A detection method for plastic packaging bag production

Abstract

The application discloses a kind of detection methods for plastic packaging bag production, it is related to plastic packaging bag production technical field, specifically includes the following steps: step one, plastic packaging bag is placed on detection table, make upper clamping plate and its transverse plate move downwards, upper clamping plate first contact with packaging bag, preliminary positioning is carried out;Step two, after pressing plate contact, adjusting plate contact packaging bag and push it to move to both sides, realize stretching and unfolding and flattening by ball auxiliary;Step three, upper clamping plate continues to move downwards, extension plate contact and be limited with fixed plate, determine the position of pressing plate, then open first cylinder and drive moving plate to move to one side, so that the control assembly on moving plate drives the stretching test of the plastic packaging bag to be measured.The detection method for plastic packaging bag production, by adjusting plate to the stretching and unfolding and flattening of plastic packaging bag, can ensure that packaging bag is in flat state during detection process, to more accurately reflect its real physical performance.

Description

Technical Field

[0001] This invention relates to the field of plastic packaging bag production technology, specifically to a testing method for plastic packaging bag production. Background Technology

[0002] In the production process of plastic packaging bags, quality inspection is a crucial step in ensuring product quality and meeting customer needs. Currently, the main inspection method used in plastic packaging bag production is the traditional manual inspection method, which involves a comprehensive inspection of each produced bag, including appearance, size, physical properties, and other aspects. However, this traditional inspection method has many shortcomings:

[0003] First, traditional testing methods are time-consuming and inefficient. Because each package needs to be thoroughly inspected, testing personnel need to spend a lot of time and energy, which leads to extended production cycles and increased costs. At the same time, manual testing is also subject to the risk of human error, which affects the accuracy and reliability of the testing.

[0004] Secondly, during the testing process, the clamping and positioning of the packaging bags often relies on manual operation, which not only increases the difficulty of operation, but may also cause damage to the packaging bags during the clamping process, affecting their integrity and service life. In particular, for plastic packaging bags of different sizes and types, traditional testing methods are unable to provide stable and reliable clamping points, making the testing process more complex and difficult. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a testing method for the production of plastic packaging bags, which solves the technical problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides a testing method for the production of plastic packaging bags, specifically comprising the following steps:

[0007] Step 1, Positioning and Initial Contact: Place the plastic packaging bag on the testing table. Drive the screw to rotate through the drive motor, causing the upper clamping plate and its horizontal plate to move downwards. The upper clamping plate first contacts the packaging bag for initial positioning.

[0008] Step 2, stretching and unfolding: After the pressure plate makes contact, the adjusting plate contacts the packaging bag and pushes it to both sides, and the ball bearings assist in stretching, unfolding and flattening it.

[0009] Step 3, clamping and positioning: The upper clamping plate continues to move down, the extension plate contacts the fixed plate and is limited, and the position of the pressure plate is determined. Then, the lower clamping plate cooperates with the upper clamping plate to clamp the end of the packaging bag, in preparation for the tensile test. Then, the first cylinder is turned on to drive the moving plate to one side, so that the control component on the moving plate drives the plastic packaging bag to be tested to perform a tensile test.

[0010] The bottom of the base is fixedly connected with a detection table, both sides of the detection table are respectively provided with a fixed plate and a movable plate, and the inner side ends of the fixed plate and the movable plate are both provided with a control assembly;

[0011] The control assembly comprises a lower clamping plate and an upper clamping plate, the lower clamping plate is fixedly installed on the fixed plate, the upper clamping plate is slidingly installed on the fixed plate, the inner side ends of the lower clamping plate and the upper clamping plate are both fixedly connected with a horizontal plate, fixed columns are fixedly connected on both sides of the upper horizontal plate, a pressing rod is slidingly connected on the fixed column, the top of all the pressing rods is fixedly connected with a first connecting plate, a limiting block slidingly installed in the fixed column is fixedly connected to the lower end of the pressing rod, a fourth damping spring is arranged on the bottom of the limiting block and sleeved on the pressing rod, and a second air cylinder is fixedly installed on the bottom of both sides of the first connecting plate and on the horizontal plate.

