An automatic visual detection device for bottle cap defects

Abstract

The application belongs to the technical field of visual detection, and particularly relates to a bottle cap defect automatic visual detection device which comprises a host and a detection assembly. A supporting seat is fixedly connected to the surface of the host. The detection assembly comprises a bearing piece, a driving seat, a visual sensor one and a stirring roller. The driving seat is arranged above the bearing piece. A mounting frame is fixedly connected to one side of the driving seat. The visual sensor one is fixedly connected to the bottom of the mounting frame. A mounting block is arranged on the other side of the bearing piece. The stirring roller is rotatably connected to the bottom of the mounting block. The rotation of the stirring roller is controlled by a motor one. The bottle cap is rotated by the friction between the stirring roller and the bottle cap. The visual sensor one can continuously shoot the bottle cap during the rotation of the bottle cap. The whole circumferential surface image of the bottle cap can be collected without blind area and full coverage by a single visual sensor.

Description

Technical Field

[0001] This invention belongs to the field of visual inspection technology, specifically an automatic visual inspection device for bottle cap defects. Background Technology

[0002] In the packaging industry, bottle caps are a crucial component for sealing containers, and their quality directly impacts product safety and user experience. Traditional quality inspection relies primarily on manual visual inspection, which suffers from low efficiency, poor consistency, and fatigue. With the maturity of machine vision and automation technologies, automated inspection devices based on vision sensors have become an important direction for industry upgrades. These devices typically capture images of bottle caps using industrial cameras, and then analyze them using image processing algorithms to identify surface scratches, stains, printing defects, structural deformations, or cracks, etc.

[0003] Chinese patent application CN103604808B discloses a visual inspection method for bottle cap defects. The key technical points are: a conveyor belt carrying bottle caps; when a bottle cap passes a photoelectric sensor, the sensor sends a signal to an I / O control card, which records the encoder's code value. This code value is then used to identify the bottle cap. The distance between the photoelectric sensor's detection position and the industrial camera's image capture position determines the encoder's rotation value at the image capture position, and the distance between the photoelectric sensor and the rejection position determines the code value at the rejection position. The bottle cap image captured by the industrial camera is sent to an industrial control computer for image inspection. If the inspection is successful, the code value recorded when the bottle cap passes the photoelectric sensor is stored in a linked list. At the rejection position, unqualified bottle caps without a code value in the linked list are rejected.

[0004] However, the above-mentioned technologies often have the following drawbacks: Since the relative position between the vision camera and the bottle cap is fixed, it cannot rotate or shift relative to each other, which means that it can only acquire a visual image of the bottle cap from a single perspective, and cannot fully cover the key areas of the bottle cap, resulting in blind spots that are difficult to eliminate. At the same time, for three-dimensional deformation defects such as indentations and warping, as well as printed patterns that require 360-degree inspection, the single two-dimensional perspective also lacks effective identification and evaluation methods. In order to pursue comprehensiveness, it is often necessary to introduce multiple camera stations or manual intervention, which increases the complexity and cost of the system and reduces the inspection efficiency and overall flexibility.

[0005] Therefore, the present invention provides an automatic visual inspection device for bottle cap defects. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an automatic visual inspection device for bottle cap defects, comprising a main unit and an inspection component;

[0008] A support base is fixedly connected to the surface of the main unit; the main unit is used to control the detection component to detect the bottle cap.

[0009] The detection component is mounted on the upper side of the support base and detects bottle cap defects using visual technology; the detection component includes a receiving part, a drive base, a vision sensor, and a roller.

[0010] The receiving component is fixedly connected to the surface of the support base; a drive base is provided above the receiving component; a mounting bracket is fixedly connected to one side of the drive base; a vision sensor is fixedly connected to the bottom of the mounting bracket; a mounting block is provided on the other side of the receiving component; a roller is rotatably connected to the bottom of the mounting block; the roller is driven and controlled by a motor.

