DLP printing device, blade electrode preparation method based on DLP printing and blade electrode

Abstract

The invention provides a DLP printing device, a blade electrode preparation method based on DLP printing and a blade electrode. The DLP printing device comprises an arched printing platform, a first moving module and a base which are arranged in a stacked mode, the first moving module is located on the base and moves on the horizontal plane along the base, the bottom face of the arched printing platform is fixed to the first moving module, and the arched face of the arched printing platform is far away from the first moving module; the adsorption module is attached to the arched surface; the second moving module is perpendicular to the base, and the two ends of the second moving module are connected with the base and the DLP printing system correspondingly. The second moving module moves in the vertical direction to control the DLP printing system to be close to or away from the arched printing platform, and the relative distance between the DLP printing system and the arched printing platform is set. The blade is fixed to the arched printing platform, the distance between the DLP light source and the blade is controlled through the arched printing platform in the DLP printing device and the DLP printing system arranged opposite to the arched printing platform, layered curing is achieved, and non-contact printing of a circuit on the blade is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of DLP printing, and in particular to a DLP printing device, a blade electrode preparation method based on DLP printing, and a blade electrode. Background Art

[0002] DLP (Digital Light Processing) printing is one of the most popular additive manufacturing technologies. It can produce high-quality light patterns by modulating light through a micromirror array. It has been used to manufacture two-dimensional patterns or three-dimensional objects of various materials. Not only is the printing process simple, it has excellent precision and resolution, and it also has relatively high printing efficiency. Traditional additive manufacturing processes, such as inkjet printing, are also simple and easy to operate, but this type of dot printing method has a slower patterning speed than DLP's instant surface printing. Screen printing is also a surface printing method with high efficiency, but it is limited by the manufacturing technology level of the template and can only achieve a very limited resolution. In summary, DLP printing has significant advantages in the field of additive manufacturing.

[0003] However, existing DLP printing technology has very high requirements for the flatness of the printing surface, and printing on curved materials with uneven surfaces is still challenging. In addition, biological materials such as leaves are not light-transmissive, and there are certain challenges in two-dimensional patterned printing. Therefore, it is difficult to print circuits on biological materials such as leaves, which greatly limits its application in physiological monitoring. Summary of the invention

[0004] The present invention provides a DLP printing device, a method for preparing a leaf electrode based on DLP printing, and a leaf electrode, which are used to solve the defect that it is difficult to print circuits on biological materials such as leaves in the prior art, and achieve the effect of printing circuits on leaves.

[0005] The present invention provides a DLP printing device, comprising: a DLP printing system, an arched printing platform, an adsorption module, a first moving module, a second moving module and a base, wherein the DLP printing system comprises a DLP projection module and a DLP light source; The arched printing platform, the first movable module and the base are stacked, the first movable module moves along the base on a horizontal plane, the arched surface of the arched printing platform is away from the first movable module, and the adsorption module is attached to the arched surface; Both ends of the second movable module are respectively connected to the base and the DLP printing system, the DLP printing system is arranged opposite to the arched printing platform, and the second movable module moves in a vertical direction so that the DLP printing system approaches or moves away from the arched printing platform.

[0006] According to a DLP printing device provided by the present invention, the wavelength range of the DLP light source is 350nm to 410nm.

[0007] According to a DLP printing device provided by the present invention, the bottom of the arched printing platform is arranged horizontally, and the curvature of the arched surface of the arched printing platform corresponds to the curvature of the blade.

[0008] The present invention provides a method for preparing a blade electrode based on DLP printing, comprising: Preparation of light-curable printing ink based on liquid metal; Adsorbing the blade onto the arched surface of the arched printing platform by using the adsorption module of the DLP printing device described in any one of the above; Spraying the light-curable printing ink on the surface of the blade; DLP printing is performed on the top of the blade. After waiting for the set light curing time to end and completing the printing of some lines of the target pattern, the DLP light source is moved a set distance in a direction perpendicular to the base and close to the blade so that the area to be printed is within the effective working range of the DLP light source until all printing and light curing are completed to form a blade electrode with the target pattern; wherein each printing is not on the same horizontal plane.

[0009] According to a method for preparing a blade electrode based on DLP printing provided by the present invention, the method for preparing a light-curable printing ink based on liquid metal comprises: The modifier and the prepared liquid metal are mixed in an ethanol solution, and ultrasonic treatment is performed, and after the ultrasonic treatment is completed, the solution is allowed to stand for a preset time; The solution after standing is rinsed with an ethanol solvent and centrifuged to obtain a stock solution; The stock solution, dispersant, cross-linking agent and adhesive are mixed, a photoinitiator is added to the mixed solution, and the mixture is mixed under vortex to obtain the light-curable printing ink.

