An inspection apparatus for detecting defects in bottle caps

Abstract

The utility model discloses a detection device for detecting the defect of bottle cap, including conveying mechanism, including first vacuum adsorption conveyer and second vacuum adsorption conveyer, cap inner detection mechanism, including setting in first image acquisition subassembly and ranging sensor, first image acquisition subassembly is used for shooting the opening end of the bottle cap of measurement, and ranging sensor is used for detecting the gasket in bottle cap, cap outer detection mechanism, including second image acquisition subassembly and third image acquisition subassembly, second image acquisition subassembly is used for detecting the outside of bottle cap, and third image acquisition subassembly is used for shooting the side of the bottle cap of measurement and opening end, and first rejection mechanism and second rejection mechanism for rejecting unqualified bottle cap, the utility model discloses can detect the dirt and defect of cap inner and cap outer of bottle cap, and the gasket number in bottle cap is detected simultaneously, and the detection efficiency and detection comprehensiveness are improved.

Description

Technical Field

[0001] This utility model relates to the field of bottle cap inspection technology, and in particular to a detection device for detecting defects in bottle caps. Background Technology

[0002] During the production of bottle caps, various defects such as deformation, burrs, color difference, dirt, and missing inner gaskets often occur due to various reasons. Therefore, it is necessary to detect these defective products before they are put into storage in order to ensure product quality and prevent defective bottle caps from flowing out.

[0003] Currently, most companies still use manual visual inspection for testing. However, manual inspection suffers from low efficiency, high workload, high error rate, and poor reliability. Some companies use bottle cap inspection equipment, but existing equipment can only detect external defects in bottle caps and cannot perform comprehensive inspection of both the exterior and interior of the bottle cap. It is also not convenient to check whether the number of inner gaskets inside the bottle cap is up to standard. If too many or too few inner gaskets are placed inside the bottle cap, it will still result in the bottle cap being unqualified, affecting the quality of the product. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a detection device for detecting bottle cap defects, which can detect dirt and defects inside and outside the bottle cap, and at the same time facilitate the detection of the number of gaskets inside the bottle cap, thereby improving detection efficiency.

[0005] This utility model provides a detection device for detecting defects in bottle caps, comprising: The conveying mechanism includes a first vacuum adsorption conveyor belt and a second vacuum adsorption conveyor belt. One end of the first vacuum adsorption conveyor belt is connected to an external bottle cap sorting machine. The top of the first vacuum adsorption conveyor belt is used to adsorb and convey the bottle caps to be tested. The second vacuum adsorption conveyor belt is arranged along its length direction directly above the other end of the first vacuum adsorption conveyor belt. The bottom of the second vacuum adsorption conveyor belt is used to adsorb and convey the bottle caps to be tested. The opening of the bottle caps to be tested is facing upward. The cap detection mechanism includes a first image acquisition component and a distance sensor positioned directly above the first vacuum adsorption conveyor belt. The first image acquisition component is used to capture images of the open end of the cap to be tested, and the distance sensor is used to detect the height of the gasket inside the cap to be tested. The outer cap inspection mechanism includes a second image acquisition component and a third image acquisition component. The second image acquisition component is disposed on both sides of the second vacuum adsorption conveyor belt and is used to photograph the outer surface of the cap to be tested. The third image acquisition component is disposed directly below the second vacuum adsorption conveyor belt and is used to photograph the side of the cap to be tested away from the opening end. The first rejection mechanism is used to reject bottle caps that fail the internal inspection. The second rejection mechanism is used to reject bottle caps that fail the external inspection. The inner cover detection mechanism, the first rejection mechanism, the outer cover detection mechanism, and the second rejection mechanism are arranged sequentially along the conveying direction of the conveying mechanism.

[0006] Furthermore, both sides of the first vacuum adsorption conveyor belt and the second vacuum adsorption conveyor belt are provided with guide rails that limit the running path of the bottle cap.

[0007] Furthermore, both the first vacuum adsorption conveyor belt and the second vacuum adsorption conveyor belt are provided with a plurality of adsorption holes.

[0008] Furthermore, the first rejection mechanism is located on one side of the first vacuum adsorption conveyor belt, and a first recycling box is located on the other side of the first vacuum adsorption conveyor belt opposite the first rejection mechanism. The second rejection mechanism is located on one side of the second vacuum adsorption conveyor belt, and a second recycling box is located on the other side of the second vacuum adsorption conveyor belt, directly opposite the second rejection mechanism.