[0012] As a further optimization of the technical solution, a first clamping groove and a second clamping groove are arranged on the surface of the fixed column, an elastic plate is arranged on the top of the limiting block, a clamping block corresponding to the specifications of the first clamping groove and the second clamping groove is arranged on the top of the elastic plate, a fixed frame is fixedly installed on the outer wall of the fixed column on one side of the second clamping groove, a horizontal rod is slidingly connected on the fixed frame, a pushing block is fixedly connected to one end of the horizontal rod close to the second clamping groove, the other end of the horizontal rod penetrates through the fixed frame and is fixedly connected with a second connecting plate, a fifth damping spring is sleeved on the outer wall of the horizontal rod, and a third air cylinder is fixedly installed on the outer side end of the second connecting plate and on the upper clamping plate.

[0013] As a further optimization of the technical solution, a lead screw is rotatably connected on the fixed plate, a driving motor is arranged on the top of the lead screw, third sliding rods are arranged on both sides of the lead screw, the upper clamping plate is threadedly connected with the lead screw and slidingly installed on the third sliding rods, horizontal grooves are arranged on both sides of the surface of the fixed plate, and inclined grooves are arranged at both ends of the horizontal grooves.

[0014] As a further optimization of the technical solution, fixed rods are fixedly connected on both sides of the lower horizontal plate, stretching plates are slidingly connected on the fixed rods, and tension springs are arranged between the stretching plates and the horizontal plate and sleeved on the fixed rods.

[0015] As a further optimization of the technical solution, vertical rods are slidingly connected on the upper horizontal plate, extending plates and pressing plates are respectively fixedly connected to the upper and lower ends of the vertical rods, the end of the extending plate is located directly above the top of the fixed plate, a first damping spring is arranged between the pressing plate and the horizontal plate and sleeved on the vertical rod, a limiting plate is fixedly connected to the vertical rod, and the limiting plate is located above the horizontal plate.

[0016] As a further optimization of the technical solution, a rectangular groove is arranged on the inner side end of the upper horizontal plate, a second sliding rod is fixedly connected in the rectangular groove, a rectangular block is slidingly connected on the second sliding rod, a second damping spring is sleeved on the second sliding rod and arranged on the outer side end of the rectangular block, a connecting rod is rotatably connected to the outer side end of the rectangular block, and a sleeve rod is rotatably connected to the other end of the connecting rod.

[0017] As a further preferred embodiment of the present technical solution, a sliding groove is formed in the sleeve rod, positioning rods are fixedly connected to the inner wall of the sliding groove, a sliding plate is slidably connected to the positioning rods, third damping springs are arranged on the bottom of the sliding plate and sleeved on the positioning rods, a sliding rod is fixedly connected to the sliding plate, the sliding rod slidably penetrates through the sleeve rod and is fixedly connected to an adjusting plate and a guide rod at both ends, the adjusting plate corresponds to the position of the stretching plate, and the bottom of the adjusting plate is provided with a plurality of rolling balls, and the end of the guide rod is slidably installed in the horizontal groove and the inclined groove.

[0018] As a further preferred embodiment of the present technical solution, first sliding rods are fixedly connected to both ends of the top of the base, and a moving plate is slidably installed on the first sliding rods, and a first air cylinder is fixedly installed on the right side of the moving plate.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] The single position of the plastic packaging bag can be quickly detected by clamping and positioning the single position of the plastic packaging bag with the pressing rod, without the need for comprehensive detection of the entire packaging bag, thereby greatly shortening the detection time and significantly improving the detection efficiency; the bottom of the pressing rod can accurately clamp and position the single position of the plastic packaging bag on the end plate of the lower clamping plate, ensuring the accuracy and reliability of the detection; after the pressing plate contacts the plastic packaging bag, the position of the pressing plate is determined by limiting the extension plate with the fixed plate, preventing the pressing plate from being pressed too much and damaging the packaging bag, and protecting the integrity of the packaging bag; the upper clamping plate and the cooperating lower clamping plate can clamp and position the end of the plastic packaging bag, providing a stable clamping point for subsequent stretching detection, making the stretching detection process more smooth and accurate.

