CN114932751B - Device and method for ultrasonically focusing and spray-printing aerosol ink particles - Google Patents
Device and method for ultrasonically focusing and spray-printing aerosol ink particles Download PDFInfo
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- CN114932751B CN114932751B CN202210642866.7A CN202210642866A CN114932751B CN 114932751 B CN114932751 B CN 114932751B CN 202210642866 A CN202210642866 A CN 202210642866A CN 114932751 B CN114932751 B CN 114932751B
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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
- B41J2/07—Ink jet characterised by jet control
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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
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
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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
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
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- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
The invention discloses a device and a method for ultrasonically focusing and spray-printing aerosol ink particles, which relate to the technical field of aerosol spray-printing and comprise a piezoelectric-ultrasonic transducer, wherein a fixing ring is arranged on the outer wall of a nozzle of an aerosol spray-printing system; the radial acoustic radiation force generated by the piezoelectric-ultrasonic transducer can realize the radial focusing of aerosol ink particles. The method based on the device can adapt to the ink types in a larger range or is not limited by the ink types, ensures that the focusing method has no damage to the ink materials, realizes the quantitative focusing of aerosol ink particles, and finally realizes the effective, reliable and accurate control of the overspray problem of aerosol spray printing.
Description
Technical Field
The invention relates to the technical field of aerosol jet printing, in particular to a device and a method for ultrasonically focusing and jet printing aerosol ink particles.
Background
Conformal electronic printing can realize the preparation of two-dimensional electronic circuit at arbitrary curved surface through modes such as rendition, direct writing and thermoforming under the prerequisite that keeps the plane electronic function to promote electronic system design flexibility, and then realize miniaturization, lightweight, the intellectuality of electronic system, be regarded as one of the innovative technology that overturns traditional electronic manufacturing. Aerosol ink-jet printing technology is a novel conformal electronic printing technology, has non-contact and high-precision jet printing characteristics, and can realize conformal printing and manufacturing of active and passive electronic components and sensors, and optimization research on the technology becomes a research hotspot in recent years.
In the aerosol ink-jet printing technology, a gap of 1-5mm exists between a spray head and a substrate due to a non-contact design mode; the diameter of the ink drop is extremely small and is only 2-5 mu m; the ink particle ejection rate is extremely high, reaching 80-100m/s, therefore, when aerosol ink particles pass through the ejection channel at high speed, the aerosol ink flow can generate drift dispersion, and the drift dispersion condition has uncertainty, so that the phenomenon of 'overspray', namely 'satellite drops' formed by the ink droplet deposition with drift dispersion, occurs around the originally planned jet printing deposition. The "satellite" may result in insufficient planned jet deposition resulting in insufficient strength, electrical performance of the printed object, and furthermore, planned nearby deposited portions may contact short circuits due to "satellite" deposition. In summary, the "overspray" caused by the drift and dispersion of the aerosol ink particles during the jetting process can cause serious problems such as insufficient deposition quality of the printed object, insufficient electrical performance and even failure.
The reliable control of the 'overspray' of the aerosol spray printing is one of the key conditions for stably preparing high-performance and high-integration conformal electrons by the aerosol spray printing, and the direct method for controlling the 'overspray' is to sufficiently focus ink particles in the aerosol spray printing process so as to inhibit the drift and dispersion of the ink particles. The current focusing methods for aerosol ink streams are mainly three:
the first method is that the flow of the carrier gas and the sheath gas is adjusted: the carrier gas is used for conveying the aerosol ink to the nozzle and determining the distribution and motion state of aerosol ink particles before jetting; the sheath gas is used for focusing and jetting aerosol ink particles in the jet printing process, so that the focusing effect of the ink flow can be controlled by adjusting the gas flow of the sheath gas and the carrier gas;
adjusting an ink channel structure inside the spray head: the uncertainty of the dispersion of the ink particles in the jetting channel is increased due to the complexity of the microscopic geometrical structure in the nozzle, and the adjustment of the geometrical structure of the ink channel in the nozzle can realize the adjustment of the appearance of the ink flow and the focusing degree of the ink particles so as to reduce the uncertainty of the drift dispersion of the ink particles in the jetting process;
and a third method, applying a magnetic radiation force to the magnetic metal ink particles by an external magnetic field for focusing: a magnetic field is arranged outside the aerosol jet printing system, and magnetic radiation force is applied to magnetic metal ink particles, so that the ink particles generate radial movement, and further the focusing of ink flow is realized.
