Roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line

Abstract

The invention relates to the technical field of pressure-sensitive adhesive film production, and discloses a roll-to-roll double-sided UV curing production line for PET pressure-sensitive adhesive film. The production line comprises an assembly frame, on which are arranged in sequence from top to bottom in the vertical direction: a rewinding roller for continuously releasing a PET pressure-sensitive adhesive substrate; a straightening component comprising two groups of fixed rollers and a movable roller arranged along the vertical direction of the assembly frame, the two groups of movable rollers being synchronously driven in the horizontal direction for maintaining vertical calibration of the PET pressure-sensitive adhesive substrate during feeding. The solution adopts a reciprocatingly driven double-sided UV curing component, combined with a guide plate switching mechanism to enable a scraper to automatically complete separation and pressing actions during up and down movements, without the need for frequent positioning and leveling during high-speed movement, without the need for high-precision equipment, and with lower requirements for a tensioning mechanism, a scraper mechanism, and a UV curing mechanism. Spiral blades are used to recover excess glue to ensure that the thickness, uniformity, and consistency of curing conditions of the adhesive layers on both sides of the PET pressure-sensitive adhesive film are precisely controlled when both sides are simultaneously coated.

Description

Technical Field

[0001] The invention relates to the technical field of pressure-sensitive adhesive film production, in particular to a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line. Background Art

[0002] PET (polyethylene terephthalate) pressure-sensitive adhesive film is a functional composite material with a PET film substrate and a pressure-sensitive adhesive coated on the surface. The high mechanical strength, temperature resistance, transparency, and dimensional stability of the PET substrate, combined with the viscoelastic properties of the pressure-sensitive adhesive, enable rapid bonding and long-lasting adhesion even with minimal pressure.

[0003] Currently, during the production of double-sided PET pressure-sensitive adhesive films, after coating on one side, the substrate needs to be flipped over for coating on the reverse side. During the flipping process, the uncured adhesive layer may contact the guide roller or equipment, causing contamination.

[0004] If the adhesive layer is coated on both sides simultaneously, however, the traditional horizontal conveying production line of pressure-sensitive adhesive film will inevitably have production differences between the upper and lower sides due to the weight increase of the film after coating and the sinking due to its own gravity. For example, uncured glue drips from the bottom of the substrate or glue accumulates on the top of the substrate. The substrate position needs to be adjusted and processed repeatedly. This places higher requirements on the tensioning mechanism, scraper mechanism and UV curing mechanism. It is difficult to accurately control the thickness, uniformity and consistency of the adhesive layer on both sides when coating the PET pressure-sensitive adhesive film on both sides simultaneously, and it is even more difficult to ensure production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line, aiming to solve the problem that traditional PET pressure-sensitive adhesive film production lines are difficult to meet the consistency problem when simultaneously coating and curing on both sides.

[0006] The present invention is achieved in this way: a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line includes an assembly rack, which is vertically provided with:

[0007] Unwinding roller, used to continuously release PET pressure-sensitive adhesive substrate;

[0008] The straightening assembly includes two sets of fixed rollers and a movable roller arranged in the vertical direction of the assembly frame. The two sets of movable rollers are synchronously driven in the horizontal direction to maintain the verticality calibration of the PET pressure-sensitive adhesive substrate during the feeding process;

[0009] Guide rollers are used for folding line guidance of the PET pressure-sensitive adhesive substrate material path;

[0010] Two sets of laminating rollers are symmetrically arranged along the upper and lower sides of the PET pressure-sensitive adhesive substrate, and are used to simultaneously heat-press the release film onto both sides of the PET pressure-sensitive adhesive substrate;

[0011] Winding roller, used to wind up the laminated pressure-sensitive adhesive finished film;

[0012] Double-sided processing unit, including:

[0013] The UV curing assembly includes a curing shell disposed on both sides of the PET pressure-sensitive adhesive substrate. The working surfaces of the two curing shells are integrated from top to bottom with: a plasma pretreatment assembly, a plurality of horizontally distributed coating nozzles, a scraper assembly, and a curing lamp frame;

