Surface laminating device and method for laser anti-counterfeit label production

Abstract

The invention belongs to the technical field of label film covering, and particularly relates to a laser anti-counterfeit label production surface film covering device and method.The laser anti-counterfeit label production surface film covering device comprises a rack, a discharging module, a film covering module, a detecting module and a receiving module; the discharging module comprises a first rotating shaft, and the receiving module comprises a second rotating shaft. The film covering module comprises a heating plate and a bearing plate; the detection module comprises a guide roller I, a clamping mechanism and an adsorption mechanism, and when the guide roller I moves to a preset position along a preset track, the tension of the label paper and the film wound on the guide roller I is zero; the clamping mechanism comprises a first clamping plate located between the heating plate and the first guide roller, and preset tension is kept on the film and the label paper between the first clamping plate and the first rotating shaft; the adsorption mechanism comprises a first adsorption opening and a second adsorption opening, and the label paper and the film can move in the opposite directions perpendicular to the axis of the first guide roller. According to the invention, the obvious appearance deformation condition that the label paper and the film are not bonded but have no bubbles or wrinkles and the like can be detected.

Description

Technical Field

[0001] The invention belongs to the technical field of label laminating, and in particular relates to a surface laminating device and method for producing laser anti-counterfeiting labels. Background Art

[0002] Lamination is an important step to ensure that laser anti-counterfeiting labels maintain their functionality and aesthetics during transportation, storage and use. It can provide an extra layer of protection for laser anti-counterfeiting labels to protect them from physical damage such as scratches. At the same time, it improves the water resistance and corrosion resistance of the labels, allowing them to remain stable in harsh environments and not easily damaged by contact with moisture or chemicals.

[0003] During the laminating process, due to impurities on the surface of the label paper or film or insufficient laminating pressure, the film may not be adhered to the label paper. In this case, the machine needs to be stopped in time to replace the label paper and film or to repair the device. In the prior art, the roll is usually removed after the lamination and winding are completed, and an adhesion test is performed in a laboratory or a special testing area. However, it is impossible to detect in time that the film is not adhered to the label paper, resulting in a large number of products needing to be reworked or scrapped, increasing production costs.

[0004] The Chinese patent document with announcement number CN205526964U discloses an anti-counterfeiting logistics label laminating device. The covering film and the anti-counterfeiting label are pressed into a laminating label after passing through a pressurizing device. The laminating label passes through a displacement sensor, a photoelectric detection sensor, a cutting device and a collecting device, and finally enters a packaging device. When the photoelectric detection sensor detects that the laminating label has bubbles, the alarm light and the tweeter start working, and the secondary pressurizing device works at the same time, eliminating the manual detection link. In the actual production process, there are situations where the label paper and the film are not bonded and there are bubbles, such as large particles of dust on the surface of the label paper or the film, resulting in the inability to bond between the label paper and the film. There are also situations where the label paper or the film is not bonded but there are no bubbles or wrinkles and other obvious deformations in appearance. For example, the laminating pressure and laminating temperature are not enough. The above patent can only detect laminating labels with bubbles, and cannot detect situations where the label paper and the film are not bonded but there are no bubbles or wrinkles and other obvious deformations in appearance. Summary of the invention

[0005] The present invention provides a surface laminating device and method for producing laser anti-counterfeiting labels, so as to solve the technical problem that during the operation of the device, it is impossible to detect the situation that there is no obvious appearance deformation such as bubbles or wrinkles between the label paper and the film but no adhesion.

[0006] To solve the above problems, the present invention adopts the following technical solutions: A surface laminating device for producing laser anti-counterfeiting labels comprises a frame, on which a feeding module, a laminating module, a detection module and a receiving module are sequentially mounted along the conveying direction of label paper and film; the feeding module comprises a rotating shaft 1 for releasing the film and label paper, and the receiving module comprises a rotating shaft 2 for rolling up the film and label paper, and a predetermined tension exists on the film and label paper between the rotating shaft 1 and the rotating shaft 2; the laminating module comprises a heating plate and a supporting plate, and the heating plate and the supporting plate are close to each other to heat the film and stick it on the label paper; the detection module comprises a guide roller 1, a clamping mechanism and an adsorption mechanism, the guide roller 1 is slidably mounted on the frame along a direction perpendicular to the axis of the guide roller 1, and the guide roller 1 moves along a predetermined trajectory to a predetermined position When the stacked and laminated label paper and film are wound around the guide roller one, a predetermined pressure is maintained. When the guide roller one moves to a position outside the predetermined position, the tension of the label paper and film wound around the guide roller one is zero. The clamping mechanism includes two clamping plates one located between the heating plate and the guide roller one. The two clamping plates one are close to each other to fix the film and label paper between the clamping plates one, so that the film and label paper between the clamping plates one and the rotating shaft one maintain a predetermined tension. The adsorption mechanism includes an adsorption component one with an adsorption port one and an adsorption component two with an adsorption port two. The adsorption port one and the adsorption port two are located on both sides of the label paper and film with zero tension and output adsorption force, so that the label paper and film move in opposite directions perpendicular to the axis of the guide roller one.

