Plastic intaglio printing equipment integrated with UV code spraying function

Abstract

The utility model relates to plastic intaglio printing equipment integrated with a UV code spraying function, and relates to the related technical field of plastic printing. The printing device comprises a rack, a discharging roller, a winding unit, a printing mechanism, a floating adjusting roller, a UV lamp curing box and a control box body. The printing mechanism comprises an intaglio printing mechanism and a UV code spraying printing mechanism. According to the plastic intaglio printing equipment integrated with the UV code spraying function, after being discharged from the discharging roller, a plastic film enters the printing mechanism to be printed after tension is adjusted through the floating adjusting roller, after intaglio printing and UV code spraying printing are conducted, a coating is cured through the UV lamp curing box, and finally winding is conducted through the winding unit. Therefore, the equipment not only improves the printing efficiency, but also can effectively control the tension change of the plastic film during rolling, and reduces the rolling phenomenon, thereby improving the quality of the finished plastic film.

Description

Technical Field

[0001] This application relates to the technical field of plastic printing, and in particular to a plastic gravure printing device with integrated UV coding function. Background Technology

[0002] In the plastic gravure printing industry, traditional printing equipment primarily relies on gravure printing technology to print patterns and text. However, with the continuous development of the market, there is an increasing demand for adding inkjet printing information directly to printed materials. This includes not only common information such as production batches and dates, but also more complex markings and anti-counterfeiting features. To meet these needs, gravure printing equipment integrating inkjet printing functionality has been developed. This equipment can not only perform high-precision gravure printing, but also directly inkjet print relevant information onto printed materials.

[0003] The related invention, with publication number CN109334238A, relates to the field of printing equipment technology, and particularly to a gravure inkjet digital printing machine. It includes a control system and an unwinding device, a printing device, a curing device, and a rewinding device connected to the control system. The printing device includes a gravure printing mechanism and an inkjet digital printing mechanism. The inkjet digital printing mechanism includes an encoder, a photoelectric sensor, a printhead control board, an ink supply system, and a printhead system. The printhead system includes a printhead bracket, a printhead housing, a UV printhead, a printhead lifting cylinder, a two-stage constant temperature heating ink cartridge, an ink pump, a negative pressure pump, an air pump cleaning pump, and an ink path anti-bubble one-way valve. The curing device is an LED UV curing lamp. When the gravure printing plate needs to be modified after gravure printing, the gravure inkjet digital printing machine of this invention eliminates the need for re-making a printing plate; the modification can be performed directly on the inkjet digital printing mechanism, reducing printing costs and improving printing efficiency.

[0004] However, there are some problems with the integrated UV coding function in plastic gravure printing equipment mentioned above. First, UV coding equipment is often independently installed at the end of the printing production line, resulting in a relatively dispersed equipment layout and increasing the complexity of installation and maintenance. Second, plastic film is easily affected by tension fluctuations during the secondary unwinding and rewinding process. This not only causes film deformation but also directly affects the positioning accuracy of the coding, resulting in blurred markings or positional deviations, thus affecting the consistency and quality stability of the final product. Utility Model Content

[0005] To address the inherent design limitations of current plastic gravure printing equipment with integrated UV coding functionality, the inventors have found that UV coding devices are often independently located at the end of the printing production line, resulting in a dispersed equipment layout and increased complexity in installation and maintenance. Furthermore, plastic films are susceptible to tension fluctuations during secondary unwinding and rewinding, which not only causes film deformation but also directly affects the positioning accuracy of the coding, leading to blurred markings or positional misalignments. This application provides a plastic gravure printing equipment with integrated UV coding functionality.

[0006] The plastic gravure printing equipment with integrated UV inkjet printing function provided in this application adopts the following technical solution: including a frame, a feeding roller disposed at one end of the frame, a winding unit disposed at the other end of the frame, a printing mechanism disposed relative to the winding unit, floating adjustment rollers disposed on both sides of the printing mechanism, a UV lamp curing box fixedly disposed at one end of the frame relative to the winding unit, and a control box body fixedly disposed on one side of the frame.

