Packaging cover surface detection equipment

Abstract

The invention belongs to the field of detection equipment, and particularly relates to packaging cover surface detection equipment which comprises a detection table, a conveying assembly, a placement assembly, a vertical plate, two fixing plates and two detection assemblies. The conveying assembly is connected to the upper portion of the detection table, and the packaging covers are conveyed through the conveying assembly. The placing assembly is connected to the conveying assembly, and the packaging covers can be positioned and placed through the placing assembly; the vertical plate is connected to the top of the detection table; the two fixing plates are connected to the front side of the vertical plate; the two detection assemblies are connected to the fixing plate, and the size and the number of bubbles in the packaging cover can be detected through the detection assemblies. According to the invention, the design is reasonable, through the equidistant array electrode structure, the regionalized accurate monitoring of the position, size and number of bubbles is realized, tiny bubbles and harmful bubbles can be distinguished, qualified products are prevented from being misjudged as defective products, and the resource waste is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a packaging cap surface testing device. Background Technology

[0002] The packaging lids on food packaging boxes are processed using injection molding. However, during processing, if the gas in the melt or cavity cannot be effectively discharged, or if there is insufficient material flow to replenish the melt when it cools and shrinks, air bubbles will be generated inside the molded packaging lid. When packaging lids with air bubbles of a certain size or a certain number of air bubbles are used, if the air bubbles burst and form tiny gaps, or if the air bubbles cause uneven thickness of the packaging lid, it will reduce its sealing performance. External oxygen, moisture, and microorganisms can easily penetrate, accelerating the oxidation and spoilage of the food.

[0003] Currently, the integrated industrial camera bubble detection unit, announced in Chinese Patent Publication No. CN220271190U, includes: a glass inspection platform, an industrial camera assembly, a light source assembly, a glue injection and distribution assembly, a reversing valve assembly, and a protective cover assembly. This invention can be used for single-channel glue detection, or by expanding the distribution channels, multiple sets of industrial cameras and glass inspection platforms can be used for detection in multiple distribution channels. In vacuum potting and dispensing processes, using this industrial camera bubble detection unit can provide online real-time monitoring of whether there are bubbles inside the glue, improving the accuracy and yield of vacuum potting and dispensing.

[0004] However, industrial cameras are commonly used to detect bubbles in food packaging caps. But in actual production and inspection, it has been found that industrial cameras can only detect the presence of bubbles, but cannot distinguish the size of the bubbles. As a result, all packaging caps containing bubbles are marked as defective. However, in practical applications, a small number of tiny bubbles inside food packaging caps do not affect the structural strength and sealing performance of the cap, and do not have a substantial impact on the use. Misjudging such qualified products as defective products results in a waste of resources. Therefore, we propose a packaging cap surface inspection device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a packaging cap surface inspection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A packaging cap surface inspection device includes: an inspection table, a conveying assembly, a placement assembly, a vertical plate, two fixed plates, and two inspection components. The conveying assembly is connected above the inspection table and conveys the packaging caps; the placement assembly is connected to the conveying assembly and positions the packaging caps; the vertical plate is connected to the top of the inspection table; the two fixed plates are connected to the front side of the vertical plate; and the two inspection components are respectively connected to the fixed plates, enabling the inspection of the size and number of air bubbles inside the packaging caps.

[0008] Preferably, the detection assembly includes: a push rod motor, an electrode fixing shell, an air bladder, a flexible conductive film, and electrodes. The push rod motor is connected to a corresponding fixing plate; the electrode fixing shell is connected to the output shaft of the push rod motor; the air bladder is connected to the inner wall of the electrode fixing shell; the flexible conductive film is connected to the bottom of the air bladder; and the electrodes are arranged in an evenly spaced array on the flexible conductive film.

[0009] Preferably, each of the two airbags has an airbag inflation head on its opposite side, and an inflation mechanism connected to the airbag inflation head is provided on the opposite side of the two fixed plates. The inflation mechanism includes a piston cylinder, a piston seat, a drive rod, and an inflation tube. The piston cylinder is connected to the fixed plate; the piston seat is slidably sealed inside the piston cylinder; one end of the drive rod is connected to the electrode fixing shell, and the other end extends into the corresponding piston cylinder and is connected to the piston seat; one end of the inflation tube is mounted on the piston cylinder and communicates with the piston cylinder, and the other end is connected to the airbag inflation head.

