A long-period appearance detection device for a film

Abstract

The utility model belongs to film detection technical field relates to a kind of film long-period appearance detection device, including unwinding mechanism, winding mechanism and the detection mechanism between the two;Detection mechanism includes cover plate, diffusion plate, grating and sink from top to bottom sequentially arranged horizontally;Cover plate is located above the film running path, and window is provided in middle area, and upper surface is equipped with switch A, and lower surface is equipped with lamp, and switch A is connected with lamp;Diffusion plate is located below the film running path, and it has removable characteristic;Grating has removable characteristic;The inside of sink is equipped with heating element, and outer wall is equipped with switch B, and switch B is connected with heating element.This device can realize the inspection of film longitudinal long-period appearance defect, and the film defects that cannot be observed by traditional method such as printing, diamond pattern, oil stain can be observed on the same equipment, and the film does not need to be cut and sampled, secondary injury caused in traditional sampling process is avoided, and the accuracy of defect determination is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of thin film testing technology, specifically relating to a long-cycle appearance testing device for thin films. Background Technology

[0002] The high-end market demands increasingly higher quality film appearance, but due to the softness of the film material, appearance defects are easily generated during processing. Common causes include: incomplete cleaning of the slitting diamond rollers, leading to the adhesion of low-molecular-weight substances such as dust to the film surface; roller scratches on the film, causing indentations upon contact with the roller surface; roller friction during film production causing low-molecular-weight substances to detach and form dust impurities on the film surface; and oil splashed onto the film surface by the chain clamps during film production.

[0003] Currently, the commonly used method for inspecting the appearance of thin films in the industry is to randomly select a few samples after the large master roll is produced and suspend them in front of a lightbox for observation. This method has the following limitations:

[0004] Limited longitudinal inspection range: It is impossible to obtain long longitudinal film samples for visual inspection, and some defects may be periodically distributed in the longitudinal direction (the period length can reach 20-30 meters). Small-scale sampling is prone to missed detection.

[0005] Defect tracing is difficult: When quality inspectors take samples, the soft film is prone to creases, making it difficult to distinguish whether the defect was generated during the sampling process or left over from the original film production process.

[0006] High rate of missed detection for defects such as indentations and oil stains: The light box inspection method is difficult to take into account the observation of indentations and oil stains, and such defects are not easy to be detected under the illumination of the light box.

[0007] Some high-end industries have attempted to conduct visual inspections during the master roll slitting process, but the slitting speed of small rolls is typically above 400 meters per minute, making it difficult to observe the film's appearance in detail during high-speed operation. Furthermore, defects can only be detected through reflected light during slitting, and hidden defects such as scratches, diamond patterns, and oil stains cannot be identified. These undetected defects are amplified during downstream processing (such as coating), ultimately affecting product quality.

[0008] Therefore, it is necessary to improve existing technologies in order to solve these problems. Utility Model Content

[0009] The purpose of this invention is to address the shortcomings of existing technologies and propose a long-cycle appearance inspection device for thin films.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A long-cycle appearance inspection device for thin films includes an unwinding mechanism and a winding mechanism, and further includes an inspection mechanism located between the unwinding mechanism and the winding mechanism;

[0012] The testing apparatus includes cover plates, diffuser plates, mesh grids, and water tanks arranged horizontally and spaced from top to bottom;

[0013] The cover plate is located above the film running path, with a viewing window in the middle area, a switch A on the upper surface, and a light on the lower surface. The switch A is connected to the light.

[0014] The diffuser plate is located below the film's running path and is removable;

[0015] The mesh grille is removable;

[0016] The water tank has a heating element inside and a switch B on the outer wall, which is connected to the heating element.

[0017] As a preferred technical solution:

[0018] As described above, in a long-cycle appearance inspection device for thin films, the distance between the cover plate and the diffuser plate is 100-120cm; the distance between the diffuser plate and the grid is 5-10cm; and the distance between the grid and the water tank is 3-5cm.

[0019] The long-cycle appearance inspection device for thin films described above uses a diffusion plate made of PET, PP, or PS with a thickness of 250 μm.

[0020] As described above, the long-cycle appearance inspection device for thin films uses an aluminum alloy grid, which is not prone to rust. The grid allows water vapor to flow upwards evenly and can also disperse the direction of steam flow, reducing the local steam concentration.

[0021] The long-cycle appearance inspection device for thin films described above further includes support columns A, B, C, and D; the cover plate is a rectangular plate, with its four corners supported by support columns A, B, C, and D respectively.

[0022] The thin film long-cycle appearance inspection device described above further includes tripods A, B, C, and D; tripods A, B, C, and D are respectively connected to pillars A, B, C, and D; and the diffuser plate is supported by tripods A, B, C, and D.

