A high-precision copper foil pinhole detection device

Abstract

The present invention relates to the field of copper foil detection technology, and specifically discloses a high-precision copper foil pinhole detection device, comprising a support base placed horizontally on the ground, a detection box fixedly installed in the middle position of the upper surface of the support base, and a control panel fixedly installed on the side of the detection box, a copper foil body to be detected is inserted into the detection box, and the copper foil body is rolled up by a winding roller, and the winding roller is rotatably installed on the inner side of a mounting frame, the mounting frame is fixedly installed on the side of the support base, and a guide roller for guiding the copper foil body is rotatably installed on the upper surface of the support base. The high-precision copper foil pinhole detection device adopts a new structural design, a shading plate is set to be made of insulating rubber material, and static electricity is generated by friction between the shading plate and its surface during the transportation of the copper foil body, and dust on the copper foil surface is adsorbed by static electricity, thereby removing dust on the copper foil body surface to prevent dust from affecting subsequent detection accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of copper foil detection, in particular to a high-precision copper foil pinhole detection device. Background Art

[0002] Copper foil is an important material in the electronics manufacturing industry. It can be used to produce electronic products such as circuit boards. During the production process of copper foil, due to the friction between impurities and copper foil, tiny holes (i.e. pinholes) may appear in the copper foil. Therefore, pinhole detection is required after the copper foil is produced to remove unqualified parts.

[0003] In the process of copper foil pinhole detection, optical detection or chemical corrosion is generally used, such as:

[0004] In the prior art, a Chinese patent with announcement number CN114878586B (application date 2022-03-10) discloses an electrolytic copper foil pinhole detection and marking system, which aims to provide a real-time monitoring and accurate marking electrolytic copper foil pinhole detection and marking system; it is used for electrolytic copper foil pinhole detection and marking, that is, when the electrolytic copper foil passes under the industrial camera, it is illuminated by the light source below, and the pinholes on the copper foil are transparent under the light and show light spots. The industrial camera records the surface of the copper foil and transmits the data to an external data processing terminal for real-time analysis and processing. When the external data processing terminal counts that the number of pinholes in the picture taken by the industrial camera exceeds a predetermined number, the data processing terminal issues an alarm and the labeling mechanism starts to run to move the label above the copper foil and advance at the same speed as the copper foil through the horizontal drive mechanism, and then the label is attached to the end edge of the electrolytic copper foil.

[0005] In the prior art, a Chinese patent with announcement number CN115791572B (application date 2023-02-13) discloses a detection device for penetration points and pinholes of electrolytic copper foil, and an adaptive adjustment mechanism is provided. According to the width of the electrolytic copper foil, the adjusting rod is rotated, and the two positioning plates are driven to move relative to each other through the screw, so that the two positioning plates are in contact with the side of the electrolytic copper foil for positioning. The movement of the positioning plate can drive the liquid guide seat to rotate on the center seat and adjust the inclination angle to facilitate the subsequent discharge of excess copper sulfate solution. Furthermore, the rotation of the adjusting rod can drive the rotation of the gear, and then drive the two movable plates to move relative to each other, so that the movable plate drives the nozzle to move through the guide rod, adjusts the angle of the nozzle, and avoids the solution sprayed from the nozzle from scattering on the outside of the electrolytic copper foil, thereby reducing waste.

[0006] The above two devices respectively use optical detection and chemical corrosion to detect pinholes in copper foil. However, in actual use, if optical detection is used, dust attached to the surface of the copper foil during production may fall into the pinhole surface, thereby affecting the passage of light and causing misjudgment of the device, that is, the existence of the pinhole cannot be detected at the location where the dust is attached. Summary of the invention

[0007] The object of the present invention is to provide a high-precision copper foil pinhole detection device to solve the problem raised in the above background technology that dust adhesion affects the optical detection result.

