Package air tightness detection device

Abstract

The utility model discloses a packaging air tightness detection device, which relates to the technical field of plastic uptake forming and comprises a workbench, a feeding conveying mechanism, a discharging conveying mechanism, a support, a pushing unit and a displacement unit are fixedly mounted on the workbench, a detection unit is fixedly mounted on the support, and a discharging unit is fixedly mounted on the displacement unit. The device has the beneficial effects that the air bag is repeatedly inflated and deflated, so that the honeycomb plate can repeatedly press the packaging bag, the flow of air in the packaging bag is increased, and the micro-crack holes are convenient to open, so that the air tightness of the packaging bag is detected more quickly; misjudgment caused by gas release of chippings in a vacuum environment is avoided, the detection efficiency and accuracy are improved, the air bag limits and extrudes the packaging bag through the honeycomb plate, excessive expansion of the packaging bag is avoided, the honeycomb plate can disperse pressure on the packaging bag, damage to the packaging bag and materials in the packaging bag due to concentrated pressure is avoided, and safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum forming technology, and in particular to a packaging airtightness testing device. Background Technology

[0002] Plastic packaging bags are bags made from plastic and used to package various daily necessities. They are widely used in both daily life and industrial production. Based on their use, plastic packaging bags are divided into two main categories: household plastic packaging bags and industrial plastic packaging bags. When manufacturing plastic packaging bags, it is crucial to pay close attention to the product's seal to ensure product quality.

[0003] A search revealed that Chinese patent application CN114878109B discloses a device for detecting the airtightness of a plastic packaging bag seal. The device mainly uses a moving component to move a pressure detector, making the detection flexible.

[0004] Compared with existing technologies in related fields, traditional single-cavity static detection relies on passive air leakage, resulting in a low detection rate for some micro-cracks. When the packaging bag deforms, it can cause blockage of micro-cracks, reducing the accuracy and efficiency of the detection. Utility Model Content

[0005] The purpose of this invention is to provide a packaging airtightness testing device to solve the above-mentioned problems.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A packaging airtightness testing device includes a workbench, on which a feeding conveyor mechanism, a discharging conveyor mechanism, a support, a pushing unit and a displacement unit are fixedly installed. A testing unit is fixedly installed on the support. The pushing unit is close to the feeding conveyor mechanism, and the displacement unit is close to the discharging conveyor mechanism. The discharging unit is fixedly installed on the displacement unit.

[0008] The detection unit includes a first cylinder, a mounting slot, and a mounting box. The mounting slot is fixedly installed on the upper surface of the workbench. The first cylinder is fixedly installed on a bracket. A vacuum cover is fixedly installed on the telescopic end of the first cylinder. A vacuum valve is fixedly installed on the upper end of the vacuum cover. A sealing component is provided at the lower end of the vacuum cover. A vacuum cover is fixedly installed in the mounting box. Airbags are fixedly installed in both the mounting box and the mounting slot. A mounting frame is fixedly installed on the airbag. A honeycomb plate is fixedly installed on the mounting frame. Through holes are arranged on the honeycomb plate. A pressure detection component is provided in both the mounting box and the airbag.

[0009] Furthermore, the detection component includes a first pressure sensor and a second pressure sensor, with the first pressure sensor fixedly installed inside the airbag and the second pressure sensor fixedly installed on the upper surface of the mounting box.

[0010] Furthermore, the sealing assembly includes a sealing ring and a sealing groove. The sealing ring is fixedly installed at the lower end of the vacuum chamber, and the sealing groove is set on the worktable, surrounding the mounting groove and located directly below the sealing ring.

[0011] Furthermore, the pushing unit includes a second cylinder, which is fixedly installed on the worktable. A push plate is fixedly installed on the telescopic end of the second cylinder, and the push plate is slidably connected to the feeding and conveying mechanism.

[0012] Furthermore, the sides of the push plate are provided with suction holes, and the upper surface of the push plate is provided with a suction valve that connects to the suction holes.

[0013] Furthermore, the displacement unit includes a motor and a lead screw. The motor is fixedly mounted on the side of the worktable, and the lead screw is rotatably mounted on the worktable. The lead screw is located near the feeding conveyor mechanism. The lead screw is fixedly connected to the output shaft of the motor. A slider is installed on the lead screw through a threaded connection, and a feeding unit is fixedly mounted on the slider.