[0014] A reciprocating assembly is used to drive the two groups of UV curing assemblies to synchronously perform bidirectional linear motion along the direction of travel of the PET pressure-sensitive adhesive substrate;

[0015] The guide assembly includes an outer guide plate and an inner guide plate distributed on both sides of the curing shell. The guide heads arranged on both sides of the curing shell alternately form sliding pairs with the outer guide plate and the inner guide plate during the reciprocating process, dynamically maintaining the set distance between the curing shell and the PET pressure-sensitive adhesive substrate during the reciprocating motion.

[0016] Preferably, the straightening assembly also includes a straightening telescopic machine horizontally installed at the rear of the assembly frame, the telescopic part of which is connected to a C-shaped slide, the two groups of movable rollers are respectively connected by rotating shafts at the ends of the slides, and the two fixed rollers are respectively connected to the assembly frame in the direction of travel of the movable rollers through rotating shafts.

[0017] Preferably, the guide assembly further comprises a fixing frame, and the upper and lower parts of both sides of the fixing frame are connected to adjustment rods via rotating shafts, and the four adjustment rods are synchronously driven by adjusting motor belts;

[0018] The outer ends of the adjusting rod are both sleeved with connecting blocks, and the upper and lower parts of the outer guide plates and inner guide plates distributed on both sides of the solidifying shell are fixed by the connecting blocks on one side of the fixing frame, and a cross frame is also provided between the outer guide plates on both sides of the solidifying shell.

[0019] Preferably, the two ends of the adjusting rod are respectively provided with a forward thread and a reverse thread, and the connection blocks at both ends are respectively provided with thread grooves engaged with the forward thread and the reverse thread;

[0020] The adjusting rod is used to adjust the distance between the two outer guide plates of the curing shell.

[0021] Preferably, the cross section of the outer guide plate located on one side of the solidified shell is C-shaped, and the lower end of the outer guide plate is longer than the upper end;

[0022] The lower end of the inner guide plate located on one side of the solidifying shell is connected to a blocking piece through a spring shaft. A limiting block is also provided on the inner guide plate, and the limiting block is used to limit the blocking piece from rotating toward the outer guide plate.

[0023] Preferably, the reciprocating assembly further comprises a reciprocating telescopic machine vertically mounted on the surface of the assembly frame, the telescopic portion of the reciprocating telescopic machine is connected to a fixed plate, and vertically arranged opening and closing brackets are mounted on both sides of the fixed plate;

[0024] The surface of the assembly frame is further provided with two vertically distributed guide rails, and the fixing plate is provided with a slider that slides on the guide rails.

[0025] Preferably, a guide rod is fixedly mounted on each of the two opening and closing brackets, and a spring is sleeved on the outer portion of the guide rod;

[0026] Guide blocks are respectively arranged on both sides of the top of the two solidifying shells. The guide rod passes through the guide blocks on one side of the two solidifying shells, and the two ends of the spring respectively contact the two guide blocks.

[0027] Preferably, a plurality of the coating nozzles are respectively provided with electromagnetic switch valves, the lower portion of the curing lamp rack is inclined, and a plurality of LED-UV lamps are evenly distributed on the surface of the curing lamp rack, and a lampshade is also clamped on the outer side of the inclined portion of the curing lamp rack;

[0028] The scraper assembly includes a scraper fixed to the bottom of the coating nozzle by bolts. The cross section of the scraper is semicircular and includes a vertically arranged flattening portion and an arc-shaped glue-returning portion.

[0029] Preferably, the scraper assembly further comprises a transmission shaft connected to the glue return portion by a bearing, and a spiral pushing blade is provided on the outside of the transmission shaft;

[0030] A ratchet is coaxially mounted on the guide head, which drives a driving wheel in one direction through the ratchet, and the axle of the driving wheel is connected to the transmission shaft through a belt transmission.

