Defect detection equipment for protective film

Abstract

The invention relates to the technical field of protective film detection, and discloses protective film defect detection equipment which comprises a detection seat, an industrial detection camera, an air cylinder, a feeding assembly, a winding assembly, a rod type elastic assembly, a piston type rolling assembly and a push-pull air guide assembly. A through first sliding way is formed in the detection base, the feeding assembly and the winding assembly slide in the first sliding way, a protective film is connected between the feeding assembly and the winding assembly, and the industrial detection camera and the piston type rolling assembly are installed on the detection base side by side and located above the protective film. The air cylinder drives the winding assembly to tighten and wind the protective film, the piston type rolling assembly is combined with the static electricity removing and dust removing functions of the ion fan assembly, fine scratches on the surface of the protective film are effectively detected, the integrated detection mechanism remarkably improves the detection precision, and the detection efficiency is improved. The small scratch features which are difficult to recognize originally are more obvious, the detection efficiency is optimized, and the detection time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of protective film detection, and particularly to a defect detection device for a protective film. Background Art

[0002] An automotive protective film is an important product for protecting the surface of an automobile body, improving the appearance quality and service life of the vehicle. Its main functions include preventing scratches, resisting ultraviolet rays, heat insulation, and enhancing the gloss of the car paint. During the production process of the automotive protective film, in order to ensure product quality, it is necessary to detect surface defects. An automated detection method based on industrial cameras and image processing technology is introduced. During detection, the automotive protective film is wound around the loading roller, one end of the protective film is fixed to the surface of the winding roller, and then the winding roller rotates to wind the protective film. During the winding process, the surface of the protective film is scanned by an industrial camera to detect surface defects;

[0003] During the detection process of the automotive protective film, due to its unique optical properties, fine scratch defects on the surface of the protective film may be difficult to be effectively identified during image acquisition and analysis, resulting in unclear defect features, thus seriously affecting the accuracy and reliability of detection.

[0004] To solve the above problems, a defect detection device for a protective film is proposed in this application. Summary of the Invention

[0005] The present invention provides a defect detection device for a protective film, which solves the problem that in the related art, due to the unique optical properties of the protective film, fine scratch defects on the surface of the protective film may be difficult to be effectively identified during image acquisition and analysis, resulting in unclear defect features, thereby affecting the accuracy and reliability of detection.

[0006] A defect detection device for a protective film provided by the present invention includes a detection base, an industrial detection camera, a cylinder, a loading component, a winding component, a rod-shaped elastic component, a piston-type rolling component, and a push-pull air guiding component;

[0007] A through first slideway is opened in the detection base. The loading component and the winding component both slide in the first slideway. A protective film is connected between the loading component and the winding component. The industrial detection camera and the piston-type rolling component are arranged side by side on the detection base and are located above the protective film. The rod-shaped elastic component is connected to one side of the loading component and the detection base. The cylinder is used to drive the winding component to move in the first slideway;

[0008] The push-pull air guiding component is installed on the other side of the detection base and is connected to the winding component. The push-pull air guiding component is used to guide gas into the piston-type rolling component when the cylinder drives the winding component away from the loading component, so that the piston-type rolling component moves downward under the action of air pressure to apply a downward pressure to the protective film.

[0009] As a further optimized solution of the present invention, the rod-shaped elastic component includes a connecting rod and a first tension spring. The connecting rod is installed on the side of the feeding component. One end of the connecting rod slides through one side of the detection seat. The first tension spring is sleeved on the connecting rod, and both ends of the first tension spring are respectively connected to the inner wall of one side of the detection seat and the side of the feeding component.

[0010] As a further optimized solution of the present invention, the piston-type rolling component includes a first air cylinder. An installation block located above the protective film is installed on the detection seat. A through installation hole is opened in the installation block. The first air cylinder is vertically installed in the installation hole. An elastic piston member is installed in the first air cylinder. The bottom end of the elastic piston member slides through the bottom end of the first air cylinder and is installed with a rolling member, and the rolling member is located above the protective film. A first air hole is opened at the bottom end of the first air cylinder, and the top end of the first air cylinder is communicated with the push-pull air guiding component.