[0014] Furthermore, the unloading unit includes a third cylinder, which is fixedly mounted on the slider. A support frame is fixedly mounted on the telescopic end of the third cylinder, and a fourth cylinder is fixedly mounted on the support frame. A suction cup mechanism is fixedly mounted on the telescopic end of the fourth cylinder.

[0015] The advantages compared to existing technologies are as follows:

[0016] 1. By repeatedly inflating and deflating the airbag, the honeycomb plate can repeatedly press the packaging bag. The compression of the honeycomb plate increases the flow of gas inside the packaging bag and facilitates the opening of micro-cracks, making it easier to test the airtightness of the packaging bag more quickly, thus improving the efficiency and accuracy of the test. At the same time, the airbag limits and compresses the packaging bag through the honeycomb plate, preventing the packaging bag from over-expanding. The honeycomb plate can also distribute the pressure on the packaging bag, preventing pressure concentration from damaging the packaging bag and the materials inside, thus improving safety.

[0017] 2. During the process of pushing the packaging bag with the pusher plate, the external dust collection device absorbs the debris of the packaging bag through the dust collection valve and dust collection hole, ensuring the cleanliness of the packaging bag surface and avoiding misjudgment caused by the release of gas by the debris in the vacuum environment, thus ensuring the accuracy and efficiency of the test results. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a first isometric structural schematic diagram of the packaging airtightness testing device described in this utility model;

[0020] Figure 2 This is a cross-sectional structural schematic diagram of the packaging airtightness testing device described in this utility model;

[0021] Figure 3 This utility model describes a packaging airtightness testing device. Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This utility model describes a packaging airtightness testing device. Figure 2 Enlarged structural diagram at point B;

[0023] Figure 5 This is a second isometric structural schematic diagram of the packaging airtightness testing device described in this utility model;

[0024] Figure 6 This utility model describes a packaging airtightness testing device. Figure 5 Enlarged structural diagram at point C;

[0025] Figure 7 This utility model describes a packaging airtightness testing device. Figure 5 Enlarged structural diagram at point D.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Workbench; 2. Support frame; 301. First cylinder; 302. Vacuum hood; 303. Vacuum valve; 304. Mounting box; 305. Airbag; 306. Mounting slot; 307. Mounting bracket; 308. Honeycomb panel; 309. Through hole; 310. First pressure sensor; 311. Second pressure sensor; 312. Sealing ring; 313. Sealing groove; 401. Second cylinder; 402. Push plate; 403. Dust suction hole; 404. Dust suction valve; 501. Motor; 502. Lead screw; 503. Slider; 601. Third cylinder; 602. Support frame; 603. Fourth cylinder; 604. Suction cup mechanism; 7. Feeding conveyor mechanism; 8. Unloading conveyor mechanism. Detailed Implementation

[0028] like Figures 1-7As shown, a packaging airtightness testing device includes a workbench 1. A feeding conveyor 7, a discharging conveyor 8, a support 2, a pushing unit, and a displacement unit are fixedly installed on the workbench 1. A testing unit is fixedly installed on the support 2. The pushing unit is close to the feeding conveyor 7, and the displacement unit is close to the discharging conveyor 8. A discharging unit is fixedly installed on the displacement unit. The feeding conveyor 7 and the discharging conveyor 8 are located on opposite sides of the testing unit. There are two discharging conveyors 8, which can separate qualified and unqualified packaging bags according to the testing results for subsequent processing. During operation, the feeding conveyor 7 feeds the packaging bags. When the packaging bag moves to the pushing unit, the pushing unit pushes the packaging bag to the testing unit, where the airtightness of the packaging bag is tested. After the test, the discharging unit discharges the packaging bag. The displacement unit moves the packaging bag through the discharging unit. Based on the test results, the packaging bags are placed on different discharging conveyors 8, separating qualified and unqualified products for subsequent processing.