[0031] Preferably, positioning sensors are provided between both sides of the working surfaces of the two curing shells, wherein one curing shell is an infrared signal sending end and the other curing shell is an infrared signal receiving end.

[0032] The beneficial effects of the roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line disclosed in the present invention are:

[0033] 1. This solution integrates unwinding, straightening, plasma pretreatment, intelligent coating, dynamic scraping, UV curing and composite winding modules through a vertical layout, avoiding the problems caused by gravity during traditional coating and curing, and achieving efficient continuous production operations;

[0034] 2. This solution uses a reciprocating-driven double-sided UV curing assembly, combined with a guide plate switching mechanism to automatically complete the separation and pressing action of the scraper during the upward and downward movement. During the high-speed movement, there is no need for frequent positioning and leveling, and no need for high-precision equipment. The requirements for the tensioning mechanism, scraper mechanism, and UV curing mechanism are lower. The spiral blade is used to recover excess glue to meet the requirements of precise control of the adhesive layer thickness, uniformity, and consistency of curing conditions on both sides during the simultaneous coating of PET pressure-sensitive adhesive film.

[0035] 3. The synchronous adjustment system dynamically controls the coating thickness and curing distance through sensor feedback. Combined with the tilted LED-UV low-temperature curing technology, it improves the uniformity and adhesion of double-sided coating while avoiding thermal deformation of the substrate, solving the problems of high pollution and unstable quality in traditional processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0037] Figure 2 2. It is a rear view schematic diagram of a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0038] Figure 3 This is a partial schematic diagram of a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0039] Figure 4 This is a partial schematic diagram from another perspective of a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0040] Figure 5 Schematic diagram of a guide assembly for a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0041] Figure 6 The invention provides a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line. Figure 5 Schematic diagram of local structure;

[0042] Figure 7 Schematic diagram of a straightening assembly for a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0043] Figure 8 This is a partial schematic diagram of the UV curing assembly of a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0044] Figure 9 The invention provides a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line. Figure 8Schematic diagram of the local internal structure;

[0045] Figure 10 Schematic side view of the curing housing of a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line provided by an embodiment of the present invention;

[0046] Figure 11 The invention provides a roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line. Figure 10 Schematic diagram of the locally enlarged structure at point A in the middle.

[0047] Legend:

[0048] 1. Assembly frame; 2. Unwinding roller; 3. Rewinding roller; 4. PET pressure-sensitive adhesive substrate; 5. Straightening assembly; 6. Guide assembly; 7. Reciprocating assembly; 8. UV curing assembly;

[0049] 11. Guide roller; 12. Release film; 13. Composite roller;

[0050] 51. Straightening and telescopic machine; 52. Slide; 53. Fixed roller; 54. Moving roller;

[0051] 61. Fixing bracket; 62. Adjusting motor; 63. Adjusting rod; 64. Connecting block; 65. Outer guide plate; 66. Inner guide plate; 67. Blocking piece; 68. Limiting block;

[0052] 71. Reciprocating telescopic mechanism; 72. Guide rail; 73. Slider; 74. Fixed plate; 75. Opening and closing bracket; 76. Guide rod; 77. Spring;

[0053] 81. Curing shell; 82. Plasma pretreatment assembly; 83. Guide head; 84. Positioning sensor; 85. Solenoid switch valve; 86. Scraper assembly; 87. Curing lamp holder; 88. Guide block;

[0054] 831, ratchet; 832, drive wheel; 851, coating nozzle; 861, scraper; 862, transmission shaft; 863, spiral push blade; 871, LED-UV lamp; 872, lampshade;

[0055] 8611, scraping unit; 8612, glue return unit. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0057] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0058] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0059] This solution aims to solve the problem of inevitable production differences between the upper and lower sides of the traditional horizontal conveying production line for pressure-sensitive adhesive films due to the film's own gravity sinking after coating. This places higher demands on the tensioning mechanism, scraper mechanism and UV curing mechanism, making it difficult to meet the problem of precisely controlling the thickness, uniformity and consistency of the adhesive layer on both sides of the PET pressure-sensitive adhesive film when coating both sides simultaneously.

