Film flaw online detecting and cutting device

Abstract

The invention relates to a thin film flaw online detection cutting device which comprises a mounting table, a placing roller rotationally arranged at one end of the mounting table, a winding roller rotationally arranged at the other end of the mounting table and a detection mechanism arranged on the mounting table, and further comprises a cutting device located between the detection mechanism and the winding roller and used for cutting off a thin film when flaws on the thin film are detected; the collecting roller is used for winding the flawed film; the driving rollers are located on the side, facing the cutting device, of the avoiding groove, and a driving space allowing the mounting film to slide in is formed between the two driving rollers; the driving motor is used for driving the driving roller to rotate, and the driving motor is configured to be started when the winding roller stops; the heat sealing device is located between the receding groove and the winding roller and used for conducting heat sealing on the two thin films together. And the pulling device is used for driving the broken end of the film to reach the heat sealing device from the cutting device. The method has the effects of improving the efficiency of detecting the flaws on the surface of the thin film and reducing the complexity of removing the flaws.

Description

Technical Field

[0001] The present application relates to the field of film detection, and in particular to an online film defect detection and cutting device. Background Art

[0002] Packaging composite film undergoes numerous production steps during its production and use. Due to factors such as the production process and the environment, surface defects such as crystal spots, streaks, insect bites, stains, impurities, black spots, pitting, and scratches can easily appear on the film's surface. These defects severely impact the film's appearance and quality, leading to an increased defective rate. This not only causes inconvenience and reduces production efficiency, but can also lead to customer complaints.

[0003] Since packaging composite films are usually produced in an assembly line at a high speed, the surface condition of the film cannot be accurately identified by the traditional naked eye. Based on this, film surface defect detection equipment came into being. Figure 1 , is a schematic diagram of a film surface defect detection device, comprising a placement roller 11 for placing the film raw material, a take-up roller 12 for rewinding the film after inspection, and a detection mechanism 2 located between the placement roller 11 and the take-up roller 12 for detecting film surface defects. The detection mechanism 2 comprises a projection light source 21 located on one side of the film and a linear array CCD camera 22 located on the other side of the film. An encoder for detecting the rotation of the placement roller 11 is mounted on the placement roller 11, and a drive motor 17 for driving the rewinding roller 12 is mounted on the rewinding roller 12. During use, the film to be inspected is directly placed on the placement roller 11 and fixed to the placement roller 11. The free end of the film is passed between the projection light source 21 and the linear array CCD camera 22 and wound around the rewinding roller 12. The rewinding roller 12 is rotated to pull the film off the placement roller 11. When the film passes between the projection light source 21 and the linear array CCD camera 22, the linear array CCD camera 22 will detect the defects on the film, and the encoder installed on the placement roller 11 can record the location of the defect based on the data detected by the encoder during detection, and alarm, so that the staff can promptly cut off the location where the defect appears on the film, remove the defect after cutting off, and bond the broken parts at both ends of the defect together through a heat sealing device.

[0004] However, during the process of cutting and gluing the defective film, the film surface defect detection equipment needs to be stopped. After the workers have glued the cut ends together, the motor needs to be restarted to continue the inspection, resulting in low inspection efficiency. Furthermore, during the film defect inspection process, workers need to wait by the film surface defect detection equipment at all times to manually address the film defects after they are detected, which is very troublesome. Summary of the Invention

[0005] In order to improve the efficiency of detecting defects on the surface of a film and reduce the complexity of removing defect locations, the present application provides a film defect online detection and cutting device.

[0006] The present application provides a film defect online detection and cutting device that adopts the following technical solutions: A film defect online detection and cutting device comprises a mounting platform, a placement roller rotatably connected to one end of the mounting platform, a winding roller rotatably connected to the other end of the mounting platform, and a detection mechanism mounted on the mounting platform, characterized in that it also includes: a cutting device, mounted on the mounting platform and located between the detection mechanism and the winding roller, for cutting the film when the detection mechanism detects a defect on the film and when the detected defect ends; A collecting roller is rotatably connected to the lower side of the mounting platform and is used to rewind the film with defects. The mounting platform is provided with an avoidance groove for the film with defects to reach the collecting roller. A driving roller is provided on the mounting platform and is located between the cutting device and the detection mechanism. Two driving rollers are provided, and a driving space for the mounting film to slide into is formed between the two driving rollers. A driving motor, mounted on the mounting platform, for driving the driving roller to rotate; A heat sealing device is provided on the mounting platform, located between the avoidance groove and the winding roller, and is used to heat seal two sections of film together; The pulling device is arranged on the mounting platform, with one end located between the cutting device and the driving roller and the other end located at the heat sealing device, and is used to drive the free end of the film from the cutting device to the heat sealing device.