[0029] like Figures 1-5As shown, the detection unit includes a first cylinder 301, a mounting groove 306, and a mounting box 304. The mounting groove 306 is fixedly mounted on the upper surface of the workbench 1. The first cylinder 301 is fixedly mounted on the bracket 2. A vacuum cover 302 is fixedly mounted on the telescopic end of the first cylinder 301. A vacuum valve 303 is fixedly mounted on the upper end of the vacuum cover 302. A sealing component is provided at the lower end of the vacuum cover 302. The vacuum cover 302 is fixedly mounted on the mounting box 304. Airbags 305 are fixedly mounted in both the mounting box 304 and the mounting groove 306. A mounting bracket 307 is fixedly mounted on the airbag 305. A honeycomb plate 308 is fixedly mounted on the mounting bracket 307. The honeycomb panel 308 has through holes 309 arranged on it. Both the mounting box 304 and the airbag 305 are equipped with air pressure detection components. The first cylinder 301, vacuum valve 303, and airbag 305 operate using existing technology. All three components are connected to an external inflation / deflation control mechanism. After the packaging bag to be tested is placed on the honeycomb panel 308, the first cylinder 301 moves the vacuum cover 302 to the worktable 1. A sealing component improves the seal between the vacuum cover 302 and the worktable 1 to prevent air leakage. The external inflation / deflation control mechanism inflates the airbag 305. 05. The honeycomb plate 308 clamps and limits the packaging bag, improving its stability. The honeycomb plate 308 also reduces the contact area with the packaging bag, preventing obstruction of micro-cracks. A pressure detection component monitors the gas pressure inside the airbag 305 and vacuum chamber 302. An external inflation / deflation control mechanism extracts air from the vacuum chamber 302 via the vacuum valve 303, creating a pressure difference between the inside and outside of the packaging bag, causing it to expand. The honeycomb plate 308 limits and compresses the packaging bag, preventing excessive expansion. Furthermore, the honeycomb plate 308 disperses pressure on the packaging bag, preventing pressure concentration from damaging it. The internal materials enhance safety. Simultaneously, based on the gas pressure within the vacuum chamber 302 and the airbag 305, the airbag 305 is repeatedly inflated and deflated, allowing the honeycomb plate 308 to repeatedly press the packaging bag. This compression increases gas flow within the packaging bag, facilitating the opening of micro-cracks and enabling faster detection of the bag's airtightness, thus improving detection efficiency and accuracy. During vacuuming, the honeycomb plate 308 connects to the vacuum chamber 302 via the through-hole 309, ensuring unaffected vacuuming efficiency. After vacuuming, the airtightness of the packaging bag is determined by the pressure change detected by the air pressure detection component.

[0030] like Figure 3 , Figure 4As shown, the detection assembly includes a first pressure sensor 310 and a second pressure sensor 311. The first pressure sensor 310 is fixedly installed inside the airbag 305, and the second pressure sensor 311 is fixedly installed on the upper surface of the mounting box 304. The first pressure sensor 310 and the second pressure sensor 311 operate using existing technology. During the detection process, the first pressure sensor 310 detects the gas pressure inside the airbag 305, and the second pressure sensor 311 detects the gas pressure inside the vacuum chamber 302, making it easy for operators to monitor the pressure of the vacuum chamber 302 and the airbag 305.

[0031] like Figure 1 , Figure 2 , Figure 5 The sealing assembly includes a sealing ring 312 and a sealing groove 313. The sealing ring 312 is fixedly installed at the lower end of the vacuum hood 302, and the sealing groove 313 is set on the worktable 1. The sealing groove 313 surrounds the mounting groove 306 and is located directly below the sealing ring 312. During the test, the vacuum hood 302 drives the sealing ring 312 into the sealing groove 313. The sealing effect between the vacuum hood 302 and the worktable 1 is improved through the sealing ring 312 and the sealing groove 313, which prevents air leakage and ensures the efficiency and effectiveness of the test.

[0032] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the feeding unit includes a second cylinder 401, which is fixedly installed on the workbench 1. A push plate 402 is fixedly installed on the telescopic end of the second cylinder 401. The push plate 402 is slidably connected to the feeding conveying mechanism 7. The second cylinder 401 operates using existing technology and is connected to an external inflation / deflation control mechanism. After the packaging bag on the feeding conveying mechanism 7 is delivered to the correct position, the second cylinder 401 drives the push plate 402 to move. The push plate 402 pushes the packaging bag on the feeding conveying mechanism 7, causing the packaging bag to move below the vacuum hood 302, thus completing the automatic feeding of the packaging bag and improving the detection efficiency.

[0033] like Figure 6 As shown, the push plate 402 has dust suction holes 403 arranged on its side, and a dust suction valve 404 connected to the dust suction holes 403 is provided on the upper surface of the push plate 402. The dust suction valve 404 is connected to an external dust suction device. During the process of the push plate 402 pushing and feeding the packaging bag, the packaging bag vibrates during its sliding process, and the debris on the packaging bag moves. At the same time, the external dust suction device absorbs the debris on the packaging bag through the dust suction valve 404 and the dust suction holes 403, ensuring the cleanliness of the packaging bag surface and avoiding misjudgment caused by the release of gas by the debris in a vacuum environment, thus ensuring the accuracy and efficiency of the test results.

