Sealing label paper film covering processing device

Abstract

The invention discloses a sealing label paper film covering processing device which comprises a rack mechanism, an unwinding mechanism, a tensioning mechanism, a coating mechanism, a guiding mechanism, a pressing mechanism, a bubble removing mechanism and a winding mechanism. The unwinding mechanism drives a thin film unwinding roller and a seal paper unwinding roller to realize synchronous unwinding through a servo motor; the coating mechanism heats a glue solution through a heating seat, a coating roller uniformly coats the glue solution, and a compression roller ensures the uniformity of the coating thickness through the pretightening force of a spring; the press-fit mechanism adopts a multi-stage press-fit design, an ultrasonic detector scans a lamination interface in real time and triggers press-fit pressure compensation when bubbles or degumming is detected, and the bubble removal mechanism forms a negative pressure environment in a bubble removal chamber through a pneumatic push rod and an air pump to remove residual bubbles; the winding mechanism achieves constant-tension winding through a servo motor and a tension controller. According to the full-automatic film laminating machine, full-automatic production from unwinding, coating, pressing, defoaming to winding can be achieved, and the film laminating processing efficiency and the product quality are remarkably improved.

Description

Technical Field

[0001] The present invention relates to a sealing paper laminating processing device, which is particularly suitable for performing efficient and accurate laminating processing on sealing paper and has the functions of automatic bubble removal, online detection and tension control. Background Art

[0002] Sealing paper lamination is a key process in the packaging industry. By covering the surface of sealing paper with a protective film, its waterproofness, wear resistance, and appearance can be significantly improved. However, existing lamination processing equipment still faces many technical bottlenecks in practical application, specifically the following aspects: Inefficient bubble elimination: During the lamination and lamination process, bubbles are easily generated due to uneven adhesive coating or unstable lamination pressure. Existing technologies mostly rely on manual debubbling after manual visual inspection, which is inefficient and difficult to completely eliminate microbubbles, resulting in local debonding or appearance defects in the product.

[0003] Lack of online detection and feedback mechanism: Existing equipment lacks real-time quality monitoring means. Defects can only be discovered through random inspections after winding, and timely intervention is impossible during the processing. In particular, traditional equipment has difficulty in identifying and compensating for hidden defects such as bubbles and debonding at the pressing interface, resulting in a high defective rate.

[0004] Low degree of automation: Existing equipment mechanisms such as unwinding, coating, and lamination are mostly independently controlled, requiring frequent manual parameter adjustments, making it difficult to achieve continuous and efficient production. In addition, the problem of winding tension decreasing as the roll diameter increases is common, resulting in inconsistent roll tightness and affecting subsequent processing.

[0005] Therefore, it is urgent to develop a sealing paper laminating processing device that integrates high-precision tension control, real-time quality detection, efficient bubble removal and full-process automation to solve the core problems of the existing technology, such as unstable laminating quality, low production efficiency and high defective rate. Summary of the Invention

[0006] The purpose of the present invention is to provide a sealing paper laminating processing device to solve the problems of existing devices such as difficulty in eliminating bubbles, insufficient online detection and low degree of automation during the sealing paper production process, and to achieve efficient and accurate laminating processing.

[0007] The invention provides a sealing paper laminating processing device, which comprises a frame mechanism, an unwinding mechanism, a tensioning mechanism, a coating mechanism, a guiding mechanism, a pressing mechanism, a bubble removal mechanism and a winding mechanism.

[0008] The rack mechanism includes a base and a housing. The base provides support for the entire device, and the housing is used to protect the internal mechanism and reduce external interference.

[0009] The unwinding mechanism includes two sets of first brackets, which are fixedly installed at both ends of one side of the top of the base. The film unwinding roller and the sealing paper unwinding roller are detachably installed on the upper and lower sides of the first bracket. The detachable design of both facilitates material replacement. The film unwinding roller and the sealing paper unwinding roller are driven by a servo motor to achieve synchronous unwinding. The unwinding speed is adjusted by the PLC control system to ensure that the conveying speed of the film and the sealing paper is consistent.

[0010] The tensioning mechanism, located in front of the unwinding mechanism, consists of two sets of pillars. A first tensioning roller and a second tensioning roller are mounted on the upper and lower sides of each pillar. The first tensioning roller controls the tension of the film, while the second tensioning roller controls the tension of the sealing paper. Slots are located on the upper and lower sides of the pillars, housing electric telescopic rods. The top of the rods is connected to a slider, which flexibly connects to both ends of the first and second tensioning rollers.

