Circulating laser printing system
The recyclable laser printing system enables the efficient recycling of laser embossed film, solving the problems of material waste and high costs in traditional laser printing, and improving production efficiency and economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN JOINT SUCCESS PACKAGE TECH CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-21
AI Technical Summary
In existing laser printing processes, laser embossed film must be unwound and rewound in whole rolls for reuse, resulting in material waste and increased production costs.
Design a recyclable laser printing system, including a printing device and a recycling device. The recycling device returns the used laser embossing film back to the first printing roller group, thereby achieving efficient recycling of the laser embossing film.
It significantly improves the utilization rate of laser embossing film, reduces material consumption and production costs, while ensuring the stability of printing quality and production efficiency.
Smart Images
Figure CN224528263U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printing technology, and in particular to a circulating laser printing system. Background Technology
[0002] In existing laser printing processes, laser embossed film is typically used as the transfer medium, and the laser pattern is transferred through processes such as pressing, curing, and peeling. However, traditional processes have significant technical drawbacks. For example, the laser film must be unwound and rewound completely before it can be recycled, which not only wastes materials but also increases production costs. Therefore, there is an urgent need to develop a printing system that enables the efficient recycling of laser embossed film to solve the key problems in existing technologies. Utility Model Content
[0003] Based on this, this application provides a recyclable laser printing system that can effectively improve the utilization rate of laser embossing film.
[0004] A circulating laser printing system includes a printing device and a circulating device; the printing device includes a material input unit, an ink unit, a first printing roller group, a curing unit, a peeling unit, and an output unit; the material input unit is used to feed the substrate into the first printing roller group.
[0005] The ink unit and the first printing roller group hold the substrate, and the ink unit is used to apply the material to be cured onto the substrate; the circulation device is used to transfer the laser embossing film to the first printing roller group so that the laser embossing film adheres to the substrate.
[0006] The first printing roller assembly transfers the substrate to the peeling unit; the curing unit is located between the substrate and the peeling unit to cure the material to be cured on the substrate; the output unit and the circulation device are located on opposite sides of the peeling unit, the peeling unit is used to separate the laminated and cured substrate and the laser embossing film to obtain the target substrate and the circulating embossing film, the peeling unit transfers the target substrate to the output unit and the circulating embossing film to the circulation device; the circulation device can transfer the circulating embossing film back to the first printing roller assembly to be laminated with the new substrate as the laser embossing film.
[0007] The above-described circulating laser printing system consists of a printing unit and a circulation unit, achieving efficient recycling of the laser embossing film. The printing unit includes a material input unit, an ink unit, a first printing roller group, a curing unit, a peeling unit, and an output unit, forming a complete printing processing chain. The material input unit transports the substrate to the first printing roller group, while the ink unit precisely coats or prints the material to be cured onto the substrate. Simultaneously, the circulation unit transports the laser embossing film to the first printing roller group, where it is pressed against the substrate to transfer the pattern. The pressed film then undergoes curing in the curing unit and enters the peeling unit to separate the substrate from the embossing film. The target substrate enters the output unit as a finished product, while the separated embossing film returns to the circulation unit, is processed, and then re-transported to the first printing roller group for reuse. By establishing a closed-loop embossing film circulation path, the transfer quality of the laser pattern is ensured, material consumption is significantly reduced, and the utilization rate of the laser embossing film is effectively improved.
[0008] In one embodiment, the circulation device includes a circulation input roller group, a film storage unit, and a circulation output roller group for sequentially transferring the circulation embossed film, wherein the circulation output roller group is used to transfer the circulation embossed film to the first printing roller group.
[0009] In one embodiment, the circulation device further includes an antistatic unit disposed between the circulating embossed film and the path from the circulating input roller group to the film storage unit.
[0010] In one embodiment, the film storage unit includes two rows of guide rollers spaced apart, each of the guide roller groups having a plurality of small guide rollers, the circulating embossed film from the circulating input roller group alternately and progressively passing around each of the small guide rollers in the two rows of guide roller groups to reach the circulating output roller group.