[0010] Preferably, guide sleeves are fixedly installed on the sides of the two fixed plates that are close to each other, and guide rods are slidably installed inside the guide sleeves, with one end of the guide rods fixedly installed on the corresponding electrode fixing shells.

[0011] Preferably, the conveying assembly includes: a fixed base, a rotating shaft, conveying rollers, a conveyor belt, and a servo motor. The fixed base is connected to the top of the testing table; the rotating shaft is rotatably mounted between two corresponding fixed bases; the conveying rollers are connected to the rotating shaft; the conveyor belt drive is mounted on two corresponding conveying rollers; the servo motor is connected to a corresponding fixed base, and the output shaft of the servo motor is fixedly connected to the corresponding rotating shaft.

[0012] Preferably, the placement assembly includes: a connecting hole, a rubber placement seat, a placement groove, and a detection hole. The connecting holes are evenly spaced on the conveyor belt; the rubber placement seats are connected to the conveyor belt, and multiple rubber placement seats are arranged in a one-to-one correspondence with multiple connecting holes; the placement groove is formed on the rubber placement seat; the detection hole is formed on the inner wall of the placement groove, and the detection hole communicates with the corresponding connecting hole.

[0013] Preferably, the packaging cap surface inspection equipment further includes: a controller and a display. The controller is connected to the top of the inspection table, and the servo motor and push rod motor are electrically connected to the controller. The display is connected to the top of the inspection table and is electrically connected to the controller.

[0014] The beneficial effects of this invention are:

[0015] 1. Through the equidistant array electrode structure, the location, size, and quantity of bubbles can be precisely monitored in a localized manner, which can distinguish between micro bubbles and harmful bubbles, avoid misjudging qualified products as defective products, and effectively reduce resource waste;

[0016] 2. The inflation mechanism is linked with the electrode fixing shell driven by the push rod motor, which can realize the automatic inflation and deflation of the air bag without the need for additional inflation equipment. This allows the flexible conductive film to fit tightly against the packaging cap, ensuring detection accuracy, simplifying the equipment structure, and improving operational stability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a packaging cap surface inspection device proposed in this invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the conveying component of a packaging cap surface inspection device proposed in this invention;

[0019] Figure 3 This is a schematic diagram of part A of a packaging cap surface inspection device proposed in this invention;

[0020] Figure 4 This is a bottom-view perspective view of the vertical plate, fixing plate, and detection components of a packaging cap surface inspection device proposed in this invention.

[0021] Figure 5 for Figure 4 A cross-sectional three-dimensional structural diagram;

[0022] Figure 6 This is a schematic diagram of part B of a packaging cap surface inspection device proposed in this invention.

[0023] In the diagram: 1. Detection platform; 101. Vertical plate; 102. Fixing plate; 103. Display; 2. Conveying assembly; 201. Fixing seat; 202. Rotating shaft; 203. Conveying roller; 204. Conveying belt; 205. Servo motor; 3. Placement assembly; 301. Connecting hole; 302. Rubber placement seat; 303. Placement groove; 304. Detection hole; 4. Detection assembly; 401. Push rod motor; 402. Electrode fixing shell; 403. Airbag; 404. Flexible conductive film; 405. Electrode; 501. Piston cylinder; 502. Drive rod; 503. Piston seat; 504. Inflation tube; 505. Airbag inflation head; 601. Guide sleeve; 602. Guide rod. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0025] This application discloses a packaging lid surface inspection device.

[0026] Reference Figure 1-6 A packaging cap surface inspection device includes: an inspection table 1, a conveying assembly 2, a placement assembly 3, a vertical plate 101, two fixing plates 102, and two inspection components 4. The conveying assembly 2 is connected above the inspection table 1 and conveys the packaging caps. A rejection device is externally connected to the rear end of the conveying assembly 2 to reject defective packaging caps. However, the rejection device is not covered in this solution and is therefore not described in detail. The placement assembly 3 is connected to the conveying assembly 2 and positions the packaging caps. The vertical plate 101 is welded to the top of the inspection table 1. The two fixing plates 102 are welded to the front of the vertical plate 101. The two inspection components 4 are respectively connected to the fixing plates 102 and can detect the size of air bubbles inside the packaging caps. The packaging cover is placed on the conveying component 2 by the placement component 3, and the conveying component 2 can move the packaging cover between the two detection components 4. The detection components 4 can detect the size and number of bubbles in the packaging cover, thereby further determining whether it is a good product or a defective product. More specifically, the fixing plate 102 is also equipped with a photoelectric sensor for detecting the position of the packaging cover, so that the packaging cover can be accurately stopped between the two detection components 4. The photoelectric sensor can be known and used by those skilled in the art without creative effort. The photoelectric sensor is not within the scope of protection of this solution, so it is not described in detail.