[0011] Preferably, a mounting rod is fixedly connected inside the receiving component; a second vision sensor is fixedly connected to the top of the mounting rod.

[0012] Preferably, an electric cylinder is connected between the drive base and the mounting block.

[0013] Preferably, a pressure block is rotatably connected to the bottom of the drive seat; a suction cup is fixedly connected to the bottom of the pressure block.

[0014] Preferably, a support plate is fixedly connected to the surface of the main unit; an electric cylinder is connected between the support plate and the drive seat; the receiving part is a hollow bottle model, and the top of the receiving part is provided with threads for mating with the bottle cap.

[0015] Preferably, an air nozzle and a differential pressure sensor are provided on the upper side of the support base at a position inside the receiving component; an air source device is provided inside the main unit; the air source device and the air nozzle are connected by pipelines and valves.

[0016] Preferably, a sealing plate is fixedly connected to the top of the mounting rod; the sealing plate is sealed and fitted to the inner wall of the receiving component; a guide hole is provided inside the sealing plate; and a solenoid valve is provided inside the guide hole.

[0017] Preferably, a retaining ring is fixedly connected to the outer top of the receiving component; a toothed ring is rotatably connected to the surface of the receiving component below the retaining ring; a gear is meshed with the lower side of the toothed ring; the gear is controlled by a second motor; a storage box is fixedly connected to the surface of the toothed ring; an injection cylinder is fixedly connected to the top of the storage box; and a brush is fixedly connected to one end of the injection cylinder near the retaining ring.

[0018] Preferably, a pumping cylinder is fixedly connected inside the storage box at a position corresponding to the retaining ring; a reciprocating block is slidably and sealed inside the pumping cylinder; a spring is fixedly connected between the reciprocating block and the pumping cylinder; the pumping cylinder is connected to an input pipe and an output pipe; the input pipe extends to the bottom of the storage box, and the output pipe is connected to the injection cylinder; a one-way valve is provided inside both the input pipe and the output pipe; a set of magnetic blocks are evenly distributed around the circumference of the retaining ring surface.

[0019] Preferably, an elastic sleeve is provided on the outer side of the brush root; an elastic rope is fixedly connected between the elastic sleeve and the reciprocating block.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. The automatic visual inspection device for bottle cap defects of the present invention places the bottle cap on the top surface of the receiving component with the opening of the bottle cap facing downward, so that the bottle cap is located between the receiving component and the drive seat, and the bottle cap and the roller are in contact with each other. At this time, a vision sensor is aligned with the circumferential surface of the bottle cap. Then, the roller is rotated by a motor, and the friction between the roller and the bottle cap is used to drive the bottle cap to rotate. During the rotation of the bottle cap, the vision sensor can continuously take pictures of it. The entire circumferential surface of the bottle cap can be captured without blind spots and with full coverage by a single vision sensor.

[0022] 2. The automatic visual inspection device for bottle cap defects described in this invention has a second visual sensor whose camera faces the bottle cap above it. The second visual sensor can capture and collect images of the inner side of the end face of the bottle cap to analyze its end face defects. By using the two visual sensors in combination, the end face and circumferential surface of the bottle cap can be detected simultaneously, further improving the comprehensiveness and reliability of bottle cap defect identification.

[0023] 3. The automatic visual inspection device for bottle cap defects described in this invention uses a receiving component to simulate a real bottle model. As the bottle cap is screwed onto the bottle, it slightly expands, causing defects in the bottle cap to be fully exposed. In particular, cracks in the bottle cap will increase in size after being attached to the bottle, making the defects more obvious and easier to detect. Therefore, this device can fully detect some flaws that are difficult to identify under normal bottle cap conditions by using a visual sensor while screwing the bottle cap onto the bottle, thus improving the defect capture efficiency of the visual sensor. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a schematic diagram of the detection component in this invention;

[0027] Figure 3 This is a schematic diagram of the structure of the receiving component in this invention;

[0028] Figure 4 This is a schematic diagram of the drive seat in this invention (the bottle cap and the receiving part are not connected in the diagram).

