A UV flatbed printing apparatus for fabric materials

Abstract

This utility model discloses a UV flatbed printing apparatus for fabric materials, including a frame. An unwinding device is located at one end of the frame, and a tensioning mechanism is located on one side of the unwinding device. A UV varnish printing unit is located on the side of the tensioning mechanism away from the unwinding device, a white ink printing unit is located on the side of the UV varnish printing unit away from the tensioning mechanism, and a rewinding device is located on the side of the white ink printing unit away from the four-color printing unit. This UV flatbed printing apparatus for fabric materials employs a process of pre-printing and instant curing UV-LED varnish, forming a firm and smooth underlayer on the surface of rough, easily powdery fabric materials. This fundamentally solves the quality problems such as uneven ink color and insufficient saturation caused by full-page powder shedding during subsequent four-color printing.

Description

Technical Field

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

[0002] Currently, UV-LED flatbed printing technology has become an important development direction in the printing industry due to its significant advantages such as low-temperature curing, energy saving and environmental protection, instant drying, high precision and high efficiency. This technology uses a high-power UV-LED curing system and can be widely used in printing on various materials, including traditional materials that are sensitive to heat. By instantly curing the ink after printing, it effectively avoids quality problems such as smudging and scratches, and meets the requirements of modern printing for high speed and high quality.

[0003] However, when existing UV flatbed printing equipment is applied to fabric materials with rough surfaces and loose structures, its technical limitations become apparent. First, due to the lack of an effective pretreatment unit, ink can penetrate into the fiber gaps during printing, causing the substrate to shed powder, resulting in incomplete ink coverage, insufficient saturation, and defects in the printed images. Second, traditional UV curing units are mostly static irradiation units, which can easily produce light shadows and curing dead corners on textured fabric surfaces, making it difficult to ensure three-dimensional uniform curing and affecting the quality and reliability of the finished product.

[0004] Therefore, it is necessary to propose a UV flatbed printing device for fabric materials to solve the above problems. Utility Model Content

[0005] The main objective of this invention is to provide a UV flatbed printing device for fabric materials, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A UV flatbed printing apparatus for fabric materials includes a frame, an unwinding device at one end of the frame, a tensioning mechanism on one side of the unwinding device, a UV varnish printing unit on the side of the tensioning mechanism away from the unwinding device, a white ink printing unit on the side of the UV varnish printing unit away from the tensioning mechanism, a rewinding device on the side of the white ink printing unit away from the four-color printing unit, and a UV-LED curing unit between the UV varnish printing unit and the white ink printing unit, and between the four-color printing unit and the rewinding device. The UV-LED curing unit has a lamp holder inside, and UV-LED beads are evenly arranged at the bottom of the lamp holder. A rotating shaft is fixed at the end of the lamp holder and is rotatably arranged inside the UV-LED curing unit. A gear is arranged on the rotating shaft, and a rack plate that meshes with the gear is movably arranged inside the UV-LED curing unit. A drive source for driving the rack plate to move back and forth is arranged at one end of the UV-LED curing unit.

[0007] Preferably, the drive source is a cylinder or a linear motor.

[0008] Preferably, an axial adjustment component is provided between the rotating shaft and the inner wall of the UV-LED curing unit. The axial adjustment component includes a fixed cylinder installed on the inner wall of the UV-LED curing unit and corresponding to the rotating shaft. The end of the rotating shaft is movably connected to the inner side of the fixed cylinder. The inner wall of the fixed cylinder is provided with a spiral guide groove. The end side wall of the rotating shaft is provided with a guide block that movably guides and cooperates with the guide groove, so that the rotating shaft can be axially displaced while rotating.

[0009] Preferably, the axial thickness of the gear is greater than the width of the rack plate, so that the gear will not detach from the rack plate when it follows the axial displacement of the shaft.

[0010] Preferably, the UV-LED curing unit is provided with a linear guide rail corresponding to the rack plate on its inner side, and the rack plate is movably connected to the linear guide rail.