[0011] As a further optimized solution of the present invention, the elastic piston member includes a first piston, a first shaft rod and a second spring. The first piston is slidably arranged in the first air cylinder. The first shaft rod is installed at the bottom of the first piston, and the bottom end of the first shaft rod slides through the bottom end of the first air cylinder. The rolling member is installed at the bottom end of the first shaft rod. The second spring is sleeved on the first shaft rod, and both ends of the second spring are respectively connected to the inner wall of the bottom end of the first air cylinder and the first piston.

[0012] As a further optimized solution of the present invention, the rolling member includes a U-shaped frame and a pressing roller. The U-shaped frame is installed at the bottom end of the first shaft rod. The pressing roller is rotatably arranged in the middle of the U-shaped frame. The pressing roller is located above the protective film.

[0013] As a further optimized solution of the present invention, the push-pull air guiding component includes a second air cylinder. The second air cylinder is installed on the other side of the detection seat. A piston-type push-pull member is slidably arranged in the second air cylinder, and one end of the piston-type push-pull member is connected to the winding component. A second air hole is opened at one end of the second air cylinder, and the other end is communicated with a trachea. The end of the trachea far from the second air cylinder is communicated with the top end of the first air cylinder;

[0014] The piston-type push-pull member includes a second piston. The second piston is slidably arranged in the second air cylinder. A second shaft rod is installed on the side of the second piston. One end of the second shaft rod slides through one end of the second air cylinder and is connected to the winding component.

[0015] As a further optimized solution of the present invention, a tubular dust blowing member located above the pressing roller and facing the protective film is installed in the U-shaped frame. The tubular dust blowing member is connected to the ion blower assembly.

[0016] As a further optimized solution of the present invention, the tube-type dust blowing member includes a dust blowing tube, the dust blowing tube is horizontally installed in the U-shaped frame and located above the pressure roller, several dust blowing nozzles are connected to the dust blowing tube and are arranged at intervals and face the protective film, and one end of the dust blowing tube is connected to an ion blower assembly;

[0017] The ion blower assembly includes an ion blower body and an air supply hose, and both ends of the air supply hose are respectively connected to one end of the dust blowing tube and the air outlet end of the ion blower body.

[0018] As a further optimized solution of the present invention, the feeding assembly includes a first assembly block, the first assembly block is slidably arranged in the first slideway, a first motor is installed on the back surface of the first assembly block, the output end of the first motor is connected to a first expansion shaft located on the front surface of the first assembly block, a feeding roller is sleeved on the first expansion shaft, the protective film is wound around the feeding roller, and the other end of the connecting rod and one end of the first tension spring are both connected to the side surface of the first assembly block.

[0019] As a further optimized solution of the present invention, the winding assembly includes a second assembly block, the second assembly block is slidably arranged in the first slideway, the air cylinder is installed on the other side of the detection seat, and the driving end of the air cylinder is connected to the second assembly block. The second assembly block is driven by the air cylinder to approach and move away from the first assembly block. A second motor is installed on the back surface of the second assembly block, the output end of the second motor is connected to a second expansion shaft located on the front surface of the second assembly block, a winding roller is sleeved on the second expansion shaft, one end of the protective film is connected to the winding roller, a second slideway that penetrates and is located above the first slideway is opened in the detection seat, a sliding port communicating with the first slideway is opened at the bottom of the second slideway, a slider that is located in the second slideway and is slidably matched with the sliding port is installed on the second assembly block, and one end of the second shaft rod extends into the second slideway and is connected to the slider.

[0020] The above technical solution of the present invention has the following beneficial technical effects:

[0021] 1. When detecting defects on the protective film in the present invention, the winding component can be driven by a cylinder to slide along the first slideway and move away from the feeding component. Since the protective film is connected between the feeding component and the winding component, under the traction of the protective film, the feeding component can also move along the first slideway, and the rod-shaped elastic component connected to the feeding component is stretched accordingly. The protective film between the feeding component and the winding component is in a taut state. Then, the winding component can wind the protective film in the taut state, and then an industrial inspection camera scans the protective film during the winding process. When the protective film is in a taut state, the small scratches on its surface will be magnified, and the scratch features that were originally difficult to identify become more obvious, enabling the industrial inspection camera to scan out these defects more clearly, thereby reducing the missed detection rate, ensuring the accuracy of the detection results, and providing a more reliable basis for subsequent quality control;