Although the aerosol ink particle focusing method can achieve a certain focusing optimization effect, certain disadvantages exist in application practice. The first method and the second method can only realize qualitative focusing optimization, because the diversity of the physical properties of ink materials, the particularity and the unknown of the actually applied selected ink, the extremely complex correlation relationship between the physical properties of the ink and carrier gas, the sheath gas flow and the geometrical structure of an injection channel and the undefined quantitative analysis, the first method and the second method are difficult to realize the quantitative focusing of aerosol ink particles, and thus the reliable and quantitative control of 'overspray' is difficult to realize. The third method has strong dependence and selectivity on the physical properties of the focused ink material, so that in practical application, the ink selection and printing planning based on the third method have certain limitations.
Disclosure of Invention
The invention aims to provide a device and a method for ultrasonic focusing spray printing of aerosol ink particles, which are used for solving the problems in the prior art, so that the device and the method are suitable for ink types in a larger range or are not limited by the ink types, the focusing method is ensured not to damage ink materials, the quantitative focusing of the aerosol ink particles is realized, and the 'over-spraying' problem of the aerosol spray printing is effectively, reliably and accurately controlled.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a device for ultrasonically focusing and spray-printing aerosol ink particles, which comprises a piezoelectric-ultrasonic transducer, a signal generator and a power amplifier, wherein a fixing ring is arranged on the outer wall of a nozzle of an aerosol spray-printing system; the piezoelectric-ultrasonic transducer can construct an annular sound pressure environment, a radial high-frequency sound field which is fully covered by a horizontal layer is formed on the periphery of aerosol ink particle flow, and radial sound radiation force is generated, so that radial focusing on aerosol ink particles can be realized. The high-frequency sound field has the characteristics of good directivity, strong penetrability, high sensitivity, no damage to action and the like, and is one of effective means for particle manipulation, so that the invention adopts a mode of adding the annular high-frequency sound field to the aerosol ink flow jet channel to carry out radial ultrasonic focusing of full coverage of the horizontal layer surface on aerosol ink particles.
Optionally, the piezoelectric-ultrasonic transducer is a tubular structure, and an inner diameter of the piezoelectric-ultrasonic transducer is the same as an outer diameter of the nozzle.
Optionally, the length of the piezo-ultrasonic transducer is 80% of the length of the nozzle.
Optionally, the piezoelectric-ultrasonic transducer is made of a ceramic piezoelectric material, and when the inverse piezoelectric effect is realized, the generated inverse piezoelectric effect is not enough to enable the piezoelectric-ultrasonic transducer to generate resonance due to the property of the piezoelectric material under a working condition so as to affect the stable operation of the system; the internal electrode of the piezoelectric-ultrasonic transducer is made of sintered silver (thick film) material, and the external electrode is made of PVD (physical vapor deposition) thin film (CuNi, au), so that the stability of excitation input can be ensured; the inner electrode of the piezoelectric-ultrasonic transducer is made of sintered silver material, and the outer electrode of the piezoelectric-ultrasonic transducer is made of PVD (physical vapor deposition) film material.
Optionally, an ultrasonic coupling agent is added between the outer wall of the nozzle and the inner wall of the piezoelectric-ultrasonic transducer; the part of the outer wall of the nozzle, which is wrapped by the piezoelectric-ultrasonic transducer, is a focusing action area, and the outer side of the upper end and the outer side of the lower end of the piezoelectric-ultrasonic transducer are respectively bonded and connected with the part of the outer wall of the nozzle, which is outside the focusing action area, by adopting an adhesive.