[0007] The guide roller 1 can move along a predetermined trajectory so that the tension of the label paper and the film wound on the guide roller 1 is zero. At this time, the suction port 1 and the suction port 2 can suction the film and the label paper in opposite directions. If the film is not bonded to the label paper, no matter whether there are bubbles between the label paper and the film, the user can observe that the film and the label paper are separated from each other and stop the device in time; when the suction port 1 and the suction port 2 cannot separate the film and the label paper, the guide roller 1 returns to the predetermined position, and the device continues to run, and the laminated label paper can be inspected at any time without waiting for the winding to be completed; during the inspection process, the clamping plate 1 fixes the label paper and the film between the clamping plate 1, and there is always a predetermined tension on the film and the label paper between the rotating shaft 1 and the clamping plate 1. The inspection process does not affect the lamination and cooling process, thereby ensuring the flatness of the film and the label paper, helping the film to be evenly bonded to the label paper, reducing bubbles, and at the same time ensuring that the temperature on the film and the label paper drops evenly to avoid material deformation or stress concentration caused by local temperature differences.

[0008] Furthermore, the clamping mechanism includes two clamping plates 2 located between the rotating shaft 2 and the guide roller 1. The two clamping plates 2 are close to each other to fix the film and label paper between the clamping plates 2, so that the film and label paper maintain a predetermined tension between the clamping plates 2 and the rotating shaft 2.

[0009] The setting of the second clamping plate ensures that there is always a predetermined tension between the second clamping plate and the second rotating shaft on the film and the label paper, thereby avoiding wrinkles or looseness of the film and the label paper during the winding process and ensuring the flatness of the coil.

[0010] Furthermore, the two clamping plates 2 are mounted on the frame so as to rotate around an axis parallel to the guide roller 1. The clamping plates 2 are equipped with distance sensors, which are used to detect the distance between the clamping surface of the clamping plates 2 and the adjacent label paper or film, so that the clamping surface of the clamping plates 2 is parallel to the label paper and film between the clamping plates 2.

[0011] As the thickness of the film and label paper rolled up by the rotating shaft 2 gradually increases, the angle of the film and label paper between the guide roller 1 and the rotating shaft 2 will gradually change. The detection value of the distance sensor can provide a reference for the position change of the clamping plate 2, and can ensure that the clamping surface of the clamping plate 2 is always parallel to the film and label paper in the clamping plate 2.

[0012] Furthermore, a guide roller is mounted on a frame and rotates around its own axis. A cavity is provided inside the guide roller, wherein the air pressure is lower than that outside the guide roller. A plurality of through holes connected to the cavity are provided on one side wall of the guide roller. An adsorption component includes a movable plate located in the cavity. When the outer peripheral surface of the movable plate is in contact with the inner peripheral surface of the guide roller, all the through holes on the side wall of the guide roller that are not in contact with the movable plate and in contact with the label paper or film form an adsorption port.

[0013] Furthermore, the movable plate 1 is slidably assembled in the guide roller 1 so that the outer circumference of the movable plate 1 is close to or away from the inner circumference of the guide roller 1.

[0014] The movable plate 1 can be separated from the inner circumference of the guide roller 1, so that the guide roller 1 rotates around its own axis, reducing the friction force on the label paper or film in contact with the guide roller 1; the guide roller 1 rotates continuously with the transportation of the label paper and the film, and the rotation of the guide roller 1 will not affect the position of the suction port 1.

[0015] Furthermore, a fixed frame is provided in cavity 1, and the fixed frame is fixedly assembled on the frame, and there is a gap between the fixed frame and the guide roller 1. A mounting plate is slidably assembled on the fixed frame, and the mounting plate and the movable plate 1 are both located in the gap. The axis of the sliding track of the mounting plate coincides with the axis of the guide roller 1, and the movable plate 1 is radially slidably assembled on the mounting plate along the guide roller 1.

[0016] The mounting plate rotates, causing the movable plate 1 to rotate, so that the size and position of the adsorption port 1 can be adjusted according to adsorption needs, making the use more flexible.

