An automated airtightness testing device for flexible packaging bags

Abstract

This invention relates to the field of airtightness testing technology, and more particularly to an automated airtightness testing device for flexible packaging bags. The technical problem is that current methods for testing the airtightness of self-sealing bags are time-consuming, and more importantly, these methods fail to pinpoint the location of leaks, making it impossible to determine the pattern of leaks and hindering the development of improvement measures. The technical solution is an automated airtightness testing device for flexible packaging bags, including base feet, a first mounting plate, and a cleaning unit; the first mounting plate is fixedly connected to the top of the four base feet; the cleaning unit is connected to the upper left side of the first mounting plate. This invention uses a cleaning roller with a fuzzy outer surface to unfold the self-sealing bag and clean the surface dirt to avoid affecting subsequent testing. It also uses a vacuum suction cup to separate the sealing strip of the self-sealing bag, opening the bag's opening. This replaces manual processing, improving efficiency and preventing surface dirt accumulation on the self-sealing bag.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing technology, and more particularly to an automated airtightness testing device for flexible packaging bags. Background Technology

[0002] Self-sealing bags are flexible packaging bags that can be automatically sealed by compression. Currently, testing the airtightness of self-sealing bags requires opening and closing the ribs of the bag, typically done manually by separating the sealing strip. Because self-sealing bags are soft and easily folded, this process is labor-intensive and inefficient, and can easily cause dirt to accumulate on the bag's surface, affecting subsequent testing. Airtightness testing is usually done using vacuum detectors or penetrating liquids, but these methods are time-consuming. More importantly, these methods cannot pinpoint the location of leaks, making it impossible to determine the distribution pattern of leaks and hindering the development of improvement measures. Furthermore, self-sealing bags are easily impacted during use, and current testing methods cannot simulate whether a self-sealing bag will leak when subjected to impact, resulting in unsatisfactory testing results. Summary of the Invention

[0003] To overcome the shortcomings of current methods for testing the air tightness of self-sealing bags, which are time-consuming and, more importantly, fail to identify the location of leaks and thus cannot determine the pattern of leaks, thus hindering the development of improvement measures, this invention provides an automated air tightness testing device for flexible packaging bags.

[0004] The technical solution is as follows: An automated airtightness testing device for flexible packaging bags includes four feet and a first mounting plate. The first mounting plate is fixedly connected to the top of the four feet. It also includes a simulation roller, a cleaning unit, a separation unit, a simulation unit, a detection unit, and a conveying unit. A cleaning unit is connected to the upper left side of the first mounting plate, used to remove dirt from the surface of the self-sealing bag. A separation unit is connected to the upper left side of the first mounting plate, and the cleaning unit is located inside the separation unit, used to open the opening of the self-sealing bag. Two simulation units are connected to the upper left side of the first mounting plate, arranged symmetrically front to back, and located to the right of the separation unit. Each simulation unit is connected to a simulation roller, used to move the two simulation rollers to simulate the impacts that the self-sealing bag is prone to during use. Two detection units are connected to the upper right side of the first mounting plate, arranged symmetrically front to back, used to detect the airtightness of the self-sealing bag. The two detection units are connected to a conveying unit, used to convey the self-sealing bag and inflate it.

[0005] Furthermore, the cleaning unit includes a first mounting frame, a first limiting plate, a first motor, a cleaning roller, a scraper, a second mounting plate, and a collection box; the first mounting frame is fixedly connected to the upper left side of the first mounting plate; two first limiting plates are fixedly connected to the right side of the first mounting frame, and the two first limiting plates are arranged symmetrically front and back; a cleaning roller is rotatably connected to the upper part of each of the two first limiting plates; two first motors are fixedly connected to the left side of the first mounting frame, and the two first motors are arranged symmetrically front and back; each of the two first motors is rotatably connected to a cleaning roller; a scraper is fixedly connected to the upper part of the opposite sides of the two first limiting plates; each of the two scrapers contacts a cleaning roller; a second mounting plate is fixedly connected to the upper part of the opposite sides of the two first limiting plates, and the two second mounting plates are located below the two scrapers; a collection box is placed on top of each of the two second mounting plates.