[0011] In one embodiment, the two rows of guide roller groups are spaced 1.5m to 2m apart, the spacing between adjacent small guide rollers in any row of guide roller groups is 0.5cm, the diameter of the small guide rollers is 1.5cm, and the length of the circulating embossed film located between the circulating input roller group and the circulating output roller group is between 150m and 200m.
[0012] In one embodiment, a movable floating roller is provided between the peeling unit and the circulating input roller group, the floating roller being used to control the tension of the circulating embossed film.
[0013] In one embodiment, the circulating output roller group includes a first output guide roller and a second output guide roller, and the circulating embossed film from the film storage unit passes sequentially through the first output guide roller and the second output guide roller and arrives at the first printing roller group.
[0014] In one embodiment, the circulation device further includes a replacement assembly located on the side of the circulation output roller group away from the film storage unit. The replacement assembly includes a take-up roller and a release roller. The take-up roller is used to collect the circulating embossed film from the first output guide roller. The release roller stores new laser embossed film and is used to transfer the new laser embossed film to the second output guide roller.
[0015] In one embodiment, a film-attaching platform and a pressing strip are provided between the first output guide roller and the second output guide roller, the film-attaching platform and the pressing strip being used to press the cyclic embossed film located between the first output guide roller and the second output guide roller.
[0016] In one embodiment, the printing device and the recycling device are detachably connected by a connecting device;
[0017] Alternatively, the printing device and the circulation device can be movably connected by a connecting device. Attached Figure Description
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0019] Figure 1 This is a schematic diagram of the structure of a cyclic laser printing system according to one embodiment.
[0020] Reference numerals: 10. Circulating laser printing system; 11. Substrate; 12. Laser embossing film; 21. Material input unit; 22. Ink unit; 221. Printing plate roller; 222. Ink transfer anilox roller; 223. Ink trough; 23. First printing roller group; 231. Printing roller; 232. Composite pressure roller; 24. Curing unit; 25. Peeling unit; 26. Output unit; 27. Main frame; 28. First guide roller; 31. Circulating input roller group; 32. Film storage unit; 321. Guide roller group; 321. Small guide roller; 331. First output guide roller; 332. Second output guide roller; 333. Film splicing platform; 334. Pressing strip; 34. Static elimination unit; 351. Film take-up roller; 352. Film release roller; 353. Roller frame; 354. Second guide roller; 36. Frame; 40. Floating roller; 50. Connecting device. Detailed Implementation
[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0022] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.
[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0024] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0025] Laser-printed embossed film is a low-surface-tension OPP (oriented polypropylene) transparent laser film with micro-nano laser images embossed on its embossed surface. In existing laser printing processes, OPP transparent laser embossed film is typically used as the transfer medium, and the laser pattern is transferred through processes such as pressing, curing, and peeling. However, traditional processes have significant technical drawbacks. For example, OPP laser film must be unwound and rewound completely before it can be recycled, which not only wastes materials but also increases production costs. Therefore, there is an urgent need to develop a printing system that enables efficient recycling of laser embossed film to solve the key problems in existing technologies.
[0026] See Figure 1To address the aforementioned problems, this application provides a circulating laser printing system 10, comprising a printing device and a circulation device. The printing device includes a material input unit 21, an ink unit 22, a first printing roller group 23, a curing unit 24, a peeling unit 25, and an output unit 26. The material input unit 21 is used to feed the substrate 11 into the first printing roller group 23. The ink unit 22 and the first printing roller group 23 hold the substrate 11, and the ink unit 22 is used to coat the substrate 11 with the material to be cured. The circulation device is used to transfer the laser embossing film 12 to the first printing roller group 23 so that the laser embossing film 12 adheres to the substrate 11. The first printing roller group 23 feeds the substrate 11... 1. The substrate 11 is transferred to the peeling unit 25; the curing unit 24 is located between the first printing roller group 23 and the peeling unit 25 to cure the material to be cured on the substrate 11; the output unit 26 and the circulation device are located on both sides of the peeling unit 25 respectively. The peeling unit 25 is used to separate the laminated and cured substrate 11 and the laser embossing film 12 to obtain the target substrate 11 and the circulating embossing film. The peeling unit 25 transfers the target substrate 11 to the output unit 26 and transfers the circulating embossing film to the circulation device; the circulation device can transfer the circulating embossing film back to the first printing roller group 23 so that the laser embossing film 12 can be re-laminated with the new substrate 11.