[0017] Furthermore, the adsorption component 2 includes a negative pressure container and a movable plate 2. The negative pressure container is slidably assembled on the frame. The extension line of the sliding trajectory of the negative pressure container coincides with the extension line of the sliding trajectory of the guide roller 1. The negative pressure container has a cavity 2 inside whose air pressure is lower than that outside the negative pressure container. The negative pressure container is provided with a through hole 2 connected to the cavity 2. The movable plate 2 is slidably assembled on the negative pressure container along a direction parallel to the axis of the guide roller 1. When the outer peripheral surface of the movable plate 2 is in contact with the inner wall of the cavity 2, all the through holes 2 on the negative pressure container that are not in contact with the movable plate 2 form an adsorption port 2. The width of the adsorption port 2 along the extension direction of the guide roller 1 does not exceed the width of the film or label paper close to the adsorption port 2.

[0018] Move the movable plate 2 so that the width of the suction port 2 does not exceed the width of the label paper or film near the suction port 2 to prevent the occurrence of suction overlap areas and prevent material deformation.

[0019] Furthermore, torque sensors are mounted on the first rotating shaft and the second rotating shaft.

[0020] By referring to the indication of the torque sensor, the tension on the film and label paper can be accurately grasped, making it convenient to adjust the device parameters in a timely manner.

[0021] Furthermore, a visual sensor is provided between the guide roller 1 and the negative pressure container, and the visual sensor is used to capture and analyze images of the film and label paper between the guide roller 1 and the negative pressure container.

[0022] The visual sensor can detect whether the label paper and the film are separated. At the same time, it can detect whether there are obvious appearance defects such as bubbles and wrinkles between the label paper and the film, thereby improving the degree of automation and reducing the workload of workers.

[0023] A method for producing a surface coating of a laser anti-counterfeiting label comprises the following steps: ① The label paper roll and the film roll are respectively installed on the two rotating shafts 1, and the label paper and the film roll are stacked and arranged and sent between the heating plate and the supporting plate. The guide roller 1 is located at a predetermined position, and the label paper and the film sent from between the heating plate and the supporting plate are wound around the guide roller 1 and then rolled up by the rotating shaft 2; ② The heating plate and the supporting plate are close to each other, a predetermined pressure is applied to the label paper and the film paper, and a constant temperature is maintained for a predetermined time to complete the lamination; the heating plate and the supporting plate are separated, and the lamination-completed label paper is cooled in the process of being sent to the guide roller 1; ③ When the laminated label paper is wound around the guide roller 1, the two clamping plates 1 approach each other to fix the film and label paper between the clamping plates 1, and the guide roller 1 moves to a position outside the predetermined position along the predetermined trajectory, and the suction port 1 and the suction port 2 generate an adsorption force to adsorb the adjacent label paper or film. When the film and the label paper are separated under the action of the two adsorption forces, the device stops; when the film and the label paper remain in a bonded state, the rotating shaft 1 moves to the predetermined position, the two clamping plates 1 move away from each other, and the rotating shaft 1 and the rotating shaft 2 rotate, driving the unlaminated label paper and film into between the heating plate and the supporting plate.

[0024] The heating plate and the supporting plate can exert stable pressure over a large area, ensuring close contact between the film and the label paper, and reducing the occurrence of problems such as bubbles and wrinkles; the suction port 1 and the suction port 2 generate suction in opposite directions to the film and label paper with zero tension. When the film is bonded to the label paper, the relative position between the film and the label paper is not affected by the suction. When the film is not bonded to the label paper, the two are separated from each other under the action of the suction. Through the mutual cooperation of the clamping plate 1 and the guide roller 1, the tension of the label paper and the film wound on the guide roller 1 is changed, which does not affect the lamination and cooling process of the label, and there is no need to wait until the winding is completed before testing the bonding condition of the film and the label paper.

[0025] The beneficial effects of the present invention are: ① The visual sensor can detect whether there are appearance defects such as bubbles and wrinkles between the film label paper. At the same time, the label paper and the film are subjected to suction in opposite directions. When the two are not bonded together, the label paper and the film are separated. After the separation is detected by the visual sensor, the device stops immediately; when the two are firmly bonded, the label paper and the film are not separated. After the non-separation is detected by the visual sensor, the device continues to run. It can detect whether there are obvious appearance defects such as bubbles and wrinkles on the laminated label paper, and can also detect the situation where the label paper and the film are not bonded even though there is no obvious deformation; ② Clamp one and clamp two are located on both sides of guide roller one, and the film and label paper between clamp one and clamp two are separately isolated. Guide roller one moves back and forth, so that the tension of the film and label paper between clamp one and clamp two varies from a preset value to zero, and the tension of the film and label paper in other parts always maintains the preset value. There is no need to wait until the winding is completed before testing the bonding condition of the film and label paper, so as to avoid unnecessary operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the installation structure of the mobile seat 1 and the mobile seat 2; Figure 3 It is a schematic diagram of the assembly structure of the guide roller 1 and the movable seat 1; Figure 4 It is a schematic diagram of the installation structure of the second splint; Figure 5 It is a schematic diagram of the splitting of the movable plate 1 and the mounting plate installation structure; Figure 6 It is a schematic diagram of the disassembly of the installation structure of the linear actuator 6 and the motor 4; Figure 7 It is a disassembled schematic diagram of the negative pressure container installation structure; Figure 8 It is a schematic diagram of the structure of cavity 2 and through hole 2.

