Detection method for plastic packaging bag production

Abstract

The invention discloses a detection method for plastic packaging bag production, and relates to the technical field of plastic packaging bag production, and the detection method specifically comprises the following steps: 1, placing a plastic packaging bag on a detection table, enabling an upper clamping plate and a transverse plate to move downwards, enabling the upper clamping plate to firstly contact with the packaging bag, and carrying out preliminary positioning; 2, after the pressing plate makes contact, an adjusting plate makes contact with the packaging bag and pushes the packaging bag to move towards the two sides, and stretching, unfolding and flattening are achieved through assistance of balls; 3, the upper clamping plate continues to move downwards, the extension plate makes contact with the fixed plate and is limited, the position of the pressing plate is determined, then a first air cylinder is started to drive a movable plate to move towards one side, and a control assembly on the movable plate drives the to-be-tested plastic packaging bag to be subjected to a stretching test. According to the detection method for plastic packaging bag production, the plastic packaging bag is stretched, unfolded and flattened through the adjusting plate, it can be ensured that the packaging bag is in a flat state in the detection process, and therefore the real physical performance of the packaging bag can be reflected more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of plastic packaging bag production, in particular to a detection method for plastic packaging bag production. Background Art

[0002] In the production process of plastic packaging bags, quality inspection is an important link to ensure product quality and meet customer needs. At present, the inspection method for plastic packaging bag production mainly adopts the traditional manual inspection method, that is, a comprehensive inspection of each packaging bag produced, including appearance, size, physical properties and other aspects. However, this traditional inspection method has many defects:

[0003] First, traditional testing methods are time-consuming and inefficient. Since each packaging bag needs to be fully inspected, testers need to spend a lot of time and energy, which leads to longer production cycles and increased costs. At the same time, manual testing also has the risk of human error, which affects the accuracy and reliability of the test.

[0004] Secondly, during the inspection process, the clamping and positioning of packaging bags often rely 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. Especially for plastic packaging bags of different sizes and types, traditional inspection methods are difficult to provide stable and reliable clamping points, making the inspection process more complicated and difficult. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a detection method for the production of plastic packaging bags, which solves the technical problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A detection 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, and use the drive motor to drive the screw to rotate, so that the upper clamping plate and its cross plate move downward. The upper clamping plate first contacts the packaging bag for initial positioning;

[0008] Step 2: Stretch and unfold: After the pressing plate contacts, the adjusting plate contacts the packaging bag and pushes it to move to both sides, and the ball is used to assist in stretching, unfolding and flattening;

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

[0010] The top of the base is fixedly connected with a testing platform, and a fixed plate and a movable plate are respectively arranged on both sides of the testing platform, and control components are arranged on the inner ends of the fixed plate and the movable plate;

[0011] The control component includes a lower clamping plate and an upper clamping plate, the lower clamping plate is fixedly mounted on the fixed plate, the upper clamping plate is slidably mounted on the fixed plate, the inner ends of the lower clamping plate and the upper clamping plate are fixedly connected to a cross plate, fixed columns are fixedly connected to both sides of the upper cross plate, a pressure rod is slidably connected to the fixed column, the tops of all the pressure rods are fixedly connected to a first connecting plate, the lower ends of the pressure rods are fixedly connected to a limit block slidably mounted in the fixed column, a fourth damping spring sleeved on the pressure rod is arranged at the bottom of the limit block, and second cylinders fixedly mounted on the cross plate are arranged on both sides of the bottom of the first connecting plate.

[0012] As a further optimization of the present technical solution, a first card slot and a second card slot are provided at the upper and lower positions on the surface of the fixed column, an elastic plate is provided on the top of the limit block, and a card block corresponding to the specifications of the first card slot and the second card slot is provided on the top of the elastic plate, a fixed frame fixedly installed on the outer wall of the fixed column is provided on one side of the second card slot, a cross bar is slidably connected to the fixed frame, a push block is fixedly connected to one end of the cross bar close to the second card slot, the other end of the cross bar passes through the fixed frame and is fixedly connected to the second connecting plate, a fifth damping spring is sleeved on the outer wall of the cross bar, and a third cylinder fixedly installed on the upper clamping plate is provided on the outer end of the second connecting plate.