[0011] Preferably, the UV-LED curing unit has a heat dissipation base located at the upper end of the lamp holder on its inner side. A water-cooled circulation pipe is provided inside the heat dissipation base. A coolant tank is installed inside the UV-LED curing unit. A pump is installed on one side of the coolant tank. The input end of the pump is connected to one end of the water-cooled circulation pipe, and the other end of the water-cooled circulation pipe is connected to the upper end of the coolant tank. A radiator corresponding to one end of the water-cooled circulation pipe is provided inside the UV-LED curing unit. The end of the water-cooled circulation pipe away from the pump passes through the radiator and connects to the upper end of the coolant tank.

[0012] Preferably, the bottom of the heat dissipation base is provided with a groove that matches the upper end of the lamp holder. The upper end of the lamp holder is arc-shaped, and the axis of the arc coincides with the axis of the rotating shaft. The upper end of the lamp holder is located inside the groove.

[0013] Compared with the prior art, the present invention provides a UV flatbed printing device for fabric materials, which has the following beneficial effects: 1. This fabric material uses a UV flatbed printing device, which integrates a series of functional units, including an unwinding device, a tensioning mechanism, a rewinding device, a UV varnish printing unit, a UV-LED curing unit, a white ink printing unit, and a four-color printing unit, forming a continuous and efficient production line. Compared with existing technologies, the process of printing and instantly curing UV-LED varnish first forms a solid and smooth base layer on the rough and powdery fabric material surface, fundamentally solving the quality problems such as uneven ink color and insufficient saturation caused by full-page powder shedding during subsequent four-color printing. At the same time, the white ink printing unit further enhances the color performance on dark substrates. This device successfully achieves stable production of high-quality printing effects comparable to imported materials using domestically produced low-cost fabric / PU materials, combining the dual advantages of improving product quality and reducing production costs.

[0014] 2. The UV flatbed printing device for this fabric material, through the setting of swingable and reciprocating UV-LED lamp beads, eliminates hot and cold spots caused by fixed light sources, ensuring extremely uniform distribution of light energy in the width direction of the material. Moreover, multi-angle swing irradiation can penetrate the fiber texture of the fabric material, effectively eliminating curing dead corners caused by micro shadows, and realizing three-dimensional uniform curing of ink from the surface to the bonding area with the material. Thus, without excessively increasing the light intensity at a single point, it significantly improves the curing thoroughness, product quality and production efficiency.

[0015] 3. The fabric material uses a UV flatbed printing device. Through the coordinated arrangement of a heat dissipation base, water-cooled circulation pipes, pump body, coolant tank, and radiator, the efficient water cooling system can quickly remove the massive amount of waste heat generated when high-power LEDs emit light, ensuring that the LED chips always operate within the optimal temperature range. This avoids problems such as light decay, wavelength drift, and a sharp reduction in device lifespan caused by overheating. This stable thermal management ensures high intensity and high spectral purity of ultraviolet light output, making the curing process fast and consistent. At the same time, it allows the system to operate at its rated maximum power for extended periods to meet the cycle time requirements of high-speed production lines, and fundamentally improves the stability and durability of the entire curing unit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the UV-LED curing unit of this utility model; Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This is a side view cross-sectional structural diagram of the end of the lamp holder of this utility model.