[0010] According to a method for preparing a blade electrode based on DLP printing provided by the present invention, the modifier is 2-HEA.

[0011] According to a method for preparing a blade electrode based on DLP printing provided by the present invention, the dispersant, the cross-linking agent and the adhesive are PEG-200 ethanol solution, ETPTA-912 ethanol solution and 2-HEA monomer respectively.

[0012] According to a method for preparing a blade electrode based on DLP printing provided by the present invention, the photoinitiator includes but is not limited to the photoinitiator TPO.

[0013] According to a method for preparing a blade electrode based on DLP printing provided by the present invention, the volume ratio of the stock solution, the dispersant, the cross-linking agent and the adhesive is A:B:C:D; wherein the value range of A is 15 to 18, the value range of B is 5 to 8, the value range of C is 5 to 8, and the value range of D is 1 to 4.

[0014] According to a method for preparing a blade electrode based on DLP printing provided by the present invention, the light curing setting time ranges from 5s to 40s.

[0015] The present invention also provides a blade electrode, wherein the blade electrode is prepared by any of the above-mentioned methods for preparing a blade electrode based on DLP printing.

[0016] The present invention provides a DLP printing device, a blade electrode preparation method based on DLP printing, and a blade electrode. In the DLP printing device, an adsorption module is attached to the arched surface of the arched printing platform for adsorbing blades. The DLP printing system is arranged relative to the arched printing platform, and DLP printing can be performed on the blades adsorbed on the arched printing platform. The DLP light source is used to project from top to bottom for photocuring printing, which solves the problem that opaque substrates such as leaves cannot be printed during the printing process. The first moving module and the second moving module respectively realize horizontal and vertical movements, which facilitates the control of placing the photocuring area within the effective working distance of the DLP light source, which solves the problem that the uneven surface affects the printing resolution, thereby obtaining the best printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the DLP printing device provided by the present invention.

[0019] Figure 2 It is a partial schematic diagram of the DLP printing device provided by the present invention.

[0020] Figure 3 It is a structural schematic diagram of a DLP printing system and an arched printing platform of a DLP printing device provided by the present invention.

[0021] Figure 4 It is a schematic flow chart of the method for preparing a blade electrode based on DLP printing provided by the present invention.

[0022] Figure 5 It is a schematic diagram of the printing process in the embodiment provided by the present invention.

[0023] Reference numerals: 110: DLP printing system; 120: arched printing platform; 130: adsorption module; 140: first moving module; 150: second moving module; 160: base; 170: blade; 111: DLP light source. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0025] Combine the following Figure 1-Figure 3 The DLP printing apparatus of the present invention is described.

[0026] Figure 1 FIG. 1 is a schematic diagram showing the structure of a DLP printing device according to an exemplary embodiment. Figures 1 to 3 As shown, the DLP printing device includes: a DLP printing system 110, an arched printing platform 120, an adsorption module 130, a first moving module 140, a second moving module 150 and a base 160, and the DLP printing system 110 includes a DLP projection module and a DLP light source 111.

[0027] The arched printing platform 120 , the first movable module 140 and the base 160 are stacked, the first movable module 140 is located on the base 160 , and the first movable module 140 moves along the base 160 on a horizontal plane, and the arched surface of the arched printing platform 120 is away from the first movable module 140 .

[0028] The adsorption module 130 is attached to the arched surface.

[0029] The second movable module 150 is perpendicular to the base, and both ends of the second movable module 150 are respectively connected to the base 160 and the DLP printing system 110. The second movable module 150 moves in a vertical direction so that the DLP printing system 110 approaches or moves away from the arched printing platform 120, thereby realizing the relative setting of the DLP printing system 110 and the arched printing platform 120.

[0030] In the embodiment of the present invention, the bottom surface of the arched printing platform 120 is fixedly connected to the first moving module 140. At the same time, the first moving module 140 is connected to the base 160. The first moving module 140 is controlled by a program to realize the movement along the Figure 2 The arched surface of the arched printing platform 120 is provided with an adsorption module 130 for adsorbing the blade 170. Figure 1 and Figure 3 As shown, the adsorption module 130 can be attached to the arched surface in the form of bonding. The arched surface adapts to the curvature of the blade 170 itself and can adsorb the blade 170.