[0022] 2. When the present invention drives the winding component to move away from the feeding component through a cylinder, the winding component immediately pushes the push-pull air guiding component to move, and conducts the gas in the push-pull air guiding component into the piston-type rolling component. After the gas enters the piston-type rolling component, under the action of pressure, it moves downward to apply a downward pressure on the protective film, so that while the protective film bears the tension force, it is also given a downward pressure, which can make the small scratches on the surface of the protective film more prominent, facilitating the industrial inspection camera to quickly and accurately identify them, helping to shorten the detection time, improve the detection efficiency, and at the same time better ensure the detection quality, ensuring that small scratches can be discovered in time;

[0023] 3. During the winding process of the protective film in the present invention, the ion blower component generates a large number of positive and negative ions by ionizing the air, and blows the air flow towards the surface of the protective film through the tube-type dust blowing part, which can remove the small dust particles on the surface of the protective film, and can also neutralize the static electricity on the surface of the protective film, preventing the dust particles from adhering to the surface of the protective film again. Through the integrated operation of removing static electricity and dust from the protective film, it can ensure that the images collected by the industrial inspection camera are clear and accurate, without being interfered by external factors, thereby improving the stability and reliability of the detection system and providing a strong guarantee for high-quality detection.

[0024] 4. The present invention realizes the tensioning and winding of the protective film by driving the winding component through a cylinder, combines the pressure applied by the piston-type rolling component and the function of removing static electricity and dust of the ion blower component, and realizes the effective detection of small scratches on the surface of the protective film. This integrated detection mechanism not only significantly improves the detection accuracy, making the small scratch features that were originally difficult to identify more obvious, but also optimizes the detection efficiency, shortens the detection time, and at the same time ensures the stability and reliability of image acquisition by removing dust and static electricity, enhancing the overall stability of the detection system, and providing a strong guarantee for the high-quality production of automotive protective films. Description of the Drawings

[0025] Figure 1Schematic diagram of the overall structure of a defect detection device for a protective film proposed by the present invention.

[0026] Figure 2 Front view of a defect detection device for a protective film proposed by the present invention.

[0027] Figure 3 Schematic diagram of the back structure of a defect detection device for a protective film proposed by the present invention.

[0028] Figure 4 Schematic diagram of the rod-type elastic component structure of the present invention.

[0029] Figure 5 Schematic diagram of the structure of the loading component and the winding component of the present invention.

[0030] Figure 6 Schematic diagram of the structure of the piston-type rolling component of the present invention.

[0031] Figure 7 Internal sectional view of the first air cylinder of the present invention.

[0032] Figure 8 Schematic diagram of the structure of the tube-type dust blowing part of the present invention.

[0033] Figure 9 Schematic diagram of the structure of the push-pull air guiding component of the present invention.

[0034] Figure 10 Internal sectional view of the second air cylinder of the present invention.

[0035] Figure 11 For the present invention Figure 10 Enlarged view of A in

[0036] Reference numerals: 1, detection seat; 101, industrial detection camera; 102, first slideway; 103, air cylinder; 104, second slideway; 105, mounting block; 2, loading component; 21, first assembly block; 22, first motor; 23, first expansion shaft; 24, loading roller; 3, winding component; 31, second assembly block; 32, second motor; 33, second expansion shaft; 34, winding roller; 35, slider; 4, rod-type elastic component; 41, connecting rod; 42, first tension spring; 5, piston-type rolling component; 51, first air cylinder; 511, first air hole; 52, elastic piston member; 521, first piston; 522, first shaft rod; 523, second spring; 53, rolling member; 531, U-shaped frame; 532, pressure roller; 6, push-pull air guiding component; 61, second air cylinder; 611, second air hole; 62, piston-type push-pull member; 621, second piston; 622, second shaft rod; 63, air duct; 7, tube-type dust blowing part; 71, dust blowing pipe; 72, dust blowing nozzle; 8, ion blower assembly; 81, ion blower body; 82, air supply hose. Specific Embodiment