[0013] As a further preferred embodiment of the present technical solution, a screw rod is rotatably connected to the fixed plate, a driving motor is arranged on the top of the screw rod, a third sliding rod is arranged on both sides of the screw rod, the upper clamping plate is threadedly connected to the screw rod, and the upper clamping plate is slidably installed on the third sliding rod, and transverse grooves are opened on both sides of the surface of the fixed plate, and inclined grooves are arranged at both ends of the transverse grooves.

[0014] As a further preferred embodiment of the present technical solution, fixed rods are fixedly connected to both sides of the lower horizontal plate, a stretching plate is slidably connected to the fixed rods, and a tension spring sleeved on the fixed rods is provided between the stretching plate and the horizontal plate.

[0015] As a further preferred embodiment of the present technical solution, a vertical rod is slidably connected to the upper horizontal plate, and an extension plate and a pressure plate are fixedly connected to the upper and lower ends of the vertical rod respectively, and the end of the extension plate is located directly above the top of the fixed plate, and a first damping spring is arranged between the pressure plate and the horizontal plate and is sleeved on the vertical rod, and a limiting plate is fixedly connected to the vertical rod, and the limiting plate is located above the horizontal plate.

[0016] As a further preferred embodiment of the present technical solution, a rectangular groove is provided at the inner end of the upper horizontal plate, a second sliding rod is fixedly connected in the rectangular groove, a rectangular block is slidably connected to the second sliding rod, a second damping spring sleeved on the second sliding rod is provided at the outer end of the rectangular block, a connecting rod is rotatably connected to the outer end of the rectangular block, and a sleeve rod is rotatably connected to the other end of the connecting rod.

[0017] As a further optimization of the present technical solution, a slide groove is provided inside the sleeve rod, positioning rods are fixedly connected on both sides of the inner wall of the slide groove, a slide plate is slidably connected to the positioning rod, third damping springs sleeved on the positioning rods are provided on both sides of the bottom of the slide plate, a slide rod is fixedly connected to the slide plate, both ends of the slide rod slide through the sleeve rod and are respectively fixedly connected with an adjustment plate and a guide rod, the positions of the adjustment plate and the stretching plate correspond to each other, a number of ball bearings are provided at the bottom of the adjustment plate, and the ends of the guide rods are 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 the movable plate is slidably mounted on the first sliding rods, and a first cylinder fixedly mounted on the base is provided on the right side of the movable plate.

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

[0020] By clamping and positioning a single position of the plastic packaging bag through the pressure rod, the position can be quickly tested without the need to conduct a comprehensive test on the entire packaging bag, thereby greatly shortening the test time and significantly improving the test efficiency; the bottom of the pressure rod can accurately clamp and position a single position of the plastic packaging bag located on the cross plate at the end of the lower clamping plate, ensuring the accuracy and reliability of the test; after the pressure plate contacts the plastic packaging bag, the position of the pressure plate is determined by the limiting treatment of the extension plate by the fixed plate, preventing the pressure plate from excessively pressing down on the packaging bag and causing damage to the packaging bag, thereby protecting the integrity of the packaging bag; the upper clamping plate and the matching lower clamping plate can clamp and position the end of the plastic packaging bag, providing a stable clamping point for subsequent tensile testing, making the tensile testing process smoother and more accurate.

[0021] By stretching, unfolding and flattening the plastic packaging bag through the adjustment plate, it can be ensured that the packaging bag is in a flat state during the detection process, thereby more accurately reflecting its true physical properties, such as tensile strength, tear strength, etc., and improving the accuracy and reliability of the detection; the ball set at the bottom of the adjustment plate can reduce the friction between the adjustment plate and the packaging bag, reduce the risk of damage to the packaging bag during the flattening process, help protect the integrity of the packaging bag and extend its service life; the setting of the ball ensures that the packaging bag is evenly stressed during the unfolding process, avoids deformation or damage of the packaging bag due to uneven force, and ensures the accuracy of the test results; this process can adapt to plastic packaging bags of different sizes and types, and through the movement of the adjustment plate and the assistance of the ball, effective flattening and positioning of various types of packaging bags can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 It is a structural schematic diagram of the fixing plate and the control assembly in the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the upper clamping plate, the horizontal plate, the vertical rod, the pressing plate, and the extension plate in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the horizontal plate, rectangular block, connecting rod and sleeve rod in the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the sleeve rod, the slide plate, the sliding rod, the adjustment plate and the guide rod in the present invention;

