An adhesive label laminating apparatus and method

Abstract

The application relates to the technical field of self-adhesive label production, and discloses a self-adhesive label film covering device and method, which comprises a detection mechanism one located between a hot pressing roller and a winding roller, the detection mechanism one comprises a fixed box, movable rods and a pressing plate, the fixed box is fixed on a mounting plate, the movable rods are arranged in a plurality of groups and all penetrate through the fixed box, the bottom ends of the movable rods are provided with the pressing plate, a gas storage cavity is formed in the pressing plate, a gap is arranged at the bottom of the pressing plate, the gap is communicated with the gas storage cavity, a gas pressure sensor is arranged in the gas storage cavity, and a gas filling pump for filling gas into the gas storage cavity is arranged on the pressing plate. The detection mechanism one integrating the gas pressure sensing and displacement sensing is arranged, the bubble and indentation defects are converted into the gas pressure and displacement signals which can be accurately quantified for detection, compared with the traditional visual detection, the method is less disturbed by the environment, and the identification precision and reliability of the micro and internal defects are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of self-adhesive label production technology, specifically to a self-adhesive label laminating device and method. Background Technology

[0002] Self-adhesive labels, as a composite material, use paper, film, or other special materials as the face stock, coated with adhesive on the back, and with silicone-coated release paper as the backing. They offer advantages such as no need for glue or water application, pollution-free application, and quick processing, and are widely used in logistics, packaging, retail, and industrial signage. To enhance the durability, scratch resistance, moisture resistance, and appearance of self-adhesive labels, a transparent film is often applied to their surface (i.e., lamination). This film significantly expands the label's applicability and environmental adaptability through physical protection and functional enhancement.

[0003] However, there are still several technical challenges and quality risks in the lamination process: First, air bubbles may remain between the label and the film after lamination, affecting the appearance and uniformity of the adhesion; second, dust or impurities may adhere to the film surface, which may cause indentations during subsequent winding processes, resulting in defects on the label surface; third, the adhesion strength between the film and the self-adhesive label may be insufficient, easily leading to delamination or edge lifting, reducing product reliability.

[0004] Currently, the industry commonly uses visual inspection methods to monitor and identify defects in the film lamination process. However, this method is limited by factors such as lighting conditions, image resolution, film transmittance, and surface reflectivity. It has low sensitivity in detecting defects such as microbubbles, shallow indentations, and insufficient adhesive strength, making accurate and stable real-time identification difficult. Furthermore, vision systems lack effective detection capabilities for hidden defects within the lamination interface, easily leading to missed defects and impacting overall production quality and efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a self-adhesive label laminating device and method to improve the accuracy and reliability of film defect detection.

[0006] The objective of this invention can be achieved through the following technical solutions: A self-adhesive label laminating device includes a mounting plate, an unwinding roller, an unwinding roller 2, a hot press roller, and a take-up roller. The device also includes a detection mechanism 1 located between the hot press roller and the take-up roller. The detection mechanism 1 includes a fixed box, movable rods, and a pressure plate. The fixed box is fixed to the mounting plate. Several movable rods are provided, all penetrating the fixed box. A pressure plate, which is trapezoidal in shape, is installed at the bottom of each movable rod. A fixing ring is provided on the portion of the movable rod inside the fixed box. An elastic element connects the fixing ring and the fixed box. An air storage chamber is formed within the pressure plate. A notch is provided at the bottom of the pressure plate, communicating with the air storage chamber. After the self-adhesive label and film pass through the hot press roller, they abut against the bottom of the pressure plate, blocking the notch. A pressure sensor is installed inside the air storage chamber. An air pump for inflating the air storage chamber is installed on the pressure plate. An air blowing pump is installed on the mounting plate, located between the hot press roller and the detection mechanism 1.

[0007] As a further aspect of the present invention, sealing plates are movably installed at both ends of the notch.

