Film surface printing device

Abstract

The invention relates to the technical field of film printing equipment, in particular to a film surface printing device which comprises a machine shell. The drying mechanism is used for drying the printing ink; the printing mechanism is used for printing the film; the guide mechanism is used for guiding the film to move; the printing mechanism is arranged on the side face of the machine shell, the drying mechanism is arranged at the top end of the machine shell, and the guiding mechanism is arranged on the machine shell. A large amount of low-grade waste heat generated by the drying mechanism is converted from traditional direct discharge into preheating of a storage box in the printing mechanism through the arranged heat conduction pipe. Under the condition that extra energy consumption is not increased, a stable and continuous heat source is provided for the ink box, and therefore electric energy consumption of ink path temperature control is reduced. By arranging the pipeline and connecting the two fans, two air flows can be formed in the spacing cylinder, so that the two drying cylinders can be conveniently switched between the air inlet end and the air outlet end, the waste gas is utilized to simply dehumidify the to-be-used drying cylinder, and the service life of the drying cylinders is prolonged.

Description

Technical Field

[0001] This invention relates to the field of thin film printing equipment technology, specifically to a thin film surface printing device. Background Technology

[0002] In continuous printing production of thin film materials, the stability of the printing unit is the first key factor determining the final print quality. One of the core functions of the printing unit is to continuously, stably, and uniformly transfer ink from the ink cartridge to the printing plate, and then through a series of precision rollers to the film substrate. During this process, the physical state of the ink, especially its viscosity and temperature, are fundamental variables affecting transfer accuracy, printing uniformity, and final adhesion. Ink viscosity directly determines its filling effect in the cells of the anilox roller, its shearing behavior under the doctor blade, and its transfer rate and spreading / leveling properties between the printing plate and the film.

[0003] Most existing low-to-medium speed or traditional printing equipment lacks active ink path temperature control; the ink temperature depends entirely on the ambient temperature and the equipment's self-heating during operation. Temperature fluctuations cause significant changes in ink viscosity, forcing operators to frequently add thinner or undiluted ink to adjust the viscosity. This not only disrupts the stability of the mixing ratio and introduces human error but also leads to fluctuations in printed hue and density, directly affecting batch consistency. Therefore, we propose a thin-film surface printing device. Summary of the Invention

[0004] The purpose of this invention is to provide a thin film surface printing apparatus that solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A thin film surface printing apparatus, comprising a housing; Drying unit, used for drying printing inks; A printing facility used for printing on thin films; A guiding mechanism is used to guide the movement of the film; The printing mechanism is located on the side of the machine housing, the drying mechanism is located on the top of the machine housing, and the guiding mechanism is located on the machine housing.

[0006] Preferably, the drying mechanism includes a low-pressure drying component, which includes a low-pressure chamber. The low-pressure chamber is fixedly connected to the top of the machine casing, and two openings are respectively opened at both ends of the low-pressure chamber.

[0007] Preferably, a preheating plate is fixedly connected inside the low-pressure box. The preheating plate has a hollow structure and an exhaust hole is provided at the bottom end of the preheating plate.

[0008] Preferably, a high-temperature drying component is provided on one side of the low-pressure drying component. The high-temperature drying component includes a drying chamber, which is fixedly connected to the housing. An exhaust pipe is fixedly connected inside the drying chamber, and an air nozzle is fixedly connected to the exhaust pipe.

[0009] Preferably, the drying oven is provided with a homogenization component on its side. The homogenization component includes a homogenization box, which is fixedly connected to the side of the drying oven. A spacer cylinder is fixedly connected to the top of the homogenization box, and drying cylinders are respectively connected to both sides of the spacer cylinder through pipes.

[0010] Preferably, a fan is fixedly connected to the side of the casing, and the two ends of the fan are respectively connected to the exhaust pipe and the spacer cylinder through pipes. A dehumidifying block is fixedly connected inside the drying cylinder, and both drying cylinders are connected to the preheating plate through pipes.

[0011] Preferably, the printing mechanism includes a printing roller rotatably connected to the machine housing, a receiving roller connected to the side of the printing roller rotatably connected to the machine housing, a storage box fixedly connected to the machine housing, and a heat-conducting pipe fixedly connected to the storage box, the heat-conducting pipe being disposed through the storage box.

[0012] Preferably, a recovery cylinder is fixedly connected inside the low-pressure box, and the recovery cylinder is connected to two drying cylinders respectively. A second fan is fixedly connected to the casing, and the two ends of the second fan are connected to the recovery cylinder and the heat conduction pipe respectively through pipes.

[0013] Preferably, the guiding mechanism includes a guide roller, which is rotatably connected to the housing and inside the drying mechanism, and a take-up roller is rotatably connected to the side of the housing away from the printing mechanism.

