Metal film online detection system

Abstract

The utility model relates to a metal film on-line detection system which comprises an industrial camera and a luminous source which are arranged on two sides of a metal film, and the axis of a lens on the industrial camera coincides with light emitted by the luminous source and is perpendicular to the surface of the metal film. The luminous source is used for forming light spots at the defect of the metal film, and the industrial camera is used for shooting the outer contour shape of the light spots on the surface of the metal film. The axis of the lens on the industrial camera is perpendicular to the surface of the metal film, so that the industrial camera is located at the optimal shooting position, and the tunnel light source is located at the optimal lighting angle; the metal film to be detected is subjected to real-time online image shooting in the moving process, the shot image is analyzed and processed by the corresponding control device, manual inspection is not needed in the whole process, the detection accuracy is guaranteed, and meanwhile the metal film can be comprehensively inspected.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, especially to an online detection system for metal films. Background Art

[0002] Metal films mainly consist of a PET polyester film (base layer), a metal layer, and the metal layer is connected to the base layer by glue. A functional layer is set on the metal layer to form a metal film with specific functions. For example, silver is plated on the metal layer to form a silver reflective film. Another example is that conductive particles are set on the metal layer to form a metal conductive film. Therefore, metal films are widely used in various industries such as display screens, batteries, electronic appliances, machinery, printing, etc. When producing metal films, some defects will inevitably occur. The most common defect is that the metal layer itself has micropores that cannot be observed by the naked eye, or micropores appear during the process of setting the functional layer on the metal layer. In the prior art, usually after the metal film is produced, users use other optical detection systems to conduct spot checks on the metal film offline. As a result, all defects on the surface of the metal film cannot be effectively detected. At the same time, the method of manual off-line detection is adopted, which has a high labor cost and low production efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide an online detection system for metal films to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: an online detection system for metal films, including industrial cameras and light sources located on both sides of the metal film. The axis of the upper lens of the industrial camera coincides with the light emitted by the light source and is perpendicular to the surface of the metal film; the light source is used to form light spots at the defective parts of the metal film, and the industrial camera is used to photograph the outer contour shape of the light spots on the surface of the metal film.

[0005] Compared with the prior art, by setting the axis of the upper lens of the industrial camera perpendicular to the surface of the metal film, the industrial camera is in the best shooting position and the tunnel light source is in the best lighting angle; the metal film to be detected realizes real-time online image shooting during the moving process, and the captured images are analyzed and processed by the corresponding control device. The whole process does not require manual inspection, which not only ensures the detection accuracy but also can comprehensively inspect the metal film.

[0006] A preferred technical solution of the utility model further includes a frame, on which a connecting rod and a fixing rod are arranged. The connecting rod and the fixing rod are located on both sides of the metal film; a plurality of industrial cameras are fixedly installed on the connecting rod, and the light source is fixedly installed on the fixing rod; the sum of the shooting widths of each industrial camera is adapted to the width of the metal film.

[0007] In a preferred technical solution of the present utility model, the connecting rods are rotatably connected to the machine frame; two fixing seats are fixedly installed on the fixing rod, and the light source is rotatably arranged between the two fixing seats.

[0008] In a preferred technical solution of the present utility model, it further includes a control device and an identification device. The acquisition device and the identification device are arranged in sequence along the moving direction of the metal film; the control device is electrically connected to the acquisition device and the identification device; the control device is used to receive the information of the acquisition device and control the identification device to perform inkjet marking on the defects on the metal film.

[0009] In a preferred technical solution of the present utility model, the identification device includes a support rod located directly above the metal film. A plurality of inkjet mechanisms are arranged in a straight line on the support rod. Each inkjet mechanism is slidably arranged on the support rod. During use, the time required for the inkjet mechanism adjacent to the defect to reach the defect is less than the time required for the defect to reach directly below the inkjet mechanism from the acquisition device.

[0010] In addition to the technical problems solved by the present invention, the technical features constituting the technical solution, and the advantages brought by these technical features of the technical solution described above, other technical problems that the present utility model can solve, other technical features included in the technical solution, and the advantages brought by these technical features will be further described in detail in conjunction with the accompanying drawings. Description of the Drawings

[0011] Figure 1 is the main layout view of the present utility model.

[0012] Figure 2 is the schematic diagram of the defect obtained by the industrial camera of the present utility model.