[0027] Figure 6 It is a schematic structural diagram of the fixed column, the compression rod and the first connecting plate in the present invention;

[0028] Figure 7 for Figure 6 The enlarged view of point A in the middle;

[0029] Figure 8 for Figure 7 The enlarged view of point B in the middle;

[0030] Fig. 9 It is a schematic diagram of the structure of the fixed plate, the lower clamping plate, the stretching plate, the transverse groove and the inclined groove in the present invention.

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

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. 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.

[0033] Embodiment 1: Combination Figure 1-Figure 9 As shown, the present invention provides a technical solution: a detection method for the production of plastic packaging bags, which specifically includes the following steps:

[0034] Step 1: Positioning and initial contact: Place the plastic packaging bag on the testing table 2, and drive the screw 337 to rotate through the driving motor 339, so that the upper clamping plate 32 and its cross plate 33 move downward, and the upper clamping plate 32 first contacts the packaging bag for initial positioning;

[0035] Step 2: stretching and unfolding: after the pressing plate 35 contacts, the adjusting plate 319 contacts the packaging bag and pushes it to move to both sides, and the ball is used to assist in stretching, unfolding and flattening;

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

[0037] The control component is equipped with a high-precision force sensor, which can measure the force applied to the sample during the stretching process in real time. When the plastic packaging bag sample is stretched, the force sensor will capture this change and convert it into an electrical signal for transmission and processing; the data acquisition system inside the control component will receive the electrical signal from the force sensor and convert it into a readable data format; these data usually include the peak value, average value and change trend of the force over time; the collected force data will be stored in the internal memory of the testing machine, or transmitted to the computer through the data interface for further processing and analysis. During the test, these data can be displayed in real time on the display screen of the testing machine for the operator to monitor and record; the control component is also equipped with a displacement sensor for measuring the displacement change of the sample during the stretching process. The displacement sensor can accurately capture the sample's The elongation or deformation during the stretching process, the data measured by the displacement sensor will also be received, converted and stored by the data acquisition system. These data may include the peak value, average value, rate and change trend over time of the displacement. When recording the force and displacement data, it is necessary to ensure the synchronization between the two so as to accurately analyze the mechanical behavior of the sample during the stretching process. Therefore, the testing machine needs to be calibrated before the test to ensure the accuracy and consistency of the force and displacement sensors; the control component is equipped with a dedicated data processing software for processing and analyzing the collected force and displacement data. These software can draw the data into a curve graph so as to more intuitively understand the mechanical behavior of the sample during the stretching process. By observing the force and displacement curve graph, the mechanical properties of the sample during the stretching process, such as elastic modulus, yield strength, breaking strength and elongation at break, can be understood;

[0038] In the present invention, a testing platform 2 is fixedly connected to the top of the base 1, and a fixed plate 3 and a movable plate 4 are respectively provided on both sides of the testing platform 2, and the inner ends of the fixed plate 3 and the movable plate 4 are provided with control components. The two ends of the top of the base 1 are fixedly connected to a first slide bar 11, and the movable plate 4 can be slidably installed on the first slide bar 11. The right side of the movable plate 4 is provided with a first cylinder 12 fixedly installed on the base 1. When the first cylinder 12 is turned on, it will drive the movable plate 4 to move to one side, so that the control component on the movable plate 4 can drive the plastic packaging bag to be tested to perform a tensile test. During the test, the changes in the tensile curve are 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 the data is statistically analyzed to obtain the average tensile strength, standard deviation and other indicators of the packaging bag. According to the test results, it is evaluated whether the strength and durability of the packaging bag meet the preset requirements. If the test results do not meet the requirements, it is necessary to analyze the reasons and take corresponding measures to improve them.