[0014] By employing the above technical solution, the present invention provides a thin film surface printing apparatus that has at least the following beneficial effects: (1) The present invention uses heat-conducting pipes to transform the large amount of low-grade waste heat generated by the drying mechanism from direct emission to preheating of the storage box in the printing mechanism. Without increasing additional energy consumption, it provides a stable and continuous heat source for the ink cartridge, thereby reducing the power consumption of ink path temperature control.

[0015] (2) By setting up pipelines and connecting two fans, the present invention can form two airflows inside the spacer cylinder, thereby facilitating the switching of the two drying cylinders at the air inlet and exhaust ends, and then using the exhaust gas to perform simple dehumidification on the drying cylinder to be used, thereby improving the service life of the drying cylinder and reducing the replacement frequency. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the invention, constitute a part of this application: Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the internal structure of the present invention. Figure 2 ; Figure 5 This is an enlarged schematic diagram of point A in the present invention; Figure 6 This is a schematic diagram of the internal structure of the present invention. Figure 3 ; Figure 7 This is an enlarged schematic diagram of section B of the present invention.

[0017] In the diagram: 1. Machine casing; 2. Printing mechanism; 21. Printing roller; 22. Printing roller; 23. Storage box; 24. Heat pipe; 3. Guiding mechanism; 31. Guiding roller; 32. Rewinding roller; 4. Drying mechanism; 41. Low-pressure drying assembly; 411. Low-pressure box; 412. Opening; 413. Preheating plate; 414. Exhaust port; 42. High-temperature drying assembly; 421. Drying box; 422. Exhaust pipe; 423. Air nozzle; 424. Drying cylinder; 425. Dehumidifying block; 426. Fan 1; 43. Homogenization assembly; 431. Homogenization box; 432. Spacer cylinder; 433. Recovery cylinder; 434. Fan 2. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 A thin film surface printing apparatus, such as Figures 1-4 , Figure 6 As shown, it includes a housing 1; the side of the housing 1 is provided with a printing mechanism 2 for printing on thin films.

[0020] Specifically, the printing mechanism 2 includes a printing roller 21, which is rotatably connected to the housing 1. The printing roller 21 receives ink from the anilox roller and transfers the pattern or text onto the film through the ink, performing a printing operation on the film. A substrate roller 22 is connected to the side of the printing roller 21 and is rotatably connected to the housing 1. The substrate roller 22 supports the film and presses the film against the ink-laden printing roller 21, thereby completing the final transfer of ink. A storage box 23 is fixedly connected to the housing 1, and a heat conduction pipe 24 is fixedly connected to the storage box 23. The heat conduction pipe 24 passes through the storage box 23. The storage box 23 is used to store ink. Inside the storage box 23, an ink fountain roller and an anilox roller are rotatably connected. The ink fountain roller picks up ink from the ink trough and transfers the ink to the anilox roller. The anilox roller precisely and quantitatively transfers the ink to the printing roller 21 through countless regularly distributed cells on its surface. The heat conduction pipe 24 is used to preheat the ink inside the storage box 23, so that the ink is kept within the set temperature range, making the ink more stable and keeping the ink viscosity stable within the optimal printing range, thereby improving the subsequent printing effect.

[0021] Example 2 like Figures 1-7 As shown, based on Embodiment 1, the top of the housing 1 is provided with a drying mechanism 4 for drying the printing ink.

[0022] In this embodiment, the drying mechanism 4 includes a low-pressure drying component 41, which is used to pre-dry the ink. The low-pressure drying component 41 includes a low-pressure box 411, which is fixedly connected to the top of the housing 1. The low-pressure box 411 has two openings 412 at both ends, which are used to accommodate the low-pressure drying component 41 and allow the film to pass through and move.

[0023] A preheating plate 413 is fixedly connected inside the low-pressure box 411. The preheating plate 413 has a hollow structure and an exhaust hole 414 is opened at the bottom of the preheating plate 413. The preheating plate 413 is used to preheat the ink on the film surface. A heating rod and a temperature control device are fixedly connected inside the preheating plate 413 to heat the preheating plate 413 and maintain it within a set temperature range. At the same time, the exhaust hole 414 is used to draw air between the preheating plate 413 and the film into the preheating plate 413, so that a low-pressure environment is formed on the film surface. By reducing the air pressure on the film surface, the evaporation rate of the solvent inside the ink is increased, so that the different depths of the ink maintain a similar drying effect, thereby improving the adhesion effect of the ink.