[0031] The two ends of the second movable module 150 are respectively connected to the base 160 and the DLP light source 111. The DLP printing system 110 is arranged opposite to the arched printing platform 120. The DLP printing system 110 is located at the upper end of the arched printing platform 120, and can realize DLP printing of the blade 170 adsorbed on the arched printing platform 120. The second movable module 150 is controlled by a program to move in the vertical direction, so that the DLP printing system 110 is close to or away from the arched printing platform 120.

[0032] In the embodiment of the present invention, the blade 170 is adsorbed on the arched printing platform 120, the prepared light-curable printing ink is sprayed on the surface of the blade 170, and the DLP projection module is used to project the designed target pattern from top to bottom directly above the blade 170, and the DLP light source 111 is moved a set distance in a direction perpendicular to the base and close to the blade, so that the area to be light-cured is exactly located within the effective working distance of the DLP light source 111, and the light curing of the printed blade 170 is completed, thereby printing the target pattern. The present invention achieves layered curing by fixing the blade 170 on the adsorption-type arched printing platform 120 and controlling the distance between the DLP light source 111 and the blade 170, thereby achieving direct printing of circuits on non-planar and non-translucent blades 170 using DLP printing technology.

[0033] In the embodiment of the present invention, based on the self-designed DLP printing device, the first moving module 140 is used to adjust the position of the arched printing platform 120 in the horizontal direction, so that the blade 170 can be easily calibrated to the printing format of the DLP light source 111. The DLP light source 111 can be moved in the direction close to the arched printing platform 120 through the second moving module 150. Since the positioning accuracy of the first moving module 140 and the second moving module 150 is high, the area to be printed on the blade 170 can always be exactly located at the working distance of the DLP light source 111, which solves the problem that the uneven surface affects the printing resolution, thereby obtaining the best printing effect. At the same time, the DLP light source 111 is used to project from top to bottom for light curing printing, which solves the problem that the traditional bottom-up projection system cannot print opaque substrates such as the blade 170 during the printing process, and broadens the application scope of the DLP technology.

[0034] In an exemplary embodiment of the present invention, the wavelength range of the DLP light source 111 is 350 nm to 410 nm.

[0035] In the embodiment of the present invention, the wavelength range supported by the DLP light source 111 is from 350nm to 410nm, and light sources with more wavelengths can be used. Preferably, the wavelength of the DLP light source 111 can be selected to be 385nm.

[0036] In an exemplary embodiment of the present invention, the bottom of the arched printing platform is arranged horizontally, and the curvature of the arched surface of the arched printing platform corresponds to the curvature of the blade.

[0037] In the embodiment of the present invention, the curvature of the arched surface of the arched printing platform is set to correspond to the curvature of the blade, so that the curvatures of the two are adapted to each other, and the blade can be better fitted on the arched printing platform.

[0038] Combine the following Figure 4-Figure 5 The present invention describes a method for preparing a blade electrode based on DLP printing.

[0039] Figure 4 FIG. 1 is a flow chart showing a method for preparing a blade electrode based on DLP printing according to an exemplary embodiment. Figure 4 As shown, the method for preparing a blade electrode based on DLP printing includes steps 410 to 440, which are described in detail as follows: Step 410: preparing a light-curable printing ink based on liquid metal.

[0040] Step 420 , using the adsorption module 130 of any of the aforementioned DLP printing devices, adsorb the blade 170 onto the arched surface of the arched printing platform 120 .

[0041] Step 430 : spraying the light-curable printing ink onto the surface of the blade 170 .

[0042] Step 440, perform DLP printing on the top of the blade, wait for the set light curing time to end, and after completing the printing of some lines of the target pattern, move the DLP light source a set distance in a direction perpendicular to the base and close to the blade, so that the area to be printed is within the effective working range of the DLP light source, until all printing and light curing are completed to form a blade electrode with the target pattern; wherein each printing is not on the same horizontal plane.