[0060] In this embodiment:

[0061] Reference Figure 1-3 As shown, a preferred embodiment of the present invention is provided.

[0062] The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line of this embodiment includes an assembly frame 1, which is provided with the following components in order from top to bottom in the vertical direction:

[0063] The unwinding roller 2 is used to continuously release the PET pressure-sensitive adhesive substrate 4 and provide real-time feedback of the tension at the unwinding end through a sensor;

[0064] The straightening assembly 5 includes two sets of fixed rollers 53 and a movable roller 54 arranged in a vertical direction along the assembly frame 1. The two sets of movable rollers 54 are synchronously driven in the horizontal direction to maintain the verticality of the PET pressure-sensitive adhesive substrate 4 during the feeding process. Through the synchronous horizontal movement of the two sets of movable rollers 54, a force is applied to one side of the PET pressure-sensitive adhesive substrate 4, so that the feeding path of the PET pressure-sensitive adhesive substrate 4 remains vertical and centered relative to the UV curing assembly 8.

[0065] The guide roller 11 is used for guiding the folding line of the material path of the PET pressure-sensitive adhesive substrate 4;

[0066] Two sets of laminating rollers 13 are symmetrically arranged along the upper and lower sides of the PET pressure-sensitive adhesive substrate 4, and are used to simultaneously heat-press the release film 12 onto both sides of the PET pressure-sensitive adhesive substrate 4;

[0067] Winding roller 3, used for winding the composite pressure-sensitive adhesive finished film;

[0068] Double-sided processing unit, including:

[0069] The UV curing assembly 8 includes a curing housing 81 disposed on both sides of the PET pressure-sensitive adhesive substrate 4. The working surfaces of the two curing housings 81 are integrated with: a plasma pre-treatment assembly 82, a plurality of horizontally distributed coating nozzles 851, a scraper assembly 86, and a curing lamp frame 87 from top to bottom;

[0070] The plasma pretreatment assembly 82 generates active particles through atmospheric pressure glow discharge to bombard the surface of the PET pressure-sensitive adhesive substrate 4, thereby decontaminating the surface and breaking the chemical inertness of the PET surface, thereby enhancing the chemical bond with the glue. Furthermore, the plasma pretreatment improves the wettability of the PET surface, making the glue easier to spread, reducing coating defects and the risk of debonding. The PET plasma pretreatment operation is well known in the art and will not be explained here.

[0071] Several horizontally distributed coating nozzles 851 are used to apply coating to the surface of the PET pressure-sensitive adhesive substrate 4, and each of the coating nozzles 851 is provided with an electromagnetic switch valve 85, so that each coating nozzle 851 can be controlled to operate independently, and is used to perform re-coating operations on unevenly coated areas of the PET pressure-sensitive adhesive substrate 4;

[0072] The scraper assembly 86 includes a scraper 861 bolted to the bottom of the coating nozzle 851. The scraper 861 has a semicircular cross-section and includes a vertically arranged flattening portion 8611 and an arc-shaped adhesive return portion 8612. The flattening portion 8611 is used to flatten the coated glue on the surface of the PET pressure-sensitive adhesive substrate 4. The excess glue will flow into the adhesive return portion 8612.