[0009] Furthermore, both the first rejection mechanism and the second rejection mechanism include a cylinder and a solenoid valve for controlling the extension and retraction of the cylinder.

[0010] Furthermore, it also includes a controller, and the solenoid valves of the first rejection mechanism and the second rejection mechanism, the first image acquisition component, the ranging sensor, the second image acquisition component and the third image acquisition component are all electrically connected to the controller.

[0011] Furthermore, it also includes a housing, and the conveying mechanism is disposed within the housing.

[0012] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model transports the bottle cap to be tested through a first vacuum adsorption conveyor belt and a second vacuum adsorption conveyor belt, with the opening of the bottle cap facing upwards. The detection mechanism inside the cap is located directly above the first vacuum adsorption conveyor belt. The first image acquisition component in the detection mechanism inside the cap takes pictures of the inside of the bottle cap to detect dirt inside the cap. The distance sensor in the detection mechanism inside the cap detects the gasket inside the bottle cap. The bottle cap to be tested is transported and adsorbed to the bottom of the second vacuum adsorption conveyor belt under the adsorption action. The second image acquisition component in the detection mechanism outside the cap takes pictures of the outer surface of the bottle cap around the perimeter. The third image acquisition component takes pictures of the bottom of the bottle cap to detect dirt and defects on the outer surface of the bottle cap. This application can detect dirt inside the bottle cap, dirt outside the bottle cap, and the amount of gaskets, realizing comprehensive detection of the bottle cap to be tested, improving the comprehensiveness of detection, and preventing defective products from flowing out. (2) This utility model can automatically realize the bottle cap detection process. Compared with manual inspection, this application greatly reduces the labor intensity of workers, improves detection efficiency, and has better detection reliability.

[0013] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a top view of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention (the first and second recycling bins are omitted). The following are the labels in the diagram: 1. First vacuum adsorption conveyor belt; 2. Second vacuum adsorption conveyor belt; 3. First image acquisition component; 4. Distance sensor; 5. Second image acquisition component; 6. Third image acquisition component; 7. First rejection mechanism; 8. Second rejection mechanism; 9. Vacuum tube; 10. Vacuum pumping device; 11. First recycling bin; 12. Second recycling bin; 13. Guide rail; 14. Box body. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] Please refer to Figures 1-2 An embodiment of this utility model provides a detection device for detecting defects in bottle caps, comprising: The conveying mechanism includes a first vacuum adsorption conveyor belt 1 and a second vacuum adsorption conveyor belt 2. One end of the first vacuum adsorption conveyor belt 1 is connected to an external bottle cap sorting machine. The top of the first vacuum adsorption conveyor belt 1 is used to adsorb and convey the bottle caps to be tested. The second vacuum adsorption conveyor belt 2 is arranged along its length direction directly above the other end of the first vacuum adsorption conveyor belt 1. The bottom of the second vacuum adsorption conveyor belt 2 is used to adsorb and convey the bottle caps to be tested. The opening of the bottle caps to be tested is facing upward. The cap detection mechanism includes a first image acquisition component 3 and a distance sensor 4, which are located directly above the first vacuum adsorption conveyor belt 1. The first image acquisition component 3 is used to take pictures of the open end of the cap to be tested, and the distance sensor 4 is used to detect the height of the gasket inside the cap to be tested. The outer cap inspection mechanism includes a second image acquisition component 5 and a third image acquisition component 6. The second image acquisition component 5 is set on both sides of the second vacuum adsorption conveyor belt 2 and is used to take pictures of the outer surface of the bottle cap to be tested. The third image acquisition component 6 is set directly below the second vacuum adsorption conveyor belt 2 and is used to take pictures of the side of the bottle cap to be tested away from the opening end. The first rejection mechanism 7 is used to reject bottle caps that fail the internal inspection. The second rejection mechanism 8 is used to reject bottle caps that fail the external inspection. The inner cover inspection mechanism, the first rejection mechanism 7, the outer cover inspection mechanism, and the second rejection mechanism 8 are arranged sequentially along the conveying direction of the conveying mechanism.

