A surface laminating device and method for producing laser anti-counterfeiting labels

Abstract

The present invention belongs to the field of label lamination technology, and in particular, relates to a surface lamination device and method for producing laser anti-counterfeiting labels, including a frame, a feeding module, a lamination module, a detection module and a receiving module; the feeding module includes a rotating shaft 1, and the receiving module includes a rotating shaft 2; the lamination module includes a heating plate and a supporting plate; the detection module includes a guide roller 1, a clamping mechanism and an adsorption mechanism, when the guide roller 1 moves to a predetermined position along a predetermined trajectory, the tension of the label paper and the film wound on the guide roller 1 is zero; the clamping mechanism includes a clamping plate 1 between the heating plate and the guide roller 1, and the film and the label paper between the clamping plate 1 and the rotating shaft 1 maintain a predetermined tension; the adsorption mechanism includes an adsorption port 1 and an adsorption port 2, and the label paper and the film can move in a direction perpendicular to the axis of the guide roller 1 and in the opposite direction. The present invention can detect the situation that the label paper and the film are not bonded but there is no obvious appearance deformation such as bubbles or wrinkles.

Description

Technical Field

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

[0002] Film laminating is an important step to ensure the function and aesthetics of laser anti-counterfeiting labels during transportation, storage, and use. It can provide an additional layer of protection for laser anti-counterfeiting labels, protecting them from physical damage such as scratches, and at the same time enhancing the water resistance and corrosion resistance of the labels, enabling them to remain stable in harsh environments and not easily damaged by contact with moisture or chemical substances.

[0003] During the film laminating process, due to impurities on the surface of the label paper or film, or insufficient film laminating pressure, etc., the film fails to adhere to the label paper. In such cases, it is necessary to stop the machine in time to replace the label paper and film or repair the device. In the prior art, usually after the film laminating and winding are completed, the rolled material is taken down and the adhesion test is carried out in a laboratory or a dedicated test area. The situation where the film fails to adhere to the label paper cannot be detected in time, resulting in a large number of products needing to be reworked or scrapped, increasing the production cost.

[0004] The Chinese patent document with the publication number CN205526964U discloses an anti-counterfeiting logistics label film laminating device. The covering film and the anti-counterfeiting label are pressed into a film-laminated label after passing through a pressing device. The film-laminated label passes through a displacement sensor, a photoelectric detection sensor, a cutting device, and a collecting device, and finally enters a sub-packaging device. When the photoelectric detection sensor detects air bubbles in the film-laminated label that has been film-laminated, the alarm lamp and the high-pitched horn start to work, and at the same time, the secondary pressing device works, saving the manual detection link. In the actual production process, there are situations where the label paper and the film are not adhered and there are air bubbles. For example, large particles of dust on the surface of the label paper or film cause the label paper and the film to fail to adhere. There are also situations where the label paper and the film are not adhered but there are no air bubbles or obvious deformations in appearance such as wrinkles, such as insufficient film laminating pressure and film laminating temperature. Using the above patent can only detect the film-laminated label with air bubbles and cannot detect the situation where the label paper and the film are not adhered but there are no air bubbles or obvious deformations in appearance such as wrinkles. Summary of the Invention

[0005] The present invention provides a surface film laminating device and method for producing laser anti-counterfeiting labels to solve the technical problem that during the operation of the device, it is impossible to detect the situation where the label paper and the film are not adhered but there are no air bubbles or obvious deformations in appearance such as wrinkles.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A surface laminating device for producing laser anti-counterfeiting labels, comprising a frame. Along the conveying direction of the label paper and the film, a feeding module, a laminating module, a detection module and a collecting module are sequentially assembled on the frame. The feeding module includes a first rotating shaft for releasing the film and the label paper. The collecting module includes a second rotating shaft for winding the film and the label paper. There is a predetermined tension on the film and the label paper between the first rotating shaft and the second rotating shaft. The laminating module includes a heating plate and a supporting plate. The heating plate and the supporting plate approach each other to heat the film and paste it on the label paper. The detection module includes a first guiding roller, a clamping mechanism and an adsorption mechanism. The first guiding roller is slidably assembled on the frame along a direction perpendicular to the axis of the first guiding roller. When the first guiding roller moves along a predetermined track to a predetermined position, the label paper and the film arranged in a stacked and laminated manner are wound around the first guiding roller under a predetermined pressure. When the first guiding roller moves to a position outside the predetermined position, the tension of the label paper and the film wound around the first guiding roller is zero. The clamping mechanism includes two first clamping plates located between the heating plate and the first guiding roller. The two first clamping plates approach each other to fixedly clamp the film and the label paper between the first clamping plates, so that the film and the label paper between the first clamping plate and the first rotating shaft maintain a predetermined tension. The adsorption mechanism includes a first adsorption component having a first adsorption port and a second adsorption component having a second adsorption port. The first adsorption port and the second adsorption port are located on both sides of the label paper and the film with zero tension and output an adsorption force, so that the label paper and the film move in opposite directions perpendicular to the axis of the first guiding roller.

