CN117565561A - Electrohydrodynamic inkjet printing device and printing method - Google Patents
Electrohydrodynamic inkjet printing device and printing method Download PDFInfo
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- CN117565561A CN117565561A CN202410039506.7A CN202410039506A CN117565561A CN 117565561 A CN117565561 A CN 117565561A CN 202410039506 A CN202410039506 A CN 202410039506A CN 117565561 A CN117565561 A CN 117565561A
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- 238000007639 printing Methods 0.000 title claims abstract description 188
- 238000007641 inkjet printing Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000758 substrate Substances 0.000 claims abstract description 69
- 230000005684 electric field Effects 0.000 claims abstract description 47
- 239000007921 spray Substances 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
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- 239000012790 adhesive layer Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
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Classifications
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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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
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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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
- B41J2/04526—Control methods or devices therefor, e.g. driver circuits, control circuits controlling trajectory
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- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
The invention relates to the technical field of ink-jet printing. The invention provides an electrohydrodynamic inkjet printing apparatus and a printing method. The electrohydrodynamic inkjet printing apparatus provided by the present invention includes: an electrohydrodynamic inkjet printing apparatus, comprising: a print head adapted to eject printing ink; a printing electrode is arranged at a printing nozzle of the printing spray head and is connected with a positive electrode of a power supply; the printing substrate is suitable for bearing a printing stock; the printing substrate is connected with a ground wire to generate an electric field with the printing electrode between the printing nozzle and the printing substrate, and the spraying direction and the spraying speed of the printing ink are controlled; and a plurality of deflection electrodes are arranged between the printing nozzle and the printing substrate, so that the electric field is changed at corresponding positions to control the drop point of spray liquid drops formed by printing ink. The invention can realize the accurate pattern printing of electrohydrodynamic jet printing technology, and the printing pattern is uniform and has high efficiency.
Description
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to an electrohydrodynamic ink-jet printing device and a printing method.
Background
The Electrohydrodynamic (EHD) jet printing technology has been developed rapidly since the fact that Taylor proposed that droplets exhibit a conical theoretical model under an electric field in 1964, has a wider selectivity to materials, is not suitable for blocking nozzles, and can realize high-precision processing at the micron and submicron level. However, the EHD jet printing method of the related art still has problems of low efficiency and difficulty in achieving pattern uniformity.
Disclosure of Invention
Accordingly, the present invention provides an inkjet printing apparatus and a printing method for solving the problems of low efficiency and difficulty in achieving pattern uniformity in the EHD jet printing method of the related art.
The present invention provides an electrohydrodynamic inkjet printing apparatus, comprising: a print head adapted to eject printing ink; a printing electrode is arranged at a printing nozzle of the printing spray head and is connected with a positive electrode of a power supply; the printing substrate is suitable for bearing a printing stock; the printing substrate is connected with a ground wire to generate an electric field with the printing electrode between the printing nozzle and the printing substrate, and the spraying direction and the spraying speed of the printing ink are controlled; and a plurality of deflection electrodes are arranged below the printing spray head, so that the electric field is changed at corresponding positions to control the drop point of spray liquid drops formed by the printing ink.
Optionally, the printing substrate is provided with a plurality of first deflection electrodes, and the first deflection electrodes are commonly connected with the power supply; the first deflection electrode is adapted to cause a change in the electric field in the vicinity of the first deflection electrode; the first deflection electrodes are respectively connected with a control circuit and are suitable for enabling spray liquid of printing ink to drop to a set position through the combined action of different first deflection electrodes.
Optionally, the control circuit includes a plurality of first control chips, which are disposed on the printing substrate, connected to a power supply, and connected to the first deflection electrodes in a one-to-one correspondence; the electrohydrodynamic inkjet printing device further comprises a control assembly, wherein a second control chip is arranged, and the second control chip is connected with the first control chips in a signal manner so as to respectively send voltage change instruction signals to the first control chips; the first control chip is suitable for controlling the voltage change of the first deflection electrode according to the voltage change command signal.