[0007] The printing mechanism includes a gravure printing mechanism and a UV inkjet printing mechanism.

[0008] By adopting the above technical solution, after the plastic film exits from the unloading roller, its tension is adjusted by the floating adjustment roller before entering the printing mechanism for printing. After gravure printing and UV inkjet printing, the coating is cured in a UV lamp curing box, and finally, it is wound up by the winding unit. In this way, the equipment not only improves printing efficiency but also effectively controls the tension changes of the plastic film during winding, reducing tangling and thus improving the quality of the finished plastic film.

[0009] As a preferred embodiment, the winding unit includes a winding roller rotatably connected to the frame, a winding roll disposed relative to the winding roller, a winding motor passing through the frame and connected to one end of the winding roller, a first pulley disposed at one end of the winding roller, a transmission belt connected to the first pulley, and a second pulley disposed at the other end of the transmission belt and connected to the winding roll.

[0010] By adopting the above technical solution, the floating adjusting roller performs secondary pressure adjustment on the finished plastic film during the winding process, ensuring the flat winding of the plastic film. The take-up roller, through its rotatable connection with the frame, contacts the plastic film after inkjet printing, guiding it in the winding direction for easy subsequent winding operations. The take-up roll is used to store and wind up the finished plastic film, ensuring the orderly stacking of the finished film. The winding motor drives the take-up roller to rotate, which in turn drives the first pulley to rotate. The first pulley is connected to the second pulley via a transmission belt, causing the second pulley to rotate, ultimately driving the take-up roll to rotate, thus achieving the winding of the plastic film.

[0011] As a preferred embodiment, each floating adjustment roller includes a third mounting plate fixedly connected to the frame, a first floating roller disposed on the front end face of the third mounting plate, a second floating roller disposed on the rear end face of the third mounting plate, a floating roller mounting plate disposed at the connection point between the first floating roller and the second floating roller and the third mounting plate, a stress sensor disposed at the connection point between the first floating roller and the second floating roller and the floating roller mounting plate, and an electric telescopic shaft connected to the floating roller mounting plate. The stress sensor is configured as a pneumatic pressure sensor, and the signal output terminal of the stress sensor is electrically connected to the signal input terminal of the control box body. The signal output terminal of the control box body is electrically connected to the signal input terminal of the electric telescopic shaft.

[0012] By adopting the above technical solution, the air pressure sensor can easily feed back the tension of the first and second floating rollers on the floating roller mounting plate to the control box body due to the plastic film, thus compensating for the difference in the extensibility of the plastic film.

[0013] As a preferred embodiment, the electric telescopic shaft is fixedly connected to the floating roller mounting plate, the output shaft of the electric telescopic shaft is connected to the floating roller mounting plate, and connecting bolts are respectively provided at the connection points between the floating roller mounting plate and the first floating roller and the second floating roller.

[0014] By adopting the above technical solution, each floating adjustment roller consists of a third mounting plate, a first floating roller, a second floating roller, a floating roller mounting plate, a stress sensor, and an electric telescopic shaft. The third mounting plate is fixedly connected to the frame, providing a stable mounting base. The first and second floating rollers are respectively mounted at the front and rear ends of the third mounting plate and connected via the floating roller mounting plate. The stress sensor is located at the connection between the first and second floating rollers and the floating roller mounting plate, capable of sensing the tension applied by the plastic film to the floating roller mounting plate and converting it into an electrical signal. The air pressure sensor facilitates real-time feedback of tension information to the control box body. The control box body receives the signal and instructs the electric telescopic shaft to perform corresponding adjustment actions.