[0018] In this embodiment, the bottle cap sorting machine includes a storage bin, a cap feeding machine, and a cap output track. One end of the first vacuum adsorption conveyor belt 1 is connected to the cap output track of the sorting machine. After being processed by the sorting machine, the bottle caps to be tested are arranged in a row with their openings facing upwards. Multiple bottle caps to be tested are arranged at equal intervals and conveyed to the top surface of the first vacuum adsorption conveyor belt 1 via the cap output track. The adsorption force of the second vacuum adsorption conveyor belt 2 is greater than that of the first vacuum adsorption conveyor belt 1. When the bottle caps to be tested are conveyed to the end of the first vacuum adsorption conveyor belt 1, the second vacuum adsorption conveyor belt 2 adsorbs the bottle caps to be tested, so that the top opening of the bottle caps to be tested is in contact with the bottom surface of the second vacuum adsorption conveyor belt 2, causing the bottom of the bottle caps to be tested to leak out downwards, which facilitates the external inspection of the bottle caps to be tested and improves the comprehensiveness of the inspection. In addition, the bottle caps can be adsorbed during the conveying process, which can effectively prevent the bottle caps to be tested from slipping during the inspection process.

[0019] Specifically, the first image acquisition component 3 uses two industrial cameras, which are mounted above the first vacuum adsorption conveyor belt 1 via a bracket. The first image acquisition component 3 can capture images of the open end of the bottle cap under test, obtaining image information of the inside of the cap. This information is used to detect whether the inside of the cap is dirty, whether the inner gasket is rolled, whether the gasket is wrinkled, or whether the gasket is installed backwards. The distance sensor 4 is mounted above the first vacuum adsorption conveyor belt 1 via a bracket. The distance sensor 4 can detect the distance from the inner gasket of the bottle cap passing below it to the distance sensor 4. If the distance is too large, it indicates that there is no gasket inside the bottle cap, and the product is unqualified. If the distance is within the error range, it indicates that there is a single-layer gasket inside the bottle cap, and the product is qualified. If the distance is too small, it indicates that... The first image acquisition component 1 shows that the bottle cap under test has double gaskets inside, indicating that the product is unqualified. This component is used to detect whether the number of gaskets inside the bottle cap is up to standard. The second image acquisition component 2 includes four industrial cameras, which are symmetrically arranged in pairs on both sides of the second vacuum adsorption conveyor belt 2. These cameras are used to take 360° pictures of the outer periphery of the bottle caps passing through this area. This is used to detect whether there is dirt, black spots, burrs, or whether the patterns on the outside of the cap are up to standard. The third image acquisition component 3 includes an industrial camera, which is set directly below the second vacuum adsorption conveyor belt 2 by a bracket. This camera takes pictures of the side of the bottle caps under test that is away from the opening end as they pass above it. This is used to detect whether there is dirt or defects on the bottom of the bottle caps under test. This application, through the first image acquisition component 3, the distance sensor 4, the second image acquisition component 5, and the third image acquisition component 6, can detect the dirt inside and outside of the bottle cap, as well as the amount of gasket, achieving comprehensive inspection of the bottle cap, improving the comprehensiveness of the inspection, and preventing defective products from flowing out. Moreover, this application can automatically realize the bottle cap inspection process. Compared with manual inspection, this application greatly reduces the workload of workers, improves the inspection efficiency, and has better inspection reliability.

[0020] It should be noted that the ranging sensor 4 can be a laser displacement sensor, and there is no limitation.

[0021] In a preferred embodiment, such as Figure 1 As shown, guide rails 13 that limit the running path of bottle caps are provided on both sides of the first vacuum adsorption conveyor belt 1 and the second vacuum adsorption conveyor belt 2.

[0022] In this embodiment, there are two sets of guide rails 13, both of which are linear guide rails, which are fixedly installed on both sides of the first vacuum adsorption conveyor belt 1 and the second vacuum adsorption conveyor belt 2, respectively, to guide the bottle caps to be tested to be arranged in a row during the test, so as to avoid multiple bottle caps passing through the inner or outer detection mechanism at the same time, thus avoiding affecting the test process.

[0023] In a preferred embodiment, such as Figure 1 As shown, both the first vacuum adsorption conveyor belt 1 and the second vacuum adsorption conveyor belt 2 have several adsorption holes.