[0011] Furthermore, the electric telescopic rod monitors the substrate tension in real time through a pressure sensor. When the tension deviates from the preset value, the electric telescopic rod drives the slider to move vertically along the slide groove, dynamically adjusting the height difference between the first tensioning roller and the second tensioning roller to ensure that the substrate enters the subsequent process with constant tension.

[0012] The coating mechanism, located in front of the tensioning mechanism, consists of two sets of supports, each with a fixed adhesive groove inside, which houses a coating roller. The coating roller is driven by a motor with an adjustable speed to ensure that the adhesive is evenly coated on the film surface.

[0013] Furthermore, a heating seat is installed under the glue tank, and an electric heater is provided inside the heating seat to heat the glue to 160±5°C to ensure the fluidity and adhesion of the glue.

[0014] Furthermore, a groove is formed on the top of the support, and a spring is fixedly installed at the bottom of the inner side of the groove. The top of the spring is connected to a movable frame, which is movably connected to both ends of the pressure roller. The pressure roller ensures stable contact between the film and the coating roller through the preload force of the spring, ensuring uniform coating thickness.

[0015] The guide mechanism consists of two sets of roller frames, with guide rollers installed on the inner upper side of the roller frames. The guide rollers are driven by motors, and their speed is synchronized with the coating rollers to ensure that the glue-coated film and the sealing paper are accurately aligned to form a laminate to be pressed.

[0016] The laminating mechanism comprises two groups of support plates, and a first laminating roller pair group and a second laminating roller pair group are respectively provided at both ends of the inner sides of the support plates.

[0017] Furthermore, the first lamination roller pair group and the second lamination roller pair group are both composed of two upper and lower lamination roller pairs, and the spacing between the two lamination roller pairs is adjustable. The first lamination roller pair group adopts an adjustable gap design to adapt to materials of different thicknesses; the second lamination roller pair group applies constant pressure through a hydraulic device, and an ultrasonic detector is fixedly installed on the top of the front side of the support plate. The ultrasonic detector is aimed at the label paper coated below. During the lamination process, the ultrasonic detector scans the laminated interface in real time. If bubbles or unbonded areas are detected, the feedback signal is sent to the control system to trigger automatic compensation of the lamination pressure to prevent bubbles from appearing in subsequent lamination.

[0018] The debubble removal mechanism includes a debubble removal box, which has a debubble removal chamber extending therethrough. Sealing baffles are provided at both ends of the debubble removal chamber, with a first sealing gasket fixedly mounted on the top of the sealing baffles and a second sealing gasket fixedly mounted on the bottom. Several sets of pneumatic push rods are fixedly mounted on both sides of the top of the debubble removal box, with the retractable ends of the pneumatic push rods fixedly connected to the sealing baffles. An air pump is fixedly mounted in the center of the top of the debubble removal box, with one end of the air pump inlet pipe communicating with the interior of the debubble removal chamber.

[0019] Embedded grooves are provided on both sides of the interior of the debubble chamber and at both ends of the two sets of sealing baffles. Sealing strips are fixedly installed on the inner wall of the debubble chamber and on both sides of the embedded grooves. When the sealing paper with bubbles after lamination enters the debubble chamber, the pneumatic push rod drives the sealing baffle to press down, so that the first sealing gasket and the second sealing gasket are respectively attached to the upper and lower surfaces of the debubble chamber to form an enclosed space. After the vacuum pump is started, the air pressure in the debubble chamber drops to below -0.08MPa and lasts for 10-15 seconds to eliminate residual bubbles.

[0020] Furthermore, in order to improve the sealing reliability, the embedded groove of the defoaming chamber is designed as a stepped structure: an inverted L-shaped protrusion is set at the bottom of the sealing baffle, forming a double sealing interface with the stepped surface of the embedded groove. When the pneumatic push rod is pressed down, the first sealing gasket and the sealing strip are radially compressed, and at the same time, the inverted L-shaped protrusion and the stepped surface are axially compressed to achieve a graded improvement in air tightness. Experiments have shown that this structure can reduce the leakage rate to <0.5Pa / s.

[0021] The winding mechanism consists of two sets of secondary brackets, each with a winding roller mounted on its inner upper portion. This roller is driven by a servo motor, and the winding tension is linked to a tension controller via a magnetic powder clutch. As the winding diameter increases, the controller automatically reduces torque according to the D / B winding curve, maintaining a constant surface tension of 15-25 N / m.