Optionally, the first deflection electrode array is disposed on the printing substrate.
Optionally, an insulating layer is further disposed on the print substrate, and covers each of the first deflection electrodes.
Optionally, the first deflection electrode is an electrode slice with any shape within a rectangular area range of 30 μm×30 μm to 100 μm×100 μm; the minimum distance between the adjacent first deflection electrodes is as follows; the first deflection electrode is suitable for applying voltage of 0-2000V.
Optionally, at least one second deflection electrode is arranged between the printing nozzle and the printing substrate; the second deflection electrode is adapted to move horizontally in a plane perpendicular to a shortest line between the printing head and the printing substrate, and is adapted to change the electric field in a horizontal direction.
Optionally, the second deflection electrode includes a first sub deflection electrode and a second sub deflection electrode, where the first sub deflection electrode and the second sub deflection electrode are in a straight line shape, and one end of the first sub deflection electrode and one end of the second sub deflection electrode are connected and form an included angle; the second deflection electrode is adapted to rotate freely in its own plane.
Optionally, the included angle between the first sub-deflection electrode and the second sub-deflection electrode is 90 degrees; the vertical distance between the horizontal plane of the second deflection electrode and the printing nozzle is 10-2000 mu m; the shortest distance between the second deflection electrode and the shortest connecting line between the printing nozzle and the printing substrate is 200-500 microns.
The invention also provides a printing method, and the electrohydrodynamic ink jet printing device provided by the invention is used; at least comprises the following steps: placing a printing stock on the printing substrate; energizing the print substrate and the print electrode to form an electric field between the print electrode and the print substrate to adapt the printing ink ejected by the print nozzle to form a spray droplet; and controlling and adjusting the voltage of each deflection electrode to change the electric field, and forming a preset electric field layout by different electric fields at different positions so as to enable the spray liquid to drop to a preset drop point.
The technical scheme of the invention has the following advantages:
according to the electrohydrodynamic ink-jet printing device provided by the invention, the printing electric field is locally changed by arranging the plurality of deflection electrodes, so that the path of spray liquid drops passing through the electric field can be changed. By applying different voltages to the plurality of deflection electrodes, the mutual coordination control of the dripping of the spray liquid to the preset drop point can be realized. Because electrohydrodynamic ink jet printing can form spraying at the position close to the substrate, liquid drops at different positions enter electric fields at different positions, and the spray liquid drops can uniformly fall to preset falling points through the joint cooperation of deflection electrodes at different positions, so that the one-time uniform printing of a printed pattern is realized, the precise printing and uniform forming of the pattern are realized, the process steps are saved, and the printing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a printing state of an electrohydrodynamic printing apparatus;
FIG. 2 is a schematic diagram of a printing state of an electrohydrodynamic printing apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a print substrate according to an embodiment of the present invention;
FIG. 4 is a schematic top view of a printing substrate according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of another printing state of an electrohydrodynamic printing apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic view showing the positional relationship between the second deflection electrode and the printing head and the printing substrate shown in FIG. 5;
FIG. 7 is a schematic diagram of an example configuration of printing using the electrohydrodynamic printing apparatus provided by the present invention;
fig. 8 is an electron microscope image of fig. 7.