[0021] The plastic packaging bag can be stretched and unfolded by the adjusting plate to ensure that the packaging bag is in a flat state during detection, thereby more accurately reflecting its true physical properties such as tensile strength and tear strength, improving the accuracy and reliability of the detection; the rolling balls arranged on the bottom of the adjusting plate can reduce friction with the packaging bag, reducing the risk of damage to the packaging bag during the flattening process, helping to protect the integrity of the packaging bag and prolong its service life; the arrangement of the rolling balls ensures that the packaging bag is evenly stressed during unfolding, avoiding deformation or damage of the packaging bag due to uneven stress, and ensuring the accuracy of the detection results; this process can adapt to plastic packaging bags of different sizes and types, and through the movement of the adjusting plate and the assistance of the rolling balls, effective flattening and positioning of various types of packaging bags can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the structure of the fixed plate and the control assembly in the present application;

[0024] Figure 3 Structure diagram of upper clamp plate, horizontal plate, vertical rod, pressing plate and extension plate in the application;

[0025] Figure 4 Structure diagram of horizontal plate, rectangular block, connecting rod and sleeve rod in the application;

[0026] Figure 5 Structure diagram of sleeve rod, sliding plate, sliding rod, adjusting plate and guide rod in the application;

[0027] Figure 6 Structure diagram of fixed column, pressing rod and first connecting plate in the application;

[0028] Figure 7 Structure diagram of Figure 6 Enlarged view of A in the application;

[0029] Figure 8 Structure diagram of Figure 7 Enlarged view of B in the application;

[0030] Figure 9 Structure diagram of fixed plate, lower clamp plate, stretching plate, horizontal groove and inclined groove in the application.

[0031] In the figure: 1, base; 2, detection table; 3, fixed plate; 4, moving plate; 11, first sliding rod; 12, first air cylinder; 31, lower clamp plate; 32, upper clamp plate; 33, horizontal plate; 34, vertical rod; 35, pressing plate; 36, first damping spring; 37, extension plate; 38, rectangular groove; 39, second sliding rod; 310, rectangular block; 311, second damping spring; 312, connecting rod; 313, sleeve rod; 314, sliding groove; 315, positioning rod; 316, sliding plate; 317, third damping spring; 318, sliding rod; 319, adjusting plate; 320, guide rod; 321, fixed column; 322, pressing rod; 323, first connecting plate; 324, second air cylinder; 325, limiting block; 326, fourth damping spring; 327, first clamping groove; 328, second clamping groove; 329, elastic plate; 330, clamping block; 331, fixed frame; 332, horizontal rod; 333, pushing block; 334, fifth damping spring; 335, second connecting plate; 336, third air cylinder; 337, screw rod; 338, third sliding rod; 339, driving motor; 340, horizontal groove; 341, inclined groove; 342, fixed rod; 343, stretching plate; 344, tension spring; 345, limiting plate. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] Embodiment one: combination Figures 1-9 As shown in the figure, the present application provides a technical solution: a detection method for plastic packaging bag production, specifically comprising the following steps:

[0034] Step one, positioning and initial contact: place the plastic packaging bag on the detection table 2, drive the lead screw 337 to rotate by the driving motor 339, and make the upper clamping plate 32 and its horizontal plate 33 move downward. The upper clamping plate 32 first contacts the packaging bag for initial positioning.

[0035] Step two, stretching and unfolding: after the pressing plate 35 contacts, adjust the plate 319 to contact the packaging bag and push it to move to both sides, and realize stretching and unfolding and flattening by the aid of the ball bearing;

[0036] Step three, clamping and positioning: the upper clamping plate 32 continues to move downward, the extension plate 37 contacts the fixed plate 3 and is limited in position, and the position of the pressing plate 35 is determined. Then, the lower clamping plate 31 cooperates with the upper clamping plate 32 to clamp the end of the packaging bag, preparing for stretching detection. Then, open the first air cylinder 12 to drive the moving plate 4 to move to one side, so that the control assembly on the moving plate 4 drives the plastic packaging bag to be tested to perform stretching test;