[0027] Description of reference numerals: 1. Frame; 2. Rotating shaft 1; 3. Rotating shaft 2; 4. Heating plate; 5. Support plate; 6. Motor 1; 7. Motor 2; 8. Motor 3; 9. Motor 4; 10. Guide roller 1; 11. Linear actuator 1; 12. Linear actuator 2; 13. Linear actuator 3; 14. Linear actuator 4; 15. Linear actuator 5; 16. Linear actuator 6; 17. Linear actuator 7; 18. Linear actuator 8; 19. Guide roller 2; 20. Cavity 1; 21. Cavity 2; 22. Through hole one; 23. Through hole two; 24. Moving seat one; 25. Fixed rod; 26. Bearing; 27. Mounting ring; 28. Clamp one; 29. ​​Clamp two; 30. Rotating frame; 31. Distance sensor; 32. Vacuum pump one; 33. Vacuum pump two; 34. Movable plate one; 35. Fixed frame; 36. Mounting plate; 37. Arc slide; 38. Sliding block; 39. Gear; 40. Gear teeth; 41. Negative pressure container; 42. Movable plate two; 43. Moving seat two. DETAILED DESCRIPTION

[0028] 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. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] A surface coating device for producing laser anti-counterfeiting labels, such as Figure 1 As shown, it includes a frame 1 and a material discharging module, a film coating module, a detection module and a material receiving module which are sequentially assembled on the frame 1.

[0030] The unloading module includes two rotating shafts 2 rotatably mounted on the frame 1, the rotating shaft 2 is driven by a motor 6 fixedly mounted on the frame 1, an internal support fixture is installed on the rotating shaft 2, the two rotating shafts 2 are used to install a film roll and a label paper roll respectively, and a torque sensor is installed on the rotating shaft 2.

[0031] The laminating module includes a heating plate 4 and a supporting plate 5 which are slidably mounted on the frame 1. The fixed ends of the linear actuator 11 and the linear actuator 2 12 are fixedly mounted on the frame 1. The output ends of the linear actuator 11 and the linear actuator 2 12 are respectively fixedly connected to the heating plate 4 and the supporting plate 5. The linear actuator 11 and the linear actuator 2 12 extend or shorten synchronously to drive the heating plate 4 and the supporting plate 5 to move closer to or away from each other. A plurality of guide rollers 2 19 which are mounted on the frame 1 and rotate around their own axes are provided on both sides of the heating plate 4, so that the film and label paper between the heating plate 4 and the supporting plate 5 are stacked and attached and parallel to the working surfaces of the heating plate 4 and the supporting plate 5.

[0032] The detection module includes a guide roller 10 slidably assembled on the frame 1, clamping components arranged on both sides of the guide roller 10 for fixing and clamping the film and the label paper, and an adsorption mechanism for adsorbing the film and the label paper respectively. The adsorption mechanism includes an adsorption component 1 and an adsorption component 2. The adsorption component 1 is arranged inside the guide roller 10 and is used to adsorb the film on the guide roller 10. The adsorption component 2 is arranged outside the guide roller 10 and is used to adsorb the label paper so that the label paper is away from the guide roller 10.

[0033] The guide roller 10 is a cylindrical structure having a cylindrical cavity 20 inside. A plurality of through holes 22 communicating with the cavity 20 are provided on the side wall of the guide roller 10. The guide roller 10 is assembled on the moving seat 24 for rotation around its own axis. Figure 3 As shown, a mounting hole is provided on the movable seat 24, a fixing rod 25 is fixedly installed in the mounting hole, a bearing 26 is sleeved outside the fixing rod 25, an inner ring of the bearing 26 is fixedly installed on the outer circumference of the fixing rod 25, and a mounting ring 27 coaxial with the guide roller 10 is fixedly provided on one end surface of the guide roller 10, and the mounting ring 27 is fixedly sleeved on the outer ring of the bearing 26; Figure 2 As shown, the movable seat 1 24 is assembled on the frame 1 by sliding up and down through the linear actuator 3 13 , the fixed end of the linear actuator 3 13 is vertically fixedly assembled on the frame 1 , and the output end of the linear actuator 3 13 is fixedly connected to the movable seat 1 24 .