Detailed Description
According to the research of the inventor, the conventional Electrohydrodynamic (EHD) printing can form a stable Taylor cone after the ink material is extruded from a material pipe under the condition of proper material, and the Taylor cone tip can lead to a very fine material line which can be torn into mist under the action of electric field force if the needle pitch is continuously increased and the voltage is increased. Specifically, referring to fig. 1, the printing head 100 is provided with a printing electrode (not shown) at a printing nozzle to be connected to a power supply positive electrode, and a printing substrate 300 to be connected to a ground line, thereby generating an electric field between the printing electrode and the printing substrate 300. The printing ink 200 in the printing head 100 is ejected toward the printing substrate 300 under the influence of the electric field. Upon exiting the print nozzle, a stable taylor cone 210 is formed followed by a very fine line of ink. After increasing the distance between the print nozzle and the print substrate 300 and increasing the voltage, the ink lines will be torn into the spray 220 by the electric field force. In general, in order to make printing accurate, formation of spray is avoided as much as possible, and printing of dots is realized. When the pattern is required to be formed, the printing spray head is moved, or the electric field is changed, so that the printing dots are moved, and the pattern is realized. However, even in a dot pattern, the ink distribution is uneven because the ink is almost inevitably sprayed, and the ink is thicker as it gets closer to the center and thinner as it gets closer to the edge, so that uniform printing of the pattern cannot be achieved. And the printing nozzle 100 is matched with an electric field, the ink lines are deflected by moving or changing through an electrode electric field, and the pattern is printed for multiple times, so that the steps are complex and precise printing is difficult.
The present invention therefore provides an electrohydrodynamic inkjet printing apparatus comprising: a print head adapted to eject printing ink; a printing electrode is arranged at a printing nozzle of the printing spray head and is connected with a positive electrode of a power supply; the printing substrate is suitable for bearing a printing stock; the printing substrate is connected with a ground wire to generate an electric field with the printing electrode between the printing nozzle and the printing substrate, and the spraying direction and the spraying speed of the printing ink are controlled; and a plurality of deflection electrodes are arranged between the printing nozzle and the printing substrate, so that the electric field is changed at corresponding positions to control the drop point of spray liquid drops formed by printing ink. The invention provides an ink jet printing device which aims at solving the problems that an EHD jet printing mode in the prior art is low in efficiency and is difficult to realize pattern homogenization.
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
Referring to fig. 2-6, the present embodiment provides an electrohydrodynamic inkjet printing apparatus, comprising:
the print head 100 is adapted to receive and eject printing ink 200. A printing electrode (not shown in the figure) is arranged at the printing nozzle of the printing nozzle 100 and is connected with the positive electrode of a power supply;
the printing substrate 300 is adapted to carry a printing object (the printing object is not shown). The printing substrate is connected to a ground line to generate an electric field with the printing electrode between the printing head 100 and the printing substrate 300, and to control the ejection direction and speed of the printing ink 200.
Under the printing head 100, a plurality of deflection electrodes are disposed to change the electric field at corresponding positions, so as to control the drop point of the spray droplets formed by the printing ink 200.
According to the electrohydrodynamic inkjet printing device provided by the embodiment, the printing electric field is locally changed by arranging the plurality of deflection electrodes, so that the path of spray liquid drops passing through the electric field can be changed. By applying different voltages to the plurality of deflection electrodes, the mutual coordination control of the dripping of the spray liquid to the preset drop point can be realized. Because electrohydrodynamic ink jet printing can form spraying at the position close to the substrate, liquid drops at different positions enter electric fields at different positions, and the spray liquid drops can uniformly fall to preset falling points through the joint cooperation of deflection electrodes at different positions, so that the one-time uniform printing of a printed pattern is realized, the precise printing and uniform forming of the pattern are realized, the process steps are saved, and the printing efficiency is improved.
Specifically, referring to fig. 2 and fig. 3 and 4, the printing substrate 300 is provided with a plurality of first deflection electrodes 310, which are commonly connected to the power supply; the first deflection electrode 310 is adapted to cause a change in the electric field in the vicinity of the first deflection electrode. Each of the first deflection electrodes 310 is connected to a control circuit, and is adapted to cause droplets of the spray of the printing ink 200 (droplets in the spray 220) to fall to a set position by the combined action of the different first deflection electrodes 310.