[0027] The recirculating laser printing system 10 provided in this application can be applied to packaging printing, labeling and anti-counterfeiting, decoration and special materials, etc., and can produce laser-printed products to improve product grade and performance. The recirculating laser printing system 10 includes a printing device and a recycling device. The printing device, as the core processing unit of the system, is responsible for completing the pattern transfer work on the substrate. The printing device adopts a modular design, containing complete process flow modules to ensure the stability and consistency of printing quality. The recycling device is a key technological highlight of this system, enabling the efficient recycling of the laser embossing film 12. As shown in the figure, the dotted line is a schematic diagram of the frame 36 of the recycling device. The frame 36 of the recycling device is connected to the main frame 27 of the printing unit through a connecting device 50. The connecting device 50 can be fixed or movable, making it very convenient and flexible in use. The recycling device, through a precise transmission and control mechanism, ensures that the embossing film maintains stable tension and positional accuracy during multiple uses. When the recirculating laser printing system 10 is in operation, the printing unit first processes the substrate, transferring the laser pattern onto the substrate surface through precise coating, printing, and pressing processes. Simultaneously, the recycling unit continuously provides reusable laser embossing film 12 to the printing process, and after the transfer is complete, it is recycled, cleaned, and adjusted before being reused in the printing process. The recirculating laser printing system 10 provided in this application employs a recycling design, significantly reducing material consumption. The printing unit and recycling unit work together to improve production efficiency. The recirculating laser printing system 10 can be used for high-end packaging printing, anti-counterfeiting label production, special decorative materials, and other printed materials requiring laser effects.
[0028] Furthermore, in this embodiment, the printing apparatus includes a material input unit 21, an ink unit 22, a first printing roller group 23, a curing unit 24, a peeling unit 25, and an output unit 26. The material input unit 21 serves as the starting point of the printing process and can employ an automatic unwinding mechanism equipped with a high-precision tension control system. The main function of the material input unit 21 is to smoothly and uniformly transport the rolled substrate 11 to the first printing roller group 23, ensuring the stability of the subsequent printing process. The unit has a built-in correction device that can adjust the film position in real time to prevent deviation. It should be noted that the film material mentioned in this application refers to all film materials used in the circulating laser printing system 10, including the laser embossed film 12 and the substrate 11. The ink unit 22 employs a precision metering system and includes core components such as a doctor blade and anilox roller. Specifically, the ink unit 22 includes a printing plate roller 221, an anilox roller 222, and an ink trough 223, which can hold UV (ultraviolet) varnish or ink. The function of the ink unit 22 is to uniformly coat the UV (ultraviolet) curable ink onto the surface of the substrate 11. The ink unit 22 can adjust the ink thickness according to different printing needs to ensure the clarity and color saturation of the pattern transfer. During the coating process, the ink unit 22 works in conjunction with the first printing roller group 23 to form a stable clamping force, ensuring that the substrate 11 passes through smoothly. The first printing roller group 23, as the core pressure mechanism of the printing process, can be composed of a high-hardness steel roller and an elastic pressure roller. The first printing roller group 23 can provide stable conveying power to the substrate 11, precisely pressing the ink-coated or printed substrate 11 against the laser embossing film 12 conveyed by the circulation device, ensuring a uniform pressure distribution between the two materials and achieving high-quality pattern transfer. The curing unit 24 employs a UV (ultraviolet) curing system equipped with multiple sets of LED (light-emitting diode) curing lamps. When the composite film material with the pattern transferred passes through this unit, the UV (ultraviolet) light source penetrates the laser embossing film and instantly cures the ink layer, permanently fixing the laser pattern onto the substrate 11. The curing process is fast and uniform, without causing thermal damage to the film material. A first guide roller 28 is located between the curing unit 24 and the peeling unit 25, serving both guiding and load-bearing functions. The peeling unit 25 can employ an angle-adjustable peeling mechanism, its core function being to separate the cured composite material into two parts: the printed target substrate 11, which is then conveyed to the output unit 26; and the used laser embossing film 12, which is returned to the recycling device for reuse. The peeling process is smooth and precise, ensuring no damage to the film surface. The output unit 26 is responsible for the winding and sorting of the finished product, including tension control, cooling, and automatic roll changing functions. This unit ensures that the finished printed material rolls are neat and tightly packed, facilitating subsequent processing or transportation. All units of the printing unit work collaboratively through an intelligent control system to achieve continuous production from raw materials to finished products. The printing unit operates stably and reliably, and can meet the laser printing needs of different precision requirements.