Optionally, the nozzle is hollow, a conical nozzle is integrally formed at the bottom of the nozzle, the top of the nozzle is communicated with a jetting channel, and the jetting channel is used for conveying aerosol ink particles and carrier gas; the outer side of the injection channel is annularly provided with a sheath gas channel with a conical structure, and the bottom of the sheath gas channel is communicated with the outer side of the top of the nozzle.
The invention also provides a method for ultrasonically focusing and jet-printing aerosol ink particles, which comprises the following steps:
determining the focusing degree of aerosol ink particles according to the spray printing deposition distribution requirement and the internal and external environments of a spray printing system;
secondly, performing force-motion analysis on the aerosol ink particles according to the focusing action area range and the physical properties of the aerosol ink particles according to the focusing degree in the first step to determine the radial aggregation force of the aerosol ink particles;
and step three, adjusting working parameters of the ultrasonic focusing transducer according to the required radial focusing force, outputting high-frequency sound wave response corresponding to the focusing effect, generating the acoustic radiation force required by focusing to enable aerosol ink particles in the jetting process to generate radial acceleration, and finally realizing radial quantitative focusing on the aerosol ink particles.
Compared with the prior art, the invention achieves the following technical effects:
the high-frequency sound waves excited in the invention can be obtained by quantitative calculation of force-motion analysis of the acoustic radiation force on the aerosol ink particles according to the focusing requirement of jet printing and by combining the material property of the aerosol ink and the jet printing environment and by adjusting the working condition parameters of the piezoelectric-ultrasonic transducer to be accurately output, the quantitative focusing on the aerosol ink particles is realized; the piezoelectric-ultrasonic response output by the focusing device is timely, and the working condition parameters of the piezoelectric-ultrasonic transducer can be adjusted in real time according to the jet printing requirements, the jet printing environment and the change of jet printing materials, so that the real-time adjustment of the focusing effect of aerosol ink particles is realized; the method has no limit requirements on physical and chemical properties of the aerosol jet printing ink material, and is widely suitable for the ink material in the jet printing range of the aerosol jet printing method; the invention has no interference to the aerosol jet printing system and no damage to the printing ink material of the aerosol jet printing, including physical and chemical influences.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for ultrasonically focusing and jet-printing aerosol ink particles according to the present invention;
FIG. 2 is a schematic partial cross-sectional view of an apparatus for ultrasonically focusing jet printing aerosol ink particles according to the present invention;
FIG. 3 is a schematic view of the focusing state of the aerosol ink particles of the present invention;
FIG. 4 is a schematic diagram of a piezo-ultrasonic transducer according to the present invention;
FIG. 5 is a schematic cross-sectional view of a piezoelectric-ultrasonic transducer according to the present invention;
FIG. 6 is a schematic view of a nozzle structure according to the present invention;
FIG. 7 is a schematic cross-sectional view of a nozzle according to the present invention;
FIG. 8 is a schematic view of the piezoelectric-ultrasonic transducer and nozzle integrated assembly of the present invention;
FIG. 9 is a schematic diagram of a vertical cross section of an ultrasonic focusing jet printing aerosol ink particle in a working state according to the present invention;
FIG. 10 is a schematic diagram of a horizontal cross section of an ultrasonic focusing jet printing aerosol ink particle in a working state according to the present invention;
description of reference numerals: 1-aerosol jet printing system, 2-nozzle, 3-piezoelectric-ultrasonic transducer, 4-power amplifier, 5-signal generator, 6-aerosol ink particles, 7-jet channel, 8-sheath gas channel and 9-ultrasonic coupling agent.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a device and a method for ultrasonically focusing and spray-printing aerosol ink particles, which are used for solving the problems in the prior art, so as to adapt to a wide range of ink types or be not limited by the ink types, ensure that the focusing method has no damage to ink materials, realize quantitative focusing on the aerosol ink particles and finally realize effective, reliable and accurate control on the problem of 'overspray' of aerosol spray-printing.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
The invention provides a device for ultrasonically focusing and jet-printing aerosol ink particles, which comprises a piezoelectric-ultrasonic transducer 3, a power amplifier 4 and a signal generator 5, wherein the piezoelectric-ultrasonic transducer 3 is fixedly arranged on the outer wall of a nozzle 2 of an aerosol jet-printing system 1, and the power amplifier 4 is electrically connected with the signal generator 5; the piezoelectric-ultrasonic transducer 3 can construct an annular sound pressure environment, a radial high-frequency sound field which is fully covered by a horizontal layer is formed on the periphery of the aerosol ink particles 6, and radial focusing on the aerosol ink particles 6 can be realized by the generated radial sound radiation force. The high-frequency sound field has the characteristics of good directivity, strong penetrability, high sensitivity, no damage to action and the like, and is one of effective means for particle manipulation, so that the invention adopts a mode of externally adding the annular high-frequency sound field to an aerosol jet printing ink flow jet channel to carry out radial ultrasonic focusing of full coverage of a horizontal layer on aerosol ink particles 6.