[0006] Furthermore, the separation unit includes a second mounting bracket, a first cylinder, and a vacuum suction cup; two second mounting brackets are fixedly connected to the upper left side of the first mounting plate, and the two second mounting brackets are arranged symmetrically front and back, with the first mounting bracket located between the two second mounting brackets; a first cylinder is fixedly connected to the opposite side of each of the two second mounting brackets; a vacuum suction cup is fixedly connected to the telescopic end of each of the two first cylinders.

[0007] Furthermore, the rear simulation unit includes a third mounting bracket, a first electric slide rail, a first electric slider, a spring telescopic rod, and a third mounting plate; two third mounting brackets are fixedly connected to the upper left side of the first mounting plate, and the two third mounting brackets are arranged symmetrically from left to right, and the two third mounting brackets are located to the right of the two second mounting brackets; a first electric slide rail is fixedly connected to the front side of each of the two third mounting brackets; a first electric slider is slidably connected to each of the two first electric slide rails; a spring telescopic rod is fixedly connected to the front side of each of the two first electric sliders; a third mounting plate is fixedly connected to the telescopic end of each of the two spring telescopic rods; both third mounting plates are rotatably connected to the simulation roller.

[0008] Furthermore, the rear detection unit includes a fourth mounting bracket, a second cylinder, a second limiting plate, a fifth mounting bracket, a sixth mounting bracket, a winding roller, a fourth mounting plate, a mounting block, a fifth mounting plate, an arc-shaped plate, a second motor, a seventh mounting bracket, and a nozzle; the fourth mounting bracket is fixedly connected to the upper right side of the first mounting plate; the second cylinder is fixedly connected to the front side of the fourth mounting bracket; the second limiting plate is fixedly connected to the telescopic end of the second cylinder, and the front part of the second limiting plate is arc-shaped; two fifth mounting brackets are fixedly connected to the upper right side of the first mounting plate, and the two fifth mounting brackets are arranged symmetrically from left to right; a sixth mounting bracket is fixedly connected to the front side of each of the two fifth mounting brackets. Mounting brackets; each of the two sixth mounting brackets has a winding roller rotatably connected to its front part; each of the two sixth mounting brackets has a second motor fixedly connected to its upper side; each of the two second motors is fixedly connected to a winding roller; each of the two fifth mounting brackets has a fourth mounting plate fixedly connected to its upper and lower parts; each of the two fourth mounting plates has a mounting block fixedly connected to its front side, the front of the mounting block being arc-shaped; each of the two mounting blocks has a fifth mounting plate fixedly connected to its opposite side; each of the two fifth mounting plates has an arc-shaped plate fixedly connected to its facing side; a seventh mounting bracket is fixedly connected to the lower front part of the fifth mounting bracket on the left; a nozzle is fixedly connected to the rear side of the seventh mounting bracket.

[0009] Furthermore, it includes a sixth mounting plate, a linear transmission mechanism, a seventh mounting plate, an eighth mounting plate, a third electric slide rail, a third electric slider, a ninth mounting plate, a clamping plate, a third cylinder, a tenth mounting plate, and an injection tube; the sixth mounting plate is fixedly connected between the two fourth mounting brackets; the linear transmission mechanism is fixedly connected to the lower side of the sixth mounting plate; the linear transmission mechanism is connected to the seventh mounting plate; the eighth mounting plate is fixedly connected to the lower right side of the seventh mounting plate; the third electric slide rail is fixedly connected to the lower left side of the eighth mounting plate; two third electric sliders are slidably connected to the third electric slide rail, and the two third electric sliders are arranged symmetrically front and back; a ninth mounting plate is fixedly connected to the left side of each of the two third electric sliders; a clamping plate is fixedly connected to the opposing sides of each of the two ninth mounting plates; a third cylinder is fixedly connected to the lower left side of the seventh mounting plate; the tenth mounting plate is fixedly connected to the telescopic end of the third cylinder; and an injection tube is fixedly connected to the left side of the tenth mounting plate.

[0010] Furthermore, the outer surface of the simulated roller is provided with protrusions to simulate the impacts that self-sealing bags are susceptible to during use.