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0038] As Figures 1-11 shown, a defect detection device for a protective film proposed by the present invention includes a detection base 1, an industrial detection camera 101, a cylinder 103, a feeding assembly 2, a winding assembly 3, a rod-shaped elastic assembly 4, a piston-type rolling assembly 5, and a push-pull air guiding assembly 6;

[0039] A through first slideway 102 is opened in the detection base 1. The feeding assembly 2 and the winding assembly 3 both slide in the first slideway 102. A protective film is connected between the feeding assembly 2 and the winding assembly 3. The industrial detection camera 101 and the piston-type rolling assembly 5 are arranged side by side on the detection base 1 and are located above the protective film. The rod-shaped elastic assembly 4 is connected to one side of the feeding assembly 2 and the detection base 1. The cylinder 103 is used to drive the winding assembly 3 to move in the first slideway 102;

[0040] The push-pull air guiding assembly 6 is installed on the other side of the detection base 1 and is connected to the winding assembly 3. The push-pull air guiding assembly 6 is used to conduct gas into the piston-type rolling assembly 5 when the cylinder 103 drives the winding assembly 3 away from the feeding assembly 2, so that the piston-type rolling assembly 5 moves downward under the action of air pressure to apply a downward pressure to the protective film.

[0041] When detecting the protective film, the cylinder 103 drives the winding assembly 3 to slide along the first slideway 102 away from the feeding assembly 2. Since the protective film is connected between the feeding assembly 2 and the winding assembly 3, under the traction of the protective film, the feeding assembly 2 will also move along the first slideway 102. At this time, the rod-shaped elastic assembly 4 connected to the feeding assembly 2 is stretched, so that the protective film between the feeding assembly 2 and the winding assembly 3 is in a taut state. The winding assembly 3 winds the taut protective film, and the industrial detection camera 101 scans the protective film during the winding process. At the same time, the winding assembly 3 pushes the push-pull air guiding assembly 6, and the push-pull air guiding assembly 6 conducts gas into the piston-type rolling assembly 5. The piston-type rolling assembly 5 moves downward under the action of air pressure to apply a downward pressure to the protective film. In this way, the fine scratches on the surface of the protective film are more obvious under the taut and pressurized states, which is convenient for the industrial detection camera 101 to identify, improves the accuracy of detection, and reduces the missed detection rate.

[0042] As Figure 1 、 Figure 2 And Figure 4As shown, in this embodiment, the rod-type elastic component 4 includes a connecting rod 41 and a first tension spring 42. The connecting rod 41 is installed on the side of the feeding component 2. One end of the connecting rod 41 slides through one side of the detection seat 1. The first tension spring 42 is sleeved on the connecting rod 41, and the two ends of the first tension spring 42 are respectively connected to the inner wall of one side of the detection seat 1 and the side of the feeding component 2. It should be noted that the two ends of the first tension spring 42 are connected to the inner wall of one side of the detection seat 1 and the side of the feeding component 2 by welding. Of course, the first tension spring 42 can also be a spring with hook structures at both ends, and the first tension spring 42 is hooked to the inner wall of one side of the detection seat 1 and the side of the feeding component 2 through the hooks. This embodiment also falls within the protection scope of this application. When the winding component 3 moves away from the feeding component 2 under the action of the air cylinder 103, the feeding component 2 is driven by the protective film to move. The connecting rod 41 moves together with the feeding component 2 and slides on the detection seat 1. In this process, the first tension spring 42 is stretched to generate an elastic tension force, so that the protective film is always kept in a taut state, ensuring that the small scratches on the surface of the protective film can be magnified during the winding process, which is beneficial to the clear scanning of the industrial inspection camera 101 and improves the detection accuracy.

[0043] As Figure 1 shown Figure 6 in this embodiment, the piston-type rolling component 5 includes a first air cylinder 51. An installation block 105 located above the protective film is installed on the detection seat 1. A through installation hole is provided in the installation block 105. The first air cylinder 51 is vertically installed in the installation hole. An elastic piston member 52 is installed in the first air cylinder 51. The bottom end of the elastic piston member 52 slides through the bottom end of the first air cylinder 51 and is installed with a rolling member 53. The rolling member 53 is located above the protective film. A first air hole 511 is provided at the bottom end of the first air cylinder 51. The top end of the first air cylinder 51 is communicated with the push-pull air guiding component 6. The winding component 3 pushes the push-pull air guiding component 6, and the gas enters the top end of the first air cylinder 51 through the air duct 63. The elastic piston member 52 in the first air cylinder 51 moves downward under the action of the air pressure, driving the rolling member 53 to move downward to apply pressure to the protective film. The first air hole 511 at the bottom end of the first air cylinder 51 is used to balance the air pressure to prevent the pressure from being too large or too small from affecting the rolling effect. This structure enables the protective film to be further pressed downward on the basis of being taut, further highlighting the small scratches, facilitating the identification by the industrial inspection camera 101, and improving the detection efficiency and quality.