[0008] The first guiding roller can move along a predetermined track, so that the tension of the label paper and the film wound around the first guiding roller is zero. At this time, the first adsorption port and the second adsorption port can adsorb the film and the label paper in opposite directions. If the film is not adhered to the label paper, whether there are bubbles between the label paper and the film or not, the user can observe that the film and the label paper are separated from each other and stop the device in time. When the first adsorption port and the second adsorption port cannot separate the film and the label paper, the first guiding roller returns to the predetermined position and the device continues to operate, and the laminated label paper can be detected at any time without waiting for the winding to be completed. During the detection process, the first clamping plates fixedly clamp the label paper and the film between the first clamping plates, and there is always a predetermined tension on the film and the label paper between the first rotating shaft and the first clamping plates. The detection process does not affect the laminating and cooling processes, ensures the flatness of the film and the label paper, helps the film to be evenly adhered to the label paper, reduces bubbles, and at the same time ensures that the temperature on the film and the label paper drops evenly, avoiding material deformation or stress concentration caused by local temperature difference.

[0009] Further, the clamping mechanism includes two second clamping plates located between the second rotating shaft and the first guiding roller. The two second clamping plates approach each other to fixedly clamp the film and the label paper between the second clamping plates, so that the film and the label paper between the second clamping plate and the second rotating shaft maintain a predetermined tension.

[0010] The setting of the second clamping plate ensures that there is always a predetermined tension between the film and the label paper between the second clamping plate and the second rotating shaft, avoiding wrinkles or slack in the film and label paper during the winding process and ensuring the flatness of the coiled material.

[0011] Further, the two second clamping plates are rotationally assembled on the frame around an axis parallel to the axis of the first guiding roller. The second clamping plates are equipped with distance sensors for detecting the distance between the clamping surfaces of the second clamping plates and the adjacent label paper or film, so that the clamping surfaces of the second clamping plates are parallel to the label paper and film between the second clamping plates.

[0012] As the thickness of the film and label paper wound by the second rotating shaft gradually increases, the angle of the film and label paper between the first guiding roller and the second rotating shaft will gradually change. The detection value of the distance sensor can provide a reference for the position change of the second clamping plate, ensuring that the clamping surfaces of the second clamping plates are always parallel to the film and label paper inside the second clamping plates.

[0013] Further, the first guiding roller is rotationally assembled on the frame around its own axis. The first guiding roller has a cavity one inside with a pressure lower than that outside the first guiding roller. A plurality of through holes one communicating with the cavity one are provided on the side wall of the first guiding roller. The first adsorption assembly includes a movable plate one located in the cavity one. When the outer peripheral surface of the movable plate one fits the inner peripheral surface of the first guiding roller, all the through holes one on the side wall of the first guiding roller that do not contact the movable plate one and are in contact with the label paper or film form an adsorption port one.

[0014] Further, the movable plate one is slidably assembled inside the first guiding roller so that the outer peripheral surface of the movable plate one approaches or moves away from the inner peripheral surface of the first guiding roller.

[0015] The movable plate one can be separated from the inner peripheral surface of the first guiding roller, enabling the first guiding roller to rotate around its own axis, reducing the friction force borne by the label paper or film in contact with the first guiding roller. As the first guiding roller rotates continuously with the transportation of the label paper and film, the rotation of the first guiding roller does not affect the position of the adsorption port one.

[0016] Further, a fixing frame is provided in the cavity one. The fixing frame is fixedly assembled on the frame. There is a gap between the fixing frame and the first guiding roller. A mounting plate is slidably assembled on the fixing frame. Both the mounting plate and the movable plate one are located in the gap. The axis of the sliding trajectory of the mounting plate coincides with the axis of the first guiding roller. The movable plate one is slidably assembled on the mounting plate along the radial direction of the first guiding roller.