[0034] The clamping assembly includes two clamping plates 1 28 and two clamping plates 29, referring to Figure 1 , two clamping plates 1 28 are located between the heating plate 4 and the guide roller 10, and two clamping plates 2 29 are located between the rotating shaft 2 3 and the guide roller 10. The assembly methods of the clamping plates 1 28 and the clamping plates 2 29 are the same. Taking the clamping plates 2 29 as an example, Figure 4As shown, the second clamping plate 29 is assembled on the rotating frame 30, and the motor three 8 whose output shaft is parallel to the axis of the guide roller one 10 is fixedly assembled on the frame 1, and the rotating frame 30 is fixedly connected to the output shaft of the motor three 8. The fixed ends of the linear actuator four 14 and the linear actuator five 15 are fixedly assembled on the rotating frame 30. The two clamping plates two 29 are respectively fixedly connected to the output ends of the linear actuator four 14 and the linear actuator five 15. The linear actuator four 14 and the linear actuator five 15 are used to drive the two clamping plates two 29 to move closer to or away from each other. Three or more distance sensors 31 that are not on the same straight line are assembled on the clamping plate two 29. In this embodiment, four distance sensors 31 are assembled on the clamping plate two 29. The four distance sensors 31 are respectively located at the four corners of the rectangle. The plane where the transmitting ends of the four distance sensors 31 are located is parallel to the clamping surfaces of the two clamping plates two 29. The distance sensor 31 is used to detect the distance between the clamping surface of the clamping plate two 29 and the film or label paper in the clamping plate two 29.

[0035] The adsorption assembly includes a vacuum pump 32 for generating negative pressure in the cavity 20, a movable plate 34 for cooperating with the guide roller 10 to form an adsorption port, and a motor 9 for driving the movable plate 34 to move to change the size of the adsorption port. Figure 3 , the vacuum pump 32 is fixedly assembled at the other end of the guide roller 10, as shown in FIG. Figure 5 As shown, there are two movable plates 34, the two movable plates 34 are located in the cavity 20 and are respectively located on both sides of the axis of the guide roller 10, the end of the fixed rod 25 away from the frame 1 is located in the cavity 20, and a fixed frame 35 is fixedly installed on the fixed rod 25 located in the cavity 20, and a gap is formed between the outer circumference of the fixed frame 35 and the inner circumference of the guide roller 10, and a movable plate 34 and a mounting plate 36 are arranged in the gap, and the movable plate 34 and the mounting plate 36 are both fan-shaped plates, and the lengths of the movable plate 34 and the mounting plate 36 along the axis direction of the guide roller 10 are equal to the axial length of the cavity 20, when the outer circumference of the movable plate 34 is in contact with the inner circumference of the guide roller 10, and the inner circumference of the mounting plate 36 is in contact with the outer circumference of the fixed frame 35, the axis of the movable plate 34 and the mounting plate 36 coincides with the axis of the guide roller 10; as shown in FIG. Figure 6As shown, the fixed end of the linear actuator 6 16 extending horizontally is fixed on the mounting plate 36, and the output end of the linear actuator 6 16 is fixedly connected to the movable plate 1 34, so that the movable plate 1 34 can be horizontally slidably assembled on the mounting plate 36; the mounting plate 36 is provided with an arc-shaped slide groove 37 whose axis coincides with the guide roller 10, and the fixed frame 35 is provided with a slider 38 adapted to the arc-shaped slide groove 37, and the slider 38 is engaged in the arc-shaped slide groove 37. The mounting plate 36 is slidably assembled on the fixed frame 35 through the motor 49, and the motor 49 is fixedly assembled on the fixed frame 35. A gear 39 is fixed on the output shaft of the motor 49, and a gear tooth 40 meshing with the gear 39 is fixed on the mounting plate 36. When the motor 49 is started, the mounting plate 36 slides along the arc-shaped slide groove 37 through the mutual cooperation of the gear 39 and the gear tooth 40. The linear actuator 616 drives the movable plate 34 so that the outer circumference of the movable plate 34 contacts the inner circumference of the cavity 20, and the motor 49 is adjusted. The inner circumference of the cavity 20 corresponding to the upper and lower side walls of the guide roller 10 that contacts the film or label paper is located between the movable plates 34, and all the through holes 22 on the side walls of the guide roller 10 that contacts the film or label paper constitute an adsorption port.