[0029] Furthermore, the first printing roller assembly 23 transfers the substrate 11 to the peeling unit 25. The curing unit 24 is located between the substrate 11 and the peeling unit 25 to cure the material to be cured on the substrate 11. Specifically, after completing pattern pressing, the first printing roller assembly 23 smoothly conveys the substrate 11, carrying uncured ink, to the peeling unit 25. Along the transport path, the curing unit 24 can precisely irradiate the moving substrate 11. When the substrate 11 passes through the curing area, the UV (ultraviolet) ink can rapidly undergo a photocuring reaction under the action of a specific wavelength light source, permanently fixing the transferred laser pattern to the surface of the substrate 11. This curing process is instantaneous, ensuring production efficiency while avoiding material deformation problems that may occur with traditional thermal curing.
[0030] Furthermore, the output unit 26 and the circulation device are located on both sides of the peeling unit 25. The peeling unit 25 is used to separate the laminated and cured substrate 11 and the laser embossing film 12 to obtain the target substrate 11 and the circulating embossing film. The peeling unit 25 transfers the target substrate 11 to the output unit 26 and the circulating embossing film to the circulation device. The circulation device can transfer the circulating embossing film back to the first printing roller group 23 so that the laser embossing film 12 can be re-laminated with the new substrate 11. Specifically, the peeling unit 25 adopts a modular design, with the output unit 26 and the circulation device connected to its left and right sides respectively, forming a highly efficient diversion system. When the fully cured composite material reaches the peeling unit 25, the precisely designed separation mechanism will smoothly peel off the two layers of film: the upper layer is the target substrate 11 (the finished product that has been printed), which is guided to the output unit 26 for automatic winding; the lower layer is the circulating embossing film (laser template), which is transported to the circulation device for regeneration. After receiving the embossed film returned from the peeling unit 25, the recycling device cleans and tidies it as necessary, then sends it back to the first printing roller group 23 via a precisely controlled conveyor system. The system automatically detects the integrity of the embossed film, performs necessary cleaning on the film surface, adjusts the tension to the optimal working state, and the regenerated embossed film is pressed again with the newly input substrate 11 to begin a new printing cycle. This design significantly reduces material consumption while ensuring the stability of printing quality. The recycling design not only improves production efficiency but also embodies the concept of green manufacturing through the reuse of materials, increasing the utilization rate of the laser embossed film 12 and bringing significant economic and environmental benefits to users.
