Coating equipment and process for thermal transfer ribbon coating

Abstract

The invention discloses a thermal transfer ribbon coating device and process, the thermal transfer ribbon coating device comprises: a feeding rack, the interior of which is rotatably connected with a feeding roller, and the feeding roller is provided with a base material in a rolling manner; a coating unit is installed on the downstream of the feeding roller and makes contact with the lower surface of the base material, and a vibration roller mechanism is arranged on the portion, located on the upper end face of the base material, of one side of the coating unit. A pressing roller frame is arranged on the downstream portion of the vibration roller mechanism, and a guide roller set is rotationally arranged on the lower end face of the pressing roller frame. A drying mechanism is arranged outside the pressing roller frame in the base material conveying direction. An extrusion roller frame is arranged at the downstream of the drying mechanism; a material receiving rack is arranged on one side of the extrusion roller frame; the base material can preferentially pass through the coating unit below the base material in the horizontal conveying process to be fully coated with the primer on the surface of the base material, so that the bonding effect of the subsequent base material and the coating film is enhanced, the primer can enhance the bonding force of the printing ink on the surface of the base material and the coating film, and spontaneous spreading of the printing ink is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of coating technology, and in particular relates to a thermal transfer carbon ribbon coating device and process. Background Art

[0002] Thermal transfer ribbons are mainly used for barcode printing for industrial automatic identification. As the recognition rate requirements for barcodes increase, the quality stability requirements for thermal transfer ribbons are also more stringent. In the traditional roller coating process, the adhesion between the ink layer and the coating film is not ideal, especially when the substrate surface is not adequately treated, which can easily cause ink to fall off or the pattern to become blurred during the transfer process. In traditional technology, thermal transfer ribbon coating is mostly done by roller coating. The roller coating process relies on the gap and pressure control of the coating roller, but due to slight unevenness or tension fluctuations on the substrate surface, it can easily lead to uneven ink layer thickness, which in turn affects the clarity and resolution of the barcode pattern.

[0003] Therefore, it is necessary to provide a thermal transfer carbon ribbon coating device and process to solve the problems raised in the above background technology. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: a thermal transfer carbon ribbon coating device, comprising: a feeding frame, a feeding roller rotatably connected to the feeding frame, and a substrate wound on the feeding roller;

[0005] A coating unit is installed downstream of the feeding roller, the coating unit contacts the lower surface of the substrate, and a vibration roller mechanism is provided on one side of the coating unit located on the upper end surface of the substrate;

[0006] A pressing roller frame is provided downstream of the vibrating roller mechanism, and a guide roller group is rotatably provided on the lower end surface of the pressing roller frame, and the coating film is transmitted on the guide roller group;

[0007] A drying mechanism is provided outside the laminating roller frame along the substrate transmission direction, and the drying mechanism is used to preliminarily heat the laminating substrate; an extrusion roller frame is provided downstream of the drying mechanism;

[0008] A material receiving frame is provided on one side of the squeezing roller frame, and a constant tension winding roller is arranged in the material receiving frame.

[0009] Furthermore, as a preference, the coating film in the guide roller group is transported into a pressing roller frame and pressed against the lower surface of the substrate;

[0010] The drying mechanism uses a composite heating mode of infrared radiation and hot air circulation to preliminarily heat the pressed substrate.

[0011] Furthermore, preferably, the coating unit uniformly coats the primer on the lower surface of the substrate while in rolling contact with the lower surface of the substrate.

[0012] Further, as a preference, the vibrating roller mechanism includes two symmetrically arranged two-axis drive frames, each of which is horizontally slidably connected to a connecting frame, an outer roller frame is horizontally fixed between the two connecting frames, and a plurality of steel rollers are equidistantly distributed between the outer roller frames, and both ends of the steel rollers are rotatably connected to the outer roller frames through bearings;

[0013] A plurality of mounting cavities are arranged in each of the steel rollers. A guide shaft is rotatably connected in the steel roller, and an eccentric shaft is fixed on the guide shaft in each of the mounting cavities.

[0014] Furthermore, preferably, a plurality of smoothing rollers are arranged below the outer roller frame, each of the smoothing rollers contacts the lower surface of the substrate, and the smoothing rollers are spaced apart from the steel rollers.