[0008] To achieve the above object, the present invention provides the following technical solution: a high-precision copper foil pinhole detection device, comprising a support base horizontally placed on the ground, a detection box fixedly installed in the middle of the upper surface of the support base, and a control panel fixedly installed on the side of the detection box, and also comprising:

[0009] The copper foil body to be inspected is inserted into the inspection box, and the copper foil body is rolled up by a winding roller, and the winding roller is rotatably mounted on the inner side of the mounting frame, the mounting frame is fixedly mounted on the side of the supporting base, and a guide roller for guiding the copper foil body is rotatably mounted on the upper surface of the supporting base;

[0010] A matrix light source for emitting light is fixedly mounted on the upper surface of the support base, and a photosensitive element for detecting the light source is fixedly mounted on the lower surface of the detection box, and shading plates arranged at equal intervals are installed on the front side of the detection box. The shading plates are made of soft insulating rubber material, and the friction between the shading plates and the copper foil body generates static electricity to absorb dust. A dust cleaning mechanism for cleaning dust on the surface of the shading plates is arranged above the shading plates;

[0011] An inkjet device for spraying markings is fixedly installed on the inner side wall of the detection box;

[0012] A smoothing roller is rotatably mounted on the front end of the upper surface of the support base, and the smoothing roller is in contact with the upper surface of the copper foil body.

[0013] Preferably, the cleaning mechanism includes a connecting plate fixedly mounted on the upper end of the shading plate and a cleaning nozzle fixedly mounted on the outer surface of the connecting plate, the lower surface of the shading plate is in contact and friction with the upper surface of the copper foil body, and the connecting plate is configured as a hollow structure.

[0014] Preferably, the connection plate is connected to the air outlet position of the heat dissipation box through a delivery hose fixedly installed on the upper surface of the connection plate, and the heat dissipation box is fixedly installed on the outside of the upper surface of the detection box.

[0015] Preferably, a limiting column is fixedly installed on the outer surface of the detection box, and the middle section of the delivery hose and the limiting column are squeezed against each other, and the bending angle of the contact position between the delivery hose and the limiting column exceeds 90 degrees.

[0016] Preferably, a guide slide bar which is slidably connected to the connecting plate is fixedly mounted on the outer surface of the detection box, and a return spring which is fixedly mounted to the upper surface of the connecting plate is arranged outside the upper end of the guide slide bar.

[0017] Preferably, an iron metal sheet is fixedly mounted on the upper surface of the connecting plate, and the metal sheet and the electromagnet fixedly mounted on the outer surface of the detection box correspond to each other in vertical position, and a grounding wire is fixedly mounted on the upper end of the electromagnet.

[0018] Preferably, an identification camera and a re-inspection camera are fixedly installed on the rear outer surface of the detection box, and the position of the identification camera corresponds to the position of the inkjet device laterally, and the re-inspection camera is set as a high-definition wide-angle lens, and the re-inspection camera and the identification camera are electrically connected to a signal transmitter fixedly installed on the upper surface of the detection box.

[0019] Preferably, a connecting rod rotatably connected to the support base is fixedly installed at the rear end of the smoothing roller, and a full gear is coaxially fixedly installed at the lower end of the connecting rod, and a connecting spring is fixedly installed between the side of the connecting rod and the upper surface of the support base.

[0020] Preferably, a half gear is connected to the side of the full gear, and a driven bevel gear is coaxially fixedly installed above the half gear to drive it to rotate synchronously.

[0021] Preferably, the side surface of the driven bevel gear is meshingly connected with a driving bevel gear for mutual transmission therewith, and the driving bevel gear is coaxially fixedly installed with one of the guide rollers.