[0007] By adopting the above technical solution, during use, the film to be inspected can be placed on the placement roller, and then the empty film tube can be placed on the take-up roller. The free end of the film can be passed through the detection mechanism and wrapped around the film tube on the take-up roller. As the take-up roller rotates and drives the film to be wound around the take-up roller, the detection mechanism will inspect the film passing through the detection mechanism. When a defect is detected on the film, the cutting device will cut the film. At this time, the take-up roller continues to rotate to pull the free end of the film to just below the heat sealing device. The drive roller then conveys the defective film away from the placement roller, allowing the defective film to pass through the avoidance groove and reach the collection roller, where it is collected by the collection roller. When the detection mechanism detects that the defect has disappeared, the film is cut again by the cutting device, so that the defective section of the film is wound on the collection roller. The pulling device also pulls the cut free end of the film to the heat sealing device to achieve a heat-sealed connection of the cut end of the film. It can realize the automatic interception of films with defects without manual processing, realizing fully automated work, greatly improving the efficiency of detecting defects on the film surface and reducing the tediousness of removing the defect location.

[0008] Optionally, the cutting device includes a cutting knife slidably connected to the mounting table and a first linear drive member fixed to the mounting table for driving the cutting knife to move horizontally, and the first linear drive member drives the cutting knife to move along the width direction of the mounting table.

[0009] By adopting the above technical solution, the first linear drive member can drive the cutting knife to slide horizontally along the width direction of the mounting platform, thereby achieving the work of separating the film.

[0010] Optionally, the collecting roller is provided with a fixing device for fixing the position of the free end of the film on the collecting roller, and the fixing device includes a fixing plate slidably connected to the collecting roller, and a fixed space is formed between the fixing plate and the collecting roller for the free end of the film to slide into.

[0011] By adopting the above technical solution, when the free end of the film falls from the avoidance groove, it will reach the fixed space. By operating the fixed plate to slide relative to the collecting roller, the free end of the film can be clamped between the fixed plate and the collecting roller, thereby fixing the position of the film on the collecting roller, making it easier to wrap the film smoothly around the collecting roller when the collecting roller is rotated.

[0012] Optionally, the fixing device further includes a first driving member for driving the fixing plate to move radially along the collecting roller to open or close the fixing space, and a second driving member for driving the fixing plate to move axially along the collecting roller.

[0013] By adopting this technical solution, the first drive member can control the opening and closing of the fixed space to secure the film within the fixed space. After the defective film is wound onto the collection roller, the second drive member is directly used to axially move the fixed plate away from the film. The first drive member then controls the opening of the fixed space, and the second drive member drives the fixed plate in the opposite direction to reset it, thus forming a fixed space ready for the next section of film to be slid into.

[0014] Optionally, a mounting ring is slidably connected to the collecting roller, and a mounting groove is provided on the inner wall of the mounting ring. The first driving member includes a sliding block slidably connected in the mounting groove and fixed to the fixed plate, an abutment spring fixed between the bottom of the mounting groove and the sliding block, and a first electromagnet fixed to the bottom of the mounting groove.

[0015] By adopting the above technical solution, under normal conditions, the elastic force of the abutment spring can cause the abutment plate to adhere to the collecting roller, and the fixed space is closed. When the fixed space needs to be opened, the first electromagnet is directly energized to attract the sliding block through the first electromagnet. At this time, the sliding block presses the abutment spring in a direction away from the collecting roller, thereby opening the fixed space.

[0016] Optionally, the second driving member includes a driving linear motor fixed to the mounting table and a driving rod fixed to the slider of the driving linear motor. A sliding groove for the driving rod to be embedded and slide is provided on the outer wall of the mounting ring. The length direction of the driving linear motor is consistent with the length direction of the collecting roller.

[0017] By adopting this technical solution, when the collection roller rotates, the mounting ring also rotates, and the driving rod also slides within the chute. When the stator needs to be extracted from the film, the linear motor can be directly activated to drive the mounting ring horizontally via the driving rod. The mounting ring also drives the stator horizontally, thereby extracting the stator from the film.

[0018] Optionally, a first positioning device is provided between the mounting ring and the mounting platform for fixing the fixed space below the avoidance groove, the first positioning device includes a first infrared emitter fixed to the outer wall of the mounting ring and a first infrared receiver fixed to the mounting platform for receiving the signal emitted by the first infrared emitter, when the collecting roller rotates to the fixed space below the avoidance groove, the first infrared receiver receives the signal emitted by the first infrared emitter.

[0019] By adopting the above technical solution, the fixed space is always located below the avoidance groove under normal conditions, so that the film with defects can automatically fall into the fixed space under the action of gravity.