[0017] The rotation of the mounting plate causes the rotation of the movable plate one, enabling the adjustment of the size and position of the adsorption port one according to the adsorption needs, making the use more flexible.

[0018] Further, the second adsorption component includes a negative pressure container and a second movable plate. The negative pressure container is slidably assembled on the frame. The extension line of the sliding track of the negative pressure container coincides with the extension line of the sliding track of the first guide roller. The negative pressure container has a cavity two inside with a pressure lower than the outside of the negative pressure container. The negative pressure container is provided with a second through hole communicating with the cavity two. The second movable plate is slidably assembled on the negative pressure container along the direction parallel to the axis of the first guide roller. When the outer peripheral surface of the second movable plate fits with the inner wall of the cavity two, all the second through holes on the negative pressure container that do not fit with the second movable plate form an adsorption port two. The width of the adsorption port two along the extension direction of the first guide roller does not exceed the width of the film or label paper close to the adsorption port two.

[0019] Move the second movable plate so that the width of the adsorption port two does not exceed the width of the label paper or film close to the adsorption port two, prevent the occurrence of a suction coincidence area, and prevent material deformation.

[0020] Further, torque sensors are assembled on the first rotating shaft and the second rotating shaft.

[0021] Referring to the readings of the torque sensors, the tension conditions on the film and the label paper can be accurately grasped, which is convenient for timely adjusting the device parameters.

[0022] Further, a vision sensor is provided between the first guide roller and the negative pressure container. The vision sensor is used to capture and analyze the images of the film and the label paper between the first guide roller and the negative pressure container.

[0023] The vision sensor is used to detect whether the label paper and the film are separated. At the same time, it can detect whether there are obvious external defects such as air bubbles and wrinkles between the label paper and the film, improve the degree of automation, and reduce the workload of workers.

[0024] A method for surface laminating of laser anti-counterfeiting labels includes the following steps:

[0025] ① Install a label paper roll and a film roll on the two first rotating shafts respectively. After the label paper roll and the film roll are stacked and attached, they are sent between the heating plate and the supporting plate. The first guide roller is located at a predetermined position. The label paper and the film sent out from between the heating plate and the supporting plate are wound around the first guide roller and then wound up by the second rotating shaft.

[0026] ② The heating plate and the supporting plate approach each other, apply a predetermined pressure to the label paper and the film paper, and keep a constant temperature for a predetermined time to complete the laminating; the heating plate and the supporting plate are separated, and the laminated label paper is cooled during the process of being sent to the first guide roller.

[0027] ③When the label paper after film laminating is wound around the first guiding roller, the two clamping plates 1 approach each other to fixedly clamp the film and the label paper between the clamping plates 1. The first guiding roller moves along a predetermined trajectory to a position outside the predetermined position. When the first suction port and the second suction port generate a suction force for sucking the adjacent label paper or film, and the film and the label paper are separated under the action of the two suction forces, the device stops; when the film and the label paper remain in a bonded state, the first rotating shaft moves to the predetermined position, the two clamping plates 1 move away from each other, and the first rotating shaft and the second rotating shaft rotate to drive the uncompleted film-laminated label paper and film into the space between the heating plate and the supporting plate.

[0028] The heating plate and the supporting plate can apply a stable pressure over a large area to ensure close contact between the film and the label paper, reducing the occurrence of problems such as bubbles and wrinkles; the first suction port and the second suction port generate suction forces on the film and the label paper with zero tension in opposite directions. 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 force. When the film is not bonded to the label paper, the two are separated under the action of the suction force. Through the mutual cooperation of the first clamping plate and the first guiding roller, the tension of the label paper and the film wound around the first guiding roller is changed, without affecting the film laminating and cooling processes of the label, and there is no need to detect the bonding situation of the film and the label paper after the winding is completed.

[0029] The beneficial effects of the present invention are:

[0030] ①The vision sensor can detect whether there are appearance defects such as bubbles and wrinkles between the film and the label paper. At the same time, the label paper and the film are subjected to suction forces in opposite directions. When they are not bonded together, the label paper and the film are separated. After the separation situation is detected by the vision sensor, the device stops immediately; when they are firmly bonded, the label paper and the film do not separate. After the non-separation situation is detected by the vision sensor, the device continues to run. It can not only detect whether there are obvious appearance defects such as bubbles and wrinkles on the film-laminated label paper, but also detect the situation where the label paper and the film are not bonded although there is no obvious deformation.