[0044] As Figure 6 shown Figure 7As shown, in this embodiment, the elastic piston member 52 includes a first piston 521, a first shaft rod 522, and a second spring 523. The first piston 521 is slidably disposed in the first air cylinder 51. The first shaft rod 522 is installed at the bottom of the first piston 521, and the bottom end of the first shaft rod 522 slidably passes through the bottom end of the first air cylinder 51. The rolling member 53 is installed at the bottom end of the first shaft rod 522. The second spring 523 is sleeved on the first shaft rod 522, and both ends of the second spring 523 are respectively connected to the inner wall of the bottom end of the first air cylinder 51 and the first piston 521. After the gas enters the first air cylinder 51, it pushes the first piston 521 to move downward. The first piston 521 drives the first shaft rod 522 to slide downward, and the rolling member 53 installed at the bottom end of the first shaft rod 522 moves downward accordingly, playing a role of buffering and assisting in resetting during the downward movement and resetting of the elastic piston member 52. Such a design can ensure that the rolling member 53 stably applies pressure to the protective film, ensuring that fine scratches on the surface of the protective film are more easily detected during inspection.

[0045] As Figure 7 with Figure 8 shown, in this embodiment, the rolling member 53 includes a U-shaped frame 531 and a pressing roller 532. The U-shaped frame 531 is installed at the bottom end of the first shaft rod 522. The pressing roller 532 is rotatably disposed in the middle of the U-shaped frame 531. The pressing roller 532 is located above the protective film, and the surface of the pressing roller 532 can abut against the protective film. The first shaft rod 522 drives the U-shaped frame 531 to move downward, and the pressing roller 532 in the middle of the U-shaped frame 531 contacts the protective film and applies pressure accordingly. Both ends of the pressing roller 532 are rotatably connected to the inner walls on both sides of the U-shaped frame 531, enabling the pressing roller 532 to roll when pressing the protective film, reducing damage to the protective film, and at the same time ensuring uniform distribution of pressure, making fine scratches on the surface of the protective film more prominent under uniform pressure, facilitating accurate identification by the industrial inspection camera 101.

[0046] As Figure 1 , Figure 2 , Figure 9 , Figure 10 with Figure 11 shown, in this embodiment, the push-pull air guiding assembly 6 includes a second air cylinder 61. The second air cylinder 61 is installed on the other side of the detection seat 1. A piston-type push-pull member 62 is slidably disposed in the second air cylinder 61, and one end of the piston-type push-pull member 62 is connected to the winding assembly 3. A second air hole 611 is opened at one end of the second air cylinder 61, and the other end is communicated with an air guiding pipe 63. The end of the air guiding pipe 63 far from the second air cylinder 61 is communicated with the top end of the first air cylinder 51. The piston-type push-pull member 62 includes a second piston 621. The second piston 621 is slidably disposed in the second air cylinder 61. A second shaft rod 622 is installed on the side surface of the second piston 621. One end of the second shaft rod 622 slidably passes through one end of the second air cylinder 61 and is connected to the winding assembly 3.

[0047] When the coiling assembly 3 moves, it drives the second shaft rod 622 connected thereto to move. The second shaft rod 622 is connected to the second piston 621. The second piston 621 slides within the second air cylinder 61. The second air hole 611 at one end of the second air cylinder 61 is used for air intake and exhaust. When the second piston 621 slides, the gas within the second air cylinder 61 is pressed into the first air cylinder 51 through the air duct 63, realizing the air supply to the piston type rolling assembly 5, enabling it to apply pressure to the protective film and enhancing the detection effect.