[0020] Optionally, two pulling devices are provided, and the two pulling devices are respectively located on both sides of the mounting platform, one end of the pulling device is located between the driving roller and the cutting knife, and the other end is located at the heat sealing device, and the cutting knife is slidably connected between the two pulling devices, and a lifting component for driving the cutting knife to rise and fall is provided on the mounting platform.

[0021] By adopting the above technical solution, both sides of the film can be pulled at the same time, and the cutter can also slide between the two pulling devices when the pulling device is not used. When the pulling device is needed, the cutter can be directly lifted by the lifting assembly.

[0022] Optionally, the pulling device includes a clamp for clamping a side edge of the film, a control member for controlling the opening or closing of the clamp, and a second linear drive member for driving the clamp to move along the length direction of the mounting platform.

[0023] By adopting the above technical solution, the clamp can be controlled to open or close through the control member to clamp or release the film. When the clamp is clamped on the film, the second linear drive member drives the clamp to move, thereby pulling the film.

[0024] Optionally, the second linear drive member includes a second linear motor fixedly connected to the mounting table, the clamp includes a first plate fixedly connected to a slider of the second linear motor, a second plate hinged to the first plate, and a torsion spring sleeved on a hinge axis between the first plate and the second plate, and the control member is located between the first plate and the second plate and on a side of the torsion spring facing the second linear motor; The control component includes a second electromagnet fixedly connected to a side of the first plate facing the second plate and an iron sheet fixedly connected to a side of the second plate facing the first plate.

[0025] By adopting the above technical solution, under normal conditions, under the action of the torsion spring, the film is clamped between the first plate and the second plate. When the second electromagnet is energized, the second electromagnet attracts the iron sheet to move closer to the second electromagnet, thereby driving the fixed space to open, and the operation is very flexible.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The arrangement of the cutting device and the collecting roller enables the defective film to be directly cut when a defect is detected on the film, and the defective film is collected by the collecting roller. The arrangement of the pulling device and the heat-sealing device enables the free end of the film to be pulled to the lower side of the heat-sealing device after the defective film is removed by the pulling device, and the two film sections are connected together by the heat-sealing device to form a complete film, so that the film finally wound on the winding roller is a complete film. 2. The fixing device is provided so that the free end of the film reaching the collecting roller can be fixed on the collecting roller through the fixing device, so that the collecting roller can wind the film; 3. The setting of the second electromagnet makes it possible to automatically control the opening and closing of the clamp through the second electromagnet, thereby realizing fully automated operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram designed to illustrate the principle of existing thin film surface defect detection equipment in the background technology.

[0028] Figure 2 It is a schematic diagram of the overall structure of this application.

[0029] Figure 3 It is a main cutaway schematic diagram of this application.

[0030] Figure 4 This is a schematic diagram to illustrate the structure of the fixture.

[0031] Figure 5 This is a schematic diagram designed to illustrate the structure of the first driving member.

[0032] Figure 6 This is a schematic diagram to illustrate the structure of the pulling device.

[0033] Explanation of reference numerals: 1. mounting platform; 11. placement roller; 12. winding roller; 121. winding shaft; 122. winding motor; 13. collecting roller; 14. collecting motor; 15. avoidance groove; 16. driving roller; 17. driving motor; 18. mounting frame; 2. detection mechanism; 21. projection light source; 22. linear array CCD camera; 3. cutting device; 31. cutting knife; 32. first linear driving member; 33. lifting assembly; 331. lifting motor; 332. screw rod; 4. fixing device; 41. fixing plate; 42. first driving member; 421. sliding block; 422. abutting spring; 423. first electromagnet; 43 , second driving member; 431, driving linear motor; 432, driving rod; 44, mounting ring; 441, mounting groove; 442, connecting groove; 443, sliding groove; 5, first positioning device; 51, first infrared emitter; 52, first infrared receiver; 6, heat sealing device; 61, bracket; 62, heat sealing knife; 63, cylinder; 7, pulling device; 71, clamp; 711, first plate; 712, second plate; 713, torsion spring; 72, control member; 721, second electromagnet; 722, iron sheet; 73, second linear driving member; 8, second positioning device; 81, second infrared emitter; 82, second infrared receiver. DETAILED DESCRIPTION

[0034] The following is combined with Figure 2-6 This application is described in further detail.