[0022] Compared with the prior art, the invention has the following beneficial effects: the high-precision copper foil pinhole detection device adopts a new structural design, and its specific contents are as follows:

[0023] 1. The copper foil is rolled up by the winding roller. During the rolling process, the copper foil passes through the inside of the detection box. At this time, the matrix light source on the upper surface of the support base is turned on to illuminate the surface of the copper foil. If there is a pinhole on the surface of the copper foil, the light will pass through the pinhole to the top of the copper foil (at this time, the shading plate is used to block the external light to avoid affecting the detection accuracy). At this time, the photosensitive element on the lower surface of the detection box detects the light and determines that there is a pinhole at that position, thereby achieving the purpose of detecting the pinhole;

[0024] Furthermore, the shading plate is made of insulating rubber material, and static electricity is generated by friction between the shading plate and the surface of the copper foil during the conveying process of the copper foil body, and the dust on the surface of the copper foil is adsorbed by static electricity, thereby removing the dust on the surface of the copper foil body and preventing the dust from affecting the accuracy of subsequent detection;

[0025] Furthermore, the cleaning mechanism arranged above the sunshade plate energizes the electromagnet, so that a magnetic attraction is generated between the electromagnet and the metal sheet, thereby causing the metal sheet to drive the connecting plate and the sunshade plate to move upward. After the electromagnet contacts the metal sheet, the static electricity in the sunshade plate is guided out by the grounding wire above, thereby reducing the adhesion of dust. At the same time, after moving upward, the conveying hose is separated from the squeezing between the limit column, so that the conveying hose is conductive, and the air in the heat dissipation box is introduced into the air and sprayed out from the cleaning nozzle, so as to achieve the purpose of cleaning the dust on the surface of the sunshade plate and ensure its subsequent use effect.

[0026] 2. When the pinhole position is detected, the inkjet device sprays a corresponding mark on the surface of the copper foil body, and then uses the recognition camera to recognize the mark. After recognizing the mark, the re-inspection camera is turned on to take a high-definition photo of the copper foil body at the corresponding position and transmit the picture to the computer through the signal transmitter. After that, the staff can retrieve the picture on the computer and enlarge it for re-inspection.

[0027] 3. The guide roller rotates under the friction of the copper foil body. During the rotation, the half gear is driven to rotate through the transmission between the active bevel gear and the driven bevel gear. The meshing between the half gear and the full gear is used to make the connecting rod drive the smoothing roller to rotate. At the same time, the connecting rod spring is used to make the smoothing roller rotate back and forth, so as to smooth the surface of the copper foil body and reduce the influence of wrinkles on the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the upper surface structure of the support base of the present invention;

[0030] Figure 3 This is a schematic diagram of the lower surface structure of the detection box of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the sunshade of the present invention;

[0032] Figure 5 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0033] Figure 6 This is a schematic diagram of the positional relationship between the delivery hose and the limiting column of the present invention;

[0034] Figure 7 This is a schematic diagram of the positional relationship between the copper foil body and the detection box of the present invention;

[0035] Figure 8 This is a schematic diagram of the back structure of the detection box of the present invention;

[0036] Fig. 9 For the present invention Figure 7 The enlarged structural diagram at B in the middle;

[0037] Fig.10 This is a schematic diagram of the transmission relationship structure of the smoothing roller of the present invention;

[0038] Fig.11 It is a schematic diagram of the meshing relationship between the full gear and the half gear of the present invention.

