CN116985548A - Curing method and device for coating with different thickness - Google Patents
Curing method and device for coating with different thickness Download PDFInfo
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- CN116985548A CN116985548A CN202310969424.8A CN202310969424A CN116985548A CN 116985548 A CN116985548 A CN 116985548A CN 202310969424 A CN202310969424 A CN 202310969424A CN 116985548 A CN116985548 A CN 116985548A
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- 238000001723 curing Methods 0.000 title claims abstract description 187
- 238000000576 coating method Methods 0.000 title claims abstract description 28
- 239000011248 coating agent Substances 0.000 title claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 238000007641 inkjet printing Methods 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims description 50
- 239000000463 material Substances 0.000 claims description 37
- 238000005286 illumination Methods 0.000 claims description 20
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
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Abstract
The application relates to the technical field of coating curing, in particular to a curing method and device for a coating with different thickness. The curing method comprises the following steps of S1: performing ink-jet printing on a substrate to form a continuous image layer; s2: dividing the continuous layer into areas with different curing speeds; s3: the energy source acts on the successive layers to cause the solute in the successive layers to migrate from the fast curing region to the slow curing region. The curing device comprises: a curing heat source for providing thermal energy; the support plate is used for bearing an object to be cured, the support plate is arranged in the heating range of the curing heat source, and at least two curing areas with different heat conducting properties are arranged on the support plate. The application can form the pattern layer morphology with thickness difference through the curing device, and the thickness is uniformly changed.
Description
Technical Field
The application relates to the technical field of coating curing, in particular to a curing method and device for a coating with different thickness.
Technical Field
With the gradual development of Light-emitting diode (LED) Light source technology, the application of LED lamps as point Light sources or the application of multiple groups of LEDs as line/surface Light sources is more and more widespread, but LEDs are single-point Light sources, and after being regularly arranged in an array or irregularly arranged randomly, the Light intensity of the whole line/surface is difficult to be ensured to be consistent after being combined due to a certain interval inevitably existing between the LED Light sources, which brings adverse experience to the application of the LED lamps in the new energy field.
Therefore, the reflectivity of different positions on the substrate side of the LED light source needs to be regulated, or a light barrier with regional difference in transmittance is added on the light emitting side of the LED to realize the uniformity of the final light intensity. However, the uniformity of the light intensity is realized by the reflecting layer or the light blocking layer, and the essence is that a coating layer with different reflectivity in different position areas needs to be manufactured.
In the prior art, in the coating printing stage, the coating with the difference in reflectivity is prepared by controlling the printing thickness of the coating in each area, and a common coating curing device only relates to curing the coating through high temperature, so that the preparation of the coating with the difference in reflectivity cannot be realized in the curing step.
Disclosure of Invention
In order to solve the technical problems, the inventor analyzes the known coating forming technology in the prior art, searches for the reasons for the technical problems, further optimizes the curing method of the coating, designs and improves the curing device, and can realize the preparation of the coating with different reflectivity through the curing step.
The specific technical scheme is as follows:
a method of curing a differential thickness coating, comprising:
s1: performing ink-jet printing on a substrate, wherein an overlapping area exists between ink points formed by each printed ink drop and adjacent ink points so as to form a continuous image layer;
s2: dividing the continuous layer into areas with different curing speeds;
s3: an energy source acts on the successive layers to cause a solute in the successive layers to migrate from a fast curing region to a slow curing region.
According to the technical scheme, the difference of the concentration of the solute in the ink is realized through the difference of the curing speeds, and the migration of the solute in curing is realized under the action of the concentration difference, so that the coating with the differential thickness is obtained.
Preferably, the energy source is a heat source, and the areas with different curing speeds are formed by the distribution of the materials with different thermal conductivities.
In the technical scheme, in the region with higher heat conductivity, the volatilization speed of the ink solvent is also higher, and the concentration of the solute is relatively higher and can migrate to the region with lower heat conductivity.