[0035] The embodiment of the present application discloses a film defect online detection and cutting device. Figure 1 The film defect online detection and cutting device includes a mounting platform 1, a placement roller 11 rotatably connected to one end of the mounting platform 1, a take-up roller 12 rotatably connected to the other end of the mounting platform 1, and a detection mechanism 2 mounted on the mounting platform 1. The take-up roller 12 includes a take-up shaft 121 rotatably connected to the mounting platform 1 and a take-up motor 122 fixed to the mounting platform 1 for rotating the take-up roller 12. The detection mechanism 2 includes a projection light source 21 mounted on the mounting platform 1 and a linear array CCD camera 22 mounted on the upper side of the mounting platform 1. A detection space for the film to pass through is formed between the projection light source 21 and the linear array CCD camera 22. During use, the film to be inspected is directly mounted on the placement roller 11, and another empty film drum to be wound is mounted on the take-up shaft 121. The free end of the film is passed through the inspection space and wound around the film drum of the take-up shaft 121. The take-up motor 122 is then started, which drives the take-up shaft 121 to rotate, thereby pulling the film out of the placement roller 11 and onto the film drum wound on the take-up shaft 121. While the film is being unwound from the placement roller 11 and wound around the take-up roller 12, the inspection mechanism 2 inspects the film surface for defects, etc.

[0036] Reference Figure 2and Figure 3 The mounting platform 1 is also provided with a cutting device 3 for cutting the film after the detection mechanism 2 detects a defect in the film. The cutting device 3 is located on the side of the detection mechanism 2 facing the reel 121. Specifically, the cutting device 3 includes a cutter 31 slidably connected to the mounting platform 1 and a first linear drive member 32 fixed to the mounting platform 1 for driving the cutter 31 to move horizontally. The length direction of the first linear drive member 32 is consistent with the width direction of the mounting platform 1, thereby driving the cutter 31 to slide along the width direction of the mounting platform 1. Under normal circumstances, the cutter 31 is located on one side of the film. When the detection mechanism 2 detects a defect on the film, the first linear drive member 32 drives the cutter 31 to slide from one side of the film to the other side of the film, thereby cutting the film, so that the film is divided into a winding section wound on the reel 12 and a pay-out section wound on the placement roller 11.

[0037] The first linear drive member 32 can be a linear motor. At the same time, a collecting roller 13 for collecting defective films and a collecting motor 14 for driving the collecting roller 13 to rotate are also provided on the mounting platform 1 (refer to FIG. Figure 4 The collecting roller 13 is located on the lower side of the working surface of the mounting platform 1, and an escape groove 15 is provided on the mounting platform 1 for the defective film to fall onto the collecting roller 13. After the film is cut by the cutting knife 31, it can fall from the escape groove 15 to the collecting roller 13 under the action of gravity, and the defective film is collected by the collecting roller 13.

[0038] Furthermore, a drive roller 16 is installed on the workbench to drive the cut film (the free end of the payout section) forward. This drive roller 16 is located between the cutting device 3 and the detection mechanism 2. Two drive rollers 16 are provided, each positioned vertically. A drive space is formed between the two drive rollers 16 for the film to slide into. A drive motor 17 is fixed to the mounting platform 1 to rotate the drive rollers 16. Under normal conditions, the film is driven by the winding roller 12. At this point, the drive motor 17 stops, causing the film to move, thereby rotating the drive rollers 16. This ensures greater tension in the film between the drive rollers 16 and the winding roller 12, making it easier for the cutter 31 to cut the tensioned film. When the first linear drive member 32 drives the cutter 31 to slide from one side of the film to the other side to cut the film, the drive motor starts, thereby driving the driving roller 16 to rotate, thereby transporting the free end of the film release segment located in the driving space in the direction away from the placement roller 11 until the free end of the film release segment falls into the avoidance groove 15 under the action of gravity and is wound around the collecting roller 13.

[0039] Reference Figure 3 A fixing device 4 for fixing the free end of the film on the collecting roller 13 is provided on the collecting roller 13 to ensure that the free end of the film reaching the collecting roller 13 can be smoothly wound on the collecting roller 13.

[0040] Reference Figure 4 and Figure 5 The fixing device 4 includes a fixing plate 41 that is slidably connected to the collection roller 13, a first driving member 42 that drives the fixing plate 41 to slide radially, and a second driving member 43 for driving the fixing plate 41 to slide axially. The fixing plate 41 is generally arc-shaped and fits on the collection roller 13. The first driving member 42 can drive the fixing plate 41 to move radially so that a fixed space for the film to be embedded is formed between the fixing plate 41 and the collection roller 13. When the film falls into the fixed space, the first driving member 42 is operated to drive the fixing plate 41 to fit on the collection roller 13, thereby fixing the free end of the film release section on the collection roller 13. At this time, the collection motor 14 drives the collection roller 13 to rotate, and the defective film can be wound around the collection roller 13. When the winding is completed, the second driving member 43 drives the fixing plate 41 to move axially, and the fixing plate 41 can be pulled out from the wound film, and then the first driving member 42 drives the fixing plate 41 to move in the direction away from the driving roller 16, so that the fixed space can be opened. Finally, the second driving member 43 drives the fixing plate 41 to move in the opposite direction along the length direction of the driving roller 16 to achieve reset, and then you can wait for the next section of film to arrive in the fixed space so as to rewind the next section of film.