[0073] Reciprocating assembly 7, in Figure 4 and Figure 8In the figure, it is used to drive the two groups of UV curing components 8 to perform bidirectional linear motion synchronously along the traveling direction of the PET pressure-sensitive adhesive substrate 4; the reciprocating component 7 also includes a reciprocating telescopic machine 71 vertically mounted on the surface of the assembly frame 1, and the telescopic part of the reciprocating telescopic machine 71 is connected to a fixed plate 74, and vertically arranged opening and closing brackets 75 are installed on both sides of the fixed plate 74; the surface of the assembly frame 1 is also provided with two vertically distributed guide rails 72, and the fixed plate 74 is provided with a slider 73 sliding on the guide rail 72. Under the drive of the telescopic part of the reciprocating telescopic machine 71, the UV curing component 8 mounted on the fixed plate 74 can slide back and forth on the guide rail 72 through the slider 73. A guide rod 76 is fixedly installed on each of the two opening and closing brackets 75, and a spring 77 is sleeved on the outside of the guide rod 76; guide blocks 88 are respectively provided on both sides of the top of the two solidified shells 81, and the guide rod 76 passes through the guide blocks 88 on one side of the two solidified shells 81, and the two ends of the spring 77 respectively contact the two guide blocks 88, which makes the two solidified shells 81 slide on the guide rod 76 through the guide blocks 88. At the same time, due to the action of the spring 77, the outer guide plate 65 and the inner guide plate 66, the two solidified shells 81 can always maintain symmetrical and equidistant synchronous movement.

[0074] The guide assembly 6 includes an outer guide plate 65 and an inner guide plate 66 disposed on either side of the curing housing 81. The guide heads 83 disposed on either side of the curing housing 81 alternately form sliding pairs with the outer guide plates 65 and the inner guide plates 66 during reciprocation, dynamically maintaining a set distance between the curing housing 81 and the PET pressure-sensitive adhesive substrate 4 during reciprocation.

[0075] It is worth noting that in Figures 9-11 In the embodiment, the scraper assembly 86 further includes a transmission shaft 862 connected to the glue return portion 8612 by a bearing, and a spiral pushing blade 863 is provided on the outside of the transmission shaft 862; a ratchet 831 is coaxially mounted on the guide head 83, which drives a driving wheel 832 in one direction through the ratchet 831, and the axle of the driving wheel 832 is connected to the transmission shaft 862 through a belt transmission. When the curing shell 81 slides back and forth alternately on the outer guide plate 65 and the inner guide plate 66 of the guide assembly 6 through the guide head 83, the scraper assembly 86 between the two curing shells 81 will perform a clutch movement, and the scraper 861 will flatten the coating layer on the surface of the PET pressure-sensitive adhesive substrate 4 through the flattening portion 8611, so as to keep the glue on both sides fully adhered to the substrate and maintain the same thickness. The excess coating glue will be scraped into the glue return portion 8612;

[0076] The outer guide plate 65 located on one side of the solidifying shell 81 has a C-shaped cross-section, and the lower end of the outer guide plate 65 is longer than the upper end. The lower end of the inner guide plate 66 located on one side of the solidifying shell 81 is connected to a baffle 67 through a spring shaft. A limit block 68 is also provided on the inner guide plate 66. The limit block 68 is used to limit the rotation of the baffle 67 toward the outer guide plate 65.

[0077] Specifically, refer to Figure 6 As shown, when the curing shell 81 moves downward along the X-direction along with the guide head 83, the two curing shells 81 are pushed and moved away from each other along the Y-direction due to the action of the spring 77. As a result, the guide head 83 enters between the outer guide plate 65 and the inner guide plate 66 and moves downward along the outer guide plate 65. At this time, the two sets of scraper assemblies 86 do not contact the coating layer on the surface of the PET pressure-sensitive adhesive substrate 4.

[0078] When the guide head 83 moves downwardly along the X direction to the end of the outer guide plate 65, the guide head 83 will move along the Y direction due to the squeezing of the bent portion at the lower end of the outer guide plate 65, thereby causing the guide head 83 to drive the two scraper assemblies 86 to move closer. In the process of the guide head 83 moving closer, the baffle 67 will be pushed away, and under the action of the spring shaft, the baffle 67 will reset, preventing the guide head 83 from returning to the path between the outer guide plate 65 and the inner guide plate 66. At this time, when the guide head 83 is pulled upward along the X direction by the reciprocating assembly 7, it will move along the side of the inner guide plate 66 away from the outer guide plate 65, while keeping the two scraper assemblies 86 in contact with the coating layer on the surface of the PET pressure-sensitive adhesive substrate 4, and moving upward to complete the scraping and pressing operation of the coating layer on the surface of the PET pressure-sensitive adhesive substrate 4;

[0079] There is no need for frequent positioning and leveling during high-speed movements, which improves scraping accuracy and efficiency.