[0037] The control assembly is equipped with a high-precision force sensor that can measure the force applied to the sample during stretching in real time. When the plastic packaging bag sample is stretched, the force sensor captures the change and converts it into an electrical signal for transmission and processing. The data acquisition system inside the control assembly receives the electrical signal from the force sensor and converts it into a readable data format. These data typically include peak force, average force, and force trends over time. The collected force data is stored in the internal memory of the testing machine or transmitted to a computer for further processing and analysis. During testing, the data can be displayed in real time on the display screen of the testing machine for the operator to monitor and record. The control assembly is also equipped with a displacement sensor to measure the displacement change of the sample during stretching. The displacement sensor can accurately capture the elongation or deformation of the sample during stretching. The data measured by the displacement sensor is also received, converted, and stored by the data acquisition system. These data can include peak displacement, average displacement, rate, and displacement trends over time. When recording force and displacement data, synchronization between the two is required to accurately analyze the mechanical behavior of the sample during stretching. Therefore, the testing machine needs to be calibrated before testing to ensure the accuracy and consistency of the force and displacement sensors. The control assembly is equipped with dedicated data processing software to process and analyze the collected force and displacement data. These software can plot the data into graphs to more intuitively understand the mechanical behavior of the sample during stretching. By observing the force and displacement curves, the mechanical properties of the sample during stretching can be understood, such as elastic modulus, yield strength, breaking strength, and breaking elongation.

[0038] In the application, the top of the base 1 is fixedly connected with a detection table 2, the detection table 2 is provided with a fixed plate 3 and a moving plate 4 on both sides respectively, and the inner side ends of the fixed plate 3 and the moving plate 4 are provided with control assemblies, the top of the base 1 is fixedly connected with first sliding rods 11 at both ends, the moving plate 4 can be slidably installed on the first sliding rods 11, and the right side of the moving plate 4 is provided with a first air cylinder 12 fixedly installed on the base 1, when the first air cylinder 12 is started, it drives the moving plate 4 to move to one side, so that the control assembly on the moving plate 4 can drive the plastic packaging bag to be tested to be stretched for testing, during the testing, the change of the stretching curve is observed, and key parameters such as elastic modulus, yield strength, breaking strength and the like are recorded, after the testing is completed, the testing data is collected and arranged, the data is statistically analyzed, the average stretching strength, standard deviation and the like of the packaging bag are obtained, according to the testing result, whether the strength and durability of the packaging bag meet the preset requirements are evaluated, if the testing result does not meet the requirements, the reasons are analyzed and corresponding measures are taken for improvement.

[0039] The control assembly comprises a lower clamping plate 31 and an upper clamping plate 32, which are used for clamping and fixing the end of the plastic packaging bag, facilitating subsequent detection. The lower clamping plate 31 is fixedly installed on the fixed plate 3, and the upper clamping plate 32 is slidingly installed on the fixed plate 3. The inner side ends of the lower clamping plate 31 and the upper clamping plate 32 are fixedly connected with a horizontal plate 33. Two fixed columns 321 are fixedly connected on the two sides of the upper horizontal plate 33. A pressing rod 322 is slidingly connected on the fixed column 321. The top of all the pressing rods 322 is fixedly connected with a first connecting plate 323. The lower end of the pressing rod 322 is fixedly connected with a limiting block 325 slidingly installed in the fixed column 321. The bottom of the limiting block 325 is provided with a fourth damping spring 326 sleeved on the pressing rod 322. The bottom of the first connecting plate 323 is provided with a second air cylinder 324 fixedly installed on the horizontal plate 33. The second air cylinder 324 can drive the first connecting plate 323 to move downward, so that the first connecting plate 323 drives the pressing rod 322 and the limiting block 325 to move downward and compresses the fourth damping spring 326. When the bottom end of the pressing rod 322 moves to a position below the bottom end of the upper clamping plate 32, the bottom of the pressing rod 322 clamps and positions the plastic packaging bag at a single position on the horizontal plate 33 at the end of the lower clamping plate 31 as the upper clamping plate 32, the horizontal plate 33, the fixed column 321 and the pressing rod 322 move downward. Thus, it is convenient to detect the plastic packaging bag at a single position subsequently. After clamping and positioning, the position can be quickly detected without the need for comprehensive detection of the entire packaging bag, thereby shortening the detection time and improving the detection efficiency.

