Printing ink drying method, printing ink drying device and light-emitting part

Abstract

According to the printing ink drying method, the printing ink drying device and the light-emitting part, water-based printing ink on the surface of a bearing object is dried through blue light, compared with drying of the water-based printing ink through infrared rays, the water-based printing ink is dried through the blue light, the heat influence of blue light drying on the bearing object is small, and deformation or damage of the bearing object caused by high temperature can be avoided; meanwhile, the influence of blue light on the composition of the water-based ink material is small, and the original performance of the composition of the ink material is not prone to being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of ink drying, and in particular to an ink drying method, an ink drying device and a light-emitting component. Background Art

[0002] Water-based ink is widely used in packaging printing and digital inkjet printing due to its environmental protection, non-toxicity and low VOC emission characteristics.

[0003] After the water-based ink is sprayed onto the paper, the paper is placed in a drying room and irradiated with infrared light with a wavelength of 800nm-900nm to quickly evaporate the water in the water-based ink and achieve drying.

[0004] However, infrared rays have strong penetrating power and can easily penetrate water-based ink during the drying process, burning the carrier at the bottom of the water-based ink and destroying the original properties of the ink components. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an ink drying method, an ink drying device and a light-emitting element which can reduce damage to a carrier.

[0006] The first technical solution adopted by the present invention to solve the technical problem is: An ink drying method comprises using blue light to dry water-based ink on the surface of a carrier.

[0007] In the ink drying method described above, the wavelength range of the blue light is 400nm~500nm.

[0008] In the ink drying method as described above, the wavelength range of the blue light is 450nm~490nm.

[0009] In the ink drying method as described above, under the condition of equal power, the illumination temperature of the blue light is greater than the illumination temperature of the infrared light.

[0010] The second technical solution adopted by the present invention to solve its technical problem is: An ink drying device comprises: a light source module, which contains a first light-emitting mechanism for emitting blue light, and the first light-emitting mechanism can emit blue light; along the vertical direction, a carrying module is provided below the light source module, the carrying module is used to carry a carrier coated with water-based ink, and the light source module is used to dry the water-based ink on the carrier.

[0011] In the ink drying device as described above, the wavelength range of the blue light is 400nm~500nm.

[0012] In the ink drying device as described above, the light source module further comprises a second light emitting mechanism, and the second light emitting mechanism is used to emit ultraviolet rays.

[0013] The third technical solution adopted by the present invention to solve its technical problem is: A light-emitting component includes a shell having a long groove, a lamp bead group is arranged in the shell and facing the long groove, a convex lens protruding away from the lamp bead group is embedded in the long groove, and the lamp bead group emits blue light, which is emitted from the long groove through the convex lens.

[0014] As for the light-emitting element as described above, a cooling channel is provided in the housing and on the side of the lamp bead group facing away from the convex lens. A cooling module is installed in the cooling channel, and the cooling module is used to reduce the temperature of the lamp bead group.

[0015] As for the light emitting element as described above, the elongated grooves are multiple and arranged parallel to each other.

[0016] The beneficial effects of the present invention are: 1. Compared with using infrared to dry water-based ink, using blue light to dry water-based ink has less thermal impact on the carrier, which can avoid deformation or damage of the carrier caused by high temperature and extend the service life of the carrier. Blue light is not easy to damage the properties of the ink components and can well maintain the original performance.

[0017] 2. Place the carrier on the carrier module, apply water-based ink on the carrier, and the first light-emitting mechanism emits blue light to irradiate the carrier under the light source module. The blue light has a small penetrating power and can directly act on the surface of the water-based ink, drying the water-based ink while avoiding burning the carrier.

[0018] 3. The lamp bead group in the light-emitting part emits blue light, which is emitted to the surface of the carrier after passing through the convex lens to dry the water-based ink; and, under the refraction of the convex lens, the irradiation range of the blue light is expanded and evenly irradiated to the surface of the carrier, resulting in a good drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 This is the state diagram of the carrier after blue light drying; Figure 2 This is the state diagram of the load after infrared drying; Figure 3 It is a color map after infrared drying; Figure 4 It is a color picture after drying with blue light; Figure 5 It is a schematic diagram of the three-dimensional structure of the light-emitting component; Figure 6 is a bottom view of a light emitting element in an embodiment; Figure 7 is a bottom view of a light emitting member in another embodiment; Figure 8 yes Figure 5 A cross-sectional view of the light emitting element; The reference numerals are as follows: 1-housing; 2-long groove; 3-lamp bead group; 4-convex lens; 5-cooling module. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0022] Reference Figure 1 When using infrared to dry water-based ink, due to the extremely strong penetration of infrared, if the coating thickness of water-based ink is not well controlled, it is easy for the carrier to be burned by infrared while the water-based ink is being dried; not only that, some water-based inks contain acrylic resins, dispersants or azo color particles, these substances will be broken under the action of infrared energy, thus affecting the film-forming property and adhesion of the water-based ink, making the printed coating surface easy to fall off or crack, and even affecting the uniformity and stability of the ink, causing precipitation or agglomeration, and causing the pigment to decompose or discolor. Figure 3 , Figure 3 It is a printed product that uses water-based ink as a coating and is dried with infrared rays. Figure 3 After drying, the color coating is dull, discolored, the edges of the graphics are rough, details are lost, the colors are distorted, and the sense of layering is lost, which is very poor in appearance; In order to solve the above technical problems, this embodiment provides an ink drying method, which uses blue light to dry the water-based ink on the surface of a carrier.