[0029] Figure 5 This is a schematic diagram of the retaining ring in this invention;

[0030] Figure 6 This is a cross-sectional view of the receiving component in this invention (the bottle cap and the receiving component are already joined in the figure).

[0031] Figure 7 yes Figure 6 Enlarged view of a portion of point A in the middle;

[0032] Figure 8 yes Figure 6 Enlarged view of a section at point B in the middle;

[0033] Figure 9 yes Figure 8 Enlarged view of a section at point C.

[0034] In the diagram: 1. Main unit; 2. Support base; 3. Bottle cap; 4. Receiving component; 5. Drive base; 6. Vision sensor 1; 7. Roller; 8. Mounting bracket; 9. Mounting block; 10. Motor 1; 11. Mounting rod; 12. Vision sensor 2; 13. Electric cylinder 1; 14. Pressure block; 15. Suction cup; 16. Support plate; 17. Electric cylinder 2; 18. Air nozzle; 19. Differential pressure sensor; 20. Sealing plate; 21. Guide hole; 22. Solenoid valve; 23. Retaining ring; 24. Gear ring; 25. Motor 2; 26. Storage box; 27. Liquid injection cylinder; 28. Brush; 29. ​​Pumping cylinder; 30. Reciprocating block; 31. Spring; 32. Input pipe; 33. Output pipe; 34. Magnetic block; 35. Elastic sleeve; 36. Elastic rope; 37. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] like Figures 1 to 9 As shown, the automatic visual inspection device for bottle cap defects of the present invention includes a host 1 and an inspection component;

[0037] A support base 2 is fixedly connected to the surface of the host 1; the host 1 is used to control the detection component to detect the bottle cap 3.

[0038] The detection component is mounted on the upper side of the support base 2 and detects defects in the bottle cap 3 using visual technology; the detection component includes a receiving part 4, a drive base 5, a vision sensor 6, and a roller 7.

[0039] The vision sensor 6 acquires images of the bottle cap 3 through a vision camera and applies image processing algorithms to detect surface irregularities, cracks, or other anomalies. This method identifies and locates defects and is a mature and conventional approach in the field, which will not be elaborated further here.

[0040] The receiving component 4 is fixedly connected to the surface of the support base 2; a drive base 5 is provided above the receiving component 4; a mounting bracket 8 is fixedly connected to one side of the drive base 5; a vision sensor 6 is fixedly connected to the bottom of the mounting bracket 8; a mounting block 9 is provided on the other side of the receiving component 4; a roller 7 is rotatably connected to the bottom of the mounting block 9; the roller 7 is driven and controlled by a motor 10.

[0041] In existing bottle cap 3 visual inspection devices, the relative position between the visual camera and the bottle cap 3 is fixed, and relative rotation or displacement is not possible. As a result, it can only acquire visual images of the bottle cap 3 from a single perspective, which cannot fully cover the key areas of the bottle cap 3. This creates blind spots that are difficult to eliminate. At the same time, for three-dimensional deformation defects such as indentations and warping, as well as printed patterns that require 360-degree inspection, the single two-dimensional perspective lacks effective identification and evaluation methods. In pursuit of comprehensiveness, it is often necessary to introduce multiple camera stations or manual intervention, which increases the complexity and cost of the system and reduces the inspection efficiency and overall flexibility.

[0042] In use, the bottle cap 3 is placed on the top surface of the receiving part 4 with the opening of the bottle cap 3 facing downwards, so that the bottle cap 3 is located between the receiving part 4 and the drive seat 5. The bottle cap 3 and the roller 7 are in contact with each other. At this time, the vision sensor 6 is aligned with the circumferential surface of the bottle cap 3. Then, the roller 7 is rotated by the motor 10. The friction between the roller 7 and the bottle cap 3 is used to drive the bottle cap 3 to rotate. During the rotation of the bottle cap 3, the vision sensor 6 can continuously capture images of it. A single vision sensor can achieve blind-spot-free and full-coverage acquisition of the entire circumferential surface of the bottle cap 3.

