A double station paint printing device

Abstract

The application relates to a double-station coating printing device, and relates to the technical field of printing equipment. The coating printing device comprises unwinding mechanisms, printing mechanisms and winding mechanisms arranged in sequence. The unwinding mechanisms are used for unwinding and conveying film coiled materials into the printing mechanisms. The printing mechanisms are used for coating printing on the film coiled materials. The winding mechanisms are used for winding the film coiled materials after the coating printing through the printing mechanisms. The printing mechanisms comprise single-color printing machines, the number of the single-color printing machines is not less than two, the multiple single-color printing machines are sequentially and spaced apart along the conveying direction of the film coiled materials, and the film coiled materials sequentially pass through the multiple single-color printing machines. Drying machines are arranged between the adjacent two single-color printing machines, and the film coiled materials pass through the drying machines along the conveying direction of the film coiled materials. The application can realize continuous and automatic multiple printing of the film coiled materials, reduce the complexity of the printing process, and thus reduce the printing time and cost.

Description

Technical Field

[0001] This application relates to the technical field of printing equipment, and in particular to a dual-station coating printing apparatus. Background Technology

[0002] In modern industrial manufacturing, film rolls are widely used as a key substrate in fields such as electronic products, decorative panels, functional labels, and high-end packaging. To enhance the aesthetics, brand recognition, and functionality of products, high-quality multi-color coating printing is typically required on the surface of these films.

[0003] Currently, the general process for multi-color coating printing on film rolls is as follows: First, a printing press is used to print the first color on the film roll, which is then wound up to form a semi-finished roll. The operator then removes this semi-finished roll and transfers it to another printing press. The second printing press continues to print the second color on the semi-finished roll, thus achieving two-color coating printing on the film roll. For each additional color to be printed on the film roll, an additional printing press is required to print the corresponding color coating.

[0004] Regarding the aforementioned technologies, in the existing multi-color coating printing of film rolls, the film rolls need to be transferred between multiple printing presses, which interrupts the printing process. Furthermore, each time the film roll is installed on the corresponding printing press, it needs to be re-aligned and tensioned, resulting in poor continuity of the entire printing work, making the entire printing process cumbersome and complicated, and increasing the time and cost of printing. Summary of the Invention

[0005] This application provides a dual-station coating printing device, the purpose of which is to realize continuous automatic multiple printing of film rolls, reduce the cumbersomeness of the printing process, and thus reduce printing time and cost.

[0006] The dual-station coating printing device provided in this application adopts the following technical solution: A dual-station coating printing apparatus includes an unwinding mechanism, a printing mechanism, and a rewinding mechanism arranged sequentially. The unwinding mechanism unwinds and conveys a film roll to the printing mechanism, the printing mechanism performs coating printing on the film roll, and the rewinding mechanism rewinds the film roll after coating printing through the printing mechanism. The printing mechanism includes at least two monochrome printing machines, which are spaced apart sequentially along the conveying direction of the film roll, and the film roll passes through the monochrome printing machines sequentially. A dryer is provided between two adjacent monochrome printing machines, and the film roll passes through the dryer along its own conveying direction.

[0007] By adopting the above technical solution, the printing mechanism utilizes a coordinated design of multiple monochrome printing presses. After the unwinding mechanism unwinds the film roll, the film roll passes sequentially through multiple monochrome printing presses and is finally wound up by the rewinding mechanism. During this process, each monochrome printing press can perform monochrome coating printing on the film roll, thus achieving multicolor coating printing on the film roll during rewinding.

[0008] Based on this, since a dryer is installed between two adjacent monochrome printing presses, the dryer can dry and cure the coating on the film roll, so that the coating adheres stably to the film roll. This can prevent the subsequent monochrome printing press from affecting the previously printed content when printing coating on the film roll, thus ensuring the printing quality of multicolor coating on the film roll.

[0009] Therefore, the coating printing apparatus of this application can continuously perform multiple coating printings on the surface of the film roll during the film roll conveying process, which can reduce the cumbersomeness of the multi-color printing process, thereby reducing the time and cost of multi-color printing.

[0010] Optionally, a corona generator is also included, located between the printing mechanism and the unwinding mechanism, and the film roll passes through the corona generator in its own conveying direction.

[0011] By adopting the above technical solution, corona treatment of the surface of the film roll material using a corona machine can effectively improve the adhesion and wettability of the film material surface, thereby enhancing the bonding strength between the coating and the film, and improving printing quality and durability.

[0012] Optionally, a feeding correction mechanism is also included, which is located between the printing mechanism and the unwinding mechanism, and the film roll passes through the feeding correction mechanism along its own conveying direction.

[0013] By adopting the above technical solution, the feeding correction mechanism can correct the film roll before it enters the first monochrome printing press, realizing automatic alignment of the film roll and thus ensuring the accuracy of subsequent color printing.

[0014] Optionally, a relay conveyor roller group is provided on one side of the monochrome printing machine, and the film roll passes through the monochrome printing machine and the corresponding relay conveyor roller group in sequence along its own conveying direction. The relay conveyor roller group is used to convey the film roll. An auxiliary conveyor roller group is provided on one side of the dryer, and the film roll passes through the dryer and the corresponding auxiliary conveyor roller group in sequence along its own conveying direction. The auxiliary conveyor roller group is used to convey the film roll.

[0015] By adopting the above technical solution, with the intermediate conveyor roller group in place, the film roll can be actively output by the corresponding intermediate conveyor roller group after passing through the corresponding monochrome printing press. Similarly, with the auxiliary conveyor roller group in place, the film roll can be actively output by the corresponding auxiliary conveyor roller group after passing through the corresponding dryer. By setting up an active conveyor roller group after key processes, the film roll is ensured to run with stable and constant tension throughout the entire production line, thereby improving the stability of the film roll conveying during the printing process.

[0016] Optionally, the relay conveyor roller group includes a drive roller, which is rotatably connected to the monochrome printing machine, and a drive motor is coaxially connected to one end of the drive roller; the relay conveyor roller group also includes a driven roller, which is connected to the monochrome printing machine, the drive roller is axially arranged along the width direction of the film roll, the drive roller and the driven roller are arranged parallel and spaced apart, and the film roll passes through the gap between the drive roller and the driven roller along its own conveying direction; the driven roller is provided with two limiting conveyors, which are spaced apart along the axial direction of the driven roller, the limiting conveyors abut against the outer wall of the drive roller, and the film roll passes through the space between the limiting conveyors and the drive roller.