[0040] Two clamping grooves, i.e., a first clamping groove 327 and a second clamping groove 328, are formed on the surface of the fixed column 321 at upper and lower positions. An elastic plate 329 is arranged on the top of the limiting block 325. The elastic plate 329 can be an elastic metal plate. A clamping block 330 corresponding in specification to the first clamping groove 327 and the second clamping groove 328 is installed on the top of the elastic plate 329. Due to the elastic effect of the elastic plate 329, the clamping block 330 can be driven to move outward, so that the clamping block 330 can smoothly enter the first clamping groove 327 or the second clamping groove 328. The clamping block 330 can be slidingly installed in the first clamping groove 327 or clampingly installed in the third sliding rod 338, so as to fix the position of the pressing rod 322. When the pressing rod 322 drives the elastic plate 329 and the clamping block 330 to move downward, the clamping block 330 can be actively slid out of the first clamping groove 327 and then moved into the second clamping groove 328 to fix the position of the pressing rod 322 again.

[0041] On one side of the second clamping groove 328, a fixed frame 331 is arranged, which is fixedly installed on the outer wall of the fixed column 321. A horizontal rod 332 is slidably connected to the fixed frame 331. The end of the horizontal rod 332 close to the second clamping groove 328 is fixedly connected to a pushing block 333. The other end of the horizontal rod 332 penetrates through the fixed frame 331 and is fixedly connected to a second connecting plate 335. In order to increase the stability of the system, a fifth damping spring 334 is sleeved on the outer wall of the horizontal rod 332. The outer side of the second connecting plate 335 is provided with a third air cylinder 336 fixedly installed on the upper clamping plate 32. By opening the third air cylinder 336, the second connecting plate 335 can be moved to one side of the fixed column 321. The second connecting plate 335 drives the horizontal rod 332 and the pushing block 333 to move to one side of the second clamping groove 328, and compresses the fifth damping spring 334, so that the pushing block 333 pushes the clamping block 330 located in the second clamping groove 328 to move inward, thereby releasing the restriction of the second clamping groove 328 on the clamping block 330. At this time, the pressing rod 322 can move upward to realize the adjustment of its position.

[0042] On the fixed plate 3, a lead screw 337 is rotatably connected. The top of the lead screw 337 is provided with a driving motor 339 for driving the rotation of the lead screw 337. The two sides of the lead screw 337 are respectively provided with a third sliding rod 338. The upper clamping plate 32 is threadedly connected with the lead screw 337, so that the upper clamping plate 32 can be slidably installed on the third sliding rod 338. The surface of the fixed plate 3 is provided with horizontal grooves 340 on both sides. The two ends of the horizontal grooves 340 are provided with inclined grooves 341. These designs provide more flexibility and stability for the entire mechanical structure.

[0043] The two sides of the lower horizontal plate 33 are fixedly connected with fixed rods 342. The fixed rods 342 are slidably connected with stretching plates 343. Between the stretching plates 343 and the horizontal plate 33, tension springs 344 sleeved on the fixed rods 342 are arranged. Under the elastic force of the tension springs 344, the stretching plates 343 can be pulled to move inward on the fixed rods 342;

[0044] A vertical rod 34 is slidably connected to the upper horizontal plate 33. An extension plate 37 and a pressure plate 35 are fixedly connected to the upper and lower ends of the vertical rod 34, respectively. The end of the extension plate 37 is located directly above the top of the fixed plate 3. A first damping spring 36 is sleeved on the vertical rod 34 between the pressure plate 35 and the horizontal plate 33. A limiting plate 345 is fixedly connected to the vertical rod 34 and is located above the horizontal plate 33. When the upper clamping plate 32 and the horizontal plate 33 located on the upper clamping plate 32 move downwards to the side of the lower clamping plate 31, the pressure plate 35 will preferentially contact the plastic packaging bag located on the testing table 2 and position the plastic packaging bag. After the pressure plate 35 contacts the plastic packaging bag, as... The upper clamping plate 32 continues to move downward, causing the extension plate 37 to contact the top of the fixed plate 3, thus limiting the extension plate 37. This determines the position of the pressure plate 35, preventing the extension plate 37, vertical rod 34, and pressure plate 35 from moving downward with the upper clamping plate 32. This also determines the position of the pressure plate 35, allowing the upper clamping plate 32 to retract the pressure plate 35 to the bottom of the horizontal plate 33 and compress the first damping spring 36, so that the pressure plate 35 no longer contacts the plastic packaging bag. The upper clamping plate 32 and the cooperating lower clamping plate 31 can clamp and position the end of the plastic packaging bag, which facilitates the subsequent tensile testing of the plastic packaging bag.