[0015] As a preferred embodiment, the gravure printing mechanism includes a first mounting plate fixedly connected to the frame, a printing roller rotatably connected to the first mounting plate, and a scraper assembly respectively disposed on both sides of the printing roller. The scraper assembly includes a scraper mounting shaft rotatably connected to the first mounting plate, a scraper fixedly disposed on the scraper mounting shaft relative to the printing roller, a scraper body connected to the scraper mounting shaft, and an adjusting member disposed between the scraper body and the scraper mounting shaft.

[0016] By adopting the above technical solution, the first mounting plate is fixedly connected to the frame, providing an installation position for the printing roller. The printing roller is rotatably connected via the first mounting plate and can rotate during the printing process to achieve ink transfer. The doctor blade assembly includes a doctor blade mounting shaft and a doctor blade. The doctor blade mounting shaft is rotatably connected via the first mounting plate, and the doctor blade is fixedly mounted on the doctor blade mounting shaft to scrape off excess ink, ensuring that the ink is evenly transferred to the printing plate. The doctor blade body and the doctor blade mounting shaft are connected by an adjusting component.

[0017] As a preferred embodiment, the adjusting component includes adjusting sleeves fixedly disposed at both ends of the scraper body, a connecting sleeve fixedly disposed between the adjusting sleeve and the scraper mounting shaft, and an adjusting handwheel connected to the adjusting sleeve. The adjusting handwheel is connected to the adjusting sleeve via a threaded structure, and the connecting sleeve is rotatably connected to the scraper mounting shaft.

[0018] By adopting the above technical solution, the adjusting component consists of an adjusting handwheel, an adjusting sleeve, and a connecting sleeve. The adjusting handwheel is connected to the adjusting sleeve via a threaded structure, allowing the scraper body to adjust its angle. This precisely controls the distance between the scraper and the printing roller, ensuring effective ink scraping. When the printing roller rotates, the scraper, guided by the scraper body, accurately removes excess ink from the surface of the printing roller, guaranteeing printing quality. By adjusting the handwheel, the scraper angle can be easily adjusted to adapt to different process requirements, achieving efficient and precise ink scraping.

[0019] As a preferred embodiment, the UV inkjet printing mechanism includes a second mounting plate fixedly connected to the frame, a linear slide rail connected to the second mounting plate, an ink cartridge connected to the linear slide rail, a printhead connected to the ink cartridge, and printhead positioning plates disposed on both sides of the lower end face of the ink cartridge. The ink cartridge is connected to the printhead through an ink supply pipeline, and a magnetic stirrer is provided inside the ink cartridge.

[0020] By adopting the above technical solution, the sedimentation of UV ink pigments is prevented, and the ink supply pipeline is made of fluororubber material, which is resistant to UV ink corrosion.

[0021] As a preferred embodiment, the UV curing chamber is uniformly equipped with LED ultraviolet lamp modules and a light wavelength switching unit for controlling the LED ultraviolet lamp modules. The wavelength range of the light wavelength switching unit is set to 365nm-395nm, and the light wavelength switching unit is electrically connected to the control box body.

[0022] By adopting the above technical solution, LED ultraviolet lamp modules are uniformly arranged inside. These lamp modules can emit ultraviolet light of different wavelengths, which can be flexibly adjusted by the light wavelength switching unit. The wavelength range is from 365nm to 395nm, thereby realizing two modes: optimized plastic adhesion and high-speed curing, effectively improving the drying and fixing speed of the coating. The LED ultraviolet lamps are responsible for emitting ultraviolet light, while the light wavelength switching unit adjusts the wavelength of the ultraviolet light according to actual needs.

[0023] As a preferred embodiment, it also includes a connecting flange port located at one end of the UV lamp curing chamber, the connecting flange port being externally connected to a circulating cooling device.

[0024] By adopting the above technical solution, the circulating cooling air introduced through the connecting flange ensures a suitable temperature for the enclosure, enabling the coating to cure and dry quickly and evenly, thus completing the entire curing process.

