Film coating defect detection mechanism

Abstract

The utility model discloses a coating film defect detection mechanism, which comprises a camera used for shooting a product to be detected, a lens arranged below the camera and a light source arranged below the lens, one side of the camera is provided with a spray valve arranged on a fixed plate, the spray valve is arranged on the front side of the camera in the moving direction of the product to be detected, and the spray valve is arranged on the front side of the camera. The lower end of the spray valve penetrates through a through hole formed in the fixing plate, so that a nozzle at the lower end of the spray valve is located below the fixing plate, and a protective cover is installed on the lower surface of the fixing plate and located on the outer side of a spray radiation area of the nozzle. Risks and bad interference to products caused by overflowing of liquid sprayed outwards by the spray valve can be effectively avoided, redundant spray can be collected and discharged in time, and potential safety hazards caused by the fact that water mist is accumulated for a long time and condensed into liquid which drips to pollute a machine table are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coating detection, in particular to a coating defect detection mechanism. Background Art

[0002] In the 3C consumer electronics industry, in order to improve the aging resistance and friction resistance of the product surface, a coating process is usually used to treat the outer surface of glass products to make the surface waterproof, oil-proof, scratch-resistant, anti-fingerprint, anti-pollution and easy to clean. In actual industrial production, the coating process cannot achieve uniform coverage, and often due to many limitations, it leads to poor coating. Therefore, it is necessary to conduct coating quality inspection on the coated products. Currently, manual visual observation is widely used in the industry. Specifically, manual workers use a cloth to dip the detection liquid on the surface of the object to be inspected. The detection liquid is generally alcohol or water vapor. At the same time, the human eye is used to detect defects. Visual inspection is also used to replace manual inspection to improve inspection efficiency. The detection liquid with a certain degree of divergence is easy to overflow during use, causing risks. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a coating defect detection mechanism, which can effectively avoid the risk of liquid sprayed outward from the spray valve overflowing and adverse interference to the product.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a coating defect detection mechanism, comprising: a camera for photographing the product to be inspected, a lens installed under the camera and a light source arranged under the lens, a spray valve installed on a fixed plate is provided on one side of the camera, and the spray valve is located in front of the camera in the moving direction of the product to be inspected, the lower end of the spray valve passes through a through hole opened on the fixed plate, so that the nozzle at the lower end of the spray valve is located below the fixed plate, and a protective cover is installed on the lower surface of the fixed plate and outside the spray radiation area of ​​the nozzle.

[0005] The further improved scheme in the above technical scheme is as follows:

[0006] 1. In the above solution, a wiping block is provided below the light source, and a wiping head is provided at the end of the wiping block for contacting the product to be detected through the wiping cloth.

[0007] 2. In the above solution, a collecting cover is provided below the protective cover, and the collecting cover is connected to a negative pressure collector through a pipeline and has a collecting opening facing the protective cover.

[0008] 3. In the above solution, an outer shield is installed on the surface of one side of the shield, and a first notch is provided on the side wall of the shield facing the collection cover, and a second notch is provided on the side wall of the shield facing the first notch.

[0009] 4. In the above solution, the upper end of the second notch is higher than the upper end of the first notch.

[0010] 5. In the above solution, at least one viewing window is provided on each of the protective cover and the outer shield, and a transparent baffle is provided on the outside of the viewing window.

[0011] 6. In the above solution, the camera, lens and light source are each mounted on a vertically arranged bracket.

[0012] 7. In the above solution, the spray valve is mounted on the upper surface of the fixed plate via a support base, and the support base is provided with a plurality of elongated holes, and the elongated holes connected to the spray valve are extended in the vertical direction.