[0045] A rectangular groove 38 is provided on the inner end of the upper horizontal plate 33. A second slide rod 39 is fixedly connected in the rectangular groove 38. A rectangular block 310 is slidably connected on the second slide rod 39. A second damping spring 311 is provided on the outer end of the rectangular block 310 and sleeved on the second slide rod 39. A connecting rod 312 is rotatably connected to the outer end of the rectangular block 310, and the two connecting rods 312 are rotatably connected in a staggered manner. A sleeve rod 313 is rotatably connected to the other end of the connecting rod 312.

[0046] The sliding groove 314 is arranged in the sleeve rod 313, the positioning rods 315 are fixedly connected to the inner wall of the sliding groove 314, the sliding plate 316 is slidably connected to the positioning rods 315, the third damping springs 317 are arranged on the bottom of the sliding plate 316 and sleeved on the positioning rods 315, the sliding rod 318 is fixedly connected to the sliding plate 316, the sliding rod 318 is slidably penetrated through the sleeve rod 313 and is fixedly connected with the adjusting plate 319 and the guide rod 320 at both ends, the adjusting plate 319 corresponds to the position of the stretching plate 343, a plurality of ball bearings are arranged on the bottom of the adjusting plate 319, and the end of the guide rod 320 is slidably arranged in the horizontal groove 340 and the inclined groove 341. When the upper clamping plate 32 drives the horizontal plate 33, the connecting rod 312, the sleeve rod 313 and the adjusting plate 319 to move downwards, the adjusting plate 319 contacts the plastic packaging bag on the stretching plate 343, and as the upper clamping plate 32, the horizontal plate 33, the connecting rod 312, the sleeve rod 313 and the adjusting plate 319 continue to move downwards, the sleeve rod 313 cooperates with the connecting rod 312 to drive the rectangular block 310 on the second sliding rod 39 to slide outward on the second sliding rod 39 and compress the second damping spring 311, and at the same time, the sleeve rod 313 cooperates with the adjusting plate 319 to drive the plastic packaging bag on the stretching plate 343 to move to both sides, and a plurality of ball bearings are arranged on the bottom of the adjusting plate 319, so that the adjusting plate 319 can stretch and flatten the plastic packaging bag. Through the arrangement of the ball bearings, the stress of the packaging bag during the unfolding process can be ensured to be uniform, and the deformation or damage of the packaging bag caused by uneven stress can be avoided. The flattened plastic packaging bag can more accurately reflect its true physical properties, such as tensile strength and tear strength, thereby improving the accuracy and reliability of detection. Through the arrangement of the ball bearings, the friction between the adjusting plate 319 and the packaging bag is reduced, the risk of damage of the packaging bag during the flattening process is reduced, and the integrity of the packaging bag is protected.

[0047] The working principle of the detection method for plastic packaging bag production is as follows: the plastic packaging bag to be detected is placed on the detection table 2, so that the two ends of the plastic packaging bag to be detected are placed on the stretching plate 343, the lead screw 337 is driven to rotate by the driving motor 339, and then the upper clamping plate 32 is driven to move downwards, when the upper clamping plate 32 and the horizontal plate 33 located on the upper clamping plate 32 move to the side of the lower clamping plate 31, the pressing plate 35 will first contact the plastic packaging bag on the detection table 2 and position the plastic packaging bag.

[0048] After the pressing plate 35 contacts the plastic packaging bag, the adjusting plate 319 contacts the plastic packaging bag on the stretching plate 343, and as the upper clamping plate 32, the horizontal plate 33, the connecting rod 312, the sleeve rod 313, and the adjusting plate 319 continue to move downward, the sleeve rod 313 cooperates with the connecting rod 312 to push the rectangular block 310 on the second sliding rod 39 to slide outward and compress the second damping spring 311, and at the same time, the sleeve rod 313 cooperates with the adjusting plate 319 to drive the plastic packaging bag on the stretching plate 343 to move to both sides, and a plurality of balls are arranged at the bottom of the adjusting plate 319, so that the adjusting plate 319 can stretch, unfold, and flatten the plastic packaging bag;

[0049] As the upper clamping plate 32 continues to move downward, the extension plate 37 contacts the top of the fixed plate 3, and the fixed plate 3 limits the extension plate 37, which determines the position of the pressing plate 35 and prevents the extension plate 37, the vertical rod 34, and the pressing plate 35 from continuing to move downward with the upper clamping plate 32. This determines the position of the pressing plate 35, so that when the upper clamping plate 32 moves downward, the pressing plate 35 can be retracted to the bottom position of the horizontal plate 33 and compress the first damping spring 36, so that the pressing plate 35 no longer contacts the plastic packaging bag. The upper clamping plate 32 cooperates with the lower clamping plate 31 to clamp and position the end of the plastic packaging bag, thereby facilitating subsequent stretching and testing of the plastic packaging bag.