[0025] In summary, this application includes the following beneficial technical effects:

[0026] 1. The unwinding roller is used to introduce the plastic film from the unwinding point. The floating adjustment roller adjusts the tension of the plastic film to ensure that it maintains good film stretchability during inkjet printing, so as to avoid curling caused by tension changes during the winding process.

[0027] 2. The UV curing chamber is used to cure the coating with ultraviolet light after printing on plastic film, ensuring that the coating dries and sets quickly;

[0028] 3. The printing mechanism comprises two parts: gravure printing and UV inkjet printing. It integrates gravure printing and UV inkjet printing functions on plastics, improving production efficiency and print quality. The control box is used to control the operation of the entire equipment, ensuring that all components work together harmoniously. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the plastic gravure printing equipment integrating UV inkjet printing function as described in this application;

[0030] Figure 2 This application relates to a plastic gravure printing equipment that integrates UV inkjet coding functionality. Figure 1 Another structural diagram from a different perspective;

[0031] Figure 3 This is a schematic diagram of the floating adjustment roller in the plastic gravure printing equipment with integrated UV inkjet printing function of this application;

[0032] Figure 4 This is a schematic diagram of the gravure printing mechanism in the plastic gravure printing equipment with integrated UV inkjet printing function of this application;

[0033] Figure 5 This is a schematic diagram of the UV inkjet printing mechanism in the plastic gravure printing equipment integrating UV inkjet printing function of this application.

[0034] Explanation of reference numerals in the attached drawings: 100, Control box body; 1, Frame; 11, Feed roll; 121, Take-up roll; 122, Take-up roll; 2, Floating adjusting roll; 3, Gravure printing mechanism; 31, First mounting plate; 32, Printing roll; 33, Scraper mounting shaft; 341, Scraper body; 342, Scraper blade; 35, Adjusting sleeve; 36, Adjusting handwheel; 361, Connecting cylinder; 4, UV coding mechanism; 41, Second mounting plate; 42, Ink cartridge; 421, Printhead positioning plate; 43, Linear slide rail; 51, Third mounting plate; 521, First floating roll; 522, Second floating roll; 531, Floating roll mounting plate; 5311, Fixing bolt; 54, Stress sensor; 55, Electric telescopic shaft; 61, First pulley; 62, Second pulley; 63, Transmission belt; 611, Drive motor; 7, UV lamp curing chamber; 71, Connecting flange. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application discloses a plastic gravure printing device with integrated UV inkjet coding function. It includes a frame 1, a feeding roller disposed at one end of the frame 1, a winding unit disposed at the other end of the frame 1, a printing mechanism disposed relative to the winding unit, floating adjustment rollers 2 disposed on both sides of the printing mechanism, a UV lamp curing box 7 fixedly disposed at one end of the frame 1 relative to the winding unit, and a control box body 100 fixedly disposed on one side of the frame 1.

[0037] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The printing mechanism includes a gravure printing mechanism 3 and a UV inkjet printing mechanism. In this invention, after the plastic film exits from the feeding roller, its tension is adjusted by the floating adjusting roller 2 before entering the printing mechanism for printing. After gravure printing and UV inkjet printing, the coating is cured by a UV lamp curing box, and finally, it is wound up by the winding unit. In this way, the equipment not only improves printing efficiency but also effectively controls the tension change of the plastic film during winding, reducing curling and thus improving the quality of the finished plastic film.