Specifically, the piezoelectric-ultrasonic transducer 3 is a tubular structure to realize the radial acoustic radiation force of the full coverage of the horizontal layer, realize the radial focusing of the full coverage of the horizontal layer of the aerosol ink particles 6, and realize the sufficiency and uniformity of the particle focusing of the ink flow, and the inner diameter of the piezoelectric-ultrasonic transducer 3 is the same as the outer diameter of the nozzle 2, so as to reduce the distance between the transducer and the aerosol ink flow as much as possible, avoid the excessive attenuation of high-frequency sound wave energy in the transmission process, and ensure the high-integration matching of the piezoelectric-ultrasonic transducer 3 and the aerosol jet printing system 1. The length of the piezoelectric-ultrasonic transducer 3 is 80% of the length of the nozzle 2, and under the condition that excessive load is not added to the aerosol jet printing system 1, a sufficient focusing action range is constructed, so that aerosol ink particles are guaranteed to be subjected to sufficient focusing action in the jetting process to achieve a sufficient focusing effect.
The piezoelectric-ultrasonic transducer 3 is made of a ceramic piezoelectric material, and the piezoelectric-ultrasonic transducer 3 works based on the inverse piezoelectric effect of piezoelectric ceramics and relates to conversion of electric energy and mechanical energy. According to the inverse piezoelectric effect, an electric signal with a certain frequency can be converted into mechanical vibration with a certain frequency, and the vibration of a vibration source is transmitted in a wave form through a medium to form sound waves with a certain frequency. The signal generator and the power amplifier are used as an excitation source, an electric signal with the frequency of more than or equal to 2MHz and more than or equal to 50Vpp is input into the piezoelectric-ultrasonic transducer, and the intensity and the distribution form of the generated ultrasonic wave are adjusted by adjusting the excitation input of the electric signal, so that the force acting on the particles is controlled; the inner electrode of the piezoelectric-ultrasonic transducer is made of sintered silver material, and the outer electrode of the piezoelectric-ultrasonic transducer is made of PVD (physical vapor deposition) film material.