[0039] In the figure: 1. Support base; 2. Detection box; 3. Control panel; 4. Copper foil body; 5. Winding roller; 6. Mounting frame; 7. Guide roller; 8. Matrix light source; 9. Photosensitive element; 10. Shading plate; 11. Connecting plate; 12. Cleaning nozzle; 13. Conveying hose; 1301. Limiting column; 14. Heat dissipation box; 15. Guide slide bar; 16. Reset spring; 17. Metal sheet; 18. Electromagnet; 19. Grounding wire; 20. Inkjet device; 21. Identification camera; 22. Re-inspection camera; 23. Signal transmitter; 24. Smoothing roller; 25. Connecting rod; 26. Connecting spring; 27. Full gear; 28. Half gear; 29. ​​Driven bevel gear; 30. Active bevel gear. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1: Please refer to Figure 1-Figure 3 and Figure 7-Figure 9In order to solve the problem that dust adheres to the surface of copper foil and affects the detection accuracy when the conventional device is in use, the present embodiment provides the following technical solution, which utilizes electrostatic adsorption of dust on the surface of copper foil, and specifically discloses: a support base 1 is horizontally placed on the ground, a detection box 2 is fixedly installed at the middle position of the upper surface of the support base 1, and a control panel 3 is fixedly installed on the side of the detection box 2, a copper foil body 4 to be detected is inserted into the detection box 2, and the copper foil body 4 is rolled up by a winding roller 5, and the winding roller 5 is rotatably installed on the inner side of a mounting frame 6, the mounting frame 6 is fixedly installed on the side of the support base 1, and a guide roller 7 for guiding the copper foil body 4 is rotatably installed on the upper surface of the support base 1, and a matrix light source 8 for emitting light is fixedly installed on the upper surface of the support base 1. , and a photosensitive element 9 for detecting the light source is fixedly installed on the lower surface of the detection box 2, and a shading plate 10 arranged at equal intervals is installed on the front side of the detection box 2. The shading plate 10 is set to be made of soft insulating rubber material. The friction between the shading plate 10 and the copper foil body 4 generates static electricity to absorb dust. An inkjet device 20 for spraying marks is fixedly installed on the inner side wall of the detection box 2, and an identification camera 21 and a re-inspection camera 22 are fixedly installed on the outer surface of the rear side of the detection box 2, and the position of the identification camera 21 corresponds to the position of the inkjet device 20 laterally, and the re-inspection camera 22 is set to a high-definition wide-angle lens, and the re-inspection camera 22 and the identification camera 21 are both electrically connected to a signal transmitter 23 fixedly installed on the upper surface of the detection box 2.

[0042] When using the device, firstly, one end of the copper foil body 4 produced is passed through the interior of the detection box 2 and fixed on the surface of the winding roller 5, and then the motor drives the winding roller 5 to rotate to wind up the copper foil body 4. During the winding process, the copper foil body 4 is transported and contacts and rubs with the lower surface of the shading plate 10. Since the shading plate 10 is made of soft insulating rubber, the static electricity generated by the friction will accumulate in the shading plate 10, so that the dust on the surface of the copper foil body 4 adheres to the surface of the shading plate 10 under the adsorption effect of static electricity, so as to achieve the purpose of cleaning the dust on the surface of the copper foil body 4. While winding, the matrix light source 8 on the upper surface of the supporting base 1 is turned on, and the matrix light source 8 is used to emit The light is irradiated on the copper foil body 4. If the photosensitive element 9 on the lower surface of the detection box 2 detects the light, it means that there is a pinhole in the copper foil body 4. Otherwise, there is no pinhole. When a pinhole is detected, the inkjet device 20 is turned on, and the corresponding number is sprayed on the surface of the copper foil body 4 by the inkjet device 20. Then the copper foil body 4 continues to be transported. When the recognition camera 21 recognizes the number, it is paused and the re-inspection camera 22 is turned on at the same time. The re-inspection camera 22 is used to take a high-definition picture of the corresponding position. Then the picture information is transmitted to the staff's computer through the signal transmitter 23. At this time, the staff retrieves the picture through the computer and enlarges it for careful inspection to achieve the purpose of re-inspection.

[0043] Example 2: Please refer to Figure 4-Figure 6In order to quickly clean the dust on the surface of the shading plate 10 and ensure the subsequent use effect, this embodiment provides the following technical solutions, using a dust cleaning mechanism to clean the surface of the shading plate 10, specifically disclosed: a dust cleaning mechanism for cleaning the dust on the surface is arranged above the shading plate 10, the dust cleaning mechanism includes a connecting plate 11 fixedly installed on the upper end of the shading plate 10 and a dust cleaning nozzle 12 fixedly installed on the outer surface of the connecting plate 11, the lower surface of the shading plate 10 is in contact and friction with the upper surface of the copper foil body 4, and the connecting plate 11 is set to a hollow structure, the connecting plate 11 is fixedly installed with a conveying hose 13 on its upper surface to communicate with the air outlet position of the heat dissipation box 14, and the heat dissipation box 14 is fixedly installed on the upper surface of the detection box 2 Externally, a limiting column 1301 is fixedly installed on the outer surface of the detection box 2, and the middle section of the conveying hose 13 and the limiting column 1301 are squeezed against each other, and the bending angle of the contact position between the conveying hose 13 and the limiting column 1301 exceeds 90 degrees, and a guide slide bar 15 is fixedly installed on the outer surface of the detection box 2 and is slidably connected to the connecting plate 11, and a return spring 16 is provided on the outer end of the guide slide bar 15 and is fixedly installed on the upper surface of the connecting plate 11, an iron metal sheet 17 is fixedly installed on the upper surface of the connecting plate 11, and the position of the metal sheet 17 and the electromagnet 18 fixedly installed on the outer surface of the detection box 2 corresponds to each other up and down, and a grounding wire 19 is fixedly installed on the upper end of the electromagnet 18.