[0017] By adopting the above technical solution, the relay conveyor roller assembly, through the coordinated design of the active roller, active motor, driven roller, and limiting conveyor components, ensures that the edges of the film roll along its width are pressed against the surface of the active roller by corresponding limiting conveyor components. The pressure applied by the limiting conveyor components causes the film roll to adhere to the surface of the active roller. Driven by the active roller, the active roller, in conjunction with the two limiting conveyor components, achieves the conveying function of the film roll. Furthermore, because the two limiting conveyor components are spaced apart, the relay conveyor roller assembly is prevented from contacting the printing coating on the surface of the film roll, thus ensuring printing quality.

[0018] Optionally, the driven roller is slidably connected to the limiting conveyor along its own axial direction, and the limiting conveyor is detachably connected to the driven roller.

[0019] By adopting the above technical solution, based on the design of the connection relationship between the limiting conveyor and the driven roller, it is easy to adjust the position of the limiting conveyor so that the width between the two limiting conveyors can be adapted to film rolls of different widths, which can improve the applicability of the relay conveyor roller group.

[0020] Optionally, the system also includes a stacking rack, in which two monochrome printing machines are arranged, spaced apart vertically; a dryer is arranged in the stacking rack, and the dryer and the upper monochrome printing machine are spaced apart horizontally; a connecting roller group is also provided in the stacking rack, located between the dryer and the lower monochrome printing machine, and the connecting roller group is used to guide the film roll output from the dryer into the lower monochrome printing machine.

[0021] By adopting the above technical solution, the stacked frame design allows two monochrome printing presses to be arranged in a stacked state, thus enabling them to be distributed side by side. With this design, based on the coordinated design of the connecting roller group, the film roll starts from the unwinding mechanism, enters the upper monochrome printing press for the first printing, then enters the dryer, and then, guided by the connecting roller group, is conveyed downwards to the lower monochrome printing press for the second printing. This allows for continuous two-color coating printing on the surface of the film roll, and this design reduces the equipment's footprint, saving production space.

[0022] Optionally, the stacking frame is further provided with a skip roller group, which is located between the dryer and the winding mechanism. The skip roller group can guide the film roll output by the dryer into the winding mechanism.

[0023] By adopting the above technical solution, the skip roller design allows the film roll to be directly guided to the winding mechanism for winding after being dried in the dryer, thus requiring only one printing operation.

[0024] Therefore, with the cooperation of the skip roller group and the connecting roller group, the film roll is printed once as it passes through the skip roller group, and at this time the film roll can bypass the lower monochrome printing press, thereby shortening the length of the entire printing line and improving printing efficiency. When the film roll passes through the connecting roller group, it can be printed twice. Therefore, this improves the applicability of the coating printing apparatus of this application.

[0025] Optionally, there are two unwinding mechanisms and two rewinding mechanisms, with the two unwinding mechanisms located on the same side of the monochrome printing press and the two rewinding mechanisms located on the same side of the monochrome printing press. The unwinding mechanism can unwind the film roll and convey it to any one of the monochrome printing presses, and the rewinding mechanism can rewind the film roll that has passed through any one of the monochrome printing presses.

[0026] By adopting the above technical solution, since there are two unwinding mechanisms and two rewinding mechanisms, and each unwinding mechanism can feed film rolls to any single-color printing press, and each rewinding mechanism can rewind film rolls output from any single-color printing press, the coating printing apparatus of this application has the following two working modes under this design: The system operates in a dual-line parallel mode. Specifically, the first unwinding mechanism supplies material to the upper monochrome printing press, where the film roll undergoes one printing cycle. After printing, the film roll is wound up by the first rewinding mechanism. Simultaneously, the second unwinding mechanism supplies material to the lower monochrome printing press, where the film roll undergoes one printing cycle. After printing, the film roll is wound up by the second rewinding mechanism. This operating mode allows for two independent monochrome printing production lines to perform monochrome printing simultaneously.

[0027] Two-color serial operation mode. One unwinding mechanism supplies material to the upper single-color printing press. The film roll passes sequentially through the upper single-color printing press, the dryer, and the lower single-color printing press, and is then wound up by a winding mechanism. The remaining unwinding and winding mechanisms are not in operation. During this process, two printings can be performed on the film surface, thereby realizing two-color coating printing.

[0028] Therefore, such a design can improve the applicability of the printing coating apparatus of this application.

[0029] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, through the coordinated design of multiple monochrome printing presses, enables the film roll to be printed multiple times during the transport process, which reduces the complexity of the multicolor printing process and thus reduces the time and cost of multicolor printing.

[0030] 2. This application, through the design of the relay conveyor roller group, can realize the conveying of the printed film roll without affecting the coating on the film roll, thereby ensuring the printing quality of the coating on the film roll.

[0031] 3. This application, through the combined design of stacking frame, double unwinding mechanism, double rewinding mechanism, connecting roller group, and skipping roller group, enables the coating printing device to switch between multiple different printing modes, thereby improving the applicability of the coating printing device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the coating printing apparatus of Embodiment 1 of this application.

[0033] Figure 2 This is a schematic diagram of the overall structure of the unwinding mechanism, corona machine, and feed correction mechanism in Embodiment 1 of this application.

[0034] Figure 3This is a schematic diagram of the overall structure of the monochrome printing press according to Embodiment 1 of this application.

[0035] Figure 4 This is a schematic diagram of the overall structure of the relay conveyor roller group in Embodiment 1 of this application.

[0036] Figure 5 This is a schematic diagram of the overall structure of the drying oven in Embodiment 1 of this application.

[0037] Figure 6 yes Figure 5 A magnified schematic diagram of part A in the middle.

[0038] Figure 7 This is a schematic diagram of the overall structure of the discharge correction mechanism and the winding mechanism of Embodiment 1 of this application.

[0039] Figure 8 This is a schematic diagram of the overall structure of the coating printing apparatus of Embodiment 2 of this application.

[0040] Figure 9 This is a schematic diagram of the film roll conveying process of the coating printing apparatus in Embodiment 2 of this application in the first working mode.

[0041] Figure 10 This is a schematic diagram of the film roll conveying process of the coating printing apparatus in Embodiment 2 of this application in the second working mode.