[0015] Furthermore, preferably, a drive motor is fixed to one side of the outer roller frame, a shaft sleeve is coaxially fixed to the output end of the drive motor, and one end of the guide roller is slidably connected to the shaft sleeve and rotates synchronously with the shaft sleeve;

[0016] A guide sleeve is rotatably connected to one side of the steel roller away from the shaft sleeve, a connecting shaft is coaxially slidably connected to the guide sleeve, and the other end of the guide shaft is rotatably connected to the connecting shaft;

[0017] A rotating shaft is coaxially connected to the steel roller, and one end of the rotating shaft is fixed to the guide sleeve;

[0018] A thread groove is provided on the inner wall of the guide sleeve, and the guide sleeve is threadedly connected to the connecting shaft through the thread groove.

[0019] Further, as a preference, the squeezing roller frame comprises a frame, on one end surface of which two positioning clamps are symmetrically fixed in an upper and lower manner, each positioning clamp is rotatably connected to a bracket arm, and the other end of each bracket arm is mounted with a positioning roller;

[0020] Hydraulic cylinders are hinged on the two positioning clamps, and the output end of each hydraulic cylinder is connected to the support arm on the opposite side of the positioning clamp.

[0021] Furthermore, as a preference, a main frame is vertically provided on the other end face of the frame, a transmission rod is symmetrically connected to the main frame in the vertical direction, and one end of the transmission rod is connected to the frame;

[0022] A pulse cylinder is installed on the main frame, and the output end of the pulse cylinder is connected to the transmission rod.

[0023] Furthermore, as a preferred embodiment, a thermal transfer carbon ribbon coating process comprises the following steps:

[0024] S1. Select a PET film of a specified thickness as the substrate. After corona treatment, inspect the surface for scratches and air bubbles. The substrate roll is then mounted on the loading roller of the loading frame and the unwinding tension is adjusted to ensure smooth substrate transport.

[0025] S2. The coating unit fully contacts and coats the lower surface of the substrate during transportation, applying the primer on the surface of the substrate with a coating amount of 2 to 3 g / m 2 After the initial coating, the substrate enters the vibrating roller mechanism. The steel rollers in the vibrating roller mechanism roll in contact with the substrate as it is transported. The eccentric shafts in each steel roller exert radial vibration on the upper surface of the substrate during rotation, allowing the primer to better penetrate into the pore layer on the substrate surface and eliminate unevenness and bubbles generated during the coating process. The smoothing roller can further smooth the lower surface of the substrate.

[0026] S3. The guide roller group synchronously transfers the coated film to the laminating roller frame, where the coated film is laminated to the lower surface of the substrate with a registration deviation of ≤0.1mm. The laminated substrate is initially heated by the drying mechanism's composite heating mode.

[0027] S4. The positioning roller in the squeeze roller frame applies bidirectional pressure to further improve the coating and bonding effect;

[0028] S5. After being transferred to the receiving rack, the substrate is taken up by a constant tension reel. Before rewinding, it is treated with an electrostatic eliminator to prevent the coil from sticking and to separate the coating film from the substrate.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] In the present invention, the substrate can preferentially pass through the coating unit below it during horizontal transportation to fully coat its surface with primer, thereby enhancing the subsequent bonding effect between the substrate and the coating film, and the primer can enhance the bonding force between the ink on the substrate surface and the coating film, and realize spontaneous spreading of the ink; the main vibration roller mechanism uses a plurality of arranged steel rollers to provide transmission vibration to the upper surface of the substrate, so that the primer coated on the lower surface of the substrate can better penetrate into the pore layer on the surface of the substrate, while eliminating the unevenness and bubbles generated during the coating process, and a plurality of smoothing rollers can continuously further level the primer on the surface of the substrate; in the present invention, after the substrate and the coating film are bonded, they can preferentially pass through the drying mechanism for preliminary drying, and then the extrusion roller frame uses a positioning roller to apply bidirectional counter-pressure, so that the ink on the surface of the substrate can better penetrate into the coating film. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 Schematic diagram of the structure of the vibration roller mechanism of the present invention;

[0033] Figure 3 Schematic diagram of the internal structure of the vibration roller mechanism of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the squeezing roller frame in the present invention;

[0035] Figure 5 Schematic diagram of the structure of the outer shaft plate in the present invention;