[0008] As a further aspect of the present invention: a fixing plate is provided on the movable rod, and a displacement sensor is installed on the top of the fixing box, with the displacement sensor facing the fixing plate.

[0009] As a further embodiment of the present invention: a second detection mechanism and an auxiliary mechanism are mounted on the mounting plate. The second detection mechanism and the auxiliary mechanism are located between the first detection mechanism and the take-up roller. The second detection mechanism is closer to the first detection mechanism, and the auxiliary mechanism is closer to the take-up roller. The second detection mechanism includes two sets of rotating drums and two sets of arc-shaped plates. The two sets of rotating drums are rotatably mounted on the mounting plate. The arc-shaped plates are fixed on the mounting plate. The rotating drums are sleeved around the arc-shaped plates. Several through holes are opened around the rotating drums. Two sets of sealing plates are symmetrically slidably mounted inside the arc-shaped plates. A bidirectional screw is rotatably mounted on the mounting plate. The bidirectional screw passes through the rotating drums. Both sets of sealing plates are threadedly connected to the bidirectional screw. An air suction pipe is connected to one set of sealing plates. The air suction pipe is connected to an external air suction pump. A negative pressure chamber is formed between the two sets of sealing plates, the arc-shaped plates, and the rotating drums. The through holes on the rotating drums that are in contact with the non-adhesive label and the film communicate with the negative pressure chamber. A vision sensor is mounted on the mounting plate.

[0010] As a further embodiment of the present invention: the auxiliary mechanism includes a chute, a slide plate and guide rollers. The mounting plate is provided with a chute, and a slide plate is slidably installed in the chute. Two sets of guide rollers are rotatably installed on the slide plate. The other end of the two sets of guide rollers is provided with a fixing block. An elastic element is connected between the slide plate and the chute. Several extrusion plates are provided around one of the rotating cylinders. The fixing block is located on the rotation path of the extrusion plates.

[0011] As a further embodiment of the present invention: two sets of tension rollers one and two sets of tension rollers two are respectively installed on the mounting plate, the two sets of tension rollers one are located between the detection mechanism one and the detection mechanism two, and the two sets of tension rollers two are located between the auxiliary mechanism and the winding roller.

[0012] As a further embodiment of the present invention: the ends of unwinding roller 1, unwinding roller 2, hot press roller, rotating drum, tensioning roller 1 and tensioning roller 2 are all equipped with driving components to drive their rotation, and the ends of the two rotating drums are provided with transmission components. The driving components are connected to the transmission components on one of the rotating drums, and the two rotating drums are connected to each other through two sets of transmission components.

[0013] A lamination method for a self-adhesive label laminating apparatus, the method being applied to the self-adhesive label laminating apparatus as described above, the method comprising the following steps: Step S1: Material preparation and hot pressing. The self-adhesive label roll and the film roll are respectively installed on unwinding roller 2 and unwinding roller 1. The materials are drawn out together and passed through the hot pressing roller for heating and pressing to achieve preliminary lamination. Step S2: Surface pretreatment and preliminary inspection, the composite product is cleaned and cooled by blowing air pump, and then its surface is moved to the bottom of the pressure plate of the inspection mechanism. Step S3: Online detection of bubbles and indentations. The displacement of the pressure plate is monitored in real time by a displacement sensor to determine whether bubbles exist. At the same time, the pressure change in the air storage chamber is monitored in real time by a pressure sensor to determine whether indentations exist. If any defect is detected, the control device will stop. Step S4: Online detection of adhesion strength. The product that has passed the preliminary test is passed through the two sets of rotating drums of the detection mechanism in a relaxed state. The negative pressure adsorption of the product is started, and the visual sensor monitors whether the film and the self-adhesive label of the product separate due to the adsorption force when passing through the rotating drum. If separation occurs, it is determined that the adhesion is not strong and the device is controlled to stop. Step S5: Stress relief, secondary cleaning and final treatment. The auxiliary driving mechanism causes the product to shake periodically to shake off impurities and eliminate internal stress. At the same time, the negative pressure adsorption of the rotating drum sucks away the fallen impurities. Then the product is rolled twice by the tension roller to enhance adhesion. Finally, the winding roller completes the winding.