[0043] This invention not only solves the problem of missed detection on the side due to a fixed viewing angle, but also helps to more accurately identify two-dimensional printed patterns and three-dimensional defects such as scratches and indentations by acquiring multi-angle images during rotation. Compared with the traditional solution that relies on multiple cameras or manual flipping, this invention achieves more efficient and flexible all-round automated detection with a simpler mechanical structure and lower hardware cost, significantly improving the overall performance and cost-effectiveness of the detection system.

[0044] An installation rod 11 is fixedly connected inside the receiving component 4; a second vision sensor 12 is fixedly connected to the top of the installation rod 11. The vision camera of the second vision sensor 12 faces the bottle cap 3 above it. The second vision sensor 12 can take pictures and collect data on the inner side of the end face of the bottle cap 3 to analyze its end face defects. By using the two vision sensors together, the end face and circumferential surface of the bottle cap 3 can be detected simultaneously, further improving the comprehensiveness and reliability of the defect identification of the bottle cap 3.

[0045] In one embodiment of the present invention, an electric cylinder 13 is connected between the drive seat 5 and the mounting block 9. After the bottle cap 3 is installed in place, the electric cylinder 13 is shortened by controlling it, which drives the mounting block 9 and the roller 7 to move closer to the drive seat 5. As a result, the roller 7 comes into contact with the surface of the bottle cap 3, achieving effective contact between the two and improving the efficiency of the roller 7 in driving the bottle cap 3 to rotate.

[0046] In one embodiment of the present invention, a pressure block 14 is rotatably connected to the bottom of the drive seat 5; a suction cup 15 is fixedly connected to the bottom of the pressure block 14. By setting the suction cup 15 to adhere to the upper side of the bottle cap 3, the stability of the bottle cap 3 during the detection process is improved, and when the roller 7 drives the bottle cap 3 to rotate, the suction cup 15 and the pressure block 14 can rotate synchronously with the bottle cap 3, thereby reducing the rotational resistance of the bottle cap 3.

[0047] In one embodiment of the present invention, a support plate 16 is fixedly connected to the surface of the host 1; an electric cylinder 17 is connected between the support plate 16 and the drive seat 5; the receiving part 4 is a hollow bottle model, and the top of the receiving part 4 is provided with threads for cooperating with the bottle cap 3.

[0048] Initially, there is a gap between the receiving part 4 and the drive seat 5 to facilitate the installation of the bottle cap 3. After the bottle cap 3 is placed on the top surface of the receiving part 4, the control cylinder 17 extends, causing the drive seat 5, mounting bracket 8, and mounting block 9 to move downwards together. The suction cup 15 at the bottom of the drive seat 5 then adheres to the upper side of the bottle cap 3, pressing the bottle cap 3 firmly against the surface of the receiving part 4. The control cylinder 13 shortens, causing the roller 7 to adhere to the bottle cap 3. The motor 10 drives the roller 7 and the bottle cap 3 to rotate. Because the top of the receiving part 4 has threads, the bottle cap 3 can engage with the threads and screw into the outside of the receiving part 4 when rotating. At this time, the control cylinder 17 continues to extend, causing the drive seat 5, vision sensor 16, and roller 7 to continue to move downwards. The drive seat 5 then... The cap 3 provides pressure, allowing it to move smoothly downwards and screw into the receiving part 4. At the same time, vision sensor 6 and vision sensor 12 continuously capture and scan the circumferential and end faces of the cap 3. This device simulates a real bottle model through the receiving part 4. As the bottle body is screwed onto the cap 3, the cap 3 will be slightly enlarged, causing the defects of the cap 3 to be fully exposed. In particular, for cracks in the cap 3, the crack size will further increase after being combined with the bottle body. At this time, the defects of the cap 3 are more obvious and easier to detect. Therefore, by screwing the cap 3 onto the bottle body while using vision sensors to detect the surface of the cap 3, this device can fully discover some flaws that are difficult to identify under the normal state of the cap 3, and improve the defect capture efficiency of the vision sensors.