[0013] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0014] The utility model discloses a coating defect detection mechanism, wherein a spray valve mounted on a fixed plate is provided on one side of its camera, the spray valve is located in front of the camera in the moving direction of the product to be inspected, the lower end of the spray valve passes through a through hole provided on the fixed plate, so that the nozzle at the lower end of the spray valve is located below the fixed plate, and a protective cover is installed on the lower surface of the fixed plate and outside the spray radiation area of ​​the nozzle, which can effectively avoid the risk of liquid overflow sprayed outward from the spray valve and adverse interference to the product; further, a collecting cover is provided below the protective cover, and the collecting cover connected to a negative pressure collector through a pipeline is provided with a collecting opening facing the protective cover, which can collect and discharge excess spray in time, so as to avoid the long-term accumulation of water mist and condensation into liquid droplets that pollute the machine and create safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attachment Figure 1 This is a schematic diagram of the overall structure of the coating defect detection mechanism of the utility model;

[0016] Attachment Figure 2 This is a schematic diagram of the local structure of the coating defect detection mechanism of this utility model Figure 1 ;

[0017] Attachment Figure 3 This is a schematic diagram of the local structure of the coating defect detection mechanism of this utility model Figure 2 ;

[0018] Attachment Figure 4 This is a schematic diagram of the local structure of the coating defect detection mechanism of this utility model Figure 3 ;

[0019] Attachment Figure 5 This is a partial structural cross-sectional view of the coating defect detection mechanism of the present invention.

[0020] In the above drawings: 100, product to be tested; 1, bracket; 2, camera; 3, lens; 4, light source; 5, fixing plate; 6, spray valve; 61, nozzle; 7, through hole; 8, spray radiation area; 9, protective cover; 10, wiping block; 11, wiping head; 12, wiping cloth; 13, collecting cover; 14, negative pressure collector; 15, outer protective cover; 161, first notch; 162, second notch; 17, viewing window; 18, transparent baffle; 19, support seat; 191, long hole. DETAILED DESCRIPTION

[0021] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0022] Example 1: A coating defect detection mechanism includes: a camera 2 for photographing a product to be inspected 100, a lens 3 installed below the camera 2, and a light source 4 arranged below the lens 3. A spray valve 6 installed on a fixed plate 5 is provided on one side of the camera 2. In the moving direction of the product to be inspected 100, the spray valve 6 is located in front of the camera 2. The lower end of the spray valve 6 passes through a through hole 7 opened on the fixed plate 5, so that the nozzle 61 at the lower end of the spray valve 6 is located below the fixed plate 5. A protective cover 9 is installed on the lower surface of the fixed plate 1 and outside the spray radiation area 8 of the nozzle 61.

[0023] A collecting cover 13 is provided below the protective cover 9. The collecting cover 13 is connected to a negative pressure collector 14 through a pipeline and has a collecting opening facing the protective cover 9. The negative pressure collector is purchased from outside and belongs to the scope of existing technology, which will not be described here.

[0024] An outer protective cover 15 is installed on the surface of one side of the above-mentioned protective cover 9. In addition, a first notch 161 is provided on the side wall of the protective cover 15 facing the collection cover 13, and a second notch 162 is provided on the side wall of the above-mentioned protective cover 9 facing the first notch 161; the upper end of the above-mentioned second notch 162 is higher than the upper end of the first notch 161, which can further improve the efficiency of collecting excess water mist.

[0025] At least one viewing window 17 is provided on each of the protective cover 9 and the outer protective cover 15 , and a transparent baffle 18 is provided on the outer side of the viewing window 17 .

[0026] The camera 2 , lens 3 and light source 4 are each mounted on a vertically arranged bracket 1 .

[0027] Example 2: A coating defect detection mechanism includes: a camera 2 for photographing a product to be inspected 100, a lens 3 installed below the camera 2, and a light source 4 arranged below the lens 3. A spray valve 6 installed on a fixed plate 5 is provided on one side of the camera 2. In the moving direction of the product to be inspected 100, the spray valve 6 is located in front of the camera 2. The lower end of the spray valve 6 passes through a through hole 7 opened on the fixed plate 5, so that the nozzle 61 at the lower end of the spray valve 6 is located below the fixed plate 5. A protective cover 9 is installed on the lower surface of the fixed plate 1 and outside the spray radiation area 8 of the nozzle 61.

[0028] A wiping block 10 is provided below the light source 4 , and a wiping head 11 is provided at the end of the wiping block 10 for contacting the product 100 to be detected through a wiping cloth 12 .

[0029] The spray valve 6 is mounted on the upper surface of the fixing plate 5 via a support base 19 . The support base 19 is provided with a plurality of elongated holes 191 . The elongated holes 191 connected to the spray valve 6 extend in the vertical direction.