[0042] Figure 11 This is a schematic diagram of the film roll conveying process of the coating printing apparatus in the third working mode of Embodiment 2 of this application.

[0043] Figure 12 This is a schematic diagram of the overall structure of the coating printing apparatus of Embodiment 3 of this application.

[0044] Figure 13 This is a schematic diagram of the film roll conveying process between the lower unwinding and the upper monochrome printing machine in Embodiment 3 of this application.

[0045] Figure 14 This is a schematic diagram of the film roll conveying process between the lower monochrome printing machine and the upper winding mechanism in Embodiment 3 of this application.

[0046] In the diagram, 1. Unwinding mechanism; 11. Unwinding frame; 12. Unwinding roller; 13. Intermediate roller; 14. Pressure roller assembly; 141. Fixed seat; 142. Fixed roller; 143. Moving roller; 144. Pressure cylinder; 145. Mounting block; 2. Corona generator; 3. Feed correction mechanism; 4. Printing mechanism; 41. Single-color printing machine; 411. Printing platform; 412. Screen printing machine; 42. Intermediate conveyor roller assembly; 421. Driving roller; 422. Driven roller; 423. Limiting conveyor component; 4231. Rubber ring; 4232. Mounting ring; 4233. Locking screw; 43. Drying 44. Auxiliary conveyor roller assembly; 441. Roller seat; 442. Power roller; 443. Auxiliary roller; 444. Guide limit component; 445. Tension adjustment component; 4451. Adjusting block; 4452. Adjusting bolt; 4453. Adjusting nut; 45. Buffer box; 46. Connecting roller assembly; 461. Connecting roller; 47. Skip roller assembly; 471. Skip roller; 48. Wire changing roller assembly; 481. Wire changing roller; 5. Discharge correction mechanism; 6. Rewinding mechanism; 61. Rewinding frame; 62. Rewinding roller; 63. Intermediate roller; 64. Pressing roller assembly; 7. Guide roller mechanism; 8. Stacking frame. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1 -Appendix Figure 14 This application will be described in further detail below.

[0048] Example 1: A dual-station coating printing device, referring to... Figure 1 It includes an unwinding mechanism 1, a printing mechanism 4, and a rewinding mechanism 6, which are arranged sequentially. The printing mechanism 4 includes multiple monochrome printing presses 41, which are arranged sequentially along the interval direction between the unwinding mechanism 1 and the rewinding mechanism 6, and a dryer 43 is arranged between two adjacent monochrome printing presses 41.

[0049] During the film roll printing process, the unwinding mechanism 1 unwinds the film roll and conveys it forward through all the monochrome printing presses 41 and the dryer 43, finally being wound up by the rewinding mechanism 6. In this process, each monochrome printing press 41 can perform one coating print on the surface of the film roll, while the dryer 43 dries the coating on the film roll. Therefore, multiple coating prints can be performed continuously on the surface of the film roll during its conveying process. The number of prints does not exceed the number of monochrome printing presses 41.

[0050] Reference Figure 1In this embodiment, the coating printing device is a dual-station design, with two single-color printing machines 41 and one corresponding dryer 43. Therefore, after passing through the coating printing device of this embodiment, two different colors of coating can be printed on the surface of the film roll, thus achieving two-color printing.

[0051] Reference Figure 1 and Figure 2 The unwinding mechanism 1 includes an unwinding frame 11, on which an unwinding roller 12 is rotatably mounted. The unwinding roller 12 is axially arranged in the horizontal direction, and an unwinding motor is coaxially connected to the unwinding roller 12. The unwinding motor is connected to the unwinding frame 11. In this embodiment, the unwinding roller 12 is an air-expanding shaft and is connected to an air supply pipeline.

[0052] Reference Figure 2 The unwinding frame 11 is also provided with several intermediate rollers 13, which are arranged parallel to the unwinding rollers 12. The intermediate rollers 13 are rotatably connected to the unwinding frame 11. The several intermediate rollers 13 are arranged at intervals along the conveying direction of the film roll. The film roll passes through the several intermediate rollers 13 in sequence along its own conveying direction, and the outer side of the intermediate rollers 13 contacts the film roll. Reference Figure 2 The unwinding frame 11 is also equipped with a pressure roller group 14, and several intermediate rollers 13 are located between the pressure roller group 14 and the unwinding roller 12 along the conveying direction of the film roll.

[0053] Reference Figure 2 In this embodiment, the pressure roller assembly 14 includes a fixed base 141, a fixed roller 142, a movable roller 143, and a pressure cylinder 144. The fixed base 141 is connected to the unwinding frame 11. The fixed roller 142 and the movable roller 143 are both arranged parallel to the unwinding roller 12. The fixed roller 142 and the movable roller 143 are both rotatably connected to the fixed base 141. The movable roller 143 is spaced above the fixed roller 142, and the film roll passes through the gap between the fixed roller 142 and the movable roller 143. The fixed base 141 is fixedly connected to the unwinding frame 11. Both ends of the fixed roller 142 are rotatably connected to the fixed base 141. The moving roller 143 has mounting blocks 145 rotatably installed at both ends. The mounting blocks 145 are slidably connected to the fixed base 141 in the vertical direction. There are two pressing cylinders 144, both of which are vertically installed on the fixed base 141. The pressing cylinders 144 and the mounting blocks 145 are arranged one-to-one. The pressing cylinders 144 are installed on the fixed base 141, and the driving end of the pressing cylinders 144 is connected to the mounting blocks 145. The pressing cylinders 144 are vertically arranged.

[0054] With the cooperation of the unwinding roller 12, several intermediate rollers 13 and the pressure roller group 14, the unwinding mechanism 1 can stably unwind the film roll, thereby realizing the feeding function of the film roll.

[0055] Reference Figure 2The staggered arrangement of several intermediate rollers 13 creates an "S"-shaped path for the film roll during transport. This eliminates any curling or wrinkles in the unwound film roll as it passes through the intermediate rollers 13, and improves the uniform tension of the film roll. The pressure roller assembly 14, driven by a pressure cylinder 144, presses down the moving roller 143, applying pressure to the film roll and ensuring that the film roll output from the unwinding mechanism 1 has a constant and appropriate tension. Thus, with the cooperation of the intermediate rollers 13 and the pressure assembly, the unwound film roll can be transported in a flat and stable state.