[0049] In one embodiment of the present invention, an air nozzle 18 and a differential pressure sensor 19 are provided on the upper side of the support base 2 at the internal position of the receiving component 4; an air source device is provided inside the main unit 1; the air source device and the air nozzle 18 are connected by pipelines and valves.

[0050] The defects of the bottle cap 3 include defects in the cap itself and defects in its fit with the bottle body. For example, excessive gaps between the bottle cap 3 and the bottle body may result in an insufficiently tight fit, leading to leakage. In this invention, the defects in the bottle cap 3 itself are detected using the aforementioned visual method, while the defects in the fit of the bottle cap 3 are detected using a pressure difference method. The specific operating steps are as follows:

[0051] After the two vision sensors have analyzed whether the bottle cap 3 itself has any defects, the bottle cap 3 and the receiving part 4 of the simulated bottle are in a tightened fit. Air is supplied to the receiving part 4 through the air source device and air nozzle 18 inside the host 1 to make the receiving part 4 reach a certain high pressure environment. Then the air source device is disconnected, and the pressure change inside the receiving part 4 is monitored by the differential pressure sensor 19 for a period of time. If there is no pressure change or the pressure change is within the allowable error range, it means that the bottle cap 3 and the receiving part 4 are tightly fitted. Otherwise, the bottle cap 3 has a fitting defect.

[0052] A sealing plate 20 is fixedly connected to the top of the mounting rod 11; the sealing plate 20 is sealed and fitted to the inner wall of the receiving part 4; a guide hole 21 is opened inside the sealing plate 20; a solenoid valve 22 is installed inside the guide hole 21.

[0053] The differential pressure solution adopted to address the fitting defect of bottle cap 3 requires a clear premise: that the receiving component 4 itself is in an ideal state and has no leakage problem. Otherwise, it will be impossible to determine whether bottle cap 3 has a fitting defect. Therefore, before implementing the differential pressure solution, the following measures can be taken to eliminate the leakage problem of receiving component 4:

[0054] The guide hole 21 is closed periodically by the solenoid valve 22. At this time, a sealed cavity is formed between the sealing plate 20 and the receiving part 4. Then, air is injected into the sealed cavity through the air source equipment and the air nozzle 18, and detected by the differential pressure sensor 19. If the pressure does not change or is within the allowable error range, it means that the receiving part 4 used to simulate the bottle body does not have a leakage problem. This makes the differential pressure scheme more accurate in detecting the bottle cap 3. If the receiving part 4 does not leak, the solenoid valve 22 is opened during the subsequent detection of the bottle cap 3, so that the air can move upward smoothly through the air hole during inflation to detect the fit defects of the bottle cap 3.

[0055] In one embodiment of the present invention, a retaining ring 23 is fixedly connected to the outer top of the receiving member 4; a toothed ring 24 is rotatably connected to the surface of the receiving member 4 below the retaining ring 23; a gear 25 is meshed with the lower side of the toothed ring 24; the gear 25 is driven and controlled by a motor 26; a storage box 27 is fixedly connected to the surface of the toothed ring 24; a foaming liquid is added inside the storage box 27, which can be a solution of soapy water, dishwashing liquid / laundry detergent, or other professional-grade leak detection liquids such as BAISYLOK or NIC007; an injection cylinder 28 is fixedly connected to the top of the storage box 27; a brush 29 is fixedly connected to one end of the injection cylinder 28 near the retaining ring 23.