Further, the control circuit includes a plurality of first control chips 320, which are disposed on the printing substrate 300, connected to a power supply, and connected to the first deflection electrodes 310 in a one-to-one correspondence; the electrohydrodynamic inkjet printing apparatus further includes a control unit (not shown) provided with a second control chip, and signal-connected to each of the first control chips 320, so as to respectively transmit a voltage change command signal to each of the first control chips 320; the first control chip 320 is adapted to control the voltage variation of the first deflection electrode 310 according to the voltage variation command signal.
Specifically, the printing substrate 300 may be provided in multiple layers, the first control chip 320 is provided at the bottom layer, the first deflection electrode 310 is provided at the top layer, the middle is connected through the conductive line 340, and the conductive line 340 is provided at the middle layer. The control component is arranged outside the printing substrate 300, the second control chip is a main control chip and is respectively connected with each first control chip 320, so that the respective control of different first deflection electrodes 310 is realized. Thus, a plurality of first deflection electrodes 310 may be formed at different positions on the printing substrate 300, and separately controlled, so that the electric field may be varied differently at different positions. So that the spray droplets can be made to fall to a predetermined drop point by the cooperation of the plurality of first deflection electrodes 310. In different embodiments, other relative positional relationships may be used to ensure that the first deflection electrodes 310 are connected to the first control chip 320 in a one-to-one correspondence.
Specifically, in this embodiment, the first deflection electrode 310 is disposed in an array on the print substrate. The arrangement of the array of the first deflection electrodes 310 can realize uniform distribution on the surface of the printing substrate 300, so that the control of landing points can be more uniform and fine.
Further, an insulating layer 330 is further disposed on the print substrate 300, and covers each of the first deflection electrodes 310. Each first deflection electrode 310 is covered by the insulating layer 330, so that each first deflection electrode 310 is isolated independently, and thus, the mutual influence between the first deflection electrodes 310 is eliminated, and the breakdown interval when the voltage is overlarge is avoided, so that the printing substrate 300 is disabled.
Specifically, in the present embodiment, the first deflection electrode 310 is an electrode sheet having an arbitrary shape within a rectangular area ranging from 30 μm×30 μm to 100 μm×100 μm. That is, a rectangular range is defined, the dimensions of the rectangle are 30 μm×30 μm to 100 μm×100 μm, and the shape of the first deflection electrode is an arbitrary shape within the rectangular range. May be of any shape, regular or irregular. The regular shape may be, for example, a circle, an intersecting line segment (e.g., an X-shape, a T-shape, an L-shape), a triangle, a rectangle, a diamond, a pentagon, a hexagon, and the like. The size of the first deflection electrode is defined by the rectangular extent. The larger the size of the rectangular range, the lower the resolution; the smaller the size, the more difficult and costly the processing becomes. Therefore, the rectangular range is limited to 30 μm×30 μm to 100 μm×100 μm, and a good balance between processing cost and resolution can be achieved.
The minimum distance between adjacent first deflection electrodes 310, i.e., the length of the shortest connecting line between adjacent first deflection electrodes 310, is 150 μm to 300 μm, and may be, for example, 150 μm, 200 μm, 250 μm, or 300 μm. If the minimum distance is less than 150 μm, the adjacent electrodes are liable to break down; if the minimum pitch is more than 300 μm, the resolution is too low. The minimum distance between adjacent first deflection electrodes 310 is in the range of 150 μm to 300 μm, which can be balanced between avoiding breakdown and higher resolution.
The voltage applied to the first deflection electrode 310 is 0 to 2000V, for example, 0, 20V, 50V, 100V, 200V, 500V, 1000V, 1500V, 2000V. If the applied voltage is too large, on one hand, the electric field is influenced, drop point deviation is easy to occur, and the printing accuracy is reduced; on the other hand, breakdown may occur, disabling the print substrate 300. The applied voltage is in the range of 0 to 2000v, which can maintain the printing accuracy as high as possible and ensure that the printing substrate 300 is not broken down. The shape, size and number of the first deflection electrodes 310 can be selected by those skilled in the art according to actual needs. For example, in other embodiments, the first deflection electrode 310 may be other shapes, such as circular, triangular, etc.