[0080] At the same time, refer to Figure 9 As shown, when the guide head 83 moves on the side of the inner guide plate 66 away from the outer guide plate 65, its coaxial ratchet 831 will push the driving wheel 832 to rotate, and then use the axle belt of the driving wheel 832 to drive the transmission shaft 862 to rotate. The spiral pushing blade 863 outside the transmission shaft 862 will recycle the excess glue that enters the glue return part 8612, avoiding dripping on the surface of the PET pressure-sensitive adhesive substrate 4 due to gravity factors, and also avoiding pollution of the equipment and the environment.

[0081] And, in Figure 5In the figure, the guide assembly 6 also includes a fixed frame 61, and the upper and lower parts of both sides of the fixed frame 61 are connected to adjustment rods 63 through rotating shafts, and the four adjustment rods 63 are synchronously driven by the belt of the adjustment motor 62; the outer ends of the adjustment rods 63 are sleeved with connecting blocks 64, and the upper and lower parts of the outer guide plates 65 and inner guide plates 66 distributed on both sides of the curing shell 81 are fixed by the connecting block 64 on one side of the fixed frame 61, and a cross frame is also provided between the outer guide plates 65 on both sides of the curing shell 81. The two ends of the adjusting rod 63 are provided with a forward thread and a reverse thread respectively, and the connection blocks 64 at both ends are provided with thread grooves that mesh with the forward thread and the reverse thread respectively; the adjusting rod 63 is used to adjust the distance between the two guide plates outside the curing shell 81. When coating the PET pressure-sensitive adhesive substrate 4 with different coating layer thickness specifications, the four adjusting rods 63 are synchronously driven to rotate by adjusting the belt of the motor 62, so that the adjusting rod 63 drives the connection block 64 with the thread grooves that mesh with the forward thread and the reverse thread at both ends to realize reverse synchronous transmission, thereby adjusting the distance between the two sets of guide plates to adjust the two sets of scraper assemblies 86 along the Figure 6 When the X direction moves upward, the spacing between the scraper assemblies 86 can adjust the thickness of the coating layer.

[0082] In this embodiment, refer to Figure 7 As shown, the straightening component 5 also includes a straightening telescopic machine 51 horizontally installed at the rear of the assembly frame 1, and its telescopic part is connected to a C-shaped slide 52, and the two groups of movable rollers 54 are respectively connected by the rotating shafts at the ends of the slide 52, and the two fixed rollers 53 are respectively connected to the assembly frame 1 in the travel direction of the movable rollers 54 through the rotating shafts. The movable rollers 54 are synchronously connected and driven to move horizontally through the slide 52, and the movable rollers 54 can be used to push the PET pressure-sensitive adhesive substrate 4 to adjust its vertical part passing through the UV curing component 8 so that it can be centered between the two groups of scraper assemblies 86, thereby reducing the situation where the pressure of the coating layers on both sides of the PET pressure-sensitive adhesive substrate 4 is different when scraping and pressing the coating layer, thereby improving the uniformity of the coating.

[0083] exist Figure 8-Figure 9 In the figure, the lower portion of the curing lamp holder 87 is tilted, and a plurality of LED-UV lamps 871 are evenly distributed on the surface of the curing lamp holder 87. The tilted LED-UV lamps 871 can increase the irradiation angle and prevent the coating layer from generating high temperatures, thereby reducing the risk of overheating and deformation of the PET pressure-sensitive adhesive substrate 4. A lampshade 872 is also attached to the outer side of the tilted portion of the curing lamp holder 87.