Further preferably, the substrate curing area is formed by arranging staggered materials with the heat conductivity of 10-20W/m.K on the carrier plate, and the substrate curing area can be made of stainless steel materials; optionally, the surface of the cross-joint of the matrix curing area is provided with an area with the highest curing speed, which is formed by a material with the heat conductivity of 121-151W/m.k, and the matrix curing area is made of an aluminum alloy material, and the grid formed by the cross-joint is a hollow space, or is provided with a material with the heat conductivity of less than 1W/m.k, and the matrix curing area is made of a resin material, so that the area with the lowest curing speed is formed.
Preferably, the energy source is a light source, and the irradiation light irradiates the distribution of the area to form an area with differentiated curing speed.
In the technical scheme, in the area irradiated by the radiant light, under the action of the light, the volatilization speed of the ink solvent is higher, and the concentration of the solute is relatively higher, so that the ink solvent can migrate to the area which is not irradiated by the light or is less irradiated by the light.
Further preferably, the irradiation area of the radiation light is defined by a lamp housing provided with a light adjustment hole.
Preferably, the method further comprises the step of introducing ink solvent vapor into the cured region.
The technical scheme can be used together with any technical scheme, and can provide steam of the ink solvent to ensure consistent volatilization rate in the ink curing process, so that the coffee ring effect is reduced.
Further preferably, the ink solvent vapor is saturated vapor.
A curing apparatus for a coating of varying thickness comprising:
a curing heat source for providing thermal energy;
the support plate is used for bearing an object to be cured, the support plate is arranged in the heating range of the curing heat source, and at least two curing areas with different heat conducting properties are arranged on the support plate.
The curing method corresponding to the technical scheme comprises the following steps: when the printing ink is cured, solutes in the printing ink of the layer are collected at the position of the material with lower heat conduction coefficient under the action of concentration difference, so that a cambered area on the printing ink is formed, and the cambered degree of the cambered area is at least controlled by the difference of heat conductivity among the materials and at least one factor of the property of the printing ink material and the curing temperature.
The principle of the technical scheme is as follows: the material with high heat conductivity coefficient can transfer heat in the curing device to the corresponding ink layer more quickly and more, in the ink of the layer, the solvent volatilizes more quickly, the concentration of the solute is higher relative to other areas, under the driving action of the concentration difference of the solute, the solute diffuses towards the area with lower concentration, so that a single layer with different thickness (solute content) is formed, the position of the material with high heat conductivity coefficient can be set according to actual requirements, and the thickness distribution of the single layer is adjusted.
Preferably, the carrier plate comprises a staggered grid-like substrate, which itself constitutes one of the curing areas.
Further preferably, the surface of the staggered part of the substrate is provided with a high-energy curing part, the high-energy curing part forms a curing area with higher heat conduction performance than other parts on the carrier plate, and the high-energy curing part is helpful for forming a smooth arched pattern layer surface morphology.
Further preferably, the grid formed by interlacing the base material is provided with a low-energy curing part, and the low-energy curing part forms a curing area with lower heat conduction performance than other parts on the carrier plate.
The base material is selected from stainless steel materials with heat conductivity of 10-20W/m.K, the high-energy curing part is selected from aluminum alloy materials with heat conductivity of 121-151W/m.K, and the low-energy curing part is a hollow area or is filled with resin materials.
Preferably, a plurality of negative pressure fixing through holes are arranged on the bearing area of the carrier plate at intervals, and negative pressure suction is used for fixing the object to be solidified on the carrier plate through the negative pressure fixing through holes.
Preferably, the curing device further comprises:
a curing light for providing irradiated light;
the lamp shade is used for limiting a light irradiation area, the lamp shade is arranged between the curing lamp and the carrier plate, an illumination adjusting hole is formed in the lamp shade, and the illumination adjusting hole opens a light irradiation path of the curing lamp;
the curing method corresponding to the technical scheme comprises the following steps: placing a substrate printed with a pattern layer below a curing lamp and a lamp shade thereof in a curing device, wherein the lamp shade part blocks illumination of the curing lamp, and realizing migration of solutes in ink in the curing process by enabling materials in different areas of the carrier plate to correspond to different curing illumination intensities so as to form a single pattern layer with different thickness;
the principle of the technical scheme is as follows: the layer that the curing light illumination was reached absorbs illumination energy more easily, and solvent volatilizes faster in the printing ink of here layer, and the concentration of solute is higher for other regions, and under the drive effect of solute concentration difference, the solute is towards its lower concentration region diffusion, and then forms the single layer that thickness (solute content) is different to can set up the position that the illumination was located according to actual demand, adjust the thickness distribution of single layer.