[0011] Furthermore, the outer surface of the cleaning roller is provided with lint to remove dirt from the surface of the self-sealing bag.

[0012] Furthermore, the nozzle is equipped with a spray nozzle for spraying the color-changing liquid onto the color-changing film.

[0013] Furthermore, the clamp is elastic and used to hold the injection tube in place.

[0014] The present invention has the following advantages: 1. The present invention uses a cleaning roller with lint on its outer surface to unfold the self-sealing bag and clean the dirt on the surface of the self-sealing bag to avoid affecting subsequent testing. The present invention also uses a vacuum suction cup to separate the sealing strip of the self-sealing bag, that is, to open the opening of the self-sealing bag. This replaces manual processing, improves efficiency, and avoids causing dirt on the surface of the self-sealing bag.

[0015] 2. The present invention uses a simulated roller with protrusions on its outer surface to squeeze and impact the self-sealing bag, thereby simulating the impact that the self-sealing bag is subjected to during use and improving the reliability of the test.

[0016] 3. This invention uses color-changing liquid and color-changing gas to detect the airtightness of self-sealing bags, and uses a second limiting plate to print the color-changing liquid on the self-sealing bag to determine the location of air leakage. This allows for the determination of the distribution pattern of the leakage locations, which facilitates the formulation of improvement measures. Attached Figure Description

[0017] Figure 1 This is a first three-dimensional structural schematic diagram of the automated airtightness testing device for flexible packaging bags according to the present invention.

[0018] Figure 2 This is a schematic diagram of a second three-dimensional structure of the automated airtightness testing device for flexible packaging bags according to the present invention.

[0019] Figure 3 This is a partial three-dimensional structural diagram of the automated airtightness testing device for flexible packaging bags according to the present invention.

[0020] Figure 4 This is a three-dimensional structural cross-sectional view of the cleaning unit of the automated airtightness testing device for flexible packaging bags of the present invention;

[0021] Figure 5 This is a partial three-dimensional structural diagram of the separation unit of the automated airtightness testing device for flexible packaging bags of the present invention;

[0022] Figure 6 This is a schematic diagram of the simulated unit of the automated airtightness testing device for flexible packaging bags of the present invention.

[0023] Figure 7 This is an enlarged schematic diagram of point A in the automated airtightness testing device for flexible packaging bags of the present invention.

[0024] Figure 8 This is a schematic diagram of a second partial three-dimensional structure of the automated airtightness testing device for flexible packaging bags according to the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the detection unit of the automated airtightness testing device for flexible packaging bags of the present invention.

[0026] Figure 10This is a partial three-dimensional structural diagram of the detection unit of the automated airtightness testing device for flexible packaging bags of the present invention.

[0027] Figure 11 This is a schematic diagram of a second partial three-dimensional structure of the detection unit of the automated airtightness testing device for flexible packaging bags of the present invention.

[0028] Figure 12 This is a partial three-dimensional structural diagram of the conveying unit of the automated airtightness testing equipment for flexible packaging bags of the present invention.

[0029] Reference numerals: 1-Base, 2-First mounting plate, 201-First mounting bracket, 202-First limiting plate, 203-First motor, 204-Clearing roller, 205-Scraper, 206-Second mounting plate, 207-Collection box, 301-Second mounting bracket, 302-First cylinder, 303-Vacuum suction cup, 401-Third mounting bracket, 402-First electric slide rail, 403-First electric slider, 404-Spring telescopic rod, 405-Third mounting plate, 406-Simulated roller, 501-Fourth mounting bracket, 502-Second cylinder, 503-Second limiting plate, 504-Fifth mounting bracket 505-Sixth mounting bracket, 506-Winding roller, 507-Fourth mounting plate, 508-Mounting block, 509-Fifth mounting plate, 5010-Arc plate, 5011-Second motor, 5012-Seventh mounting bracket, 5013-Nozzle, 601-Sixth mounting plate, 602-Second electric slide rail, 603-Second electric slider, 604-Seventh mounting plate, 605-Eighth mounting plate, 606-Third electric slide rail, 607-Third electric slider, 608-Ninth mounting plate, 609-Clamping plate, 6010-Third cylinder, 6011-Tenth mounting plate, 6012-Injection tube. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example