[0013] Explanation of the reference numerals in the drawings: 01. Placing device, 02. Slitting device, 03. Metal film, 04. Light spot, 05. Acquisition device, 06. Identification device, 07. Industrial camera, 08. Light source, 09. Inkjet mechanism, 10. Machine frame, 11. Connecting rod, 12. Fixing rod, 13. Fixing seat, 14. Support rod. Detailed Embodiments

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0015] As Figure 1-2 shown, the online detection system for the metal film of the present utility model is arranged between the placing device 01 and the slitting device 02 of the metal film 03. The slitting device 02 is used to slit the metal film 03. For example, the metal film 03 with a width of 1000 MM is cut into two metal films 03 with a width of 500 MM. The placing device 01 is used to place the unslit metal film 03 or the already slit metal film 03.

[0016] In this application, the placement device 01 is used to place the unslit metal film 03. It should be noted that the metal film 03 described in this application is a metal reflective film, which includes a base layer and a metal layer covering the base layer, and the metal layer is formed by evaporation or sputtering processes. Thus, a metal reflective film is formed. Since during the production process, a corresponding device is required to form a reflective layer on the film material (metal layer) through evaporation or sputtering processes on the metal layer. As a result, it is impossible to ensure that the reflective layer completely covers the entire metal layer during the production process, so defects that cannot be identified by the naked eye are formed on the metal layer. At the same time, during the production process of the metal layer, defects that cannot be identified by the naked eye also appear on the metal layer.

[0017] In view of the above situation, an acquisition device 05, an identification device 06, and a control device are provided between the placement device 01 and the slitting device 02. When the metal reflective film moves from the placement device 01 towards the slitting device 02, the acquisition device 05 collects the defects on the metal film 03. The control device judges whether the defects are qualified according to the defect information collected by the acquisition device 05. If the defects are unqualified, the control device controls the identification device 06 to mark the unqualified defects. This facilitates the subsequent processes to handle the unqualified defects.

[0018] The acquisition device 05 includes industrial cameras 07 and light sources 08 located on both sides of the metal film 03. The light source 08 is preferably an LED lamp with a supplementary lighting function. The light emitted by the light source 08 coincides with the axis of the upper lens of the industrial camera 07 and is perpendicular to the surface of the metal film 03. When in use, the light emitted by the light source 08 irradiates on the metal film 03. When the light passes through the defective area on the metal film 03, irregular light spots 04 are formed on the surface of the metal film (as Figure 2 shown). When the light irradiates on the qualified area of the metal film 03, the light cannot directly penetrate the metal film 03. And a dark gray area is formed around the light spot 04. Then, the industrial camera 07 takes pictures of the light spot 04 on the surface of the metal film 03 and obtains the outer contour shape of the light spot 04. The control device calculates the area of the defect according to the outer contour line of the light spot 04 obtained by the acquisition device 05. And judges whether the area is qualified. If the light spot 04 is unqualified. Then the control device controls the identification device 06 to mark at the corresponding defect.

[0019] Since the function of the industrial camera 07 in this application is to obtain the outer contour shape of the light spot 04 on the metal film surface, the industrial camera 07 is arranged above the metal film 03 and is perpendicular to the surface of the metal film 03. The perpendicular arrangement can ensure that the outer contour line of the light spot 04 obtained by the industrial camera 07 belongs to an orthographic image. Thus, ensuring the accuracy of the industrial camera 07 when obtaining the light spot 04.

[0020] When the state of the metal film 03 changes while passing between the industrial camera 07 and the light source 08, for example, when the state between the industrial camera 07 and the light source 08 changes from a horizontal state to an inclined state during the passage of the metal film 03, to ensure that the lens axis of the industrial camera 07 is perpendicular to the surface of the metal film 03. A frame 10 is further provided between the placing device 01 and the slitting device 02. A connecting rod 11 and a fixing rod 12 are provided on the frame 10. The connecting rod 11 and the fixing rod 12 are located on both sides of the metal film 03. The connecting rod 11 is rotatably connected to the frame 10 through a bearing. A driving source for driving the connecting rod 11 to rotate is provided on the frame 10. The driving source is preferably a servo motor. A plurality of industrial cameras 07 are fixedly installed on the connecting rod 11 through fasteners. The sum of the shooting widths of each industrial camera 07 is adapted to the width of the metal film 03. Two fixing seats 13 are fixedly installed on the fixing rod 12 through fasteners. The two fixing seats 13 are symmetrically arranged on the fixing rod 12. The light source 08 is rotatably arranged between the two fixing seats 13. The rotation of the light source 08 between the two fixing seats 13 can be adjusted by a driving source or manually. Preferably, a driving source is used to drive the light source 08 to rotate between the two fixing seats 13. The driving source is preferably a servo motor.