[0027] Based on the above, refer to the appendix Figure 4 , 5The detection component 4 includes: a push rod motor 401, an electrode fixing shell 402, an air bag 403, a flexible conductive film 404, and an electrode 405. The push rod motor 401 is bolted to the corresponding fixing plate 102; the electrode fixing shell 402 is detachably bolted to the output shaft of the push rod motor 401; the airbag 403 is fixedly bonded to the inner wall of the electrode fixing shell 402, and the bottom of the airbag 403 extends to the bottom of the electrode fixing shell 402; the flexible conductive film 404 is fixedly connected to the bottom of the airbag 403, and the flexible conductive film 404 is set as a flexible ITO conductive film; the electrodes 405 are evenly spaced arrayed on the flexible conductive film 404. The evenly spaced array of electrodes 405 detects the packaging cap. If there are bubbles, the corresponding area of ​​the electrode 405 outputs an abnormal signal. After receiving the signal, the controller analyzes the size and number of bubbles according to the signal distribution range and intensity. The power supply method of the electrodes 405 can be directly obtained by those skilled in the art from textbooks and technical manuals without creative effort. Therefore, the power supply method is not within the scope of protection of this solution and is not described in detail.

[0028] It should be noted that the transparent packaging cover is used as the dielectric layer of the capacitor. Parallel electrodes are arranged on the top and bottom of the workpiece. The dielectric constant of the plastic matrix is ​​much higher than that of air. When there are air bubbles inside the workpiece, the equivalent dielectric constant of the bubble area will decrease, causing the capacitance value between the electrodes 405 to change. By capturing the tiny fluctuations in capacitance with a high-precision capacitance sensor, the position and size of the air bubble can be determined.

[0029] Based on the above, and referring to Figure 6Each of the two airbags 403 is provided with an airbag inflation head 505 on the side away from each other. The airbag inflation head 505 is integrally formed with the airbag 403. The airbag 403 can be fully inflated through the airbag inflation head 505. The two fixing plates 102 are provided with an inflation mechanism connected to the airbag inflation head 505 on the side close to each other. The inflation mechanism includes: piston cylinder 501, piston seat 503, drive rod 502 and inflation tube 504. The piston cylinder 501 is bolted to the fixing plate 102; the piston seat 503 is slidably sealed inside the piston cylinder 501, and a sealing groove is provided on the outer side of the piston seat 503. A sealing ring is installed in the sealing groove, and the sealing ring is slidably sealed to the inner wall of the piston cylinder 501; one end of the drive rod 502 is bolted to the electrode fixing shell 402, and the other end extends into the corresponding piston cylinder 501 and is welded to the piston seat 503. A guide hole is provided on the inner wall of the piston cylinder 501 away from its opening, and a sealing ring is installed in the guide hole. The drive rod 502 passes through the guide hole and is slidably sealed to the corresponding sealing ring; one end of the inflation pipe 504 is installed on the piston cylinder 501 and... The piston cylinder 501 is connected to the other end, and the airbag inflation head 505 is connected to the other end. Because the middle of the packaging cover is raised, the surface of the packaging cover is not flat. The expansion amount of the airbag 403 can be precisely controlled by the stroke of the push rod motor 401. It is suitable for packaging covers with a protrusion height of ≤5mm, ensuring that the conductive film is fully attached to the cover body without any blind spots. Therefore, when the electrode fixing shell 402 pushes the piston seat 503 to slide inside the piston cylinder 501 through the drive rod 502, the gas in the piston cylinder 501 is pressed into the airbag 403 through the inflation tube 504 and the airbag inflation head 505. The airbag 403 expands and drives the flexible conductive film 404 to tightly adhere to the uneven upper and lower surfaces of the packaging cover.

[0030] Based on the above, and referring to Figure 5 Guide sleeves 601 are fixedly installed on the side of the two fixed plates 102 that are close to each other by welding. Guide rods 602 are slidably installed inside the guide sleeves 601, and one end of the guide rods 602 is fixedly installed on the corresponding electrode fixing shells 402. When the electrode fixing shells 402 move in the vertical direction, the electrode fixing shells 402 will drive the guide rods 602 to slide in the guide sleeves 601, thereby achieving the purpose of guiding and stabilizing the electrode fixing shells 402 in the vertical direction.

