LED-UV printing curing device

Abstract

The invention belongs to the technical field of printing and curing, and particularly relates to an LED-UV printing and curing device which comprises a printing and curing all-in-one machine shell, an ink jet machine, a tension expansion assembly, an inking assembly, a rotary imprinting assembly and a curing assembly. The inking assembly is fixedly connected to the interior of the printing and curing all-in-one machine shell, the rotary imprinting assembly is movably connected to the interior of the printing and curing all-in-one machine shell, the tension expansion assemblies are slidably connected to the two sides of the rotary imprinting assembly, and the curing assembly is fixedly connected to the outer side of the printing and curing all-in-one machine shell; according to the device, two groups of square rubber pads capable of moving up and down are additionally arranged, so that the two groups of square rubber pads can synchronously stretch a film outwards when the imprinting plate is matched with the bearing plate to imprint the film, the surface tension of a film material is further expanded, ink can be matched with the LED curing lamp to firmly stand on the surface of the film, and the printing curing quality is improved; and the device is compact in structure, thereby being more convenient to carry.

Description

Technical Field

[0001] The invention belongs to the technical field of printing and curing, and in particular relates to an LED-UV printing and curing device. Background Art

[0002] Digital inkjet printing is a form of printing, in which ink curing is an important process in digital inkjet printing. Only when the ink is dried and solidified on the substrate, that is, the liquid state of the ink when it is ejected from the nozzle is converted into a solid state on the substrate and firmly attached to the substrate, can a complete printing process be completed. LED-UV printing curing is under the irradiation of ultraviolet rays. The photopolymerization initiator in the LED-UV ink absorbs photons of a certain wavelength and becomes free molecules and free radicals. Then, through the energy transfer between molecules, the polymerizable prepolymer and the photosensitive monomer are in an excited state, generating a charge transfer complex, which is continuously cross-linked, polymerized, and cured to form a film.

[0003] LED-UV printing curing technology can improve the wear resistance and chemical resistance of printed products in flexographic printing. The substrates of flexographic printing are not limited to hard materials. Film materials have a softer texture. Due to the mismatch between the surface characteristics of film materials and the adhesion of ink, when the surface tension of film materials is low, it is difficult for ink to adhere firmly to its surface. The ink will disperse due to the non-stick film. The traditional method generally applies a special coating on the surface of the film material to improve its printability and improve the adhesion of the ink. However, coating treatment will increase costs, and the effect will gradually weaken over time, thereby reducing printing quality.

[0004] Therefore, an LED-UV printing and curing device is designed to solve the above problems. Summary of the invention

[0005] To solve the problems raised in the above background technology. The present invention provides an LED-UV printing and curing device. When the surface tension of the film material is low, it is difficult for the ink to adhere firmly to its surface. The ink will disperse due to the non-stick film. The traditional method generally coats a special coating on the surface of the film material to improve its printability and improve the adhesion of the ink. However, the coating process will increase the cost, and the effect will gradually weaken over time, thereby reducing the printing quality.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an LED-UV printing and curing device, comprising a printing and curing machine housing, an inkjet machine, a tension expansion component, an inking component, a rotary stamping component and a curing component, wherein the inkjet machine is threadedly connected to the top of the printing and curing machine housing, the inking component is fixedly connected to the inside of the printing and curing machine housing, the rotary stamping component is movably connected to the inside of the printing and curing machine housing, the tension expansion component is slidably connected to both sides of the rotary stamping component, and the curing component is fixedly connected to the outside of the printing and curing machine housing; The printing and curing integrated machine shell is used for feeding film materials and providing a printing and curing environment, the inkjet machine is used to spray ink into the inking component, the inking component is used to evenly apply ink to the surface of the graphic part of the rotary stamping component, the rotary stamping component is used to stamp the graphic part covered with ink onto the surface of the film material, the tension expansion component is used to increase the surface tension of the film material during stamping, and the curing component uses ultraviolet rays to quickly convert the ink into a solid state.