[0048] As Figure 3 , Figure 7 shown in Figure 8 , in this embodiment, a tubular dust blowing member 7 is installed within the U-shaped frame 531 above the pressing roller 532 and facing the protective film. The tubular dust blowing member 7 is connected to the ion blower assembly 8; the tubular dust blowing member 7 includes a dust blowing pipe 71. The dust blowing pipe 71 is horizontally installed within the U-shaped frame 531 and above the pressing roller 532. A plurality of dust blowing nozzles 72 are connected to the dust blowing pipe 71 at intervals and facing the protective film. One end of the dust blowing pipe 71 is connected to the ion blower assembly 8; the ion blower assembly 8 includes an ion blower body 81 and an air supply hose 82. The two ends of the air supply hose 82 are respectively connected to one end of the dust blowing pipe 71 and the air outlet end of the ion blower body 81;

[0049] The ion blower body 81 generates ionized air and conveys the air flow to the dust blowing pipe 71 through the air supply hose 82. The dust blowing nozzles 72 arranged at intervals on the dust blowing pipe 71 blow the air flow towards the surface of the protective film. This structural design enables the ionized air to act evenly on the surface of the protective film, effectively removing dust and neutralizing the static electricity on the surface of the protective film, ensuring that the industrial inspection camera 101 captures an undisturbed image and improving the accuracy of the detection result.

[0050] As Figure 1 shown in Figure 5 , in this embodiment, the feeding assembly 2 includes a first assembly block 21. The first assembly block 21 is slidably arranged within the first slideway 102. A first motor 22 is installed on the back surface of the first assembly block 21. The output end of the first motor 22 is connected to a first expansion shaft 23 located on the front surface of the first assembly block 21. A feeding roller 24 is sleeved on the first expansion shaft 23. The protective film is wound around the feeding roller 24. The other end of the connecting rod 41 and one end of the first tension spring 42 are both connected to the side surface of the first assembly block 21;

[0051] Start the first motor 22. The first motor 22 drives the first expansion shaft 23 to rotate. The feeding roller 24 sleeved on the first expansion shaft 23 rotates accordingly, releasing the protective film. When the winding assembly 3 moves away from the feeding assembly 2 under the action of the cylinder 103, the feeding roller 24 moves with the feeding assembly 2 to ensure the continuous and stable supply of the protective film, providing guarantee for subsequent tensioning, winding and detection; The first expansion shaft 23 mainly plays a role in fixing the feeding roller 24, facilitating the disassembly and assembly of the feeding roller 24.

[0052] As Figure 1 、 Figure 2 and Figure 5 shown, in this embodiment, the winding assembly 3 includes a second assembly block 31. The second assembly block 31 is slidably arranged in the first slideway 102. The cylinder 103 is installed on the other side of the detection seat 1, and the driving end of the cylinder 103 is connected to the second assembly block 31. The second assembly block 31 is driven by the cylinder 103 to approach and move away from the first assembly block 21. A second motor 32 is installed on the back of the second assembly block 31. The output end of the second motor 32 is connected to a second expansion shaft 33 located on the front of the second assembly block 31. A winding roller 34 is sleeved on the second expansion shaft 33. One end of the protective film is connected to the winding roller 34. A second slideway 104 is opened in the detection seat 1 and runs through and is located above the first slideway 102. A sliding port communicating with the first slideway 102 is opened at the bottom of the second slideway 104. A slider 35 located in the second slideway 104 and slidably matched with the sliding port is installed on the second assembly block 31. One end of the second shaft rod 622 extends into the second slideway 104 and is connected to the slider 35;

[0053] The cylinder 103 drives the second assembly block 31 to move in the first slideway 102, approaching or moving away from the first assembly block 21. The second motor 32 on the second assembly block 31 drives the second expansion shaft 33 to rotate. The winding roller 34 on the second expansion shaft 33 rotates accordingly to wind the protective film. The slider 35 on the second assembly block 31 slides in the second slideway 104, and the second shaft rod 622 is connected to the slider 35, so that the winding assembly 3 drives the push-pull air guiding assembly 6 to work when moving. In this way, the winding assembly 3 realizes the winding of the protective film and the driving of the push-pull air guiding assembly 6, ensuring the smooth progress of the whole detection process.