[0041] The collecting roller 13 is provided with a mounting ring 44 that is slidably engaged with the collecting roller 13. A mounting groove 441 is defined on the inner wall of the mounting ring 44. The mounting groove 441 is connected to the side of the mounting ring 44 that faces the fixing plate 41. The first driving member 42 includes a sliding block 421 that is slidably connected within the mounting groove 441 and fixed to the fixing plate 41, an abutting spring 422 fixed between the bottom of the mounting groove 441 and the sliding block 421, and a first electromagnet 423 fixed to the bottom of the mounting groove 441. Under normal conditions, the fixing plate 41 is affixed to the collecting roller 13 under the elastic force of the abutting spring 422. When the fixed space needs to be opened, the first electromagnet 423 is directly controlled to be energized, and the first electromagnet 423 attracts the sliding block 421 toward the first electromagnet 423, causing the sliding block 421 to squeeze the abutting spring 422, thereby opening the fixed space between the fixing plate 41 and the collecting roller 13.

[0042] Reference Figure 4 and Figure 5A T-shaped slot 443 is defined on the outer wall of the mounting ring 44. The second drive member 43 comprises a linear drive motor 431 fixedly connected to the mounting platform 1 and a T-shaped drive rod 432 fixedly connected to the slider of the linear drive motor 431. The drive rod 432 fits snugly within the slot 443. This allows the mounting ring 44 to rotate synchronously with the roller 16 when the drive motor 17 rotates, while the drive rod 432 also slides within the slot 443. When the linear drive motor 431 is activated, the drive rod 432 cooperates with the slot 443 to drive the mounting ring 44 axially, thereby driving the fixing plate 41 to slide axially along the roller 16.

[0043] In order to ensure that the fixed space is located directly below the avoidance groove 15 under normal conditions, so that the free end of the film release section can smoothly fall from the avoidance groove 15 into the fixed space, a first positioning device 5 is provided between the outer wall of the mounting ring 44 and the mounting platform 1. The first positioning device 5 includes a first infrared transmitter 51 fixedly connected to the outer wall of the mounting ring 44 and a first infrared receiver 52 fixedly connected to the mounting platform 1 for receiving the signal emitted by the first infrared transmitter 51. The first infrared transmitter 51 and the fixing plate 41 are located on the same radius line of the mounting ring 44, so that when the first infrared receiver 52 receives the signal emitted by the first infrared transmitter 51, the fixed space is located directly below the avoidance groove 15.

[0044] When the detection mechanism 2 detects that the defect on the film disappears, the first linear drive member 32 will drive the cutter 31 to move in the opposite direction to cut the film. At this time, the driving roller 16 will wind the remaining film on the driving roller 16. After the first linear drive member 32 drives the cutter 31 to move in the opposite direction, the collecting roller 13 rotates a set number of circles and the first infrared receiver 52 receives the signal from the first infrared transmitter 51, the collecting motor 14 stops, so that the cut section of the defective film is completely wound around the collecting roller 13. At the same time, the fixed space can be located directly below the avoidance groove 15 when the collecting roller 13 stops, so that the next section of the film can smoothly reach the fixed space.

[0045] It can be understood that an encoder for counting the number of rotations of the collecting roller 13 is fixedly connected to the collecting roller 13, and the detection mechanism 2, the first linear drive, the driving motor 17, the collecting motor 14, the encoder, and the infrared radiation device are all connected to the PLC controller to realize automatic detection, cutting and collection of the film through the PLC controller.

[0046] Reference Figure 2 and Figure 3 A heat sealing device 6 for heat sealing two sections of film and a pulling device 7 for driving the free end of the film release section to the heat sealing device 6 are also provided on the mounting platform 1.

[0047] After the cutter 31 moves once to cut the film to form a winding section and a pay-out section, the winding roller 12 will pull the free end of the winding section to the heat sealing device 6. After the cutter 31 reciprocates once to cut the film with defects and the film with defects is wound on the collecting roller 13, the free end of the pay-out section will be located at the cutter 31. At this time, the free end of the pay-out section can be pulled to the heat sealing device 6 by the pulling device 7, so that the free end of the winding section and the free end of the pay-out section are bonded together by the heat sealing device 6, thereby connecting the film wound on the placement roller 11 and the film wound on the winding roller 12.