[0021] When the metal film 03 is located between the industrial camera 07 and the light source 08. The inclination angle of the metal film 03 is obtained through an inclination sensor or other existing methods, and then the driving source is controlled to start through a control device, so as to timely adjust the angles of both the light source 08 and the industrial camera 07 at the same time, thereby ensuring that the lens axis of the industrial camera 07 is perpendicular to the surface of the metal film 03.

[0022] As Figure 1 shown, the marking device 06 includes a support rod 14 located directly above the metal film 03. The support rod 14 can be arranged on the slitter or supported by a separate stand to make the support rod 14 located directly above the metal film 03. A plurality of inkjet mechanisms 09 are arranged in a row on the support rod 14. The inkjet mechanisms 09 are off-the-shelf standard parts. Each inkjet mechanism 09 is slidably arranged on the support rod 14. Any existing driving source such as a cylinder or a motor acts on the inkjet mechanism 09 to make it slide along the width direction of the metal film 03 on the support rod 14. The total sliding distance of each inkjet mechanism 09 on the support rod 14 is adapted to the width of the metal film 03. Since the metal film 03 moves at a certain speed during the slitting process, and each inkjet mechanism 09 moves on the support rod 14. As a result, the moving direction of the metal film 03 and the moving direction of the inkjet mechanism 09 are perpendicular to each other. Therefore, a plurality of inkjet mechanisms 09 are arranged on the support rod 14 to close the speed difference between the two. Thus, ensuring that each defect can be marked.

[0023] For example, there are two or more defects on a certain straight line of the metal film 03. After the acquisition device 05 detects the corresponding defects, the inkjet mechanism 09 adjacent to the defects is driven by the control device to reach the corresponding positions in advance or simultaneously, and the inkjet mechanism 09 jets ink at the defect positions to mark them. Ensure that each mark is accurately made at the defect position. To ensure that the inkjet mechanism 09 can reach the defect position in advance or simultaneously, the time required for the inkjet mechanism 09 adjacent to the defect to reach the defect is less than the time required for the defect to reach directly below the inkjet mechanism 09 from the acquisition device 05.

[0024] The present utility model can also perform on-line detection on semi-transparent or opaque coating films. The coating film described in this application includes a base layer, and a functional layer or a decorative layer is provided on the base layer. When small holes are formed during the coating process of the functional layer or the decorative layer, on-line detection can be performed using this application.

[0025] If there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, then the directional indications will also change accordingly.

[0026] The above embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An on-line detection system for metal films, characterized in that, It includes an industrial camera and a light source located on both sides of the metal film. The axis of the upper lens of the industrial camera coincides with the light emitted by the light source and is perpendicular to the surface of the metal film. The light source is used to form a light spot at the defect of the metal film, and the industrial camera is used to capture the outer contour shape of the light spot on the surface of the metal film.

2. The on-line detection system for metal film according to claim 1, wherein: It further includes a frame. A connecting rod and a fixing rod are arranged on the frame and are located on both sides of the metal film. A plurality of industrial cameras are fixedly installed on the connecting rod, and the light source is fixedly installed on the fixing rod. The sum of the shooting widths of each industrial camera is adapted to the width of the metal film.

3. The on-line metal film detection system according to claim 2, wherein: The connecting rod is rotatably connected to the frame. Two fixing seats are fixedly installed on the fixing rod, and the light source is rotatably arranged between the two fixing seats.

4. The on-line detection system for metal film according to claim 1, characterized in that: It further includes a control device and a marking device. The acquisition device and the marking device are arranged in sequence along the moving direction of the metal film. The control device is electrically connected to the acquisition device and the marking device. The control device is used to receive the information of the acquisition device and control the marking device to perform inkjet marking on the defects on the metal film.

5. The on-line detection system for metal film according to claim 4, characterized in that: The marking device includes a support rod located directly above the metal film. A plurality of inkjet mechanisms are arranged in a straight line on the support rod. Each inkjet mechanism is slidably arranged on the support rod. During use, the time required for the inkjet mechanism adjacent to the defect to reach the defect is less than the time required for the defect to reach directly below the inkjet mechanism from the acquisition device.

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