KR20110125739A - Double piezo-inkjet printer head - Google Patents
Double piezo-inkjet printer head Download PDFInfo
- Publication number
- KR20110125739A KR20110125739A KR1020100045260A KR20100045260A KR20110125739A KR 20110125739 A KR20110125739 A KR 20110125739A KR 1020100045260 A KR1020100045260 A KR 1020100045260A KR 20100045260 A KR20100045260 A KR 20100045260A KR 20110125739 A KR20110125739 A KR 20110125739A
- Authority
- KR
- South Korea
- Prior art keywords
- ink
- piezoelectric
- nozzle
- diaphragm
- ink chamber
- Prior art date
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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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
- B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
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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
-
- 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
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14032—Structure of the pressure chamber
- B41J2/1404—Geometrical characteristics
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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
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14088—Structure of heating means
- B41J2/14112—Resistive element
- B41J2/14137—Resistor surrounding the nozzle opening
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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
- B41J2/14201—Structure of print heads with piezoelectric elements
-
- 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
- B41J2/16—Production of nozzles
- B41J2/1607—Production of print heads with piezoelectric elements
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
Abstract
Description
The present invention relates to a double piezoelectric inkjet printer head, and more particularly, piezoelectric elements are provided on the upper and lower surfaces of the ink chamber to drive the piezoelectric elements with the same pulse so that a large wave energy is applied to the nozzle. The present invention relates to a double piezoelectric inkjet printer head capable of fast driving and ink ejection by increasing the discharge pressure, and enabling to realize thin fine lines and high resolution.
In general, an inkjet printer head corresponds to a device for printing an image of a predetermined color by discharging a small droplet of printing ink to a desired position on a recording sheet. A ink source of the inkjet printer uses a heat source. Electro-thermal transducers (bubble jets) that generate bubbles by injecting ink into the ink, and volume change of the ink caused by deformation of the piezoelectric body using a piezoelectric body. There is an electro-mechanical transducer (piezoelectric method) for ejecting ink.
In the case of driving using the heat of the thermal bubble jet, a large force and a large displacement can be obtained, while the current is continuously applied, and thus the driving speed is high because the power consumption is large and the object must be operated again after the object cools down. There is a problem that falls,
In order to solve the above problems, a printer head using a non-heating piezoelectric material corresponds to a printing method using a phenomenon in which the volume changes when the piezoelectric element receives an electric field momentarily.
1 and 2 are views for explaining a general configuration of a conventional piezoelectric inkjet printer head, the upper and lower electrodes (2) (3) and the piezoelectric element (1) inserted therebetween, and the lower electrode ( 3) an actuator part disposed under the
The head of the piezoelectric inkjet printer is a method of ejecting ink droplets or droplets by applying pressure from an upper end to a lower end using a piezoelectric element. The piezoelectric inkjet printer head is a device that discharges ink by operating in a manner that vibrates ink in the head by vibrating by contraction force when voltage is applied to the piezoelectric element.
That is, since the conventional piezoelectric inkjet printer head is composed of a single piezoelectric element, such a piezoelectric inkjet printer head has only one piezoelectric element, so when the nozzle is clogged because the discharge pressure is low when the discharge is insufficient or the heat is not applied at the time of discharge. In addition, there is a disadvantage in that the controllable area of the discharge pressure is narrow when the control is performed, and it is well blocked so that the power should always be turned on. Also, in order to minimize such clogging phenomenon, there is a significant difference from the thermal driving method in terms of ink injection amount and printing speed which are consumed by performing a lot of cleaning operations during printing.
In this conventional case, there is a disadvantage that there is one piezoelectric element and a pressure is applied at the opposite side of the nozzle, the fluid pressure of the ink chamber is transmitted to the nozzle hole as the wave energy, and the spherical ink droplets A are ejected.
The present invention provides an upper piezoelectric element by installing an upper piezoelectric element in an actuator part consisting of a diaphragm of an ink chamber upper surface and a lower piezoelectric element around a nozzle formed on a nozzle plate of an ink chamber lower surface. The element is driven by the same pulse to form a phase, which is a reinforcing interference effect.As a large wave energy is applied to the nozzle, the droplet ejection pressure is increased, and a uniform rod of straight rod-shaped ink jet is discharged. In providing.
The present invention includes a first upper electrode, a first lower electrode and an upper piezoelectric element inserted therebetween; A first actuator portion disposed below the first lower electrode and configured of a diaphragm; An ink chamber in which a space is formed below the diaphragm to fill ink; A second actuator portion which forms a lower side of the ink chamber and serves as a diaphragm with a nozzle plate formed on a surface facing the diaphragm; And a second lower electrode, a second upper electrode, and a lower piezoelectric element inserted therebetween around a nozzle positioned below the nozzle plate.
The inkjet printer head according to the present invention is provided with two piezoelectric driving means including a piezoelectric vibrator around a nozzle located on the lower surface of the ink chamber together with a piezoelectric vibrator provided on the upper surface of the ink chamber. By applying the applied pulses, the wave forming the same phase reinforces and interferes with each other, so that a large wave energy is applied to the nozzles so that the straight rod-shaped ink droplets can be discharged without clogging the nozzles. Compared to the piezoelectric method, even thinner and higher resolutions can be realized by using nozzles having the same diameter.