[0022] Furthermore, the winding roller adopts a center winding method and can be freely disassembled, so it is easy to replace after winding to the set number of rolls.

[0023] The working method of the sealing paper laminating processing device includes the following processes: unwinding, coating, laminating, de-bubbling, and winding. After the sealing paper laminating processing device is started, the film and sealing paper are synchronously output from the film unwinding roller and the sealing paper unwinding roller respectively. The unwinding speed is driven by a servo motor and accurately adjusted by the PLC control system to ensure that the conveying speeds of the two are consistent. After the film and sealing paper enter the tensioning mechanism, the first tensioning roller and the second tensioning roller are dynamically adjusted by the electric telescopic rod to monitor and adjust the substrate tension in real time. The pressure sensor built into the electric telescopic rod collects tension data in real time. When the tension is detected to deviate from the preset value, the electric telescopic rod drives the slider to move vertically along the slide slot, thereby adjusting the height difference between the first tensioning roller and the second tensioning roller to ensure that the film and sealing paper enter the coating mechanism with constant tension.

[0024] In the coating mechanism, when the film passes through the coating roller, the hot melt adhesive in the glue tank is heated to 160±5℃ by the heating seat to ensure that the glue has good fluidity and adhesion. The coating roller evenly coats the glue on the surface of the film at a speed of 20-30rpm. The pressure roller adjusts the preload force within the range of 50-200N through the spring to ensure that the film and the coating roller maintain stable contact. The CV value of the coating thickness uniformity is <3%; after coating is completed, the film and the sealing paper are precisely aligned under the guidance of the guide roller of the guide mechanism to form a laminated structure to be pressed.

[0025] After the film and sealing paper laminate enters the lamination mechanism, the first and second lamination roller pairs perform a two-stage lamination. After lamination, an ultrasonic detector scans the laminate interface at a 10kHz frequency in real time, generating an acoustic impedance spectrum. If a sudden impedance change, indicating air bubbles or debonding, is detected, the system automatically marks the defect location and triggers the lamination pressure compensation mechanism.

[0026] For short-term defects, the system automatically increases the current lamination roller pressure by 10%-15% for compensation, and the label paper with bubbles can automatically stop for compensation and debubbling operation after entering the subsequent debubbling mechanism; for continuous defects, the system triggers a shutdown alarm to prompt the operator to check the coating uniformity.

[0027] After the composite film with bubbles is pressed and enters the debubble mechanism 7, the pneumatic push rod drives the sealing baffle to press down, so that the first sealing gasket and the second sealing gasket respectively fit the upper and lower surfaces of the debubble chamber to form a closed space. Then, after the vacuum pump is started, the air pressure in the debubble chamber quickly drops to -0.06MPa within 5 seconds. At this time, the external pressure increases and the pressure inside the bubble is relatively low. According to Henry's law, the solubility of gas in liquid increases with increasing pressure, so the gas in the bubble will gradually dissolve into the liquid. Therefore, as the external pressure increases, the bubble volume shrinks, the surface area decreases, and the surface tension increases, further promoting the dissolution of the gas. As the gas continues to dissolve, the bubble eventually disappears, and the gas in the liquid reaches a new equilibrium state.

[0028] When the pneumatic push rod is pressed down, the first sealing gasket and the sealing strip are radially compressed, while the inverted L-shaped protrusion and the stepped surface are axially compressed, achieving a graded improvement in air tightness and reducing the leakage rate to <0.5Pa / s.

[0029] The composite film after debubbling enters the winding mechanism, and the winding roller is driven by a servo motor to rewind until the winding is completed.

[0030] The winding tension is linked to the tension controller through a magnetic powder clutch. When the winding diameter increases, the controller automatically reduces the torque according to the D / B winding curve to keep the surface tension of the coil constant within the range of 15-25N / m.

[0031] Throughout the entire process, each mechanism achieves automated linkage through the PLC control system to ensure the stability of production efficiency and product quality.