[0030] The working principle is:

[0031] Used to detect defects on the coated surface of glass products (such as the glass back panel of electronic products). The coated surface is the surface to be wiped and the surface to be tested.

[0032] Wrap the wiping cloth around the wiping block and the outside of the wiping head. The wiping cloth can be dry or pre-soaked with an appropriate amount of test liquid.

[0033] During the test, move the coated surface of the product to be tested upward to the bottom of the nozzle of the spray valve. The spray valve atomizes the test liquid and sprays it onto the coated surface of the product to be tested, thus forming evenly distributed fine mist droplets on the coated surface.

[0034] When the spray valve sprays atomized liquid outward, the protective cover shields the mist liquid and confines it within a certain range, avoiding the risk of overflow of the detection liquid and adverse interference with the product;

[0035] The product to be inspected is then moved under the camera. The wiping head on the wiping block drives the wiping cloth on its outer side to wipe the coated surface of the product to be inspected, where fine mist droplets are evenly distributed. The camera then takes a picture to capture the image data formed by the evaporating and dissipating inspection liquid in the intact coating area and the defective coating area, thereby completing the capture of the defect morphology and laying the preliminary physical foundation for the accurate recognition of the deep learning algorithm. The recognition algorithm for coating defect detection does not fall within the scope of this patent and will not be described in detail here.

[0036] After the test has been carried out for a period of time, the negative pressure collector can be turned on to collect and discharge the mist test liquid that has accumulated for a long time, so as to prevent the water mist from condensing into liquid dripping after a long period of accumulation and contaminating the machine and causing safety hazards.

[0037] When the above-mentioned coating defect detection mechanism is used, it can effectively avoid the risks brought by the overflow of liquid sprayed out of the spray valve and adverse interference with the product; further, the excess spray can be collected and discharged in a timely manner to avoid the long-term accumulation of water mist and condensation into liquid dripping to contaminate the machine and create safety hazards.

[0038] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A coating defect detection mechanism, comprising: A camera (2) for photographing a product (100) to be inspected, a lens (3) mounted below the camera (2), and a light source (4) disposed below the lens (3), characterized in that: a spray valve (6) mounted on a fixed plate (5) is disposed on one side of the camera (2); the spray valve (6) is located in front of the camera (2) in the moving direction of the product (100) to be inspected, the lower end of the spray valve (6) passes through a through hole (7) provided on the fixed plate (5), so that a nozzle (61) at the lower end of the spray valve (6) is located below the fixed plate (5); and a protective cover (9) is mounted on the lower surface of the fixed plate (5) and outside a spray radiation area (8) of the nozzle (61).

2. The coating defect detection mechanism according to claim 1, characterized in that: A wiping block (10) is provided below the light source (4), and a wiping head (11) is provided at the end of the wiping block (10) for contacting the product to be detected (100) through a wiping cloth (12).

3. The coating defect detection mechanism according to claim 1 or 2, characterized in that: A collecting cover (13) is provided below the protective cover (9), and the collecting cover (13) is connected to a negative pressure collector (14) via a pipeline and has a collecting opening facing the protective cover (9).

4. The coating defect detection mechanism according to claim 3, characterized in that: An outer shield (15) is installed on the surface of one side of the shield (9), and a first notch (161) is provided on the side wall of the shield (15) facing the collecting cover (13), and a second notch (162) is provided on the side wall of the shield (9) facing the first notch (161).

5. The coating defect detection mechanism according to claim 4, characterized in that: The upper end of the second notch (162) is higher than the upper end of the first notch (161).

6. The coating defect detection mechanism according to claim 4, characterized in that: At least one viewing window (17) is provided on each of the protective cover (9) and the outer protective cover (15), and a transparent baffle (18) is provided outside the viewing window (17).

7. The coating defect detection mechanism according to claim 1, characterized in that: The camera (2), lens (3) and light source (4) are each mounted on a vertically arranged bracket (1).

8. The coating defect detection mechanism according to claim 1, characterized in that: The spray valve (6) is mounted on the upper surface of the fixed plate (5) via a support seat (19). The support seat (19) is provided with a plurality of elongated holes (191). The elongated holes (191) connected to the spray valve (6) extend in a vertical direction.

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