[0024] In this embodiment, both the first vacuum adsorption conveyor belt 1 and the second vacuum adsorption conveyor belt 2 are existing technologies and belong to vacuum adsorption conveyors. Both include a supporting conveying device, a vacuum tube 9, and a vacuum pumping device 10. The supporting conveying device is used to support the first vacuum adsorption conveyor belt 1 or the second vacuum adsorption conveyor belt 2. A vacuum cavity is formed between the first vacuum adsorption conveyor belt 1 and the supporting conveying component connected to it. The vacuum cavity is connected to the vacuum pumping device 10 through the vacuum tube 9. The vacuum pumping device 10 is a vacuum pump. By pumping air outward, a negative pressure cavity is formed in the vacuum cavity. The bottle cap to be tested is adsorbed on the top of the first vacuum adsorption conveyor belt 1 under the action of negative pressure. Similarly, the second vacuum adsorption conveyor belt 2 also adopts a vacuum pumping method to achieve negative pressure adsorption. The bottle cap to be tested is adsorbed on the bottom of the second vacuum adsorption conveyor belt 2 under the action of negative pressure. It should be noted that the negative pressure adsorption in the first vacuum adsorption conveyor belt 1 is only set at the front end and middle of the device. The part of the first vacuum adsorption conveyor belt 1 located directly below the second vacuum adsorption conveyor belt 2 (i.e., the end) is not equipped with negative pressure adsorption, so that the bottle cap to be tested is adsorbed to the bottom of the second vacuum adsorption conveyor belt 2. In addition, there are two vacuum pumps 9, so that the negative pressure suction in the second vacuum adsorption conveyor belt 2 is greater than the negative pressure suction in the first vacuum adsorption conveyor belt 1. When the bottle cap to be tested is conveyed to the end of the first vacuum adsorption conveyor belt 1, the second vacuum adsorption conveyor belt 2 adsorbs the bottle cap to be tested to its bottom.

[0025] In a preferred embodiment, such as Figure 1 As shown, the first rejection mechanism 7 is located on one side of the first vacuum adsorption conveyor belt 3, and the first recycling box 11 is located on the other side of the first vacuum adsorption conveyor belt 1 opposite to the first rejection mechanism 7. The second rejection mechanism 8 is located on one side of the second vacuum adsorption conveyor belt 2, and the second recycling box 12 is located on the other side of the second vacuum adsorption conveyor belt 2 opposite to the second rejection mechanism 8.

[0026] In this embodiment, when the internal structure of the bottle cap to be tested is found to be unqualified, such as dirt, missing gaskets, or excessive gaskets inside the cap, the first rejection mechanism 7 can reject the unqualified bottle cap and push it into the first recycling bin 11. When the external surface of the bottle cap to be tested is found to be unqualified, such as dirt, black spots, burrs, or rough edges on the external surface and bottom of the bottle cap, the second rejection mechanism 8 can reject the unqualified bottle cap and push it into the second recycling bin 12. This facilitates the rejection and recycling of unqualified bottle caps, avoids manual rejection, reduces labor costs, and improves testing efficiency. Qualified bottle caps continue to be conveyed along the conveying mechanism and flow into the collection bin located below the other end of the second vacuum adsorption conveyor belt 2.

[0027] In a preferred embodiment, such as Figure 1 As shown, both the first rejection mechanism 7 and the second rejection mechanism 8 include a cylinder and a solenoid valve for controlling the extension and retraction of the cylinder.

[0028] Preferably, the system also includes a controller, and the solenoid valves of the first rejection mechanism 7 and the second rejection mechanism 8, the first image acquisition component 3, the ranging sensor 4, the second image acquisition component 5, and the third image acquisition component 6 are all electrically connected to the controller.

[0029] In this embodiment, a PLC controller is selected as the controller. The PLC controller has a preset distance value from the inner gasket of the bottle cap to be tested to the distance sensor 4. The distance sensor 4 transmits the measured value to the PLC controller. The PLC compares the measured value with the preset value. If the measured value is within the error range of the preset value, it means that there is a single-layer gasket inside the bottle cap and the product is qualified. If the measured value is greater than the maximum error of the preset value, it means that there is no gasket inside the bottle cap and the product is unqualified. If the measured value is less than the minimum error of the preset value, it means that there is a double gasket inside the bottle cap and the product is unqualified. The PLC controller will control the first rejection mechanism 7 to remove the unqualified bottle cap. This application also includes an industrial control computer (PC). The first image acquisition component 3, the second image acquisition component 5, and the third image acquisition component 6 upload the acquired image information to the software on the industrial control computer for analysis and transmit the detection results to the PLC controller. If the bottle cap to be tested is unqualified, the PLC controller controls the corresponding first rejection mechanism 7 or second rejection mechanism 8 to remove the unqualified bottle cap.