[0039] The control component includes a lower clamping plate 31 and an upper clamping plate 32, and the lower clamping plate 31 and the upper clamping plate 32 are used to clamp and fix the end of the plastic packaging bag to facilitate subsequent inspection. The lower clamping plate 31 is fixedly installed on the fixing plate 3, and the upper clamping plate 32 is slidably installed on the fixing plate 3. The inner ends of the lower clamping plate 31 and the upper clamping plate 32 are fixedly connected to the cross plate 33, and the two sides of the upper cross plate 33 are fixedly connected to the fixing columns 321, and the fixing columns 321 are slidably connected to the pressure rod 322. The tops of all the pressure rods 322 are fixedly connected to the first connecting plate 323, and the lower ends of the pressure rods 322 are fixedly connected to the limiting blocks 325 slidably installed in the fixing columns 321. The bottom of the limiting block 325 is provided with a fourth damping spring 326 sleeved on the pressure rod 322. The bottom of the first connecting plate 323 is provided on both sides The second cylinder 324 is fixedly mounted on the cross plate 33, and the second cylinder 324 can drive the first connecting plate 323 to move downward, so that the first connecting plate 323 drives the pressure rod 322 and the limit block 325 to move downward and compress the fourth damping spring 326. When the bottom end of the pressure rod 322 moves to a position below the bottom end of the upper clamping plate 32, as the upper clamping plate 32, the cross plate 33, the fixed column 321, and the pressure rod 322 move downward, the bottom of the pressure rod 322 clamps and positions a single position of the plastic packaging bag on the cross plate 33 at the end of the lower clamping plate 31. In this way, it is convenient to perform subsequent detection and processing of a single position of the plastic packaging bag. After clamping and positioning, the position can be quickly detected without the need to perform a comprehensive detection of the entire packaging bag, thereby shortening the detection time and improving the detection efficiency.

[0040] On the surface of the fixed column 321, two slots are respectively provided at the upper and lower positions, namely the first slot 327 and the second slot 328. On the top of the limit block 325, an elastic plate 329 is provided. The elastic plate 329 can be an elastic metal plate. On the top of the elastic plate 329, a block 330 corresponding to the specifications of the first slot 327 and the second slot 328 is installed. Due to the elastic effect of the elastic plate 329, the block 330 can be driven to move outward, so that the block 330 can smoothly enter the first slot 327 or the second slot 328. The block 330 can be slidably installed in the first slot 327, and can also be engaged and installed in the third slide bar 338, so as to fix the position of the pressure rod 322. When the pressure rod 322 drives the elastic plate 329 and the block 330 to move downward, the block 330 can actively slide out of the first slot 327, and then move into the second slot 328, so as to fix the position of the pressure rod 322 again.

[0041] On one side of the second slot 328, a fixing frame 331 is provided. The fixing frame 331 is fixedly mounted on the outer wall of the fixing column 321. A cross bar 332 is slidably connected to the fixing frame 331. One end of the cross bar 332 close to the second slot 328 is fixedly connected to a push block 333. The other end of the cross bar 332 passes through the fixing frame 331 and is fixedly connected to the 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 cross bar 332. The outer end of the second connecting plate 335 is provided with a The third cylinder 336 is fixedly mounted on the upper clamping plate 32. By opening the third cylinder 336, the second connecting plate 335 can be driven to move toward one side of the fixed column 321. The second connecting plate 335 drives the cross bar 332 and the push block 333 to move toward one side of the second slot 328, and compresses the fifth damping spring 334, so that the push block 333 pushes the block 330 located in the second slot 328 to move inward, thereby releasing the restriction of the second slot 328 on the block 330. At this time, the pressure rod 322 can move upward to adjust its position.