[0056] If the differential pressure detection system detects a fit defect in the bottle cap 3, in order to determine where the leak occurs, the motor 26 can drive the gear 25 and the gear ring 24 to rotate. The gear ring 24 then drives the storage box 27, the injection cylinder 28, and the brush 29 on its surface to rotate continuously around the receiving part 4. When the bottle cap 3 and the receiving part 4 are in the engaged state, the bottom of the bottle cap 3 and the retaining ring 23 are close to each other and there is a gap between them. The rotating brush 29 can apply foaming liquid to the annular gap between the bottle cap 3 and the retaining ring 23. Then, under the action of the air pressure inside the receiving part 4, if a bubble bulges at a certain position in the gap, it indicates that the fit between the bottle cap 3 and the receiving part 4 is poor at that position, making the detection results more intuitive and facilitating the staff to record the specific defect location.

[0057] A pumping cylinder 30 is fixedly connected inside the storage box 27 at the corresponding position of the retaining ring 23; a reciprocating block 31 is slidably and sealed inside the pumping cylinder 30; a spring 32 is fixedly connected between the reciprocating block 31 and the pumping cylinder 30; an input pipe 33 and an output pipe 34 are connected to the end of the pumping cylinder 30 away from the retaining ring 23; the input pipe 33 extends to the bottom of the storage box 27, and the output pipe 34 is connected to the injection cylinder 28; a one-way valve is provided inside both the input pipe 33 and the output pipe 34; a set of magnetic blocks 35 are evenly distributed around the circumference of the surface of the retaining ring 23; the magnetic blocks 35 attract each other when they are close to the reciprocating block 31.

[0058] During the rotation of the storage box 27 around the retaining ring 23, when one of the magnetic blocks 35 aligns with the pumping cylinder 30, the magnetic block 35 can attract the reciprocating block 31 and drive the reciprocating block 31 to move inside the pumping cylinder 30. Then, a negative pressure is generated inside the end of the pumping cylinder 30 away from the retaining ring 23. The foaming liquid inside the storage box 27 is drawn into the pumping cylinder 30 through the input pipe 33. When the storage box 27 moves away from the magnetic block 35, the spring 32 pushes the reciprocating block 31 to slide back to its original position, and squeezes the foaming liquid in the pumping cylinder 30 into the injection cylinder 28 through the output pipe 34. Finally, it flows along the injection cylinder 28 to the brush 29. This operation uses the periodic movement of the reciprocating block 31 to continuously pump the foaming liquid, so that the brush 29 always has a sufficient supply of foaming liquid during the application process, preventing the application from being interrupted.

[0059] An elastic sleeve 36 is provided on the outer side of the root of the brush 29, and the elastic sleeve 36 is fixedly connected to the liquid injection cylinder 28; an elastic rope 37 is fixedly connected between the elastic sleeve 36 and the reciprocating block 31, and a guide wheel is provided at the bend of the elastic rope 37.

[0060] During the movement of the reciprocating block 31 inside the pumping cylinder 30, the elastic rope 37 intermittently pulls the brush 29 to produce a peristaltic effect, which changes the tissue density of the brush 29, promotes the uniform transmission of foaming liquid inside the brush 29, improves the transmission efficiency of foaming liquid from the root of the brush 29 to the application end, and avoids uneven application caused by local drying of the brush 29.