[0007] Preferably, the rotary stamping assembly includes a DC motor, a bidirectional screw, a lifting bracket 1, a lifting bracket 2, a rotating shaft, a fixed shaft, a stamping plate and a supporting plate, the DC motor is threadedly connected to the top of the printing and curing machine housing, one end of the bidirectional screw is fixedly connected to the output end of the DC motor, the lifting bracket 1 and the lifting bracket 2 are threadedly sleeved on the outside of the bidirectional screw, the rotating shaft is rotatably connected to the outside of the lifting bracket 1, the fixed shaft is fixedly connected to the outside of the lifting bracket 2, one end of the supporting plate is fixedly connected to the outside of the fixed shaft, and one end of the stamping plate is fixedly connected to the outside of the rotating shaft.

[0008] Preferably, the tension expansion assembly includes a transverse slide rail, a sliding bracket, a square rubber pad, a pushing cylinder and a push rod, the transverse slide rail is fixedly connected to both sides of the lifting bracket one and the lifting bracket two, the sliding bracket is slidably connected to the inner side of the transverse slide rail, the square rubber pad is adhesively connected to one side of the transverse slide rail, the output end of the pushing cylinder is fixedly connected to one end of the push rod, and the outer side of the push rod is fixedly connected to the surface of the sliding bracket.

[0009] Preferably, the inking assembly includes an ink cartridge, an ink pump, a connecting tube, an ink storage tank, a fixed scraper and an ink roller, the ink pump is fixedly connected to the outside of the connecting tube, the two ends of the connecting tube are respectively fixedly connected to the ink cartridge and one end of the inkjet machine, the ink storage tank is fixedly connected to the housing of the printing and curing machine at the lower end of the inkjet machine, the fixed scraper is fixedly connected to the inner side of the top of the ink storage tank, and the surface of the ink roller is in conflict with the tip of the fixed scraper.

[0010] Preferably, the curing assembly includes an LED curing lamp, a lamp holder and a protective cover, the protective cover is fixedly connected to the surface of the printing and curing machine housing, the lamp holder is threadedly connected to the inner side of the top of the protective cover, and the LED curing lamp is threadedly connected to the inner side of the lamp holder.

[0011] Preferably, support plates, power cylinders and guide rods are also provided on both sides of the ink roller. The power cylinder is fixedly connected to the inner side of the top of the printing and curing machine housing, and the guide rod is fixedly connected to the outer side of the output end of the power cylinder. The support plate is sleeved on the outer side of the ink roller, and the surface of the support plate is fixedly connected to one end of the guide rod.

[0012] Preferably, a sealing cover and a stepper motor 1 are further provided on one side of the ink roller, the sealing cover is fixedly connected to one side of the support plate, and the output end of the stepper motor 1 is fixedly connected to one end of the ink roller.

[0013] Preferably, a stepper motor 2 is further provided on the inner side of the lifting bracket 1, and an output end of the stepper motor 2 is fixedly connected to the inner side of the rotating shaft.

[0014] Preferably, a sliding groove and a sliding sheet with mutually matching sizes are further provided at the connection between the transverse sliding rail and the sliding bracket.

[0015] Preferably, a conveying roller is fixedly connected to one side of the housing of the printing and curing machine close to the LED curing lamp, and the conveying roller is located obliquely below the LED curing lamp.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, two sets of square rubber pads that can move up and down are added to the device, so that when the stamping plate cooperates with the supporting plate to stamp the film, the two sets of square rubber pads can simultaneously stretch the film outward, thereby expanding the surface tension of the film material, so that the ink can cooperate with the LED curing lamp to stand firmly on the film surface, thereby improving the printing curing quality.

[0017] 2. In the present invention, the ink storage box and ink roller of the device are located obliquely above the platen, and cooperate with the rotatable platen, so that the inking and stamping processes can be completed and carried out on one side of the printing and curing machine housing, and the structure is compact.