[0042] On the fixed plate 3, a screw rod 337 is rotatably connected, a driving motor 339 is arranged on the top of the screw rod 337, and a third slide bar 338 is arranged on both sides of the screw rod 337, and the upper clamping plate 32 is connected to the screw rod 337 by threads, so that the upper clamping plate 32 can be slidably installed on the third slide bar 338, and transverse grooves 340 are opened on both sides of the surface of the fixed plate 3, and inclined grooves 341 are arranged at both ends of the transverse groove 340, which provide more flexibility and stability for the entire mechanical structure;

[0043] The two sides of the horizontal plate 33 at the bottom are fixedly connected to the fixed rods 342, and the fixed rods 342 are slidably connected to the stretching plates 343. Between the stretching plates 343 and the horizontal plate 33, there are tension springs 344 sleeved on the fixed rods 342. 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] The upper horizontal plate 33 is slidably connected to the vertical rod 34, and the upper and lower ends of the vertical rod 34 are fixedly connected to the extension plate 37 and the pressure plate 35 respectively. The end of the extension plate 37 is located just above the top of the fixed plate 3, and a first damping spring 36 sleeved on the vertical rod 34 is provided between the pressure plate 35 and the horizontal plate 33. The vertical rod 34 is fixedly connected to the limit plate 345, and the limit plate 345 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 downward to the side of the lower clamping plate 31, the pressure plate 35 will preferentially contact the plastic packaging bag located on the inspection 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, so that the extension plate 37 contacts the top of the fixed plate 3, so that the fixed plate 3 limits the extension plate 37, which determines the position of the pressing plate 35, preventing the extension plate 37, the vertical rod 34, and the pressing plate 35 from continuing to move downward with the upper clamping plate 32, which 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 the first damping spring 36 is compressed, so that the pressing plate 35 no longer contacts the plastic packaging bag, and the upper clamping plate 32 and the matching lower clamping plate 31 can clamp and position the end of the plastic packaging bag, thereby facilitating the subsequent stretching test of the plastic packaging bag;

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

[0046] The sleeve rod 313 is provided with a slide groove 314, and the two sides of the inner wall of the slide groove 314 are fixedly connected. The positioning rod 315 is slidably connected to the slide plate 316. The third damping spring 317 mounted on the positioning rod 315 is arranged on both sides of the bottom of the slide plate 316. The slide plate 316 is fixedly connected to the slide rod 318. The two ends of the slide rod 318 slide through the sleeve rod 313 and are respectively fixedly connected to an adjustment plate 319 and a guide rod 320. The positions of the adjustment plate 319 and the stretching plate 343 correspond to each other. A plurality of ball bearings are arranged at the bottom of the adjustment plate 319. The ends of the guide rod 320 are slidably installed in the transverse groove 340 and the inclined groove 341. When the upper splint 32 drives the transverse plate 33, the connecting rod 312, the sleeve rod 313, and the adjustment plate 319 to move downward, the adjustment plate 319 contacts the plastic packaging bag on the stretching plate 343. 19 continues to move downward, and the sleeve rod 313 cooperates with the connecting rod 312 to push the rectangular block 310 on the second slide rod 39 to slide outward and compress the second damping spring 311. At the same time, this can also enable the sleeve rod 313 to cooperate with the adjusting plate 319 to drive the plastic packaging bag located 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. Through the setting of the balls, it can be ensured that the packaging bag is subjected to uniform force during the unfolding process, thereby avoiding deformation or damage of the packaging bag caused by uneven force. The flattened plastic packaging bag can more accurately reflect its true physical properties, such as tensile strength, tear strength, etc., thereby improving the accuracy and reliability of the detection. Through the setting of the balls, the friction between the adjusting plate 319 and the packaging bag is reduced, and the risk of damage to the packaging bag during the flattening process is reduced, which helps to protect the integrity of the packaging bag.

[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, and the screw rod 337 is driven to rotate by the driving motor 339, thereby driving the upper clamping plate 32 to move downward. When the upper clamping plate 32 and the cross plate 33 located on the upper clamping plate 32 move toward the side of the lower clamping plate 31, the pressing plate 35 will preferentially contact the plastic packaging bag located 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. 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 slide bar 39 to slide outward and compress the second damping spring 311. 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. In addition, 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, so that the fixed plate 3 limits the extension plate 37, which determines the position of the pressing plate 35, preventing 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 cross plate 33 and the first damping spring 36 is compressed, so that the pressing plate 35 no longer contacts the plastic packaging bag, and the upper clamping plate 32, in cooperation with the lower clamping plate 31, can clamp and position the end of the plastic packaging bag, thereby facilitating the subsequent stretching test of the plastic packaging bag;