[0014] The beneficial effects of this invention are: (1) In this invention, by setting up a detection mechanism that integrates air pressure sensing and displacement sensing, the bubble and indentation defects are converted into air pressure and displacement signals that can be accurately quantified for detection. Compared with traditional visual inspection, this method is less affected by environmental interference and significantly improves the accuracy and reliability of identifying small and internal defects.

[0015] (2) In this invention, the negative pressure adsorption and separation test method of the second detection mechanism is adopted. By actively applying separation force to the coated product and observing with a visual sensor, the defect of poor adhesion between the self-adhesive label and the film can be detected intuitively and effectively. The test results are accurate and easy to judge.

[0016] (3) In this invention, the air pump is used to blow the film surface before testing, which can not only remove the attached dust and impurities to avoid them interfering with the testing or causing secondary indentation, but also the cooling effect helps to enhance the initial bonding strength, creating good conditions for subsequent accurate testing.

[0017] (4) In this invention, the auxiliary mechanism and the rotating drum are linked to make the coated product shake periodically. This action can shake off the residual impurities on the surface and be further adsorbed and removed by the negative pressure chamber of the rotating drum. On the other hand, it can homogenize and release the internal stress of the material. With the secondary rolling pressure of the subsequent tensioning roller, the adhesion force that may have been reduced due to the detection of the pull is effectively restored, ensuring the quality of the final product.

[0018] (5) In this invention, by setting the speed difference between the tension roller and the take-up roller, the film-coated product in the detection section is in a controllable relaxed state, which not only eliminates the need for complex tension adjustment, but also provides the necessary operating space for the detection mechanism to perform effective separation testing, making the system operation more stable and efficient. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the detection mechanism in this invention; Figure 3 This is a schematic diagram of the internal structure of the pressure plate in this invention; Figure 4 This is a schematic diagram of the detection mechanism 2 and the auxiliary mechanism in this invention; Figure 5 This is a schematic diagram of the second detection mechanism in this invention; Figure 6 This is a schematic diagram of the structure after the rotating cylinder and the arc plate are separated in this invention.

[0021] In the picture: 1. Mounting plate; 2. Unwinding roller one; 3. Unwinding roller two; 4. Hot press roller; 5. Rewinding roller; 6. Detection mechanism one; 61. Fixing box; 62. Movable rod; 621. Fixing ring; 622. Elastic element one; 623. Fixing plate; 63. Pressure plate; 631. Air storage chamber; 632. Notch; 633. Sealing plate; 64. Air pump; 65. Air pressure sensor; 66. Displacement sensor; 7. Detection mechanism two; 71. Rotary drum; 711. Through hole; 712. Transmission component; 713. Extrusion plate; 72. Arc plate; 73. Sealing plate; 74. Bidirectional screw; 75. Suction pipe; 8. Auxiliary mechanism; 81. Slide groove; 82. Slide plate; 83. Elastic element two; 84. Guide roller; 85. Fixing block; 9. Tensioning roller one; 10. Tensioning roller two; 11. Air pump; 12. Vision sensor. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-3 As shown, a self-adhesive label laminating device includes a mounting plate 1, an unwinding roller 2, an unwinding roller 3, a hot press roller 4, and a take-up roller 5. The device also includes a detection mechanism 6 located between the hot press roller 4 and the take-up roller 5. The detection mechanism 6 includes a fixed box 61, movable rods 62, and pressure plates 63. The fixed box 61 is fixed to the mounting plate 1. Several movable rods 62 are provided, all penetrating the fixed box 61. Pressure plates 63, which are inverted trapezoidal in shape, are provided at the bottom ends of the movable rods 62. The portion of the movable rods 62 located inside the fixed box 61 is provided with a fixing... Ring 621, a retaining ring 621 and a retaining box 61 are connected by an elastic element 622. The pressure plate 63 has an air storage chamber 631. The bottom of the pressure plate 63 has a notch 632, which communicates with the air storage chamber 631. The self-adhesive label and film pass through the hot press roller 4 and abut against the bottom of the pressure plate 63 and block the notch 632. An air pressure sensor 65 is installed in the air storage chamber 631. An air pump 64 is installed on the pressure plate 63 to inflate the air storage chamber 631. An air blowing pump 11 is installed on the mounting plate 1. The air blowing pump 11 is located between the hot press roller 4 and the detection mechanism 6.