[0032] An automated airtightness testing device for flexible packaging bags, such as Figure 1-12 As shown, it includes base feet 1 and a first mounting plate 2; the top of the four base feet 1 is fixedly connected to the first mounting plate 2;

[0033] It also includes a simulation roller 406, a cleaning unit, a separation unit, a simulation unit, a detection unit, and a conveying unit; the cleaning unit is connected to the upper left side of the first mounting plate 2; the separation unit is connected to the upper left side of the first mounting plate 2, and the cleaning unit is located inside the separation unit; two simulation units are connected to the upper left side of the first mounting plate 2, and the two simulation units are arranged symmetrically front and back, and the two simulation units are located to the right of the separation unit; each of the two simulation units is connected to a simulation roller 406; two detection units are connected to the upper right side of the first mounting plate 2, and the two detection units are arranged symmetrically front and back; the two detection units are connected to the conveying unit together.

[0034] The cleaning unit includes a first mounting frame 201, a first limiting plate 202, a first motor 203, a cleaning roller 204, a scraper 205, a second mounting plate 206, and a collection box 207. The first mounting plate 206 is bolted to the upper left side of the first mounting frame 201. Two first limiting plates 202 are fixedly connected to the right side of the first mounting frame 201, and the two first limiting plates 202 are symmetrically arranged front and rear. A cleaning roller 204 is rotatably connected to the upper part of each of the two first limiting plates 202. Two first motors 203 are bolted to the left side of the first mounting frame 201. 03, and the two first motors 203 are arranged symmetrically in front and behind; the two first motors 203 are rotatably connected to a cleaning roller 204 respectively; a scraper 205 is fixedly connected to the upper part of the opposite side of the two first limiting plates 202 respectively; the two scrapers 205 are in contact with a cleaning roller 204 respectively; a second mounting plate 206 is fixedly connected to the upper part of the opposite side of the two first limiting plates 202 respectively, and the two second mounting plates 206 are located below the two scrapers 205; a collection box 207 is placed on top of the two second mounting plates 206 respectively.

[0035] The separation unit includes a second mounting bracket 301, a first cylinder 302, and a vacuum suction cup 303; two second mounting brackets 301 are bolted to the upper left side of the first mounting plate 2, and the two second mounting brackets 301 are arranged symmetrically front and back, and the first mounting bracket 201 is located between the two second mounting brackets 301; a first cylinder 302 is bolted to the opposite side of each of the two second mounting brackets 301; a vacuum suction cup 303 is fixed to the telescopic end of each of the two first cylinders 302.

[0036] The rear simulation unit includes a third mounting bracket 401, a first electric slide rail 402, a first electric slider 403, a spring telescopic rod 404, and a third mounting plate 405. Two third mounting brackets 401 are bolted to the upper left side of the first mounting plate 2, and the two third mounting brackets 401 are arranged symmetrically to the left and right, located to the right of the two second mounting brackets 301. A first electric slide rail 402 is bolted to the front of each of the two third mounting brackets 401. A first electric slider 403 is slidably connected to each of the two first electric slide rails 402. A spring telescopic rod 404 is fixed to the front of each of the two first electric sliders 403. A third mounting plate 405 is fixed to the telescopic end of each of the two spring telescopic rods 404. Both third mounting plates 405 are rotatably connected to the simulation roller 406.