[0031] In some embodiments, the circulation device includes a circulation input roller group 31, a film storage unit 32, and a circulation output roller group for sequentially conveying the embossed film. As the starting unit of the circulation device, the circulation input roller group 31 receives the used laser embossed film 12 separated from the peeling unit 25. This roller group employs a precision transmission design and is equipped with an intelligent tension control system to ensure that the embossed film maintains a flat and stable conveying state when entering the circulation system. The roller group surface undergoes special treatment to effectively reduce film friction and prevent scratches on the laser texture. The film storage unit 32 is a key buffer component of the circulation device, providing temporary storage space for the used embossed film, balancing the production cycle differences between the preceding and following processes, and eliminating tension variations caused by process fluctuations. The film storage unit 32 adopts a double-row guide roller serpentine film-feeding design, achieving flexible storage of the film material through multi-stage guide roller arrangement, ensuring that the embossed film does not develop creases or deformation during temporary storage. The circulating output roller group is used to transfer the embossed film to the first printing roller group 23, and then precisely delivers the temporarily stored embossed film back to the first printing roller group 23. High-precision servo drives can be used to ensure that the film feeding speed is strictly synchronized with the printing device. An online cleaning device is equipped to automatically clean the film surface before output, and an integrated tension detection system adjusts the output status in real time. In one embodiment, the entire workflow of the circulation device is as follows: the used embossed film is smoothly introduced into the system via the circulating input roller group 31; further, the film enters the film storage unit 32 for buffering and temporary storage; further, the processed embossed film is precisely output by the circulating output roller group; and further, the regenerated embossed film is reused in the printing process. The perfect coordination between the circulation device and the printing device not only significantly reduces production costs but also ensures the long-term stability of printing quality through stable tension control and synchronous delivery.
[0032] In the laser printing process, static electricity elimination is crucial because static electricity can cause the film material to attract dust and impurities from the air, affecting print quality. Static electricity accumulation can interfere with the normal operation of the equipment, and electrostatic discharge can damage the delicate laser pattern. Static electricity can also cause the film material to stick together, affecting the operation of the film storage unit 32. To avoid these situations, the circulation device also includes a static electricity elimination unit 34. The static electricity elimination unit 34 is used to eliminate the static electricity generated by the laser embossing film 12 during circulation, ensuring print quality and production efficiency. Specifically, the static electricity elimination unit 34 is located between the circulating embossing film and the path from the circulating input roller group 31 to the film storage unit 32. Since the OPP (oriented polypropylene) transparent laser embossing film is prone to generating static electricity during operation, static electricity can cause uneven stress on the embossing film, mutual repulsion or adhesion, and thus cause the embossing film to shift and wrinkle. After static electricity is eliminated, these faults are effectively controlled, thereby ensuring smooth operation of the embossing film and ensuring production effect and product quality. Timely elimination of static electricity before the embossing film enters the temporary storage avoids the impact of static electricity on the stacking of film material in the film storage unit 32, creating good working conditions for subsequent processes. In one embodiment, the static eliminator 34 employs multiple static elimination technologies, generating a large number of positive and negative ions by ionizing air to neutralize the static charge on the film surface. The static eliminator intensity is automatically adjusted according to the film's running speed and environmental conditions, ensuring a uniform static eliminator effect across the entire width of the film. The static eliminator 34 is integrated with other components of the circulation system and works synchronously with the circulation input roller group 31 to ensure continuous processing. The processed film smoothly enters the film storage unit 32. The system control unit uniformly monitors the static eliminator status and links with the overall machine alarm system to ensure safe production. The innovative design of the static eliminator 34 effectively solves the static electricity problem in laser printing, providing a reliable guarantee for high-quality printing and is one of the key links in ensuring the stable operation of the circulating laser printing system 10. Through continuous and stable static eliminator treatment, not only is the product yield improved, but the service life of the embossed film is also extended.