[0024] A high-temperature drying component 42 is provided on one side of the low-pressure drying component 41. The high-temperature drying component 42 is used to dry the ink on the film surface at high temperature, thereby further improving the ink drying effect. The high-temperature drying component 42 includes a drying chamber 421, which is fixedly connected to the housing 1. The drying chamber 421 is used to support and accommodate the high-temperature drying component 42. At the same time, the drying chamber 421 is located at one end of the low-pressure chamber 411 and can receive the film processed by the low-pressure chamber 411. Meanwhile, the residual heat inside the drying chamber 421 can flow from the opening 412 into the interior of the low-pressure chamber 411, thereby maintaining the interior of the low-pressure chamber 411 within a set temperature range. An exhaust pipe 422 is fixedly connected inside the drying chamber 421. A heating rod and a temperature control component are fixedly connected inside the exhaust pipe 422 to heat the inside of the exhaust pipe 422 and maintain it within a set temperature range. An air nozzle 423 is fixedly connected to the exhaust pipe 422. The exhaust pipe 422 is used to blow air to dry the film inside the drying chamber 421. The air nozzle 423 is used to reduce the air outlet diameter, thereby increasing the air outlet pressure, so that the pre-dried ink can be quickly dried by high-pressure hot air.

[0025] A homogenization component 43 is provided on the side of the drying oven 421. The homogenization component 43 is used to homogenize the film and the ink on the film surface, so that the film gradually moves from a high-temperature environment to a low-temperature external environment, avoiding excessive stress caused by sudden cooling that would affect the film quality. The homogenization component 43 includes a homogenization box 431, which is fixedly connected to the side of the drying oven 421. A spacer cylinder 432 is fixedly connected to the top of the inside of the homogenization box 431. Drying cylinders 424 are connected to both sides of the spacer cylinder 432 through pipes. The spacer cylinder 432 is used to connect two drying cylinders 424 and can switch between the drying cylinders 424 after long-term use, so that maintenance of the drying cylinders 424 can be carried out without affecting the normal operation of printing.

[0026] A fan 426 is fixedly connected to the side of the casing 1. The two ends of the fan 426 are connected to the exhaust pipe 422 and the spacer 432 through pipes, respectively. A dehumidifying block 425 is fixedly connected inside the drying cylinder 424. Both drying cylinders 424 are connected to the preheating plate 413 through pipes. The fan 426 is used to provide power to the high-temperature drying component 42 and the low-pressure drying component 41. The air inlet of the fan 426 draws air from inside the preheating plate 413 through the drying cylinder 424, and after drying in the drying cylinder 424, it is discharged from the air nozzle 423 to form high-temperature dry hot air to dry the ink.

[0027] A recovery cylinder 433 is fixedly connected inside the low-pressure box 411. The recovery cylinder 433 is connected to two drying cylinders 424 respectively. A second fan 434 is fixedly connected to the casing 1. The two ends of the second fan 434 are connected to the recovery cylinder 433 and the heat conduction pipe 24 respectively through pipes. The recovery cylinder 433 is used to recover the waste gas inside the drying box 421 and guide the high-temperature gas to the heat conduction pipe 24, so as to preheat the ink. Meanwhile, a through hole is provided at the bottom of the spacer cylinder 432, and the air inlet pipe of the fan 426 and the through hole of the spacer cylinder 432 are located on opposite sides of the spacer cylinder 432. The two drying cylinders 424 are also symmetrically arranged on both sides of the spacer cylinder 432. Therefore, the two sets of gases form turbulence inside the spacer cylinder 432, which causes the air entering the spacer cylinder 432 through the drying cylinder 424 and the air flowing into the spacer cylinder 432 from the through hole to mix with each other and enter the exhaust cylinder 422 and the other drying cylinder 424 respectively. At the same time, a three-way valve is provided on the pipeline to switch the pipeline connection, so that the two drying cylinders 424 can be easily switched between the air inlet end and the exhaust end. In this way, the high temperature residual heat inside the drying box 421 is used to dry the drying cylinders 424 and extend the service life of the drying cylinders 424.

[0028] Example 3 like Figures 1-4 , Figure 6 As shown, based on Embodiment 2, the housing 1 is provided with a guiding mechanism 3 for guiding the movement of the film.

[0029] In this embodiment, the guiding mechanism 3 includes a guiding roller 31, which is rotatably connected to the housing 1 and the inside of the drying mechanism 4. The guiding roller 31 guides the film to move smoothly in the printing machine, thereby maintaining constant tension of the film during movement. A take-up roller 32 is rotatably connected to the side of the housing 1 away from the printing mechanism 2. The take-up roller 32 is used to take up the processed film.