[0036] The adsorption assembly 2 includes a negative pressure container 41 slidably mounted on the frame 1, two movable plates 42 used to cooperate with the negative pressure container 41 to form the adsorption port 2, and a linear actuator 818 used to drive the movable plate 242 to move to change the size of the adsorption port 2. Figure 7 and Figure 8 As shown, the negative pressure container 41 has a cavity 21 inside, and the top surface of the negative pressure container 41 is a downwardly concave arc surface; the top of the negative pressure container 41 is provided with a plurality of through holes 23 connected to the cavity 21, and a vacuum pump 23 is fixedly mounted on the negative pressure container 41; the negative pressure container 41 is fixedly mounted on the movable seat 243, referring to Figure 2 The movable seat 243 is assembled on the frame 1 by sliding up and down through the linear actuator 717. The fixed end of the linear actuator 717 is vertically fixedly assembled on the frame 1, and the output end of the linear actuator 717 is fixedly connected to the movable seat 243; the top surface of the movable plate 242 is in contact with the inner top surface of the cavity 21, and the fixed ends of two symmetrically arranged linear actuators 818 are fixedly assembled on the negative pressure container 41. The movable plate 242 is fixedly connected to the output end of the linear actuator 818. The driving direction of the linear actuator 818 is the same as the extension direction of the axis of the guide roller 10. All through holes 23 on the negative pressure container 41 that are opposite to the film and label paper between the clamping plate 1 28 and the clamping plate 29 and are not in contact with the movable plate 242 are adsorption ports 2.

[0037] The receiving module includes a rotating shaft 2 3 rotatably mounted on the frame 1 , the rotating shaft 2 3 is driven by a motor 2 7 fixedly mounted on the frame 1 , the rotating shaft 2 3 is used to reel in label paper covered with a film, and a torque sensor is mounted on the rotating shaft 2 3 .

[0038] A method for producing a surface coating of a laser anti-counterfeiting label comprises the following steps: ① Assemble the label paper and film on the frame 1; fix the label paper roll and film roll on the two rotating shafts 2 respectively, adjust the linear actuator 3 13 so that the guide roller 10 is located at a predetermined position, and wind the label paper and film paper around the guide roller 2 19 and the guide roller 10. In this embodiment, the film is in contact with the outer peripheral surface of the guide roller 10, and the stacked and bonded label paper and film pass through the gap between the clamping plate 1 28 and the clamping plate 2 29 and are wound up by the rotating shaft 2 3; adjust the motor 1 6 and the motor 2 7 under the action of the torque sensor so that a predetermined value of tension is generated between the label paper and the film, and the label paper and film located between the heating plate 4 and the supporting plate 5 are stacked and bonded and parallel to the working surfaces of the heating plate 4 and the supporting plate 5; ② Heat the film and paste it on the label paper; adjust the linear actuator 11 and the linear actuator 2 12, the heating plate 4 and the supporting plate 5 are respectively attached to the label paper and the film and maintain a predetermined pressure, control the heating plate 4 to maintain a predetermined temperature, and after maintaining the constant temperature and pressure state for a predetermined time, the heating plate 4 and the supporting plate 5 are separated from the film and the label paper respectively; start the motor 1 6 and the motor 2 7, and move the laminated label paper out from between the heating plate 4 and the supporting plate 5, and cool it in the process of sending it to the guide roller 10; ③ Check whether the film is fixedly attached to the label paper; when the laminated label paper is wound on the guide roller 10, adjust the motor 3 8 with reference to the detection value of the distance sensor 31, so that the clamping surface of the clamping plate 28 is parallel to the film and label paper between the clamping plate 1 28, and the clamping surface of the clamping plate 29 is parallel to the film and label paper between the clamping plate 29, and adjust the linear actuator 4 14 and the linear actuator 5 15, so that the two clamping plates 1 28 fix the film and label paper between the clamping plates 1 28, and the two clamping plates 29 fix the film and label paper between the clamping plates 29; adjust the linear actuator 3 13 to move the guide roller 10 upward, the tension of the film and label paper between the clamping plates 1 28 and 29 is zero, and the indication of the torque sensor remains unchanged; Start the vacuum pump 32 to make the pressure in the cavity 20 less than the atmospheric pressure. The cavity 20 generates a suction force toward the axis direction of the guide roller 10 through the adsorption port of the film. Adjust the linear actuator 13 to drive the moving seat 24 to move upward. Under the action of the vacuum pump 32, the film attached to the adsorption port 1 moves upward synchronously with the guide roller 10. Adjust the linear actuator 7 17, move the negative pressure container 41 upward, adjust the linear actuator 8 18, all the through holes 23 on the negative pressure container 41 between the two movable plates 2 42 form a suction port 2, the width of the suction port 2 along the axis direction of the guide roller 10 is the same as the width of the label paper, the suction port 2 is opposite to the label paper up and down, start the vacuum pump 2 33, the pressure in the cavity 21 is less than the atmospheric pressure, and the cavity 21 generates a suction force on the label paper through the through holes 23 to drive the label paper downward; Observe the condition of the film and label paper between the guide roller 10 and the negative pressure container 41. If the film is adsorbed on the guide roller 10 and the label paper is adsorbed on the negative pressure container 41, and the film and the label paper are separated, it proves that the film and the label paper are not firmly pasted. It is necessary to stop the device in time and check and correct the device, the label paper and the film. When the film and the label paper are not separated, adjust the linear actuator three 13 and the linear actuator seven 17, move the guide roller 10 and the negative pressure container 41 downward, and return the guide roller 10 to the predetermined position in step ①. Adjust the linear actuator four 14 and the linear actuator five 15, and the clamp plate one 28 and the clamp plate two 29 loosen the film and the label paper. The torque sensor reading remains unchanged, and the rotating shaft one 2 and the rotating shaft two 3 rotate to a predetermined angle, and then the next detection is performed.