[0036] In the figure: 1. Feeding frame; 11. Feeding roller; 12. Coating unit; 13. Laminating roller frame; 14. Guide roller group; 15. Drying mechanism; 16. Receiving frame; 2. Vibrating roller mechanism; 21. Two-axis drive frame; 22. Connecting frame; 23. Outer roller frame; 24. Smoothing roller; 3. Squeezing roller frame; 31. Frame; 32. Positioning splint; 33. Frame arm; 34. Hydraulic cylinder; 35. Main frame; 36. Transmission rod; 4. Steel roller; 41. Mounting cavity; 42. Guide shaft; 43. Eccentric shaft; 44. Drive motor; 45. Bushing; 46. Guide sleeve; 47. Connecting shaft; 48. Rotating shaft; 5. Positioning roller; 51. Outer shaft plate; 52. Fine-tuning telescopic rod. DETAILED DESCRIPTION

[0037] See also Figure 1-Figure 5 In an embodiment of the present invention, a thermal transfer carbon ribbon coating device includes: a loading frame 1, a loading roller 11 being rotatably connected thereto, a substrate being wound on the loading roller 11, and a lower surface of the substrate being covered with an ink layer;

[0038] A coating unit 12 is installed downstream of the feeding roller 11. The coating unit 12 contacts the lower surface of the substrate. A vibration roller mechanism 2 is provided on one side of the coating unit 12, which is located on the upper end surface of the substrate. The vibration roller mechanism 2 can provide high-frequency vibration or small amplitude to the coated substrate, so that the coating layer is more evenly distributed on the surface of the substrate, reducing thickness deviation, and effectively removing bubbles or pinholes that may exist on the surface of the substrate during the coating process, thereby preventing these defects from affecting the transfer performance and durability of the carbon ribbon.

[0039] A pressing roller frame 13 is provided downstream of the vibrating roller mechanism 2, and a guide roller group 14 is rotatably provided on the lower end surface of the pressing roller frame 13, and the coating film is transmitted on the guide roller group 14;

[0040] A drying mechanism 15 is provided outside the laminating roller frame 13 along the substrate transmission direction. The drying mechanism 15 is used to preliminarily heat the laminating substrate. An extrusion roller frame 3 is provided downstream of the drying mechanism 15.

[0041] A material receiving frame 16 is provided on one side of the squeezing roller frame 3 , and a constant tension winding roller is arranged in the material receiving frame 16 .

[0042] In this embodiment, the coating film in the guide roller group 14 is transported into the pressing roller frame 13 and pressed against the lower surface of the substrate, thereby contacting and bonding with the substrate to achieve thermal transfer;

[0043] The drying mechanism 15 uses a composite heating mode of infrared radiation and hot air circulation to preliminarily heat the pressed substrate. The hot air circulation adopts a turbulent design, which improves the drying efficiency by 40%. It is also equipped with an online humidity monitor (accuracy ±0.1% RH) to control the drying parameters in a linked manner.

[0044] As a preferred embodiment, the coating unit 12 uniformly coats the primer on the lower surface of the substrate in rolling contact with the lower surface of the substrate. Its rotation direction is consistent with the substrate transmission direction, and different amounts of primer are coated according to the ink distribution on the substrate surface.

[0045] In this embodiment, the vibrating roller mechanism 2 includes two symmetrically arranged two-axis drive frames 21, each of which is horizontally slidably connected to a connecting frame 22, and an outer roller frame 23 is horizontally fixed between the two connecting frames 22. A plurality of steel rollers 4 are evenly distributed between the outer roller frames 23, and both ends of the steel rollers 4 are rotatably connected to the outer roller frames 23 through bearings. Each steel roller 4 can fully contact the upper surface of the substrate, and its overall length is not less than the width of the substrate. Therefore, when the substrate is horizontally transported, each steel roller 4 can rotate synchronously with it under the action of friction.

[0046] A number of mounting cavities 41 are arranged in each of the steel rollers 4, and a guide shaft 42 is rotatably connected in the steel roller 4. An eccentric shaft 43 is fixed on the guide shaft 42 in each of the mounting cavities, so that when the guide shaft 42 rotates at different speeds, the eccentric shaft 43 thereon can generate periodic vibration, and the vibration makes the primer more evenly distributed on the lower surface of the substrate, reducing thickness deviation; at the same time, it can further remove bubbles that may exist after the primer is applied.

[0047] In this embodiment, a plurality of smoothing rollers 24 are arranged below the outer roller frame 23. Each of the smoothing rollers 24 contacts the lower surface of the substrate. The smoothing rollers 24 are spaced apart from the steel roller 4. Each smoothing roller 24 can roll and level the primer material on the lower surface of the substrate during transmission.