[0048] Two pulling devices 7 are provided, and the two pulling devices 7 are respectively located on both sides of the mounting platform 1 to pull both sides of the free end of the film release section.

[0049] Reference Figure 6 The pulling device 7 includes a clamp 71 for clamping the side of the film, a control member 72 for controlling the opening or closing of the clamp 71, and a second linear drive member 73 for driving the clamp 71 to move along the length direction of the mounting platform 1. The second linear drive member 73 can be a linear motor. The second linear drive member 73 is fixed to one side of the mounting platform 1, and one end of the second linear drive member 73 is located between the cutter 31 and the driving roller 16, and the other end is located on one side of the heat sealing device 6, so as to pull the film between the cutter 31 and the driving roller 16 to the heat sealing device 6. The cutter 31 slides between the two second linear drives 73, and a lifting assembly 33 is provided on the mounting platform 1 to drive the cutter 31 to slide vertically to prevent the movement of the clamp 71 from interfering with the cutter 31.

[0050] Specifically, refer to Figure 2 A mounting frame 18 is fixedly connected to the mounting platform 1. A first linear drive member 32 is vertically slidably connected to the mounting frame 18. The lifting assembly 33 includes a lifting motor 331 fixedly connected to the mounting platform 1 and a screw rod 332 fixedly connected to the output shaft of the lifting motor 331. The first linear drive member 32 is threadedly connected to the screw rod 332. When the lifting motor 331 is activated, the output shaft of the lifting motor 331 drives the screw rod 332 to rotate, thereby driving the first linear drive member 32, which is threadedly connected to the screw rod 332, to rise and fall. Under normal circumstances, the lifting assembly 33 drives the cutter 31 above the clamp 71. When the detection mechanism 2 detects a defect in the film, the cutter 31 is lowered and the first linear drive member 32 drives the cutter 31 to slide horizontally to cut the film. When the detection mechanism 2 detects that the defect has disappeared, the first linear drive member 32 drives the cutter 31 to move horizontally to return, and finally, the lifting assembly 33 drives the cutter 31 to rise. Then the control member 72 controls the clamp 71 to close so as to clamp the side of the film through the clamp 71 , and the second linear drive member 73 drives the clamp 71 toward the heat sealing device 6 so as to pull the film to the heat sealing device 6 through the clamp 71 .

[0051] Reference Figure 6 The clamp 71 includes a first plate 711 fixed to the linear motor slider of the second linear drive member 73, a second plate 712 hinged to the first plate 711, and a torsion spring 713 sleeved on the hinge axis between the first and second plates 711, 712. An opening for clamping the film is formed on the side of the first and second plates 711, 712 away from the second linear drive member 73. Under normal conditions, the elastic force of the torsion spring 713 closes the opening formed by the first and second plates 711, 712 to clamp the film.

[0052] The control member 72 is located between the first plate 711 and the second plate 712, on the side of the hinge axis between the first and second plates 711, 712 facing the second linear drive member 73. The control member 72 includes a second electromagnet 721 fixedly attached to the side of the first plate 711 facing the second plate 712, and an iron sheet 722 fixedly attached to the side of the second plate 712 facing the first plate 711. When the clamp 71 needs to be opened, the second electromagnet 721 is directly energized, which attracts the iron sheet 722, thereby moving the first and second plates 711, 712, away from the opening, closer together, thereby opening the clamp 71.

[0053] Normally, clamp 71 is open, and the film is positioned within and slides through the opening of clamp 71. When a defective section of film is removed and the free ends of the payout and takeup sections need to be bonded together, second electromagnet 721 is de-energized, allowing first plate 711 and second plate 712 to clamp the film under the action of torsion spring 713, thereby driving the film toward heat-sealing device 6.

[0054] Reference Figure 2 and Figure 3 A second positioning device 8 is also provided on the mounting platform 1 for detecting whether the free end of the unwinding section and the free end of the winding section have reached the lower side of the heat sealing device 6 .

[0055] The heat sealing device 6 includes a bracket 61 fixed to the mounting platform 1, a heat sealing knife 62 vertically slidably connected to the bracket 61, and a cylinder 63 for driving the heat sealing knife 62 to move vertically. The cylinder 63 can drive the heat sealing knife 62 to move vertically, thereby achieving heat-melting connection of two film sections by the heat sealing knife 62. The heat sealing device 6 can be a commercially available heat sealing machine, as long as it can heat-seal two film sections. The detailed structure and principle will not be described in detail in this application.