[0050] Then, the first cylinder 12 is turned on to drive the movable plate 4 to move to one side, so that the control component on the movable plate 4 drives the plastic packaging bag to be tested to perform a tensile test. During the test, the changes in the tensile curve are observed, and key parameters such as elastic modulus, yield strength, and fracture strength are recorded. After the test is completed, the test data is collected and sorted, and the data is statistically analyzed to obtain indicators such as the average tensile strength and standard deviation of the packaging bag. Based on the test results, it is evaluated whether the strength and durability of the packaging bag meet the preset requirements. If not, the reasons need to be analyzed and corresponding measures need to be taken to improve it.

[0051] When the position of the plastic packaging bag is to be detected, the second cylinder 324 can drive the first connecting plate 323 to move downward, so that the first connecting plate 323 drives the pressure rod 322, the limit block 325, the elastic plate 329 and the clamping block 330 to move downward, and compress the fourth damping spring 326, so that the clamping block 330 can actively slide out of the first clamping groove 327, and then the clamping block 330 moves into the second clamping groove 328, and the position of the pressure rod 322 is fixed. When the bottom end of the pressure rod 322 moves to the position below the bottom end of the upper clamping plate 32, as the upper clamping plate 32, the cross plate 33, the fixing column 321, and the pressure rod 322 move downward, the bottom of the pressure rod 322 clamps and positions the single position of the plastic packaging bag on the cross plate 33 at the end of the lower clamping plate 31, thereby facilitating the subsequent detection and processing of the single position of the plastic packaging bag;

[0052] By opening the third cylinder 336, the second connecting plate 335 is driven to move toward the side of the fixed column 321. The second connecting plate 335 drives the cross bar 332 and the push block 333 to move toward the side of the second slot 328, and compresses the fifth damping spring 334, so that the push block 333 pushes the block 330 located in the second slot 328 to move inward, thereby releasing the restriction of the second slot 328 on the block 330. At this time, the pressure rod 322 can move upward.

[0053] 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 detection method for the production of plastic packaging bags, characterized in that: The specific steps include: Step 1: Positioning and initial contact: Place the plastic packaging bag on the testing table (2) on top of the base (1), and drive the screw (337) to rotate via the driving motor (339) to move the upper clamping plate (32) and its cross plate (33) downward, so that the upper clamping plate (32) first contacts the packaging bag for initial positioning; Step 2, stretching and unfolding: after the pressing plate (35) contacts, the adjusting plate (319) contacts the packaging bag and pushes it to move to both sides, and the stretching, unfolding and flattening are achieved with the assistance of the ball bearings; Step 3: clamping and positioning: the upper clamping plate (32) continues to move downward, the extension plate (37) contacts and is limited with the fixed plate (3), and the position of the pressing plate (35) is determined. Subsequently, the lower clamping plate (31) and the upper clamping plate (32) cooperate to clamp the end of the packaging bag to prepare for the stretching test, and then the first cylinder (12) is turned on to drive the movable plate (4) to move to one side, so that the control component on the movable plate (4) drives the plastic packaging bag to be tested to perform the stretching test; The top of the base (1) is fixedly connected to a detection platform (2), and a fixed plate (3) and a movable plate (4) are respectively arranged on both sides of the detection platform (2), and control components are arranged on the inner ends of the fixed plate (3) and the movable plate (4); The control component comprises a lower clamping plate (31) and an upper clamping plate (32), wherein the lower clamping plate (31) is fixedly mounted on the fixed plate (3), and the upper clamping plate (32) is slidably mounted on the fixed plate (3). The inner ends of the lower clamping plate (31) and the upper clamping plate (32) are fixedly connected to a transverse plate (33), and fixed columns (321) are fixedly connected to both sides of the upper transverse plate (33). A pressure rod (322) is slidably connected to the fixed column (321), and the tops of all the pressure rods (322) are fixedly connected to a first connecting plate (323), and the lower ends of the pressure rods (322) are fixedly connected to a limit block (325) slidably mounted in the fixed column (321), and the bottom of the limit block (325) is provided with a fourth damping spring (326) sleeved on the pressure rod (322), and the bottom of the first connecting plate (323) is provided with a second cylinder (324) fixedly mounted on the transverse plate (33) on both sides.