[0048] In this embodiment, a drive motor 44 is fixed to one side of the outer roller frame 23, and a sleeve 45 is coaxially fixed to the output end of the drive motor 44. One end of the guide roller 42 is slidably connected to the sleeve 45 and rotates synchronously with the sleeve 45. Therefore, when the drive motor 44 works at different powers, it can drive the sleeve 45 to rotate at different speeds, so that the eccentric shaft 43 can generate periodic high-frequency vibration or low-frequency vibration. For example, for an area with a large amount of ink on the surface of the substrate, the corresponding amount of primer coating is large. The eccentric shaft 43 can provide periodic high-frequency vibration to quickly disperse the primer, avoid the primer from accumulating in the area with more ink, and ensure the uniformity of the coating layer.

[0049] A guide sleeve 46 is rotatably connected to the side of the steel roller 4 away from the shaft sleeve 45. A connecting shaft 47 is coaxially slidably connected to the guide sleeve 46 (the connecting shaft 47 only slides and does not rotate). The other end of the guide shaft 41 is rotatably connected to the connecting shaft 47.

[0050] A rotating shaft 48 is coaxially connected to the steel roller 4, and one end of the rotating shaft 48 is fixed to the guide sleeve 46;

[0051] A threaded groove is provided on the inner wall of the guide sleeve 46, and the guide sleeve 46 is threadedly connected to the connecting shaft 47 through the threaded groove. In particular, the connecting shaft 47 at one end of the guide shaft 42 can slide horizontally under the action of the threaded engagement of the guide sleeve 46 during the rotational motion. At this time, the eccentric shafts 43 on the guide shaft can be adjusted for axial displacement, thereby changing the vibration occurrence point. Therefore, the guide sleeve 46 can realize horizontal reciprocating adjustment of the eccentric shaft 43 during continuous forward and reverse rotation adjustment of the rotating shaft 48.

[0052] As a preferred embodiment, the squeezing roller frame 3 includes a frame 31, on one end surface of which two positioning clamps 32 are symmetrically fixed up and down, and each positioning clamp 32 is rotatably connected to a bracket arm 33, and the other end of each bracket arm 33 is mounted with a positioning roller 5;

[0053] A hydraulic cylinder 34 is hinged on each of the two positioning clamps 32, and the output end of each hydraulic cylinder 34 is connected to the support arm 33 on the opposite side of the positioning clamp 32. The two positioning rollers 5 can cooperate with each other to provide bidirectional counter-pressure to the substrate and the coating film, thereby promoting close contact between the coating film and the substrate, thereby improving adhesion.

[0054] In this embodiment, a main frame 35 is vertically provided on the other end surface of the frame 31. A transmission rod 36 is symmetrically connected to the main frame 35 in a transverse direction. One end of the transmission rod 36 is connected to the frame 31.

[0055] A pulse cylinder 37 is installed on the main frame 35, and the output end of the pulse cylinder 37 is connected to the transmission rod 36, so that during operation, the pulse cylinder 37 can provide high-frequency pulse power so that the positioning roller 5 can roll in contact with the surface of the substrate and the coating film, promote close contact between the coating film and the substrate, and enhance the adhesion of the ink.

[0056] In this embodiment, the support arm 33 is rotatably connected to an outer shaft plate 51, the roller frame of the positioning roller 5 is fixed to the outer shaft plate 51, and the support arm 33 is rotatably connected to a fine-tuning telescopic rod 52, one end of the fine-tuning telescopic rod 52 is connected to the outer shaft plate 51. As the best option, a visual sensor can be configured outside the drying mechanism 15, which can be used to scan the overall distribution of ink on the surface of the substrate, so that the extrusion roller frame can adjust the extrusion contact pressure, the reciprocating displacement frequency of the rolling operation of the positioning roller 5, etc. according to the specific ink distribution amount; for example, when the amount of ink on the surface of the substrate is large, on the one hand, the fine-tuning telescopic rod 52 can enhance the bidirectional counter-pressure of the positioning roller 5 under telescopic adjustment, and on the other hand, the pulse cylinder 37 provides high-frequency pulse power to drive the positioning roller 5 to fully roll, thereby enhancing the adhesion between the coating film and the substrate.