Further, referring to fig. 5 and 6, at least one second deflection electrode 400 is disposed between the printing head 100 and the printing substrate 300; the second deflection electrode 400 is adapted to move horizontally in a plane perpendicular to the shortest line between the printing head 100 and the printing substrate 300, and to change the electric field in the horizontal direction. Referring to fig. 5, it can be seen that the ink lines deflect under the influence of the second deflection electrode 400, rather than falling straight.
Specifically, in this embodiment, the second deflection electrode 400 includes a first sub-deflection electrode 410 and a second sub-deflection electrode 420, where the first sub-deflection electrode 410 and the second sub-deflection electrode 420 are in a straight line, and one end of each of them is connected and forms an included angle; the second deflection electrode is adapted to rotate freely in its own plane. Therefore, deflection can be realized on the ink lines from different directions in the horizontal plane, the direction is turned to a preset direction, and the distribution of spray liquid drops is adjusted.
Specifically, in this embodiment, the included angle between the first sub-deflection electrode and the second sub-deflection electrode is 90 °. The vertical distance between the horizontal plane of the second deflection electrode 400 and the printing nozzle is 10 μm to 2000 μm, and may be, for example, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 500 μm, 1000 μm, 1500 μm, 2000 μm. If the vertical distance is less than 10 μm, breakdown may occur; if the vertical distance is more than 2000 μm, the process is unstable. The vertical distance between the horizontal plane of the second deflection electrode 400 and the printing nozzle is in the range of 10 μm to 2000 μm, and the balance between avoiding breakdown and stabilizing the process can be achieved on the basis of free adjustment.
The shortest distance between the second deflection electrode 400 and the shortest line between the printing nozzle and the printing substrate (i.e. the line perpendicular to the horizontal plane of the printing substrate), i.e. the shortest line perpendicular to the surface of the second deflection electrode 400, is 200 μm to 500 μm, for example 200 μm, 300 μm, 400 μm, 500 μm. If the distance is less than 200 μm, breakdown is likely to occur; if the deflection is more than 500. Mu.m, the deflection effect is not remarkable. The shortest distance between the second deflection electrode 400 and the shortest connection line between the printing nozzle and the printing substrate is in the range of 200 μm to 500 μm, and a balance between avoiding breakdown and effective deflection can be achieved on the basis of free adjustment.
In different embodiments, the number of the second deflection electrodes 400 may be plural, and the second deflection electrodes may be respectively disposed at different heights, so that different degrees of deflection of the ink lines may be realized, and the printed pattern may be finer.
It will be appreciated by those skilled in the art that the first deflection electrode 310 and the second deflection electrode 400 may be used separately or in combination.
Example 2
The present embodiment provides a printing method using the electrohydrodynamic inkjet printing apparatus provided in claim 1; at least comprises the following steps:
placing a printing stock on the printing substrate;
energizing the print substrate and the print electrode to form an electric field between the print electrode and the print substrate to adapt the printing ink ejected by the print nozzle to form a spray droplet;
and controlling and adjusting the voltage of each deflection electrode to change the electric field, and forming a preset electric field layout by different electric fields at different positions so as to enable the spray liquid to drop to a preset drop point.
By using the printing method provided by the embodiment, the printing electric field is locally changed by arranging a plurality of deflection electrodes, so that the path of spray liquid drops passing through the electric field can be changed. By applying different voltages to the plurality of deflection electrodes, the mutual coordination control of the dripping of the spray liquid to the preset drop point can be realized. Because electrohydrodynamic ink jet printing can form spraying at the position close to the substrate, liquid drops at different positions enter electric fields at different positions, and the spray liquid drops can uniformly fall to preset falling points through the joint cooperation of deflection electrodes at different positions, so that the one-time uniform printing of a printed pattern is realized, the precise printing and uniform forming of the pattern are realized, the process steps are saved, and the printing efficiency is improved.