The flexibility of pattern shape adjustment is greater in the technical scheme, and a single pattern layer with various requirements can be realized only by changing the area and the shape of the cured light in the lampshade.
Preferably, the lamp shade further comprises an adjusting mechanism for adjusting the vertical position of the lamp shade so as to assist in adjusting the illumination range.
Preferably, the curing device further comprises:
an ink solvent storage tank for storing a solvent for the ink;
and the steam gas circuit is used for releasing steam generated after the ink solvent storage tank is heated into the curing area, and the steam gas circuit is communicated with the ink solvent storage tank through a flow regulating valve.
Further preferably, the ink solvent storage tank is disposed at a distance from the curing heat source, and the ink solvent storage tank is heated by an independent heat source.
Preferably, the steam gas circuit is provided with solvent steam outlets, and the solvent steam outlets are uniformly and alternately arranged on the upper surface of the steam gas circuit.
The curing method of the technical scheme comprises the following steps: and (3) introducing steam of ink solvent with stable concentration into the curing area, particularly introducing steam of ink solvent with saturated concentration into the curing area, so as to ensure consistent volatilization rate in the ink curing process in a mode of providing saturated steam of the ink solvent, and further reduce the generation of a coffee ring effect, wherein the coffee ring effect refers to that: after liquid coherence, the solid phase substance in the liquid phase substance can leave a stain, the stain is unevenly distributed, and the edge part is more than the middle part, so that the phenomenon of annular spots is formed.
In summary, the technical scheme of the application has the following main beneficial effects:
compared with the prior art, the application can form the pattern layer morphology with thickness difference through the curing device, and the thickness is uniformly changed.
In addition, the curing device provides a curing mode capable of adjusting the illumination range, the flexibility of pattern shape adjustment is higher, and a single pattern layer with various requirements can be realized by only changing the area and the shape of the curing light in the lampshade.
Simultaneously, the curing device is used for introducing steam of ink solvent with stable concentration into a curing area, so that the volatilization rate in the ink curing process is ensured to be consistent, and the generation of a coffee ring effect is further reduced.
Further or more detailed benefits will be described in connection with specific embodiments.
Drawings
FIG. 1 is a schematic diagram of a curing method according to an embodiment of the present application;
FIG. 2 is a schematic view showing the internal structure of the curing apparatus according to example 1;
FIG. 3 is a schematic view of a carrier structure of the curing apparatus according to the embodiment 1;
FIG. 4 is an enlarged view of the area A structure of FIG. 2;
FIG. 5 is a schematic view of the surface morphology of the solidifying device of example 1 after solute migration;
FIG. 6 is a schematic view of the vertical cross-sectional morphology of the surface layer after solute migration;
FIG. 7 is a schematic view of the curing apparatus according to example 2;
FIG. 8 is a schematic view of a curing apparatus according to example 2 at another angle;
fig. 9 is a schematic distribution diagram of an ink solvent tank, a vapor gas circuit, and a flow rate regulating valve in the curing apparatus according to example 3;
FIG. 10 is a topography of an ink stick after the introduction of a concentration-stabilized ink solvent vapor;
FIG. 11 is a schematic view of the morphology of a "coffee ring" formed by curing an ink stick under a conventional atmosphere;
in the figure:
3.1-curing heat source, 3.2-carrier plate, 3.21-high energy curing part, 3.22-low energy curing part, 3.23-negative pressure fixing through hole, 3.3-curing lamp, 3.4-lampshade, 3.41-illumination adjusting hole, 3.5-ink solvent storage tank, 3.6-steam gas circuit, 3.61-solvent steam outlet, 3.7-flow adjusting valve and 3.8-base plate.
Detailed Description
In order to make the objects, features and advantages of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
Unless specifically stated or limited otherwise, the terms "connected," "affixed," "disposed" and "configured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically, directly or indirectly through an intermediate medium, or internally. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The core technical problems faced by the technical scheme of the embodiment of the application are derived from the deep knowledge of the inventor on the technical problems in the prior art.