In particular, the dual piezoelectric method of the present invention has the effect of implementing microdroplets of several tens to hundreds of minutes in the semiconductor metallization of high-viscosity metal nanoparticles using pulses synchronized with the conventional single method.
1 is a view showing a general configuration of a conventional ink jet printer head.
2 is a partially enlarged view showing a discharge form of ink droplets by an inkjet printer head.
3 is a view showing a configuration of an inkjet printer head according to the present invention.
4 is a partially enlarged view showing a discharge form of ink droplets by an inkjet printer head according to the present invention.
5 is a view showing a vibration mode of the piezoelectric vibrator according to the present invention.
6 is a view showing the application of the pulses synchronized to the two piezoelectric vibrators provided by the upper and lower vibration elements according to the present invention.
The double piezoelectric inkjet printer head of the present invention includes: a first upper electrode, a first lower electrode, and an upper piezoelectric element inserted therebetween; A first actuator portion disposed below the first lower electrode and configured of a diaphragm; An ink chamber in which a space is formed below the diaphragm to fill ink; A second actuator portion which forms a lower side of the ink chamber and serves as a diaphragm with a nozzle plate formed on a surface facing the diaphragm; And a second lower electrode, a second upper electrode, and a lower piezoelectric element inserted between the nozzles positioned below the nozzle plate.
In addition, the two piezoelectric vibrators provided by the upper and lower piezoelectric elements are configured to apply a pulse voltage so that the vibration is driven when one side is extended so that an acoustic vibration is formed.
In addition, the two piezoelectric vibrators provided by the upper and lower piezoelectric elements apply a synchronized pulse to transmit wave energy to the nozzle.
In addition, the ink filled in the
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.
As shown in FIG. 3, the double piezoelectric inkjet printer head according to the present invention includes a first
The
The ink (droplets) filled in the
The upper surface of the
The
A lower piezoelectric vibrator including a second
As shown in FIG. 5, the two piezoelectric vibrators provided by the upper and lower
In addition, as shown in FIG. 6, the two piezoelectric vibrators provided by the upper and lower
An embodiment according to the double piezoelectric inkjet printer head of the present invention thus described will be described in detail with reference to the accompanying drawings.
In the inkjet printer of the present invention, the upper piezoelectric vibrator including the first
At this time, in the present invention, the lower
That is, the two piezoelectric vibrators provided by the upper and lower
By operating the two
While the present invention has been described with reference to the exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.
10: upper piezoelectric element 12: first upper electrode
14: first lower electrode 20: diaphragm
30: ink chamber 32: ink injection portion
40: nozzle plate 45: nozzle
50: lower piezoelectric element 52: second upper electrode
54: second lower electrode A: ink drop
Claims (4)
A first actuator part disposed below the first lower electrode 14 and configured of a diaphragm 20;
An ink chamber 30 in which a space is formed below the diaphragm 20 to fill ink;
A second actuator part which forms a lower part of the ink chamber 30 and serves as a diaphragm with a nozzle plate 40 formed on a surface facing the diaphragm 20;
And a second lower electrode 54, a second upper electrode 52, and a lower piezoelectric element 50 inserted therebetween around the nozzle 45 positioned below the nozzle plate 40. Double piezoelectric inkjet print head.
The two piezoelectric vibrators provided by the upper and lower piezoelectric elements 10 and 50 have acoustic vibrations by applying a pulse voltage so that one side of the piezoelectric vibrators may be contracted when one is extended. A double piezoelectric inkjet print head characterized in that it is formed.
The two piezoelectric vibrators provided by the upper and lower piezoelectric elements (10, 50), the pulse energy is transmitted to the nozzle (45) by applying a synchronized pulse, characterized in that the double piezoelectric inkjet printer head.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100045260A KR101130889B1 (en) | 2010-05-14 | 2010-05-14 | Double piezo-inkjet printer head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100045260A KR101130889B1 (en) | 2010-05-14 | 2010-05-14 | Double piezo-inkjet printer head |
Publications (2)
Publication Number | Publication Date |
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KR20110125739A true KR20110125739A (en) | 2011-11-22 |
KR101130889B1 KR101130889B1 (en) | 2012-03-28 |
Family
ID=45395071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020100045260A KR101130889B1 (en) | 2010-05-14 | 2010-05-14 | Double piezo-inkjet printer head |
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KR (1) | KR101130889B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021125687A1 (en) * | 2019-12-20 | 2021-06-24 | 한국기계연구원 | Droplet ejection apparatus and droplet ejection method using same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000033700A (en) * | 1998-07-17 | 2000-02-02 | Fujitsu Ltd | Ink jet head and ink jet recording apparatus |
JP4683772B2 (en) | 2001-06-15 | 2011-05-18 | 株式会社半導体エネルギー研究所 | Method for manufacturing light emitting device |
KR101257840B1 (en) * | 2006-07-19 | 2013-04-29 | 삼성디스플레이 주식회사 | Inkjet head having piezoelectric actuator for restrictor |
JP2010105164A (en) * | 2008-09-30 | 2010-05-13 | Seiko Epson Corp | Liquid jet head, liquid discharge method, maintenance method, and printer |
-
2010
- 2010-05-14 KR KR1020100045260A patent/KR101130889B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021125687A1 (en) * | 2019-12-20 | 2021-06-24 | 한국기계연구원 | Droplet ejection apparatus and droplet ejection method using same |
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Publication number | Publication date |
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KR101130889B1 (en) | 2012-03-28 |
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