[0024] Both ends of the gap 632 are movably fitted with sealing plates 633.

[0025] A fixing plate 623 is provided on the movable rod 62, and a displacement sensor 66 is installed on the top of the fixing box 61, with the displacement sensor 66 facing the fixing plate 623.

[0026] In practical application, the self-adhesive label on the unwinding roller 23 and the film on the unwinding roller 12 are pulled out and passed through two sets of hot press rollers 4. After being hot-pressed by the two sets of hot press rollers 4, the self-adhesive label and the film are bonded together. Then the film is pressed against the bottom of the pressure plate 63 and finally wound up by the take-up roller 5. During the movement of the adhesive label and film, if air bubbles are present on the film, the bubbles will contact the bottom of the pressure plate 63, causing the pressure plate 63 to move upwards. This, in turn, causes several movable rods 62 to move upwards. The displacement sensor 66 monitors the distance between the rods and the fixed plate 623 in real time, thus detecting the presence of air bubbles on the film. At this point, the system's processor controls the machine to stop, facilitating the cutting or replacement of the areas with air bubbles. If there are indentations on the film, when the indented area moves to the notch 632 at the bottom of the pressure plate 63, the air storage chamber 631, the notch 632, and the indentation shape... As the volume of the enclosed space increases, the internal pressure decreases. The pressure sensor 65 monitors the pressure in real time, detecting indentations on the film. At this point, the system's processor controls the shutdown, allowing for the cutting or replacement of the indented areas of the film. In summary, by using the real-time monitoring of the displacement sensor 66 and the pressure sensor 65, the presence of bubbles and indentations is detected numerically. This method can accurately detect bubbles and indentations, and compared to vision system inspection, it is more accurate and stable, avoiding missed detections and ensuring production quality and efficiency. By adjusting the two sets of sealing plates 633, the length of the notch 632 is made to match the width of the film, thereby enabling the overall inspection of the film surface and further ensuring the accuracy of the inspection results. The elastic force of the elastic element 622 ensures that the bottom of the pressure plate 63 is always in contact with the surface of the film, thereby ensuring the sealing of the sealed space formed by the gas storage chamber 631 and the notch 632, and further ensuring the accuracy of the test results. Before the film moves to the testing unit 6, cold air is blown onto the film surface by the air pump 11. This not only enhances the adhesion between the non-adhesive label and the film, thus ensuring the accuracy of subsequent test results, but also removes dust and impurities from the film surface, further ensuring the accuracy of the detection of bubbles and indentations on the film. At the same time, it can also remove impurities embedded in the indentation, preventing impurities from blocking the indentation, and further ensuring the accuracy of the test results.