[0054] The specific working principle of the present invention is as follows:

[0055] First, wind the protective film on the feeding roller 24 and fix one end on the winding roller 34. Start the first motor 22, and the feeding roller 24 rotates to release the protective film. At the same time, start the cylinder 103. The cylinder 103 pushes the winding assembly 3 to move away from the feeding assembly 2 along the first slideway 102. The feeding assembly 2 moves under the traction of the protective film. The connecting rod 41 and the first tension spring 42 of the rod-shaped elastic assembly 4 cooperate to tension the protective film;

[0056] When the rewinding assembly 3 moves, it drives the piston - type push - pull member 62 to slide within the second air cylinder 61, and presses the gas into the first air cylinder 51 through the air duct 63. Under the action of air pressure, the elastic piston member 52 in the first air cylinder 51 makes the first piston 521 push the first shaft rod 522, causing the pressing roller 532 of the rolling member 53 to move downward to apply pressure to the protective film.

[0057] Meanwhile, the ion blower assembly 8 blows ionized air onto the surface of the protective film through the tubular dust - blowing member 7 to remove dust and neutralize static electricity. The second motor 32 of the rewinding assembly 3 drives the rewinding roller 34 to rotate to wind the protective film, and the industrial inspection camera 101 scans the surface of the protective film during the winding process.

[0058] Through the collaborative work of the above - mentioned components, under the states of tension, pressure, dust removal, and static - electricity removal of the protective film, the fine scratches on its surface are more easily recognized by the industrial inspection camera 101, achieving accurate detection of the surface defects of the protective film, ensuring the reliability of the detection results, and providing strong support for the quality control of the protective film.

[0059] It should be understood that the above - mentioned specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modification examples that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A defect detection device for a protective film, characterized in that, It includes a detection base (1), an industrial detection camera (101), a cylinder (103), a feeding assembly (2), a winding assembly (3), a rod-shaped elastic assembly (4), a piston-type rolling assembly (5) and a push-pull air guiding assembly (6); A through first slideway (102) is formed in the detection base (1). The feeding assembly (2) and the winding assembly (3) both slide in the first slideway (102). A protective film is connected between the feeding assembly (2) and the winding assembly (3). The industrial detection camera (101) and the piston-type rolling assembly (5) are arranged side by side on the detection base (1) and are located above the protective film. The rod-shaped elastic assembly (4) is connected to one side of the feeding assembly (2) and the detection base (1). The cylinder (103) is used to drive the winding assembly (3) to move in the first slideway (102); The push-pull air guiding assembly (6) is installed on the other side of the detection base (1) and is connected to the winding assembly (3). When the cylinder (103) drives the winding assembly (3) to move away from the feeding assembly (2), the push-pull air guiding assembly (6) is used to guide gas into the piston-type rolling assembly (5), so that the piston-type rolling assembly (5) moves under the action of air pressure to apply a downward pressure on the protective film.

2. The defect detection device for a protective film according to claim 1, characterized in that, The rod-shaped elastic assembly (4) includes a connecting rod (41) and a first tension spring (42). The connecting rod (41) is installed on the side surface of the feeding assembly (2). One end of the connecting rod (41) slides through one side of the detection base (1). The first tension spring (42) is sleeved on the connecting rod (41), and the two ends of the first tension spring (42) are respectively connected to the inner wall of one side of the detection base (1) and the side surface of the feeding assembly (2).

3. The defect detection device for a protective film according to claim 2, wherein The piston-type rolling assembly (5) includes a first air cylinder (51). An installation block (105) located above the protective film is installed on the detection base (1). A through installation hole is formed in the installation block (105). The first air cylinder (51) is vertically installed in the installation hole. An elastic piston member (52) is installed in the first air cylinder (51). The bottom end of the elastic piston member (52) slides through the bottom end of the first air cylinder (51) and is installed with a rolling member (53), and the rolling member (53) is located above the protective film. A first air hole (511) is formed at the bottom end of the first air cylinder (51). The top end of the first air cylinder (51) is communicated with the push-pull air guiding assembly (6).