[0023] The long-cycle appearance inspection device for thin films described above further includes tripods E, F, G, and H; tripods E, F, G, and H are respectively connected to pillars A, B, C, and D; the grid is supported by tripods E, F, G, and H.

[0024] The film long-cycle appearance inspection device described above includes an unwinding mechanism comprising an unwinding roller, a motor B, a coupling B, a right-angle bracket B, a traction roller B, a trapezoidal bracket C, and a trapezoidal bracket D.

[0025] The bearing of the unwinding roller is connected to the output shaft of motor B via coupling B; motor B is supported by right-angle bracket B; right-angle bracket B is connected to support column D;

[0026] The traction roller B is located above the unwinding roller; the two ends of the inner ring of the bearing of the traction roller B are fixedly connected to the trapezoidal bracket C and the trapezoidal bracket D respectively. The cylinder of the traction roller B can still rotate around its own central axis to ensure that the film is flat when passing through the traction roller B. The trapezoidal bracket C is connected to the support column C, and the trapezoidal bracket D is connected to the support column D.

[0027] The winding mechanism includes a winding roller, motor A, coupling A, right-angle bracket A, traction roller A, trapezoidal bracket A, and trapezoidal bracket B;

[0028] The bearing of the take-up roller is connected to the output shaft of motor A via coupling A; motor A is supported by right-angle bracket A; right-angle bracket A is connected to support column B;

[0029] Traction roller A is located above the take-up roller; the two ends of the inner ring of the bearing of traction roller A are fixedly connected to trapezoidal bracket A and trapezoidal bracket B respectively. The cylinder of traction roller A can still rotate around its own central axis to ensure that the film is flat when passing through traction roller A. Traezoidal bracket A is connected to support column A, and trapezoidal bracket B is connected to support column B.

[0030] The outer wall of the water tank is also equipped with a switch C, which is connected to both motor B and motor A.

[0031] In the long-cycle appearance inspection device for thin films described above, both the unwinding roller and the winding roller are rubber rollers.

[0032] In the long-cycle appearance inspection device for thin films described above, the highest points of traction roller B and traction roller A are aligned.

[0033] Beneficial effects:

[0034] This invention enables the inspection of long-term longitudinal appearance defects in thin films, solving the problem of easy omission of longitudinal periodic defects (such as those with a long period of 20-30 meters). It can also observe thin film defects such as tarnish, diamond patterns, and oil stains that are difficult to observe using traditional methods on the same equipment.

[0035] When using this invention to inspect the appearance of the film, there is no need to cut and sample the film, which avoids secondary damage such as creases caused by the softness of the film during the traditional sampling process, ensuring the accuracy of defect judgment and avoiding misjudgment of the original film production quality.

[0036] This invention has a simple structure, is easy to manufacture, has low cost, requires little experience from quality inspectors, is easy to operate and inspect, and improves the efficiency of film appearance inspection. Attached Figure Description

[0037] Figure 1 This is a bottom view of the cover plate of the detection device of this utility model;

[0038] Figure 2 This is a schematic diagram of the left-side structure of the detection device of this utility model;

[0039] Figure 3 This is a schematic diagram of the main structure of the detection device of this utility model;

[0040] Figure 4 This is a top view of the detection device of this utility model;

[0041] Figure 5 This is a three-dimensional structural diagram of the detection device of this utility model;

[0042] Among them, 1-Switch A, 2-Window, 3-Lamp, 4-Cover plate, 5-Support A, 6-Support B, 7-Support C, 8-Support D, 9-Traction roller A, 10-Traction roller B, 11-Trapezoidal bracket A, 12-Trapezoidal bracket B, 13-Trapezoidal bracket C, 14-Trapezoidal bracket D, 19-Triangle bracket A, 20-Triangle bracket B, 23-Triangle bracket E, 24-Triangle bracket F, 27-Diffuser plate, 28-Grid, 29-Heating element, 30-Water tank, 31-Switch B, 32-Switch C, 33-Right angle bracket A, 34-Right angle bracket B, 35-Motor A, 36-Motor B, 37-Coupling A, 38-Coupling B, 39-Take-up roller, 41-Unwind roller. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] A long-term appearance inspection device for thin films, such as Figures 1-5 As shown, it includes an unwinding mechanism, a winding mechanism, a detection mechanism, support columns A5, B6, C7, D8, tripods A19, B20, C, D, E23, F24, G, and H;

[0045] like Figure 5 As shown, the detection mechanism is located between the unwinding mechanism and the winding mechanism, and includes a cover plate 4, a diffuser plate 27, a mesh grid 28 and a water tank 30 arranged horizontally with spacing from top to bottom;

[0046] like Figure 5 As shown, cover plate 4 is a rectangular plate located above the film running path, with its four corners supported by pillars A5, B6, C7, and D8 respectively; a viewing window 2 is provided in the middle area of ​​cover plate 4, and a switch A1 is provided on its upper surface, as shown. Figure 3 As shown, a lamp 3 is provided on the lower surface, and switch A1 is connected to lamp 3;

[0047] The diffuser plate 27 is located below the film running path and is removable; preferably, it is a PET, PP, or PS plate with a thickness of 0 μm. Figure 3 As shown, the diffuser plate 27 is supported by tripods A19, B20, C, and D; at the same time, tripods A19, B20, C, and D are respectively connected to support columns A5, B6, C7, and D8.