[0056] Reference Figure 1 and Figure 2 The coating printing apparatus also includes a corona machine 2, which is located between the unwinding mechanism 1 and the first monochrome printing machine 41 along the conveying direction of the film roll, and the film roll passes through the corona machine 2. The corona machine 2 can perform corona treatment on the surface of the film roll, which can improve the adhesion and wettability of the film material surface, thereby enhancing the bonding strength between the printing coating and the film.

[0057] Reference Figure 1 and Figure 2 The coating printing apparatus also includes a feeding correction mechanism 3, which is located between the corona machine 2 and the first monochrome printing machine 41 along the conveying direction of the film roll.

[0058] In this embodiment, the feeding and correction mechanism 3 includes an automatic correction machine and an edge distance sensor. The automatic correction machine is located between the corona machine 2 and the first monochrome printing machine 41 along the conveying direction of the film roll, which ensures that the film roll passing through the corona machine 2 is conveyed to the automatic correction machine. The edge distance sensor is mounted on the automatic correction machine, and the film roll passes between the edge distance sensor and the automatic correction machine. The edge distance sensor is located at the edge of the film roll along the width direction of the film roll, with its detection end facing the film roll, and the edge distance sensor is electrically connected to the automatic correction machine.

[0059] The feeding and correction mechanism 3 uses an edge distance sensor to detect the position of the film roll edge in real time to determine if the film roll has shifted. When the edge distance sensor detects a shift in the film roll edge position, it sends a signal to the controller of the automatic correction machine. The controller then controls the automatic correction machine to automatically operate, restoring the film roll to its normal position. This prevents film roll shifting during feeding, thus ensuring printing quality.

[0060] Reference Figure 1 and Figure 3The monochrome printing machine 41 includes a printing platform 411 and a screen printing machine 412. The printing platform 411 is horizontally arranged. The feeding correction mechanism 3 and the printing platform 411 are arranged sequentially along the conveying direction of the film roll. The screen printing machine 412 is spaced above the printing platform 411, and the film roll passes between the screen printing machine 412 and the printing platform 411 along its own conveying direction.

[0061] When the film roll is conveyed between the printing platform 411 and the screen printing machine 412, the screen printing machine 412 performs one coating printing operation on the film roll.

[0062] Reference Figure 3 and Figure 4 A relay conveyor roller group 42 is provided on the printing platform 411. The relay conveyor roller group 42 is located between the screen printing machine 412 and the corresponding dryer 43 along the conveying direction of the film roll.

[0063] Reference Figure 4 The relay conveyor roller group 42 includes an active roller 421, which is axially arranged along the width direction of the film roll. Both ends of the active roller 421 are rotatably connected to the printing platform 411, and an active motor is coaxially connected to one end of the active roller 421.

[0064] Reference Figure 3 and Figure 4 The relay conveyor roller group 42 also includes two driven rollers 422. Both ends of the driven rollers 422 are connected to the printing platform 411. The two driven rollers 422 are arranged parallel to and spaced apart from the drive roller 421. One driven roller 422 is arranged vertically above the drive roller 421, and the other driven roller 422 is arranged horizontally on the side of the drive roller 421 away from the screen printing machine 412. The film roll passes through the gap between the two driven rollers 422 and the drive roller 421 in sequence along its own conveying direction.

[0065] Reference Figure 4 Two limiting conveyors 423 are provided on the driven roller 422. The driven roller 422 is slidably connected to the limiting conveyors 423 along its own axial direction, and the limiting conveyors 423 are detachably connected to the driven roller 422. The two limiting conveyors 423 are spaced apart along the axial direction of the driven roller 422. The limiting conveyors 423 abut against the outer wall of the driving roller 421, and the film roll passes between the limiting conveyors 423 and the driving roller 421.

[0066] Reference Figure 4In this embodiment, the limiting conveyor 423 includes a rubber ring 4231, a mounting ring 4232, and a locking screw 4233. The mounting ring 4232 is coaxially sleeved on the driven roller 422 and is slidably connected to the driven roller 422 along its own axial direction. The locking screw 4233 is radially arranged along the driven roller 422 and is screwed to the mounting ring 4232. One end of the locking screw 4233 abuts against the driven roller 422. The rubber ring 4231 is coaxially connected to the mounting ring 4232 and the outer wall of the rubber ring 4231 abuts against the outer wall of the driving roller 421. The edge of the film roll passes between the corresponding rubber ring 4231 and the driving roller 421.

[0067] With the cooperation of the driving roller 421, the driven roller 422 and the limiting conveyor 423, the relay conveyor roller group 42 can actively convey the film roll, which can actively pull the film roll out from the corresponding monochrome printing machine 41, thus assisting in the conveying of the film roll.

[0068] Reference Figure 4 The design of the two limiting conveyors 423 allows for adjustment of the distance between them on the driven roller 422 to accommodate film rolls of different widths. The rubber rings 4231 on the limiting conveyors 423 press the edges of the film roll against the outside of the driving roller 421. This design ensures that, on one hand, the rubber rings 4231 allow the driving roller 421 to stably convey the film roll; on the other hand, the two rubber rings 4231 pressing against the edges of the film roll prevents interference with the coating on the film roll; and on the other hand, the rubber rings 4231 also prevent lateral shifting of the film roll during transport.

[0069] Reference Figure 5 The dryer 43 can be a printing dryer, a hot air dryer, an infrared radiation dryer, or an ultraviolet curing machine. Thus, when the printed film roll passes through the dryer 43, the dryer 43 dries and cures the coating on the film roll, ensuring stable adhesion of the coating to the film roll. This design prevents the screen printing machine from scratching the coating on the surface of the film roll during subsequent coating printing processes, thereby ensuring the quality of multiple coating printing processes.

[0070] In this embodiment, the possibility of scratching the coating on the film roll surface is relatively small during the conveying process, so a dryer 43 is not installed after the second monochrome printing machine 41. Furthermore, the second monochrome printing machine 41 uses fast-drying coating, which allows the coating to cure quickly, enabling direct conveying without drying.

[0071] Reference Figure 5An auxiliary conveying roller group 44 is also provided on one side of the dryer 43. The dryer 43 and the auxiliary conveying roller group 44 are arranged in sequence along the conveying direction of the film roll.