[0027] like Figures 1-6As shown, a second detection mechanism 7 and an auxiliary mechanism 8 are installed on the mounting plate 1. The second detection mechanism 7 and the auxiliary mechanism 8 are located between the first detection mechanism 6 and the take-up roller 5. The second detection mechanism 7 is closer to the first detection mechanism 6, and the auxiliary mechanism 8 is closer to the take-up roller 5. The second detection mechanism 7 includes two sets of rotating drums 71 and two sets of arc-shaped plates 72. The two sets of rotating drums 71 are rotatably mounted on the mounting plate 1, and the arc-shaped plates 72 are fixed on the mounting plate 1. The rotating drums 71 are sleeved around the arc-shaped plates 72. Several through holes 711 are opened on the outer periphery of the rotating drums 71. The arc-shaped plates 72 are... Two sets of sealing plates 73 are symmetrically slidably installed. A bidirectional screw 74 is rotatably installed on the mounting plate 1, and the bidirectional screw 74 passes through the rotating cylinder 71. Both sets of sealing plates 73 are threadedly connected to the bidirectional screw 74. One set of sealing plates 73 is connected to an air suction pipe 75, which is connected to an external air suction pump. A negative pressure chamber is formed between the two sets of sealing plates 73, the arc plate 72, and the rotating cylinder 71. The through hole 711 on the rotating cylinder 71, which is in contact with the non-adhesive label and film, is connected to the negative pressure chamber. A vision sensor 12 is installed on the mounting plate 1.

[0028] Two sets of tension rollers 9 and two sets of tension rollers 10 are respectively installed on the mounting plate 1. The two sets of tension rollers 9 are located between the detection mechanism 6 and the detection mechanism 7, and the two sets of tension rollers 10 are located between the auxiliary mechanism 8 and the winding roller 5.

[0029] The ends of unwinding roller 1 2, unwinding roller 2 3, hot press roller 4, rotating drum 71, tensioning roller 1 9 and tensioning roller 2 10 are all equipped with driving components to drive their rotation. The ends of the two rotating drums 71 are provided with transmission components 712. The driving component is connected to the transmission component 712 on one of the rotating drums 71. The two rotating drums 71 are connected by two sets of transmission components 712.

[0030] In practical application, the self-adhesive label and film pass through the detection mechanism 6, then through two sets of tension rollers 9, two sets of rotating drums 71, and two sets of tension rollers 10 before being wound up by the take-up roller 5. The tension roller 9 drives the self-adhesive label and film to move faster than the take-up roller 5, which makes the self-adhesive label and film in the interval between the tension rollers 9 and 10 relaxed. This eliminates the need for tension adjustment of the take-up roller 5 and facilitates the detection mechanism 7 to test whether the self-adhesive label and film are firmly adhered. During testing, the external suction pump is activated, placing both negative pressure chambers under negative pressure. When the self-adhesive label and film move to the rotating drum 71, they are attracted to the two sets of rotating drums 71 through several through-holes 711. If the adhesive strength of the self-adhesive label and film is sufficient, they will continue to move under the drive of the tension roller 10 and be wound up by the winding roller 5. If the adhesive strength is insufficient, the upper rotating drum 71 will hold the film and move it a certain distance, while the lower rotating drum 71 will hold the film. The adhesive label moves a certain distance, allowing it to separate from the film. Feedback from the vision sensor 12 then detects whether the adhesive label and film are firmly bonded. If they separate, the system's processor stops the machine, facilitating the cutting or replacement of the film and label. This method of testing the adhesive strength by observing whether the adhesive label and film separate under external force provides a quick and intuitive view of the results, making the testing more accurate and stable. In addition, under the suction of the negative pressure chamber, if there are dust or other impurities on the surface of the self-adhesive label and film, these impurities will enter the negative pressure chamber under the suction force, thereby cleaning the surface of the self-adhesive label and film that is about to be rolled up. This prevents impurities from causing indentations or scratches on the self-adhesive label and film after winding, thus improving product quality.

[0031] Furthermore, the auxiliary mechanism 8 includes a chute 81, a slide plate 82, and guide rollers 84. The mounting plate 1 has a chute 81, and the slide plate 82 is slidably installed in the chute 81. Two sets of guide rollers 84 are rotatably installed on the slide plate 82. The other end of the two sets of guide rollers 84 is provided with a fixing block 85. An elastic element 83 connects the slide plate 82 and the chute 81. Several extrusion plates 713 are provided around one of the rotating cylinders 71. The fixing block 85 is located on the rotation path of the extrusion plates 713.