[0038] Reference Figure 1 and Figure 2The winding unit includes a take-up roller 121 rotatably connected to the frame 1, a take-up roll 122 positioned relative to the take-up roller 121, a winding motor passing through the frame 1 and connected to one end of the take-up roller 121, a first pulley 61 at one end of the take-up roller 121, a transmission belt 63 connected to the first pulley 61, and a second pulley 62 at the other end of the transmission belt 63 and connected to the take-up roll 122. A floating adjusting roller 2 performs secondary pressure adjustment on the finished plastic film during the winding process to ensure flat winding of the plastic film. The take-up roller 121, through its rotatable connection to the frame 1, contacts the printed plastic film and guides it to the winding direction for easy subsequent winding operations. The take-up roll 122 is used to store and wind up the finished plastic film, ensuring orderly stacking of the finished film. The winding motor drives the take-up roller 121 to rotate, which in turn drives the first pulley 61 to rotate. The first pulley 61 is connected to the second pulley 62 via the transmission belt 63, causing the second pulley 62 to rotate, which in turn drives the take-up roll 122 to rotate, thus achieving the winding of the plastic film. The working principle is as follows: After being printed, the plastic film is guided by the take-up roller 121 to the take-up roll 122 position by the pressure adjustment of the floating adjusting roller 2. When the winding motor starts, the output shaft drives the take-up roller 121 to rotate, causing the first pulley 61 to rotate accordingly. Connected by the transmission belt 63, this drives the second pulley 62 and the take-up roll 122 to rotate synchronously, thereby completing the orderly winding of the finished plastic film.

[0039] Reference Figure 1 , Figure 2 and Figure 3Each floating adjustment roller 2 includes a third mounting plate 51 fixedly connected to the frame 1, a first floating roller 521 disposed on the front end face of the third mounting plate 51, a second floating roller 522 disposed on the rear end face of the third mounting plate 51, a floating roller mounting plate 531 disposed at the connection between the first floating roller 521 and the second floating roller 522 and the third mounting plate 51, a stress sensor 54 disposed at the connection between the first floating roller 521 and the second floating roller 522 and the floating roller mounting plate 531, and an electric telescopic shaft 55 connected to the floating roller mounting plate 531. The stress sensor 54 is a pneumatic sensor, and the signal output terminal of the stress sensor 54 is electrically connected to the signal input terminal of the control box body 100. The output end is electrically connected to the signal input end of the electric telescopic shaft 55. The air pressure sensor facilitates feedback on the tension of the first floating roller 521 and the second floating roller 522 on the floating roller mounting plate 531 to the control box body 100, compensating for the difference in the extensibility of the plastic film. The electric telescopic shaft 55 is fixedly connected to the floating roller mounting plate 531, and the output shaft of the electric telescopic shaft 55 is connected to the floating roller mounting plate 531. Connecting bolts are respectively provided at the connection points between the floating roller mounting plate 531 and the first floating roller 521 and the second floating roller 522. Each floating adjustment roller 2 consists of components such as the third mounting plate 51, the first floating roller 521, the second floating roller 522, the floating roller mounting plate 531, the stress sensor 54, and the electric telescopic shaft 55. The third mounting plate 51 is fixedly connected to the frame 1, providing a fixed mounting base. The first floating roller 521 and the second floating roller 522 are respectively installed at the front and rear ends of the third mounting plate 51 and connected through the floating roller mounting plate 531. A stress sensor 54 is located at the connection between the first floating roller 521, the second floating roller 522, and the floating roller mounting plate 531. It senses the tension of the plastic film applied to the floating roller mounting plate 531 and converts it into an electrical signal. A pressure sensor facilitates real-time feedback of tension information to the control box body 100. The control box body 100 receives the signal and instructs the electric telescopic shaft 55 to perform corresponding adjustment actions. The electric telescopic shaft 55 is fixedly connected to the floating roller mounting plate 531 via connecting bolts and directly connected to the floating roller mounting plate 531 via an output shaft. It can change the position of the floating roller mounting plate 531 according to the instructions of the control box body 100, thereby adjusting the contact tension of the first floating roller 521 and the second floating roller 522 on the plastic film. This design ensures that the plastic film maintains good extensibility during inkjet printing, avoiding winding and curling caused by tension changes.