[0072] Reference Figure 5 and Figure 6 In this embodiment, the auxiliary conveying roller assembly 44 includes a roller base 441, a power roller 442, and an auxiliary roller 443. The roller base 441 is arranged along the width direction of the film roll in its length direction and is connected to the dryer 43. The power roller 442 is arranged axially along the length direction of the roller base 441, and both ends of the power roller 442 are rotatably connected to the roller base 441. A power motor is coaxially connected to the power roller 442 and is installed at one end of the roller base 441. The auxiliary roller 443 is arranged parallel to the power roller 442, and both ends of the auxiliary roller 443 are connected to the roller base 441. The auxiliary roller 443 is spaced above the power roller 442, and the film roll passes through the gap between the auxiliary roller 443 and the power roller 442 along its own conveying direction.

[0073] Reference Figure 4 and Figure 6 The auxiliary roller 443 is provided with two guide limiting members 444. The structure of the guide limiting member 444 is the same as that of the limiting conveyor member 423. The two guide limiting members 444 are spaced apart along the axial direction of the auxiliary roller 443. The rubber ring 4231 inside the guide limiting member 444 abuts against the outer wall of the power roller 442, and the film roll passes between the rubber ring 4231 and the power roller 442.

[0074] Reference Figure 6 The auxiliary conveyor roller group 44, through the coordinated design of the power roller 442, auxiliary roller 443, and guide limiting member 444, is able to pull the film roll out from the dryer 43. This gives the auxiliary conveyor roller group 44 the same function as the relay conveyor roller group 42, both of which can realize the relay conveying of the film roll.

[0075] Reference Figure 5 and Figure 6 In this embodiment, tension adjusting components 445 are provided at both ends of the driven roller 422. Each tension adjusting component 445 includes an adjusting block 4451, an adjusting bolt 4452, and an adjusting nut 4453. The adjusting block 4451 is fixedly connected to one end of the driven roller 422 and is slidably connected to the roller seat 441 in the vertical direction. The adjusting bolt 4452 is vertically positioned, and its lower end is rotatably connected to the adjusting block 4451. The adjusting nut 4453 is sleeved on the outside of the corresponding adjusting bolt 4452, screwed to the corresponding adjusting bolt 4452, and fixedly connected to the roller seat 441.

[0076] By rotating the adjusting nut 4453, the adjusting bolt 4452 can be moved up and down, thereby causing the adjusting block 4451 and the auxiliary roller 443 to make fine adjustments up and down. This allows adjustment of the gap and pressure between the auxiliary roller 443 and the power roller 442 to accommodate film rolls of different thicknesses and optimize the conveying tension.

[0077] Reference Figure 1 and Figure 5 A buffer box 45 is provided between the dryer 43 and the adjacent monochrome printing machine 41, and between the second monochrome printing machine 41 and the unwinding mechanism 1. The buffer box 45 has an opening at the top and is located below the corresponding relay conveyor roller group 42 or the corresponding auxiliary conveyor roller group 44.

[0078] Based on the design of the buffer box 45, the buffer box 45 can store a section of film roll, and this section of film roll can act as a buffer to eliminate the instantaneous speed difference in the delivery of film roll between two adjacent devices.

[0079] Specifically, along the conveying direction of the film roll, when the conveying speed of the preceding device is temporarily greater than that of the following device, the film roll in the buffer box 45 between the two adjacent devices will droop into the bottom of the buffer box 45 to form a "U"-shaped buffer ring. Conversely, when the conveying speed of the following device is temporarily greater than that of the preceding device, the film roll in the buffer box 45 becomes shorter, and the film roll between the buffer boxes 45 can then be used as a buffer. In this way, the buffer box 45 can effectively absorb and compensate for speed fluctuations, playing a role in tension buffering and decoupling. This ensures that the tension of the film conveying mechanism is constant, avoiding film roll breakage or deformation due to sudden tension changes, which would affect printing quality.

[0080] Reference Figure 1 and Figure 7 The coating printing apparatus also includes an output correction mechanism 5, which is located between the last monochrome printing machine 41 and the winding mechanism 6 along the film conveying direction. In this embodiment, the output correction mechanism 5 has the same structure as the input correction mechanism 3. The output correction mechanism 5 can perform a final position correction before the film roll is wound up.

[0081] Reference Figure 1 and Figure 7 The winding mechanism 6 has a similar structure to the unwinding mechanism 1. In this embodiment, the winding mechanism 6 includes a winding frame 61, a winding roller 62 rotatably mounted on the winding frame 61, and a winding motor coaxially connected to the winding roller 62. The winding motor is connected to the winding frame 61. In this embodiment, the winding roller 62 is an air-expanding shaft.

[0082] Reference Figure 1 and Figure 7The winding frame 61 is also provided with a number of relay rollers 63, which are arranged at intervals along the conveying direction of the film roll. The film roll passes through the relay rollers 63 in sequence along its own conveying direction, and the outer side of the relay rollers 63 contacts the film roll. Reference Figure 1 and Figure 7 The take-up frame 61 is also equipped with a pressure roller group 64, and a number of relay rollers 63 are located between the pressure roller group 64 and the take-up roller 62 along the conveying direction of the film roll. In this embodiment, the pressure roller group 64 and the pressure roller group 14 have the same structure.

[0083] Reference Figure 7 The winding mechanism 6, through the coordinated design of the winding roller 62, the relay roller 63 and the pressure roller group, is able to wind up the film roll that has undergone two coating printing processes.

[0084] Reference Figure 1 and Figure 4 The coating printing apparatus also includes a guide roller mechanism 7. The guide roller mechanism 7 includes a guide roller frame with several guide rollers mounted on it. The guide rollers are axially aligned along the width of the film roll, and both ends of the guide rollers are rotatably connected to the guide roller frame. These guide rollers are spaced apart sequentially along the conveying direction of the film roll, and the film roll passes sequentially between the guide rollers along its own conveying direction. Several guide roller mechanisms 7 are provided, sequentially arranged between various devices along the conveying direction of the film roll. Thus, with the cooperation of these guide roller mechanisms 7, a smooth and stable transition of the film roll between different device units can be ensured, maintaining the correct conveying path and tension.