Therefore, on the basis of the deep knowledge of the technical problem, how to realize uniform surface light emission in each scene, especially in the application scene of new energy is a technical problem to be solved by the inventor.
Meanwhile, the expansion of the process application range for preparing different types of coatings is also a technical problem which the inventor intends to solve synchronously.
The examples are detailed below:
example 1:
referring to fig. 1, fig. 1 is a schematic diagram of a curing method according to an embodiment of the present application, where the curing method is:
s1: performing ink-jet printing on a substrate, wherein an overlapping area exists between ink points formed by each printed ink drop and adjacent ink points so as to form a continuous image layer;
s2: the method comprises the steps that staggered stainless steel materials are arranged on a carrier plate in a crisscross manner to form one of solidification areas, an aluminum alloy material area is arranged on the surface of the staggered position of the stainless steel materials, solidification speed of the aluminum alloy material area is faster than that of the area where the stainless steel is located, and the grid position formed by the staggered position of the stainless steel materials is a hollow space or is provided with a resin material, and solidification speed of the resin material is slower than that of the area where the stainless steel is located;
s3: the curing heat source acts on the continuous layer to cause the solute in the continuous layer to migrate from the fast curing zone to the slow curing zone.
Referring to fig. 2 to 4, the curing device for the coating with different thickness used in the present embodiment includes a curing heat source 3.1 for providing heat energy and a carrier plate 3.2 for carrying a substrate 3.8, where the carrier plate 3.2 is disposed above the curing heat source 3.1;
wherein the curing heat source 3.1 is a heating coil;
the carrier plate 3.2 comprises criss-cross base materials which form a square grid structure, and the base materials are made of stainless steel materials with the heat conductivity of 10-20W/m.K;
in the preferred technical scheme, cross-shaped high-energy curing parts 3.21 are arranged on the surfaces of the staggered parts of the base material, and the high-energy curing parts 3.21 are made of aluminum alloy materials with heat conductivity of 121-151W/m.K;
in the preferred technical solution, the grid is provided with a low-energy curing part 3.22, the low-energy curing part 3.22 is a hollow area or is filled with a high-temperature resistant resin material, and the low-energy curing part 3.22 in this embodiment is a hollow area.
During solidification, the substrate 3.8 printed with the ink is fixed on the bearing area of the carrier plate 3.2 through a plurality of negative pressure fixing through holes 3.23 which are arranged at intervals.
During specific curing, the high-energy curing part 3.21 material with high heat conductivity coefficient and the carrier plate 3.2 can transfer heat to the corresponding layers faster and more, the solvent in the printing ink of the layers is volatilized faster, the concentration of the solute is higher relative to other areas, under the driving action of the concentration difference of the solute, the solute diffuses towards the areas with lower concentration, namely the low-energy curing part 3.22 of the square grid of the carrier plate 3.2, so that the appearance of the continuous layers is changed into a single layer with different thickness (solute content), and after the continuous layers are printed, the surface layers form a surface with continuously-changed reflectivity through solute migration after the substrate 3.8 is subjected to the curing mode.
After the coating is cured for half an hour at 80 ℃ and cured for 15min at 150 ℃, the surface appearance schematic diagram of the cured coating is shown in fig. 5, the vertical section shape of the surface appearance schematic diagram can be referred to fig. 6, fig. 6 is the vertical section appearance schematic diagram along the a or b direction in fig. 5 after the surface layer is transferred by solute, the wavy line in fig. 5 represents the outline of the layer, the pointed part of A is the area corresponding to the low-energy curing part 3.22, the film thickness of the cured ink is periodically graded and the section difference does not occur, as shown in fig. 6, the reflectivity of the whole substrate 3.8 is excessively smooth, and the obtained substrate 3.8 with the smooth transition reflection surface of the reflectivity is commonly used for Mini-LED backlight diffusion plates.