It should be noted that the precise printing realized by the electrohydrodynamic inkjet printing device provided by the scheme is not limited to the drop point of the controlled ink spray droplet on the upper surface of the printing substrate or the printing stock. Since aerial deflection of the ink spray droplets can be achieved and the degree of deflection can be controlled, printing on the sides of the substrate, even at the nip, can also be achieved. Referring to fig. 7 and 8, schematic diagrams of products printed using the electrohydrodynamic inkjet printing apparatus of embodiment 1 described above are shown for the printing method of the present embodiment. Ink 200 is formed between glass sheets 510 and 520, which are integrally bonded in advance, and the side edges of glass sheet 520. Fig. 7 is a conceptual diagram of the structure, and fig. 8 is an actual electron microscope (fig. 7 is a conceptual diagram showing only the positional relationship of each structure, and thus has a slight deviation from the actual outline of fig. 8). Fig. 8 shows that the ink layer is on the left side of the broken line boundary and the adhesive layer is on the right side. As can be seen, by controlling the deflection electrodes, ink 200 can be formed in the outer localized nip between glass sheets 510 and 520 while also coating the sides of 520. Gap filling and side coating can be achieved by one-step printing without flipping the printing target substrate (e.g., glass sheets 510 and 520 that have been formed into a unitary structure in the figures). The printing step was performed by using the electrohydrodynamic inkjet printing apparatus of example 1; one-time formation is realized, repeated stacking printing is not needed, or the printing stock is turned over for many times. The pattern formation is accurate and uniform, and the steps are simple and efficient.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. An electrohydrodynamic inkjet printing apparatus, comprising:
a print head adapted to eject printing ink; a printing electrode is arranged at a printing nozzle of the printing spray head and is connected with a positive electrode of a power supply;
the printing substrate is suitable for bearing a printing stock; the printing substrate is connected with a ground wire to generate an electric field with the printing electrode between the printing nozzle and the printing substrate, and the spraying direction and the spraying speed of the printing ink are controlled;
and a plurality of deflection electrodes are arranged below the printing spray head, so that the electric field is changed at corresponding positions to control the drop point of spray liquid drops formed by the printing ink.
2. The electrohydrodynamic inkjet printing apparatus of claim 1, wherein,
the printing substrate is provided with a plurality of first deflection electrodes which are commonly connected with the power supply; the first deflection electrode is adapted to cause a change in the electric field in the vicinity of the first deflection electrode;
the first deflection electrodes are respectively connected with a control circuit and are suitable for enabling spray liquid of printing ink to drop to a set position through the combined action of different first deflection electrodes.
3. The electrohydrodynamic inkjet printing apparatus according to claim 2 wherein,
the control circuit comprises a plurality of first control chips which are arranged on the printing substrate, connected with a power supply and connected with the first deflection electrodes in a one-to-one correspondence manner;
the electrohydrodynamic inkjet printing device further comprises a control assembly, wherein a second control chip is arranged, and the second control chip is connected with the first control chips in a signal manner so as to respectively send voltage change instruction signals to the first control chips; the first control chip is suitable for controlling the voltage change of the first deflection electrode according to the voltage change command signal.
4. The electrohydrodynamic inkjet printing apparatus according to claim 2 wherein,
the first deflection electrode array is arranged on the printing substrate.
5. The electrohydrodynamic inkjet printing apparatus according to claim 2 wherein,
an insulating layer is further arranged on the printing substrate and coats each first deflection electrode.
6. The electrohydrodynamic inkjet printing apparatus according to claim 2 wherein,
the first deflection electrode is an electrode plate with any shape within the rectangular area range of 30 mu m multiplied by 30 mu m to 100 mu m multiplied by 100 mu m;
the minimum distance between the adjacent first deflection electrodes is 150-300 mu m;
the first deflection electrode is suitable for applying voltage of 0-2000V.