[0048] The mesh grille 28 is removable, and is preferably made of aluminum alloy; such as Figure 3 As shown, the grid 28 is supported by tripods E23, F24, G, and H; at the same time, tripods E23, F24, G, and H are respectively connected to support posts A5, B6, C7, and D8.

[0049] like Figure 5 As shown, the water tank 30 has a heating element 29 inside and a switch B 31 and a switch C 32 on its outer wall. The switch B 31 is connected to the heating element 29.

[0050] The distance between the cover plate 4 and the diffuser plate 27 is 100-120cm; the distance between the diffuser plate 27 and the mesh grid 28 is 5-10cm; the distance between the mesh grid 28 and the water tank 30 is 3-5cm.

[0051] like Figure 4 , Figure 5As shown, the unwinding mechanism includes an unwinding roller 41, a motor B 36, a coupling B 38, a right-angle bracket B 34, a traction roller B10, a trapezoidal bracket C13, and a trapezoidal bracket D14.

[0052] The unwinding roller 41 is a rubber roller, and its bearing is connected to the output shaft of the motor B 36 via a coupling B 38; the motor B 36 is supported by a right-angle bracket B 34; the right-angle bracket B 34 is connected to the support column D 8;

[0053] The traction roller B10 is located above the unwinding roller 41; the two ends of the bearing inner ring of the traction roller B10 are fixedly connected to the trapezoidal bracket C13 and the trapezoidal bracket D14 respectively, the trapezoidal bracket C13 is connected to the support column C7, and the trapezoidal bracket D14 is connected to the support column D8.

[0054] like Figure 4 , Figure 5 As shown, the winding mechanism includes a winding roller 39, a motor A35, a coupling A37, a right-angle bracket A33, a traction roller A9, a trapezoidal bracket A11, and a trapezoidal bracket B12;

[0055] The take-up roller 39 is a rubber roller, and its bearing is connected to the output shaft of the motor A35 via a coupling A37; the motor A35 is supported by a right-angle bracket A33; the right-angle bracket A33 is connected to the support column B6;

[0056] The traction roller A9 is located above the take-up roller 39; the two ends of the bearing inner ring of the traction roller A9 are fixedly connected to the trapezoidal bracket A11 and the trapezoidal bracket B12 respectively. The trapezoidal bracket A11 is connected to the support column A5, and the trapezoidal bracket B12 is connected to the support column B6.

[0057] The highest points of traction rollers B10 and A9 are aligned, and switch C32 is simultaneously connected to motors B36 and A35.

[0058] The procedure for using this device is as follows:

[0059] When using this device to inspect the appearance of the film, first turn on switch A1 to ensure that light 3 is on. Then, place the small roll of film with the paper tube to be inspected on the unwinding roller 41, unroll the film, pass it over the traction rollers B10 and A9, and then use double-sided tape to fix the end of the film to the paper core on the take-up roller 39. Next, turn on switch C32. Switch C32 simultaneously controls motors A35 and B36 to rotate, so that the small roll of film is unwound and wound up at the same time (the winding speed of the film is 2-3 m / min). At this time, place the diffuser plate 27 above tripods A19, B20, C, and D, and observe through window 2 whether there is a black shadow on the diffuser plate 27 to determine whether there are any marks on the film. Record the location of the marks for traceability.

[0060] Once the film has been completely unwound, press switch C32 to stop the machine and begin unwinding and rewinding.

[0061] Meanwhile, remove the diffuser plate 27 and place the grid 28 above tripods E 23, F 24, G, and H. First, inject an appropriate amount of purified water into the water tank 30, turn on switch B 31, and let the heating element 29 heat for a period of time to generate steam. Then, press switch C 32 to reverse motors B 36 and A 35, transferring the film from the take-up roller 39 to the unwind roller 41. Observe through the viewing window 2 whether there are water droplets or diamond patterns on the film to determine whether the slitting roller is clean or whether there is oil on the film. When all the film on the take-up roller 39 has been transferred to the unwind roller 41, press switches A1, B 31, and C 32 to remove the film.