[0030] In the use of the film surface printing apparatus of the present invention, after the film has completed the printing operation, it first moves into the low-pressure chamber 411. A blower 426 extracts air from the spacer cylinder 432, and the low pressure inside the spacer cylinder 432 extracts air from the preheating plate 413, creating a low-pressure state between the preheating plate 413 and the film. Simultaneously, because the film is kept taut by the guide roller 31, it is not sucked into the surface of the preheating plate 413 by air pressure. The heat radiation generated by the heating device inside the preheating plate 413 preheats the ink on the film surface. Simultaneously, due to the low-pressure environment, the boiling point of the solvent inside the ink decreases, and the evaporation rate increases. Subsequently, the film moves through the opening 412 into the drying chamber 421. The pretreated film enters the drying chamber 421, where the blower 426 draws air from the spacer cylinder 432 to the exhaust pipe 422, and after heating, it is discharged from the air nozzle 423, drying the ink on the film surface at high temperature. The high-temperature gas is discharged from both ends of the drying chamber 421 and passes through the homogenization chamber 431, maintaining the temperature of the film moving inside the homogenization chamber 431 and gradually cooling it down. Simultaneously, fan 434 draws air from the recovery cylinder 433 towards the heating tube, utilizing the residual heat in the exhaust gas from the drying chamber 421 to preheat the ink in the storage box 23, improving ink adhesion. At the same time, fans 426 and 434 draw air from adjacent sides into the spacer cylinder 432, creating turbulence within the spacer cylinder 432. After prolonged operation, by switching the two three-way valves to the corresponding exhaust and inlet ports, the exhaust gas can be used to treat the dehumidifier block 425 inside the drying cylinder 424, extending its lifespan and reducing its replacement frequency.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thin film surface printing apparatus, characterized in that: Including the casing (1); Drying unit (4) is used to dry printing ink; Printing unit (2), used for printing on thin films; Guiding mechanism (3) is used to guide the movement of the film; The printing mechanism (2) is located on the side of the housing (1), the drying mechanism (4) is located on the top of the housing (1), and the guiding mechanism (3) is located on the housing (1).

2. The thin film surface printing apparatus according to claim 1, characterized in that: The drying mechanism (4) includes a low-pressure drying component (41), which includes a low-pressure box (411). The low-pressure box (411) is fixedly connected to the top of the casing (1), and two openings (412) are respectively opened at both ends of the low-pressure box (411).

3. The thin film surface printing apparatus according to claim 2, characterized in that: The low-pressure box (411) is fixedly connected to a preheating plate (413). The preheating plate (413) has a hollow structure and an exhaust hole (414) is provided at the bottom of the preheating plate (413).

4. The thin film surface printing apparatus according to claim 2, characterized in that: The low-pressure drying component (41) is provided with a high-temperature drying component (42) on one side. The high-temperature drying component (42) includes a drying box (421). The drying box (421) is fixedly connected to the casing (1). An exhaust pipe (422) is fixedly connected inside the drying box (421). An air nozzle (423) is fixedly connected to the exhaust pipe (422).

5. The thin film surface printing apparatus according to claim 4, characterized in that: The drying oven (421) is provided with a homogenization component (43) on its side. The homogenization component (43) includes a homogenization box (431). The homogenization box (431) is fixedly connected to the side of the drying oven (421). A spacer cylinder (432) is fixedly connected to the top inside the homogenization box (431). Drying cylinders (424) are respectively connected to both sides of the spacer cylinder (432) through pipes.

6. The thin film surface printing apparatus according to claim 5, characterized in that: A fan (426) is fixedly connected to the side of the casing (1). The two ends of the fan (426) are connected to the exhaust pipe (422) and the spacer (432) through pipes respectively. A dehumidifying block (425) is fixedly connected inside the drying cylinder (424). Both drying cylinders (424) are connected to the preheating plate (413) through pipes.

7. The thin film surface printing apparatus according to claim 1, characterized in that: The printing mechanism (2) includes a printing roller (21), which is rotatably connected to the housing (1). A printing roller (22) is connected to the side of the printing roller (21), which is rotatably connected to the housing (1). A storage box (23) is fixedly connected to the housing (1), and a heat pipe (24) is fixedly connected to the storage box (23). The heat pipe (24) passes through the storage box (23).

8. A thin film surface printing apparatus according to claim 2, characterized in that: The low-pressure box (411) is fixedly connected to a recovery cylinder (433), which is connected to two drying cylinders (424) respectively. The casing (1) is fixedly connected to a second fan (434), which is connected to the recovery cylinder (433) and the heat pipe (24) at both ends through pipes respectively.

9. A thin film surface printing apparatus according to claim 1, characterized in that: The guiding mechanism (3) includes a guide roller (31), which is rotatably connected to the housing (1) and the inside of the drying mechanism (4). A take-up roller (32) is rotatably connected to the side of the housing (1) away from the printing mechanism (2).

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