[0085] Reference Figure 4 and Figure 5 In this embodiment, two guide roller mechanisms 7 are provided. One guide roller mechanism 7 is located between the first buffer box 45 and the adjacent dryer 43, and is used to guide the film roll from the corresponding buffer box 45 and guide it to the corresponding dryer 43. The other guide roller mechanism 7 is located between the second buffer box 45 and the adjacent second monochrome printing machine 41. This guide roller mechanism 7 can be used to stably guide the film roll onto the second monochrome printing machine 41.

[0086] Reference Figure 5In this embodiment, a pressure plate mechanism is also provided on the guide roller mechanism 7 of the second monochrome printing machine 41. The pressure plate mechanism includes a conveyor plate, a pressure plate shaft, and a pressure plate. The conveyor plate is set on the corresponding guide roller frame, and the pressure plate shaft is rotatably connected to the corresponding guide roller frame. A handle is also provided at one end of the pressure plate shaft. The pressure plate is set outside the pressure plate shaft, and the pressure plate and the conveyor plate are spaced apart. The film roll passes through the gap between the pressure plate and the conveyor plate along its own conveying direction. Based on the design of the pressure plate mechanism, before printing, the operator can operate the handle to drive the pressure plate shaft and the pressure plate to rotate, press down the pressure plate, and flatly press the film roll onto the conveyor plate. This action can be performed after the film roll is conveyed into place to ensure that the film is completely flat and stationary at the moment of printing, eliminating the slight undulations caused by curling memory or airflow, thereby greatly improving the accuracy of the second printing.

[0087] Reference Figure 1 In this embodiment, the coating printing device also includes a central controller, which is a PLC or an industrial computer. The unwinding mechanism 1, the monochrome printing machine 41, the winding mechanism 6, the dryer 43, the corona machine 2, the feeding correction mechanism 3, and the discharging correction mechanism 5 are all electrically connected to the central controller.

[0088] In this embodiment, each monochrome printing machine 41 is equipped with two vision inspection devices. Along the conveying direction of the film roll, the screen printing machine 412 on each monochrome printing machine 41 is located between the corresponding two vision inspection devices, and the film roll passes through all the vision inspection devices in sequence. The vision inspection devices are electrically connected to the central controller. Under the action of the vision inspection devices, it is possible to detect whether the film roll is misaligned, whether the printing on the film roll is misaligned, and whether the printing quality is qualified. This facilitates timely suspension of the coating printing device in case of abnormality, preventing the continuous output of unqualified products.

[0089] The implementation principle of this application embodiment is as follows: when performing two-color coating printing, the film roll sequentially goes through unwinding, corona treatment, first correction, first coating printing, drying, second coating printing, second correction, and rewinding.

[0090] Specifically, the two-color coating printing process includes the following steps: The unwinding mechanism 1 is activated, and the unwinding motor drives the unwinding roller 12 to release the film roll. After passing through several intermediate rollers 13 and pressure roller groups 14, the film roll is smoothly fed out with constant tension. Then, the film roll enters the corona machine 2 for surface corona treatment to enhance ink adhesion. After corona treatment, the film roll is then conveyed to the feeding correction mechanism 3, where it undergoes a first-stage correction. Specifically, the automatic correction machine adjusts the position of the film roll to ensure accurate positioning. After the first correction, the film roll enters the first single-color printing machine 41, where the first printing is completed under the action of the screen printing machine 412, and is output by the corresponding relay conveyor roller group 42. After the first printing, the film roll enters the dryer 43 through the guide roller mechanism 7 to dry and cure the coating, and is then output by the auxiliary conveyor roller group 44. After drying, the film roll enters the second monochrome printing machine 41. Under the precise flattening of the pressure plate mechanism, it undergoes a second coating printing. After printing, it is output through the corresponding relay conveyor roller group 42. After the second printing, the film roll is sequentially conveyed to the output correction mechanism 5, which performs secondary correction on the film roll, achieving a final positional adjustment. After the secondary correction, the film roll is wound up by the winding mechanism 6.

[0091] Example 2: A dual-station coating printing apparatus, referring to... Figure 8 The difference between this embodiment and embodiment 1 is that it also includes a stacking frame 8, and the unwinding mechanism 1, printing mechanism 4, winding mechanism 6, dryer 43, corona machine 2 and feeding correction mechanism 3 are all installed in the stacking frame 8 and are detachably connected to the stacking frame 8.

[0092] Reference Figure 8 Both monochrome printing presses 41 are located within the stacking rack 8, with the two monochrome printing presses 41 spaced apart vertically. The dryer 43 is spaced apart from the upper monochrome printing press 41 horizontally. Furthermore, the unwinding mechanism 1 is spaced apart from the upper monochrome printing press 41 horizontally, and the rewinding mechanism 6 is spaced apart from the lower monochrome printing press 41 horizontally.

[0093] Reference Figure 8 and Figure 9 The stacking frame 8 is also equipped with a connecting roller group 46, which includes several connecting rollers 461. The connecting rollers 461 are axially arranged along the width direction of the film roll. The connecting rollers 461 are rotatably connected to the stacking frame 8 and can be detachably connected. The several connecting rollers 461 are distributed between the film roll outlet of the dryer 43 and the film roll inlet of the lower monochrome printing machine 41.

[0094] With the design of the connecting roller group 46, the film roll after the first coating printing by the upper monochrome printing press 41 and drying by the dryer 43 can be conveyed to the lower monochrome printing press 41 under the guidance of the connecting roller group 46, which enables two coating printing processes.

[0095] Reference Figure 8 and Figure 10 The stacking frame 8 is also equipped with a skip roller group 47, which includes several skip rollers 471. The skip rollers 471 are axially arranged along the width direction of the film roll. The skip rollers 471 are rotatably connected to the stacking frame 8, and the several skip rollers 471 are distributed between the film roll discharge port of the dryer 43 and the film roll inlet of the discharge correction mechanism 5.

[0096] With the design of skip roller group 47, the film roll after the first coating printing by the upper monochrome printing press 41 and drying by the dryer 43 can be directly conveyed to the discharge correction mechanism 5 under the guidance of skip roller group 47, and then wound up by the winding mechanism 6, so that coating printing can be performed only once.

[0097] Reference Figure 8 and Figure 11 The stacking frame 8 is also equipped with a changing roller group 48, which includes several changing rollers 481. The changing rollers 481 are axially arranged along the width direction of the film roll. The changing rollers 481 are rotatably connected to the stacking frame 8, and the several changing rollers 481 are distributed between the film roll outlet of the feeding correction mechanism 3 and the film roll inlet of the lower monochrome printing machine 41.