[0061] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0062] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic visual inspection device for bottle cap defects, characterized in that: Includes the host (1) and the detection component; The host (1) has a support base (2) fixedly connected to its surface; the host (1) is used to control the detection component to detect the bottle cap (3); The detection component is set on the upper side of the support base (2) and detects defects in the bottle cap (3) using visual technology; the detection component includes a receiving part (4), a drive base (5), a vision sensor (6) and a roller (7). The receiving part (4) is fixedly connected to the surface of the support base (2); a drive base (5) is provided above the receiving part (4); a mounting bracket (8) is fixedly connected to one side of the drive base (5); a vision sensor (6) is fixedly connected to the bottom of the mounting bracket (8); a mounting block (9) is provided on the other side of the receiving part (4); a roller (7) is rotatably connected to the bottom of the mounting block (9); the roller (7) is driven and controlled by a motor (10); The receiving part (4) is internally fixedly connected to an installation rod (11); a second vision sensor (12) is fixedly connected to the top of the installation rod (11). An electric cylinder (13) is connected between the drive seat (5) and the mounting block (9); The bottom of the drive seat (5) is rotatably connected to a pressure block (14); the bottom of the pressure block (14) is fixedly connected to a suction cup (15). The main unit (1) is fixedly connected to a support plate (16); an electric cylinder (17) is connected between the support plate (16) and the drive seat (5); the receiving part (4) is a hollow bottle model, and the top of the receiving part (4) is provided with a thread for cooperating with the bottle cap (3); After placing the bottle cap (3) on the top surface of the receiving part (4), the second electric cylinder (17) is extended, causing the drive seat (5), mounting bracket (8), and mounting block (9) to move downwards together. The suction cup (15) at the bottom of the drive seat (5) then adheres to the upper side of the bottle cap (3) and presses the bottle cap (3) tightly against the surface of the receiving part (4). The first electric cylinder (13) is shortened, causing the roller (7) to adhere to the bottle cap (3). The first motor (10) drives the roller (7) and the bottle cap (3) to rotate. Because the top of the receiving part (4) is threaded, the bottle cap (3) can engage with the thread when rotating. Screw it into the outside of the receiving part (4). At this time, the control cylinder two (17) continues to extend, causing the drive seat (5), vision sensor one (6), and roller (7) to continue to move down. The drive seat (5) provides pressure to the bottle cap (3), so that it moves down smoothly and is screwed into the receiving part (4). At the same time, vision sensor one (6) and vision sensor two (12) continuously photograph and scan the circumferential surface and end face of the bottle cap (3). By screwing the bottle cap (3) onto the bottle body while using the vision sensor to detect the surface of the bottle cap (3), some defects that are difficult to identify under normal conditions can be fully discovered.

2. The automatic visual inspection device for bottle cap defects according to claim 1, characterized in that: An air nozzle (18) and a differential pressure sensor (19) are provided on the upper side of the support base (2) at the internal position of the receiving part (4); an air source device is provided inside the host (1); the air source device and the air nozzle (18) are connected by pipelines and valves.

3. The automatic visual inspection device for bottle cap defects according to claim 2, characterized in that: A sealing plate (20) is fixedly connected to the top of the mounting rod (11); the sealing plate (20) is sealed and fitted with the inner wall of the receiving part (4); a guide hole (21) is opened inside the sealing plate (20); a solenoid valve (22) is installed inside the guide hole (21).

4. The automatic visual inspection device for bottle cap defects according to claim 2, characterized in that: A retaining ring (23) is fixedly connected to the outer top of the receiving part (4); a toothed ring (24) is rotatably connected to the surface of the receiving part (4) below the retaining ring (23); a gear (25) is meshed on the lower side of the toothed ring (24); the gear (25) is driven and controlled by a second motor (26); a storage box (27) is fixedly connected to the surface of the toothed ring (24); an injection cylinder (28) is fixedly connected to the top of the storage box (27); a brush (29) is fixedly connected to one end of the injection cylinder (28) near the retaining ring (23).

5. The automatic visual inspection device for bottle cap defects according to claim 4, characterized in that: A pumping cylinder (30) is fixedly connected inside the storage box (27) at the corresponding position of the retaining ring (23); a reciprocating block (31) is slidably and sealed inside the pumping cylinder (30); a spring (32) is fixedly connected between the reciprocating block (31) and the pumping cylinder (30); the pumping cylinder (30) is connected to an input pipe (33) and an output pipe (34); the input pipe (33) extends to the bottom of the storage box (27), and the output pipe (34) is connected to the injection cylinder (28); a one-way valve is provided inside both the input pipe (33) and the output pipe (34); a set of magnetic blocks (35) are evenly distributed around the circumference of the surface of the retaining ring (23).

6. The automatic visual inspection device for bottle cap defects according to claim 5, characterized in that: An elastic sleeve (36) is provided on the outer side of the root of the brush (29); an elastic rope (37) is fixedly connected between the elastic sleeve (36) and the reciprocating block (31).

Images