[0057] A thermal transfer carbon ribbon coating process comprises the following steps:

[0058] S1. A PET film of a specified thickness (12-15 μm) is selected as the substrate. After corona treatment, the surface is inspected for scratches and air bubbles. The corona treatment voltage is set to 10-15 kV, and the treatment time is controlled to 1-2 seconds. Defect inspection is performed using a visual inspection system to ensure uniform surface treatment and no overburning. The substrate roll is then mounted on the loading roller 11 of the loading frame 1, and the unwinding tension is adjusted to ensure smooth substrate transport.

[0059] S2. The coating unit 12 is in full contact with the lower surface of the substrate during the transmission, and the primer is applied to the surface of the substrate with a coating amount of 2 to 3 g / m 2 After the initial coating, the substrate enters the vibrating roller mechanism 2. The steel rollers 4 in the vibrating roller mechanism 2 roll in contact with the substrate as it is transported. The eccentric shafts 43 in each steel roller 4 exert radial vibration on the upper surface of the substrate during rotation, allowing the primer to better penetrate into the pore layer on the surface of the substrate and eliminate unevenness and bubbles generated during the coating process. The smoothing roller 24 can further smooth the lower surface of the substrate. The surface of the smoothing roller 24 must be kept smooth and free of defects to avoid secondary scratches on the substrate surface.

[0060] S3. The guide roller group 14 transmits the coating film synchronously to the laminating roller frame 13, and the coating film is laminated on the lower surface of the substrate, with a positioning deviation of ≤0.1mm; the laminated substrate is initially heated by the composite heating mode of the drying mechanism 15;

[0061] S4. The positioning roller 5 in the squeeze roller frame 3 applies bidirectional pressure to further improve the coating and bonding effect;

[0062] S5. After being transferred to the receiving frame 16, the substrate is taken up by a constant tension reel. A tension sensor is used to monitor the reeling tension in real time. Before reeling, the substrate is treated with an electrostatic eliminator to prevent adhesion of the coil. At the same time, the coating film is separated from the substrate. During the separation process, it is necessary to ensure that there is no residual adhesion between the coating film and the substrate surface to avoid affecting subsequent use.

[0063] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A thermal transfer carbon ribbon coating device, characterized in that: It includes: loading A frame (1) is rotatably connected to a feeding roller (11) inside thereof, and a substrate is rolled up on the feeding roller (11); A coating unit (12) is installed downstream of the feeding roller (11), the coating unit (12) contacts the lower surface of the substrate, and a vibration roller mechanism (2) is provided on one side of the coating unit (12) located on the upper end surface of the substrate; A pressing roller frame (13) is provided downstream of the vibrating roller mechanism (2), and a guide roller group (14) is rotatably provided on the lower end surface of the pressing roller frame (13), and a coating film is transmitted on the guide roller group (14); A drying mechanism (15) is provided outside the laminating roller frame (13) along the substrate transmission direction, and the drying mechanism (15) is used to preliminarily heat the laminating substrate; an extrusion roller frame (3) is provided downstream of the drying mechanism (15); A material receiving frame (16) is provided on one side of the squeezing roller frame (3), and a constant tension winding roller is arranged in the material receiving frame (16).

2. The thermal transfer carbon ribbon coating device according to claim 1, characterized in that: The coating film in the guide roller group (14) is transported into the pressing roller frame (13) and pressed against the lower surface of the substrate; The drying mechanism (15) uses a composite heating mode of infrared radiation and hot air circulation to preliminarily heat the pressed substrate.

3. The thermal transfer carbon ribbon coating device according to claim 1, characterized in that: The coating unit (12) uniformly coats the primer on the lower surface of the substrate while in rolling contact with the lower surface of the substrate.

4. The thermal transfer carbon ribbon coating device according to claim 1, characterized in that: The vibrating roller mechanism (2) comprises two symmetrically arranged two-axis driving frames (21), each of the two-axis driving frames (21) is horizontally slidably connected to a connecting frame (22), an outer roller frame (23) is horizontally fixed between the two connecting frames (22), and a plurality of steel rollers (4) are evenly distributed between the outer roller frames (23), and both ends of the steel rollers (4) are rotatably connected to the outer roller frames (23) through bearings; A plurality of mounting cavities (41) are arranged in each of the steel rollers (4), a guide shaft (42) is rotatably connected in the steel roller (4), and an eccentric shaft (43) is fixed on the guide shaft (42) and located in each of the mounting cavities.