[0098] The design of the changing roller group 48 allows the film roll output from the unwinding mechanism 1 to be directly transported to the lower monochrome printing press 41 under the guidance of the changing roller group 48, so that the coating is printed on the surface of the film roll only once.

[0099] Reference Figure 10 and Figure 11 With the cooperation of the line-changing roller group 48 and the skip roller group 47, the coating printing apparatus of this application is able to form two monochrome coating printing lines that cannot work simultaneously.

[0100] Reference Figure 9 Furthermore, the coating printing apparatus of this application can also be used as a two-color coating printing line.

[0101] The implementation principle of this application embodiment is as follows: Depending on the usage requirements, the coating printing device has the following three working modes: First working mode: Two-color coating printing. (See reference) Figure 9Specifically, the film roll starts from the unwinding mechanism 1, passes through the corona machine 2 and the feeding correction mechanism 3 in sequence, enters the upper monochrome printing machine 41 for the first coating printing, then enters the dryer 43 for drying, then passes through the connecting roller group 46 and enters the lower monochrome printing machine 41 for the second coating printing, then enters the output correction mechanism 5 for correction, and finally is wound up by the winding mechanism 6.

[0102] The second working mode: printing a single-color coating on the upper layer. (See reference...) Figure 10 Specifically, the film roll starts from the unwinding mechanism 1, passes through the corona machine 2 and the feeding correction mechanism 3 in sequence, enters the upper monochrome printing machine 41 for one coating printing, then enters the dryer 43 for drying, then passes through the skip roller group 47, directly inputs the output correction mechanism 5, and is finally wound up by the winding mechanism 6.

[0103] The third working mode involves printing a single-color coating on the lower layer. (See reference...) Figure 11 Specifically, the film roll starts from the unwinding mechanism 1, passes through the corona machine 2 and the feeding correction mechanism 3 in sequence, then passes through the line changing roller group 48 and is fed into the lower single-color printing machine 41 for one coating printing, then enters the output correction mechanism 5, and is finally wound up by the winding mechanism 6.

[0104] Example 3: A dual-station coating printing apparatus, referring to... Figure 12 The difference between this embodiment and embodiment 2 is that: there are two unwinding mechanisms 1 and two winding mechanisms 6. The two unwinding mechanisms 1 and the two winding mechanisms 6 are arranged at intervals in the vertical direction, and the two unwinding mechanisms 1 are located on the same side of the monochrome printing machine 41 in the horizontal direction, and the two winding mechanisms 6 are located on the same side of the monochrome printing machine 41 in the horizontal direction.

[0105] Reference Figure 12 The upper unwinding mechanism 1, the upper monochrome printing machine 41, the dryer 43, and the upper winding mechanism 6 are arranged sequentially and at intervals along the horizontal direction to form the upper monochrome printing line. Similarly, the lower unwinding mechanism 1, the lower monochrome printing machine 41, the dryer 43, and the lower winding mechanism 6 are arranged sequentially and at intervals along the horizontal direction to form the lower monochrome printing line.

[0106] Reference Figure 12 The upper and lower monochrome printing lines are vertically spaced apart. The unwinding mechanism 1 within the upper monochrome printing line unwinds the film roll, allowing it to pass sequentially through the corresponding monochrome printing press 41 and dryer 43, before being wound up by the corresponding winding mechanism 6. This achieves upper monochrome printing. Similarly, the lower monochrome printing line achieves lower monochrome printing. Furthermore, the upper and lower monochrome printing lines can operate synchronously.

[0107] Reference Figure 12In this embodiment, a corona generator 2 and a feed correction mechanism 3 are sequentially arranged between the unwinding mechanism 1 and the corresponding monochrome printing machine 41 along the conveying direction of the film roll. A feed correction mechanism 5 is arranged between the winding mechanism 6 and the corresponding monochrome printing machine 41.

[0108] Therefore, the unwinding mechanism 1, corona machine 2, feeding correction mechanism 3, monochrome printing machine 41, discharging correction mechanism 5, and rewinding mechanism 6 can form an independent monochrome printing line, and the upper monochrome printing line and the lower monochrome printing line can work simultaneously, thereby further improving the applicability of the coating printing device of this application.

[0109] Reference Figure 12 In this embodiment, the line changing roller group 48 is located between the two unwinding mechanisms 1 in the vertical direction, and the line changing roller group 48 is located between the corresponding unwinding mechanism 1 and the corresponding monochrome printing machine 41 in the conveying direction of the corresponding upper monochrome printing line or the lower monochrome printing inner film roll.

[0110] Reference Figure 11 and Figure 13 Based on Embodiment 2, in this embodiment, the changing roller group 48 is additionally provided with several changing rollers 481, and the additional changing rollers 481 are distributed between the film roll outlet of the lower feeding and correction mechanism 3 and the film roll inlet of the upper monochrome printing machine 41.

[0111] Reference Figure 12 Similarly, in this embodiment, the skip roller group 47 is located between the two unwinding mechanisms 1 in the vertical direction, and the skip roller group 47 is located between the corresponding unwinding mechanism 1 and the corresponding monochrome printing machine 41 in the conveying direction of the corresponding upper monochrome printing line or the lower monochrome printing inner film roll.

[0112] Reference Figure 10 and Figure 14 Based on Example 2, in this example, the skip roller group 47 is provided with a plurality of skip rollers 471, and the added skip rollers 471 are distributed between the film roll outlet of the lower monochrome printing machine 41 and the film roll inlet of the upper material feeding correction mechanism 5.

[0113] Under the action of the line changing roller group 48 and the skipping roller group 47, the two unwinding mechanisms 1 can transport the film roll to any one of the monochrome printing machines 41. Similarly, the two winding mechanisms 6 can wind up the film roll output from any one of the monochrome printing machines 41, which further enhances the flexibility of the coating printing apparatus of this application.

[0114] The implementation principle of this application embodiment is as follows: With the cooperation of the connecting roller group 46, the skipping roller group 47 and the changing roller group 48, this device can realize a variety of flexible working modes, mainly including the following dual-line parallel monochrome printing mode, dual-color serial printing mode and flexible single-station monochrome printing mode, which greatly improves the applicability and production efficiency of the equipment.