[0039] Linear actuator 1 11, linear actuator 2 12, linear actuator 3 13, linear actuator 4 14, linear actuator 5 15, linear actuator 6 16, linear actuator 7 17, linear actuator 8 18 are all electric push rods or hydraulic rods, motor 1 6, motor 2 7, motor 3 8 and motor 4 9 are stepper motors or servo motors, and PLC is assembled on the frame 1. The control ends of linear actuator 1 11, linear actuator 2 12, linear actuator 3 13, linear actuator 4 14, linear actuator 5 15, linear actuator 6 16, linear actuator 7 17, linear actuator 8 18 are connected to the output end of the PLC, and the distance sensor 31 and the torque sensor are connected to the input end of the PLC.

[0040] In order to improve the degree of automation, a visual sensor is installed on the movable seat 43, and the visual sensor is connected to the input end of the PLC. The visual sensor is used to capture and analyze the image of the film and label paper between the guide roller 10 and the negative pressure container 41. If the visual sensor detects that the film and the label paper are separated or there are obvious appearance defects such as bubbles and wrinkles on the coated label paper, the PLC control device stops running.

Claims

1. A surface coating device for producing laser anti-counterfeiting labels, characterized in that: The machine comprises a frame, on which a feeding module, a laminating module, a detection module and a receiving module are sequentially mounted along the conveying direction of the label paper and the film; the feeding module comprises a rotating shaft 1 for releasing the film and the label paper, and the receiving module comprises a rotating shaft 2 for rolling up the film and the label paper, and a predetermined tension exists on the film and the label paper between the rotating shaft 1 and the rotating shaft 2; the laminating module comprises a heating plate and a supporting plate, and the heating plate and the supporting plate are close to each other to heat the film and stick it on the label paper; the detection module comprises a guide roller 1, a clamping mechanism and an adsorption mechanism, and the guide roller 1 is slidably mounted on the frame along a direction perpendicular to the axis of the guide roller 1, and when the guide roller 1 moves to a predetermined position along a predetermined trajectory, the stacked and bonded arrangement The label paper and film are wound around the guide roller 1 with a predetermined pressure, and when the guide roller 1 moves to a position outside the predetermined position, the tension of the label paper and film wound around the guide roller 1 is zero; the clamping mechanism includes two clamping plates 1 located between the heating plate and the guide roller 1, and the two clamping plates 1 are close to each other to fix the film and label paper between the clamping plates 1, so that the film and label paper between the clamping plates 1 and the rotating shaft 1 maintain a predetermined tension; the adsorption mechanism includes an adsorption component 1 with an adsorption port 1, and an adsorption component 2 with an adsorption port 2, and the adsorption port 1 and the adsorption port 2 are located on both sides of the label paper and film with zero tension and output adsorption force, so that the label paper and film move in opposite directions perpendicular to the axis of the guide roller 1.

2. The surface coating device for producing laser anti-counterfeiting labels according to claim 1 is characterized in that: The clamping mechanism includes two clamping plates 2 located between the rotating shaft 2 and the guide roller 1. The two clamping plates 2 are close to each other to fix the film and label paper between the clamping plates 2, so that the film and label paper maintain a predetermined tension between the clamping plates 2 and the rotating shaft 2.