[0040] Reference Figure 1 , Figure 2 and Figure 4The gravure printing mechanism 3 includes a first mounting plate 31 fixedly connected to the frame 1, a printing roller 32 rotatably connected to the first mounting plate 31, and ink scraping assemblies respectively disposed on both sides of the printing roller 32. The ink scraping assemblies include a scraper mounting shaft 33 rotatably connected to the first mounting plate 31, a scraper blade 342 fixedly disposed on the scraper mounting shaft 33 relative to the printing roller 32, a scraper body 341 connected to the scraper mounting shaft 33, and an adjusting member disposed between the scraper body 341 and the scraper mounting shaft 33. The first mounting plate 31 is fixedly connected to the frame 1, providing an installation position for the printing roller 32. The printing roller 32 is rotatably connected via the first mounting plate 31 and can rotate during the printing process to achieve ink transfer. The ink scraping assembly includes a scraper mounting shaft 33 and a scraper blade 342. The scraper mounting shaft 33 is rotatably connected via the first mounting plate 31, and the scraper blade 342 is fixedly disposed on the scraper mounting shaft 33 to scrape off excess ink, ensuring uniform ink transfer to the printing plate. The scraper body 341 is connected to the scraper mounting shaft 33 by an adjusting component.

[0041] Reference Figure 1 , Figure 2 and Figure 5 The adjusting component includes adjusting sleeves 35 fixedly mounted at both ends of the scraper body 341, a connecting sleeve 361 fixedly mounted between the adjusting sleeves 35 and the scraper mounting shaft 33, and an adjusting handwheel 36 connected to the adjusting sleeves 35. The adjusting handwheel 36 is connected to the adjusting sleeves 35 via a threaded structure, and the connecting sleeve 361 is rotatably connected to the scraper mounting shaft 33. The adjusting component consists of the adjusting handwheel 36, the adjusting sleeves 35, and the connecting sleeve 361. The adjusting handwheel 36 is connected to the adjusting sleeves 35 via a threaded structure, allowing the scraper body 341 to adjust its angle, thereby precisely controlling the distance between the scraper blade 342 and the printing roller 32 to ensure effective ink scraping. When the printing roller 32 rotates, the scraper blade 342, guided by the scraper body 341, accurately scrapes away excess ink from the surface of the printing roller 32, ensuring printing quality. By rotating the adjusting handwheel 36, the scraper angle can be easily adjusted to adapt to different process requirements and achieve efficient and precise ink scraping.

[0042] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5The UV inkjet printing mechanism includes a second mounting plate 41 fixedly connected to the frame 1, a linear guide rail 43 connected to the second mounting plate 41, an ink cartridge 42 connected to the linear guide rail 43, a printhead connected to the ink cartridge 42, and printhead positioning plates 421 disposed on both sides of the lower end face of the ink cartridge 42. The ink cartridge 42 is connected to the printhead via an ink supply pipeline. A magnetic stirrer is installed inside the ink cartridge 42 to prevent UV ink pigment sedimentation. The ink supply pipeline is made of fluororubber, which is resistant to UV ink corrosion. The printheads are arranged in a piezoelectric UV printhead array, with each printhead installed at a 15° angle to prevent ink dripping. The printhead positioning plates 421 are fixed to both sides of the ink cartridge 42 with bolts. The ink cartridge 42 contains a magnetic stirrer to prevent UV ink pigment sedimentation, and the ink supply pipeline is made of fluororubber to ensure resistance to UV ink corrosion. The piezoelectric UV printhead array, with each printhead installed at a 15° angle, effectively prevents ink dripping. The printhead positioning plate 421 is fixed to both sides of the ink cartridge 42 by bolts, ensuring that the distance between the printhead and the film remains constant at 1.5±0.1mm. The working principle is as follows: the linear guide rail 43 drives the ink cartridge 42 to move, ensuring a stable ink supply during printing; the magnetic stirrer keeps the ink uniform and prevents pigment sedimentation; the printhead is installed at an angle to reduce ink dripping, while the corrosion-resistant ink supply pipeline ensures reliable ink delivery; the printhead positioning plate 421 ensures precise alignment between the printhead and the film.