[0044] After the inspection of a roll of copper foil body 4 is completed, the electromagnet 18 is turned on, and the magnetic attraction between the electromagnet 18 and the metal sheet 17 is used to make the connecting plate 11 drive the sunshade 10 to move upward, and finally the electromagnet 18 is in contact with the metal sheet 17. At this time, the static electricity in the sunshade 10 is guided out by the grounding wire 19 above, so that the sunshade 10 loses its adsorption effect on dust. At the same time, due to the upward movement of the connecting plate 11, the conveying hose 13 is separated from the squeezing between the limiting column 1301 (in normal use, the connecting plate 11 pulls the conveying hose 13, so that the conveying hose 13 and the limiting column 1301 are squeezed and bent more than 90 degrees, so that the air inside the conveying hose 13 cannot circulate), at this time, the air from the air outlet of the heat sink 14 can enter the connecting plate 11 through the conveying hose 13, and finally be sprayed out from the dust cleaning nozzle 12, so as to achieve the purpose of cleaning the dust on the surface of the sunshade 10 and ensure the subsequent use effect of the sunshade 10.

[0045] Example 3: Please refer to Fig.10 and Fig.11In order to solve the problem that copper foil wrinkles affect the detection accuracy, the present embodiment provides the following technical solutions, which utilize electrostatic absorption of dust on the surface of the copper foil, and specifically discloses: a smoothing roller 24 is rotatably installed on the front end of the upper surface of the support base 1, and the smoothing roller 24 contacts the upper surface of the copper foil body 4, and a connecting rod 25 rotatably connected to the support base 1 is fixedly installed on the rear end of the smoothing roller 24, and a full gear 27 is coaxially fixedly installed at the lower end of the connecting rod 25, and a connecting spring 26 is fixedly installed between the side of the connecting rod 25 and the upper surface of the support base 1, a half gear 28 is connected to the side of the full gear 27, and a driven bevel gear 29 is coaxially fixedly installed above the half gear 28 to drive it to rotate synchronously, and an active bevel gear 30 is meshedly connected to the side of the driven bevel gear 29 and mutually transmitted thereto, and the active bevel gear 30 is coaxially fixedly installed with one of the guide rollers 7.