In this embodiment, the grid pattern on the carrier 3.2 may be adaptively adjusted (or the carrier 3.2 may be replaced) according to practical needs, such as a distribution structure formed by adjacent hexagons, or some materials with a thermal conductivity coefficient far smaller than that of the grid line material of the carrier 3.2 may be used for the central portion of the grid of the carrier 3.2, for example, high-temperature resistant resin materials. The elimination of the high-energy curing section 3.21 also makes it possible to produce a non-uniform pattern distribution of the finally formed continuously varying reflectivity surface. It will be appreciated that by varying the material of the carrier plate 3.2 having different thermal conductivities, the material of the ink or the temperature of curing, the degree of the corresponding cross-sectional camber, i.e. the angle θ in fig. 5, will be correspondingly varied, resulting in a substrate 3.8 of different reflectivity.
Example 2:
the curing method comprises the following steps:
s1: performing ink-jet printing on a substrate, wherein an overlapping area exists between ink points formed by each printed ink drop and adjacent ink points so as to form a continuous image layer;
s2: the method comprises the steps that a radiation light irradiation area is limited through a lampshade provided with a light irradiation adjusting hole, so that a curing speed differential area is formed, wherein the curing speed in the radiation light irradiation area is faster than that in other areas;
s3: the radiation source acts on the successive layers to cause the solute in the successive layers to migrate from the fast curing region to the slow curing region.
Referring to fig. 7 to 8, the curing device for the coating with different thickness used in the present embodiment adds a curing structure of light irradiation based on the technical scheme of embodiment 1:
in the curing device, an infrared curing lamp 3.3 is arranged above a carrier plate 3.2, a lamp shade 3.4 is arranged between the curing lamp 3.3 and the carrier plate 3.2, an illumination adjusting hole 3.41 is formed in the lamp shade 3.4, an illumination passage of the curing lamp 3.3 is opened up by the illumination adjusting hole 3.41, and the distance between the lamp shade 3.4 and the curing lamp 3.3 and the distance between the lamp shade 3.4 and a substrate 3.8 are adjustable so as to assist in adjusting the illumination range;
the adjustment mode of the interval between the lampshade 3.4 and the substrate 3.8 can be, for example:
a servo motor (also can be a linear motor) is arranged at the position of the outer shell of the curing equipment corresponding to the height of the lampshade 3.4, the servo motor drives a sliding block through a screw rod, and the sliding block is connected with the inner lampshade 3.4, so that stepless adjustment within a certain interval range can be realized;
the adjustment mode can also be as follows:
the inside of the curing device is provided with a plurality of layers of clamping groove structures with different heights, and the lampshade 3.4 is arranged on the clamping grooves with different heights according to actual process requirements so as to realize different distances between the lampshade 3.4 and the substrate 3.8.
The substrate 3.8 coated with the pattern layer is arranged on the carrier plate 3.1 and is cured below the curing lamp 3.3, and the curing conditions can be as follows: curing at 150 ℃ for 15min.
In the embodiment, the layer reached by the illumination of the curing lamp 3.3 is easier to absorb the illumination energy, the solvent in the printing ink of the layer volatilizes faster, the concentration of the solute is higher than that of other areas, under the driving action of the concentration difference of the solute, the solute diffuses towards the area with lower concentration, so that a single layer with different thickness (solute content) is formed, the position of the illumination can be set according to the actual requirement, and the thickness distribution of the single layer is adjusted; according to the technical scheme, the flexibility of pattern shape adjustment is higher, a single pattern layer with various requirements can be realized by only changing the area and the shape of the cured light in the lampshade, the heating differentiation area of the carrier plate 3.2 is not required to be adjusted, the substrate 3.8 with the reflectivity smooth transition reflection surface can be obtained, and the substrate can be generally used for a new energy Mini-LED backlight diffusion plate.
The technical scheme can expand the application field of the technical scheme of the embodiment 1, and is particularly suitable for the conditions that the pattern shape is irregular and difficult to process.
Example 3:
the curing method comprises the following steps:
s1: performing ink-jet printing on a substrate, wherein an overlapping area exists between ink points formed by each printed ink drop and adjacent ink points so as to form a continuous image layer;
s2: the method comprises the steps that a radiation light irradiation area is limited through a lampshade provided with a light irradiation adjusting hole, so that a curing speed differential area is formed, wherein the curing speed in the radiation light irradiation area is faster than that in other areas;
s3: the radiation source acts on the continuous layer to migrate solutes in the continuous layer from the fast cure zone to the slow cure zone and to introduce saturated ink solvent vapor into the cure zone during the cure process.