5. The thermal transfer carbon ribbon coating device according to claim 4, characterized in that: A plurality of smoothing rollers (24) are arranged and distributed below the outer roller frame (23), each of the smoothing rollers (24) contacts the lower surface of the substrate, and the smoothing rollers (24) are spaced apart from the steel rollers (4).

6. The thermal transfer carbon ribbon coating device according to claim 4, characterized in that: A driving motor (44) is fixed to one side of the outer roller frame (23), a shaft sleeve (45) is coaxially fixed to the output end of the driving motor (44), and one end of the guide roller (42) is slidably connected in the shaft sleeve (45) and rotates synchronously with the shaft sleeve (45); A guide sleeve (46) is rotatably connected to the side of the steel roller (4) away from the shaft sleeve (45), a connecting shaft (47) is coaxially slidably connected to the guide sleeve (46), and the other end of the guide shaft (41) is rotatably connected to the connecting shaft (47); A rotating shaft (48) is coaxially connected to the steel roller (4), and one end of the rotating shaft (48) is fixed to the guide sleeve (46); A thread groove is provided on the inner wall of the guide sleeve (46), and the guide sleeve (46) is threadedly connected to the connecting shaft (47) through the thread groove.

7. The thermal transfer carbon ribbon coating device according to claim 1, characterized in that: The squeezing roller frame (3) comprises a frame (31), on one end surface of which two positioning clamps (32) are fixed symmetrically in the upper and lower directions, each positioning clamp (32) is rotatably connected to a support arm (33), and the other end of each support arm (33) is mounted with a positioning roller (5); A hydraulic cylinder (34) is hinged on each of the two positioning clamping plates (32), and an output end of each hydraulic cylinder (34) is connected to the support arm (33) on the opposite side of the positioning clamping plate (32).

8. The thermal transfer carbon ribbon coating device according to claim 7, characterized in that: A main frame (35) is vertically provided on the other side end surface of the frame (31), and a transmission rod (36) is symmetrically connected to the main frame (35) in the horizontal direction, and one end of the transmission rod (36) is connected to the frame (31); A pulse cylinder (37) is installed on the main frame (35), and the output end of the pulse cylinder (37) is connected to the transmission rod (36).

9. The thermal transfer carbon ribbon coating device according to claim 7, characterized in that: The support arm (33) is rotatably connected to an outer shaft plate (51), a roller frame of the positioning roller (5) is fixed to the outer shaft plate (51), and a fine-tuning telescopic rod (52) is rotatably connected to the support arm (33), one end of the fine-tuning telescopic rod (52) is connected to the outer shaft plate (51).

10. A thermal transfer carbon ribbon coating process, which uses a thermal transfer carbon ribbon coating device according to claims 1-9, characterized in that: It includes the following steps: S1. Select a PET film of a specified thickness as the substrate, and after corona treatment, check whether there are scratches or air bubble defects on the surface; then install the substrate roll onto the loading roller (11) of the loading frame (1), adjust the unwinding tension, and ensure smooth transmission of the substrate; S2. The coating unit (12) fully contacts and coats the lower surface of the substrate during the transmission, and the primer is coated on the surface of the substrate with a coating amount of 2 to 3 g / m 2 After the initial coating, the substrate enters the vibrating roller mechanism (2). The steel roller (4) in the vibrating roller mechanism (2) rolls with the substrate during the transmission of the substrate, and the eccentric shaft (43) in each steel roller (4) applies radial vibration to the upper surface of the substrate during rotation, so that the primer material can better penetrate into the pore layer on the surface of the substrate and eliminate the unevenness and bubbles generated during the coating process; and the smoothing roller (24) can provide a further smoothing effect on the lower surface of the substrate; S3. The guide roller group (14) synchronously transmits the coated film to the laminating roller frame (13), and the coated film is laminated on the lower surface of the substrate with a positioning deviation of ≤0.1mm; the laminated substrate is initially heated by the composite heating mode of the drying mechanism (15); S4. The positioning roller (5) in the extrusion roller frame (3) applies bidirectional pressure to further improve the coating and bonding effect; S5. After being transferred to the receiving rack (16), the substrate is taken up by a constant tension reel and treated by an electrostatic eliminator before reeling to prevent the coil from sticking together and to separate the coating film from the substrate.

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