4. The defect detection device for a protective film according to claim 3, characterized in that, The elastic piston member (52) includes a first piston (521), a first shaft rod (522) and a second spring (523). The first piston (521) is slidably arranged in the first air cylinder (51). The first shaft rod (522) is installed at the bottom of the first piston (521), and the bottom end of the first shaft rod (522) slides through the bottom end of the first air cylinder (51). The rolling member (53) is installed at the bottom end of the first shaft rod (522). The second spring (523) is sleeved on the first shaft rod (522), and the two ends of the second spring (523) are respectively connected to the inner wall of the bottom end of the first air cylinder (51) and the first piston (521).

5. The defect detection device for a protective film according to claim 4, wherein, The roll pressing member (53) includes a U-shaped frame (531) and a pressure roller (532). The U-shaped frame (531) is installed at the bottom end of the first shaft rod (522). The pressure roller (532) is rotatably arranged in the middle of the U-shaped frame (531), and the pressure roller (532) is located above the protective film.

6. The defect detection device for a protective film according to claim 5, characterized in that, The push-pull air guiding assembly (6) includes a second air cylinder (61). The second air cylinder (61) is installed on the other side of the detection seat (1). A piston-type push-pull member (62) is slidably arranged in the second air cylinder (61), and one end of the piston-type push-pull member (62) is connected to the winding assembly (3). A second air hole (611) is opened at one end of the second air cylinder (61), and a trachea (63) is communicated with the other end. The end of the trachea (63) away from the second air cylinder (61) is communicated with the top end of the first air cylinder (51); The piston-type push-pull member (62) includes a second piston (621). The second piston (621) is slidably arranged in the second air cylinder (61). A second shaft rod (622) is installed on the side surface of the second piston (621). One end of the second shaft rod (622) slidably passes through one end of the second air cylinder (61) and is connected to the winding assembly (3).

7. The defect detection device for a protective film according to claim 6, characterized in that, A tube-type dust blowing member (7) which is located above the pressure roller (532) and faces the protective film is installed in the U-shaped frame (531). The tube-type dust blowing member (7) is connected to an ion fan assembly (8).

8. The defect detection device for a protective film according to claim 7, characterized in that, The tube-type dust blowing member (7) includes a dust blowing tube (71). The dust blowing tube (71) is horizontally installed in the U-shaped frame (531) and is located above the pressure roller (532). A plurality of dust blowing nozzles (72) which are arranged at intervals and face the protective film are connected to the dust blowing tube (71). One end of the dust blowing tube (71) is connected to the ion fan assembly (8); The ion fan assembly (8) includes an ion fan body (81) and a supply air hose (82). The two ends of the supply air hose (82) are respectively connected to one end of the dust blowing tube (71) and the air outlet end of the ion fan body (81).

9. The defect detection device for a protective film according to claim 8, characterized in that, The feeding assembly (2) includes a first assembly block (21). The first assembly block (21) is slidably arranged in the first slideway (102). A first motor (22) is installed on the back surface of the first assembly block (21). The output end of the first motor (22) is connected to a first expansion shaft (23) located on the front surface of the first assembly block (21). A feeding roller (24) is sleeved on the first expansion shaft (23). The protective film is wound around the feeding roller (24). The other end of the connecting rod (41) and one end of the first tension spring (42) are both connected to the side surface of the first assembly block (21).

10. The defect detection device for a protective film according to claim 9, characterized in that, The winding assembly (3) includes a second assembly block (31) which is slidably arranged in the first slideway (102). The air cylinder (103) is installed on the other side of the detection seat (1), and the driving end of the air cylinder (103) is connected to the second assembly block (31). The second assembly block (31) is driven by the air cylinder (103) to approach and move away from the first assembly block (21). A second motor (32) is installed on the back surface of the second assembly block (31), and the output end of the second motor (32) is connected to a second expansion shaft (33) located on the front surface of the second assembly block (31). A winding drum (34) is sleeved on the second expansion shaft (33), and one end of the protective film is connected to the winding drum (34). A second slideway (104) which penetrates and is located above the first slideway (102) is formed in the detection seat (1). A sliding opening communicating with the first slideway (102) is formed at the bottom of the second slideway (104). A sliding block (35) which is located in the second slideway (104) and is in sliding fit with the sliding opening is installed on the second assembly block (31). One end of the second shaft rod (622) extends into the second slideway (104) and is connected to the sliding block (35).

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