[0031] ②The first clamping plate and the second clamping plate are located on both sides of the first guiding roller, isolating the film and the label paper between the first clamping plate and the second clamping plate separately. The first guiding roller reciprocates, so that the tension of the film and the label paper between the first clamping plate and the second clamping plate changes from a predetermined value to zero, and the tension of the other part of the film and the label paper always remains at the predetermined value. There is no need to detect the bonding situation of the film and the label paper after the winding is completed, avoiding unnecessary operation of the device. Description of the Drawings

[0032] Figure 1 is a structural schematic diagram of the present invention;

[0033] Figure 2 is an installation structural schematic diagram of the first moving seat and the second moving seat;

[0034] Figure 3 Schematic assembly structure diagram of the first guiding roller and the first moving seat;

[0035] Figure 4 Schematic installation structure diagram of the second clamping plate;

[0036] Figure 5 Schematic exploded view of the installation structure of the first movable plate and the mounting plate;

[0037] Figure 6 Schematic exploded view of the installation structure of the sixth linear actuator and the fourth motor;

[0038] Figure 7 Schematic exploded view of the installation structure of the negative pressure container;

[0039] Figure 8 Schematic structure diagram of the second cavity and the second through hole.

[0040] Description of the reference numerals:

[0041] 1. Frame; 2. First rotating shaft; 3. Second rotating shaft; 4. Heating plate; 5. Supporting plate; 6. First motor; 7. Second motor; 8. Third motor; 9. Fourth motor; 10. First guiding roller; 11. First linear actuator; 12. Second linear actuator; 13. Third linear actuator; 14. Fourth linear actuator; 15. Fifth linear actuator; 16. Sixth linear actuator; 17. Seventh linear actuator; 18. Eighth linear actuator; 19. Second guiding roller; 20. First cavity; 21. Second cavity; 22. First through hole; 23. Second through hole; 24. First moving seat; 25. Fixed rod; 26. Bearing; 27. Mounting ring; 28. First clamping plate; 29. Second clamping plate; 30. Rotating frame; 31. Distance sensor; 32. First vacuum pump; 33. Second vacuum pump; 34. First movable plate; 35. Fixed frame; 36. Mounting plate; 37. Arc-shaped chute; 38. Slide block; 39. Gear; 40. Teeth; 41. Negative pressure container; 42. Second movable plate; 43. Second moving seat. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Those skilled in the art should know that the following described embodiments 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 efforts fall within the protection scope of the present invention.

[0043] A surface film laminating device for producing laser anti-counterfeiting labels, as Figure 1 shown, includes a frame 1 and a feeding module, a film laminating module, a detection module, and a receiving module that are sequentially assembled on the frame 1.

[0044] The feeding module includes two first rotating shafts 2 rotatably assembled on the frame 1. The first rotating shafts 2 are driven by a first motor 6 fixedly installed on the frame 1. Inner support clamps are installed on the first rotating shafts 2. The two first rotating shafts 2 are respectively used for installing film rolls and label paper rolls, and torque sensors are assembled on the first rotating shafts 2.

[0045] The film laminating module includes a heating plate 4 and a supporting plate 5 slidably assembled on the frame 1. The fixed ends of a first linear actuator 11 and a second linear actuator 12 are fixedly assembled on the frame 1. The output ends of the first linear actuator 11 and the second linear actuator 12 are respectively fixedly connected to the heating plate 4 and the supporting plate 5. The first linear actuator 11 and the second linear actuator 12 extend or shorten synchronously to drive the heating plate 4 and the supporting plate 5 to approach or move away from each other. A plurality of second guide rollers 19 rotatably assembled on the frame 1 around their own axes are arranged on both sides of the heating plate 4, so that the film and the label paper located between the heating plate 4 and the supporting plate 5 are laminated and parallel to the working surfaces of the heating plate 4 and the supporting plate 5.