[0043] Reference Figure 1 and Figure 2 The UV curing chamber 7 contains evenly distributed LED ultraviolet lamp modules and a wavelength switching unit for controlling these modules. The wavelength switching unit has a range of 365nm-395nm and is electrically connected to the control box body 100. These modules emit ultraviolet light of different wavelengths, which can be flexibly adjusted via the wavelength switching unit. This allows for both optimized plastic adhesion and high-speed curing, effectively improving the drying and setting speed of the coating. The LED ultraviolet lamps emit ultraviolet light, while the wavelength switching unit adjusts the wavelength according to actual needs.

[0044] Reference Figure 2 It also includes a connecting flange 71 located at one end of the UV lamp curing chamber 7. The connecting flange 71 is externally connected to a circulating cooling device. The circulating cooling air introduced through the connecting flange 71 ensures that the chamber temperature is suitable, so that the coating can be cured and dried quickly and evenly, thereby completing the entire curing process.

[0045] The implementation principle of a plastic gravure printing device integrating UV inkjet printing function according to an embodiment of this application is as follows: During use, after the plastic film exits from the feeding roller, the tension of the exiting plastic film is adjusted by the floating adjusting roller 2. The printing roller 32 is rotatably connected via the first mounting plate 31 and can rotate during the printing process to achieve ink transfer. The squeegee mounting shaft 33 is rotatably connected via the first mounting plate 31, and the squeegee 342 is fixedly mounted on the squeegee mounting shaft 33 to scrape off excess ink, ensuring uniform ink transfer to the printing plate. The adjusting handwheel 36 is connected to the adjusting sleeve 35 via a threaded structure, allowing the squeegee body 341 to be adjusted in angle, thereby precisely controlling the distance between the squeegee 342 and the printing roller 32 to ensure effective ink scraping. When the printing roller 32 rotates, the squeegee 342, guided by the squeegee body 341, accurately scrapes off excess ink from the surface of the printing roller 32, ensuring printing quality. The ink cartridge 42 is moved by the linear guide rail 43 to ensure a stable ink supply during printing; a magnetic stirrer keeps the ink uniform and prevents pigment sedimentation; the printhead is installed at an angle to reduce ink dripping, while the corrosion-resistant ink supply pipeline ensures reliable ink delivery; the printhead positioning plate 421 ensures precise alignment between the printhead and the film; the LED ultraviolet lamp emits ultraviolet light, and the light wavelength switching unit adjusts the wavelength of the ultraviolet light according to actual needs; the circulating cooling air introduced through the connecting flange 71 ensures a suitable temperature for the chamber, allowing the coating to cure and dry quickly and evenly, thus completing the entire curing process. After printing, the plastic film is pressure-adjusted by the floating adjusting roller 2 and guided by the take-up roller 121 to the take-up roll 122. When the take-up motor starts, the output shaft drives the take-up roller 121 to rotate, causing the first pulley 61 to rotate accordingly. Through the transmission belt 63, the second pulley 62 and the take-up roll 122 rotate synchronously, thus completing the orderly winding of the finished plastic film.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A plastic gravure printing device integrating UV inkjet printing function, characterized in that: It includes a frame (1), a feeding roller disposed at one end of the frame (1), a winding unit disposed at the other end of the frame (1), a printing mechanism disposed relative to the winding unit, floating adjustment rollers (2) disposed on both sides of the printing mechanism, a UV lamp curing box (7) fixedly disposed at one end of the frame (1) relative to the winding unit, and a control box body (100) fixedly disposed on one side of the frame (1). The printing mechanism includes a gravure printing mechanism (3) and a UV inkjet printing mechanism.