[0056] The second positioning device 8 is located on the side of the heat sealing blade 62 facing the cutting blade 31. It comprises a second infrared emitter 81 fixed to the mounting platform 1 and a second infrared receiver 82 fixed to the bracket 61. Under normal circumstances, the second infrared receiver 82 receives signals from the second infrared emitter 81. During film inspection, the film blocks the signals from the infrared signal emitter. When the inspection mechanism 2 detects a defect in the film, the cutting blade 31 cuts the film. The rewinding roller 12 then continues to move the free end of the rewinding section until it passes the second infrared emitter 81. The signal from the second infrared emitter 81 is then received by the second infrared receiver 82, at which point the rewinding motor 122 stops, and the free end of the rewinding section is positioned directly below the heat sealing device 6. When the pulling device 7 pulls the free end of the film's payout section to the second positioning device 8, the film blocks the signals from the second infrared emitter 81 to the second infrared receiver 82. The second linear drive member 73 continues to slide for a set period of time before stopping, thereby pulling the free end of the payout section directly below the heat sealing device 6. At this time, the heat sealing device 6 starts to heat seal the two sections of film, and after the heat sealing is completed, the winding roller 12 starts to continue to wind the film.

[0057] Among them, the second positioning device 8, the pulling device 7 and the heat sealing device 6 are also connected to the PLC controller to achieve automated operation.

[0058] The implementation principle of the film defect online detection and cutting device of the embodiment of the present application is as follows: before use, an empty film cylinder is first installed on the winding shaft 121 and the collection shaft, and then the film to be inspected is placed on the placement roller 11 and fixed to the placement roller 11. The free end of the film is then passed between the projection light source 21 and the linear array CCD camera 22 and wound around the film cylinder of the winding roller 12. The winding motor 122 is then started, and the winding roller 12 is driven to rotate by the winding motor 122, thereby pulling the film to be wound around the winding roller 12. At this time, the detection mechanism 2 also detects whether there are defects on the film. When the detection mechanism 2 detects defects on the film, it controls the lifting assembly 33 to descend so that the cutter 31 descends to one side of the film, and then the first linear drive member 32 drives the cutter 31 to slide horizontally, thereby cutting the film. At this point, the winding motor 122 drives the free end of the winding section to directly below the heat-sealing device 6, while simultaneously driving the motor 17 to rotate the drive roller 16, thereby sliding the free end of the payout section away from the placement roller 11. Under the action of gravity, the free end of the payout section falls from the escape groove 15 into the fixed space. Next, the first electromagnet 423 is de-energized, and the fixed plate 41 engages the film cylinder on the collection roller 13, thereby clamping the defective film end between the fixed plate 41 and the collection roller 13. The collection motor 14 then activates, rotating the collection roller 13, wrapping the defective film around it until the detection mechanism 2 detects that the defect has disappeared. At this point, the first linear drive 32 controls the cutter 31 to reverse direction, severing the film. Simultaneously, a timer within the PLC controller begins counting. When the timer reaches the set value and the first infrared receiver 52 receives a signal from the first infrared transmitter 51, the collection motor 14 stops. Next, the second drive member 43 drives the fixed plate 41 along the axis of the collection roller 13, thereby sliding the fixed plate 41 out of the film. The first electromagnet 423 is energized to attract the sliding block 421, opening the fixed space between the fixed plate 41 and the collection roller 13, allowing the next section of film to slide into the fixed space. Simultaneously, the second magnet is de-energized, causing the clamps 71 to clamp onto both sides of the film. The second linear drive member 73 drives the clamps 71 toward the heat sealing device 6 until the film blocks the signal transmitted from the second infrared transmitter 81 to the second infrared receiver 82. At this point, a timer within the PLC controller begins counting. When the timer reaches the set value, the second linear drive member 73 stops, causing the free end of the unwinding section to reach directly below the heat sealing device 6. Finally, the heat sealing device 6 is activated to heat-seal the two sections of film together, and the winding motor 122 is then activated to continue winding the film. This achieves fully automated film inspection and cutting, eliminating the need for personnel to stop the machine to cut films with defects, significantly improving inspection efficiency and reducing labor costs.

[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A film defect online detection and cutting device, comprising a mounting platform (1), a placing roller (11) rotatably connected to one end of the mounting platform (1), a winding roller (12) rotatably connected to the other end of the mounting platform (1), and a detection mechanism (2) mounted on the mounting platform (1), characterized in that: Also includes: a cutting device (3), mounted on the mounting platform (1) and located between the detection mechanism (2) and the winding roller (12), for cutting the film when the detection mechanism (2) detects a defect on the film and when the detected defect ends; A collecting roller (13) is rotatably connected to the lower side of the mounting platform (1) and is used to roll up the film with defects. The mounting platform (1) is provided with an avoidance groove (15) for the film with defects to reach the collecting roller (13); A driving roller (16) is provided on the mounting platform (1) and is located between the cutting device (3) and the detection mechanism (2). Two driving rollers (16) are provided, and a driving space for the mounting film to slide into is formed between the two driving rollers (16); A driving motor (17) is mounted on the mounting platform (1) and is used to drive the driving roller (16) to rotate; A heat-sealing device (6) is provided on the mounting platform (1) and is located between the avoidance groove (15) and the winding roller (12), and is used for heat-sealing two sections of film together; A pulling device (7) is arranged on the mounting platform (1), with one end located between the cutting device (3) and the driving roller (16), and the other end located at the heat sealing device (6), and is used to drive the free end of the film from the cutting device (3) to the heat sealing device (6).