[0031] Based on the above, and referring to Figure 2The conveying assembly 2 includes: a fixed base 201, a rotating shaft 202, a conveying roller 203, a conveyor belt 204, and a servo motor 205. The fixed base 201 is connected to the top of the detection table 1. Four fixed bases 201 are provided and fixed to the four corners of the top of the detection table 1 by welding. The rotating shaft 202 is rotatably installed between two corresponding fixed bases 201 through bearings. The conveyor roller 203 is fixedly connected to the rotating shaft 202. The conveyor belt 204 is driven and mounted on the two corresponding conveyor rollers 203. The servo motor 205 is fixedly connected to the corresponding fixed base 201 by bolts, and the output shaft of the servo motor 205 is fixedly connected to the corresponding rotating shaft 202. The controller can control the servo motor 205 and adjust the parameters of the servo motor 205 so that the servo motor 205 can drive the conveyor belt 204 and the packaging cover to move at a set distance, and can sequentially convey the packaging cover between the two detection components 4. It should be noted that the power supply method and parameter adjustment of the controller can be directly obtained by those skilled in the art from textbooks and technical manuals without creative effort. Therefore, the power supply method and parameter adjustment are not within the scope of protection of this solution and are not described in detail.

[0032] Based on the above, and referring to Figure 3 The placement component 3 includes: a connecting hole 301, a rubber placement seat 302, a placement groove 303, and a detection hole 304. The connecting holes 301 are evenly spaced on the conveyor belt 204, allowing the lower detection mechanism to pass through the conveyor belt 204 via the connecting holes 301. The rubber placement seats 302 are fixed to the conveyor belt 204 by adhesive bonding, and multiple rubber placement seats 302 are arranged one-to-one with multiple connecting holes 301. The placement groove 303 is formed on the rubber placement seat 302. The detection hole 304 is formed on the inner wall of the placement groove 303, and the detection hole 304 is connected to the corresponding connecting hole 301. The push rod motor 401 drives the electrode fixing shell 402 to move, and the electrode fixing shell 402 can drive the electrode 405 on the flexible conductive film 404 to fit with the packaging cap, thereby detecting the packaging cap through the equally spaced array of electrodes 405. If there are air bubbles, the electrode 405 in the corresponding area outputs an abnormal signal. After receiving the signal, the controller analyzes the size and number of air bubbles according to the signal distribution range and intensity, and displays the results on the display 103.

[0033] Based on the above, and referring to Figure 1The packaging cover surface inspection equipment also includes: a controller and a display 103. The controller is detachably connected to the top of the inspection table 1 by bolts, and the servo motor 205, push rod motor 401, and electrode 405 are all electrically connected to the controller, which can transmit the detection signal to the controller; the display 103 is connected to the top of the inspection table 1 and is electrically connected to the controller. The specific circuit connection method is considered by those skilled in the art to be directly obtainable from textbooks and technical manuals and can be used without creative effort. Therefore, the circuit connection method is not within the scope of protection of this solution and is not described in detail.

[0034] The working principle of this invention is as follows: The packaging caps are placed one by one into the placement groove 303 of the rubber placement seat 302 by the transfer device. The servo motor 205 is started by the controller to drive the rotating shaft 202 to rotate. The output shaft of the servo motor 205 can drive the conveyor roller 203 and the conveyor belt 204 to rotate. The conveyor belt 204 can transport the packaging caps in the rubber placement seat 302 to the two detection components 4. When the packaging cap reaches the detection position, the servo motor 205 stops, the push rod motor 401 starts, and pushes the electrode fixing shell 402 to move towards the packaging cap. The guide rod 602 slides along the guide sleeve 601 to ensure that the electrode fixing shell 402 moves smoothly.

[0035] When the electrode fixing shell 402 moves, the electrode fixing shell 402 pushes the piston seat 503 to slide inside the piston cylinder 501 through the drive rod 502, and the gas in the piston cylinder 501 is pressed into the air bag 403 through the inflation tube 504 and the air bag inflation head 505. The air bag 403 expands and drives the flexible conductive film 404 to tightly adhere to the uneven upper and lower surfaces of the packaging cap. At this time, the equally spaced array of electrodes 405 detects the packaging cap. If there are air bubbles, the corresponding area of ​​the electrode 405 outputs an abnormal signal. After receiving the signal, the controller analyzes the size and number of air bubbles according to the signal distribution range and intensity, and displays the results on the display 103.