[0037] The rear detection unit includes a fourth mounting bracket 501, a second cylinder 502, a second limiting plate 503, a fifth mounting bracket 504, a sixth mounting bracket 505, a winding roller 506, a fourth mounting plate 507, a mounting block 508, a fifth mounting plate 509, an arc-shaped plate 5010, a second motor 5011, a seventh mounting bracket 5012, and a nozzle 5013. The fourth mounting bracket 501 is bolted to the upper right side of the first mounting plate 2. The second cylinder 502 is bolted to the front side of the fourth mounting bracket 501. The second limiting plate 503 is fixed to the telescopic end of the second cylinder 502, and the front of the second limiting plate 503 is arc-shaped. Two fifth mounting brackets 504 are bolted to the upper right side of the first mounting plate 2, and the two fifth mounting brackets 504 are arranged symmetrically on the left and right. A [missing information - likely a device or mechanism] is bolted to the front of each of the two fifth mounting brackets 504. Two sixth mounting brackets 505 are rotatably connected to the front of each of the two sixth mounting brackets 505, and a second motor 5011 is bolted to the upper side of each of the two sixth mounting brackets 505. The two second motors 5011 are fixedly connected to a winding roller 506. A fourth mounting plate 507 is fixedly connected to the upper and lower parts of the two fifth mounting brackets 504. A mounting block 508 is fixedly connected to the front of each of the two fourth mounting plates 507, and the front of the mounting block 508 is set as an arc. A fifth mounting plate 509 is fixedly connected to the opposite side of the two mounting blocks 508. An arc plate 5010 is fixedly connected to the opposite side of the two fifth mounting plates 509. A seventh mounting bracket 5012 is fixedly connected to the lower front of the fifth mounting bracket 504 on the left. A nozzle 5013 is fixedly connected to the rear side of the seventh mounting bracket 5012.

[0038] It includes a sixth mounting plate 601, a linear transmission mechanism, a seventh mounting plate 604, an eighth mounting plate 605, a third electric slide rail 606, a third electric slider 607, a ninth mounting plate 608, a clamping plate 609, a third cylinder 6010, a tenth mounting plate 6011, and an injection tube 6012; the sixth mounting plate 601 is fixedly connected between two fourth mounting brackets 501; the linear transmission mechanism is fixedly connected to the lower side of the sixth mounting plate 601; the linear transmission mechanism is connected to the seventh mounting plate 604; the eighth mounting plate 605 is fixedly connected to the lower right side of the seventh mounting plate 604; the eighth mounting plate 605... A third electric slide rail 606 is bolted to the lower left side; two third electric sliders 607 are slidably connected to the third electric slide rail 606, and the two third electric sliders 607 are arranged symmetrically front and back; a ninth mounting plate 608 is fixed to the left side of each of the two third electric sliders 607; a clamping plate 609 is fixed to the opposite side of each of the two ninth mounting plates 608; a third cylinder 6010 is bolted to the lower left side of the seventh mounting plate 604; a tenth mounting plate 6011 is fixed to the telescopic end of the third cylinder 6010; an injection tube 6012 is fixed to the left side of the tenth mounting plate 6011.

[0039] The outer surface of the simulation roller 406 is provided with protrusions to simulate the impacts that self-sealing bags are prone to during use.

[0040] The upper part of the first mounting bracket 201 is inclined to facilitate the insertion of self-sealing bags.

[0041] The outer surface of the cleaning roller 204 is provided with lint to remove dirt from the surface of the self-sealing bag.

[0042] The nozzle 5013 is equipped with a nozzle for spraying the color-changing liquid onto the color-changing film.

[0043] The clamp 609 is elastic and is used to clamp the injection tube 6012.

[0044] The linear transmission mechanism includes a second electric slide rail 602 and a second electric slider 603; the second electric slide rail 602 is bolted to the lower side of the sixth mounting plate 601; the second electric slider 603 is slidably connected to the second electric slide rail 602; and the lower side of the second electric slider 603 is fixedly connected to the seventh mounting plate 604.