7. The electrohydrodynamic inkjet printing apparatus of claim 1, wherein,
at least one second deflection electrode is arranged between the printing nozzle and the printing substrate;
the second deflection electrode is adapted to move horizontally in a plane perpendicular to a shortest line between the printing head and the printing substrate, and is adapted to change the electric field in a horizontal direction.
8. The electrohydrodynamic inkjet printing apparatus of claim 7, wherein,
the second deflection electrode comprises a first sub deflection electrode and a second sub deflection electrode, the first sub deflection electrode and the second sub deflection electrode are in a straight line, and one end of the first sub deflection electrode and one end of the second sub deflection electrode are connected and form an included angle; the second deflection electrode is adapted to rotate freely in its own plane.
9. The electrohydrodynamic inkjet printing apparatus of claim 8, wherein,
the included angle between the first sub-deflection electrode and the second sub-deflection electrode is 90 degrees;
the vertical distance between the horizontal plane of the second deflection electrode and the printing nozzle is 10-2000 mu m;
the shortest distance between the second deflection electrode and the shortest connecting line between the printing nozzle and the printing substrate is 200-500 microns.
10. A printing method characterized by using the electrohydrodynamic inkjet printing apparatus according to any one of claims 1 to 9; at least comprises the following steps:
placing a printing stock on the printing substrate;
energizing the print substrate and the print electrode to form an electric field between the print electrode and the print substrate to adapt the printing ink ejected by the print nozzle to form a spray droplet;
and controlling and adjusting the voltage of each deflection electrode to change the electric field, and forming a preset electric field layout by different electric fields at different positions so as to enable the spray liquid to drop to a preset drop point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173851A (en) * | 1981-04-18 | 1982-10-26 | Ricoh Co Ltd | Electrostatic recording device |
| CN86108108A (en) * | 1985-12-10 | 1987-12-02 | 艾里斯绘图公司 | Reduce the device of mist of oil in the ink jet printers |
| CN104417058A (en) * | 2013-08-27 | 2015-03-18 | 株式会社Enjet | Apparatus for Spraying and Patterning Using Electrostatic Force |
| CN108621580A (en) * | 2018-04-27 | 2018-10-09 | 华中科技大学 | A kind of electrohydrodynamic printing head and device |
| CN109641466A (en) * | 2016-12-08 | 2019-04-16 | 株式会社日立产机系统 | Ink-jet recording apparatus |
| US20220203605A1 (en) * | 2019-05-07 | 2022-06-30 | Universitat Rovira I Virgili | Printing device and method |
| CN117261437A (en) * | 2023-10-25 | 2023-12-22 | 华中科技大学 | Array electrofluidic jet printing device and jet printing method based on deflection electrode |
-
2024
- 2024-01-11 CN CN202410039506.7A patent/CN117565561A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57173851A (en) * | 1981-04-18 | 1982-10-26 | Ricoh Co Ltd | Electrostatic recording device |
| CN86108108A (en) * | 1985-12-10 | 1987-12-02 | 艾里斯绘图公司 | Reduce the device of mist of oil in the ink jet printers |
| CN104417058A (en) * | 2013-08-27 | 2015-03-18 | 株式会社Enjet | Apparatus for Spraying and Patterning Using Electrostatic Force |
| CN109641466A (en) * | 2016-12-08 | 2019-04-16 | 株式会社日立产机系统 | Ink-jet recording apparatus |
| CN108621580A (en) * | 2018-04-27 | 2018-10-09 | 华中科技大学 | A kind of electrohydrodynamic printing head and device |
| US20220203605A1 (en) * | 2019-05-07 | 2022-06-30 | Universitat Rovira I Virgili | Printing device and method |
| CN117261437A (en) * | 2023-10-25 | 2023-12-22 | 华中科技大学 | Array electrofluidic jet printing device and jet printing method based on deflection electrode |
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