[0033] Furthermore, in this embodiment, the film storage unit 32 includes two rows of guide roller groups 321 spaced apart, providing efficient buffer storage space for the circulating embossed film and ensuring the continuity and stability of the production process. Each guide roller group 321 is provided with multiple small guide rollers 3211. The circulating embossed film from the circulating input roller group 31 alternately and gradually bypasses each small guide roller 3211 in the two rows of guide roller groups 321 to reach the circulating output roller group. Specifically, the film path is that after the circulating embossed film enters from the circulating input roller group 31, it alternately and gradually bypasses the two rows of guide roller groups 321. The film material first bypasses a certain guide roller in the first row, and then turns to the adjacent guide roller in the second row. This alternation is repeated to form a regular S-shaped film path, which is beneficial to improving space utilization and providing sufficient film storage length. Specifically, the membrane material follows a serpentine path, sequentially passing over each small guide roller 3211. It first passes the upper guide roller of the first row of guide rollers 321, then turns to the corresponding guide roller of the second row of guide rollers 321, alternating gradually to form a regular, wave-like transmission path, ultimately smoothly transitioning to the circulating output roller group. This alternating, gradual design brings significant operational advantages, naturally creating a tension buffer zone, absorbing system vibration, evenly distributing the stress on the membrane material, avoiding localized stress concentration, providing ample opportunity for heat dissipation from the membrane surface, and allowing the membrane material to achieve appropriate stretching during travel. In one embodiment, a special surface treatment of the guide rollers ensures smooth membrane sliding and avoids scratches. The alternating membrane path naturally creates a tension buffer, reducing sudden tension changes; the compact design provides a large membrane storage capacity within a limited space; and the optimized path angle prevents creases or deformation of the membrane material.
[0034] Furthermore, in some embodiments, the interval between the two rows of guide roller groups 321 is 1.5m to 2m, and the distance between adjacent small guide rollers 3211 in any row of guide roller groups 321 is 0.5cm, with a diameter of 1.5cm. The design of double-row parallel guide roller groups 321 maintains a reasonable working distance between the two rows, improving space utilization while ensuring ease of operation and maintenance. The arrangement of the guide roller groups 321 ensures that the film material maintains a relatively ideal routing angle during transport. The length of the circulating embossed film located between the circulating input roller group 31 and the circulating output roller group is between 150m and 200m, for example, 160m, 170m, or 180m. The scientifically designed film material buffer length provides a reliable guarantee for high-quality continuous production, ensuring production efficiency while reducing quality risks caused by speed fluctuations.
[0035] In some embodiments, a movable floating roller 40 is provided between the peeling unit 25 and the circulating input roller group 31. The floating roller 40 can control the tension of the OPP (oriented polypropylene) transparent laser embossing film, ensuring smooth operation of the embossing film and preventing wrinkling. The floating roller 40 can be equipped with a high-precision linear guide system to achieve smooth displacement. Specifically, the floating roller 40 can adopt a composite adjustment mechanism combining counterweights and pneumatics, integrate a position sensor to provide real-time feedback on the roller's status, and undergo special surface treatment to ensure an ideal coefficient of friction with the film material. The floating roller 40 is used to control the tension of the circulating embossing film, for example, automatically compensating for tension fluctuations caused by speed changes, buffering impact tension changes during system start-up and shutdown, balancing tension differences between preceding and following processes, and absorbing the elastic deformation of the film material itself.
[0036] In some embodiments, the circulating output roller group includes a first output guide roller 331 and a second output guide roller 332. The circulating embossed film from the film storage unit 32 passes sequentially through the first output guide roller 331 and the second output guide roller 332, and reaches the first printing roller group 23. The embossed film is first drawn out from the film storage unit 32, bypasses the first output guide roller 331 at a specific wrap angle, enters the second output guide roller 332 after being turned, and is finally delivered to the first printing roller group 23 at a precise angle. The path design ensures uniform tension distribution of the film material. The dual guide roller output design, through mechanical structure settings, ensures a smooth transition of the circulating embossed film from the storage state to the working state. It is an important technical guarantee for maintaining the efficient operation of the circulating laser printing system 10 and ensuring printing quality. Its innovative layout not only meets the requirements of process precision but also fully considers the convenience of equipment maintenance.