[0034] like Figure 5 , Figure 7 As shown, the displacement unit includes a motor 501 and a lead screw 502. The motor 501 is fixedly installed on the side of the worktable 1, and the lead screw 502 is rotatably installed on the worktable 1. The lead screw 502 is located near the unloading conveyor mechanism 8. The lead screw 502 is fixedly connected to the output shaft of the motor 501. A slider 503 is installed on the lead screw 502 through a threaded connection. The unloading unit is fixedly installed on the slider 503. The motor 501 operates using existing technology. The motor 501 drives the lead screw 502 to rotate, and the lead screw 502 drives the unloading unit to move through the slider 503. This facilitates the movement of the packaging bag to different unloading conveyor mechanisms 8 according to the detection results of the packaging bag, completing the unloading operation of the packaging bag and improving efficiency.

[0035] like Figure 1 , Figure 2 , Figure 7 As shown, the unloading unit includes a third cylinder 601, which is fixedly mounted on the slider 503. A support frame 602 is fixedly mounted on the telescopic end of the third cylinder 601, and a fourth cylinder 603 is fixedly mounted on the support frame 602. A suction cup mechanism 604 is fixedly mounted on the telescopic end of the fourth cylinder 603. The third cylinder 601, the fourth cylinder 603, and the suction cup mechanism 604 all operate using existing technology. All three are connected to an external inflation / deflation control mechanism. The third cylinder 601 drives the fourth cylinder 603 and the suction cup mechanism 604 to move via the support frame 602, adjusting the suction cup mechanism 604. The height is adjusted by the fourth cylinder 603 driving the suction cup mechanism 604 to move, adjusting the position of the suction cup mechanism 604 on the worktable 1. The suction cup mechanism 604 adheres to the packaging bag. The external inflation / deflation control mechanism uses the suction cup mechanism 604 to adsorb and fix the packaging bag. The suction cup mechanism 604 unloads the inspected packaging bag, and the slider 503 drives the third cylinder 601 to move, thus placing the inspected packaging bag onto the unloading conveyor mechanism 8. The external inflation / deflation control mechanism controls the suction cup mechanism 604 to release the adsorption and fixation of the packaging bag, and the packaging bag falls onto the unloading conveyor mechanism 8, completing the automatic unloading of the packaging bag and improving inspection efficiency.

[0036] Working principle: such as Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the packaging bag is fed by the feeding conveyor 7. The packaging bag moves to the position of the push plate 402. The push plate 402 is moved by the second cylinder 401. The push plate 402 pushes the packaging bag on the feeding conveyor 7, so that the packaging bag moves to the bottom of the vacuum hood 302, and the detection and feeding of the packaging bag is completed.

[0037] At the same time, such as Figure 6 As shown, during the process of the pusher plate 402 pushing the packaging bag to feed, the external dust collection device absorbs the debris of the packaging bag through the dust collection valve 404 and the dust collection hole 403, ensuring the cleanliness of the packaging bag surface and avoiding misjudgment caused by the release of gas by the debris in the vacuum environment.

[0038] like Figures 1-5 As shown, the first cylinder 301 moves the vacuum chamber 302 onto the worktable 1. The sealing ring 312 and sealing groove 313 improve the sealing effect between the vacuum chamber 302 and the worktable 1. An external inflation / deflation control mechanism inflates the airbag 305. The airbag 305 clamps and limits the packaging bag via the honeycomb plate 308. The first pressure sensor 310 detects the gas pressure inside the airbag 305, and the second pressure sensor 311 detects the gas pressure inside the vacuum chamber 302. The external inflation / deflation control mechanism... The vacuum valve 303 extracts the air from the vacuum chamber 302, creating a pressure difference between the inside and outside of the packaging bag, causing the packaging bag to expand. The honeycomb plate 308 then limits and compresses the packaging bag. Simultaneously, based on the gas pressure inside the vacuum chamber 302 and the airbag 305, the airbag 305 is repeatedly inflated and deflated, allowing the honeycomb plate 308 to repeatedly press the packaging bag, facilitating the opening of micro-cracks and enabling faster detection of the packaging bag's airtightness. The airtightness of the packaging bag is determined by the pressure changes of the first pressure sensor 310 and the second pressure sensor 311.

