Defect detection machine for plastic film production

Abstract

The utility model relates to the technical field of plastic film detection equipment, and discloses a defect detection machine for plastic film production, which comprises a bottom plate, an adjusting mechanism and a detection mechanism, and the adjusting mechanism comprises four adjusting frames arranged in a matrix mode. According to the defect detection machine for plastic film production, the height of the tension shaft is adjusted through linkage of the electric push rod and the sliding block, and in combination with adjustability of the limiting piece, accurate control over the tension degree of films of different sizes and transverse limiting in the conveying process are achieved; the problems of wrinkles and tensile deformation caused by non-uniform tensioning or deviation in traditional detection are effectively avoided, a flat surface condition is provided for the visual detection module, the detection plate driven by the two-way lead screw can adjust the detection area of the visual module and adapt to detection of different film widths, the detachable visual detection module is convenient to use, and the detection efficiency is improved. And flexible replacement of high-precision optical equipment is supported, the transmission detection requirement of a transparent film is met, and defect identification of an opaque film can be coped with through visual detection.

Description

A defect detection machine for plastic film production Technical Field

[0001] This utility model relates to the technical field of plastic film inspection equipment, specifically a defect detection machine for plastic film production. Background Technology

[0002] Plastic film is made from polymer synthetic materials as the main raw material, which are mixed with other auxiliary materials in a certain proportion and then formed on plastic molding machinery into plastic products with a certain thickness, width and unlimited length, and a flat, smooth and soft surface.

[0003] An existing patent (publication number: CN221253308U) discloses a defect detection machine for plastic film production, comprising: a base plate, a support plate, and a tension adjustment mechanism. The support plate is fixedly mounted on the base plate, and three grooves are formed on the support plate. The tension adjustment mechanism is disposed on the support plate. The tension adjustment mechanism includes two round rods, two moving blocks, two connecting rods, a servo motor, a threaded rod, two moving blocks, two connecting rods, two connecting blocks, two round rods, and two adjusting rollers. This invention, by incorporating a tension adjustment mechanism, simplifies operation and allows for tension adjustment of the conveyed plastic film during defect detection. This prevents damage and wrinkling of the film due to excessive tension during conveying, thus avoiding any impact on detection accuracy.

[0004] The above-mentioned method can adjust the tension of the plastic film being transported for defect detection, thereby avoiding damage and wrinkles caused by excessive tension during transport, which would affect the accuracy of the detection. However, there may be deviations during transport, affecting the detection of the film. Furthermore, when detecting some semi-transparent or opaque films, the infrared penetration effect is poor, affecting the detection results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a defect detection machine for plastic film production, which has advantages such as detecting films of different widths and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a defect detection machine for plastic film production, comprising a base plate, an adjustment mechanism, and a detection mechanism. The adjustment mechanism includes four adjustment frames arranged in a matrix. The bottom end of each adjustment frame is fixedly connected to the base plate. A slider is slidably connected up and down inside each adjustment frame. A tension shaft is rotatably connected between every two adjacent sliders. A set of adjustment holes is opened on the outer surface of each tension shaft. An electric push rod is installed at the top of each adjustment frame. The output end of each electric push rod is fixedly connected to the top of the adjacent slider.

[0007] The detection mechanism includes two detection frames, with a bidirectional lead screw rotatably connected between the top and bottom of each frame. Two detection plates are slidably connected between the two frames, and the two ends of each plate are threadedly connected to the adjacent bidirectional lead screws. A visual inspection module is installed on the side of each plate that is close to the other.

[0008] Furthermore, two limiting members are installed on the outer surfaces of both tension shafts. Each limiting member includes two semicircular discs. Each pair of semicircular discs is sleeved with the tension shaft, and each pair of semicircular discs is fixedly connected to the tension shaft by bolts.

[0009] The above solution effectively prevents the film from shifting during transport by setting the limiting component, ensuring the detection effect. The limiting component is fixedly connected to the tension shaft by bolts, and the position of the limiting component can be easily adjusted to accommodate films of different widths.

[0010] Furthermore, a release shaft and a take-up shaft are respectively installed at both ends of the base plate.

[0011] The above scheme, through the setting of the release shaft and the rewind shaft, can achieve the purpose of releasing the film and rewinding it after the detection is completed.

[0012] Furthermore, pulleys are fixedly connected to the bottom ends of both bidirectional lead screws, and the two pulleys are connected by belt drive. A motor is installed at the top of one of the detection frames, and the output end of the motor is fixedly connected to the top of the bidirectional lead screw close to it by a coupling.

[0013] The above scheme, through the setting of pulleys, can achieve the synchronous rotation of two bidirectional lead screws, thereby improving adjustment stability.

[0014] Furthermore, both of the aforementioned visual inspection modules are detachable.

[0015] The above solution, with its detachable visual inspection module, facilitates maintenance personnel in carrying out inspections and repairs.

[0016] Furthermore, two sets of detection rollers are rotatably connected between the two detection frames.