[0045] During operation, the worker places the self-sealing bag bottom-down between the two first limiting plates 202, then lowers it so that the bottom of the self-sealing bag is between the two cleaning rollers 204. The worker then releases the self-sealing bag and controls the two first motors 203 to drive the two cleaning rollers 204 to rotate. Using a right-to-left perspective, the front cleaning roller 204 rotates clockwise, and the rear cleaning roller 204 rotates counter-clockwise. In this way, the two cleaning rollers 204 push the self-sealing bag downwards, preventing it from folding due to its softness. Simultaneously, the lint on the surface of the two cleaning rollers 204 cleans the self-sealing bag, removing any lint. The dirt on the surface is cleaned off to prevent it from affecting subsequent airtightness testing. The cleaned dirt adheres to the lint, and when the cleaning roller 204 rotates and passes the scraper 205, the scraper 205 scrapes the dirt off the lint and collects it inside the scraper 205. When the part below the sealing strip of the self-sealing bag is between the two first limit plates 202, the rotation of the two cleaning rollers 204 stops, and then the two first cylinders 302 are controlled to drive the two vacuum suction cups 303 to move towards each other until they contact the front and back sides of the self-sealing bag. Then, the external air pump is controlled to start, so that the two vacuum suction cups 303 generate suction to suck up the front and back of the opening of the self-sealing bag. Then, the two first cylinders 302 are controlled to drive the two vacuum suction cups 303 to move in opposite directions, opening the self-sealing bag. Next, the second electric slide rail 602 is controlled to drive the second electric slider 603 to move to the left. The second electric slider 603 drives the seventh mounting plate 604, the eighth mounting plate 605, the third electric slide rail 606, the third electric slider 607, the ninth mounting plate 608, the clamping plate 609, the third cylinder 6010, the tenth mounting plate 6011, and the injection tube 6012 to move until the injection tube 6012 is directly above the self-sealing bag. Afterwards, the third cylinder 6010 is controlled to drive the tenth mounting plate 6011 and the injection tube 6012 to move. 12 moves downward, allowing the injection tube 6012 to be inserted into the self-sealing bag. Then, the two vacuum suction cups 303 are controlled to stop adsorbing the self-sealing bag, and then the two vacuum suction cups 303 are controlled to move away from each other and reset. Then, the third electric slide rail 606 is controlled to drive the two third electric sliders 607 to move towards each other. The third electric sliders 607 drive the ninth mounting plate 608 and the clamping plate 609 to move, so that the two clamping plates 609 move towards each other until they contact each other. During this process, they contact the front and rear of the opening of the self-sealing bag, and then drive the front and rear of the opening of the self-sealing bag to close, thus sealing the opening. The self-sealing bag is only connected to the outside world through the injection tube 6012.

[0046] Then, the second electric slide rail 602 is controlled to drive the second electric slider 603 to move to the right, causing the two clamping plates 609 and the clamped self-sealing bag to move to the right, moving away from the two first limiting plates 202, so that the self-sealing bag is located between the two simulated rollers 406. Then, the external air pump is controlled to inject detection gas into the self-sealing bag through the injection tube 6012, causing the self-sealing bag to expand. Excessive expansion is avoided to ensure the self-sealing bag can pass through the gap between the two seventh mounting brackets 5012. During the expansion of the self-sealing bag, it contacts the two simulated rollers 406, which then drive the two simulated rollers 406 to move in opposite directions, compressing the two spring telescopic rods 404. This causes the two simulated rollers 406 to have a tendency to move relative to each other, i.e., to... The self-sealing bag is kept under compression. Then, the front and rear simulation units are activated simultaneously to drive two simulation rollers 406 downward, causing them to roll on the self-sealing bag. During the rolling process, the two simulation rollers 406 compress and impact the self-sealing bag, thus simulating the impact the self-sealing bag experiences during use. The protrusions on the outer surface of the simulation rollers 406 amplify the impact force. When the front simulation unit is working, the two first electric slide rails 402 drive the two first electric sliders 403 downward. The two first electric sliders 403 drive the two spring telescopic rods 404 and the two third mounting plates 405 downward. The two third mounting plates 405 drive the simulation rollers 406 downward.