[0043] In the embodiment of the present invention, a light-curable printing ink is prepared based on liquid metal, and then the blade 170 is adsorbed on the arched printing platform 120 in the DLP printing device through the adsorption module 130 in the DLP printing device, and the prepared light-curable printing ink is sprayed on the surface of the blade 170, and the DLP projection module is used to project the designed target pattern from top to bottom to the top of the blade 170, such as Figure 5 As shown, the target pattern is printed along the top of the blade 170 toward the side, and each time a partial line of the target pattern is printed, after each printing is completed, the DLP light source 111 is moved downward by a set distance close to the arched printing platform 120 in the direction perpendicular to the base, so that the area to be photocured is just located within the effective working distance of the DLP light source 111, and the photocuring of the printed blade 170 is completed. The area for photocuring is the printing area, and each printing is not in the same horizontal plane. By continuously repeating the printing and photocuring operations, the target pattern is printed. The present invention realizes layered curing by adsorbing the blade 170 on the arched printing platform 120 and controlling the distance between the DLP light source 111 and the blade 170, thereby realizing direct printing of circuits on the non-planar and non-transparent blade 170 through DLP printing technology. At the same time, the DLP light source 111 is used to project from top to bottom for photocuring printing, which solves the problem that the traditional bottom-up projection system cannot print on opaque substrates such as the blade 170 during the printing process, and broadens the application scope of the DLP technology.

[0044] By controlling the first moving module 140 and the second moving module 150, the blade 170 is placed in a suitable printing position. Printing starts from the top of the blade 170, and the light curing setting time is waited for to end, and the printing of the pattern part lines is completed. Then the DLP light source 111 is moved a set distance in the direction perpendicular to the base and close to the blade, and the above operation is repeated, so that the curing area is continuously expanded from the top to the sides until the target pattern is printed. The target pattern printed by this technology has the advantages of flexibility and conductivity, and can meet its application requirements in flexible electronic functional devices.

[0045] In an exemplary embodiment of the present invention, the light curing setting time ranges from 5s to 40s.

[0046] In the embodiment of the present invention, after each printing, the waiting time for light curing ranges from 5s to 40s, and the waiting time for each light curing can be the same or different, and the user can set it within the range of 5s to 40s as needed. Preferably, the waiting time for light curing is set to 15s.

[0047] In an exemplary embodiment of the present invention, along the vertical direction, the set distance of the DLP light source 111 moving close to the arched printing platform 120 ranges from 5 μm to 400 μm.

[0048] In the embodiment of the present invention, the moving distance of the DLP light source 111 close to the arched printing platform 120 ranges from 5 μm to 400 μm. Preferably, the set distance is set to 200 μm.

[0049] In the embodiment of the present invention, the coordinates of the arched printing platform 120 on the X-axis and Y-axis are the same as those of the DLP light source 111, and the relative distance between the initial position of the DLP light source 111 on the Z-axis and the highest point on the top of the arched printing platform 120 is 90mm-94mm.

[0050] In an exemplary embodiment of the present invention, the preparation of a light-curable printing ink based on liquid metal includes: The prepared liquid metal and the modifier are mixed in an ethanol solution, subjected to ultrasonic treatment and allowed to stand for a preset time, the solution after centrifugal standing is rinsed and centrifuged with a fresh ethanol solvent to remove unreacted reagents to obtain a stock solution, the stock solution is mixed with a dispersant, a cross-linking agent, and a binder, and then a photoinitiator is added and mixed under vortexing.

[0051] In an exemplary embodiment of the present invention, the concentration of the prepared liquid metal is 1.0 g / ml.

[0052] In an exemplary embodiment of the present invention, the ultrasonic treatment is allowed to stand for a preset time after completion; The solution after standing is rinsed with an ethanol solvent and centrifuged to obtain a stock solution; The stock solution, dispersant, cross-linking agent and adhesive are mixed, a photoinitiator is added to the mixed solution, and the mixture is mixed under vortex to obtain the light-curable printing ink.

[0053] In the embodiment of the present invention, liquid metal light-curing printing ink is prepared by using ultrasound, centrifugation and other technologies. The preset static time can be set to 10 hours.

[0054] In an exemplary embodiment of the present invention, the modifier is 2-HEA.

[0055] In the embodiment of the present invention, the modifier is 2-HEA (2-hydroxyethyl acrylate).

[0056] In an exemplary embodiment of the present invention, the dispersant, the cross-linking agent, and the binder are PEG-200 ethanol solution, ETPTA-912 ethanol solution, and 2-HEA monomer, respectively.

[0057] In the embodiment of the present invention, the dispersant, the cross-linking agent, and the adhesive are PEG (polyethylene glycol, molecular weight: 200)-ethanol solution, ETPTA (ethoxylated trimethylolpropane triacrylate, number average molecular weight: 912)-ethanol solution, and 2-HEA monomer, respectively.

[0058] In an exemplary embodiment of the present invention, the photoinitiator is a photoinitiator TPO (2,4,6-trimethylbenzoyl-diphenylphosphine oxide).