[0050] Then the first air cylinder 12 drives the moving plate 4 to move to one side, so that the control assembly on the moving plate 4 drives the plastic packaging bag to be tested for stretching. During the test, the change of the stretching curve is observed, and key parameters such as elastic modulus, yield strength, and breaking strength are recorded. After the test is completed, the test data is collected and sorted, and statistical analysis is performed on the data to obtain the average tensile strength, standard deviation, and other indicators of the packaging bag. According to the test results, the strength and durability of the packaging bag are evaluated to determine whether they meet the predetermined requirements. If not, the reasons need to be analyzed and appropriate measures need to be taken to improve.

[0051] When detecting a single position of the plastic packaging bag, the second air cylinder 324 drives the first connecting plate 323 to move downward, so that the first connecting plate 323 drives the pressing rod 322, the limiting block 325, the elastic plate 329, and the clamping block 330 to move downward and compress the fourth damping spring 326. The clamping block 330 is actively slid out of the first clamping groove 327, and then the clamping block 330 moves into the second clamping groove 328 to fix the position of the pressing rod 322. When the bottom end of the pressing rod 322 moves to a position below the bottom end of the upper clamping plate 32, as the upper clamping plate 32, the horizontal plate 33, the fixed column 321, and the pressing rod 322 move downward, the bottom of the pressing rod 322 clamps and positions a single position of the plastic packaging bag on the horizontal plate 33 at the end of the lower clamping plate 31, thereby facilitating subsequent detection and processing of the single position of the plastic packaging bag.

[0052] By opening the third air cylinder 336, the second connecting plate 335 is driven to move to one side of the fixed column 321, the second connecting plate 335 drives the horizontal rod 332 and the pushing block 333 to move to one side of the second clamping groove 328, and the fifth damping spring 334 is compressed, so that the pushing block 333 pushes the clamping block 330 located in the second clamping groove 328 to move to the inside, thereby releasing the restriction of the second clamping groove 328 on the clamping block 330, at this time the pressing rod 322 can move upward.