[0023] Reference Figure 1 and Figure 2 , when the thickness of the water-based ink coating is the same and the model and type of the water-based ink used are the same, since the penetrating power of blue light is less than that of infrared light, it is difficult for blue light to penetrate or rarely penetrate the coating, thus reducing damage to the carrier; Reference Figure 3 and Figure 4 From the printing quality point of view, when the same water-based ink is used for printing on paper, the printed pattern obtained by blue light drying is closer to the original image, with bright colors, natural color transitions, clear edges between images, richer details, and more natural and three-dimensional products. This is because the penetration of blue light is not as strong as that of infrared light, and the degree of damage to pigments is less. Therefore, the quality of water-based ink prints dried with blue light is better.

[0024] exist Figure 3 and Figure 4 The water-based ink used in the printing process is purchased from the water-based ink produced by Moku Company.

[0025] It can be understood that the applicable scenarios of this method include but are not limited to digital printing, packaging printing, billboards, and poster production.

[0026] Specifically, the carrier is paper and plastic film.

[0027] In one embodiment, the wavelength range of the blue light is 400nm~500nm. If the wavelength range is less than 400nm, the energy density is small, it is difficult to dry the water-based ink, and the pigment needs to contain a photocuring agent before it can be used; if the wavelength range is greater than 500nm, the penetrability is strong, and it is easy to burn the carrier at the bottom of the water-based ink, and the carrier may burn, and the water-based ink has not been dried yet; blue light with a wavelength range of 400nm~500nm is selected, which has a high energy density and can complete large-area drying in a short time, significantly improving production efficiency, and is more suitable for industrial production, such as digital printing.

[0028] In any of the above embodiments, the wavelength range of the blue light is 450nm~490nm.

[0029] More specifically, the wavelength of the blue light is 450nm, 451nm, 452nm, 453nm, 454nm, 455nm, 456nm, 457nm, 458nm, 459nm, 460nm, 461nm, 462nm, 463nm, 464nm, 465nm, 466nm, 467nm, 468nm, 469nm, 470nm, 471nm, 472nm, 473nm, 474nm, 475nm, 476nm, 477nm, 478nm, 479nm, 480nm, 481nm, 482nm, 483nm, 484nm, 485nm, 486nm, 487nm, 488nm, 489nm, and the range formed by taking any two of the following values.

[0030] In one embodiment, the water-based ink is evenly applied on the surface of the paper with a coating thickness of 5 μm to 50 μm; the blue light source is turned on with a power density of 2 W / cm² to irradiate the paper surface for 20 seconds; after the irradiation, it is observed that the surface of the ink layer is smooth and non-sticky, and is firmly bonded to the substrate, and there are no signs of burning on the carrier at the bottom of the water-based ink. The ink layer is bright in color, the color transition is natural, the edges between images are clear, and the details are rich.

[0031] In one embodiment, the water-based ink is evenly applied on the surface of the paper with a coating thickness of 5 μm to 50 μm; the blue light source is turned on with a power density of 0.5 W / cm² to irradiate the paper surface for 60 seconds; after the irradiation, it is observed that the surface of the ink layer is smooth and non-sticky, and is firmly bonded to the substrate, and there are no signs of burning on the carrier at the bottom of the water-based ink. The ink layer is bright in color, the color transition is natural, the edges between images are clear, and the details are rich.

[0032] In one embodiment, the water-based ink is evenly applied on the surface of the paper with a coating thickness of 5μm to 50μm; the blue light source is turned on with a power density of 3W / cm² to irradiate the paper surface for 10 seconds; after the irradiation, it is observed that the surface of the ink layer is smooth and non-sticky, and is firmly bonded to the substrate, and there are no signs of burning on the carrier at the bottom of the water-based ink. The ink layer is bright in color, the color transition is natural, the edges between images are clear, and the details are rich.