[0046] The detection module includes a first guide roller 10 slidably assembled up and down on the frame 1, a clamping assembly arranged on both sides of the first guide roller 10 for fixedly clamping the film and the label paper, and an adsorption mechanism respectively used for adsorbing the film and the label paper. The adsorption mechanism includes a first adsorption assembly and a second adsorption assembly. The first adsorption assembly is arranged inside the first guide roller 10 and is used for adsorbing the film on the first guide roller 10. The second adsorption assembly is arranged outside the first guide roller 10 and is used for adsorbing the label paper to make the label paper away from the first guide roller 10.

[0047] The first guide roller 10 is a cylindrical structure with a cylindrical cavity 20 inside. A plurality of first through holes 22 communicating with the cavity 20 are arranged on the side wall of the first guide roller 10. The first guide roller 10 is rotatably assembled on a first moving seat 24 around its own axis. As Figure 3 shown, the first moving seat 24 is provided with a mounting hole. A fixing rod 25 is fixedly assembled in the mounting hole. A bearing 26 is sleeved outside the fixing rod 25. The inner ring of the bearing 26 is fixedly assembled on the outer peripheral surface of the fixing rod 25. An installation ring 27 coaxial with the first guide roller 10 is fixedly arranged on one end surface of the first guide roller 10, and the installation ring 27 is fixedly sleeved on the outer ring of the bearing 26; As Figure 2 shown, the first moving seat 24 is slidably assembled up and down on the frame 1 through a third linear actuator 13. The fixed end of the third linear actuator 13 is vertically fixedly assembled on the frame 1, and the output end of the third linear actuator 13 is fixedly connected to the first moving seat 24.

[0048] The clamping assembly includes two first clamping plates 28 and two second clamping plates 29. Referring to Figure 1 , the two first clamping plates 28 are located between the heating plate 4 and the first guide roller 10, and the two second clamping plates 29 are located between the second rotating shaft 3 and the first guide roller 10. The assembly methods of the first clamping plates 28 and the second clamping plates 29 are the same. Taking the second clamping plate 29 as an example, as Figure 4As shown, the second clamping plate 29 is assembled on the rotating frame 30. A third motor 8 with an output shaft parallel to the axis of the first guide roller 10 is fixedly assembled on the machine frame 1. The rotating frame 30 is fixedly connected to the output shaft of the third motor 8. The fixed ends of the fourth linear actuator 14 and the fifth linear actuator 15 are fixedly assembled on the rotating frame 30. The two second clamping plates 29 are respectively fixedly connected to the output ends of the fourth linear actuator 14 and the fifth linear actuator 15. The fourth linear actuator 14 and the fifth linear actuator 15 are used to drive the two second clamping plates 29 to approach or move away from each other. Three or more distance sensors 31 that are not on the same straight line are assembled on the second clamping plate 29. In this embodiment, four distance sensors 31 are assembled on the second clamping plate 29. The four distance sensors 31 are respectively located at the four corners of a rectangle. The plane where the emission ends of the four distance sensors 31 are located is parallel to the clamping surface of the two second clamping plates 29. The distance sensors 31 are used to detect the distance between the clamping surface of the second clamping plate 29 and the film or label paper inside the second clamping plate 29.