[0030] In a preferred embodiment, such as Figure 1 As shown, it also includes a housing 14, and the conveying mechanism is disposed inside the housing 14. Specifically, the housing 14 serves as a dustproof unit, and openings are provided at both ends of the housing 14 to connect the conveying mechanism to external installations and to allow the bottle caps to be tested to enter and exit.

[0031] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A detection device for detecting defects in bottle caps, characterized in that, include: The conveying mechanism includes a first vacuum adsorption conveyor belt (1) and a second vacuum adsorption conveyor belt (2). One end of the first vacuum adsorption conveyor belt (1) is connected to an external bottle cap sorting machine. The top of the first vacuum adsorption conveyor belt (1) is used to adsorb and convey the bottle cap to be tested. The second vacuum adsorption conveyor belt (2) is arranged directly above the other end of the first vacuum adsorption conveyor belt (1) along its length direction. The bottom of the second vacuum adsorption conveyor belt (2) is used to adsorb and convey the bottle cap to be tested. The opening of the bottle cap to be tested is facing upward. The cap detection mechanism includes a first image acquisition component (3) and a distance sensor (4) located directly above the first vacuum adsorption conveyor belt (1). The first image acquisition component (3) is used to take pictures of the open end of the cap to be tested, and the distance sensor (4) is used to detect the height of the gasket inside the cap to be tested. The outer cap inspection mechanism includes a second image acquisition component (5) and a third image acquisition component (6). The second image acquisition component (5) is located on both sides of the second vacuum adsorption conveyor belt (2) and is used to photograph the outer surface of the cap to be tested. The third image acquisition component (6) is located directly below the second vacuum adsorption conveyor belt (2) and is used to photograph the side of the cap to be tested away from the opening end. The first rejection mechanism (7) is used to reject bottle caps that fail the internal inspection. The second rejection mechanism (8) is used to reject bottle caps that fail the external inspection. The inner cover detection mechanism, the first rejection mechanism (7), the outer cover detection mechanism, and the second rejection mechanism (8) are arranged sequentially along the conveying direction of the conveying mechanism.

2. The detection device for detecting defects in bottle caps according to claim 1, characterized in that, Both sides of the first vacuum adsorption conveyor belt (1) and the second vacuum adsorption conveyor belt (2) are provided with guide rails (13) that limit the running path of the bottle cap.

3. The detection device for detecting defects in bottle caps according to claim 1, characterized in that, Both the first vacuum adsorption conveyor belt (1) and the second vacuum adsorption conveyor belt (2) are provided with a number of adsorption holes.

4. The detection device for detecting defects in bottle caps according to claim 1, characterized in that, The first rejection mechanism (7) is located on one side of the first vacuum adsorption conveyor belt (1), and the other side of the first vacuum adsorption conveyor belt (1) is provided with a first recycling box (11) facing the first rejection mechanism (7). The second rejection mechanism (8) is located on one side of the second vacuum adsorption conveyor belt (2), and the other side of the second vacuum adsorption conveyor belt (2) is provided with a second recycling box (12) facing the second rejection mechanism (8).

5. The detection device for detecting bottle cap defects according to claim 4, characterized in that, Both the first rejection mechanism (7) and the second rejection mechanism (8) include a cylinder and a solenoid valve for controlling the extension and retraction of the cylinder.

6. The detection device for detecting bottle cap defects according to claim 5, characterized in that, It also includes a controller, and the solenoid valves of the first rejection mechanism (7) and the second rejection mechanism (8), the first image acquisition component (3), the ranging sensor (4), the second image acquisition component (5) and the third image acquisition component (6) are all electrically connected to the controller.

7. The detection device for detecting defects in bottle caps according to claim 1, characterized in that, It also includes a housing (14), and the conveying mechanism is disposed inside the housing (14).

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