[0062] Finally, follow up on the observation results to analyze the scratches, oil stains, and diamond patterns on the film, find the causes of abnormal film appearance and solve them one by one. This can not only effectively prevent products with abnormal appearance from flowing out, but also detect problems in time and reduce factory losses.

Claims

1. A long-cycle appearance inspection device for thin films, comprising an unwinding mechanism and a rewinding mechanism, characterized in that, It also includes a testing mechanism located between the unwinding mechanism and the rewinding mechanism; The testing apparatus includes a cover plate (4), a diffuser plate (27), a mesh grid (28), and a water tank (30) arranged horizontally and spaced from top to bottom; The cover plate (4) is located above the film running path. A viewing window (2) is opened in the middle area. A switch A (1) is provided on the upper surface and a lamp (3) is provided on the lower surface. The switch A (1) is connected to the lamp (3). The diffuser plate (27) is located below the film running path and is removable; The mesh (28) is removable; The water tank (30) is equipped with a heating element (29) inside and a switch B (31) on the outer wall. The switch B (31) is connected to the heating element (29).

2. The long-cycle appearance inspection device for thin films according to claim 1, characterized in that, The distance between the cover plate (4) and the diffuser plate (27) is 100-120cm; the distance between the diffuser plate (27) and the mesh grid (28) is 5-10cm; and the distance between the mesh grid (28) and the water tank (30) is 3-5cm.

3. The long-cycle appearance inspection device for thin films according to claim 1, characterized in that, The diffusion plate (27) is a PET plate, PP plate or PS plate with a thickness of 250μm.

4. The long-cycle appearance inspection device for thin films according to claim 1, characterized in that, The mesh grid (28) is an aluminum alloy grid.

5. The long-cycle appearance inspection device for thin films according to claim 1, characterized in that, The long-cycle appearance inspection device for thin films also includes support columns A (5), B (6), C (7) and D (8); the cover plate (4) is a rectangular plate, and its four corners are supported by support columns A (5), B (6), C (7) and D (8) respectively.

6. The long-cycle appearance inspection device for thin films according to claim 5, characterized in that, The long-cycle appearance inspection device for thin films also includes tripods A (19), B (20), C and D; tripods A (19), B (20), C and D are respectively connected to support columns A (5), B (6), C (7) and D (8); the diffuser plate (27) is supported by tripods A (19), B (20), C and D.

7. The long-cycle appearance inspection device for thin films according to claim 5, characterized in that, The long-cycle appearance inspection device for thin films also includes tripods E (23), F (24), G and H; tripods E (23), F (24), G and H are respectively connected to pillars A (5), B (6), C (7) and D (8); the grid (28) is supported by tripods E (23), F (24), G and H.

8. The long-cycle appearance inspection device for thin films according to claim 5, characterized in that, The unwinding mechanism includes an unwinding roller (41), a motor B (36), a coupling B (38), a right-angle bracket B (34), a traction roller B (10), a trapezoidal bracket C (13), and a trapezoidal bracket D (14); The bearing of the unwinding roller (41) is connected to the output shaft of the motor B (36) via a coupling B (38); the motor B (36) is supported by a right-angle bracket B (34); the right-angle bracket B (34) is connected to the support column D (8); The traction roller B (10) is located above the unwinding roller (41); the two ends of the bearing inner ring of the traction roller B (10) are fixedly connected to the trapezoidal bracket C (13) and the trapezoidal bracket D (14) respectively. The trapezoidal bracket C (13) is connected to the support column C (7), and the trapezoidal bracket D (14) is connected to the support column D (8). The winding mechanism includes a winding roller (39), a motor A (35), a coupling A (37), a right-angle bracket A (33), a traction roller A (9), a trapezoidal bracket A (11), and a trapezoidal bracket B (12); The bearing of the take-up roller (39) is connected to the output shaft of the motor A (35) via a coupling A (37); the motor A (35) is supported by a right-angle bracket A (33); the right-angle bracket A (33) is connected to the support column B (6); The traction roller A (9) is located above the take-up roller (39); the two ends of the bearing inner ring of the traction roller A (9) are fixedly connected to the trapezoidal bracket A (11) and the trapezoidal bracket B (12) respectively. The trapezoidal bracket A (11) is connected to the support column A (5), and the trapezoidal bracket B (12) is connected to the support column B (6). The outer wall of the water tank (30) is also equipped with a switch C (32), which is connected to both motor B (36) and motor A (35).

9. A long-cycle appearance inspection device for thin films according to claim 8, characterized in that, Both the unwinding roller (41) and the winding roller (39) are rubber rollers.

10. A long-cycle appearance inspection device for thin films according to claim 8, characterized in that, The highest points of traction roller B (10) and traction roller A (9) are aligned.

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