[0115] Dual-line parallel monochrome printing mode: In this mode, the device is equivalent to two independent monochrome printing production lines operating simultaneously. Specifically, the upper unwinding mechanism 1 supplies material to the upper monochrome printing machine 41. After corona treatment and web correction, the film roll enters the upper monochrome printing machine 41 for printing and is then directly conveyed to the upper rewinding mechanism 6 for winding. Simultaneously, the lower unwinding mechanism 1 independently supplies material to the lower monochrome printing machine 41, and after printing, it is wound up by the lower rewinding mechanism 6. This mode can handle two different monochrome printing tasks simultaneously or double the output of the same monochrome printing task, greatly improving production efficiency.

[0116] Two-color tandem printing mode: This mode is used to complete two-color printing on the same film roll. Specifically, either unwinding mechanism 1 can be selected for unwinding. The film roll passes through the upper single-color printing press 41 for the first printing, and then enters the dryer 43 for drying. After drying, the film roll is guided downward by the connecting roller group 46 to the lower single-color printing press 41 for the second printing. The film roll that has completed two printings is finally wound up by either winding mechanism 6. This mode realizes continuous and automated two-color coating printing, and its vertically stacked compact structure effectively saves production space.

[0117] Flexible single-station monochrome printing mode: Utilizing the line-changing roller group 48 and the skip roller group 47, this device can achieve flexible combinations of feeding material from any unwinding station to any printing station and unwinding material from any printing station to any rewinding station. For example, when the lower unwinding mechanism 1 needs to feed material to the upper monochrome printing press 41, the film roll can be guided upwards through the line-changing roller group 48. Similarly, after the upper monochrome printing press 41 completes printing, its products can also be rewound by the lower rewinding mechanism 6 through a specific roller group path. This high degree of flexibility ensures that while one station is changing material or performing maintenance, another station can continue production in combination with the remaining unwinding and rewinding mechanisms, maximizing equipment utilization and reducing downtime.

[0118] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-station coating printing device, characterized in that, include: The unwinding mechanism (1), printing mechanism (4) and rewinding mechanism (6) are arranged in sequence. The unwinding mechanism (1) is used to unwind the film roll and transport it into the printing mechanism (4). The printing mechanism (4) is used to print coating on the film roll. The rewinding mechanism (6) is used to rewind the film roll after it has passed through the printing mechanism (4) and been printed with coating. The printing mechanism (4) includes a monochrome printing machine (41), and there are no fewer than two monochrome printing machines (41). The monochrome printing machines (41) are spaced apart in sequence along the conveying direction of the film roll, and the film roll passes through the monochrome printing machines (41) in sequence. A dryer (43) is provided between two adjacent monochrome printing presses (41), and the film roll passes through the dryer (43) along its own conveying direction.

2. The dual-station coating printing device according to claim 1, characterized in that, It also includes a corona machine (2), which is located between the printing mechanism (4) and the unwinding mechanism (1), and the film roll passes through the corona machine (2) in its own conveying direction.

3. The dual-station coating printing apparatus according to claim 1, characterized in that, It also includes a feeding correction mechanism (3), which is located between the printing mechanism (4) and the unwinding mechanism (1), and the film roll passes through the feeding correction mechanism (3) along its own conveying direction.

4. The dual-station coating printing apparatus according to claim 1, characterized in that, A relay conveyor roller group (42) is provided on one side of the monochrome printing machine (41), and the film roll passes through the monochrome printing machine (41) and the corresponding relay conveyor roller group (42) in sequence along its own conveying direction. The relay conveyor roller group (42) is used to convey the film roll. An auxiliary conveying roller group (44) is provided on one side of the dryer (43). The film roll passes through the dryer (43) and the corresponding auxiliary conveying roller group (44) in sequence along its own conveying direction. The auxiliary conveying roller group (44) is used to convey the film roll.

5. A dual-station coating printing apparatus according to claim 4, characterized in that, The relay conveyor roller group (42) includes an active roller (421), which is rotatably connected to the monochrome printing machine (41), and an active motor is coaxially connected to one end of the active roller (421); The relay conveyor roller group (42) also includes a driven roller (422), which is connected to the monochrome printing machine (41). The driving roller (421) is axially arranged along the width direction of the film roll. The driving roller (421) and the driven roller (422) are arranged parallel to each other and spaced apart. The film roll passes through the gap between the driving roller (421) and the driven roller (422) along its own conveying direction. Two limiting conveyors (423) are provided on the driven roller (422). The two limiting conveyors (423) are spaced apart along the axial direction of the driven roller (422). The limiting conveyors (423) abut against the outer wall of the driving roller (421), and the film roll passes between the limiting conveyors (423) and the driving roller (421).

6. A dual-station coating printing apparatus according to claim 5, characterized in that, The driven roller (422) is slidably connected to the limiting conveyor (423) along its own axial direction, and the limiting conveyor (423) is detachably connected to the driven roller (422).

7. The dual-station coating printing apparatus according to claim 1, characterized in that, It also includes a stacking rack (8), in which the monochrome printing machine (41) is set. Two monochrome printing machines (41) are set, and the two monochrome printing machines (41) are set at intervals in the vertical direction. The dryer (43) is located inside the stacking rack (8), and the dryer (43) and the upper monochrome printing machine (41) are spaced apart in the horizontal direction; The stacking frame (8) is also provided with a connecting roller group (46), which is located between the dryer (43) and the lower monochrome printing machine (41). The connecting roller group (46) is used to guide the film roll output by the dryer (43) into the lower monochrome printing machine (41).

8. A dual-station coating printing apparatus according to claim 7, characterized in that, The stacking frame (8) is also provided with a skip roller group (47), which is located between the dryer (43) and the winding mechanism (6). The skip roller group (47) can guide the film roll output by the dryer (43) into the winding mechanism (6).

9. A dual-station coating printing apparatus according to claim 7, characterized in that, The number of the unwinding mechanism (1) and the winding mechanism (6) are both two. The two unwinding mechanisms (1) are located on the same side of the monochrome printing machine (41), and the two winding mechanisms (6) are located on the same side of the monochrome printing machine (41). The unwinding mechanism (1) can unwind the film roll and convey it to any of the monochrome printing presses (41), and the rewinding mechanism (6) can rewind the film roll that has passed through any of the monochrome printing presses (41).

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