[0017] In the diagram: 1. Frame; 2. Unwinding device; 3. Tensioning mechanism; 4. Rewinding device; 5. UV varnish printing unit; 6. UV-LED curing unit; 7. White ink printing unit; 8. Four-color printing unit; 9. Guide block; 10. UV-LED lamp bead; 11. Heat dissipation base; 12. Coolant tank; 13. Pump body; 14. Water cooling circulation pipe; 15. Cooling radiator; 16. Drive source; 17. Rack plate; 18. Lamp holder; 19. Groove; 20. Shaft; 21. Gear; 22. Fixing cylinder; 23. Guide groove. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] like Figure 1-4 As shown, a UV flatbed printing apparatus for fabric materials includes a frame 1. An unwinding device 2 is provided at one end of the frame 1. A tensioning mechanism 3 is provided on one side of the unwinding device 2. A UV varnish printing unit 5 is provided on the side of the tensioning mechanism 3 away from the unwinding device 2. A white ink printing unit 7 is provided on the side of the UV varnish printing unit 5 away from the tensioning mechanism 3. A rewinding device 4 is provided on the side of the white ink printing unit 7 away from the four-color printing unit 8. A UV-LED curing unit 6 is provided between the UV varnish printing unit 5 and the white ink printing unit 7, and between the four-color printing unit 8 and the rewinding device 4. A lamp holder 18 is provided inside the UV-LED curing unit 6. UV-LED lamp beads 10 are evenly arranged at the bottom of the lamp holder 18. A rotating shaft 20 is fixed to the end of the lamp holder 18. The rotating shaft 20 is rotatably arranged inside the UV-LED curing unit 6. A gear 21 is provided on the rotating shaft 20. A rack plate 17 that meshes with the gear 21 is movably arranged inside the UV-LED curing unit 6. In order to increase the stability of the rack plate 17, a linear guide rail corresponding to the rack plate 17 is provided inside the UV-LED curing unit 6. The rack plate 17 is movably connected to the linear guide rail. The linear guide rail is a conventional technical means, which will not be described in detail in this application. One end of the UV-LED curing unit 6 is provided with a tool for driving the rack plate 17 to return to its original position. The drive source 16 for the movement is preferably a cylinder or a linear motor. Furthermore, an axial adjustment component is provided between the rotating shaft 20 and the inner wall of the UV-LED curing unit 6. The axial adjustment component includes a fixed cylinder 22 installed on the inner wall of the UV-LED curing unit 6 and corresponding to the rotating shaft 20. The end of the rotating shaft 20 is movably connected to the inner side of the fixed cylinder 22. The inner wall of the fixed cylinder 22 is provided with a spiral guide groove 23. The end side wall of the rotating shaft 20 is provided with a guide block 9 that movably guides and cooperates with the guide groove 23. Thus, the rotating shaft 20 can be axially displaced while rotating. In order to accommodate the axial displacement, the axial thickness of the gear 21 is greater than the width of the rack plate 17, so that the gear 21 will not disengage from the rack plate 17 when it follows the axial displacement of the rotating shaft 20.

[0020] In addition, to cool the UV-LED lamp beads 10, a heat dissipation base 11 is provided inside the UV-LED curing unit 6, located at the upper end of the lamp holder 18. A water-cooling circulation pipe 14 is provided inside the heat dissipation base 11. A coolant tank 12 is installed inside the UV-LED curing unit 6. A pump body 13 is installed on one side of the coolant tank 12. The input end of the pump body 13 is connected to one end of the water-cooling circulation pipe 14, and the other end of the water-cooling circulation pipe 14 is connected to the coolant tank 14. 2. The upper end is connected to the UV-LED curing unit 6. The inner side of the UV-LED curing unit 6 is provided with a radiator 15 corresponding to one end of the water-cooled circulation pipe 14. The end of the water-cooled circulation pipe 14 away from the pump body 13 passes through the radiator 15 and is connected to the upper end of the coolant tank 12. The bottom of the heat dissipation base 11 is provided with a groove 19 that is adapted to the upper end of the lamp holder 18. The upper end of the lamp holder 18 is arc-shaped, and the axis of the arc coincides with the axis of the rotating shaft 20. The upper end of the lamp holder 18 is located inside the groove 19, which can improve the heat exchange effect.

[0021] In use, the fabric material is first unwound by the unwinding device 2 and smoothly conveyed to the UV varnish printing unit 5 by the tensioning mechanism 3 for surface priming. Then, the varnish is instantly cured by the UV-LED curing unit 6 to form a smooth base. Subsequently, the material passes through the white ink printing unit 7 for color enhancement and priming and is cured again. Then, it enters the four-color printing unit 8 to complete the color graphic printing. Finally, the final UV-LED curing unit 6 ensures that the ink is completely and firmly dried, and the rewinding device 4 neatly collects it as a finished product. The entire process is continuous and automated, and all processes from the bottom treatment to color printing can be completed in one feed.