[0032] In practical application, during the rotation of the drum 71, the extrusion plate 713 presses the fixed block 85 downwards. After the extrusion plate 713 passes the fixed block 85, the elastic element 83 rebounds, causing the slide plate 82 to move upwards. This causes the slide plate 82 to drive the two sets of guide rollers 84 to move downwards first and then quickly upwards, thus creating an intermittent shaking motion on the self-adhesive label and film. On the one hand, this can enhance the removal of impurities from the surface of the self-adhesive label and film. On the other hand, since the self-adhesive label and film have been pulled by the two sets of drums 71, although the self-adhesive label and film have passed the adhesive strength test, the adhesive strength of the two sets will inevitably decrease after being pulled. By shaking the self-adhesive label and film, the self-adhesive label and film bend up and down, thereby making the internal stress of the self-adhesive label and film uniform. When passing through the two sets of tension rollers 10, the self-adhesive label and film can be rolled again, thereby restoring the adhesive strength of the self-adhesive label and film and avoiding the problem of wrinkles caused by the decrease in adhesive strength during subsequent rolling.

[0033] Working principle: First, the self-adhesive label on unwinding roller 23 and the film on unwinding roller 12 are drawn out and passed together through two sets of hot press rollers 4 for hot pressing and bonding. The bonded product then passes through air pump 11, detection mechanism 16, two sets of tension rollers 19, detection mechanism 27, auxiliary mechanism 8, and two sets of tension rollers 20 in sequence, and is finally wound up by take-up roller 5.

[0034] During the bubble and indentation detection stage, the coated product moves and presses against the bottom of the pressure plate 63 of the detection mechanism. If an bubble is present, it will push up the pressure plate 63, causing the movable rod 62 to move upward. The displacement of the fixed plate 623 can be monitored by the displacement sensor 66 to determine the defect. If an indentation is present, when it passes through the notch 632 of the pressure plate 63, it will change the volume of the sealed space formed by the air storage chamber 631, the notch 632, and the product surface. The air pressure sensor 65 can detect the abnormal change in air pressure to determine the defect. After a defect is detected, the system will shut down for processing.

[0035] During the adhesion strength testing stage, the laminated product enters the testing mechanism 7. An external suction pump is activated, creating suction in the negative pressure chamber inside the rotating drum 71, drawing the product onto the surface of the drum 71 through the through-hole 711. The tension roller 9 drives the self-adhesive label and film to move at a speed faster than the winding roller 5, causing the product in the testing section to loosen. If the product is not firmly adhered, the suction force of the upper and lower rotating drums 71 will partially pull the film away from the self-adhesive label, causing separation. This phenomenon is captured by the vision sensor 12 and judged as unqualified, triggering a shutdown.

[0036] During the stress relief and cleaning stage, as the drum 71 rotates, the outer pressing plate 713 periodically presses down on the fixed block 85 of the auxiliary mechanism 8, causing the slide plate 82 to drive the guide roller 84 to move downwards and then quickly rebound, thereby shaking the product. This shaking helps to shake off impurities and be sucked away by the negative pressure chamber of the drum 71, while simultaneously bending the product to even out internal stress. Subsequently, the product is rolled again when passing through the tension roller 10, restoring and enhancing the bonding strength, and finally neatly wound up by the take-up roller 5.