2. A method for detecting plastic packaging bag production according to claim 1, characterized in that: A first card slot (327) and a second card slot (328) are provided at upper and lower positions on the surface of the fixed column (321); an elastic plate (329) is provided on the top of the limit block (325); a card block (330) corresponding to the specifications of the first card slot (327) and the second card slot (328) is provided on the top of the elastic plate (329); a fixed frame (331) fixedly installed on the outer wall of the fixed column (321) is provided on one side of the second card slot (328); and the fixed frame (331) is provided on the outer wall of the fixed column (321). A cross bar (332) is slidably connected to the upper surface of the cross bar (31), one end of the cross bar (332) close to the second slot (328) is fixedly connected to a push block (333), the other end of the cross bar (332) passes through the fixed frame (331) and is fixedly connected to a second connecting plate (335), a fifth damping spring (334) is sleeved on the outer wall of the cross bar (332), and a third cylinder (336) fixedly mounted on the upper clamping plate (32) is provided at the outer end of the second connecting plate (335).

3. A method for detecting plastic packaging bag production according to claim 1, characterized in that: A screw rod (337) is rotatably connected to the fixing plate (3), a driving motor (339) is arranged on the top of the screw rod (337), third sliding rods (338) are arranged on both sides of the screw rod (337), the upper clamping plate (32) is threadedly connected to the screw rod (337), and the upper clamping plate (32) is slidably mounted on the third sliding rod (338), and transverse grooves (340) are opened on both sides of the surface of the fixing plate (3), and inclined grooves (341) are arranged at both ends of the transverse groove (340).

4. A method for detecting 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 stretching plate (343) is slidably connected to the fixed rods (342), and a tension spring (344) sleeved on the fixed rods (342) is provided between the stretching plate (343) and the horizontal plate (33).

5. A method for detecting plastic packaging bag production according to claim 1, characterized in that: 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; and an end of the extension plate (37) is located directly above the top of the fixed plate (3); a first damping spring (36) sleeved on the vertical rod (34) is provided between the pressure plate (35) and the horizontal plate (33); a limiting plate (345) is fixedly connected to the vertical rod (34), and the limiting plate (345) is located above the horizontal plate (33).

6. A method for detecting plastic packaging bag production according to claim 1, characterized in that: A rectangular groove (38) is provided at the inner end of the upper horizontal plate (33), a second sliding rod (39) is fixedly connected in the rectangular groove (38), a rectangular block (310) is slidably connected to the second sliding rod (39), a second damping spring (311) sleeved on the second sliding rod (39) is provided 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), and a sleeve rod (313) is rotatably connected to the other end of the connecting rod (312).

7. A method for detecting plastic packaging bag production according to claim 1, characterized in that: A slide groove (314) is provided inside the sleeve rod (313), and positioning rods (315) are fixedly connected to the inner walls of the slide groove (314) on both sides. A slide plate (316) is slidably connected to the positioning rod (315), and third damping springs (317) sleeved on the positioning rod (315) are arranged on both sides of the bottom of the slide plate (316). A slide rod (318) is fixedly connected to the slide plate (316), and both ends of the slide rod (318) slide through the sleeve rod (313) and are respectively fixedly connected to an adjustment plate (319) and a guide rod (320), and the positions of the adjustment plate (319) and the stretching plate (343) correspond to each other, and a plurality of balls are arranged at the bottom of the adjustment plate (319), and the ends of the guide rod (320) are slidably installed in the transverse groove (340) and the inclined groove (341).

8. A method for detecting plastic packaging bag production according to claim 1, characterized in that: The two ends of the top of the base (1) are fixedly connected with a first slide bar (11), and the moving plate (4) is slidably mounted on the first slide bar (11). The right side of the moving plate (4) is provided with a first cylinder (12) fixedly mounted on the base (1).

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