2. The plastic gravure printing equipment with integrated UV inkjet coding function according to claim 1, characterized in that: The winding unit includes a take-up roller (121) rotatably connected to the frame (1), a take-up roll (122) disposed relative to the take-up roller (121), a winding motor passing through the frame (1) and connected to one end of the take-up roller (121), a first pulley (61) disposed at one end of the take-up roller (121), a transmission belt (63) connected to the first pulley (61), and a second pulley (62) disposed at the other end of the transmission belt (63) and connected to the take-up roll (122).

3. A plastic gravure printing equipment with integrated UV inkjet coding function according to claim 2, characterized in that: Each floating adjustment roller (2) includes a third mounting plate (51) fixedly connected to the frame (1), a first floating roller (521) disposed on the front end face of the third mounting plate (51), a second floating roller (522) disposed on the rear end face of the third mounting plate (51), a floating roller mounting plate (531) disposed at the connection between the first floating roller (521) and the second floating roller (522) and the third mounting plate (51), a stress sensor (54) disposed at the connection between the first floating roller (521) and the second floating roller (522) and the floating roller mounting plate (531), and an electric telescopic shaft (55) connected to the floating roller mounting plate (531). The stress sensor (54) is configured as a pneumatic sensor, and the signal output end of the stress sensor (54) is electrically connected to the signal input end of the control box body (100). The signal output end of the control box body (100) is electrically connected to the signal input end of the electric telescopic shaft (55).

4. A plastic gravure printing device integrating UV inkjet printing function according to claim 3, characterized in that: The output shaft of the electric telescopic shaft (55) is connected to the floating roller mounting plate (531), and connecting bolts are respectively provided at the connection points between the floating roller mounting plate (531) and the first floating roller (521) and the second floating roller (522).

5. A plastic gravure printing device integrating UV inkjet printing function according to claim 4, characterized in that: The gravure printing mechanism (3) includes a first mounting plate (31) fixedly connected to the frame (1), a printing roller (32) rotatably connected to the first mounting plate (31), and a scraper assembly respectively disposed on both sides of the printing roller (32). The scraper assembly includes a scraper mounting shaft (33) rotatably connected to the first mounting plate (31), a scraper (342) fixedly disposed on the scraper mounting shaft (33) relative to the printing roller (32), a scraper body (341) connected to the scraper mounting shaft (33), and an adjusting member disposed between the scraper body (341) and the scraper mounting shaft (33).

6. A plastic gravure printing device integrating UV inkjet printing function according to claim 5, characterized in that: The adjusting component includes adjusting sleeves (35) fixedly disposed at both ends of the scraper body (341), a connecting sleeve (361) fixedly disposed between the adjusting sleeve (35) and the scraper mounting shaft (33), and an adjusting handwheel (36) connected to the adjusting sleeve (35). The adjusting handwheel (36) is connected to the adjusting sleeve (35) by a threaded structure, and the connecting sleeve (361) is rotatably connected to the scraper mounting shaft (33).

7. A plastic gravure printing device integrating UV inkjet printing function according to claim 6, characterized in that: The UV inkjet printing mechanism includes a second mounting plate (41) fixedly connected to the frame (1), a linear slide rail (43) connected to the second mounting plate (41), an ink cartridge (42) connected to the linear slide rail (43), a printhead connected to the ink cartridge (42), and printhead positioning plates (421) arranged on both sides of the lower end face of the ink cartridge (42). The ink cartridge (42) is connected to the printhead through an ink supply pipeline, and a magnetic stirrer is provided inside the ink cartridge (42).

8. A plastic gravure printing device integrating UV inkjet printing function according to claim 7, characterized in that: The UV curing chamber (7) is uniformly equipped with LED ultraviolet lamp modules and a light wavelength switching unit for controlling the LED ultraviolet lamp modules. The wavelength range of the light wavelength switching unit is set to 365nm-395nm, and the light wavelength switching unit is electrically connected to the control box body (100).

9. A plastic gravure printing device integrating UV inkjet printing function according to claim 8, characterized in that: It also includes a connecting flange (71) located at one end of the UV lamp curing chamber (7), which is externally connected to a circulating cooling device.

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