[0032] The beneficial effects of the present invention are: The present invention realizes a fully automated production process from unwinding, coating, pressing, degassing to winding through the coordinated work of various mechanisms. The coating roller in the coating mechanism can evenly apply the hot melt adhesive heated to 160±5°C to the surface of the film. The pressing roller ensures stable contact between the film and the coating roller through the preload force of the spring. This design not only improves the uniformity of coating, but also ensures the fluidity and adhesion of the adhesive, avoiding the problems of missing coating or adhesive accumulation during the coating process. Secondly, the first and second lamination roller pairs in the lamination mechanism perform multi-stage lamination of the laminate. After lamination, an ultrasonic detector scans the laminate interface in real time at a frequency of 10kHz to generate an acoustic impedance spectrum. When bubbles or debonding are detected, the system automatically marks the defect location and triggers the lamination pressure compensation mechanism. This design significantly improves lamination quality and reduces the defective rate. In addition, the debubble mechanism drives the sealing baffle downward through a pneumatic push rod, so that the first sealing gasket and the second sealing gasket respectively fit the upper and lower surfaces of the debubble chamber to form a closed space. After the vacuum pump is started, the air pressure in the debubble chamber quickly drops to -0.06MPa and lasts for 10-15 seconds to eliminate residual bubbles, thereby quickly remedying label paper with bubbles in the lamination and effectively reducing the scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the sealing paper laminating processing device; Figure 2 This is a schematic diagram of the internal structure of the sealing paper laminating device without the shell; Figure 3 This is a schematic diagram of the tensioning mechanism structure of the sealing paper laminating device; Figure 4 This is a schematic diagram of the coating mechanism structure of the sealing paper laminating device; Figure 5 This is a schematic diagram of the structure of the defoaming mechanism of the sealing paper laminating processing device; Figure 6 This is a schematic cross-sectional view of the defoaming mechanism of the sealing paper laminating device; Figure 7 This is a schematic diagram of the internal structure of the defoaming mechanism of the sealing paper laminating processing device.

[0034] Figure: 1. Frame mechanism; 11. Base; 12. Housing; 2. Unwinding mechanism; 21. First bracket; 22. Film unwinding roller; 23. Sealing paper unwinding roller; 3. Tensioning mechanism; 31. Support; 32. First tensioning roller; 33. Second tensioning roller; 34. Slide; 35. Electric telescopic rod; 36. Slider; 4. Coating mechanism; 41. Support; 42. Glue groove; 43. Coating roller; 44. Pressing roller; 45. Groove; 46. Spring; 47. Movable frame; 48. Heating seat; 5. Guide mechanism Structure; 51. Roller frame; 52. Guide roller; 6. Laminating mechanism; 61. Support plate; 62. First laminating roller pair; 63. Second laminating roller pair; 64. Ultrasonic detector; 7. Defoaming mechanism; 71. Defoaming box; 72. Air pump; 73. Pressure sensor; 74. Pneumatic push rod; 75. Defoaming chamber; 76. Sealing baffle; 77. First sealing gasket; 78. Second sealing gasket; 79. Embedded groove; 710. Sealing strip; 8. Winding mechanism; 81. Second bracket; 82. Winding roller. DETAILED DESCRIPTION Example 1

[0035] like Figure 1-2 As shown, the sealing paper laminating device includes a frame mechanism 1, an unwinding mechanism 2, a tensioning mechanism 3, a coating mechanism 4, a guiding mechanism 5, a pressing mechanism 6, a bubble removal mechanism 7, and a winding mechanism 8. Each mechanism is connected in series along the processing path to form a continuous production line.

[0036] The frame mechanism 1 includes a base 11 and a housing 12 , wherein the base 11 provides support for the entire device.

[0037] The unwinding mechanism 2 includes two sets of first brackets 21, fixedly mounted at either end of the top side of the base 11. A film unwinding roller 22 and a sealing paper unwinding roller 23 are detachably mounted on the upper and lower sides of the first brackets 21. This detachable design facilitates the installation, fixing, and replacement of the raw materials used in the production of sealing paper lamination.

[0038] The film unwinding roller 22 and the sealing paper unwinding roller 23 are driven by servo motors to achieve synchronous unwinding. The unwinding speed is adjusted by a PLC control system to ensure that the conveying speed of the film and the sealing paper is consistent.

[0039] like Figure 2 and Figure 3 As shown, the tensioning mechanism 3 is located in front of the unwinding mechanism 2 and includes two groups of pillars 31. A first tensioning roller 32 and a second tensioning roller 33 are installed on the upper and lower sides of the pillars 31 respectively.