Referring to fig. 7 to 9, the curing device for the coating with different thickness used in the present embodiment adds a structure of introducing ink solvent vapor with stable concentration into the curing area based on the technical scheme of embodiment 2:
the curing device is internally provided with an ink solvent storage tank 3.5, a steam gas circuit 3.6 and a flow regulating valve 3.7 arranged between the ink solvent storage tank 3.5 and the steam gas circuit 3.6 besides a curing heat source 3.1 and a carrier plate 3.2;
wherein, be provided with in the printing ink solvent storage tank 3.5 with the same solvent of printing ink on the base plate 3.8, printing ink solvent storage tank 3.5 and bottom heating source 3.2 interval get away, and heat through independent heat source to convenient control, the upper surface interval of steam gas circuit 3.6 is equipped with a plurality of solvent steam outlet 3.61, and the solidification condition can be: curing at 150 ℃ for 15min.
In this embodiment, the solvent vapor outlet 3.61 is used to introduce the solvent vapor of the ink with saturated concentration into the curing area, so as to ensure the consistent volatilization rate in the ink curing process, and further reduce the occurrence of the "coffee ring" effect.
The above-mentioned "coffee ring" effect refers to: after liquid coherence, the solid phase substance in the liquid phase substance can leave a stain, the stain is unevenly distributed, and the edge part is more than the middle part, so that the phenomenon of annular spots is formed.
In addition, taking the example of the coating morphology of ink-jet printed ink sticks, the effect of the introduced ink solvent vapor with stable concentration on the coating morphology of the ink sticks is compared, referring to fig. 10 and 11:
after the ink solvent steam with stable concentration is introduced, the morphology graph of the ink block is shown in fig. 10, and fig. 11 is a schematic diagram of the morphology of a coffee ring formed by curing the same ink under a conventional atmosphere, wherein fig. 10-11 are laser altigraphs, and the length of each grid on the ordinate is: 0.0025mm, length per grid on abscissa: the distance the probe moves every 500 milliseconds;
as can be seen from a comparison of fig. 9 and fig. 10, the cured ink dots formed after the ink solvent vapor with stable concentration is introduced have a regular shape, the annular peripheral solute aggregation of coffee is not formed, the defect of uneven surface caused by shrinkage of folds is overcome, the upper surface of the cured ink dots is relatively flat, and the light reflection effect is stable.
In summary, the present application can form the pattern layer with thickness difference by the curing device itself in various ways, and the thickness is uniformly changed. Meanwhile, the curing device can introduce the steam of the ink solvent with stable concentration into the curing area, ensures the consistent volatilization rate in the ink curing process, and further reduces the generation of the coffee ring effect.
The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
While the application has been described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and additions may be made without departing from the scope of the application. Equivalent embodiments of the present application will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when considered in the light of the foregoing disclosure, and without departing from the spirit and scope of the application; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present application still fall within the scope of the technical solution of the present application.
The above examples are provided to illustrate the disclosed embodiments of the application and are not to be construed as limiting the application. In addition, many modifications and variations of the methods and compositions of the application set forth herein will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the application. While the application has been specifically described in connection with various specific preferred embodiments thereof, it should be understood that the application should not be unduly limited to such specific embodiments. Indeed, various modifications of the described modes for carrying out the application which are obvious to those skilled in the art are intended to be within the scope of the present application.
Claims (19)
1. A method of curing a coating of differential thickness comprising:
s1: performing ink-jet printing on a substrate, wherein an overlapping area exists between ink points formed by each printed ink drop and adjacent ink points so as to form a continuous image layer;
s2: dividing the continuous layer into areas with different curing speeds;
s3: an energy source acts on the successive layers to cause a solute in the successive layers to migrate from a fast curing region to a slow curing region.
2. The curing method of claim 1, wherein: the energy source is a heat source, and the area with different curing speeds is formed through the distribution of the materials with different heat conductivities.
