UV curing device of vacuum adsorption plane printing machine

Abstract

The utility model relates to the technical field of printing machines, in particular to a UV curing device of a vacuum adsorption plane printing machine. According to the technical scheme, a plurality of nitrogen conveying pipes and outflow air pipes are arranged in a curing area, air outlets of the nitrogen conveying pipes are close to a conveying belt, air inlets of the outflow air pipes are far away from the conveying belt, the nitrogen conveying pipes are communicated with a nitrogen pipe, the outflow air pipes are communicated with an air inlet pipe of an exhaust fan, and an oxygen content monitor is installed on a curing shell. According to the scheme, through the arrangement of the oxygen suppression mechanism, nitrogen can be continuously input into the curing shell, air in a curing area can be replaced out, a low-oxygen environment is formed, and therefore contact between oxygen and free radicals generated in the curing process is reduced, and a good protection effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of printing machine technology, and in particular to a UV curing device for a vacuum adsorption flatbed printing machine. Background Technology

[0002] A vacuum adsorption flatbed printing machine is a type of flatbed printing equipment that uses vacuum adsorption technology to fix printing materials during the printing process. During curing, ultraviolet light irradiation causes photoinitiators in the ink or coating to absorb light energy and generate free radicals, initiating polymerization reactions between monomers and oligomers, thereby rapidly curing and forming a hard film layer, thus achieving UV curing.

[0003] In UV curing, oxygen in the air is a highly reactive diradical molecule that reacts with free radicals generated by photoinitiators and active free radicals in the polymerization reaction to form relatively stable peroxide radicals or peroxides. This prevents further polymerization of monomers and oligomers, leading to a slowed or incomplete curing reaction. Especially when curing surface layers, oxygen more readily combines with surface free radicals, significantly inhibiting the surface curing reaction and causing a sticky surface, severely impacting curing quality and product performance. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a UV curing device for a vacuum adsorption flat printing machine.

[0005] The technical solution of this utility model is as follows: A UV curing device for a vacuum adsorption flat printing machine includes a frame connected to the printing machine, a shell installed on the frame, a curing shell fixed inside the shell, the curing shell including two symmetrically arranged curing areas, and a light-irradiation area between the two curing areas, a UV lamp installed in the light-irradiation area, the two curing areas being interconnected to form a material channel, and a conveyor belt provided in the material channel;

[0006] An oxygen suppression mechanism is provided within the curing area. The oxygen suppression mechanism includes several nitrogen supply pipes and outflow pipes set within the curing area. The outlet of the nitrogen supply pipe is close to the conveyor belt, while the inlet of the outflow pipe is far from the conveyor belt. Several nitrogen supply pipes are connected to nitrogen pipes, and several outflow pipes are connected to the inlet pipe of the exhaust fan. An oxygen content monitor is installed on the curing shell.

[0007] Preferably, the top of the illumination area is provided with a cover plate, the UV lamp tube is fixed on the cover plate, and two symmetrically arranged arc-shaped reflectors are provided in the illumination area. The two arc-shaped reflectors are located on both sides of the UV lamp tube, and the bottom of the illumination area is a light diffusion plate, with the conveyor belt located below the light diffusion plate.

[0008] Preferably, the two sides of the illumination area are heat insulation plates, and heat insulation material is filled between the arc-shaped reflector and the heat insulation plates.

[0009] Preferably, the outlet of the nitrogen supply pipe is fixed and connected to a transverse outlet pipe, and a flow valve is provided on the nitrogen pipe.

[0010] Preferably, a sealing door is fixedly installed on both sides of the curing shell, and the sealing door is equipped with a baffle.

[0011] Compared with existing technologies, the beneficial effects of this utility model are: by setting up an oxygen suppression mechanism, nitrogen can be continuously introduced into the curing shell to replace the air in the curing area, forming a low-oxygen environment, thereby reducing the contact between oxygen and free radicals generated during the curing process, and achieving a good protective effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0014] Figure 3 This is a schematic diagram of the horizontal air outlet pipe of this utility model.

[0015] Reference numerals: 1. Outer shell; 2. Curing shell; 3. Curing area; 4. Illuminated area; 5. UV lamp; 6. Light diffuser; 7. Curved reflector; 8. Heat insulation board; 9. Conveyor belt; 10. Nitrogen supply pipe; 11. Outlet gas pipe; 12. Oxygen content monitor; 13. Horizontal outlet pipe; 14. Nitrogen pipe; 15. Flow valve; 16. Exhaust fan; 17. Sealing door; 18. Baffle; 100. Frame. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] See attached document Figures 1-3 A UV curing device for a vacuum adsorption flatbed printing machine includes a frame 100 connected to the printing machine. A housing 1 is installed on the frame 100. A curing housing 2 is fixed inside the housing 1. The curing housing 2 includes two symmetrically arranged curing areas 3 and a light-irradiation area 4 between the two curing areas 3. A UV lamp 5 is installed in the light-irradiation area 4. The two curing areas 3 are interconnected to form a material channel. A conveyor belt 9 is provided in the material channel.

[0018] The light-illuminated area 4 is recessed, which allows the light generated by the UV lamp tube 5 to come into closer contact with the material on the conveyor belt 9 without being interfered with by the incoming gas, and allows the light to be processed in a separate space, thus ensuring the curing effect.