[0046] During the transportation of the copper foil body 4, the friction force is used to drive the guide roller 7 to rotate, so that the guide roller 7 drives the active bevel gear 30 to rotate. At this time, the driven bevel gear 29 meshing with the active bevel gear 30 is used to drive the half gear 28 to rotate synchronously. When the half gear 28 is meshed with the full gear 27, it drives the full gear 27 to rotate, so that the full gear 27 drives the smoothing roller 24 to rotate through the connecting rod 25. When the half gear 28 is disengaged from the full gear 27, the connecting rod 25 drives the smoothing roller 24 to reset under the pull of the connecting spring 26, so that the smoothing roller 24 rotates back and forth, so as to achieve the purpose of smoothing the surface of the copper foil body 4 and avoid wrinkles affecting the subsequent detection accuracy.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision copper foil pinhole detection device, comprising a support base (1) placed horizontally on the ground, a detection box (2) fixedly mounted in the middle of the upper surface of the support base (1), and a control panel (3) fixedly mounted on the side of the detection box (2), characterized in that: Also includes: The copper foil body (4) to be inspected is inserted into the inspection box (2), and the copper foil body (4) is rolled up by a winding roller (5), and the winding roller (5) is rotatably mounted on the inner side of a mounting frame (6), and the mounting frame (6) is fixedly mounted on the side of a support base (1), and a guide roller (7) for guiding the copper foil body (4) is rotatably mounted on the upper surface of the support base (1); A matrix light source (8) for emitting light is fixedly mounted on the upper surface of the support base (1), and a photosensitive element (9) for detecting the light source is fixedly mounted on the lower surface of the detection box (2), and shading plates (10) arranged at equal intervals are installed on the front exterior of the detection box (2), the shading plates (10) are made of a soft insulating rubber material, and the friction between the shading plates (10) and the copper foil body (4) generates static electricity to absorb dust, and a dust cleaning mechanism for cleaning dust on the surface of the shading plates (10) is arranged above the shading plates (10); An inkjet device (20) for spraying markings is fixedly installed on the inner side wall of the detection box (2); A smoothing roller (24) is rotatably mounted on the front end of the upper surface of the support base (1), and the smoothing roller (24) is in contact with the upper surface of the copper foil body (4); The dust cleaning mechanism comprises a connecting plate (11) fixedly mounted on the upper end of the shading plate (10) and a dust cleaning nozzle (12) fixedly mounted on the outer surface of the connecting plate (11); the lower surface of the shading plate (10) is in contact and friction with the upper surface of the copper foil body (4), and the connecting plate (11) is configured as a hollow structure; A delivery hose (13) is fixedly mounted on the upper surface of the connection plate (11), and the front end of the delivery hose (13) is in communication with the air outlet position of the heat dissipation box (14), and the heat dissipation box (14) is fixedly mounted on the outside of the upper surface of the detection box (2); A limiting column (1301) is fixedly mounted on the outer surface of the detection box (2), and the middle section of the delivery hose (13) and the limiting column (1301) are pressed against each other, and the bending angle of the contact position between the delivery hose (13) and the limiting column (1301) exceeds 90 degrees; A guide slide bar (15) is fixedly mounted on the outer surface of the detection box (2) and is slidably connected to the connecting plate (11). A return spring (16) is fixedly mounted on the upper surface of the connecting plate (11) and is disposed externally at the upper end of the guide slide bar (15). An iron metal sheet (17) is fixedly mounted on the upper surface of the connecting plate (11), and the metal sheet (17) and an electromagnet (18) fixedly mounted on the outer surface of the detection box (2) correspond to each other in vertical position, and a grounding wire (19) is fixedly mounted on the upper end of the electromagnet (18).

2. A high-precision copper foil pinhole detection device according to claim 1, characterized in that: An identification camera (21) and a re-inspection camera (22) are fixedly mounted on the outer surface of the rear side of the detection box (2), and the position of the identification camera (21) corresponds to the position of the inkjet device (20) in a transverse manner, and the re-inspection camera (22) is configured as a high-definition wide-angle lens, and the re-inspection camera (22) and the identification camera (21) are both electrically connected to a signal transmitter (23) fixedly mounted on the upper surface of the detection box (2).

3. A high-precision copper foil pinhole detection device according to claim 1, characterized in that: A connecting rod (25) rotatably connected to the support base (1) is fixedly mounted on the rear end of the smoothing roller (24), a full gear (27) is coaxially fixedly mounted on the lower end of the connecting rod (25), and a connecting spring (26) is fixedly mounted between the side surface of the connecting rod (25) and the upper surface of the support base (1).

4. A high-precision copper foil pinhole detection device according to claim 3, characterized in that: A half gear (28) is connected to the side of the full gear (27), and a driven bevel gear (29) is coaxially fixedly mounted above the half gear (28) to drive the half gear (28) to rotate synchronously.

5. A high-precision copper foil pinhole detection device according to claim 4, characterized in that: The driven bevel gear (29) is meshedly connected to a side surface thereof with a driving bevel gear (30) for mutual transmission, and the driving bevel gear (30) is coaxially fixedly mounted with one of the guide rollers (7).

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