[0084] At the same time, positioning sensors 84 are provided between both sides of the working surfaces of the two curing shells 81, wherein one curing shell 81 is an infrared signal sending end and the other curing shell 81 is an infrared signal receiving end, which are used to monitor the distance between the two groups of curing shells 81 in real time and adjust the distance between the two groups of guide plates according to the thickness of the coating layer.

[0085] This solution integrates unwinding, straightening, plasma pretreatment, intelligent coating, dynamic scraping, UV curing and composite winding modules in a vertical layout, avoiding the problems caused by gravity during traditional coating and curing, and achieving efficient continuous production operations.

[0086] This solution uses a reciprocatingly driven double-sided UV curing assembly 8, combined with a guide plate switching mechanism to enable the scraper 861 to automatically complete the separation and pressing action during the upward and downward movement. During the high-speed movement, there is no need for frequent positioning and leveling, and no need for high-precision equipment. The requirements for the tensioning mechanism, scraper mechanism, and UV curing mechanism are lower. The spiral blades are used to recover excess glue to meet the requirements of precise control of the adhesive layer thickness, uniformity, and consistency of curing conditions on both sides when simultaneously coating the PET pressure-sensitive adhesive film.

[0087] The synchronous adjustment system dynamically controls the coating thickness and curing distance through sensor feedback. Combined with the tilted LED-UV low-temperature curing technology, it improves the uniformity and adhesion of double-sided coating while avoiding thermal deformation of the substrate, solving the problems of high pollution and unstable quality in traditional processes.

[0088] On the basis of the above-mentioned embodiment, the straightening and telescopic machine 51 and the reciprocating and telescopic machine 71 can adopt structures such as air cylinders, oil cylinders, and motors with lifting rods, which are not limited in this embodiment.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line, characterized by: It comprises an assembly frame (1), which is provided with the following components in order from top to bottom in the vertical direction: An unwinding roller (2) for continuously releasing the PET pressure-sensitive adhesive substrate (4); A straightening assembly (5) comprising two sets of fixed rollers (53) and a movable roller (54) arranged in a vertical direction along the assembly frame (1), wherein the two sets of movable rollers (54) are synchronously driven in a horizontal direction to maintain vertical calibration of the PET pressure-sensitive adhesive substrate (4) during the feeding process; A guide roller (11) is used for guiding the folding line of the material path of the PET pressure-sensitive adhesive substrate (4); Two sets of composite rollers (13) are symmetrically arranged along the upper and lower sides of the PET pressure-sensitive adhesive substrate (4) and are used to simultaneously heat-press composite the release film (12) onto both sides of the PET pressure-sensitive adhesive substrate (4); A winding roller (3) is used to wind up the composite pressure-sensitive adhesive finished film; Double-sided processing unit, including: A UV curing assembly (8) includes curing shells (81) disposed on both sides of the PET pressure-sensitive adhesive substrate (4), wherein the working surfaces of the two curing shells (81) are integrated with: a plasma pretreatment assembly (82), a plurality of horizontally distributed coating nozzles (851), a scraper assembly (86), and a curing lamp frame (87) from top to bottom; A reciprocating assembly (7) is used to drive the two groups of UV curing assemblies (8) to synchronously perform bidirectional linear motion along the traveling direction of the PET pressure-sensitive adhesive substrate (4); The guide assembly (6) includes an outer guide plate (65) and an inner guide plate (66) distributed on both sides of the curing shell (81). The guide heads (83) provided on both sides of the curing shell (81) alternately form sliding pairs with the outer guide plate (65) and the inner guide plate (66) during the reciprocating process, and dynamically maintain a set distance between the curing shell (81) and the PET pressure-sensitive adhesive substrate (4) during the reciprocating motion.

2. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 1, characterized in that: The straightening assembly (5) further comprises a straightening telescopic machine (51) horizontally mounted on the rear of the assembly frame (1), the telescopic portion of which is connected to a C-shaped slide (52), the two sets of movable rollers (54) being connected via rotating shafts at the ends of the slide (52), and the two fixed rollers (53) being connected to the assembly frame (1) in the direction of travel of the movable rollers (54) via rotating shafts.

3. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 1, characterized in that: The guide assembly (6) further comprises a fixing frame (61), wherein both upper and lower parts of both sides of the fixing frame (61) are connected to adjustment rods (63) via rotating shafts, and the four adjustment rods (63) are synchronously driven by the belt of the adjustment motor (62); Both ends of the adjusting rod (63) are sleeved with connecting blocks (64). The upper and lower parts of the outer guide plates (65) and the inner guide plates (66) distributed on both sides of the solidifying shell (81) are fixed by the connecting blocks (64) on one side of the fixing frame (61). A cross frame is also provided between the outer guide plates (65) on both sides of the solidifying shell (81).

4. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 3, characterized in that: The two ends of the adjusting rod (63) are respectively provided with a forward thread and a reverse thread, and the connection blocks (64) at the two ends are respectively provided with thread grooves that engage with the forward thread and the reverse thread; The adjusting rod (63) is used to adjust the distance between the outer guide plates of the two curing shells (81).

5. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 3, characterized in that: The outer guide plate (65) located on one side of the solidified shell (81) has a C-shaped cross section, and the lower end of the outer guide plate (65) is longer than the upper end; The lower end of the inner guide plate (66) located on one side of the solidifying shell (81) is connected to a baffle (67) via a spring shaft. A limit block (68) is also provided on the inner guide plate (66). The limit block (68) is used to limit the baffle (67) from rotating toward the outer guide plate (65).

6. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 1, characterized in that: The reciprocating assembly (7) further comprises a reciprocating telescopic machine (71) vertically mounted on the surface of the assembly frame (1), the telescopic portion of the reciprocating telescopic machine (71) being connected to a fixed plate (74), and vertically arranged opening and closing brackets (75) being mounted on both sides of the fixed plate (74); The surface of the assembly frame (1) is further provided with two vertically distributed guide rails (72), and a slider (73) is installed on the fixed plate (74) and slides on the guide rails (72).

7. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 6, characterized in that: A guide rod (76) is fixedly mounted on each of the two opening and closing brackets (75), and a spring (77) is sleeved on the outside of the guide rod (76); Guide blocks (88) are respectively provided on both sides of the top of the two solidified shells (81), the guide rod (76) passes through the guide blocks (88) on one side of the two solidified shells (81), and the two ends of the spring (77) respectively contact the two guide blocks (88).

8. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 1, characterized in that: A plurality of coating nozzles (851) are respectively provided with electromagnetic switch valves (85); the lower portion of the curing lamp rack (87) is inclined, and a plurality of LED-UV lamps (871) are evenly distributed on the surface of the curing lamp rack (87); a lampshade (872) is also clamped on the outer side of the inclined portion of the curing lamp rack (87); The scraper assembly (86) comprises a scraper (861) fixed by bolts below the coating nozzle (851); the scraper (861) has a semicircular cross-section and comprises a vertically arranged flattening portion (8611) and an arc-shaped glue return portion (8612).

9. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 8, characterized in that: The scraper assembly (86) further includes a transmission shaft (862) connected to the glue return portion (8612) by a bearing, and a spiral pushing blade (863) is provided on the outside of the transmission shaft (862); A ratchet (831) is coaxially mounted on the guide head (83), which unidirectionally drives a driving wheel (832) via the ratchet (831), and the axle of the driving wheel (832) is connected to the transmission shaft (862) via a belt drive.

10. The roll-to-roll PET pressure-sensitive adhesive film double-sided UV curing production line according to claim 1, characterized in that: Positioning sensors (84) are provided between both sides of the working surfaces of the two curing shells (81), wherein one curing shell (81) is an infrared signal transmitting end, and the other curing shell (81) is an infrared signal receiving end.

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