The nozzle 2 is hollow, a conical nozzle is integrally formed at the bottom of the nozzle 2, the top of the nozzle 2 is communicated with an injection channel 7, and the injection channel 7 is used for conveying aerosol ink particles and carrier gas; a sheath gas channel 8 with a conical structure is annularly arranged on the outer side of the injection channel 7, and the bottom of the sheath gas channel 8 is communicated with the outer side of the top of the nozzle 2; an ultrasonic coupling agent 9 is added between the outer wall of the nozzle 2 and the inner wall of the piezoelectric-ultrasonic transducer 3; the part of the outer wall of the nozzle 2, which is wrapped by the piezoelectric-ultrasonic transducer 3, is a focusing action area, the inner and outer walls of the part of the nozzle 2, which is arranged in the focusing action range, are parallel to the pipe wall of the piezoelectric-ultrasonic transducer 3, the length of the part corresponds to the length of the piezoelectric-ultrasonic transducer 3, the refraction of high-frequency sound waves caused by the change of the interface direction of a propagation medium layer in the process of passing through a channel wall, an air flow layer and an ink solvent is avoided, the change of the focusing direction of ink particles by a high-frequency sound field is further avoided, the radial ultrasonic focusing action of a horizontal layer is ensured, a micro gap is filled, and the acoustic impedance difference between the outer wall of the nozzle and the inner wall of the transducer is reduced, so that the attenuation loss of ultrasonic energy is reduced. And finally, the outer sides of the upper end and the lower end of the piezoelectric-ultrasonic transducer are bonded and connected with the part of the outer wall of the nozzle outside the focusing action area by using an adhesive, so that the piezoelectric-ultrasonic transducer and the nozzle are stably assembled, and the high-frequency sound waves are prevented from changing in direction and attenuating energy in the transmission process due to the fact that the adhesive is placed in the focusing action area. By utilizing the piezoelectric-ultrasonic transducer 3 and the electric signal excitation, the radial quantitative focusing of the full coverage of the horizontal layer surface of aerosol ink particles is realized by matching with the nozzle of the aerosol jet printing system of the ultrasonic focusing device and the connection assembly between the two in an ultrasonic focusing mode.
The invention also provides a method for spray-printing aerosol ink particles by ultrasonic focusing, which adopts the ultrasonic focusing method to carry out radial quantitative focusing of full coverage of the horizontal layer on the aerosol ink particles so as to realize reliable control of 'overspray' of aerosol spray-printing, and comprises the following steps:
firstly, aiming at the deposition requirements of aerosol spray printing, including the deposition line width and the interval between adjacent deposition lines, an acceptable range of 'overspray' is obtained, and the acceptable range refers to the maximum 'overspray' range which does not cause the contact of the adjacent deposition lines on the premise of effective deposition amount of spray printing. From the acceptable range of "overspray" and the effective deposition range, the analysis yields the degree of focusing required by the aerosol ink particles 6 during the jetting process.
Then, based on the range of a focusing area in the aerosol ink flow jetting process, analyzing the force-motion condition of aerosol ink particles in the jetting process under the action of non-focusing, wherein the force comprises the fluid drag force of a solvent and sheath gas, the motion comprises the axial speed of the ink particles in a channel, constructing a motion model of the aerosol ink particles in the axial direction of the focusing area, and calculating the time of jetting the ink particles through the focusing area.
Secondly, aiming at the focusing degree required by the aerosol ink particles 6, based on the movement time of the aerosol ink particles 6 in the focusing area, and according to the physical properties of the aerosol ink particles 6, including particle size and density, the radial force-movement analysis of the aerosol ink particles 6 in the focusing area determines the sound field parameters required by the aerosol ink particles 6 to realize the radial focusing movement, including frequency, pressure node distribution, sound pressure, sound intensity and the like.
Finally, aiming at the relevant parameters of the focusing sound field obtained by the analysis, the excitation parameters of the signal generator 5 and the power amplifier 4 are adjusted according to the excitation-response relation of the piezoelectric-ultrasonic transducer 3, so that the piezoelectric-ultrasonic transducer 3 generates a corresponding inverse piezoelectric effect, ultrasonic focusing response is output, and radial quantitative focusing of full coverage of a horizontal layer is realized on aerosol ink particles.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.
Claims (4)
1. The utility model provides a device of ultrasonic focusing jet printing aerosol ink granule which characterized in that: the device comprises a piezoelectric-ultrasonic transducer, a signal generator and a control circuit, wherein the piezoelectric-ultrasonic transducer is arranged on the outer wall of a nozzle of an aerosol jet printing system through a fixing ring, and is electrically connected with a power amplifier; the radial acoustic radiation force generated by the piezoelectric-ultrasonic transducer can realize the radial focusing of aerosol ink particles; the piezoelectric-ultrasonic transducer is of a tubular structure, and the inner diameter of the piezoelectric-ultrasonic transducer is the same as the outer diameter of the nozzle in size; an ultrasonic coupling agent is added between the outer wall of the nozzle and the inner wall of the piezoelectric-ultrasonic transducer; the part of the outer wall of the nozzle, which is wrapped by the piezoelectric-ultrasonic transducer, is a focusing action area, and the outer sides of the upper end and the lower end of the piezoelectric-ultrasonic transducer are respectively bonded and connected with the part of the outer wall of the nozzle, which is outside the focusing action area, by an adhesive; the nozzle is hollow, a conical spray head is integrally formed at the bottom of the nozzle, the top of the nozzle is communicated with a spray channel, and the spray channel is used for conveying aerosol ink particles and carrier gas; the outer side of the jet channel is annularly provided with a sheath gas channel with a conical structure, and the bottom of the sheath gas channel is communicated with the outer side of the top of the nozzle.