[0019] An oxygen suppression mechanism is provided in the curing zone 3. The oxygen suppression mechanism includes several nitrogen supply pipes 10 and outflow pipes 11 set in the curing zone 3. The outlet of the nitrogen supply pipe 10 is close to the conveyor belt 9, and the inlet of the outflow pipe 11 is far from the conveyor belt 9. Several nitrogen supply pipes 10 are connected to nitrogen pipes 14, and several outflow pipes 11 are connected to the inlet of exhaust fan 16. An oxygen content monitor 12 is installed in the curing shell 2.

[0020] Nitrogen pipe 14 connects to an external nitrogen generator, allowing nitrogen to be input into the curing zone 3 through nitrogen delivery pipe 10. Since the density of nitrogen is less than that of oxygen, the outlet of nitrogen delivery pipe 10 is positioned close to the conveyor belt 9. When the printed material is conveyed on the conveyor belt 9, nitrogen delivery pipe 10 will directly input nitrogen into the curing shell 2 to isolate oxygen. By activating the exhaust fan 16, the outflow pipe 11 can discharge the original gas in the curing zone 3. During this process, the oxygen in the original gas in the curing zone 3 will decrease due to its high density and continuously mix with nitrogen. During the operation, the nitrogen generator continuously inputs nitrogen, and the oxygen content in the curing shell 2 can be detected by the oxygen content monitor 12.

[0021] By continuously inputting nitrogen, the air in the curing area can be displaced, creating a low-oxygen environment. This reduces the contact between oxygen and free radicals generated during the curing process, thus providing good protection.

[0022] Specifically, the top of the illumination area 4 is provided with a cover plate, the UV lamp tube 5 is fixed on the cover plate, the illumination area 4 is provided with two symmetrically arranged arc-shaped reflectors 7, the two arc-shaped reflectors 7 are located on both sides of the UV lamp tube 5, the bottom of the illumination area 4 is a light diffusion plate 6, and the conveyor belt 9 is located below the light diffusion plate 6.

[0023] The curved reflector 7 can focus the light generated by the UV lamp tube 5, improving the light utilization rate. The light can also be diffused by the light diffusion plate 6. When the light passes through the light diffusion plate 6, it will undergo multiple refractions and reflections, thereby achieving light diffusion and expanding the curing range, thus ensuring the curing effect.

[0024] Furthermore, the sides of the illuminated area 4 are heat insulation panels 8, and the space between the arc-shaped reflector 7 and the heat insulation panels 8 is filled with heat insulation material;

[0025] When the UV lamp tube 5 operates continuously, it generates a high amount of heat. In order to prevent the gas in the curing area 3 from being heated and to increase its molecular activity, a heat insulation plate 8 and a heat insulation material are provided to insulate the heat. In this embodiment, the heat insulation material is specifically ceramic fiber.

[0026] like Figure 3 As shown, the outlet of the nitrogen delivery pipe 10 is fixed and connected to a transverse gas outlet pipe 13. A flow valve 15 is provided on the nitrogen pipe 14. When in use, the nitrogen delivery pipe 10 will discharge gas through the transverse gas outlet pipe 13. The gas discharge direction of the transverse gas outlet pipe 13 is transverse, which avoids the gas flowing directly onto the material.

[0027] It should also be noted that sealing doors 17 are fixedly installed on both sides of the curing shell 2. The sealing doors 17 are equipped with baffles 18. The baffles 18 can ensure the normal entry and exit of materials and can also prevent most of the gas from escaping.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A UV curing device for a vacuum adsorption flatbed printing machine, characterized in that, The machine includes a frame (100) connected to the printing machine, a housing (1) installed on the frame (100), a curing housing (2) fixed inside the housing (1), the curing housing (2) includes two symmetrically arranged curing areas (3), and also includes a light-emitting area (4) between the two curing areas (3), a UV lamp (5) installed in the light-emitting area (4), the two curing areas (3) are interconnected to form a material channel, and a conveyor belt (9) is provided in the material channel; An oxygen suppression mechanism is provided in the curing area (3). The oxygen suppression mechanism includes several nitrogen supply pipes (10) and outflow pipes (11) set in the curing area (3). The outlet of the nitrogen supply pipe (10) is close to the conveyor belt (9), and the inlet of the outflow pipe (11) is far from the conveyor belt (9). Several nitrogen supply pipes (10) are connected to nitrogen pipes (14), and several outflow pipes (11) are connected to the inlet of exhaust fan (16). An oxygen content monitor (12) is installed in the curing shell (2).

2. The UV curing device for a vacuum adsorption flatbed printing machine according to claim 1, characterized in that, The top of the illumination area (4) is provided with a cover plate, and the UV lamp tube (5) is fixed on the cover plate. Two symmetrically arranged arc-shaped reflectors (7) are provided in the illumination area (4). The two arc-shaped reflectors (7) are located on both sides of the UV lamp tube (5). The bottom of the illumination area (4) is a light diffusion plate (6), and the conveyor belt (9) is located below the light diffusion plate (6).

3. The UV curing device for a vacuum adsorption flatbed printing machine according to claim 2, characterized in that, The two sides of the illumination area (4) are heat insulation plates (8), and heat insulation material is filled between the arc-shaped reflector (7) and the heat insulation plates (8).

4. The UV curing device for a vacuum adsorption flatbed printing machine according to claim 1, characterized in that, The outlet of the nitrogen supply pipe (10) is fixed and connected to a transverse outlet pipe (13), and a flow valve (15) is provided on the nitrogen pipe (14).

5. The UV curing device for a vacuum adsorption flatbed printing machine according to claim 1, characterized in that, Both sides of the solidified shell (2) are fixedly installed with sealing doors (17), and the sealing doors (17) are provided with baffles (18).

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