[0036] If the size of the bubbles is larger than the set value or the number is greater than the set value, it is marked as a defective product; if it meets the requirements, it is judged as a qualified product. The rejection device connected to the rear end of the conveying component 2 can reject defective products. After the inspection is completed, the push rod motor 401 is reset, the electrode fixing shell 402 drives the drive rod 502 and the piston seat 503 to move in opposite directions, the air bag 403 is deflated, the flexible conductive film 404 is removed from the packaging cover, the servo motor 205 restarts, and the packaging cover that has been inspected is conveyed to the next process. At the same time, the packaging cover to be inspected is conveyed to the inspection position, and the inspection operation is carried out in a cycle.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A packaging cap surface inspection device, characterized in that, include: Testing station (1); A conveying assembly (2) is connected above the testing station (1) and conveys the packaging cap through the conveying assembly (2); The placement component (3) is connected to the conveying component (2), and the packaging lid can be positioned and placed by the placement component (3); A vertical plate (101) is connected to the top of the detection table (1); Two fixing plates (102) are connected to the front side of the vertical plate (101); Two detection components (4) are respectively connected to the fixed plate (102). The size and number of bubbles inside the packaging lid can be detected by the detection components (4).

2. The packaging cap surface inspection device according to claim 1, characterized in that, The detection component (4) includes: A push rod motor (401) is connected to the corresponding fixed plate (102); An electrode fixing housing (402) is connected to the output shaft of the push rod motor (401); An airbag (403) is attached to the inner wall of the electrode fixing shell (402); A flexible conductive film (404) is attached to the bottom of the airbag (403); Electrodes (405) are arrayed at equal intervals on a flexible conductive film (404).

3. The packaging cap surface inspection device according to claim 2, characterized in that, Each of the two airbags (403) is provided with an airbag inflation head (505) on the side away from each other, and an inflation mechanism connected to the airbag inflation head (505) is provided on the side of the two fixing plates (102) that are close to each other.

4. The packaging cap surface inspection device according to claim 3, characterized in that, The inflation mechanism includes: Piston cylinder (501) is connected to fixed plate (102); The piston seat (503) is slidably sealed inside the piston cylinder (501); The drive rod (502) is connected at one end to the electrode fixing shell (402) and at the other end extends into the corresponding piston cylinder (501) and is connected to the piston seat (503); The inflation tube (504) is installed on the piston cylinder (501) at one end and connected to the piston cylinder (501), and the other end is connected to the airbag inflation head (505).

5. The packaging cap surface inspection device according to claim 4, characterized in that, Guide sleeves (601) are fixedly installed on the side of the two fixed plates (102) that are close to each other. Guide rods (602) are slidably installed inside the guide sleeves (601), and one end of the guide rods (602) is fixedly installed on the corresponding electrode fixing shells (402).

6. The packaging cap surface inspection device according to claim 5, characterized in that, The conveying assembly (2) includes: The mounting base (201) is connected to the top of the testing station (1); The rotating shaft (202) is rotatably mounted between two corresponding fixed seats (201); The conveyor roller (203) is connected to the rotating shaft (202); The conveyor belt (204) is fitted with a drive unit on two corresponding conveyor rollers (203); A servo motor (205) is connected to a corresponding fixed base (201), and the output shaft of the servo motor (205) is fixedly connected to the corresponding rotating shaft (202).

7. The packaging cap surface inspection device according to claim 6, characterized in that, The placement component (3) includes: Connecting holes (301) are equally spaced on the conveyor belt (204); A rubber placement seat (302) is connected to the conveyor belt (204), and multiple rubber placement seats (302) are provided in a one-to-one correspondence with multiple connecting holes (301); A placement slot (303) is provided on a rubber placement seat (302); The detection hole (304) is opened on the inner wall of the placement groove (303), and the detection hole (304) is connected to the corresponding connecting hole (301).

8. The packaging cap surface inspection device according to claim 7, characterized in that, Also includes: The controller is connected to the top of the testing station (1), and the servo motor (205) and the push rod motor (401) are electrically connected to the controller; The display (103) is connected to the top of the detection station (1) and is electrically connected to the controller.

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