[0040] The first tensioning roller 32 is used to adjust the tension of the film, while the second tensioning roller 33 is used to adjust the tension of the sealing paper. Slots 34 are located on the upper and lower sides of the support 31. An electric telescopic rod 35 is installed within these slots. A slider 36 is connected to the top of the rod 35, which is movably connected to both ends of the first and second tensioning rollers 32, 33. The rod 35 monitors the tension of the substrate in real time via a pressure sensor. When the tension deviates from a preset value, the rod 35 drives the slider 36 to move vertically along the slot 34, dynamically adjusting the height difference between the first and second tensioning rollers 32, 33, ensuring that the substrate maintains a constant tension before entering subsequent processes.

[0041] like Figure 2 and Figure 5 As shown, the coating mechanism 4 is located in front of the tensioning mechanism 3, and includes two sets of supports 41. A glue groove 42 is fixedly installed on the inner side of the support 41, and a coating roller 43 is arranged in the glue groove 42. The coating roller 43 is driven by a motor with an adjustable speed to ensure that the glue is evenly coated on the surface of the film. A heating seat 48 is installed below the glue groove 42. An electric heater is arranged inside the heating seat 48 to heat the glue to 160±5°C to ensure the fluidity and adhesion of the glue. A groove 45 is provided at the top of the support 41, and a spring 46 is fixedly installed at the bottom inside the groove 45. The top of the spring 46 is connected to a movable frame 47, and the movable frame 47 is movably connected to both ends of the pressure roller 44. The pressure roller 44 adjusts the preload force within the range of 50-200N through the spring 46 to ensure that the film maintains stable contact with the coating roller 43, so that the coating thickness uniformity CV value is <3%.

[0042] like Figure 2As shown, the guide mechanism 5 is located in front of the coating mechanism 4 and includes two sets of roller frames 51. A guide roller 52 is installed on the upper inner side of the roller frame 51. The coating roller 43 cooperates with the pressure roller 44 to complete the gluing work on the bottom of the film, and the guide roller 52 is driven by a motor, and its rotation speed is synchronized with the coating roller 43 to ensure that the glue-coated film and the sealing paper are accurately aligned to form a laminate to be laminated. The laminating mechanism 6 is located in front of the guide mechanism 5 and includes two sets of support plates 61. The first laminating roller pair group 62 and the second laminating roller pair group 63 are respectively provided at the two ends of the inner side of the support plate 61. The first laminating roller pair group 62 and the second laminating roller pair group 63 are both composed of two upper and lower laminating roller pairs, and the spacing between the two laminating roller pairs is adjustable. The first laminating roller pair group 62 uses a screw to fine-tune the gap between the upper and lower rollers to adapt to materials of different thicknesses; the second laminating roller pair group 63 applies constant pressure through a hydraulic device. An ultrasonic detector 64 is fixedly mounted on the top front of the support plate 61, aimed at the laminated label paper below. The first and second laminating roller pairs 62 and 63 enable dual lamination. After laminating the film and sealing paper, the ultrasonic detector 64 scans the lamination interface in real time. If it detects bubbles or unbonded areas, it sends a signal to the control system, triggering automatic compensation of the lamination pressure to prevent bubbles from forming during subsequent lamination.

[0043] like Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 and Figure 7 As shown, the debubble mechanism 7 is located in front of the pressing mechanism 6, and includes a debubble box 71. A debubble chamber 75 is provided in the debubble box 71. Sealing baffles 76 are provided at both ends of the debubble chamber 75. A first sealing gasket 77 is fixedly installed on the top of the sealing baffle 76, and a second sealing gasket 78 is fixedly installed on the bottom. Six groups of pneumatic push rods 74 are fixedly installed on both sides of the top of the debubble box 71, and the retractable ends at the bottom of the pneumatic push rods 74 are fixedly connected to the sealing baffles 76. An air pump 72 is fixedly installed in the center of the top of the debubble box 71, and one end of the air inlet pipe of the air pump 72 is interconnected with the inside of the debubble chamber 75. Embedded grooves 79 are provided on both sides of the debubble chamber 75 and at both ends of the two groups of sealing baffles 76. Sealing strips 710 are fixedly installed on the inner wall of the debubble chamber 75 and on both sides of the embedded grooves 79.

[0044] When bubbles are detected in the sealing paper after lamination, the machine automatically stops after the sealing paper enters the debubble chamber 75, and the lamination is stopped at this time. Then the pneumatic push rod 74 drives the sealing baffle 76 to press down, so that the first sealing gasket 77 and the second sealing gasket 78 are respectively attached to the upper and lower surfaces of the debubble chamber 75 to form a closed space. After the random air pump 72 is started, the air pressure in the debubble chamber 75 drops to below -0.08MPa and lasts for 10-15 seconds to eliminate residual bubbles.