[0033] In any of the above embodiments, under the condition of equal power, the illumination temperature of the blue light is greater than the illumination temperature of the infrared light.

[0034] In this embodiment, the temperature of the blue light drying water-based ink changes faster than that of the infrared drying water-based ink per unit time, which promotes the evaporation of water in the water-based ink, making the blue light drying faster than the infrared drying.

[0035] The present application also provides an ink drying device, comprising: a light source module, which contains a first light-emitting mechanism for emitting blue light; along the vertical direction, a supporting module is provided below the light source module, the supporting module is used to support a support coated with aqueous ink, and the light source module is used to dry the aqueous ink on the support.

[0036] When in use, the carrier is placed on the carrier module, and the water-based ink is coated on the carrier. The first light-emitting mechanism emits blue light to irradiate the carrier under the light source module. Compared with infrared drying, the blue light has smaller penetrating power and can directly act on the surface of the water-based ink, so that the water in the water-based ink evaporates, drying the water-based ink while avoiding burning the carrier.

[0037] More specifically, the carrier is a light-absorbing material, which helps to promote the absorption of heat from blue light, causing the surface of the carrier to heat up. The heated surface of the carrier transfers heat energy to the aqueous ink coating, accelerating the volatilization of water in the aqueous ink and speeding up the drying time. During industrial mass production, the energy consumption of the first light-emitting mechanism can be reduced, saving energy.

[0038] Specifically, in the present invention, the light-absorbing materials mentioned refer to those materials whose surfaces are coated with a coating with a darker color that can absorb more light and reflect less light. These materials usually have a lower reflectivity, making them visually appear darker. For example, these materials can be paper or plastic films, and their surfaces are attached with a coating of one or more colors such as black, dark blue, dark gray, dark purple, dark green, navy blue, brown, etc. The selection of these colors is to ensure that the material can effectively absorb light and reduce reflection, thereby achieving the purpose of light absorption.

[0039] More specifically, in one embodiment, the ink drying device includes a time control module, which establishes a communication connection with the light source module. The main function of the time control module is to accurately control the light emission duration and light emission power of the light source module. In the process of mass production, this control mechanism is particularly important because it can ensure that when multiple carriers are processed continuously, the ink coating on each carrier can obtain a uniform and consistent drying effect. In this way, production efficiency and product quality can be significantly improved, while reducing the scrap rate caused by uneven drying.

[0040] Specifically, the first light emitting mechanism is one or more of an LED blue light lamp, a laser blue light source or a blue fluorescent lamp.

[0041] In one embodiment, the blue light wavelength ranges from 400nm to 500nm.

[0042] In one embodiment, the light source module further includes a second light emitting mechanism, which is used to emit ultraviolet light. The light source module includes not only a first light emitting mechanism that can emit blue light, but also a second light emitting mechanism that can emit ultraviolet light, which expands the types of light that can be emitted by the light source module and greatly enriches the user's selection range; in actual applications, users can choose different types of light sources according to their needs and preferences. When using water-based UV ink, the second light emitting mechanism can be activated at the same time to dry the water-based UV ink at the same time.

[0043] Specifically, the first light-emitting mechanism is composed of a plurality of blue light beads, and the second light-emitting mechanism is composed of a plurality of ultraviolet light beads.

[0044] More specifically, the first light-emitting mechanism and the second light-emitting mechanism are embedded, that is, the blue light beads and the ultraviolet lamp beads are arranged alternately and at intervals. Along the length direction and the width direction, the length and width of the first light-emitting mechanism and the second light-emitting mechanism are the same, and the light source module is arranged above the carrier module. Regardless of whether the first light-emitting mechanism or the second light-emitting mechanism is turned on, the irradiation range of the two on the carrier is the same and overlaps, and there is no need to move the carrier according to the illumination position, thereby avoiding moving the carrier and affecting the uniformity of the water-based ink coating.

[0045] Reference Figures 5 to 8 A light-emitting component includes a shell 1, a long groove 2 is formed on the shell 1, a lamp bead group 3 is arranged in the shell 1 and toward the long groove 2, a convex lens 4 protruding away from the lamp bead group 3 is embedded in the long groove 2, and the lamp bead group 3 emits blue light, and the blue light is emitted from the long groove 2 through the convex lens 4.