[0018] 3. In the present invention, the conveying rollers and curing components arranged on the outside of the printing and curing machine housing are staggered in an up-and-down manner. When the film after printing is output to the outside of the printing and curing machine housing, it will first be irradiated by ultraviolet rays from a group of LED curing lamps, thereby curing into a film in a short time, thereby enhancing the adhesion performance of the ink and preventing the ink from dispersing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional view of the housing of the printing and curing integrated machine in the present invention; Figure 3 It is a distribution diagram of the lifting bracket 1 and the lifting bracket 2 in the present invention; Figure 4 It is a schematic diagram of the structure of the fixed scraper and ink roller in the present invention; Figure 5 is a distribution diagram of the stepping motor 1 in the present invention; Figure 6 It is a diagram showing the embossing effect of the embossing assembly in the present invention; Figure 7 This is a diagram showing the rotation effect of the embossing plate in the present invention; Figure 8 It is a schematic diagram of the structure of the curing component in the present invention.

[0020] In the figure: 1. Printing and curing machine housing; 2. Inkjet machine; 3. Tension expansion assembly; 4. Inking assembly; 5. Rotary stamping assembly; 6. Curing assembly; 7. DC motor; 8. Bidirectional screw; 9. Lifting bracket 1; 10. Lifting bracket 2; 11. Rotating axis; 12. Fixed axis; 13. Stamping plate; 14. Support plate; 15. Horizontal slide rail; 16. Sliding bracket; 17. Square rubber pad; 18. Push cylinder; 19. Push rod; 20. Ink cartridge; 21. Ink pump; 22. Connecting pipe; 23. Ink storage box; 24. Fixed scraper; 25. Ink roller; 26. LED curing lamp; 27. Lamp holder; 28. Protective cover; 29. ​​Support plate; 30. Power cylinder; 31. Guide rod; 32. Sealing cover; 33. Stepping motor 1; 34. Stepping motor 2; 35. Slide; 36. Slide; 37. Conveying roller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-8An LED-UV printing and curing device is shown: comprising a printing and curing machine housing 1, an inkjet machine 2, a tension expansion component 3, an inking component 4, a rotary stamping component 5 and a curing component 6, wherein the inkjet machine 2 is threadedly connected to the top of the printing and curing machine housing 1, the inking component 4 is fixedly connected to the inside of the printing and curing machine housing 1, the rotary stamping component 5 is movably connected to the inside of the printing and curing machine housing 1, the tension expansion component 3 is slidably connected to both sides of the rotary stamping component 5, and the curing component 6 is fixedly connected to the outside of the printing and curing machine housing 1; The shell 1 of the printing and curing integrated machine is used for feeding film materials and providing a printing and curing environment. The inkjet machine 2 is used to spray ink into the inking component 4. The inking component 4 is used to evenly apply the ink to the surface of the graphic part of the rotary stamping component 5. The rotary stamping component 5 is used to stamp the graphic part covered with ink onto the surface of the film material. The tension expansion component 3 is used to increase the surface tension of the film material during stamping. The curing component 6 uses ultraviolet rays to quickly convert the ink into a solid state.

[0023] The device is provided with two groups of square rubber pads 17 that can move up and down, so that when the embossing plate 13 cooperates with the supporting plate 14 to emboss the film, the two groups of square rubber pads 17 can simultaneously stretch the film outward, thereby expanding the surface tension of the film material, so that the ink can cooperate with the LED curing lamp 26 to stand firmly on the surface of the film, thereby improving the printing and curing quality; the ink storage box 23 and the ink roller 25 of the device are located obliquely above the embossing plate 13, and cooperate with the rotatable embossing plate 13, so that the inking and embossing processes can be completed and carried out on one side of the printing and curing machine housing 1, and the structure is compact, and the conveying rollers 37 and the curing components 6 arranged on the outside of the printing and curing machine housing 1 are staggered in an up and down manner. When the film after the embossing is completed is output to the outside of the printing and curing machine housing 1, it will be irradiated by the ultraviolet rays of a group of LED curing lamps 26 for the first time, so that it can be cured into a film in a short time, thereby enhancing the adhesion performance of the ink and preventing the ink from dispersing.