3. The curing method according to claim 2, wherein: the substrate curing area is formed by arranging staggered materials with the heat conductivity of 10-20W/m.K on the carrier plate.
4. A curing method according to claim 3, characterized in that: the matrix curing area is formed by the space of the grid formed by interlacing or is provided with a material with the heat conductivity less than 1W/m.K so as to form the area with the slowest curing speed.
5. The curing method of claim 4, wherein: and the surface of the staggered part of the matrix curing area is provided with a material with the heat conductivity of 121-151W/m.K, so that the area with the highest curing speed is formed.
6. The curing method of claim 1, wherein: the energy source is a light source, and the irradiation light irradiation area is distributed to form an area with different curing speeds.
7. The curing method of claim 6, wherein: and the irradiation area of the radiation light is limited by a lampshade provided with the illumination regulating hole.
8. The curing method according to any one of claims 2 to 7, characterized in that: further comprising the step of introducing ink solvent vapor into the cured area.
9. The curing method of claim 8, wherein: the ink solvent vapor is saturated vapor.
10. A curing apparatus for a coating of varying thickness, comprising:
a curing heat source (3.1) for providing thermal energy;
the support plate (3.2) is used for bearing an object to be cured, the support plate (3.2) is arranged in the heating range of the curing heat source (3.1), and at least two curing areas with different heat conducting properties are arranged on the support plate (3.2).
11. The curing apparatus of claim 10, wherein: the carrier plate (3.2) comprises a grid-like substrate arranged in a staggered manner, which itself constitutes one of the curing areas.
12. The curing apparatus of claim 11, wherein: the surface of the staggered part of the base material is provided with high-energy curing parts (3.21), and the high-energy curing parts (3.21) form a curing area with higher heat conduction performance than other parts on the carrier plate (3.2).
13. The curing device of claim 11 or 12, wherein: the substrate is provided with low-energy curing parts (3.22) at grid positions formed by interlacing, and the low-energy curing parts (3.22) form curing areas with lower heat conduction performance than other parts on the carrier plate (3.2).
14. The curing apparatus of claim 10, wherein: a plurality of negative pressure fixing through holes (3.23) are formed in the bearing area of the carrier plate (3.2) at intervals.
15. The curing apparatus of claim 10, further comprising:
a curing light (3.3) for providing irradiated light;
the lamp shade (3.4) is used for limiting the region of light irradiation, lamp shade (3.4) set up in between curing lamp (3.3) and carrier plate (3.2), illumination regulation hole (3.41) have been seted up on lamp shade (3.4), illumination regulation hole (3.41) have opened the light irradiation route of curing lamp (3.3).
16. The curing apparatus of claim 15, wherein: the lampshade also comprises an adjusting mechanism for adjusting the vertical position of the lampshade (3.4).
17. The curing apparatus of claim 10, further comprising:
an ink solvent reservoir (3.5) for storing a solvent for the ink;
and the steam gas circuit (3.6) is used for releasing steam generated after the ink solvent storage tank (3.5) is heated into the curing area, and the steam gas circuit (3.6) is communicated with the ink solvent storage tank (3.5) through a flow regulating valve (3.7).
18. The curing apparatus of claim 17, wherein: the ink solvent storage tank (3.5) is arranged at a distance from the curing heat source (3.1), and the ink solvent storage tank (3.5) is heated by an independent heat source.
19. The curing apparatus of claim 17, wherein: the steam gas circuit (3.6) is provided with solvent steam outlets (3.61), and the solvent steam outlets (3.61) are uniformly and alternately arranged on the upper surface of the steam gas circuit (3.6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310969424.8A CN116985548A (en) | 2023-08-03 | 2023-08-03 | Curing method and device for coating with different thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310969424.8A CN116985548A (en) | 2023-08-03 | 2023-08-03 | Curing method and device for coating with different thickness |
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| Publication Number | Publication Date |
|---|---|
| CN116985548A true CN116985548A (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310969424.8A Pending CN116985548A (en) | 2023-08-03 | 2023-08-03 | Curing method and device for coating with different thickness |
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| Country | Link |
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| CN (1) | CN116985548A (en) |
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2023
- 2023-08-03 CN CN202310969424.8A patent/CN116985548A/en active Pending
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