2. The film defect online detection and cutting device according to claim 1, characterized in that: The cutting device (3) comprises a cutting knife (31) slidably connected to the mounting platform (1) and a first linear drive member (32) fixed to the mounting platform (1) for driving the cutting knife (31) to move horizontally, wherein the first linear drive member (32) drives the cutting knife (31) to move along the width direction of the mounting platform (1).

3. The film defect online detection and cutting device according to claim 1, characterized in that: The collecting roller (13) is provided with a fixing device (4) for fixing the position of the free end of the film on the collecting roller (13), and the fixing device (4) includes a fixing plate (41) slidably connected to the collecting roller (13), and a fixed space for the free end of the film to slide into is formed between the fixing plate (41) and the collecting roller (13).

4. The film defect online detection and cutting device according to claim 3, characterized in that: The fixing device (4) further comprises a first driving member (42) for driving the fixing plate (41) to move radially along the collecting roller (13) to open or close the fixing space, and a second driving member (43) for driving the fixing plate (41) to move axially along the collecting roller (13).

5. The film defect online detection and cutting device according to claim 4, characterized in that: The collecting roller (13) is slidably connected to a mounting ring (44), an inner wall of which is provided with a mounting groove (441), and the first driving member (42) comprises a sliding block (421) slidably connected to the mounting groove (441) and fixed to the fixing plate (41), an abutting spring (422) fixed between the bottom of the mounting groove (441) and the sliding block (421), and a first electromagnet (423) fixed to the bottom of the mounting groove (441).

6. The film defect online detection and cutting device according to claim 5, characterized in that: The second driving member (43) includes a driving linear motor (431) fixedly connected to the mounting platform (1) and a driving rod (432) fixedly connected to a slider of the driving linear motor (431); a sliding groove (443) for the driving rod (432) to be embedded and slide is provided on the outer wall of the mounting ring (44); and the length direction of the driving linear motor (431) is consistent with the length direction of the collecting roller (13).

7. The film defect online detection and cutting device according to claim 5, characterized in that: A first positioning device (5) is provided between the mounting ring (44) and the mounting platform (1) for fixing the fixed space to be located below the avoidance groove (15). The first positioning device (5) comprises a first infrared transmitter (51) fixedly connected to the outer wall of the mounting ring (44) and a first infrared receiver (52) fixedly connected to the mounting platform (1) for receiving a signal emitted by the first infrared transmitter (51). When the collecting roller (13) rotates to the point where the fixed space is located below the avoidance groove (15), the first infrared receiver (52) receives the signal emitted by the first infrared transmitter (51).

8. The film defect online detection and cutting device according to claim 2, characterized in that: There are two pulling devices (7), and the two pulling devices (7) are respectively located on both sides of the mounting platform (1). One end of the pulling device (7) is located between the driving roller (16) and the cutting knife (31), and the other end is located at the heat sealing device (6). The cutting knife (31) is slidably connected between the two pulling devices (7). A lifting component (33) for driving the cutting knife (31) to rise and fall is provided on the mounting platform (1).

9. The film defect online detection and cutting device according to claim 8, characterized in that: The pulling device (7) comprises a clamp (71) for clamping the side edge of the film, a control member (72) for controlling the opening or closing of the clamp (71), and a second linear drive member (73) for driving the clamp (71) to move along the length direction of the mounting platform (1).

10. The film defect online detection and cutting device according to claim 9, characterized in that: The second linear drive member (73) includes a second linear motor fixedly connected to the mounting platform (1); the clamp (71) includes a first plate (711) fixedly connected to the slider of the second linear motor, a second plate (712) hinged on the first plate (711), and a torsion spring (713) sleeved on the hinge axis of the first plate (711) and the second plate (712); the control member (72) is located between the first plate (711) and the second plate (712) and on the side of the torsion spring (713) facing the second linear motor; The control member (72) comprises a second electromagnet (721) fixedly connected to the side of the first plate (711) facing the second plate (712) and an iron sheet (722) fixedly connected to the side of the second plate (712) facing the first plate (711).

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