[0024] The rotary stamping assembly 5 includes a DC motor 7, a bidirectional screw 8, a lifting bracket 1 9, a lifting bracket 2 10, a rotating shaft 11, a fixed shaft 12, a stamping plate 13 and a supporting plate 14. The DC motor 7 is threadedly connected to the top of the printing and curing machine housing 1, one end of the bidirectional screw 8 is fixedly connected to the output end of the DC motor 7, the lifting bracket 1 9 and the lifting bracket 2 10 are threadedly sleeved on the outside of the bidirectional screw 8, the rotating shaft 11 is rotatably connected to the outside of the lifting bracket 1 9, the fixed shaft 12 is fixedly connected to the outside of the lifting bracket 2 10, one end of the supporting plate 14 is fixedly connected to the outside of the fixed shaft 12, and one end of the stamping plate 13 is fixedly connected to the outside of the rotating shaft 11.

[0025] The tension expansion assembly 3 includes a transverse slide rail 15, a sliding bracket 16, a square rubber pad 17, a pushing cylinder 18 and a push rod 19. The transverse slide rail 15 is fixedly connected to both sides of the lifting bracket 1 9 and the lifting bracket 2 10. The sliding bracket 16 is slidably connected to the inner side of the transverse slide rail 15. The square rubber pad 17 is adhesively connected to one side of the transverse slide rail 15. The output end of the pushing cylinder 18 is fixedly connected to one end of the push rod 19, and the outer side of the push rod 19 is fixedly connected to the surface of the sliding bracket 16.

[0026] The inking assembly 4 includes an ink cartridge 20, an ink pump 21, a connecting tube 22, an ink storage box 23, a fixed scraper 24 and an ink roller 25. The ink pump 21 is fixedly connected to the outside of the connecting tube 22. The two ends of the connecting tube 22 are respectively fixedly connected to the ink cartridge 20 and one end of the inkjet machine 2. The ink storage box 23 is fixedly connected to the printing and curing machine housing 1 at the lower end of the inkjet machine 2. The fixed scraper 24 is fixedly connected to the inner side of the top of the ink storage box 23. The surface of the ink roller 25 conflicts with the tip of the fixed scraper 24.

[0027] The curing assembly 6 includes an LED curing lamp 26, a lamp holder 27 and a protective cover 28. The protective cover 28 is fixedly connected to the surface of the printing and curing machine housing 1, the lamp holder 27 is threadedly connected to the inner side of the top of the protective cover 28, and the LED curing lamp 26 is threadedly connected to the inner side of the lamp holder 27.

[0028] Support plates 29, power cylinders 30 and guide rods 31 are also provided on both sides of the ink roller 25. The power cylinder 30 is fixedly connected to the inner side of the top of the printing and curing machine housing 1, and the guide rod 31 is fixedly connected to the outer side of the output end of the power cylinder 30. The support plate 29 is sleeved on the outer side of the ink roller 25, and the surface of the support plate 29 is fixedly connected to one end of the guide rod 31.

[0029] A sealing cover 32 and a stepping motor 33 are also provided on one side of the ink roller 25 . The sealing cover 32 is fixedly connected to one side of the support plate 29 , and the output end of the stepping motor 33 is fixedly connected to one end of the ink roller 25 .

[0030] A second stepping motor 34 is also provided on the inner side of the lifting bracket 1 9 , and the output end of the second stepping motor 34 is fixedly connected to the inner side of the rotating shaft 11 .

[0031] A sliding groove 35 and a sliding sheet 36 whose sizes match each other are also provided at the connection between the transverse sliding rail 15 and the sliding bracket 16 .

[0032] A conveying roller 37 is fixedly connected to one side of the printing and curing machine housing 1 close to the LED curing lamp 26 . The conveying roller 37 is located obliquely below the LED curing lamp 26 .