[0039] like Figure 1 , Figure 2 , Figure 5 , Figure 7 As shown, after the test is completed, the vacuum chamber 302 is raised by the first cylinder 301, and the fourth cylinder 603 and the suction cup mechanism 604 are moved by the support frame 602 to adjust the height of the suction cup mechanism 604. The position of the suction cup mechanism 604 on the worktable 1 is adjusted by the fourth cylinder 603 to move the suction cup mechanism 604. The suction cup mechanism 604 is attached to the packaging bag. The external inflation and deflation control mechanism uses the suction cup mechanism 604 to adsorb and fix the packaging bag. The fourth cylinder 603 uses the suction cup mechanism 604 to move and retract the packaging bag.

[0040] like Figure 5 , Figure 7 As shown, based on the detection results of the packaging bag, the motor 501 drives the lead screw 502 to rotate, and the lead screw 502 drives the third cylinder 601 to move through the slider 503, placing the packaging bag onto the corresponding unloading conveyor 8. The external inflation and deflation control mechanism controls the suction cup mechanism 604 to release the suction and fixation of the packaging bag, and the packaging bag falls onto the unloading conveyor 8, completing the automatic unloading of the packaging bag.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A packaging airtightness testing device, characterized in that, Includes a workbench (1), on which a feeding conveyor (7), a discharging conveyor (8), a support (2), a pushing unit and a displacement unit are fixedly installed. A detection unit is fixedly installed on the support (2). The pushing unit is close to the feeding conveyor (7), and the displacement unit is close to the discharging conveyor (8). A discharging unit is fixedly installed on the displacement unit. The detection unit includes a first cylinder (301), a mounting slot (306), and a mounting box (304). The mounting slot (306) is fixedly disposed on the upper surface of the workbench (1). The first cylinder (301) is fixedly mounted on the bracket (2). A vacuum cover (302) is fixedly mounted on the telescopic end of the first cylinder (301). A vacuum valve (303) is fixedly mounted on the upper end of the vacuum cover (302), and a sealing assembly is disposed on the lower end of the vacuum cover (302). The vacuum cover (302) is fixedly installed in the mounting box (304). Airbags (305) are fixedly installed in both the mounting box (304) and the mounting groove (306). A mounting bracket (307) is fixedly installed on the airbag (305). A honeycomb plate (308) is fixedly installed on the mounting bracket (307). Through holes (309) are arranged on the honeycomb plate (308). A pressure detection component is provided in both the mounting box (304) and the airbag (305).

2. The packaging airtightness testing device according to claim 1, characterized in that: The detection component includes a first pressure sensor (310) and a second pressure sensor (311). The first pressure sensor (310) is fixedly installed inside the airbag (305), and the second pressure sensor (311) is fixedly installed on the upper surface of the mounting box (304).

3. The packaging airtightness testing device according to claim 1, characterized in that: The sealing assembly includes a sealing ring (312) and a sealing groove (313). The sealing ring (312) is fixedly installed at the lower end of the vacuum hood (302). The sealing groove (313) is disposed on the worktable (1) and surrounds the mounting groove (306). The sealing groove (313) is located directly below the sealing ring (312).

4. The packaging airtightness testing device according to claim 1, characterized in that: The pushing unit includes a second cylinder (401), which is fixedly installed on the workbench (1). A push plate (402) is fixedly installed on the telescopic end of the second cylinder (401), and the push plate (402) is slidably connected to the feeding conveying mechanism (7).

5. The packaging airtightness testing device according to claim 4, characterized in that: The push plate (402) has dust suction holes (403) arranged on its side, and a dust suction valve (404) communicating with the dust suction holes (403) is provided on the upper surface of the push plate (402).

6. The packaging airtightness testing device according to claim 1, characterized in that: The displacement unit includes a motor (501) and a lead screw (502). The motor (501) is fixedly installed on the side of the worktable (1). The lead screw (502) is rotatably installed on the worktable (1). The lead screw (502) is located near the unloading conveying mechanism (8). The lead screw (502) is fixedly connected to the output shaft of the motor (501). A slider (503) is installed on the lead screw (502) through a threaded connection. The unloading unit is fixedly installed on the slider (503).

7. The packaging airtightness testing device according to claim 6, characterized in that: The feeding unit includes a third cylinder (601), which is fixedly mounted on the slider (503). A support frame (602) is fixedly mounted on the telescopic end of the third cylinder (601), and a fourth cylinder (603) is fixedly mounted on the support frame (602). A suction cup mechanism (604) is fixedly mounted on the telescopic end of the fourth cylinder (603).

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