[0037] A lamination method for a self-adhesive label laminating apparatus, the method being applied to the self-adhesive label laminating apparatus as described above, the method comprising the following steps: Step S1: Material preparation and hot pressing. The self-adhesive label roll and the film roll are respectively installed on the unwinding roller 3 and the unwinding roller 2. The materials are drawn out together and pass through the hot pressing roller 4 for heating and pressing to achieve preliminary lamination. Step S2: Surface pretreatment and preliminary inspection, the composite product is cleaned and cooled by air blowing pump 11, and then its surface is moved to the bottom of the pressure plate 63 of the inspection mechanism 6. Step S3: Online detection of bubbles and indentations. The displacement sensor 66 monitors the displacement of the pressure plate 63 in real time to determine whether bubbles exist. At the same time, the air pressure sensor 65 monitors the air pressure change in the air storage chamber 631 in real time to determine whether indentations exist. If any defect is detected, the control device stops. Step S4: Online detection of adhesion strength. The product that has passed the preliminary test is passed through the two sets of rotating drums 71 of the detection mechanism 2 7 in a relaxed state. The negative pressure adsorption of the product is started, and the visual sensor 12 monitors whether the film and the self-adhesive label of the product separate due to adsorption force when passing through the rotating drum 71. If separation occurs, it is determined that the adhesion is not strong and the device is controlled to stop. Step S5: Stress relief, secondary cleaning and final treatment. The auxiliary driving mechanism 8 causes the product to shake periodically to shake off impurities and eliminate internal stress. At the same time, the negative pressure adsorption of the rotating drum 71 sucks away the fallen impurities. Then the product is rolled twice by the tension roller 10 to enhance adhesion. Finally, the winding roller 5 completes the winding.

Claims

1. A self-adhesive label laminating device, comprising a mounting plate (1), an unwinding roller one (2), an unwinding roller two (3), a hot press roller (4), and a take-up roller (5), characterized in that, The device further includes a detection mechanism (6), which is located between the hot press roller (4) and the take-up roller (5). The detection mechanism (6) includes a fixed box (61), movable rods (62), and pressure plates (63). The fixed box (61) is fixed on the mounting plate (1). The movable rods (62) are provided with several rods, all of which pass through the fixed box (61). Pressure plates (63) are provided at the bottom ends of the movable rods (62). The pressure plates (63) are inverted trapezoidal. The part of the movable rods (62) located inside the fixed box (61) is provided with a fixing ring (621). The fixing ring (621) is connected to the fixed box (61). An elastic element (622) is connected to the pressure plate (63), which has an air storage chamber (631) and a notch (632) at the bottom. The notch (632) communicates with the air storage chamber (631). After the self-adhesive label and film pass through the hot press roller (4), they abut against the bottom of the pressure plate (63) and block the notch (632). A pressure sensor (65) is installed in the air storage chamber (631). An air pump (64) for filling the air storage chamber (631) is installed on the pressure plate (63). An air blowing pump (11) is installed on the mounting plate (1). The air blowing pump (11) is located between the hot press roller (4) and the detection mechanism (6).

2. The self-adhesive label laminating device according to claim 1, characterized in that, Both ends of the notch (632) are movably fitted with sealing plates (633).

3. The self-adhesive label laminating device according to claim 1, characterized in that, A fixing plate (623) is provided on the movable rod (62), and a displacement sensor (66) is installed on the top of the fixing box (61). The displacement sensor (66) is facing the fixing plate (623).

4. The self-adhesive label laminating device according to claim 1, characterized in that, The mounting plate (1) is equipped with a second detection mechanism (7) and an auxiliary mechanism (8). The second detection mechanism (7) and the auxiliary mechanism (8) are located between the first detection mechanism (6) and the take-up roller (5). The second detection mechanism (7) is close to the first detection mechanism (6), and the auxiliary mechanism (8) is close to the take-up roller (5). The second detection mechanism (7) includes two sets of rotating drums (71) and two sets of arc plates (72). The two sets of rotating drums (71) are rotatably mounted on the mounting plate (1). The arc plates (72) are fixed on the mounting plate (1). The rotating drums (71) are sleeved around the arc plates (72). Several through holes (711) are opened around the rotating drums (71). (72) Two sets of sealing plates (73) are symmetrically slidably installed inside. A bidirectional screw (74) is rotatably installed on the mounting plate (1). The bidirectional screw (74) passes through the rotating cylinder (71). Both sets of sealing plates (73) are threadedly connected to the bidirectional screw (74). One set of sealing plates (73) is connected to a suction pipe (75). The suction pipe (75) is connected to an external suction pump. A negative pressure chamber is formed between the two sets of sealing plates (73), the arc plate (72), and the rotating cylinder (71). The through hole (711) on the rotating cylinder (71) that is in contact with the non-adhesive label and the film is connected to the negative pressure chamber. A vision sensor (12) is installed on the mounting plate (1).

