55) are slidably connected inside the test slide groove (521), friction damping is provided between the test sliders (55) and the test slide groove (521), a lower pressure plate (56) is hinged on the top of the test slider (55), and the lower pressure plate (56) is always kept horizontal, a support cylinder (53) is fixedly mounted on the top of the bottom plate (1), a support support plate (54) is fixedly mounted on the top of the telescopic end of the support cylinder (53), and the support support plate (54) is located on the left side of the bottom of the test frame (52).

2. A plastic packaging bag toughness strength testing device according to claim 1, characterized in that: An indication scale is provided on the front of the bidirectional forward and reverse thread ball screw module (41), and an indication needle is provided on the top of the upper slider of the bidirectional forward and reverse thread ball screw module (41).

3. A plastic packaging bag toughness strength testing device according to claim 1, characterized in that: An outer protective shell (57) is fixedly mounted on the outer side of the lower pressure plate (56), a worm gear (561) is fixedly mounted on the outer side of the lower pressure plate (56), the worm gear (561) is located in the outer protective shell (57), the rotation center of the worm gear (561) coincides with the hinge center of the lower pressure plate (56), a transmission shaft (59) is rotatably mounted inside the outer protective shell (57), a worm (591) is fixedly mounted on the top of the transmission shaft (59), the worm (591) is meshed with the worm gear (561), a bevel gear (592) is fixedly mounted on the bottom of the transmission shaft (59), a bevel tooth groove (523) is opened at the lower side of the front of the test frame (52), and the bevel gear (592) is meshed with the bevel tooth groove (523).

4. A plastic packaging bag toughness strength testing device according to claim 3, characterized in that: The outer surface of the outer protective shell (57) is provided with a circular arc chamfer.

5. A plastic packaging bag toughness strength testing device according to claim 4, characterized in that: A nut is arranged on the outside of the outer protective shell (57), a friction screw (58) is threadedly connected to the inside of the nut, and a friction groove (524) is provided on the front of the test stand (52).

6. A plastic packaging bag toughness strength testing device according to claim 5, characterized in that: The front of the test stand (52) is provided with an angle scale, and the outer protective shell (57) is made of transparent plastic.

7. A plastic packaging bag toughness strength testing device according to claim 6, characterized in that: A transmission wheel (522) is rotatably mounted in the middle of the test slide groove (521), and arc-shaped racks (551) are fixedly mounted on opposite surfaces of the two groups of test sliders (55), and the two groups of arc-shaped racks (551) are respectively meshed on both sides of the transmission wheel (522), and a rack through hole (552) is opened inside the test slider (55), and the arc-shaped rack (551) passes through the rack through hole (552).

8. A plastic packaging bag toughness strength testing device according to claim 1, characterized in that: A lower guide groove (11) is provided at the top of the bottom plate (1), an upper guide groove (525) is provided at the right side of the bottom of the test frame (52), the mounting guide column (51) can be inserted into the lower guide groove (11) and the upper guide groove (525), a threaded hole is provided at the bottom of the test frame (52), and a long bolt passes through the bottom plate (1) and the mounting guide column (51) and is threadedly connected in the threaded hole.

9. A plastic packaging bag toughness strength testing device according to claim 1, characterized in that: The lower surface of the upper pressing plate (43) and the upper surface of the lower pressing plate (56) are both provided with clamping grooves.

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