[0049] The first adsorption assembly includes a first vacuum pump 32 for generating negative pressure in the first cavity 20, a first movable plate 34 for cooperating with the first guide roller 10 to form a first adsorption port, and a fourth motor 9 for driving the first movable plate 34 to move to change the size of the first adsorption port. Refer to Figure 3 , the first vacuum pump 32 is fixedly assembled at the other end of the first guide roller 10. As Figure 5 shown, there are two first movable plates 34. The two first movable plates 34 are located in the first cavity 20 and are respectively on both sides of the axis of the first guide roller 10. The end of the fixed rod 25 away from the machine frame 1 is located in the first cavity 20. A fixed frame 35 is fixedly installed on the fixed rod 25 located in the first cavity 20. A gap is formed between the outer peripheral surface of the fixed frame 35 and the inner peripheral surface of the first guide roller 10. The first movable plate 34 and a mounting plate 36 are arranged in the gap. Both the first movable plate 34 and the mounting plate 36 are fan-shaped plates. The length of the first movable plate 34 and the mounting plate 36 in the axial direction of the first guide roller 10 is equal to the axial length of the first cavity 20. When the outer peripheral surface of the first movable plate 34 is attached to the inner peripheral surface of the first guide roller 10 and the inner peripheral surface of the mounting plate 36 is attached to the outer peripheral surface of the fixed frame 35, the axes of the first movable plate 34 and the mounting plate 36 coincide with the axis of the first guide roller 10. As Figure 6As shown, the fixed end of the linear actuator six 16 extending horizontally and transversely is fixed on the mounting plate 36. The output end of the linear actuator six 16 is fixedly connected to the movable plate one 34, so that the movable plate one 34 is slidably assembled on the mounting plate 36 horizontally; an arc-shaped chute 37 with an axis coinciding with the guide roller one 10 is provided on the mounting plate 36. A slider 38 adapted to the arc-shaped chute 37 is provided on the fixed frame 35. The slider 38 is engaged in the arc-shaped chute 37. The mounting plate 36 is slidably assembled on the fixed frame 35 through the motor four 9. The motor four 9 is fixedly assembled on the fixed frame 35. A gear 39 is fixedly provided on the output shaft of the motor four 9. Teeth 40 meshing with the gear 39 are fixedly provided on the mounting plate 36. When the motor four 9 is started, through the mutual cooperation of the gear 39 and the teeth 40, the mounting plate 36 slides along the arc-shaped chute 37. The linear actuator six 16 drives the movable plate one 34 so that the outer peripheral surface of the movable plate one 34 contacts the inner peripheral surface of the cavity one 20. The motor four 9 is adjusted so that the inner peripheral surface of the cavity one 20 corresponding to the side wall of the guide roller one 10 contacting the thin film or label paper is located between the movable plates one 34. All the through holes one 22 on the side wall of the guide roller one 10 contacting the thin film or label paper form the adsorption port one.

[0050] The adsorption assembly two includes a negative pressure container 41 slidably assembled up and down on the frame 1, two movable plates two 42 for cooperating with the negative pressure container 41 to form the adsorption port two, and a linear actuator eight 18 for driving the movable plate two 42 to move to change the size of the adsorption port two. As Figure 7 and Figure 8 shown, the negative pressure container 41 has a cavity two 21 inside. The top surface of the negative pressure container 41 is a downwardly concave arc surface; a plurality of through holes two 23 communicating with the cavity two 21 are provided at the top of the negative pressure container 41. A vacuum pump two 33 is fixedly assembled on the negative pressure container 41; the negative pressure container 41 is fixedly assembled on the movable seat two 43. Referring to Figure 2 , the movable seat two 43 is slidably assembled up and down on the frame 1 through the linear actuator seven 17. The fixed end of the linear actuator seven 17 is vertically fixedly assembled on the frame 1. The output end of the linear actuator seven 17 is fixedly connected to the movable seat two 43; the top surface of the movable plate two 42 is attached to the inner top surface of the cavity two 21. The fixed ends of two symmetrically arranged linear actuators eight 18 are fixedly assembled on the negative pressure container 41. The movable plate two 42 is fixedly connected to the output end of the linear actuator eight 18. The driving direction of the linear actuator eight 18 is the same as the extending direction of the axis of the guide roller one 10. All the through holes two 23 on the negative pressure container 41 that are opposite to the thin film and label paper between the clamping plate one 28 and the clamping plate two 29 and not attached to the movable plate two 42 form the adsorption port two.

[0051] The material receiving module includes a rotating shaft two 3 rotatably assembled on the frame 1. The rotating shaft two 3 is driven by a motor two 7 fixedly installed on the frame 1. The rotating shaft two 3 is used for winding the label paper covered with the thin film, and a torque sensor is assembled on the rotating shaft two 3.

[0052] A method for surface laminating in the production of laser anti-counterfeiting labels, comprising the following steps:

[0053] ① Assemble the label paper and the film on the frame 1; fixedly install the label paper roll and the film roll on two first rotating shafts 2 respectively, adjust the third linear actuator 13 so that the first guiding roller 10 is located at a predetermined position, wind the label paper and the film paper around the second guiding roller 19 and the first guiding roller 10. In this embodiment, the film is in contact with the outer peripheral surface of the first guiding roller 10, and the label paper and the film arranged in a laminated and adhered manner pass through the gaps between the first clamping plates 28 and between the second clamping plates 29 and are wound up by the second rotating shaft 3; under the action of the torque sensor, adjust the first motor 6 and the second motor 7 so that a predetermined tension is generated between the label paper and the film, and the label paper and the film located between the heating plate 4 and the supporting plate 5 are laminated and adhered and parallel to the working surfaces of the heating plate 4 and the supporting plate 5;