[0017] With the above scheme, by setting up two sets of detection rollers, the plastic film can pass between the two detection rollers, thereby achieving the flatness of the plastic film between the two vision detection modules and further improving the detection effect.

[0018] Furthermore, the outer surfaces of both detection rollers and both tension shafts are polished.

[0019] By polishing the outer surfaces of the detection roller and tension shaft using the above method, wear on the plastic film can be reduced.

[0020] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0021] This defect detection machine for plastic film production uses an electric push rod and a slider to adjust the height of the tension shaft. Combined with the adjustable structure of the limiting component, it achieves precise control of the tension of films of different sizes and lateral limiting during the conveying process. This effectively avoids the wrinkles and stretching deformation problems caused by uneven tension or offset in traditional detection. It provides a flat surface condition for the vision inspection module. The bidirectional screw-driven detection plate can adjust the detection area of ​​the vision module to adapt to the detection of different film widths. The detachable vision inspection module supports flexible replacement of high-precision optical equipment. It can meet the transmission detection requirements of transparent films and also identify defects such as bubbles, scratches, and foreign objects in opaque films through visual inspection. Attached Figure Description

[0022] Figure 1 is a three-dimensional schematic diagram of the overall structure of this application;

[0023] Figure 2 is a sectional view of the overall structure of this application from the front;

[0024] Figure 3 is a structural diagram of the regulating mechanism of this application;

[0025] Figure 4 is a structural diagram of the testing organization in this application;

[0026] Figure 5 is a structural diagram of the limiting component of this application.

[0027] In the picture:

[0028] 1. Base plate; 2. Adjustment mechanism; 201. Adjustment frame; 202. Slider; 203. Tension shaft; 204. Adjustment hole; 205. Electric actuator;

[0029] 3. Testing mechanism; 301. Testing frame; 302. Two-way lead screw; 303. Testing plate; 304. Visual inspection module;

[0030] 4. Limiting components; 401. Semi-circular disc; 402. Bolt;

[0031] 5. Release shaft; 6. Rewind shaft; 7. Pulley; 8. Motor; 9. Detection roller. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] Please refer to Figures 1, 2, and 3. This embodiment describes a defect detection machine for plastic film production, comprising a base plate 1, an adjustment mechanism 2, and a detection mechanism 3. A release shaft 5 and a winding shaft 6 are respectively installed at both ends of the base plate 1. The release shaft 5 and winding shaft 6 enable the release detection of the film and the winding up of the film after detection. The adjustment mechanism 2 includes four adjustment frames 201 arranged in a matrix. The bottom end of each adjustment frame 201 is fixedly connected to the base plate 1. Each adjustment frame 201 has a slider 202 slidably connected vertically inside. A tension shaft 20 is rotatably connected between every two adjacent sliders 202. 3. Each tension shaft 203 has a set of adjustment holes 204 on its outer surface. Each adjustment frame 201 has an electric push rod 205 installed at its top. The output end of each electric push rod 205 is fixedly connected to the top of its adjacent slider 202. By setting the electric push rod 205 and slider 202, the height of the tension shaft 203 can be adjusted. By pressing down and lifting the tension shaft 203, the tension of the film can be controlled. The outer surfaces of the two detection rollers 9 and the two tension shafts 203 are polished. Polishing the outer surfaces of the detection rollers 9 and the tension shafts 203 can reduce wear on the plastic film.

[0034] Please refer to Figures 1, 2, and 5. Two limiting members 4 are installed on the outer surfaces of the two tension shafts 203. Each limiting member 4 includes two semicircular disks 401. Each pair of semicircular disks 401 is sleeved with the tension shaft 203. Each pair of semicircular disks 401 is fixedly connected to the tension shaft 203 by bolts 402. By setting the limiting members 4, the film can be effectively prevented from shifting during the conveying process, thus ensuring the detection effect. By fixing the limiting members 4 to the tension shaft 203 by bolts 402, the position of the limiting members 4 can be easily adjusted, thereby achieving the effect of adapting to films of different widths.

[0035] Please refer to Figures 1, 2, and 4. The inspection mechanism 3 includes two inspection frames 301. A bidirectional lead screw 302 is rotatably connected between the top and bottom of each inspection frame 301. Two inspection plates 303 are slidably connected between the two inspection frames 301. The two ends of each inspection plate 303 are threadedly connected to the bidirectional lead screw 302 that is close to it. A vision inspection module 304 is installed on the side of each inspection plate 303 that is close to each other. By setting the bidirectional lead screw 302, the two inspection plates 303 can be moved closer or further apart, thereby achieving the purpose of inspecting plastic films of different widths.

[0036] Please refer to Figures 1, 2, and 4. Each of the two bidirectional lead screws 302 has a pulley 7 fixedly connected to its bottom end. The two pulleys 7 are connected by a belt drive. A motor 8 is mounted on the top of one of the inspection frames 301. The output end of the motor 8 is fixedly connected to the top of the adjacent bidirectional lead screw 302 via a coupling. The pulleys 7 enable synchronous rotation of the two bidirectional lead screws 302, improving adjustment stability. Both vision inspection modules 304 are detachable, facilitating maintenance. Two sets of inspection rollers 9 are rotatably connected between the two inspection frames 301. These rollers allow the plastic film to pass between them, ensuring the flatness of the plastic film between the two vision inspection modules 304 and further improving the inspection effect.