[0037] Furthermore, in this embodiment, the recycling device also includes a replacement component, which enables seamless switching between the old and new laser embossed films 12, ensuring the continuity and flexibility of the production process. The replacement component includes a take-up roller 351 and a release roller 352, which are placed on a roller frame 353, providing support. A second guide roller 354 is provided between the first output guide roller 331 and the take-up roller 351, and between the release roller 352 and the second output guide roller 332, providing both guidance and support. The take-up roller 351 is used to collect the circulating embossed film from the first output guide roller 331. The release roller 352 stores new laser embossed film 12 and is used to transfer the new laser embossed film 12 to the second output guide roller 332. For example, when the system detects that the embossed film needs to be replaced, the replacement program is automatically started. The take-up roller 351 simultaneously winds up the old film to maintain stable system tension, while the release roller 352 simultaneously releases the new film roll to ensure uninterrupted film supply. The old and new film materials are automatically spliced on the dedicated splicing platform 333, and the new film material after switching is smoothly introduced into the printing stage through the guide roller system. Unlike traditional printing equipment that requires stopping the machine to change the film, the replacement component, through an automatic switching system, ensures both production continuity and process stability.
[0038] In some embodiments, a film-receiving platform 333 and a pressing strip 334 are provided between the first output guide roller 331 and the second output guide roller 332. Both the film-receiving platform 333 and the pressing strip 334 can be used during film replacement to facilitate pressing the upper and lower embossed films. Adhesive tape is used to bond the films at both ends together at the seam, thus facilitating the replacement of old and new films. The operation is convenient and practical. After the new film is replaced, it forms a closed-loop state, allowing for continuous embossing. In one embodiment, the film-receiving platform 333 can employ high-precision planar processing technology to ensure the flatness of the platform surface. The platform width is optimized to perfectly match the width of the film material. The surface of the film-receiving platform 333 is treated to ensure friction while avoiding damage to the film surface. The pressing strip 334 can be pneumatically driven, making the pressure of the pressing strip 334 uniform and adjustable. The strip structure runs through the entire width of the film material. When the system performs film replacement, the film-receiving platform 333 automatically rises to the working position, and the ends of the old and new film materials are precisely conveyed to the designated area on the platform. The pressing strip 334 presses down to fix the position of the film material, and automatically resets after the film splicing operation is completed.
[0039] In some embodiments, the printing unit and the circulation unit are detachably connected via a connecting device 50. Specifically, the frame 36 of the circulation unit is connected to the main frame 27 of the printing unit via the connecting device 50. In one embodiment, the connecting device 50 is fixed; in another embodiment, it is movable. The connecting device 50 may employ a positioning mechanism to ensure accurate module docking and be equipped with a quick-locking device for a secure connection. In some embodiments, the printing unit and the circulation unit are movably connected via the connecting device 50 to allow for positional changes between the printing unit and the circulation unit.
[0040] In the circulating laser printing system 10 provided in this application, the first printing roller group 23 includes a printing roller 231 and a composite pressure roller 232. The substrate 11 enters the printing device through the material input unit 21 and is bonded to the printing roller 231. After the substrate 11 is printed or coated with UV varnish or ink by the printing device, it is tightly bonded to the micro-nano graphic embossed surface of the laser embossed film 12 (e.g., OPP transparent laser embossed film 12) from the inline laser printing embossing film circulation device by the composite pressure roller 232. Then, it is penetrated and cured by the curing unit 24, and then passed through the first... From the guide roller 28 to the peeling unit 25, the laser embossing film 12, which is attached to the substrate, peels off from the substrate 11. The peeled substrate 11 enters the next unit of the roll-to-roll printing equipment via the output unit 26, while the peeled laser embossing film 12 enters the circulation device of the circulating laser printing system 10 via the tension control floating roller 40 and the circulation input roller group 31. An anti-static unit 34 is provided here because the laser embossing film 12 is prone to generating static electricity during its operation. Static electricity can easily cause uneven stress on the embossing film, unstable film feeding, deviation, wrinkling, etc. To address this issue, an antistatic unit 34 was installed along the travel path of the laser embossed film 12, ensuring smooth and stable operation. Small guide rollers 3211 are arranged vertically, with a distance between them ranging from 1.5m to 2m as needed. The diameter of each small guide roller 3211 is 1.5cm, and the horizontal distance between them is 0.5cm. This arrangement of upper and lower guide rollers 3211 ensures that the material storage length from the circulating input roller group 31 to the first output guide roller 331 is approximately 150 to 200m. The laser embossed film 12... The laser embossing film enters the printing device via the first output guide roller 331 and the second output guide roller 332. The composite pressure roller 232 then bonds the embossing film to the substrate printed with UV (ultraviolet) varnish or ink, thus completing a cycle of the laser embossing film 12. This process can be repeated continuously and theoretically can be repeated indefinitely. However, in practice, it depends on the wear of the micro-nano graphic embossing surface of the laser embossing film 12. When the embossing effect weakens beyond the quality requirements, a new embossing film needs to be replaced and the old film recycled. This can improve the utilization rate of the laser embossing film and effectively save costs.