5. The self-adhesive label laminating device according to claim 4, characterized in that, The auxiliary mechanism (8) includes a chute (81), a slide plate (82), and guide rollers (84). The mounting plate (1) has a chute (81) and a slide plate (82) is slidably installed in the chute (81). Two sets of guide rollers (84) are rotatably installed on the slide plate (82). The other end of the two sets of guide rollers (84) is provided with a fixing block (85). An elastic element (83) is connected between the slide plate (82) and the chute (81). Several extrusion plates (713) are provided around one of the rotating cylinders (71). The fixing block (85) is located on the rotation path of the extrusion plate (713).

6. The self-adhesive label laminating device according to claim 5, characterized in that, Two sets of tension rollers (9) and two sets of tension rollers (10) are respectively installed on the mounting plate (1). The two sets of tension rollers (9) are located between the detection mechanism (6) and the detection mechanism (7), and the two sets of tension rollers (10) are located between the auxiliary mechanism (8) and the winding roller (5).

7. The self-adhesive label laminating device according to claim 6, characterized in that, The ends of unwinding roller 1 (2), unwinding roller 2 (3), hot press roller (4), rotating drum (71), tensioning roller 1 (9) and tensioning roller 2 (10) are all equipped with drive components to drive their rotation. The ends of the two rotating drums (71) are equipped with transmission components (712). The drive components are connected to the transmission components (712) on one of the rotating drums (71). The two rotating drums (71) are connected by two sets of transmission components (712).

8. A lamination method for a self-adhesive label lamination device, characterized in that, The method is applied to the self-adhesive label laminating apparatus as described in any one of claims 1-7 above, and the method includes the following steps: Step S1: Material preparation and hot pressing. The self-adhesive label roll and the film roll are respectively installed on the unwinding roller 2 (3) and the unwinding roller 1 (2). The materials are drawn out together and pass through the hot pressing roller (4) for heating and pressing to achieve preliminary bonding. Step S2: Surface pretreatment and preliminary inspection, the composite product is cleaned and cooled by blowing air pump (11), and then its surface is moved to the bottom of the pressure plate (63) of the inspection mechanism (6); Step S3: Online detection of bubbles and indentations. The displacement of the pressure plate (63) is monitored in real time by the displacement sensor (66) to determine whether there are bubbles. At the same time, the air pressure change in the air storage chamber (631) is monitored in real time by the air pressure sensor (65) to determine whether there are indentations. If any defect is detected, the control device will stop. Step S4: Online detection of adhesive strength. The product that has passed the preliminary test is passed through the two sets of rotating drums (71) of the detection mechanism (7) in a relaxed state. The negative pressure adsorption of the product is started, and the visual sensor (12) monitors whether the film and the self-adhesive label of the product separate due to adsorption force when passing through the rotating drum (71). If separation occurs, it is determined that the adhesion is not strong and the device is controlled to stop. Step S5: Stress relief, secondary cleaning and final treatment. Drive the auxiliary mechanism (8) to make the product shake periodically to shake off impurities and eliminate internal stress. At the same time, the negative pressure adsorption of the rotating drum (71) sucks away the fallen impurities. Then the product is rolled twice by the tension roller (10) to enhance adhesion. Finally, the winding roller (5) completes the winding.

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