[0053] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A testing method for plastic packaging bag production, characterized in that, Specifically, the following steps are included: Step 1, Positioning and Initial Contact: Place the plastic packaging bag on the detection platform (2) at the top of the base (1). Drive the screw (337) to rotate through the drive motor (339), so that the upper clamping plate (32) and its horizontal plate (33) move downward. The upper clamping plate (32) first contacts the packaging bag for initial positioning. Step 2, stretching and unfolding: After the pressure plate (35) contacts the packaging bag, the adjusting plate (319) contacts the packaging bag and pushes it to move to both sides, and the stretching and unfolding are achieved with the help of the ball bearings; Step 3, clamping and positioning: The upper clamping plate (32) continues to move down, the extension plate (37) contacts the fixed plate (3) and is limited, and the position of the pressure plate (35) is determined. Then, the lower clamping plate (31) and the upper clamping plate (32) cooperate to clamp the end of the packaging bag to prepare for the tensile test. Then, the first cylinder (12) is turned on to drive the moving plate (4) to move to one side, so that the control components on the moving plate (4) drive the plastic packaging bag to be tested to perform a tensile test. The base (1) is fixedly connected to the top of the test platform (2). The test platform (2) is provided with a fixed plate (3) and a movable plate (4) on both sides respectively, and the inner ends of the fixed plate (3) and the movable plate (4) are provided with control components. The control assembly includes a lower clamping plate (31) and an upper clamping plate (32). The lower clamping plate (31) is fixedly installed on the fixed plate (3), and the upper clamping plate (32) is slidably installed on the fixed plate (3). A horizontal plate (33) is fixedly connected to the inner end of both the lower clamping plate (31) and the upper clamping plate (32). A fixed column (321) is fixedly connected to both sides of the upper horizontal plate (33). A pressure rod (322) is slidably connected to the fixed column (321). A first connecting plate (323) is fixedly connected to the top of all the pressure rods (322). A limit block (325) is slidably installed in the fixed column (321) at the lower end of the pressure rod (322). A fourth damping spring (326) is sleeved on the pressure rod (322) at the bottom of the limit block (325). A second cylinder (324) is fixedly installed on the horizontal plate (33) on both sides of the bottom of the first connecting plate (323). A lead screw (337) is rotatably connected to the fixed plate (3). A drive motor (339) is provided on the top of the lead screw (337). A third slide rod (338) is provided on both sides of the lead screw (337). The upper clamping plate (32) is threadedly connected to the lead screw (337), and the upper clamping plate (32) is slidably installed on the third slide rod (338). A transverse groove (340) is provided on both sides of the surface of the fixed plate (3). An inclined groove (341) is provided at both ends of the transverse groove (340). A vertical rod (34) is slidably connected to the upper horizontal plate (33). An extension plate (37) and a pressure plate (35) are fixedly connected to the upper and lower ends of the vertical rod (34), respectively. The end of the extension plate (37) is located directly above the top of the fixed plate (3). A first damping spring (36) is provided between the pressure plate (35) and the horizontal plate (33) and sleeved on the vertical rod (34). A limit plate (345) is fixedly connected to the vertical rod (34) and the limit plate (345) is located above the horizontal plate (33). A rectangular groove (38) is provided on the inner end of the upper horizontal plate (33). A second slide rod (39) is fixedly connected in the rectangular groove (38). A rectangular block (310) is slidably connected on the second slide rod (39). A second damping spring (311) is sleeved on the second slide rod (39) at the outer end of the rectangular block (310). A connecting rod (312) is rotatably connected to the outer end of the rectangular block (310). A sleeve rod (313) is rotatably connected to the other end of the connecting rod (312). The sleeve rod (313) has a sliding groove (314) inside. The inner walls of the sliding groove (314) are fixedly connected to the positioning rod (315) on both sides. The positioning rod (315) is slidably connected to the sliding plate (316). The bottom sides of the sliding plate (316) are provided with a third damping spring (317) sleeved on the positioning rod (315). The sliding plate (316) is fixedly connected to the sliding rod (318). The two ends of the sliding rod (318) slide through the sleeve rod (313) and are respectively fixedly connected to the adjusting plate (319) and the guide rod (320). The positions of the adjusting plate (319) and the tension plate (343) correspond to each other. The bottom of the adjusting plate (319) is provided with several balls. The end of the guide rod (320) is slidably installed in the horizontal groove (340) and the inclined groove (341). The base (1) has a first slide rod (11) fixedly connected to both ends of the top, and the movable plate (4) is slidably mounted on the first slide rod (11). The right side of the movable plate (4) is provided with a first cylinder (12) fixedly mounted on the base (1).

2. The testing method for plastic packaging bag production according to claim 1, characterized in that: The fixed column (321) has a first slot (327) and a second slot (328) at the top and bottom positions. The limit block (325) has an elastic plate (329) at the top. The elastic plate (329) has a locking block (330) at the top, which corresponds to the specifications of the first slot (327) and the second slot (328). The second slot (328) has a fixed frame (331) fixedly installed on the outer wall of the fixed column (321) on one side. The fixed frame (331) has a horizontal bar (332) slidably connected to it. The horizontal bar (332) has a push block (333) fixedly connected to one end near the second slot (328). The other end of the horizontal bar (332) passes through the fixed frame (331) and is fixedly connected to a second connecting plate (335). The outer wall of the horizontal bar (332) is fitted with a fifth damping spring (334). The outer end of the second connecting plate (335) has a third cylinder (336) fixedly installed on the upper clamping plate (32).

3. The testing method for plastic packaging bag production according to claim 1, characterized in that: Fixed rods (342) are fixedly connected to both sides of the lower horizontal plate (33). A tension plate (343) is slidably connected to the fixed rod (342). A tension spring (344) is sleeved on the fixed rod (342) between the tension plate (343) and the horizontal plate (33).

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