[0033] Working principle: Before using the device, the ink with good proportion can be poured into the ink cartridge 20, and the cover is closed. One end of the film is pulled through the internal guide roller, and then passes through the gap between the lifting bracket 1 9 and the lifting bracket 2 10, and finally sent out to the outside of the printing and curing machine housing 1 through multiple sets of conveying rollers 37. During this process, the upper ink pump 21 can be started, and the ink inside the ink cartridge 20 enters the inkjet machine 2 from the connecting pipe 22. The inkjet machine 2 prints the ink evenly on the ink roller 25 and controls the thickness and uniformity of the ink. The excess ink will be stored in the ink storage box 23. After the ink roller 25 is inked, the outer power cylinder 30 is started, and its output end pulls the guide rod 31, and the guide rod 31 pulls the support plate 29 and pulls the ink roller 25 to move in the horizontal direction of the lifting bracket 1 9. At this time, Start the DC motor 7 on the top, the DC motor 7 drives the bidirectional screw 8, and the two sets of bidirectional screws 8 cooperate with the lifting bracket 1 9 and the lifting bracket 2 10 to move to both sides, so that the lifting bracket 1 9 is close to the ink roller 25, and then start the inner stepper motor 2 34, the stepper motor 2 34 drives the rotating shaft 11 to rotate, and the rotating shaft 11 drives the outer platen 13 to rotate, so that the pattern surface of the platen 13 is flipped to the upper end, and at the same time, the stepper motor 1 33 on the inside of the sealing cover 32 is electrically started, and the stepper motor 1 33 drives the ink roller 25 to rotate, and the ink roller 25 keeps rotating while moving horizontally, and the fixed scraper 24 can scrape off excess ink, and the rubber layer of the ink roller 25 evenly coats the ink on the pattern surface of the platen 13 under the effect of rotation, completing the inking operation. Then, the DC motor 7 is reversed to bring the lifting bracket 1 9 and the lifting bracket 2 10 closer together until the pattern surface of the embossing plate 13 and the supporting plate 14 are attached to and firmly pressed against the film, and at the same time, the pushing cylinder 18 is started, and its output end pushes the sliding bracket 16 through the push rod 19, and the sliding bracket 16 drives the square rubber pad 17 attached to the film to move outward, and the two sets of bidirectionally arranged square rubber pads 17 contact the film and stretch outward, thereby increasing the surface tension of the film and improving the printing quality. When the printing is completed, since the conveying rollers 37 and the curing components 6 arranged on the outside of the printing and curing machine housing 1 are arranged in an up-and-down staggered manner, the film after the printing is completed will be irradiated by the ultraviolet rays of a group of LED curing lamps 26 when it is output to the outside of the printing and curing machine housing 1, so that it is cured into a film in a short time, thereby enhancing the adhesion performance of the ink and preventing the ink from dispersing.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An LED-UV printing and curing device, characterized in that: The invention comprises a printing and curing machine housing (1), an inkjet machine (2), a tension expansion component (3), an inking component (4), a rotary stamping component (5) and a curing component (6), wherein the inkjet machine (2) is threadedly connected to the top of the printing and curing machine housing (1), the inking component (4) is fixedly connected to the inside of the printing and curing machine housing (1), the rotary stamping component (5) is movably connected to the inside of the printing and curing machine housing (1), the tension expansion component (3) is slidably connected to both sides of the rotary stamping component (5), and the curing component (6) is fixedly connected to the outside of the printing and curing machine housing (1); The printing and curing integrated machine housing (1) is used for feeding film materials and providing a printing and curing environment; the inkjet machine (2) is used for spraying ink into the interior of the inking component (4); the inking component (4) is used for evenly applying ink to the surface of the graphic part of the rotary stamping component (5); the rotary stamping component (5) is used for stamping the graphic part covered with ink onto the surface of the film material; the tension expansion component (3) is used for increasing the surface tension of the film material during stamping; and the curing component (6) uses ultraviolet rays to quickly convert the ink into a solid state.