[0046] The convex lens 4 refracts the light emitted from the lamp bead group 3, thereby expanding the illumination range of the lamp bead group 3 and preventing the light from the lamp bead group 3 from being excessively concentrated in one area, thereby dispersing the illumination range. Along the length and width of the lamp bead group 3, the drying rate of the water-based ink below the lamp bead group 3 is close to the same, and the drying uniformity is good.

[0047] It can be understood that the length of the convex lens 4 is greater than or equal to the length of the long groove 2, and the width of the convex lens 4 is greater than or equal to the width of the long groove 2, so as to ensure that the long groove 2 is completely filled with the convex lens 4, and ensure that the light emitted from the lamp bead group 3 is refracted by the convex lens 4 before being illuminated onto the carrier.

[0048] Specifically, when a cross section is made along the width direction of the long groove 2 , the cross-sectional shape of the convex lens 4 is semicircular; the refraction direction of the convex lens 4 forms an angle α of 0-90° with the illumination direction along the lamp bead group 3 .

[0049] It can be understood that the value of α is 0°, 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, 80° The range formed by any one of the following values ​​or any two of them: 7°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65°, 66°, 67°, 68°, 69°, 70°, 71°, 72°, 73°, 74°, 75°, 76°, 77°, 78°, 79°, 80°, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88°, 89°, and 90°.

[0050] In the process of light emission, not all electric energy of the lamp bead group 3 is converted into light energy, and about 50% of the electric energy is dissipated in the form of heat energy. When the temperature of the lamp bead group 3 is too high and the heat dissipation is not timely, the heat accumulation will further increase the temperature of the lamp bead group 3. Long-term use will cause the lamp bead group 3 to be damaged. At this time, the housing 1 needs to be disassembled to take out the lamp bead group 3, which will reduce the drying efficiency and affect the production progress of the drying operation. In order to solve this technical problem, this embodiment provides a solution.

[0051] In one embodiment, a cooling module 5 is provided in the housing 1 and on a side of the lamp bead group 3 facing away from the convex lens 4 , and the cooling module 5 is used to reduce the temperature of the lamp bead group 3 .

[0052] When the lamp bead group 3 generates heat during operation, the cooling module 5 takes away the heat of the lamp bead group 3, reducing the damage of the lamp bead due to overheating, extending the service life of the lamp bead group 3, reducing the frequency of removing and replacing the shell 1, and improving the efficiency of the drying operation.

[0053] Specifically, the cooling module 5 adopts an air cooling structure or a water cooling structure in the prior art.

[0054] More specifically, the long grooves 2 are multiple and arranged parallel to each other. This design can expand the lighting range of the light-emitting element and is suitable for scenes requiring large-area uniform lighting.

[0055] In one embodiment, the light emitting element is configured as the light source module, and the lamp bead group 3 can be used to emit blue light or ultraviolet light. Users can choose different types of light sources according to their needs and preferences.

[0056] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An ink drying method, characterized in that: Blue light is used to dry the water-based ink on the surface of the carrier.

2. The ink drying method according to claim 1, characterized in that: The wavelength range of the blue light is 400nm~500nm.

3. The ink drying method according to claim 1, characterized in that: The wavelength range of the blue light is 450nm~490nm.

4. The ink drying method according to any one of claims 1 to 3, characterized in that: Under the condition of equal power, the illumination temperature of the blue light is greater than the illumination temperature of the infrared light.

5. An ink drying device, characterized in that: include: A light source module, comprising a first light emitting mechanism for emitting blue light; In the vertical direction, a carrying module is provided below the light source module, the carrying module is used to carry a carrier coated with water-based ink, and the light source module is used to dry the water-based ink on the carrier.

6. The ink drying device according to claim 5, characterized in that: The blue light wavelength ranges from 400nm to 500nm.

7. The ink drying device according to claim 6, characterized in that: The light source module further includes a second light emitting mechanism, and the second light emitting mechanism is used for emitting ultraviolet rays.

8. A light emitting element, characterized in that: The invention comprises a shell (1), wherein a long groove (2) is formed on the shell (1), a lamp bead group (3) is arranged in the shell (1) and in the direction of the long groove (2), a convex lens (4) protruding in the direction away from the lamp bead group (3) is embedded in the long groove (2), and the lamp bead group (3) emits blue light, which is emitted from the long groove (2) via the convex lens (4).

9. The light emitting element according to claim 8, characterized in that: A cooling module (5) is provided in the housing (1) and located on a side of the lamp bead group (3) facing away from the convex lens (4). The cooling module (5) is used to reduce the temperature of the lamp bead group (3).

10. The light emitting element according to claim 8, characterized in that: The long grooves (2) are multiple and arranged parallel to each other.

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