[0045] To improve sealing reliability, the embedded groove 79 of the defoaming chamber 75 can be designed with a stepped structure: an inverted L-shaped protrusion is provided at the bottom of the sealing baffle 76, forming a double sealing interface with the stepped surface of the embedded groove 79. When the pneumatic push rod 74 is pressed downward, the first sealing gasket 77 and the sealing strip 710 are radially compressed, while the inverted L-shaped protrusion and the stepped surface are axially compressed, achieving a step-by-step improvement in airtightness. Experiments have shown that this structure can reduce the leakage rate to <0.5 Pa / s.

[0046] like Figure 2 As shown, the winding mechanism 8 is located at either end of the top of the base 11 and includes two sets of second brackets 81. A winding roller 82 is mounted above the inner side of the second brackets 81. The winding roller 82 is driven by a servo motor, and the winding tension is linked to the tension controller via a magnetic powder clutch. As the winding diameter increases, the controller automatically reduces the torque according to the D / B winding curve, maintaining a constant surface tension of 15-25 N / m. The winding mechanism 8 completes the winding of the successfully laminated label paper. The winding roller 82 is freely removable, allowing for easy replacement after the set number of rolls has been wound.

[0047] The working method of the sealing paper laminating device includes the following processes: unwinding, coating, laminating, de-bubbling, and winding. After the sealing paper laminating device is started, the film and sealing paper are synchronously output from the film unwinding roller 22 and the sealing paper unwinding roller 23, respectively. The unwinding speed is driven by a servo motor and precisely adjusted by a PLC control system to ensure that the conveying speeds of the two are consistent. After the film and sealing paper enter the tensioning mechanism 3, the first tensioning roller 32 and the second tensioning roller 33 are dynamically adjusted by the electric telescopic rod 35 to monitor and adjust the substrate tension in real time. The pressure sensor built into the electric telescopic rod 35 collects tension data in real time. When the tension deviates from the preset value, the electric telescopic rod 35 drives the slider 36 to move vertically along the slide 34, thereby adjusting the height difference between the first tensioning roller 32 and the second tensioning roller 33, ensuring that the film and sealing paper enter the coating mechanism 4 with constant tension.

[0048] In the coating mechanism 4, when the film passes through the coating roller 43, the hot melt adhesive in the adhesive groove 42 is heated to 160±5°C by the heating seat 48 to ensure that the adhesive has good fluidity and adhesion. The coating roller 43 evenly coats the adhesive on the surface of the film at a rotation speed of 20-30rpm. The pressure roller 44 adjusts the preload force within the range of 50-200N through the spring 46 to ensure that the film maintains stable contact with the coating roller 43, and the CV value of the coating thickness uniformity is <3%; after coating is completed, the film and the sealing paper are precisely aligned under the guidance of the guide roller 52 of the guide mechanism 5 to form a laminated structure to be pressed.

[0049] After the film and sealing paper laminate enters the laminating mechanism 6, a first laminating roller pair 62 and a second laminating roller pair 63 perform a two-stage lamination. After lamination, an ultrasonic detector 64 scans the laminate interface at a 10kHz frequency in real time, generating an acoustic impedance spectrum. If a sudden impedance change, indicating air bubbles or debonding, is detected, the system automatically marks the defect location and triggers the lamination pressure compensation mechanism.

[0050] For short-term defects, the system automatically increases the current lamination roller pressure by 10%-15% for compensation, and the label paper with bubbles can automatically stop for compensation and debubbling operation after entering the subsequent debubbling mechanism; for continuous defects, the system triggers a shutdown alarm to prompt the operator to check the coating uniformity.

[0051] After the composite film with bubbles is pressed and enters the debubble mechanism 7, the pneumatic push rod 74 drives the sealing baffle 76 to press down, so that the first sealing gasket 77 and the second sealing gasket 78 are respectively attached to the upper and lower surfaces of the debubble chamber 75 to form a closed space. Then, after the vacuum pump 72 is started, the air pressure in the debubble chamber 75 drops rapidly to -0.06MPa within 5 seconds. At this time, the external pressure increases, the pressure inside the bubble is relatively low, and the solubility of the gas in the liquid increases with the pressure, and the bubble eventually disappears. When the pneumatic push rod 74 is pressed down, the first sealing gasket 77 and the sealing strip 710 are radially compressed, and the inverted L-shaped protrusion and the stepped surface are axially compressed, achieving a graded improvement in airtightness and reducing the leakage rate to <0.5Pa / s.