[0054] ② Heat and paste the film on the label paper; adjust the first linear actuator 11 and the second linear actuator 12, the heating plate 4 and the supporting plate 5 are respectively in contact with the label paper and the film and maintain a predetermined pressure, control the heating plate 4 to maintain a predetermined temperature, and keep the state of constant temperature and constant pressure for a predetermined time, then the heating plate 4 and the supporting plate 5 are separated from the film and the label paper respectively; start the first motor 6 and the second motor 7, move the label paper with the laminated film out from between the heating plate 4 and the supporting plate 5, and cool it during the process of feeding it to the first guiding roller 10;

[0055] ③ Detect whether the film is fixedly pasted on the label paper; when the label paper with the laminated film is wound around the first guiding roller 10, adjust the third motor 8 with reference to the detection value of the distance sensor 31 so that the clamping surface of the first clamping plate 28 is parallel to the film and the label paper between the first clamping plates 28, and the clamping surface of the second clamping plate 29 is parallel to the film and the label paper between the second clamping plates 29, adjust the fourth linear actuator 14 and the fifth linear actuator 15 so that the two first clamping plates 28 fixedly clamp the film and the label paper between the first clamping plates 28, and the two second clamping plates 29 fixedly clamp the film and the label paper between the second clamping plates 29; adjust the third linear actuator 13 to move the first guiding roller 10 upward, so that the tension of the film and the label paper between the first clamping plate 28 and the second clamping plate 29 is zero, and the indication of the torque sensor remains unchanged;

[0056] Start the first vacuum pump 32 so that the pressure in the first cavity 20 is less than the atmospheric pressure, and the first cavity 20 generates a suction force towards the axis direction of the first guiding roller 10 on the film through the first adsorption port; adjust the third linear actuator 13 to drive the first moving seat 24 to move upward, and under the action of the first vacuum pump 32, the film attached to the first adsorption port moves upward synchronously with the first guiding roller 10;

[0057] Adjust the linear actuator seven 17 to move the negative pressure container 41 upward, adjust the linear actuator eight 18. All the through holes two 23 on the negative pressure container 41 between the two movable plates two 42 form the adsorption port two. The width of the adsorption port two along the axis direction of the guide roller one 10 is the same as the width of the label paper. The adsorption port two is opposite to the label paper up and down. Start the vacuum pump two 33. The pressure in the cavity two 21 is less than the atmospheric pressure. The cavity two 21 generates a suction force that drives the label paper downward through the through holes two 23.

[0058] Observe the situation of the film and the label paper between the guide roller one 10 and the negative pressure container 41. If the film is adsorbed on the guide roller one 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, and it is necessary to stop the machine in time to 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 to move the guide roller one 10 and the negative pressure container 41 downward, and the guide roller one 10 returns to the predetermined position in step ①. Adjust the linear actuator four 14 and the linear actuator five 15 to loosen the film and the label paper with the clamping plate one 28 and the clamping plate two 29. The reading of the torque sensor remains unchanged, and the rotating shaft one 2 and the rotating shaft two 3 rotate a predetermined angle, and then the next detection is carried out.

[0059] The linear actuator one 11, the linear actuator two 12, the linear actuator three 13, the linear actuator four 14, the linear actuator five 15, the linear actuator six 16, the linear actuator seven 17, and the linear actuator eight 18 are all electric push rods or hydraulic rods. The motor one 6, the motor two 7, the motor three 8, and the motor four 9 are stepping motors or servo motors. The PLC is assembled on the frame 1. The control ends of the linear actuator one 11, the linear actuator two 12, the linear actuator three 13, the linear actuator four 14, the linear actuator five 15, the linear actuator six 16, the linear actuator seven 17, and the linear actuator eight 18 are connected to the output end of the PLC. The distance sensor 31 and the torque sensor are connected to the input end of the PLC.

[0060] In order to improve the degree of automation, a vision sensor is assembled on the moving seat two 43. The vision sensor is connected to the input end of the PLC. The vision sensor is used to capture and analyze the images of the film and the label paper between the guide roller one 10 and the negative pressure container 41. If the vision sensor detects that the film and the label paper are separated or there are obvious appearance defects such as bubbles and wrinkles on the film-covered label paper, the PLC controls the device to stop 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 guide roller 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.

Images