[0041] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A cyclic laser printing system, characterized in that, It includes a printing device and a circulation device; the printing device includes a material input unit, an ink unit, a first printing roller group, a curing unit, a peeling unit, and an output unit; the material input unit is used to feed the substrate into the first printing roller group. The ink unit and the first printing roller assembly hold the substrate, and the ink unit is used to apply the material to be cured onto the substrate. The circulation device is used to transfer the laser embossed film to the first printing roller group so that the laser embossed film adheres to the substrate. The first printing roller group transfers the printing substrate to the stripping unit; The curing unit is located between the substrate and the first printing roller group and the peeling unit to cure the material to be cured on the substrate; the output unit and the circulation device are located on both sides of the peeling unit. The peeling unit is used to separate the laminated and cured substrate and the laser embossing film to obtain the target substrate and the circulating embossing film. The peeling unit transfers the target substrate to the output unit and the circulating embossing film to the circulation device. The recycling device can transfer the recycled embossed film back to the first printing roller group so that the laser embossed film can be re-bonded to the new printing substrate.
2. The circulating laser printing system according to claim 1, characterized in that, The circulation device includes a circulation input roller group, a film storage unit, and a circulation output roller group for sequentially transferring the embossed film. The circulation output roller group is used to transfer the embossed film to the first printing roller group.
3. The circulating laser printing system according to claim 2, characterized in that, The circulation device further includes an antistatic unit, which is located between the circulating embossed film and the circulation input roller group and the film storage unit.
4. The circulating laser printing system according to claim 2, characterized in that, The film storage unit includes two rows of guide roller groups spaced apart, each of which has multiple small guide rollers. The circulating embossed film from the circulating input roller group alternately and progressively passes around each of the small guide rollers in the two rows of guide roller groups to reach the circulating output roller group.
5. The circulating laser printing system according to claim 4, characterized in that, The two rows of guide roller groups are spaced 1.5m to 2m apart. The spacing between adjacent small guide rollers in any row of guide roller groups is 0.5cm. The diameter of the small guide rollers is 1.5cm. The length of the circulating embossed film located between the circulating input roller group and the circulating output roller group is between 150m and 200m.
6. The circulating laser printing system according to claim 2, characterized in that, A movable floating roller is provided between the peeling unit and the circulating input roller group, and the floating roller is used to control the tension of the circulating embossed film.
7. The circulating laser printing system according to claim 2, characterized in that, The circulating output roller group includes a first output guide roller and a second output guide roller. The circulating embossed film from the film storage unit passes through the first output guide roller and the second output guide roller in sequence and arrives at the first printing roller group.
8. The circulating laser printing system according to claim 7, characterized in that, The circulation device further includes a replacement component located on the side of the circulation output roller group away from the film storage unit. The replacement component includes a take-up roller and a release roller. The take-up roller is used to collect the circulation embossed film from the first output guide roller. The release roller stores new laser embossed film and is used to transfer the new laser embossed film to the second output guide roller.
9. The circulating laser printing system according to claim 8, characterized in that, A film-coating platform and a pressing strip are provided between the first output guide roller and the second output guide roller. The film-coating platform and the pressing strip are used to press the cyclic embossed film located between the first output guide roller and the second output guide roller.
10. The cyclic laser printing system according to claim 1, characterized in that, The printing device and the circulation device are detachably connected by a connecting device; Alternatively, the printing device and the circulation device can be movably connected by a connecting device.