[0022] Furthermore, the specific principle of the UV-LED curing unit 6 is as follows: During use, the drive source 16 drives the rack plate 17 to move back to the starting position. The rack plate 17 drives the rotating shaft 20, lamp holder 18, and UV-LED lamp beads 10 to swing back and forth as a whole through the gear 21. At the same time, with the cooperation of the guide block 9 and the guide groove 23, the rotating shaft 20, lamp holder 18, and UV-LED lamp beads 10 move back to the starting position along the axis of the rotating shaft 20. During this period, water cooling is used to cool the lamp holder 18, and the returned coolant can be cooled through the radiator 15.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A UV flatbed printing apparatus for fabric materials, comprising a frame (1), characterized in that: One end of the frame (1) is provided with an unwinding device (2), and a tensioning mechanism (3) is provided on one side of the unwinding device (2). A UV varnish printing unit (5) is provided on the side of the tensioning mechanism (3) away from the unwinding device (2). A white ink printing unit (7) is provided on the side of the UV varnish printing unit (5) away from the tensioning mechanism (3). A winding device (4) is provided on the side of the white ink printing unit (7) away from the four-color printing unit (8). A UV-LED curing unit (6) is provided between the UV varnish printing unit (5) and the white ink printing unit (7) and between the four-color printing unit (8) and the winding device (4). The UV-LED curing unit (6) has a lamp holder (18) on its inner side. UV-LED lamp beads (10) are evenly arranged at the bottom of the lamp holder (18). A rotating shaft (20) is fixed at the end of the lamp holder (18). The rotating shaft (20) is rotatably arranged inside the UV-LED curing unit (6). A gear (21) is arranged on the rotating shaft (20). A rack plate (17) that meshes with the gear (21) is movably arranged inside the UV-LED curing unit (6). A driving source (16) for driving the rack plate (17) to move back and forth is arranged at one end of the UV-LED curing unit (6).

2. The UV flatbed printing apparatus for fabric materials according to claim 1, characterized in that: The drive source (16) is a cylinder or a linear motor.

3. The UV flatbed printing apparatus for fabric materials according to claim 1, characterized in that: An axial adjustment assembly is provided between the rotating shaft (20) and the inner wall of the UV-LED curing unit (6). The axial adjustment assembly includes a fixed cylinder (22) installed on the inner wall of the UV-LED curing unit (6) and corresponding to the rotating shaft (20). The end of the rotating shaft (20) is movably connected to the inner side of the fixed cylinder (22). The inner wall of the fixed cylinder (22) is provided with a spiral guide groove (23). The end side wall of the rotating shaft (20) is provided with a guide block (9) that movably guides and cooperates with the guide groove (23), so that the rotating shaft (20) can be axially displaced while rotating.

4. The UV flatbed printing apparatus for fabric materials according to claim 3, characterized in that: The axial thickness of the gear (21) is greater than the width of the rack plate (17), so that the gear (21) will not disengage from the rack plate (17) when it follows the axial displacement of the shaft (20).

5. The UV flatbed printing apparatus for fabric materials according to claim 1, characterized in that: The UV-LED curing unit (6) is provided with a linear guide rail corresponding to the rack plate (17) on its inner side, and the rack plate (17) is movably connected to the linear guide rail.

6. The UV flatbed printing apparatus for fabric materials according to claim 1, characterized in that: The UV-LED curing unit (6) has a heat dissipation base (11) located on the upper end of the lamp holder (18) on the inner side. A water-cooled circulation pipe (14) is provided on the inner side of the heat dissipation base (11). A coolant tank (12) is installed on the inner side of the UV-LED curing unit (6). A pump body (13) is installed on one side of the coolant tank (12). The input end of the pump body (13) is connected to one end of the water-cooled circulation pipe (14). The other end of the water-cooled circulation pipe (14) is connected to the upper end of the coolant tank (12). A radiator (15) corresponding to one end of the water-cooled circulation pipe (14) is provided on the inner side of the UV-LED curing unit (6). The end of the water-cooled circulation pipe (14) away from the pump body (13) passes through the radiator (15) and is connected to the upper end of the coolant tank (12).

7. The UV flatbed printing apparatus for fabric materials according to claim 6, characterized in that: The bottom of the heat dissipation base (11) is provided with a groove (19) that is adapted to the upper end of the lamp holder (18). The upper end of the lamp holder (18) is arc-shaped, and the axis of the arc coincides with the axis of the rotating shaft (20). The upper end of the lamp holder (18) is located inside the groove (19).

Images