2. The LED-UV printing and curing device according to claim 1, characterized in that: The rotary stamping assembly (5) comprises a DC motor (7), a bidirectional screw (8), a lifting bracket 1 (9), a lifting bracket 2 (10), a rotating shaft (11), a fixed shaft (12), a stamping plate (13) and a supporting plate (14); the DC motor (7) is threadedly connected to the top of the housing (1) of the printing and curing machine; one end of the bidirectional screw (8) is fixedly connected to the output end of the DC motor (7); the lifting bracket 1 (9) and the lifting bracket 2 (10) are threadedly sleeved on the outside of the bidirectional screw (8); the rotating shaft (11) is rotatably connected to the outside of the lifting bracket 1 (9); the fixed shaft (12) is fixedly connected to the outside of the lifting bracket 2 (10); one end of the supporting plate (14) is fixedly connected to the outside of the fixed shaft (12); and one end of the stamping plate (13) is fixedly connected to the outside of the rotating shaft (11).

3. The LED-UV printing and curing device according to claim 2, characterized in that: The tension expansion assembly (3) comprises a transverse slide rail (15), a sliding bracket (16), a square rubber pad (17), a pushing cylinder (18) and a push rod (19), wherein the transverse slide rail (15) is fixedly connected to both sides of the lifting bracket 1 (9) and the lifting bracket 2 (10), the sliding bracket (16) is slidably connected to the inner side of the transverse slide rail (15), the square rubber pad (17) is adhesively connected to one side of the transverse slide rail (15), the output end of the pushing cylinder (18) is fixedly connected to one end of the push rod (19), and the outer side of the push rod (19) is fixedly connected to the surface of the sliding bracket (16).

4. The LED-UV printing and curing device according to claim 1, characterized in that: The inking assembly (4) comprises an ink cartridge (20), an ink pump (21), a connecting tube (22), an ink storage box (23), a fixed scraper (24) and an ink roller (25); the ink pump (21) is fixedly connected to the outside of the connecting tube (22); two ends of the connecting tube (22) are respectively fixedly connected to the ink cartridge (20) and one end of the inkjet machine (2); the ink storage box (23) is fixedly connected to the lower end of the inkjet machine (2) on the housing (1) of the printing and curing machine; the fixed scraper (24) is fixedly connected to the inner side of the top of the ink storage box (23); and the surface of the ink roller (25) is in contact with the tip of the fixed scraper (24).

5. The LED-UV printing and curing device according to claim 1, characterized in that: The curing assembly (6) comprises an LED curing lamp (26), a lamp holder (27) and a protective cover (28); the protective cover (28) is fixedly connected to the surface of the printing and curing machine housing (1); the lamp holder (27) is threadedly connected to the inner side of the top of the protective cover (28); and the LED curing lamp (26) is threadedly connected to the inner side of the lamp holder (27).

6. The LED-UV printing and curing device according to claim 4, characterized in that: A support plate (29), a power cylinder (30) and a guide rod (31) are also provided on both sides of the ink roller (25); the power cylinder (30) is fixedly connected to the inner side of the top of the housing (1) of the printing and curing machine; the guide rod (31) is fixedly connected to the outer side of the output end of the power cylinder (30); the support plate (29) is sleeved on the outer side of the ink roller (25), and the surface of the support plate (29) is fixedly connected to one end of the guide rod (31).

7. The LED-UV printing and curing device according to claim 6, characterized in that: A sealing cover (32) and a stepping motor (33) are also provided on one side of the ink roller (25); the sealing cover (32) is fixedly connected to one side of the support plate (29); and the output end of the stepping motor (33) is fixedly connected to one end of the ink roller (25).

8. The LED-UV printing and curing device according to claim 2, characterized in that: A second stepping motor (34) is also provided on the inner side of the lifting bracket (9), and an output end of the second stepping motor (34) is fixedly connected to the inner side of the rotating shaft (11).

9. The LED-UV printing and curing device according to claim 3, characterized in that: A sliding groove (35) and a sliding sheet (36) having sizes matching each other are also provided at the connection between the transverse sliding rail (15) and the sliding bracket (16).

10. The LED-UV printing and curing device according to claim 5, characterized in that: A conveying roller (37) is also fixedly connected to a side of the printing and curing machine housing (1) close to the LED curing lamp (26); the conveying roller (37) is located obliquely below the LED curing lamp (26).

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