[0052] Finally, the composite film after debubbling enters the winding mechanism 8, the surface tension of the coil is constant in the range of 15-25N / m, and the winding roller 82 is driven by a servo motor to rewind until the winding is completed. Example 2

[0053] The tensioning mechanism 3 can adopt a pneumatic compensation solution: the electric telescopic rod 35 is replaced with a pneumatic cylinder with a proportional valve, and a displacement sensor is added in the slide 34. When the substrate tension fluctuates, the pneumatic cylinder adjusts its stroke based on the feedback from the displacement sensor, achieving millisecond-level dynamic response. This is particularly suitable for high-speed production with speeds >30m / min.

Claims

1. A sealing paper laminating processing device, comprising a frame mechanism (1), an unwinding mechanism (2), a tensioning mechanism (3), a coating mechanism (4), a guiding mechanism (5), a pressing mechanism (6), a bubble removal mechanism (7) and a winding mechanism (8); characterized in that: The frame mechanism (1) includes a base (11) and a shell (12) arranged on the top of the base (11); the unwinding mechanism (2) includes a first bracket (21) fixedly mounted on both ends of one side of the top of the base (11); and a film unwinding roller (22) and a sealing paper unwinding roller (23) are detachably mounted on the upper and lower sides of the two sets of the first brackets (21); The tensioning mechanism (3) comprises pillars (31) fixedly mounted on both sides of the top of the base (11) in front of the unwinding mechanism (2), and a first tensioning roller (32) for controlling the tension of the film and a second tensioning roller (33) for controlling the tightness of the sealing paper are movably mounted on the upper and lower sides of the two groups of pillars (31); The coating mechanism (4) includes supports (41) fixedly mounted on both sides of the top of the base (11) in front of the tensioning mechanism (3), two groups of supports (41) are fixedly mounted with glue grooves (42) on the inner sides thereof, and coating rollers (43) are arranged in the glue grooves (42), and pressure rollers (44) are arranged on the tops of the two groups of supports (41); The guide mechanism (5) is arranged in front of the coating mechanism (4), and the pressing mechanism (6) includes support plates (61) arranged on both sides of the top of the base (11) in front of the guide mechanism (5), and the two sets of support plates (61) are respectively provided with a first pressing roller pair group (62) and a second pressing roller pair group (63) at both ends of the inner side, and an ultrasonic detector (64) is fixedly installed on the top of the front side of the support plate (61); The defoaming mechanism (7) includes a defoaming box (71) fixedly mounted on the top of the base (11) in front of the pressing mechanism (6), a defoaming chamber (75) is provided in the defoaming box (71), and sealing baffles (76) are provided at both ends of the interior of the defoaming chamber (75). A plurality of pneumatic push rods (74) are fixedly mounted on both sides of the top of the defoaming box (71), and the retractable bottom ends of the pneumatic push rods (74) are fixedly connected to the sealing baffles (76). An air pump (72) is fixedly mounted in the center of the top of the defoaming box (71), and one end of the air inlet pipe of the air pump (72) is communicated with the interior of the defoaming chamber (75). The winding mechanism (8) comprises second brackets (81) fixedly mounted on both ends of the other side of the top of the base (11), and winding rollers (82) are detachably mounted on the upper inner sides of the two sets of the second brackets (81).

2. The sealing paper laminating device according to claim 1, characterized in that: A chute (34) is provided on both the upper and lower sides of the support (31), an electric telescopic rod (35) with a pressure sensor is fixedly installed on the bottom of the inner side of the chute (34), a slider (36) is fixedly installed on the top of the electric telescopic rod (35) and located in the chute (34), and both ends of the first tensioning roller (32) and the second tensioning roller (33) are movably connected to the slider (36); A groove (45) is provided on the top of the support (41), a spring (46) is fixedly installed on the bottom of the inner side of the groove (45), a movable frame (47) is fixedly installed on the top of the spring (46) and located inside the groove (45), and both ends of the pressure roller (44) are movably connected to the movable frame (47); A heating seat (48) is installed inside the support (41) and below the glue groove (42), and an electric heater is provided inside the heating seat (48).