[0047] After the simulated impact, the second electric slide rail 602 is controlled to drive the second electric slider 603 to move to the right, causing the two clamping plates 609 and the clamped self-sealing bag to move to the right, positioning the self-sealing bag between the two detection units. Then, the two detection units are controlled to start detecting the airtightness of the self-sealing bag. When the rear detection unit is working, the left winding roller 506 winds up the color-changing film. The color-changing film can absorb the color-changing liquid. The upper and lower parts of the color-changing film pass through the gap between the mounting block 508 and the arc plate 5010, respectively, and then wrap around the winding roller 506, thus causing the color to change. The film is arc-shaped between the two second limiting plates 503. Then, the second motor 5011 on the right drives the winding roller 506 to rotate and wind up the color-changing film. During winding, an external liquid pump sprays the color-changing liquid through the nozzle 5013 onto the color-changing film, causing the film to absorb the liquid. Then, an external air pump injects detection gas into the self-sealing bag through the injection tube 6012, causing the self-sealing bag to expand to its limit. After expansion, the self-sealing bag is elliptical and positioned between the two second limiting plates 503. If the self-sealing bag has an airtightness problem, the detection gas will... The leaked liquid sprays onto the color-changing film. When the detection gas comes into contact with the color-changing liquid, it causes the liquid to change color. This triggers two detection units to mark the self-sealing bag, pinpointing the exact location of the leak. When the rear detection unit activates, it controls the second cylinder 502 to move the second limit plate 503 forward. The second limit plate 503 moves forward and contacts the color-changing film. Because the film is elastic, the second limit plate 503, upon contact, moves its contact portion forward to adhere to the rear of the self-sealing bag, thus attaching the color-changing liquid to the bag. Then, the second cylinder 502 is controlled to move the second limit plate 503 backward to reset. Next, the second electric slide rail 602 is controlled to move the second electric slider 603 to the right, so that the self-sealing bag is removed from between the two detection units. At this time, the staff can observe whether the color-changing liquid on the surface of the self-sealing bag has changed color to determine whether there is a problem with the airtightness of the self-sealing bag and can accurately locate the leakage point. Finally, the external air pump is controlled to suck away and recover the gas in the self-sealing bag, and the two clamps 609 are controlled to move in opposite directions to release the clamp on the self-sealing bag. The self-sealing bag can then be removed and stored.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An automated airtightness testing device for flexible packaging bags, comprising base feet and a first mounting plate; the first mounting plate is fixedly connected to the top of the four base feet; characterized in that, It also includes a simulation roller, a cleaning unit, a separation unit, a simulation unit, a detection unit, and a conveying unit. A cleaning unit is connected to the upper left side of the first mounting plate; this cleaning unit is used to remove dirt from the surface of the self-sealing bag. A separation unit is connected to the upper left side of the first mounting plate, and the cleaning unit is located inside the separation unit; the separation unit is used to open the opening of the self-sealing bag. Two simulation units are connected to the upper left side of the first mounting plate, and the two simulation units are arranged symmetrically front to back, and are located to the right of the separation unit. Each of the two simulation units is connected to a simulation roller, and the two simulation units are used to move the two simulation rollers to simulate the impacts that the self-sealing bag is prone to during use. Two detection units are connected to the upper right side of the first mounting plate, and the two detection units are arranged symmetrically front to back; these detection units are used to detect the airtightness of the self-sealing bag. The two detection units are connected to a conveying unit, which is used to convey the self-sealing bag and inflate it. The rear detection unit includes a fourth mounting bracket, a second cylinder, a second limiting plate, a fifth mounting bracket, a sixth mounting bracket, a winding roller, a fourth mounting plate, a mounting block, a fifth mounting plate, an arc-shaped plate, a second motor, a seventh mounting bracket, and a nozzle. The fourth mounting bracket is fixedly attached to the upper right side of the first mounting plate. The second cylinder is fixedly attached to the front side of the fourth mounting bracket. The second limiting plate is fixedly attached to the telescopic end of the second cylinder, and the front of the second limiting plate is arc-shaped. Two fifth mounting brackets are fixedly attached to the upper right side of the first mounting plate, and the two fifth mounting brackets are arranged symmetrically from left to right. A sixth mounting bracket is fixedly attached to the front side of each of the two fifth mounting brackets. Two sixth mounting frames are rotatably connected to a winding roller at their front parts; a second motor is fixedly connected to the upper side of each of the two sixth mounting frames; each of the two second motors is fixedly connected to a winding roller; a fourth mounting plate is fixedly connected to the upper and lower parts of the two fifth mounting frames; a mounting block is fixedly connected to the front side of each of the two fourth mounting plates, and the front part of the mounting block is set as an arc; a fifth mounting plate is fixedly connected to the opposite side of the two mounting blocks; an arc-shaped plate is fixedly connected to the opposite side of the two fifth mounting plates; a seventh mounting frame is fixedly connected to the lower front part of the fifth mounting frame on the left; a nozzle is fixedly connected to the rear side of the seventh mounting frame.