3. The surface coating device for producing laser anti-counterfeiting labels according to claim 2 is characterized in that: The two clamping plates are mounted on the frame and rotate around an axis parallel to the guide roller. A distance sensor is mounted on the clamping plate. The distance sensor is used to detect the distance between the clamping surface of the clamping plate and the adjacent label paper or film, so that the clamping surface of the clamping plate is parallel to the label paper and film between the clamping plates.

4. The surface coating device for producing laser anti-counterfeiting labels according to claim 3 is characterized in that: A guide roller is mounted on a frame and rotates around its own axis. A cavity is provided inside the guide roller, and the air pressure is lower than that outside the guide roller. A plurality of through holes connected to the cavity are provided on one side wall of the guide roller. An adsorption component includes a movable plate located in the cavity. When the outer peripheral surface of the movable plate is in contact with the inner peripheral surface of the guide roller, all the through holes on the side wall of the guide roller that are not in contact with the movable plate and in contact with the label paper or film form an adsorption port.

5. The surface coating device for producing laser anti-counterfeiting labels according to claim 4 is characterized in that: The movable plate 1 is slidably assembled in the guide roller 1 so that the outer circumference of the movable plate 1 is close to or away from the inner circumference of the guide roller 1.

6. The surface coating device for producing laser anti-counterfeiting labels according to claim 5, characterized in that: A fixed frame is provided in cavity 1, which is fixedly assembled on the frame, with a gap between the fixed frame and the guide roller 1, and a mounting plate is slidably assembled on the fixed frame, the mounting plate and the movable plate 1 are both located in the gap, the axis of the sliding track of the mounting plate coincides with the axis of the guide roller 1, and the movable plate 1 is radially slidably assembled on the mounting plate along the guide roller 1.

7. The surface coating device for producing laser anti-counterfeiting labels according to claim 6, characterized in that: Adsorption component 2 includes a negative pressure container and a movable plate 2. The negative pressure container is slidably assembled on the frame. The extension line of the sliding trajectory of the negative pressure container coincides with the extension line of the sliding trajectory of the guide roller 1. The negative pressure container has a cavity 2 inside whose air pressure is lower than that outside the negative pressure container. The negative pressure container is provided with a through hole 2 connected to the cavity 2. The movable plate 2 is slidably assembled on the negative pressure container along a direction parallel to the axis of the guide roller 1. When the outer peripheral surface of the movable plate 2 is in contact with the inner wall of the cavity 2, all the through holes 2 on the negative pressure container that are not in contact with the movable plate 2 form an adsorption port 2. The width of the adsorption port 2 along the extension direction of the guide roller 1 does not exceed the width of the film or label paper close to the adsorption port 2.

8. The surface coating device for producing laser anti-counterfeiting labels according to claim 7, characterized in that: The torque sensors are mounted on the first rotating shaft and the second rotating shaft.

9. The surface coating device for producing laser anti-counterfeiting labels according to claim 8, characterized in that: A visual sensor is provided between the guide roller 1 and the negative pressure container, and the visual sensor is used to capture and analyze images of the film and label paper between the guide roller 1 and the negative pressure container.

10. A method for coating the surface of a laser anti-counterfeit label, using the laser anti-counterfeit label coating device according to any one of claims 1 to 9, characterized in that: The following steps are involved: ① The label paper roll and the film roll are respectively installed on the two rotating shafts 1, and the label paper and the film roll are stacked and arranged and sent between the heating plate and the supporting plate. The guide roller 1 is located at a predetermined position, and the label paper and the film sent from between the heating plate and the supporting plate are wound around the guide roller 1 and then rolled up by the rotating shaft 2; ② The heating plate and the supporting plate are close to each other, applying a predetermined pressure to the label paper and film paper, and maintaining a constant temperature for a predetermined time to complete the lamination; The heating plate and the supporting plate are separated, and the laminated label paper is cooled while being sent to the guide roller 1; ③ When the laminated label paper is wound around the guide roller 1, the two clamping plates 1 approach each other to fix the film and label paper between the clamping plates 1, and the guide roller 1 moves to a position outside the predetermined position along the predetermined trajectory, and the suction port 1 and the suction port 2 generate an adsorption force to adsorb the adjacent label paper or film. When the film and the label paper are separated under the action of the two adsorption forces, the device stops; when the film and the label paper remain in a bonded state, the rotating shaft 1 moves to the predetermined position, the two clamping plates 1 move away from each other, and the rotating shaft 1 and the rotating shaft 2 rotate, driving the unlaminated label paper and film into between the heating plate and the supporting plate.

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