3. The sealing paper laminating device according to claim 1, characterized in that: A first sealing gasket (77) is fixedly mounted on the top of the sealing baffle (76), and a second sealing gasket (78) is fixedly mounted on the bottom of the sealing baffle (76); embedding grooves (79) are provided on both sides of the interior of the defoaming chamber (75) and at both ends of the two sets of sealing baffles (76); sealing strips (710) are fixedly mounted on the inner wall of the defoaming chamber (75) and at both sides of the embedding grooves (79).

4. The sealing paper laminating device according to claim 1, characterized in that: The first laminating roller pair group (62) and the second laminating roller pair group (63) are both composed of two upper and lower laminating roller pairs, and the distance between the two laminating roller pairs is adjustable.

5. The sealing paper laminating device according to claim 1, characterized in that: The guide mechanism (5) comprises roller frames (51) fixedly mounted on both sides of the top of the base (11) in front of the coating mechanism (4), and guide rollers (52) are rotatably mounted on the upper inner sides of the two groups of roller frames (51).

6. The sealing paper laminating device according to claim 1, characterized in that: A pressure sensor (73) is fixedly installed on the top of the debubble box (71) and located on one side of the air extraction pump (72), and a bottom probe of the pressure sensor (73) is arranged inside the debubble chamber (75).

7. A method for operating a sealing paper laminating device, comprising: Unwinding, coating, pressing, defoaming and winding process; its characteristics are: (A) The film and sealing paper are synchronously fed from the film unwinding roller 22 and the sealing paper unwinding roller 23, respectively. The film and sealing paper enter the tensioning mechanism 3 for tensioning before entering the coating mechanism 4. When the film passes through the coating roller 43, the hot melt adhesive in the adhesive tank 42 is at 160±5°C. The coating roller 43 evenly coats the adhesive on the film surface at a speed of 20-30rpm. The coating roller 44 keeps the preload force of the spring 46 within the range of 50-200N. The CV value of the film coating thickness uniformity is <3%. (B) After coating is completed, the film and sealing paper are guided by the guide rollers 52 of the guide mechanism 5 to form a laminated structure to be laminated. The laminated film and sealing paper enter the laminating mechanism 6, where the laminated structure is laminated in two stages by the first laminating roller pair 62 and the second laminating roller pair 63. (C) After lamination, the ultrasonic detector 64 scans the laminate interface to generate an acoustic impedance spectrum; (D) After the composite film with bubbles is pressed and enters the debubble mechanism 7, the pneumatic push rod 74 drives the sealing baffle 76 to press down, so that the first sealing gasket 77 and the second sealing gasket 78 are respectively attached to the upper and lower surfaces of the debubble chamber 75, forming a closed space. Then, after the air pump 72 is started, the air pressure in the debubble chamber 75 quickly drops to -0.06 MPa within 5 seconds; (E) The composite film after debubbling enters the winding mechanism 8, and the winding roller is driven by a servo motor to rewind until the rewinding is completed.

8. The processing method of the sealing paper laminating device according to claim 7, characterized in that: Step (B) includes step (B1), which is: the first tensioning roller 32 and the second tensioning roller 33 are dynamically adjusted by the electric telescopic rod 35 to monitor and adjust the substrate tension in real time, and the pressure sensor built into the electric telescopic rod 35 collects tension data in real time; when it is detected that the tension deviates from the preset value, the electric telescopic rod 35 drives the slider 36 to move vertically along the slide groove 34, thereby adjusting the height difference between the first tensioning roller 32 and the second tensioning roller 33, ensuring that the film and sealing paper enter the coating mechanism 4 with constant tension.

9. The processing method of the sealing paper laminating device according to claim 7, characterized in that: Step (C) includes step (C1), wherein step (C1) is: when an impedance mutation indicating air bubbles or debonding is detected, the system automatically marks the defect location and triggers a pressing pressure compensation mechanism; For short-term defects, the current lamination roller pressure is increased by 10%-15% for compensation. Label paper with bubbles can automatically stop for compensation and debubbling operation after entering the subsequent debubbling mechanism; for continuous defects, the system triggers a shutdown alarm to prompt the operator to check the coating uniformity.

10. The processing method of the sealing paper laminating device according to claim 9, characterized in that : Step (C) includes step (C2). In step (C2), the pneumatic push rod 74 is pressed downward, the first sealing gasket 77 and the sealing strip 710 are radially compressed, and at the same time, the inverted L-shaped protrusion and the stepped surface are axially compressed, thereby achieving a graded improvement in air tightness and reducing the leakage rate to <0.5 Pa / s.

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