2. The automated airtightness testing equipment for flexible packaging bags according to claim 1, characterized in that, The cleaning unit includes a first mounting frame, a first limiting plate, a first motor, a cleaning roller, a scraper, a second mounting plate, and a collection box. The first mounting frame is fixedly connected to the upper left side of the first mounting plate. Two first limiting plates are fixedly connected to the right side of the first mounting frame, and the two first limiting plates are arranged symmetrically front to back. A cleaning roller is rotatably connected to the upper part of each of the two first limiting plates. Two first motors are fixedly connected to the left side of the first mounting frame, and the two first motors are arranged symmetrically front to back. Each of the two first motors is rotatably connected to a cleaning roller. A scraper is fixedly connected to the upper part of the opposite sides of each of the two first limiting plates. Each of the two scrapers contacts a cleaning roller. A second mounting plate is fixedly connected to the upper part of the opposite sides of each of the two first limiting plates, and the two second mounting plates are located below the two scrapers. A collection box is placed above each of the two second mounting plates.

3. The automated airtightness testing equipment for flexible packaging bags according to claim 2, characterized in that, The separation unit includes a second mounting bracket, a first cylinder, and a vacuum suction cup; two second mounting brackets are fixedly attached to the upper left side of the first mounting plate, and the two second mounting brackets are arranged symmetrically front and back, with the first mounting bracket located between the two second mounting brackets; a first cylinder is fixedly attached to the opposite side of each of the two second mounting brackets; a vacuum suction cup is fixedly attached to the telescopic end of each of the two first cylinders.

4. The automated airtightness testing equipment for flexible packaging bags according to claim 3, characterized in that, The rear simulation unit includes a third mounting bracket, a first electric slide rail, a first electric slider, a spring telescopic rod, and a third mounting plate. Two third mounting brackets are fixedly attached to the upper left side of the first mounting plate, and the two third mounting brackets are arranged symmetrically from left to right, and are located to the right of the two second mounting brackets. A first electric slide rail is fixedly attached to the front of each of the two third mounting brackets. A first electric slider is slidably connected to each of the two first electric slide rails. A spring telescopic rod is fixedly attached to the front of each of the two first electric sliders. A third mounting plate is fixedly attached to the telescopic end of each of the two spring telescopic rods. Both third mounting plates are rotatably connected to the simulation roller.

5. An automated airtightness testing device for flexible packaging bags according to claim 1, characterized in that, It includes a sixth mounting plate, a linear transmission mechanism, a seventh mounting plate, an eighth mounting plate, a third electric slide rail, a third electric slider, a ninth mounting plate, a clamping plate, a third cylinder, a tenth mounting plate, and an injection tube; the sixth mounting plate is fixed between the two fourth mounting brackets; the linear transmission mechanism is fixed to the lower side of the sixth mounting plate; the linear transmission mechanism is connected to the seventh mounting plate; the eighth mounting plate is fixed to the lower right side of the seventh mounting plate; the third electric slide rail is fixed to the lower left side of the eighth mounting plate; two third electric sliders are slidably connected on the third electric slide rail, and the two third electric sliders are arranged symmetrically front and back; a ninth mounting plate is fixed to the left side of each of the two third electric sliders; a clamping plate is fixed to the facing sides of each of the two ninth mounting plates; a third cylinder is fixed to the lower left side of the seventh mounting plate; the tenth mounting plate is fixed to the telescopic end of the third cylinder; and an injection tube is fixed to the left side of the tenth mounting plate.

6. An automated airtightness testing device for flexible packaging bags according to claim 5, characterized in that, The outer surface of the simulated roller is equipped with bumps to simulate the impacts that self-sealing bags are prone to during use.

7. An automated airtightness testing device for flexible packaging bags according to claim 5, characterized in that, The outer surface of the cleaning roller is covered with lint to remove dirt from the surface of the self-sealing bag.

8. An automated airtightness testing device for flexible packaging bags according to claim 5, characterized in that, The nozzle is equipped with a spray nozzle for spraying the color-changing liquid onto the color-changing film.

9. An automated airtightness testing device for flexible packaging bags according to claim 5, characterized in that, The clamp is flexible and is used to hold the injection tube in place.

Images