2. The apparatus for ultrasonic focused jet printing of aerosol ink particles as claimed in claim 1, wherein: the length of the piezoelectric-ultrasonic transducer is 80% of the nozzle length.
3. The apparatus for ultrasonic focused jet printing of aerosol ink particles as claimed in claim 1, wherein: the piezoelectric-ultrasonic transducer is made of a ceramic piezoelectric material; the inner electrode of the piezoelectric-ultrasonic transducer is made of sintered silver material, and the outer electrode of the piezoelectric-ultrasonic transducer is made of PVD (physical vapor deposition) film material.
4. A method for ultrasonically focusing and jet-printing aerosol ink particles is characterized by comprising the following steps: the method comprises the following steps:
determining the focusing degree of aerosol ink particles according to the spray printing deposition distribution requirement and the internal and external environments of a spray printing system;
secondly, aiming at the focusing degree in the first step, carrying out force-motion analysis on the aerosol ink particles according to the focusing action area range and the physical properties of the aerosol ink particles, and determining the radial focusing force of the aerosol ink particles;
and step three, adjusting working parameters of the ultrasonic focusing transducer according to the required radial focusing force, outputting high-frequency sound wave response corresponding to the focusing effect, generating the acoustic radiation force required by focusing to enable aerosol ink particles in the jetting process to generate radial acceleration, and finally realizing radial quantitative focusing on the aerosol ink particles.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4019188A (en) * | 1975-05-12 | 1977-04-19 | International Business Machines Corporation | Micromist jet printer |
| JP2006150248A (en) * | 2004-11-30 | 2006-06-15 | Seiko Epson Corp | Apparatus for discharging liquid droplet and ultrasonic vibration device |
| US20080236286A1 (en) * | 2007-03-29 | 2008-10-02 | Clive Chemo Lam | Non-destructive tubular testing |
| US8714014B2 (en) * | 2008-01-16 | 2014-05-06 | Life Technologies Corporation | System and method for acoustic focusing hardware and implementations |
| RU132064U1 (en) * | 2013-02-05 | 2013-09-10 | Федеральное Государственное Бюджетное Учреждение Науки Институт Химии И Химической Технологии Сибирского Отделения Российской Академии Наук (Иххт Со Ран) | DEVICE FOR HALOGENING SOLID DISPERSED RAW MATERIALS |
| JP2014179503A (en) * | 2013-03-15 | 2014-09-25 | Seiko Epson Corp | Liquid ejection head, liquid ejection device, piezoelectric element, ultrasonic transducer and ultrasonic device |
| CN104324839B (en) * | 2014-11-14 | 2016-08-24 | 千藤（南京）环保科技有限公司 | The most focusing a kind of ultrasonic atomizatio shower nozzle |
| CN106891414B (en) * | 2017-01-18 | 2019-10-22 | 西北工业大学 | Droplet ejection printing equipment and the method for preparing graphene metamaterial microstructure using the device |
| US20210276327A1 (en) * | 2020-03-06 | 2021-09-09 | University Of Maryland, College Park | Systems and methods for high fidelity aerosol jet printing via acoustic forces |
| CN113978132B (en) * | 2021-09-17 | 2022-08-23 | 集美大学 | Acousto-electrophoresis composite flow focusing micro-nano jet printing method and device |
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