[0059] In the embodiment of the present invention, under the irradiation of the DLP light source 111, the photoinitiator monomer absorbs photons to generate active fragments, and then the photoinitiator monomer polymerizes to form a polymer, and the solution solidifies to form a circuit part.

[0060] In an exemplary embodiment of the present invention, the volume ratio of the stock solution, the dispersant, the cross-linking agent and the adhesive is A:B:C:D; wherein the value range of A is 15 to 18, the value range of B is 5 to 8, the value range of C is 5 to 8, and the value range of D is 1 to 4.

[0061] In the embodiment of the present invention, the stock solution, the dispersant, the cross-linking agent and the adhesive may be mixed in a volume ratio of 15:5:5:1.

[0062] In an exemplary embodiment of the present invention, an embodiment of the present invention further provides a blade electrode, wherein the blade electrode is manufactured by any of the aforementioned methods for manufacturing a blade electrode based on DLP printing.

[0063] In the embodiment of the present invention, the blade electrode is manufactured according to any of the above-mentioned methods for manufacturing a blade electrode based on DLP printing. The method for manufacturing a blade electrode based on DLP printing has been described above and will not be described in detail here.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A DLP printing device, characterized in that: include: A DLP printing system, an arched printing platform, an adsorption module, a first moving module, a second moving module and a base, wherein the DLP printing system includes a DLP projection module and a DLP light source; The arched printing platform, the first movable module and the base are stacked, the first movable module moves along the base on a horizontal plane, the arched surface of the arched printing platform is away from the first movable module, and the adsorption module is attached to the arched surface; Both ends of the second movable module are respectively connected to the base and the DLP printing system, the DLP printing system is arranged opposite to the arched printing platform, and the second movable module moves in a vertical direction so that the DLP printing system approaches or moves away from the arched printing platform.

2. The DLP printing device according to claim 1, characterized in that: The wavelength range of the DLP light source is from 350nm to 410nm.

3. The DLP printing device according to any one of claims 1 to 2, characterized in that: The bottom of the arched printing platform is arranged horizontally, and the curvature of the arched surface of the arched printing platform corresponds to the curvature of the blade.

4. A method for preparing a blade electrode based on DLP printing, characterized in that: include: Preparation of light-curable printing ink based on liquid metal; Adsorbing the blade onto the arched surface of the arched printing platform by the adsorption module of the DLP printing device according to any one of claims 1 to 3; Spraying the light-curable printing ink on the surface of the blade; DLP printing is performed on the top of the blade. After waiting for the set light curing time to end and completing the printing of some lines of the target pattern, the DLP light source is moved a set distance in a direction perpendicular to the base and close to the blade so that the area to be printed is within the effective working range of the DLP light source until all printing and light curing are completed to form a blade electrode with the target pattern; wherein each printing is not on the same horizontal plane.

5. The method for preparing a blade electrode based on DLP printing according to claim 4, characterized in that: The method for preparing a light-curable printing ink based on liquid metal comprises: The modifier and the prepared liquid metal are mixed in an ethanol solution, and ultrasonic treatment is performed, and after the ultrasonic treatment is completed, the solution is allowed to stand for a preset time; The solution after standing is rinsed with an ethanol solvent and centrifuged to obtain a stock solution; The stock solution, dispersant, cross-linking agent and adhesive are mixed, a photoinitiator is added to the mixed solution, and the mixture is mixed under vortex to obtain the light-curable printing ink.

6. The method for preparing a blade electrode based on DLP printing according to claim 5, characterized in that: The modifier is 2-HEA; The dispersant, cross-linking agent and adhesive are PEG-200 ethanol solution, ETPTA-912 ethanol solution and 2-HEA monomer respectively.

7. The method for preparing a blade electrode based on DLP printing according to claim 5, characterized in that: The photoinitiator includes but is not limited to photoinitiator TPO.

8. The method for preparing a blade electrode based on DLP printing according to claim 5, characterized in that: The volume ratio of the stock solution, the dispersant, the cross-linking agent and the adhesive is A:B:C:D; wherein the value range of A is 15 to 18, the value range of B is 5 to 8, the value range of C is 5 to 8, and the value range of D is 1 to 4.

9. The method for preparing a blade electrode based on DLP printing according to any one of claims 4 to 8, characterized in that: The light curing setting time ranges from 5s to 40s.

10. A blade electrode, characterized in that: The blade electrode is prepared by the blade electrode preparation method based on DLP printing according to any one of claims 4 to 9.

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