[0037] This embodiment of a defect detection machine for plastic film production uses the linkage between the electric push rod 205 and the slider 202 to adjust the height of the tension shaft 203. Combined with the adjustable structure of the limiting component 4, it achieves precise control of the tension of films of different sizes and lateral limiting during the conveying process. This effectively avoids the problems of wrinkles and stretching deformation caused by uneven tension or offset in traditional detection. It provides a flat surface condition for the vision inspection module 304. The detection plate 303 driven by the bidirectional lead screw 302 can adjust the detection area of ​​the vision module to adapt to the detection of different film widths. The detachable vision inspection module 304 supports flexible replacement of high-precision optical equipment, which can not only meet the transmission detection requirements of transparent films, but also identify defects such as bubbles, scratches, and foreign objects in opaque films through visual inspection.

[0038] The working principle of the above embodiment is as follows: After the plastic film unfolds from the release shaft 5 of the base plate 1, it enters the area of ​​the adjustment mechanism 2. The adjustment frame 201 drives the slider 202 to slide up and down through the electric push rod 205, which drives the tension shaft 203 to rise and fall, adjusting the height of the tension shaft 203 to keep the film in a uniform tension state, avoiding tensile damage caused by excessive tension or wrinkles caused by insufficient tension, and providing a flat surface for subsequent inspection. The limiting member 4 is fixed to the tension shaft 203 by bolts 402. The distance between the two semicircular disks 401 can be adjusted according to the width of the film to prevent the film from shifting laterally during the conveying process. After being guided by the detection roller 9, the film enters the detection mechanism 3. In the testing area, the motor 8 at the top of the testing frame 301 synchronously drives two bidirectional lead screws 302 to rotate via pulley 7, causing two testing plates 303 to move in opposite directions along the lead screws to quickly adapt to the film width. The detachable vision inspection module 304 inside the testing plate 303 inspects both sides of the film. The vision inspection module 304 scans the film surface and performs noise reduction, enhancement, and segmentation through the built-in image processing unit. The system compares the image grayscale difference with a preset threshold to identify defects such as black spots, scratches, and holes. The polished surface of the testing roller 9 reduces friction to ensure that high-value films are not damaged during testing. The film that has completed testing is wound up by the take-up shaft 6.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A defect detection machine for plastic film production, comprising a base plate (1), an adjustment mechanism (2), and a detection mechanism (3), characterized in that: The adjustment mechanism (2) includes four adjustment frames (201) arranged in a matrix. The bottom end of each adjustment frame (201) is fixedly connected to the base plate (1). Each adjustment frame (201) has a slider (202) that slides up and down inside. A tension shaft (203) is rotatably connected between every two adjacent sliders (202). Each tension shaft (203) has a set of adjustment holes (204) on its outer surface. Each adjustment frame (201) has an electric push rod (205) installed at its top. The output ends are fixedly connected to the top of the slider (202) that is close to it respectively; the detection mechanism (3) includes two detection frames (301), and a bidirectional lead screw (302) is rotatably connected between the top and bottom of the two detection frames (301). Two detection plates (303) are slidably connected between the two detection frames (301). The two ends of the two detection plates (303) are threadedly connected to the bidirectional lead screw (302) that is close to it respectively. A visual inspection module (304) is installed on the side of the two detection plates (303) that is close to each other.

2. The defect detection machine for plastic film production according to claim 1, characterized in that: Two limiting members (4) are installed on the outer surfaces of the two tension shafts (203). Each limiting member (4) includes two semi-circular disks (401). Each pair of semi-circular disks (401) is sleeved with the tension shaft (203). Each pair of semi-circular disks (401) is fixedly connected to the tension shaft (203) by bolts (402).

3. The defect detection machine for plastic film production according to claim 1, characterized in that: The base plate (1) is equipped with a release shaft (5) and a winding shaft (6) at its two ends respectively.

4. A defect detection machine for plastic film production according to claim 1, characterized in that: Both of the two bidirectional lead screws (302) are fixedly connected to the bottom end of a pulley (7), and the two pulleys (7) are connected by a belt drive. One of the detection frames (301) is equipped with a motor (8) at the top end, and the output end of the motor (8) is fixedly connected to the top end of the bidirectional lead screw (302) that is close to it by a coupling.

5. A defect detection machine for plastic film production according to claim 1, characterized in that: Both of the aforementioned visual inspection modules (304) are detachable.

6. A defect detection machine for plastic film production according to claim 1, characterized in that: Two sets of detection rollers (9) are rotatably connected between the two detection frames (301).

7. A defect detection machine for plastic film production according to claim 6, characterized in that: The outer surfaces of the two detection rollers (9) and the two tension shafts (203) are all polished.

Images